Battery heating system and method of power transmission line monitoring energy storage module

Abstract

The invention belongs to the field of battery heating, and relates to a battery heating system and method for a power transmission line monitoring energy storage module, and the system comprises a mounting box body, a heating assembly, and a power taking assembly. A protective cover is arranged at the top end of the mounting box body, at least one battery is placed in the mounting box body, and a control assembly is arranged on the outer wall of the mounting box body; the heating assembly comprises a supporting frame mounted on the periphery of the inner wall of the mounting box body, containing cavities are formed in the periphery of the supporting frame, cotton plates are arranged in the containing cavities and detachably connected with the supporting frame, and resistance wires and temperature and humidity sensors are arranged on the surfaces, close to the battery, of the cotton plates; the control assembly comprises a controller, an early warning device and a wireless communicator which are connected in sequence. The controller is electrically connected with the resistance wire, the temperature and humidity sensor and the electricity taking assembly. Through the heating assembly and the temperature and humidity sensor, the problems that the performance of the battery is suddenly reduced and the service life of the battery is obviously shortened in a low-temperature environment are solved.

Description

Technical Field

[0001] The present invention relates to the field of battery heating, and specifically discloses a battery heating system and method for a transmission line monitoring energy storage module. Background Art

[0002] Lithium-ion batteries have been widely used in consumer electronics, new energy vehicles, and energy storage due to their high specific energy, long cycle life, wide operating temperature range, and environmental friendliness. Lithium-ion batteries are used in intelligent transmission line devices. In transmission line monitoring in some cold regions, energy storage modules are often used to ensure power supply. These modules include lithium-ion batteries. Traditional lithium-ion batteries typically operate at temperatures between -20°C and 55°C. When the operating temperature drops below -20°C, their performance drops dramatically. This means that when used in low-temperature environments, lithium-ion batteries experience lithium deposition and imbalanced lithium intercalation and deintercalation, leading to capacity degradation, reduced rate performance, and cycle performance, severely limiting their performance and lifespan. Therefore, low-temperature heating technology is a core technology in battery thermal management systems and is key to mitigating battery performance degradation in low-temperature environments. A system for heating lithium-ion batteries is urgently needed to maintain the temperature of the cells and ensure proper discharge. Summary of the Invention

[0003] The object of the present invention is to provide a battery heating system and method for a power transmission line monitoring energy storage module, so as to solve the problem that the battery performance drops sharply and the service life is significantly shortened in a low temperature environment.

[0004] The specific scheme of the present invention is as follows: A battery heating system for a power transmission line monitoring energy storage module is used to heat the battery in the monitoring energy storage module for monitoring the power transmission line, comprising: a mounting box, a heating component, and a power extraction component; A protective cover is provided on the top of the installation box body, the installation box body and the protective cover are detachably connected, at least one battery is placed inside the installation box body, and a control component is provided on the outer wall of the installation box body; The heating assembly includes a support frame installed around the inner wall of the installation box. The support frame is provided with a receiving cavity on all sides. A cotton board is provided in the receiving cavity. The cotton board is detachably connected to the support frame. A resistance wire and a temperature and humidity sensor are provided near the battery surface of the cotton board. The resistance wire is arranged in an S shape. The control component includes a controller, an early warning device and a wireless communicator connected in sequence. The controller is electrically connected to the resistance wire, the temperature and humidity sensor and the power taking component respectively. The power taking component is used to provide electrical energy.

[0005] In some embodiments, the heating assembly further includes a heat preservation plate, which is disposed on a surface of the cotton board away from the battery.

[0006] In some embodiments, an installation component is also included, which includes installation slots symmetrically arranged around the top of the support frame. Both ends of the cotton board are provided with installation strips that cooperate with the installation slots. The cotton board is fixedly connected to the support frame by plugging the installation strips into the installation slots.

[0007] In some embodiments, at least one heat dissipation hole is opened on the top of the protective cover, a rotatable adjustment disk is provided above the heat dissipation hole, the adjustment disk is provided with a knob and a through hole matching the heat dissipation hole, and the knob is electrically connected to the controller.

[0008] In some embodiments, hooks are provided on both sides of the protective cover, and locks that cooperate with the hooks are provided on both sides of the installation box body. The installation box body and the protective cover are fixedly connected by the locks and the hooks.

