Battery heat preservation system, control method of battery heat preservation system and vehicle

Abstract

The invention provides a battery heat preservation system, a control method of the battery heat preservation system and a vehicle. The battery heat preservation system comprises a heat preservation body, the heat preservation body is provided with a containing cavity, the containing cavity is used for containing a battery, a heat preservation cavity is formed in the cavity wall of the containing cavity, the heat preservation cavity is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both communicated with the outside; the liquid storage device is provided with a liquid inlet pipeline and a liquid outlet pipeline, a vacuum water pump is arranged on the liquid inlet pipeline, the liquid inlet pipeline is selectively communicated with the liquid outlet, and the liquid outlet pipeline is selectively communicated with the liquid inlet; the valve assembly comprises a liquid inlet valve and a liquid outlet valve, the liquid inlet valve has a first opening state for opening the liquid inlet and a first closing state for closing the liquid inlet, and the liquid outlet valve has a second opening state for opening the liquid outlet and a second closing state for closing the liquid outlet. According to the scheme, the problem that a battery heat preservation system in the prior art is not beneficial to battery heat dissipation is solved.

Description

Technical Field

[0001] This invention relates to the field of battery protection technology, and more specifically, to a battery insulation system, a control method for the battery insulation system, and a vehicle. Background Technology

[0002] The domestic new energy vehicle market is experiencing rapid growth, but the penetration rate of electric vehicles in northern regions remains low. The cold climate in the north leads to a significant reduction in battery range in low-temperature environments. Improving the low-temperature range of new energy vehicles is a major challenge for their development. Current mainstream solutions to enhance battery insulation use low-thermal-conductivity materials such as aerogel, foam, and glass wool. However, these solutions have limited heat insulation capabilities, and when the battery needs to dissipate heat, the insulation materials can actually hinder heat dissipation, negatively impacting battery performance.

[0003] There is currently no effective solution to the aforementioned technical problems. Summary of the Invention

[0004] The main objective of this invention is to provide a battery insulation system, a control method for the battery insulation system, and a vehicle, so as to solve the problem that the existing battery insulation system is not conducive to battery heat dissipation.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery insulation system is provided, comprising: an insulation body having a receiving cavity for accommodating a battery, the receiving cavity having an insulation chamber formed within its wall, the insulation chamber having an inlet and an outlet, both of which are connected to the outside; a liquid storage device having an inlet pipe and an outlet pipe, wherein a vacuum water pump is provided on the inlet pipe, the inlet pipe is selectively connected to the outlet pipe, and the outlet pipe is selectively connected to the inlet pipe; and a valve assembly including an inlet valve and an outlet valve, wherein the inlet valve has a first open state with the inlet open and a first closed state with the inlet closed, and the outlet valve has a second open state with the outlet open and a second closed state with the outlet closed.

[0006] Furthermore, the valve assembly also includes: a first control valve, the first interface of which is connected to the liquid inlet, the second interface of which is connected to the water inlet pipe of the vehicle cooling system, and the third interface of which is connected to the liquid outlet pipe, wherein the liquid inlet can be selectively connected to either the liquid outlet pipe or the vehicle cooling system via the first control valve; and a second control valve, the first interface of which is connected to the liquid outlet, the second interface of which is connected to the water outlet pipe of the vehicle cooling system, and the third interface of which is connected to the liquid inlet pipe, wherein the liquid outlet can be selectively connected to either the liquid inlet pipe or the vehicle cooling system via the second control valve.

[0007] Furthermore, the battery insulation system has a vacuum mode. When the battery insulation system is in vacuum mode, the inlet valve is in the first closed state, the outlet valve is in the second open state, the inlet pipe is connected to the outlet, and the vacuum water pump is in operation to draw the coolant in the insulation cavity into the storage device.

[0008] Furthermore, the battery insulation system has a coolant reflux mode. When the battery insulation system is in coolant reflux mode, the inlet valve is in the first open state, the outlet valve is in the second closed state, and the outlet pipe is connected to the inlet to allow the coolant in the storage device to reflux back into the insulation cavity.

[0009] Furthermore, the battery insulation system has a heat dissipation mode. When the battery insulation system is in heat dissipation mode, the inlet valve is in the first open state, the outlet valve is in the second open state, the inlet port is connected to the water inlet pipe of the vehicle cooling system, and the outlet port is connected to the water outlet pipe of the vehicle cooling system.

[0010] According to another aspect of the present invention, a control method for a battery insulation system is provided. The method is used to control the aforementioned battery insulation system and includes the following steps: in response to the vehicle being powered off, determining whether the vehicle battery meets a first insulation condition based on the battery temperature T0 of the vehicle battery and the ambient temperature T1 of the external environment of the vehicle; in response to the vehicle battery meeting the first insulation condition and the battery insulation system not being in insulation mode, determining the required operating mode of the battery insulation system based on user demand information, wherein the user demand information is used to characterize the user's operating requirements for the battery insulation system; in response to the required operating mode being insulation mode, controlling the battery insulation system to enter a vacuuming mode to perform vacuuming work on the insulation chamber; in response to the completion of the vacuuming work, controlling the battery insulation system to enter the insulation mode.

[0011] Furthermore, the method also includes: in response to the battery insulation system being in insulation mode and the vehicle battery meeting the first heating condition, generating a first reminder message and a second reminder message, the first reminder message being used to remind the user to confirm whether to turn on the heating, and the second reminder message being used to remind the user to input the expected travel time; in response to the user confirming that the heating has been turned on, controlling the battery heating system to enter the heating mode; in response to the user inputting the expected travel time, controlling the battery heating system to enter the heating mode at a preset heating time, wherein the preset heating time is before the expected travel time; in response to the battery heating system being in the heating mode and the vehicle battery meeting the second insulation condition, controlling the battery heating system to stop heating, and controlling the battery insulation system to maintain the insulation mode.

