CN108333526B

CN108333526B - Battery capacity detection method and device

Info

Publication number: CN108333526B
Application number: CN201810090333.6A
Authority: CN
Inventors: 马东辉; 柳志民
Original assignee: Beijing CHJ Automotive Information Technology Co Ltd
Current assignee: Beijing Chehejia Automobile Technology Co Ltd
Priority date: 2018-01-30
Filing date: 2018-01-30
Publication date: 2021-01-26
Anticipated expiration: 2038-01-30
Also published as: CN108333526A

Abstract

The invention discloses a battery capacity detection method and device, relates to the technical field of battery detection, and mainly aims to reduce the battery capacity detection time and improve the detection efficiency. The method of the invention comprises the following steps: acquiring a first open-circuit voltage and a first temperature of a battery; determining the charge value of the battery through a charge state matrix according to the first open-circuit voltage and the first temperature, and recording the charge value as a first charge value; acquiring a second open-circuit voltage and a second temperature of the battery after the battery is charged or discharged; determining the charge value of the charged or discharged battery according to the second open-circuit voltage and the second temperature through the charge state matrix, and recording the charge value as a second charge value; and determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery, wherein the changed electric quantity of the battery is the electric quantity changed in the discharging process or the charging process of the battery. The invention is used for detecting the capacity of the battery.

Description

Battery capacity detection method and device

Technical Field

The embodiment of the disclosure relates to the technical field of battery detection, in particular to a battery capacity detection method and device.

Background

With the vigorous development of new energy vehicles, the use of electric vehicles and hybrid vehicles is also gradually increased. In an electric vehicle, a battery system is particularly important for an electric vehicle as an energy supply device for power of the electric vehicle, and particularly, the capacity of a power battery in the electric vehicle largely determines the driving range of the electric vehicle, so that the battery capacity is increasingly emphasized by automobile battery manufacturers.

Currently, in the field of electric vehicles, after a power battery is produced in a production line, the battery capacity of the power battery needs to be detected. Generally, when detecting the battery capacity, full-charge detection is generally adopted, that is, the battery is charged to the highest cut-off voltage, then discharged to the lowest voltage in a constant current manner, and the total capacity of the current battery is determined according to the electric quantity in the discharging process. However, in practical applications, since the capacity of the power battery of the electric vehicle is large, a large amount of time is consumed in the charging and discharging processes, and especially when a large number of batteries are required to be detected, the time consumption for detecting the battery capacity is large, which affects the detection efficiency of the battery capacity.

Disclosure of Invention

In view of the foregoing problems, embodiments of the present disclosure provide a method and an apparatus for detecting battery capacity, and mainly aim to reduce time consumption in a battery capacity detection process and improve battery capacity detection efficiency.

In order to solve the above technical problem, in a first aspect, an embodiment of the present disclosure provides a battery capacity detection method, including:

acquiring a first open-circuit voltage and a first temperature of a battery;

determining the charge value of the battery according to the first open-circuit voltage and the first temperature through a charge state matrix, and recording the charge value as a first charge value, wherein the charge value is a capacity parameter for measuring the charge state of the battery, and the charge state matrix is a matrix representing the corresponding relation among the temperature, the open-circuit voltage and the charge value of the battery;

acquiring a second open-circuit voltage and a second temperature of the battery after the battery is charged or discharged;

determining the charge value of the charged or discharged battery according to the second open-circuit voltage and the second temperature through the charge state matrix, and recording the charge value as a second charge value;

and determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery, wherein the changed electric quantity of the battery is the electric quantity changed in the discharging process or the charging process of the battery.

Optionally, before the obtaining the first open-circuit voltage and the first temperature of the battery, the method further includes:

acquiring open-circuit voltages corresponding to different charge values of a sample battery at different temperatures;

and establishing a charge state matrix according to the corresponding relation among the charge value, the open-circuit voltage and the temperature, wherein the charge state matrix comprises the open-circuit voltage and the corresponding charge value thereof at different temperatures.

Optionally, the obtaining of the open-circuit voltages corresponding to different charge values of the sample battery at different temperatures includes:

when a sample battery is placed at a plurality of different preset temperatures, controlling a charge and discharge test device to respectively perform a plurality of times of charge or discharge operations on the sample battery;

and respectively acquiring the open-circuit voltage and the corresponding charge value of the sample battery after the sample battery is charged or discharged at different preset temperatures through a battery management system.

Optionally, after determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery, the method further includes:

when the total capacity of the battery is greater than or equal to a preset rated capacity, determining that the battery is qualified;

optionally, the determining the total capacity of the battery according to the first charge value, the second charge value, and the changed electric quantity of the battery includes:

performing difference calculation on the first charge value and the second charge value to obtain a charge difference value;

and carrying out quotient calculation on the changed electric quantity and the charge difference value to obtain the total capacity of the battery.

Optionally, before determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery, the method further includes:

and acquiring the changed electric quantity of the battery in the process of charging or discharging the battery.

Optionally, in the process of charging or discharging the battery, acquiring the changed electric quantity of the battery includes:

acquiring the charging or discharging current of the battery in the charging or discharging process of the battery;

and performing integral calculation on the charging or discharging current to obtain the change electric quantity of the battery.

Optionally, the control production line charging and discharging test device charges or discharges the battery at a preset charging or discharging rate, and includes:

and controlling production line charging and discharging test equipment to charge or discharge the battery at a preset charging or discharging rate until the voltage of the battery reaches a target voltage.

Optionally, before the obtaining of the second open-circuit voltage and the second temperature of the battery, the method further includes:

controlling a battery-standing device so as to stand the battery for a preset time after the battery is charged or discharged;

the obtaining a second open circuit voltage and a second temperature of the battery includes:

and acquiring a second open-circuit voltage and a second temperature of the battery after the battery is kept still for a preset time.

