Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device.The battery device comprises a box body and battery monomers, the box body is provided with a containing cavity, the box body comprises a bottom plate, a heat exchange plate is arranged on the side, facing the containing cavity, of the bottom plate, the battery monomers are arranged in the containing cavity, and the sides, facing the heat exchange plate, of the battery monomers are sealed with the heat exchange plate; an anti-explosion valve is arranged on one side, far away from the pole, of the battery monomer, and is communicated with the first closed space. According to the scheme provided by the invention, smoke leakage and diffusion are effectively avoided, so that the smoke is also prevented from being in contact with the electrical connecting pieces at the tops of the battery monomers.

Description

Technical Field

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

[0002] In the production of lithium batteries, explosion-proof valves are typically installed on the battery pack to allow gases inside the battery to escape.

[0003] The explosion-proof valves in related technologies can cause flue gas leakage during use. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can solve the problem of smoke leakage caused by the use of explosion-proof valves.

[0005] To address the aforementioned technical problems, in a first aspect, this application proposes a battery device, comprising:

[0006] The housing has a receiving cavity, the housing includes a bottom plate, and a heat exchange plate is provided on the side of the bottom plate facing the receiving cavity. The heat exchange plate and the bottom plate are connected to form a first enclosed space.

[0007] A battery cell is disposed in the receiving cavity, and the side of the battery cell facing the heat exchange plate is sealed to the heat exchange plate; an explosion-proof valve is provided on the side of the battery cell away from the electrode post, and the explosion-proof valve is connected to the first enclosed space.

[0008] In the technical solution of this application embodiment, when a battery cell fails, the explosion-proof valve sprays out combustible smoke, which flows into the first enclosed space, effectively preventing smoke leakage and diffusion, and thus also preventing the smoke from contacting the electrical connectors on the top of the battery cell.

[0009] In some embodiments, the battery device further includes a cover, which is sealed on the side of the heat exchange plate away from the base plate, with the battery cell partially located inside the cover and the terminal post located outside the cover, the cover and the battery cell forming a second enclosed space.

[0010] In some embodiments, the heat exchange plate is provided with a first opening, the side of the battery cell away from the electrode covers the first opening, and the explosion-proof valve communicates with the first enclosed space through the first opening. This allows the flue gas discharged from the explosion-proof valve to flow into the first enclosed space through the first opening.

[0011] In some embodiments, the battery device further includes an adhesive layer disposed between the battery cell and the heat exchange plate;

[0012] The adhesive layer has a notch, and the explosion-proof valve communicates with the first opening through the notch. This facilitates the bonding of the battery cells to the heat exchange plate.

[0013] In some embodiments, the cover is provided with a second opening, and the end of the battery cell facing the heat exchange plate passes through the second opening and is located inside the cover, and the battery cell is sealed with the second opening.

[0014] In some embodiments, the battery device further includes a sealing ring disposed between the second opening and the battery cell. This improves the sealing between the second opening and the battery cell, thereby ensuring the sealing of the second enclosed space.

[0015] In some embodiments, an insulating layer is provided on the cover, the insulating layer being located around the second opening. This prevents electrical conductivity between the cover and the battery cell.

[0016] In some embodiments, the battery cell passes through the second opening and is located within the cover, with the side of the battery cell bonded or welded to the periphery of the second opening. This improves the seal between the battery cell and the second opening.

[0017] In some embodiments, the enclosure is a rigid structure, and / or a fire-resistant layer is provided on the enclosure. This improves the overall strength of the enclosure and its fire resistance.

[0018] In some embodiments, the cover is welded to the side of the heat exchange plate opposite to the base plate, and / or,

[0019] The cover is bonded to the side of the heat exchange plate opposite to the base plate, and / or,

[0020] The cover is detachably connected to the side of the heat exchange plate opposite to the base plate. This improves the sealing performance between the cover and the heat exchange plate.

[0021] Secondly, this application proposes an electrical device, including a battery device as described in any one of the embodiments of this application.

[0022] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments described below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0024] Figure 1 This is a schematic diagram of the structure of an electrical device provided in some embodiments of this application;

[0025] Figure 2 This application provides schematic diagrams of the battery structure for some embodiments.

[0026] Figure 3 This is a schematic diagram of the structure of a battery cell provided in some embodiments of this application;

[0027] Figure 4 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0028] Figure 5 A schematic diagram of a heat exchange plate after deformation, provided in some embodiments of this application;

[0029] Figure 6 This is a schematic diagram of a battery device provided for some embodiments of this application from another perspective.

[0030] The reference numerals in the detailed embodiments are as follows:

[0031] 1000, vehicles;

[0032] 100. Battery; 200. Controller; 300. Motor;

[0033] 110. Box body; 111. First part; 112. Second part; 120. Battery cell pack; 121. Housing; 122. End cap; 123. Electrode assembly;

[0034] 10. Housing; 11. Battery cell; 12. Adhesive layer; 124. Notch; 13. Heat exchange plate; 131. First opening; 14. Base plate; 15. Cover; 151. Second opening; 16. First enclosed space; 17. Second enclosed space. Detailed Implementation

[0035] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0037] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0040] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0041] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0042] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0043] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0044] In the production of lithium batteries, explosion-proof valves are usually installed on the battery pack to allow the gas inside the battery to escape to the outside.

[0045] To mitigate the risks posed by the opening of the explosion-proof valve, it is typically positioned at the bottom of the battery, separating it from the terminals at the top. Ideally, when the bottom valve opens, the flammable gas ejected from the battery moves downwards. The battery, adhesive coating, cold plate, and base plate form a closed space (gas collection chamber), sealing the gas within and preventing it from contacting the terminals, thus reducing the risk of explosion. However, in reality, the gas ejected from the explosion-proof valve exerts significant force on the adhesive coating and cold plate. Due to the limited mechanical strength of the adhesive coating and the fact that the cold plate is mostly suspended, the gas can cause the battery to detach from the adhesive and the cold plate to deform. This compromises the seal of the gas collection chamber, allowing the gas to diffuse to the outside and reach the terminals.

[0046] Based on the above considerations, in order to solve the problem of smoke leakage caused by the use of explosion-proof valves, a battery device is designed. The battery device includes a housing, battery cells, and a cover. The housing has a receiving cavity and includes a bottom plate. A heat exchange plate is arranged on the side of the bottom plate facing the receiving cavity. The heat exchange plate and the bottom plate are connected to form a first closed space. The battery cells are arranged in the receiving cavity, and the side of the battery cells facing the heat exchange plate is sealed with the heat exchange plate. An explosion-proof valve is arranged on the side of the battery cells away from the electrode post, and the explosion-proof valve is connected to the first closed space.

[0047] When a battery cell fails during use, the explosion-proof valve releases flammable fumes, which flow into the first enclosed space, effectively preventing fumes from leaking and spreading, and thus preventing the fumes from coming into contact with the electrical connections on the top of the battery cell.

[0048] In this application, "battery" refers to a single physical module comprising one or more individual battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery pack, etc. Batteries can serve as a power source or power system for electrical devices, which helps improve the overall performance of the battery and facilitates its widespread adoption.

[0049] The aforementioned electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0050] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0051] 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 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 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 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0052] In some embodiments of this application, the battery 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.

[0053] Please refer to Figure 2 , Figure 2This is an exploded view of a battery 100 provided in some embodiments of this application. The battery 100 includes a housing body 110 and a battery cell assembly 120, with the battery cell assembly 120 housed within the housing body 110. The housing body 110 provides a accommodating space for the battery cell assembly 120, and can employ various structures. In some embodiments, the housing body 110 may include a first portion 111 and a second portion 112, which overlap each other, collectively defining a accommodating space for accommodating the battery cell assembly 120. The second portion 112 may be a hollow structure with one open end, and the first portion 111 may be a plate-like structure, covering the open side of the second portion 112 so that the first portion 111 and the second portion 112 jointly define the accommodating space; alternatively, the first portion 111 and the second portion 112 may both be hollow structures with one open side, with the open side of the first portion 111 covering the open side of the second portion 112. Of course, the box body 110 formed by the first part 111 and the second part 112 can be of various shapes, such as cylinder, cuboid, etc.

[0054] In battery 100, there can be multiple battery cell groups 120. These multiple battery cell groups 120 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that the multiple battery cell groups 120 are connected in both series and parallel. Multiple battery cell groups 120 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cell groups 120 is housed within the casing 110. Alternatively, battery 100 can also consist of multiple battery cell groups 120 first connected in series, parallel, or in a mixed configuration to form a battery module, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within the casing 110. Battery 100 may also include other structures; for example, battery 100 may also include a busbar component for electrical connection between the multiple battery cell groups 120.

[0055] Each battery cell 120 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 120 can be cylindrical, flat, cuboid, or other shapes.

[0056] like Figure 3 As shown, the battery cell pack 120 may include a housing, an electrode assembly 123, and electrode terminals. The housing includes a casing 121 and an end cap 122. The casing 121 has an opening, and the end cap 122 closes the opening to isolate the internal environment of the battery cell pack 120 from the external environment.

[0057] The housing 121 is a component used to cooperate with the end cap 122 to form the internal environment of the battery cell assembly 120, wherein the formed internal environment can accommodate the electrode assembly 123, electrolyte, and other components. The housing 121 and the end cap 122 can be independent components. The housing 121 can have various shapes and sizes. Specifically, the shape of the housing 121 can be determined according to the specific shape and size of the electrode assembly 123. The housing 121 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0058] End cap 122 refers to a component that covers the opening of housing 121 to isolate the internal environment of battery cell pack 120 from the external environment. The shape of end cap 122 can be adapted to the shape of housing 121 to fit it. Optionally, end cap 122 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 122 is not easily deformed under pressure and impact, giving battery cell pack 120 higher structural strength and improved reliability. Functional components such as electrode terminals can be provided on end cap 122. Electrode terminals can be used for electrical connection with electrode assembly 123 to output or input electrical energy to battery cell pack 120. The material of end cap 122 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose special limitations on this. In some embodiments, an insulating structure may be provided on the inner side of the end cap 122. The insulating structure can be used to isolate the electrical connection components within the housing 121 from the end cap 122 to reduce the risk of short circuits. For example, the insulating structure may be made of plastic, rubber, etc.

[0059] Electrode assembly 123 is the component in the battery cell assembly 120 where electrochemical reactions occur. The housing 121 may contain one or more electrode assemblies 123. The electrode assembly 123 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 to separate them and prevent internal short circuits. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 123, while the portions without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or at opposite ends. During the charging and discharging of the battery 100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop. Furthermore, the electrode assembly 123 can be a wound structure or a stacked structure.

[0060] In some embodiments, the battery cell pack 120 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell pack 120 reaches a threshold.

[0061] According to some embodiments of this application, Figure 4 This is a schematic diagram of the battery device in this application. Figure 5 This is a schematic diagram of the heat exchange plate in this application after deformation. Figure 6 This is a schematic diagram of the battery device in this application from another perspective. Figures 4-6 As shown, this application provides a battery device, which includes a housing 10 and a battery cell 11. The housing 10 has a receiving cavity and includes a bottom plate 14. A heat exchange plate 13 is disposed on the side of the bottom plate 14 facing the receiving cavity. The heat exchange plate 13 and the bottom plate 14 are connected to form a first enclosed space 16. The battery cell 11 is disposed in the receiving cavity, and the side of the battery cell 11 facing the heat exchange plate 13 is sealed to the heat exchange plate 13. An explosion-proof valve is disposed on the side of the battery cell 11 away from the terminal post, and the explosion-proof valve is connected to the first enclosed space 16.

[0062] In this embodiment, the upper side of the box 10 is an open structure, and the inside of the box 10 forms a receiving cavity. The bottom plate 14 on the box 10 has a U-shaped structure. The heat exchange plate 13 is fixed to the bottom plate 14, and the heat exchange plate 13 and the bottom plate 14 are sealed together. The heat exchange plate 13 and the bottom plate 14 form a first closed space 16.

[0063] In this embodiment, the heat exchange plate 13 can be a water-cooled plate, which can be sealed and welded together with the base plate 14, or the water-cooled plate and the base plate can be sealed together by bolts. The specific method can be determined according to the actual situation, and this embodiment does not limit it.

[0064] In this embodiment, after the battery cell 11 is placed in the receiving cavity, the side of the battery cell 11 facing the heat exchange plate 13 is sealed and connected to the heat exchange plate 13. For example, the side of the battery cell 11 facing the heat exchange plate 13 is bonded to the heat exchange plate 13 with sealant, or the side of the battery cell 11 facing the heat exchange plate 13 is sealed and snapped together with the heat exchange plate 13. The specific method can be determined according to the actual situation, and this embodiment does not limit it.

[0065] When a single battery cell fails, refer to Figure 4 As shown, the explosion-proof valve sprays out combustible smoke, which flows into the first enclosed space 16, effectively preventing smoke leakage and diffusion, and thus also preventing the smoke from contacting the electrical connectors on the top of the battery cell.

[0066] According to some embodiments of this application, such as Figure 4 As shown, the battery device also includes a cover 15, which is disposed on the side of the heat exchange plate 13 away from the bottom plate 14. The battery cell 11 is partially located inside the cover 15, and the terminal post is located outside the cover 15. The cover 15 and the battery cell 11 form a second enclosed space 17.

[0067] refer to Figure 4 As shown, the cover 15 is disposed on the upper side of the heat exchange plate 13. The cover 15 can be welded to the heat exchange plate 13, or the cover 15 and the heat exchange plate 13 can be connected together by bolts. In this case, a sealed structure is formed between the cover 15 and the heat exchange plate 13. When the battery cell 11 is partially located inside the cover 15, the side of the battery cell 11, the heat exchange plate 13, and the cover 15 form a second enclosed space 17.

[0068] When a single battery cell fails, refer to Figure 4 As shown, the explosion-proof valve ejects combustible fumes, which flow into the first enclosed space 16; (Reference) Figure 5 As shown, when the heat exchange plate 13 deforms, the side of the battery cell 11, the heat exchange plate 13 and the cover 15 still form a second closed space 17. At this time, the flue gas will flow into the second closed space 17 under the restriction of the cover 15, which effectively avoids the leakage and diffusion of flue gas, and also avoids the flue gas from contacting the electrical connection parts on the top of the battery cell.

[0069] According to some embodiments of this application, such as Figure 4 As shown, a first opening 131 is provided on the heat exchange plate 13. The side of the battery cell 11 away from the terminal block covers the first opening 131. The explosion-proof valve is connected to the first enclosed space 16 through the first opening 131.

[0070] refer to Figure 4 As shown, in this embodiment, the first opening 131 is located below the battery cell 11. After the battery cell 11 is fixed to the heat exchange plate 13, the battery cell 11 and the heat exchange plate 13 are sealed. At the same time, the bottom surface of the battery cell 11 covers the first opening 131. At this time, the first enclosed space 16 will not communicate with the outside through the first opening 131.

[0071] In this embodiment, the connection structure between the battery cell 11 and the heat exchange plate 13 can be referred to the above description, and will not be repeated here.

[0072] In this embodiment, after the battery cell 11 is fixed to the heat exchange plate 13, the explosion-proof valve on the battery cell 11 is connected to the first enclosed space 16 through the first opening 131. In this way, the flue gas discharged from the explosion-proof valve can flow into the first enclosed space 16 through the first opening 131.

[0073] According to some embodiments of this application, such as Figure 4 As shown, the battery device also includes an adhesive layer 12, which is disposed between the battery cell 11 and the heat exchange plate 13; at the same time, a notch 124 is provided on the adhesive layer 12, and the explosion-proof valve communicates with the first opening 131 through the notch 124.

[0074] In this embodiment, the adhesive layer 12 can be waterproof sealant, structural adhesive, etc. The specific type can be determined according to the actual situation, and this specification does not limit it in this embodiment.

[0075] In this embodiment, after the battery cell 11 and the heat exchange plate 13 are bonded together by the adhesive layer 12, the battery cell 11 and the heat exchange plate 13 are in a sealed state.

[0076] refer to Figure 4 As shown, the notch 124 on the adhesive layer 12 is directly opposite to the first opening 131. Of course, the notch 124 and the first opening 131 can also be staggered, as long as the notch 124 and the first opening 131 are connected.

[0077] In this embodiment, an adhesive layer 12 is provided between the battery cell 11 and the heat exchange plate 13, which makes it easier to stick the battery cell 11 to the heat exchange plate 13.

[0078] When a single battery cell fails, refer to Figure 4 As shown, the explosion-proof valve ejects combustible fumes, which flow through the notch 124 and the first opening 131 into the first enclosed space 16; Reference Figure 5 As shown, when the adhesive layer 12 delaminates and the heat exchange plate 13 deforms, the side of the battery cell 11, the heat exchange plate 13 and the cover 15 still form a second closed space 17. At this time, the second closed space 17 is connected to the first closed space 16, and the flue gas will flow into the first closed space 16 and the second closed space 17, further preventing the flue gas from leaking and spreading, and thus also preventing the flue gas from contacting the electrical connectors on the top of the battery cell 11.

[0079] According to some embodiments of this application, such as Figure 4 As shown, a second opening 151 is provided on the cover 15. The end of the battery cell 11 facing the heat exchange plate 13 passes through the second opening 151 and is located inside the cover 15. The battery cell 11 is sealed with the second opening 151.

[0080] In this embodiment, after the battery cell 11 passes through the second opening 151, the bottom surface of the battery cell 11 is connected to the heat exchange plate 13 through the adhesive layer 12. At this time, one end of the upper electrode of the battery cell 11 is located outside the cover 15.

[0081] Meanwhile, after the battery cell 11 passes through the second opening 151, the edge of the second opening 151 can be bonded to the side of the battery cell 11 by means of bonding, welding or other methods, thereby ensuring the sealing between the second opening 151 and the battery cell 11.

[0082] refer to Figure 4As shown, when the cover 15 is installed on the battery cell 11, the side of the battery cell 11 abuts against the edge of the second opening 151, thus limiting the displacement of the battery cell 11 under the constraint of the edge of the second opening 151.

[0083] According to some embodiments of this application, the battery device further includes a sealing ring (not shown in the figure) disposed between the second opening 151 and the battery cell 11.

[0084] In this embodiment, a sealing ring is provided at the second opening 151. When the battery cell 11 passes through the second opening 151, the side of the battery cell 11 abuts against the sealing ring. In this way, the sealing between the second opening 151 and the battery cell 11 can be improved, thereby ensuring the sealing of the second closed space.

[0085] According to some embodiments of this application, an insulating layer (not shown in the figure) is provided on the cover 15, which is located around the second opening 151.

[0086] The insulating layer in this embodiment can be made of rubber, plastic, etc., and the specific material can be determined according to the actual situation. This specification does not limit this embodiment.

[0087] In this embodiment, an insulating layer is provided around the second opening 151. When the battery cell 11 passes through the second opening 151 and is located inside the cover 15, the insulating layer at the second opening 151 contacts the side of the battery cell 11. In this way, when the battery cell 11 leaks current, it can prevent the cover 15 from conducting electricity with the battery cell 11.

[0088] According to some embodiments of this application, the battery cell 11 passes through the second opening 151 and is located inside the cover 15, and the side of the battery cell 11 is bonded or welded to the periphery of the second opening 151.

[0089] In this embodiment, the side of the battery cell 11 is connected to the second opening 151 by bonding or welding, which improves the sealing performance between the battery cell 11 and the second opening 151. It is understood that the battery cell 11 and the second opening 151 can also be connected by bolts; the specific connection can be determined according to the actual situation, and this embodiment does not limit this.

[0090] According to some embodiments of this application, the cover 15 is a rigid structure, and / or, a fire-resistant layer is provided on the cover 15.

[0091] In this embodiment, a rigid structure refers to a material capable of effectively resisting external impacts and reducing deformation, such as high-strength steel or aluminum alloy. The cover 15 in this embodiment is an overall rigid structure, which improves its overall strength.

[0092] In this embodiment, the material of the refractory layer can be siliceous refractory material, aluminosilicate refractory material, etc., and the specific material can be determined according to the actual situation. This embodiment does not limit this.

[0093] In this embodiment, a fire-resistant layer is provided on the cover 15, which can improve the fire resistance of the cover 15.

[0094] According to some embodiments of this application, such as Figure 4 As shown, the cover 15 is welded to the heat exchange plate 13 on the side away from the base plate 14, and / or the cover 15 is bonded to the heat exchange plate 13 on the side away from the base plate 14, and / or the cover 15 is detachably connected to the heat exchange plate 13 on the side away from the base plate 14.

[0095] In this embodiment, the detachable connection between the cover 15 and the heat exchange plate 13 includes: the cover 15 and the heat exchange plate 13 can be connected by bolts, or the cover 15 and the heat exchange plate 13 can be snapped together. When the cover 15 and the heat exchange plate 13 are detachably connected together, the cover 15 and the heat exchange plate 13 still form a sealed structure.

[0096] In this embodiment, the sealing performance between the cover 15 and the heat exchange plate 13 can be improved by welding, bonding or detachable connection.

[0097] This application also provides an electrical device, including a battery device as described in any of the embodiments of this application.

[0098] The specific structure of the battery device in this embodiment refers to the above embodiments. Since the power device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, include: The housing has a receiving cavity, the housing includes a bottom plate, and a heat exchange plate is provided on the side of the bottom plate facing the receiving cavity. The heat exchange plate and the bottom plate are connected to form a first enclosed space. A battery cell is disposed in the receiving cavity, and the side of the battery cell facing the heat exchange plate is sealed to the heat exchange plate; an explosion-proof valve is provided on the side of the battery cell away from the electrode post, and the explosion-proof valve is connected to the first enclosed space.

2. The battery device according to claim 1, characterized by The battery device also includes a cover, which is disposed on the side of the heat exchange plate away from the base plate. The battery cell is located inside the cover, and the terminal post is located outside the cover. The cover and the battery cell form a second enclosed space.

3. The battery device of claim 2, wherein, The heat exchange plate is provided with a first opening, and the side of the battery cell away from the electrode covers the first opening. The explosion-proof valve communicates with the first enclosed space through the first opening.

4. The battery device of claim 3, wherein The battery device further includes an adhesive layer disposed between the battery cell and the heat exchange plate; The adhesive layer has a notch, and the explosion-proof valve communicates with the first opening through the notch.

5. The battery device according to any one of claims 2 to 4, wherein The cover has a second opening, and the end of the battery cell facing the heat exchange plate passes through the second opening and is located inside the cover. The battery cell is sealed to the second opening.

6. The battery device of claim 5, wherein, The battery device also includes a sealing ring disposed between the second opening and the battery cell.

7. The battery device of claim 5, wherein An insulating layer is provided on the cover, and the insulating layer is located around the second opening.

8. The battery device of claim 5, wherein, The battery cell passes through the second opening and is located inside the cover, and the side of the battery cell is bonded or welded to the periphery of the second opening.

9. The battery device according to any one of claims 2 to 4, wherein The cover is a rigid structure, and / or a fire-resistant layer is provided on the cover.

10. The battery device according to any one of claims 2 to 4, wherein The cover is welded to the side of the heat exchange plate opposite to the base plate, and / or, The cover is bonded to the side of the heat exchange plate opposite to the base plate, and / or, The cover is detachably connected to the side of the heat exchange plate opposite to the base plate.

11. An electrical device, characterized by Includes the battery device as described in any one of claims 1 to 10.

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