Battery monomer and battery pack

Abstract

The utility model provides a battery monomer and a battery pack, and relates to the technical field of batteries. The battery monomer comprises a shell, an electrode assembly, a cover plate, an insulating part and an insulating bracket, the electrode assembly is arranged in the shell and comprises an electrode body and a tab which are connected with each other; the cover plate is connected with the shell, and a pole and an anti-explosion valve are arranged on the cover plate; the insulating part is arranged in the shell and is connected with one side, facing the electrode assembly, of the cover plate; the insulating support is arranged in the shell and connected with the side, close to the electrode assembly, of the insulating part, the insulating support comprises a first supporting part and a third supporting part which are connected, the first supporting part abuts against the electrode body and is provided with a through first exhaust port, and the first exhaust port and the explosion-proof valve are oppositely arranged; and a part of the tab is positioned between the third supporting piece and the insulating piece and is electrically connected with the pole. According to the battery monomer provided by the invention, the exhaust smoothness of the battery monomer can be ensured.

Description

Technical Field

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

[0002] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.

[0003] With the development of battery technology, the safety requirements for individual battery cells are becoming increasingly stringent. In existing battery cells, the tabs are prone to inserting into the electrode body, which can lead to short circuits. To improve the safety of battery cells, insulating components are added to support the tabs. However, this can cause problems with venting when a battery cell experiences thermal runaway. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a battery cell and a battery pack, which aims to solve the technical problem of poor venting when a battery cell experiences thermal runaway.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide a single battery cell, comprising:

[0007] case;

[0008] An electrode assembly is disposed within the housing, the electrode assembly comprising an electrode body and a tab connected to each other;

[0009] A cover plate is connected to the housing, and the cover plate is provided with an electrode post and an explosion-proof valve;

[0010] An insulating element is disposed within the housing and connected to the side of the cover plate facing the electrode assembly;

[0011] An insulating bracket is disposed within the housing and connected to the insulating member on the side near the electrode assembly. The insulating bracket includes a first support member and a third support member connected to each other. The first support member abuts against the electrode body and has a through first vent. The first vent is disposed opposite to the explosion-proof valve. A portion of the electrode tab is located between the third support member and the insulating member and is electrically connected to the electrode post.

[0012] In one embodiment of the first aspect, the third support member includes a first connecting portion and a rod-shaped support portion connected together, the first connecting portion being located at one end of the rod-shaped support portion and connected to the first support member, and the tab portion being located between the rod-shaped support portion and the insulating member.

[0013] In one embodiment of the first aspect, the battery cell has a first orientation, the insulating member includes a first plastic portion and an insulating body, the insulating body is connected to the side of the cover plate facing the electrode body, the first plastic portion is connected to the side of the insulating body facing the electrode body, the first plastic portion abuts against the electrode body, the first plastic portion is provided with a first limiting groove, the first limiting groove penetrates the first plastic portion along the first orientation, and the first support member is at least partially disposed within the first limiting groove.

[0014] In one embodiment of the first aspect, the first plastic part is provided with a first clearance groove on the side near the electrode assembly, the first clearance groove is connected to the first limiting groove, and the first connecting part is disposed in the first clearance groove.

[0015] In one embodiment of the first aspect, the insulating bracket further includes a second support member connected to one end of the rod-shaped support portion away from the first connecting portion. The second support member abuts against the electrode body. The insulating member further includes a second plastic portion connected to the side of the insulating body facing the electrode body. The second plastic portion is provided with a second limiting groove, which penetrates the second plastic portion along the first direction. The second support member is at least partially disposed within the second limiting groove.

[0016] In one embodiment of the first aspect, the second support member is provided with a second exhaust port, which penetrates the second support member along the first direction.

[0017] In one embodiment of the first aspect, the third support member further includes a second connecting portion, the second connecting portion being located at one end of the rod-shaped support portion away from the first connecting portion, the second support member being connected to the second connecting portion, the second plastic portion being provided with a second clearance groove communicating with the second limiting groove, and the second connecting portion being disposed within the second clearance groove.

