Battery device, electric device, and battery swap station

Abstract

The application discloses a battery device, an electric device and a battery swap station. The battery device comprises a battery box, a battery monomer assembly and a heat pipe. The battery monomer assembly is arranged in the battery box and comprises a plurality of battery monomers. The heat pipe is arranged in the battery box and is provided with a closed medium cavity, and working medium is arranged in the medium cavity. The heat pipe comprises an evaporation section and a condensation section which are connected in communication. The evaporation section is arranged in heat exchange connection with at least two battery monomers. At least part of the battery box is formed into a heat exchange box wall. The condensation section is arranged in heat exchange connection with the heat exchange box wall and is arranged in space with the battery monomers. The outside of at least the evaporation section of the heat pipe is provided with an insulation structure. The technical scheme can improve the reliability of the battery device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device, electrical equipment, and battery swapping station. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] Improving the reliability of battery devices is a pressing issue in battery technology. Utility Model Content

[0004] The main objective of this application is to provide a battery device, electrical equipment, and battery swapping station, which aims to improve the reliability of the battery device.

[0005] To achieve the above objectives, the battery device proposed in this application includes:

[0006] Battery box;

[0007] Battery cell assembly, the battery cell assembly is located inside the battery box, and the battery cell assembly includes multiple battery cells; and

[0008] The heat pipe is located inside the battery compartment and has a closed medium cavity containing a working medium.

[0009] The heat pipe includes an evaporation section and a condensation section that are connected to each other, and the evaporation section is connected to at least two battery cells in a heat exchange configuration.

[0010] At least a portion of the battery box is formed as a heat exchange box wall, and the condensation section is heat-exchange connected to the heat exchange box wall and spaced apart from the battery cells.

[0011] The heat pipe has an insulating structure on the outside of at least the evaporation section.

[0012] The battery device in this application includes a heat pipe installed inside the battery box. The evaporation section of the heat pipe is heat-exchange connected to the individual battery cells, while the condensation section is heat-exchange connected to the heat exchange box wall and spaced apart from the individual battery cells. During operation, the heat generated by the individual battery cells is transferred to the evaporation section of the heat pipe, allowing the working medium within to absorb heat and vaporize. This vaporization carries the heat to the relatively cooler condensation section for exothermic condensation, effectively transferring the heat generated by the individual battery cells to the heat exchange box wall for dissipation to the outside of the battery device. After exothermic condensation, the working medium can flow back to the evaporation section under capillary force and / or gravity, achieving circulation within the heat pipe. This ensures the heat pipe continuously conducts the heat generated by the individual battery cells to the heat exchange box wall for dissipation to the outside of the battery device, better meeting the cooling requirements of the battery device. Meanwhile, the evaporation section of the heat pipe is also connected to at least two battery cells for heat exchange. This allows the heat pipe to transfer heat from relatively hot battery cells to relatively cooler ones, thereby achieving temperature equalization for all battery cells. In other words, the heat pipe can perform both cooling and temperature equalization functions, ensuring that each battery cell can operate normally and stably within a suitable temperature range.

[0013] Moreover, the medium chamber inside the heat pipe is closed, which avoids the situation where the liquid cooling plate in the battery box needs to circulate coolant with the external electrical equipment, unlike in traditional battery boxes. There is no risk that the type of coolant used when adding coolant may be different from the original coolant in the liquid cooling plate, which could cause the different types of coolant to mix and react, corrode the liquid cooling plate, cause coolant leakage, and lead to insulation failure.

[0014] Therefore, the battery device structure in this design, through the heat pipe, enables the individual battery cells to operate normally and stably within a suitable temperature range. Furthermore, the heat pipe itself, due to its enclosed structure, also operates normally and stably, reducing the risk of insulation failure. This combination of stable operation of the individual battery cells and the heat pipe improves the reliability of the battery device. Moreover, an insulating structure is provided on at least the outer side of the evaporation section of the heat pipe. This insulating structure provides insulation protection for both the heat pipe and the individual battery cells, further enhancing the reliability of the battery device.

[0015] In some embodiments, the condensation section is arranged in contact with the heat exchanger box wall;

[0016] Alternatively, the condensation section is spaced apart from the heat exchange box wall, and the battery device also includes a first thermal interface material layer, which is disposed between the heat exchange box wall and the battery box.

[0017] Therefore, by placing the condensing section in contact with the heat exchange box wall, the heat exchange path between them can be shortened, thereby improving the efficiency of the heat pipe in transferring the heat generated by the battery cells during operation to the heat exchange box wall. The placement of a first thermal interface material layer between the heat exchange box wall and the battery box effectively fills the gap between them. Furthermore, the first thermal interface material layer itself has relatively low thermal resistance, which helps reduce the thermal resistance between the heat exchange box wall and the battery box, thus improving the heat exchange efficiency between the condensing section and the heat exchange box wall.

[0018] In some embodiments, a portion of the surface of the condensing section is formed as a heat exchange wall, which is heat exchanged with the heat exchange box wall. At least a portion of the surface of the condensing section other than the heat exchange wall is provided with a plurality of first fins.

[0019] Therefore, by setting the first fin, the contact area with the air can be increased, which in turn helps to improve the heat exchange efficiency of the condensation section.

[0020] In some embodiments, the condensation section has a first surface and a second surface disposed opposite to each other, the first surface being formed as a heat exchange wall, and the second surface being provided with a plurality of first fins.

[0021] Therefore, by setting the first surface of the condensing section facing the heat exchange box wall as the heat exchange wall surface, and setting the first fins on the side facing away from the first surface, the structure of the condensing section can be made simpler, which in turn improves the ease of its manufacture.

[0022] In some embodiments, the battery box is provided with a heat dissipation duct, the heat exchange box wall encloses to form at least a portion of the heat dissipation duct, and at least a portion of the condensation section is disposed within the heat dissipation duct.

[0023] This allows the condensing section to not only exchange heat with the heat exchange box wall, but also to dissipate heat through the airflow in the heat dissipation duct, thereby improving the heat dissipation efficiency of the condensing section.

[0024] In some embodiments, the battery device further includes an enclosure plate disposed inside the battery box and enclosing the heat exchange box wall to form a heat dissipation duct.

[0025] Therefore, by using the enclosure plate and the heat exchange box wall to form a heat dissipation air duct, the structure of the heat exchange box wall can be simplified, and the required strength can be maintained.

[0026] In some embodiments, the heat exchange box wall is provided with a plurality of second fins, which are located outside the battery box.

[0027] Therefore, by setting a second fin, the heat exchange area between the heat exchange box wall and the outside of the battery box can be increased, which in turn helps to improve the heat dissipation efficiency of the heat exchange box wall.

[0028] In some embodiments, the battery device further includes a thermal insulation structure, which includes a driving element and a thermal insulation element;

[0029] At least some of the insulation components are located on the heat exchange box wall and outside the battery box;

[0030] The drive unit is located in the battery box and connected to the insulation unit. The drive unit is configured to drive the insulation unit to move in order to open or cover the heat exchange box wall.

[0031] Therefore, when the ambient temperature outside the battery device is relatively low, the insulation component can be moved by the drive component to cover the heat exchange box wall, so as to play a role in heat preservation and reduce the possibility that the temperature of the battery cell will drop too low due to excessive heat dissipation caused by the large temperature difference with the outside.

[0032] In some embodiments, the insulation structure further includes a winding shaft connected to a drive member;

[0033] One end of the insulation component is connected to a winding shaft, which is configured to wind up or unwind the insulation component, so that the insulation component has a wound state and an unfolded state.

[0034] In the coiled state, the insulation component opens the heat exchange box wall; in the unfolded state, the insulation component covers the heat exchange box wall.

[0035] Therefore, by setting the insulation component to open or cover the heat exchange box wall through the rotation of the winding shaft, the insulation component will not occupy too much space during movement, thus facilitating the installation and arrangement of the insulation structure in a limited space.

[0036] In some embodiments, the battery device further includes a heating structure disposed inside the battery case and spaced apart from the heat pipe, the heating structure being configured to heat individual battery cells.

[0037] Therefore, when the ambient temperature outside the battery device is relatively low, the heating structure can be activated to heat the battery cells, reducing the possibility that the temperature of the battery cells will drop too low due to excessive heat loss caused by a large temperature difference with the outside environment.

[0038] In some embodiments, the heating structure and the heat pipe are located on different walls of the battery box;

[0039] And / or, the heating structure is a resistance heater or a PTC heater;

[0040] And / or, the battery device also includes a temperature sensor located inside the battery compartment and electrically connected to the heating structure.

[0041] Therefore, placing the heating structure and heat pipe on different walls of the battery compartment increases the distance between them, reducing the possibility of the heating structure affecting the working medium inside the heat pipe during operation. Using a resistance heater or PTC heater for the heating structure simplifies its design and facilitates its installation within the battery compartment. Temperature sensors can monitor the temperature inside the battery compartment, allowing for timely activation of the heating structure to heat the individual battery cells when the temperature is low.

