CN114355208A - A battery fault determination method, device, electronic device and storage medium - Google Patents

Abstract

The present application relates to the field of battery technologies, and in particular, to a method and an apparatus for determining a battery fault, an electronic device, and a storage medium, where the method is applied to a battery pack including a plurality of identical cells, and includes: acquiring state information of the battery pack within a first preset time period, wherein the state information of the battery pack comprises output voltage and temperature variation of the battery pack; determining whether a fault battery cell exists in the battery pack based on the state information of the battery pack and the acquired reference state information; if so, acquiring the state information of each battery cell, wherein the state information of each battery cell comprises the output voltage of the battery cell and a label, and the label is a preset number for each battery cell; determining a fault battery cell based on the state information of all battery cells; and acquiring and outputting the label of the fault battery cell. This application has the effect of being convenient for in time discover and fix a position the electric core of damage in the group battery.

Description

A battery fault determination method, device, electronic device and storage medium

technical field

The present application relates to the field of battery technology, and in particular, to a battery fault determination method, device, electronic device and storage medium.

Background technique

A common battery is also called a battery pack. A battery pack is usually composed of multiple cells in parallel or in series. Since the voltage of each cell is low, battery packs with different output voltages and different amounts of power can be combined in this way. To power electronic devices or electric vehicles.

However, in the actual use process, the practical life of each cell is not consistent. Therefore, some cells in the battery pack may be damaged earlier, and the damaged cells are usually unable to output voltage, or the output voltage is small, which in turn makes the battery The output voltage of the battery pack is low or the battery pack heats up, which may easily affect the normal use of electric vehicles or electronic equipment.

At the same time, the damaged cells also have certain safety hazards in the battery pack. If the damaged cells cannot be found and replaced in time, safety accidents may also occur. Therefore, how to find and locate the damaged cells in time is a problem to be solved. question.

SUMMARY OF THE INVENTION

In order to facilitate timely discovery and location of damaged cells in a battery pack, the present application provides, in particular, a battery fault determination method, device, electronic device and storage medium.

In the first aspect, the present application provides a battery fault determination method, device, electronic device and storage medium, and adopts the following technical solutions:

A battery failure determination method applied to a battery pack composed of a plurality of identical cells, including

acquiring status information of the battery pack within a first preset time period, where the status information of the battery pack includes the output voltage and temperature change of the battery pack;

Whether there are faulty cells in the battery pack is determined based on the status information of the battery pack and the acquired reference status information, where the reference status information includes a state in which all cells are healthy under the current power level of the battery pack The minimum voltage and maximum temperature change when the load is normally powered;

If so, obtain the status information of each cell, the status information of each cell includes the output voltage of the cell and a label, and the label is a preset number for each cell;

determining the faulty cell based on the state information of all the cells;

Get the label of the faulty cell and output it.

By adopting the above technical solution, the electronic device can firstly determine whether there are faulty cells in the battery pack from the output voltage and temperature change of the battery pack within the first preset time period and in combination with the reference state information, so as to facilitate the user to find out in time; After it is determined that there is a faulty cell, the electronic device can obtain the output voltage of each cell, and then determine which is the faulty cell, and then obtain the label of the faulty cell and output it, so that the user can determine the specific location of the specific faulty cell.

In a possible implementation manner, the acquiring the state information of the battery pack within the first preset time period includes:

Acquiring the instantaneous voltage of the battery pack for a first preset number of times within a first preset time period;

determining the output voltage of the battery pack based on all of the instantaneous voltages;

acquiring the first temperature of the battery pack at the start time of the first preset duration and the second temperature of the battery pack at the end time of the first preset duration;

A difference between the second temperature and the first temperature is determined as the temperature change amount.

By adopting the above technical solution, the output voltage of the battery pack is determined based on multiple instantaneous voltages of the battery pack obtained within the first preset time period, which can more accurately reflect the continuous working state of the battery pack and reduce the fluctuation of the instantaneous voltage of the battery pack. At the same time, the temperature change of the battery pack after the first preset time period is obtained, which can more accurately reflect the working temperature of the battery pack.

