A battery cell and a battery pack

Abstract

This application provides a battery cell and a battery pack, relating to the field of battery technology. The battery cell provided in this application has a first orientation and includes: a housing, an end cap connected to the housing, a terminal post passing through the end cap, an electrode assembly disposed within the housing and electrically connected to the terminal post, and a spraying assembly including an insulating spraying component and a first buffer spraying component. The insulating spraying component is disposed outside the housing, the housing has a first large-area sidewall disposed along the first orientation, and the first buffer spraying component is disposed on the side of the insulating spraying component away from the first large-area sidewall along the first orientation. Because the connection between the first buffer spraying component and the insulating spraying component is more reliable, the use of this first buffer spraying component instead of the existing buffer strip and backing adhesive in the battery cell provided in this application can reduce the risk of displacement, resulting in higher reliability and thus improving the safety of the battery cell in use.

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] Battery cells are a crucial component of battery packs. In existing battery cells, buffer strips are bonded to the insulating coating on the outside of the casing using adhesive, serving to buffer adjacent battery cells and provide expansion gaps. However, this adhesive-based design is susceptible to problems when the battery cell generates heat and reaches excessively high temperatures. High temperatures reduce the adhesive's bonding strength, causing the buffer strips to shift and fail to function, thus compromising the safety of the battery cells. 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 that when the temperature of the battery cell is too high due to heat generation, the buffer strip is prone to displacement and thus cannot play its role.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, embodiments of this application provide a battery cell having a first orientation, the battery cell comprising: case; End cap, connected to the housing; The pole post is inserted into the end cap; An electrode assembly is disposed within the housing and electrically connected to the electrode post; The spraying assembly includes an insulating spraying component and a first buffer spraying component. The insulating spraying component is disposed outside the housing. The housing has a first large-area sidewall disposed along the first direction. The first buffer spraying component is disposed on the side of the insulating spraying component away from the first large-area sidewall along the first direction.

[0006] In some embodiments of the first aspect, the housing has a second large sidewall disposed opposite to the first large sidewall along the first direction, and the spraying assembly further includes a second buffer spraying member disposed on the side of the insulating spraying member away from the second large sidewall along the first direction.

[0007] In some embodiments of the first aspect, there are multiple first buffer spray members, which are spaced apart circumferentially along the first large surface sidewall, and the first buffer spray members are located at the edge of the first large surface sidewall.

[0008] In some embodiments of the first aspect, the battery cell has a second direction perpendicular to the first direction, and the orthographic projections of two adjacent first buffer spray members on a plane perpendicular to the second direction at least partially overlap.

[0009] In some embodiments of the first aspect, the battery cell has a third direction perpendicular to the first direction, and the housing has two small sidewalls disposed opposite each other along the third direction, the small sidewalls being connected to the ends of the first large sidewall along the third direction; The spraying assembly further includes a sealant spraying component, at least one of the small face sidewalls is provided with the sealant spraying component, the sealant spraying component is located on the side of the insulating spraying component away from the small face sidewall along the third direction, and the sealant spraying component forms a sealant blocking space.

[0010] In some embodiments of the first aspect, the adhesive-blocking spraying component includes a plurality of adhesive-blocking spraying strips, which are connected end to end in sequence to form the adhesive-blocking space.

[0011] In some embodiments of the first aspect, the battery cell has a second direction perpendicular to the first direction, the housing has a bottom wall disposed along the second direction, the bottom wall is connected to the end of the first large surface sidewall along the second direction, and the bottom wall and the end cap are disposed opposite to each other along the second direction; The spraying assembly further includes a first reinforcing spraying element, which is disposed on the side of the insulating spraying element away from the bottom wall along the second direction.

[0012] In some embodiments of the first aspect, the battery cell has a third direction that is mutually perpendicular to both the first and second directions, and the first reinforcing sprayed part extends along the third direction and is arranged in a wavy shape.

