Method and apparatus for correcting state of charge of battery, vehicle and storage medium

Abstract

A method and apparatus for correcting the state of charge of a battery, a vehicle and a storage medium. The method for correcting the state of charge of a battery comprises: acquiring the discharge voltage of a first battery cell, the discharge current of the first battery cell and the state of charge of the first battery cell, the first battery cell being a battery cell in a battery pack having the smallest voltage value (S101); if the discharge voltage of the first battery cell is less than a discharge cut-off voltage and the discharge current of the first battery cell is less than a preset current, on the basis of the discharge voltage and a polarization voltage of the first battery cell, determining the open-circuit voltage of the first battery cell (S102); and, if the open-circuit voltage of the first battery cell is less than a preset open-circuit voltage, correcting the state of charge of the first battery cell to zero, the preset open-circuit voltage being the corresponding open-circuit voltage when the state of charge of the battery cell in the battery pack is zero (S103). The present application may solve the problem that states of charge displayed by batteries are higher, such that the batteries discharging to the end is prone to cause battery undervoltage faults and thus affects service lives of the batteries.

Description

Battery remaining capacity correction method and device, vehicle, and storage medium TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicles, and particularly relates to a battery remaining capacity correction method and device, a vehicle, and a storage medium. BACKGROUND

[0002] If the battery of a vehicle is kept at a high SOC (State Of Charge, remaining capacity) for a long time without correction, the remaining capacity displayed by the battery can be too high, and the battery can easily cause an under-voltage fault at the end of discharge, affecting the service life of the battery. SUMMARY

[0003] The embodiments of the present application provide a battery remaining capacity correction method and device, a vehicle, and a storage medium, which can solve the problem of the remaining capacity displayed by the battery being too high, the battery easily causing an under-voltage fault at the end of discharge, and affecting the service life of the battery.

[0004] In a first aspect, the embodiments of the present application provide a battery remaining capacity correction method, which includes the following steps.

[0005] Obtaining a discharge voltage of a first single battery, a discharge current of the first single battery, and a remaining capacity of the first single battery; the first single battery is a single battery with the smallest voltage value in a battery pack;

[0006] If the discharge voltage of the first single battery is less than a discharge cutoff voltage and the discharge current of the first single battery is less than a preset current, determining an open-circuit voltage of the first single battery according to the discharge voltage and a polarization voltage of the first single battery; the polarization voltage is the difference between the open-circuit voltage and the discharge voltage of the single battery;

[0007] If the open-circuit voltage of the first single battery is less than a preset open-circuit voltage, correcting the remaining capacity of the first single battery to zero; the preset open-circuit voltage is the open-circuit voltage corresponding to the remaining capacity of zero of the single battery in the battery pack.

[0008] In a possible implementation manner of the first aspect, the determining of the open-circuit voltage of the first single battery according to the discharge voltage and the polarization voltage of the first single battery includes the following steps.

[0009] Calculating the sum of the discharge voltage and the polarization voltage of the first single battery to obtain the open-circuit voltage of the first single battery.

[0010] In a possible implementation manner of the first aspect, the battery remaining capacity correction method further includes the following steps.

[0011] Obtaining a current temperature of the first single battery;

[0012] determining the discharge cut-off voltage according to the current temperature.

[0013] In a possible implementation manner of the first aspect, if the open circuit voltage of the first single battery is less than the preset open circuit voltage, the remaining power of the first single battery is corrected to zero, including:

[0014] If the duration that the open circuit voltage of the first single battery is less than the preset open circuit voltage is greater than the first preset time, the remaining power of the first single battery is corrected to zero.

[0015] In a possible implementation manner of the first aspect, the battery remaining power correction method further includes:

[0016] controlling the single battery to discharge when the remaining power of the single battery is less than the preset power, and obtaining a first voltage of the single battery at the end of the discharging;

[0017] controlling the single battery to enter a resting state, and obtaining a second voltage of the single battery when the duration that the single battery is in the resting state reaches the second preset time;

[0018] calculating the difference between the second voltage and the first voltage to obtain the polarization voltage.

