CN113311346B

CN113311346B - Battery cell early warning method and device, cloud platform and storage medium

Info

Publication number: CN113311346B
Application number: CN202110544387.7A
Authority: CN
Inventors: 沈强; 柳志民
Original assignee: Beijing CHJ Automobile Technology Co Ltd
Current assignee: Beijing CHJ Automobile Technology Co Ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2024-02-06
Anticipated expiration: 2041-05-19
Also published as: CN113311346A

Abstract

The disclosure relates to a battery cell early warning method, a battery cell early warning device, a cloud platform and a storage medium. The method comprises the following steps: respectively obtaining static self-discharge rates of all the battery cells in the single test battery cell and the battery to be detected before and after static preset time, wherein the single test battery cell comprises a battery cell carrying foreign matters and a battery cell not carrying the foreign matters; and determining an early warning result of the battery cells in the battery to be detected based on the static self-discharge rate of each battery cell in the battery to be detected and the static self-discharge rate of the battery cells in the single test. Through the technical scheme, before the battery flows into the market for use, the battery core of the battery is subjected to early warning analysis based on standard data so as to obtain an accurate early warning result, and further after-sales investigation is performed on the battery according to the early warning result, so that the potential safety hazard caused by the introduction of foreign matters into the battery in the use process of the battery is avoided.

Description

Battery cell early warning method and device, cloud platform and storage medium

Technical Field

The disclosure relates to the technical field of battery diagnosis, in particular to a battery cell early warning method, a battery cell early warning device, a cloud platform and a storage medium.

Background

In recent years, electric automobiles or electric bicycles generally rely on an on-vehicle battery to supply power thereto. The electric vehicle is rapid in damage, and potential safety hazards are easy to exist, especially the battery of the electric vehicle.

The in-vehicle battery of an electric vehicle may introduce minute foreign matters during the manufacturing process. Although the battery has quality detection before leaving the factory and the battery which is qualified in detection flows into the market for use, tiny foreign matters can still exist in the battery which is qualified in detection. If the electric vehicle uses a battery carrying foreign matters, the electric vehicle can have great risks in the use process, and huge potential safety hazards are brought to drivers and passengers.

Disclosure of Invention

In order to solve the technical problems or at least partially solve the technical problems, the disclosure provides a battery cell early warning method, a device, a cloud platform and a storage medium, so as to realize early warning analysis on a battery cell in a battery before the battery is used and eliminate potential safety hazards in the use process of the battery.

The disclosure provides a battery cell early warning method, which comprises the following steps:

respectively obtaining static self-discharge rates of all the battery cells in the single test battery cell and the battery to be detected before and after static preset time, wherein the single test battery cell comprises a battery cell carrying foreign matters and a battery cell not carrying the foreign matters;

and determining an early warning result of the battery cells in the battery to be detected based on the static self-discharge rate of each battery cell in the battery to be detected and the static self-discharge rate of the single test battery cell.

Optionally, the self-discharge rate includes a first self-discharge rate of the battery cell after full charge and before and after the preset time period, and/or a second self-discharge rate of the battery cell after discharge under a specific working condition and before and after the preset time period.

Optionally, the determining the early warning result of the battery cell in the battery to be detected based on the standing self-discharge rate of each battery cell in the battery to be detected and the standing self-discharge rate of the battery cell in the single test includes:

comparing the static self-discharge rate of each cell in the battery to be detected with the static self-discharge rate of the cell carrying the foreign matters and the cell not carrying the foreign matters respectively, and obtaining a comparison result of the static self-discharge rate;

and determining an early warning result of the battery cell in the battery to be detected based on the comparison result of the standing self-discharge rate.

determining risk level intervals based on the standing self-discharge rate of the battery cells carrying the foreign matters and the battery cells not carrying the foreign matters, wherein each risk level interval corresponds to a risk level and prompt information;

And determining a target risk level interval in which each cell of the battery to be detected is positioned, and determining a target risk level and target prompt information corresponding to the target risk level interval.

Optionally, the determining the target risk level interval where each cell of the battery to be detected is located includes:

and under the condition that the standing self-discharge rate comprises a first standing self-discharge rate and a second standing self-discharge rate, if a first risk level interval determined based on the first standing self-discharge rate is not equal to a second risk level interval determined based on the second standing self-discharge rate, taking the risk level interval of a high level as a target risk level interval where each cell is located.

and under the condition that the standing self-discharge rate comprises a first standing self-discharge rate and a second standing self-discharge rate, if a first risk level interval determined based on the first standing self-discharge rate is not equal to a second risk level interval determined based on the second standing self-discharge rate, taking an interval average value of the first risk level interval and the second risk level interval as a target risk level interval where each cell is located.

Optionally, the method further comprises: further comprises:

and respectively acquiring the temperature rise values of the single test battery cell and each battery cell of the battery to be detected.

comparing the temperature rise value of the single test battery cell with the temperature rise value of each battery cell of the battery to be detected to obtain a comparison result of the temperature rise values;

and determining an early warning result of the battery cell in the battery to be detected based on the comparison result of the standing self-discharge rate and the comparison result of the temperature rise value.