[0042] In some embodiments, the evaporation section is disposed on at least one side of the battery cell assembly, and the evaporation section is provided with a plurality of third fins, each third fin being located between two adjacent battery cells.

[0043] Therefore, a third fin is provided on the evaporation section, extending between two adjacent battery cells, which increases the heat exchange area between the evaporation section and the battery cells, thereby improving the heat exchange efficiency between the evaporation section and the battery cells.

[0044] In some embodiments, a battery cell has a first end face and a second end face opposite to each other, and a side peripheral face connecting the first end face and the second end face;

[0045] The first end face is provided with a pole post, and the side circumferential surface includes two opposite large surfaces and two opposite small surfaces;

[0046] The evaporation section is connected to the second end face or small face in a heat exchange configuration, and the third fin is located between two opposing large faces in two adjacent battery cells.

[0047] Therefore, by setting the third fin to correspond to the large surface area of ​​the battery cell, it can exchange heat with the large surface area and have a large heat exchange area, which is conducive to further improving the heat exchange efficiency between the evaporation section and the battery cell.

[0048] In some embodiments, the battery device further includes a second thermal interface material layer disposed between the evaporation section and the battery cell.

[0049] Therefore, the second thermal interface material layer located between the evaporation section and the battery cell can effectively fill the gap between the evaporation section and the battery cell, and the thermal resistance of the second thermal interface material layer itself is relatively low, which helps to reduce the thermal resistance between the evaporation section and the battery cell, so as to improve the heat exchange efficiency between the evaporation section and the battery cell.

[0050] In some embodiments, the evaporation section and the condensation section are arranged at an angle.

[0051] Therefore, setting the evaporation section and the condensation section at an angle allows for a more compact distribution between them, which in turn helps to reduce the overall volume of the heat pipe and improves its ease of installation and arrangement within the battery box.

[0052] In some embodiments, the battery box has a first box wall and a second box wall arranged at an angle, and the battery cell has an electrode post on the side facing away from the first box wall.

[0053] The evaporation section is located between the battery cell and the first box wall, the second box wall is formed as the heat exchange box wall, and the condensation section is located between the battery cell and the second box wall.

[0054] Therefore, placing the evaporation section between the battery cell and the first casing wall allows it to be positioned away from the battery cell's electrode post, facilitating the coverage of at least two battery cells, increasing the heat exchange area with the battery cells, and improving the ease of installation and layout of the evaporation section. Conversely, placing the condensation section between the battery cell and the second casing wall allows for an angled arrangement between the condensation and evaporation sections, improving the compactness of the distribution.

[0055] In some embodiments, there is one heat pipe, and the evaporation section is configured to be heat-exchange connected to all the battery cells.

[0056] Alternatively, multiple battery cells are arranged along a first direction to form a battery pack, and the battery device includes at least two battery packs arranged along a second direction, which intersects with the first direction; the number of heat pipes is at least two, and each heat pipe corresponds to one battery pack.

[0057] Therefore, using only one heat pipe significantly reduces the number of heat pipes required, thus simplifying the structure of the battery device. Furthermore, connecting all battery cells to a single heat pipe improves the uniformity of temperature across all cells. Having one heat pipe for each battery pack facilitates targeted replacement and repair in case of damage to different heat pipes, enhancing the convenience of heat pipe maintenance.

[0058] In some embodiments, the heat pipe is a gravity heat pipe;

[0059] And / or, the evaporation section has a plate-like structure;

[0060] And / or, the condensation section has a plate-like structure.

[0061] Therefore, by designing the heat pipe as a gravity heat pipe, the working medium in the condensation section can be driven to flow back to the evaporation section under the influence of gravity, improving the circulation efficiency of the working medium and thus enhancing the heat pipe's thermal conductivity to the battery cells. Designing the evaporation section as a plate structure ensures that the evaporation section and battery cells do not excessively occupy space in the stacking arrangement direction. Similarly, designing the condensation section as a plate structure ensures that the condensation section and battery cells do not excessively occupy space in the stacking arrangement direction.

[0062] In some embodiments, the insulating structure is an insulating coating or an insulating film.

[0063] Therefore, using an insulating coating or insulating film as the insulating structure allows the insulating structure to be firmly fixed to the outside of the heat pipe, so as to play a normal and stable role in insulation and protection; moreover, the insulating coating and insulating film themselves have good insulation properties, which in turn helps to improve the reliability of insulation.

[0064] In some embodiments, the battery does not contain a liquid cooling plate or liquid cooling pipe.

[0065] Therefore, by eliminating the need for liquid cooling plates or pipes inside the battery box and replacing them with heat pipes, the cooling requirements of individual battery cells can be met, while also achieving temperature uniformity among the cells. Furthermore, the heat pipe's internal fluid chamber is sealed, unlike traditional battery boxes where liquid cooling plates require coolant circulation with external electrical equipment. This avoids the risk of adding different types of coolant that could mix and react, corroding the liquid cooling plate, causing leaks, and ultimately leading to insulation failure within the battery unit.

[0066] In some embodiments, the battery device further includes a first radiator, which is disposed outside the battery box and is heat-exchange connected to the heat exchange box wall.

[0067] Therefore, the first radiator can continuously dissipate heat from the heat exchange box wall, which can improve the heat dissipation efficiency of the heat exchange box wall. This will help to accelerate the dissipation of heat transferred from the heat pipe to the heat exchange box wall to the outside of the battery box, thereby improving the cooling efficiency of the battery cells.

[0068] On the other hand, the electrical equipment proposed in this application includes the battery device in any of the above embodiments.

[0069] On the other hand, the battery swapping station proposed in this application is provided with a charging compartment, which is configured to house the battery device in any of the above embodiments; the charging compartment is provided with a heat exchange mechanism, which is configured to be heat-exchange connected to the battery device housed in the charging compartment. Attached Figure Description

[0070] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0071] Figure 1 This is a schematic diagram of the structure of one embodiment of the vehicle of this application;

[0072] Figure 2 This is an exploded structural diagram of an embodiment of the battery device of this application;

[0073] Figure 3 This is an exploded structural diagram of a single battery cell according to an embodiment of this application;

[0074] Figure 4 This is a partial structural schematic diagram of an embodiment of the battery device of this application;

[0075] Figure 5 This is a schematic diagram of the structure of a heat pipe according to an embodiment of this application;

[0076] Figure 6 This is a partial structural schematic diagram of another embodiment of the battery device of this application;

[0077] Figure 7 This is a partial structural schematic diagram of another embodiment of the battery device of this application;

[0078] Figure 8 This is a partial structural schematic diagram of another embodiment of the battery device of this application;

[0079] Figure 9 This is a partial structural schematic diagram of another embodiment of the battery device of this application;

[0080] Figure 10 This is a partial structural schematic diagram of another embodiment of the battery device of this application.

[0081] Explanation of icon numbers:

[0082] 100. Battery assembly; 1. Battery box; 1a. Receptacle; 11. Box cover; 12. Box body; 121. Heat exchange box wall; 1211. Second fin; 122. Heat dissipation duct; 123. Enclosure plate; 124. First box wall; 125. Second box wall; 20A. Battery cell assembly; 20. Battery cell; 21. End cap; 21a. Terminal post; 211. First end face; 22. Shell; 221. Second end face; 223. Side peripheral surface; 2231. Large surface; 2232. Small surface; 23 1. Electrode assembly; 231. Tab; 20B. Battery pack; 30. Heat pipe; 31. Evaporation section; 311. Third fin; 33. Condensation section; 331. Heat exchange wall; 332. First fin; 333. First surface; 334. Second surface; 40. First thermal interface material layer; 50. Insulation structure; 51. Drive component; 53. Insulation component; 55. Rewinding shaft; 60. Heating structure; 70. Second thermal interface material layer; 1000. Vehicle; 200. Controller; 300. Motor.

[0083] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0084] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0085] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0086] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0087] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0088] A battery device, or energy storage device, is widely used not only in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in other fields. A battery device may include a battery box and individual battery cells housed within the battery box. The battery box may include a box body and a cover that fits over the box body to enclose a cavity containing the individual battery cells. The individual battery cell is the smallest unit comprising a battery, typically including a casing and an electrode assembly housed within the casing. The electrode assembly is the component in the individual battery cell where the electrochemical reaction actually occurs, and may include a positive electrode, a negative electrode, and a separator located between them, formed by winding or stacking the positive electrode, negative electrode, and separator. Furthermore, at least two individual battery cells within the battery box may be connected in series, in parallel, or in a hybrid connection including both series and parallel connections.

[0089] Battery devices in related technologies typically use liquid cooling plates within the battery compartment for heat dissipation through liquid cooling circulation. However, this cooling method requires the addition of coolant after a period of use. If the added coolant is of a different type than the original coolant used in the liquid cooling plate, the mixing of these different types of coolant can easily cause a reaction that corrodes the liquid cooling plate, leading to leakage and ultimately causing internal insulation failure in the battery device, thus affecting its normal operation.

