Charging control method and device, storage medium and battery management system

Abstract

The embodiment of the invention provides a charging control method and device, a storage medium and a battery management system. The method comprises the following steps: acquiring a charging current and a charging voltage in response to a charging permission instruction sent by a VCU; the current battery pack temperature is obtained, and if the current battery pack temperature is larger than or equal to a second set threshold value, the current display SOC is obtained, and the working condition of the current display SOC is determined; and performing charging control according to the charging current and the charging voltage based on the working condition of the currently displayed SOC. According to the technical scheme provided by the embodiment of the invention, charging control can be performed according to different working conditions of the currently displayed SOC, the battery does not need to be fully charged every time, the battery is not easy to age, and the service life of the battery and the service life of the whole vehicle are prolonged.

Description

[Technical field]

[0001] The present invention relates to the field of battery technology, and in particular to a charging control method, device, storage medium and battery management system. [Background technology]

[0002] The Battery Management System (BMS) is a control system that protects the safe use of power batteries. It can monitor the battery status at all times and provide protection for the safe use of new energy vehicles. It is widely used in pure electric vehicles. The charging link is the most involved link in electric vehicles. The quality of charging often determines the quality of an electric vehicle, so its charging control method becomes a key factor in charging.

[0003] There are two main ways to charge electric vehicles: one is fast charging using a public charging station, and the other is slow charging using a home charging device. Regardless of fast charging or slow charging, the user connects the charging gun to the new energy vehicle, and the new energy vehicle automatically fills the battery. If the battery is fully charged every time, it may cause overcharging problems, battery aging, and a lower battery life and vehicle life. [Summary of the invention]

[0004] In view of this, embodiments of the present invention provide a charging control method, device, storage medium and battery management system to improve the battery life and vehicle life.

[0005] In one aspect, an embodiment of the present invention provides a charging control method, including:

[0006] In response to a charging permission instruction sent by the VCU, obtaining a charging current and a charging voltage;

[0007] If the current battery pack temperature is greater than or equal to the set temperature threshold, the current displayed SOC is obtained and the working condition of the current displayed SOC is determined;

[0008] Based on the operating condition of the currently displayed SOC, charging control is performed according to the charging current and the charging voltage.

[0009] Optionally, the performing charging control based on the operating condition of the currently displayed SOC according to the charging current and the charging voltage includes:

[0010] If the highest cell voltage has triggered the charging set point before the currently displayed SOC reaches the first set threshold, charging is performed according to the charging current and the charging voltage to charge the currently displayed SOC to the set power threshold and continue to maintain charging; or,

[0011] If the highest cell voltage has triggered the full charge position before the currently displayed SOC reaches the first threshold, charging is stopped; or,

[0012] If the currently displayed SOC is falsely high or normal, charging is performed according to the charging current and the charging voltage, and the currently displayed SOC is charged to a set power threshold and charging is continued.

[0013] Optionally, after performing charging control based on the operating condition of the currently displayed SOC and the charging current and the charging voltage, the method further comprises:

[0014] Displaying the currently displayed SOC as a set power threshold, wherein the maximum clamping value of the currently displayed SOC is the set power threshold;

[0015] Setting the current real SOC to the smaller of the current real SOC and the set power threshold;

[0016] A charging end instruction is sent to the VCU, so that the VCU sets the vehicle mode to a non-charging mode according to the charging end instruction and stops charging.

[0017] Optionally, it also includes:

[0018] If the current battery pack temperature is lower than the set temperature threshold, the battery is heated, and the battery relay is closed for pre-charging, and a third charging instruction is sent to the VCU so that the VCU sets the vehicle mode to the second charging mode in response to the third charging instruction, and sends a charging permission instruction to the BMS, and continues to execute the steps of obtaining the charging current and the charging voltage in response to the charging permission instruction sent by the VCU.

[0019] Optionally, before heating the battery, the method includes:

[0020] When receiving the charging port connection signal sent by the VCU, the power threshold is set according to the charging mode information;

[0021] Obtaining the currently displayed SOC, and if the currently displayed SOC is greater than or equal to a set power threshold, not charging the battery; or,

[0022] If the currently displayed SOC is less than the set power threshold, a first charging instruction is sent to the VCU, so that the VCU sets the vehicle mode to the first charging mode in response to the first charging instruction, and sends a second charging instruction to the BMS;

[0023] In response to the second charging instruction, obtaining a current battery pack temperature, and determining whether the current battery pack temperature is less than a set temperature threshold;

[0024] If it is determined that the current battery pack temperature is lower than the set temperature threshold, the step of heating the battery is continued.