Optionally, the determining the early warning result of the battery cell in the battery to be detected based on the comparison result of the standing self-discharge rate and the comparison result of the temperature rise value includes:

determining whether an abnormal battery core exists in the battery to be detected or not based on a comparison result of the standing self-discharge rate;

If the abnormal battery cells exist in the battery to be detected, determining the safety early warning level of the abnormal battery cells in the battery to be detected and prompt information corresponding to the safety early warning level based on the comparison result of the temperature rise values.

Optionally, the temperature rise value includes a first temperature rise value before and after the battery cell is fully charged, and/or a second temperature rise value before and after the battery cell is discharged under a specific working condition.

Optionally, working conditions of each cell in the battery to be detected and the single test cell are the same, and the working conditions include: at least one of standing time, ambient temperature, discharge working condition and detection times of the battery cell.

The present disclosure provides a cell early warning device, the device includes:

the static self-discharge rate acquisition module is used for respectively acquiring static self-discharge rates of each battery core in the single test battery core and the battery to be detected before and after static preset time, wherein the single test battery core comprises a battery core carrying foreign matters and a battery core not carrying the foreign matters;

and the early warning module is used for determining an early warning result of the battery cells in the battery to be detected based on the standing self-discharge rate of each battery cell in the battery to be detected and the standing self-discharge rate of the single test battery cells.

The embodiment of the invention also provides a cloud platform, which comprises:

one or more processors;

storage means for storing one or more programs,

when the one or more programs are executed by the one or more processors, the one or more processors implement the method for early warning a battery cell provided by any embodiment of the present invention.

The embodiment of the invention also provides a computer readable storage medium, and a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the method for early warning the battery cell provided by any embodiment of the invention is realized.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

according to the technical scheme provided by the embodiment of the disclosure, the static self-discharge rate of each battery core in the single test battery core and the battery to be detected before and after the static preset time period is respectively obtained, the single test battery core comprises a battery core carrying a foreign object and a battery core not carrying the foreign object, the static self-discharge rate of the battery core carrying the foreign object and the battery core not carrying the foreign object can be used as standard data, and the early warning result of the battery core in the battery to be detected is determined based on the static self-discharge rate of the single test battery core, the static self-discharge rate of the battery core carrying the foreign object and the static self-discharge rate of the battery not carrying the foreign object. Through the mode, before the battery flows into the market for use, the battery core of the battery is subjected to early warning analysis based on standard data so as to obtain an accurate early warning result, and further after-sales investigation is performed on the battery according to the early warning result, so that the potential safety hazard caused by the introduction of foreign matters into the battery in the use process is avoided.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic diagram of a result of a battery cell early warning system according to the embodiment of the present disclosure;

fig. 2 is a schematic flow chart of a method for early warning a battery cell according to an embodiment of the disclosure;

fig. 3 is a schematic flow chart of a method for early warning a battery cell according to an embodiment of the disclosure;

fig. 4 is a schematic structural diagram of a battery cell early warning device according to an embodiment of the disclosure;

fig. 5 is a schematic structural diagram of a cloud platform according to an embodiment of the present invention.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.

Currently, a battery of an electric vehicle is subjected to quality detection before leaving a factory, and the battery which is qualified in detection flows into the market for use. In general, the standards for battery detection include a voltage range of a battery, a battery open-circuit voltage difference, a battery weight, a battery rest discharge time at a specific temperature, and the like. For example, the battery voltage of a single electric vehicle is 13V or more, the battery open-circuit voltage difference is not more than 0.05V, and the standing discharge time for discharging 25W power and the mass of a single battery are 4.3KG after the battery is charged in an environment of 25±2 ℃.

However, the quality detection method cannot detect the tiny foreign matters introduced into the battery inner core, if the qualified battery is detected to carry the foreign matters, and the battery carrying the foreign matters is installed on the electric vehicle for use, the electric vehicle has great risk in the use process, and huge potential safety hazards are brought to drivers and passengers.

In order to solve the above problems, embodiments of the present disclosure provide a method, an apparatus, a cloud platform, and a storage medium for early warning of a battery cell. The method can be suitable for carrying out early warning analysis on the battery core of the battery before the battery flows into the market for use, and carrying out after-sales investigation on the battery according to the early warning result, so that the potential safety hazard of the battery in the use process caused by the introduction of foreign matters is avoided.

Fig. 1 shows a schematic diagram of a cell pre-alarm method. As shown in fig. 1, the battery cell early warning system in the schematic diagram comprises a cloud platform 1, a test platform 2 for testing battery cells singly and a control platform 3 of equipment where batteries are located. The cloud platform 1, the test platform 2 and the control platform 3 establish communication connection and perform information interaction, and the test platform 2 and the control platform 3 can send data to the cloud platform 1 through a wireless network, and the wireless network can include but is not limited to communication modes such as 4G, 5G network and WiFi.

