CN114619909B

CN114619909B - Charging control method and device, charging system and charging equipment of electric aircraft

Info

Publication number: CN114619909B
Application number: CN202210428043.4A
Authority: CN
Inventors: 刘振锐; 侯聪; 张小川; 龚宇杰; 张和
Original assignee: Guangdong Huitian Aerospace Technology Co Ltd
Current assignee: Guangdong Huitian Aerospace Technology Co Ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2023-06-02
Anticipated expiration: 2042-04-22
Also published as: CN114619909A

Abstract

The application relates to a charging control method, a charging control device, a charging system and charging equipment of an electric aircraft. The method comprises the following steps: respectively obtaining preset parameter information of a plurality of battery modules to be charged; determining at least a first battery module group and a second battery module group from the plurality of battery modules according to a set charging strategy according to preset parameter information of the plurality of battery modules; enabling the first battery module group to be connected into a first charging circuit for charging, enabling the second battery module group to be connected into a second charging circuit for charging, and enabling the second battery module group to be connected into the first charging circuit for continuous charging under the condition that the second battery module group meets preset conditions; the first charging circuit comprises a charging pile, and the second charging circuit comprises a voltage conversion device. According to the scheme provided by the embodiment of the application, the overall charging speed of a plurality of battery modules can be improved.

Description

Charging control method and device, charging system and charging equipment of electric aircraft

Technical Field

The application relates to the technical field of aircrafts, in particular to a charging control method, a charging device, a charging system and charging equipment of an electric aircraft.

Background

The power supply of some electric manned aircraft is composed of a plurality of battery modules, and the electric manned aircraft has the characteristics of large instant discharge current, short charging time, high charging safety requirement and the like. In the related art, a plurality of battery modules of an electric manned aircraft are directly charged in parallel, because the internal resistance, capacity and voltage of each battery module are different, and the lithium battery has certain requirements on the charging current and voltage. Direct parallel charging tends to result in some battery modules not being fully charged or overcharged. In the related art, one solution is to charge a battery module having a low voltage first, and then charge a battery pack having a high voltage after waiting for its voltage to rise, however, waiting causes an increase in the overall charging time.

Disclosure of Invention

In order to solve or partially solve the problems existing in the related art, the application provides a charging control method, a device, a charging system and charging equipment of an electric aircraft, which can improve the overall charging speed of a plurality of battery modules.

In one aspect, the present application provides a charging control method, including:

respectively obtaining preset parameter information of a plurality of battery modules to be charged;

Determining at least a first battery module group and a second battery module group from the plurality of battery modules according to a set charging strategy according to preset parameter information of the plurality of battery modules;

enabling the first battery module group to be connected into a first charging circuit for charging, and enabling the second battery module group to be connected into a second charging circuit for charging; the method comprises the steps of,

when the second battery module group meets the preset condition, the second battery module group is connected into the first charging circuit to continue charging;

the first charging circuit comprises a charging pile, and the second charging circuit comprises a voltage conversion device.

According to an embodiment, further comprising: determining a third battery module group from the plurality of battery modules, wherein the electric quantity of the battery modules in the third battery module group is higher than the electric quantity of the battery modules in the second battery module group;

the enabling the second battery module group to be connected into a second charging circuit for charging comprises: and communicating the second battery module group and the third battery module group with the voltage conversion device so that the third battery module group charges the second battery module group through the voltage conversion device.

According to an embodiment, when the second battery module group meets a preset condition, the method for enabling the second battery module group to be connected to the first charging circuit for continuous charging includes:

disconnecting the second battery module group, the third battery module group from the second charging circuit if the voltage difference between the third battery module group and the second battery module group does not exceed a second voltage threshold;

and if the second battery module group is the battery module group with the minimum voltage in the battery module group which is not connected with the first charging circuit, and the voltage difference value between the second battery module group and the battery module group of the first charging circuit does not exceed a first voltage threshold value, connecting the second battery module group to the first charging circuit to continue charging.

According to an embodiment, the enabling the second battery module group to be connected to the second charging circuit for charging includes:

communicating the second battery module group with the charging pile and the voltage conversion device so that the charging pile charges the second battery module group through the voltage conversion device;

the electric quantity of the first battery module group is higher than that of the second battery module group.

According to an embodiment, when the second battery module group meets a preset condition, the enabling the second battery module group to be connected to the first charging circuit to continue charging includes:

and if the second battery module group is a battery module group with the minimum voltage in the battery module group which is not connected with the first charging circuit, and the voltage difference between the second battery module group and the battery module group in the first charging circuit does not exceed a preset threshold value, disconnecting the second battery module group from the voltage conversion device and connecting the second battery module group into the first charging circuit, so that the charging pile charges the second battery module group through the first charging circuit.

According to an embodiment, further comprising:

and adjusting the voltage conversion device so that the charging current of the second battery module group in the second charging circuit is not greater than a preset current threshold value.

According to an embodiment, further comprising:

determining a second charging circuit composition mode;

controlling a mode change-over switch according to the second charging circuit composition mode to selectively form a second charging circuit of the first composition mode or a second charging circuit of the second composition mode;

Wherein the second charging circuit of the first composition mode includes the charging post such that the charging post charges the second battery module group through the voltage conversion device; the second charging circuit of the second component mode is isolated from the charging post.

Another aspect of the present application provides a charging control device, including:

at least one processor; and

at least one memory having executable code stored thereon, which when executed by the at least one processor, causes the at least one processor to perform the method of any of the above claims.

In yet another aspect, the present application provides a charging system comprising:

the battery module interface circuit comprises a plurality of battery module interface groups, wherein the battery module interface groups are used for connecting a battery module to be charged;

the switch circuit comprises a plurality of switches, is correspondingly connected with the plurality of battery module interface groups and is used for selectively connecting the corresponding battery modules into the first charging circuit or the second charging circuit;

the charging control device is used for respectively obtaining preset parameter information of a plurality of battery modules to be charged, determining at least a first battery module group and a second battery module group from the plurality of battery modules according to a set charging strategy according to the preset parameter information of the plurality of battery modules, and controlling the switch circuit to enable the first battery module group to be connected into a first charging circuit for charging, enable the second battery module group to be connected into a second charging circuit for charging, and enable the second battery module group to be connected into the first charging circuit for continuous charging under the condition that the second battery module group meets preset conditions;

Wherein:

the first charging circuit comprises a charging pile, and the charging pile is connected with the switching circuit and the charging control device;

the second charging circuit comprises a voltage conversion device, and the voltage conversion device is connected with the switching circuit and the charging control device.