[0025] Optionally, it also includes:

[0026] If it is determined that the current battery pack temperature is greater than or equal to the set temperature threshold, continue to execute the step of performing charging control based on the operating condition of the currently displayed SOC and the charging current and the charging voltage.

[0027] Optionally, the charging mode information is received by the vehicle computer from the user and sent to the VCU, and the VCU sends the charging mode information to the BMS.

[0028] On the other hand, an embodiment of the present invention provides a charging control device, including:

[0029] A first acquisition module, configured to acquire a charging current and a charging voltage in response to a charging permission instruction sent by the VCU;

[0030] A second acquisition module, configured to acquire the currently displayed SOC and determine the working condition of the currently displayed SOC if the currently acquired battery pack temperature is greater than or equal to a set temperature threshold;

[0031] A charging control module is used to perform charging control according to the charging current and the charging voltage based on the working condition of the currently displayed SOC.

[0032] On the other hand, an embodiment of the present invention provides a storage medium, wherein the storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the above-mentioned charging control method.

[0033] On the other hand, an embodiment of the present invention provides a battery management system, including a memory and a processor, wherein the memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions, wherein the program instructions implement the steps of the above-mentioned charging control method when loaded and executed by the processor.

[0034] In the technical solution of the charging control method provided by the embodiment of the present invention, in response to the charging permission instruction sent by the VCU, the charging current and charging voltage are obtained; the current battery pack temperature is obtained, and if the current battery pack temperature is greater than or equal to the second set threshold, the current displayed SOC is obtained and the working condition of the current displayed SOC is determined; based on the working condition of the current displayed SOC, charging control is performed according to the charging current and charging voltage. In the technical solution provided by the embodiment of the present invention, charging control can be performed according to different working conditions of the current displayed SOC, and the battery does not need to be fully charged every time, and the battery is not easy to age, thereby improving the battery life and the life of the whole vehicle.

Brief Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A flow chart of a charging control method provided by an embodiment of the present invention;

[0037] Figure 2 A flowchart of another charging control method provided by an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of the structure of a charging control device provided by an embodiment of the present invention;

[0039] Figure 4 A schematic diagram of a battery management system provided by an embodiment of the present invention. [Specific implementation method]

[0040] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0041] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0043] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0044] An embodiment of the present invention provides a charging control method. Figure 1 A flow chart of a charging control method provided by an embodiment of the present invention is as follows: Figure 1 As shown, the method includes:

[0045] Step 102: The BMS obtains the charging current and charging voltage in response to the charging permission instruction sent by the vehicle control unit (VCU).

[0046] In an embodiment of the present invention, the charging current corresponding to the current power and the current battery pack temperature can be queried based on the correspondence between the power, battery pack temperature and charging current in the stored charging request current table, and the set charging cut-off voltage can be set as the charging voltage.

[0047] Step 104 : If the current battery pack temperature obtained by the BMS is greater than or equal to the set temperature threshold, the BMS obtains the currently displayed state of charge (State of Charge, SOC for short) and determines the working condition of the currently displayed SOC.

[0048] Step 106 : The BMS performs charging control according to the charging current and charging voltage based on the current operating condition of the displayed SOC.

[0049] Specifically, if the highest single cell voltage has triggered the charging setting point before the currently displayed SOC reaches the first set threshold, charging is performed according to the charging current and the charging voltage, and the currently displayed SOC is charged to the set power threshold and charging is continued; or, if the highest single cell voltage has triggered the full charge setting point before the currently displayed SOC reaches the first threshold, charging is stopped; or, if the currently displayed SOC is falsely high or normal, charging is performed according to the charging current and the charging voltage, and the currently displayed SOC is charged to the set power threshold and charging is continued.