[0090] Therefore, based on the above considerations, in order to solve the problem of low reliability of battery devices in related technologies, this application proposes a novel battery device. This battery device innovatively uses a closed heat pipe to replace a liquid cooling plate or liquid cooling pipe, thus avoiding the need for coolant circulation between the liquid cooling plate or liquid cooling pipe in a traditional battery box and external electrical equipment. This prevents the mixing of different types of coolant during coolant addition, which could lead to reactive corrosion of the liquid cooling plate and cause insulation failure, thereby improving the reliability of the battery device.

[0091] Furthermore, it should be noted that the battery device proposed in this application can be applied to electrical devices. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Further, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0092] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0093] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0094] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0095] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a battery case 1 and a battery cell assembly 20A; the battery case 1 has a receiving cavity 1a, and the battery cell assembly 20A is disposed inside the battery case 1.

[0096] The battery box 1 can be used to form a receiving cavity 1a to provide a receiving space for the battery cell assembly 20A. The battery box 1 can adopt various structures. In some embodiments, the battery box 1 can include a cover 11 and a body 12 that overlap each other to jointly define the receiving cavity 1a for receiving the battery cell assembly 20A. In this case, the body 12 can provide receiving and support for the battery cell assembly 20A. In addition, both the cover 11 and the body 12 can be hollow structures with an opening on one side. In this case, the opening side of the cover 11 can cover the opening side of the body 12. Of course, the cover 11 can also be a plate structure and cover the opening side of the body 12. In addition, the battery box 1 formed by the cover 11 and the body 12 can be of various shapes, such as a cylinder, a cuboid, etc. Furthermore, the cover 11 and the body 12 can be arranged along a first direction.

[0097] The battery cell assembly 20A may include multiple battery cells 20, where each battery cell 20 is the smallest unit constituting the battery device 100. These multiple battery cells 20 may be connected in series, in parallel, or in a mixed configuration, where some battery cells 20 are connected in series and others in parallel. Furthermore, multiple battery cells 20 may be arranged in one direction to form a battery pack 20B. The battery cell assembly 20A may be constructed as a single battery pack 20B, or it may be constructed as at least two battery packs 20B arranged side-by-side.

[0098] In addition, the battery device 100 may include other structures, such as busbars, for electrical connection between multiple battery cells 20. Furthermore, each battery cell 20 may be a secondary or primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, cuboid, or other shapes.

[0099] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0100] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, giving battery cell 20 higher structural strength and improved safety performance. Functional components such as terminals 21a can be provided on end cap 21. Terminals 21a can be used to electrically connect to electrode assembly 23 for outputting or inputting electrical energy into battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0101] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0102] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 231. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs 231 connect to the terminals 21a to form a current circuit.

[0103] Please refer to the reference. Figure 2 , Figure 4 as well as Figure 5 In one embodiment of this application, the battery device 100 further includes a heat pipe 30, which is disposed inside the battery case 1. The heat pipe 30 has a closed medium cavity containing a working medium. The heat pipe 30 includes an evaporation section 31 and a condensation section 33 that are connected to each other. The evaporation section 31 is heat-exchange connected to at least two battery cells 20. At least a portion of the battery case 1 is formed as a heat exchange box wall 121. The condensation section 33 is heat-exchange connected to the heat exchange box wall 121 and is spaced apart from the battery cells 20.

[0104] The heat pipe 30 is a heat transfer element with extremely high thermal conductivity. It transfers heat through the evaporation and condensation phase change of the working medium within a fully enclosed vacuum tube, utilizing capillary action or gravity to drive the flow of the working medium and form a circulation path. For example, when the heat pipe 30 is a capillary heat pipe, it can drive the flow of the working medium through capillary action to form a circulation path; when it is a gravity heat pipe, it can drive the flow of the working medium through gravity to form a circulation path; and further, when a wick is provided inside the gravity heat pipe 30, it can drive the flow of the working medium through both gravity and capillary action to form a circulation path. It should be noted that this application does not limit the type of heat pipe 30. Furthermore, since the working principle of the heat pipe 30 is prior art, its specific internal structure will not be described in detail here.

[0105] The medium cavity can be used to contain the working medium of the heat pipe 30. A portion of the medium cavity can be distributed in the evaporation section 31 of the heat pipe 30, and a portion can be distributed in the condensation section 33 of the heat pipe 30. The medium cavity located in the evaporation section 31 is connected to the medium cavity located in the condensation section 33. Furthermore, the cross-section of the medium cavity can be rectangular, trapezoidal, or circular; this application does not limit the shape of the medium cavity.

[0106] The working medium serves as the core carrier for achieving efficient phase change heat transfer. For example, the working medium located in the evaporation section 31 can vaporize after absorbing heat from the battery cell 20, resulting in a higher vapor pressure in the evaporation section 31 than in the condensation section 33. Driven by this pressure difference, the heat-carrying vapor flows from the evaporation section 31 to the relatively lower-temperature condensation section 33, where it undergoes exothermic condensation, thus transferring the heat generated by the battery cell 20 during operation to the condensation section 33. The condensed liquid working medium can then flow back to the evaporation section 31 under capillary force and / or gravity, achieving circulation of the working medium within the heat pipe 30. Alternatively, the working medium can be ammonia to better cover the operating temperature of the battery cell 20. Of course, the working medium can also be alcohol; this application does not limit the type of working medium.

[0107] The evaporation section 31 can be configured for heat exchange connection with the battery cell 20. The heat exchange connection proposed in this application refers to the connection between the two entities allowing for heat exchange, including direct contact and indirect exchange via air or other objects. Therefore, the evaporation section 31 and the battery cell 20 can be in contact or spaced apart. Furthermore, the evaporation section 31 can be configured for heat exchange with some or all of the battery cells 20 in the battery cell assembly 20A. Additionally, the evaporation section 31 can be a plate-like structure to provide a larger heat exchange area with the battery cell 20 in the thickness direction, improving heat exchange efficiency. Of course, the evaporation section 31 can also be a tubular structure; this application does not limit the shape of the evaporation section 31. Additionally, the evaporation section 31 can be located on the side of the battery cell assembly 20A opposite to the terminal post 21a. For example, when the terminal post 21a of the battery cell 20 is facing the cover 11 of the battery case 1, the evaporation section 31 can be located between the side of the battery cell assembly 20A opposite to the cover 11 and the case 12. Of course, the evaporation section 31 can also be located on the side of the battery cell assembly 20A with the terminal post 21a, or it can be located on the side of the battery cell 20 adjacent to the terminal post 21a. Alternatively, the evaporation section 31 can be located on at least both sides of the battery cell assembly. When the evaporation section 31 is located on at least both sides of the battery cell assembly 20A, and the number of heat pipes 30 is one, the number of evaporation sections 31 can be at least two, so that they can be located on at least both sides of the battery cell assembly 20A. For example, the number of evaporation sections 31 can be two, arranged at relative intervals, to be distributed on both sides of the battery cell assembly 20A. When the evaporation section 31 is disposed on at least both sides of the battery cell assembly 20A, and the number of heat pipes 30 is at least two, the evaporation sections 31 of different heat pipes 30 can be disposed on at least both sides of the battery cell assembly 20A respectively. Therefore, this application does not limit the number or location of the evaporation sections 31.

[0108] The condensing section 33 can be heat-exchange connected to the heat exchange box wall 121. The condensing section 33 and the heat exchange box wall 121 can be in contact or spaced apart. Furthermore, the condensing section 33 can be a plate-like structure to provide a larger heat exchange area with the heat exchange box wall 121 in the thickness direction, thereby improving the heat exchange efficiency. Alternatively, the condensing section 33 can be a tubular structure; this application does not limit the shape of the condensing section 33. In addition, the condensing section 33 and the evaporating section 31 can be located on the same side of the battery cell assembly 20A. In this case, the condensing section 33 and the evaporating section 31 can be formed as a flat plate structure. Alternatively, the condensing section 33 and the evaporating section 31 can be located on different sides of the battery cell assembly 20A. For example, when there is one condensing section 33, and it and the evaporating section 31 are located on adjacent sides of the battery cell assembly 20A, the condensing section 33 and the evaporating section 31 can be formed as an L-shaped structure. Alternatively, if there are two condensation sections 33 arranged at relative intervals, and each condensation section 33 and evaporation section 31 are located on adjacent sides of the battery cell assembly 20A, the condensation section 33 and evaporation section 31 can form a U-shaped structure. Therefore, this application does not limit the overall shape type of the heat pipe 30.