In a possible implementation manner, the determining the output voltage of the battery pack based on all the instantaneous voltages includes:

Delete the maximum value and the minimum value from all the instantaneous voltages to obtain the preprocessed instantaneous voltage;

Determining that the average number of the pre-processed instantaneous voltages is the pre-processing average value;

determining a median value from all of said instantaneous voltages;

An average value of the median value and the preprocessed average value is determined as the output voltage of the battery pack.

By adopting the above technical solution, the output voltage of the battery pack is further reduced by taking the average value obtained by removing the instantaneous voltage of the maximum value and the minimum value, and then taking the average value of the average value and the median value of all instantaneous voltages as the output voltage of the battery pack. The effect of instantaneous voltage fluctuations on the obtained results.

In a possible implementation manner, before determining whether there are faulty cells in the battery pack based on the status information of the battery pack and the obtained reference status information, the method further includes:

determining the current charge of the battery pack;

The basic state information is determined based on the current power level and a preset mapping relationship between the power level and the basic state information.

By adopting the above technical solution, when the current power of the battery pack is different, the output voltage of the battery pack will also be different. Therefore, the current power of the battery pack is first determined, and then based on the basic state information corresponding to the current power, the basic state information is compared, and then the battery pack is determined. Whether there is a faulty cell can improve the accuracy of the determined result.

In a possible implementation manner, the determining whether there is a faulty cell in the battery pack based on the status information of the battery pack and the obtained reference status information includes:

judging whether the output voltage of the battery pack is less than the minimum voltage;

If so, determine whether the temperature change amount is greater than the maximum temperature change amount;

If so, it is determined that there is a faulty cell.

By adopting the above technical solution, when the output voltage of the battery pack at the current power level is lower than the output voltage of the battery pack at the current power level and the cells are all healthy, it can be judged that there is a faulty cell, and the temperature change is used to further In contrast, when the change amount of the battery pack within the first preset time period is greater than the maximum temperature change amount, it is then determined that there are faulty cells in the battery pack, which can further improve the reliability of the determined result.

In a possible implementation manner, acquiring the instantaneous voltage of the battery cell for a second preset number of times within a second preset time period;

Determine the average value of all the instantaneous voltages of any cell as the output voltage of any cell;

Obtain the label for any of the cells described.

By adopting the above technical solution, by acquiring multiple instantaneous voltages of each cell within the second preset time period, and then obtaining the average value as the output voltage of the cell, the real work of each cell can be more accurately reflected Happening.

In a possible implementation manner, the determining the faulty cell based on the state information of all the cells includes:

determining the average value of said output voltage of all cells;

It is determined that the cell whose output voltage is lower than the average value is a faulty cell.

By adopting the above technical solution, the output voltage of the faulty cell is low or does not output voltage, therefore, the cell with the output voltage less than the average value is likely to be a faulty cell.

In the second aspect, the present application provides a battery fault determination device, which adopts the following technical solutions:

A battery fault determination device is applied to a battery pack composed of a plurality of identical cells, including:

a battery pack status information acquisition module, configured to acquire status information of the battery pack within a first preset time period, where the battery pack status information includes the output voltage and temperature change of the battery pack;

A first determination module, configured to determine whether there is a faulty cell in the battery pack based on the status information of the battery pack and the acquired reference status information, the reference status information including the current power level of the battery pack at all levels; The minimum voltage and maximum temperature change when the cells are healthy and the load is normally supplied with power;

The cell state information acquisition module is used to acquire the state information of each cell, the state information of each cell includes the output voltage of the cell and a label, and the label is a preset number for each cell ;

a second determination module, configured to determine the faulty cell based on the state information of all the cells;

The fault cell label acquisition module is used for acquiring and outputting the fault cell tag.

By adopting the above technical solution, the device can firstly determine whether there are faulty cells in the battery pack from the output voltage and temperature change of the battery pack within the first preset time period and in combination with the reference state information, so as to facilitate the user to find out in time; After it is determined that there is a faulty cell, the device can obtain the output voltage of each cell, and then determine which is the faulty cell, and then obtain the label of the faulty cell and output it, so that the user can determine the specific location of the specific faulty cell.

