Battery heat preservation device for severe cold area

Abstract

The invention discloses a battery heat preservation device for severe cold areas, and aims to solve the problems of poor cold resistance and high heating energy consumption caused by direct placement of an energy storage cabinet on the ground in the prior art. The protection box is used for containing the energy storage cabin, an existing energy storage cabin is directly arranged on the ground, when the existing energy storage cabin is in a severe cold environment, the existing energy storage cabin completely depends on active heating of heating equipment in the energy storage cabin for heat preservation, energy consumption is huge, heat generated when a battery in the energy storage cabin works is directly dissipated into air, and waste is caused. The energy storage cabin is movably installed in the protection box, the lower end of the protection box is buried underground, in a severe cold environment, the energy storage cabin can be driven by the traction mechanism to move downwards to the heat preservation position at the lower end of the protection box, and heat preservation is conducted on the energy storage cabin through the heat insulation and constant temperature characteristics of underground soil; therefore, power consumed by the heating equipment is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery heat preservation, and particularly relates to a battery heat preservation device for severe cold regions. BACKGROUND

[0002] Energy storage cabin, also known as energy storage cabinet, is used for storing battery pack composed of lithium ion battery or lead-acid battery, and generally selects container, especially the standard 20-foot container in the form of 6058mm*2438mm*2896mm in length, width and height, which is widely used in the field of grid energy storage, standby power supply and the like. However, the performance and service life of chemical power sources such as lithium ion batteries are greatly affected by temperature. In severe cold regions, extremely low winter temperature can cause battery capacity to decrease sharply, internal resistance to increase, and even cannot be normally charged and discharged.

[0003] The existing energy storage cabinet is generally arranged on the ground and actively controlled by the internal heat dissipation device or heat preservation device, which has extremely high energy consumption. For example, CN111048869A discloses a lithium battery heat dissipation and heat preservation system, when the temperature is high, the air passage in the heat preservation device is opened through the communication of the air guide channel and the air guide hole, the air flow is driven by the heat dissipation fan controlled by the single-chip microcomputer controller, and the heat is dissipated outside, when the temperature is low, the single-chip microcomputer controller controls the electric heating rod in the water tank to work, the water in the water tank is heated, and the water pump can guide the hot water into the heat exchange pipe through the water inlet pipe, so as to realize the heat preservation of the battery body.

[0004] However, the energy storage cabinet is directly arranged on the ground, and in severe cold regions, the energy storage cabinet needs to consume a large amount of power for heat preservation. Therefore, there is an urgent need for a battery heat preservation device for severe cold regions and a battery thermal management device for reducing operating energy consumption. SUMMARY

[0005] The present application aims to significantly reduce the operating energy consumption of the battery thermal management system in severe cold regions by designing the energy storage cabin as a structure that can move between the underground heat preservation position and the ground heat dissipation position, and using the natural constant temperature characteristics of the soil to passively heat the battery.

[0006] To achieve the above objectives, the present invention provides a battery insulation system for use in extremely cold regions, comprising: an energy storage compartment for housing a battery; a protective box for housing the energy storage compartment, the lower end of which is buried below ground to form an insulation position, and the upper part exposed above ground to form a heat dissipation position; a traction mechanism connected between the protective box and the energy storage compartment for driving the energy storage compartment to move between the insulation position and the heat dissipation position of the protective box; a temperature sensing unit for detecting ambient temperature, underground temperature, and battery temperature; and a controller electrically connected to the temperature sensing unit and the traction mechanism, configured to: control the traction mechanism to move the energy storage compartment to the insulation position or the heat dissipation position based on the ambient temperature, underground temperature, and battery temperature.

[0007] Furthermore, the energy storage compartment is equipped with a temperature regulation device, which is electrically connected to the controller.

[0008] Furthermore, the temperature control device includes an active air-cooling device; The energy storage compartment has an internal window on its side, and the upper side of the protective box has an openable and closable external window corresponding to the internal window. A baffle is movably installed on the lower side of the external window via a first electric push rod. The signal input end of the first electric push rod is electrically connected to the signal output end of the controller.

[0009] Furthermore, the temperature sensing unit includes an ambient temperature sensor, an underground temperature sensor, and a battery temperature sensor. The ambient temperature sensor is installed on the upper exterior of the protective box to obtain the temperature above the ground surface. The underground temperature sensor is installed on the lower exterior of the protective box to obtain the temperature below the ground surface. The battery temperature sensor is installed inside the energy storage compartment to obtain the ambient temperature of the battery.