[0109] The heat exchange box wall 121 can be formed by the opposing walls of the battery box 1 and the condensing section 33. The heat exchange box wall 121 can be formed by a single wall, or at least two walls, depending on the number of condensing sections 33. For example, when the condensing section 33 and the evaporating section 31 are formed in a flat or L-shaped structure as described above, the heat exchange box wall 121 can be formed by one wall of the battery box 1 opposite to the condensing section 33. When the condensing section 33 and the evaporating section 31 are formed in a flat or U-shaped structure as described above, the heat exchange box wall 121 can be formed by two walls of the battery box 1, each opposite to one of the two condensing sections 33. The heat exchange box wall 121 can be located on the body 12 of the battery box 1, or on the cover 11 of the battery box 1, depending on the location of the condensing sections 33 within the battery box 1. For example, when the terminal post 21a of the battery cell 20 faces the cover 11, and the condensation section 33 is located on the side of the battery cell 20 adjacent to the terminal post 21a, the heat exchange box wall 121 can be installed on the casing 12 of the battery box 1. Furthermore, the heat exchange box wall 121 can exchange heat with the external environment of the battery device 100, thereby dissipating the heat transferred from the heat pipe 30 to the outside of the battery device 100.

[0110] In addition, the number of heat pipes 30 can be one. Of course, the number of heat pipes 30 can also be at least two, with each heat pipe 30 corresponding to one battery pack 20B setting.

[0111] The battery device 100 of this application includes a heat pipe 30 installed inside the battery box 1. The evaporation section 31 of the heat pipe 30 is heat-exchange connected to the battery cell 20, while the condensation section 33 of the heat pipe 30 is heat-exchange connected to the heat exchange box wall 121 and spaced apart from the battery cell 20. In this configuration, the heat generated by the battery cell 20 during operation can be transferred to the evaporation section 31 of the heat pipe 30, allowing the working medium within the evaporation section 31 to absorb heat and vaporize. This vaporization carries heat to the relatively cooler condensation section 33 for exothermic condensation, thus transferring the heat generated by the battery cell 20 during operation to the heat exchange box wall 121 for heat dissipation to the outside of the battery device 100. After the working medium condenses and releases heat, it can flow back to the evaporation section 31 under capillary force and / or gravity, realizing the circulation of the working medium within the heat pipe 30. This allows the heat pipe 30 to continuously conduct the heat generated by the battery cell 20 during operation to the heat exchange box wall 121 for heat dissipation to the outside of the battery device 100, better meeting the cooling requirements of the battery device 100. Simultaneously, the evaporation section 31 of the heat pipe 30 is also connected to at least two battery cells 20 for heat exchange, enabling the heat pipe 30 to transfer the temperature of the relatively higher-temperature battery cell 20 to the relatively lower-temperature battery cell 20, thereby achieving temperature equalization for all battery cells 20. In other words, the heat pipe 30 can simultaneously perform cooling and temperature equalization functions, ensuring that each battery cell 20 can operate normally and stably within a suitable temperature range.

[0112] Moreover, the medium chamber inside the heat pipe 30 is still closed, so that unlike the liquid cooling plate in the battery box 1 in the traditional case, which needs to circulate coolant with external electrical equipment, there is no risk that when adding coolant, the type of coolant used may be different from the original coolant in the liquid cooling plate, which may cause the different types of coolant to mix and react, corrode the liquid cooling plate, cause coolant leakage, and cause internal insulation failure of the battery device 100.

[0113] Therefore, the structure of the battery device 100 in this solution allows the battery cell 20 to operate normally and stably within a suitable temperature range through the heat pipe 30. Furthermore, the heat pipe 30 itself can also operate normally and stably due to its closed structure, thus reducing the risk of insulation failure. In turn, the stable operation of the battery cell 20 and the stable operation of the heat pipe 30 work together to improve the reliability of the battery device 100.

[0114] Furthermore, this design eliminates the need for an external coolant circulation structure connected to the liquid cooling plate or pipes inside the battery pack 1, as is common in traditional designs. The heat pipe 30 itself also has a simpler structure, further simplifying the structural design of the battery pack 100 and the vehicle 1000 and improving manufacturing convenience. Simultaneously, it facilitates the removal of the battery pack 100 from the vehicle 1000 for charging at a battery swapping station, enhancing its usability.

[0115] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the condensation section 33 is spaced apart from the heat exchange box wall 121, and the battery device 100 further includes a first thermal interface material layer 40, which is disposed between the heat exchange box wall 121 and the battery box 1.

[0116] Thermal interface material (TIM) is a general term for materials used to reduce the contact thermal resistance between two heat exchange components. These materials can include thermal grease, thermal pads, or thermal adhesives.

[0117] In this embodiment, a first thermal interface material layer 40 is provided between the heat exchange box wall 121 and the battery box 1, which can better fill the gap between the heat exchange box wall 121 and the battery box 1. The first thermal interface material layer 40 itself has a relatively low thermal resistance, which helps to reduce the thermal resistance between the heat exchange box wall 121 and the battery box 1, so as to improve the heat exchange efficiency between the condensation section 33 and the heat exchange box wall 121, and thus improve the cooling efficiency of the battery cell 20.

[0118] Of course, this application is not limited to this. In one embodiment of this application, the condensation section 33 is arranged in contact with the heat exchange box wall 121.

[0119] The contact mentioned in this application includes both abutting fit between the two contacting parts and connection fit between the two contacting parts through any connection method such as adhesive connection or threaded connection. Therefore, the condensing section 33 and the heat exchange box wall 121 can be configured to abutting fit, or they can be configured to be connected by a connection method such as adhesive connection.

[0120] In this embodiment, the condensation section 33 is set to contact the heat exchange box wall 121, which can shorten the heat exchange path between the two, thereby improving the efficiency of the heat pipe 30 in transferring the heat generated by the battery cell 20 during operation to the heat exchange box wall 121, so as to improve the cooling efficiency of the battery cell 20.

[0121] Please refer to Figure 6In one embodiment of this application, a portion of the surface of the condensing section 33 is formed as a heat exchange wall 331, which is heat exchanged and connected to the heat exchange box wall 121. At least a portion of the surface of the condensing section 33 other than the heat exchange wall 331 is provided with a plurality of first fins 332.

[0122] The heat exchange wall surface 331 can be formed from one surface of the condensing section 33. For example, when the condensing section 33 is disposed on the surface of the heat exchange box wall 121, the heat exchange wall surface 331 can be formed from the surface of the condensing section 33 opposite to the heat exchange box wall 121, that is, from the first surface 333 described below. Of course, the heat exchange wall surface 331 can also be formed from two or more surfaces of the condensing section 33. For example, when the condensing section 33 is embedded in the surface of the heat exchange box wall 121, the heat exchange wall surface 331 can be formed from the first surface 333 and a third surface adjacent to the first surface 333. The fact that at least a portion of the surfaces of the condensing section 33 other than the heat exchange wall surface 331 are provided with a plurality of first fins 332 means that the first fins 332 can be disposed only on the side of the condensing section 33 facing away from the heat exchange box wall 121, that is, on the second surface 334 described below. Of course, when the heat exchange wall 331 is formed only by the first surface 333, the first fin 332 can be further disposed on the third surface in addition to being disposed on the second surface 334; or it can be disposed only on the third surface, ensuring that the arrangement of the first fin 332 does not affect the heat exchange connection between the condensing section 33 and the heat exchange box wall 121. The first fin 332 can be arranged in one direction to form a fin group, or there can be two or more fin groups arranged side by side.

[0123] In this embodiment, a first fin 332 is provided on the condensation section 33, which can increase the contact area with air, thereby improving the heat exchange efficiency of the condensation section 33 and thus improving the cooling efficiency of the battery cell 20.

[0124] Please refer to Figure 6 In one embodiment of this application, the condensation section 33 has a first surface 333 and a second surface 334 disposed opposite to each other. The first surface 333 is formed as a heat exchange wall 331, and the second surface 334 is provided with a plurality of first fins 332.

[0125] The first surface 333 is disposed opposite to the heat exchange box wall 121, and can be disposed in contact with it or at a distance, with a first thermal interface material layer 40 disposed between them as described above. The second surface 334 can be disposed opposite to the first surface 333. For example, when the condensing section 33 has a plate-like structure, the first surface 333 and the second surface 334 can be two surfaces along the thickness direction of the condensing section 33. In addition, the condensing section 33 can also have a third surface connecting the first surface 333 and the second surface 334. Furthermore, when the condensing section 33 and the evaporating section 31 are located on the same side of the battery cell assembly 20A as described above, and the heat pipe 30 is formed as a flat plate structure, the first surface 333 can be flush with one surface of the evaporating section 31, and the second surface 334 can be flush with the other surface of the evaporating section 31. When the condensing section 33 and the evaporating section 31 are located on adjacent sides of the battery cell assembly 20A as described above, so that the heat pipe 30 is formed into an L-shaped structure, the evaporating section 31 can be located on the side facing the second surface 334.

[0126] In this embodiment, the first surface 333 of the condensing section 33 facing the heat exchange box wall 121 is set as the heat exchange wall surface 331, while the first fin 332 is set on the side facing away from the first surface 333. This makes the structure of the condensing section 33 simpler, which in turn improves the ease of its manufacture.