In a possible implementation manner, when the battery pack status information acquisition module acquires the status information of the battery pack, it is specifically used for:

Acquiring the instantaneous voltage of the battery pack for a first preset number of times within a first preset time period;

determining the output voltage of the battery pack based on all of the instantaneous voltages;

acquiring the first temperature of the battery pack at the start time of the first preset duration and the second temperature of the battery pack at the end time of the first preset duration;

A difference between the second temperature and the first temperature is determined as the temperature change amount.

In a possible implementation manner, when the battery pack status information acquires the status information of the battery pack within the first preset time period, it is specifically used for:

Delete the maximum value and the minimum value from all the instantaneous voltages to obtain the preprocessed instantaneous voltage;

Determining that the average number of the pre-processed instantaneous voltages is the pre-processing average value;

determining a median value from all of said instantaneous voltages;

An average value of the median value and the preprocessed average value is determined as the output voltage of the battery pack.

In a possible implementation manner, the device further includes:

determining the current charge of the battery pack;

The basic state information is determined based on the current power level and a preset mapping relationship between the power level and the basic state information.

In a possible implementation manner, when the first determination module determines whether there is a faulty cell in the battery pack based on the status information of the battery pack and the obtained reference status information, the first determining module is specifically configured to:

judging whether the output voltage of the battery pack is less than the minimum voltage;

If so, determine whether the temperature change amount is greater than the maximum temperature change amount;

If so, it is determined that there is a faulty cell.

In a possible implementation manner, when the cell state acquisition module acquires the state information of any cell, it is specifically used for:

Acquiring the instantaneous voltages of the cells for a second preset number of times within a second preset time period;

Determine the average value of all the instantaneous voltages of any cell as the output voltage of any cell;

Obtain the label for any of the cells described.

In a possible implementation manner, when the second determining module determines the faulty cell based on the state information of all the cells, it is specifically used for:

determining the average value of said output voltage of all cells;

It is determined that the cell whose output voltage is lower than the average value is a faulty cell.

The third aspect, the application provides a kind of electronic equipment, adopts the following technical scheme:

An electronic device comprising:

at least one processor;

memory;

At least one application program, wherein the at least one application program is stored in the memory and configured to be executed by the at least one processor, the at least one application program is configured to: perform the above-described battery failure determination method.

In a fourth aspect, the present application provides a computer-readable storage medium, which adopts the following technical solutions:

A computer-readable storage medium comprising: a computer program capable of being loaded by a processor and executing the above battery failure determination method stored thereon.

To sum up, the present application includes at least one of the following beneficial technical effects:

The electronic device can first determine whether there is a faulty cell in the battery pack from the output voltage and temperature change of the battery pack within the first preset time period and in combination with the reference state information, so as to facilitate the user to find out in time; at the same time, after determining that there is a faulty cell , the electronic device can obtain the output voltage of each cell, and then judge which is the faulty cell, and then obtain the label of the faulty cell and output it, so that the user can determine the specific location of the specific faulty cell;

When the current power of the battery pack is different, its output voltage will also be different. Therefore, the current power of the battery pack is first determined, and then based on the basic state information corresponding to the current power, it is compared to determine whether there are faulty cells in the battery pack. be able to improve the accuracy of the results determined;

When the output voltage of the battery pack at the current power level is less than the output voltage of the battery pack at the current power level and the cells are all healthy, it can already be judged that there are faulty cells, and the temperature change is used for further comparison. When the variation within the first preset time period is greater than the maximum temperature variation, it is then determined that there are faulty cells in the battery pack, which can further improve the reliability of the determined result.

Description of drawings

1 is a schematic flowchart of a method for determining a battery fault in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a battery fault determination device in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of an electronic device in an embodiment of the present application.

Detailed ways

The present application will be described in further detail below with reference to accompanying drawings 1 to 3 .

