Nothing Special   »   [go: up one dir, main page]

CN116345622A - Switch tube protection method, battery pack and energy storage system - Google Patents

Switch tube protection method, battery pack and energy storage system Download PDF

Info

Publication number
CN116345622A
CN116345622A CN202310298445.1A CN202310298445A CN116345622A CN 116345622 A CN116345622 A CN 116345622A CN 202310298445 A CN202310298445 A CN 202310298445A CN 116345622 A CN116345622 A CN 116345622A
Authority
CN
China
Prior art keywords
switching tube
switch tube
tube
discharging
charging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310298445.1A
Other languages
Chinese (zh)
Inventor
于扬鑫
陈玉光
童文平
郑锐畅
陈熙
王雷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ecoflow Technology Ltd
Original Assignee
Ecoflow Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ecoflow Technology Ltd filed Critical Ecoflow Technology Ltd
Priority to CN202310298445.1A priority Critical patent/CN116345622A/en
Publication of CN116345622A publication Critical patent/CN116345622A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/512—Connection only in parallel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J15/00—Systems for storing electric energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application provides a switch tube protection method, a battery pack and an energy storage system. The battery pack comprises an energy storage battery, a charging switch tube and a discharging switch tube. The switch tube protection method comprises the following steps: monitoring working states of a charging switch tube and a discharging switch tube, wherein the working states comprise a switching state of the charging switch tube, a switching state of the discharging switch tube and charging and discharging currents of a battery pack; the switch state includes an on state and an off state; when the working states of the charging switch tube and the discharging switch tube meet error conditions, the charging switch tube and the discharging switch tube are controlled to be in an off state, wherein the error conditions comprise: and in the first preset time period, the charging switch tube and the discharging switch tube are in different switch states, and the charging and discharging current is larger than a preset current threshold value. The switch tube protection method can reduce the probability of burning out the switch tube due to high temperature and improve the safety of the battery pack.

