Power battery thermal insulation control method and control system based on user reservation travel

Abstract

The present invention discloses a power battery thermal insulation control method based on user reservation travel, which obtains a reservation vehicle use instruction sent by the APP side, and determines the travel time t of the reservation vehicle use according to the reservation vehicle use instruction; obtains the cell temperature T1, the cabin temperature T2 and the cell power, and calculates the start time t of waking up the whole vehicle according to the start time of the reservation vehicle use, the cell temperature T1, the cabin temperature T2 and the cell power 唤醒 ; when reaching the start time t of waking up the whole vehicle 唤醒 , based on the cell temperature T1, the cabin temperature T2 and the cell power, select a control strategy, obtain electric energy from the charging pile, and perform power distribution among cell charging, cell preheating and cabin temperature adjustment. Through the existing charging process, the coupling among the three functions of cell charging, cell preheating and cabin temperature adjustment is realized. At the same time, the energy consumption only comes from the charging pile and does not consume the electric energy of the power battery, alleviating the user's range anxiety.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle overall vehicle control, and particularly relates to a power battery thermal insulation control method and control system based on user reservation for travel. Background Art

[0002] Currently, pure electric vehicles are becoming more and more popular and are increasingly recognized by the market. At the same time, considering aspects such as user convenience, practicality, and interestingness, the technologies carried by pure electric vehicles are becoming more and more diverse. However, whether it is a ternary lithium battery or a lithium iron phosphate battery, the negative impact of low temperature on the charge and discharge performance and cruising range of the power battery is still an important factor.

[0003] There are mainly two types of existing battery thermal insulation control methods. One type is to add a battery preheating process in the battery charging control, and the battery management system (BMS) monitors the cell temperature to actually judge the opening and closing of heating. Currently, the conventional AC and DC charging processes basically implement battery preheating according to such a control method, and the thermal insulation material of the battery itself is used to maintain the temperature of the battery. However, the application scenario of this method is limited to the charging scenario and is not manually controllable. Another type is to control through a digital audio (DA) screen or a mobile phone APP, send instructions or receive feedback through a telematics box (TBOX), and the vehicle end actually executes the battery heating function. Currently, by separately making a control process for the battery heating threshold or adding a battery heating device, the control logic becomes relatively complex, or directly using the electric energy of the power battery pack to preheat the battery will cause a part of the electric energy of the battery pack to be consumed when the user travels, thus affecting the available cruising range after travel, and the coupling of the three functions of cell charging, cell temperature regulation, and cabin temperature regulation cannot be realized, and only a single function can be completed, which brings inconvenience to the user's operation and range anxiety. Summary of the Invention

[0004] The purpose of the present invention is to provide a power battery thermal insulation control method and system based on user reservation for travel, to realize a user-controllable battery thermal insulation function, and at the same time, the energy consumption of battery thermal insulation can only come from the charging pile and does not consume the electric energy of the power battery, relieve the user's range anxiety, eliminate the need for waiting when using the vehicle, and improve the user experience.

[0005] To achieve the above purpose, the present invention provides a power battery thermal insulation control method based on user reservation for travel, including:

[0006] Step S1: Obtain a reservation vehicle use instruction sent by the APP end, and determine the travel time t of the reserved vehicle use according to the reservation vehicle use instruction;

[0007] Step S2: Obtain the cell temperature T1, the cabin temperature T2, and the cell power. Calculate the start time t for waking up the whole vehicle according to the start time of the reserved vehicle use, the cell temperature T1, the cabin temperature T2, and the cell power 唤醒 ;

[0008] Step S3: When reaching the start time t for waking up the whole vehicle 唤醒 Based on the cell temperature T1, the cabin temperature T2, and the cell power, select a control strategy, obtain electric energy from a charging pile, and perform power distribution among cell charging, cell preheating, and cabin temperature regulation to achieve the coupling among the three functions of cell charging, cell preheating, and cabin temperature regulation.