[0018] In one embodiment of the first aspect, the battery cell further has a second direction and a third direction that intersect the first direction in pairs. The first exhaust port includes a plurality of first exhaust holes arranged along the second direction and the third direction. The first exhaust holes are disposed through the first support member along the first direction and communicate with the first limiting groove. The second exhaust port includes a plurality of second exhaust holes arranged along the third direction. The second exhaust holes are disposed through the second support member along the first direction and communicate with the second limiting groove.

[0019] In one embodiment of the first aspect, the battery cell further includes a protective layer that covers the rod-shaped support portion to isolate the rod-shaped support portion from the tab.

[0020] Secondly, embodiments of this application provide a battery pack including the battery cells described in any of the embodiments of the first aspect above.

[0021] The beneficial effects of this application are as follows:

[0022] The battery cell provided in this application has an insulating support inside the casing. The insulating support includes a third support member. By positioning the electrode tab between the third support member and the insulating member, the third support member can support the electrode tab, thereby reducing the possibility of the electrode tab inserting into the electrode body, thus reducing the risk of short circuit and improving the safety of the battery cell. At the same time, a first vent is provided on the insulating support to ensure smooth venting of the battery cell.

[0023] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This illustration shows a schematic diagram of the assembly structure of the cover plate assembly and the electrode assembly after core assembly in one embodiment of this application;

[0026] Figure 2 This illustration shows a schematic diagram of the assembly structure of the cover plate assembly and the electrode assembly before core assembly in one embodiment of this application;

[0027] Figure 3 This paper shows a schematic diagram of the structure of a single battery cell in one embodiment of the present application.

[0028] Figure 4 An exploded structural diagram of a battery cell in one embodiment of this application is shown;

[0029] Figure 5 This invention provides a schematic diagram of the structure of a single battery cell from another perspective in one embodiment of the present application.

[0030] Figure 6 It shows Figure 5Schematic diagram of the cross-sectional structure at point AA;

[0031] Figure 7 It shows Figure 6 A magnified structural diagram of region B in the middle;

[0032] Figure 8 This illustration shows another perspective structural diagram of a battery cell in one embodiment of this application;

[0033] Figure 9 It shows Figure 8 A schematic diagram of the cross-sectional structure at the CC section;

[0034] Figure 10 It shows Figure 9 A magnified structural diagram of region D in the middle;

[0035] Figure 11 This paper shows a schematic diagram of the cover plate assembly from one perspective in one embodiment of the present application;

[0036] Figure 12 An exploded view of the cover plate assembly in one embodiment of this application is shown;

[0037] Figure 13 A schematic diagram of the insulating support structure from one perspective is shown in one embodiment of this application.

[0038] Explanation of key component symbols:

[0039] 1000 - Battery cell; 100 - Housing; 110 - Receiving cavity; 200 - Electrode assembly; 210 - Electrode body; 220 - Tab; 300 - Cover assembly; 310 - Cover; 320 - Insulator; 321 - First plastic part; 322 - Second plastic part; 323 - Insulating body; 324 - First limiting groove; 325 - Second limiting groove; 326 - First clearance groove; 327 - Second clearance groove; 330 - Insulating bracket; 331 - First support member; 332 - ... Second support component; 333-Third support component; 3331-First connecting part; 3332-Second connecting part; 3333-Rod-shaped support part; 334-First exhaust port; 3341-First exhaust hole; 335-Exhaust channel; 336-Second exhaust port; 3361-Second exhaust hole; 340-Protective layer; 350-Pole post; 360-Explosion-proof valve; 370-Adapter piece; 380-Insulating film; 390-Base plate; X-Second direction; Y-Third direction; Z-First direction. Detailed Implementation

[0040] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0041] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not 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 this application.

[0042] Furthermore, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this application, the terms "first," "second," etc., are used to distinguish different objects and should not be construed as indicating or implying a specific order or hierarchy, or implicitly specifying the number of technical features indicated. Therefore, a feature marked "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0044] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] In the description of this application, the term "and / or" indicates that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" relationship.

[0046] In the description of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 80° to 90°, the two directions can be considered perpendicular; if the angle between two directions is 0° to 10°, the two directions can be considered parallel.