[0013] In some embodiments of the first aspect, the spraying assembly further includes a second reinforcing spraying member disposed on the side of the insulating spraying member away from the first large surface sidewall along the first direction, the second reinforcing spraying member being spaced apart from the first buffer spraying member.

[0014] Secondly, embodiments of this application provide a battery pack including the battery cells described in any of the embodiments of the first aspect above.

[0015] The beneficial effects of this application are as follows: The battery cell provided in this application includes a spraying assembly, which includes an insulating spraying component and a first buffer spraying component. The insulating spraying component is located outside the housing, and the first buffer spraying component is located on the side of the insulating spraying component away from the first sidewall of the housing along a first direction. That is, during the manufacturing process of the battery cell, after the insulating spraying component is formed, the first buffer spraying component is sprayed again on the insulating spraying component to form the first buffer spraying component. Since the connection between the first buffer spraying component and the insulating spraying component is more reliable, the use of the first buffer spraying component to replace the existing buffer strip and backing adhesive can reduce the risk of displacement and has higher reliability, thereby improving the safety of the battery cell in use.

[0016] 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

[0017] 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.

[0018] Figure 1 This shows a schematic diagram of the battery cell structure from one perspective in an embodiment of this application; Figure 2 It shows Figure 1 A three-dimensional structural diagram of the battery cell hidden behind the sprayed components and housing; Figure 3 This paper shows a schematic diagram of the battery cell structure from another perspective in an embodiment of this application. Figure 4 It shows Figure 3 A three-dimensional structural diagram of the middle shell; Figure 5 This shows another perspective structural schematic diagram of a battery cell in an embodiment of this application; Figure 6 It shows Figure 5 A three-dimensional structural diagram of the middle shell.

[0019] Explanation of key component symbols: 100 - Battery cell; 110 - Housing; 111 - First large sidewall; 112 - Small sidewall; 113 - Bottom wall; 114 - Second large sidewall; 120 - End cap; 130 - Terminal post; 140 - Electrode assembly; 150 - Spraying assembly; 151 - Insulating spraying component; 152 - First buffer spraying component; 153 - Adhesive-blocking spraying component; 1531 - Adhesive-blocking space; 1532 - Adhesive-blocking spraying strip; 154 - First reinforcing spraying component; 155 - Second buffer spraying component; Y - First direction; Z - Second direction; X - Third direction. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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" or "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below" or "below" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] 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, the term "multiple" means two or more, unless otherwise explicitly defined.

[0024] In the description of this application, unless otherwise explicitly specified, the terms "installation," "connection," "attachment," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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.

[0025] In the description of this application, the term "and / or" can be understood to mean three possibilities. For example, A and / or B can represent: A alone; A and B simultaneously; or B alone. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" relationship.

[0026] 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.

[0027] Battery cells are a crucial component of battery packs. Existing battery cells typically incorporate buffer strips, which serve to cushion adjacent cells and provide expansion clearance. During battery cell manufacturing, these buffer strips are adhered to the insulating coating on the outer side of the casing using adhesive. However, this adhesive-based design is susceptible to problems. When the battery cell generates heat and reaches excessively high temperatures, the adhesive's bonding strength decreases, causing the buffer strips to shift and fail to function, thus compromising the safety of the battery cell.

[0028] Furthermore, during the manufacturing process of battery packs, adhesive is typically applied to the small sidewalls of the casing to strengthen the fixation of the individual battery cells; however, the adhesive is prone to overflow, thus affecting the fixation effect on the battery cells. Moreover, as the battery cells expand due to gas generation during long-term use, the casing is prone to deformation, thereby affecting the stability of the battery cells within the battery pack.

[0029] like Figure 1 As shown, to solve the above-mentioned technical problems, embodiments of this application provide a battery cell 100, which relates to the field of battery technology and is mainly used in battery packs, so as to be indirectly used in electrical devices or energy storage devices in the form of battery packs. Of course, the battery cell 100 can also be directly used in electrical devices or energy storage devices without taking the form of a battery pack, and no specific limitation is made to the application scenarios of the battery cell 100 here.

