Battery monomer, battery device and electric equipment

Abstract

The utility model relates to a battery single body, a battery device and electric equipment. The battery single body comprises a shell, the battery core assembly is positioned in the shell; the anti-explosion valve is arranged on the shell; the first insulating part is positioned between the inner wall of the shell and the battery core assembly; the first supporting piece is supported between the inner wall of the shell and the first insulating piece, the projection of the first supporting piece and the projection of the anti-explosion valve in the first direction are overlapped, and the first direction is the direction in which the battery cell assembly points to the anti-explosion valve; wherein the first supporting piece is provided with an airflow channel allowing airflow to flow to the anti-explosion valve, and the first insulating piece is provided with a first exhaust hole communicated with the airflow channel. According to the battery monomer, the risk that the battery cell assembly blocks the anti-explosion valve can be reduced, and the risk that the battery monomer explodes is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery cells, battery devices and electrical equipment. Background Technology

[0002] A battery assembly typically includes a battery case and individual battery cells. Each battery cell comprises a casing, a cover, and cell assemblies. The casing, in conjunction with the cover, forms the internal environment of the battery cell, where the cell assemblies, electrolyte, and other functional components are located. Generally, the cover is equipped with an explosion-proof valve. In the event of thermal runaway in the battery cell, the increased temperature and pressure of the internal gas can be released through the explosion-proof valve to prevent an explosion.

[0003] In related technologies, when a battery cell experiences thermal runaway, the cell assembly will expand and deform, which can easily cause the cell assembly to clog the explosion-proof valve and lead to an explosion. Utility Model Content

[0004] In view of the above problems, this application provides a battery cell, a battery device and an electrical device to reduce the risk of the cell assembly clogging the explosion-proof valve, thereby reducing the risk of the battery cell exploding.

[0005] In a first aspect, this application provides a battery cell, the battery cell comprising:

[0006] shell;

[0007] The battery cell assembly is located inside the casing;

[0008] Explosion-proof valve, the explosion-proof valve is installed on the housing;

[0009] The first insulating element is located between the inner wall of the housing and the cell assembly;

[0010] The first support member is supported between the inner wall of the housing and the first insulating member. The projection of the first support member and the explosion-proof valve in the first direction overlaps. The first direction is the direction from which the battery cell assembly points to the explosion-proof valve.

[0011] The first support member has an airflow channel that allows airflow to flow to the explosion-proof valve, and the first insulating member has a first exhaust port that communicates with the airflow channel.

[0012] In the aforementioned battery cell, since the first support member is supported between the inner wall of the outer casing and the first insulating member, the first insulating member can achieve insulation between the first support member and the cell assembly; moreover, the first support member can provide support between the inner wall of the outer casing and the cell assembly. Because the projections of the first support member and the explosion-proof valve in the first direction overlap, a portion of the structure of the first support member is located between the explosion-proof valve and the cell assembly along the first direction. Since the first support member is constructed with an airflow channel allowing airflow to the explosion-proof valve, and the first insulating member is constructed with a first vent hole communicating with the airflow channel, when thermal runaway occurs inside the battery cell, gas can flow into the airflow channel through the first vent hole, and then flow to the explosion-proof valve, thereby venting and relieving pressure on the battery cell through the explosion-proof valve. The portion of the structure of the first support member located between the explosion-proof valve and the cell assembly can effectively resist the expansion and deformation of the cell assembly towards the explosion-proof valve, thereby reducing the risk of the cell assembly clogging the explosion-proof valve and reducing the risk of the battery cell exploding.

[0013] In one embodiment, the first support member has a first end facing a first direction and a second end opposite to the first end;

[0014] The first end is connected to the inner wall of the outer casing, and the second end abuts against the battery cell assembly through the first insulating component.

[0015] In this embodiment, the first end is connected to the inner wall of the outer casing, and the second end abuts against the battery cell assembly through the first insulating member, so that the first support member can be stably supported between the outer casing and the battery cell assembly.

[0016] In one embodiment, the airflow channel includes a recess and a second exhaust port disposed on the bottom wall of the recess;

[0017] The cavity is recessed inward from the end of the first support member facing the first direction, and the cavity is connected to the first exhaust hole via the second exhaust hole.

[0018] In this embodiment, the airflow channel includes a concave cavity and a second exhaust port located on the bottom wall of the concave cavity, which allows gas to enter through the second exhaust port and collect in the concave cavity, facilitating the exhaust of gas through the concave cavity.

[0019] In one embodiment, there are multiple second exhaust holes, and the multiple second exhaust holes are spaced apart from each other.

[0020] When thermal runaway occurs within a single battery cell, multiple secondary vents facilitate rapid venting.

[0021] In one embodiment, the airflow channel passes through the first support member along the first direction, and the first exhaust port passes through the first insulating member along the first direction;

[0022] The projection of the explosion-proof valve in the first direction is at least partially located within the projection range of the outline of the airflow channel in the first direction.

[0023] In this embodiment, an airflow channel penetrates the first support member along the first direction, and a first exhaust port penetrates the first insulating member along the first direction, allowing gas to flow towards the explosion-proof valve along the first direction. This facilitates gas release and pressure relief through the explosion-proof valve in the event of thermal runaway within the battery cell. Since the projection of the explosion-proof valve in the first direction is at least partially located within the projection range of the airflow channel's outline in the first direction, the gas pressure can directly act on the explosion-proof valve along the first direction when the gas flows through the airflow channel, facilitating timely gas release and pressure relief through the explosion-proof valve.

[0024] In one embodiment, the projection of the first support member in the first direction falls onto the middle of the explosion-proof valve.

[0025] In this embodiment, the first support member provides support in the middle region of the explosion-proof valve. When the battery cell experiences thermal runaway, it can effectively resist the expansion and deformation of the cell assembly toward the explosion-proof valve, thereby significantly reducing the risk of the cell assembly clogging the explosion-proof valve.

[0026] In one embodiment, the first insulating member is provided with a plurality of exhaust channels extending along a first direction, and the plurality of exhaust channels are distributed on both sides of the first supporting member;

[0027] The projection of the exhaust channel's outline onto the explosion-proof valve in the first direction.

