Battery devices, energy storage devices and electrical equipment

Abstract

The present application is applicable to the field of battery technology, and proposes a battery device, an energy storage device and an electrical device. The battery device includes a box and a moisture absorption device. The box is used to accommodate battery cells, and a vent is provided on the box. The moisture absorption device includes a shell, a moisture absorption core and a heating element. The shell includes two bottom plates and a side plate connected between the two bottom plates. Both bottom plates are provided with vents. The side plates are used to enclose an air flow channel. The moisture absorption core is filled in the air flow channel and fits with the inner wall of the side plate. The moisture absorption core includes a recyclable moisture absorption material. The heating element is surrounded on the outer wall of the side plate and is used to heat the moisture absorption core. The moisture absorption device is arranged inside the box or embedded in the wall of the box. The moisture absorption device blocks the vent and connects the inside and outside of the box through the vent. The moisture absorption device is used to filter the gas passing through the vent. The technical solution provided in the embodiment of the present application can solve the problem of condensation water easily appearing inside the box of the battery device in the related art.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery device, an energy storage device and an electrical equipment. Background Art

[0002] During long-term use of the battery, water vapor in the air will enter the battery case through various channels and produce condensation inside the case. The accumulation of condensation water will cause corrosion of metal parts, decreased battery insulation, and other problems, affecting the performance and safety of the battery. Summary of the invention

[0003] In view of this, the embodiments of the present application provide a battery device, an energy storage device and an electrical device, which solve the technical problem in the related art that condensation water is easily generated inside the box of the battery device.

[0004] An embodiment of the first aspect of the present application provides a battery device, including: a box body for accommodating battery cells, the box body is provided with ventilation holes; a desiccant device, including a shell, a desiccant core and a heating element, the shell body includes two bottom plates and a side plate connected between the two bottom plates, both bottom plates are provided with ventilation holes, the side plates are used to enclose an air flow channel, the desiccant core is filled in the air flow channel and fits with the inner wall of the side plate, the desiccant core includes recyclable desiccant material, the heating element is surrounded on the outer wall of the side plate and is used to heat the desiccant core, the desiccant device is arranged inside the box body or embedded in the wall of the box body, the desiccant device blocks the ventilation holes, and connects the inside and outside of the box body through the ventilation holes, and the desiccant device is used to filter the gas passing through the ventilation holes.

[0005] In the battery device provided in the above embodiment, a vent is provided on the box body, the desiccant device is provided inside the box body or embedded in the wall of the box body, and can block the vent, the desiccant device includes a shell and a desiccant core filled in the shell, a vent is provided on the bottom plate of the shell body, and the vent can connect the inside and outside of the box body, and the desiccant core includes a recyclable desiccant material, so that when the gas outside the box body enters the inside of the box body, the desiccant device can effectively absorb the water vapor in the gas, reduce the risk of water vapor invading the inside of the box body, so that the inside of the box body is It can be kept dry so that condensed water will not be generated and accumulated inside the box. In addition, when the dry gas inside the box is discharged to the outside of the box, it can take away the moisture accumulated in the hygroscopic material and restore the hygroscopic core to a dry state, so that the hygroscopic device can maintain good hygroscopic performance and play a role in the battery device for a long time. In addition, since a heating element is fitted on the outer wall of the side plate of the shell, the hygroscopic core is heated by the heating element, which can promote the evaporation of moisture in the hygroscopic core, so that the hygroscopic core can be quickly dried and the hygroscopic capacity can be restored, thereby improving the reliability of the hygroscopic device.

[0006] In some embodiments, the airflow channel formed by the side panels is cylindrical. With the above design, the side panels can better guide the air flow, and the cylindrical airflow channel is conducive to improving space efficiency, can occupy a smaller external space and provide a larger accommodation space for the moisture-absorbing core.

[0007] In some embodiments, the bottom plate is provided with a plurality of air holes, and the plurality of air holes are arranged at intervals around the center of the bottom plate. With the above design, gas can flow evenly into the air flow channel from the plurality of air holes, and the gas flow path is reasonable, so that the gas can fully contact with the moisture absorbent core in a short time, which is conducive to improving the moisture absorption efficiency and moisture absorption performance of the moisture absorbent device.

[0008] In some embodiments, the side plate includes two opposite ends in the extension direction of the airflow channel, and the housing further includes extension plates disposed at both ends of the side plate, the extension plates are vertically connected to the outer wall of the side plate, and the outer edge of the extension plates is connected to the outer edge of the bottom plate. The above design is conducive to reducing the difficulty of assembling the housing, and because the extension plates can support the bottom plate, the two can maintain a stable connection, which is also conducive to improving the overall strength of the housing.

[0009] In some embodiments, the heating element is a heating film. With the above design, the heating film has good flexibility, which is convenient for covering various curved and irregular surfaces, and the heating film can evenly heat the moisture-absorbing core to avoid the problem of local overheating.

[0010] In some embodiments, the moisture absorbing device further comprises a waterproof breathable membrane disposed in the housing, the waterproof breathable membrane being located between the moisture absorbing core and the bottom plate, and the waterproof breathable membrane at least covering the air holes. The above design can prevent liquid water from entering the interior of the box through the housing, effectively improving the reliability of the moisture absorbing device.

[0011] In some embodiments, the waterproof breathable membrane covers the entire inner wall of the bottom plate. The above design is helpful to improve the covering effect of the waterproof breathable membrane at the vent hole, thereby ensuring that the waterproof breathable membrane can function normally.

[0012] In some embodiments, the side plate includes two opposite ends in the extension direction of the airflow channel, and the housing further includes extension plates disposed at both ends of the side plate, the extension plates are vertically connected to the outer wall of the side plate, and the extension plates are disposed around the circumference of the side plate, the outer edge of the extension plate is connected to the outer edge of the bottom plate, and a receiving groove is disposed on a side of the extension plate connected to the bottom plate, and the waterproof breathable membrane is disposed in the receiving groove and fixed between the extension plate and the bottom plate. With the above design, the waterproof breathable membrane is accurately installed and is not easily displaced, further improving the reliability of the moisture absorbing device.