[0012] Furthermore, the method also includes: in response to the vehicle being powered on, determining whether the vehicle battery meets the third insulation condition based on the battery temperature T0 of the vehicle battery; in response to the vehicle battery meeting the third insulation condition and the battery insulation system not being in insulation mode, controlling the battery insulation system to enter the vacuuming mode to perform vacuuming work on the insulation chamber; in response to the completion of the vacuuming work, controlling the battery insulation system to enter the insulation mode.

[0013] Furthermore, the method also includes: in response to the battery insulation system being in insulation mode, controlling the battery heating system to enter heating mode; in response to the battery heating system being in heating mode and the vehicle battery meeting preset reflux conditions, controlling the battery heating system to stop heating and controlling the battery insulation system to enter coolant reflux mode to perform coolant reflux work on the insulation cavity; in response to the coolant reflux work being completed and the vehicle battery meeting preset heat dissipation conditions, controlling the battery insulation system to enter heat dissipation mode.

[0014] According to another aspect of the present invention, a vehicle is provided having a battery insulation system, which is the battery insulation system described above.

[0015] By applying the technical solution of this invention, specifically the technical solution of this embodiment, the battery insulation system can achieve effective insulation and heat dissipation of the battery under different environments by dynamically adjusting the medium within the insulation cavity. The battery insulation system can transfer the coolant from the insulation cavity to the storage device using a vacuum water pump, and then close the inlet and outlet valves to create a relative vacuum environment. This significantly reduces the thermal conductivity of the insulation cavity, effectively isolating the battery temperature from the influence of the external low-temperature environment, thereby solving the problem that existing battery insulation systems cannot effectively insulate and maintain heat in cold environments. When the battery requires heat dissipation, opening the inlet and outlet valves allows the coolant to flow back from the storage device to the insulation cavity. The flow of the coolant carries away the heat generated by the battery, solving the technical problem that the insulation structure becomes an obstacle when heat dissipation is needed. The technical solution of this embodiment utilizes the synergistic effect of the insulation cavity, liquid storage device and valve assembly to realize the rapid switching of the battery insulation system between different working modes. It can not only effectively maintain the battery temperature in cold environments and avoid the impact of low temperature on battery performance, but also respond quickly when the battery needs heat dissipation, thus achieving a dynamic balance between battery insulation and heat dissipation needs and solving the problem that the battery insulation system in the prior art is not conducive to battery heat dissipation. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1A schematic diagram of an embodiment of the battery insulation system according to the present invention is shown;

[0018] Figure 2 A schematic diagram of an embodiment of the battery insulation system according to the present invention is shown;

[0019] Figure 3 A schematic diagram of an embodiment of the battery insulation system according to the present invention in vacuum mode is shown;

[0020] Figure 4 A schematic diagram illustrating an embodiment of the battery insulation system according to the present invention in insulation mode is shown.

[0021] Figure 5 A schematic diagram of an embodiment of the battery insulation system according to the present invention in coolant reflux mode is shown;

[0022] Figure 6 A schematic diagram illustrating an embodiment of the battery insulation system according to the present invention in heat dissipation mode is shown.

[0023] Figure 7 A schematic diagram of the control principle of an embodiment of the battery insulation system according to the present invention is shown;

[0024] Figure 8 A flowchart illustrating a first embodiment of the control method for a battery insulation system according to the present invention is shown.

[0025] Figure 9 A flowchart illustrating a second embodiment of the control method for a battery insulation system according to the present invention is shown.

[0026] Figure 10 A flowchart illustrating a third embodiment of the control method for a battery insulation system according to the present invention is shown.

[0027] The above figures include the following reference numerals:

[0028] 11. Battery housing;

[0029] 21. Battery;

[0030] 31. Insulation body; 311. Receiving cavity; 312. Insulation chamber; 313. Liquid inlet; 314. Liquid outlet;

[0031] 40. Liquid storage device; 410. Liquid inlet pipe; 411. Vacuum water pump; 420. Liquid outlet pipe; 430. Vent plug;

[0032] 50. Valve assembly; 510. Inlet valve; 520. Outlet valve; 530. First control valve; 540. Second control valve;

[0033] 60. Vehicle cooling system; 610. Inlet water pipe; 620. Outlet water pipe;

[0034] 710. Liquid level sensor; 720. External temperature sensor; 730. Internal pressure sensor; 740. External pressure sensor;

[0035] 810. Vehicle controller; 820. Vacuum power battery insulation system controller; 830. T-BOX; 840. BMS battery management system; 850. IVI entertainment host; 860. Thermal management system; 870. CAN bus. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0039] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0040] Combination Figures 1 to 7 As shown, according to a specific embodiment of this application, a battery insulation system is provided.

[0041] The battery insulation system includes an insulation body 31, a liquid storage device 40, and a valve assembly 50. The insulation body 31 has a receiving cavity 311 for accommodating the battery 21. An insulation cavity 312 is formed within the cavity wall of the receiving cavity 311. The insulation cavity 312 has a liquid inlet 313 and a liquid outlet 314, both of which are connected to the outside. The liquid storage device 40 has an inlet pipe 410 and an outlet pipe 420. A vacuum valve is installed on the inlet pipe 410. The water pump 411 has an inlet pipe 410 that is optionally connected to an outlet 314, and an outlet pipe 420 that is optionally connected to an inlet 313. The valve assembly 50 includes an inlet valve 510 and an outlet valve 520. The inlet valve 510 has a first open state with the inlet 313 open and a first closed state with the inlet 313 closed. The outlet valve 520 has a second open state with the outlet 314 open and a second closed state with the outlet 314 closed.