The test platform 2 collects test data and environmental temperature of a single test cell, and the single test cell comprises a cell carrying a foreign matter and a cell not carrying the foreign matter. The test platform 2 can simulate the actual operation condition of the equipment where the battery is located. The actual operation conditions include: charging node a, node b which stands for preset time after charging, working condition c for normal operation and discharging of equipment, and node d which stands for preset time after equipment operation. The test platform 2 may preset a specific cycle number, for example, 100 cycles, and execute the node a, b, c, d sequentially for each cycle number to simulate the actual operation condition of the device where the battery is located, and collect test data under each node. Alternatively, the ambient temperature may be a normal driving environment of the electric vehicle, the ambient temperature may be-25 ℃ to 50 ℃, and the temperature interval is every 10 ℃. The preset duration may be 5 hours, 8 hours, etc.

Alternatively, the test data under charging node a may include: the battery charging system comprises a charging mode, a charging time and a temperature change value in the charging process, wherein the charging mode can comprise a super quick charging mode, a common charging mode and the like, the charging time refers to the time required by the battery with the single test cell from an initial state to a full charge state, and the temperature change value refers to a first temperature rise value of the single test cell in the battery charging process; the test data under the node b which stands for a preset period after the completion of the charging may include: the static discharge time and the static discharge power can be divided, the static self-discharge rate is calculated, and the static self-discharge power is used as a first static self-discharge rate of the single test cell; the test data under the working condition c of the normal operation discharge of the equipment can comprise: discharging the battery of the single test cell for a preset time period under the actual working condition simulation condition, wherein the temperature change value refers to a second temperature rise value of the battery of the single test cell under the actual working condition simulation condition; the test data under the node d which stands for a preset time period after the equipment is operated can comprise: and dividing the standing discharge power and the standing discharge time, calculating a standing self-discharge rate, and taking the standing self-discharge power as a second standing self-discharge rate of the single test cell.

The device where the battery is located may include, but is not limited to, a mobile phone, a computer, an intelligent home appliance, an electric vehicle, and the like. In the present disclosure, an apparatus in which an electric vehicle is used as a battery is taken as an example to explain in detail a technical solution of the present disclosure. The control platform 3 includes a battery management system (Battery Management System, BMS for short) and an electronic control unit (Electronic Control Unit, ECU for short). The battery management system is used for collecting the State of Charge (SOC) of the battery of the electric vehicle at each time point, and sending the collected State of Charge to the electronic control unit, where the State of Charge is used for reflecting the remaining capacity of the battery, and the value of the State of Charge is the ratio of the remaining capacity to the battery capacity. The electronic control unit receives the state of charge and collects vehicle data of the electric vehicle in an actual running environment, wherein the vehicle data comprises: charging node a, node b which stands for preset time after charging, working condition c for normal operation and discharging of equipment, and operation data under node d which stands for preset time after equipment operation. The control platform 3 may set a cycle number, the cycle number may be determined by dividing the total capacity throughput of the battery pack of the electric vehicle by the capacity throughput at each cycle number, and the cycle number of the control platform 3 is equal to the cycle number of the test platform 2.

Similar to the data collected by the test platform 2, the test data collected by the control platform 3 at the charging node a may include: the battery charging system comprises a charging mode, a charging time and a temperature change value in the charging process, wherein the charging mode can comprise a super quick charging mode, a common charging mode and the like, the charging time refers to the time required by the battery with the single test cell from an initial state to a full charge state, and the temperature change value refers to a first temperature rise value of the single test cell in the battery charging process; the test data under the node b which stands for a preset period after the completion of the charging may include: the static discharge time and the static discharge power can be divided, the static self-discharge rate is calculated, and the static self-discharge power is used as a first static self-discharge rate of the single test cell; the test data under the working condition c of the normal operation discharge of the equipment can comprise: discharging the battery of the single test cell for a preset time period under the actual working condition simulation condition, wherein the temperature change value refers to a second temperature rise value of the battery of the single test cell under the actual working condition simulation condition; the test data under the node d which stands for a preset time period after the equipment is operated can comprise: and dividing the standing discharge power and the standing discharge time, calculating a standing self-discharge rate, and taking the standing self-discharge power as a second standing self-discharge rate of the single test cell. The ambient temperature in the actual operating environment may be a normal driving environment of the electric vehicle, the ambient temperature may be-25 ℃ to 50 ℃, and each 10 ℃ is a temperature interval. The preset duration may be 5 hours, 8 hours, etc.

Further, after the test platform 2 and the control platform 3 collect the data, the data are sent to the cloud platform 1, and the battery cell early warning analysis is performed by the cloud platform 1 based on the data.

In order to solve the problem that if the electric vehicle uses a battery carrying foreign matters, the electric vehicle has great risk in the use process, and huge potential safety hazards are brought to drivers and passengers. By adopting the battery cell early warning system shown in fig. 1, the cloud platform respectively collects the static self-discharge rate of each battery cell in the single test battery cell and the battery to be detected before and after the static preset time period, wherein the single test battery cell comprises a battery cell carrying the foreign matters and a battery cell not carrying the foreign matters, and further determines the early warning result of each battery cell in the battery to be detected based on the static self-discharge rate of each battery cell in the battery to be detected, the static self-discharge rate of the battery cell carrying the foreign matters and the static self-discharge rate of the battery cell not carrying the foreign matters.