Those skilled in the art may, after reading this specification, make modifications to this embodiment without creative contribution as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

In addition, the term "and/or" in this article is only an association relationship to describe associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, There are three cases of B alone. In addition, the character "/" in this article, unless otherwise specified, generally indicates that the related objects before and after are an "or" relationship.

An embodiment of the present application provides a method for determining a battery fault, which is executed by an electronic device and applied to a battery pack composed of a plurality of identical cells; with reference to FIG. 1 , the method includes steps S101 , S102 , S103 , and S103 , step S104 and step S105, wherein:

Step S101 , acquiring status information of the battery pack, where the status information of the battery pack includes the output voltage and temperature variation of the battery pack.

In the embodiment of the present application, the output voltage of the battery pack can be obtained by using a voltage measuring chip or a digital voltage measuring instrument. The measurement result of only one measurement can be used as the output voltage, or the results of multiple measurements can be averaged. Please refer to the following examples for details on how the battery pack outputs voltage. During the first preset time period, the temperature of the battery pack at at least two times is acquired through the temperature sensor, and the temperature change amount of the battery pack is obtained.

In practice, when there is a faulty cell in the battery pack, the output voltage of the battery pack will fluctuate because the output voltage of the cell decreases or the cell does not output voltage, that is, the voltage of the battery pack will be smaller. When the battery cell is damaged, because of the resistance value of the battery cell itself, the battery cell may generate heat inside the battery, so this will cause a large change in the temperature of the battery pack.

Step S102: Determine whether there are faulty cells in the battery pack based on the status information of the battery pack and the obtained reference status information, where the reference status information includes when the battery pack supplies power to the load normally under the current power level and when all cells are healthy minimum voltage and maximum temperature change.

Specifically, for the same battery pack, when the current power, ie the remaining power, is different, the output voltages during normal operation are also different. Therefore, based on the current battery power, determine the reference state information of the battery pack under the current power level, and then determine whether the battery pack has faulty cells based on the obtained battery pack status information and reference status information. See the examples below for details.

Step S103 , if there is a faulty cell, obtain status information of each cell, where the status information of each cell includes the output voltage of the cell and a label, where the label is a preset number for each cell.

In the embodiment of the present application, for any battery cell, the output voltage thereof may be an average value obtained by multiple measurements within a time period, or may be an instantaneous value at any moment. For the label, the number of the battery cell is actually preset for the setting position of each cell, and the label of each battery cell is different, which is convenient for the user number to determine the position of the corresponding battery cell.

Step S104 , determining the faulty cell based on the state information of all the cells.

In this embodiment, comprehensive judgment is made on the obtained state information of all cells, and the cell with the difference in the state information is determined as the faulty cell. For the specific method of determining the faulty cell, please refer to the following implementation for details. example.

Step S105, acquiring and outputting the label of the faulty cell.

In the embodiment of the present application, after it is determined that there are all faulty cells, the label of each faulty cell is obtained and then output; further, it is necessary to set the label of the position of each cell in the battery pack or the cell body to set the label content, so that the user can determine the specific location of all faulty cells based on all the output labels.

The electronic device can first determine whether there is a faulty cell in the battery pack from the output voltage and temperature change of the battery pack within the first preset time period and in combination with the reference state information, so as to facilitate the user to find out in time; at the same time, after determining that there is a faulty cell , the electronic device can obtain the output voltage of each cell, and then judge which is the faulty cell, and then obtain the label of the faulty cell and output it, so that the user can determine the specific location of the specific faulty cell.

Further, step S101 may include step S1011 (not shown in the figure), step S1012 (not shown in the figure), step S1013 (not shown in the figure) and step S1014 (not shown in the figure), wherein:

Step S1O11, obtaining the instantaneous voltage of the battery pack for a first preset number of times within a first preset time period;

Step S1012: Determine the output voltage of the battery pack based on all the instantaneous voltages.

Specifically, obtaining the output voltage of the battery pack within the first preset time period can more accurately reflect the continuous working state of the battery pack, and at the same time, obtaining the instantaneous voltage for a preset number of times within the first preset time period can further reduce the The probability of inaccurate measurement results due to instantaneous voltage fluctuations of the battery pack.