[0028] When a battery cell experiences thermal runaway, the gas can flow through the exhaust channel to the parts of the explosion-proof valve located on both sides of the first support member, thereby allowing more gas to flow to the explosion-proof valve and facilitating rapid exhaust and pressure relief.

[0029] In one embodiment, the battery cell further includes a second support member, which is supported between the inner wall of the outer casing and the first insulating member;

[0030] Second support members are provided on both sides of the first support member at intervals.

[0031] The second support is positioned between the inner wall of the outer casing and the first insulating component. Second supports are spaced apart on both sides of the first support. When thermal runaway occurs within a single battery cell, the second supports on both sides of the first support can further resist the expansion and deformation of the cell assembly in the first direction, thereby further reducing the risk of the cell assembly clogging the explosion-proof valve.

[0032] In one embodiment, the second support member is made of the same material as the outer shell, and the second support member and the outer shell are an integral structure.

[0033] The outer casing is typically made of a high-strength material. The second support component, made of the same material as the outer casing, provides better support and effectively reduces the risk of blockage in the explosion-proof valve. The second support component is integrally molded with the outer casing, facilitating processing.

[0034] In one embodiment, the first support member is made of the same material as the outer casing.

[0035] The outer shell is usually made of a high-strength material. By using the same material as the cover, the first support can provide better support, thereby more effectively reducing the risk of blockage of the explosion-proof valve.

[0036] In one embodiment, the outer casing includes a housing and a cover, one end of the housing has an opening, and the cover is connected to the housing and closes the opening;

[0037] An explosion-proof valve is installed on the cover, a first insulating component is located between the cover and the battery cell assembly, and a first supporting component is supported between the cover and the first insulating component.

[0038] In this embodiment, the explosion-proof valve is placed on the cover, the first insulating member is located between the cover and the battery cell assembly, and the first supporting member is supported between the cover and the first insulating member, which facilitates assembly.

[0039] Secondly, this application provides a battery device, including a battery box and any of the battery cells in the above embodiments, wherein the battery cells are located inside the battery box.

[0040] In the aforementioned battery device, the battery cell is supported by a first support member between the inner wall of the outer casing and the first insulating member. Therefore, the first insulating member provides insulation between the first support member and the battery cell assembly. Furthermore, the first support member provides support between the inner wall of the outer casing and the battery cell assembly. Since the projections of the first support member and the explosion-proof valve in the first direction overlap, a portion of the structure of the first support member is located between the explosion-proof valve and the battery cell assembly along the first direction. Because the first support member has an airflow channel that allows airflow to the explosion-proof valve, and the first insulating member has a first vent hole communicating with the airflow channel, when thermal runaway occurs inside the battery cell, gas can flow into the airflow channel through the first vent hole, and then flow to the explosion-proof valve, allowing for venting and pressure relief of the battery cell through the explosion-proof valve. The portion of the structure of the first support member located between the explosion-proof valve and the battery cell assembly effectively resists the expansion and deformation of the battery cell assembly towards the explosion-proof valve, thereby reducing the risk of the battery cell assembly clogging the explosion-proof valve and reducing the risk of the battery cell exploding.

[0041] Thirdly, this application provides an electrical device, including the battery device in the above embodiments, which is used to provide electrical energy to the electrical device.

[0042] In the aforementioned electrical equipment, since the first support member is supported between the inner wall of the outer casing and the first insulating member, the first insulating member can achieve insulation between the first support member and the battery cell assembly; moreover, the first support member can provide support between the inner wall of the outer casing and the battery cell assembly. Because the projections of the first support member and the explosion-proof valve in the first direction overlap, a portion of the structure of the first support member is located between the explosion-proof valve and the battery cell assembly along the first direction. Since the first support member is constructed with an airflow channel allowing airflow to the explosion-proof valve, and the first insulating member is constructed with a first vent hole communicating with the airflow channel, when thermal runaway occurs inside the battery cell, gas can flow into the airflow channel through the first vent hole, and then flow to the explosion-proof valve through the airflow channel to release pressure from the battery cell. The portion of the structure of the first support member located between the explosion-proof valve and the battery cell assembly can effectively resist the expansion and deformation of the battery cell assembly towards the explosion-proof valve, thereby reducing the risk of the battery cell assembly clogging the explosion-proof valve and reducing the risk of the battery cell exploding.

[0043] 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

[0044] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments 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:

[0045] Figure 1 This is a schematic diagram of the structure of a vehicle according to some embodiments of this application.

[0046] Figure 2 This is an exploded structural diagram of a battery according to some embodiments of this application.

[0047] Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application.

[0048] Figure 4 This is a side view of a battery cell according to some embodiments of this application.

[0049] Figure 5 for Figure 4 A schematic diagram of the CC cross-section.

[0050] Figure 6 for Figure 5 A magnified view of a portion of region A in the middle.

[0051] Figure 7This is an exploded view of the structure of a battery cell according to some embodiments of this application.

[0052] Figure 8 for Figure 7 A partially enlarged schematic diagram of the connection between the first support member and the cover.

[0053] Figure 9 for Figure 7 A partially enlarged schematic diagram of the connection between the first protrusion and the insulating body.

[0054] Figure 10 for Figure 5 A magnified view of a portion of region B in the middle.

[0055] The reference numerals in the detailed embodiments are as follows:

[0056] 1. Vehicle; 10. Battery unit; 20. Controller; 30. Motor;

[0057] 100. Battery box; 110. Box body; 120. Top cover;

[0058] 200. Battery cell; 210. Outer casing; 211. Housing; 212. Cover; 2121. Pressure relief hole; 2122. Terminal mounting hole; 220. Cell assembly; 230. Explosion-proof valve; 240. First insulating component; 2401. First vent; 2402. Vent channel; 241. Insulating body; 242. First protrusion; 243. Second protrusion; 250. First support component; 250a. First end; 250b. Second end; 251. Airflow channel; 2511. Cavity; 2512. Second vent; 260. Second support component; 270. Terminal; 271. Adapter piece; 272. Insulating sealing ring; 273. Rivet; 274. Second insulating component. Detailed Implementation

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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).