Through the mode, the battery core of the battery can be subjected to early warning analysis before the battery flows into the market for use, so that after-sales investigation is further performed on the battery based on an early warning result, and the potential safety hazard of the battery in the use process due to the introduction of foreign matters is avoided.

Next, a specific explanation is first made on the battery cell early warning method provided by the embodiment of the present disclosure.

Fig. 2 is a schematic flow chart of a method for early warning a battery cell. Referring to fig. 2, the method includes:

s110, respectively obtaining the static self-discharge rate of each battery core in the single test battery core and the battery to be detected before and after the static preset time.

In the embodiments of the present disclosure, the single cell test cell refers to a single cell that is tested on a test platform. As described above, the test platform can simulate the actual operation condition of the battery in the electric vehicle, collect the static self-discharge rate of the single test cell before and after the static preset time, and the cloud platform obtains the static self-discharge rate of the single test cell collected by the test platform before and after the static preset time.

In the presently disclosed embodiments, the battery to be detected refers to a battery that is required to be used on an electric vehicle. Before the battery to be detected leaves the factory, the actual operation test is carried out on the battery core of the battery to be detected through the control platform. As described above, the control platform may perform an actual operation test on the electric vehicle, and collect the self-discharge rate of each cell in the battery to be detected when the battery is stationary for the preset period, and the cloud platform receives the self-discharge rate of each cell in the battery to be detected, collected by the control platform, when the battery is stationary for the preset period.

In an embodiment of the disclosure, the single test cell includes a cell carrying a foreign object and a cell not carrying a foreign object. The cell carrying the foreign matter refers to a single cell into which the foreign matter having a conductive function is introduced. It can be understood that the larger the foreign matter volume in the cell, the stronger the conductivity of the cell and the larger the static self-discharge rate of the cell. Accordingly, the volume of the foreign matters in the foreign matters carrying battery cell can be a preset minimum volume, and the foreign matters carrying battery cell can be determined after the analysis of the volume of the collected large number of foreign matters carrying battery cells. Through setting the foreign matter volume in carrying the foreign matter cell to predetermineeing minimum volume, can regard minimum volume as the volume threshold value to carry the foreign matter cell screening out of minimum volume with the volume of foreign matter surpassing, avoid making the great foreign matter cell of carrying of foreign matter volume flow in market. The cell which does not carry the foreign matter refers to a standard cell which does not introduce any foreign matter. As can be seen from the above description, the stationary self-discharge rate of the battery cell carrying the foreign matter is greater than that of the battery cell not carrying the foreign matter.

In the embodiment of the disclosure, the self-discharge rate of standing includes a first self-discharge rate of standing the battery cell after full charge and before and after the preset time period, and/or a second self-discharge rate of standing the battery cell after discharging under a specific working condition and before and after the preset time period. That is, the first stationary self-discharge rate is a stationary self-discharge rate at the node b that is stationary for a preset period of time after the completion of charging. And the second standing self-discharge rate is the standing self-discharge rate under the working condition c of normal operation discharge of the equipment. The preset duration may be any duration, for example, 5 hours, 8 hours, etc.

S120, determining an early warning result of the battery cells in the battery to be detected based on the static self-discharge rate of each battery cell in the battery to be detected and the static self-discharge rate of the battery cells in the single test.

In the embodiment of the disclosure, the early warning result of the battery cell may include whether an abnormal battery cell exists or not and prompt information of the abnormal battery cell; alternatively, the early warning result of the battery cell may include: risk level of each battery cell and prompt information corresponding to the risk level.

In an optional embodiment, the determining the early warning result of the battery cell in the battery to be detected based on the self-discharge rate of each battery cell in the battery to be detected and the self-discharge rate of the battery cell in the single test includes:

Specifically, if the static self-discharge rate is the first static self-discharge rate, comparing the first static self-discharge rate of each cell in the battery to be detected with the first static self-discharge rate of the cell without the foreign matter; further, if the first standing self-discharge rate of each cell in the battery to be detected is smaller than the first standing self-discharge rate of the cell without the foreign matter, determining that the abnormal cell does not exist in the battery to be detected; if the first standing self-discharge rate of a certain battery cell in the battery to be detected is larger than or equal to the first standing self-discharge rate of the battery cell which does not carry the foreign matters, determining that the abnormal battery cell exists in the battery to be detected, and determining prompt information corresponding to the abnormal battery cell, wherein the prompt information can include but is not limited to prompt focusing on the abnormal battery cell, short-circuit prompt and the like.

It should be noted that, the method for determining the early warning result of the battery cell in the battery to be detected based on the second self-discharge rate is the same as the above method, and the foregoing description can be specifically referred to.