[0019] In a possible implementation manner of the first aspect, the battery remaining power correction method further includes:

[0020] obtaining the remaining power of a second single battery; the second single battery is a single battery with the maximum remaining power in the battery pack;

[0021] correcting the remaining power of the second single battery based on the remaining power correction value of the first single battery to obtain the remaining power of the second single battery after correction; the remaining power correction value of the first single battery is the difference between the remaining power of the first single battery before correction and the remaining power of the first single battery after correction;

[0022] determining the remaining power of the battery pack based on the remaining power of the first single battery after correction and the remaining power of the second single battery after correction.

[0023] In a possible implementation manner of the first aspect, the correcting the remaining power of the second single battery based on the remaining power correction value of the first single battery includes:

[0024] subtracting the remaining power correction value of the first single battery from the remaining power of the second single battery to obtain the remaining power of the second single battery after correction.

[0025] In a second aspect, the embodiments of the present application provide a battery remaining capacity correction device, comprising:

[0026] A first obtaining module is configured to obtain a discharge voltage of a first single battery, a discharge current of the first single battery, and a remaining capacity of the first single battery; the first single battery is a single battery with the smallest voltage value in a battery pack;

[0027] A open-circuit voltage determining module is configured to determine an open-circuit voltage of the first single battery according to the discharge voltage of the first single battery and a polarization voltage if the discharge voltage of the first single battery is less than a discharge cutoff voltage and the discharge current of the first single battery is less than a preset current; the polarization voltage is a difference between the open-circuit voltage and the discharge voltage of the single battery;

[0028] A first correction module is configured to correct the remaining capacity of the first single battery to zero if the open-circuit voltage of the first single battery is less than a preset open-circuit voltage; the preset open-circuit voltage is an open-circuit voltage corresponding to the remaining capacity of zero of the single battery in the battery pack.

[0029] In a third aspect, the embodiments of the present application provide a vehicle, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method of any one of the first aspect when executing the computer program.

[0030] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the method of any one of the first aspect.

[0031] In a fifth aspect, the embodiments of the present application provide a computer program product, which, when executed on a vehicle, causes the vehicle to perform the method of any one of the first aspect.

[0032] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0033] When the vehicle's battery is in operation, the discharge voltage, discharge current, and remaining charge of the first individual battery cell are acquired. The first individual battery cell is the one with the lowest voltage in the battery pack. If the discharge voltage of the first individual battery cell is less than the discharge cutoff voltage and the discharge current is less than a preset current, it indicates that the current discharge voltage of the first individual battery cell is too low and the current discharge current is relatively small. In this case, the open-circuit voltage of the first individual battery cell is determined based on its discharge voltage and polarization voltage (the difference between the open-circuit voltage and the discharge voltage of the individual battery cell). If the open-circuit voltage of the first individual battery cell is less than the preset open-circuit voltage (the open-circuit voltage corresponding to the zero remaining charge of the individual batteries in the battery pack), it indicates that the remaining charge of the first individual battery cell should be zero. If the remaining charge of the first individual battery cell is not zero, it is corrected to zero. When the vehicle detects that the remaining charge of the first individual battery cell is zero, it prohibits the first individual battery cell from continuing to discharge to prevent over-discharge and undervoltage faults, thus extending the battery's lifespan.

[0034] It is understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 is a schematic flowchart of a battery remaining power correction method provided in an embodiment of this application;

[0037] Figure 2 is a schematic flowchart of a battery remaining power correction method provided in another embodiment of this application;

[0038] Figure 3 is a flowchart illustrating a battery remaining power correction method provided in another embodiment of this application;

[0039] Figure 4 is a schematic diagram of the battery remaining power correction device provided in an embodiment of this application;

[0040] Figure 5 is a structural schematic diagram of the vehicle provided in an embodiment of this application. Embodiments of the present invention

[0041] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and

[0042] It will be understood that the term "includes," "including," "has," "having," "comprises," "comprising," "contains" or "containing," when used in this specification and in the following claims, specifies the presence of the stated features, integers, steps, operations, elements, and / or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0043] It will also be understood that the term "and / or," when used in this specification and in the following claims, can connote any conjunctive or disjunctive sense, in any combination, and can include any of the possible combinations of the items linked by the term.

