Charging management method and device, equipment and storage medium

Abstract

The embodiment of the invention provides a charging management method and device, equipment and a storage medium, and relates to the technical field of new energy vehicles. The charging operation is executed based on the current capable of being borne by the power battery in the current charging state, and the risk that the service life of the battery is shortened due to overlarge charging current of the battery system is reduced. The method comprises the following steps: acquiring a battery capacity coefficient of the power battery in a current charging scene; obtaining a charging current value supported by the power battery in the current charging scene based on the battery capacity coefficient; and executing charging operation on the power battery according to the charging current value.

Description

[Technical field]

[0001] The embodiments of the present application relate to the field of new energy vehicle technology, and in particular, to a charging management method, device, equipment and storage medium. [Background technology]

[0002] With the rapid development of new energy vehicles, pure electric vehicles have experienced explosive growth. The battery health of new energy vehicles is directly related to their endurance. In order to improve the performance of new energy vehicles, various battery health management strategies have been proposed in the new energy vehicle field, such as the battery health rapid assessment management system and the battery self-service repair system.

[0003] In addition to the above-mentioned evaluation and management of power batteries, more attention should be paid to the loss of the battery itself during the use of the power battery. For example, the power battery supplies energy during vehicle driving and the power battery stores electrical energy during charging, which will cause loss of battery performance. In view of this, this application aims to improve the charging process with respect to the problem of loss of the battery itself during the battery charging process. [Summary of the invention]

[0004] The embodiments of the present application provide a charging management method, apparatus, device and storage medium, which perform charging operations based on the current that the power battery can withstand in the current charging state, thereby reducing the risk of reduced battery service life due to excessive charging current in the battery system.

[0005] In a first aspect, an embodiment of the present application provides a charging management method, which is applied to a battery management system, and the method includes: obtaining a battery capacity coefficient of the power battery in a current charging scenario; obtaining a charging current value supported by the power battery in the current charging scenario based on the battery capacity coefficient; and performing a charging operation on the power battery according to the charging current value.

[0006] The charging management method proposed in the embodiment of the present application obtains a battery capacity coefficient representing the available capacity of the power battery in the current charging scenario, so as to take into account the objective loss caused by multiple uses of the battery. Based on the rated current required for charging the power battery based on the current charging device, the available capacity of the power battery in the current charging scenario is analyzed, and the rated current and the battery capacity are comprehensively calculated to obtain the charging current for charging the battery, so that the charging current not only meets the requirements of the charging device and the rated current, but also can meet the current that the battery can support after attenuation, thereby reducing the risk of reduced battery service life due to excessive charging current in the battery system.

[0007] In one possible implementation manner, obtaining a charging current value supported by the power battery in the current secondary charging scenario based on the battery capacity coefficient includes:

[0008] Obtaining a current allowable charging current value of the power battery based on a power supply environment state of a charging device; the current allowable charging current value represents a rated current that is not affected by charging characteristics of the power battery;

[0009] The charging current value is calculated according to the current allowable charging current value and the battery capacity coefficient of the power battery.

[0010] In one possible implementation, obtaining the battery capacity coefficient of the power battery in the current secondary charging scenario includes:

[0011] Reading the available charge factor of the power battery and the change in charging capacity during the historical charging process;

[0012] The battery capacity coefficient of the power battery is calculated according to the available charge coefficient and the charging capacity change; the battery capacity parameter is the ratio of the actual available capacity of the power battery to the rated capacity.

[0013] In one possible implementation, calculating the charging current value according to the current allowable charging current value and the battery capacity coefficient of the power battery includes:

[0014] Calculating the product of the current allowed charging current value and the battery capacity coefficient to obtain the charging current value;

[0015] Performing a charging operation on the power battery according to the charging current value includes:

[0016] Sending the charging current value to the charging device corresponding to the current charging scenario;

[0017] When it is detected that the current returned by the charging device meets the agreed charging current value, the power battery is charged with the current returned by the charging device.