[0010] Furthermore, a thermal insulation partition is horizontally slidable on the side of the protective box, and the thermal insulation partition is used to move to the top of the energy storage compartment when the energy storage compartment enters the bottom of the protective box; Insulation boards are fixedly installed on the lower side and bottom of the protective box.

[0011] Furthermore, the lower side of the protective box is integrally formed with a cavity for temporarily storing the thermal insulation partition. A second electric push rod is fixed in the cavity. The signal input end of the second electric push rod is connected to the signal output end of the controller, and the telescopic end of the second electric push rod is fixedly connected to one end of the thermal insulation partition.

[0012] Furthermore, the traction mechanism includes a motor fixed inside the upper part of the protective box, the output shaft of the motor is fixed with a steel cable pulley, one end of the steel cable is connected to the steel cable pulley, and the other end of the steel cable is fixedly connected to the top of the energy storage compartment. The inner wall of the protective box is fixed with a vertical guide rail, and the side of the energy storage compartment is fixed with a sliding guide block that slides in cooperation with the vertical guide rail.

[0013] Furthermore, the protective box is equipped with a limiting mechanism for supporting the energy storage compartment. The limiting mechanism includes a third electric push rod fixed to the side of the protective box. A support plate is fixed to the telescopic end of the third electric push rod, and the other end of the support plate connected to the third electric push rod extends into the interior of the protective box.

[0014] Furthermore, one end of a drag chain is fixedly connected to the lower end of the energy storage compartment, and the other end of the drag chain is fixedly connected to the inner wall of the protective box.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 0. Existing energy storage compartments are directly installed on the ground. In extremely cold environments, they rely entirely on internal heating equipment for active heating and insulation, resulting in huge energy consumption. Furthermore, the heat generated by the batteries inside the compartment is directly dissipated into the air, causing heat loss. This invention, however, movably mounts the energy storage compartment within a protective enclosure, with the lower end of the enclosure buried underground. In extremely cold environments, a traction mechanism moves the energy storage compartment downwards to an insulated position at the bottom of the protective enclosure. The insulation and temperature-regulating properties of the underground soil are then used to insulate the energy storage compartment, thereby reducing the power consumption of the heating equipment.

[0016] 1. When the energy storage compartment is insulated underground in frigid weather, and the heat generated by the compartment itself causes it to exceed the optimal operating temperature, the controller can be used to operate the second electric push rod and the first electric push rod to open the baffle of the external window and the insulation partition on the top of the insulation position. The chimney effect formed by the temperature difference of the natural environment is used to accelerate the heat exchange between the hot air inside the energy storage compartment and the cold air in the environment, thereby achieving passive cooling and saving electricity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the energy storage compartment of the present invention in a thermal insulation state.

[0018] Figure 2 This is a schematic diagram of the energy storage compartment of the present invention in a heat dissipation state.

[0019] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the energy storage compartment of the present invention.

[0021] Figure 5 This is a schematic diagram of the internal cross-sectional structure of the present invention.

[0022] Figure 6 This is a schematic cross-sectional view of the energy storage compartment of the present invention.

[0023] Figure 7 This is a schematic diagram of the controller connection for an embodiment of a battery insulation device for extremely cold regions according to the present invention.

[0024] In the diagram: 1. Energy storage compartment; 2. Battery; 3. Protective box; 4. Traction mechanism; 5. Ambient temperature sensor; 6. Underground temperature sensor; 7. Battery temperature sensor; 8. Insulation partition; 9. Insulation board; 10. Vertical guide rail; 11. Sliding guide block; 12. Limiting mechanism; 13. Cable drag chain; 14. Internal window; 15. External window; 16. Baffle; 17. First electric push rod; 18. Second electric push rod; 19. External cable; 41. Electric motor; 42. Steel cable pulley; 43. Steel cable; 121. Third electric push rod; 122. Support plate. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figure 1 and Figure 7 As shown, this embodiment provides a battery insulation device for extremely cold regions. This device aims to solve the problems of severe performance degradation and high heating energy consumption of batteries in extreme cold winter environments. It includes an energy storage compartment 1, a protective box 3, a traction mechanism 4, a temperature sensing unit, and a controller.