[0009] Preferably, in step 2, the specific method for calculating the start time for waking up the whole vehicle is as follows: Set a redundant time t 冗余 , and calculate the start time t for waking up the whole vehicle through the following formula 唤醒 ;

[0010] t 唤醒 = t - max(t 加热 ) - max(t 调温 ) - max(t 充电 ) - t 冗余

[0011] In the formula, t represents the travel time of the reserved vehicle use, max(t 加热 ) represents the maximum duration in the heating duration MAP table of the cell temperature T1 - heating duration t1; max(t 调温 ) represents the maximum duration in the temperature regulation duration Map table of the cabin temperature T2 - heating duration t2; max(t 充电 ) represents the maximum duration in the charging duration MAP table of the cell charging - charging duration t3.

[0012] Preferably, the method for selecting the power distribution strategy includes the following steps:

[0013] Step S31: According to the cell heating power characteristics, calibrate and obtain the Map table of cell heating power levels corresponding to different cell temperatures T1;

[0014] Step S32: According to the cabin heating power characteristics and the temperature difference △T2 between the set target temperature inside the cabin and the initial cabin temperature T2, calibrate and obtain the Map table of cabin heating power levels corresponding to different temperature differences △T2;

[0015] Step S33: Based on the Map table of cell heating power levels, the Map table of cabin heating power levels, and the cell power, considering the time difference △t between the travel time t and the current time, sort the energy distribution priorities of the three functions of cell charging, cell preheating, and cabin temperature regulation;

[0016] Step S34: Based on the sorting result of the energy distribution priority, allocate the power for the three functions to complete the function of scheduled heating.

[0017] Preferably, the specific methods for sorting the energy distribution priority and power allocation are as follows:

[0018] When the battery cell power ≤ 30%, prioritize charging, and set the energy distribution priority as: battery cell charging power > battery cell preheating power > cockpit temperature control power;

[0019] When 30% < battery cell power ≤ 80%, when the time difference △t > 30 min, prioritize charging, and set the energy distribution priority as: battery cell charging power > battery cell preheating power > cockpit temperature control power; when the time difference △t ≤ 30 min, prioritize cockpit temperature control, and set the energy distribution priority as: battery cell charging power > cockpit temperature control power > battery cell preheating power;

[0020] When the battery cell power > 80%, when the △t > 30 min, prioritize battery thermal insulation, and set the energy distribution priority as: battery cell charging power > battery cell preheating power > cockpit temperature control power; when the time difference △t ≤ 30 min, prioritize cockpit temperature control, and set the energy distribution priority as: battery cell charging power > cockpit temperature control power > battery cell heating power.

[0021] The present invention also provides a power battery thermal insulation control system based on user's scheduled travel, including a mobile terminal reservation module, a communication module, an in-vehicle reservation control module, an in-vehicle charging-preheating-temperature control module, and an energy control strategy selection module;

[0022] The mobile terminal reservation module is used to input reservation information, set the travel time t, and transmit it to the communication module;

[0023] The communication module is used to transmit the reservation information to the in-vehicle reservation control module;

[0024] The in-vehicle reservation control module is used to obtain the battery cell temperature T1, the cockpit temperature T2, and the battery cell power according to the reservation information, so as to calculate the start time t for waking up the whole vehicle 唤醒 , and wake up the in-vehicle charging-preheating-temperature control module;

[0025] The in-vehicle charging-preheating-temperature control module is used to convert the grid electric energy of the charging pile to complete the functions of battery charging, battery preheating, and cockpit temperature control;

[0026] The energy control strategy selection module is used to adjust the power distribution among various components according to the battery cell temperature T1, the cockpit temperature T2, the battery cell power, and the travel time.

[0027] Preferably, based on the cell heating power and the performance of the cell thermal insulation material, and in combination with the set battery heating threshold and the cell thermal insulation temperature difference requirement, the vehicle-mounted reservation control module obtains the heating duration t of the cell temperature T1 - heating duration t1 加热 MAP table of;

[0028] Based on the cabin temperature T2 and the cabin temperature adjustment power, and in combination with the set cabin temperature threshold, the temperature adjustment duration t of the cabin temperature T2 - heating duration t2 is obtained 调温 Map table of;

[0029] Based on the cell charging power, the charging duration t of the cell charging - charging duration t3 is obtained 充电 MAP table of;

[0030] Set the redundant time t 冗余 , calculate t 唤醒 = t - max(t 加热 ) - max(t 调温 ) - max(t 充电 ) - t 冗 surplus.