[0127] Please refer to Figure 7 In one embodiment of this application, the battery box 1 is provided with a heat dissipation duct 122, and the heat exchange box wall 121 surrounds and forms at least a portion of the heat dissipation duct 122. At least a portion of the condensation section 33 is disposed within the heat dissipation duct 122.

[0128] The fact that at least a portion of the heat exchanger wall 121 encloses to form the heat dissipation duct 122 refers to the portion of the heat exchanger wall 121 that forms the heat dissipation duct 122, for example, as described below, where the heat exchanger wall 121 and the enclosing plate 123 jointly enclose the heat dissipation duct 122. Alternatively, the heat dissipation duct 122 can be formed by enclosing only one of the heat exchanger wall 121, for example, by creating a channel within the heat exchanger wall 121 to form the heat dissipation duct 122. Furthermore, the heat dissipation duct 122 can extend along opposite sides of the heat exchanger wall 121, for example, along the second direction described below, to make the shape of the heat dissipation duct 122 simpler and easier to install. Of course, in other embodiments, the heat dissipation duct 122 can also extend in other ways, or be designed as an arc; this application does not limit the extension shape of the heat dissipation duct 122. In addition, both ends of the heat dissipation duct 122 can be provided with air duct openings for the entry and exit of external airflow. The air duct inlet and outlet can be located on the heat exchange box wall 121, or on other walls of the battery box 1. Additionally, to improve airflow, a fan is installed inside the heat dissipation duct 122 to drive the airflow.

[0129] At least a portion of the condensing section 33 is located within the heat dissipation duct 122, meaning that a portion of the condensing section 33 can be extended into the heat dissipation duct 122, or the entire condensing section 33 can be extended into the heat dissipation duct 122.

[0130] In this embodiment, a heat dissipation duct 122 is provided inside the battery box 1, and at least a portion of the heat dissipation duct 122 is formed by the heat exchange box wall 121. This allows the condensing section 33 to exchange heat with the heat exchange box wall 121 and further dissipate heat through the airflow in the heat dissipation duct 122, thereby improving the heat dissipation efficiency of the condensing section 33 and thus improving the cooling effect on the battery cell 20.

[0131] In addition, the first fin 332 can be disposed on the condensation section 33 located in the heat dissipation duct 122, so as to increase the heat exchange area with the heat dissipation airflow through the first fin 332, thereby further improving the heat dissipation efficiency of the condensation section 33.

[0132] Please refer to Figure 7 In one embodiment of this application, the battery device 100 further includes a surrounding plate 123, which is disposed inside the battery box 1 and surrounds the heat exchange box wall 121 to form a heat dissipation duct 122.

[0133] The enclosure plate 123 can be a cover structure with an opening on one side, covering the heat exchange box wall 121. In addition, the enclosure plate 123 and the heat exchange box wall 121 can be connected by welding, threaded connection or adhesive connection, etc. This application does not limit the connection method of the enclosure plate 123 on the heat exchange box wall 121.

[0134] In this embodiment, the heat dissipation duct 122 is formed by enclosing the heat exchange box wall 121 with the enclosing plate 123, which simplifies the structure of the heat exchange box wall 121 and makes it easier to maintain the required strength.

[0135] Please refer to Figure 8 In one embodiment of this application, the heat exchange box wall 121 is provided with a plurality of second fins 1211, which are located outside the battery box 1.

[0136] The second fin 1211 can be arranged in one direction to form a fin group, or there can be two or more fin groups side by side. Furthermore, the second fin 1211 can be provided on a portion of the heat exchanger wall 121. In this case, the second fin 1211 can correspond to the condensation section 33 inside the battery box 1. Alternatively, the second fin 1211 can be provided on the entire area of ​​the heat exchanger wall 121.

[0137] In this embodiment, the heat exchange box wall 121 is provided with a second fin 1211 on the outside of the battery box 1, which increases the heat exchange area between the heat exchange box wall 121 and the airflow outside the battery box 1, thereby improving the heat dissipation efficiency of the heat exchange box wall 121 and thus improving the cooling efficiency of the battery cell 20.

[0138] Please refer to Figure 9 In one embodiment of this application, the battery device 100 further includes a heat insulation structure 50, which includes a driving member 51 and a heat insulation member 53; at least a portion of the heat insulation member 53 is disposed on the heat exchange box wall 121 and located outside the battery box 1; the driving member 51 is disposed on the battery box 1 and connected to the heat insulation member 53, and the driving member 51 is configured to drive the heat insulation member 53 to move in order to open or cover the heat exchange box wall 121.

[0139] The driving component 51 can provide driving force to move the insulation component 53, thereby opening or covering the heat exchange box wall 121. The driving component 51 can be a motor, which drives the winding shaft 55 (described below) to rotate, thereby collecting or releasing the insulation component 53 and opening or covering the heat exchange box wall 121. Alternatively, it can directly drive the insulation component 53 to rotate, thus opening or covering the heat exchange box wall 121. Or, the driving component 51 can be a cylinder, which drives the insulation component 53 to slide, thereby opening or covering the heat exchange box wall 121. This application does not limit the type of driving component 51. Furthermore, the driving component 51 can be disposed on the heat exchange box wall 121, and can be located outside the battery box 1 or inside the battery; or, the driving component 51 can be disposed on other walls of the battery box 1, or indirectly mounted on the battery box 1 through other supporting objects. This application does not limit the location of the driving component 51.

[0140] The insulation component 53 serves to insulate at least the heat exchanger box wall 121. The insulation component 53 can be made of a material with relatively low thermal conductivity, for example, lower than that of the battery box 1. For example, when the insulation component 53 is opened and covers the heat exchanger box wall 121 by winding and releasing the winding shaft 55, the insulation component 53 can be made of flexible insulation materials such as polyethylene (PE) foam, polyurethane foam, or glass wool. When the insulation component 53 is opened and covers the heat exchanger box wall 121 by driving sliding or direct rotation, the insulation component 53 can be made of rigid insulation materials such as polyisocyanurate, polyurethane, or rock wool board. In addition, it should be noted that the insulation element 53 may be provided only on the heat exchange box wall 121; of course, it may also be provided on other boxes of the battery box 1, for example, insulation elements 53 may be arranged on the boxes adjacent to and opposite to the heat exchange box wall 121, so that insulation elements 53 are arranged around the battery box 1.

[0141] In this embodiment, a heat exchanger wall 121 is provided with a heat insulation structure 50 including a driving member 51 and a heat insulation member 53. When the ambient temperature outside the battery device 100 is relatively high, the driving member 51 can drive the heat insulation member 53 to move and open the heat exchanger wall 121, so that the heat generated by the heat pipe 30 battery cells 20 during operation can be transferred to the heat exchanger wall 121 and dissipated to the external environment through heat exchange with the outside. At this time, the heat insulation member 53 will not affect the heat exchange between the heat exchanger wall 121 and the external environment. When the ambient temperature outside the battery device 100 is relatively low, the driving member 51 can drive the heat insulation member 53 to move and cover the heat exchanger wall 121 to achieve a heat insulation effect, reducing the possibility that the temperature of the battery cells 20 will drop too low due to excessive heat dissipation caused by a large temperature difference with the outside.

[0142] Please refer to Figure 9 In one embodiment of this application, the heat insulation structure 50 further includes a winding shaft 55 connected to the drive member 51; one end of the heat insulation member 53 is connected to the winding shaft 55, and the winding shaft 55 is configured to wind up or release the heat insulation member 53 so that the heat insulation member 53 has a wound state and an unfolded state; in the wound state, the heat insulation member 53 opens the heat exchange box wall 121, and in the unfolded state, the heat insulation member 53 covers the heat exchange box wall 121.

[0143] In this embodiment, the insulation component 53 is configured to open or cover the heat exchange box wall 121 by rotating the winding shaft 55. This ensures that the insulation component 53 does not occupy too much space during movement, thus facilitating the installation and arrangement of the insulation structure 50 within a limited space.

[0144] In one embodiment of this application, when the battery device 100 is in normal installation and use, the winding shaft 55 can be positioned on the upper side of the heat exchange box wall 121 so that when the winding shaft 55 releases the insulation member 53, the insulation member 53 can be released more smoothly and stably under the action of gravity to cover the heat exchange box wall 121. Of course, in other embodiments, the insulation member 53 can also be released from bottom to top, or it can be released along the horizontal direction.

[0145] In one embodiment of this application, along the axial direction of the winding shaft 55, the battery box 1 may be provided with guide grooves on opposite sides of the insulation member 53; the two sides of the insulation member 53 in the axial direction of the winding shaft 55 may be accommodated in the guide grooves so that the movement of the insulation member 53 is guided and limited by the guide grooves, thereby improving the accuracy of the movement of the insulation member 53 and its stability when it is covered by the heat exchange box wall 121.