[0027] The energy storage compartment 1 is an existing device used to house the battery 2. In this embodiment, the energy storage compartment 1 is preferably a standard 20-foot container with a height of approximately 2.9 meters. In addition to installing the battery 2, the energy storage compartment 1 can also be equipped with temperature regulation equipment as needed. The temperature regulation equipment is electrically connected to a controller and is used to actively regulate the temperature inside the energy storage compartment 1. In this embodiment of the invention, the temperature regulation equipment includes a cooling device and a heating device. The cooling device can be one or more of the semiconductor cooling device, liquid cooling device, and active air cooling device disclosed in Chinese Patent CN111048869A, a lithium battery heat dissipation and insulation system. The heating device can be the liquid thermal heating device disclosed in Chinese Patent CN111048869A, a lithium battery heat dissipation and insulation system. Since the semiconductor cooling device, liquid cooling device, active air cooling device, and liquid thermal heating device are conventional technologies in the prior art and have been described in detail in the published patent, they will not be elaborated here.

[0028] The protective box 3 is a vertically arranged box structure used to house the energy storage compartment 1 and constitutes the main protective environment for the energy storage compartment 1. The lower part of the protective box 3 is buried below ground level, with a burial depth of not less than 5 meters, forming an insulation device that can keep the energy storage compartment 1 warm by utilizing the heat insulation and constant temperature properties of the underground soil. The upper part of the protective box 3 is exposed above ground level, forming a heat dissipation device that can dissipate heat from the energy storage compartment 1. It can be understood that when the cooling equipment of the energy storage compartment 1 includes an active air cooling device, the side of the energy storage compartment 1 is provided with an internal window 14, and the upper side of the protective box 3 has an openable and closable external window 15 corresponding to the internal window 14. Through the arrangement of the internal window 14 and the external window 15, the interior of the energy storage compartment 1 can exchange heat with the air outside the protective box 3. Specifically, a baffle 16 is provided on the outer side of the external window 15, and a first electric push rod 17 is fixed to the lower side of the external window 15. The signal input end of the first electric push rod 17 is electrically connected to the signal output end of the controller, and the telescopic end of the first electric push rod 17 is fixedly connected to the upper end of the baffle 16. By telescopically extending the first electric push rod 17, the baffle 16 can be moved up and down at the opening of the external window 15, thereby realizing the opening and closing of the external window 15.

[0029] The traction mechanism 4 connects the protective box 3 and the energy storage compartment 1, and is used to drive the energy storage compartment 1 to move up and down inside the protective box 3, realizing the movement of the energy storage compartment 1 between the insulation device and the heat dissipation position. Specifically, the existing energy storage compartment 1 is directly exposed to the ground. In cold weather, in order to keep the battery 2 at a suitable temperature, heating equipment is required, which consumes a lot of electricity. The battery insulation device of the present invention can drive the energy storage compartment 1 downward to the insulation device at the lower end of the protective box 3 through the traction mechanism 4. The heat insulation and constant temperature characteristics of the underground soil are used to insulate the energy storage compartment 1, thereby reducing the power consumption of the heating equipment. When the cold weather ends, the energy storage compartment 1 can be driven upward to the heat dissipation position by the traction mechanism 4 for normal heat dissipation. In this embodiment, the traction mechanism 4 includes a motor 41 fixed inside the upper part of the protective box 3. The signal input terminal of the motor 41 is electrically connected to the signal output terminal of the controller. A steel cable pulley 42 is fixed to the output shaft of the motor 41. One end of a steel cable 43 is connected to the steel cable pulley 42. The other end of the steel cable 43 is fixedly connected to the top of the energy storage compartment 1. The controller controls the operation of the motor 41. When the motor 41 is working, it drives the steel cable pulley 42 to rotate. When the steel cable pulley 42 rotates, it drives the steel cable 43 to be wound up or unwound, so that the energy storage compartment 1 moves up and down inside the protective box 3.

[0030] The temperature sensing unit is used to detect ambient temperature, underground temperature, and battery temperature, and includes an ambient temperature sensor 5, an underground temperature sensor 6, and a battery temperature sensor 7. The ambient temperature sensor 5 is installed on the upper exterior of the protective casing 3 to monitor the ambient temperature above the ground in real time. The underground temperature sensor 6 is installed on the lower exterior of the protective casing 3 to monitor the soil temperature at a specific underground depth in real time. The battery temperature sensor 7 is installed inside the energy storage compartment 1 to directly obtain the temperature of the environment in which the battery 2 is located.