[0030] 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, new energy vehicles, etc., and new energy vehicles can be pure electric vehicles, hybrid electric vehicles, range-extended electric vehicles, etc.; spacecraft can be airplanes, rockets, space shuttles, drones, spacecraft, etc.; 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 include energy storage containers, energy storage cabinets, energy storage power stations, wind power generation devices, solar power generation devices, mobile power devices, temporary power supply devices, etc.; no specific limitations are made on the types of electrical devices and energy storage devices here.

[0031] like Figures 1 to 4 As shown, the battery cell 100 provided in this embodiment has a first direction Y. The battery cell 100 includes: a housing 110, an end cap 120, a terminal post 130, an electrode assembly 140, and a spraying assembly 150.

[0032] The end cap 120 is connected to the housing 110; the electrode post 130 passes through the end cap 120; the electrode assembly 140 is disposed inside the housing 110 and is electrically connected to the electrode post 130; the spraying assembly 150 includes an insulating spraying component 151 and a first buffer spraying component 152. The insulating spraying component 151 is disposed outside the housing 110. The housing 110 has a first large surface sidewall 111 disposed along the first direction Y. The first buffer spraying component 152 is disposed on the side of the insulating spraying component 151 away from the first large surface sidewall 111 along the first direction Y.

[0033] It is understood that the battery cell 100 provided in this embodiment includes a spraying assembly 150, which includes an insulating spraying component 151 and a first buffer spraying component 152. The insulating spraying component 151 is disposed outside the housing 110, and the first buffer spraying component 152 is disposed on the side of the insulating spraying component 151 away from the first sidewall of the housing 110 along the first direction Y. That is, in the manufacturing process of the battery cell 100, after the insulating spraying component 151 is formed, the first buffer spraying component 152 is sprayed again on the basis of the insulating spraying component 151. Since the connection between the first buffer spraying component 152 and the insulating spraying component 151 is more reliable, the use of the first buffer spraying component 152 to replace the existing buffer strip and backing adhesive can reduce the risk of displacement and has higher reliability, thereby improving the safety of the battery cell 100 in use.

[0034] like Figure 5 and Figure 6 As shown, in some embodiments, the housing 110 has a second large surface sidewall 114, which is disposed opposite to the first large surface sidewall 111 along the first direction Y. The spraying assembly 150 also includes a second buffer spraying member 155, which is disposed on the side of the insulating spraying member 151 away from the second large surface sidewall 114 along the first direction Y.

[0035] It is understandable that, since the first buffer spraying component 152 is provided at the first large sidewall 111 and the second buffer spraying component 155 is provided at the second large sidewall 114, that is, the housing 110 has a buffer structure on both opposite sides along the first direction Y. This can make the buffering effect between adjacent battery cells 100 better and reserve a larger expansion gap, thereby helping to further improve the safety of the battery cells 100.

[0036] like Figure 3 and Figure 4 As shown, in some embodiments, there are multiple first buffer spraying elements 152, which are spaced apart circumferentially along the first large surface sidewall 111 and located at the edge of the first large surface sidewall 111. This makes the interaction force distribution between adjacent battery cells 100 more balanced, which helps to improve the stability of the battery cells 100 and avoids the main expansion area of ​​the battery cells 100 (the main expansion area is located in the middle of the first large surface sidewall 111), so that the first buffer spraying elements 152 can better play their role of reserving expansion gaps and buffering.

[0037] like Figure 1 and Figure 3 As shown, the battery cell 100 further has a second direction Z perpendicular to the first direction Y, and the orthographic projections of two adjacent first buffer spray members 152 on a plane perpendicular to the second direction Z at least partially overlap. This increases the coverage area of ​​the first buffer spray member 152 at the edge of the first large surface sidewall 111, allowing it to better perform its buffering and expansion gap reserving functions.