Description

Switch tube protection method, battery pack and energy storage system
Technical Field
The application relates to the technical field of batteries, in particular to a switch tube protection method of a battery pack, the battery pack and an energy storage system.
Background
When a parallel operation system is formed by a plurality of battery packs for parallel operation charge and discharge, it is often necessary to switch charge or discharge between the plurality of battery packs, and for seamless switching, it is necessary to control the corresponding charge switch tube and discharge switch tube of each battery pack to be turned on or off. For each battery pack, in the switching process, the charging switch tube and the discharging switch tube are often turned on or off at different time, namely, one switch tube is turned on, and the other switch tube is turned off. At this time, the charge-discharge current flows through the body diode of the turned-off switching transistor. In order to protect the switching tube, the controller of the parallel operation system generally sends an instruction to instruct the switching tube which is turned off to be turned on so as to avoid the excessive temperature of the switching tube. However, in practical application, the switching tube may not be turned on according to the parallel operation system command, so that the switching tube is easy to burn out due to high temperature, thereby causing a certain threat to the safe use of the battery pack.
Disclosure of Invention
In view of the above, the present application provides a body diode protection method, a battery pack and an energy storage system to solve the above-mentioned problems.
The first aspect of the application provides a switch tube protection method of a battery pack, wherein the battery pack comprises an energy storage battery, a charging switch tube and a discharging switch tube. When the charging switch tube is disconnected and the discharging switch tube is conducted, the energy storage battery discharges through the body diode of the charging switch tube and the discharging switch tube; when the discharging switch tube is disconnected and the charging switch tube is conducted, the energy storage battery is charged through the body diode of the discharging switch tube and the charging switch tube; the protection method of the switch tube of the battery pack comprises the following steps: monitoring working states of a charging switch tube and a discharging switch tube, wherein the working states comprise a switching state of the charging switch tube, a switching state of the discharging switch tube and charging and discharging currents of a battery pack; the switch state includes an on state and an off state; when the working states of the charging switch tube and the discharging switch tube meet error conditions, the charging switch tube and the discharging switch tube are controlled to be in an off state, wherein the error conditions comprise: and in the first preset time period, the charging switch tube and the discharging switch tube are in different switch states, and the charging and discharging current is larger than a preset current threshold value.
Therefore, by monitoring the switching states of the charging switch tube and the discharging switch tube of the battery pack and the charging and discharging current of the battery pack, when the charging switch tube and the discharging switch tube are in different switching states and the charging and discharging current passes through a preset current threshold value, all the switch tubes are disconnected in time, and the charging and discharging loop of the battery pack is cut off, so that the current is prevented from flowing through the body diode on the switch tube which is in the disconnected state for a long time, the probability of burning out the switch tube due to high temperature is reduced, and the safety of the battery pack is improved.
In one embodiment, the switching tube protection method further comprises: when the working states of the charging switch tube and the discharging switch tube meet error conditions, setting an error mark of the first switch tube, and adding one to the error times of the first switch tube. When the first switching tube meets the error condition, the switching tube in the off state in the charging switching tube and the discharging switching tube. The error mark indicates that the switching tube is in error when set, and indicates that the switching tube is not in error when reset. Therefore, the number of times of errors of the first switching tube can be counted.
In one embodiment, the state further includes temperatures of the charge switching tube and the discharge switching tube, and the switching tube protection method further includes: and resetting the error mark of the first switch tube when the work of the charging switch tube and the discharging switch tube meets the recovery condition. Wherein the recovery conditions include: and in the second preset time period, the work of the charging switch tube and the discharging switch tube simultaneously meets the first condition and the second condition. The first condition comprises that the temperature of the first switching tube is smaller than a preset temperature threshold value and the error frequency of the first switching tube is smaller than a preset frequency; the second condition comprises that the first switching tube is conducted or the second switching tube is disconnected or the charging and discharging current is smaller than a preset current threshold value, wherein the second switching tube is the other switching tube except the first switching tube in the charging switching tube and the discharging switching tube. Therefore, when the working states of the charging switch tube and the discharging switch tube meet the recovery condition, namely the temperatures of the charging switch tube and the discharging switch tube are reduced to a safe range, the burning risk is small, and when the large current is not needed to be resisted, the error identification of the first switch tube can be reset.
In one embodiment, the switching tube protection method further comprises: and after the error mark of the first switching tube is reset, controlling the second switching tube to be conducted. Therefore, after the error mark of the first switching tube is reset, the second switching tube is controlled to be conducted, so that the current battery pack is re-participated in parallel charging and discharging.
In one embodiment, before controlling the second switching tube to be turned on, the switching tube protection method further includes: monitoring whether the battery pack has an error; and when the battery pack has no error, controlling the second switching tube to be conducted. Therefore, the probability of burning out the switching tube due to other errors of the battery pack can be further reduced, and the safety of the battery pack is improved.
In one embodiment, the switching tube protection method further comprises: and when the error times of the first switching tube are larger than or equal to the preset times, prohibiting resetting the error identification of the first switching tube. Therefore, the error mark of the first switching tube is forbidden to be reset, so that the first switching tube is forced to keep an off state, no current flows through the diode on the first switching tube, and the temperature of the first switching tube is reduced to a safe range.
In one embodiment, when the switching tube protection method further comprises: after setting the error mark of the first switching tube each time, starting timing; when the error times of the first switching tube are larger than or equal to the preset times and the timing is larger than or equal to the third preset time length, the error times are cleared. Therefore, the first switching tube can be forced to cool within the third preset time period, and the error times can not be cleared until the temperature of the first switching tube is reduced to be within the safe temperature range, so that the first switching tube can resist heavy current again.
In one embodiment, the switching tube protection method further comprises: when the number of errors of the first switching tube is smaller than the preset number of errors and is larger than or equal to a fourth preset duration, the number of errors is cleared, wherein the fourth preset duration is smaller than the third preset duration. Therefore, when the number of times of the first switching tube for resisting the heavy current is smaller than the preset number of times, the error number can be cleared after the fourth preset time length, and the probability of continuous error reporting caused by misjudgment due to accidental errors in a long time is reduced.
The second aspect of the application provides a battery pack, the battery pack comprises a controller, an energy storage battery, a charging switch tube and a discharging switch tube, and the controller is connected with the charging switch tube, the discharging switch tube and the battery. The controller is configured to perform the switching tube protection method according to any one of the above.