[0047] With the development of battery technology, the safety requirements for individual battery cells are becoming increasingly stringent. During the manufacturing process of individual battery cells, after the electrode assembly is fused together, the tabs of the electrode assembly can easily insert into the electrode body, causing a short circuit. When a battery cell experiences thermal runaway, the insulating components supporting the electrode assembly melt at high temperatures, and the electrode assembly can easily shift, blocking the explosion-proof valve and resulting in poor venting.

[0048] To address the aforementioned technical problems, firstly, embodiments of this application provide a single battery cell, relating to the field of battery technology, primarily used in battery packs for application in electrical devices or energy storage devices. Of course, the single battery cell can also be directly applied to electrical devices or energy storage devices without using a battery pack; therefore, no specific limitations are placed on the application scenarios of the single battery cell.

[0049] For example, electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be gasoline-powered cars, natural gas-powered cars, and new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, and range-extended electric vehicles; spacecraft can be drones, airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; power tools can be metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers; energy storage devices can be energy storage containers and energy storage power stations. No specific restrictions are placed on the types of electrical devices and energy storage devices here.

[0050] like Figures 1 to 7 As shown, the battery cell 1000 provided in this embodiment includes: a housing 100, an electrode assembly 200, a cover plate 310, an insulating component 320, and an insulating support 330.

[0051] The electrode assembly 200 is disposed within the housing 100, and includes an electrode body 210 and an electrode tab 220 connected to each other; a cover plate 310 is connected to the housing 100, and the cover plate 310 is provided with an electrode post 350 and an explosion-proof valve 360; an insulating component 320 is disposed within the housing 100 and connected to the side of the cover plate 310 facing the electrode assembly 200; an insulating support 330 is disposed within the housing 100 and connected to the side of the insulating component 320 near the electrode assembly 200, and the insulating support... The frame 330 includes a first support member 331 and a third support member 333 connected to each other. The first support member 331 abuts against the electrode body 210 and is provided with a through first exhaust port 334. The first exhaust port 334 is disposed opposite to the explosion-proof valve 360. A portion of the electrode tab 220 is located between the third support member 333 and the insulating member 320. The portion of the electrode tab 220 located between the third support member 333 and the insulating member 320 is the bent portion of the electrode tab 220. The bent portion is electrically connected to the electrode post 350.

[0052] It should be noted that "the tab 220 also includes a folding part, which is connected to the electrode body 210 and is also connected to the bending part."

[0053] For example, tab 220 is a positive tab and post 350 is a positive post; of course, tab 220 can also be a negative tab and post 350 can be a positive post. No specific restrictions are placed on the types of tab 220 and post 350 here.

[0054] It is understood that the battery cell 1000 provided in this embodiment, through the first support member 331 with the first vent 334 abutting against the electrode body 210, can support the electrode assembly 200 after the insulating member 320 melts at high temperature, and vent through the first vent 334, thereby reducing the possibility that the electrode assembly 200 will move and block the explosion-proof valve 360 ​​when the battery cell 1000 thermally runs away, so that the explosion-proof valve 360 ​​can complete the pressure relief normally and ensure smooth venting; by placing the bent part of the tab 220 between the third support member 333 and the insulating member 320, the third support member 333 can assist the bending of the tab 220 and support the bent part of the tab 220, thereby reducing the possibility that the tab 220 will be inserted into the electrode body 210, thus reducing the risk of short circuit.

[0055] like Figure 13 As shown, in one embodiment, the third support member 333 includes a first connecting portion 3331 and a rod-shaped support portion 3333 connected to each other. The first connecting portion 3331 is located at one end of the rod-shaped support portion 3333 and is connected to the first support member 331. The tab 220 is located between the rod-shaped support portion 3333 and the insulating member 320.

[0056] Understandably, by setting the rod-shaped support 3333, it can not only assist the bending of the tab 220 and support the bent part of the tab 220, thereby reducing the possibility of the tab 220 being inserted into the electrode body 210, but also has a smaller mass due to its rod shape, which is conducive to the lightweight design of the insulating support 330, thereby improving the energy density of the battery cell 1000.