[0031] Preferably, the energy control strategy selection module calibrates and obtains the Map table of the cell heating power levels corresponding to different cell temperatures T1 according to the cell heating power characteristics;

[0032] According to the cabin heating power characteristics and the temperature difference △T2 between the set target temperature inside the cabin and the initial cabin temperature T2, calibrate and obtain the Map table of the cabin heating power levels corresponding to different temperature differences △T2;

[0033] Considering the differences in the time difference △t between the cell charging and the travel time t and the current time, sort the energy allocation priorities of the three functions of cell charging, cell preheating, and cabin temperature adjustment; when the cell power ≤ 30%, give priority to charging, and the energy allocation priority is set as: cell charging power > cell preheating power > cabin temperature adjustment power;

[0034] When 30% < cell power ≤ 80%, when the time difference △t > 30 min, give priority to charging, and the energy allocation priority is set as: cell charging power > cell preheating power > cabin temperature adjustment power; when the time difference △t ≤ 30 min, give priority to cabin temperature adjustment, and the energy allocation priority is set as: cell charging power > cabin temperature adjustment power > cell preheating power;

[0035] When the battery cell power > 80%, when △t > 30 min, battery thermal insulation is prioritized, and the energy distribution priority is set as: battery cell charging power > battery cell preheating power > cabin temperature control power; when the time difference △t ≤ 30 min, cabin temperature control is prioritized, and the energy distribution priority is set as: battery cell charging power > cabin temperature control power > battery cell heating power.

[0036] Through the above technical solution, the user can preheat the power battery, charge the battery, and control the cabin temperature according to needs. Through the existing charging process, the coupling among the three functions of battery cell charging, battery cell preheating, and cabin temperature control is realized. At the same time, the energy consumption of battery thermal insulation only comes from the charging pile and does not consume the electric energy of the power battery, alleviating the user's range anxiety; without adding a new thermal management controller, the battery cell temperature monitoring can be realized, and through the design of the control software, the single battery thermal insulation or the coupling of charging, remote air conditioning and other working conditions do not affect each other. While achieving the development purpose, the development cost is low, it is easy to iterate and upgrade in the later stage, and the function is convenient, which is suitable for popularization and application on various automobiles. Brief Description of the Drawings

[0037] Figure 1 It is a schematic diagram of the control flow of the present invention;

[0038] Figure 2 It is a schematic diagram of the single-scenario control of the present invention;

[0039] Figure 3 It is a schematic diagram of the coupling-scenario control of the present invention;

[0040] Figure 4 It is a Map table of the battery cell temperature power level in the embodiment of the present invention;

[0041] Figure 5 It is a Map table of the cabin temperature difference and power level in the embodiment of the present invention;

[0042] Figure 6 It is a MAP table of the battery cell temperature T1 - heating duration in the embodiment of the present invention. Detailed Description of the Preferred Embodiments

[0043] The following details the specific embodiments of the present invention. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present invention, and are not intended to limit the present invention.

[0044] The present invention provides a power battery thermal insulation control method based on the user's reserved travel, as Figure 1 shown, which is a flowchart of the control method of the present invention. Only the parts related to the present invention are described below.

[0045] Step S1: Obtain the reservation car - using instruction sent by the APP side, and determine the travel time t of the reservation car - using according to the reservation car - using instruction;

[0046] In the embodiment of the present invention, the user makes a reservation on the mobile APP side, sets the travel time and the setting of the battery heat preservation switch and saves it. The cloud will forward the corresponding reservation information to the in - vehicle communication unit TBOX and perform timing.

[0047] Step S2: Obtain the cell temperature T1, the cabin temperature T2 and the cell power, and calculate the start time t of waking up the whole vehicle according to the start time of the reservation car - using and the cell temperature T1, the cabin temperature T2 and the cell power 唤醒 ;

[0048] Calculate the start time t of waking up the whole vehicle through the following steps 唤醒 :

[0049] Set the redundant time t 冗余 , and calculate the start time t of waking up the whole vehicle through the following formula 唤醒 ;

[0050] t 唤醒 =t - max(t 加热 ) - max(t 调温 ) - max(t 充电 ) - t 冗余 .