[0013] In some embodiments, the moisture absorbing device is disposed in the vent hole, one bottom plate of the moisture absorbing device faces the outside of the box, and the vent hole on the bottom plate is used to connect to the outside of the box, and the other bottom plate of the moisture absorbing device faces the inside of the box, and the vent hole on the bottom plate is used to connect to the inside of the box. With the above design, the space occupied by the moisture absorbing device inside the box can be reduced, so that the box can provide more accommodation space for structures such as battery cells.

[0014] In some embodiments, the moisture absorbing device is disposed inside the box, a bottom plate of the moisture absorbing device abuts against the inner wall of the box and covers the vent, and the vent on the bottom plate is connected to the vent. With the above design, the box can provide reliable protection for the moisture absorbing device, reducing the risk of the moisture absorbing device being damaged by impact and pressure.

[0015] In some embodiments, the battery device further includes a profiling structure, which is used to replace the battery cell. The profiling structure is arranged inside the box and one side of the profiling structure is arranged in contact with the inner wall of the box. The profiling structure is provided with an installation channel, and the moisture absorption device is arranged in the installation channel. With the above design, the space inside the box can be better utilized, and the compactness of the assembly of the moisture absorption device and other structures inside the box can be improved. At the same time, the profiling structure can also provide protection for the moisture absorption device.

[0016] In some embodiments, the hygroscopic material includes at least one of silica gel, calcium chloride, montmorillonite, and silicon dioxide. With the above design, the hygroscopic material has good hygroscopic performance, can be used for a long time, and has low cost.

[0017] An embodiment of the second aspect of the present application provides an energy storage device, including the battery device in the first aspect, and the battery device is used to store or provide electrical energy.

[0018] The energy storage device provided in the above embodiment, by adopting the battery device in the first aspect, improves the reliability and safety of the energy storage device.

[0019] An embodiment of the third aspect of the present application provides an electrical device, including a battery device as in the first aspect, wherein the battery device is used to store or provide electrical energy.

[0020] The electrical equipment provided in the above embodiment improves the reliability and safety of the electrical equipment by adopting the battery device in the first aspect.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0024] Figure 2 is a schematic structural diagram of a battery device provided in one embodiment of the present application;

[0025] Figure 3 is a schematic structural diagram of a moisture absorption device provided in an embodiment of the present application;

[0026] Figure 4 yes Figure 3 A cross-sectional view of the moisture absorbing device shown;

[0027] Figure 5 yes Figure 3 An exploded view of the moisture absorbing device shown;

[0028] Figure 6 yes Figure 2 A partial cross-sectional view of the moisture absorbing device and the box in the battery device shown;

[0029] Figure 7 is a structural schematic diagram of a box body and a contoured structure provided by another embodiment of the present application;

[0030] Figure 8 yes Figure 7 A schematic diagram of the bottom structure of the box shown;

[0031] Fig. 9 yes Figure 7 A schematic diagram of the structure of the profiling structure and the moisture absorbing device shown;

[0032] Fig.10 yes Fig. 9 An exploded view of the contoured structure and the moisture absorbing device shown;

[0033] Fig.11 yes Figure 3 A schematic diagram of the structure of the bottom plate in the moisture absorption device shown;

[0034] Fig.12 yes Figure 4 A partial enlarged view of the structure shown in Figure 1.

[0035] The meanings of the marks in the figure are:

[0036] 1000, vehicle; 100, battery device; 200, controller; 300, motor;

[0037] 10. Box body; 11. First part; 12. Second part; 13. Ventilation hole; 20. Battery cell; 30. Moisture absorption device; 31. Shell; 311. Ventilation hole; 312. Bottom plate; 312a. First bottom plate; 312b. Second bottom plate; 313. Side plate; 3131. Air flow channel; 314. Extension plate; 3141. Accommodation groove; 32. Moisture absorption core; 33. Heating element; 34. Waterproof breathable membrane; 40. Contour structure; 41. Installation channel; 5. Installation groove. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] The battery device includes a box and a battery cell disposed inside the box. During the long-term use of the battery device, the temperature and pressure inside the box will fluctuate. In order to ensure the stable operation of the battery device, the box is generally provided with a vent and a pressure balance valve. These structures allow a small amount of gas to enter and exit the box, thereby achieving temperature and pressure balance inside and outside the box by relying on the flow of gas. However, when the gas flows into the box, it may carry a large amount of water vapor, which increases the humidity of the environment inside the box and easily generates condensation inside the box, which may lead to corrosion of metal parts, circuit failure, reduced insulation performance and other problems, posing a threat to the performance and safety of the battery device.

[0047] Currently, a desiccant piece can be set inside the box to absorb water vapor entering the box to keep the internal environment of the box dry. However, the desiccant piece has a limited moisture absorption capacity and cannot be reused after being saturated with water. There is also a risk that the water absorbed by the desiccant piece will seep out from the surrounding area.

[0048] Based on the above considerations, the present application provides a battery device, including a box body and a moisture absorbing device, the moisture absorbing device is arranged inside the box body or embedded in the wall of the box body, the moisture absorbing device includes a shell and a moisture absorbing core arranged in the shell body, wherein the shell body is provided with a vent hole for gas to enter and exit the shell body, the moisture absorbing core is arranged in the shell body and includes a recyclable moisture absorbing material, the moisture absorbing device connects the inside and outside of the box body through the vent hole, and is used to filter the gas passing through the vent hole. In this way, by providing a moisture absorbing device, the gas entering the inside of the box body can be dried, reducing the risk of water vapor invading the inside of the box body, thereby solving the technical problem that condensed water is easily generated and accumulated inside the box body, and at the same time, in the process of exhausting the inside of the box body to the outside, the moisture accumulated in the moisture absorbing core can also be taken away, so that the moisture absorbing core is restored to a dry state, so that the moisture absorbing device can maintain good moisture absorption performance and play a role in the battery device for a long time.

[0049] The battery device provided in the embodiment of the present application can be used in electrical equipment that uses the battery device as a power source or various energy storage devices or energy storage systems that use the battery device as an energy storage element. Electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, battery cars, electric cars, ships, spacecraft, and the like. Among them, electric toys can include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0050] For the convenience of explanation, the embodiment of the present application is described by taking an electrical device as a vehicle 1000 as an example.