[0042] By applying the technical solution of this embodiment, the battery insulation system can effectively insulate and dissipate heat from the battery under different environments by dynamically adjusting the medium within the insulation cavity 312. The battery insulation system can transfer the coolant from the insulation cavity 312 to the storage device 40 via a vacuum water pump 411, and then close the inlet valve 510 and outlet valve 520 to create a relative vacuum environment. This significantly reduces the thermal conductivity of the insulation cavity 312, effectively isolating the battery temperature from the influence of the external low-temperature environment, thereby solving the problem that existing battery insulation systems cannot effectively insulate and maintain heat in cold environments. When the battery requires heat dissipation, opening the inlet valve 510 and outlet valve 520 allows the coolant to flow back from the storage device 40 to the insulation cavity 312. The flow of the coolant carries away the heat generated by the battery, solving the technical problem that the insulation structure becomes an obstacle when heat dissipation is needed. The technical solution of this embodiment utilizes the synergistic effect of the insulation cavity 312, the liquid storage device 40, and the valve assembly 50 to achieve rapid switching of the battery insulation system between different working modes. It can not only effectively maintain the battery temperature in cold environments and avoid the impact of low temperature on battery performance, but also respond quickly when the battery needs heat dissipation, thus achieving a dynamic balance between battery insulation and heat dissipation needs and solving the problem that the battery insulation system in the prior art is not conducive to battery heat dissipation.

[0043] Furthermore, the valve assembly 50 also includes a first control valve 530 and a second control valve 540. The first interface of the first control valve 530 is connected to the liquid inlet 313, the second interface of the first control valve 530 is connected to the water inlet pipe 610 of the vehicle cooling system 60, and the third interface of the first control valve 530 is connected to the liquid outlet pipe 420. The liquid inlet 313 can be selectively connected to either the liquid outlet pipe 420 or the vehicle cooling system 60 through the first control valve 530. The first interface of the second control valve 540 is connected to the liquid outlet 314, the second interface of the second control valve 540 is connected to the water outlet pipe 620 of the vehicle cooling system 60, the third interface of the second control valve 540 is connected to the liquid inlet pipe 410, and the liquid outlet 314 can be selectively connected to either the liquid inlet pipe 410 or the vehicle cooling system 60 through the second control valve 540.

[0044] In this embodiment, the valve assembly 50 further includes a first control valve 530 and a second control valve 540. The first control valve 530 has a first interface connected to the liquid inlet 313, a second interface connected to the water inlet pipe 610 of the vehicle cooling system 60, and a third interface connected to the liquid outlet pipe 420. This allows the liquid inlet 313 to selectively form a flow path with the liquid outlet pipe 420 or the water inlet pipe 610 of the vehicle cooling system 60 through the first control valve 530. The second control valve 540 has a first interface connected to the liquid outlet 314, a second interface connected to the water outlet pipe 620 of the vehicle cooling system 60, and a third interface connected to the liquid inlet pipe 410. This allows the liquid outlet 314 to selectively form a connection with the liquid inlet pipe 410 or the water outlet pipe 620 of the vehicle cooling system 60 through the second control valve 540. This design allows the coolant in the insulation body 31 of the power battery to intelligently circulate between the reservoir and the vehicle cooling system 60 according to the needs of the thermal management system, thereby achieving dynamic regulation of the battery temperature. In vacuum mode and insulation mode, the coolant is isolated outside the insulation body 31 to reduce heat conduction, while in heat dissipation mode, the coolant is connected to the vehicle cooling system 60 through the first control valve 530 and the second control valve 540 to improve heat dissipation efficiency and ensure that the battery can maintain its optimal operating temperature range under various environmental conditions.

[0045] In one exemplary embodiment of this application, the battery insulation system further includes a first liquid level detection unit for detecting the liquid level at the liquid inlet 313.

[0046] In one exemplary embodiment of this application, the battery insulation system further includes a pressure detection unit disposed within the insulation cavity 312, which is used to detect the internal pressure P0 of the insulation cavity 312.

[0047] In one exemplary embodiment of this application, a second liquid level detection unit is further provided in the liquid storage device 40, which is used to detect the liquid level in the liquid storage device 40.

[0048] Furthermore, the battery insulation system has a vacuum mode. When the battery insulation system is in vacuum mode, the inlet valve 510 is in the first closed state, the outlet valve 520 is in the second open state, the inlet pipe 410 is connected to the outlet 314, and the vacuum water pump 411 is in working state to draw the coolant in the insulation cavity 312 into the storage device 40.

[0049] In this embodiment, the battery insulation system has a vacuum mode. In this mode, the inlet valve 510 remains in the first closed state, while the outlet valve 520 is in the second open state, ensuring effective communication between the inlet pipe 410 and the outlet port 314. The vacuum pump 411 operates inside the insulation chamber 312, drawing coolant from the power battery insulation chamber into the storage device 40, creating a vacuum in the insulation chamber. In this mode, the internal pressure of the insulation chamber drops sharply, reducing the heat exchange efficiency with the outside environment, thereby achieving a highly efficient insulation effect and preventing over-cooling of the battery in low-temperature environments. Once the coolant has been completely transferred to the storage device 40, the vacuum process is complete, and the system immediately switches to insulation mode to maintain the battery temperature within a suitable range, extending the battery's lifespan and performance in extreme environments.

[0050] Furthermore, the battery insulation system has a coolant reflux mode. When the battery insulation system is in coolant reflux mode, the inlet valve 510 is in the first open state, the outlet valve 520 is in the second closed state, and the outlet pipe 420 is connected to the inlet port 313 so that the coolant in the storage device 40 flows back to the insulation chamber 312.

[0051] In this embodiment, when the power battery insulation system is in coolant recirculation mode, the inlet valve 510 of the power battery inlet is in a first open state, while the outlet valve 520 of the outlet is in a second closed state. At this time, the outlet pipe 420 is connected to the power battery inlet 313, and the coolant flows back from the inside of the storage device 40 to the insulation chamber 312, ensuring that the coolant can return smoothly and quickly in preparation for subsequent heat dissipation modes. After the coolant recirculation is completed, the entire power battery insulation system returns to a state full of coolant, and can be put into operation immediately when the vehicle has a heat dissipation requirement, realizing rapid switching and efficient utilization of system functions.

[0052] Furthermore, the battery insulation system has a heat dissipation mode. When the battery insulation system is in heat dissipation mode, the inlet valve 510 is in the first open state, the outlet valve 520 is in the second open state, the inlet port 313 is connected to the water inlet pipe 610 of the vehicle cooling system 60, and the outlet port 314 is connected to the water outlet pipe 620 of the vehicle cooling system 60.