[0057] like Figures 8 to 12 As shown, in a specific embodiment, the battery cell 1000 has a first direction Z, the insulating member 320 includes a first plastic part 321 and an insulating body 323, the insulating body 323 is connected to the side of the cover plate 310 facing the electrode body 210, the first plastic part 321 is connected to the side of the insulating body 323 facing the electrode body 210, the first plastic part 321 abuts against the electrode body 210, the first plastic part 321 is provided with a first limiting groove 324, the first limiting groove 324 penetrates the first plastic part 321 along the first direction Z, and the first support member 331 is at least partially disposed in the first limiting groove 324.

[0058] It is understandable that by providing a first limiting groove 324 on the first plastic part 321 and placing at least a portion of the first support member 331 within the first limiting groove 324, the first support member 331 can be limited, thereby increasing the stability of the insulating bracket 330.

[0059] Furthermore, when the battery cell 1000 experiences thermal runaway, if the insulating component 320 does not melt, the high-temperature, high-pressure gas can reach the explosion-proof valve 360 ​​for pressure relief via the first exhaust port 334 and the first limiting groove 324. If the insulating component 320 melts, the high-temperature, high-pressure gas can reach the explosion-proof valve 360 ​​for pressure relief via the first exhaust port 334.

[0060] Furthermore, by having both the first support member 331 and the first plastic part 321 abut against the electrode body 210, the stability of the electrode assembly 200 within the housing 100 can be effectively increased.

[0061] like Figure 12 and Figure 13 As shown, the first plastic part 321 is provided with a first relief groove 326 on the side near the electrode assembly 200. The first relief groove 326 is connected to the first limiting groove 324, and the first connecting part 3331 is disposed in the first relief groove 326.

[0062] It is understandable that the first connecting part 3331 is avoided by the first clearance groove 326 so that the insulating bracket 330 can be installed on the insulating part 320, and the connection between the insulating bracket 330 and the insulating part 320 has a higher structural compactness, which is beneficial to improving the energy density of the battery cell 1000.

[0063] Furthermore, the insulating bracket 330 also includes a second support member 332, which is connected to one end of the rod-shaped support portion 3333 away from the first connecting portion 3331. The second support member 332 abuts against the electrode body 210. The insulating member 320 also includes a second plastic portion 322 connected to the side of the insulating body 323 facing the electrode body 210. The second plastic portion 322 is provided with a second limiting groove 325, which penetrates the second plastic portion 322 along the first direction Z. The second support member 332 is at least partially disposed within the second limiting groove 325.

[0064] It is understandable that by abutting the second support member 332 against the electrode body 210, the stability of the electrode assembly 200 within the housing 100 can be further increased. By providing a second limiting groove 325 on the second plastic part 322 and placing at least a portion of the second support member 332 within the second limiting groove 325, the second support member 332 can be limited, thereby increasing the stability of the insulating bracket 330.

[0065] like Figure 2 As shown, the second support member 332 is further provided with a second exhaust port 336, which penetrates the second support member 332 along the first direction Z.

[0066] Understandably, when the battery cell 1000 experiences thermal runaway, if the insulating component 320 does not melt, the high-temperature, high-pressure gas can reach the explosion-proof valve 360 ​​for pressure relief via the second vent 336 and the second limiting groove 325. If the insulating component 320 melts, the high-temperature, high-pressure gas can also reach the explosion-proof valve 360 ​​for pressure relief via the second vent 336. Furthermore, by providing the second vent 336 and the second limiting groove 325, the mass of the insulating component 320 and the insulating support 330 can be reduced, which is beneficial for improving the energy density of the battery cell 1000.

[0067] like Figure 12 and Figure 13 As shown, the third support member 333 further includes a second connecting portion 3332. The second connecting portion 3332 is located at the end of the rod-shaped support member 3333 away from the first connecting portion 3331. The second support member 332 is connected to the second connecting portion 3332. The second plastic part 322 is provided with a second clearance groove 327 that communicates with the second limiting groove 325. The second connecting portion 3332 is disposed in the second clearance groove 327.

[0068] It is understandable that the second connecting part 3332 is avoided by the second clearance groove 327 so that the insulating bracket 330 can be installed on the insulating part 320, and the connection between the insulating bracket 330 and the insulating part 320 has a higher structural compactness, which is beneficial to improving the energy density of the battery cell 1000.