[0051] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0052] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0053] Please refer to Figure 2 , Figure 2 An exploded view of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is contained in the box body 10. Among them, the box body 10 is used to provide a storage space for the battery cell 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first part 11 and a second part 12, and the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc. In some embodiments, the box 10 can be used as a part of the chassis structure of the vehicle 1000. For example, part of the box 10 can become at least a part of the floor of the vehicle 1000, or part of the box 10 can become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0054] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; or, the multiple battery cells 20 may be first connected in series, in parallel, or in a mixed connection to form a battery cell assembly, and the multiple battery cell assemblies are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0055] The battery cell 20 refers to the smallest unit constituting the battery device 100. Each battery cell 20 may be a secondary battery or a primary battery, wherein a secondary battery refers to a battery cell 20 that can be continuously used by activating the active material by charging after the battery cell 20 is discharged; the battery cell 20 may be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0056] The technical solution provided by the embodiment of the present application is described below in conjunction with the accompanying drawings. Figures 2 to 12 , Figure 3 is a schematic structural diagram of a moisture absorption device 30 provided in some embodiments of the present application; Figure 4 yes Figure 3 A cross-sectional view of the moisture absorbing device 30 in the illustrated embodiment; Figure 5 yes Figure 3 An exploded view of the moisture absorbing device 30 in the illustrated embodiment; Figure 6 is a partial cross-sectional view of a moisture absorption device 30 and a box body 10 provided in some embodiments of the present application; Figure 7 It is a structural schematic diagram of a box body 10 and a contoured structure 40 provided in some embodiments of the present application; Figure 8 yes Figure 7 A schematic diagram of the bottom structure of the box body 10 in the illustrated embodiment; Fig. 9 yes Figure 7 A schematic diagram of the structure of the contour structure 40 and the moisture absorbing device 30 in the illustrated embodiment; Fig.10 yes Fig. 9 An exploded view of the contoured structure 40 and the moisture absorbing device 30 in the illustrated embodiment; Fig.11 yes Figure 3 A schematic diagram of the structure of the bottom plate 312 in the moisture absorbing device 30 in the illustrated embodiment; Fig.12 yes Figure 4 A partial enlarged view of the structure shown in Figure 1.

[0057] like Figure 5 As shown, the direction indicated by X is defined as the radial direction of the airflow channel 3131, and the direction indicated by Y is defined as the extending direction of the airflow channel 3131. The side plate 313 has two opposite ends in the Y direction.

[0058] The embodiment of the first aspect of the present application provides a battery device 100, please refer to Figure 2 , including a box body 10 and a moisture absorption device 30. The box body 10 is used to accommodate the battery cell 20, and a vent hole 13 is provided on the box body 10. Please refer to Figure 3 and Figure 4The desiccant device 30 includes a shell 31, a desiccant core 32 and a heating element 33. The shell 31 includes two bottom plates 312 and a side plate 313 connected between the two bottom plates 312. Both bottom plates 312 are provided with air holes 311. The side plates 313 are used to enclose an air flow channel 3131. The desiccant core 32 is filled in the air flow channel 3131 and fits with the inner wall of the side plate 313. The desiccant core 32 includes recyclable desiccant material. The heating element 33 is surrounded by the outer wall of the side plate 313 and is used to heat the desiccant core 32. The desiccant device 30 is arranged inside the box body 10 or embedded in the wall of the box body 10. The desiccant device 30 blocks the air hole 13 and connects the inside and outside of the box body 10 through the air hole 311. The desiccant device 30 is used to filter the gas passing through the air hole 311.

[0059] One or more vents 13 are provided on the box body 10. The vents 13 penetrate the inner and outer surfaces of the box body 10 to connect the inside and outside of the box body 10. The vents 13 can be used as a passage for gas to enter and exit the box body 10, or the vents 13 can also be used to install the moisture absorption device 30. The size and shape of the vents 13 are determined according to design requirements. Optionally, the vents 13 can be circular, square or other special-shaped structures, but are not limited thereto. It should be noted that the location of the vents 13 is determined according to the location of the exhaust passage inside the box body 10 and the arrangement of the battery cells 20. Figure 2 The illustrated embodiment is only used to illustrate that the vent holes 13 are provided on the box body 10 , and is not used to limit the specific number and opening positions of the vent holes 13 .

[0060] The shell 31 is used to encapsulate the hygroscopic core 32 and provide necessary protection for the hygroscopic core 32. The shell 31 can be made of plastic or metal materials, for example, it can be an aluminum alloy shell 31 or a stainless steel shell 31, so as to have good strength and corrosion resistance. The two bottom plates 312 and the side plates 313 together form a storage space for placing the hygroscopic core 32. The bottom plate 312 and the side plates 313 can be flat, or grooves or protrusions or other forms can be set to adapt to the shape and layout of the hygroscopic core 32. The bottom plate 312 and the side plates 313 can be an integral structure or a split structure. When the bottom plate 312 and the side plates 313 are designed as a split structure, the two can be fixedly connected by bonding, welding, snap connection, locking connection, etc. Both bottom plates 312 are provided with air holes 311, and gas can enter the air flow channel 3131 from the air holes 311 on one bottom plate 312, flow through the moisture-absorbing core 32, and be discharged from the air holes 311 on the other bottom plate 312. The size and shape of the air holes 311 are determined according to design requirements. Optionally, the air holes 311 can be circular, square or other special-shaped structures, but are not limited thereto. The air flow channel 3131 surrounded by the side plates 313 is used to limit the flow path of the gas in the shell 31. The air flow channel 3131 can be a linear or curved structure. Optionally, in some embodiments, the two bottom plates 312 are arranged opposite to each other, and the side plates 313 surround a linear air flow channel 3131. The size of the airflow channel 3131 is determined according to design requirements. For example, when the ventilation requirements are high, the radial size of the airflow channel 3131 can be increased to expand the ventilation area. When the dehumidification requirements are high, the length of the airflow channel 3131 in the extension direction Y can be increased to provide more accommodating space for the hygroscopic core 32 and enhance the contact effect between the gas and the hygroscopic core 32.