[0146] In addition, when the heat exchange box wall 121 is provided with a second fin 1211 outside the battery box 1 as described above, the insulation member 53 can cover the second fin 1211.

[0147] Please refer to Figure 10 In one embodiment of this application, the battery device 100 further includes a heating structure 60, which is disposed inside the battery box 1 and spaced apart from the heat pipe 30. The heating structure 60 is configured to heat the battery cell 20.

[0148] The heating structure 60 can be used to heat the battery cell 20. The heating structure 60 can be a resistance heater, a PTC heater, an infrared radiation heater, or a Peltier heater, etc. This application does not limit the type or heating principle of the heating structure 60. Furthermore, the heating structure 60 being configured to heat the battery cell 20 means that the heating structure 60 can heat the battery cell 20 to a certain temperature, including both contact heating and non-contact indirect heating.

[0149] In this embodiment, when the ambient temperature outside the battery device 100 is relatively low, the heating structure 60 can be activated to heat the battery cell 20, reducing the possibility that the temperature of the battery cell 20 might drop too low due to excessive heat dissipation caused by a large temperature difference with the outside environment. Furthermore, the heating structure 60 is spaced apart from the heat pipe 30, ensuring that the heating structure 60 does not damage the working medium inside the heat pipe 30 during operation, allowing the heat pipe 30 to operate normally and stably within a suitable operating temperature range.

[0150] The battery device 100 may have only a heat preservation structure 50, only a heating structure 60, or both a heat preservation structure 50 and a heating structure 60.

[0151] Please refer to Figure 10 In one embodiment of this application, the heating structure 60 and the heat pipe 30 are located on different walls of the battery box 1.

[0152] The heating structure 60 and the heat pipe 30 are located on different walls of the battery box 1, meaning that the evaporation section 31 and the condensation section 33 of the heating structure 60 and the heat pipe 30 are located on different walls of the battery box 1. For example, when the evaporation section 31 and the condensation section 33 of the heat pipe 30 are located on the first wall 124 and the second wall 125 respectively, as described below, the heating structure 60 can be installed on at least one wall of the battery box 1 other than the first wall 124 and the second wall 125.

[0153] In this embodiment, the heating structure 60 and the heat pipe 30 are arranged on different walls of the battery box 1, which can increase the distance between the heating structure 60 and the heat pipe 30 and reduce the possibility that the heating structure 60 will affect the working medium inside the heat pipe 30 when it is working.

[0154] In one embodiment of this application, the heating structure 60 is a resistance heater or a PTC heater.

[0155] In this embodiment, the heating structure 60 is configured as a resistance heater or a PTC heater, which simplifies its structure and facilitates its installation within the battery box 1. Furthermore, both types of heaters offer relatively high heating efficiency, thereby improving the heating efficiency of the individual battery cells 20.

[0156] In one embodiment of this application, the battery device 100 further includes a temperature sensor, which is disposed inside the battery case 1 and electrically connected to the heating structure 60.

[0157] In this embodiment, a temperature sensor can detect the temperature inside the battery box 1 and transmit the temperature signal to the battery management system of the battery device 100. This allows the battery management system to automatically activate the heating structure 60 when it detects a low temperature inside the battery box 1, thus heating the individual battery cells 20 in a timely manner. Alternatively, the heating structure 60 can integrate a controller 200. In this case, the temperature sensor can directly transmit the temperature signal to the controller 200 within the heating structure 60. Therefore, the temperature sensor and the heating structure 60 can be directly electrically connected or indirectly connected through the battery management system.

[0158] Please refer to the reference. Figures 4 to 6 In one embodiment of this application, the evaporation section 31 is disposed on at least one side of the battery cell assembly 20A, and the evaporation section 31 is provided with a plurality of third fins 311, each third fin 311 being located between two adjacent battery cells 20.

[0159] The evaporation section 31 is located on at least one side of the battery cell assembly 20A, meaning that the evaporation section 31 can be located on only one side of the battery cell assembly 20A, for example, on the side of the battery cell assembly 20A facing away from the terminal post 21a as described below. Of course, the evaporation section 31 can be located on only two or more sides of the battery cell assembly 20A, for example, on the side of the battery cell assembly 20A facing away from the terminal post 21a, and on the side adjacent to the terminal post 21a; or on opposite sides of the battery cell assembly 20A where there is no terminal post 21a. The third fin 311 can be located on the side of the evaporation section 31 facing the battery cell assembly 20A. Furthermore, the third fin 311 can be arranged in one direction to form a fin group, or there can be two or more fin groups arranged side by side.

[0160] In this embodiment, a third fin 311 is provided on the evaporation section 31, extending between two adjacent battery cells 20, which increases the heat exchange area between the evaporation section 31 and the battery cells 20, thereby improving the heat exchange efficiency with the battery cells 20 and thus improving the cooling efficiency of the battery cells 20.

[0161] Please refer to the reference. Figure 3 , Figure 4 as well as Figure 6 In one embodiment of this application, the battery cell 20 has a first end face 211 and a second end face 221 opposite to each other, and a side peripheral surface 223 connecting the first end face 211 and the second end face 221; the first end face 211 is provided with an electrode post 21a, and the side peripheral surface 223 includes two opposite large surfaces 2231 and two opposite small surfaces 2232; the evaporation section 31 is heat exchange connected to the second end face 221 or the small surface 2232, and the third fin 311 is located between the two opposite large surfaces 2231 in two adjacent battery cells 20.

[0162] The first end face 211 can be located on the end cap 21 of the battery cell 20. The second end face 221 can be located on the housing 22 of the battery cell 20. When the battery device 100 is in normal installation and use, the first end face 211 can be arranged upwards to form the upper surface of the battery cell 20, and the second end face 221 can be arranged downwards to form the lower surface of the battery cell 20. The side peripheral surface 223 can include two large surfaces 2231 and two small surfaces 2232, all of which can be located on the housing 22 of the battery cell 20, and the area of ​​the large surface 2231 is larger than the area of ​​the small surface 2232.

[0163] In this embodiment, the third fin 311 is configured to correspond to the large surface 2231 in the battery cell 20, so that it can exchange heat with the large surface 2231 and has a large heat exchange area, which is conducive to further improving the heat exchange efficiency between the evaporation section 31 and the battery cell 20.

[0164] Please refer to Figure 4 In one embodiment of this application, the battery device 100 further includes a second thermal interface material layer 70, which is disposed between the evaporation section 31 and the battery cell 20.

[0165] In this embodiment, the second thermal interface material layer 70 disposed between the evaporation section 31 and the battery cell 20 can better fill the gap between the evaporation section 31 and the battery cell 20, and the thermal resistance of the second thermal interface material layer 70 itself is relatively low, which helps to reduce the thermal resistance between the evaporation section 31 and the battery cell 20, so as to improve the heat exchange efficiency between the evaporation section 31 and the battery cell 20.

[0166] In addition, a second thermal interface material layer 70 can also be provided between the third fin 311 and the battery cell 20 to improve the heat exchange efficiency between the two.

[0167] Please refer to Figure 5 In one embodiment of this application, the evaporation section 31 and the condensation section 33 are arranged at an angle.

[0168] Setting them at an angle means that the two sections extend in different directions. For example, the evaporation section 31 and the condensation section 33 extend horizontally and vertically, respectively.

[0169] In this embodiment, the evaporation section 31 and the condensation section 33 are arranged at an angle, which makes them more compactly distributed, thereby reducing the overall volume of the heat pipe 30 and improving its ease of installation and arrangement in the battery box 1.

[0170] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the battery box 1 has a first box wall 124 and a second box wall 125 arranged at an angle, and the battery cell 20 is provided with an electrode post 21a on the side facing away from the first box wall 124; the evaporation section 31 is disposed between the battery cell 20 and the first box wall 124, the second box wall 125 is formed as a heat exchange box wall 121, and the condensation section 33 is disposed between the battery cell 20 and the second box wall 125.

[0171] In this embodiment, the evaporation section 31 is positioned between the battery cell 20 and the first casing wall 124, allowing the evaporation section 31 to be positioned away from the electrode post 21a of the battery cell 20. This facilitates covering at least two battery cells 20, increases the heat exchange area with the battery cells 20, and improves the ease of installation and arrangement of the evaporation section 31. Condensation section 33 is positioned between the battery cell 20 and the second casing wall 125, allowing the condensation section 33 to be angled with the evaporation section 31, improving the compactness of the distribution. Furthermore, since the electrode post 21a of the battery cell 20 is typically upward-facing, the condensation section 33 can be positioned higher than the evaporation section 31. This allows the working medium in the condensation section 33 to be driven back to the evaporation section 31 under gravity when the heat pipe 30 is of the gravity type as described below, improving the circulation efficiency of the working medium and thus enhancing the thermal conductivity of the heat pipe 30 to the battery cell 20. The first box wall 124 may be located in the box body 12, and the second box wall 125 may be located in the box body 12, or partially located in the box body 12 and partially located in the box cover 11.