[0051] max(t 加热 ) represents the heating duration t of the cell temperature T1 - heating duration t1 obtained based on the cell heating power, the performance of the cell heat preservation material, combined with the set battery heating threshold and the cell heat preservation temperature difference requirement 加热 of the MAP table, and the heating duration t 加热 Map is as Figure 6 shown, and the specific data is obtained by means of simulation / real - vehicle calibration;

[0052] max(t 调温 ) represents the temperature - adjusting duration t of the cabin temperature T2 - heating duration t2 obtained based on the cabin temperature T2 and the cabin temperature - adjusting power, combined with the set cabin temperature threshold 调温 of the Map table, and the specific obtaining method is the same as that of the MAP table of t 加热 ;

[0053] The MAP table of the charging duration t of the cell charging - charging duration t3 obtained based on the cell charging power, and the specific obtaining method is the same as that of the MAP table of t 充电 ; 加热 ;

[0054] The wake-up method in this embodiment is as follows: The in-vehicle communication unit TBOX sends an instruction to the Controller Area Network CAN line to wake up the vehicle controller VCU and all vehicle components. The vehicle controller VCU interacts with the battery management system BMS. When the cell temperature is lower than the threshold for battery heating at this time, the battery management system BMS sends a valid instruction for battery heating request to the vehicle controller VCU. At this time, the battery management system BMS and the on-board charger OBC perform instruction interaction, and the battery heat preservation flag bit is valid, and electrical energy is directly obtained from the charging pile end. At this time, the high-voltage relay of the battery pack is not closed, and the charging and discharging of the battery are controlled by the on-off of the high-voltage relay, so as to ensure that the energy consumption for battery heat preservation comes from the power grid. At the same time, through the interaction between the vehicle controller VCU and the electric vehicle communication controller EVCC, the state of the vehicle-side battery heat preservation is fed back to the user's mobile phone APP side.

[0055] If the cell temperature is higher than the threshold for battery heating at this time, it means that the temperature of the power battery is at an appropriate temperature and no additional heating is required. The battery management system BMS sends an invalid instruction for battery heating request to the VCU and feeds back this signal to the vehicle controller VCU. Through the interaction between the vehicle controller VCU and the electric vehicle communication controller EVCC, the information that the vehicle-side battery does not need heating is fed back to the user's mobile phone APP side. When battery heating is not required, the electrical energy obtained from the charging pile is automatically used for cell charging and cabin temperature adjustment to ensure the user's travel.

[0056] Step S3: When reaching the start time t for waking up the vehicle 唤醒 Based on the cell temperature T1, cabin temperature T2, and cell power, a control strategy is selected to obtain electrical energy from the charging pile and perform power distribution among cell charging, cell preheating, and cabin temperature adjustment to achieve the coupling among the three functions of cell charging, cell preheating, and cabin temperature adjustment.

[0057] As Figure 2 shown, it is a control schematic diagram in a single scenario. As Figure 3 shown, it is a control schematic diagram in a coupled scenario.

[0058] The energy management strategy for the coupling scenario is mainly described below. When scheduled charging / cockpit temperature adjustment / battery preheating are all enabled simultaneously, the energy consumption required for all three comes from the electrical energy of the charging pile. In this embodiment, a 32A AC charging pile is taken as an example, and the maximum power output by the on-board charger OBC is approximately 6.6kW; the maximum power of the commonly used power battery pack heater PackPTC and the air conditioner heater AirPTC can both reach 6 - 7kW. How to allocate the energy usage priority in the coupling scenario is an important strategy that needs to be considered for achieving the vehicle's function / performance goals. The idea of the control strategy is to set different energy usage priorities under four influencing factors: different initial cell temperatures T1, cockpit temperatures T2, cell charge, and travel time t. The key points of the control strategy are as follows:

[0059] According to the power characteristics of the installed battery pack heater PackPTC, the power level Map table corresponding to different cell temperatures T1 is calibrated respectively. The sample of the Map table is as Figure 4 shown.