[0050] In the technical solution provided by the embodiment of the present invention, in response to the charging permission instruction sent by the VCU, the charging current and charging voltage are obtained; the current battery pack temperature is obtained, and if the current battery pack temperature is greater than or equal to the second set threshold, the current displayed SOC is obtained and the working condition of the current displayed SOC is determined; based on the working condition of the current displayed SOC, charging control is performed according to the charging current and charging voltage. In the technical solution provided by the embodiment of the present invention, charging control can be performed according to different working conditions of the current displayed SOC, and the battery does not need to be fully charged every time, and the battery is not easily aged, thereby improving the battery life and the life of the whole vehicle.

[0051] An embodiment of the present invention provides another charging control method. Figure 2 A flow chart of a charging control method provided by an embodiment of the present invention is as follows: Figure 2 As shown, the method includes:

[0052] Step 202: The vehicle computer receives the charging mode information input by the user, and sends the charging mode information to the VCU.

[0053] In the embodiment of the present invention, the user can select the charging mode information by clicking a button on the display screen. For example, the charging mode information includes a standard mode or a long life mode.

[0054] Step 204: The VCU sends charging mode information to the BMS.

[0055] Step 206: When the BMS receives the charging port connection signal sent by the VCU, it determines to set the power threshold according to the charging mode information.

[0056] In the embodiment of the present invention, when the user inserts the charging gun into the vehicle, the VCU receives a charging port connection signal, and the VCU sends a charging port connection signal to the BMS.

[0057] In the embodiment of the present invention, the power threshold can be set according to actual conditions. For example, the power threshold can be set to 95%, 90% or 80%.

[0058] In the embodiment of the present invention, the upper limit of the charging power (i.e., the power threshold value) can be determined according to the charging mode information before the charging gun is connected, and the upper limit of the charging power can no longer be determined according to the charging mode information after the charging gun is connected. If the charging mode information is the standard mode, the power threshold value is set to 100%, and the normal charging mode is performed; if the charging mode information is the long life mode, the power threshold value can be set to 90%, and step 208 is executed.

[0059] Step 208 , the BMS obtains the currently displayed SOC and determines whether the currently displayed SOC is greater than or equal to the set power threshold. If so, execute step 210 ; if not, execute step 212 .

[0060] Step 210: The BMS does not charge the battery, and the process ends.

[0061] Step 212: The BMS sends a first charging instruction to the VCU.

[0062] Step 214: The VCU sets the vehicle mode to the first charging mode in response to the first charging instruction, and sends a second charging instruction to the BMS.

[0063] Step 216 , the BMS obtains the current battery pack temperature in response to the second charging instruction, and determines whether the current battery pack temperature is less than a set temperature threshold. If so, execute step 218 ; if not, execute step 228 .

[0064] In the embodiment of the present invention, the temperature threshold can be set according to actual conditions. For example, the temperature threshold can be set to 0°C.

[0065] Step 218: The BMS heats the battery, closes the battery relay for pre-charging, and sends a third charging instruction to the VCU.

[0066] In the embodiment of the present invention, the BMS enters the charging and heating process, heats the battery, closes the battery relay for pre-charging, and sends a third charging instruction to the VCU.

[0067] Step 220: The VCU sets the vehicle mode to the second charging mode in response to the third charging instruction, and sends a charging permission instruction to the BMS.

[0068] Step 222: The BMS obtains the charging current and the charging voltage in response to the charging permission instruction sent by the VCU.

[0069] In an embodiment of the present invention, the charging current corresponding to the current power and the current battery pack temperature can be queried based on the correspondence between the power, battery pack temperature and charging current in the stored charging request current table, and the set charging cut-off voltage can be set as the charging voltage.

[0070] Step 224 , the BMS determines whether the current battery pack temperature is greater than or equal to the set temperature threshold. If so, execute step 226 ; if not, execute step 218 .

[0071] Step 226 : The BMS obtains the currently displayed SOC and determines the operating condition of the currently displayed SOC.

[0072] Step 228: The BMS controls charging according to the charging current and charging voltage based on the current displayed SOC operating condition.