[0044] As used in this specification and in the claims, the term "if" can be interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be interpreted to mean "upon determining" or "in response to determining" or "upon detecting [the described condition or event]" or "in response to detecting [the described condition or event]," depending on the context.

[0045] In addition, the terms "first," "second," "third," etc. are used herein only to describe different instances of elements, and are not intended to imply relative importance or significance.

[0046] The terms "one embodiment," "some embodiments," "an embodiment," "some embodiments," etc. as may be used herein, mean "one or more of the embodiments described herein," "one or more of the embodiments described herein with respect to one or more particular features, structures, or characteristics described herein," and / or "one or more specific embodiments described herein," but not necessarily all embodiments nor necessarily all particular features, structures, or characteristics described herein. Thus, the appearances of the phrase "in one embodiment" or "in some embodiments" in various places throughout this specification are not necessarily referring to the same embodiment(s), nor necessarily referring to the same particular feature, structure, or characteristic of an embodiment(s). Furthermore, the terms "first," "second," "third," etc. are used herein only to describe different instances of elements, and are not necessarily used to imply relative importance or significance.

[0047] If the battery of the vehicle remains at a high SOC (State Of Charge) for a long time without correction, as the accumulated error of ampere-hour integration increases, the remaining capacity displayed by the battery may be too high, and the battery may easily cause an under-voltage failure at the end of discharge, affecting the service life of the battery. For example, the actual remaining capacity of the battery is 0%, but the displayed remaining capacity is 5%, at which time the vehicle still controls the battery to discharge, causing the battery to have an under-voltage failure, affecting the service life of the battery.

[0048] Based on the above problems, the battery remaining capacity correction method is provided. Referring to FIG. 1, the battery remaining capacity correction method includes steps S101 to S103.

[0049] In step S101, the discharge voltage of the first single battery, the discharge current of the first single battery, and the remaining capacity of the first single battery are obtained. The first single battery is the single battery with the smallest voltage value in the battery pack.

[0050] Specifically, when the battery of the vehicle is in a working state, i.e., the battery of the vehicle is in a discharging state, the voltage values of each single battery in the battery pack are obtained, and then the single battery with the smallest voltage value is selected as the first single battery. After the first single battery is determined, the discharge current of the first single battery and the remaining capacity of the first single battery are obtained.

[0051] In step S102, if the discharge voltage of the first single battery is less than the discharge cutoff voltage and the discharge current of the first single battery is less than the preset current, the open-circuit voltage of the first single battery is determined according to the discharge voltage and the polarization voltage of the first single battery.

[0052] Specifically, the discharge cutoff voltage is the minimum voltage allowed for the battery to discharge, i.e., when the voltage of the battery is greater than the discharge cutoff voltage, the battery is allowed to discharge; if the voltage of the battery is less than the discharge cutoff voltage, the battery discharge may cause an over-discharge leading to an under-voltage failure.

[0053] If the discharge voltage of the first single battery is less than the discharge cutoff voltage and the discharge current of the first single battery is less than the preset current, it indicates that the voltage of the first single battery is too low and the current is small, and if the first single battery continues to discharge at this time, there is a risk of over-discharge leading to an under-voltage failure. At this time, the open-circuit voltage of the first single battery is determined according to the discharge voltage and the polarization voltage of the first single battery. The polarization voltage is the difference between the open-circuit voltage and the discharge voltage of the single battery.

[0054] The discharge cutoff voltage of the battery is affected by the battery, i.e., the discharge cutoff voltage is different at different temperatures of the battery. The designer can pre-set the temperature-discharge cutoff voltage correspondence of the single battery according to the parameters of the battery, and store the temperature-discharge cutoff voltage correspondence of the single battery to the database.