[0053] In this embodiment, when the battery insulation system is in heat dissipation mode, the inlet valve 510 is in the first open state and the outlet valve 520 is in the second open state. The coolant can circulate between the battery insulation system and the vehicle cooling system 60, achieving efficient heat dissipation of the power battery pack. The circulating coolant not only removes the heat generated by the battery module under high load conditions but also exchanges heat with the external environment through the vehicle cooling system, effectively reducing the battery temperature and preventing performance degradation and safety hazards caused by overheating.

[0054] In one exemplary embodiment of this application, the battery insulation system has an insulation mode. When the battery insulation system is in the insulation mode, the inlet valve 510 is in a first closed state and the outlet valve 520 is in a second closed state.

[0055] In this embodiment, under heat preservation mode, the inlet valve 510 is in a first closed state, and the inlet 313 of the heat preservation body 31 is completely sealed to prevent coolant from flowing in or external air from entering the heat preservation cavity 312. At the same time, the outlet valve 520 is in a second closed state, that is, the outlet 314 is also sealed to prevent coolant or air from leaking out of the heat preservation cavity 312. The closed states of these two valves together ensure the airtightness of the heat preservation cavity 312.

[0056] According to another specific embodiment of this application, a control method for a battery heat preservation system is provided. The method is used to control the aforementioned battery heat preservation system, such as... Figure 8 As shown, the method includes the following steps:

[0057] Step S100: In response to the vehicle being in a power-off state, based on the battery temperature T0 of the vehicle battery and the ambient temperature T1 of the external environment of the vehicle, determine whether the vehicle battery meets the first heat preservation condition.

[0058] Specifically, in step S100, the first heat preservation condition can be that the battery temperature T0 is less than the set temperature T2 and the ambient temperature T1 is less than the set value T3, wherein the set temperature T2 is usually a temperature value lower than the normal operating temperature of the battery.

[0059] Step S110: In response to the vehicle battery meeting the first insulation condition and the battery insulation system not being in insulation mode, the required working mode of the battery insulation system is determined based on user demand information, wherein the user demand information is used to characterize the user's working requirements for the battery insulation system.

[0060] Step S120: In response to the demand for a heat preservation mode, the battery heat preservation system is controlled to enter a vacuum mode to perform vacuuming of the heat preservation chamber 312.

[0061] In step S130, in response to the completion of the vacuuming process, the battery insulation system is controlled to enter the insulation mode.

[0062] Applying the technical solution of this embodiment, when the vehicle is powered off, the system determines whether the first insulation condition is met based on the battery temperature T0 of the vehicle battery and the ambient temperature T1 of the external environment. If the vehicle battery meets the first insulation condition and the system is not in insulation mode, the system will determine the mode to enter based on user demand information, where user demand information reflects the user's working requirements for the insulation system. When the required working mode is determined to be insulation mode, the system will automatically control the entry into vacuum mode to perform vacuuming operation on the insulation cavity 312, so as to significantly reduce the thermal conductivity of the insulation cavity and achieve efficient insulation effect. After the vacuuming operation is completed, the system automatically enters the insulation mode. By maintaining the vacuum state of the insulation cavity 312, the battery temperature is effectively prevented from dropping rapidly in low-temperature environments, thereby achieving the technical effect of increasing the driving range of new energy vehicles in cold environments. This solves the technical problem of severe range reduction of electric vehicles under low-temperature conditions and improves the vehicle's environmental adaptability and user travel experience.

[0063] Optionally, in an exemplary embodiment of this application, step S110, determining the required operating mode of the battery insulation system based on user demand information, includes:

[0064] Step S111: Based on the automatic heat preservation information in the user demand information, determine that the required working mode of the battery heat preservation system is heat preservation mode. The automatic heat preservation information is used to indicate that when the power is off, the battery heat preservation system can enter the heat preservation mode when the vehicle battery meets the first heat preservation condition and the battery heat preservation system is not in the heat preservation mode.

[0065] In step S111, when the vehicle is powered off (i.e., not running), the system checks whether the user has preset the automatic heat preservation function. If the automatic heat preservation information exists, it indicates that the user wants the system to automatically activate the heat preservation mode when specific conditions are met. The "first heat preservation condition" typically refers to an external ambient temperature below a certain threshold (e.g., set temperature T3), while the battery's current state is not suitable for immediate heat preservation (e.g., the battery temperature is too high). When the system detects that the external ambient temperature is below the set value and the battery heat preservation system is not currently in heat preservation mode, it will automatically determine the required operating mode as heat preservation mode and execute the corresponding mode switching process to achieve the best heat preservation effect.

[0066] Optionally, in an exemplary embodiment of this application, step S110, determining the required operating mode of the battery insulation system based on user demand information, further includes:

[0067] Step S112: Based on the user confirmation information in the user demand information, determine that the required working mode of the battery insulation system is insulation mode, wherein the user confirmation information is used to indicate that the user confirms the activation of the insulation mode.

[0068] Through step S112, users can also manually confirm the activation of the insulation mode via an in-vehicle information system (such as an IVI infotainment system) or a mobile app. When a user has a clear need for insulation, a user confirmation message will be sent to the system. After receiving the message, the system will determine that the required operating mode of the battery insulation system is insulation mode, execute the vacuuming process, and switch to insulation mode. The processing of user confirmation messages provides users with a more flexible and autonomous way to control insulation.

[0069] Furthermore, the method also includes:

[0070] Step S140: In response to the battery insulation system being in insulation mode and the vehicle battery meeting the first heating condition, a first reminder message and a second reminder message are generated. The first reminder message is used to remind the user to confirm whether to turn on the heating, and the second reminder message is used to remind the user to enter the expected travel time.

[0071] Step S150: In response to the user's confirmation that heating has been turned on, control the battery heating system to enter the heating mode;

[0072] Step S160: In response to the user having entered the estimated travel time, control the battery heating system to enter the heating mode at a preset heating time, wherein the preset heating time is before the estimated travel time;

[0073] In step S170, in response to the battery heating system being in heating mode and the vehicle battery meeting the second heat preservation condition, the battery heating system is controlled to stop heating, and the battery heat preservation system is controlled to maintain heat preservation mode.