If the standing self-discharge rate is a first self-discharge rate and a second self-discharge rate, the method for determining the early warning result of the battery cell in the battery to be detected can comprise the following steps: comparing the first standing self-discharge rate and the second standing self-discharge rate of each cell in the battery to be detected with the first standing self-discharge rate and the second standing self-discharge rate of the cell without the foreign matters; if the first standing self-discharge rate and the second standing self-discharge rate of each cell in the battery to be detected are smaller than the first standing self-discharge rate of the cell without the foreign matter, determining that the abnormal cell does not exist in the battery to be detected; if the first standing self-discharge rate or the second standing self-discharge rate of a certain battery core in the battery to be detected is larger than or equal to the first standing self-discharge rate of the battery core without carrying the foreign matters, determining that an abnormal battery core exists in the battery to be detected, and determining prompt information corresponding to the abnormal battery core, wherein the prompt information can include but is not limited to prompt focusing on the abnormal battery core, short-circuit prompt and the like.

In another alternative embodiment, determining the early warning result of the battery cell in the battery to be detected based on the self-discharge rate of the battery cell in the battery to be detected and the self-discharge rate of the battery cell in the single test includes:

Optionally, six risk level intervals can be divided based on the first standing self-discharge rate or the second standing self-discharge rate of the battery cells carrying the foreign matters and the battery cells not carrying the foreign matters, if the risk level interval of each battery cell of the battery to be detected is the first interval, the risk level corresponding to each battery cell is determined to be level 0, and the prompt information is that each battery cell in the battery to be detected is normal; if the battery to be detected has the battery cell positioned in the second interval, determining that the risk level corresponding to the battery cell is 1 level, and prompting information is the battery cell with extremely low risk; if a battery cell located in a third interval exists in the battery to be detected, determining that the risk level corresponding to the battery cell is level 2, and prompting that the battery cell with slight risk exists and paying attention to the battery cell; if a battery cell located in a fourth interval exists in the battery to be detected, determining that the risk level corresponding to the battery cell is level 3, prompting that the battery cell has a certain risk and focusing on the battery cell; if the battery to be detected has a battery cell located in the fifth interval, determining that the risk level corresponding to the battery cell is level 4, wherein the prompt information is that the battery to be detected has a short circuit risk; if the battery to be detected has the battery cell located in the sixth interval, determining that the risk level corresponding to the battery cell is 5, and prompting that the battery to be detected has a short circuit and needs to be maintained.

Optionally, the target risk level interval may also be determined according to the first rest self-discharge rate and the second rest self-discharge rate. The determining a target risk level interval where each cell of the battery to be detected is located may include:

Referring to the risk level intervals divided as described above, if the first risk level interval determined according to the first standing self-discharge rate is the second interval and the second risk level interval determined according to the second standing self-discharge rate is the third interval, the third interval is taken as the target risk level interval where the battery cell is located.

Optionally, determining the target risk level interval where each cell of the battery to be detected is located may also include:

Referring to the risk level intervals divided in the description, if the first risk level interval determined by the battery cell according to the first standing self-discharge rate is the second interval, the second risk level interval determined by the second standing self-discharge rate is the fourth interval, the interval average value of the first risk level interval and the second risk level interval is the third interval, and the third interval is taken as the target risk level interval where the battery cell is located.

Fig. 3 is a schematic flow chart of a cell early warning method. Referring to fig. 3, the method includes:

s210, respectively obtaining the static self-discharge rate of each battery core in the single test battery core and the battery to be detected before and after the static preset time.

In an embodiment of the disclosure, the single test cell includes a cell carrying a foreign object and a cell not carrying a foreign object.

S220, respectively acquiring temperature rise values of the single test battery cell and each battery cell of the battery to be detected.

In the embodiment of the disclosure, the temperature rise value refers to a temperature change value of the battery cell within a certain period of time. The temperature rise value may include a first temperature rise value of the battery cell before and after full charge, and/or a second temperature rise value of the battery cell before and after discharge under a specific working condition. That is, the first temperature rise value is a temperature change value at the charging node a, and the second temperature rise value is a temperature change value at the operating condition c where the device is normally operating and discharging.

S230, comparing the static self-discharge rate of each cell in the battery to be detected with the static self-discharge rate of the cell carrying the foreign matters and the cell not carrying the foreign matters respectively, and obtaining a comparison result of the static self-discharge rates.

In some embodiments of the present disclosure, in order to improve the early warning accuracy of the battery cell, the comparison result of the standing self-discharge rate may be determined more carefully. Accordingly, in the embodiments of the present disclosure, the comparison result of the stationary self-discharge rate includes at least one of the following cases: the static self-discharge rate of each cell in the battery to be detected is smaller than that of the cell without the foreign matter; the static self-discharge rate of a certain cell in the battery to be detected is larger than or equal to the static self-discharge rate of a cell without the foreign matters, and smaller than the static self-discharge rate of the cell with the foreign matters; the static self-discharge rate of a certain cell in the battery to be detected is larger than or equal to that of a cell carrying foreign matters.

S240, comparing the temperature rise value of the single test battery cell with the temperature rise value of each battery cell of the battery to be detected to obtain a comparison result of the temperature rise values.

