CN114355208A - Battery fault determination method and device, electronic equipment and storage medium - Google Patents
Battery fault determination method and device, electronic equipment and storage medium Download PDFInfo
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- CN114355208A CN114355208A CN202111678479.0A CN202111678479A CN114355208A CN 114355208 A CN114355208 A CN 114355208A CN 202111678479 A CN202111678479 A CN 202111678479A CN 114355208 A CN114355208 A CN 114355208A
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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
Technical Field
The present disclosure 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.
Background
The common battery is also called a battery pack, the battery pack is generally formed by connecting a plurality of battery cells in parallel or in series, and the voltage of each battery cell is lower, so that the battery packs with different output voltages and different electric quantities can be combined by adopting the mode to supply power for electronic equipment or electric automobiles.
However, in the actual use process, the practical life of each battery cell is not consistent, and therefore, some battery cells in the battery pack may be damaged earlier, and the damaged battery cells generally cannot output voltage, or the output voltage is smaller, so that the output voltage of the battery pack is lower or the battery pack generates heat, which easily affects the normal use of the electric vehicle or the electronic device.
Meanwhile, the damaged battery cell has certain potential safety hazard in the battery pack, and if the damaged battery cell cannot be found and replaced in time, a safety accident may occur, so that how to find and locate the damaged battery cell in time is a problem to be solved.
Disclosure of Invention
In order to facilitate timely finding and locating a damaged battery cell in a battery pack, the application provides, in particular, a battery fault determination method, apparatus, electronic device, and storage medium.
In a first aspect, the present application provides a method, an apparatus, an electronic device, and a storage medium for determining a battery fault, where the following technical solutions are adopted:
a battery fault determination method is applied to a battery pack consisting of a plurality of same battery cells and comprises 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.
By adopting the technical scheme, the electronic equipment can determine whether a fault electric core exists in the battery pack according to the output voltage and the temperature variation of the battery pack within a first preset time length and the reference state information, so that a user can find the fault electric core in time; meanwhile, after the faulty battery cell is determined to exist, the electronic device can acquire the output voltage of each battery cell, and then judge which battery cells are faulty, and then acquire the label of the faulty battery cell and output the label, so that a user can conveniently determine the specific position of the specific faulty battery cell.
In one possible implementation manner, the obtaining 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;
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.
By adopting the technical scheme, the output voltage of the battery pack is determined based on the plurality of instantaneous voltages of the battery pack obtained within the first preset time, the continuous working state of the battery pack can be reflected more accurately, and the influence caused by the instantaneous voltage fluctuation of the battery pack is reduced; meanwhile, the temperature change of the battery pack after the battery pack passes through the first preset time is obtained, and the working temperature condition of the battery pack can be more accurately reflected.
In one possible implementation, the determining the output voltage of the battery pack based on all the instantaneous voltages includes:
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.
By adopting the technical scheme, the average value obtained by removing the instantaneous voltage with the maximum value and the minimum value is used as the output voltage of the battery pack, and then the average value and the average value of the median of all the instantaneous voltages are used as the output voltage of the battery pack, so that the influence of the instantaneous voltage fluctuation of the battery pack on the obtained result is further reduced.
In one possible implementation manner, before determining whether a faulty cell exists in the battery pack based on the state information of the battery pack and the acquired reference state information, the method further includes:
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.
By adopting the technical scheme, when the current electric quantity of the battery pack is different, the output voltages of the battery pack are different, so that the current electric quantity of the battery pack is firstly determined, then the comparison is carried out based on the basic state information corresponding to the current electric quantity, and then whether a fault electric core exists in the battery pack is determined, and the accuracy of the determined result can be improved.
In one possible implementation manner, the determining whether a faulty 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.
By adopting the technical scheme, when the output voltage of the battery pack under the current electric quantity is smaller than the output voltage of the battery pack under the current electric quantity and when the battery cells are all healthy, the battery cells with faults can be judged, meanwhile, the temperature variation is adopted for further comparison, when the variation of the battery pack in the first preset time is larger than the maximum temperature variation, the battery cells with faults in the battery pack are determined again, and the reliability of the determined result can be further improved.
In a possible implementation manner, the instantaneous voltage of the battery cell of a second preset number of times is acquired 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.
By adopting the technical scheme, the real working condition of each battery cell can be reflected more accurately by acquiring a plurality of instantaneous voltages of each battery cell within the second preset time and then calculating the average value as the output voltage of the battery cell.
In one possible implementation manner, the determining the faulty battery cell based on the status information of all battery cells includes:
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.