In a second aspect, an embodiment of the present disclosure further provides a battery capacity detection apparatus, including:

the first acquisition unit is used for acquiring a first open-circuit voltage and a first temperature of the battery;

the first determining unit is used for determining the charge value of the battery according to the first open-circuit voltage and the first temperature acquired by the first acquiring unit through a charge state matrix, and recording the charge value as a first charge value, wherein the charge value is a capacity parameter for measuring the charge state of the battery, and the charge state matrix is a matrix representing the corresponding relation among the temperature, the open-circuit voltage and the charge value of the battery;

a second obtaining unit configured to obtain a second open-circuit voltage and a second temperature of the battery after the battery is charged or discharged;

a second determining unit, configured to determine, according to the second open-circuit voltage and the second temperature obtained by the second obtaining unit, a charge value of the charged or discharged battery through the state of charge matrix, and record the charge value as a second charge value;

and the third determining unit is used for determining the total capacity of the battery according to the first charge value acquired by the first determining unit, the second charge value determined by the second determining unit and the changed electric quantity of the battery, wherein the changed electric quantity of the battery is the electric quantity changed in the discharging process or the charging process of the battery.

Optionally, the apparatus further comprises:

the third acquisition unit is used for acquiring open-circuit voltages corresponding to different charge values of the sample battery at different temperatures;

and the establishing unit is used for establishing a charge state matrix according to the corresponding relation among the charge value, the open-circuit voltage and the temperature acquired by the third acquiring unit, wherein the charge state matrix comprises the open-circuit voltage and the charge value corresponding to the open-circuit voltage at different temperatures.

Optionally, the third obtaining unit includes:

and the acquisition module is used for respectively acquiring the open-circuit voltage and the corresponding charge value of the sample battery at different preset temperatures each time through a battery management system.

Optionally, the third determining unit includes:

the first calculation module is used for performing difference calculation on the first charge value and the second charge value to obtain a charge difference value;

and the second calculation module is used for carrying out quotient calculation on the changed electric quantity and the charge difference value calculated by the first calculation module to obtain the total capacity of the battery.

Optionally, the apparatus further comprises:

and the fourth acquisition unit is used for acquiring the changed electric quantity of the battery in the process of charging or discharging the battery.

Optionally, the fourth obtaining unit includes:

the acquisition module is used for acquiring the charging or discharging current of the battery in the charging or discharging process of the battery;

and the calculation module is used for carrying out integral calculation on the charging or discharging current acquired by the acquisition module to obtain the variation electric quantity of the battery.

Optionally, the apparatus further comprises:

the second obtaining unit is specifically configured to obtain a second open-circuit voltage and a second temperature of the battery after the battery is kept still for a preset time.

In order to achieve the above object, according to a third aspect of embodiments of the present disclosure, there is provided a storage medium including a stored program, wherein when the program runs, a device on which the storage medium is located is controlled to execute the above battery capacity detection method.

In order to achieve the above object, according to a fourth aspect of embodiments of the present disclosure, there is provided an electronic device including one or more processors and a memory, wherein the memory is configured to store one or more programs, which when executed by the one or more processors, cause the one or more processors to implement the battery capacity detection method as described above.

By means of the technical scheme, the battery capacity detection method and the battery capacity detection device provided by the embodiment of the disclosure solve the problems that in the prior art, when the battery capacity is detected, the time consumption is large, and the detection efficiency is influenced. The method comprises the steps of firstly, obtaining a first open-circuit voltage and a first temperature of a battery, and then determining a first charge value of the battery according to the first open-circuit voltage and the first temperature and through a charge state matrix; then, after the battery is charged or discharged, a second open-circuit voltage and a second temperature of the battery are obtained, and a second charge value of the charged or discharged battery is determined through the state of charge matrix according to the second open-circuit voltage and the second temperature; and finally, determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery, thereby solving the problem of overlarge time consumption of full-charge-discharge battery capacity detection in the prior art. In the embodiment of the disclosure, the first charge value of the battery is determined in the state of charge matrix through the first open-circuit voltage and the first temperature, the second charge value of the battery is determined in the state of charge matrix through the second open-circuit voltage and the second temperature, and the influence of the temperature on the charge value of the battery is considered, so that the accuracy of the first charge value and the second charge value is improved, further, a data guarantee is provided for the subsequent calculation of the total capacity of the battery, and the accuracy of the detection result of the capacity of the battery is integrally improved. Meanwhile, the total capacity of the battery is calculated through the first charge value, the second charge value and the change electric quantity of the battery, the charging process in the full-charge-discharge type battery capacity detection process is avoided, the time consumption in the discharging or charging process is reduced, the time required by the battery capacity detection process can be reduced on the whole, and the battery capacity detection efficiency is improved.

The foregoing description is only an overview of the embodiments of the present disclosure, and in order to make the technical means of the embodiments of the present disclosure more clearly understood, the embodiments of the present disclosure may be implemented in accordance with the content of the description, and in order to make the foregoing and other objects, features, and advantages of the embodiments of the present disclosure more clearly understood, the following detailed description of the embodiments of the present disclosure is given.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the embodiments of the present disclosure. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 shows a flow chart of a battery capacity detection method provided by an embodiment of the present disclosure;

fig. 2 shows a flow chart of another battery capacity detection method provided by the embodiment of the disclosure;

fig. 3 shows a block diagram of a battery capacity detection apparatus provided by an embodiment of the present disclosure;

fig. 4 shows a block diagram of another battery capacity detection apparatus provided in the embodiment of the present disclosure.

Detailed Description

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

In order to improve the accuracy of battery capacity detection, an embodiment of the present disclosure provides a battery capacity detection method applied to a client, as shown in fig. 1, the method including:

101. a first open circuit voltage and a first temperature of the battery are obtained.

Generally, after the production of the battery in the production line is completed, the battery is currently subjected to some performance tests, and in the process, the battery has a certain amount of electricity, so in the embodiment of the present disclosure, the first open-circuit voltage and the first temperature of the battery may be obtained after the battery is subjected to the relevant performance tests, and of course, may also be obtained at other times, which is not specifically limited herein. Meanwhile, the obtaining of the first open-circuit voltage of the battery in this step may be performed by any acquisition device in the prior art, such as a battery management device. The first open-circuit voltage described in the embodiments of the present disclosure may be understood as a voltage value across the battery in an unloaded open-circuit state of the battery.