[0073] Specifically, if the currently displayed SOC is falsely low (the highest single cell voltage has triggered the charging set point before the currently displayed SOC reaches the first set threshold), charging is performed according to the charging current and the charging voltage, the currently displayed SOC is charged to the set power threshold and charging is continued, and the charging time may be 0.6% battery capacity / charging current; or,

[0074] If the currently displayed SOC is falsely low (the highest cell voltage has triggered the full charge position before the currently displayed SOC reaches the first threshold), stop charging; or,

[0075] If the currently displayed SOC is falsely high or normal, charging is performed according to the charging current and charging voltage, and the currently displayed SOC is charged to the set power threshold and charging is continued. The charging time can be 0.6% battery capacity / charging current.

[0076] Step 230 : The BMS displays that the currently displayed SOC is the set power threshold, wherein the maximum clamping value of the currently displayed SOC is the set power threshold.

[0077] Step 232: The BMS sets the current real SOC to the smaller one between the current real SOC and the set power threshold.

[0078] Step 234: The BMS sends a charging end instruction to the VCU.

[0079] In this step, the BMS finishes charging and sends a charging end instruction to the VCU.

[0080] Step 236: The VCU sets the vehicle mode to a non-charging mode according to the charging end instruction and stops charging.

[0081] In the technical solution provided by the embodiment of the present invention, in response to the charging permission instruction sent by the VCU, the charging current and charging voltage are obtained; the current battery pack temperature is obtained, and if the current battery pack temperature is greater than or equal to the second set threshold, the current displayed SOC is obtained and the working condition of the current displayed SOC is determined; based on the working condition of the current displayed SOC, charging control is performed according to the charging current and charging voltage. In the technical solution provided by the embodiment of the present invention, charging control can be performed according to different working conditions of the current displayed SOC, and the battery does not need to be fully charged every time, and the battery is not easily aged, thereby improving the battery life and the life of the whole vehicle.

[0082] In the technical solution provided by the embodiment of the present invention, a power threshold value, that is, an upper limit of the charging power, can be set to 90%, so that the battery does not need to be fully charged, thereby improving the battery life.

[0083] In the technical solution provided by the embodiment of the present invention, the battery is heated when the battery pack temperature is low, and the charging current is obtained based on the battery pack temperature during heating. Since the battery pack temperature is related to the size of the charging current (i.e., the charging speed), if the battery pack temperature can be maintained in a suitable temperature range, the charging speed and efficiency of the battery can be improved.

[0084] An embodiment of the present invention provides a charging control device. Figure 3 A schematic diagram of a charging control device according to an embodiment of the present invention is shown in FIG. Figure 3 As shown, the device includes: a first acquisition module 11, a second acquisition module 12 and a charging control module 13.

[0085] The first acquisition module 11 is used for acquiring the charging current and the charging voltage in response to the charging permission instruction sent by the VCU.

[0086] The second acquisition module 12 is used to acquire the currently displayed SOC and determine the working condition of the currently displayed SOC if the currently acquired battery pack temperature is greater than or equal to a set temperature threshold.

[0087] The charging control module 13 is used to perform charging control according to the charging current and charging voltage based on the working condition of the current displayed SOC.

[0088] In the embodiment of the present invention, the charging control module 13 is specifically used to charge the currently displayed SOC to the set power threshold and continue to maintain charging if the highest single cell voltage has triggered the charging setting point before the currently displayed SOC reaches the first set threshold; or, if the highest single cell voltage has triggered the full charge setting point before the currently displayed SOC reaches the first threshold, stop charging; or, if the currently displayed SOC is falsely high or normal, charge according to the charging current and charging voltage, charge the currently displayed SOC to the set power threshold and continue to maintain charging.

[0089] In the embodiment of the present invention, the device further includes: a display module 14 , a setting module 15 and a sending module 16 .

[0090] The display module 14 is used to display that the currently displayed SOC is a set power threshold, wherein the maximum clamping value of the currently displayed SOC is the set power threshold.

[0091] The setting module 15 is used to set the current real SOC to the smaller one between the current real SOC and the set power threshold.

[0092] The sending module 16 is used to send a charging end instruction to the VCU, so that the VCU sets the vehicle mode to a non-charging mode and stops charging according to the charging end instruction.

[0093] In the embodiment of the present invention, the device further includes: a heating module 17 .