A third aspect of the present application provides an energy storage system comprising at least two battery packs as described above, the at least two battery packs being connected in parallel.
According to the body diode protection method, through monitoring the switching states of the charging switch tube and the discharging switch tube on the battery pack and the charging and discharging current of the battery pack, when the charging switch tube and the discharging switch tube are in different switching states and the charging and discharging current exceeds the preset current threshold value, all the switch tubes are disconnected in time, and the charging and discharging loop of the battery pack is cut off, so that the current is prevented from flowing through the body diode on the switch tube in the disconnected state for a long time, the probability of burning out of the switch tube due to high temperature is reduced, and the safety of the battery pack is improved.
Drawings
Fig. 1 is a schematic diagram of an implementation environment of a switch tube protection method according to an embodiment of the present application.
Fig. 2 is a schematic circuit diagram of a multi-battery pack connection in a multi-battery pack system according to an embodiment of the present application.
Fig. 3 is a flow chart of a switch tube protection method according to an embodiment of the present application.
Fig. 4 is a flow chart of a switch tube protection method according to another embodiment of the present application.
Fig. 5 is a flowchart of a switch tube protection method after performing step S310 according to another embodiment of the present application.
Fig. 6 is a flowchart of a switch tube protection method after performing step S430 according to another embodiment of the present application.
Fig. 7 is a block diagram of a battery pack according to an embodiment of the present application.
Fig. 8 is a block diagram of an energy storage system according to an embodiment of the present disclosure.
Fig. 9 is a block diagram of a switch tube protection device according to an embodiment of the present application.
Description of the main reference signs
A. B, 101-battery pack P+ -positive terminal P+ -negative terminal a, B-energy storage battery Q1, 1013-charging switch tube Q2, 1014-discharging switch tube 10-multi-battery pack system 20-power conversion device 30-power supply 40-load
1011-controller 1012-energy storage battery 1000-energy storage system 2000-switching tube protecting device 2100-monitoring module 2200-control module
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments.
It is noted that when one component is considered to be "connected" to another component, it may be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed" on another element, it can be directly on the other element or intervening elements may also be present. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "rear," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Some embodiments will be described below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
With the development of electronic technology and the popularization of electronic devices, the demand of users for electric energy is increasing. In order to meet the electricity demand of users, for example, a plurality of battery packs can be connected in parallel on the energy storage device through the parallel connection port so as to form a parallel connection system for charging and discharging, thereby expanding the electric quantity of the energy storage device.
For another example, referring to fig. 1, fig. 1 is a schematic diagram of a power supply system. In the power supply system, the multi-battery pack system 10, the power supply 30, and the load 40 are all electrically connected to the power conversion device 20. The power conversion device 20 may perform AC-DC conversion (alternating current to direct current), DC-AC conversion (direct current to alternating current), and DC-DC (direct current to direct current) functions. The multi-battery pack system 10 may be charged by receiving the electric power outputted from the power supply 30 through the power conversion apparatus 20; the multi-battery pack system 10 may also be discharged through the power conversion device 20 to power the load 30. Wherein the multi-battery pack system 10 includes a plurality of battery packs 101. In this manner, the parallel operation system formed by the multi-cell pack system 10 can store or release more electrical energy.
With continued reference to fig. 2, fig. 2 is a schematic diagram illustrating a portion of the circuit connection between the multi-battery pack system 10 and the power conversion device 20 shown in fig. 1. The multi-battery pack system 10 includes two battery packs, such as a battery pack a and a battery pack B. The positive terminal p+ and the negative terminal P-are connection ports of the power conversion device 20 and the multi-battery pack system 10 shown in fig. 1. Specifically, the output positive electrodes of the battery pack a and the battery pack B are commonly connected to the positive electrode terminal p+ of the power conversion device 20, and the output negative electrode B-of the battery pack a and the battery pack B are commonly connected to the negative electrode terminal P-of the power conversion device 20, thereby realizing parallel connection of the battery pack a and the battery pack B. In this manner, the multi-battery pack system 10 discharges or receives charge to the outside through the positive terminal p+ and the negative terminal P-of the power conversion device 20.
Further, each of the battery packs a and B includes an energy storage battery (battery a or B shown in the figure), a charge switching tube Q1 and a discharge switching tube Q2. Taking the battery pack a as an example, the charge switching tube Q1 and the discharge switching tube Q2 may be located between the output positive electrode and the positive electrode terminal p+ of the battery pack a. The drain electrode of the charging switch tube Q1 is electrically connected to the positive terminal p+ of the energy storage device, the source electrode of the charging switch tube Q1 is electrically connected to the source electrode of the discharging switch tube Q2, the drain electrode of the discharging switch tube Q2 is electrically connected to the output positive electrode of the energy storage battery a, and the gate electrode of the charging switch tube Q1 and the gate electrode of the discharging switch tube Q2 are respectively used as control ends of corresponding switch tubes for controlling the on or off of the switch tubes.
It will be appreciated that the charge switching tube Q1 and the discharge switching tube Q2 shown in fig. 1 are located on the positive output side circuit of the battery pack a, and in other embodiments, the charge switching tube Q1 and the discharge switching tube Q2 may be located on the negative output side circuit of the battery pack a. The connection relationship between the charge switching tube Q1 and the discharge switching tube Q2 in the battery pack B is substantially the same as or similar to the connection relationship between the charge switching tube Q1 and the discharge switching tube Q2 in the battery pack a, and will not be described here again. When a plurality of battery packs are charged and discharged in parallel, it is often necessary to switch charging or discharging between the plurality of battery packs, and in order to avoid power failure on the load side during switching, it is necessary to control the charge switching tube Q1 and the discharge switching tube Q2 corresponding to each battery pack to be turned on or off. Thus, for each battery pack, in the switching process, the charge switching tube Q1 and the discharge switching tube Q2 are often turned on or off at different times, that is, one switching tube is turned on and the other switching tube is turned off. At this time, the charge and discharge current of the battery pack flows through the body diode of the turned-off switching tube. In order to protect the switching tube, the controller of the parallel operation system generally sends an instruction to instruct the switching tube which is turned off to be turned on so as to avoid the excessive temperature of the switching tube. However, in practical application, the switching tube may not be turned on according to the parallel operation system command, so that the switching tube is easy to burn out due to high temperature, thereby causing a certain threat to the safe use of the battery pack.
Therefore, it is necessary to provide a protection method for the switch tube of the battery pack, so as to reduce the probability of burning the switch tube and improve the safety of the battery pack.
Referring to fig. 3, fig. 3 is a flowchart illustrating a method for protecting a switch tube of a battery pack according to an embodiment of the present disclosure. In this application, a case where the switching tube protection method is applied to the battery pack a shown in fig. 1 will be described as an example. Referring to fig. 2, the battery pack a further includes a controller. The switching tube protection method is executed by a controller. It will be appreciated that in some embodiments, the controller is loaded with a battery management system BMS (Battery Management System) (not shown) for protecting and managing the battery pack a, and the switching tube protection method provided herein is performed by the BMS within the controller.