In addition, in the embodiment of the present disclosure, the first temperature may be understood as a current surface temperature of the battery. During the operation of the battery, the battery capacity inside the battery is easily affected by the external temperature or the temperature of the battery itself, for example, when the external temperature is low, or the battery is continuously discharged to generate a large amount of heat, the battery capacity of the battery itself is affected. In the embodiment of the present disclosure, the effect of temperature on the battery capacity is just considered, and therefore, when the first open-circuit voltage of the battery is obtained, the surface temperature of the battery is also required to be obtained, where the obtaining manner of the first temperature may be collected by an external thermal sensor, or may be collected by a battery system management device in the prior art, and of course, the selection of a specific collecting manner and a collector may be selected according to actual needs, and no specific limitation is made herein.

102. And determining the charge value of the battery through a charge state matrix according to the first open-circuit voltage and the first temperature, and recording the charge value as a first charge value.

The charge value according to the embodiment of the disclosure may be understood as a capacity parameter when measuring the state of charge of the battery, and the state of charge matrix is a matrix representing a corresponding relationship among the temperature, the open-circuit voltage, and the charge value of the battery.

Specifically, in the battery field, there are many different parameters to characterize the State of the battery, one of which is the State of Charge (SOC) in this step, which is also called the remaining capacity, and it represents the ratio of the remaining capacity of the battery after a period of use or after a long-term standing to the capacity of the battery in the fully charged State, usually expressed as a percentage. The SOC value, i.e., the charge value according to the embodiment of the present disclosure, is in a range of 0 to 1, and indicates that the battery is completely discharged when the SOC is 0 and indicates that the battery is completely charged when the SOC is 1.

Because the state of charge matrix includes the relationship between different charge values and open-circuit voltages at different temperatures, after the first open-circuit voltage and the first temperature of the battery are obtained in step 101, the state of charge matrix can be used to search the charge value corresponding to the first open-circuit voltage at the first temperature, and the found charge value corresponding to the first open-circuit voltage is recorded as the first charge value. Generally, after the assembly of the battery on the production line is completed, the internal charge value, i.e. the SOC value, is about 30%, and of course, according to the difference of the actual situation, the internal actual charge value may be greater than or less than 30%, and here, the specific value of the determined first charge value is not specifically limited, but is determined according to the actual situation.

103. And acquiring a second open-circuit voltage and a second temperature of the battery after the battery is charged or discharged.

It should be noted that, since the method described in the embodiment of the present disclosure is to improve the detection efficiency of the battery capacity, the time consumption is reduced. Therefore, in the embodiment of the present disclosure, the time of the discharging process or the time of the charging process may be selected according to actual needs during the process of discharging or charging the battery. Specifically, a charging and discharging time may be preset, and the obtaining of the second open-circuit voltage and the second temperature of the battery may be performed after the charging or discharging.

Further, the description of the second open circuit voltage in this step is identical to the description of the first open circuit voltage in the aforementioned step 101, and the only difference is that the present second open circuit voltage is the open circuit voltage obtained after the battery has been charged or discharged. The description of the second temperature in this step is also the same as the description of the first temperature in the previous step 101, except that the second temperature is the surface temperature of the battery after the charging or discharging operation. Specifically, the acquisition manner of the second open-circuit voltage and the acquisition manner of the second temperature are the same as the acquisition manner of the first open-circuit voltage and the first temperature in the previous step, and are not described in detail herein.

104. And determining the charge value of the discharged battery through the charge state matrix according to the second open-circuit voltage and the second temperature, and recording the charge value as a second charge value.

As described in step 102, the state of charge matrix includes the corresponding charge values of different open-circuit voltages at different temperatures. Therefore, after the second open-circuit voltage and the second temperature are obtained in step 103, the charge value corresponding to the second open-circuit voltage at the second temperature, that is, the second charge value, can be found according to the state of charge matrix.

105. Determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery

The changed electric quantity of the battery in the step is the electric quantity changed in the discharging process or the charging process of the battery. In the embodiment of the present disclosure, the changing electric quantity may specifically be a consumed electric quantity of the battery corresponding to the discharging process, or an increased electric quantity of the battery corresponding to the charging process. Specifically, the determination may be made according to whether the charging process or the discharging process is selected in the foregoing steps 101-104.

After the charge values before and after the battery is discharged are determined in the foregoing step 101-104, that is, the first charge value and the second charge value, the change of the charge value of the battery after the battery is discharged or charged can be determined, and since the change of the charge value of the battery can show the relationship between the change electric quantity of the battery and the total capacity from the side surface, the change of the charge value of the battery can be determined according to the first charge value and the second charge value, and then the total capacity of the battery can be determined according to the relationship between the change of the charge value and the change electric quantity of the battery.

The battery capacity detection method provided by the embodiment of the disclosure solves the problems that in the prior art, when the battery capacity is detected, the time consumption is large, and the detection efficiency is influenced. Compared with the prior art, the embodiment of the disclosure determines the first charge value of the battery in the state of charge matrix through the first open-circuit voltage and the first temperature, determines the second charge value of the battery in the state of charge matrix through the second open-circuit voltage and the second temperature, and considers the influence of the temperature on the charge value of the battery, so that the accuracy of the first charge value and the second charge value is improved, further, the data guarantee is provided for the subsequent calculation of the total capacity of the battery, and the accuracy of the detection result of the capacity of the battery is integrally improved. Meanwhile, the total capacity of the battery is calculated through the first charge value, the second charge value and the change electric quantity of the battery, the charging process in the full-charge-discharge type battery capacity detection process is avoided, the time consumption in the discharging or charging process is reduced, the time required by the battery capacity detection process can be reduced on the whole, and the battery capacity detection efficiency is improved.

Further, as a refinement and an extension of the embodiment shown in fig. 1, an embodiment of the present disclosure further provides another battery capacity detection method, as shown in fig. 2, the method includes the following specific steps:

201. and acquiring open-circuit voltages corresponding to different charge values of the sample battery at different temperatures.

In the embodiments of the present disclosure, the descriptions of the charge value, the temperature, the open-circuit voltage, and the like are the same as those in the foregoing embodiments, and are not repeated herein.

Since the method for detecting battery capacity according to the embodiment of the present disclosure is performed based on a state of charge matrix, in the embodiment of the present disclosure, a state of charge matrix is first constructed by selecting a sample battery and according to a relationship between different charge values and open-circuit voltages at different temperatures of the sample battery. Therefore, in the step, the relation between the charge value and the open-circuit voltage of the sample battery needs to be tested at different temperatures, and the relation among the temperature, the charge value and the open-circuit voltage is obtained. It should be noted that the method for detecting battery capacity according to the embodiment of the present disclosure may be performed based on two situations, namely, a discharging process and a charging process, specifically, the selected charging process and the selected discharging process may be selected according to an actual situation, and are not limited specifically herein. In the embodiments of the present disclosure, for convenience of description, the battery capacity detection method according to the embodiments of the present disclosure is described mainly based on a discharge process of a battery.