[0009] In some embodiments, a sealing ring is provided around the bottom edge of the protective cover, and a groove that cooperates with the sealing ring is provided around the top edge of the installation box body. The sealing ring and the groove are snap-fitted together to seal the protective cover and the installation box body.

[0010] In some embodiments, the power supply assembly includes an electromagnetic core, a power supply secondary winding and an AD / DC module. The transmission line passes through the electromagnetic core, the power supply secondary winding is wound on the electromagnetic core, the two ends of the power supply secondary winding are respectively connected to the input end of the AD / DC module, and the output end of the AD / DC module is electrically connected to the controller.

[0011] The present invention also relates to a battery heating method for a transmission line monitoring energy storage module, which is used in the above-mentioned battery heating system for the transmission line monitoring energy storage module, comprising the following steps: S1. Determine whether the battery surface temperature is less than a first threshold value based on the battery surface temperature detected in real time by the temperature and humidity sensor. If so, activate the resistance wire for heating; if not, deactivate the resistance wire and do not heat the battery. S2. Determine whether the battery surface temperature is greater than a second threshold. If so, activate the knob to rotate the mounting plate so that the through holes correspond to the heat dissipation holes for heat dissipation. If not, deactivate the resistance wire, discontinue heating, and deactivate the knob to dissipate heat. The first threshold is smaller than the second threshold.

[0012] In some embodiments, a dehumidification step is further included, the dehumidification step comprising: According to the air humidity detected in real time by the temperature and humidity sensor, it is judged whether the air humidity in the installation box is greater than the third threshold. If the judgment result is yes, the resistance wire is started for heating and dehumidification; if the judgment result is no, the resistance wire is not started and dehumidification is not performed.

[0013] In some embodiments, an early warning step is further included, and the early warning step includes: Based on the battery surface temperature detected in real time within a predetermined time period, it is judged whether the battery surface temperature is zero, and if the result is yes, the heating system is immediately turned off and a failure warning signal is sent to the manager for failure warning; If the result is no, no failure warning is performed, and according to the current time battery surface temperature and the previous time battery surface temperature detected in real time, it is judged whether the difference between the current time battery surface temperature and the previous time battery surface temperature is greater than a fourth threshold value, if the result is yes, the battery heating system is immediately turned off, and a temperature abnormality signal is sent to the manager for temperature abnormality warning; if the result is no, no temperature abnormality warning is performed.

[0014] Compared with the prior art, the present application has the following advantages and beneficial effects: 1、The battery surface temperature and air humidity detected in real time by the temperature and humidity sensor are used to start the heating of the resistance wire, so as to realize automatic heating and automatic dehumidification, so that the battery surface temperature and air humidity meet the working requirements, ensure the normal use of the battery in a low temperature environment, do not affect the performance and service life of the battery, and realize the automatic keeping of the battery in a normal working mode; the rotation of the knob adjustment disc is used to make the heat dissipation hole correspond to the through hole according to the battery surface temperature, so as to realize automatic heat dissipation and avoid the influence of the performance and service life of the battery due to the too high temperature; the real-time warning of the warning device is used to make the manager find and solve the problem in time; the heat preservation plate is used to play a heat preservation effect and prevent the rapid heat loss, so as to save energy. BRIEF DESCRIPTION OF DRAWINGS Figure 1 It is a structure schematic view of the battery heating system of the power transmission line monitoring energy storage module in the embodiment of the present application.

[0015] Figure 2 It is a structure schematic view of the heating assembly in the embodiment of the present application.

[0016] Figure 3 It is a structure schematic view of the adjustment disc installation structure in the embodiment of the present application.

[0017] Figure 4 It is a structure schematic view of the inside structure of the installation box in the embodiment of the present application.

[0018] Figure 5 It is a flow chart of the battery heating method of the power transmission line monitoring energy storage module in the embodiment of the present application.