[0065] 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.

[0066] 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.

[0067] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied 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 battery device applications, market demand is also constantly increasing.

[0068] A battery assembly typically includes a battery case and individual battery cells. Each battery cell comprises a casing, a cover, and cell assemblies. The casing and cover work together to form the internal environment of the battery cell, where the cell assemblies, electrolyte, and other functional components are located. Generally, the cover is equipped with an explosion-proof valve. When a battery cell experiences thermal runaway, the temperature and pressure of the internal gas increase, and the explosion-proof valve releases pressure to prevent an explosion. However, in related technologies, when a battery cell experiences thermal runaway, the cell assemblies expand and deform, which can easily cause the cell assemblies to clog the explosion-proof valve, leading to an explosion.

[0069] Based on the above considerations, in order to address the problem in related technologies where the battery cell assembly expands and deforms during thermal runaway, easily causing blockage of the explosion-proof valve and leading to an explosion, this application designs a battery cell in which, when thermal runaway occurs inside the battery cell, gas can flow into the airflow channel through the first vent hole on the first insulating member, and then flow to the explosion-proof valve to release pressure and vent gas from the battery cell. A portion of the structure of the first support member located between the explosion-proof valve and the battery cell assembly can effectively resist the expansion and deformation of the battery cell assembly in the direction of the explosion-proof valve, thereby reducing the risk of the battery cell assembly blocking the explosion-proof valve and thus reducing the risk of battery cell explosion.

[0070] The battery device disclosed in this application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. Specifically, the electrical equipment can be, but is not limited to, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as electric car toys, electric ship toys, and electric airplane toys, etc., while spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. By using the battery device disclosed in this application to form the power system of the electrical equipment, the weight of the battery device can be reduced.

[0071] For ease of explanation, the following embodiments will use a vehicle 1 as an example of an electrical device from some embodiments of this application.

[0072] Please refer to Figure 1 , Figure 1The diagram illustrates the structure of a vehicle 1 according to some embodiments of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 10 is installed inside vehicle 1, and the battery device 10 can be located at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1; for example, the battery device 10 can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 20 and a motor 30. The controller 20 controls the battery device 10 to supply power to the motor 30, for example, to meet the power needs of vehicle 1 during starting, navigation, and driving.

[0073] In some embodiments of this application, the battery device 10 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0074] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery provided in some embodiments of this application. The battery device 10 includes a battery case 100 and battery cells 200. The battery cells 200 are housed within the battery case 100. The battery case 100 provides a space for the battery cells 200, and the battery case can have various structures. In some embodiments, the battery case 100 may include a top cover 120 and a body 110, with the top cover 120 and body 110 overlapping each other, together defining a cavity for accommodating the battery cells 200. The body 110 may be a hollow structure with one open end, and the top cover 120 may be a plate-like structure, fitting over the open side of the body 110 so that the top cover 120 and body 110 together define the cavity; alternatively, both the top cover 120 and body 110 may be hollow structures with one open side, with the open side of the top cover 120 fitting over the open side of the body 110. Of course, the battery box 100 formed by the top cover 120 and the box body 110 can be of various shapes, such as cylinder, cuboid, etc.

[0075] In the battery device 10, there can be multiple battery cells 200, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 200 are connected in both series and parallel connections. Multiple battery cells 200 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 200 is housed within the battery box 100. Alternatively, the battery device 10 can also consist of multiple battery cells 200 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the battery box 100. The battery device may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 200.

[0076] Each battery cell 200 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 200 can be cylindrical, flat, cuboid, or other shapes.

[0077] Please see Figure 3 , Figure 3 It shows Figure 2 The image shows an exploded view of a single battery cell 200. The single battery cell 200 refers to the smallest unit that makes up the battery assembly 10. Figure 3 The battery cell 200 includes a housing 211, a cover 212, a cell assembly 220, and other functional components.

[0078] The cover 212 refers to a component that covers the opening of the housing 211 to isolate the internal environment of the battery cell 200 from the external environment. The shape of the cover 212 can be adapted to the shape of the housing 211 to fit it. Optionally, the cover 212 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the cover 212 is less prone to deformation under pressure and impact, giving the battery cell 200 higher structural strength and improving safety performance. Functional components such as terminals 270 can be provided on the cover 212. The terminals 270 can be used for electrical connection with the cell assembly 220 to output or input electrical energy to the battery cell 200. The material of the cover 212 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment does not impose any special limitations on this. In some embodiments, the cover 212 may also be provided with a pressure relief mechanism, such as an explosion-proof valve, for releasing internal pressure when the internal pressure or temperature of the battery cell 200 reaches a threshold.

[0079] The housing 211 is a component used to cooperate with the cover 212 to form the internal environment of the battery cell 200, wherein the formed internal environment can accommodate the cell assembly 220, electrolyte, and other components. The housing 211 and the cover 212 can be independent components. An opening can be provided on the housing 211, and the cover 212 closes the opening to form the internal environment of the battery cell 200. Alternatively, the cover 212 and the housing 211 can be integrated. Specifically, the cover 212 and the housing 211 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 211, the cover 212 closes the housing 211. The housing 211 can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 211 can be determined according to the specific shape and size of the cell assembly 220. The shell 211 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special restrictions on this.

[0080] The cell assembly 220 is the component in the battery cell 200 where the electrochemical reaction occurs. The casing 211 may contain one or more cell assemblies 220. The cell assembly 220 is mainly formed by stacking composite strips 400, which are formed by thermally bonding a positive electrode sheet, a negative electrode sheet, and a separator disposed between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the cell assembly 220, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 10, the positive and negative active materials react with the electrolyte, and the tabs connect to the terminals to form a current circuit.

[0081] Figure 4 A side view of a battery cell according to some embodiments of this application is shown. Figure 5 It shows Figure 4 A schematic diagram of the CC cross-section. Figure 6 It shows Figure 5 A magnified view of a portion of region A in the middle. Figure 7 An exploded view of the structure of a battery cell according to some embodiments of this application is shown.