[0055] In the determination of the discharge cutoff voltage, the current temperature of the first single battery is first acquired, and then the discharge cutoff voltage is determined according to the current temperature.

[0056] Specifically, the current temperature of the first single battery is acquired by a sensor on the vehicle, or the temperature of the region where the first single battery is located is acquired by the sensor and taken as the current temperature of the first single battery. After the current temperature of the first single battery is determined, the discharge cutoff voltage can be determined according to the current temperature and the stored temperature-discharge cutoff voltage corresponding relationship. Thus, the corresponding discharge cutoff voltage is determined for the temperature of the first single battery, which improves the accuracy of the determination of the discharge cutoff voltage, and further improves the accuracy of the judgment of whether the first single battery has the over-discharge leading to the undervoltage fault.

[0057] In some embodiments, the open-circuit voltage of the first single battery comprises: calculating the sum of the discharge voltage and the polarization voltage of the first single battery to obtain the open-circuit voltage of the first single battery.

[0058] Specifically, the polarization voltage is the difference between the open-circuit voltage of the single battery and the discharge voltage of the single battery. The current open-circuit voltage of the first single battery can be obtained by adding the polarization voltage to the discharge voltage of the first single battery.

[0059] In some embodiments, as shown in FIG. 2, the determination method of the polarization voltage comprises steps S201 to S203.

[0060] Step S201, when the remaining power of the single battery is lower than the preset power, the single battery is controlled to discharge, and the first voltage of the single battery is acquired at the end time of the discharge.

[0061] Specifically, in the case of low power, the polarization of the battery will be more obvious. Therefore, when the polarization voltage is determined in the case of low remaining power of the battery, i.e., when the polarization voltage of the single battery is determined when the remaining power of the single battery is lower than the preset power.

[0062] When the remaining power of the single battery is lower than the preset power, the single battery is controlled to discharge, so that the single battery is polarized, and the voltage of the single battery is acquired at the end time of the discharge, i.e., the first voltage is obtained.

[0063] It should be noted that the designer can set the preset power according to the actual situation, for example, the preset power can be set to 15%, 20%, 25% or other values.

[0064] Step S202, the single battery is controlled to enter a stationary state, and a second voltage of the single battery is acquired when the duration of the single battery in the stationary state reaches a second preset time.

[0065] Specifically, the control unit controls the single battery to enter a static state, and the static state is that the single battery is neither charged nor discharged. The voltage of the single battery will gradually increase after the single battery stops discharging. After the single battery is static for a sufficient time, the voltage of the single battery reaches a stable state, and the voltage of the single battery at this time is the open circuit voltage. Therefore, when the duration of the single battery in the static state reaches a second preset time, the voltage of the single battery is obtained, that is, the second voltage is obtained.

[0066] It should be noted that the second preset time can be set by the designer according to the actual situation, for example, the second preset time can be set to 1 hour, 1.5 hours, 2 hours or other time.

[0067] In step S203, the difference between the second voltage and the first voltage is calculated to obtain the polarization voltage.

[0068] Specifically, after the first voltage and the second voltage are determined, the difference between the second voltage and the first voltage is calculated to obtain the polarization voltage corresponding to the single battery.

[0069] It should be noted that the preset current can be set by the designer according to the actual situation, for example, the preset current can be set to 8A, 9A, 10A or other values.

[0070] In step S103, if the open circuit voltage of the first single battery is less than a preset open circuit voltage, the remaining capacity of the first single battery is corrected to zero, and the preset open circuit voltage is the open circuit voltage corresponding to the remaining capacity of the single battery in the battery pack being zero.

[0071] Specifically, the preset open circuit voltage is the open circuit voltage corresponding to the remaining capacity of the single battery in the battery pack being zero. The designer can determine the preset open circuit voltage according to the parameter information of the battery, and store the preset open circuit voltage to the database. After the open circuit voltage of the first single battery is determined, the open circuit voltage of the first single battery is compared with the preset open circuit voltage. If the open circuit voltage of the first single battery is less than the preset open circuit voltage, it indicates that the remaining capacity of the first single battery should be zero. At this time, if the remaining capacity of the first single battery is not zero, the remaining capacity of the first single battery is corrected to zero. When the vehicle identifies that the remaining capacity of the first single battery is zero, the first single battery is prohibited to continue discharging, so as to prevent the first single battery from over-discharging and causing an under-voltage fault, and prolong the service life of the battery.