[0038] For example, the plane perpendicular to the second direction Z may be the bottom wall 113 of the housing 110, or the side of the end cap 120 along the second direction Z near the electrode assembly 140. No specific limitation is made on this plane here.

[0039] It should be noted that the above-mentioned design for the first buffer spraying component 152, such as the design of the first buffer spraying component 152 located at the edge of the first large surface sidewall 111, and the design of two adjacent first buffer spraying components 152 having at least partial overlap in their orthogonal projections on a plane perpendicular to the second direction Z, are also applicable to the second buffer spraying component 155, and will not be elaborated here.

[0040] like Figure 1 and Figure 6 As shown, in some embodiments, the battery cell 100 has a third direction X perpendicular to the first direction Y, and the housing 110 has two small sidewalls 112 disposed opposite to each other along the third direction X. The small sidewalls 112 are connected to the ends of the first large sidewall 111 along the third direction X. The spraying assembly 150 also includes a glue-blocking spraying member 153. At least one small sidewall 112 is provided with a glue-blocking spraying member 153. The glue-blocking spraying member 153 is located on the side of the insulating spraying member 151 away from the small sidewall 112 along the third direction X. The glue-blocking spraying member 153 forms a glue-blocking space 1531.

[0041] It is understandable that the adhesive-blocking spraying part 153 is located on the side of the insulating spraying part 151 away from the small sidewall 112 along the third direction X. It can be understood that in the process of manufacturing the battery cell 100, after the insulating spraying part 151 is formed, the adhesive-blocking spraying part 153 is sprayed again on the basis of the insulating spraying part 151. The adhesive-blocking space 1531 formed by the adhesive-blocking spraying part 153 can contain the adhesive and limit the flow range of the adhesive, so as to reduce the possibility of the adhesive overflowing to the small sidewall 112, thereby improving the fixing effect of the adhesive on the battery cell 100.

[0042] like Figure 1 and 3 As shown, the adhesive-blocking spraying component 153 further includes multiple adhesive-blocking spraying strips 1532, which are connected end to end to form an adhesive-blocking space 1531. It can be understood that the multiple adhesive-blocking spraying strips 1532 form a ring structure, which can better limit the flow range of the adhesive and further reduce the possibility of the adhesive overflowing outside the small sidewall 112.

[0043] like Figures 1 to 4 As shown, in some embodiments, the battery cell 100 has a second direction Z perpendicular to the first direction Y, the housing 110 has a bottom wall 113 disposed along the second direction Z, the bottom wall 113 is connected to the end of the first large surface side wall 111 along the second direction Z, and the bottom wall 113 and the end cap 120 are disposed opposite each other along the second direction Z; the spraying assembly 150 further includes a first reinforcing spraying member 154, the first reinforcing spraying member 154 is disposed on the side of the insulating spraying member 151 away from the bottom wall 113 along the second direction Z.

[0044] It is understandable that by spraying a first reinforcing coating 154 on the basis of the insulating coating 151, the structural strength of the bottom wall 113 of the housing 110 can be enhanced. This can improve the situation where the bottom wall 113 is deformed outward due to the expansion of internal gas during the use of the battery cell 100, which affects the stability of the battery cell 100 in the battery pack. At the same time, it can reduce the risk of displacement of the battery cell 100 under vibration conditions, thereby improving the safety of the battery cell 100 in use.

[0045] like Figure 1 and Figure 3 As shown, the battery cell 100 further has a third direction X that is perpendicular to both the first direction Y and the second direction Z. The first reinforcing sprayed part 154 extends along the third direction X and is arranged in a wavy shape, which can more effectively enhance the structural strength of the bottom wall 113 of the housing 110.

[0046] In some embodiments, the spraying assembly 150 further includes a second reinforcing spraying member, which is disposed on the side of the insulating spraying member 151 away from the first large surface sidewall 111 along the first direction Y, and the second reinforcing spraying member is spaced apart from the first buffer spraying member 152.