[0018] In one possible implementation, the power battery includes a plurality of single cells, and obtaining a current allowable charging current value of the power battery based on a power supply environment state of a charging device includes:

[0019] Reading a safe current value of each single cell among the plurality of single cells based on a power supply environment state of a charging device;

[0020] The minimum value among the corresponding safe current values ​​of the multiple single batteries is selected as the current allowable charging current value.

[0021] In one possible implementation, obtaining a current allowable charging current value of a power battery based on a power supply environment of a charging device includes:

[0022] Reading the voltage extreme value and temperature extreme value of the power battery; the voltage extreme value includes the maximum voltage value or the minimum voltage value; the temperature extreme value includes the maximum temperature value and the minimum temperature value;

[0023] The current value that matches the voltage extreme value and the temperature extreme value simultaneously is searched in a preset relationship table as the current allowable charging current value; the preset relationship table is the sum of the mapping relationship between different voltages and currents and the mapping relationship between different temperatures and currents.

[0024] In a second aspect, an embodiment of the present application provides a charging management device, which is provided in a battery management system, and the device includes:

[0025] A capacity acquisition module, used to acquire the battery capacity coefficient of the power battery in the current secondary charging scenario;

[0026] A current acquisition module, used to obtain a charging current value supported by the power battery in the current secondary charging scenario based on the battery capacity coefficient;

[0027] A charging module is used to perform a charging operation on the power battery according to the charging current value.

[0028] In one possible implementation, the current acquisition module includes:

[0029] A current acquisition submodule, used to obtain a current allowable charging current value of the power battery based on the power supply environment state of the charging device; the current allowable charging current value represents a rated current that is not affected by the charging characteristics of the power battery;

[0030] The first calculation submodule is used to calculate the charging current value according to the current allowable charging current value and the battery capacity coefficient of the power battery.

[0031] In one possible implementation, the capacity acquisition module includes:

[0032] A reading submodule, used to read the available charge factor of the power battery and the change in charging capacity during the historical charging process;

[0033] The second calculation submodule is used to calculate the battery capacity coefficient of the power battery according to the available charge coefficient and the charging capacity change; the battery capacity parameter is the ratio of the actual available capacity of the power battery to the rated capacity.

[0034] In one possible implementation, the first computing submodule includes:

[0035] a calculation subunit, configured to calculate the product of the current allowable charging current value and the battery capacity coefficient to obtain the charging current value;

[0036] The charging module comprises:

[0037] A current value sending submodule, used to send the charging current value to a charging device corresponding to the current charging scenario;

[0038] The charging submodule is used to charge the power battery with the current returned by the charging device when detecting that the current returned by the charging device meets the agreed charging current value.

[0039] In one possible implementation, the power battery includes multiple single cells, and the current acquisition submodule is specifically used to read the safe current value of each single cell among the multiple single cells based on the power supply environment state of the charging device; and select the minimum value of the corresponding safe current values ​​among the multiple single cells as the currently allowed charging current value.

[0040] In one possible implementation, the current acquisition submodule includes:

[0041] A reading subunit, used to read the voltage extreme value and temperature extreme value of the power battery; the voltage extreme value includes the maximum voltage value or the minimum voltage value; the temperature extreme value includes the maximum temperature value and the minimum temperature value;

[0042] The search subunit is used to search for the current value that matches the voltage extreme value and the temperature extreme value at the same time in a preset relationship table as the current allowed charging current value; the preset relationship table is the sum of the mapping relationship between different voltages and currents and the mapping relationship between different temperatures and currents.

[0043] In a third aspect, an embodiment of the present application provides a device comprising: at least one processor; and at least one memory communicatively connected to the processor, wherein: the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the method provided in the first aspect.

[0044] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions enable the computer to execute the method provided in the first aspect.

[0045] It should be understood that the second to fourth aspects of the embodiments of the present application are consistent with the technical solutions of the first aspect of the embodiments of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here.