The specific duration of the first preset duration and the specific number of preset times are not limited in the embodiments of the present application, as long as it is convenient to more accurately determine the continuous working state of the battery pack, thereby facilitating the determination of whether there is a faulty battery in the battery pack The core can be.

Step S1013, acquiring the first temperature of the battery pack at the start time of the first preset duration and the second temperature of the battery pack at the end time of the first preset duration;

Step S1014: Determine the difference between the second temperature and the first temperature as a temperature change amount.

Specifically, the timing starts when the first temperature of the battery pack is obtained, the second temperature of the battery pack is obtained after a first preset time period, and then the difference between the first temperature and the second temperature is determined as the temperature change amount of the battery pack.

Further, step S1012 may include step SA1 (not shown in the figure), step SA2 (not shown in the figure), step SA3 (not shown in the figure) and step SA4 (not shown in the figure), wherein:

Step SA1: Delete the maximum value and the minimum value from all the instantaneous voltages to obtain the preprocessed instantaneous voltage.

Specifically, in order to obtain a more accurate continuous output voltage of the battery pack, the maximum and minimum values of the obtained multiple instantaneous voltages are deleted, and subsequent statistical processing is not performed, which can reduce the data caused by the instantaneous voltage fluctuation of the battery pack. error.

Step SA2: Determine the average of the pre-processed instantaneous voltages as the pre-process average.

Specifically, for example, if there are 5 instantaneous voltages obtained, and they are 30V, 32V, 33V, 31V and 29V respectively, then the two data of 33V and 29V should be deleted, and the average value of 30V, 32V and 31 should be processed to obtain the average value of 31V.

Step SA3, determine the median value from all the instantaneous voltages;

Step SA4: Determine the average value of the median value and the pre-processed average value as the output voltage of the battery pack.

Specifically, the median value and the obtained average value of all instantaneous voltages are averaged again to obtain the average value of the median value and the average value, and then the final average value can more accurately characterize the battery pack in the first The voltage value that is output continuously and stably for a preset period of time.

Following the above example, the median value is 31V, and the average value obtained after removing the maximum and minimum values is 31V. Therefore, based on the average processing of 31V and 31V, the output voltage of the battery pack obtained is also 31V.

Further, before step S102, it also includes step SB1 (not shown in the figure) and step SB2 (not shown in the figure), wherein:

Step SB1, determine the current power of the battery pack.

Specifically, the current power information of the battery pack can be measured by the power detection device or the power detection chip, which requires that the battery pack is always connected to the power detection device or the power detection chip, and then the electronic device reads the data of the power detection device or the power detection chip. The current capacity of the battery pack, that is, the remaining capacity of the battery pack.

Step SB2: Determine the basic state information based on the current power level and the preset mapping relationship between the power level and the basic state information.

Specifically, the mapping relationship between the battery pack and the basic status information under different power levels is pre-set. For example, when the battery pack power is 70%, the basic status information can be an output voltage of 30V and a temperature change of 5°C; When it is 60%, the basic state information may be an output voltage of 29V and a temperature change of 3°C; the specific basic state information corresponding to a specific amount of electricity is not limited in any specific embodiment of the present application.

Further, step S102 may include step S1021 (not shown in the figure), step S1022 (not shown in the figure) and step S1023 (not shown in the figure), wherein:

Step S1021, judging whether the output voltage of the battery pack is less than the minimum voltage;

Step S1022, if yes, determine whether the temperature change amount is greater than the maximum temperature change amount;

Step S1023: If yes, it is determined that there is a faulty cell.

Specifically, judging whether the output voltage of the battery pack is less than the minimum voltage and judging whether the temperature change is greater than the maximum temperature change can be performed simultaneously or sequentially, but in the end, only when the temperature change is greater than the maximum temperature change and the output voltage Only when the voltage is less than the minimum voltage can it be determined that there are faulty cells in the battery pack.