[0069] like Figure 3 , Figure 12 and Figure 13 As shown, the battery cell 1000 further includes a second direction X and a third direction Y that intersect the first direction Z in pairs (i.e., the first direction Z, the second direction X, and the third direction Y intersect in pairs). The second exhaust port 336 and the first exhaust port 334 are spaced apart along the second direction X. The first exhaust port 334 includes a plurality of first exhaust holes 3341 arranged along the second direction X and the third direction Y. The first exhaust holes 3341 are arranged through the first support member 331 along the first direction Z and are connected to the first limiting groove 324. The second exhaust port 336 includes a plurality of second exhaust holes 3361 arranged along the third direction Y. The second exhaust holes 3361 are arranged through the second support member 332 along the first direction Z and are connected to the second limiting groove 325.

[0070] It is understandable that by setting multiple first vent holes 3341 and multiple second vent holes 3361, high-temperature and high-pressure gas can be guided to the explosion-proof valve 360 ​​for pressure relief when thermal runaway occurs in the battery cell 1000.

[0071] like Figure 3 , Figure 12 and Figure 13 As shown, further, the first support member 331 and the explosion-proof valve 360 ​​jointly define an exhaust channel 335. The exhaust channel 335 passes through the first support member 331 along the second direction X, and each first exhaust hole 3341 is connected to the exhaust channel 335. It can be understood that, through the setting of the exhaust channel 335, when the battery cell 1000 experiences thermal runaway, the high-temperature and high-pressure gas can sequentially reach the explosion-proof valve 360 ​​for depressurization via the first exhaust hole 3341 and the exhaust channel 335, or it can directly reach the explosion-proof valve 360 ​​for depressurization via the exhaust channel 335.

[0072] like Figure 7 , Figure 12 and Figure 13 As shown, in a specific embodiment, the battery cell 1000 further includes a protective layer 340, which covers the rod-shaped support portion 3333 to isolate the rod-shaped support portion 3333 from the tab 220.

[0073] It is understood that by covering the third support member 333 with the protective layer 340 to isolate the tab 220 and the third support member 333, the wear of the tab 220 by the third support member 333 can be effectively improved, resulting in more stable performance of the battery cell 1000. For example, the protective layer 340 can be a layered structure with elastic deformation capabilities, such as a silicone layer, a rubber layer, or insulating paper; no specific limitation is made on the type of protective layer 340.

[0074] In one embodiment, the insulating bracket 330 is integrally molded from a ceramic material or an insulating glass fiber polymer.

[0075] Understandably, the insulating bracket 330, which is integrally molded from ceramic materials or insulating glass fiber polymer, has the characteristics of high melting point, high insulation and high structural strength, and can better support the tab 220 and the electrode body 210, thereby effectively reducing the possibility of the tab 220 being inserted into the electrode and the explosion-proof valve 360 ​​being blocked.

[0076] like Figures 3 to 6 As shown, in an exemplary embodiment, the battery cell 1000 further includes a cover assembly 300, an insulating film 380, and a bottom support plate 390. The cover assembly 300 includes the aforementioned cover 310, an insulating element 320, an insulating support 330, a protective layer 340, a terminal post 350, an explosion-proof valve 360, and an adapter plate 370. The adapter plate 370 is welded between the terminal post 350 and the tab 220 to achieve electrical connection between the electrode assembly 200 and the terminal post 350. The cover 310 is connected to the housing 100 to cover the receiving cavity 110 of the housing 100. The insulating film 380 is disposed covering the electrode body 210 to achieve insulation between the electrode body 210 and the housing 100. The bottom support plate 390 is connected to the side of the insulating film 380 away from the cover assembly 300 to support the electrode body 210 and increase the stability of the electrode assembly 200 within the housing 100.

[0077] Secondly, embodiments of this application provide a battery pack including the battery cell 1000 in any of the embodiments of the first aspect described above.