It can be understood that the electrical core carrying the foreign matters has higher conductivity than the electrical core not carrying the foreign matters, and the temperature rise value of the electrical core carrying the foreign matters is larger than that of the electrical core not carrying the foreign matters in the charging process of the electrical core. Therefore, in some embodiments, the temperature rise value of each cell of the battery to be detected and the temperature rise value of the cell carrying the foreign matters can be compared only to combine the comparison result of the temperature rise values to perform the cell early warning analysis. In other embodiments, the temperature rise value of each cell of the battery to be detected can be respectively compared with the temperature rise value of the cell carrying the foreign matter and the temperature rise value of the cell not carrying the foreign matter to obtain a comparison result of the temperature rise values, so that the cell early warning analysis can be performed by combining the comparison result.

In some embodiments of the present disclosure, the comparison of the temperature rise values may include at least one of: the temperature rise value of each electric core in the battery to be detected is smaller than or equal to the temperature rise value of the electric core carrying the foreign matters; the temperature rise value of a certain cell in the battery to be detected is smaller than or equal to the standing self-discharge rate of the cell carrying the foreign matters; the temperature rise value of a certain cell in the battery to be detected is larger than that of a cell carrying foreign matters.

S250, determining an early warning result of the battery core in the battery to be detected based on a comparison result of the standing self-discharge rate and a comparison result of the temperature rise value.

In an embodiment of the disclosure, determining an early warning result of a battery cell in the battery to be detected based on a comparison result of the standing self-discharge rate and a comparison result of the temperature rise value includes:

In some embodiments of the present disclosure, if the rest self-discharge rate of a certain cell in the battery to be detected is greater than or equal to the rest self-discharge rate of a cell not carrying a foreign object, or if the rest self-discharge rate of a certain cell in the battery to be detected is greater than or equal to the rest self-discharge rate of a cell carrying a foreign object, determining that an abnormal cell exists in the battery to be detected. Further, if an abnormal battery cell exists in the battery to be detected, determining the safety early warning level of the abnormal battery cell in the battery to be detected and prompt information corresponding to the safety early warning level based on a comparison result of the temperature rise values.

Specifically, if the static self-discharge rate of a certain cell in the battery to be detected is larger than or equal to the static self-discharge rate of a cell not carrying the foreign matters and smaller than the static self-discharge rate of the cell carrying the foreign matters, determining that the cell is an abnormal cell, if the temperature rise value of the abnormal cell is smaller than or equal to the temperature rise value of the cell carrying the foreign matters, determining that the safety precaution level of the abnormal cell is 2, and prompting information is the cell with slight risk in the battery to be detected, wherein the abnormal cell needs to be concerned; if the static self-discharge rate of a certain cell in the battery to be detected is larger than or equal to the static self-discharge rate of a cell not carrying the foreign matters and smaller than the static self-discharge rate of the cell carrying the foreign matters, determining that the cell is an abnormal cell, if the temperature rise value of the abnormal cell is larger than the temperature rise value of the cell carrying the foreign matters, determining that the safety pre-warning level of the abnormal cell is level 3, and prompting information is the cell with a certain risk in the battery to be detected, wherein the abnormal cell needs to be focused; if the static self-discharge rate of a certain cell in the battery to be detected is larger than or equal to the static self-discharge rate of a cell carrying foreign matters, determining that the cell is an abnormal cell, if the temperature rise value of the abnormal cell is smaller than or equal to the temperature rise value of the cell carrying foreign matters, determining that the safety precaution level of the abnormal cell is level 4, prompting that the cell with a certain risk in the battery to be detected exists, and the battery to be detected has a short circuit risk; if the static self-discharge rate of a certain cell in the battery to be detected is larger than or equal to the static self-discharge rate of the cell carrying the foreign matters, determining that the cell is an abnormal cell, and if the temperature rise value of the cell is larger than the temperature rise value of the cell carrying the foreign matters, the safety precaution level of the abnormal cell is 5 levels, and the prompt information is that the battery to be detected has a short circuit and needs to be maintained.

In some embodiments of the present disclosure, if the rest self-discharge rate of each cell in the battery to be detected is smaller than the rest self-discharge rate of the cell that does not carry the foreign matter, it is determined that there is no abnormal cell in the battery to be detected.

Specifically, if the standing self-discharge rate of each electric core in the battery to be detected is smaller than that of the electric core without the foreign matters, determining that the abnormal electric core does not exist in the battery to be detected, and if the temperature rise value of each electric core in the battery to be detected is smaller than or equal to that of the electric core with the foreign matters, the safety early warning level of the battery to be detected is 0 level, and the prompt information is that the battery to be detected is normal; if the static self-discharge rate of each cell in the battery to be detected is smaller than that of the cell without the foreign matter, determining that no abnormal cell exists in the battery to be detected, if the temperature rise value of a certain cell in the battery to be detected is larger than that of the cell with the foreign matter, then the cell with the minimum risk exists in the battery to be detected, the safety early warning level of the battery to be detected is 1 level, and the prompt information is that the risk of the battery to be detected is minimum.