By adopting the technical scheme, the output voltage of the battery cell with the fault is lower or the voltage is not output, so that the battery cell with the output voltage smaller than the average value has a high probability of being the fault battery cell.
In a second aspect, the present application provides a battery fault determination apparatus, which adopts the following technical solutions:
a battery failure determination apparatus applied to a battery pack composed of a plurality of identical electric cells, comprising:
the battery pack state information acquisition module is used for 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;
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 and outputting the label of the fault battery cell.
By adopting the technical scheme, the device can determine whether a fault electric core exists in the battery pack according to the output voltage and the temperature variation of the battery pack within a first preset time length and the reference state information, so that a user can find the fault electric core in time; meanwhile, after the existence of the fault battery cell is determined, the device can acquire the output voltage of each battery cell, further judge which battery cells are fault battery cells, acquire the label of the fault battery cell and then output the label, and a user can conveniently determine the specific position of the specific fault battery cell.
In a possible implementation manner, when the battery state information acquiring module acquires the state information of the battery, the battery state information acquiring module is specifically configured to:
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.
In a possible implementation manner, when the state information of the battery pack obtains the state information of the battery pack within the first preset time period, the method is specifically configured to:
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.
In one possible implementation, the apparatus further includes:
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.
In a possible implementation manner, when the first determining module determines whether a faulty battery cell exists in the battery pack based on the state information of the battery pack and the acquired reference state information, the first determining module is specifically configured to:
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.
In a possible implementation manner, when the cell state acquiring module acquires state information of any one of the cells, the cell state acquiring module is specifically configured to:
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.
In a possible implementation manner, when the second determining module determines the faulty battery cell based on the state information of all the battery cells, the second determining module is specifically configured to:
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.
In a third aspect, the present application provides an electronic device, which adopts the following technical solutions:
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: the above battery failure determination method is performed.
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 is stored which can be loaded by a processor and which performs the above-described battery failure determination method.
In summary, the present application includes at least one of the following beneficial technical effects:
the electronic equipment can firstly determine whether a fault electric core exists in the battery pack according to the output voltage and the temperature variation of the battery pack within a first preset time length and the reference state information, so that a user can find the fault electric core in time conveniently; meanwhile, after the faulty battery cell is determined, the electronic equipment can acquire the output voltage of each battery cell, further judge which battery cells are faulty, acquire the label of the faulty battery cell and then output the label, and a user can conveniently determine the specific position of the specific faulty battery cell;
when the current electric quantity of the battery pack is different, the output voltages of the battery pack are also different, so that the current electric quantity of the battery pack is firstly determined, and then comparison is carried out based on basic state information corresponding to the current electric quantity, so that whether a fault battery cell exists in the battery pack is further determined, and the accuracy of the determined result can be improved;
when the output voltage of the battery pack under the current electric quantity is smaller than the output voltage of the battery pack under the current electric quantity and when the battery cells are all healthy, the battery cells with faults can be judged, meanwhile, the temperature variation is adopted for further comparison, when the variation of the battery pack within the first preset time is larger than the maximum temperature variation, the battery cells with faults in the battery pack are determined, and the reliability of the determined result can be further improved.
Drawings
FIG. 1 is a schematic flow chart diagram of a battery fault determination method in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a battery failure determination apparatus 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 Description
The present application is described in further detail below with reference to figures 1-3.
A person skilled in the art, after reading the present specification, may make modifications to the present embodiments as necessary without inventive contribution, but only within the scope of the claims of the present application are protected by patent laws.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship, unless otherwise specified.
The embodiment of the application provides a battery fault determination method, which is executed by electronic equipment and is applied to a battery pack consisting of a plurality of same battery cells; referring to fig. 1, the method includes step S101, step S102, step S103, step S104, and step S105, wherein:
step S101, acquiring state information of the battery pack, wherein the state information of the battery pack comprises output voltage and temperature variation of the battery pack.
In this embodiment, the output voltage of the battery pack may be obtained by using a voltage measurement chip or a digital voltage measurement apparatus, a measurement result obtained by measuring only once may be used as the output voltage, or a result obtained by measuring multiple times may be averaged, and a specific manner of obtaining the output voltage of the battery pack is described in detail in the following embodiments. And in a first preset time, acquiring the temperature of the battery pack at least two moments through the temperature sensor to obtain the temperature variation of the battery pack.
In practice, when a faulty cell exists in the battery pack, the output voltage of the cell decreases or the cell does not output voltage, so that the output voltage of the battery pack fluctuates, that is, the voltage of the battery pack is small. When the battery cell is damaged, the battery cell may generate heat inside the battery because the battery cell itself has a resistance value, and thus, the temperature of the battery pack may be greatly changed.