According to an embodiment, the voltage conversion device includes an input positive electrode, an input negative electrode, an output positive electrode, and an output negative electrode;

the switch is provided with a fixed end, a first free end, a second free end and a third free end;

the battery module interface group comprises an anode connecting end, a cathode connecting end and a battery management controller connecting end; the battery management system comprises a battery module, a positive electrode connecting end, a negative electrode connecting end, a battery management controller and a battery management controller, wherein the positive electrode connecting end is used for connecting a positive electrode of the battery module, the negative electrode connecting end is used for connecting a negative electrode of the battery module, and the battery management controller connecting end is used for connecting with the battery management controller of the battery module;

wherein:

the fixed end of the switch is connected with the positive electrode connecting end of the corresponding battery module interface group, the first free end is connected with the positive electrode of the charging pile, the second free end is connected with the positive electrode of the input end of the voltage conversion device, and the third free end is connected with the positive electrode of the output end of the voltage conversion device;

The battery management controller connecting end of the battery module interface group is connected with the charging control device and is used for outputting the preset parameter information output by the corresponding battery management controller to the charging control device, and the negative electrode connecting end of the battery module interface group is connected with the negative electrode of the charging pile, the negative electrode of the input end of the voltage conversion device and the negative electrode of the output end of the voltage conversion device.

According to an embodiment, further comprising:

the mode change-over switch comprises a fixed end, a first free end and a second free end, wherein the fixed end of the mode change-over switch is connected with the positive electrode of the charging pile, the first free end of the mode change-over switch is connected with the positive electrode of the input end of the voltage conversion device, and the second free end of the mode change-over switch is suspended;

the charging control device is further configured to: determining a second charging circuit composition mode, and controlling the fixed end of the mode switching switch to be selectively connected with the first free end or the second free end according to the second charging circuit composition mode so as to selectively form a second charging circuit of a first composition mode or a second charging circuit of a second composition mode;

A further aspect of the present application provides a charging device for an electric aircraft, having a charging system as described above.

In the embodiment of the application, at least a first battery module group and a second battery module group are determined in a plurality of battery modules; the first battery module group is connected to the first charging circuit to be directly charged by the charging pile, the second battery module group is connected to the second charging circuit to be charged by the voltage conversion device, and then the second battery module group is connected to the first charging circuit to be continuously charged by the charging pile under the condition that the second battery module group meets the preset condition; therefore, when the battery modules cannot be directly charged in parallel due to large voltage difference, the second charging circuit is utilized to charge the second battery module group, the voltage of the second battery module group and the voltage of the first battery module group are pulled to be closer to the level capable of being charged in parallel, the time that part of the battery modules cannot be connected into a charging loop due to overlarge voltage difference is shortened, and the overall charging speed of a plurality of battery modules can be improved; on the other hand, the voltage of the second battery module group and the voltage of the first battery module group are pulled to be closer to each other, so that the two battery module groups are charged in parallel, and the possibility that the battery modules cannot be fully charged or overcharged can be avoided or reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.

Fig. 1 is a schematic structural diagram of a charging system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a charging system according to another embodiment of the present application;

fig. 3 is a schematic structural view of a charging system according to another embodiment of the present application;

fig. 4 is a schematic structural view of a charging system according to another embodiment of the present application;

FIG. 5 is a flow chart of a charge control method according to an embodiment of the present application;

FIG. 6 is a flow chart of a charge control method according to another embodiment of the present application;

fig. 7 is a flow chart of a charge control method according to another embodiment of the present application;

fig. 8 is a schematic structural diagram of a charge control device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, a first message may also be referred to as a second message, and similarly, a second message may also be referred to as a first message, without departing from the scope of the present application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The following describes the technical scheme of the embodiments of the present application in detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a charging system according to an embodiment of the present application. The charging system of the present embodiment may be used, for example, but not limited to, charging of an electric manned aircraft having a plurality of battery modules. Referring to fig. 1, the charging system of the present embodiment includes a battery module interface circuit 520, a switching circuit 540, and a charging control device 560.

The battery module interface circuit 520 includes a plurality of battery module interface groups 522, each battery module interface group 522 for connecting one of the battery modules 502 to be charged. It is understood that the battery module to be charged may be a single battery, or may be a parallel connection of a plurality of batteries with close capacities and close voltage ranges.

The switch circuit 540 includes a plurality of switches 542, where the plurality of switches 542 are correspondingly connected to the plurality of battery module interface groups 522, and are used to selectively connect the corresponding battery modules to the first charging circuit or the second charging circuit. The switch may be, for example, but not limited to, a relay switch.

The relay according to the embodiment of the present application may be, for example, an electromagnetic relay, but is not limited thereto. The relays typically used in control circuits are mostly electromagnetic relays. Common electromagnetic relays may include current relays, voltage relays, intermediate relays, various small-sized general-purpose relays, and the like. The electromagnetic relay has a structure and a working principle similar to those of a contactor and mainly comprises an electromagnetic mechanism and contacts.

The charging control device 560 is configured to obtain preset parameter information of the plurality of battery modules 502 to be charged, determine at least a first battery module group and a second battery module group from the plurality of battery modules according to a set charging policy according to the preset parameter information of the plurality of battery modules 502, and control the switch circuit 540 to enable the first battery module group to be connected to the first charging circuit for charging, enable the second battery module group to be connected to the second charging circuit for charging, and enable the second battery module group to be connected to the first charging circuit for continuous charging when the second battery module group meets a preset condition.

The first charging circuit includes a charging post 580, and the charging post 580 is connected with the switch circuit 540 and the charging control device 560. The second charging circuit includes a voltage conversion device 590, and the voltage conversion device 590 is connected to the switching circuit 540 and the charging control device 560.