Specifically, the switch tube protection method provided by the application may include the following steps S310 to S320. The respective steps are described below.
Step S310: the operating state of the charge switching tube Q1 and the discharge switching tube Q2 is monitored.
The working states of the charging switch tube Q1 and the discharging switch tube Q2 include: the switching state of the charge switching tube Q1, the switching state of the discharge switching tube Q2, and the charge-discharge current of the battery pack.
Specifically, the switching states include an on state and an off state. Referring to fig. 1 again, in the embodiment of the present application, the switching states of the charge switch tube Q1 and the discharge switch tube Q2 can be monitored by monitoring the voltages of the ports (e.g. the gate and the source) of the charge switch tube Q1 and the discharge switch tube Q2, respectively.
Further, when the charging switch tube Q1 is turned off and the discharging switch tube Q2 is turned on, the energy storage battery a can be discharged through the body diode D1 of the charging switch tube Q1 and the discharging switch tube Q2; when the discharge switching tube Q2 is turned off and the charge switching tube Q1 is turned on, the energy storage battery a can be charged through the body diode D2 of the discharge switching tube Q2 and the charge switching tube Q1. In this way, even when the charge switching tube Q1 and the discharge switching tube Q2 are in different switching states, the battery pack a still has a charge-discharge current, which may be either a charge current or a discharge current or even a rest current. In some scenarios, due to sampling errors, even if energy storage battery a is in a rest state that is neither discharged nor charged, it may have very little rest current.
Step S320: when the working states of the charge switching tube Q1 and the discharge switching tube Q2 meet the error condition, the charge switching tube Q1 and the discharge switching tube Q2 are controlled to be in the off state.
Wherein the error condition comprises: in the first preset time period, the charging switch tube Q1 and the discharging switch tube Q2 are in different switch states, and the charging and discharging current is larger than a preset current threshold.
It can be understood that, when the current value of the charge/discharge current is larger, the power generated by the charge/discharge current is larger and the heating value is larger as time increases, so that the temperatures of the charge switch tube Q1 and the discharge switch tube Q2 may be increased, and the risk of burning the charge switch tube Q1 and the discharge switch tube Q2 may be increased. Particularly, when the charge switching tube Q1 and the discharge switching tube Q2 are in different switching states, with the increase of real-time current, the body diode on the switching tube in the off state is in a state of resisting large current, so that the diode is easier to burn out, and at the moment, the charge switching tube Q1 and the discharge switching tube Q2 can be disconnected to disconnect the charge and discharge loop, so that the battery pack a is withdrawn and charged and discharged, and the state of resisting the large current of the diode is relieved, thereby reducing the burning risk of the switching tube.
In this way, step S320 monitors the switching state of the charge switching tube Q1, the switching state of the discharge switching tube Q2, and the charge-discharge current of the battery pack, so as to monitor the damage risk of the charge switching tube Q1 and the discharge switching tube Q2. According to the switch tube protection method, through monitoring the switch states of the charging switch tube Q1 and the discharging switch tube Q2 of the battery pack and the charge and discharge current of the battery pack, when the charging switch tube Q1 and the discharging switch tube Q2 are in different switch states and the charge and discharge current exceeds the preset current threshold value, all the switch tubes are disconnected in time, the charge and discharge loop of the battery pack is cut off, so that the current is prevented from flowing through the body diode on the switch tube which is originally in the disconnected state for a long time, the probability of burning out the switch tube due to high temperature is reduced, and the safety of the battery pack is improved.
In the embodiment of the present application, the first preset duration may be 3S (seconds), and the preset current threshold is 1A (ampere). It is understood that the present application does not limit the first preset duration and the preset current threshold. In other embodiments, the values of the first preset duration and the preset current threshold may be adjusted according to the difference between the charge switch tube Q1 and the discharge switch tube Q2, or the difference between the energy storage batteries.
With continued reference to fig. 4, in some embodiments, the switch tube protection method includes steps S410-S430. Step S410 and step S420 are the same as step S310 and step S320, and are not described here again. Wherein, step S430 is:
step S430: setting an error mark of the first switching tube when the working states of the charging switching tube Q1 and the discharging switching tube Q2 meet error conditions; the number of errors of the first switching tube is increased by one.
When the first switching tube meets the error condition, the switching tube in the off state is in the charging switching tube Q1 and the discharging switching tube Q2. The error identifier is used for indicating that the corresponding switching tube is in error when set and indicating that the corresponding switching tube is not in error when reset. It will be appreciated that the error identification may be integer data including a predetermined number of bits stored in a memory coupled to the controller. For example, in the embodiment of the present application, error flags are set in the memory corresponding to the charge switching tube Q1 and the discharge switching tube Q2, respectively. And the error identification may be binary data having one bit. Wherein, when the error flag is set, the error flag is 1; when the error flag is reset, the error flag is 0.
For example, the working principle of the method is described below by taking a case where the battery pack a is in a discharge state as an example, and combining the steps of the switching tube protection method provided in the present application.
When the charge switching tube Q1 is in an off state and the discharge switching tube Q2 is in an on state, the error condition is satisfied, and then the charge switching tube Q1 is the first switching tube. Thus, in step S430, the error flag of the first switching tube, that is, the error flag of the charging switching tube Q1 is set, so that the error flag corresponding to the charging switching tube Q1 is set to 1. At this time, in step S430, the number of errors of the charge switching transistor Q1 is counted by +1. In this way, when the charge switch tube Q1 is in the off state again and the discharge switch tube Q2 is in the on state, the error number of the charge switch tube Q1 is increased by one again, so that the current error number of the charge switch tube Q1, that is, the number of times that the charge switch tube Q1 resists heavy current, can be counted.
It will be understood that if, at the next execution of step S430, the battery pack a is in the charged state, and when the charge switch tube Q1 is in the on state and the discharge switch tube Q2 is in the off state, the error condition is satisfied, the first switch tube is the discharge switch tube Q2, then the error flag of the discharge switch tube Q2 is set to 1, and the number of errors of the discharge switch tube Q2 is increased by one, thereby obtaining the current number of errors of the discharge switch tube Q2.
With continued reference to fig. 5, in some embodiments, the switching tube protection method further includes:
step S510: the operating state of the charge switching tube Q1 and the discharge switching tube Q2 is monitored.
It should be understood that the step S510 is substantially the same as or similar to the step S310, and is not described herein, please refer to the step S310.
Step S520: when the working states of the charging switch tube Q1 and the discharging switch tube Q2 meet the recovery condition, the error identification of the first switch tube is reset. Wherein the recovery conditions include: and in the second preset time period, the working states of the charging switch tube Q1 and the discharging switch tube Q2 simultaneously meet the first condition and the second condition.