When the output voltage of the battery pack at the current power level is less than the output voltage of the battery pack at the current power level and the cells are all healthy, it can already be judged that there are faulty cells, and the temperature change is used for further comparison. When the variation within the first preset time period is greater than the maximum temperature variation, it is then determined that there are faulty cells in the battery pack, which can further improve the reliability of the determined result.

Further, step S103 may include step S1031 (not shown in the figure), step S1032 (not shown in the figure) and step S1033 (not shown in the figure), wherein:

Step S1031, obtaining the instantaneous voltage of the cell for a second preset number of times within a second preset time period;

Step S1032: Determine the average value of all instantaneous voltages of any cell as the output voltage of any cell.

Specifically, a plurality of instantaneous voltages of each cell are acquired within a second preset time period, and then, for each cell, an average value is calculated based on the obtained instantaneous voltages of the plurality of cells, as the cell in the second The output voltage within the preset time period can improve the accuracy of quasi-acquired results.

Step S1033, acquiring the label of any cell.

Specifically, for the label, the device or loop for measuring the output voltage of each battery cell can be used to set the label in advance for each cell. When the output voltage of each battery cell is obtained, it is also obtained. Label for each cell. It is also possible to obtain the output voltage of each cell in turn according to the set words, and at the same time mark the label of each cell in the set order. For example, the battery pack includes a total of 10 cells. If the output voltage of the cell is obtained in the order of 10, after the output voltage of the first cell is obtained, the output voltage and the label 1 are used as the status information of the cell at the same time. Of course, other ways of acquiring the state information of the battery cells may also be used, which are not specifically limited in the embodiments of the present application, as long as it is convenient to obtain the output voltage and label of each battery cell.

Further, step S104 may include step S1041 (not shown in the figure) and step S1042 (not shown in the figure), wherein:

Step S1041, determining the average value of the output voltages of all the cells;

Step S1042 , determining that the cells whose output voltage is lower than the average value are faulty cells.

Specifically, after obtaining the output voltage of each cell, the average value of the output voltages of all the cells is determined. Generally speaking, the specifications of the cells applied in the same battery pack are the same. Therefore, after obtaining the average output voltage After the output voltage is lower than the average value, there is a greater probability of failure.

The foregoing embodiment introduces a method for determining a battery fault from the perspective of method flow, and the following embodiment introduces an apparatus for determining a battery fault from the perspective of a virtual module or virtual unit. For details, refer to the following embodiments.

An embodiment of the present application provides a battery failure determination device, which is applied to a battery pack composed of multiple identical cells; as shown in FIG. 2 , the battery failure determination device may specifically include a battery pack state information acquisition module 201 , a first determination Module 202, cell state information acquisition module 203, second determination module 204, and fault cell label acquisition module 205, wherein:

The battery pack state information acquisition module 201 is configured to acquire the status information of the battery pack within a first preset time period, where the battery pack status information includes the output voltage and temperature change of the battery pack;

The first determination module 202 is configured to determine whether there are faulty cells in the battery pack based on the status information of the battery pack and the acquired reference status information, where the reference status information includes the battery pack in a state in which all cells are healthy under the current power level The minimum voltage and maximum temperature change when the load is normally powered;

The cell state information acquisition module 203 is used to acquire the state information of each cell, the state information of each cell includes the output voltage and label of the cell, and the label is a preset number for each cell;

a second determination module 204, configured to determine the faulty cell based on the state information of all the cells;

The fault cell label acquisition module 205 is used to acquire and output the fault cell tag.

In a possible implementation manner, when the battery pack status information acquisition module 201 acquires the status information of the battery pack within the first preset time period, it is specifically used for:

Acquiring the instantaneous voltage of the battery pack for a first preset number of times within a first preset time period;

Determine the output voltage of the battery pack based on all instantaneous voltages;

acquiring the first temperature of the battery pack at the start time of the first preset duration and the second temperature of the battery pack at the end time of the first preset duration;

The difference between the second temperature and the first temperature is determined as a temperature change amount.