The charging system of the present embodiment is configured to perform charging by determining at least one of a plurality of battery modules as a first battery module group and a second battery module group; the first battery module group is connected to the first charging circuit to be directly charged by the charging pile, the second battery module group is connected to the second charging circuit to be charged by the voltage conversion device, and then the second battery module group is connected to the first charging circuit to be continuously charged by the charging pile under the condition that the second battery module group meets the preset condition; therefore, when the battery modules cannot be directly charged in parallel due to large voltage difference, the second charging circuit is utilized to charge the second battery module group, the voltage of the second battery module group and the voltage of the first battery module group are pulled to be closer to the level capable of being charged in parallel, the time that part of the battery modules cannot be connected into a charging loop due to overlarge voltage difference is shortened, and the overall charging speed of a plurality of battery modules can be improved; on the other hand, the voltage of the second battery module group and the voltage of the first battery module group are pulled to be closer to each other, and then the two battery module groups are charged in parallel, so that the possibility that the battery modules cannot be fully charged or overcharged can be avoided or reduced.

Fig. 2 is a schematic structural diagram of a charging system according to another embodiment of the present application.

Referring to fig. 2, the charging system of the present embodiment includes a battery module interface circuit, a switching circuit, and a charging control device 560.

The charging control device 560 is configured to obtain preset parameter information of a plurality of battery modules to be charged, determine at least a first battery module group and a second battery module group from the plurality of battery modules according to a preset charging policy according to the preset parameter information of the plurality of battery modules, and control the switch circuit to enable the first battery module group to be connected to the first charging circuit for charging, enable the second battery module group to be connected to the second charging circuit for charging, and enable the second battery module group to be connected to the first charging circuit for continuous charging when the second battery module group meets preset conditions. The first charging circuit comprises a charging pile 580, the charging pile 580 is connected with the switching circuit and the charging control device 560, and the charging pile 580 comprises a positive electrode A+ and a negative electrode A-. The second charging circuit includes a voltage conversion device 590, and the voltage conversion device 590 is connected to the switching circuit and the charging control device 560. The voltage conversion device 590 is a dc-dc voltage conversion device, and includes an input terminal positive electrode b+, an input terminal negative electrode B-, an output terminal positive electrode c+, and an output terminal negative electrode C-. The charge control device 560 may control the charging post 580, the voltage conversion device 590 to start or stop, and adjust the output current and/or the output voltage of the charging post 580, the voltage conversion device 590.

The battery module interface circuit comprises a plurality of battery module interface groups, each battery module interface group is used for being connected with a battery module to be charged, wherein the battery module comprises a battery management controller, and the battery manager can obtain preset parameter information such as voltage, current, temperature, electric quantity and the like of the corresponding battery module. In this embodiment, a plurality of battery modules are denoted as B1 to Bn, and battery management controllers of the plurality of battery modules are denoted as BMSs 1 to BMSn. The battery module interface group includes a positive connection terminal 522a, a negative connection terminal 522b, and a battery management controller connection terminal 522c; wherein the positive electrode connection terminal 522a is used for connecting the positive electrode of the battery module; the negative electrode connection end 522B is used for connecting the negative electrodes of the battery modules, and the negative electrode connection ends 522B of the plurality of battery module interface groups are connected in parallel and are connected with the negative electrode A of the charging pile 580, the input end negative electrode B of the voltage conversion device 590 and the output end negative electrode C; the battery management controller connection terminal 522c is connected to the battery management controller and the charging control device 560, and is configured to output preset parameter information output by the corresponding battery management controller to the charging control device 560.

The switch circuit comprises a plurality of switches, labeled as S1-Sn, and the switches S1-Sn are correspondingly connected with the battery module interface groups and are used for selectively connecting the corresponding battery modules into the first charging circuit or the second charging circuit. The switches S1 to Sn may be three-way switches, for example, and have a fixed end PA, a first free end QA1, a second free end QA2, and a third free end QA3. The fixed ends PA of the switches S1-Sn are respectively connected with the positive electrode connecting ends 522a of the corresponding battery module interface groups; the first free ends QA1 of the plurality of switches S1 to Sn are connected in parallel with the positive electrode a+ of the charging pile 580; the second free ends QA2 of the switches S1-Sn are connected in parallel with the positive electrode B+ of the input end of the voltage conversion device 590; the third free ends QA3 of the plurality of switches S1 to Sn are connected in parallel to the output terminal positive electrode c+ of the voltage conversion device 590. The plurality of switches S1 to Sn are controllable by the charge control device 560, and the charge control device 560 can charge the corresponding battery module by connecting the fixed end PA of the switch to the first free end QA1, the second free end QA2, or the third free end QA3, or by connecting the corresponding battery module to the first charge circuit, or by connecting the corresponding battery module to the second charge circuit.

In another embodiment, the charging system further comprises a mode switch. In the example shown in fig. 2, the mode changeover switch is denoted St. The mode switch St includes a fixed end PB, a first free end QB1, and a second free end QB2. The fixed end PB of the mode switch St is connected with the positive electrode A+ of the charging pile, the first free end QB1 of the mode switch St is connected with the positive electrode B+ of the input end of the voltage conversion device, and the second free end QB2 of the mode switch is suspended. The charge control device 560 is also configured to: determining a second charging circuit composition mode, and controlling the fixed end PB of the mode switch St to be selectively connected with the first free end QB1 or the second free end QB2 according to the second charging circuit composition mode so as to selectively form a second charging circuit of a first composition mode or a second charging circuit of a second composition mode; wherein the second charging circuit of the first composition mode includes a charging post 580, such that the charging post 580 charges the second battery module group through a voltage conversion device 590; the second charging circuit of the second component mode is isolated from the charging peg 580.

In one embodiment, the second charging circuit composition mode is determined according to the number of battery modules connected to the charging system, which are divided into battery module groups that are different from each other but are not chargeable in parallel. For example, when the battery modules connected to the charging system can be divided into two battery module groups having large differences, a second charging circuit of a first composition mode is formed, and when the battery modules connected to the charging system can be divided into three or more battery module groups having large differences, a second charging circuit of a second composition mode is formed; different charging strategies can be selected under the two composition modes, so that the applicability and flexibility of the charging system can be improved. The switching of the two component modes is performed by setting the mode switching switch, and the circuit has the advantage of simple structure.

Fig. 3 is a schematic structural diagram of a charging system according to another embodiment of the present application.

Fig. 3 shows 3 battery modules B1, B2, B3 having different amounts of electricity, which are respectively defined as a first battery module group, a second battery module group, and a third battery module group, and a second charging circuit of a second constituent mode is formed by communicating a fixed end of the mode changeover switch St with a second free end. For ease of understanding, in this example, it is assumed that the electrical quantity of the first battery module group is 25%, the electrical quantity of the second battery module group is 50%, and the electrical quantity of the third battery module group is 75%, that is, the electrical quantity of the third battery module group is higher than the electrical quantities of the first battery module group and the second battery module group, and the electrical quantity of the first battery module group is lower than the electrical quantity of the second battery module group. It is to be understood that the present application is not limited thereto.