[0082] Please combine Figures 4 to 6 This application provides a battery cell 200 comprising a housing 210, a cell assembly 220, an explosion-proof valve 230, a first insulating member 240, and a first support member 250. The cell assembly 220 is located inside the housing 210. The explosion-proof valve 230 is mounted on the housing 210. The first insulating member 240 is located between the inner wall of the housing 210 and the cell assembly 220.

[0083] The first support member 250 is supported between the inner wall of the outer casing 210 and the first insulating member 240. The projections of the first support member 250 and the explosion-proof valve 230 in the first direction OZ overlap, where the first direction OZ is the direction from the battery cell assembly 220 to the explosion-proof valve 230. The first support member 250 is configured with an airflow channel 251 that allows airflow to the explosion-proof valve 230, and the first insulating member 240 is configured with a first exhaust port 2401 that communicates with the airflow channel 251.

[0084] Specifically, such as Figure 7 As shown, the housing 210 is provided with a pressure relief hole 2121, and the explosion-proof valve 230 is installed at the pressure relief hole 2121. The first insulating member 240 is used to achieve insulation between the housing 210 and the cell assembly 220.

[0085] Since the first support member 250 is supported between the inner wall of the outer casing 210 and the first insulator 240, the first insulator 240 can simultaneously achieve insulation between the first support member 250 and the cell assembly 220. Moreover, the first support member 250 can provide support between the inner wall of the outer casing 210 and the cell assembly 220.

[0086] Since the projections of the first support member 250 and the explosion-proof valve 230 on the first direction OZ overlap, a portion of the structure of the first support member 250 is located between the explosion-proof valve 230 and the battery cell assembly 220 along the first direction OZ.

[0087] Since the first support member 250 is constructed with an airflow channel 251 that allows airflow to flow to the explosion-proof valve 230, and the first insulating member 240 is constructed with a first exhaust port 2401 that communicates with the airflow channel 251, when thermal runaway occurs inside the battery cell 200, gas can flow into the airflow channel 251 through the first exhaust port 2401, and then flow to the explosion-proof valve 230 through the airflow channel 251, so as to exhaust and relieve pressure through the explosion-proof valve 230.

[0088] The aforementioned battery cell 200, because the first support member 250 is supported between the inner wall of the outer casing 210 and the first insulating member 240, the first insulating member 240 can achieve insulation between the first support member 250 and the cell assembly 220; moreover, the first support member 250 can provide support between the inner wall of the outer casing 210 and the cell assembly 220. Since the projections of the first support member 250 and the explosion-proof valve 230 in the first direction OZ overlap, a portion of the structure of the first support member 250 is located between the explosion-proof valve 230 and the cell assembly 220 along the first direction OZ. Because the first support member 250 is constructed with an airflow channel 251 that allows airflow to flow to the explosion-proof valve 230, and the first insulating member 240 is constructed with a first vent 2401 communicating with the airflow channel 251, when thermal runaway occurs inside the battery cell 200, gas can flow into the airflow channel 251 through the first vent 2401, and then flow to the explosion-proof valve 230 through the airflow channel 251, so as to vent and relieve pressure on the battery cell 200 through the explosion-proof valve 230. The partial structure of the first support member 250 located between the explosion-proof valve 230 and the cell assembly 220 can effectively resist the expansion and deformation of the cell assembly 220 towards the explosion-proof valve 230, thereby reducing the risk of the cell assembly 220 blocking the explosion-proof valve 230 and reducing the risk of the battery cell 200 exploding.

[0089] Please combine Figure 3 and Figure 7In one embodiment, the outer casing 210 includes a housing 211 and a cover 212. One end of the housing 211 has an opening, and the cover 212 is connected to the housing 211 and covers the opening. An explosion-proof valve 230 is mounted on the cover 212, and a first insulating member 240 is located between the cover 212 and the battery cell assembly 220. A first support member 250 is supported between the cover 212 and the first insulating member 240.

[0090] Specifically, the opening allows the battery cell assembly 220 to be inserted into the housing 211. The cover 212 is connected to the housing 211 and closes to the opening, thereby enclosing the battery cell assembly 220 within the housing 210. A pressure relief vent 2121 is provided on the cover 212, and an explosion-proof valve 230 is installed within the pressure relief vent 2121 on the cover 212. A first insulating member 240 provides insulation between the cover 212 and the battery cell assembly 220. A first support member 250 provides support between the cover 212 and the battery cell assembly 220.

[0091] In this embodiment, the explosion-proof valve 230 is placed on the cover 212, the first insulating member 240 is located between the cover 212 and the battery cell assembly 220, and the first supporting member 250 is supported between the cover 212 and the first insulating member 240, which facilitates assembly.

[0092] In other embodiments, the explosion-proof valve may not be installed on the cover. For example, if the explosion-proof valve is installed on the housing, the first insulating member is located between the inner wall of the housing and the battery cell assembly, and the first supporting member is supported between the inner wall of the housing and the first insulating member.

[0093] Figure 8 It shows Figure 7 A partially enlarged schematic diagram of the connection between the first support member and the cover. Please refer to... Figures 6 to 8 In one embodiment, the first support member 250 has a first end 250a facing a first direction OZ and a second end 250b opposite to the first end 250a. The first end 250a is connected to the inner wall of the housing 210, and the second end 250b abuts against the cell assembly 220 through a first insulator 240.

[0094] Understandably, the first end 250a is the end of the first support member 250 facing outward from the housing 211 (i.e., away from the cell assembly 220), and the second end 250b is the end of the first support member 250 facing inward from the housing 211 (i.e., towards the cell assembly 220).

[0095] The first end 250a of the first support member 250 can be connected to the inner wall of the outer casing 210 by welding or by fixing with bolts or other fasteners. The second end 250b of the first support member 250 can abut against the first insulating member 240, which in turn abuts against the cell assembly 220, thereby achieving the connection between the first support member 250 and the cell assembly 220 via the first insulating member 240. The first insulating member 240 and the second end 250b can also be connected by adhesive or other methods.