[0019] Figure markings: 1-installation box, 2-protective cover, 3-battery, 4-heating component, 41-support frame, 42-accommodating cavity, 43-cotton board, 44-resistance wire, 45-insulation board, 46-temperature and humidity sensor, 5-installation component, 51-installation slot, 52-installation bar, 6-heat dissipation hole, 7-adjustment dial, 8-through hole, 9-knob, 10-hook, 11-lock, 12-sealing ring, 13-groove, 14-control component, 15-electromagnetic core, 16-power secondary winding, 17-AD / DC module, 18-transmission line. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] A battery heating system for a power transmission line monitoring energy storage module is used to heat the battery 3 in the monitoring energy storage module for monitoring the power transmission line. Figure 1 and Figure 4 As shown, it includes: an installation box body 1, a heating component 4 and a power supply component; A protective cover 2 is provided on the top of the installation box body, and the installation box body 1 is detachably connected to the protective cover 2. At least one battery 3 is placed inside the installation box body, and the number of batteries can be 4. A control component 14 and a power jack are provided on the outer wall of the installation box body. The battery 3 is connected to the monitoring device through the power jack, which facilitates the battery 3 to provide power to the monitoring device.

[0022] like Figure 2 As shown, the heating assembly 4 includes a support frame 41 installed around the inner wall of the installation box, and a receiving cavity 42 is opened on all sides of the support frame. A cotton board 43 is provided in the receiving cavity. The cotton board 43 can be a hard cotton board. The cotton board 43 is detachably connected to the support frame 41. A resistance wire 44 and a temperature and humidity sensor 46 are provided on the cotton board near the battery surface. The resistance wire 44 is arranged in an S shape. The control component 14 includes a controller, an early warning device and a wireless communicator connected in sequence. The controller is electrically connected to the resistance wire 44, the temperature and humidity sensor 46 and the power supply component respectively; the power supply component is used to provide electrical energy to the entire battery heating system; the early warning device is used to send early warning signals to management personnel for real-time early warning; the controller is used to make heating judgments, heat dissipation judgments, and early warning judgments based on the battery surface temperature detected by the temperature and humidity sensor 46, and to make dehumidification judgments based on the detected air humidity; the wireless communicator is used to send various data collected and processed by the controller to the background computer for storage, so that management personnel can view and trace the data.

[0023] According to the battery surface temperature and air humidity detected in real time by the temperature and humidity sensor 46, heating is performed by starting the resistance wire 44 to realize automatic heating and automatic dehumidification, so that the battery surface temperature and air humidity meet the working requirements, ensuring the normal use of the battery 3 in a low temperature environment without affecting the performance and service life of the battery, and realizing that the battery 3 automatically remains in the normal working mode, thereby solving the problem of the battery 3's rapid performance degradation and significantly shortened service life in a low temperature environment; real-time warning is carried out through the early warning device, so that management personnel can discover and deal with problems in time.

[0024] In some embodiments, the heating assembly 4 further includes a heat preservation plate 45 , which is disposed on the cotton board away from the battery surface.

[0025] The heat insulation board 45 has a heat preservation effect, prevents the heat from being lost too quickly, and saves energy.

[0026] In some embodiments, an installation component 5 is also included, which includes installation grooves 51 symmetrically arranged around the top of the support frame. Both ends of the cotton board are provided with installation strips 52 that cooperate with the installation grooves. The installation strips 52 are plugged into the installation grooves 51 to fix the cotton board 43 to the support frame 41.

[0027] By sliding the mounting strip 52 into the mounting groove, the cotton board 43 is fixed inside the support frame.

[0028] In some embodiments, as Figure 3 As shown, at least one heat dissipation hole 6 is provided at the top of the protective cover, a rotatable adjustment disk 7 is provided above the heat dissipation hole, a knob 9 and a through hole 8 matching the heat dissipation hole are provided on the adjustment disk, and the knob 9 is electrically connected to the controller.

[0029] For example, four evenly distributed heat dissipation holes 6 are opened along the circumference of the top center of the protective cover. The heat dissipation holes 6 are trapezoidal, with their upper bottom side, i.e., the short side, close to the center, and their lower bottom side, i.e., the long side, away from the center, and the lower bottom side is arc-shaped; the knob 9 is set at the center of the adjusting disk and connected to the top center of the protective cover. The adjusting disk 7 can be rotated circumferentially along the knob 9 through the knob 9. The adjusting disk is provided with four through holes 8 evenly distributed along the circumference of the knob, and the through holes 8 correspond one-to-one to the heat dissipation holes 6. The knob 9 is driven by the controller to rotate and the adjusting disk 7 is driven to rotate so that the through holes 8 correspond one-to-one to the heat dissipation holes 6. The heat inside the installation box is discharged through the heat dissipation holes 6 and the through holes 8, so that the surface temperature of the battery is reduced to achieve heat dissipation.