In this embodiment, after detecting that three battery modules are connected to the charging system, the charging control device 560 may obtain preset parameter information of voltage, current, temperature, electric quantity, etc. of the corresponding battery modules from the battery management controllers BMS1 to BMS3 of each battery module B1 to B3, and further may determine the three battery modules B1 to B3 as the first battery module group B1, the second battery module group B2, and the third battery module group B3 according to the electric quantity and the set first charging policy, respectively.

It will be appreciated that in practical applications, n (n is greater than 3) battery modules to be charged may be connected to the charging system for charging, and the first battery module group, the second battery module group, and/or the third battery module group may include more than one battery module. For example, battery modules with similar amounts of electricity may be identified to the same battery module group by having similar battery module voltage ranges. The charge control device 560 determines the n battery modules B1 to Bn as the first battery module group B1, the second battery module group B2, and the third battery module group B3 based on the electric quantities SOC1 to SOCn of the n battery modules B1 to Bn. For example, among the n battery modules B1 to Bn, a battery module having an electric power in the range (100%, 75%) is determined as the third battery module group B3, a battery module having an electric power in the range (75%, 50%) is determined as the second battery module group B2, and a battery module having an electric power in the range (50%, 0%) is determined as the first battery module group B1.

The charging control device 560 controls the switch S1 corresponding to the battery module B1 in the first battery module group, and communicates the fixed end and the first free end of the switch S1, so that the positive electrode of the battery module B1 is connected with the positive electrode of the charging pile 580, and the battery module B1 is connected to the first charging circuit; the charging current of the first charging circuit flows through a loop formed by the positive electrode a+ of the charging pile 580, the switch S1, the positive electrode of the battery module B1, the negative electrode of the battery module B1, and the negative electrode a-of the charging pile 580.

The charging control device 560 controls the switch S2 corresponding to the battery module B2 in the second battery module group, connects the fixed end of the switch S2 with the third free end, connects the positive electrode of the battery module B2 with the positive electrode c+ of the output end of the voltage conversion device 590, controls the switch S3 corresponding to the battery module B3 in the third battery module group, connects the fixed end of the switch S3 with the second free end, and connects the positive electrode of the battery module B3 with the positive electrode b+ of the input end of the voltage conversion device 590. Thereby, the battery modules B2 and B3 are connected to the second charging circuit; on the other hand, the charging control device 560 may control the voltages of the input terminal and the output terminal of the voltage conversion device 590 according to the voltages of the battery modules B2 and B3, so that the battery module B3 charges the battery module B2 through the voltage conversion device 590; the charging current of the second charging circuit flows through a loop formed by the positive electrode b+ of the input end of the voltage conversion device 590, the switch S3, the positive electrode of the battery module B3, the negative electrode B of the input end of the voltage conversion device 590, the positive electrode c+ of the output end of the voltage conversion device 590, the switch S2, the positive electrode of the battery module B2, the negative electrode of the battery module B2, and the negative electrode C of the output end of the voltage conversion device 590.

In the case where the charge control device 560 detects that the battery modules B2 and B3 meet the preset condition, for example, the difference between the amounts of electricity or the difference between the voltages of the battery modules B2 and B3 is within the preset range, the battery modules B2 and/or B3 may be changed to be charged into the first charging circuit by controlling the switches S2 and/or S3.

Fig. 4 is a schematic structural diagram of a charging system according to another embodiment of the present application.

Fig. 4 shows 2 battery modules B1 and B2 having different amounts of electricity, which are respectively defined as a first battery module group and a second battery module group, and a second charging circuit of a first composition mode is formed by communicating a fixed end of the mode changeover switch St with a first free end. For ease of understanding, it is assumed in this example that the electrical quantity of the first battery module group is 50% and the electrical quantity of the second battery module group is 25%, that is, the electrical quantity of the first battery module group is higher than the electrical quantity of the second battery module group. It is to be understood that the present application is not limited thereto.

In this embodiment, after detecting that two battery modules are connected to the charging system, the charging control device 560 may obtain preset parameter information of voltage, current, temperature, electric quantity, etc. of the corresponding battery modules from the battery management controllers BMS1 and BMS2 of each battery module B1 and B2, and further may determine the two battery modules B1 and B2 as the first battery module group B1 and the second battery module group B2 according to the electric quantity and the set second charging policy, respectively. It can be appreciated that in practical applications, n (n is greater than 2) battery modules to be charged may be connected to the charging system for charging, and the first battery module group and the second battery module group may include more than one battery module. For example, battery modules with similar amounts of electricity may be identified to the same battery module group by having similar battery module voltage ranges.

The charging control device 560 controls the switch S1 corresponding to the battery module B1 in the first battery module group, and communicates the fixed end and the first free end of the switch S1, so that the positive electrode of the battery module B1 is connected with the positive electrode a+ of the charging pile 580, and the battery module B1 is connected to the first charging circuit; the charging current of the first charging circuit flows through a loop formed by the positive electrode a+ of the charging pile 580, the switch S1, the positive electrode of the battery module B1, the negative electrode of the battery module B1, and the negative electrode a-of the charging pile 580.

The charge control device 560 controls the switch S2 corresponding to the battery module B2 in the second battery module group, and communicates the fixed end of the switch S2 with the third free end, so that the positive electrode of the battery module B2 is connected with the positive electrode c+ of the output end of the voltage conversion device 590, and controls the mode control switch St, and communicates the fixed end of the switch St with the first free end. Thereby, the battery module B2 is connected to the second charging circuit 52; on the other hand, the charging control device 560 may control the voltages of the input terminal and the output terminal of the voltage conversion device 590 according to the voltages of the battery modules B1 and B2, so that the charging pile 580 charges the battery module B2 through the voltage conversion device 590; the charging current of the second charging circuit flows through a loop formed by the positive electrode A+ of the charging pile 580, the switch St, the positive electrode B+ of the input end of the voltage conversion device 590, the positive electrode C+ of the output end of the voltage conversion device 590, the switch S2, the positive electrode of the battery module B2, the negative electrode of the battery module B2 and the negative electrode B-of the input end of the voltage conversion device 590.