The manner of obtaining the temperature, the charge value and the open-circuit voltage in the sample battery in this step may include: firstly, placing a sample battery at a plurality of different preset temperatures, and then respectively carrying out a plurality of times of discharging operations on the sample battery through a charging and discharging test device; in the discharging process, the open-circuit voltage and the corresponding charge value of the sample battery discharged at different preset temperatures are respectively obtained through a battery management system, for example, when the current temperature of the battery is 25 ℃, the battery can be subjected to multiple discharging operations, and the open-circuit voltage and the corresponding charge value of the battery after each discharging operation are obtained. Therefore, the sample battery can obtain different open-circuit voltages and corresponding charge values at different temperatures. In this step, the sample battery may be manually placed at different temperatures, and the charge and discharge test device is manually controlled to perform the charging or discharging operation on the battery for a plurality of times, or of course, a preset battery control device may be used to place the battery at different temperatures through a preset control command, and the charge and discharge test device is controlled to perform the charging and discharging operation on the battery. In particular, the actual situation may be the standard.

In addition, in this step, in the process of obtaining the temperature, the charge value, and the open-circuit voltage of the sample battery, since the sample battery needs to be discharged at different temperatures for many times, since the battery generates heat after each discharge and has a floating numerical value at the open-circuit voltage within a period of time after the discharge, in order to ensure the accuracy of the obtained numerical values of the temperature, the charge value, and the open-circuit voltage, the battery may be left standing for a period of time after each discharge, such as 0.5 hour, after the temperature is recovered, the current three parameters of the sample battery may be obtained after the open-circuit voltage is stabilized. When the battery discharged after charging is placed statically, the battery can be controlled to be preset through a special device, if the battery management equipment is used for placing the battery statically, the battery can also be placed statically manually, so that the temperature of the battery is stable, and the battery can be specifically selected according to actual conditions. Of course, when the battery is subjected to a discharging operation and the current temperature change of the battery is determined to be small, the battery may not be required to be left standing, so as to improve the detection speed of the detection capacity. In addition, in the method in this step, in order to further ensure the accuracy of the acquired parameters, i.e., the temperature, the charge value, and the open-circuit voltage, a plurality of sample cells may be selected to perform the method in this step, and the plurality of samples may be averaged to ensure the accuracy of the acquired temperature, the charge value, and the open-circuit voltage of the sample cells, so as to provide a data guarantee for the accuracy of the subsequent state of charge matrix.

202. And establishing a charge state matrix according to the corresponding relation among the charge value, the open-circuit voltage and the temperature.

In the embodiment of the present disclosure, the description of the state of charge matrix, i.e., SOC, is consistent with the description of step 102 in the previous embodiment. Based on the fact that the state of charge matrix includes the open-circuit voltage and the corresponding charge value thereof at different temperatures, in the embodiment of the present disclosure, after the relationship between the three parameters is obtained by performing the discharge test on the sample battery in step 201, a state of charge matrix based on the temperature and the open-circuit voltage can be established by summarizing the corresponding relationship between the charge value and the open-circuit voltage at different temperatures in this step. Specific examples can be shown in table 1, specifically as follows:

TABLE 1

It should be noted that, in the embodiment of the present disclosure, the temperature, the charge value, and the corresponding open-circuit voltage in the state of charge matrix are merely examples, and are not limited herein. In addition, the step interval of the charge values and the selected temperature difference are not specifically limited, and may be determined according to actual needs, for example, if a more accurate nuclear power state matrix is required, the specific sampling temperature, the number of the sampled charge values, and the step interval of the charge state matrix shown in the table in this step may extract a greater number and a smaller step difference according to needs, where the step difference in this step may be understood as a difference between values of two steps between the temperature or the charge value.

Therefore, the state of charge matrix is established through the corresponding relation among the charge value, the open-circuit voltage and the temperature, the influence of the temperature on the open-circuit voltage and the charge value in the battery is considered, the accuracy of the established state of charge matrix can be ensured, and the accuracy of the detection result of the battery capacity detection based on the state of charge matrix can be improved.

203. A first open circuit voltage and a first temperature of the battery are obtained.

In the step, when the capacity of the battery needs to be detected, the open-circuit voltage of the current battery and the surface temperature of the battery are obtained according to the method in the step, and are respectively recorded as the first open-circuit voltage and the first temperature. Specifically, in the process of acquiring the first open-circuit voltage and the first temperature of the battery, the acquisition may be performed according to a battery management system dedicated to detecting the battery. Of course, other methods may be selected for obtaining, which are not limited in particular, and may be selected from the detection apparatuses in the prior art according to actual needs.

204. And determining the charge value of the battery through a charge state matrix according to the first open-circuit voltage and the first temperature, and recording the charge value as a first charge value.

In the embodiment of the present disclosure, the battery capacity detection method is performed based on the state of charge matrix, and therefore, after the first temperature and the first open-circuit voltage of the battery are obtained in the step 203, the state of charge values corresponding to the first temperature and the first open-circuit voltage may be queried through the state of charge matrix established in the step 202, and the queried values are recorded as the first charge value, so as to determine the actual charge value of the current battery before discharging.

In the step, the first charge value of the battery is determined in the state of charge matrix through the acquired first open-circuit voltage and the acquired first temperature, so that the function of determining the charge value of the current battery before discharging can be realized, and the charge value is determined through the open-circuit voltage and the temperature, and the influence of the temperature on the open-circuit voltage and the charge value of the battery is considered, so that the problem of low accuracy of determining the charge value due to the fact that the temperature is not considered is solved, data guarantee is provided for the subsequent battery capacity detection process, and the accuracy of battery capacity detection is guaranteed as a whole.

205. And controlling a production line charging and discharging test device to charge or discharge the battery at a preset charging or discharging rate.

The charging or discharging rate in this step is a ratio of a charging current or a discharging current to a rated current of the battery for representing the charging or discharging of the battery.