Brief Description of the Drawings

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 is a flowchart of the charging management method steps proposed in the embodiment of the present application;

[0048] Figure 2 is a flowchart of another charging management method proposed in an embodiment of the present application;

[0049] Figure 3 is a logic flow chart of an exemplary charging management method of the present application;

[0050] Figure 4 It is a functional module diagram of the charging management device proposed in the embodiment of the present application;

[0051] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. [Specific implementation method]

[0052] In order to better understand the technical solution of this specification, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0053] It should be clear that the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.

[0054] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit this specification. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0055] Figure 1This is a flowchart of the charging management method steps proposed in the embodiment of the present application, which is applied to the battery management system (BMS). One end of the BMS is connected to the battery, and the other end is connected to the control and electronic system of the vehicle. The BMS communicates with the vehicle master controller, motor controller, energy control system, vehicle display system, etc. in real time through the CAN bus interface. The BMS can monitor the voltage, current, and temperature of the power battery in real time through sensors, and can also perform leakage monitoring, thermal management, battery balancing management, and calculation of the remaining state of charge (SOC) of the power battery. Figure 1 As shown, the charging management method includes:

[0056] Step S11: obtaining the battery capacity coefficient of the power battery in the current secondary charging scenario.

[0057] The purpose of acquiring the current charging scenario is to acquire the number of charge and discharge times of the power battery, the charging device currently connected for charging, and the objective parameters of the power battery in the current charging scenario, such as temperature, voltage, etc.

[0058] When the charging current exceeds the current that the power battery can support, the following effects will occur: the lithium ions released from the positive electrode of the battery cell will not be able to quickly complete the lithium insertion in the negative electrode, and the un-embedded lithium ions will be precipitated on the surface of the negative electrode, referred to as lithium precipitation. This effect is greater when charging at low temperatures; the charging temperature changes will become larger, the voltage change of the battery cell will become higher, and the rapid change in the terminal voltage of charging will lead to insufficient charging. This will aggravate the side reactions in the long term. The charging current that the power battery can support is related to the battery parameters in the current charging scenario and the battery capacity.

[0059] In the case of multiple uses, the power battery system will inevitably have capacity decay. Therefore, in different charging scenarios, the battery capacity of the power battery is different, and the current that the power battery can support is also different. Obtaining the charging current according to the same logic each time you charge will cause the current power battery capacity to be insufficient to support the charging current, accelerating the loss of the battery; in view of this, this application takes into account the objective decay of the battery, and each time you charge, calculate the current that should be used for the current charge according to the remaining battery capacity after the power battery decays to the current time, thereby reducing the loss of the power battery system.

[0060] The battery capacity coefficient is a system that represents the charge capacity state of a power battery at the current time after prolonged use.

[0061] Step S12: obtaining a charging current value supported by the power battery in the current secondary charging scenario based on the battery capacity coefficient.

[0062] Step S13: Execute charging operation on the power battery according to the charging current value.

[0063] The power battery is replenished with a charging current that does not exceed the charging current value to avoid excessive charging current causing the power battery voltage and temperature to change too quickly, and to ensure that lithium ions are completely embedded in the negative electrode.

[0064] An embodiment of the present application provides an execution method to obtain a charging current value of a power battery based on a battery capacity coefficient. Before obtaining the charging current value, the rated current of the power battery without considering decay is calculated based on battery characteristics related to the charging scenario. On the basis of the rated current, the battery decay factors are comprehensively considered to calculate the charging current value.

[0065] Step S12 includes sub-steps:

[0066] Step S121: obtaining a current allowable charging current value of the power battery based on a power supply environment state of a charging device; the current allowable charging current value represents a rated current that is not affected by charging characteristics of the power battery.

[0067] Not affected by the charging characteristics of the power battery means: not affected by the charge state of the power battery or battery decay.

[0068] For example, the current allowable charging current value may be calculated from the voltage of the charging system, the ambient temperature, the power of the charging device, etc. after the charging device is connected.