In the case where the charging control device 560 detects that the battery module B2 meets the preset condition, for example, the difference between the amounts of electricity or the voltage of the battery modules B1 and B2 is within the preset range, the battery module B2 may be changed to be charged by accessing the first charging circuit by controlling the switch S2.

The application also provides charging equipment of the electric aircraft, which is provided with the charging system.

Fig. 5 is a flow chart of a charging control method according to an embodiment of the present application.

Referring to fig. 5, the charge control method of the present embodiment includes:

in step S501, preset parameter information of a plurality of battery modules to be charged is obtained, respectively.

In step S502, at least a first battery module group and a second battery module group are determined from the plurality of battery modules according to a set charging strategy according to preset parameter information of the plurality of battery modules.

In an embodiment, according to the electric quantity information of the plurality of battery modules, at least one battery module with the electric quantity within the first electric quantity range is determined as a first battery module group from the plurality of battery modules, and at least one battery module with the electric quantity within the second electric quantity range is determined as a second battery module group.

In other embodiments, at least one battery module having a voltage within a first voltage range is determined as a first battery module group from the plurality of battery modules and at least one battery module having a voltage within a second voltage range is determined as a second battery module group based on the voltage information of the plurality of battery modules.

In step S503, the first battery module group is connected to the first charging circuit for charging, and the second battery module group is connected to the second charging circuit for charging; the first charging circuit comprises a charging pile, and the second charging circuit comprises a voltage conversion device.

In step S504, if the second battery module group meets the preset condition, the second battery module group is connected to the first charging circuit to continue charging.

The charge control method of the present embodiment is achieved by determining at least one of a plurality of battery modules as a first battery module group and a second battery module group; the first battery module group is connected to the first charging circuit to be directly charged by the charging pile, the second battery module group is connected to the second charging circuit to be charged by the voltage conversion device, and then the second battery module group is connected to the first charging circuit to be continuously charged by the charging pile under the condition that the second battery module group meets the preset condition; therefore, when the battery modules cannot be directly charged in parallel due to large voltage difference, the second charging circuit is utilized to charge the second battery module group, the voltage of the second battery module group and the voltage of the first battery module group are pulled to be closer to the level capable of being charged in parallel, the time that part of the battery modules cannot be connected into a charging loop due to overlarge voltage difference is shortened, and the overall charging speed of a plurality of battery modules can be improved; on the other hand, the voltage of the second battery module group and the voltage of the first battery module group are pulled to be closer to each other, so that the two battery module groups are charged in parallel, and the possibility that the battery modules cannot be fully charged or overcharged can be avoided or reduced.

In one embodiment, the charging system is selectively enabled to form the second charging circuits with different composition modes by controlling a mode switch, so as to select the second charging circuits with different compositions to charge the second battery module group. It will be appreciated that in other embodiments, the composition of the second charging circuit of the charging system is fixed.

In an embodiment, the second charging circuit composition mode may be determined according to the number of battery modules connected to the charging system and divided into battery module groups which are different from each other but not chargeable in parallel, and the switch may be controlled according to the second charging circuit composition mode to selectively form the second charging circuit of the corresponding mode. For example, when the battery modules connected to the charging system can be divided into two battery module groups having large differences, a second charging circuit of a first composition mode is formed, and when the battery modules connected to the charging system can be divided into three or more battery module groups having large differences, a second charging circuit of a second composition mode is formed; the second charging circuit in the first composition mode comprises the charging pile, so that the charging pile charges the second battery module group through the voltage conversion device; the second charging circuit of the second composition mode is isolated from the charging post.

The charging control method of another embodiment of the present application includes:

PA1, respectively obtaining preset parameter information of a plurality of battery modules to be charged;

the PA2 is used for determining a first battery module group, a second battery module group and a third battery module group from the battery modules according to preset parameter information of the battery modules and a set charging strategy, wherein the electric quantity of the battery modules in the third battery module group is higher than that of the battery modules in the second battery module group;

the PA3 is used for connecting the first battery module group into the first charging circuit for charging, so that the charging pile directly charges the first battery module group, and the second battery module group and the third battery module group are communicated with the voltage conversion device, so that the third battery module group charges the second battery module group through the voltage conversion device;

PA4, disconnecting the second battery module group and the third battery module group from the second charging circuit if the voltage difference between the third battery module group and the second battery module group does not exceed the second voltage threshold;

and PA5, if the second battery module group is the battery module group with the minimum voltage in the battery module group which is not connected with the first charging circuit, and the voltage difference value between the second battery module group and the battery module group of the first charging circuit does not exceed the first voltage threshold value, connecting the second battery module group to the first charging circuit for continuous charging.

Similarly, if the third battery module group is the battery module group with the minimum voltage in the battery module groups which are not connected to the first charging circuit, and the voltage difference between the third battery module group and the battery module group of the first charging circuit does not exceed the first voltage threshold value, the third battery module group is connected to the first charging circuit for charging.

According to the embodiment, when the battery modules cannot be directly charged in parallel due to large voltage difference, the second charging circuit is utilized to charge the third battery module to the second battery module group, the voltage of the second battery module group and the voltage of the first battery module group are pulled to be closer to the level capable of being charged in parallel, and the time that part of the battery modules in the second battery module group cannot be directly charged by the charging piles can be shortened, so that the overall charging speed of a plurality of battery modules is improved.

In an embodiment, the electric quantity of the battery modules in the third battery module group is higher than the electric quantity of the battery modules in the first battery module group, and the electric quantity of the battery modules in the first battery module group is higher than the electric quantity of the battery modules in the second battery module group, that is, the first battery module group with low electric quantity is connected into the first charging circuit and directly charged by the charging pile, the third battery module group with high electric quantity and the second battery module group with medium electric quantity are connected into the second charging circuit, and the third battery module group charges the second battery module through the voltage conversion device. Therefore, the voltages of the batteries can be pulled to the level close to each other as soon as possible, the time that the battery pack cannot be connected into the charging circuit due to the overlarge pressure difference is shortened, and the overall charging speed is higher.

The charging control method of the further embodiment of the application comprises the following steps:

PB1 respectively obtaining preset parameter information of a plurality of battery modules to be charged.

PB2, determining a first battery module group and a second battery module group from the plurality of battery modules according to preset parameter information of the plurality of battery modules and a set charging strategy; wherein, the electric quantity of the first battery module group is higher than that of the second battery module group.