After the charge value of the battery before discharging, i.e. the first charge value, is determined in the foregoing step 204, the battery may be subjected to a discharging operation, specifically, the charging and discharging equipment on the production line of the battery may be controlled to perform the discharging operation on the battery. Since the battery has a discharge rate problem during the discharge process, before the discharge operation in this step, a discharge rate may be preset, and the battery may be subjected to the discharge operation at the preset discharge rate. Generally, when a battery is discharged, the discharge rate of the battery can be one time discharge rate, that is, the rated current of the battery is one time speed, of course, other different rates can be selected according to actual needs to determine the discharge rate, or the discharge operation can be performed without setting the discharge rate under the condition that the discharge accuracy does not need to be controlled, and here, the mode of the discharge process and the discharge rate can be selected according to actual needs.

In addition, in this step, the variable electric quantity consumed in the discharging process of the battery, that is, the consumed electric quantity of the battery, may also be obtained in the discharging process of the battery. Specifically, the consumed electric quantity of the battery in the discharging process can be obtained through integral calculation by using the discharging current of the battery in the discharging process, and the discharging process in this step may further include: acquiring the discharge current of the battery in the charging or discharging process of the battery; and performing integral calculation on the discharge current to obtain the change electric quantity of the battery. The mode of obtaining the discharge current can be obtained by collecting the current flowing through the charging and discharging equipment of the production line, and can also be collected by other detection equipment.

Further, in order to standardize the checking time of the battery capacity detection method according to the embodiment of the disclosure, during the discharging process, the battery may be discharged to a preset voltage value, i.e. a target voltage, for example, to a voltage of 2.8V, so as to ensure that the time of the discharging process can be better controlled during the battery capacity detection. Therefore, when the battery is discharged in this step, the following steps may be specifically performed: and controlling a production line charging and discharging test device, and discharging the battery at a preset discharging rate until the voltage of the battery reaches a target voltage. In addition, in the method of the present disclosure, when the charging or discharging operation is performed on the battery at the preset charging or discharging rate by controlling the production line charging and discharging test device, the charging or discharging operation may be performed on the battery manually by the production line charging and discharging device, or the charging or discharging operation may be performed on the battery automatically by setting a device carrying a control command and transmitting the control command to the production line charging and discharging device through a port by using the preset control command. The operation mode of the discharging or charging process may be selected according to actual conditions, and is not limited specifically herein.

Therefore, by carrying out the discharging operation on the battery at the preset discharging rate, the discharging speed can be effectively controlled, and the time consumption in the battery detection process is further improved as a whole. Meanwhile, the battery is discharged to the target voltage, the discharging process can be further controlled, the discharging time is standardized and controllable, and the controllability of time consumption in the battery detection process is improved. In addition, the current value in the battery discharging process is obtained, and the integration operation is carried out on the current value to obtain the variation electric quantity in the battery discharging process, so that the electric quantity consumed by the battery in the discharging process can be accurately obtained, and a data base is laid for the subsequent detection of the battery capacity.

206. Controlling a battery-standing device so as to stand the battery for a preset time after the battery is charged or discharged.

According to the principle and the construction process of the battery, in the process of discharging and charging the battery, the conversion between chemical energy and electric energy is actually carried out, and because the problem of heat energy generation exists in the conversion process, the battery can generate heat after discharging, and the charge value and the open-circuit voltage of the battery also change in a floating manner under the condition of different temperatures, so that in order to ensure the accuracy of a subsequent detection result, after the discharging operation is carried out on the battery, the battery can be controlled to be placed by the standing equipment, and the subsequent operation is carried out after the open-circuit voltage is stable. The preset time for standing in this step may be uniformly set as required, or may be specifically set according to the nominal capacity and discharge time of each different battery, generally, the preset time for standing of the battery may be set to 30 minutes, where the preset time is not specifically limited and may be selected according to actual needs, and meanwhile, the standing device of the battery according to the embodiments of the present disclosure may be selected according to the prior art, specifically may be a battery management device, and may also be other devices that may be used for standing the battery, and the specific selection may be performed based on actual needs, and is not specifically limited herein, but the standing device of the selected battery may be controlled according to the method in this step.

It should be noted that, in the method for detecting battery capacity according to the embodiment of the present disclosure, the standing process in this step may be selected according to actual needs, and when it is determined that the temperature change of the battery is small or substantially unchanged after the battery is subjected to the discharging process, the step 207 may be directly executed without performing the standing operation in this step after the step 205 is executed.

207. And acquiring a second open-circuit voltage and a second temperature of the battery after the battery is charged or discharged.

In the embodiment of the present disclosure, the second open-circuit voltage, the second temperature, and the obtaining manner are all consistent with the description in the foregoing step 103, and are not described herein again. However, it should be noted that, in the battery capacity detection method according to the embodiment of the present disclosure, after the operation of standing the battery in step 206 is performed, the step may specifically be: and after the battery is kept still for a preset time, acquiring a second open-circuit voltage and a second temperature of the battery after the battery is kept still.

208. And determining the charge value of the charged or discharged battery according to the second open-circuit voltage and the second temperature through the charge state matrix, and recording the charge value as a second charge value.

After the second open-circuit voltage and the second temperature of the battery are obtained in step 207, the charge values corresponding to the second open-circuit voltage and the second temperature, that is, the charge values after the battery is discharged, may be determined from the state of charge matrix established in step 202 and may be referred to as the second charge values.

Specifically, in this step, the manner of obtaining the second open-circuit voltage and the second temperature may be obtained through a battery relation system, where the manner of obtaining the open-circuit voltage and the temperature of the battery may be obtained according to the battery management system in the embodiment of the present disclosure, and of course, in an actual operation process, a corresponding obtaining operation may be performed by controlling other collecting devices in the prior art according to an actual situation.

Therefore, in the step, the accuracy of the second charge value of the battery after discharging can be ensured by determining the charge value of the battery after discharging through the second open-circuit voltage, the second temperature and the charge state matrix, and the accuracy of the battery capacity detection result can be improved as a whole.