[0072] When calculating the open circuit voltage of the first single battery, there may be errors in the collected discharging voltage of the first single battery or other factors affecting the calculation of the open circuit voltage of the first single battery, which may further cause the remaining capacity of the first single battery to be corrected incorrectly.

[0073] Based on the above problems, in the present application, when determining whether the remaining capacity of the first single battery needs to be corrected, it is necessary to judge whether the duration of the open circuit voltage of the first single battery being less than the preset open circuit voltage reaches the preset time. If the duration of the open circuit voltage of the first single battery being less than the preset open circuit voltage is greater than the first preset time, the open circuit voltage of the first single battery will be calculated multiple times within the first preset time, and the open circuit voltage of the first single battery calculated each time is compared with the preset open circuit voltage. If the open circuit voltage of the first single battery obtained each time is less than the preset open circuit voltage, it indicates that the calculation of the open circuit voltage of the first single battery has no error, and the remaining capacity of the first single battery reaches the correction adjustment. At this time, the remaining capacity of the first single battery is corrected to zero, thereby improving the accuracy of the correction of the remaining capacity of the first single battery.

[0074] In some embodiments, as shown in FIG. 3, the battery remaining capacity correction method further includes steps S301 to S303.

[0075] Step S301, obtaining the remaining capacity of a second single battery; the second single battery is the single battery with the largest remaining capacity in the battery pack.

[0076] Specifically, when the battery of the vehicle is in a working state, i.e., the battery of the vehicle is in a discharging state, the remaining capacity of each single battery in the battery pack is obtained, and then the single battery with the largest remaining capacity is selected as the second single battery.

[0077] Step S302, correcting the remaining capacity of the second single battery based on the remaining capacity correction value of the first single battery, to obtain the corrected remaining capacity of the second single battery; the remaining capacity correction value of the first single battery is the difference between the remaining capacity of the first single battery before correction and the remaining capacity of the first single battery after correction.

[0078] Specifically, after the correction of the remaining capacity of the first single is completed, the remaining capacity correction value of the first single battery is obtained by subtracting the remaining capacity of the first single battery after correction from the remaining capacity of the first single battery before correction. Then, the corrected remaining capacity of the second single battery is obtained by subtracting the remaining capacity correction value of the first single battery from the remaining capacity of the second single battery. In this way, the correction of the remaining capacity of the second single battery is completed. This part of the correction of the remaining capacity of the second single battery ensures that the correction value of the remaining capacity of the second single battery is the same as the correction value of the remaining capacity of the first single battery.

[0079] Step S303, determining the remaining capacity of the battery pack based on the corrected remaining capacity of the first single battery and the corrected remaining capacity of the second single battery.

[0080] Specifically, when the remaining capacity of the first single battery and the remaining capacity of the second single battery are both corrected, that is, when the single battery with the largest remaining capacity and the single battery with the smallest remaining capacity in the battery pack are both corrected, the corrected remaining capacity of the first single battery and the corrected remaining capacity of the second single battery are weighted and calculated to obtain the remaining capacity of the battery pack, and the correction of the remaining capacity of the battery pack is completed, thereby improving the accuracy of the remaining capacity of the battery pack, preventing the battery pack from being over-discharged to cause an under-voltage fault, and prolonging the service life of the battery pack.

[0081] In order to clearly illustrate the working principle of the battery remaining capacity correction method of the present application, a specific example is described below.

[0082] When the remaining capacity of the single battery is less than 25%, the single battery is controlled to be discharged at 1C for 10 seconds, and the first voltage of the single battery is obtained at the end of the discharging. Then the single battery is controlled to enter a resting state, and the second voltage of the single battery is obtained when the duration of the single battery in the resting state reaches 1 hour. Finally, the difference between the second voltage and the first voltage is calculated to obtain the polarization voltage.