[0074] In this embodiment, when the battery insulation system is in insulation mode and the vehicle battery meets the first heating condition, the system generates a first reminder message and a second reminder message. The first reminder message asks the user to confirm activating battery heating, while the second reminder message requests the user to input their expected travel time. In response to the user's confirmation, the system controls the battery heating system to enter heating mode and begins heating the battery. If the user provides an expected travel time, the system will automatically activate the heating mode at a preset heating time point to ensure that the battery temperature reaches a suitable operating state before travel. The preset heating time is before the expected travel time to allow sufficient heating time. Once the battery heating system is in heating mode and the vehicle battery meets the second insulation condition, i.e., the battery temperature reaches the safe operating range, the system will control the battery heating system to stop heating and maintain the battery insulation system in insulation mode to keep the battery temperature stable and avoid potential damage to the battery from overheating. This intelligent control strategy not only improves the battery's efficiency in low-temperature environments but also enhances the user experience and ensures the safe operation of the battery.

[0075] Specifically, in step S140, the first heating condition is that the battery temperature T0 is less than the set temperature T4, and in step S170, the second heat preservation condition is that the battery temperature T0 is greater than or equal to the set temperature T5. Wherein, the set temperature T4 is greater than the set temperature T2.

[0076] Furthermore, the method also includes:

[0077] Step S200: In response to the vehicle being powered on, determine whether the vehicle battery meets the third insulation condition based on the battery temperature T0 of the vehicle battery.

[0078] Step S210: In response to the vehicle battery meeting the third insulation condition and the battery insulation system not being in insulation mode, the battery insulation system is controlled to enter the vacuuming mode to perform vacuuming work on the insulation chamber 312.

[0079] Specifically, the third insulation condition is that the battery temperature T0 is less than the set temperature T6.

[0080] In step S220, in response to the completion of the vacuuming process, the battery insulation system is controlled to enter the insulation mode.

[0081] In this embodiment, when the vehicle is powered on, the system determines whether the specific third insulation condition is met based on the actual battery temperature T0. If the vehicle battery meets the third insulation condition and the battery insulation system is not yet in insulation mode, the system will automatically enter vacuum mode. This involves activating the vacuum pump and using the three-way valve 2 to draw coolant from the power battery insulation chamber 312 into the storage device, creating a vacuum. Once the vacuum process is complete, i.e., the internal pressure of the power battery insulation chamber 312 drops to a predetermined level, the system switches to insulation mode. In this vacuum state, the heat transfer coefficient of the insulation chamber 312 is significantly reduced, effectively preventing a rapid drop in battery temperature. This ensures stable battery temperature in cold environments, helps maintain the battery within its optimal operating temperature range, and extends the vehicle's driving range in low-temperature conditions. This automated control allows for rapid response to low-temperature environments, flexibly adjusting the battery thermal management system to enhance the vehicle's adaptability and performance under different environmental conditions.

[0082] Furthermore, the method also includes:

[0083] Step S230: In response to the battery insulation system being in insulation mode, control the battery heating system to enter heating mode;

[0084] Step S240: In response to the battery heating system being in heating mode and the vehicle battery meeting the preset reflux conditions, control the battery heating system to stop heating and control the battery insulation system to enter the coolant reflux mode to perform coolant reflux work on the insulation chamber 312.

[0085] Specifically, the preset reflux condition is that the battery temperature T0 is greater than the set temperature T7, where the set temperature T7 is greater than the set temperature T6.

[0086] In step S250, in response to the completion of coolant reflux and the vehicle battery meeting preset heat dissipation conditions, the battery insulation system is controlled to enter the heat dissipation mode.

[0087] Specifically, in step S250, the preset heat dissipation condition is that the battery temperature T0 > the set temperature T8, wherein the set temperature T8 > the set temperature T7.

[0088] In this embodiment, when the vehicle is powered on, once the battery insulation system is in insulation mode, the battery heating system can be controlled to enter heating mode to heat the vehicle battery to its suitable operating temperature. When the vehicle battery meets the preset reflux conditions, the battery heating system stops heating and simultaneously controls the battery insulation system to enter coolant reflux mode. In this mode, coolant automatically flows back from the reservoir to the insulation chamber 312. Subsequently, the system controls the battery insulation system to automatically switch to heat dissipation mode, and the coolant circulates between the insulation chamber 312 and the vehicle's cooling system, effectively dissipating heat from the power battery and ensuring the temperature stability of the battery module under high load conditions. This intelligent control process not only achieves efficient thermal management of the battery in different environments but also improves the system's response speed and energy-saving effect, ensuring the vehicle's safety and performance under various operating conditions.

[0089] It should be understood that after the battery insulation system is in insulation mode, controlling the battery heating system to enter heating mode can utilize the insulation effect of the battery insulation system to accelerate the battery's temperature rise rate, allowing the battery to reach a suitable operating temperature in a shorter time. Once the battery temperature rises to a certain level, the coolant return mode is activated, allowing coolant to be injected into the insulation chamber 312 to prepare for subsequent battery heat dissipation. During vehicle operation, the battery temperature typically rises with driving time, at which point the battery insulation system enters heat dissipation mode to promptly cool the battery and ensure it remains at a suitable operating temperature.

[0090] This application also provides a preferred embodiment of a vacuum power battery insulation system and control method, which can be vacuumed to enter the insulation mode or filled with coolant to enter the heat dissipation mode as needed, to meet the thermal management needs of power batteries in various scenarios.

[0091] Specifically, the vacuum power battery insulation system includes a battery housing 11, an insulation body 31, a first three-way valve, a second three-way valve, a liquid storage tank, and a vacuum water pump. The battery housing 11 has a receiving space, in which at least one battery module is installed. The insulation body 31 is disposed within the receiving space. In the heat dissipation state, the insulation body 31 is filled with coolant, which is used for heat exchange with the battery module. The insulation body 31 forms a receiving cavity 311. The insulation body 31 has a plate-like structure and is disposed at the bottom, sides, middle partition, and top of the receiving space. The cavity wall of the receiving cavity 311 completely encloses the battery module and makes good contact with the battery module to achieve effective insulation and heat dissipation. In this embodiment, the vacuum power battery insulation system covers the battery cell with the insulation body 31. The power battery integration method can be any one of CTP, CTC, and CTB.

