A charging control method and device, storage medium and battery management system

Abstract

Embodiments of the present application provide a charging control method and device, a storage medium and a battery management system. The method comprises: in response to a charging permission instruction sent by a VCU, obtaining a charging current and a charging voltage; obtaining a current battery pack temperature, and if the current battery pack temperature is greater than or equal to a second set threshold, obtaining a current display SOC and determining a working condition of the current display SOC; and based on the working condition of the current display SOC, performing charging control according to the charging current and the charging voltage. In the technical solution provided by the embodiments of the present application, the charging control can be performed according to different working conditions of the current display SOC, the battery is not required to be fully charged every time, the battery is less likely to be aged, and the battery life and the vehicle life are improved.

Description

[Technical Field]

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

[0002] A Battery Management System (BMS) is a control system that protects the safety of power batteries. It monitors the battery's status at all times, ensuring the safety of new energy vehicles, and is widely used in pure electric vehicles. The charging process is the most involved stage in electric vehicles, and its quality often determines the overall quality of the vehicle; therefore, the charging control method is a crucial factor.

[0003] There are two main ways to charge electric vehicles: one is fast charging using public charging stations, and the other is slow charging using home charging devices. Regardless of whether it's fast or slow charging, the user connects the charging gun to the electric vehicle, and the vehicle automatically charges the battery. However, fully charging the battery every time can lead to overcharging, battery aging, and a shorter battery and vehicle lifespan. [Summary of the Invention]

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

[0005] On one hand, embodiments of the present invention provide a charging control method, including:

[0006] In response to the charging permission command sent by the VCU, the charging current and charging voltage are obtained;

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

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

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

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

[0011] If the highest single-cell voltage has triggered the full charge point 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 to charge the currently displayed SOC to the set power threshold and continue charging.

[0013] Optionally, after performing charging control based on the current charging current and the charging voltage according to the current displayed SOC operating condition, the process includes:

[0014] The current displayed SOC is set to a power threshold, wherein the maximum clamping value of the current displayed SOC is the set power threshold;

[0015] Set the current true SOC to the smaller of the current true SOC and the set power threshold;

[0016] Send a charging end command to the VCU so that the VCU can set the vehicle mode to non-charging mode and stop charging according to the charging end command.

[0017] Optionally, it also includes:

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

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

[0020] When a charging port connection signal is received from the VCU, the set power threshold is determined based on the charging mode information.

[0021] Obtain the current displayed SOC; if the current displayed SOC is greater than or equal to a set battery threshold, then do not charge the battery; or,

[0022] If the current displayed SOC is less than the set power threshold, a first charging command is sent to the VCU, so that the VCU can respond to the first charging command by setting the vehicle mode to the first charging mode and sending a second charging command to the BMS.

[0023] In response to the second charging command, the current battery pack temperature is obtained, and it is determined whether the current battery pack temperature is lower 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 continues.

[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, the step of performing charging control based on the current displayed SOC and the charging current and the charging voltage continues.

[0027] Optionally, the charging mode information is received by the vehicle system from the user's input of the charging mode information and sent to the VCU, which in turn sends the charging mode information to the BMS.

[0028] On the other hand, embodiments of the present invention provide a charging control device, including:

[0029] The first acquisition module is used to acquire the charging current and charging voltage in response to the charging permission command sent by the VCU;

[0030] The second acquisition module is used to acquire the current displayed SOC and determine the operating condition of the current displayed SOC if the acquired current battery pack temperature is greater than or equal to a set temperature threshold.

[0031] The charging control module is used to perform charging control based on the current displayed SOC and the charging current and the charging voltage.

[0032] On the other hand, embodiments of the present invention provide a storage medium including a stored program, wherein the program controls the device where the storage medium is located to execute the above-described charging control method during runtime.

[0033] On the other hand, embodiments of the present invention provide a battery management system, including a memory and a processor. The memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions. When the program instructions are loaded and executed by the processor, the steps of the above-described charging control method are implemented.

[0034] In the charging control method provided by this invention, in response to a charging permission command sent by the VCU, the charging current and charging voltage are acquired; the current battery pack temperature is acquired; if the current battery pack temperature is greater than or equal to a second preset threshold, the current displayed SOC is acquired and the operating condition of the current displayed SOC is determined; based on the operating condition of the current displayed SOC, charging control is performed according to the charging current and charging voltage. The technical solution provided by this invention allows for charging control based on different operating conditions of the current displayed SOC, eliminating the need to fully charge the battery every time, reducing battery aging, and improving battery life and vehicle lifespan. [Attached Image Description]

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

[0036] Figure 1 A flowchart of a charging control method provided in an embodiment of the present invention;

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

[0038] Figure 3 This is a schematic diagram of a charging control device according to an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of a battery management system provided in an embodiment of the present invention.

Detailed Implementation Methods

[0040] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0043] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0044] One embodiment of the present invention provides a charging control method. Figure 1 A flowchart of a charging control method provided in an embodiment of the present invention is shown below. Figure 1 As shown, the method includes:

[0045] Step 102: The BMS responds to the charging permission command sent by the Vehicle Control Unit (VCU) and obtains the charging current and charging voltage.

[0046] In this embodiment of the invention, the charging current corresponding to the current battery level and current battery pack temperature can be queried according to the correspondence between the battery level, battery pack temperature and charging current in the stored charging request current table, and the set charging cutoff 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, obtain the current displayed State of Charge (SOC) and determine the operating condition of the current displayed SOC.

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

[0049] Specifically, if the highest single-cell voltage before the currently displayed SOC reaches the first set threshold has triggered the charging set point, 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 charging; or, if the highest single-cell voltage before the currently displayed SOC reaches the first threshold has triggered the full charge set point, 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 to charge the currently displayed SOC to the set power threshold and continue charging.

[0050] In the technical solution provided by this invention, in response to a charging permission command sent by the VCU, the charging current and charging voltage are acquired; the current battery pack temperature is acquired; if the current battery pack temperature is greater than or equal to a second preset threshold, the current displayed SOC is acquired and the operating condition of the current displayed SOC is determined; based on the operating condition of the current displayed SOC, charging control is performed according to the charging current and charging voltage. In the technical solution provided by this invention, charging control can be performed according to different operating conditions of the current displayed SOC, eliminating the need to fully charge the battery every time, reducing battery aging, and improving battery life and vehicle lifespan.

[0051] One embodiment of the present invention provides another charging control method. Figure 2 A flowchart of a charging control method provided in an embodiment of the present invention is shown below. Figure 2 As shown, the method includes:

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

[0053] In this embodiment of the invention, the user can select charging mode information by clicking a button on the display screen. For example, the charging mode information includes standard mode or 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 the set power threshold based on the charging mode information.

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

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

[0058] In this embodiment of the invention, the upper limit of the charging capacity (i.e., setting a power threshold) can be determined based on the charging mode information before the charging gun is connected. After the charging gun is connected, the upper limit of the charging capacity no longer needs to be determined based on the charging mode information. If the charging mode information is standard mode, the power threshold is set to 100%, and a normal charging mode is performed; if the charging mode information is long-life mode, the power threshold can be set to 90%, and step 208 is executed.

[0059] Step 208: The BMS obtains the current displayed SOC and determines whether the current displayed SOC is greater than or equal to the set power threshold. If yes, proceed to step 210; otherwise, proceed to step 212.

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

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

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

[0063] Step 216: In response to the second charging command, the BMS obtains the current battery pack temperature and determines whether the current battery pack temperature is lower than the set temperature threshold. If yes, proceed to step 218; otherwise, proceed to step 228.

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

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

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

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

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

[0069] In this embodiment of the invention, the charging current corresponding to the current battery level and current battery pack temperature can be queried according to the correspondence between the battery level, battery pack temperature and charging current in the stored charging request current table, and the set charging cutoff 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 yes, proceed to step 226; otherwise, proceed to step 218.

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

[0072] Step 228: The BMS performs charging control based on the current operating conditions of the displayed SOC, according to the charging current and charging voltage.

[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 to charge the currently displayed SOC to the set capacity threshold and continue charging. The charging time can be 0.6% battery capacity / charging current; or,

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

[0075] If the current displayed SOC is falsely high or normal, charging will proceed according to the charging current and charging voltage, charging the current displayed SOC to the set power threshold and continuing to maintain charging. The charging time can be 0.6% of the battery capacity / charging current.

[0076] Step 230: The BMS displays the current SOC as the set power threshold, where the maximum clamping value of the current SOC is the set power threshold.

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

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

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

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

[0081] In the technical solution provided by this invention, in response to a charging permission command sent by the VCU, the charging current and charging voltage are acquired; the current battery pack temperature is acquired; if the current battery pack temperature is greater than or equal to a second preset threshold, the current displayed SOC is acquired and the operating condition of the current displayed SOC is determined; based on the operating condition of the current displayed SOC, charging control is performed according to the charging current and charging voltage. In the technical solution provided by this invention, charging control can be performed according to different operating conditions of the current displayed SOC, eliminating the need to fully charge the battery every time, reducing battery aging, and improving battery life and vehicle lifespan.

[0082] In the technical solution provided by the embodiments of the present invention, a power threshold can be set, that is, the upper limit of the charging power is 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 embodiments of the present invention, the battery is heated when the battery pack temperature is low, and the charging current is obtained according to the battery pack temperature during heating. Since the battery pack temperature is related to the magnitude 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] One embodiment of the present invention provides a charging control device. Figure 3 This is a schematic diagram of a charging control device according to an embodiment of the present invention, as shown below. 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 to acquire the charging current and charging voltage in response to the charging permission command sent by the VCU.

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

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

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

[0089] In this embodiment of the 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 the current displayed SOC as the set power threshold, wherein the maximum clamping value of the current displayed SOC is the set power threshold.

[0091] Setting module 15 is used to set the current true SOC to the smaller of the current true SOC and the set power threshold.

[0092] The sending module 16 is used to send a charging end command to the VCU, so that the VCU can set the vehicle mode to non-charging mode and stop charging according to the charging end command.

[0093] In this embodiment of the 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 command to the VCU so that the VCU can set the vehicle mode to the second charging mode in response to the third charging command, send a charging permission command to the BMS, and trigger the first acquisition module 11 to continue to execute the steps of acquiring the charging current and charging voltage in response to the charging permission command sent by the VCU.

[0095] In this embodiment of the invention, the device further includes: a determining module 18, a control module 19, and a judging module 20.

[0096] The determination module 18 is used to determine the set power threshold based on the charging mode information when it receives the charging port connection signal sent by the VCU.

[0097] The control module 19 is used to obtain the current displayed SOC. If the current displayed SOC is greater than or equal to the set power threshold, the battery will not be charged. Alternatively, if the current displayed SOC is less than the set power threshold, a first charging command is sent to the VCU, so that the VCU can set the vehicle mode to the first charging mode in response to the first charging command and send a second charging command to the BMS.

[0098] The judgment module 20 is used to respond to the second charging command, obtain the current battery pack temperature, and determine whether the current battery pack temperature is less than the set temperature threshold; if it is determined 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 this embodiment of the invention, if the judgment module 20 determines that the current battery pack temperature is greater than or equal to the set temperature threshold, it triggers the charging control module 13 to continue executing the steps of charging control based on the current displayed SOC and the charging current and charging voltage.

[0100] In this embodiment of the invention, the charging mode information is received by the vehicle system from the user's input charging mode information and sent to the VCU, and then sent by the VCU to the BMS.

[0101] In the technical solution provided by this invention, in response to a charging permission command sent by the VCU, the charging current and charging voltage are acquired; the current battery pack temperature is acquired; if the current battery pack temperature is greater than or equal to a second preset threshold, the current displayed SOC is acquired and the operating condition of the current displayed SOC is determined; based on the operating condition of the current displayed SOC, charging control is performed according to the charging current and charging voltage. In the technical solution provided by this invention, charging control can be performed according to different operating conditions of the current displayed SOC, eliminating the need to fully charge the battery every time, reducing battery aging, and improving battery life and vehicle lifespan.

[0102] The charging control device provided in this embodiment can be used to achieve the above. Figure 1 and Figure 2 The charging control method described above can be found in the embodiments of the charging control method, and will not be repeated here.

[0103] This invention provides a storage medium that includes a stored program. When the program runs, it controls the device where the storage medium is located to execute the steps of the above-described charging control method. For a detailed description, please refer to the embodiments of the above-described charging control method.

[0104] This invention provides a battery management system, including a memory and a processor. The memory stores information including program instructions, and the processor controls the execution of the program instructions. When the program instructions are loaded and executed by the processor, they implement the steps of the above-described charging control method. For a detailed description, please refer to the embodiments of the above-described charging control method.

[0105] Figure 4 This is a schematic diagram of a battery management system provided as 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, it implements the charging control method described in the embodiment. To avoid repetition, these details are not elaborated here. Alternatively, when the computer program is executed by the processor 41, it implements the functions of each model / unit in the charging control device described in the embodiment. To avoid repetition, these details are not elaborated 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 understand that... Figure 4 This is merely an example of the battery management system 40 and does not constitute a limitation on the battery management system 40. It may include more or fewer components than shown, or combine certain components, or different components. For example, the battery management system may also include input / 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 (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), 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.

[0108] The memory 42 can be an internal storage unit of the battery management system 40, such as a hard disk or RAM of the battery management system 40. The memory 42 can also be an external storage device of the battery management system 40, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the battery management system 40. Furthermore, the memory 42 can include both internal storage units and external storage devices of the battery management system 40. The memory 42 is used to store computer programs and other programs and data required by the battery management system. The memory 42 can also be used to temporarily store data that has been output or will be output.

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

[0110] In the embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units through some interfaces, and may be electrical, mechanical, or other forms.

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

[0112] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0113] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[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 within the scope of protection of the present invention.

Claims

1. A charging control method, characterized in that, include: In response to the charging permission command sent by the VCU, the charging current and charging voltage are obtained; When a charging port connection signal is received from the VCU, a set power threshold is determined based on the charging mode information; the charging mode information includes a long-life mode, and the set power threshold corresponding to the long-life mode includes 95%, 90%, or 80%; Obtain the current displayed SOC; if the current displayed SOC is greater than or equal to a set power threshold, then do not charge the battery. or, If the current displayed SOC is less than the set power threshold, a first charging command is sent to the VCU, so that the VCU can respond to the first charging command by setting the vehicle mode to the first charging mode and sending a second charging command to the BMS. In response to the second charging command, the current battery pack temperature is obtained, and it is determined whether the current battery pack temperature is lower than a set temperature threshold. If it is determined that the current battery pack temperature is greater than or equal to the set temperature threshold, the current displayed SOC is obtained and the operating condition of the current displayed SOC is determined. Based on the current operating condition of the displayed SOC, charging control is performed according to the charging current and the charging voltage; The step of controlling charging based on the current displayed SOC, according to the charging current and the charging voltage, includes: If the highest single-cell voltage has triggered the charging setpoint before the current displayed SOC reaches the first set threshold, charging is performed according to the charging current and the charging voltage to charge the current displayed SOC to the set power threshold and continue charging; or... If the highest single-cell voltage has triggered the full charge point before the currently displayed SOC reaches the first set threshold, charging will stop; or... If the currently displayed SOC is falsely high or normal, 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 charging for a duration of 0.6% of the battery capacity.

2. The method according to claim 1, characterized in that, The charging control based on the current displayed SOC, after performing charging control according to the charging current and the charging voltage, includes: The current displayed SOC is set to a power threshold, wherein the maximum clamping value of the current displayed SOC is the set power threshold; Set the current true SOC to the smaller of the current true SOC and the set power threshold; Send a charging end command to the VCU so that the VCU can set the vehicle mode to non-charging mode and stop charging according to the charging end command.

3. 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, the battery relay is closed for pre-charging, a third charging command is sent to the VCU, so that the VCU can set the vehicle mode to the second charging mode in response to the third charging command, send a charging permission command to the BMS, and continue to execute the steps of obtaining the charging current and charging voltage in response to the charging permission command sent by the VCU.

4. The method according to claim 1, characterized in that, The charging mode information is received by the vehicle system from the user and sent to the VCU, which in turn sends the charging mode information to the BMS.

5. A charging control device, characterized in that, include: The first acquisition module is used to acquire the charging current and charging voltage in response to the charging permission command sent by the VCU; The determination module is used to determine a set power threshold based on charging mode information when it receives a charging port connection signal sent by the VCU; the charging mode information includes a long-life mode, and the set power threshold corresponding to the long-life mode includes 95%, 90%, or 80%; The control module is used to obtain the current displayed SOC. If the current displayed SOC is greater than or equal to a set power threshold, the battery will not be charged. Alternatively, if the current displayed SOC is less than the set power threshold, a first charging command will be sent to the VCU, so that the VCU can set the vehicle mode to the first charging mode in response to the first charging command and send a second charging command to the BMS. The judgment module is used to respond to the second charging command, obtain the current battery pack temperature, and determine whether the current battery pack temperature is less than a set temperature threshold. The second acquisition module is used to acquire the current displayed SOC and determine the operating condition of the current displayed SOC if the acquired current battery pack temperature is greater than or equal to a set temperature threshold. The charging control module is used to control charging based on the current displayed SOC and the charging current and the charging voltage. The step of controlling charging based on the current displayed SOC, according to the charging current and the charging voltage, includes: If the highest single-cell voltage has triggered the charging setpoint before the current displayed SOC reaches the first set threshold, charging is performed according to the charging current and the charging voltage to charge the current displayed SOC to the set power threshold and continue charging; or... If the highest single-cell voltage has triggered the full charge point before the currently displayed SOC reaches the first set threshold, charging will stop; or... If the currently displayed SOC is falsely high or normal, 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 charging for a duration of 0.6% of the battery capacity.

6. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the charging control method according to any one of claims 1 to 4.

7. 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, they implement the steps of the charging control method according to any one of claims 1 to 4.

Images