[0047] It is understandable that by spraying a second reinforcing coating on the insulating coating 151, the structural strength of the first large sidewall 111 of the housing 110 can be enhanced. This can improve the situation where the first large sidewall 111 is deformed outward due to internal gas expansion during the use of the battery cell 100, thus affecting the stability of the battery cell 100 in the battery pack. At the same time, it can reduce the risk of displacement of the battery cell 100 under vibration conditions, thereby improving the safety of the battery cell 100 in use.

[0048] In some embodiments, the spraying assembly 150 further includes a third reinforcing spraying member disposed on the side of the insulating spraying member 151 away from the second large surface sidewall 114 along the first direction Y. The third reinforcing spraying member is spaced apart from the second buffer spraying member 155, which can enhance the structural strength of the second large surface sidewall 114 of the housing 110.

[0049] It should be noted that the second and third reinforcing sprayed parts can also be arranged in a wavy shape; of course, the shape is not limited to a wavy shape. In other embodiments, the first reinforcing sprayed part 154 / the second reinforcing sprayed part / the third reinforcing sprayed part can also be V-shaped, U-shaped, straight, etc., without specific limitations here.

[0050] For example, the materials of the spraying assembly 150 (including the insulating spraying component 151, the first buffer spraying component 152, the second buffer spraying component 155, the adhesive-blocking spraying component 153, the first reinforcing spraying component 154, and the second reinforcing spraying component) can be selected from: the cured product of polyolefin and polyphenylene ether after co-heating, the product of bisphenol A type epoxy resin and polyamide after co-heating and curing, polypropylene, polyethylene, polyvinyl chloride, etc., without specific limitations.

[0051] For example, the materials of the end cap 120 and / or the housing 110 can be aluminum, aluminum alloy, copper, iron, stainless steel, plastic, etc., without specific limitations.

[0052] For example, the material of the electrode 130 can be a metallic conductive material (e.g., copper, aluminum, silver, gold, iron, nickel, etc.) or a non-metallic conductive material (e.g., carbon-based material, superconductor, semiconductor, etc.), without specific limitations.

[0053] It should be noted that the battery cell 100 provided in this embodiment mainly relies on the movement of metal ions between the positive and negative electrode plates to operate. The battery cell 100 can be cuboid, cylindrical, flat, or other shapes, and no specific limitation is made here. According to the packaging method, the battery cell 100 provided in this embodiment can be a square battery, a cylindrical battery, a pouch battery, etc., and no specific limitation is made here.

[0054] Furthermore, according to the classification of the physical state of the electrolyte, the battery cell 100 provided in this embodiment can be a liquid battery, that is, it uses a liquid electrolyte. Exemplarily, the electrode post 130 may include a positive electrode post and a negative electrode post. The electrode assembly 140 may be manufactured using a winding process or a stacking process. The electrode assembly 140 may include an electrode body and electrode tabs, the electrode tabs including a positive electrode tab and a negative electrode tab. The electrode body is immersed in the liquid electrolyte and includes a positive electrode sheet, a negative electrode sheet, and a separator layer. The separator layer is disposed between the positive electrode sheet and the negative electrode sheet. The material of the separator layer can be polypropylene, polyethylene, etc. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The positive electrode tab is connected to the positive current collector and to the positive electrode post. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative electrode tab is connected to the negative current collector and to the negative electrode post. Taking lithium ions as an example, the materials for the positive electrode current collector and the positive electrode tab can be aluminum, and the materials for the positive electrode active material layer can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganese oxide, etc.; the materials for the negative electrode current collector and the negative electrode tab can be copper, and the negative electrode active material can be graphite, silicon, etc.

[0055] Of course, the battery cell 100 provided in this embodiment can also be a solid-state battery, that is, a solid electrolyte, such as sulfide, oxide or polymer electrolyte. Solid electrolyte can replace the separator and liquid electrolyte, and has both ion conduction and isolation functions. The type of battery cell 100 is not specifically limited here.