[0092] Multiple insulation chambers 312 are formed within the insulation body 31, and these chambers are interconnected. In heat dissipation mode, each insulation chamber 312 is filled with coolant. At least one pressure sensor is installed within each insulation chamber 312 to detect the internal pressure P0. The insulation body 31 has a liquid inlet 313 and a liquid outlet 314, each equipped with an automatic locking mechanism. This mechanism has a locking position to block the liquid inlet 313 and the liquid outlet 314, and an opening position to open them. The liquid inlet 313 and the liquid outlet 314 are connected to the insulation chambers 312. Specifically, to ensure uniform coolant discharge during vacuuming, the liquid outlet 314 should have multiple interconnecting openings evenly distributed at the bottom of the insulation chambers 312 via flow channels. A liquid level sensor is installed at the liquid inlet 313 to detect the coolant filling and extraction status.

[0093] The first three-way valve (i.e., the aforementioned first control valve 530) has its valve port 1 connected to the power battery inlet, its valve port 2 connected to the cooling system water inlet pipe, and its valve port 3 connected to the storage tank outlet. The connection between valve port 1 and valve port 2, or between valve port 1 and valve port 3, can be electrically controlled.

[0094] The second three-way valve (i.e., the aforementioned second control valve 540) has its valve port 1 connected to the power battery outlet, its valve port 2 connected to the cooling system water outlet, and its valve port 3 connected to the storage tank inlet via the vacuum water pump 411. The connection between valve port 1 and valve port 2, or between valve port 1 and valve port 3, of the second control valve 540 can be electrically controlled.

[0095] The inlet of the vacuum water pump 411 is connected to the valve port 3 of the second three-way valve, and the outlet is connected to the inlet of the storage tank. It is used to draw the coolant in the power battery insulation cavity to the storage tank, so that the power battery insulation cavity is in a vacuum state.

[0096] The coolant reservoir (i.e., the aforementioned coolant storage device 40) should be positioned higher than the power battery in the vehicle to prevent coolant backflow and overflow. The coolant inlet is located at the top of the reservoir, and the outlet is located at the bottom. A level sensor is installed inside the reservoir to detect the coolant level, ensuring that the coolant level is always higher than the outlet to prevent air from entering the outlet pipe. A vent plug 430 is installed on the top of the reservoir to ensure pressure balance between the reservoir and the outside environment.

[0097] The system is equipped with an external pressure sensor to detect the external air pressure P1 and a temperature sensor to detect the external temperature T1. The battery temperature T0 is obtained from the BMS battery management system.

[0098] By incorporating sensors and other components, the vacuum power battery insulation system in this embodiment can intelligently determine the power battery's thermal management needs based on the battery, ambient temperature, and vehicle status, and switch between insulation and heat dissipation modes as needed. The following explanation, in conjunction with the functional schematics, further clarifies the implementation of each mode's function:

[0099] Vacuum mode: such as Figure 3 As shown, the power battery inlet is in the locked position, and the outlet is in the open position. The second three-way valve connects valve port 1 and valve port 3, and the vacuum water pump starts to draw liquid from the power battery insulation chamber into the storage tank. The process continues until the liquid level sensor at the inlet detects that the liquid level H0 is lower than the set value H1 and the relative vacuum degree ΔP1 (ΔP1 = internal air pressure P0 of the insulation chamber - external air pressure P1) is lower than the set value ΔP0. At this point, the power battery outlet valve is closed, and the vacuum water pump is shut off, entering the insulation mode.

[0100] Keep warm mode, such as Figure 4 As shown, the liquid level sensor at the inlet detects that the liquid level H0 is lower than the set value H1 and the relative vacuum degree ΔP0 (internal air pressure P0 of the insulation chamber - external air pressure P1) is lower than the set value ΔP1. The power battery outlet and inlet are in locked mode. In this mode, the power battery module is surrounded by the insulation chamber under vacuum, resulting in extremely low heat dissipation coefficient and significantly improved heat preservation capability.

[0101] Coolant recirculation mode: such as Figure 5 As shown, the power battery outlet is locked and the inlet is open. The first three-way valve controls the connection between valve port 1 and valve port 3. Under the action of air pressure and gravity, the coolant automatically flows back into the power battery insulation cavity. When the liquid level sensor at the inlet detects that the liquid level height H0 is higher than the set height H2, the coolant return is completed.

[0102] Cooling modes: such as Figure 6 As shown, both the inlet and outlet of the power battery are open. The first three-way valve controls the connection between valve port 1 and valve port 2, and the second three-way valve controls the connection between valve port 1 and valve port 2. The coolant flows through the cooling system inlet pipe, through the first three-way valve and the power battery inlet into the power battery. After circulation, it carries away the heat and flows out through the power battery outlet and the second three-way valve from the cooling system outlet pipe, participating in the circulation of the vehicle cooling system to achieve the power battery heat dissipation function.

[0103] like Figure 9 As shown, the control method of the vacuum power battery insulation system in this embodiment after the vehicle is powered off is as follows:

[0104] Step 1) After the vehicle is powered off, the system first determines whether the battery temperature T0 has dropped below the set temperature T2 to avoid damage to the battery due to excessive internal temperature. If T0 ≥ T2, the system will re-detect every Δt0 time until T0 < T2, at which point the cooling system will stop working.

[0105] Step 2) When the battery temperature T0 < T2, the system determines whether the heat preservation mode needs to be activated based on the ambient temperature. If the ambient temperature T1 is less than the set value T3, the system recognizes that the vehicle is in a cold environment and determines that the heat preservation mode needs to be activated.

[0106] Step 3), check if the current mode is in heat preservation mode. If it is already in heat preservation mode, then keep it in heat preservation mode.