[0083] When the vehicle is in a working state, that is, when the battery of the vehicle is in a discharging state, the discharging voltage, the discharging voltage and the remaining capacity of each single battery of the battery pack are obtained. Then it is determined that the single battery with the smallest voltage value in the battery is the first single battery, and the single battery with the largest remaining capacity is the second single battery.

[0084] If the discharging voltage of the first single battery is less than the discharging cutoff voltage and the discharging current of the first single battery is less than 10A, the sum of the discharging voltage and the polarization voltage of the first single battery is calculated to obtain the open-circuit voltage of the first single battery. If the open-circuit voltage of the first single battery is less than the preset open-circuit voltage, the remaining capacity of the first single battery is corrected to zero; the preset open-circuit voltage is the open-circuit voltage corresponding to the zero remaining capacity of the single battery in the battery pack. When the vehicle identifies that the remaining capacity of the first single battery is zero, the first single battery is prohibited from continuing to discharge, thereby preventing the first single battery from over-discharging to cause an under-voltage fault and prolonging the service life of the battery.

[0085] When the remaining capacity of the first single battery is corrected, the remaining capacity of the first single battery before correction is subtracted from the remaining capacity of the first single battery after correction to obtain the remaining capacity correction value of the first single battery. Then the remaining capacity of the second single battery is subtracted from the remaining capacity correction value of the first single battery to obtain the corrected remaining capacity of the second single battery. In this way, the correction of the remaining capacity of the second single battery is completed. This part of the correction of the remaining capacity of the second single battery ensures that the correction value of the remaining capacity of the second single battery is the same as the correction value of the remaining capacity of the first single battery.

[0086] When the remaining power of the first single battery and the remaining power of the second single battery are both corrected, that is, when the single battery with the largest remaining power and the single battery with the smallest remaining power in the battery pack are both corrected, the remaining power of the battery pack is obtained by performing a weighted calculation on the corrected remaining power of the first single battery and the corrected remaining power of the second single battery, the correction of the remaining power of the battery pack is completed, the accuracy of the remaining power of the battery pack is improved, over-discharge of the battery pack is prevented, and the service life of the battery pack is prolonged.

[0087] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0088] FIG. 4 shows a structural schematic diagram of a battery remaining power correction device provided by an embodiment of the present application. Referring to FIG. 4, the battery remaining power correction device includes:

[0089] The first acquisition module 41 is configured to acquire the discharge voltage of a first single battery, the discharge current of the first single battery, and the remaining power of the first single battery; the first single battery is a single battery with the smallest voltage value in a battery pack;

[0090] The open-circuit voltage determination module 42 is configured to, if the discharge voltage of the first single battery is less than a discharge cutoff voltage and the discharge current of the first single battery is less than a preset current, determine the open-circuit voltage of the first single battery according to the discharge voltage of the first single battery and a polarization voltage; the polarization voltage is the difference between the open-circuit voltage and the discharge voltage of the single battery.

[0091] The first correction module 43 is configured to, if the open-circuit voltage of the first single battery is less than a preset open-circuit voltage, correct the remaining power of the first single battery to zero; the preset open-circuit voltage is the open-circuit voltage corresponding to the case that the remaining power of the single battery in the battery pack is zero.

[0092] In some embodiments, the open-circuit voltage determination module 42 is further configured to:

[0093] Calculate the sum of the discharge voltage of the first single battery and the polarization voltage to obtain the open-circuit voltage of the first single battery.

[0094] In some embodiments, the battery remaining power correction device further includes:

[0095] The second acquisition module is configured to acquire the current temperature of the first single battery.

[0096] The discharge cutoff voltage determination module is configured to determine the discharge cutoff voltage according to the current temperature.

[0097] In some embodiments, the first correction module is further configured to:

[0098] If the duration in which the open-circuit voltage of the first single battery is less than the preset open-circuit voltage is greater than the first preset time, the remaining power of the first single battery is corrected to zero.