[0069] Therefore, the currently allowable charging current value can be the default current value that can be used in the corresponding environment of the current charging scenario assuming that the battery has not decayed. The rated current that is not affected by the charging characteristics of the power battery may be related to the following factors: ambient temperature, vehicle status, power supply parameters of the power supply equipment, etc.

[0070] An embodiment of the present application also provides a method for the current allowable charging current value, without considering the rated current of the power battery charging characteristics, including the steps of:

[0071] Step S21: reading the voltage extreme value and temperature extreme value of the power battery; the voltage extreme value includes the maximum voltage value or the minimum voltage value; the temperature extreme value includes the maximum temperature value and the minimum temperature value.

[0072] Step S22: searching a preset relationship table for a current value that matches both the voltage extreme value and the temperature extreme value as the current allowable charging current value; the preset relationship table is the sum of mapping relationships between different voltages and currents and mapping relationships between different temperatures and currents.

[0073] For example, the maximum temperature and the maximum voltage of the power battery can be read, and the current value 1 corresponding to both the maximum temperature and the maximum voltage can be obtained by searching in a preset relationship table; the minimum temperature and the minimum voltage of the power battery can be read, and the current value 2 corresponding to both the maximum temperature and the maximum voltage can be obtained by searching in a preset relationship table, and the lower of the current value 1 and the current value 2 is selected as the currently allowable charging current value.

[0074] Table 1 is an example of a preset relationship table of the present application, in which x represents the detected voltage of the power battery, Table 1:

[0075] Charging current / A ＜0 0℃ 5℃ 10℃ 15℃ 20℃ 25℃ 35℃ 1800<x≤2500mV 0 10 10 10 10 10 10 10 2500<x≤3520mV 0 10 40 56 75 110 115 115 3520<x≤3560mV 0 10 30 30 50 75 75 75 3560<x≤3590mV 0 10 16 16 30 45 45 45 3590<x≤3650mV 0 10 12 16 16 16 16 16

[0076] Step S122: Calculating the charging current value according to the current allowable charging current value and the battery capacity coefficient of the power battery.

[0077] The embodiment of the present application comprehensively analyzes two factors to calculate the charging current value; on the one hand, the rated current that the power battery can support in the current charging scenario, and on the other hand, the current that the remaining battery capacity of the power battery after decay over time can support in the current charging, to ensure that the charging current meets both the limitations of the charging equipment and the charging environment in the charging scenario and the limitations of the battery's own characteristics on the current.

[0078] The embodiment of the present application proposes another charging management method, which provides a specific implementation method of obtaining the battery capacity coefficient of the power battery in the current charging scenario, and also provides a specific implementation method of performing the charging operation on the power battery according to the charging current value. Figure 2 is another charging management method step flow chart proposed in the embodiment of the present application, such as Figure 2 As shown, the steps include:

[0079] Step S31: reading the available charge factor of the power battery and the change in charging capacity during the historical charging process.

[0080] The available charge factor may be the SOC.

[0081] Step S32: Calculating the battery capacity coefficient of the power battery according to the available charge coefficient and the charging capacity change; the battery capacity parameter SOH is the ratio of the actual available capacity of the power battery to the rated capacity.

[0082] By calculating the changes in charging capacity and SOC during the actual charging process, the battery capacity coefficient SOH of the current battery is calculated, and then calibration is performed. SOH itself is a relatively accurate parameter.

[0083] Step S33: obtaining the current allowable charging current value of the power battery based on the power supply environment state of the charging device.

[0084] Step S34: Calculate the product of the current allowed charging current value and the battery capacity coefficient to obtain the charging current value.

[0085] Step S35: sending the charging current value to the charging device corresponding to the current charging scenario;

[0086] Step S36: When it is detected that the current returned by the charging device meets the agreed charging current value, the power battery is charged with the current returned by the charging device.

[0087] For example, a charging device such as a charging pile can be connected to the BMS through a CAN line, so that the BMS can send the charging current value to the CAN network, and the charging device provides current to the power battery based on the received charging current value. The BMS can also detect the current returned by the charging pile to determine whether the current it withdraws meets the constraints of the charging current value. If the current returned by the charging pile is greater than the charging current value, the BMS can control the exit of the charging mode and request current again to avoid damage to the power battery.

[0088] Another embodiment of the present application also proposes that the power battery is composed of multiple battery cells. In order to ensure that the charging current does not cause additional loss to each cell, the embodiment of the present application can collect voltage extreme values ​​and temperature extreme values ​​for each cell, calculate the safe current of each cell, and select the minimum safe current as the current allowable charging current value.

[0089] The power battery includes a plurality of single cells, and obtaining a current allowable charging current value of the power battery based on a power supply environment state of a charging device includes:

[0090] Reading a safe current value of each single cell among the plurality of single cells based on a power supply environment state of a charging device;

[0091] The minimum value among the corresponding safe current values ​​of the multiple single batteries is selected as the current allowable charging current value.

[0092] Figure 3 This is a logic flow chart of an example of a charging management method of the present application. Figure 3 As shown, the process of BMS executing the charging management method includes:

[0093] K11: Power on the power battery system and check that the power battery system has no faults and is in charging mode;

[0094] K12: Read the lowest cell voltage and the highest cell voltage among multiple cells in the current power battery pack;

[0095] KI3: Read the lowest cell temperature and the highest cell temperature among multiple cells of the current power battery pack;

[0096] KI4: Query the preset relationship table to obtain the current allowable charging current value I corresponding to the minimum cell voltage and the minimum cell temperature p1 , query the preset relationship table to obtain the current allowable charging current value I corresponding to the maximum cell voltage and the maximum cell temperature p2 ; Select I p2 and I p1 The smaller value is used as the current allowable charging current value I p .

[0097] K15: Multiply the battery capacity factor SOH, which represents the health of the battery, by IP to obtain the charging current value I x , sent to the charging station.

[0098] Figure 4 is a functional module diagram of a charging management device proposed in an embodiment of the present application. The charging management device is arranged in a BMS, such as Figure 4 As shown, the device comprises:

[0099] The capacity acquisition module 41 is used to acquire the battery capacity coefficient of the power battery in the current secondary charging scenario;

[0100] A current acquisition module 42, configured to obtain a charging current value supported by the power battery in the current secondary charging scenario based on the battery capacity coefficient;

[0101] The charging module 43 is used to perform a charging operation on the power battery according to the charging current value.

[0102] Figure 4 The charging management device provided in the embodiment shown can be used to implement the present invention. Figures 1 to 3 The technical solution of the method embodiment shown, its implementation principle and technical effects can be further referred to the relevant description in the method embodiment.

[0103] Optionally, the current acquisition module includes:

[0104] A current acquisition submodule, used to obtain a current allowable charging current value of the power battery based on the power supply environment state of the charging device; the current allowable charging current value represents a rated current that is not affected by the charging characteristics of the power battery;

[0105] The first calculation submodule is used to calculate the charging current value according to the current allowable charging current value and the battery capacity coefficient of the power battery.

[0106] Optionally, the capacity acquisition module includes:

[0107] A reading submodule, used to read the available charge factor of the power battery and the change in charging capacity during the historical charging process;

[0108] The second calculation submodule is used to calculate the battery capacity coefficient of the power battery according to the available charge coefficient and the charging capacity change; the battery capacity parameter is the ratio of the actual available capacity of the power battery to the rated capacity.

[0109] Optionally, the first calculation submodule includes:

[0110] a calculation subunit, configured to calculate the product of the current allowable charging current value and the battery capacity coefficient to obtain the charging current value;

[0111] The charging module comprises:

[0112] A current value sending submodule, used to send the charging current value to a charging device corresponding to the current charging scenario;

[0113] The charging submodule is used to charge the power battery with the current returned by the charging device when detecting that the current returned by the charging device meets the agreed charging current value.

[0114] Optionally, the power battery includes multiple single cells, and the current acquisition submodule is specifically used to read the safe current value of each single cell in the multiple single cells based on the power supply environment state of the charging device; and select the minimum value of the corresponding safe current values ​​in the multiple single cells as the currently allowed charging current value.

[0115] Optionally, the current acquisition submodule includes:

[0116] A reading subunit, used to read the voltage extreme value and temperature extreme value of the power battery; the voltage extreme value includes the maximum voltage value or the minimum voltage value; the temperature extreme value includes the maximum temperature value and the minimum temperature value;

[0117] The search subunit is used to search for the current value that matches the voltage extreme value and the temperature extreme value at the same time in a preset relationship table as the current allowed charging current value; the preset relationship table is the sum of the mapping relationship between different voltages and currents and the mapping relationship between different temperatures and currents.

[0118] The device provided in the above-mentioned embodiment is used to execute the technical solution of the above-mentioned method embodiment. Its implementation principle and technical effect can be further referred to the relevant description in the method embodiment, which will not be repeated here.

[0119] The device provided in the above embodiment can be, for example, a chip or a chip module. The device provided in the above embodiment is used to execute the technical solution of the above method embodiment. Its implementation principle and technical effect can be further referred to the relevant description in the method embodiment, which will not be repeated here.

[0120] Regarding the various modules / units included in the various devices described in the above embodiments, they can be software modules / units, or hardware modules / units, or they can be partially software modules / units and partially hardware modules / units. For example, for various devices applied to or integrated in a chip, the various modules / units included therein can all be implemented in the form of hardware such as circuits, or at least some of the modules / units can be implemented in the form of software programs, which run on a processor integrated inside the chip, and the remaining modules / units can be implemented in the form of hardware such as circuits; for various devices applied to or integrated in a chip module, the various modules / units included therein can all be implemented in the form of hardware such as circuits, and different modules / units can be located in the same component of the chip module (such as a chip, circuit module, etc.) or in different components, or at least some of the modules / units can be implemented in the form of software programs. The software program may be implemented in the form of a program, which runs on a processor integrated in the chip module, and the remaining modules / units may be implemented in the form of hardware such as circuits; for each device applied to or integrated in the electronic terminal device, each module / unit contained therein may be implemented in the form of hardware such as circuits, and different modules / units may be located in the same component (for example, a chip, a circuit module, etc.) or in different components in the electronic terminal device, or at least some modules / units may be implemented in the form of a software program, which runs on a processor integrated in the electronic terminal device, and the remaining (if any) modules / units may be implemented in the form of hardware such as circuits.

[0121] Figure 5 A structural schematic diagram of an electronic device provided in an embodiment of the present application, the electronic device 500 can be arranged in a battery management system, or the electronic device 500 can be an integrated module of the battery management system, including a processor 510, a memory 511, and a computer program stored in the memory 511 and executable on the processor 510, the processor 510 implements the steps in the aforementioned method embodiment when executing the program, the electronic device provided in the embodiment can be used to execute the technical solution of the method embodiment shown above, and its implementation principle and technical effect can be further referred to the relevant description in the method embodiment, which will not be repeated here.

[0122] The present application provides a computer-readable storage medium storing computer instructions, which enables the computer to execute the instructions in this specification. Figure 1 to Figure 3The charging management method provided by the illustrated embodiment. The computer readable storage medium may refer to a non-volatile computer storage medium.

[0123] The above-mentioned computer-readable storage medium can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, - but not limited to - an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM) or flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0124] Computer-readable signal media may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0125] The program code embodied on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wire, optical cable, radio frequency (RF), etc., or any suitable combination of the foregoing.

[0126] Computer program code for performing the operations of the present specification may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0127] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0128] In the description of the embodiments of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this specification. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradicting each other.

[0129] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this specification, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0130] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of this specification includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of this specification belong.

[0131] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0132] It should be noted that the terminals involved in the embodiments of the present application may include but are not limited to personal computers (PCs), personal digital assistants (PDAs), wireless handheld devices, tablet computers, mobile phones, MP3 players, MP4 players, etc.