[0107] Step 4) Identify whether the vehicle owner has enabled the automatic heat preservation function. If not, send a message to the vehicle owner's mobile phone via T-BOX to ask whether to enable the heat preservation mode. If the owner selects to enable it, the system will enter the vacuuming mode.

[0108] Step 5), the system determines whether the vacuuming is complete based on the liquid level height H0 of the liquid level sensor. If H0 < H1 (set liquid level height), the vacuuming action is considered complete.

[0109] Step 6) Detect the internal vacuum degree ΔP0 and determine if there is an airtightness problem. If ΔP0 ≥ ΔP1 (set vacuum degree), the system has an airtightness fault, reports a fault code and notifies the vehicle owner of a serious fault to be repaired as soon as possible; if ΔP0 < ΔP1 (set vacuum degree), the airtightness is normal and the system enters the heat preservation mode.

[0110] Step 7) In the heat preservation mode, the battery temperature is checked every Δt1 time. If the battery temperature T0 is less than the set temperature T4, it means that the battery temperature is too low. The T-BOX sends a message to the car owner to ask whether to turn on the battery heating or set the estimated travel time. If the car owner does not reply, the process is repeated every Δt2 time.

[0111] Step 8) If the vehicle owner selects to turn on the heating, the vehicle will be controlled to turn on the battery pulse heating. During the heating process, the battery temperature will be continuously monitored. When the battery temperature T0 is greater than or equal to the set temperature T5, the heating will be stopped and the vehicle will return to the heat preservation mode.

[0112] Step 9) If the car owner selects the expected travel time, the pulse heating will be turned on Δt3 time in advance. During the heating process, the battery temperature will be continuously monitored. When the battery temperature T0 is greater than or equal to the set temperature T5, the heating will be stopped and the car will return to the heat preservation mode.

[0113] like Figure 10 As shown, the control method of the vacuum power battery insulation system in this embodiment after the vehicle is powered on is as follows:

[0114] Step 1), first determine whether the heat preservation mode needs to be turned on based on the power battery temperature T0. If the power battery temperature T0 < T6, it is determined that the external environment is cold and the heat preservation mode needs to be turned on.

[0115] Step 2) Determine if the vehicle is currently in heat preservation mode. If it is in heat preservation mode, maintain heat preservation mode; if it is not in heat preservation mode, activate vacuum mode.

[0116] Step 3), the system determines whether the vacuuming is complete based on the liquid level height H0 of the liquid level sensor. If H0 < H1 (set liquid level height), the vacuuming action is considered complete.

[0117] Step 4) Check the internal vacuum level ΔP0 to determine if there is an airtightness problem. If ΔP0 ≥ ΔP1 (set vacuum level), the system has an airtightness fault, reports a fault code and notifies the owner of the serious fault for prompt repair. If ΔP0 < ΔP1 (set vacuum level), the airtightness is normal, and the system enters the heat preservation mode.

[0118] Step 5) Activate the heating mode to help the battery quickly heat up to the operating temperature through pulse heating. When the battery temperature T0 > the set temperature T7, turn off the heating mode.

[0119] Step 6), activate the coolant recirculation mode and check the coolant level at the power battery inlet until H0 ≥ H2, at which point the coolant recirculation is complete;

[0120] Step 7), monitor the power battery temperature. When T0 > set temperature T8, activate the heat dissipation mode.

[0121] The control principle of the vacuum power battery insulation system in this embodiment is as follows: Figure 7As shown, specifically, the vacuum power battery insulation system controller 820, T-BOX (Telematics Box, i.e., vehicle-mounted remote information processing system box) 830, BMS battery management system 840, IVI entertainment host 850, and thermal management system 860 are connected to the vehicle controller 810 via CAN bus 870. The vacuum power battery insulation system controller 820 directly drives the first three-way valve, the second three-way valve, the vacuum water pump 411, the power battery water inlet valve, and the water outlet valve, and collects status signals. At the same time, the vacuum power battery insulation system controller 820 collects signals from the liquid level sensor 710, the external temperature sensor 720, the internal pressure sensor 730, and the external pressure sensor 740. The thermal management system 860, in conjunction with the vacuum power battery insulation system, completes the thermal management function control of the entire vehicle (in practical applications, the two can be combined or their functions can be integrated into the vehicle controller or area controller). The IVI entertainment host 850 is used to display mode information and realize the interactive setting function. The T-BOX uploads signals to the cloud server and receives instructions from the cloud server. The cloud server and the mobile APP can send and receive information.

[0122] The vacuum power battery insulation system in this embodiment is mainly used for battery insulation in cold environments, aiming to increase the driving range of new energy vehicles in cold conditions and improve their environmental adaptability. By detecting the ambient temperature and the power battery temperature, combined with the vehicle's operating status, the system can intelligently determine the power battery's thermal management needs. In insulation mode, a vacuum pump draws coolant from the power battery insulation cavity into a storage tank, creating a vacuum in the battery insulation cavity. This reduces the heat transfer coefficient to ≤0.005W / (m²). K) is equivalent to an initial cell temperature of 25°C, an external ambient temperature of -10°C, and a cell temperature drop of less than 8°C after 12 hours of shutdown. In heat dissipation mode, the coolant flows back from the reservoir to the battery insulation chamber, and the cooling circuit valves open to achieve efficient battery heat dissipation. Through intelligent control in conjunction with the thermal management system, this solution can achieve energy-saving and intelligent battery temperature control, solving problems related to low-temperature battery capacity, charging efficiency, and thermal runaway.

[0123] According to another specific embodiment of this application, a vehicle is also provided, the vehicle having a battery insulation system, the battery insulation system being the aforementioned battery insulation system.