[0031] The controller is preferably an industrial PLC, which can be installed inside the energy storage compartment 1 (not shown in the figure). Its signal input terminal is electrically connected to the signal output terminals of the ambient temperature sensor 5, the underground temperature sensor 6, and the battery temperature sensor 7 of the temperature sensing unit. Its signal output terminal is electrically connected to the signal input terminal of the motor 41 of the traction mechanism 4. It is used to control the traction mechanism 4 to move the energy storage compartment 1 to the insulation position or the heat dissipation position based on the ambient temperature, underground temperature, and battery temperature. Furthermore, the controller's signal output terminal can also be connected to the cooling and heating equipment inside the energy storage compartment 1. When necessary, such as in severe cold seasons, when the energy storage compartment 1 is lowered to the insulation position below ground level and still cannot reach a suitable temperature, the controller can control the heating equipment to start active heating to enhance the insulation effect. For example, when the ambient temperature sensor 5 detects that the ambient temperature is -10℃ and the underground temperature is 2℃, the controller can control the traction mechanism 4 to drive the energy storage compartment 1 to descend to the underground insulated position. After the energy storage compartment 1 descends underground, because the battery 2 inside it generates heat, the rate of heat loss will be greatly reduced after entering the underground. In addition, the underground soil has a good insulation effect and its temperature is higher than that of the ground. After observing for a period of time, such as 1 hour, the battery temperature sensor 7 can detect whether the internal temperature of the energy storage compartment 1 has risen to a suitable temperature, such as 20℃. If it has not risen to a suitable temperature, the heating equipment is started to actively heat it. If it has risen to a suitable temperature, the active heating is stopped.

[0032] Furthermore, to improve the insulation effect at the lower end of the protective box 3, an insulation partition 8 is horizontally slidably installed on the side of the protective box 3, and insulation boards 9 are fixedly installed on the lower side and bottom of the protective box 3. The insulation partition 8 and insulation boards 9 can be common external wall insulation board structures on the market. The insulation partition 8 is used to move to the top of the energy storage compartment 1 when the energy storage compartment 1 enters the bottom of the protective box 3, so as to seal the energy storage compartment 1 below the ground. Specifically, the lower side of the protective box 3 has an integrally formed cavity for temporarily storing the insulation partition 8. The cavity allows the insulation partition 8 to be stored without affecting the vertical movement of the energy storage compartment 1. A horizontally positioned second electric push rod 18 is fixed in the cavity. The signal input end of the second electric push rod 18 is connected to the signal output end of the controller, and the telescopic end of the second electric push rod 18 is fixedly connected to one end of the insulation partition 8. When the telescopic end of the second electric push rod 18 extends or retracts, it can drive the insulation partition 8 to slide in the cavity and move to the inside of the protective box 3, thus relatively sealing and isolating the energy storage compartment 1 at the bottom of the protective box 3.

[0033] Understandably, when the energy storage compartment 1 enters the insulation position for insulation, the internal temperature of the energy storage compartment 1 will gradually rise, which may exceed the optimal operating temperature of the battery 2. When the battery temperature sensor 7 detects that the temperature of the battery 2 exceeds the threshold, such as 25°C, the controller can control the first electric push rod 17 to retract, causing the baffle 16 to move downward and open the external window 15. The controller can also control the second electric push rod 18 to retract, causing the insulation partition 8 to move horizontally a distance, such as 30cm, thereby forming a heat dissipation channel between the top of the energy storage compartment 1 and the inner wall of the protective box 3. Since the side of the energy storage compartment 1 is provided with an internal window 14, the hot air inside the energy storage compartment 1 enters the interior of the protective box 3 through the internal window 14 and then escapes upward through the heat dissipation channel. Meanwhile, the low-temperature air outside the protective box 3 enters the interior of the protective box 3 through the external window 15. By utilizing the temperature difference of the natural environment, an effective air convection (chimney effect) is formed, achieving passive cooling of the energy storage compartment 1. When the battery temperature sensor 7 detects that the battery 2 has cooled down to a suitable temperature, the controller receives a signal to control the second electric push rod 18 and the first electric push rod 17 to move in opposite directions, closing the baffle 16 and the insulation partition 8, and restoring the underground insulation state.