[0060] According to the power characteristics of the installed air conditioner heater AirPTC and the temperature difference △T2 between the set cabin target temperature and the initial cockpit temperature T2, the power level Map table corresponding to different temperature differences △T2 is calibrated. The sample of the Map table is as Figure 5 shown.

[0061] Considering the differences in the cell charge SOC and the time difference △t between the travel time t and the current time, the energy allocation priorities for the three functions are sorted.

[0062] When SOC ≤ 30%, charging is prioritized. Energy allocation priority: DC / DC converter DCDC > battery pack heater PackPTC > air conditioner heater AirPTC > air conditioner compressor ECOMP, and the power limits of the drive motor control unit MCU and the external discharge V2L are 0kW;

[0063] When 30% < SOC ≤ 80%, when △t > 30min, charging is prioritized. Energy allocation priority: DC / DC converter DCDC > battery pack heater PackPTC > air conditioner heater AirPTC > air conditioner compressor ECOMP, and the power limits of MCU and V2L are 0kW; when △t ≤ 30min, cockpit temperature adjustment is prioritized to ensure the travel vision and comfort requirements. Energy allocation priority: DC / DC converter DCDC > air conditioner heater AirPTC > air conditioner compressor ECOMP > battery pack heater PackPTC, and the power limits of the drive motor control unit MCU and the external discharge V2L are 0kW;

[0064] When the state of charge (SOC) > 80%, when Δt > 30 min, battery thermal management is prioritized. Energy distribution priority: DC / DC converter DCDC > battery pack heater PackPTC > air conditioner heater AirPTC > air conditioner compressor ECOMP, and the power limits of the drive motor control unit MCU and vehicle-to-load (V2L) are 0 kW; when Δt ≤ 30 min, cabin temperature regulation is prioritized to ensure the requirements for travel vision and comfort. Energy distribution priority: DC / DC converter DCDC > air conditioner heater AirPTC > air conditioner compressor ECOMP > battery pack heater PackPTC, and the power limits of the drive motor control unit MCU and vehicle-to-load (V2L) are 0 kW;

[0065] The present invention also provides a power battery thermal management control system based on user-scheduled travel, including a mobile terminal reservation module, a communication module, an in-vehicle reservation control module, an in-vehicle charging-preheating-temperature regulation module, and an energy control strategy selection module;

[0066] The mobile terminal reservation module is used to input reservation information, set the travel time t, and transmit it to the communication module;

[0067] The communication module is used to transmit the reservation information to the in-vehicle reservation control module;

[0068] The in-vehicle reservation control module is used to obtain the cell temperature T1, cabin temperature T2, and cell charge according to the reservation information to calculate the start time t of waking up the whole vehicle 唤醒 , and wake up the in-vehicle charging-preheating-temperature regulation module;

[0069] The in-vehicle charging-preheating-temperature regulation module is used to convert the grid electric energy of the charging pile to complete the functions of battery charging, battery preheating, and cabin temperature regulation;

[0070] The energy control strategy selection module is used to adjust the power distribution among various components according to the cell temperature T1, cabin temperature T2, cell charge, and travel time.

[0071] The in-vehicle reservation control module, based on the cell heating power and the performance of the cell thermal insulation material, combines the set battery heating threshold and the cell thermal insulation temperature difference requirement to obtain the MAP table of the heating duration t of the cell temperature T1 - heating duration t1 加热 ;

[0072] Based on the cabin temperature T2 and the cabin temperature regulation power, combined with the set cabin temperature threshold, obtain the regulation duration t of the cabin temperature T2 - heating duration t2 调温 Map table;

[0073] Based on the cell charging power, obtain the charging duration t of the cell charging - charging duration t3 充电 MAP table;

[0074] Set the redundant time t 冗余 , and calculate t 唤醒 = t - max(t 加热 ) - max(t 调温 ) - max(t 充电 ) - t 冗 remainder.