[0099] In some embodiments, the battery remaining power correction device further comprises:

[0100] a first voltage determination module configured to control the single battery to discharge when the remaining power of the single battery is lower than a preset power, and obtain a first voltage of the single battery at the end of the discharging;

[0101] a second voltage determination module configured to control the single battery to enter a resting state, and obtain a second voltage of the single battery when the duration in which the single battery is in the resting state reaches a second preset time;

[0102] a polarization voltage determination module configured to calculate the difference between the second voltage and the first voltage to obtain the polarization voltage.

[0103] In some embodiments, the battery remaining power correction device further comprises:

[0104] a third obtaining module configured to obtain the remaining power of a second single battery; the second single battery is the single battery with the largest remaining power in the battery pack;

[0105] a second correction module configured to correct the remaining power of the second single battery based on the remaining power correction value of the first single battery to obtain the corrected remaining power of the second single battery; the remaining power correction value of the first single battery is the difference between the remaining power of the first single battery before correction and the remaining power of the first single battery after correction;

[0106] a third correction module configured to determine the remaining power of the battery pack based on the corrected remaining power of the first single battery and the corrected remaining power of the second single battery.

[0107] In some embodiments, the second correction module is further configured to:

[0108] subtract the remaining power correction value of the first single battery from the remaining power of the second single battery to obtain the corrected remaining power of the second single battery.

[0109] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or software. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application. The specific working process of the unit and module in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0110] Fig. 5 is a structural schematic diagram of a vehicle provided by an embodiment of the present application. As shown in Fig. 5, the vehicle 5 of this embodiment can include at least one processor 50 (only one processor 50 is shown in Fig. 5), a memory 51, and a computer program 52 stored in the memory 51 and executable on the at least one processor 50, wherein the processor 50 implements the steps in any of the above method embodiments, such as steps S101 to S103 in the embodiment shown in Fig. 1, when executing the computer program 52. Alternatively, the processor 50 implements the functions of each module / unit in the above device embodiments, such as the functions of the modules 41 to 43 shown in Fig. 4, when executing the computer program 52.

[0111] For example, the computer program 52 can be divided into one or more modules / units, which are stored in the memory 51 and executed by the processor 50 to complete the present application. The one or more modules / units can be a series of computer program 52 instruction segments that can complete a specific function, which are used to describe the execution process of the computer program 52 in the vehicle 5.

[0112] The embodiment of the present application also provides a computer readable storage medium, which stores a computer program 52, wherein the computer program 52 is executed by a processor 50 to implement the steps in the above method embodiments.

[0113] The embodiment of the present application provides a computer program product, which, when executed on a vehicle, enables the vehicle to implement the steps in the above method embodiments.

[0114] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the computer program 52 can be used to instruct the related hardware to complete all or part of the processes in the above-mentioned embodiments. The computer program 52 can be stored in a computer readable storage medium, and the computer program 52 can implement the steps of each method embodiment described above when executed by the processor 50. The computer program 52 includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium at least includes any entity or device capable of carrying the computer program code to the terminal, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunications signal and a software distribution medium. For example, a U disk, a mobile hard disk, a magnetic disk or an optical disk, etc. In some jurisdictions, according to legislation and patent practice, the computer readable medium can not be an electrical carrier signal and a telecommunications signal.

[0115] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0116] Those skilled in the art can appreciate that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0117] In the embodiments provided in the present application, it should be understood that the disclosed apparatus / network device and method can be implemented in other ways. For example, the apparatus / network device embodiments described above are only schematic. The division of the modules or units is only a logical function division, and there can be another division in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0118] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may also be distributed to multiple network units. Part or all of the units can be selected to achieve the purpose of the embodiment scheme according to actual needs.