[0124] The battery insulation system can intelligently switch between vacuum insulation and coolant cooling modes. In insulation mode, a vacuum with low thermal conductivity is created inside the insulation structure by evacuation, reducing heat conduction and achieving insulation to prevent the impact of low temperatures on battery performance. In cooling mode, the coolant circulates through specific pipelines to quickly remove the heat generated by the battery, ensuring stable operation even under high-temperature conditions. The variable thermal management characteristics of the battery insulation system effectively maintain the temperature of the power battery in cold environments, thereby improving the vehicle's range and overall performance under low-temperature conditions, enhancing the flexibility and efficiency of the battery system, and solving the technical problems of single insulation and cooling functions and poor adaptability in existing technologies. It achieves efficient and stable temperature control of the power battery under various environmental conditions.

[0125] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0126] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0127] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0128] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A battery insulation system, characterized in that, include: The heat-insulating body (31) has a receiving cavity (311) for accommodating the battery (21). A heat-insulating cavity (312) is provided in the cavity wall of the receiving cavity (311). The heat-insulating cavity (312) has a liquid inlet (313) and a liquid outlet (314). Both the liquid inlet (313) and the liquid outlet (314) are connected to the outside. A liquid storage device (40) has an inlet pipe (410) and an outlet pipe (420). A vacuum water pump (411) is installed on the inlet pipe (410). The inlet pipe (410) is optionally connected to the outlet (314), and the outlet pipe (420) is optionally connected to the inlet (313). The valve assembly (50) includes an inlet valve (510) and an outlet valve (520), wherein the inlet valve (510) has a first open state of opening the inlet port (313) and a first closed state of closing the inlet port (313), and the outlet valve (520) has a second open state of opening the outlet port (314) and a second closed state of closing the outlet port (314).

2. The battery insulation system according to claim 1, characterized in that, The valve assembly (50) further includes: A first control valve (530) has a first port connected to the liquid inlet (313), a second port connected to the water inlet pipe (610) of the vehicle cooling system (60), and a third port connected to the liquid outlet pipe (420). The liquid inlet (313) can be selectively connected to either the liquid outlet pipe (420) or the vehicle cooling system (60) through the first control valve (530). The second control valve (540) has a first interface connected to the liquid outlet (314), a second interface connected to the water outlet pipe (620) of the vehicle cooling system (60), and a third interface connected to the liquid inlet pipe (410). The liquid outlet (314) can be selectively connected to either the liquid inlet pipe (410) or the vehicle cooling system (60) through the second control valve (540).

3. The battery insulation system according to claim 1, characterized in that, The battery insulation system has a vacuum mode. When the battery insulation system is in the vacuum mode, the liquid inlet valve (510) is in the first closed state, the liquid outlet valve (520) is in the second open state, the liquid inlet pipe (410) is connected to the liquid outlet (314), and the vacuum water pump (411) is in working state to draw the coolant in the insulation cavity (312) into the liquid storage device (40).

4. The battery insulation system according to claim 1, characterized in that, The battery insulation system has a coolant reflux mode. When the battery insulation system is in the coolant reflux mode, the inlet valve (510) is in the first open state, the outlet valve (520) is in the second closed state, and the outlet pipe (420) is connected to the inlet (313) so that the coolant in the storage device (40) flows back to the insulation cavity (312).

5. The battery insulation system according to claim 2, characterized in that, The battery insulation system has a heat dissipation mode. When the battery insulation system is in the heat dissipation mode, the inlet valve (510) is in the first open state, the outlet valve (520) is in the second open state, the inlet port (313) is connected to the water inlet pipe (610) of the vehicle cooling system (60), and the outlet port (314) is connected to the water outlet pipe (620) of the vehicle cooling system (60).

6. A control method for a battery heat preservation system, characterized in that, The method is used to control the battery insulation system according to any one of claims 1-5, and the method includes the following steps: In response to the vehicle being powered off, the system determines whether the vehicle battery meets the first insulation condition based on the battery temperature T0 of the vehicle battery and the ambient temperature T1 of the external environment of the vehicle. In response to the vehicle battery meeting the first insulation condition and the battery insulation system not being in insulation mode, the required operating mode of the battery insulation system is determined based on user demand information, wherein the user demand information is used to characterize the user's operating requirements for the battery insulation system. In response to the required working mode being the heat preservation mode, the battery heat preservation system is controlled to enter the vacuum mode to perform vacuuming work on the heat preservation chamber (312); In response to the completion of the vacuuming process, the battery insulation system is controlled to enter the insulation mode.

7. The method according to claim 6, characterized in that, The method further includes: In response to the battery insulation system being in the insulation mode and the vehicle battery meeting the first heating conditions, a first reminder message and a second reminder message are generated. The first reminder message is used to remind the user to confirm whether to turn on the heating, and the second reminder message is used to remind the user to input the expected travel time. In response to the user's confirmation of activating heating, the battery heating system is controlled to enter heating mode; In response to the user having entered an estimated travel time, the battery heating system is controlled to enter the heating mode at a preset heating time, wherein the preset heating time is before the estimated travel time; In response to the battery heating system being in the heating mode and the vehicle battery meeting the second heat preservation condition, the system controls the battery heating system to stop heating and controls the battery heat preservation system to maintain the heat preservation mode.

8. The method according to claim 6, characterized in that, The method further includes: In response to the vehicle being powered on, based on the battery temperature T0 of the vehicle battery, it is determined whether the vehicle battery meets the third insulation condition; In response to the vehicle battery meeting the third insulation condition and the battery insulation system not being in insulation mode, the battery insulation system is controlled to enter vacuum mode to perform vacuuming work on the insulation chamber (312). In response to the completion of the vacuuming process, the battery insulation system is controlled to enter the insulation mode.

9. The method according to claim 8, characterized in that, The method further includes: In response to the battery insulation system being in the insulation mode, the battery heating system is controlled to enter the heating mode; In response to the battery heating system being in the heating mode and the vehicle battery meeting the preset reflux conditions, the battery heating system is controlled to stop heating, and the battery insulation system is controlled to enter the coolant reflux mode to perform coolant reflux operation on the insulation cavity (312). In response to the completion of the coolant reflux and the vehicle battery meeting the preset heat dissipation conditions, the battery insulation system is controlled to enter the heat dissipation mode.

10. A vehicle, characterized in that, The vehicle has a battery insulation system, which is the battery insulation system according to any one of claims 1-5.

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