[0075] The energy control strategy selection module calibrates the Map table of the cell heating power levels corresponding to different cell temperatures T1 according to the cell heating power characteristics;

[0076] According to the cabin heating power characteristics and the temperature difference △T2 between the set target cabin temperature and the initial cabin temperature T2, calibrate the Map table of the cabin heating power levels corresponding to different temperature differences △T2;

[0077] Considering the differences in the time difference △t between the cell charging and travel time t and the current time, sort the energy allocation priorities of the three functions of cell charging, cell preheating, and cabin temperature adjustment; when the cell power ≤ 30%, prioritize charging, and set the energy allocation priority as: cell charging power > cell preheating power > cabin temperature adjustment power;

[0078] When 30% < cell power ≤ 80%, when the time difference △t > 30 min, prioritize charging, and set the energy allocation priority as: cell charging power > cell preheating power > cabin temperature adjustment power; when the time difference △t ≤ 30 min, prioritize cabin temperature adjustment, and set the energy allocation priority as: cell charging power > cabin temperature adjustment power > cell preheating power;

[0079] When the cell power > 80%, when △t > 30 min, prioritize battery thermal insulation, and set the energy allocation priority as: cell charging power > cell preheating power > cabin temperature adjustment power; when the time difference △t ≤ 30 min, prioritize cabin temperature adjustment, and set the energy allocation priority as: cell charging power > cabin temperature adjustment power > cell heating power. The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept scope of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0080] In addition, it should be noted that, in the case of no contradiction, the various specific technical features described in the above specific embodiments can be combined in any suitable way. To avoid unnecessary repetition, the present invention does not separately describe various possible combination methods.

[0081] In addition, any combination can be made among various different embodiments of the present invention, as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. A power battery thermal management control method based on user reservation for travel, characterized in that: Step S1: Obtain the reservation vehicle use instruction sent by the APP side, and determine the travel time t of the reserved vehicle use according to the reservation vehicle use instruction; Step S2: Obtain the cell temperature T1, the cabin temperature T2, and the cell power. Calculate the start time t for waking up the entire vehicle based on the start time of the reserved vehicle use, the cell temperature T1, the cabin temperature T2, and the cell power 唤醒 ; Step S3: When the start time t for waking up the whole vehicle is reached 唤醒 Based on the cell temperature T1, the cabin temperature T2, and the cell power, select a control strategy, obtain electric energy from the charging pile, and perform power distribution among cell charging, cell preheating, and cabin temperature adjustment to achieve the coupling among the three functions of cell charging, cell preheating, and cabin temperature adjustment; The method for selecting the control strategy includes the following steps: Step S31: According to the cell heating power characteristics, calibrate the Map table of cell heating power levels corresponding to different cell temperatures T1; Step S32: According to the cabin heating power characteristics and the temperature difference △T2 between the set target cabin temperature and the initial cabin temperature T2, calibrate the Map table of cabin heating power levels corresponding to different temperature differences △T2; Step S33: Based on the cell heating power level Map table, the cabin heating power level Map table, and the cell power, considering the time difference △t between the travel time t and the current time, sort the energy distribution priorities of the three functions of cell charging, cell preheating, and cabin temperature adjustment; Step S34: Based on the sorting result of the energy distribution priorities, allocate the power for the three functions to complete the reserved heating function.

2. The battery thermal management control method for user reservation-based travel according to claim 1, wherein: In step S2, the specific method for calculating the start time of waking up the whole vehicle is as follows: set a redundant time t 冗余 , and calculate the start time t of waking up the whole vehicle through the following formula 唤醒 ; t 唤醒 = t - max(t 加热 ) - max(t 调温 ) - max(t 充电 ) - t 冗余 Wherein, t represents the travel time of the reserved vehicle, and max(t 加热 ) represents the maximum duration in the heating duration MAP table of the cell temperature T1 - heating duration t1; max(t 调温 ) represents the maximum duration in the temperature adjustment duration Map table of the cabin temperature T2 - heating duration t2; max(t 充电 ) represents the maximum duration in the charging duration MAP table of the cell charging - charging duration t3.