[0096] Specifically, when the outer casing 210 includes a housing 211 and a cover 212, the first end 250a of the first support member 250 may be connected to the inner wall of the cover 212.

[0097] In this embodiment, the first end 250a is connected to the inner wall of the outer shell 210, and the second end 250b abuts against the cell assembly 220 through the first insulating member 240, so that the first support member 250 is stably supported between the outer shell 210 and the cell assembly 220.

[0098] In other embodiments, the first end of the first support member may also abut against the inner wall of the housing.

[0099] Figure 9 It shows Figure 7 A partially enlarged schematic diagram of the connection between the first protrusion and the insulating body. Please refer to... Figure 6 , Figure 7 and Figure 9 As shown, in one embodiment, the first insulating member 240 includes an insulating body 241 and a first protrusion 242. One end of the first protrusion 242 is connected to the insulating body 241, and the first protrusion 242 protrudes relative to the insulating body 241 towards the cell assembly 220. The insulating body 241 is fitted against the inner wall of the outer casing 210 (specifically, it may be fitted against the cover 212). The first protrusion 242 is fitted against the first support member 250; therefore, the shape of the first protrusion 242 matches the shape of the first support member 250. The first support member 250 abuts against the cell assembly 220 through the first protrusion 242.

[0100] Please refer to Figure 6 In one embodiment, the airflow channel 251 extends through the first support member 250 along the first direction OZ, and the first exhaust port 2401 extends through the first insulating member 240 along the first direction OZ. The projection of the explosion-proof valve 230 in the first direction OZ is at least partially located within the projection range of the outline of the airflow channel 251 in the first direction OZ.

[0101] Specifically, the airflow channel 251 can be a through hole extending through the first support member 250 along the first direction OZ, and the first exhaust port 2401 can be a through hole extending through the first insulating member 240 along the first direction OZ. In this way, gas can flow sequentially along the first direction OZ through the first exhaust port 2401 and the airflow channel 251 to the explosion-proof valve 230.

[0102] exist Figure 6 In the illustrated embodiment, the projection of the explosion-proof valve 230 in the first direction OZ is located within the projection range of the outline of the airflow channel 251 in the first direction OZ. In other alternative embodiments, when the outline range of the airflow channel 251 is large, the projection of the explosion-proof valve 230 in the first direction OZ can also be entirely located within the projection range of the outline of the airflow channel 251 in the first direction OZ.

[0103] In this embodiment, the airflow channel 251 passes through the first support member 250 along the first direction OZ, and the first exhaust port 2401 passes through the first insulating member 240 along the first direction OZ. This allows gas to flow along the first direction OZ to the explosion-proof valve 230, facilitating gas release and pressure relief when the battery cell 200 experiences internal thermal runaway. Since the projection of the explosion-proof valve 230 in the first direction OZ is at least partially within the projection range of the outline of the airflow channel 251 in the first direction OZ, the gas pressure can directly act on the explosion-proof valve 230 along the first direction OZ when the gas flows through the airflow channel 251 to the explosion-proof valve 230, facilitating timely gas release and pressure relief through the explosion-proof valve 230.

[0104] In other embodiments, the airflow channel may extend in a direction inclined to the first direction, or it may extend in a series of tortuous directions.

[0105] Please combine Figures 6 to 8 In one embodiment, the airflow channel 251 includes a recess 2511 and a second exhaust port 2512 disposed on the bottom wall of the recess 2511. The recess 2511 is recessed inward from one end of the first support member 250 toward the first direction OZ, and the recess 2511 communicates with the first exhaust port 2401 via the second exhaust port 2512.

[0106] Specifically, the shape and position of the first exhaust port 2401 correspond to the second exhaust port 2512, thereby facilitating the flow of gas from the first exhaust port 2401 into the second exhaust port 2512.

[0107] When thermal runaway occurs in the battery cell 200, the gas can flow from the first vent 2401 to the second vent 2512, and then flow into the cavity 2511 through the second vent 2512. When the gas pressure in the cavity 2511 reaches the pressure limit of the explosion-proof valve 230, it can break through the explosion-proof valve 230, thereby allowing the battery cell 200 to release gas pressure.

[0108] In this embodiment, the projection of the outline of the airflow channel 251 toward the first direction OZ is the projection of the outline of the cavity 2511 toward the first direction OZ. The projection portion of the explosion-proof valve 230 in the first direction OZ is located within the projection range of the outline of the cavity 2511 in the first direction OZ.

[0109] In this embodiment, the airflow channel 251 includes a cavity 2511 and a second exhaust hole 2512 disposed on the bottom wall of the cavity 2511, which allows gas to enter through the second exhaust hole 2512 and collect in the cavity 2511, facilitating the exhaust of gas through the cavity 2511.

[0110] In other embodiments, the airflow channel 251 may not include the cavity 2511. For example, the airflow channel 251 may be a second exhaust port 2512 that penetrates the first support member 250.

[0111] In other embodiments, when the cavity 2511 is large, the projection of the explosion-proof valve 230 in the first direction OZ can also be entirely within the projection range of the contour of the cavity 2511 in the first direction OZ.

[0112] Please combine Figures 7 to 9 In one embodiment, there are multiple second exhaust holes 2512, and the multiple second exhaust holes 2512 are spaced apart from each other.

[0113] Specifically, the first insulating member 240 has multiple first vent holes 2401. Each of the multiple first vent holes 2401 is connected to a multiple of the second vent holes 2512 in a one-to-one correspondence. Of course, it is also possible that one first vent hole 2401 corresponds to multiple second vent holes 2512, or one second vent hole 2512 corresponds to multiple first vent holes 2401.

[0114] When thermal runaway occurs in a single battery cell 200, multiple second vent holes 2512 facilitate rapid venting.

[0115] Please combine Figures 6 to 8 In one embodiment, the projection of the first support member 250 in the first direction OZ falls on the middle of the explosion-proof valve 230.