[0133] In the several embodiments provided in this specification, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0134] In addition, each functional unit in each embodiment of this specification may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0135] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform some steps of the method described in each embodiment of this specification. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes.

[0136] The above description is only a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this specification should be included in the scope of protection of this specification.

Claims

1. A charging management method, characterized in that: Applied to a battery management system, the method comprises: Obtain the battery capacity coefficient of the power battery in the current charging scenario; Obtaining a charging current value supported by the power battery in the current secondary charging scenario based on the battery capacity coefficient; The power battery is charged according to the charging current value.

2. The method according to claim 1, characterized in that Obtaining a charging current value supported by the power battery in the current secondary charging scenario based on the battery capacity coefficient includes: Obtaining a current allowable charging current value of the power battery based on a power supply environment state of a charging device; the current allowable charging current value represents a rated current that is not affected by charging characteristics of the power battery; The charging current value is calculated according to the current allowable charging current value and the battery capacity coefficient of the power battery.

3. The method according to claim 1, characterized in that Obtaining the battery capacity coefficient of the power battery in the current charging scenario includes: Reading the available charge factor of the power battery and the change in charging capacity during the historical charging process; The battery capacity coefficient of the power battery is calculated according to the available charge coefficient and the charging capacity change; the battery capacity parameter is the ratio of the actual available capacity of the power battery to the rated capacity.

4. The method according to claim 2, characterized in that: Calculating the charging current value according to the current allowable charging current value and the battery capacity coefficient of the power battery includes: Calculating the product of the current allowed charging current value and the battery capacity coefficient to obtain the charging current value; Performing a charging operation on the power battery according to the charging current value includes: Sending the charging current value to the charging device corresponding to the current charging scenario; When it is detected that the current returned by the charging device meets the agreed charging current value, the power battery is charged with the current returned by the charging device.

5. The method according to claim 2, characterized in that: Obtain the current allowable charging current value of the power battery based on the power supply environment of the charging equipment, including: Reading the voltage extreme value and temperature extreme value of the power battery; the voltage extreme value includes the maximum voltage value or the minimum voltage value; the temperature extreme value includes the maximum temperature value and the minimum temperature value; The current value that matches the voltage extreme value and the temperature extreme value simultaneously is searched in a preset relationship table as the current allowable charging current value; the preset relationship table is the sum of the mapping relationship between different voltages and currents and the mapping relationship between different temperatures and currents.

6. A charging management device, characterized in that: Set in a battery management system, the device includes: A capacity acquisition module is used to obtain the battery capacity coefficient of the power battery in the current charging scenario; A current acquisition module, used to obtain a charging current value supported by the power battery in the current secondary charging scenario based on the battery capacity coefficient; A charging module is used to perform a charging operation on the power battery according to the charging current value.

7. The device according to claim 6, characterized in that The current acquisition module comprises: A current acquisition submodule, used to obtain a current allowable charging current value of the power battery based on the power supply environment state of the charging device; the current allowable charging current value represents a rated current that is not affected by the charging characteristics of the power battery; The first calculation submodule is used to calculate the charging current value according to the current allowable charging current value and the battery capacity coefficient of the power battery.

8. The device according to claim 6, characterized in that The capacity acquisition module includes: A reading submodule, used to read the available charge factor of the power battery and the change in charging capacity during the historical charging process; The second calculation submodule is used to calculate the battery capacity coefficient of the power battery according to the available charge coefficient and the charging capacity change; the battery capacity parameter is the ratio of the actual available capacity of the power battery to the rated capacity.

9. An electronic device, comprising: at least one processor; as well as At least one memory in communication with the processor, characterized in that: The memory stores program instructions executable by the processor, and the processor can execute the method according to any one of claims 1 to 5 by calling the program instructions.

10. A computer-readable storage medium storing computer instructions, characterized in that: The computer instructions enable the computer to execute the method according to any one of claims 1 to 5.

Images