[0034] like Figure 5 As shown, a vertical guide rail 10 is embedded and fixed in the inner wall of the protective box 3, and a sliding guide block 11 is fixed on the side of the energy storage compartment 1, which slides in cooperation with the vertical guide rail 10. Through the sliding cooperation between the sliding guide block 11 and the vertical guide rail 10, the lifting and lowering of the energy storage compartment 1 is guided, making the movement of the energy storage compartment 1 smoother. Specifically, the vertical guide rail 10 is embedded and installed in the inner wall of the energy storage compartment 1. In this way, when the energy storage compartment 1 descends to the lower end of the protective box 3, the thermal insulation partition 8 will not be interfered with by the vertical guide rail 10 when it moves horizontally into the interior of the protective box 3.

[0035] like Figure 2 and Figure 5 As shown, the protective box is equipped with a limiting mechanism 12 for supporting the energy storage compartment 1. The limiting mechanism 12 includes a third electric push rod 121 fixed to the outer side of the protective box 3. The signal input end of the third electric push rod 121 is electrically connected to the signal output end of the controller, and a support plate 122 is fixed to the telescopic end of the third electric push rod 121. The other end of the support plate 122 connected to the third electric push rod 121 extends into the interior of the protective box 3. With the setting of the limiting mechanism 12, when the energy storage compartment 1 is moved to the top of the protective box 3, the controller can control the third electric push rod 121 to extend. The third electric push rod 121 drives the support plate 122 to extend into the interior of the protective box 3 and support the bottom of the energy storage compartment 1, so that the energy storage compartment 1 can be stably placed at the top of the interior of the protective box 3.

[0036] like Figure 1 and Figure 2 As shown, the wiring harness (including the controller's wiring harness) inside the energy storage compartment 1, used for connecting to the external cable 19, is assembled in a cable drag chain 13. The lower end of the energy storage compartment 1 is fixedly connected to one end of the drag chain 13, and the other end of the drag chain 13 is fixedly connected to the inner wall of the protective box 3. When the energy storage compartment 1 moves up and down, the drag chain 13 bends and extends synchronously, effectively protecting the wiring harness from damage. It is understood that the motor 41 of the traction mechanism 4, the first electric push rod 17, the ambient temperature sensor 5, the underground temperature sensor 6, and the second electric push rod 18 can all be powered through the external cable 19. The circuit connections adopt conventional connection methods in the prior art and will not be detailed here.

[0037] The core principle of this invention, a battery insulation system for extremely cold regions, lies in utilizing the natural constant temperature characteristics of underground soil for passive insulation, thereby significantly reducing the energy consumption of battery thermal management. When the ambient temperature is too low due to extreme cold, the controller can activate the traction mechanism 4 to lower the energy storage chamber 1 containing the battery 2 to an underground insulation position. The relatively stable and higher underground temperature is used to insulate the battery 2, and the heating equipment inside the energy storage chamber 1 can be activated for auxiliary heating when needed. When the temperature of the energy storage chamber 1 rises above a threshold, the controller can activate the second electric push rod 18 and the first electric push rod 17 to open the baffle 16 of the external window 15 and the insulation partition 8. The chimney effect is used to accelerate the heat exchange between the hot air inside the energy storage chamber 1 and the cold air in the environment, achieving passive cooling and saving electricity. When the ambient temperature rises and heat dissipation or normal operation is required, the controller can activate the traction mechanism 4 to drive the energy storage chamber 1 to a ground-level heat dissipation position, using the natural environment or the cooling equipment inside the energy storage chamber 1 for temperature regulation. By adopting this "underground heating and above-ground heat dissipation" lifting mode, compared with the existing technology of directly setting the energy storage compartment 1 on the ground, the dependence of the energy storage compartment 1 on active heating equipment under extreme low temperatures is minimized, thereby achieving energy-saving and efficient thermal management.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] The above descriptions are merely embodiments of the present invention. Common knowledge such as specific structures and characteristics known in the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the technical field to which the invention pertains before the application date or priority date, are able to obtain all prior art in the field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can improve and implement the solution based on the inspiration given in this application and their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application.