[0172] Of course, in other embodiments, the evaporation section 31 and the condensation section 33 may also be located on opposite sides of the battery cell assembly 20A that are adjacent to the side with the electrode post 21a. Alternatively, when the evaporation section 31 and the condensation section 33 are flat as described above, they may both be located on the side of the battery cell 20 that is away from the electrode post 21a. In this case, the first box wall 124 may be formed as the heat exchange box wall 121.

[0173] In one embodiment of this application, there is one heat pipe 30, and the evaporation section 31 is heat-exchange connected to all the battery cells 20.

[0174] In this embodiment, setting the number of heat pipes 30 to one reduces the overall number of heat pipes 30, thereby simplifying the structure of the battery device 100. Simultaneously, connecting all battery cells 20 to a single heat pipe 30 for heat exchange also improves the uniformity of temperature distribution across all battery cells 20.

[0175] In one embodiment of this application, a plurality of battery cells 20 are arranged along a first direction to form a battery pack 20B, and the battery device 100 includes at least two battery packs 20B arranged along a second direction, which intersects with the first direction; the number of heat pipes 30 is at least two, and each heat pipe 30 is provided corresponding to a battery pack 20B.

[0176] When the battery device 100 is in normal installation and use, the first direction and the second direction can be two horizontal directions, and the terminal post 21a of the battery cell 20 can be set upwards. In addition, the large surface 2231 of the battery cell 20 can intersect with the first direction.

[0177] In this embodiment, a heat pipe 30 is provided for each battery pack 20B, which makes it convenient to replace and repair the heat pipe 30 in a targeted manner when different heat pipes 30 are damaged, thereby improving the convenience of heat pipe 30 maintenance.

[0178] Alternatively, in the first direction, there may be battery packs 20B arranged with at least two intervals. This application does not limit the number or arrangement of battery packs 20B.

[0179] In one embodiment of this application, the heat pipe 30 is a gravity heat pipe 30.

[0180] In this embodiment, the heat pipe 30 is configured as a gravity heat pipe 30, so that the working medium in the condensation section 33 can be driven to flow back to the evaporation section 31 under the action of gravity, thereby improving the circulation efficiency of the working medium and thus improving the thermal conductivity of the heat pipe 30 to the battery cell 20.

[0181] Please refer to Figure 5 In one embodiment of this application, the evaporation section 31 is a plate-like structure.

[0182] In this embodiment, the evaporation section 31 is configured as a plate structure, which ensures that the evaporation section 31 and the battery cell 20 do not occupy too much space in the stacking arrangement direction.

[0183] Please refer to Figure 5 In one embodiment of this application, the condensation section 33 is a plate-like structure.

[0184] In this embodiment, the condensation section 33 is set as a plate structure, which can prevent the condensation section 33 and the battery cell 20 from occupying too much space in the stacking arrangement direction.

[0185] In one embodiment of this application, at least the outer side of the evaporation section 31 of the heat pipe 30 is provided with an insulating structure.

[0186] The evaporation section 31 is provided with an insulating structure at least on its outer side. This means that the insulating structure can be provided only on the outer side of the evaporation section 31, or it can be further provided on the condensation section 33 to increase the creepage distance between the condensation section 33 and the battery cell 20. The insulating structure can be an insulating coating or an insulating film, or it can be an insulating pad placed between the heat pipe 30 and the battery cell 20.

[0187] In this embodiment, an insulating structure is provided at least on the outside of the evaporation section 31, so that the heat pipe 30 and the battery cell 20 can be insulated and protected by the insulating structure, which is conducive to further improving the reliability of the battery device 100.

[0188] In one embodiment of this application, the insulating structure is an insulating coating or an insulating film.

[0189] In this embodiment, the insulating structure is an insulating coating or an insulating film, which allows the insulating structure to be firmly fixed to the outside of the heat pipe 30, so as to provide normal and stable insulation protection. Furthermore, the insulating coating and insulating film themselves have good insulation properties, which helps to improve the reliability of the insulation. Moreover, the thickness of the insulating coating or insulating film is relatively thin, so it does not occupy too much space. The insulating coating can be formed by applying insulating coatings such as epoxy resin, polyurethane, or acrylic to the outside of the heat pipe 30. The insulating film can be formed by covering the outside of the heat pipe 30 with materials such as polyethylene terephthalate, polyimide, polycarbonate, polyethylene, polyvinylidene fluoride, or polytetrafluoroethylene.

[0190] In one embodiment of this application, the battery box 1 is not equipped with a liquid cooling plate or liquid cooling pipe.

[0191] In this embodiment, the liquid cooling plate or liquid cooling pipe in the battery box 1 is eliminated and replaced by a heat pipe 30, which can meet the cooling requirements of the individual battery cells 20 and also has the function of uniform temperature distribution among the individual battery cells 20. Moreover, the dielectric chamber inside the heat pipe 30 is closed, which avoids the situation in traditional battery boxes 1 where the liquid cooling plate needs to circulate coolant with external electrical equipment. This avoids the risk of adding coolant of a different type than the original coolant in the liquid cooling plate, which could cause the different types of coolant to mix and react, corrode the liquid cooling plate, cause coolant leakage, and lead to internal insulation failure of the battery device 100.

[0192] In one embodiment of this application, the battery device 100 further includes a first radiator, which is disposed outside the battery box 1 and is heat-exchange connected to the heat exchange box wall 121.

[0193] The first radiator is used for heat exchange with the air outside the battery box 1. This first radiator may include a main body and multiple heat dissipation fins. The main body can be heat-exchange connected to the heat exchange box wall 121, including a contact connection and a spaced-out connection with a thermal interface material or other heat-conducting component between the two. The heat dissipation fins can be connected to the main body to increase the heat exchange contact area with the airflow. Furthermore, the first radiator can be mounted and fixed to the heat exchange box wall 121, or it can be mounted and fixed to the vehicle 1000.

[0194] In this embodiment, a first radiator is provided on the outside of the battery box 1 and is heat-exchange connected to the heat exchange box wall 121. This allows external airflow to continuously blow onto the first radiator during vehicle 1000 operation, enabling continuous heat dissipation from the heat exchange box wall 121 through the first radiator. This improves the heat dissipation efficiency of the heat exchange box wall 121, thereby facilitating the faster dissipation of heat transferred from the heat pipe 30 to the heat exchange box wall 121 and its dissipation to the outside of the battery box 1, thus enhancing the cooling efficiency of the battery cells 20.

[0195] In one embodiment of this application, the heat exchange box wall 121 can be positioned facing the front end of the vehicle 1000, that is, the side where the vehicle 1000 is moving, so that the heat exchange box wall 121 is formed as the front side of the battery device 100, and the first radiator is located on the front side of the battery box 1, and can be positioned to face the wind, so that during the driving of the vehicle 1000, the external airflow can flow towards the first radiator better, increasing the contact area between the two and improving the heat exchange efficiency.

[0196] In one embodiment of this application, to further improve the heat dissipation effect of the first radiator, the first radiator may further include a cooling fan, through which airflow is driven to flow through the heat dissipation fins.

[0197] In one embodiment of this application, in order to further improve the heat dissipation effect of the first heat sink, a liquid cooling channel can be provided in the main body, and coolant can be circulated through the circulation pipe for cooling, thereby achieving a combination of air cooling and liquid cooling, and further improving the cooling efficiency of the battery cell 20.

[0198] Additionally, it should be noted that when the heat exchanger wall 121 is provided with the second fin 1211 as described above, the first radiator can be heat exchanged with the second fin 1211, or it can be heat exchanged with the area of ​​the heat exchanger wall 121 where the second fin 1211 is not provided.

[0199] When the heat exchange box wall 121 is provided with a heat insulation structure 50 as described above, the heat insulation component 53 in the heat insulation structure 50 can be placed on the side of the first radiator facing away from the heat exchange box wall 121, so as to cover the heat exchange box wall 121 and the first radiator through the heat insulation component 53.