[0030] The adjustment disk 7 is rotated by the knob 9 so that the heat dissipation holes correspond to the through holes, thereby achieving automatic heat dissipation and preventing the performance and service life of the battery 3 from being affected by excessive temperature.

[0031] In some embodiments, the protective cover is provided with hooks 10 on both sides, and the installation box body is provided with buckles 11 matched with the hooks on both sides, and the installation box body 1 and the protective cover 2 are fixedly connected through the buckling of the buckles 11 and the hooks 10.

[0032] In some embodiments, the protective cover is provided with a sealing ring 12 around the bottom end edge, and the installation box body is provided with a groove 13 matched with the sealing ring around the top end edge, and the protective cover 2 and the installation box body 1 are sealingly connected through the clamping of the sealing ring 12 and the groove 13.

[0033] In some embodiments, the power taking assembly includes a power taking magnetic core 15, a power taking secondary winding 16, and an AD / DC module 17, the power transmission line 18 passes through the power taking magnetic core 15, the power taking secondary winding 16 is wound on the power taking magnetic core, the two ends of the power taking secondary winding are respectively connected with the input end of the AD / DC module, and the output end of the AD / DC module is electrically connected with the controller.

[0034] When current passes through the power transmission line, magnetic flux is generated, most of which flows through the power taking magnetic core, and according to the principle of electromagnetic induction, the magnetic flux cuts the power taking secondary winding 16, AC voltage is induced at both ends of the power taking secondary winding, thereby generating induced AC current, and the induced current is converted into DC current by the AD / DC module 17 for use in the entire battery heating system.

[0035] A kind of installation and use of battery heating system of power transmission line monitoring energy storage module: First, install the insulation board 45 around the inner wall of the installation box body, then install the resistance wire 44 and the temperature and humidity sensor 46 on the cotton board, the resistance wire 44 and the temperature and humidity sensor 46 are respectively connected with the controller, then the installation strip 52 at both ends of the cotton board is inserted into the installation slot at the top end of the support frame to fixedly connect the cotton board and the support frame, then the battery 3 is placed inside the installation box body, then the protective cover 2 is covered on the installation box body, the protective cover 2 and the installation box body 1 are sealingly connected through the clamping of the sealing ring 12 and the groove 13, and the installation box body 1 and the protective cover 2 are fixedly connected through the buckling of the buckle 11 on the installation box body and the hook 10 on the protective cover.

[0036] Then, the power transmission line 18 passes through the power taking magnetic core 15, the power taking secondary winding 16 is wound on the power taking magnetic core, the two ends of the power taking secondary winding are respectively connected with the input end of the AD / DC module, and the output end of the AD / DC module is electrically connected with the controller; when current passes through the power transmission line, magnetic flux is generated, the magnetic flux cuts the power taking secondary winding 16, AC voltage is induced at both ends of the power taking secondary winding, thereby generating induced AC current, and the induced current is converted into DC current by the AD / DC module 17 for use in the entire battery heating system, realizing passive power taking.

[0037] The temperature and humidity sensor 46 detects the temperature of the battery surface and the air humidity inside the installation box in real time, obtains the battery surface temperature and air humidity, and transmits the battery surface temperature and air humidity to the controller. The controller determines whether heating or heat dissipation is required based on the battery surface temperature and air humidity. If heating is required, the controller starts the resistance wire 44 for heating control. If heat dissipation is required, the controller starts the knob 9 and rotates the adjustment disk 7 for heat dissipation control.

[0038] The controller determines whether the battery surface temperature is zero based on the real-time detection of the battery surface temperature within a predetermined time period. If the judgment result is yes, it indicates that the temperature and humidity sensor 46 has failed, and the controller immediately shuts down the heating system and sends a failure warning signal to the management personnel through the early warning device for warning; if the judgment result is no, it indicates that the temperature and humidity sensor 46 is valid, and no failure warning is issued. Based on the real-time detection of the battery surface temperature at the current moment and the battery surface temperature at the previous moment, the controller determines whether the difference between the current battery surface temperature and the previous battery surface temperature is greater than the fourth threshold value. If the judgment result is yes, the battery heating system is immediately shut down and a temperature abnormality warning signal is sent to the management personnel for temperature abnormality warning; if the judgment result is no, no temperature abnormality warning is issued.