[0116] Understandably, since the projection of the first support member 250 in the first direction OZ falls on the middle of the explosion-proof valve 230, that is, the support area of ​​the first support member 250 is also located between the middle area of ​​the explosion-proof valve 230 and the cell assembly 220. Specifically, in this embodiment, the middle of the explosion-proof valve 230 refers to the middle part along the length direction of the explosion-proof valve 230. Figure 7 In the embodiment shown, the middle part of the explosion-proof valve 230 is the middle part of the explosion-proof valve 230 along the length direction of the cover 212.

[0117] In this embodiment, the first support member 250 provides support in the middle region of the explosion-proof valve 230. When the battery cell 200 experiences thermal runaway, it can effectively resist the expansion and deformation of the cell assembly 220 toward the explosion-proof valve 230, thereby significantly reducing the risk of the cell assembly 220 clogging the explosion-proof valve 230.

[0118] Please combine Figures 7 to 9 In one embodiment, the first insulating member 240 is provided with a plurality of exhaust channels 2402 extending along the first direction OZ, and the plurality of exhaust channels 2402 are distributed on both sides of the first support member 250. The projection of the outline of the exhaust channel 2402 in the first direction OZ falls on the explosion-proof valve 230.

[0119] Specifically, since the projection of the first support member 250 in the first direction OZ falls on the middle of the explosion-proof valve 230, the two sides of the explosion-proof valve 230 are not directly supported or blocked by the first support member 250. In this embodiment, exhaust grooves 2402 are formed on the portions of the first insulating member 240 located on both sides of the first support member 250, and the positions of the exhaust grooves 2402 correspond to the positions of the portions of the explosion-proof valve 230 located on both sides of the first support member 250.

[0120] When the battery cell 200 experiences thermal runaway, the gas can flow through the exhaust channel 2402 to the portion of the explosion-proof valve 230 located on both sides of the first support member 250, thereby facilitating the flow of more gas to the explosion-proof valve 230 and enabling rapid exhaust and pressure relief.

[0121] Figure 10 It shows Figure 5 A magnified view of a portion of region B in the middle. Please refer to... Figure 7 , Figure 9 and Figure 10 In one embodiment, the battery cell 200 further includes a second support member 260, which is supported between the inner wall of the outer casing 210 and the first insulating member 240. The second support members 260 are respectively provided on both sides of the first support member 250 at intervals.

[0122] Specifically, since the second support member 260 is located between the inner wall of the housing 210 and the first insulating member 240, the first insulating member 240 can also provide insulation between the second support member 260 and the cell assembly 220. Simultaneously, the second support member 260 forms a support between the inner wall of the housing 210 and the cell assembly 220. The second support member 260 and the first support member 250 are located on the same side of the cell assembly 220, i.e., the OZ side in the first direction.

[0123] The end of the second support member 260 facing away from the cell assembly 220 can be welded to the inner wall of the outer casing 210, fixedly connected by bolts or other connectors, or abutted against. The end of the second support member 260 facing the cell assembly 220 can abut against the first insulating member 240, which in turn abuts against the cell assembly 220, thus achieving abutment between the second support member 260 and the cell assembly 220 via the first insulating member 240. The first insulating member 240 and the second support member 260 can also be connected by adhesive or other methods.

[0124] The second support member 260 is supported between the inner wall of the outer casing 210 and the first insulating member 240. The second support members 260 are spaced apart on both sides of the first support member 250. When thermal runaway occurs within the battery cell 200, the second support members 260 on both sides of the first support member 250 can further resist the expansion and deformation of the cell assembly 220 in the first direction OZ, thereby further reducing the risk of the cell assembly 220 clogging the explosion-proof valve 230.

[0125] In one embodiment, when the outer casing 210 includes a housing 211 and a cover 212, the second support member 260 may be connected to or abut against the inner wall of the cover 212. The second support members 260 on both sides of the first support member 250 are respectively located at both ends of the extending direction of the cover 212.

[0126] As shown in Figure 7, in one embodiment, a second support member 260 is provided at each end of the extension direction of the cover 212.

[0127] In other embodiments, two or more second supports 260 may be provided at either end of the extension direction of the cover 212.

[0128] In one embodiment, such as Figure 7 and Figure 10 As shown, the first insulating member 240 also includes a second protrusion 243. One end of the second protrusion 243 is connected to the insulating body 241, and the second protrusion 243 protrudes relative to the insulating body 241 towards the cell assembly 220. The second protrusion 243 fits into the second support member 260; therefore, the shape of the second protrusion 243 matches the shape of the second support member 260. The second support member 260 abuts against the cell assembly 220 through the second protrusion 243.

[0129] In one embodiment, the second support member 260 and the outer shell 210 are made of the same material, and the second support member 260 and the outer shell 210 are integrally formed structures.

[0130] The outer casing 210 and the second support member 260 can be made of metal. The outer casing 210 and the second support member 260 can be integrally formed by stamping, thus forming an integrated structure.

[0131] Please combine 7 and Figure 10 The second support member 260, which is formed by stamping, is recessed inward from the end facing the first direction OZ to form a hollow structure.

[0132] The outer casing 210 is typically made of a high-strength material. The second support member 260 is made of the same material as the outer casing 210, which provides better support and thus more effectively reduces the risk of blockage of the explosion-proof valve 230. The second support member 260 is integrally formed with the outer casing 210, facilitating processing.

[0133] When the outer casing 210 includes the casing 211 and the cover 212, the second support member 260 may be made of the same material as the cover 212, and the second support member 260 and the cover 212 may be an integral structure.

[0134] In other embodiments, the second support member 260 and the outer shell 210 may also be separately formed structures and then connected to each other, for example, by welding. The second support member 260 and the outer shell 210 may also be integrally formed using other processes. The second support member 260 may also be a solid structure.

[0135] In one embodiment, the first support member 250 is made of the same material as the outer casing 210.

[0136] The first support member 250 and the outer shell 210 can be made of metal. The outer shell 210 is usually made of a high-strength material. By using the same material as the first support member 250 and the cover 212, the first support member 250 can have better support, thereby more effectively reducing the risk of blockage of the explosion-proof valve 230.

[0137] When the outer casing 210 includes the casing 211 and the cover 212, the first support member 250 and the cover 212 are made of the same material.