209. And determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery.

Since the variation capacity of the battery during the discharging process is obtained by the integration calculation of the current in the foregoing step 205, the total capacity of the battery can be determined in this step according to the two charge values of the battery before and after the discharging process and the variation capacity during the discharging process. The charge value is used as a parameter index of the battery capacity ratio, so that the capacity ratio consumed by the battery in the discharging process can be determined through the charge values twice, and the total capacity of the battery can be calculated according to the changed electric quantity of the battery and the consumed capacity ratio.

Thus, a specific process of calculating the total capacity of the battery in this step may be: firstly, performing difference calculation on the first charge value and the second charge value to obtain a charge difference value, wherein the charge difference value is the capacity proportion consumed by the battery in the step; then, a quotient calculation is performed on the changed electric quantity and the charge difference value, and then an actual total electric quantity of the battery, that is, a total capacity of the battery is obtained, wherein in the embodiment of the disclosure, since the executed battery capacity detection method is implemented based on a discharging process, the changed electric quantity in this step is actually an electric quantity consumed by the battery in the discharging process. Therefore, the total electric quantity of the battery is determined by quotient calculation through the capacity consumption proportion corresponding to the state of charge in the discharging process of the battery and the changed electric quantity, the actual total capacity of the battery is determined, the time consumption when the battery needs to be fully charged and discharged in the capacity detection process can be avoided, and the capacity detection efficiency of the battery is improved.

210. And when the total capacity of the battery is greater than or equal to the preset rated capacity, determining that the battery is qualified.

After the total capacity of the battery is calculated in step 209, since the total capacity of the battery is the actual capacity of the battery, and the battery is used as an energy supply device, the influence of problems such as cold joint, material polarity change and the like may occur in an actual production process, and the capacity of the battery is further influenced. Therefore, after determining the total capacity of the battery, it is necessary to determine whether the actual capacity of the device reaches a preset rated capacity, and thus to determine whether the battery is qualified. Therefore, after the aforementioned step 209, the total capacity of the battery needs to be compared with the rated capacity.

When the total capacity of the battery is determined to be greater than or equal to the rated capacity, the actual capacity of the battery can be determined to meet the capacity target at the beginning of the design of the battery, so that the battery can be determined to meet the standard of the rated capacity, and the battery is determined to be a qualified battery

In addition, when the total capacity of the battery is determined to be smaller than the rated capacity, it indicates that the actual capacity of the battery does not reach the predetermined standard in design, that is, the actual capacity does not reach the rated capacity, so that the battery can be determined to be out of the standard, and the battery can be determined to be unqualified.

In addition, in this step, when it is determined that the battery is defective, in order to ensure the accuracy of the monitoring result, secondary detection may be performed on the defective battery to exclude the influence of some external factors, for example, the influence of abnormal temperature in the detection area during detection.

In addition, in the actual production of the battery, since the battery as an electronic device is affected by processes, materials, and the like, the produced battery cannot guarantee that all battery capacities are the same value, and there may be fluctuation in a certain range between the capacities of a plurality of batteries, so the rated capacity in the embodiment of the disclosure includes, but is not limited to, a certain value, and may also be a range value near the certain value, that is, a rated capacity interval. Thus, in the method described in this step, it is also possible to determine whether or not the battery is acceptable based on the rated capacity interval value of the battery.

It should be noted that, since the battery capacity detection method according to the embodiment of the present disclosure is performed by two ways, namely, a discharge operation and a charge operation. Therefore, the detection process for realizing the battery capacity based on the charging process can be selected. When the detection process is implemented based on the charging process, the changed electric quantity described in the embodiment of the present disclosure is actually the increased electric quantity after the battery is charged, and the acquisition of the related parameters such as the second temperature, the second open-circuit voltage, the second charge value and the like acquired in the foregoing step is performed based on the charged temperature after the battery is charged and the charged open-circuit voltage, and the specific other execution processes are consistent with the steps in step 201 and step 209 described in the embodiment of the present disclosure, and the corresponding charge values are determined based on the open-circuit voltage before and after the charging, and the actual capacity of the battery is determined according to the change of the charge values and the relationship between the increased electric quantity of the battery after the charging.

Therefore, by judging the total capacity and the rated capacity of the battery and determining whether the battery is qualified according to the judgment result, the detection function of whether the battery is qualified can be realized, so that the detection function of qualified products can be realized on the basis of determining the battery capacity by the battery capacity detection method disclosed by the embodiment of the disclosure, and the detection function of the battery capacity detection method disclosed by the embodiment of the disclosure is further perfected.

Further, as an implementation of the method shown in fig. 1, an embodiment of the present disclosure further provides a battery capacity detection apparatus, which is used for implementing the method shown in fig. 1. The embodiment of the apparatus corresponds to the embodiment of the method, and for convenience of reading, details in the embodiment of the apparatus are not repeated one by one, but it should be clear that the apparatus in the embodiment can correspondingly implement all the contents in the embodiment of the method. As shown in fig. 3, the apparatus includes: a first acquiring unit 31, a first determining unit 32, a second acquiring unit 33, a second determining unit 34 and a third determining unit 35, wherein

The first obtaining unit 31 may be configured to obtain a first open circuit voltage and a first temperature of the battery.

The first determining unit 32 may be configured to determine, according to the first open-circuit voltage and the first temperature obtained by the first obtaining unit 31, a charge value of the battery through a charge state matrix, where the charge value is recorded as a first charge value, the charge value is a capacity parameter for measuring a charge state of the battery, and the charge state matrix is a matrix representing a correspondence relationship among a temperature, an open-circuit voltage, and a charge value of the battery.

The second obtaining unit 33 may be configured to obtain a second open-circuit voltage and a second temperature of the battery after the battery is charged or discharged.

The second determining unit 34 may be configured to determine the charge value of the charged or discharged battery according to the second open-circuit voltage and the second temperature acquired by the second acquiring unit 33 through the state of charge matrix, and record the charge value as the second charge value.

The third determining unit 35 may be configured to determine the total capacity of the battery according to the first charge value obtained by the first determining unit 32, the second charge value determined by the second determining unit 34, and the changed electric quantity of the battery, where the changed electric quantity of the battery is an electric quantity changed during the discharging process or the charging process of the battery.