PB3, insert first battery module group into first charging circuit and charge, make the electric pile charge for first battery module group directly to will second battery module group inserts second charging circuit, with second battery module group and charge stake, voltage conversion device intercommunication, make the electric pile charge for second battery module group through voltage conversion device.

PB4, if the second battery module group is the battery module group with the minimum voltage in the battery module group which is not connected with the first charging circuit, and the voltage difference between the second battery module group and the battery module group in the first charging circuit does not exceed the preset threshold value, disconnecting the second battery module group from the voltage conversion device and connecting the second battery module group to the first charging circuit, so that the charging pile continuously charges the second battery module group through the first charging circuit.

According to the embodiment, when the battery modules cannot be directly charged in parallel due to large voltage difference, the second charging circuit is utilized to charge the second battery module group through the voltage conversion device by the charging pile, the voltage of the second battery module group and the voltage of the first battery module group are pulled to be closer to the level capable of being charged in parallel, and the time that the battery modules in the second battery module group cannot be connected into the charging circuit can be shortened, so that the overall charging speed of a plurality of battery modules is improved.

Fig. 6 is a flowchart of a charging control method according to another embodiment of the present application. The method of the present embodiment may be applied to, but is not limited to, the charging system shown in fig. 3.

Referring to fig. 3 and 6, the charge control method of the present embodiment includes:

in step S601, the respective amounts of electricity of the three battery modules to be charged are obtained, respectively.

In a specific implementation, before S601, after detecting that three battery modules are connected to a charging system, the charging control device communicates a fixed end of a module change-over switch St with a second free end in suspension to form a second charging circuit in a second composition mode; in this mode, the charging post is isolated from the second charging circuit.

In step S602, a first battery module group, a second battery module group, and a third battery module group are determined from the three battery modules according to the respective amounts of electricity of the three battery modules and the set charging strategy. The electric quantity of the third battery module group is higher than the electric quantity of the first battery module group and the electric quantity of the second battery module group, and the electric quantity of the first battery module group is lower than the electric quantity of the second battery module group.

In the specific example shown in fig. 3, three battery modules B1 to B3 are respectively defined as a first battery module group B1, a second battery module group B2, and a third battery module group B3. It is understood that in other embodiments, there may be n (n is greater than 3) battery modules to be charged connected to the charging system for charging, and the first battery module group, the second battery module group, and/or the third battery module group may include more than one battery module. For convenience of description, description is made below based on the example of fig. 3.

In step S603, a switch S1 corresponding to the battery module B1 is controlled to enable the battery module B1 to be connected to the first charging circuit, and the charging pile is controlled to charge the battery module B1.

In one embodiment, S603 includes:

a1, the charging control device communicates the fixed end of the switch S1 with the first free end, so that the positive electrode of the battery module B1 is connected with the positive electrode of the charging pile;

a2, the charging control device is communicated with the charging pile, so that the charging pile starts a charging process to charge the battery module B1.

In step S604, the switch S2 corresponding to the battery module B2 and the switch S3 corresponding to the battery module B3 are controlled, so that the battery modules B2 and B3 are connected to the second charging circuit, and the battery module B3 is controlled to charge the battery module B2 through the voltage conversion device.

It will be appreciated that step S604 may be performed simultaneously with S603 or prior to step S603.

In one specific implementation, S604 includes:

the charging control device communicates the fixed end of the switch S2 with the third free end, so that the positive electrode of the battery module B2 is connected with the positive electrode C+ of the output end of the voltage conversion device, and communicates the fixed end of the switch S3 with the second free end, so that the positive electrode of the battery module B3 is connected with the positive electrode B+ of the input end of the voltage conversion device; thereby, the battery modules B2 and B3 are connected to the second charging circuit;

and C2, the charging control device is communicated with the voltage conversion device, so that the voltage conversion device is started, and the battery module B3 charges the battery module B2 through the voltage conversion device.

It can be understood that the charging control device may control the voltages of the input terminal and the output terminal of the voltage conversion device according to the voltages of the battery modules B2 and B3, so as to control the charging current of the second charging circuit to sequentially flow through the input terminal positive electrode b+, the switch S3, the positive electrode of the battery module B3, the negative electrode of the battery module B3, the input terminal negative electrode B of the voltage conversion device 590, the output terminal positive electrode c+, the switch S2, the positive electrode of the battery module B2, the negative electrode of the battery module B2, and the output terminal negative electrode C of the voltage conversion device 590, so that the battery module B3 charges the battery module B2 through the voltage conversion device.

In one embodiment, the charging control device obtains the real-time charging current of the battery module B2 from the battery management controller BMS2 of the battery module B2, and communicates with the voltage conversion device to adjust the output voltage of the voltage conversion device so that the charging current of the battery module B2 is not greater than the preset charging current threshold.

In step S605, it is determined whether or not the battery module reaches a full charge state; if so, disconnecting the battery module reaching the full charge state from the first charging circuit, and executing step S609; if not, step S606 is performed.

In one embodiment, if a battery module reaches a full charge state, the battery module is in communication with a charging pile, the charging pile is requested to reduce a charging current corresponding to the battery module to be less than a preset value (for example, but not limited to zero), after the charging pile responds, the charging control device monitors the charging current corresponding to the battery module, and after detecting that the charging current is less than the preset value (for example, but not limited to 5 amperes) and lasts for more than a preset time period (for example, but not limited to 10 seconds), the corresponding switch is turned off, so that the battery module is disconnected from the first charging circuit.

In step S606, the voltage U2 of the battery module B2 and the voltage U3 of the battery module B3 are obtained.

In one embodiment, the charge control device obtains voltages U2, U3 from battery management controllers BMS2, BMS3 of battery modules B2, B3,

in step S607, it is determined whether the voltage difference |u2-u3| between the battery module B2 and the battery module B3 does not exceed the preset first voltage threshold H1; if yes, go to step S608; if not, the process returns to step S605.

It will be appreciated that the voltage difference |u2-u3| between battery module B2 and battery module B3 exceeds the preset first voltage threshold, and battery module B3 continues to charge battery module B2 through the voltage conversion device until the voltage difference between battery module B2 and battery module B3 does not exceed the preset first voltage threshold.

In step S608, the switch S2 corresponding to the battery module B2 and the switch S3 corresponding to the battery module B3 are controlled to disconnect the battery modules B2 and B3 from the second charging circuit.