[0138] Please refer to Figure 7 In one embodiment, the outer casing 210 (specifically, the cover 212) is provided with terminal mounting holes 2122. The battery cell 200 also includes terminals 270, which are mounted in the terminal mounting holes 2122. The terminals 270 are electrically connected to the tabs of the cell assembly 220, so that the battery cell 200 can input or output electrical energy through the terminals 270.

[0139] Please refer to Figure 7 In one embodiment, there are two terminals 270, one of which is a positive terminal 270 and the other is a negative terminal. There are two terminal mounting holes 2122, one for mounting the positive terminal 270 and the other for mounting the negative terminal.

[0140] Please refer to Figure 7In one embodiment, the battery cell 200 further includes an adapter piece 271, through which the terminal post 270 is electrically connected to the tab of the cell assembly 220.

[0141] There are two adapter pieces 271, and each adapter piece 271 corresponds to one of the two pole pieces 270. The pole piece 270 is connected to the corresponding pole tab through the corresponding adapter piece 271.

[0142] Please refer to Figure 7 In one embodiment, the battery cell 200 further includes an insulating sealing ring 272, which is disposed between the terminal post 270 and the outer casing 210.

[0143] Specifically, the insulating sealing ring 272 may be disposed between the pole post 270 and the cover 212 of the outer casing 210.

[0144] The insulating sealing ring 272 can achieve insulation between the terminal 270 and the outer casing 210 on the one hand, and seal the gap between the terminal 270 and the outer casing 210 on the other hand, thereby reducing the risk of electrolyte leakage in the battery cell 200.

[0145] Please refer to Figure 7 In one embodiment, the battery cell 200 further includes a riveting member 273 and a second insulating member 274. The riveting member 273 is connected to the terminal post 270 and is used to rivet the terminal post 270 to the terminal post mounting hole 2122. The second insulating member 274 fills the space between the riveting member 273 and the outer casing 210 (which may be a cover 212).

[0146] The second insulating component 274 can, on the one hand, achieve insulation between the riveting component 273 and the outer casing 210, and on the other hand, seal the gap between the riveting component 273 and the outer casing 210, thereby reducing the risk of electrolyte leakage inside the battery cell 200.

[0147] This application provides a battery cell 200 including a housing 210, a cell assembly 220, an explosion-proof valve 230, a first insulating member 240, and a first support member 250. The cell assembly 220 is located inside the housing 210. The housing 210 includes a shell 211 and a cover 212. One end of the shell 211 has an opening, and the cover 212 is connected to the shell 211 and covers the opening. The explosion-proof valve 230 is mounted on the cover 212, and the first insulating member 240 is located between the cover 212 and the cell assembly 220. The first support member 250 is supported between the cover 212 and the first insulating member 240. The projections of the first support member 250 and the explosion-proof valve 230 in the first direction OZ overlap. The first support member 250 is configured with an airflow channel 251 that allows airflow to flow to the explosion-proof valve 230, and the first insulating member 240 is configured with a first exhaust port 2401 communicating with the airflow channel 251. The first support member 250 has a first end 250a facing a first direction OZ and a second end 250b opposite to the first end 250a. The first end 250a is connected to the cover 212, and the second end 250b abuts against the cell assembly 220 through the first insulator 240. An airflow channel 251 passes through the first support member 250 along the first direction OZ, and a first exhaust port 2401 passes through the first insulator 240 along the first direction OZ. The battery cell 200 also includes a second support member 260, which is supported between the inner wall of the outer casing 210 and the first insulator 240. The second support members 260 are respectively provided on both sides of the first support member 250 at intervals.

[0148] The aforementioned battery cell 200, because the first support member 250 is supported between the inner wall of the outer casing 210 and the first insulating member 240, the first insulating member 240 can achieve insulation between the first support member 250 and the cell assembly 220; moreover, the first support member 250 can provide support between the inner wall of the outer casing 210 and the cell assembly 220. Since the projections of the first support member 250 and the explosion-proof valve 230 in the first direction OZ overlap, a portion of the structure of the first support member 250 is located between the explosion-proof valve 230 and the cell assembly 220 along the first direction OZ. Because the first support member 250 is constructed with an airflow channel 251 that allows airflow to flow to the explosion-proof valve 230, and the first insulating member 240 is constructed with a first vent 2401 communicating with the airflow channel 251, when thermal runaway occurs inside the battery cell 200, gas can flow into the airflow channel 251 through the first vent 2401, and then flow to the explosion-proof valve 230 through the airflow channel 251, so as to vent and relieve pressure on the battery cell 200 through the explosion-proof valve 230. The partial structure of the first support member 250 located between the explosion-proof valve 230 and the cell assembly 220 can effectively resist the expansion and deformation of the cell assembly 220 towards the explosion-proof valve 230, thereby reducing the risk of the cell assembly 220 blocking the explosion-proof valve 230 and reducing the risk of the battery cell 200 exploding. The first end 250a is connected to the inner wall of the outer casing 210, and the second end 250b abuts against the cell assembly 220 through the first insulating member 240, which allows the first support member 250 to be stably supported between the outer casing 210 and the cell assembly 220. Gas can flow sequentially along the first direction OZ through the first exhaust port 2401 and the airflow channel 251 to the explosion-proof valve 230. Second support members 260 are respectively provided on both sides of the first support member 250 at intervals. When thermal runaway occurs in the battery cell 200, the second support members 260 on both sides of the first support member 250 can further resist the expansion and deformation of the cell assembly 220 in the first direction OZ, thereby further reducing the risk of the cell assembly 220 clogging the explosion-proof valve 230.

[0149] An embodiment of this application also provides a battery device 10, including a battery case 100 and any of the battery cells 200 in the above embodiments, wherein the battery cells 200 are located inside the battery case 100.