In the embodiment of the disclosure, the comparison result of the temperature rise value may be a comparison result of the first temperature rise value, and correspondingly, the comparison result of the standing self-discharge rate may be a comparison result of the first standing self-discharge rate; alternatively, the comparison result of the temperature rise value may be the comparison result of the second temperature rise value, and correspondingly, the comparison result of the rest self-discharge rate may be the comparison result of the second rest self-discharge rate or the comparison result of the second temperature rise value.

In the embodiment of the disclosure, the comparison result of the temperature rise value may also include a comparison result of the first temperature rise value and a comparison result of the second temperature rise value, and correspondingly, the comparison result of the rest self-discharge rate may be a comparison result of the first rest self-discharge rate and the second rest self-discharge rate. Accordingly, determining the safety precaution level of the abnormal battery cell in the battery to be detected may include: if the first safety early warning level determined based on the first standing self-discharge rate and the first temperature rise value is equal to the second safety early warning level determined based on the second standing self-discharge rate and the second temperature rise value, the first safety early warning level or the second safety early warning level is used as a target safety early warning level of each battery cell; if the first safety early warning level determined based on the first standing self-discharge rate and the first temperature rise value is different from the second safety early warning level determined based on the second standing self-discharge rate and the second temperature rise value, taking the high-level safety early warning level as the target safety early warning level of each cell; or taking the average grade of the first safety precaution grade and the second safety precaution grade as the target safety precaution grade of each battery cell.

In the embodiment of the disclosure, the early warning result of the battery cell in the battery to be detected is fed back to the client, so that the client displays the early warning result.

The client may include, but is not limited to, a mobile phone, desktop computer, tablet, notebook, etc.

According to the technical scheme provided by the embodiment of the disclosure, the early warning result of each battery cell in the battery to be tested is determined based on the standing self-discharge rate and the temperature rise value, so that the accuracy of determining the early warning result can be improved; the early warning result is fed back to the client, so that the early warning result can be displayed on the client, the battery cell is maintained based on the early warning result, and potential safety hazards in the use process of the battery are eliminated.

The following is an embodiment of the battery cell early-warning device provided by the embodiment of the present invention, which belongs to the same inventive concept as the battery cell early-warning method of the above embodiments, and details of the embodiment of the battery cell early-warning device, which are not described in detail, may refer to the embodiment of the above battery cell early-warning method.

As shown in fig. 4, the cell early warning device includes: a static self-discharge rate acquisition module 310 and an early warning module 320.

The static self-discharge rate acquisition module 310 is configured to acquire static self-discharge rates of each of the single test battery cells and the battery to be detected before and after a preset time period of static, where the single test battery cells include a battery cell with a foreign object and a battery cell without a foreign object;

And the early warning module 320 is configured to determine an early warning result of each cell in the battery to be detected based on the self-discharge rate of the rest of each cell in the battery to be detected and the self-discharge rate of the rest of the single test cell.

Optionally, the early warning module 320 is specifically configured to compare the static self-discharge rate of each cell in the battery to be detected with the static self-discharge rates of the cell carrying the foreign object and the cell not carrying the foreign object, so as to obtain a comparison result of the static self-discharge rates;

Optionally, the early warning module 320 is specifically configured to determine risk level intervals based on the standing self-discharge rates of the battery cells carrying the foreign matters and the battery cells not carrying the foreign matters, where each risk level interval corresponds to a risk level and prompt information;

Optionally, the early warning module 320 is specifically configured to, in a case where the self-discharge rate includes a first self-discharge rate and a second self-discharge rate, take the risk level interval of the high level as the target risk level interval where each cell is located if the first risk level interval determined based on the first self-discharge rate is not equal to the second risk level interval determined based on the second self-discharge rate.

Optionally, the early warning module 320 is specifically configured to, in a case where the self-discharge rate includes a first self-discharge rate and a second self-discharge rate, take an interval average value of the first risk level interval and the second risk level interval as the target risk level interval where each cell is located if the first risk level interval determined based on the first self-discharge rate is not equal to the second risk level interval determined based on the second self-discharge rate.

Optionally, the apparatus further comprises: a temperature rise value acquisition module; and the temperature rise value acquisition module is used for respectively acquiring the temperature rise values of the single test battery cell and each battery cell of the battery to be detected.

Optionally, the early warning module 320 is specifically configured to determine whether an abnormal electrical core exists in the battery to be detected based on a comparison result of the standing self-discharge rate;

Optionally, the apparatus further comprises: the early warning result sending module; and the early warning result sending module is used for feeding back the early warning result of the battery cell in the battery to be detected to the client so that the client displays the early warning result.

The following is an embodiment of the cloud platform provided by the embodiment of the present invention, where the cloud platform and the battery cell early warning method of the above embodiments belong to the same inventive concept, and details of the embodiment of the cloud platform that are not described in detail may refer to an embodiment of the battery cell early warning method.

Referring to fig. 5, the present embodiment provides a cloud platform 400, which includes: one or more processors 420; the storage device 410 is configured to store one or more programs, where the one or more programs are executed by the one or more processors 420, so that the one or more processors 420 implement the method for early warning a battery cell according to the embodiment of the present invention, including:

Of course, those skilled in the art will understand that the processor 420 may also implement the technical solution of the battery cell early warning method provided in any embodiment of the present invention.