Step S102, whether a fault electric core exists in the battery pack is determined based on the state information of the battery pack and the 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 electric cores are healthy under the current electric quantity.
Specifically, when the present charge amount, i.e., the remaining charge amount, is different for the same battery pack, the output voltage when it normally operates is also different. Therefore, reference state information corresponding to the battery pack at the current electric quantity is determined based on the electric quantity of the current storage battery, and then whether a faulty cell exists in the battery pack is determined based on the acquired state information of the battery pack and the reference state information.
Step 103, if a faulty cell exists, acquiring state information of each cell, where the state information of each cell includes an output voltage of the cell and a tag, and the tag is a number preset for each cell.
In the embodiment of the present application, for any battery cell, the output voltage may be an average value obtained by measuring multiple times in a time period, or may be an instantaneous value at any time. For the label, it is the serial number of electric core that the position that sets up to every electric core is preset in fact, and the label of every electric core is different, and the position of the corresponding electric core is confirmed to the user's serial number of being convenient for.
And step S104, determining a fault battery cell based on the state information of all the battery cells.
In this embodiment, the acquired state information of all the battery cells is comprehensively determined, and the battery cells with different state information are determined to be faulty battery cells, and a specific method for determining the faulty battery cells is described in detail in the following embodiments.
And S105, acquiring and outputting the label of the fault battery cell.
In the embodiment of the application, after all the fault battery cells are determined to exist, the label of each fault battery cell is obtained and then output; further, the placement position of each cell in the battery pack or the content of the tag needs to be set in the cell body, so that the user can determine the specific positions of all the faulty cells based on all the output tags.
The electronic equipment can firstly determine whether a fault electric core exists in the battery pack according to the output voltage and the temperature variation of the battery pack within a first preset time length and the reference state information, so that a user can find the fault electric core in time conveniently; meanwhile, after the faulty battery cell is determined to exist, the electronic device can acquire the output voltage of each battery cell, and then judge which battery cells are faulty, and then acquire the label of the faulty battery cell and output the label, so that a user can conveniently determine the specific position of the specific faulty battery cell.
Further, step S101 may include step S1O11 (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:
S1O11, acquiring the instantaneous voltage of the battery pack for a first preset number of times within a first preset time;
step S1O12, determining the output voltage of the battery pack based on all the instantaneous voltages.
Specifically, the output voltage of the battery pack within the first preset time period is obtained, the continuous working state of the battery pack can be reflected more accurately, meanwhile, the instantaneous voltage of the preset times is obtained within the first preset time period, and the probability of inaccurate measurement results caused by the fluctuation of the instantaneous voltage of the battery pack can be further reduced.
The specific duration of the first preset duration and the specific times of the preset times are not limited in this embodiment, as long as the continuous working state of the battery pack is determined more accurately, and it is further determined whether a faulty battery cell exists in the battery pack.
S1O13, acquiring a first temperature of the battery pack at the starting time of a first preset time and a second temperature of the battery pack at the ending time of the first preset time;
and step S1O14, determining the difference value between the second temperature and the first temperature as the temperature variation.
Specifically, the timing of acquiring the first temperature of the battery pack is started, the second temperature of the battery pack is acquired after a first preset time period, and then the difference value between the first temperature and the second temperature is determined as the temperature variation of the battery pack.
Further, step S1012 may include step SA1 (not shown), step SA2 (not shown), step SA3 (not shown), and step SA4 (not shown), wherein:
and step SA1, deleting the maximum value and the minimum value from all the instantaneous voltages to obtain the preprocessed instantaneous voltages.
Specifically, in order to obtain a more accurate continuous output voltage of the battery pack, the maximum value and the minimum value of the acquired plurality of instantaneous voltages are deleted, and a subsequent statistical process is not performed, so that a data error caused by instantaneous voltage fluctuation of the battery pack can be reduced.
Step SA2, determining the average of the preprocessed instantaneous voltages as the preprocessed average.
Specifically, for example, if the instantaneous voltages are 5 and 30V, 32V, 33V, 31V and 29V, respectively, two data of 33V and 29V should be deleted, and 30V, 32V and 31V should be averaged to obtain an average value of 31V.
Step SA3, determining a median value from all instantaneous voltages;
and step SA4, determining the average value of the median value and the preprocessing average value as the output voltage of the battery pack.