In one embodiment, the charging control device determines whether the voltage difference |u2-u3| between the battery module B2 and the battery module B3 does not exceed the preset first voltage threshold, communicates with the voltage conversion device, requests the voltage conversion device to reduce the output current to less than the preset value (for example, but not limited to zero), and after responding, the charging control device monitors the charging current of the second charging circuit, and after detecting that the charging current of the second charging circuit is less than the preset value (for example, but not limited to 5 amperes) and continues to exceed the preset duration (for example, but not limited to 10 seconds), turns off the switches S2 and S3, thereby disconnecting the battery modules B2 and B3 from the second charging circuit.

In step S609, it is determined whether any one of the battery module B2 and the battery module B3 meets a preset condition for switching to the first charging circuit, and if so, step S610 is performed.

In one embodiment, the preset condition for switching to the first charging circuit is: the battery module with the smallest voltage is not fully charged and is not connected to all battery modules of the first charging circuit, and the difference between the voltage of the battery module with the smallest voltage and the voltage of the battery module of the current first charging circuit does not exceed a preset second voltage threshold value. It is understood that the second voltage threshold may be equal to or unequal from the first voltage threshold.

In step S610, the battery module that meets the condition of switching to the first charging circuit is connected to the first charging circuit.

In an embodiment, if the battery module B2 meets the condition of switching to the first charging circuit, the switch S2 corresponding to the battery module B2 is controlled, and the fixed end of the switch S2 is communicated with the first free end, so that the positive electrode of the battery module B2 is connected with the positive electrode of the charging pile, and the battery module B2 is connected to the first charging circuit to continue charging.

In one embodiment, before the fixed end of the switch S2 is connected to the first free end, the charging control device communicates with the charging pile, requests the charging pile to reduce the charging current of the corresponding branch to less than a preset value (for example, but not limited to zero), monitors the charging current of the branch after the charging pile responds, and connects the fixed end of the switch S2 to the first free end after detecting that the charging current is less than the preset value (for example, but not limited to 12 amperes). Therefore, by limiting the current when the switch is switched, protective measures can be provided for the switch, the occurrence of the arcing phenomenon or the arcing phenomenon is avoided, the problems of aging and failure of the switch contact are reduced, the service life of the switch is prolonged, and the reliability of the switch is improved.

In step S611, the total charge current value of the charging pile is updated, and the charging pile is output according to the total charge current value.

In an embodiment, the total charging current value I1 of the charging pile may be updated according to the number of battery modules currently connected to the first charging circuit and the minimum value of the battery module request current connected to the first charging circuit, i.e. i1=the minimum value of the battery module request current connected to the first charging circuit.

For example, when it is determined in step S605 that the battery module has reached the full charge state and the full charge battery module is disconnected from the first charging circuit, the number of battery modules connected to the first charging circuit is reduced, and the updated total charging current value of the charging pile is also reduced;

for another example, after the battery module B2 is connected to the first charging circuit in step S610, the number of battery modules connected to the first charging circuit is increased, and the updated total charging current value of the charging pile is also increased.

In step S612, it is determined whether all the battery modules connected to the first charging circuit reach a full charge state; if yes, exiting the charging mode; if not, step S605 is performed.

In an embodiment, if all the battery modules connected to the first charging circuit reach a full charge state, the charging pile and the voltage conversion device may be stopped, and the connection between all the battery modules and the charging pile may be disconnected, so as to exit the charging mode.

Fig. 7 is a flowchart of a charging control method according to another embodiment of the present application. The method of the present embodiment may be applied to, but is not limited to, the charging system shown in fig. 4.

Referring to fig. 4 and 7, the charge control method of the present embodiment includes:

in step S701, the respective amounts of electricity of the two battery modules to be charged are obtained, respectively.

In a specific implementation, before S701, after detecting that two battery modules are connected to a charging system, the charging control device communicates a fixed end and a first free end of a module change-over switch St to form a second charging circuit in a first composition mode; in this mode, the charging pile charges the battery module connected to the second charging circuit through the voltage conversion device.

In step S702, a first battery module group and a second battery module group are determined from the two battery modules according to the respective electric quantities of the two battery modules and a set charging strategy, wherein the electric quantity of the first battery module group is higher than that of the second battery module group.

In the specific example shown in fig. 4, two battery modules B1 and B2 are determined as a first battery module group B1 and a second battery module group B2, respectively. It will be appreciated that in other embodiments, there may be n (n is greater than 2) battery modules to be charged coupled to the charging system for charging, and the first battery module group, and/or the second battery module group may include more than one battery module. For convenience of description, description is made below based on the example of fig. 4.

In step S703, the switch S1 corresponding to the battery module B1 is controlled, so that the battery module B1 is connected to the first charging circuit, and the charging pile is controlled to charge the battery module B1.

One specific implementation may refer to the description of step S603, and will not be repeated.

In step S704, the switch S2 corresponding to the battery module B2 is controlled to enable the battery module B2 to be connected to the second charging circuit, and the charging pile is controlled to charge the battery module B2 through the voltage conversion device.

It is understood that step S704 may be performed simultaneously with S703 or before step S703.

In one specific implementation, S704 includes:

d1, the charging control device communicates the fixed end of the switch S2 with the third free end, so that the positive electrode of the battery module B2 is connected with the positive electrode c+ of the output end of the voltage conversion device; thereby, the battery module B2 is connected into the second charging circuit;

and D2, the charging control device is communicated with the voltage conversion device, so that the voltage conversion device is started, and the charging pile charges the battery module B2 through the voltage conversion device.

It can be understood that the charging control device can control the voltages of the input end and the output end of the voltage conversion device according to the voltages of the battery modules B1 and B2, so as to control the charging current of the second charging circuit to sequentially flow through the positive electrode a+, the switch St of the charging pile, the positive electrode b+ of the input end of the voltage conversion device, the positive electrode c+ of the output end of the voltage conversion device, the switch S2, the positive electrode of the battery module B2, the negative electrode of the battery module B2, and the negative electrode a-of the charging pile, so that the charging pile charges the battery module B2 through the voltage conversion device.

In step S705, it is determined whether or not the battery module reaches a full charge state; if so, disconnecting the battery module reaching the full charge state from the first charging circuit, and executing step S708; if not, step S706 is performed.

In step S706, it is determined whether or not the battery module B2 meets a preset condition for switching to the first charging circuit, and if so, step S707 is performed.