[0200] Please refer to the reference. Figures 2 to 5 ,as well as Figure 9 and Figure 10 In one embodiment of this application, the battery device 100 includes a battery case 1, a battery cell assembly 20A, and a heat pipe 30. The battery cell assembly 20A is disposed within the battery case 1 and includes multiple battery cells 20. The heat pipe 30 is disposed within the battery case 1 and has a closed medium cavity containing a working medium. The heat pipe 30 includes a connected evaporation section 31 and a condensation section 33. The evaporation section 31 is heat-exchange connected to at least two battery cells 20. At least a portion of the battery case 1 is formed as a heat exchange box wall 121. The condensation section 33 is heat-exchange connected to the heat exchange box wall 121 and spaced apart from the battery cells 20. The battery device 100 also includes a first thermal interface material layer 40 disposed between the heat exchange box wall 121 and the battery case 1. The battery box 1 is provided with a heat dissipation duct 122, and the heat exchange box wall 121 encloses at least a portion of the heat dissipation duct 122. At least a portion of the condensation section 33 is located within the heat dissipation duct 122. The battery device 100 also includes a heat insulation structure 50, which includes a driving member 51 and a heat insulation member 53. At least a portion of the heat insulation member 53 is located on the heat exchange box wall 121 and outside the battery box 1. The driving member 51 is located in the battery box 1 and connected to the heat insulation member 53. The driving member 51 is configured to drive the heat insulation member 53 to move, thereby opening or covering the heat exchange box wall 121. The battery device 100 also includes a heating structure 60, which is located inside the battery box 1 and spaced apart from the heat pipe 30. The heating structure 60 is configured to heat the individual battery cells 20. The heating structure 60 and the heat pipe 30 are located on different walls of the battery box 1. The heating structure 60 is a resistance heater or a PTC heater. The battery device 100 also includes a temperature sensor, which is located inside the battery box 1 and electrically connected to the heating structure 60. The battery device 100 also includes a second thermal interface material layer 70, which is disposed between the evaporation section 31 and the battery cell 20. The battery box 1 has a first box wall 124 and a second box wall 125 arranged at an angle. The battery cell 20 has an electrode post 21a on the side facing away from the first box wall 124. The evaporation section 31 is disposed between the battery cell 20 and the first box wall 124. The second box wall 125 is formed as a heat exchange box wall 121. The condensation section 33 is disposed between the battery cell 20 and the second box wall 125. At least the outer side of the evaporation section 31 of the heat pipe 30 has an insulating structure. The evaporation section 31 has a plate-like structure. The condensation section 33 has a plate-like structure.

[0201] This application also proposes a battery swapping station, which is equipped with a charging compartment configured to house the battery device 100; the charging compartment is equipped with a heat exchange mechanism configured to be heat-exchange connected to the battery device 100 housed in the charging compartment.

[0202] In this embodiment, when the battery device 100 is charging in the charging compartment of the battery swapping station, the individual battery cells 20 have a high heat output, generating a significant amount of heat. Furthermore, since the battery device 100 itself is located within the charging compartment, its heat exchange capacity with the external environment is limited. Therefore, to improve the cooling effect on the battery device 100 within the charging compartment, a heat exchange mechanism is installed inside the charging compartment to remove the heat from the battery device 100. This heat exchange mechanism can employ liquid cooling. For example, the heat exchange mechanism may include a circulation pipe and a heat exchanger and a second radiator mounted on the circulation pipe, with the heat exchanger connected to the battery compartment 1 in a heat exchange connection. In this way, the heat generated by the battery device 100 can be transferred via the heat exchanger to the coolant flowing into the heat exchanger, and then the coolant flows to the second radiator for cooling, before circulating back to the heat exchanger, thus achieving continuous heat exchange and cooling of the battery device 100. Alternatively, the heat exchange mechanism can also employ air cooling. For example, the heat exchange mechanism may include a fan, the airflow of which can be guided through a duct to flow through the battery device 100, thereby carrying away the heat generated by the battery device 100. Therefore, this application does not limit the type of heat exchange mechanism.

[0203] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized in that, include: Battery box; A battery cell assembly, wherein the battery cell assembly is disposed within the battery box, and the battery cell assembly comprises a plurality of battery cells; as well as A heat pipe is disposed inside the battery box, and the heat pipe has a closed medium cavity containing a working medium. The heat pipe includes an evaporation section and a condensation section that are connected to each other, and the evaporation section is connected to at least two of the battery cells in a heat exchange configuration. At least a portion of the battery box is formed as a heat exchange box wall, the condensation section is heat-exchange connected to the heat exchange box wall and is spaced apart from the individual battery cells; The heat pipe has an insulating structure on the outer side of at least the evaporation section.

2. The battery device as claimed in claim 1, characterized in that, The condensation section is arranged in contact with the wall of the heat exchange box; Alternatively, the condensation section is spaced apart from the heat exchange box wall, and the battery device further includes a first thermal interface material layer, which is disposed between the heat exchange box wall and the battery box.

3. The battery device as claimed in claim 1, characterized in that, A portion of the surface of the condensing section is formed as a heat exchange wall, which is connected to the heat exchange box wall in a heat exchange connection. At least a portion of the surface of the condensing section other than the heat exchange wall is provided with a plurality of first fins.

4. The battery device as claimed in claim 3, characterized in that, The condensation section has a first surface and a second surface arranged opposite to each other. The first surface is formed as the heat exchange wall, and the second surface is provided with a plurality of the first fins.

5. The battery device as claimed in claim 1, characterized in that, The battery box is provided with a heat dissipation duct, and the heat exchange box wall encloses at least a portion of the heat dissipation duct. At least a portion of the condensation section is located within the heat dissipation duct.

6. The battery device as claimed in claim 5, characterized in that, The battery device also includes an enclosure plate, which is disposed inside the battery box and encloses the heat exchange box wall to form the heat dissipation duct.

7. The battery device as claimed in claim 1, characterized in that, The heat exchange box wall is provided with multiple second fins, and the multiple second fins are located outside the battery box.

8. The battery device according to any one of claims 1 to 7, characterized in that, The battery device also includes a thermal insulation structure, which includes a driving component and a thermal insulation component. At least a portion of the insulation element is disposed on the wall of the heat exchange box and located outside the battery box; The driving component is located in the battery box and connected to the insulation component. The driving component is configured to drive the insulation component to move in order to open or cover the heat exchange box wall.

9. The battery device as claimed in claim 8, characterized in that, The insulation structure also includes a winding shaft, which is connected to the driving component; One end of the insulation component is connected to the winding shaft, which is configured to wind up or unwind the insulation component, so that the insulation component has a wound state and an unfolded state. In the coiled state, the insulation component opens the heat exchange box wall; in the unfolded state, the insulation component covers the heat exchange box wall.

10. The battery device according to any one of claims 1 to 7, characterized in that, The battery device further includes a heating structure located inside the battery box and spaced apart from the heat pipe. The heating structure is configured to heat the individual battery cells.

11. The battery device as claimed in claim 10, characterized in that, The heating structure and the heat pipe are located on different walls of the battery box; And / or, the heating structure is a resistance heater or a PTC heater; And / or, the battery device further includes a temperature sensor located inside the battery compartment and electrically connected to the heating structure.

12. The battery device according to any one of claims 1 to 7, characterized in that, The evaporation section is located on at least one side of the battery cell assembly, and the evaporation section is provided with a plurality of third fins, each of the third fins being located between two adjacent battery cells.

13. The battery device as claimed in claim 12, characterized in that, The battery cell has a first end face and a second end face opposite to each other, and a side peripheral face connecting the first end face and the second end face; The first end face is provided with a pole post, and the side peripheral surface includes two opposing large surfaces and two opposing small surfaces; The evaporation section is heat-exchange connected to the second end face or the small face, and the third fin is located between two opposing large faces in two adjacent battery cells.

14. The battery device according to any one of claims 1 to 7, characterized in that, The battery device further includes a second thermal interface material layer, which is disposed between the evaporation section and the battery cell.

15. The battery device according to any one of claims 1 to 7, characterized in that, The evaporation section and the condensation section are arranged at an angle.

16. The battery device as claimed in claim 15, characterized in that, The battery box has a first box wall and a second box wall arranged at an angle, and the battery cell has a terminal post on the side facing away from the first box wall; The evaporation section is located between the battery cell and the first box wall, the second box wall is formed as the heat exchange box wall, and the condensation section is located between the battery cell and the second box wall.

17. The battery device according to any one of claims 1 to 7, characterized in that, The number of heat pipes is one, and the evaporation section is configured to be heat-exchange connected to all the battery cells; Alternatively, multiple battery cells are arranged along a first direction to form a battery pack, and the battery device includes at least two battery packs arranged along a second direction, which intersects with the first direction; the number of heat pipes is at least two, and each heat pipe corresponds to one battery pack.

18. The battery device according to any one of claims 1 to 7, characterized in that, The heat pipe is a gravity heat pipe; And / or, the evaporation section has a plate-like structure; And / or, the condensation section has a plate-like structure.

19. The battery device according to any one of claims 1 to 7, characterized in that, The insulating structure is an insulating coating or an insulating film.

20. The battery device according to any one of claims 1 to 7, characterized in that, The battery box does not have a liquid cooling plate or liquid cooling pipe.

21. The battery device according to any one of claims 1 to 7, characterized in that, The battery device also includes a first radiator, which is located outside the battery box and is connected to the heat exchange box wall for heat exchange.

22. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 21.

23. A battery swapping station, characterized in that, The battery swapping station is equipped with a charging compartment, which is configured to house the battery device as described in any one of claims 1 to 21. The charging compartment is provided with a heat exchange mechanism, which is configured to be in heat exchange connection with the battery device housed in the charging compartment.

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