[0094] The heating module 17 is used to heat the battery if the current battery pack temperature is lower than the set temperature threshold, close the battery relay for pre-charging, send a third charging instruction to the VCU so that the VCU sets the vehicle mode to the second charging mode in response to the third charging instruction, send a charging permission instruction to the BMS, and trigger the first acquisition module 11 to continue to execute the steps of acquiring the charging current and the charging voltage in response to the charging permission instruction sent by the VCU.

[0095] In the embodiment of the present invention, the device further includes: a determination module 18 , a control module 19 and a judgment module 20 .

[0096] The determination module 18 is used to determine and set a power threshold according to the charging mode information when receiving a charging port connection signal sent by the VCU.

[0097] The control module 19 is used to obtain the currently displayed SOC. If the currently displayed SOC is greater than or equal to the set power threshold, the battery is not charged; or, if the currently displayed SOC is less than the set power threshold, a first charging instruction is sent to the VCU, so that the VCU sets the vehicle mode to the first charging mode in response to the first charging instruction, and sends a second charging instruction to the BMS.

[0098] The judgment module 20 is used to respond to the second charging instruction, obtain the current battery pack temperature, and judge whether the current battery pack temperature is less than the set temperature threshold; if it is judged that the current battery pack temperature is less than the set temperature threshold, the heating module 17 is triggered to continue to execute the step of heating the battery.

[0099] In the embodiment of the present invention, if the judgment module 20 determines that the current battery pack temperature is greater than or equal to the set temperature threshold, the charging control module 13 is triggered to continue to execute the steps of performing charging control according to the charging current and charging voltage based on the working condition of the currently displayed SOC.

[0100] In the embodiment of the present invention, the charging mode information is received by the vehicle computer and sent to the VCU, and the VCU sends the charging mode information to the BMS.

[0101] In the technical solution provided by the embodiment of the present invention, in response to the charging permission instruction sent by the VCU, the charging current and charging voltage are obtained; the current battery pack temperature is obtained, and if the current battery pack temperature is greater than or equal to the second set threshold, the current displayed SOC is obtained and the working condition of the current displayed SOC is determined; based on the working condition of the current displayed SOC, charging control is performed according to the charging current and charging voltage. In the technical solution provided by the embodiment of the present invention, charging control can be performed according to different working conditions of the current displayed SOC, and the battery does not need to be fully charged every time, and the battery is not easily aged, thereby improving the battery life and the life of the whole vehicle.

[0102] The charging control device provided in this embodiment can be used to achieve the above Figure 1 and Figure 2 For the charging control method in the embodiment of the charging control method, the specific description can be found in the above-mentioned embodiment of the charging control method, which will not be repeated here.

[0103] An embodiment of the present invention provides a storage medium, which includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the steps of the embodiment of the above-mentioned charging control method. For a specific description, please refer to the embodiment of the above-mentioned charging control method.

[0104] An embodiment of the present invention provides a battery management system, including a memory and a processor, the memory is used to store information including program instructions, the processor is used to control the execution of the program instructions, and the program instructions are loaded and executed by the processor to implement the steps of the embodiment of the above-mentioned charging control method. For a specific description, please refer to the embodiment of the above-mentioned charging control method.

[0105] Figure 4 A schematic diagram of a battery management system provided by an embodiment of the present invention. Figure 4As shown, the battery management system 40 of this embodiment includes: a processor 41, a memory 42, and a computer program 43 stored in the memory 42 and executable on the processor 41. When the computer program 43 is executed by the processor 41, the charging control method in the embodiment is implemented. To avoid repetition, it is not described one by one here. Alternatively, when the computer program is executed by the processor 41, the functions of each model / unit in the charging control device in the embodiment are implemented. To avoid repetition, it is not described one by one here.

[0106] The battery management system 40 includes, but is not limited to, a processor 41 and a memory 42. Those skilled in the art will appreciate that Figure 4 This is only an example of the battery management system 40 and does not constitute a limitation of the battery management system 40. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the battery management system may also include input and output devices, network access devices, buses, etc.

[0107] The processor 41 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0108] The memory 42 may be an internal storage unit of the battery management system 40, such as a hard disk or memory of the battery management system 40. The memory 42 may also be an external storage device of the battery management system 40, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the battery management system 40. Further, the memory 42 may also include both an internal storage unit of the battery management system 40 and an external storage device. The memory 42 is used to store computer programs and other programs and data required by the battery management system. The memory 42 may also be used to temporarily store data that has been output or is to be output.

