A power battery plug-in heat preservation control system, method, vehicle and medium

Abstract

The present invention discloses a power battery plug-in heat preservation control system, method, and vehicle, belonging to the field of electric vehicle technology, and includes: a battery management system, a T-BOX, a vehicle control unit, and a high-voltage control unit. By limiting the number of activations of the battery heat preservation heating or heat preservation cooling function, this patent can ensure that meaningless heat preservation operations are not performed when the vehicle frequently sleeps and wakes up, thereby saving energy. This patent limits the heat preservation wake-up time of the power battery, and this time is updated in real time based on the ambient temperature, the number of activations of the plug-in heat preservation function, and the sleep and wake-up state of the vehicle. This does not affect the battery's entry into the plug-in heat preservation or heating process, nor does it affect the interruption of the battery's heat preservation heating or heat preservation cooling state. This effectively avoids frequent heat preservation of the battery after the vehicle frequently sleeps and wakes up, thus saving energy.

Description

Technical Field

[0001] The invention discloses a power battery plug-in gun thermal insulation control system, method and vehicle, and belongs to the technical field of electric vehicles. Background Art

[0002] With the increasingly severe environmental and energy crises, new energy vehicles have become an irreversible trend in future development, with pure electric vehicles being the ultimate development direction. As a core component of pure electric vehicles, the performance of power batteries will seriously affect the technical level of the entire vehicle. Just as traditional fuel vehicles require continuous refueling to replenish energy, electric vehicles require continuous charging of power batteries. However, the charging efficiency of batteries at low or high temperatures is often very low. To improve charging efficiency, if the battery can be insulated before charging, keeping the battery temperature within the temperature range most suitable for charging, the charging efficiency will be greatly improved. Therefore, research on thermal insulation control methods and devices for power batteries has become a key technology in the development of electric vehicles.

[0003] With the continuous development of new energy vehicles, the demand for battery insulation in cold winters and hot summers is increasing to improve battery efficiency, leading to a growing variety of insulation modes and methods. To prevent interruptions in the insulation function due to abnormal charging termination, temperature fluctuations, signal loss, and abnormal wake-up during sleep, and to avoid frequent switching of the insulation function after charging is complete due to changes in user-defined SOC or battery power loss caused by vehicle power consumption, the charging state may switch back and forth frequently, thus affecting the activation of the insulation function. Summary of the Invention

[0004] To address the shortcomings of the existing technology, the present invention proposes a power battery plug-in insulation control system, method, vehicle, and medium. By acquiring real-time status information of the charger, vehicle, and battery, the control system controls the battery's insulation status and insulation strategy, preventing the battery temperature from being too high or too low, extending the battery life, improving charging efficiency, and ensuring charging safety.

[0005] The technical solutions of the present invention are as follows:

[0006] According to a first aspect of an embodiment of the present invention, a power battery plug-in heat preservation control system is provided, comprising:

[0007] The battery management system is used to obtain the vehicle wake-up status, charging gun connection status, insulation function activation times, power battery heating status information, power battery charging status information, and current power battery temperature before the vehicle is powered off or enters sleep mode to determine whether the power battery meets the conditions for activating the insulation function;

[0008] If yes, it is also used to obtain the ambient temperature, determine the warm-keeping wake-up time according to the ambient temperature and the current power battery temperature, and send it to the T-BOX before entering the normal sleep process;

[0009] T-BOX is used to count down after receiving the thermal insulation wake-up timer. When the time is reached, it sends the vehicle wake-up command and battery thermal insulation command to the vehicle control unit and battery management system;

[0010] The battery management system is further configured to receive a power battery insulation instruction and obtain a current power battery SOC value to determine whether the insulation condition is met, and if so, send a power battery insulation request to the vehicle control unit;

[0011] The vehicle control unit is configured to receive the power battery insulation request and send a power-on instruction and approve the power battery insulation request to the high-voltage control unit and the battery management system respectively;

[0012] A high-voltage control unit, configured to receive a power-on instruction and execute a power-on operation;

[0013] The battery management system is also used to receive a request for approval of power battery heat preservation from the vehicle control unit and start the heat preservation function.

[0014] Preferably, it also includes:

[0015] Get whether the battery insulation instruction sent by the vehicle controller is not allowed:

[0016] If yes, the power battery heat preservation function is controlled to exit;

[0017] If no, proceed to the next step;

[0018] Get the charging gun connection status to determine whether it is disconnected or abnormally connected:

[0019] If yes, the power battery heat preservation function is controlled to exit;

[0020] No, continue to execute the power battery insulation function.

[0021] Preferably, it also includes:

[0022] Get the current power battery temperature and determine whether it has reached the limit for thermal insulation heating or thermal insulation cooling shutdown:

[0023] If yes, the power battery heat preservation function is controlled to exit;

[0024] If no, proceed to the next step;

[0025] Get the duration of the heat preservation function and check whether it is greater than 2 hours:

[0026] If yes, the power battery heat preservation function is controlled to exit;

[0027] No, continue to execute the power battery insulation function.

[0028] Preferably, the obtaining of the vehicle wake-up state, the charging gun connection state, the number of activations of the keep-warm function, the power battery heating state information, the power battery charging state information, and the current power battery temperature to determine whether the power battery meets the conditions for activating the keep-warm function includes:

[0029] Determine whether the charging gun is connected based on the charging gun connection status:

[0030] Yes, proceed to the next step;

[0031] No, exit and determine whether the power battery has the conditions to enable the insulation function;

[0032] Determine whether the activation times of the insulation function are less than or equal to the limited activation times:

[0033] Yes, proceed to the next step;

[0034] No, exit the process of judging whether the power battery meets the conditions for starting the thermal insulation function (or re-judge);

[0035] Determine whether the current power battery temperature is within the insulation limit range:

[0036] Yes, proceed to the next step;

[0037] No, no insulation is required;

[0038] Determine whether the power battery is in a heating state according to the power battery heating state information:

[0039] If yes, the power battery is heated first, and the judgment is made after the heating is completed;

[0040] If no, proceed to the next step;

[0041] Determine whether the power battery is in a charging state according to the power battery charging state information:

[0042] If yes, the power battery is charged first, and the judgment is made after the charging is completed;

[0043] Determine whether the current power battery temperature is lower than the minimum value of the thermal insulation limit range:

[0044] Yes, the power battery meets the entry conditions for thermal insulation and heating;

[0045] No, the power battery meets the entry conditions for thermal insulation and cooling.

[0046] Preferably, the step of determining the warm-keeping wake-up time according to the ambient temperature and the current temperature of the power battery includes:

[0047] Determine whether the ambient temperature is between 10-35°C:

[0048] Yes, the warm-keeping wake-up timer is 12 hours;

[0049] If no, obtain the temperature change rate, and determine the warm-keeping wake-up timer according to the temperature change rate, the current power battery temperature, and the ambient temperature.

[0050] Preferably, the obtaining of the current power battery SOC value to determine whether the conditions for entering the heat preservation state are met includes:

[0051] Obtain the current power battery SOC value and determine whether it is ≥ (X-5)%:

[0052] If yes, the power battery meets the conditions for entering the heat preservation stage, and the next step is executed;

[0053] If no, the power battery is charged first, and the judgment is made after the charging is completed;

[0054] Where X is the user-defined SOC value or the system default fully charged SOC value.

[0055] Preferably, the limited number of activation times is 3 times.

[0056] According to a second aspect of an embodiment of the present invention, a method for controlling the thermal insulation of a power battery plug gun is provided, which is applied to the thermal insulation control system for the power battery plug gun described in the first aspect, comprising:

[0057] Before the vehicle is powered off or enters sleep mode, the vehicle wake-up status, charging gun connection status, number of activations of the insulation function, power battery heating status information, power battery charging status information, and current power battery temperature are obtained to determine whether the power battery meets the conditions for activating the insulation function;

[0058] If yes, then obtain the ambient temperature, determine the warm-keeping wake-up timer based on the ambient temperature and the current power battery temperature, and send it to the T-BOX before entering the normal sleep process;

[0059] When receiving the power battery insulation instruction from T-BOX and obtaining the current power battery SOC value, it determines whether the conditions for entering insulation are met;

[0060] If so, a power battery insulation request is sent to the vehicle control unit. When the vehicle control unit receives the power battery insulation request, the insulation function is turned on.

[0061] According to a third aspect of an embodiment of the present invention, a vehicle is provided, comprising a vehicle body and a power battery plug-in heat preservation control system according to the second aspect.

[0062] According to a fourth aspect of an embodiment of the present invention, a non-transitory computer-readable storage medium is provided. When instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method described in the second aspect of the embodiment of the present invention.

[0063] According to a fifth aspect of the embodiments of the present invention, an application product is provided. When the application product is running on a terminal, the terminal executes the method described in the second aspect of the embodiments of the present invention.

[0064] This patent provides a power battery plug-in heat preservation control system, method, vehicle and medium, with the following beneficial effects:

[0065] (1) The number of activations for the battery heat preservation or cooling function is limited. This number of activations is related to whether the vehicle receives the battery heat preservation or cooling command, whether the vehicle ignition switch is turned on, the charging gun is unplugged, and whether the vehicle meets the heat preservation activation conditions after waking up from sleep mode. This ensures that meaningless heat preservation operations are not performed when the vehicle frequently wakes up from sleep mode, thus saving energy. The battery heat preservation function has a lower priority than the AC charging priority. If the BMS determines that the SOC has not reached full charge or has not reached the SOC value set by the user, it will charge or charge and heat without entering the heat preservation mode.

[0066] (2) This patent limits the power battery's heat preservation wake-up time. This time will be updated in real time based on the ambient temperature, the number of activations of the plug-in heat preservation function, and the vehicle's sleep and wake-up state, so as not to affect the battery's entry into the plug-in heat preservation or heating process, nor will it affect the interruption of the battery's heat preservation heating or heat preservation cooling state. Since it is impossible to distinguish the wake-up source, it is impossible to limit the number of function activations. It is necessary to ensure that the number of normal function activations does not exceed a certain number. This can effectively avoid frequent battery heat preservation after the vehicle frequently wakes up from sleep, thus saving energy. The activation of this strategy can be controlled by setting a calibration quantity to turn the function on and off.

[0067] (3) During the function on period, after the BMS is awakened, if it receives a T-BOX insulation request, it will be controlled according to the requested working condition threshold; if it does not receive a T-BOX insulation request, it will not be kept warm and only the wake-up time will be calculated.

[0068] (4) When the battery does not need to be charged, an anti-floating charge strategy is added. This strategy will directly start the temperature judgment of the insulation function to avoid frequent switching of the battery insulation state, thereby more intelligently controlling the insulation heating or insulation cooling state of the battery.

[0069] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 This is a structural block diagram of a power battery plug-in gun thermal insulation control system according to an exemplary embodiment;

[0071] Figure 2 The present invention is a flow chart showing a method for controlling the thermal insulation of a power battery plug gun according to an exemplary embodiment. DETAILED DESCRIPTION

[0072] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0073] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0074] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0075] Example 1

[0076] Figure 1 This is a block diagram of a power battery plug-in insulation control system according to an exemplary embodiment. The system includes a battery management system, a T-BOX, a vehicle control unit, and a high-voltage control unit. The battery management system is electrically connected to the T-BOX and the vehicle control unit, respectively, and the vehicle control unit is electrically connected to the high-voltage control unit. The following details the workings of each of these components and how they work together.

[0077] The battery management system is used to obtain the vehicle wake-up status, charging gun connection status, insulation function activation times, power battery heating status information, power battery charging status information, and current power battery temperature before the vehicle is powered off or enters sleep mode to determine whether the power battery meets the conditions for activating the insulation function. The specific contents are as follows:

[0078] Determine whether the charging gun is connected based on the charging gun connection status:

[0079] Yes, proceed to the next step;

[0080] No, exit and determine whether the power battery has the conditions to enable the insulation function;

[0081] Determine whether the number of activations of the keep warm function is less than or equal to the limited number of activations:

[0082] Yes, proceed to the next step;

[0083] No, exit the process of judging whether the power battery meets the conditions for starting the thermal insulation function (or re-judge);

[0084] Determine whether the current power battery temperature is within the insulation limit range:

[0085] Yes, proceed to the next step;

[0086] No, no insulation is required;

[0087] Determine whether the battery is in the heating state based on the power battery heating status information:

[0088] If yes, the power battery will be heated first, and the judgment will be made after the heating is completed;

[0089] If no, proceed to the next step;

[0090] Determine whether the power battery is in a charging state according to the power battery charging state information:

[0091] If yes, the power battery will be charged first, and the judgment will be made after the charging is completed;

[0092] Determine whether the current power battery temperature is lower than the minimum value of the thermal insulation limit range:

[0093] Yes, the power battery meets the entry conditions for thermal insulation and heating;

[0094] No, the power battery meets the entry conditions for thermal insulation and cooling.

[0095] The above-mentioned limited activation times are 3 times, and the insulation function activation times are when the battery management system receives the insulation instruction from the T-BOX and determines that the conditions for entering the battery insulation function are met, and then sends a battery insulation request signal to the vehicle control unit, and the activation times are increased by 1. In other words, when the battery management system turns on the insulation function and the temperature reaches the required temperature, it will clear the battery insulation request and count the activation times of the insulation function as one. After the function exits, the system goes into hibernation, which means that the insulation function has completed one activation. However, in a single ignition cycle, the activation times will accumulate until the limited number is reached and it will no longer respond; when the vehicle power status changes from OFF to ON, the function activation times are cleared; when the charging gun is unplugged, the function activation times are cleared. When the vehicle power status changes from ON to OFF, the function activation times are counted again.

[0096] When the conditions for enabling the keep warm function are met, the ambient temperature is obtained, and the keep warm wake-up timer is determined based on the ambient temperature and the current power battery temperature. This timer is sent to the T-BOX, and the T-BOX enters the normal sleep process. The specific steps for determining the keep warm wake-up timer based on the ambient temperature and the current power battery temperature are as follows:

[0097] After determining that the battery meets the entry conditions of the insulation function, if the battery pack is in other time periods before sleep, or the ambient temperature and battery temperature signals are invalid, the insulation wake-up time will send an invalid value; if the vehicle power status changes from OFF to ON during the vehicle wake-up timing, the timing will be stopped and the relevant status will be cleared; if the vehicle is awakened during the vehicle wake-up timing and a new timing duration signal is received, the timing will be restarted according to the new duration signal. Determine whether the ambient temperature is between 10-35℃ based on the obtained ambient temperature:

[0098] Yes, the keep warm wake-up timer is 12 hours;

[0099] No, obtain the temperature change rate, and interpolate and look up the table based on the temperature change rate, the current power battery temperature, and the ambient temperature to determine the warm-keeping wake-up time.

[0100] The battery cooling wake-up time is determined by the difference between the lowest temperature and the ambient temperature; the battery heating wake-up time is determined by the difference between the highest temperature and the ambient temperature.

[0101] After receiving the thermal insulation wake-up timer, T-BOX starts counting down. When the time is reached, it sends a vehicle wake-up command and a battery thermal insulation command to the vehicle control unit and battery management system.

[0102] The battery management system receives the power battery insulation instruction and obtains the current power battery SOC value to determine whether the conditions for entering insulation are met. The specific steps are as follows:

[0103] If the default SOC value of a fully charged battery is X%, where X is a user-defined SOC or the system's default fully charged SOC value, and the vehicle is awakened and the insulation function is enabled, and the charging gun is fully connected, to prevent frequent floating charges on the battery, obtain the current power battery SOC value to determine whether it is ≥ (X-5)%:

[0104] If yes, the power battery meets the conditions for entering the heat preservation stage, and a power battery heat preservation request is sent to the vehicle control unit;

[0105] If no, the power battery is charged first, and the judgment is made after the charging is completed;

[0106] The vehicle control unit receives the power battery insulation request and sends a power-on command to the high-voltage control unit. The high-voltage control unit receives the power-on command and performs the power-on operation. The battery management system receives the power battery insulation request issued by the vehicle control unit and turns on the insulation function.

[0107] After the battery management system turns on the insulation function, obtain the battery insulation instruction sent by the vehicle controller to see if it is not allowed:

[0108] Yes, control the power battery heat preservation function to exit;

[0109] If no, proceed to the next step;

[0110] Get the charging gun connection status to determine whether it is disconnected or abnormally connected:

[0111] Yes, control the power battery heat preservation function to exit;

[0112] No, continue to execute the power battery insulation function;

[0113] Get the current power battery temperature and determine whether it has reached the limit for thermal insulation heating or thermal insulation cooling shutdown:

[0114] Yes, control the power battery heat preservation function to exit;

[0115] If no, proceed to the next step;

[0116] Get the duration of the heat preservation function and check whether it is greater than 2 hours:

[0117] If yes, the power battery heat preservation function is controlled to exit;

[0118] No, continue to execute the power battery insulation function.

[0119] Example 2

[0120] Figure 2This is a flow chart of a method for controlling the thermal insulation of a power battery plug gun according to an exemplary embodiment, which is used in a battery management system of a power battery plug gun thermal insulation control system. The method includes the following steps:

[0121] Step 101: Before the vehicle is powered off and enters sleep mode, the vehicle wake-up status, charging gun connection status, number of activations of the keep-warm function, power battery heating status information, power battery charging status information, and current power battery temperature are obtained to determine whether the power battery meets the conditions for activating the keep-warm function.

[0122] Step 102: If yes, obtain the ambient temperature, determine the warm-keeping wake-up timer based on the ambient temperature and the current power battery temperature, and send it to the T-BOX before entering the normal sleep process;

[0123] Step 103: upon receiving the power battery heat preservation instruction sent by the T-BOX and obtaining the current power battery SOC value, determine whether the heat preservation condition is met;

[0124] Step 104: If yes, a power battery insulation request is sent to the vehicle control unit. When the vehicle control unit receives the power battery insulation request, the insulation function is turned on.

[0125] The present invention proposes a control method for heat preservation of an electric vehicle's power battery plug-in. Under the premise that the charging plug is connected and the power battery is not in need of charging, during the current power-on cycle, the heat preservation wake-up time is calculated by determining the battery temperature and the number of activations of the heat preservation function, and the power battery is controlled to execute the heat preservation heating or heat preservation cooling function. By limiting the number of activations of the battery heat preservation heating or heat preservation cooling function, which is related to whether the vehicle receives a battery heat preservation or cooling instruction, the activation of the vehicle's ignition switch, the removal of the charging plug-in, and whether the vehicle meets the heat preservation activation conditions after waking from sleep, this method ensures that meaningless heat preservation operations are not executed when the vehicle frequently wakes from sleep, thus saving energy. At the same time, the heat preservation wake-up time of the power battery is limited and updated in real time based on the ambient temperature, the number of activations of the heat preservation function of the plug-in, and the sleep-wake-up state of the vehicle. This does not affect the battery's entry into the heat preservation or heating process, nor does it affect the interruption of the battery's heat preservation heating or cooling state. In addition, when the battery does not need to be charged, the control method mentioned in the present invention adds an anti-floating charge strategy, which will directly start the temperature judgment of the insulation function to avoid frequent switching back and forth of the battery insulation state, thereby more intelligently controlling the battery insulation heating or insulation cooling state.

[0126] Example 5

[0127] In an exemplary embodiment, a computer-readable storage medium is further provided, on which a computer program is stored. When the program is executed by a processor, the power battery plug gun insulation control method provided in all the inventive embodiments of the present application is implemented.

[0128] Any combination of one or more computer-readable media may be employed. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having 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), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0129] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. Such a propagated data signal may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0130] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0131] Computer program code for performing the operations of the present invention 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 stand-alone 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 via 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).

[0132] Example 6

[0133] In an exemplary embodiment, an application product is also provided, including one or more instructions, which can be executed by the processor of the above-mentioned battery management system to implement the above-mentioned power battery plug-in gun insulation control method.

[0134] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and exemplary embodiments. They can be applied to a variety of fields suitable for the present invention. Further modifications will be readily apparent to those skilled in the art. Therefore, the present invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims

1. A power battery gun insulation control system, characterized in that: include: The battery management system is used to obtain the vehicle wake-up status, charging gun connection status, insulation function activation times, power battery heating status information, power battery charging status information, and current power battery temperature before the vehicle is powered off or enters sleep mode to determine whether the power battery meets the conditions for activating the insulation function; If yes, it is also used to obtain the ambient temperature, determine the warm-keeping wake-up time according to the ambient temperature and the current power battery temperature, and send it to the T-BOX before entering the normal sleep process; T-BOX is used to count down after receiving the thermal insulation wake-up timer. When the time is reached, it sends the vehicle wake-up command and battery thermal insulation command to the vehicle control unit and battery management system respectively; The battery management system is further configured to receive a power battery insulation instruction and obtain a current power battery SOC value to determine whether the insulation condition is met, and if so, send a power battery insulation request to the vehicle control unit; The vehicle control unit is configured to receive the power battery insulation request and send a power-on instruction and approve the power battery insulation request to the high-voltage control unit and the battery management system respectively; A high-voltage control unit, configured to receive a power-on instruction and execute a power-on operation; The battery management system is further configured to receive a request from the vehicle control unit to approve the power battery insulation and activate the insulation function; The obtaining of the vehicle wake-up status, charging gun connection status, number of activations of the keep-warm function, power battery heating status information, power battery charging status information, and current power battery temperature to determine whether the power battery meets the conditions for activating the keep-warm function includes: Determine whether the charging gun is connected based on the charging gun connection status: Yes, proceed to the next step; No, exit and determine whether the power battery has the conditions to enable the insulation function; Determine whether the activation times of the insulation function are less than or equal to the limited activation times: Yes, proceed to the next step; No, exit and determine whether the power battery has the conditions to enable the insulation function; Determine whether the current power battery temperature is within the insulation limit range: Yes, proceed to the next step; No, no insulation is required; Determine whether the power battery is in a heating state according to the power battery heating state information: If yes, the power battery is heated first, and the judgment is made after the heating is completed; If no, proceed to the next step; Determine whether the power battery is in a charging state according to the power battery charging state information: If yes, the power battery is charged first, and the judgment is made after the charging is completed; Determine whether the current power battery temperature is lower than the minimum value of the thermal insulation limit range: Yes, the power battery meets the entry conditions for thermal insulation and heating; No, the power battery meets the entry conditions for thermal insulation and cooling.

2. A power battery plug-in heat preservation control system according to claim 1, characterized in that: Also includes: Get whether the battery insulation instruction sent by the vehicle controller is not allowed: If yes, the power battery heat preservation function is controlled to exit; If no, proceed to the next step; Get the charging gun connection status to determine whether it is disconnected or abnormally connected: If yes, the power battery heat preservation function is controlled to exit; No, continue to execute the power battery insulation function.

3. A power battery gun thermal insulation control system according to claim 2, characterized in that: Also includes: Get the current power battery temperature and determine whether it has reached the limit for thermal insulation heating or thermal insulation cooling shutdown: If yes, the power battery heat preservation function is controlled to exit; If no, proceed to the next step; Get the duration of the heat preservation function and check whether it is greater than 2 hours: If yes, the power battery heat preservation function is controlled to exit; No, continue to execute the power battery insulation function.

4. A power battery gun thermal insulation control system according to claim 3, characterized in that: The step of determining the warm-keeping wake-up time according to the ambient temperature and the current power battery temperature includes: Determine whether the ambient temperature is between 10-35°C: Yes, the warm-keeping wake-up timer is 12 hours; If no, obtain the temperature change rate, and determine the warm-keeping wake-up timer according to the temperature change rate, the current power battery temperature, and the ambient temperature.

5. The power battery gun thermal insulation control system according to claim 4, characterized in that: The obtaining of the current power battery SOC value to determine whether the conditions for entering the heat preservation mode are met includes: Obtain the current power battery SOC value and determine whether it is ≥ (X-5)%: If yes, the power battery meets the conditions for entering the heat preservation stage, and the next step is executed; If no, the power battery is charged first, and the judgment is made after the charging is completed; Where X is the user-defined SOC value or the system default fully charged SOC value.

6. The power battery gun thermal insulation control system according to claim 5, characterized in that: The limited activation times are 3 times.

7. A method for controlling the heat preservation of a power battery plug gun, characterized in that: A power battery plug-in heat preservation control system applied to any one of claims 1-6, comprising: Before the vehicle is powered off or enters sleep mode, the vehicle wake-up status, charging gun connection status, number of activations of the insulation function, power battery heating status information, power battery charging status information, and current power battery temperature are obtained to determine whether the power battery meets the conditions for activating the insulation function; If yes, then obtain the ambient temperature, determine the warm-keeping wake-up timer based on the ambient temperature and the current power battery temperature, and send it to the T-BOX before entering the normal sleep process; When receiving the power battery insulation instruction from T-BOX and obtaining the current power battery SOC value, it determines whether the conditions for entering insulation are met; If so, a power battery insulation request is sent to the vehicle control unit. When the vehicle control unit receives the power battery insulation request, the insulation function is turned on.

8. A vehicle comprising a vehicle body and a power battery plug-in insulation control system according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the power battery plug-in heat preservation control method according to claim 7 is implemented.

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