[0056] To address the aforementioned technical problems, embodiments of this application also provide a battery pack, including the battery cell 100 from any of the above embodiments.

[0057] It is understood that since the battery pack provided in this embodiment has the battery cell 100 in any of the above embodiments, it has all the beneficial effects of the battery cell 100, which will not be described in detail here.

[0058] In the description of this application, the terms "some embodiments," "one embodiment," "example," "specific example," "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 the description of this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, 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.

[0059] 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 by, Having a first orientation (Y), the battery cell includes: Casing (110); End cap (120) is connected to the housing (110); The pole post (130) is inserted through the end cap (120); An electrode assembly (140) is disposed within the housing (110) and electrically connected to the electrode post (130); The spraying assembly (150) includes an insulating spraying component (151) and a first buffer spraying component (152). The insulating spraying component (151) is disposed outside the housing (110). The housing (110) has a first large surface sidewall (111) disposed along the first direction (Y). The first buffer spraying component (152) is disposed on the side of the insulating spraying component (151) away from the first large surface sidewall (111) along the first direction (Y).

2. The battery cell according to claim 1, characterized in that, The housing (110) has a second large sidewall (114), which is disposed opposite to the first large sidewall (111) along the first direction (Y). The spraying assembly (150) further includes a second buffer spraying member (155), which is disposed on the side of the insulating spraying member (151) away from the second large sidewall (114) along the first direction (Y).

3. The battery cell according to claim 1, characterized in that, The number of the first buffer spraying parts (152) is multiple, and the multiple first buffer spraying parts (152) are arranged circumferentially along the first large surface sidewall (111), and the first buffer spraying parts (152) are located at the edge of the first large surface sidewall (111).

4. The battery cell according to claim 3, characterized in that, The battery cell has a second direction (Z) perpendicular to the first direction (Y), and the orthographic projections of two adjacent first buffer spray parts (152) on a plane perpendicular to the second direction (Z) at least partially overlap.

5. The battery cell according to claim 1, characterized in that, The battery cell has a third direction (X) perpendicular to the first direction (Y), and the housing (110) has two small sidewalls (112) arranged opposite to each other along the third direction (X). The small sidewalls (112) are connected to the end of the first large sidewall (111) along the third direction (X). The spraying assembly (150) further includes a sealant spraying element (153), which is provided at least on one of the facet sidewalls (112). The sealant spraying element (153) is located on the side of the insulating spraying element (151) away from the facet sidewall (112) along the third direction (X), and the sealant spraying element (153) forms a sealant space (1531).

6. The battery cell according to claim 5, characterized in that, The adhesive-blocking spraying component (153) includes multiple adhesive-blocking spraying strips (1532), and the multiple adhesive-blocking spraying strips (1532) are connected end to end in sequence to form the adhesive-blocking space (1531).

7. The battery cell according to claim 1, characterized in that, The battery cell has a second direction (Z) perpendicular to the first direction (Y), and the housing (110) has a bottom wall (113) arranged along the second direction (Z). The bottom wall (113) is connected to the end of the first large side wall (111) along the second direction (Z). The bottom wall (113) and the end cap (120) are arranged opposite to each other along the second direction (Z). The spraying assembly (150) further includes a first reinforcing spraying element (154), which is disposed on the side of the insulating spraying element (151) away from the bottom wall (113) along the second direction (Z).

8. The battery cell according to claim 7, characterized in that, The battery cell has a third direction (X) that is perpendicular to both the first direction (Y) and the second direction (Z), and the first reinforcing sprayed part (154) extends along the third direction (X) and is arranged in a wavy shape.

9. The battery cell according to claim 1, characterized in that, The spraying assembly (150) further includes a second reinforcing spraying component, which is disposed on the side of the insulating spraying component (151) away from the first large surface sidewall (111) along the first direction (Y), and the second reinforcing spraying component is spaced apart from the first buffer spraying component (152).

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

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