Specifically, the median values in all the instantaneous voltages and the obtained average values are averaged again to obtain average values of the median values and the average values, and then the finally obtained average values can more accurately represent the voltage values of the battery pack which are continuously and stably output within the first preset time period.
In the above example, the median value is 31V, and the average value obtained after the maximum sum minimum value is removed is 31V, so that the final averaging process is performed based on 31V and 31V, and the output voltage of the battery pack obtained is also 31V.
Further, step SB1 (not shown in the figure) and step SB2 (not shown in the figure) are also included before step S102, in which:
step SB1, the current charge level of the battery pack is determined.
Specifically, the current electric quantity information of the battery pack can be obtained by measuring the electric quantity detection device or the electric quantity detection chip, the battery pack is required to be always externally connected with the electric quantity detection device or the electric quantity detection chip, and then the electronic device reads the data of the electric quantity detection device or the electric quantity detection chip to obtain the current electric quantity of the battery pack, namely the residual electric quantity of the battery pack.
And step SB2, determining the basic state information based on the current electric quantity and the preset mapping relation between the electric quantity and the basic state information.
Specifically, a mapping relation between the battery pack and basic state information under different electric quantities is preset, for example, when the electric quantity of the battery pack is 70%, the basic state information may be output voltage 30V and temperature variation is 5 ℃; when the electric quantity of the battery pack is 60%, the basic state information can be output voltage 29V, and the temperature variation is 3 ℃; for the specific basic state information corresponding to the specific electric quantity, no specific limitation is made in the 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 smaller than the lowest voltage;
step S1022, if yes, whether the temperature variation is larger than the maximum temperature variation is judged;
and step S1023, if yes, determining that a fault battery cell exists.
Specifically, whether the output voltage of the battery pack is smaller than the lowest voltage or not and whether the temperature variation is larger than the highest temperature variation or not are judged, the judgment can be performed simultaneously or sequentially, and finally, only when the temperature variation is larger than the highest temperature variation and the output voltage is smaller than the lowest voltage, the battery cell with the fault in the battery pack can be determined.
When the output voltage of the battery pack under the current electric quantity is smaller than the output voltage of the battery pack under the current electric quantity and when the battery cells are all healthy, the battery cells with faults can be judged, meanwhile, the temperature variation is adopted for further comparison, when the variation of the battery pack within the first preset time is larger than the maximum temperature variation, the battery cells with faults in the battery pack are determined, and the reliability of the determined result can be further improved.
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), in which:
step S1031, obtaining the instantaneous voltage of the battery cell for a second preset number of times within a second preset time;
step S1032 determines an average value of all instantaneous voltages of any one of the battery cells as an output voltage of any one of the battery cells.
Specifically, a plurality of instantaneous voltages of each battery cell are acquired within a second preset time period, and then for each battery cell, an average value is calculated based on the acquired instantaneous voltages of the battery cells and is used as an output voltage of the battery cell within the second preset time period, so that the accuracy of an acquired result can be improved.
Step S1033, a label of any one of the battery cells is acquired.
Specifically, for the tag, the tag should be preset for each battery cell, and the tag may be set by using a device or a loop for measuring the output voltage of each battery cell, so that when the output voltage of each battery cell is obtained, the tag of each battery cell is also obtained at the same time. The output voltage of each cell may also be sequentially obtained according to the set words, and meanwhile, the label of each cell is labeled in the set order, for example, the battery pack includes 10 cells in total, the output voltages of the cells are sequentially obtained according to the preset order from 1 to 10, and after the output voltage of the first cell is obtained, the output voltage and the label 1 are simultaneously used as the state information of the cell. Of course, other manners of obtaining the state information of the battery cell may also be adopted, which is not specifically limited in this embodiment of the application, as long as it is convenient to obtain the output voltage of each battery cell and the tag.
Further, step S104 may include step S1041 (not shown in the figure) and step S1042 (not shown in the figure), wherein:
step S1041, determining an average value of output voltages of all the battery cells;
step S1042, determining the cell with the output voltage lower than the average value as a faulty cell.
Specifically, after the output voltage of each cell is obtained, the average value of the output voltages of all the cells is determined, and generally, the specifications of the cells applied to the same battery pack are the same, so that there is a high probability that a voltage having an output voltage lower than the average value has a fault after the average value of the output voltages is obtained.
The above embodiments describe a battery fault determination method from the perspective of a method flow, and the following embodiments describe a battery fault determination apparatus from the perspective of a virtual module or a virtual unit, which are described in detail in the following embodiments.