Specifically, the working state in step S510 further includes temperatures of the charge switching tube Q1 and the discharge switching tube Q2; the first condition comprises that the temperature of the first switching tube is smaller than a preset temperature threshold value and the error frequency of the first switching tube is smaller than a preset frequency; the second condition includes that the first switching tube is conducted or the second switching tube is disconnected, or the real-time current is smaller than a preset current threshold. The second switching tube is the other switching tube except the first switching tube in the charging switching tube Q1 and the discharging switching tube Q2.
Through a great number of tests, the application finds that when the temperature of the switching tube (for example, the discharging switching tube Q2) drops below a preset temperature threshold value, even if the switching tube resists a larger current (for example, 130A) in a first preset time period, the temperature of the switching tube cannot reach a high-temperature protection temperature threshold value, for example, 90 ℃; when the temperature of the switching tube is greater than the preset temperature threshold, if the switching tube resists a larger current (for example 130A) at the moment, the temperature of the switching tube is more likely to reach the high-temperature protection temperature threshold immediately, and the probability of burning the body diode is greatly improved.
Taking the case when the battery pack a is in the discharging state as an example, the first switch tube is the charging switch tube Q1 at this time, in step S520, when the temperature of the charging switch tube Q1 is less than the preset temperature threshold, it is indicated that the temperature of the charging switch tube Q1 falls to the safe range, if the error flag of the charging switch tube Q1 is reset at this time, since the temperature of the charging switch tube Q1 has fallen to the safe range, even if a larger discharging current occurs immediately, the larger discharging current can be resisted within the first preset time period, and the high temperature protection temperature threshold is not reached immediately, resulting in burning of the body diode.
It will be appreciated that as the number of times that the charge switch Q1 continuously withstands a large current increases, if there is no period of time for the charge switch Q1 to decrease in temperature, the temperature of the charge switch Q1 and the diodes thereon will also gradually rise, increasing the risk of burnout. Therefore, when the number of errors of the charge switch Q1 reaches a preset number, that is, the number of times that the charge switch Q1 continuously withstands a large current reaches a preset number of times, the charge switch Q1 needs to be controlled to maintain an off state, so that no current flows through the charge switch Q1, and the temperature is reduced, so that the error flag is not allowed to be reset at this time. Otherwise, when the number of errors is smaller than the preset number of errors, the error identification can be allowed to be reset as long as the temperature of the charging switch tube Q1 is smaller than the preset temperature threshold.
In this way, when the charging switch tube Q1 meets the first condition (the temperature of the first switch tube is less than the preset temperature threshold and the number of errors of the first switch tube is less than the preset number of times) within the second preset time period, it is indicated that the current temperature of the charging switch tube Q1 is still within the safety range, and the risk of burning is small.
It can be understood that when the charge switching tube Q1 is turned on, even if there is a discharge current, the discharge current is output to the load side through the charge switching tube Q1, so that the diode on the charge switching tube Q1 does not need to resist a large current, and the burning risk is low. After the discharging switch tube Q2 (second switch tube) is turned off, the battery pack a cannot discharge to the outside, at this time, there is no discharging current flowing through the charging switch tube Q1, and there is no risk of burning out, so that the false flag can be allowed to be reset.
When the discharge current is less than the preset current threshold, it is indicated that no large current is currently needed, and at this time, the false flag reset may be allowed as well.
In this way, when the charging switch Q1 meets the second condition (the first switch is turned on or the second switch is turned off, or the real-time current is less than the preset current threshold) within the second preset time period, it is indicated that the charging switch Q1 and the diode thereon do not need to resist the large current.
Therefore, in the second preset time period, when the working states of the charging switch tube Q1 and the discharging switch tube Q2 simultaneously meet the first condition and the second condition, it is indicated that the temperatures of the charging switch tube Q1 and the discharging switch tube Q2 are in the safe range, the burning risk is small, and the error identification of the charging switch tube Q1 can be reset without resisting large current.
It is understood that in step S520, when the number of errors of the first switching tube is greater than or equal to the preset number, resetting the error flag of the first switching tube is prohibited. Therefore, when the number of errors of the first switching tube in step S520 is greater than or equal to the preset number, that is, the number of times that the diode on the first switching tube resists the large current is greater than or equal to the preset number, the error flag of the first switching tube is inhibited from being reset to force the first switching tube to maintain the off state, so that no current flows through the diode on the first switching tube, and the temperature of the first switching tube is reduced to the safe range.
In some embodiments, the second preset time period in step S520 may be 60S (seconds); the preset temperature threshold may be 75 degrees celsius; the preset number of times may be 3 times. The second preset time length, the preset temperature threshold value and the preset times are not limited, and specific numerical values of the second preset time length, the preset temperature threshold value and the preset times can be adjusted by a person skilled in the art according to actual use scenes.
It can be understood that when the battery pack a is in a charging state, the first switching tube is a discharging switching tube Q2, and the second switching tube is a charging switching tube Q1, and the working principle is similar to that of the battery pack a in a discharging state, which is not repeated herein.
Step S530: and after the error mark of the first switching tube is reset, controlling the second switching tube to be conducted.
When the battery pack A is in a discharging state, the first switching tube is a charging switching tube Q1, and the second switching tube is a discharging switching tube Q2. After the error identification of the charging switch tube Q1 is reset, the fact that the body diode of the charging switch tube Q1 can resist large current at the moment is indicated, or the charging switch tube Q1 does not need to resist large current by the body diode, at the moment, the discharging switch tube Q2 is controlled to be conducted, the discharging capability of the battery pack A can be restored, and the current battery pack A can participate in parallel charging and discharging again.
When the battery pack A is in a charging state, the first switching tube is a discharging switching tube Q2, and the second switching tube is a charging switching tube Q1. After the error identification of the discharging switch tube Q2 is reset, the fact that the body diode of the discharging switch tube Q2 can resist large current at the moment is indicated, or the discharging switch tube Q2 does not need to resist large current by the body diode, at the moment, the charging switch tube Q1 is controlled to be conducted, the charging capability of the battery pack A can be restored, and the current battery pack A is enabled to participate in parallel charging and discharging again.
In some embodiments, before performing step S530, the switching tube protection method further includes:
monitoring whether the battery pack has an error;
and when the battery pack has no error, controlling the second switching tube to be conducted.
Thus, in addition to considering whether the switching tube itself has an error, it is necessary to turn on the second switching tube to consider whether the battery pack has an error at present, if the battery pack itself has an error, for example, the temperature is too high, too low, or is under-voltage, over-voltage, etc., and the battery pack should not be allowed to charge or discharge (over-voltage does not allow charging, under-voltage does not allow discharging). Therefore, the second switching tube is controlled to be conducted when the battery pack does not have errors, so that the probability of burning out the switching tube due to other errors of the battery pack can be further reduced, and the safety of the battery pack is improved.
Referring to fig. 6, in some embodiments, after performing step S520, the switching tube protection method further includes:
step S610: and starting timing after setting the error identification of the first switching tube each time.
Step S620: when the error times of the first switching tube are larger than or equal to the preset times and the timing is larger than or equal to the third preset time length, the error times are cleared.
Therefore, when the number of errors of the first switching tube is greater than or equal to the preset number, namely, after the number of times of the first switching tube for resisting the heavy current reaches the preset number of times, the first switching tube can be forced to cool in a third preset time period, and the number of errors is cleared until the temperature of the first switching tube is reduced to be within a safe temperature range, so that the first switching tube can resist the heavy current again.
In some embodiments, the third preset time period may be 30 minutes.
In some embodiments, after performing step S610, the method further includes the following steps:
step S630: when the number of errors of the first switching tube is smaller than the preset number of times and the timing is larger than or equal to a fourth preset duration, resetting the number of errors, wherein the fourth preset duration is smaller than the third preset duration.
Therefore, when the number of errors of the first switching tube is smaller than the preset number, namely the number of times that the first switching tube resists large current is smaller than the preset number of times, the number of errors can be cleared after the fourth preset time length, and the probability of continuous error reporting caused by error judgment in a long time is reduced.
In some embodiments, the fourth preset time period may be 10 minutes.
It can be understood that in step S620 and step S630, the timing is restarted each time the number of errors changes, so as to improve the accuracy of the error clearing timing.
It will be appreciated that the operation of the switch tube protection method is described above by taking the case where the battery pack a is in a discharge state as an example. In other embodiments, when the battery pack a is in a charged state, the operation of the switch tube protection method is substantially the same or similar, and will not be described herein.
It will be appreciated that in other embodiments, the error conditions may also include: in another preset time period, the charging switch tube Q1 and the discharging switch tube Q2 are in a conducting state at the same time, and the real-time current is larger than another preset current threshold value. In this way, the risk of burning of the charge switching tube Q1 and the discharge switching tube Q2 can be further reduced.
Referring to fig. 7, the present application further provides a battery pack 101. The battery pack 101 includes a controller 1011, an energy storage battery 1012, a charge switch tube 1013, and a discharge switch tube 1014. The controller 1011 is connected to a charge switch tube 1013, a discharge switch tube 1014, and an energy storage battery 1012. The controller 110 is configured to perform the switching tube protection method as set forth in any one of the above. The energy storage battery 1012 may include, but is not limited to, a rechargeable battery such as a cadmium nickel battery, a hydrogen nickel battery, a lithium ion battery, a secondary alkaline zinc manganese battery, and the like, and the type of energy storage battery 1012 is not limited herein.
Referring to fig. 8, the present application further provides an energy storage system 1000. The energy storage system 1000 comprises at least two battery packs 101 as described above, at least two battery packs 101 being connected in parallel, i.e. connected to the same charge-discharge interface. Further, in the energy storage system 1000, a controller 1011 is integrated on each battery pack 101, which is a controller inside the battery pack, for executing the switch tube protection method according to the above embodiments of the present application.
It will be appreciated that the energy storage system 1000 further includes a controller loaded with a power management system (Energy Management System, power management system) for communicating with the BMS loaded within the controller 1011 of each of the battery packs 101 to manage the battery packs 101 in the energy storage system 1000. The BMS serves as a management unit inside each battery pack 101 for monitoring an operation state of each battery pack 101, directly controlling the battery pack 101 and communicating with the EMS, and receiving and executing various instructions issued by the EMS. The EMS serves as a management unit of the energy storage system for communicating with the BMSs of the respective battery packs to implement management of the respective battery packs.
It will be appreciated that in some embodiments, the controller of the energy storage system 1000 may also multiplex any of the controllers 1011 of the plurality of battery packs 101. At this time, the battery pack serves as a main battery pack, and the controller 1011 thereof is simultaneously loaded with the EMS and the BMS for performing the switching tube protection method of the above-described embodiments of the present application.
It is understood that the energy storage system 1000 may be a stand-alone power supply, and the power conversion device may be integrated inside the energy storage system 1000, so that the energy storage system 1000 may form a micro grid system with an external power supply, such as an ac power supply, a dc power supply. For example, the energy storage system 1000 may be a household large-sized battery, a portable outdoor power source, or the like.
The energy storage system 1000 may also be a power supply integrated in an electronic device. The product form of the electronic device is not limited, any electronic device including or requiring a battery can be integrated with the energy storage system 1000, and the switch tube protection method described in each embodiment can be implemented by an internal integrated or external access processor in the energy storage system 1000. For example, the electronic product integrated with the energy storage system 1000 may be a motor, an automobile, a motorcycle, a moped, a bicycle, a lighting fixture, a mobile robot, or the like.
The embodiment of the application also provides a switching tube protection device. Fig. 9 schematically shows a block diagram of a switching tube protection device according to an embodiment of the present application. As shown in fig. 7, the switching tube protecting device 2000 includes:
the monitoring module 2100 is used for monitoring the working states of the charging switch tube and the discharging switch tube on the battery pack. The working state comprises the switching state of the charging switch tube, the switching state of the discharging switch tube and the charging and discharging current of the battery pack. The switch states include an on state and an off state.
And the control module 2200 is used for controlling the charging switch tube and the discharging switch tube to be in an off state when the working states of the charging switch tube and the discharging switch tube meet error conditions. Wherein the error condition comprises: and in the first preset time period, the charging switch tube and the discharging switch tube are in different switch states, and the charging and discharging current is larger than a preset current threshold value.
Specific details of the switch tube protection device provided in the embodiments of the present application to implement the switch tube protection method have been described in detail in the embodiments of the corresponding switch tube protection method, and are not described herein again.
The embodiment of the application further provides a computer readable medium, on which a computer program is stored, which when being executed by a processor, implements a switching tube protection method as in the above technical scheme. The computer readable medium may take the form of a portable compact disc read only memory (CD-ROM) and include program code that can be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product described above may take the form of any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The computer readable signal medium may include a data signal propagated in baseband or as part of a carrier wave with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).
Furthermore, the above-described drawings are only schematic illustrations of processes included in the method according to the exemplary embodiment of the present invention, and are not intended to be limiting. It will be readily appreciated that the processes shown in the above figures do not indicate or limit the temporal order of these processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, for example, among a plurality of modules.
In addition, those of ordinary skill in the art will recognize that the above embodiments are presented for purposes of illustration only and are not intended to be limiting, and that suitable modifications and variations of the above embodiments are within the scope of the disclosure of the present application.