[0150] In the aforementioned battery device 10, the battery cell 200 is supported by the first support member 250 between the inner wall of the outer casing 210 and the first insulating member 240. Therefore, the first insulating member 240 can achieve insulation between the first support member 250 and the cell assembly 220; moreover, the first support member 250 can provide support between the inner wall of the outer casing 210 and the cell assembly 220. Since the projections of the first support member 250 and the explosion-proof valve 230 in the first direction OZ overlap, a portion of the structure of the first support member 250 is located between the explosion-proof valve 230 and the cell assembly 220 along the first direction OZ. Because the first support member 250 is constructed with an airflow channel 251 that allows airflow to flow to the explosion-proof valve 230, and the first insulating member 240 is constructed with a first vent 2401 communicating with the airflow channel 251, when thermal runaway occurs inside the battery cell 200, gas can flow into the airflow channel 251 through the first vent 2401, and then flow to the explosion-proof valve 230 through the airflow channel 251, so as to vent and relieve pressure on the battery cell 200 through the explosion-proof valve 230. The partial structure of the first support member 250 located between the explosion-proof valve 230 and the cell assembly 220 can effectively resist the expansion and deformation of the cell assembly 220 towards the explosion-proof valve 230, thereby reducing the risk of the cell assembly 220 blocking the explosion-proof valve 230 and reducing the risk of the battery cell 200 exploding.

[0151] An embodiment of this application also provides an electrical device, including the battery device 10 described above, which is used to provide electrical energy to the electrical device.

[0152] In the aforementioned electrical equipment, since the first support member 250 is supported between the inner wall of the housing 210 and the first insulating member 240, the first insulating member 240 can achieve insulation between the first support member 250 and the battery cell assembly 220; moreover, the first support member 250 can provide support between the inner wall of the housing 210 and the battery cell assembly 220. Since the projections of the first support member 250 and the explosion-proof valve 230 in the first direction OZ overlap, a portion of the structure of the first support member 250 is located between the explosion-proof valve 230 and the battery cell assembly 220 along the first direction OZ. Because the first support member 250 is constructed with an airflow channel 251 that allows airflow to flow to the explosion-proof valve 230, and the first insulating member 240 is constructed with a first vent 2401 communicating with the airflow channel 251, when thermal runaway occurs inside the battery cell 200, gas can flow into the airflow channel 251 through the first vent 2401, and then flow to the explosion-proof valve 230 through the airflow channel 251, so as to vent and relieve pressure on the battery cell 200 through the explosion-proof valve 230. The partial structure of the first support member 250 located between the explosion-proof valve 230 and the cell assembly 220 can effectively resist the expansion and deformation of the cell assembly 220 towards the explosion-proof valve 230, thereby reducing the risk of the cell assembly 220 blocking the explosion-proof valve 230 and reducing the risk of the battery cell 200 exploding.

[0153] 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 cell (200) characterized by, The battery cell (200) comprises: a housing (210); an electric core assembly (220) located in the housing (210); an explosion-proof valve (230) installed on the housing (210); a first insulation piece (240) located between the inner wall of the housing (210) and the electric core assembly (220); a first support piece (250) supported between the inner wall of the housing (210) and the first insulation piece (240), the projection of the first support piece (250) and the explosion-proof valve (230) in a first direction (OZ) has an overlap, the first direction (OZ) is the direction of the electric core assembly (220) pointing to the explosion-proof valve (230); wherein the first support piece (250) is configured with an air flow channel (251) allowing air flow to flow to the explosion-proof valve (230), and the first insulation piece (240) is configured with a first exhaust hole (2401) in communication with the air flow channel (251).

2. The battery cell (200) according to claim 1, characterized in that The first support piece (250) has a first end (250a) facing the first direction (OZ) and a second end (250b) opposite to the first end (250a); the first end (250a) is connected with the inner wall of the housing (210), and the second end (250b) is in abutment with the electric core assembly (220) through the first insulation piece (240).

3. The battery cell (200) of claim 1, wherein, The air flow channel (251) comprises a recess (2511) and a second exhaust hole (2512) provided at the bottom wall of the recess (2511); the recess (2511) is recessed inward from one end of the first support piece (250) facing the first direction (OZ), and the recess (2511) is in communication with the first exhaust hole (2401) through the second exhaust hole (2512).

4. The battery cell (200) of claim 3, wherein, The number of the second exhaust holes (2512) is multiple, and multiple second exhaust holes (2512) are arranged at intervals.

5. The battery cell (200) according to claim 1, wherein the air flow channel (251) penetrates through the first support piece (250) along the first direction (OZ), and the first exhaust hole (2401) penetrates through the first insulation piece (240) along the first direction (OZ); the projection of the explosion-proof valve (230) in the first direction (OZ) is at least partially located within the projection range of the contour of the air flow channel (251) in the first direction (OZ).

6. The battery cell (200) of claim 1, wherein, The projection of the first support piece (250) in the first direction (OZ) falls on the middle part of the explosion-proof valve (230).

7. The battery cell (200) of claim 6, wherein, The first insulation piece (240) is provided with multiple exhaust grooves (2402) penetrating along the first direction (OZ), and multiple exhaust grooves (2402) are distributed on both sides of the first support piece (250); the projection of the contour of the exhaust groove (2402) in the first direction (OZ) falls on the explosion-proof valve (230).

8. The battery cell (200) of claim 1, wherein, The battery cell (200) further comprises a second support (260) supported between an inner wall of the shell (210) and the first insulation (240); The first support (250) is provided with the second supports (260) at two sides thereof in a spaced manner.

9. The battery cell (200) of claim 8, wherein, The second support (260) is made of the same material as the shell (210) and is in an integrated structure with the shell (210).

10. The battery cell (200) of claim 1, wherein, The first support (250) is made of the same material as the shell (210).

11. The battery cell (200) according to any one of claims 1-10, characterized in that, The shell (210) comprises a shell body (211) and a cover (212), one end of the shell body (211) is provided with an opening, and the cover (212) is connected with the shell body (211) and covers the opening. The explosion-proof valve (230) is arranged on the cover (212), the first insulation (240) is located between the cover (212) and the cell assembly (220), and the first support (250) is supported between the cover (212) and the first insulation (240).

12. A battery device (10) characterized by comprising: The battery device (10) of claim 12 is used to provide electric energy for the electric device.

13. An electrical device, characterized by The battery device (10) of claim 12 is used to provide electric energy for the electric device.

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