3. A power battery thermal insulation control method based on user reservation travel according to claim 1, characterized in that: The specific methods for sorting the energy distribution priorities and allocating the power are as follows: When the cell power ≤ 30%, prioritize charging, and set the energy distribution priority as: cell charging power > cell preheating power > cabin temperature adjustment power; When 30% < cell power ≤ 80%, when the time difference △t > 30 min, prioritize charging, and set the energy distribution priority as: cell charging power > cell preheating power > cabin temperature adjustment power; when the time difference △t ≤ 30 min, prioritize cabin temperature adjustment, and set the energy distribution priority as: cell charging power > cabin temperature adjustment power > cell preheating power; When the cell power > 80%, when △t > 30 min, prioritize battery thermal management, and set the energy distribution priority as: cell charging power > cell preheating power > cabin temperature adjustment power; when the time difference △t ≤ 30 min, prioritize cabin temperature adjustment, and set the energy distribution priority as: cell charging power > cabin temperature adjustment power > cell heating power.

4. A power battery thermal insulation control system based on user reservation for travel, characterized in that: It includes a mobile terminal reservation module, a communication module, an in-vehicle reservation control module, an in-vehicle charging - preheating - temperature adjustment module, and an energy control strategy selection module; The mobile terminal reservation module is used to input reservation information, set the travel time t, and transmit it to the communication module; The communication module is used to transmit the reservation information to the in-vehicle reservation control module; The in-vehicle reservation control module is used to obtain the cell temperature T1, the cabin temperature T2, and the cell power according to the reservation information, so as to calculate the start time t for waking up the entire vehicle 唤醒 , and wake up the in-vehicle charging-preheating-temperature adjustment module; The in-vehicle charging - preheating - temperature adjustment module is used to convert the grid electric energy of the charging pile to complete the functions of battery charging, battery preheating, and cabin temperature adjustment; The energy control strategy selection module is used to adjust the power distribution between components according to the cell temperature T1, the cabin temperature T2, the cell power, and the travel time; The energy control strategy selection module calibrates the Map table of cell heating power levels corresponding to different cell temperatures T1 according to the cell heating power characteristics; According to the cabin heating power characteristics and the temperature difference △T2 between the set target temperature inside the cabin and the initial cabin temperature T2, calibrate the Map table of cabin heating power gears corresponding to different temperature differences △T2; Considering the differences in the time difference △t between the battery cell charging and travel time t and the current time, sort the energy allocation priorities of the three functions of battery cell charging, battery cell preheating, and cabin temperature adjustment; when the battery cell power ≤ 30%, prioritize charging, and set the energy allocation priority as: battery cell charging power > battery cell preheating power > cabin temperature adjustment power; When 30% < battery cell power ≤ 80%, when the time difference △t > 30 min, prioritize charging, and set the energy allocation priority as: battery cell charging power > battery cell preheating power > cabin temperature adjustment power; when the time difference △t ≤ 30 min, prioritize cabin temperature adjustment, and set the energy allocation priority as: battery cell charging power > cabin temperature adjustment power > battery cell preheating power; When the battery cell power > 80%, when △t > 30 min, prioritize battery thermal insulation, and set the energy allocation priority as: battery cell charging power > battery cell preheating power > cabin temperature adjustment power; when the time difference △t ≤ 30 min, prioritize cabin temperature adjustment, and set the energy allocation priority as: battery cell charging power > cabin temperature adjustment power > battery cell heating power.

5. A power battery thermal insulation control system based on user reservation travel according to claim 4, characterized in that: The vehicle-mounted reservation control module obtains the heating duration t of the cell temperature T1 - heating duration t1 based on the cell heating power and the performance of the cell thermal insulation material, in combination with the set battery heating threshold and the cell thermal insulation temperature difference requirement. 加热 MAP table; Based on the cockpit temperature T2 and the cockpit temperature regulation power, and in combination with the set cockpit temperature threshold, the regulation duration t of the cockpit temperature T2 - heating duration t2 is obtained 调温 Map table; Based on the charging power of the battery cell, obtain the charging duration t of the battery cell charging - charging duration t3 充电 MAP table of; Set the redundant time t 冗余 , calculate t 唤醒 = t - max(t 加热 ) - max(t 调温 ) - max(t 充电 ) - t 冗 remainder.

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