In one embodiment, the preset condition for switching to the first charging circuit is: the battery module with the smallest voltage is not fully charged and is not connected to all battery modules of the first charging circuit, and the difference between the voltage of the battery module with the smallest voltage and the voltage of the battery module of the current first charging circuit does not exceed a preset third voltage threshold value.

In step S707, the battery module B2 is connected to the first charging circuit to continue charging.

In one embodiment, before the fixed end of the switch S2 is connected to the first free end, the charging control device communicates with the charging pile, requests the charging pile to reduce the charging current of the corresponding branch to less than a preset value (for example, but not limited to zero), monitors the charging current of the branch after the charging pile responds, and connects the fixed end of the switch S2 to the first free end after detecting that the charging current is less than the preset value (for example, but not limited to 12 amperes).

In step S708, the total charge current value of the charging pile is updated, and the charging pile is output according to the total charge current value.

In an embodiment, the total charging current value I2 of the charging pile may be updated according to the total number of battery modules currently connected to the charging pile circuit (including the first charging circuit and the second charging circuit) and the minimum value of the battery module request current connected to the charging pile circuit, i.e. i2=the minimum value of the battery module request current connected to the charging pile circuit.

For example, when it is determined in step S705 that the battery module has reached the full charge state and the full charge battery module is disconnected from the first charging circuit, the number of battery modules connected to the first charging circuit is reduced, and the updated total charge current value of the charging pile is also reduced.

In step S709, it is determined whether all the battery modules reach a full charge state; if yes, go to step S710; if not, step S705 is performed.

In step S710, the charging mode is exited.

In an embodiment, if all the battery modules reach the full charge state, the charging may be stopped, the connection between all the battery modules and the charging post may be disconnected, and the charging mode may be exited.

Fig. 8 is a schematic structural diagram of a charge control device according to an embodiment of the present application. The charging control device may be a single controller or a collection of a plurality of controllers. Referring to fig. 8, the charge control device 800 includes at least one memory 820 and at least one processor 840.

The at least one processor 840 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The at least one memory 820 may include various types of storage units such as system memory, read Only Memory (ROM), and persistent storage. Where the ROM may store static data or instructions required by the processor 840 or other modules of the computer. The persistent storage may be a readable and writable storage. The persistent storage may be a non-volatile memory device that does not lose stored instructions and data even after the computer is powered down. In some embodiments, the persistent storage device employs a mass storage device (e.g., magnetic or optical disk, flash memory) as the persistent storage device. In other embodiments, the persistent storage may be a removable storage device (e.g., diskette, optical drive). The system memory may be a read-write memory device or a volatile read-write memory device, such as dynamic random access memory. The system memory may store instructions and data that are required by some or all of the processors at runtime. Furthermore, memory 820 may include any combination of computer-readable storage media including various types of semiconductor memory chips (e.g., DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), magnetic disks, and/or optical disks may also be employed. In some implementations, memory 820 may include a readable and/or writable removable storage device such as a Compact Disc (CD), a digital versatile disc read only (e.g., DVD-ROM, dual layer DVD-ROM), a blu-ray read only disc, an ultra-dense disc, a flash memory card (e.g., SD card, min SD card, micro-SD card, etc.), a magnetic floppy disk, and the like. The computer readable storage medium does not contain a carrier wave or an instantaneous electronic signal transmitted by wireless or wired transmission.

At least one memory 820 has stored thereon executable code that, when processed by at least one processor 840, can cause at least one processor 840 to perform some or all of the methods described above.

Furthermore, the method according to the present application may also be implemented as a computer program or computer program product comprising computer program code instructions for performing part or all of the steps of the above-described method of the present application.

Alternatively, the present application may also be embodied as a computer-readable storage medium (or non-transitory machine-readable storage medium or machine-readable storage medium) having stored thereon executable code (or a computer program or computer instruction code) which, when executed by a processor of an electronic device (or a server, etc.), causes the processor to perform part or all of the steps of the above-described methods according to the present application.

The embodiments of the present application have been described above, the foregoing description is exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A charging control method, characterized by comprising:

wherein each battery module selectively connects the corresponding battery module to a first charging circuit or a second charging circuit through one switch in a switching circuit, wherein the switching circuit comprises a plurality of switches;

the first charging circuit comprises a charging pile, the charging pile is connected with the switching circuit, the second charging circuit comprises a voltage conversion device, the voltage conversion device is connected with the switching circuit, the voltage conversion device comprises an input end anode, an input end cathode, an output end anode and an output end cathode, the input end cathode and the output end cathode of the voltage conversion device are connected with the cathode connecting end of the battery module, and the input end anode and the output end anode of the voltage conversion device are connected with the free end of the switch.

2. The method according to claim 1, characterized in that:

further comprises: determining a third battery module group from the plurality of battery modules, wherein the electric quantity of the battery modules in the third battery module group is higher than the electric quantity of the battery modules in the second battery module group;

3. The method of claim 2, wherein, in the case where the second battery module group meets a preset condition, the step of allowing the second battery module group to access the first charging circuit to continue charging includes:

4. The method of claim 1, wherein said enabling the second battery module group to be charged in a second charging circuit comprises:

5. The method of claim 4, wherein the enabling the second battery module group to be connected to the first charging circuit to continue charging if the second battery module group meets a preset condition comprises:

6. The method of any one of claims 1-5, further comprising:

7. The method as recited in claim 1, further comprising:

determining a second charging circuit composition mode;

8. A charge control device, characterized by comprising:

at least one processor; and

at least one memory having executable code stored thereon, which when executed by the at least one processor, causes the at least one processor to perform the method of any of claims 1-7.

9. A charging system, comprising:

the switch circuit comprises a plurality of switches, is correspondingly connected with the plurality of battery module interface groups and is used for selectively connecting the corresponding battery module into the first charging circuit or the second charging circuit through one switch;

wherein:

The second charging circuit comprises a voltage conversion device, the voltage conversion device is connected with the switching circuit and the charging control device, the voltage conversion device comprises an input end anode, an input end cathode, an output end anode and an output end cathode, the input end cathode and the output end cathode of the voltage conversion device are connected with the cathode connecting end of the battery module interface group, and the input end anode and the output end anode of the voltage conversion device are connected with the free end of the switch.

10. The charging system of claim 9, wherein the battery is electrically connected to the battery,

wherein:

11. The charging system of claim 9, further comprising:

12. Charging device for an electric aircraft, characterized by a charging system according to any one of claims 9 to 11.