The embodiment of the application provides a battery fault determination device, which is applied to a battery pack consisting of a plurality of same battery cells; as shown in fig. 2, the battery failure determination apparatus may specifically include a battery pack state information acquisition module 201, a first determination module 202, a cell state information acquisition module 203, a second determination module 204, and a failed cell tag acquisition module 205, where:
a battery pack state information acquiring module 201, configured to acquire state information of a battery pack within a first preset time period, where the state information of the battery pack includes output voltage and temperature variation of the battery pack;
the first determining module 202 is configured to determine whether a faulty cell exists in the battery pack based on state information of the battery pack and acquired reference state information, where the reference state information includes a lowest voltage and a highest temperature variation when the battery pack normally supplies power to a load in a state where all cells are healthy under current electric quantity;
the battery cell state information acquiring module 203 is configured to acquire state information of each battery cell, where the state information of each battery cell includes an output voltage of the battery cell and a tag, and the tag is a number preset for each battery cell;
a second determining module 204, configured to determine a faulty cell based on the state information of all cells;
and a faulty cell tag obtaining module 205, configured to obtain and output a tag of a faulty cell.
In a possible implementation manner, when the battery state information acquiring module 201 acquires the state information of the battery within the first preset time period, specifically, the battery state information acquiring module is configured to:
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 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;
and determining the difference value between the second temperature and the first temperature as the temperature change amount.
In a possible implementation manner, when the battery state information acquiring module 201 acquires the state information of the battery, it is specifically configured to:
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 instantaneous voltages after pretreatment as a pretreatment average value;
determining a median value from all transient voltages;
and determining the average value of the median value and the preprocessing average value as the output voltage of the battery pack.
In one possible implementation, the apparatus 200 further includes:
determining the current electric quantity of the battery pack;
and determining the basic state information based on the current electric quantity and the preset mapping relation between the electric quantity and the basic state information.
In a possible implementation manner, when the first determining module 202 determines whether a faulty cell exists in the battery pack based on the state information of the battery pack and the acquired reference state information, specifically, the first determining module is configured to:
judging whether the output voltage of the battery pack is less than the lowest voltage or not;
if yes, judging whether the temperature variation is larger than the maximum temperature variation;
and if so, determining that the fault battery cell exists.
In a possible implementation manner, when the cell state acquiring module 203 acquires the state information of any one of the cells, the cell state acquiring module is specifically configured to:
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 instantaneous voltages of any battery cell as the output voltage of any battery cell;
and obtaining a label of any battery cell.
In a possible implementation manner, when the second determining module 204 determines a faulty battery cell based on the state information of all the battery cells, specifically, the second determining module is configured to:
determining the average value of the output voltages of all the battery cores;
and determining the battery cell with the output voltage lower than the average value as a fault battery cell.
In an embodiment of the present application, an electronic device is provided, as shown in fig. 3, where the electronic device 300 shown in fig. 3 includes: a processor 301 and a memory 303. Wherein processor 301 is coupled to memory 303, such as via bus 302. Optionally, the electronic device 300 may also include a transceiver 304. It should be noted that the transceiver 304 is not limited to one in practical applications, and the structure of the electronic device 300 is not limited to the embodiment of the present application.
The Processor 301 may be a CPU (Central Processing Unit), a general-purpose Processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor 301 may also be a combination of computing functions, e.g., comprising one or more microprocessors, a combination of a DSP and a microprocessor, or the like.
The Memory 303 may be a ROM (Read Only Memory) or other type of static storage device that can store static information and instructions, a RAM (Random Access Memory) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), a magnetic Disc storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these.
The memory 303 is used for storing application program codes for executing the scheme of the application, and the processor 301 controls the execution. The processor 301 is configured to execute application program code stored in the memory 303 to implement the aspects illustrated in the foregoing method embodiments.
Among them, electronic devices include but are not limited to: mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. But also a server, etc. The electronic device shown in fig. 3 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present disclosure.
The present application provides a computer-readable storage medium, on which a computer program is stored, which, when running on a computer, enables the computer to execute the corresponding content in the foregoing method embodiments.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present 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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| CN202111678479.0A CN114355208A (en) | 2021-12-31 | 2021-12-31 | Battery fault determination method and device, electronic equipment and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024065710A1 (en) * | 2022-09-30 | 2024-04-04 | 宁德时代新能源科技股份有限公司 | Battery coding method and apparatus, electronic device, and battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024065710A1 (en) * | 2022-09-30 | 2024-04-04 | 宁德时代新能源科技股份有限公司 | Battery coding method and apparatus, electronic device, and battery |
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