[0040] It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this invention, and these should also be considered within the scope of protection of this invention. These modifications and improvements will not affect the effectiveness of the invention or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A battery thermal retention system for use in cold climates, comprising: The application relates to a temperature-adjusting energy storage cabin, which comprises the following parts: an energy storage cabin (1) for containing a battery (2); a protective box (3) for containing the energy storage cabin (1), the lower end of the protective box (3) is buried below the ground to form a heat preservation position, and the upper part of the protective box (3) is exposed to the ground to form a heat dissipation position; a traction mechanism (4) connected between the protective box (3) and the energy storage cabin (1), which is used for driving the energy storage cabin (1) to move between the heat preservation position and the heat dissipation position of the protective box (3); a temperature sensing unit for detecting the environment temperature, the underground temperature and the battery temperature; and a controller which is electrically connected with the temperature sensing unit and the traction mechanism (4) and is configured to control the traction mechanism (4) to move the energy storage cabin (1) to the heat preservation position or the heat dissipation position according to the environment temperature, the underground temperature and the battery temperature. The inside of the energy storage cabin (1) is provided with a temperature adjusting device which is electrically connected with the controller.

2. The battery thermal protection device for use in cold regions according to claim 1, wherein The temperature adjusting device comprises an active air cooling device.

3. The battery thermal protection device for use in cold regions according to claim 2, wherein The side of the energy storage cabin (1) is provided with an internal window (14), the upper end side of the protective box (3) is provided with an external window (15) which can be opened and closed and corresponds to the internal window, the side lower end of the external window (15) is movably provided with a baffle (16) through a first electric push rod (17), and the signal input end of the first electric push rod (17) is electrically connected with the signal output end of the controller. The temperature sensing unit comprises an environment temperature sensor (5), an underground temperature sensor (6) and a battery temperature sensor (7), the environment temperature sensor (5) is arranged on the upper end outside of the protective box (3) and is used for acquiring the temperature above the ground surface, the underground temperature sensor (6) is arranged on the lower end outside of the protective box (3) and is used for acquiring the temperature below the ground surface, and the battery temperature sensor (7) is arranged in the energy storage cabin (1) and is used for acquiring the environment temperature of the battery (2).

4. The battery thermal protection device for use in cold regions according to claim 3, wherein The side of the protective box (3) is horizontally slidably provided with a heat preservation partition plate (8), the heat preservation partition plate (8) is used for moving to the top of the energy storage cabin (1) when the energy storage cabin (1) enters the bottom of the protective box (3).

5. A battery thermal protection device for use in cold climates as defined in claim 4, wherein The lower end side and the bottom of the protective box (3) are fixedly provided with heat preservation plates (9). The lower end side of the protective box (3) is integrally formed with a cavity for temporarily storing the heat preservation partition plate (8), the cavity is fixedly provided with a second electric push rod (18), the signal input end of the second electric push rod (18) is connected with the signal output end of the controller, and the telescopic end of the second electric push rod (18) is fixedly connected with one end of the heat preservation partition plate (8).

6. A battery thermal protection device for use in cold climates as defined in claim 5, wherein, The traction mechanism (4) comprises a motor (41) fixed on the upper end inside of the protective box (3), the output shaft of the motor (41) is fixedly provided with a steel cable wheel (42), one end of a steel cable (43) is connected with the steel cable wheel (42), and the other end of the steel cable (43) is fixedly connected with the top of the energy storage cabin (1).

7. A battery insulation device for use in frigid regions as described in claim 1, characterized in that, The inner wall of the protective box (3) is fixedly provided with a vertical guide rail (10), and the side of the energy storage cabin (1) is fixedly provided with a sliding guide block (11) which is slidably matched with the vertical guide rail (10). ​ 8. The battery thermal protection device for use in cold regions as claimed in claim 7, wherein The protection box (3) is provided with a limiting mechanism (12) for supporting the energy storage cabin (1), the limiting mechanism (12) comprises a third electric push rod (121) fixed on the side of the protection box (3), the telescopic end of the third electric push rod (121) is fixed with a supporting plate (122), and the other end connected with the third electric push rod (11) penetrates into the interior of the protection box (3).

9. The battery thermal protection device for use in cold regions as claimed in claim 1, wherein One end of the energy storage cabin (1) is fixedly connected with the drag chain (13), and the other end of the drag chain (13) is fixedly connected with the inner wall of the protection box (3).

Images