[0119] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A battery remaining capacity correction method characterized by, The method comprises the following steps: acquiring the discharge voltage of a first single battery, the discharge current of the first single battery, and the residual capacity of the first single battery; the first single battery is the single battery with the minimum voltage value in a battery pack; if the discharge voltage of the first single battery is less than the discharge cutoff voltage and the discharge current of the first single battery is less than a preset current, determining the open circuit voltage of the first single battery according to the discharge voltage and the polarization voltage of the first single battery; the polarization voltage is the difference between the open circuit voltage and the discharge voltage of the single battery; if the open circuit voltage of the first single battery is less than a preset open circuit voltage, correcting the residual capacity of the first single battery to zero; the preset open circuit voltage is the open circuit voltage corresponding to the residual capacity of zero of the single battery in the battery pack.

2. The battery remaining capacity correction method according to claim 1, characterized by, The method comprises the following steps: calculating the sum of the discharge voltage of the first single battery and the polarization voltage to obtain the open circuit voltage of the first single battery.

3. The battery remaining capacity correction method according to claim 1, characterized by, The method further comprises the following steps: acquiring the current temperature of the first single battery; determining the discharge cutoff voltage according to the current temperature.

4. The battery remaining capacity correction method according to claim 1, characterized by, The method further comprises the following steps: if the duration that the open circuit voltage of the first single battery is less than the preset open circuit voltage is greater than a first preset time, correcting the residual capacity of the first single battery to zero.

5. The battery remaining capacity correction method according to claim 1, characterized by, The method further comprises the following steps: when the residual capacity of the single battery is lower than a preset capacity, controlling the single battery to discharge and acquiring the first voltage of the single battery at the end of the discharging; controlling the single battery to enter a resting state and acquiring the second voltage of the single battery when the duration that the single battery is in the resting state reaches a second preset time; calculating the difference between the second voltage and the first voltage to obtain the polarization voltage.

6. The battery remaining capacity correction method according to any one of claims 1 to 5, characterized by, The method further comprises the following steps: acquiring the residual capacity of a second single battery; the second single battery is the single battery with the maximum residual capacity in the battery pack; correcting the residual capacity of the second single battery based on the residual capacity correction value of the first single battery to obtain the corrected residual capacity of the second single battery; the residual capacity correction value of the first single battery is the difference between the residual capacity of the first single battery before correction and the residual capacity of the first single battery after correction; determining the residual capacity of the battery pack based on the corrected residual capacity of the first single battery and the corrected residual capacity of the second single battery.

7. The battery remaining capacity correction method according to claim 6, characterized by, The method further comprises the following steps: subtracting the residual capacity correction value of the first single battery from the residual capacity of the second single battery to obtain the corrected residual capacity of the second single battery.

8. The battery remaining capacity correction method according to claim 6, characterized by, The remaining capacity of the battery pack is determined based on the corrected remaining capacity of the first single battery and the corrected remaining capacity of the second single battery, including: The remaining capacity of the battery pack is obtained by weighting the corrected remaining capacity of the first single battery and the corrected remaining capacity of the second single battery.

9. A battery remaining capacity correction device characterized by comprising: Including: The first acquisition module is configured to acquire the discharge voltage of the first single battery, the discharge current of the first single battery, and the remaining capacity of the first single battery; The first single battery is the single battery with the minimum voltage value in the battery pack; The open-circuit voltage determination module is configured to determine the open-circuit voltage of the first single battery according to the discharge voltage of the first single battery and the polarization voltage if the discharge voltage of the first single battery is less than the discharge cutoff voltage and the discharge current of the first single battery is less than the preset current; the polarization voltage is the difference between the open-circuit voltage and the discharge voltage of the single battery; The first correction module is configured to correct the remaining capacity of the first single battery to zero if the open-circuit voltage of the first single battery is less than the preset open-circuit voltage; the preset open-circuit voltage is the open-circuit voltage corresponding to the remaining capacity of zero of the single battery in the battery pack.

10. A vehicle comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the method of any one of claims 1-8.

11. A computer-readable storage medium storing a computer program, wherein the computer program comprises the following steps of: receiving a request for a resource from a client; determining whether the client is authorized to access the resource; and if the client is authorized to access the resource, providing the resource to the client. The computer program is executed by the processor to implement the method of any one of claims 1-8.

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