In a possible implementation manner, when the battery pack status information acquisition module 201 acquires the status information of the battery pack, it is specifically used for:

Delete the maximum and minimum values from all instantaneous voltages to obtain the preprocessed instantaneous voltage;

Determine the average number of instantaneous voltages after preprocessing as the preprocessing average;

Determine the median value from all instantaneous voltages;

Determine the mean value of the median and the preprocessed mean as the output voltage of the battery pack.

In a possible implementation manner, the apparatus 200 further includes:

determine the current charge of the battery pack;

The basic state information is determined based on the current power level and the preset mapping relationship between the power level and the basic state information.

In a possible implementation manner, when the first determination module 202 determines whether there is a faulty cell in the battery pack based on the status information of the battery pack and the obtained reference status information, it is specifically used for:

Determine whether the output voltage of the battery pack is less than the minimum voltage;

If yes, then judge whether the temperature change is greater than the maximum temperature change;

If so, it is determined that there is a faulty cell.

In a possible implementation manner, when the cell state acquisition module 203 acquires the state information of any cell, it is specifically used for:

Acquiring the instantaneous voltages of the cells for a second preset number of times within a second preset time period;

Determine the average value of all instantaneous voltages of any cell as the output voltage of any cell;

Get the label for any cell.

In a possible implementation manner, when the second determination module 204 determines the faulty cell based on the state information of all the cells, it is specifically used for:

Determine the average value of the output voltage of all cells;

It is determined that the cells whose output voltage is lower than the average value are faulty cells.

An electronic device is provided in an embodiment of the present application. As shown in FIG. 3 , the electronic device 300 shown in FIG. 3 includes: a processor 301 and a memory 303 . The processor 301 is connected to the memory 303 , for example, through a bus 302 . Optionally, the electronic device 300 may also include a transceiver 304 . It should be noted that in practical applications, the transceiver 304 is not limited to one, and the structure of the electronic device 300 does not constitute a limitation to the embodiments of the present application.

The processor 301 may be a CPU (Central Processing Unit, central processing unit), a general-purpose processor, a DSP (Digital Signal Processor, data signal processor), an ASIC (Application Specific Integrated Circuit, an application-specific integrated circuit), an FPGA (Field Programmable Gate Array, Field Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor 301 may also be a combination that realizes computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

The bus 302 may include a path to communicate information between the aforementioned components. The bus 302 may be a PCI (Peripheral Component Interconnect, Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture, Extended Industry Standard Architecture) bus or the like. The bus 302 can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 3, but it does not mean that there is only one bus or one type of bus.

The memory 303 may be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory, random access memory) or other types of storage devices that can store information and instructions. A dynamic storage device can also be an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory, a CD-ROM), or other CD-ROM storage, CD-ROM storage (including compressed CDs, Laser Disc, Optical Disc, Digital Versatile Disc, Blu-ray Disc, etc.), magnetic disk storage medium or other magnetic storage device, or any other capable of carrying or storing desired program code in the form of instructions or data structures and capable of being accessed by a computer medium, but not limited to this.

The memory 303 is used to store the application code for executing the solution of the present application, and the execution is controlled by the processor 301 . The processor 301 is configured to execute the application program code stored in the memory 303 to implement the content shown in the foregoing method embodiments.

Among them, electronic devices include but are not limited to: mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (such as in-vehicle navigation terminals), etc. Mobile terminals such as digital TVs, desktop computers, etc., as well as stationary terminals. It can also be a server, etc. The electronic device shown in FIG. 3 is only an example, and should not impose any limitation on the function and scope of use of the embodiments of the present disclosure.

Embodiments of the present application provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program runs on the computer, the computer can execute the corresponding content in the foregoing method embodiments.

It should be understood that although the various steps in the flowchart of the accompanying drawings are sequentially shown in the order indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless explicitly stated herein, the execution of these steps is not strictly limited to the order and may be performed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but may be executed at different times, and the execution sequence is also It does not have to be performed sequentially, but may be performed alternately or alternately with other steps or at least a portion of sub-steps or stages of other steps.

The above are only part of the embodiments of the present application. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as The protection scope of this application.

Claims (10)

1. A battery fault determination method is applied to a battery pack consisting of a plurality of same battery cells, and is characterized by comprising the following steps:

acquiring state information of a battery pack within a first preset time period, wherein the state information of the battery pack comprises output voltage and temperature variation of the battery pack;

determining whether a fault battery cell exists in the battery pack based on state information of the battery pack and acquired reference state information, wherein the reference state information comprises the lowest voltage and the highest temperature variation of the battery pack when the battery pack normally supplies power to a load under the condition that all the battery cells are healthy under the current electric quantity;

if so, acquiring state information of each battery cell, wherein the state information of each battery cell comprises the output voltage of the battery cell and a label, and the label is a preset number for each battery cell;

determining the faulty cell based on the state information of all cells;

and acquiring and outputting the label of the fault battery cell.

2. The method for determining battery failure according to claim 1, wherein the acquiring the state information of the battery pack within the first preset time period comprises:

acquiring the instantaneous voltage of the battery pack for a first preset number of times within a first preset time;

determining an output voltage of the battery pack based on all of the instantaneous voltages;

acquiring a first temperature of the battery pack at the starting moment of a first preset time and a second temperature of the battery pack at the ending moment of the first preset time;

determining a difference between the second temperature and the first temperature as the temperature change amount.

3. The battery fault determination method of claim 2, wherein said determining the output voltage of the battery pack based on all of the instantaneous voltages comprises:

deleting the maximum value and the minimum value from all the instantaneous voltages to obtain the instantaneous voltage after pretreatment;

determining the average of the preprocessed instantaneous voltages as a preprocessed average;

determining a median value from all of said instantaneous voltages;

and determining the average value of the median value and the preprocessing average value as the output voltage of the battery pack.

4. The battery failure determination method according to claim 1, before determining whether a failed cell exists in the battery pack based on the state information of the battery pack and the acquired reference state information, further comprising:

determining the current electric quantity of the battery pack;

and determining the basic state information based on the current electric quantity and a preset mapping relation between the electric quantity and the basic state information.

5. The battery failure determination method according to claim 1, wherein the determining whether a failed cell exists in the battery pack based on the state information of the battery pack and the acquired reference state information includes:

judging whether the output voltage of the battery pack is less than the lowest voltage or not;

if so, judging whether the temperature variation is larger than the maximum temperature variation;

and if so, determining that the fault battery cell exists.

6. The method of claim 1, wherein the obtaining the state information of any cell comprises:

acquiring the instantaneous voltage of the battery cell for a second preset number of times within a second preset time;

determining the average value of all the instantaneous voltages of any battery cell as the output voltage of any battery cell;

and obtaining the label of any battery cell.

7. The battery failure determination method of claim 1, wherein the determining the failed cell based on the status information of all cells comprises:

determining an average value of the output voltages of all the battery cells;

and determining the battery cell with the output voltage lower than the average value as a fault battery cell.

8. A battery management apparatus, comprising:

the battery pack state information acquisition module is used for acquiring the state information of the battery pack, and the state information of the battery pack comprises the output voltage and the temperature variation of the battery pack;

the first determining module is used for determining whether a fault battery cell exists in the battery pack based on state information of the battery pack and acquired reference state information, wherein the reference state information comprises the lowest voltage and the highest temperature variation of the battery pack when the battery pack normally supplies power to a load under the condition that all battery cells are healthy under the current electric quantity;

the battery cell state information acquisition module is used for acquiring state information of each battery cell, wherein the state information of each battery cell comprises the output voltage of the battery cell and a label, and the label is a preset number for each battery cell;

a second determining module, configured to determine the faulty battery cell based on the state information of all battery cells;

and the fault battery cell label acquisition module is used for acquiring the label of the fault battery cell.

9. An electronic device, comprising:

at least one processor;

a memory;

at least one application, wherein the at least one application is stored in the memory and configured to be executed by the at least one processor, the at least one application configured to: performing the battery fault determination method of any of claims 1-7.

10. A computer-readable storage medium, comprising: a computer program which can be loaded by a processor and which performs the method according to any of claims 1-7.

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