[0061] The heating element 33 is connected to a power supply device and can convert electrical energy into heat energy, wherein the power supply device can be the battery device 100 where the moisture absorption device 30 is located, or can be an external battery device 100 or other discharge device. It can be understood that in order to ensure that the water evaporated from the moisture absorption core 32 can be smoothly discharged from the moisture absorption device 30 and the box body 10, the heating element 33 needs to be turned on in the exhaust state.

[0062] The hygroscopic core 32 is used to filter the gas flowing through the vent 13, and the recyclable hygroscopic material in the hygroscopic core 32 can repeatedly absorb or release water vapor in the gas. The hygroscopic material can be a resin material or a fiber material. The surface of these materials has a highly developed pore structure, which can lock moisture in a physical way and can be regenerated by heating or ventilation. It can be understood that the hygroscopic material can also be other materials with good hygroscopic and regenerative properties. The hygroscopic material can be in block, granular, or powdery form, but is not limited to this. Depending on the structure of the hygroscopic material, the hygroscopic core 32 can also include a packaging structure or a supporting structure. The packaging structure and the supporting structure are used to maintain the shape and stability of the hygroscopic material, wherein the packaging structure includes but is not limited to non-woven fabrics and filter paper.

[0063] When the air pressure inside the housing 10 is lower than the air pressure outside the housing 10, for example, when the ambient temperature of the battery device 100 decreases, the gas outside the housing 10 can enter the housing 10 through the vent 13 and the moisture absorber 30. When the humid gas flows through the moisture absorber 30, the moisture absorber core 32 is fully in contact with the gas. The moisture absorber material can effectively absorb the water vapor in the gas and store the water in the moisture absorber core 32, so that the gas entering the housing 10 becomes dry gas. When the air pressure inside the housing 10 is higher than the air pressure outside the housing 10, for example, when the battery device 100 is charged and discharged, causing the temperature inside the housing 10 to rise, the gas inside the housing 10 can be discharged to the outside of the housing 10 through the vent 13 and the moisture absorber 30. When the dry gas flows through the moisture absorber 30, it can promote the evaporation of the water in the moisture absorber material and take away the water vapor molecules on the surface of the moisture absorber material, thereby reducing the water content inside the moisture absorber core 32, so that the moisture absorber core 32 is restored to a dry state and the moisture absorption performance is restored. It can be understood that the gas exhausted from the inside of the box body 10 is generally high-temperature gas. When the high-temperature gas flows through the hygroscopic core 32, it can better promote the evaporation of moisture in the hygroscopic material.

[0064] In the battery device 100 provided in the above embodiment, a vent hole 13 is provided on the box body 10, and the moisture absorption device 30 is arranged inside the box body 10 or embedded in the wall of the box body 10, and can block the vent hole 13. The moisture absorption device 30 includes a shell 31 and a moisture absorption core 32 filled in the shell body 31. The bottom plate of the shell body 31 is provided with a vent hole 311, and the vent hole 311 can communicate the inside and outside of the box body 10. The moisture absorption core 32 includes a recyclable moisture absorption material. In this way, when the gas outside the box body 10 enters the inside of the box body 10, the moisture absorption device 30 can effectively absorb water vapor in the gas, reduce the risk of water vapor invading the inside of the box body 10, thereby The interior of the box body 10 can be kept dry, so that condensed water will not be generated and accumulated inside the box body 10. In addition, when the dry gas inside the box body 10 is discharged to the outside of the box body 10, it can take away the moisture accumulated in the hygroscopic material, so that the hygroscopic core 32 is restored to a dry state, so that the hygroscopic device 30 can maintain good hygroscopic performance and play a role in the battery device 100 for a long time. In addition, since the heating element 33 is fitted on the outer wall of the side plate 313 of the shell 31, the hygroscopic core 32 is heated by the heating element 33, which can promote the evaporation of moisture in the hygroscopic core 32, so that the hygroscopic core 32 can be quickly dried and the hygroscopic capacity is restored, thereby improving the reliability of the hygroscopic device 30.

[0065] In some cases, the desiccant device 30 is disposed in the vent hole 13 on the box body 10, with one bottom plate 312 facing the inside of the box body 10 and the other bottom plate 312 facing the outside of the box body 10. The two bottom plates 312 can be flush with the wall of the box body 10 or protrude or retracted into the wall of the box body 10, and the side plate 313 is arranged to fit the hole wall of the vent hole 13.

[0066] In some embodiments, please refer to Figure 3 , Figure 4 and Figure 5 The air flow channel 3131 surrounded by the side plate 313 is cylindrical.

[0067] The side plate 313 has a certain curvature in the circumferential direction of the air flow channel 3131 and surrounds a hollow circular tube, and the internal space of the circular tube forms the air flow channel 3131 .

[0068] The shell 31 is designed to guide the gas to flow along a specific path so that the gas is in full contact with the moisture-absorbing core 32. With the above design, on the one hand, the inner wall of the side panel 313 is relatively smooth, which can avoid dust accumulation and blockage, and because the inner wall of the side panel 313 has no corner structure, it can also reduce the resistance to gas flow, thereby better guiding the gas flow. On the other hand, the airflow channel 3131 is designed as a cylindrical structure, which has higher space utilization, can occupy a smaller external space and provide a larger accommodation space for the moisture-absorbing core 32.

[0069] It can be understood that in some embodiments, the side panel 313 can be a plurality of straight panels, and the plurality of straight panels together form a cube, a rectangular parallelepiped or other special-shaped air flow channel 3131 .

[0070] In some embodiments, please refer to Figure 3 , Figure 4 and Figure 5 The side panels 313 form a cylindrical air flow channel 3131 , and the moisture-absorbing core 32 is designed as a cylindrical structure adapted to the air flow channel 3131 . The moisture-absorbing core 32 is filled in the air flow channel 3131 and fits tightly with the inner wall of the side panels 313 .

[0071] The specific shape of the absorbent core 32 is related to the type of absorbent material, packaging structure or support structure.

[0072] The above design is helpful to increase the filling rate of the moisture absorbent core 32 in the air flow channel 3131, thereby improving the moisture absorption performance of the moisture absorbent device 30. At the same time, the moisture absorbent core 32 can also provide reliable support for the shell 31, and the moisture absorbent core 32 is not easy to shake.

[0073] It can be understood that in some other embodiments, the moisture-absorbent core 32 can also be designed as a cube, a rectangular parallelepiped or other special-shaped structures, and a gap can be retained between the moisture-absorbent core 32 and the inner wall of the side panel 313.

[0074] In some embodiments, please refer to Figure 3 , Figure 5 and Fig.11 The side plates 313 form a cylindrical air flow channel 3131 , and the bottom plate 312 is provided with a plurality of air holes 311 , which are spaced around the center of the bottom plate 312 .

[0075] The center of the bottom plate 312 can be understood as the center position of the bottom plate 312 in the geometric structure. For example, for a circular bottom plate 312, the center is the center of the bottom plate 312, and for a square bottom plate 312, the center is the intersection of two diagonals on the bottom plate 312. The center of the bottom plate 312 is generally opposite to the axis of the airflow channel 3131. The multiple air holes 311 on the bottom plate 312 can be arranged uniformly or non-uniformly around the center. Optionally, in a specific embodiment, the bottom plate 312 is a circular flat plate, and a plurality of air holes 311 are arranged on the bottom plate 312. The plurality of air holes 311 are arranged at intervals around the center of the bottom plate 312, and the spacing between two adjacent air holes 311 is equal.

[0076] By adopting the above design, the number of air holes 311 is increased, and the gas can flow evenly into the air flow channel 3131 from multiple air holes 311. The gas flow path is reasonable, so that the gas can fully contact with the moisture-absorbing core 32 in a shorter time, which is beneficial to improving the moisture absorption efficiency and moisture absorption performance of the moisture absorption device 30.

[0077] It can be understood that in some other embodiments, depending on the different structures of the bottom plate 312 and the moisture-absorbent core 32, the air holes 311 can also be arranged in other ways. For example, the air flow channel 3131 can be designed as a rectangular parallelepiped shape, and the multiple air holes 311 on the bottom plate 312 can be arranged in an array with reference to the structure of the air flow channel 3131.

[0078] In some embodiments, please refer to Figure 3 , Figure 4 and Figure 5 The side panel 313 includes two opposite ends in the extension direction Y of the air flow channel 3131, and the shell 31 also includes an extension plate 314 arranged at both ends of the side panel 313, the extension plate 314 is vertically connected to the outer wall of the side panel 313, and the outer edge of the extension plate 314 is connected to the outer edge of the bottom plate 312.

[0079] The extension plate 314 and the side plate 313 may be an integral structure or a split structure. The extension plate 314 is arranged along the circumference of the side plate 313. The extension plate 314 may be an integral annular flat plate, or the number of the extension plates 314 may be multiple and arranged at intervals along the circumference of the side plate 313. The inner edge of the extension plate 314 is flush with the inner wall of the side plate 313, and protrudes from the outer wall of the side plate 313 along the radial direction X of the air flow channel 3131, so as to avoid affecting the flow of gas into or out of the housing 31. The outer edge of the extension plate 314 is flush with the outer edge of the bottom plate 312 to improve the connection and fixing effect between the extension plate 314 and the bottom plate 312.

[0080] In particular, the extension plate 314 and the bottom plate 312 can be fixedly connected by bonding, welding, snap connection, locking connection, etc. In order to better connect and fix the extension plate 314 and the bottom plate 312, the size of the bottom plate 312 is larger than the cross-sectional size of the airflow channel 3131 at the end of the side plate 313, so that the bottom plate 312 can cover the inlet and outlet of the airflow channel 3131 and contact the extension plate 314.

[0081] In some cases, please refer to Figure 2 , Figure 6 and Fig.10 The moisture absorption device 30 is arranged in the ventilation hole 13 on the box body 10 or in the installation channel 41 of the contoured structure 40. Correspondingly, a mounting groove 5 for accommodating the extension plate 314 can be arranged at the opening of the ventilation hole 13 or the opening of the installation channel 41.

[0082] The above design is helpful to reduce the difficulty of assembling the housing 31, and since the extension plate 314 can support the bottom plate 312, the two can maintain a stable connection, so that the provision of the extension plate 314 is also helpful to improve the overall strength of the housing 31. In some cases, the moisture absorption device 30 is installed in the box body 10 or the internal structure of the box body 10, and at the installation position of the moisture absorption device 30, a mounting groove 5 is designed to accommodate the extension plate 314, and the extension plate 314 also has the function of auxiliary positioning.

[0083] It is understandable that in some other embodiments, the shell 31 can also be designed as an integrated spherical structure, with multiple air holes 311 dispersedly arranged at different positions of the shell 31, and the moisture-absorbent core 32 filling the entire internal space of the shell 31.

[0084] In some embodiments, the heating element 33 is a heating film.

[0085] For example, the side plate 313 is surrounded by a hollow circular tube, and the heating film is arranged on the outer wall of the side plate 313 in a circumferential direction around the side plate 313. When the structure of the side plate 313 allows, the heating film can cover the entire outer wall of the side plate 313, or, in some cases, limited by the structure of the side plate 313 and the moisture-absorbing core 32, or limited by the requirements of processing accuracy, the heating film can cover a partial position of the side plate 313 in the extension direction Y of the airflow channel 3131.

[0086] The heating film at least includes a heating structure and an insulating layer. The heating structure is used to convert electrical energy into thermal energy. The heating structure includes but is not limited to metal wires, such as copper wires, aluminum wires, nickel wires, etc. The heating structure can be combined into a heating layer and attached to the insulating layer, or the heating structure can be directly embedded in the insulating layer. The insulating layer is used to provide the necessary physical protection and insulation isolation for the heating structure. The insulating layer is generally made of materials that are resistant to high temperatures and have good insulation properties.

[0087] On the one hand, the heating film has good flexibility, which makes it easy to cover various curved and irregular surfaces, and the heating film can evenly heat the hygroscopic core 32 to avoid local overheating problems. On the other hand, when the heating film is arranged on the outer wall of the side plate 313, the side plate 313 isolates the heating film from the hygroscopic core 32, which can reduce the risk of short circuit of the heating film, and the heating film can heat the entire hygroscopic core 32 in the circumferential direction of the side plate 313, which is beneficial to improve the heating uniformity of the heating film, thereby improving the heating efficiency.

[0088] It can be understood that in some other embodiments, a heating film can be arranged in the shell 31 so that the heating film fits the inner wall of the side plate 313, so that the side plate 313 can be used to provide protection for the heating film and the risk of scratching the heating film can be reduced.

[0089] In some embodiments, the heating film is bonded to the side panel 313 .

[0090] For example, adhesive can be provided on the outer wall of the side plate 313 or on the surface of the heating film, and the heating film can be attached to the side plate 313. The adhesive can be ordinary double-sided adhesive or liquid glue, or thermal conductive adhesive. Optionally, in a specific embodiment, the heating film includes a thermal conductive adhesive layer, and the heating film is bonded to the outer wall of the side plate 313.

[0091] With the above design, the heating film can be stably fixed on the side plate 313 , and the heating film is tightly connected to the side plate 313 , so that the heat generated by the heating film can be better transferred to the moisture-absorbing core 32 .

[0092] It is understood that in some embodiments, the heating film can also be fixed on the side plate 313 by a mechanical structure such as a pressing plate. In some other embodiments, the heating element 33 can also be a heating plate or a heating tube disposed on the side plate 313 or integrated in the side plate 313.

[0093] In some embodiments, the battery device 100 further includes a temperature sensor disposed in the housing 10, and the temperature sensor is used to detect the gas temperature inside the housing 10. The temperature sensor and the heating element 33 are also connected to the battery management system, and the battery management system can obtain the temperature information detected by the temperature sensor, and control the opening or closing of the heating element 33 based on the temperature information. Specifically, when the gas temperature inside the housing 10 is lower than the preset value, the gas has a limited drying effect on the hygroscopic core 32. During the exhaust process, the heating element 33 can be controlled to be turned on, and the heating element 33 is used to assist in heating the hygroscopic core 32 to promote the rapid evaporation of the moisture in the hygroscopic core 32. When the gas temperature inside the housing 10 is higher than the preset value or the exhaust stops, the heating element 33 can be controlled to be turned off to avoid the heating element 33 from burning dry.

[0094] In some embodiments, please refer to Figure 4 , Figure 5 and Fig.12 The moisture absorbing device 30 also includes a waterproof breathable membrane 34 disposed in the shell 31 . The waterproof breathable membrane 34 is located between the moisture absorbing core 32 and the bottom plate 312 . The waterproof breathable membrane 34 at least covers the air holes 311 .

[0095] The waterproof breathable membrane 34 is a thin film made of a polymer material, and has a uniform microporous structure on the waterproof breathable membrane 34, which allows gas molecules to pass through while preventing liquid water molecules from passing through. For example, the waterproof breathable membrane 34 can be a PTFE (Polytetrafluoroethylene) membrane or a PE (Polyethylene) membrane, but is not limited thereto.

[0096] The housing 31 includes a side plate 313 and two bottom plates 312 , and a waterproof breathable membrane 34 is disposed on the inner surface of the two bottom plates 312 .

[0097] A waterproof breathable membrane 34 is provided on the side close to the outside of the housing 10, which can prevent liquid water and pollutants in the environment from entering the inside of the housing 31, while allowing gas to enter and exit the housing 31, so that the moisture-absorbing core 32 can maintain good moisture absorption performance. When the moisture-absorbing core 32 is saturated with water, the liquid water absorbed by the moisture-absorbing core 32 may seep out and cause water accumulation in the housing 31. The waterproof breathable membrane 34 is provided on the side close to the inside of the housing 10, which can block the water accumulation in the housing 31 in the housing 31, further reducing the risk of water vapor intruding into the inside of the housing 10, thereby improving the reliability of the moisture-absorbing device 30.

[0098] In some embodiments, the waterproof breathable membrane 34 covers the entire inner wall of the bottom plate 312 .

[0099] The entire inner wall of the bottom plate 312 refers to the portion of the bottom plate 312 exposed in the air flow channel 3131 , and the waterproof breathable membrane 34 can be fittedly arranged on the inner wall of the bottom plate 312 .

[0100] The above design is helpful to improve the covering effect of the waterproof breathable membrane 34 at the vent hole 311, thereby ensuring that the waterproof breathable membrane 34 can function normally.

[0101] It can be understood that in some embodiments, the waterproof breathable membrane 34 may be provided only in the area where the breathable holes 311 are provided.

[0102] In some embodiments, please refer to Figure 4 , Figure 5 and Fig.12 The side plate 313 includes two opposite ends in the extension direction Y of the air flow channel 3131, and the shell 31 also includes an extension plate 314 arranged at both ends of the side plate 313, the extension plate 314 is vertically connected to the outer wall of the side plate 313, and the extension plate 314 is arranged around the circumference of the side plate 313, the outer edge of the extension plate 314 is connected to the outer edge of the bottom plate 312, and a accommodating groove 3141 is arranged on one side of the extension plate 314 connected to the bottom plate 312, and the waterproof breathable membrane 34 is arranged in the accommodating groove 3141 and is fixed between the extension plate 314 and the bottom plate 312.

[0103] The extension plate 314 is a flat plate with a certain thickness. A receiving groove 3141 is provided on the surface of the extension plate 314, and the receiving groove 3141 is connected to the air flow channel 3131. The size of the waterproof breathable membrane 34 is larger than the inlet and outlet sizes of the air flow channel 3131. The waterproof breathable membrane 34 can be clamped between the extension plate 314 and the bottom plate 312.

[0104] With the above design, the waterproof breathable membrane 34 is installed at an accurate position and is not easily displaced, which further improves the reliability of the moisture absorbing device 30 .

[0105] In some embodiments, the desiccant device 30 is disposed in the vent hole 13, a bottom plate 312 of the desiccant device 30 faces the outside of the box body 10, and the vent holes 311 on the bottom plate 312 are used to connect to the outside of the box body 10, and another bottom plate 312 of the desiccant device 30 faces the inside of the box body 10, and the vent holes 311 on the bottom plate 312 are used to connect to the inside of the box body 10.

[0106] Please refer to Figure 2 , Figure 3 and Figure 6 In a specific embodiment, the desiccant device 30 is disposed in the vent hole 13 and includes a first bottom plate 312a and a second bottom plate 312b, wherein the first bottom plate 312a faces the outside of the box body 10, and the vent holes 311 on the first bottom plate 312a are connected to the outside of the box body 10, and the second bottom plate 312b faces the inside of the box body 10, and the vent holes 311 on the second bottom plate 312b are connected to the inside of the box body 10.

[0107] The moisture absorption device 30 can replace the balancing valve and be directly arranged in the vent hole 13, and serve as a passage for gas to enter and exit the box body 10. The shell 31 can be fixed to the box body 10 by bonding, welding, snap connection, lock connection, interference fit, etc., wherein the interference fit refers to the interference connection between the shell 31 and the vent hole 13.

[0108] By adopting the above-mentioned design, the space occupied by the moisture absorption device 30 in the inner space of the box body 10 can be reduced, so that the box body 10 can provide more accommodating space for structures such as the battery cell 20.

[0109] In some embodiments, please refer to Figure 3 , Figure 7 and Figure 8 The desiccant device 30 is disposed inside the box body 10 , a bottom plate 312 of the desiccant device 30 abuts against the inner wall of the box body 10 and covers the vent 13 , and the vent 311 on the bottom plate 312 is used to connect to the vent 13 .

[0110] The moisture absorption device 30 can be independently arranged inside the box body 10, or can also be integrated into other structures inside the box body 10. A bottom plate 312 of the shell 31 abuts against the inner wall of the box body 10, and the bottom plate 312 at least covers the vent hole 13 to avoid a large gap between the moisture absorption device 30 and the vent hole 13, so that gas can enter and exit the box body 10 from the gap between the two. Further, the part of the bottom plate 312 exposed in the vent hole 13 is provided with a vent hole 311 to connect the inside of the shell 31 with the vent hole 13, and the part of the shell 31 away from the inner wall of the box body 10 is also provided with a vent hole 311 to connect the inside of the shell 31 with the inside of the box body 10. The shell 31 can be fixedly connected to the box body 10 by bonding, welding, snap connection, locking connection, etc.

[0111] With the above design, the box body 10 can provide protection for the moisture absorbing device 30 and reduce the risk of the moisture absorbing device 30 being damaged by impact and pressure.

[0112] In some embodiments, please refer to Figure 3 , Figure 7 and Figure 8 The battery device 100 also includes a contoured structure 40, which is used to replace the battery cell 20. The contoured structure 40 is arranged inside the box body 10 and one side of the contoured structure 40 is arranged in contact with the inner wall of the box body 10. The contoured structure 40 is provided with a mounting channel 41, and the moisture absorption device 30 is arranged in the mounting channel 41.

[0113] The profiling structure 40 is used to fix and support the battery cell 20 inside the box 10, or it can also be used to form an exhaust channel to guide the gas flow. The profiling structure 40 can have the same structure as the battery cell 20. For example, the profiling structure 40 can be a cylinder, a flat body, a cuboid, etc. The installation channel 41 runs through different sides of the profiling structure 40. The moisture absorption device 30 is arranged in the installation channel 41 and can be fixedly connected to the profiling structure 40 by bonding, snap connection, locking connection, interference fit, etc.

[0114] Optionally, in a specific embodiment, please refer to Figure 7 , Fig. 9 and Fig.10 The profiling structure 40 includes an outer shell and the outer shell is a rectangular parallelepiped structure. An installation channel 41 is set in the profiling structure 40 and passes through the opposite sides of the outer shell. One side of the outer shell is arranged to fit the inner wall of the box body 10. One end of the installation channel 41 faces the vent hole 13 on the box body 10, and the other end faces the inside of the box body 10. The moisture absorption device 30 is set in the installation channel 41 and is interference connected with the installation channel 41.

[0115] By adopting the above design, the space inside the box 10 can be better utilized, and the compactness of the assembly of the desiccant device 30 and other structures inside the box 10 can be improved. At the same time, the contoured structure 40 can also provide protection for the desiccant device 30.

[0116] It can be understood that in some embodiments, structures such as cross beams and longitudinal beams are further provided inside the box body 10 for improving the strength of the box body 10 , and the moisture absorption device 30 can be provided on the cross beams or longitudinal beams.

[0117] In some embodiments, the hygroscopic material includes at least one of silica gel, calcium chloride, montmorillonite, and silicon dioxide.

[0118] The above-mentioned hygroscopic material has good hygroscopic performance, can be used for a long time, and has low cost.

[0119] In some embodiments, the hygroscopic material is silica gel particles.

[0120] The silica gel particles can be spherical, cylindrical or other special-shaped structures, and their size can be determined according to design requirements. The silica gel particles can be directly filled in the housing 31, or can also be wrapped with filter paper or non-woven fabric and then arranged in the housing 31.

[0121] On the one hand, silica gel has good moisture absorption performance and stability, can be applied to most environmental conditions and meet the dehumidification requirements, on the other hand, silica gel particles are stacked in the shell 31, there are gaps between the particles, the gas can flow smoothly in the gaps, and the gas is in full contact with the silica gel particles during the flow process, thereby having a good moisture absorption effect and moisture absorption efficiency.

[0122] In one embodiment provided in this application, please refer to Figure 2 , Figure 3 and Figure 5The battery device 100 includes a housing 10 and a moisture absorbing device 30. The housing 10 is provided with a vent hole 13. The moisture absorbing device 30 is arranged in the vent hole 13. The moisture absorbing device 30 can serve as a passage for gas to enter and exit the housing 10 and can filter gas. The moisture absorbing device 30 includes a housing 31, a moisture absorbing core 32, a heating film and a waterproof breathable film 34. The housing 31 is provided with a plurality of breathable holes 311. Gas can enter and exit the housing 31 through the breathable holes 311. The moisture absorbing core 32 is arranged in the housing 31, and the moisture absorbing core 32 includes a recyclable moisture absorbing material. The moisture absorbing material can lock moisture in a physical manner. The heating film is arranged on the outer wall of the housing 31 and is arranged opposite to the moisture absorbing core 32. The heating film is used to heat the moisture absorbing core 32 to promote the evaporation of moisture in the moisture absorbing core 32. The waterproof breathable film 34 is arranged in the housing 31 and is used to cover the breathable holes 311. The waterproof breathable film 34 allows gas to pass through and prevents liquid water from passing through. The battery device 100 provided in the above embodiment can dry the gas entering the interior of the box 10 by arranging the desiccant device 30 in the vent hole 13 on the box 10, thereby reducing the risk of water vapor invading the interior of the box 10, thereby solving the technical problem that condensed water is easily generated and accumulated inside the box 10. At the same time, during the process of exhausting the inside of the box 10 to the outside, the moisture accumulated in the desiccant core 32 can also be taken away, so that the desiccant core 32 is restored to a dry state, so that the desiccant device 30 can maintain good desiccant performance and play a role in the battery device 100 for a long time. In addition, the desiccant device 30 is directly embedded in the wall of the box 10, which can reduce the occupation of the internal space of the box 10, so that the box 10 can provide more accommodation space for structures such as the battery cell 20.

[0123] In one embodiment provided in this application, please refer to Figure 3 , Figure 7 and Figure 8The battery device 100 includes a box body 10, a contoured structure 40 arranged inside the box body 10, and a desiccant device 30, wherein the box body 10 is provided with a vent hole 13, the vent hole 13 can be used as a channel for gas to enter and exit the box body 10, the desiccant device 30 is arranged in the installation channel 41 of the contoured structure 40 and is connected with the vent hole 13, and the desiccant device 30 can filter the gas flowing through the vent hole 13. The desiccant device 30 includes a shell 31, a desiccant core 32, a heating film and a waterproof breathable membrane 34. The shell 31 is provided with a plurality of air holes 311, through which gas can enter and exit the shell 31. The desiccant core 32 is arranged in the shell 31, and the desiccant core 32 includes a recyclable desiccant material. The heating film is arranged on the outer wall of the shell 31 and is arranged opposite to the desiccant core 32. The heating film is used to heat the desiccant core 32 to promote the evaporation of water in the desiccant core 32. The waterproof breathable membrane 34 is arranged in the shell 31 and is used to cover the air holes 311. The waterproof breathable membrane 34 allows gas to pass through but prevents liquid water from passing through. The battery device 100 provided in the above embodiment can dry the gas entering the interior of the box body 10 by arranging a desiccant device 30 connected to the vent hole 13 in the box body 10, thereby reducing the risk of water vapor invading the interior of the box body 10, thereby solving the technical problem that condensed water is easily generated and accumulated in the box body 10. At the same time, during the process of exhausting the interior of the box body 10 to the outside, the moisture accumulated in the desiccant core 32 can also be taken away, so that the desiccant core 32 is restored to a dry state, so that the desiccant device 30 can maintain good desiccant performance and play a role in the battery device 100 for a long time. In addition, the desiccant device 30 is arranged in the box body 10, and the box body 10 can provide protection for the desiccant device 30, which can also reduce the risk of the desiccant device 30 being damaged by impact and pressure, thereby increasing the service life of the desiccant device 30.

[0124] An embodiment of the second aspect of the present application provides an energy storage device, including the battery device 100 in the first aspect, and the battery device 100 is used to store or provide electrical energy.

[0125] The energy storage device provided in the embodiment of the present application improves the reliability and safety of the energy storage device by adopting the battery device 100 in the first aspect.

[0126] An embodiment of the third aspect of the present application provides an electrical device, including the battery device 100 in the first aspect, and the battery device 100 is used to store or provide electrical energy.

[0127] The electric device provided in the embodiment of the present application improves the reliability and safety of the electric device by adopting the battery device 100 in the first aspect.

[0128] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A box body, used to accommodate the battery cells, and the box body is provided with vent holes; A moisture absorbing device comprises a shell, a waterproof breathable membrane, a moisture absorbing core and a heating element, wherein the shell comprises two bottom plates, a side plate connected between the two bottom plates and two extension plates, the two bottom plates are provided with air holes, the side plates are used to enclose a cylindrical air flow channel, the two extension plates are respectively connected to the opposite ends of the side plates and are arranged around the circumference of the side plates, the extension plates are provided with a receiving groove, the waterproof breathable membrane is partially arranged in the receiving groove, the bottom plate is connected to the extension plates, and the waterproof breathable membrane is clamped between the extension plates and the bottom plate, The waterproof breathable membrane can cover the air holes on the bottom plate, the hygroscopic core is filled in the air flow channel and fits with the inner wall of the side plate, the hygroscopic core includes a recyclable hygroscopic material, the heating element is a heating film, the heating film is surrounded by the outer wall of the side plate and is used to heat the hygroscopic core, the hygroscopic device is arranged inside the box or embedded in the wall of the box, the hygroscopic device blocks the vents and connects the inside and outside of the box through the vents, and the hygroscopic device is used to filter the gas passing through the vents.

2. The battery device according to claim 1, characterized in that The bottom plate is provided with a plurality of ventilation holes, and the plurality of ventilation holes are arranged at intervals around the center of the bottom plate.

3. The battery device according to claim 1, characterized in that: The desiccant device is arranged in the ventilation hole, one of the bottom plates of the desiccant device faces the outside of the box, and the ventilation hole on the bottom plate is used to connect to the outside of the box, and the other bottom plate of the desiccant device faces the inside of the box, and the ventilation hole on the bottom plate is used to connect to the inside of the box.

4. The battery device according to claim 1, wherein: The desiccant device is arranged inside the box body, a bottom plate of the desiccant device abuts against the inner wall of the box body and covers the vent hole, and the vent hole on the bottom plate is connected to the vent hole.

5. The battery device according to claim 4, characterized in that: The battery device also includes a contoured structure, which is used to replace the battery cell. The contoured structure is arranged inside the box and one side of the contoured structure is arranged in contact with the inner wall of the box. The contoured structure is provided with an installation channel, and the moisture absorption device is arranged in the installation channel.

6. The battery device according to any one of claims 1 to 5, characterized in that: The hygroscopic material includes at least one of silica gel, calcium chloride, montmorillonite and silicon dioxide.

7. An energy storage device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 6, wherein the battery device is used to store or provide electrical energy.

8. An electrical device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 6, wherein the battery device is used to store or provide electrical energy.

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