Further, as an implementation of the method shown in fig. 2, an embodiment of the present disclosure further provides a battery capacity detection apparatus, which is used for implementing the method shown in fig. 2. The embodiment of the apparatus corresponds to the embodiment of the method, and for convenience of reading, details in the embodiment of the apparatus are not repeated one by one, but it should be clear that the apparatus in the embodiment can correspondingly implement all the contents in the embodiment of the method. As shown in fig. 4, the apparatus includes: a first acquisition unit 401, a first determination unit 402, a second acquisition unit 403, a second determination unit 404 and a third determination unit 405, wherein

The first obtaining unit 401 may be configured to obtain a first open circuit voltage and a first temperature of the battery.

The first determining unit 402 may be configured to determine, according to the first open-circuit voltage and the first temperature obtained by the first obtaining unit 401, a charge value of the battery through a charge state matrix, where the charge value is recorded as a first charge value, the charge value is a capacity parameter for measuring a charge state of the battery, and the charge state matrix is a matrix representing a correspondence relationship among a temperature, an open-circuit voltage, and a charge value of the battery.

The second obtaining unit 403 may be configured to obtain a second open-circuit voltage and a second temperature of the battery after the battery is charged or discharged.

The second determining unit 404 may be configured to determine the charge value of the charged or discharged battery according to the second open-circuit voltage and the second temperature acquired by the second acquiring unit 403, and record the charge value as a second charge value.

The third determining unit 405 may be configured to determine the total capacity of the battery according to the first charge value obtained by the first determining unit 402, the second charge value determined by the second determining unit 404, and the changed electric quantity of the battery, where the changed electric quantity of the battery is an electric quantity changed during the discharging process or the charging process of the battery.

Further, the apparatus further comprises:

a third obtaining unit 406, configured to obtain open-circuit voltages corresponding to different charge values of the sample battery at different temperatures;

the establishing unit 407 is configured to establish a state of charge matrix according to a corresponding relationship between the charge value, the open-circuit voltage, and the temperature acquired by the third acquiring unit 406, so that the first determining unit 402 and the second determining unit 404 determine corresponding charge values, where the state of charge matrix includes open-circuit voltages and corresponding charge values thereof at different temperatures.

Further, the third obtaining unit 406 includes:

the obtaining module 4061 may be configured to obtain, through the battery management system, the open-circuit voltage and the corresponding charge value of the sample battery at different preset temperatures each time.

Further, the third determining unit 405 includes:

the first calculating module 4051 may be configured to perform difference calculation on the first charge value and the second charge value to obtain a charge difference value;

the second calculating module 4052 may be configured to perform quotient calculation on the changed electric quantity and the charge difference calculated by the first calculating module 4051 to obtain a total capacity of the battery.

Further, the apparatus further comprises:

the fourth obtaining unit 408 may be configured to obtain a changed electric quantity of the battery during the charging or discharging process of the battery.

Further, the fourth obtaining unit 408 includes:

an obtaining module 4081, configured to obtain a charging or discharging current of the battery during a charging or discharging process of the battery;

the calculating module 4082 may be configured to perform an integral calculation on the charging or discharging current acquired by the acquiring module 4081 to obtain a changed electric quantity of the battery.

Further, the apparatus further comprises:

the second obtaining unit 403 may be specifically configured to obtain a second open-circuit voltage and a second temperature of the battery after the battery is kept still for a preset time.

By means of the technical scheme, the embodiment of the disclosure provides a battery capacity detection method and device. The method and the device have the advantages that time consumption is large when the battery capacity is detected in the prior art, and detection efficiency is affected. Compared with the prior art, the first charge value of the battery is determined in the state of charge matrix through the first open-circuit voltage and the first temperature, the second charge value of the battery is determined in the state of charge matrix through the second open-circuit voltage and the second temperature, and the influence of the temperature on the charge value of the battery is considered, so that the accuracy of the first charge value and the second charge value is improved, data guarantee is further provided for subsequent calculation of the total capacity of the battery, and the accuracy of a battery capacity detection result is integrally improved. Meanwhile, the total capacity of the battery is calculated through the first charge value, the second charge value and the change electric quantity of the battery, the charging process in the full-charge-discharge type battery capacity detection process is avoided, the time consumption in the discharging or charging process is reduced, the time required by the battery capacity detection process can be reduced on the whole, and the battery capacity detection efficiency is improved.

Meanwhile, in the present disclosure, the state of charge matrix is established through the corresponding relationship among the charge value, the open-circuit voltage and the temperature, and the influence of the temperature on the open-circuit voltage and the charge value in the battery is considered, so that the accuracy of the established state of charge matrix can be ensured, and the accuracy of the detection result of the battery capacity detection based on the state of charge matrix can be further improved. And, the first charge value of the battery is determined in the state of charge matrix through the acquired first open-circuit voltage and first temperature, so that the function of determining the charge value of the current battery before charging or discharging can be realized, furthermore, the charge value is determined by the open-circuit voltage and the temperature, and the influence of the temperature on the open-circuit voltage and the charge value of the battery is considered, thereby avoiding the problem of lower accuracy of determining the charge value caused by not considering the temperature, and determining the charge value of the battery after charging or discharging through the second open-circuit voltage, the second temperature and the charge state matrix, ensuring the accuracy of the second charge value of the battery after charging or discharging, therefore, the accuracy of the battery capacity detection result can be improved on the whole, data guarantee can be provided for the subsequent battery capacity detection process, and the accuracy of the battery capacity detection result on the whole is ensured.

In addition, by performing charging or discharging operation on the battery at a preset charging or discharging rate, the charging or discharging speed can be effectively controlled, and the time consumption in the battery detection process is further improved as a whole. Meanwhile, the battery is charged or discharged to the target voltage, the charging or discharging process can be further controlled, the charging or discharging time is standardized and controllable, and the controllability of time consumption in the battery detection process is improved. In addition, the current value in the battery charging or discharging process is obtained, and the integral operation is carried out on the current value to obtain the changing electric quantity in the battery charging or discharging process, so that the changing electric quantity of the battery in the charging or discharging process or the increasing electric quantity of the battery in the charging process can be accurately obtained, and a data base is laid for the subsequent detection of the battery capacity. In addition, after the battery is charged or discharged, the battery standing equipment is controlled so as to allow the battery to stand for the preset time, so that the problem of unstable open-circuit voltage caused by self heating of the battery during charging or discharging can be avoided, the accuracy of the subsequent second charge value and second temperature acquisition result can be improved, and the battery capacity detection result is more accurate.