The cloud platform 400 shown in fig. 5 is only an example, and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

As shown in fig. 5, the cloud platform 400 includes a processor 420, a storage device 410, an input device 430, and an output device 440; the number of processors 420 in the cloud platform may be one or more, one processor 420 being taken as an example in fig. 5; the processor 420, storage 410, input 430, and output 440 in the cloud platform may be connected by a bus or other means, for example in fig. 5.

The storage device 410 is used as a computer readable storage medium for storing a software program, a computer executable program, and a module, such as program instructions/modules corresponding to the cell early warning method in the embodiment of the present invention (for example, the stationary self-discharge rate collection module 310 and the early warning module 320 in the cell early warning device).

The storage device 410 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for functions; the storage data area may store data created according to the use of the terminal, etc. In addition, the storage 410 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, storage 410 may further include memory remotely located with respect to processor 420, which may be connected to the cloud platform via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The input device 430 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the cloud platform, which may include at least one of a mouse, a keyboard, and a touch screen, for example. The output device 440 may include a display screen or the like displaying the cloud platform.

The following is an embodiment of a computer readable storage medium provided by an embodiment of the present invention, where the computer readable storage medium and the battery cell early warning method of each embodiment are the same inventive concept, and details of the embodiment of the computer readable storage medium are not described in detail, and reference may be made to the embodiment of the battery cell early warning method.

The present embodiment provides a storage medium containing computer executable instructions, which when executed by a computer processor, are for performing a cell pre-warning method, the method comprising:

Of course, the storage medium containing the computer executable instructions provided in the embodiments of the present invention is not limited to the above-mentioned method operations, and may also perform the related operations in the battery cell early warning method provided in any embodiment of the present invention.

From the above description of embodiments, it will be clear to a person skilled in the art that the present invention may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or what contributes to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and the like, and includes several instructions for causing a computer cloud platform (which may be a personal computer, a server, or a network cloud platform, etc.) to execute the electrical core warning method provided by the embodiments of the present invention.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims

1. The battery cell early warning method is characterized by comprising the following steps of:

determining an early warning result of the battery cells in the battery to be detected based on the standing self-discharge rate of each battery cell in the battery to be detected and the standing self-discharge rate of the single test battery cell;

the determining the early warning result of the battery cell in the battery to be detected based on the standing self-discharge rate of each battery cell in the battery to be detected and the standing self-discharge rate of the single test battery cell comprises the following steps:

determining risk level intervals based on the standing self-discharge rate of the battery cells carrying the foreign matters and the battery cells not carrying the foreign matters, wherein each risk level interval corresponds to a risk level and prompt information, and the standing self-discharge rate comprises a first standing self-discharge rate of the battery cells after full charge and before and after the preset time period of standing, and/or a second standing self-discharge rate of the battery cells after discharging under a specific working condition and before and after the preset time period of standing;

2. The method of claim 1, wherein the determining the pre-warning result of the cells in the battery to be detected based on the self-discharge rate of the cells in the battery to be detected and the self-discharge rate of the cells in the single test comprises:

3. The method of claim 2, wherein determining a target risk level interval in which each cell of the battery to be detected is located comprises:

4. The method of claim 2, wherein determining a target risk level interval in which each cell of the battery to be detected is located comprises:

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

6. The method of claim 5, wherein the determining the pre-warning result of the cells in the battery to be detected based on the self-discharge rate of the cells in the battery to be detected and the self-discharge rate of the cells in the single test comprises:

7. The method of claim 6, wherein the determining the pre-warning result of the cell in the battery to be detected based on the comparison result of the rest self-discharge rate and the comparison result of the temperature rise value comprises:

8. The method of claim 5, wherein the temperature rise value comprises a first temperature rise value of the battery cell before and after full charge, and/or a second temperature rise value of the battery cell before and after discharge under a specific operating condition.

9. The method of claim 1, wherein each cell in the battery to be tested is the same as the operating conditions of the single test cell, the operating conditions comprising: at least one of standing time, ambient temperature, discharge working condition and detection times of the battery cell.

10. The method according to any one of claims 1 to 9, further comprising:

and feeding back the early warning result of the battery cell in the battery to be detected to a client so that the client displays the early warning result.

11. The utility model provides a electricity core early warning device which characterized in that includes:

the early warning module is used for determining an early warning result of each cell in the battery to be detected based on the standing self-discharge rate of each cell in the battery to be detected and the standing self-discharge rate of the single test cell;

the early warning module is specifically configured to determine risk level intervals based on a self-discharge rate of a battery cell carrying a foreign object and a battery cell not carrying the foreign object, where each risk level interval corresponds to a risk level and prompt information, and the self-discharge rate of the battery cell after full charge and before and after the preset time period of standing, and/or a second self-discharge rate of the battery cell after discharging under a specific working condition and before and after the preset time period of standing;

12. A cloud platform, comprising:

one or more processors;

storage means for storing one or more programs,

the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of cell pre-warning of any one of claims 1-10.

13. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the cell pre-warning method according to any one of claims 1-10.