[0039] Various data collected and processed by the controller are sent to the background computer for storage via a wireless communicator.

[0040] The present invention also relates to a battery heating method for a power transmission line monitoring energy storage module, which is used in the above-mentioned battery heating system for a power transmission line monitoring energy storage module, such as Figure 5 As shown, the following steps are included: S1. Heating the battery according to the real-time detection of the battery surface temperature by the temperature and humidity sensor; Based on the battery surface temperature detected in real time by the temperature and humidity sensor, it is determined whether the battery surface temperature is less than a first threshold value. If the determination result is yes, it indicates that the battery surface temperature is too low to operate normally, which will affect the performance and service life of the battery, and the resistance wire 44 is activated for heating; if the determination result is no, it indicates that the battery surface temperature is not low, and the resistance wire 44 is not activated for heating; S2, dissipating heat based on the battery surface temperature detected in real time by the temperature and humidity sensor; After determining that the battery surface temperature does not need to be heated, it is further determined whether the battery surface temperature is greater than a second threshold. If the judgment result is yes, it means that the battery surface temperature is high, and a high temperature will affect the performance and service life of the battery, then the knob 9 is started to rotate the mounting plate so that the through holes correspond to the heat dissipation holes for heat dissipation; if the judgment result is no, it means that the battery surface temperature is not high, then the resistance wire 44 is not started and no heating is performed, and the knob 9 is not started and no heat is dissipated; The first threshold value is smaller than the second threshold value. The first threshold value may be -20°C, and the second threshold value may be 55°C.

[0041] S3, dehumidifying according to the air humidity detected in real time by the temperature and humidity sensor; Based on the real-time air humidity detected by the temperature and humidity sensor, it is determined whether the air humidity inside the installation box is greater than a third threshold. If the determination result is yes, indicating that the air humidity inside the installation box is high, which will be detrimental to battery operation and affect battery performance and service life, the resistor 44 is activated to heat and dehumidify. If the determination result is no, indicating that the air humidity inside the installation box is not high, the resistor 44 is not activated and dehumidification is not performed. The third threshold can be 50% RH, i.e., the relative humidity of the air is 50%.

[0042] S4. Issue an early warning based on the battery surface temperature detected in real time by the temperature and humidity sensor within a predetermined time period.

[0043] Based on the real-time battery surface temperature detected within a predetermined time period, it is determined whether the battery surface temperature is zero. If the determination result is yes, it indicates that the temperature and humidity sensor 46 has failed. If the temperature and humidity sensor does not detect the battery surface temperature within the predetermined time period, the heating system is immediately shut down and a failure warning signal is sent to the management personnel for failure warning; If the judgment result is negative, indicating that the temperature and humidity sensor is effective and can detect the battery surface temperature within the predetermined time period, no failure warning is issued. Based on the real-time detected battery surface temperature at the current moment and the battery surface temperature at the previous moment, it is determined whether the difference between the current battery surface temperature and the battery surface temperature at the previous moment is greater than a fourth threshold. If the judgment result is positive, indicating a sudden temperature change and an abnormal battery surface temperature, the battery heating system is immediately shut down and a temperature abnormality warning signal is sent to the management personnel to issue a temperature abnormality warning. If the judgment result is negative, no temperature abnormality warning is issued. The fourth threshold value may be 5°C.

[0044] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A battery heating system for a power transmission line monitoring energy storage module, used to heat the battery in the monitoring energy storage module for monitoring the power transmission line, characterized in that: include: Install the box body, heating component and power supply component; A protective cover is provided on the top of the installation box body, and the installation box body and the protective cover are detachably connected. At least one battery is placed inside the installation box body, and a control component is provided on the outer wall of the installation box body; The heating assembly includes a support frame installed around the inner wall of the installation box, and the support frame is provided with a receiving cavity on all sides. A cotton board is provided in the receiving cavity, and the cotton board is detachably connected to the support frame. A resistance wire and a temperature and humidity sensor are provided on the cotton board near the battery surface, and the resistance wire is arranged in an S shape; The control component includes a controller, an early warning device and a wireless communicator connected in sequence. The controller is electrically connected to the resistance wire, the temperature and humidity sensor and the power supply component respectively. The power supply component is used to provide electrical energy.