[0078] It is understood that since the battery pack provided in this embodiment has the battery cell 1000 in any of the embodiments of the first aspect, it has all the beneficial effects of the battery cell 1000, which will not be described in detail here.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A battery cell, characterized in that, include: Casing (100); An electrode assembly (200) is disposed within the housing (100), and the electrode assembly (200) includes an electrode body (210) and a tab (220) connected to each other; A cover plate (310) is connected to the housing (100), and the cover plate (310) is provided with a pole post (350) and an explosion-proof valve (360); An insulating element (320) is disposed inside the housing (100) and connected to the side of the cover plate (310) facing the electrode assembly (200); An insulating bracket (330) is disposed inside the housing (100) and connected to the insulating member (320) on the side near the electrode assembly (200). The insulating bracket (330) includes a first support member (331) and a third support member (333) connected to each other. The first support member (331) abuts against the electrode body (210) and is provided with a through first exhaust port (334). The first exhaust port (334) is disposed opposite to the explosion-proof valve (360). A portion of the electrode tab (220) is located between the third support member (333) and the insulating member (320) and is electrically connected to the electrode post (350).

2. The battery cell according to claim 1, characterized in that, The third support member (333) includes a first connecting part (3331) and a rod-shaped support part (3333) connected to each other. The first connecting part (3331) is located at one end of the rod-shaped support part (3333) and is connected to the first support member (331). The tab (220) is located between the rod-shaped support part (3333) and the insulating member (320).

3. The battery cell according to claim 2, characterized in that, The battery cell has a first direction (Z). The insulating member (320) includes a first plastic part (321) and an insulating body (323). The insulating body (323) is connected to the side of the cover plate (310) facing the electrode body (210). The first plastic part (321) is connected to the side of the insulating body (323) facing the electrode body (210). The first plastic part (321) abuts against the electrode body (210). The first plastic part (321) is provided with a first limiting groove (324). The first limiting groove (324) penetrates the first plastic part (321) along the first direction (Z). The first support member (331) is at least partially disposed in the first limiting groove (324).

4. The battery cell according to claim 3, characterized in that, The first plastic part (321) is provided with a first clearance groove (326) on the side near the electrode assembly (200). The first clearance groove (326) is connected to the first limiting groove (324), and the first connecting part (3331) is disposed in the first clearance groove (326).

5. The battery cell according to claim 3, characterized in that, The insulating bracket (330) further includes a second support member (332), which is connected to the end of the rod-shaped support portion (3333) away from the first connecting portion (3331). The second support member (332) abuts against the electrode body (210). The insulating member (320) further includes a second plastic portion (322) connected to the side of the insulating body (323) facing the electrode body (210). The second plastic portion (322) is provided with a second limiting groove (325), which penetrates the second plastic portion (322) along the first direction (Z). The second support member (332) is at least partially disposed in the second limiting groove (325).

6. The battery cell according to claim 5, characterized in that, The second support member (332) is provided with a second exhaust port (336), which passes through the second support member (332) along the first direction (Z).

7. The battery cell according to claim 6, characterized in that, The third support member (333) further includes a second connecting part (3332), which is located at the end of the rod-shaped support member (3333) away from the first connecting part (3331). The second support member (332) is connected to the second connecting part (3332). The second plastic part (322) is provided with a second clearance groove (327) that communicates with the second limiting groove (325). The second connecting part (3332) is disposed in the second clearance groove (327).

8. The battery cell according to claim 7, characterized in that, The battery cell also has a second direction (X) and a third direction (Y) that intersect the first direction (Z) in pairs. The first exhaust port (334) includes a plurality of first exhaust holes (3341) arranged along the second direction (X) and the third direction (Y). The first exhaust holes (3341) are disposed through the first support member (331) along the first direction (Z) and are connected to the first limiting groove (324). The second exhaust port (336) includes a plurality of second exhaust holes (3361) arranged along the third direction (Y). The second exhaust holes (3361) are disposed through the second support member (332) along the first direction (Z) and are connected to the second limiting groove (325).

9. The battery cell according to claim 2, characterized in that, The battery cell also includes a protective layer (340), which covers the rod-shaped support (3333) to isolate the rod-shaped support (3333) from the tab (220).

10. A battery pack, characterized in that, Includes the battery cell according to any one of claims 1 to 9.

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