[0109] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0110] In the several embodiments provided by the present invention, 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 an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0111] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0112] In addition, each functional unit in each embodiment of the present invention 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-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0113] 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 (Processor) to perform some steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0114] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A charging control method, characterized in that: include: In response to a charging permission instruction sent by the VCU, obtaining a charging current and a charging voltage; If the current battery pack temperature is greater than or equal to the set temperature threshold, the current displayed SOC is obtained and the working condition of the current displayed SOC is determined; Based on the operating condition of the currently displayed SOC, charging control is performed according to the charging current and the charging voltage.

2. The method according to claim 1, characterized in that The step of controlling charging based on the operating condition of the currently displayed SOC and according to the charging current and the charging voltage includes: If the highest cell voltage has triggered the charging set point before the currently displayed SOC reaches the first set threshold, charging is performed according to the charging current and the charging voltage to charge the currently displayed SOC to the set power threshold and continue to maintain charging; or, If the highest cell voltage has triggered the full charge position before the currently displayed SOC reaches the first threshold, charging is stopped; or, If the currently displayed SOC is falsely high or normal, charging is performed according to the charging current and the charging voltage, and the currently displayed SOC is charged to a set power threshold and charging is continued.

3. The method according to claim 1, characterized in that: After the operating condition based on the currently displayed SOC is used to perform charging control according to the charging current and the charging voltage, the method further comprises: Displaying the currently displayed SOC as a set power threshold, wherein the maximum clamping value of the currently displayed SOC is the set power threshold; Setting the current real SOC to the smaller of the current real SOC and the set power threshold; A charging end instruction is sent to the VCU, so that the VCU sets the vehicle mode to a non-charging mode according to the charging end instruction and stops charging.

4. The method according to claim 1, characterized in that: Also includes: If the current battery pack temperature is lower than the set temperature threshold, the battery is heated, and the battery relay is closed for pre-charging, and a third charging instruction is sent to the VCU so that the VCU sets the vehicle mode to the second charging mode in response to the third charging instruction, and sends a charging permission instruction to the BMS, and continues to execute the steps of obtaining the charging current and the charging voltage in response to the charging permission instruction sent by the VCU.

5. The method according to claim 4, characterized in that Before heating the battery, the method includes: When receiving the charging port connection signal sent by the VCU, the power threshold is set according to the charging mode information; Obtaining the currently displayed SOC, and if the currently displayed SOC is greater than or equal to a set power threshold, not charging the battery; or, If the currently displayed SOC is less than the set power threshold, a first charging instruction is sent to the VCU, so that the VCU sets the vehicle mode to the first charging mode in response to the first charging instruction, and sends a second charging instruction to the BMS; In response to the second charging instruction, obtaining a current battery pack temperature, and determining whether the current battery pack temperature is less than a set temperature threshold; If it is determined that the current battery pack temperature is lower than the set temperature threshold, the step of heating the battery is continued.

6. The method according to claim 5, characterized in that Also includes: If it is determined that the current battery pack temperature is greater than or equal to the set temperature threshold, continue to execute the step of performing charging control based on the operating condition of the currently displayed SOC and the charging current and the charging voltage.

7. The method according to claim 5, characterized in that The charging mode information is received by the vehicle computer as input by the user and sent to the VCU, and the VCU sends the charging mode information to the BMS.

8. A charging control device, characterized in that: include: A first acquisition module, configured to acquire a charging current and a charging voltage in response to a charging permission instruction sent by the VCU; A second acquisition module, configured to acquire the currently displayed SOC and determine the working condition of the currently displayed SOC if the currently acquired battery pack temperature is greater than or equal to a set temperature threshold; A charging control module is used to perform charging control according to the charging current and the charging voltage based on the working condition of the currently displayed SOC.

9. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the charging control method according to any one of claims 1 to 7.

10. A battery management system, comprising a memory and a processor, wherein the memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions, characterized in that: When the program instructions are loaded and executed by the processor, the steps of the charging control method according to any one of claims 1 to 7 are implemented.

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