Furthermore, in the method of the present disclosure, the total electric quantity of the battery is determined by quoting the electric quantity through the capacity consumption ratio corresponding to the state of charge in the battery charging or discharging process and the changed electric quantity, and the actual total capacity of the battery is determined accordingly, so that the time consumption when the battery needs to be fully charged and discharged in the battery capacity detection process can be avoided, and the detection efficiency of the battery capacity is improved. Moreover, by judging the total capacity and the rated capacity of the battery and determining whether the battery is qualified according to the judgment result, the detection function of whether the battery is qualified can be realized, so that the detection function of qualified products can be realized on the basis of determining the battery capacity by the battery capacity detection method disclosed by the embodiment of the disclosure, and the detection function of the battery capacity detection method disclosed by the embodiment of the disclosure is further perfected.

The battery capacity detection device comprises a processor and a memory, wherein the first acquisition unit, the first determination unit, the second acquisition unit, the second determination unit, the third determination unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more than one, time consumption in the battery capacity detection process is reduced by adjusting kernel parameters, and detection efficiency is improved.

The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.

An embodiment of the present disclosure provides a storage medium having a program stored thereon, the program implementing the battery capacity detection method when executed by a processor.

An embodiment of the present disclosure provides a processor for executing a program, where the program executes the battery capacity detection method.

An embodiment of the present disclosure provides an apparatus, which includes a processor, a memory, and a program stored on the memory and executable on the processor, and when the processor executes the program, the following steps are implemented: acquiring a first open-circuit voltage and a first temperature of a battery; determining the charge value of the battery according to the first open-circuit voltage and the first temperature through a charge state matrix, and recording the charge value as a first charge value, wherein the charge value is a capacity parameter for measuring the charge state of the battery, and the charge state matrix is a matrix representing the corresponding relation among the temperature, the open-circuit voltage and the charge value of the battery; acquiring a second open-circuit voltage and a second temperature of the battery after the battery is charged or discharged; determining the charge value of the charged or discharged battery according to the second open-circuit voltage and the second temperature through the charge state matrix, and recording the charge value as a second charge value; and determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery, wherein the changed electric quantity of the battery is the electric quantity changed in the discharging process or the charging process of the battery.

Further, before the obtaining the first open circuit voltage and the first temperature of the battery, the method further includes:

Further, the obtaining of the open-circuit voltages corresponding to different charge values of the sample battery at different temperatures includes:

Further, after determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery, the method further comprises:

and when the total capacity of the battery is greater than or equal to the preset rated capacity, determining that the battery is qualified. Further, the determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery includes:

Further, before the determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery, the method further comprises:

Further, the acquiring the changed electric quantity of the battery in the charging or discharging process of the battery includes:

Further, the controlling the production line charging and discharging test device to perform charging or discharging operation on the battery at a preset charging or discharging rate includes:

Further, before the obtaining the second open-circuit voltage and the second temperature of the battery, the method further includes:

Embodiments of the present disclosure also provide a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device: acquiring a first open-circuit voltage and a first temperature of a battery; determining the charge value of the battery according to the first open-circuit voltage and the first temperature through a charge state matrix, and recording the charge value as a first charge value, wherein the charge value is a capacity parameter for measuring the charge state of the battery, and the charge state matrix is a matrix representing the corresponding relation among the temperature, the open-circuit voltage and the charge value of the battery; acquiring a second open-circuit voltage and a second temperature of the battery after the battery is charged or discharged; determining the charge value of the charged or discharged battery according to the second open-circuit voltage and the second temperature through the charge state matrix, and recording the charge value as a second charge value; and determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery, wherein the changed electric quantity of the battery is the electric quantity changed in the discharging process or the charging process of the battery.

and when the total capacity of the battery is greater than or equal to the preset rated capacity, determining that the battery is qualified.

Further, the determining the total capacity of the battery according to the first charge value, the second charge value and the changed electric quantity of the battery includes:

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A battery capacity detection method is characterized by comprising the following steps:

acquiring a first open-circuit voltage and a first temperature of a battery;

2. The method of claim 1, wherein prior to said obtaining the first open circuit voltage and the first temperature of the battery, the method further comprises:

3. The method of claim 2, wherein obtaining open circuit voltages corresponding to different charge values of the sample cell at different temperatures comprises:

4. The method of claim 1, wherein after said determining the total capacity of the battery from the first charge value, the second charge value, and the varying charge of the battery, the method further comprises:

5. The method of claim 1, wherein determining the total capacity of the battery based on the first charge value, the second charge value, and the varying charge of the battery comprises:

6. The method of claim 1, wherein prior to said determining the total capacity of the battery from the first charge value, the second charge value, and the varying charge of the battery, the method further comprises:

7. The method of claim 6, wherein the obtaining the changed charge of the battery during the charging or discharging of the battery comprises:

8. The method of claim 1, wherein prior to said obtaining a second open circuit voltage and a second temperature of said battery, said method further comprises:

and controlling production line charging and discharging test equipment, and carrying out charging or discharging operation on the battery at a preset charging or discharging rate, wherein the charging or discharging rate is used for representing the ratio of charging or discharging current in the charging or discharging process of the battery to rated current of the battery.

9. The method of claim 8, wherein the controlling in-line charging and discharging test equipment to perform charging or discharging operations on the battery at a preset charging or discharging rate comprises:

10. The method of any of claims 1-9, wherein prior to said obtaining a second open circuit voltage and a second temperature of said battery, said method further comprises:

11. A battery capacity detection device, comprising:

12. The apparatus of claim 11, further comprising:

13. The apparatus of claim 12, wherein the third obtaining unit comprises:

14. The apparatus according to claim 11, wherein the third determining unit comprises:

15. The apparatus of claim 11, further comprising:

16. The apparatus of claim 15, wherein the fourth obtaining unit comprises:

17. The apparatus according to any one of claims 11-16, further comprising:

18. A storage medium comprising a stored program, wherein the apparatus in which the storage medium is located is controlled to execute the battery capacity detection method according to any one of claims 1 to 10 when the program is executed.

19. An electronic device, characterized in that the electronic device comprises:

one or more processors;

a memory for storing one or more programs;

when executed by the one or more processors, cause the one or more processors to implement the battery capacity detection method of any one of claims 1 to 10.