2. A battery heating system for a power transmission line monitoring energy storage module according to claim 1, characterized in that: The heating assembly further comprises a heat preservation plate, which is arranged on a surface of the cotton board away from the battery.

3. The battery heating system for a power transmission line monitoring energy storage module according to claim 1, characterized in that: It also includes an installation component, which includes installation grooves symmetrically arranged around the top of the support frame. Both ends of the cotton board are provided with installation strips that cooperate with the installation grooves. The cotton board is fixedly connected to the support frame by plugging the installation strips into the installation grooves.

4. The battery heating system for a power transmission line monitoring energy storage module according to claim 1, characterized in that: At least one heat dissipation hole is provided on the top of the protective cover, a rotatable adjustment disk is provided above the heat dissipation hole, a knob and a through hole matching the heat dissipation hole are provided on the adjustment disk, and the knob is electrically connected to the controller.

5. The battery heating system for a power transmission line monitoring energy storage module according to claim 1, characterized in that: Hooks are provided on both sides of the protective cover, and locks that cooperate with the hooks are provided on both sides of the installation box body. The installation box body and the protective cover are fixedly connected by buckling the locks with the hooks.

6. The battery heating system for a power transmission line monitoring energy storage module according to claim 1, characterized in that: A sealing ring is provided around the bottom edge of the protective cover, and a groove cooperating with the sealing ring is provided around the top edge of the installation box body. The sealing ring and the groove are engaged with each other to seal the protective cover and the installation box body.

7. The battery heating system for a power transmission line monitoring energy storage module according to claim 1, characterized in that: The power-taking component includes an electromagnetic core, a power-taking secondary winding and an AD / DC module. The transmission line passes through the electromagnetic core. The power-taking secondary winding is wound on the electromagnetic core. The two ends of the power-taking secondary winding are respectively connected to the input end of the AD / DC module, and the output end of the AD / DC module is electrically connected to the controller.

8. A battery heating method for monitoring an energy storage module in a transmission line, characterized in that: A battery heating system for a power transmission line monitoring energy storage module according to any one of claims 1 to 7, comprising the following steps: S1. Determine whether the battery surface temperature is less than a first threshold value based on the battery surface temperature detected in real time by the temperature and humidity sensor. If so, activate the resistance wire for heating; if not, deactivate the resistance wire and do not heat the battery. S2. Determine whether the battery surface temperature is greater than a second threshold. If so, activate the knob to rotate the mounting plate so that the through holes correspond to the heat dissipation holes for heat dissipation. If not, deactivate the resistance wire, discontinue heating, and deactivate the knob to dissipate heat. The first threshold is smaller than the second threshold.

9. A battery heating method for a power transmission line monitoring energy storage module according to claim 8, characterized in that: The dehumidification step further comprises: According to the air humidity detected in real time by the temperature and humidity sensor, it is judged whether the air humidity in the installation box is greater than the third threshold. If the judgment result is yes, the resistance wire is started for heating and dehumidification; if the judgment result is no, the resistance wire is not started and dehumidification is not performed.

10. A battery heating method for a power transmission line monitoring energy storage module according to claim 9, characterized in that: The invention also includes an early warning step, which includes: Based on the real-time detection of the battery surface temperature within a predetermined time period, determine whether the battery surface temperature is zero. If the judgment result is yes, immediately shut down the heating system and send a failure warning signal to the management personnel for failure warning; If the judgment result is no, no failure warning will be issued, and based on the real-time detection of the battery surface temperature at the current moment and the battery surface temperature at the previous moment, it will be judged whether the difference between the current battery surface temperature and the battery surface temperature at the previous moment is greater than the fourth threshold. If the judgment result is yes, the battery heating system will be immediately shut down, and a temperature abnormality signal will be sent to the management personnel to issue a temperature abnormality warning; if the judgment result is no, no temperature abnormality warning will be issued.

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