Claims (10)

1. The switch tube protection method of the battery pack is characterized in that the battery pack comprises an energy storage battery, a charging switch tube and a discharging switch tube, and when the charging switch tube is disconnected and the discharging switch tube is conducted, the energy storage battery discharges through a body diode of the charging switch tube and the discharging switch tube; when the discharging switch tube is disconnected and the charging switch tube is conducted, the energy storage battery is charged through the body diode of the discharging switch tube and the charging switch tube; the protection method of the switch tube of the battery pack comprises the following steps:
monitoring working states of the charging switch tube and the discharging switch tube, wherein the states comprise a switching state of the charging switch tube, a switching state of the discharging switch tube and charging and discharging currents of the battery pack; the switch state comprises an on state and an off state;
when the working states of the charging switch tube and the discharging switch tube meet error conditions, controlling the charging switch tube and the discharging switch tube to be in an off state;
wherein the error condition comprises: and in a first preset time period, the charging switch tube and the discharging switch tube are in different switch states, and the charging and discharging current is larger than a preset current threshold.
2. The switching tube protection method of claim 1, further comprising:
setting an error mark of a first switching tube when the working states of the charging switching tube and the discharging switching tube meet the error condition, and setting the switching tube in an off state in the charging switching tube and the discharging switching tube when the first switching tube meets the error condition; the error mark indicates that the switching tube is in error when set, and indicates that the switching tube is not in error when reset;
and adding one to the error times of the first switching tube.
3. The switching tube protecting method according to claim 2, wherein the operating state further includes temperatures of the charge switching tube and the discharge switching tube, the switching tube protecting method further comprising:
resetting the error mark of the first switching tube when the working states of the charging switching tube and the discharging switching tube meet the recovery condition;
wherein the recovery condition includes:
in a second preset time period, the working states of the charging switch tube and the discharging switch tube simultaneously meet a first condition and a second condition,
the first condition comprises that the temperature of the first switching tube is smaller than a preset temperature threshold value and the error frequency of the first switching tube is smaller than a preset frequency;
the second condition comprises that the first switching tube is conducted or the second switching tube is disconnected or the charging and discharging current is smaller than the preset current threshold, wherein the second switching tube is the other switching tube except the first switching tube in the charging switching tube and the discharging switching tube.
4. The switching tube protection method of claim 3, further comprising:
and after the error identification of the first switching tube is reset, controlling the second switching tube to be conducted.
5. The switching tube protecting method according to claim 4, wherein before said controlling the second switching tube to be turned on, the switching tube protecting method further comprises:
monitoring whether the battery pack has an error;
and when the battery pack has no error, controlling the second switching tube to be conducted.
6. The switching tube protection method of claim 3, further comprising:
and when the error times of the first switching tube are greater than or equal to the preset times, prohibiting resetting of the error identification of the first switching tube.
7. The switching tube protecting method as claimed in claim 3, wherein when the switching tube protecting method further comprises:
after setting the error identification of the first switching tube each time, starting timing;
when the error times of the first switching tube are larger than or equal to the preset times and the timing is larger than or equal to a third preset time length, the error times are cleared.
8. The switching tube protection method of claim 7, further comprising:
when the number of errors of the first switching tube is smaller than the preset number of times and the timing is larger than or equal to a fourth preset duration, resetting the number of errors, wherein the fourth preset duration is smaller than the third preset duration.
9. A battery pack comprising a controller, an energy storage battery, a charge switch tube and a discharge switch tube, the controller being connected to the charge switch tube, the discharge switch tube and the energy storage battery, wherein the controller is configured to perform the switch tube protection method of any one of claims 1-8.
10. An energy storage system comprising at least two battery packs according to claim 9, at least two of the battery packs being connected in parallel.
CN202310298445.1A 2023-03-15 2023-03-15 Switch tube protection method, battery pack and energy storage system Pending CN116345622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310298445.1A CN116345622A (en) 2023-03-15 2023-03-15 Switch tube protection method, battery pack and energy storage system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310298445.1A CN116345622A (en) 2023-03-15 2023-03-15 Switch tube protection method, battery pack and energy storage system

Publications (1)

Publication Number Publication Date
CN116345622A true CN116345622A (en) 2023-06-27

Family

ID=86875785

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310298445.1A Pending CN116345622A (en) 2023-03-15 2023-03-15 Switch tube protection method, battery pack and energy storage system

Country Status (1)

Country Link
CN (1) CN116345622A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117748690A (en) * 2024-02-19 2024-03-22 西安图为电气技术有限公司 Charging and discharging circuit of battery and charging and discharging method of battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117748690A (en) * 2024-02-19 2024-03-22 西安图为电气技术有限公司 Charging and discharging circuit of battery and charging and discharging method of battery
CN117748690B (en) * 2024-02-19 2024-05-24 西安图为电气技术有限公司 Charging and discharging circuit of battery and charging and discharging method of battery

Similar Documents

Publication Publication Date Title
CN100498366C (en) Apparatus and method for monitoring battery pack
EP2211441A2 (en) Secondary battery protection circuit
CN104638718A (en) Intelligent management system and method of electric vehicle battery
US9269989B2 (en) Electric power supply system
KR101612645B1 (en) Electricity storage device control system
JPWO2013042517A1 (en) Switch device and breaker control method
CN103855748A (en) Vehicle charging system and method
KR102284483B1 (en) Battery Module and Driving Method Thereof
KR20150040761A (en) Apparatus and method for having algorithm of malfunction prevention
KR102534561B1 (en) Charging and discharging device, battery charging and discharging method and charging and discharging system
CN103580096A (en) Systems and methods of direct cell attachment for batteries
US20220239140A1 (en) Charging method and power conversion apparatus
CN108832686B (en) Charging circuit and charging circuit detection method
CN117856384A (en) Control method and system for low-power logic threshold protection of energy storage system
CN116345622A (en) Switch tube protection method, battery pack and energy storage system
CN109586395B (en) Uninterrupted power supply intelligent switching and monitoring method
WO2024139742A1 (en) Battery cluster, energy storage system, uninterruptible power supply system, and electric vehicle
CN102263432A (en) Gush-surplus lithium battery storage battery
CN116846016A (en) Overvoltage protection method, energy storage device and battery pack
CN116565998A (en) Charging and discharging control method of battery pack, energy storage system and storage medium
CN108535657B (en) Unmanned aerial vehicle battery safety protection method and device thereof
KR20180049545A (en) Battery pack with multi-charging function and energy storage system considered extensibility of battery pack
CN211266509U (en) Battery charging and discharging protection device and battery
CN202435066U (en) Lithium-ion battery pack management system with two-way current limiting function
CN220896363U (en) Power distribution equipment and power distribution system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination