Cover plate assembly and battery

Abstract

The application provides a cover plate assembly and a battery. The cover plate assembly comprises a top cover, a mounting hole for mounting a battery pole is arranged on the top cover; an adapter plate is arranged between the pole and a battery cell, the pole is welded to the adapter plate to form a welding area; a first groove is arranged on the adapter plate, and a groove opening of the first groove is away from the pole. The application enables the molten metal to fill into the first groove, thereby avoiding affecting the strength of other parts of the adapter plate.

Description

Technical Field

[0001] This application relates to a cover plate assembly and a battery, belonging to the field of new energy battery technology. Background Technology

[0002] A battery is a device that converts chemical energy into electrical energy. It is widely used in daily life, and with the development of the battery industry, the requirements for battery performance are becoming increasingly stringent.

[0003] In the process of conceiving and implementing this application, the applicant discovered at least the following problems: when the adapter piece is welded to the pole, the adapter piece and the pole in the welding area will melt, causing the metal material in the welding area to be squeezed to the surrounding area, affecting the strength of the part outside the welding area of ​​the adapter piece.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0005] This application provides a cover plate assembly and a battery, such that molten metal fills the first groove, avoiding affecting the strength of other parts of the adapter piece.

[0006] One aspect of this application provides a cover assembly for a battery, the cover assembly comprising:

[0007] The top cover has mounting holes for installing battery terminals;

[0008] The adapter plate is located between the terminal and the battery cell. The terminal is welded to the adapter plate to form a welding area.

[0009] The adapter plate has a first groove, and the opening of the first groove is away from the pole.

[0010] The beneficial effects of the above technical solution are: by providing a first groove on the adapter plate, the first groove provides an additional space for the welding area to accommodate the molten metal, ensuring that the metal in the welding area will not overflow into other parts of the adapter plate, and the remaining parts will not be affected by the high temperature and metal flow during the welding process, thereby improving the overall quality and consistency of the welding. Attached Figure Description

[0011] The above and other objects, features, and advantages of embodiments of this application will become more readily understood through the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application will be described by way of example and non-limitation, wherein:

[0012] Figure 1 This is a schematic diagram of the battery structure according to an embodiment of this application;

[0013] Figure 2This is a first-view structural schematic diagram of the cover plate assembly according to an embodiment of this application;

[0014] Figure 3 This is a structural schematic diagram of the cover plate assembly from a second perspective according to an embodiment of this application;

[0015] Figure 4 This is an exploded view of the cover plate assembly according to an embodiment of this application.

[0016] Figure 5 This is an exploded view of the cover plate assembly according to an embodiment of this application from a second perspective;

[0017] Figure 6 This is a first-view structural schematic diagram of the adapter piece in the cover plate assembly according to an embodiment of this application;

[0018] Figure 7 This is a schematic diagram of the adapter piece in the cover plate assembly according to an embodiment of this application from a second perspective.

[0019] Figure 8 This is a schematic diagram of the structure of the first type of second groove of the pole post in the cover plate assembly of this application embodiment;

[0020] Figure 9 This is a schematic diagram of the structure of the second type of second groove of the pole post in the cover plate assembly of this application embodiment;

[0021] Figure 10 This is a schematic diagram of the structure of the first type of first groove of the adapter piece in the cover plate assembly of this application embodiment;

[0022] Figure 11 This is a schematic diagram of the structure of the second type of first groove in the cover plate assembly of this application embodiment;

[0023] Figure 12 This is a first-view structural schematic diagram of the pole post in the cover plate assembly according to an embodiment of this application;

[0024] Figure 13 This is a structural schematic diagram of the pole post in the cover plate assembly according to an embodiment of this application from a second perspective.

[0025] Figure label:

[0026] 100 - Cover plate assembly;

[0027] 110 - Top Cover;

[0028] 111 - Mounting hole;

[0029] 120-Adapter;

[0030] 121 - First groove;

[0031] 1211 - First section;

[0032] 130-Pole Column;

[0033] 131 - Second groove;

[0034] 1311 - Second section;

[0035] 140 - Insulating parts;

[0036] 200-battery;

[0037] 210 - Housing. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. All other obtained embodiments are within the scope of protection of this application. In the absence of conflict, the following embodiments and features can be combined with each other.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "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 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 that the first feature is at a lower horizontal level than the second feature.

[0041] 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.

[0042] In the process of conceiving and implementing this application, the applicant discovered at least the following problems: when the adapter piece is welded to the pole, the adapter piece and the pole in the welding area will melt, causing the metal material in the welding area to be squeezed to the surrounding area, affecting the strength of the part outside the welding area of ​​the adapter piece.

[0043] The cover plate assembly proposed in this application provides an additional space for the welding area by providing a first groove on the adapter plate. This first groove ensures that the metal in the welding area will not overflow into other parts of the adapter plate, and the remaining parts will not be affected by the high temperature and metal flow during the welding process, thereby improving the overall quality and consistency of the welding.

[0044] The cover plate assembly provided in this application will be described in detail below with reference to specific embodiments.

[0045] Figure 1 This is a schematic diagram of the battery structure according to an embodiment of this application. Figure 2 This is a first-view structural schematic diagram of the cover plate assembly according to an embodiment of this application. Figure 3 This is a structural schematic diagram of the cover plate assembly from a second perspective according to an embodiment of this application. Figure 4 This is an exploded view of the cover plate assembly according to an embodiment of this application. Figure 5 This is an exploded view of the cover plate assembly from a second perspective according to an embodiment of this application.

[0046] like Figures 1 to 5 As shown in the embodiment of this application, a cover plate assembly 100 is provided for a battery 200. The cover plate assembly 100 includes:

[0047] The top cover 110 has mounting holes 111 for mounting the pole post 130;

[0048] The adapter piece 120 is located between the terminal 130 and the cell of the battery 200. The terminal 130 is welded to the adapter piece 120 to form a welding area D.

[0049] The adapter plate 120 is provided with a first groove 121, and the groove opening of the first groove 121 is away from the pole post 130.

[0050] It should be noted that the addition of the top cover 110 provides an additional protective layer for the battery 200, enhancing the integrity of the overall structure.

[0051] The top cover 110 effectively protects the battery cell from external environmental influences such as moisture, dust, and physical impacts, thereby improving the durability and reliability of the battery 200. The top cover 110 not only provides physical protection but also acts as a protective barrier for the battery 200, reducing the risk of internal short circuits and other potential safety hazards.

[0052] It should be noted that the battery 200 also includes a terminal post 130. The top cover 110 is provided with a mounting hole 111. The terminal post 130 passes through the mounting hole 111 and is electrically connected to the tab of the battery cell. The main function of the terminal post 130 is to conduct the electricity on the tab of the battery cell to the outside of the top cover 110 for easy use.

[0053] In some embodiments, the electrode post 130 is generally made of a material with good electrical conductivity, such as copper or aluminum.

[0054] It should be noted that the adapter 120 is responsible for connecting the terminal 130 to the battery cell, ensuring efficient current conduction.

[0055] In some embodiments, the adapter plate 120 is typically designed to be flat or curved to accommodate the space constraints and installation requirements of the battery 200; its thickness and width need to be optimized according to the current load capacity to ensure sufficient conductivity and mechanical strength.

[0056] It should be noted that the first groove 121 provides an additional space for the welding area D to accommodate the molten metal, thereby reducing stress concentration caused by metal expansion and flow during the welding process, and helping to reduce the risk of material fatigue and fracture around the welding area D.

[0057] By providing a dedicated space to accommodate excess welding material, the first groove 121 helps ensure that the metal in the welding area D does not overflow into other parts of the adapter piece 120, thereby improving the overall quality and consistency of the weld and reducing the possibility of welding defects.

[0058] In other words, since the molten metal is confined within the first groove 121, the rest of the adapter piece 120 is not affected by the high temperature and metal flow during the welding process, thus protecting the structural integrity of the adapter piece 120 and ensuring its mechanical and electrical properties during the use of the battery 200.

[0059] In some embodiments, the cover assembly 100 further includes an insulating member 140 disposed on the side of the top cover 110 facing the battery cell.

[0060] Insulator 140 provides electrical insulation to prevent short circuits between electrodes or other conductive components inside battery 200.

[0061] In some embodiments, the top cover 110 is generally made of metal, so the insulating member 140 is located between the top cover 110 and the battery cell for insulation.

[0062] With the above-mentioned configuration, namely, by providing a first groove 121 on the adapter piece 120, the first groove 121 provides an additional space for the welding area D to accommodate the molten metal, ensuring that the metal in the welding area D will not overflow into other parts of the adapter piece 120, and the remaining parts will not be affected by the high temperature and metal flow during the welding process, thereby improving the overall quality and consistency of the welding.

[0063] Figure 6 This is a first-view structural schematic diagram of the adapter piece in the cover plate assembly according to an embodiment of this application. Figure 7 This is a structural schematic diagram of the adapter piece in the cover plate assembly according to an embodiment of this application from a second perspective.

[0064] like Figure 6 and Figure 7 As shown, in some alternative embodiments, the first groove 121 forms an enclosing area;

[0065] Along the thickness direction of the cover plate assembly 100, the projection of the welding area D on the adapter piece lies within the enclosed area.

[0066] It should be noted that by limiting the projection C of the welding area D to within the projection of the first groove 121, it is ensured that the molten metal material during the welding process can be effectively contained within the first groove 121. This prevents the welding material from overflowing into other areas of the adapter piece 120, thereby avoiding potential impact on the surrounding structure.

[0067] By confining the projection C of the welding area D within the enclosure of the first groove 121, the impact of thermal and mechanical stresses generated during welding on other parts of the adapter piece 120 can be reduced. This helps to reduce stress concentration and decrease the risk of material fatigue and fracture.

[0068] By rationally designing the position and size of the first groove 121, the metal flow in the welding area D is ensured to be limited to the first groove 121, thereby maintaining the overall structural integrity of the adapter piece 120.

[0069] like Figure 6As shown. In some alternative embodiments, along the thickness direction of the cover plate assembly 100, the distance L between the projected edge of the welding area D on the adapter piece 120 and the groove edge of the first groove 121 is greater than or equal to 0.5 mm and less than or equal to 8 mm.

[0070] It should be noted that by controlling the distance between 0.5mm and 8mm, it is ensured that the molten metal can flow smoothly into the groove. This distance is neither too large for the metal to reach the groove, nor too small for the welding area D to coincide with the groove, thereby optimizing the flow and distribution of the welding material.

[0071] In some embodiments, L can be 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm or any one of these values.

[0072] Specifically, the appropriate distance prevents the solder mark from overlapping with the first groove 121, reducing the possibility of welding defects. By avoiding designing the groove to be too deep, the structural strength of the adapter piece 120 is maintained. The reasonable distance ensures that the groove depth is moderate, accommodating an appropriate amount of metal without weakening the mechanical properties of the adapter piece 120.

[0073] By optimizing the relative position of the welding area D and the groove, the safety and reliability of the battery 200 during use are ensured, and the potential risks caused by welding failure are reduced.

[0074] Figure 8 This is a schematic diagram of the structure of the first type of second groove of the pole post in the cover plate assembly of this application embodiment. Figure 9 This is a schematic diagram of the structure of the second type of second groove of the pole post in the cover plate assembly of this application embodiment.

[0075] like Figure 5 , Figure 8 as well as Figure 9 As shown, in some alternative embodiments, a second groove 131 is formed on the pole post 130, and the second groove 131 faces the adapter piece 120.

[0076] It should be noted that the second groove 131 provides additional space for the welding area D to accommodate the metal material.

[0077] Specifically, the second groove 131 can accommodate the metal material from the side of the adapter piece 120 facing the electrode post 130 during welding, while the first groove 121 can accommodate the metal material from the side of the adapter piece 120 away from the electrode post 130 during welding. By adding the second groove 131, the metal material from both sides of the adapter piece 120 can be accommodated in the corresponding grooves during welding of the electrode post 130 and the adapter piece 120, resulting in better performance.

[0078] In some alternative embodiments, along the thickness direction of the cover assembly 100, the projection of the second groove 131 lies within the projection of the first groove 121.

[0079] It should be noted that in actual welding operations, the first groove 121 is used to accommodate the molten material on the adapter piece 120, and the second groove 131 is used to accommodate the molten material on the pole piece 130. Since the amount of molten material that needs to be accommodated on the adapter piece 120 is larger, the amount that needs to be accommodated on the pole piece 130 is smaller. Therefore, the projection of the second groove 131 can be limited to the projection of the first groove 121, which effectively manages the flow and distribution of welding material while ensuring the strength of the pole piece 130 and the adapter piece 120.

[0080] The larger size of the first groove 121 provides sufficient space to accommodate excess welding material, reducing material overflow and unevenness outside the welding area D.

[0081] The larger size of the first groove 121 helps to better manage heat distribution during the welding process and prevent localized overheating. This protects the material properties of the pole 130 and the adapter plate 120, extending the life of the assembly.

[0082] In some alternative embodiments, at least one of the first groove 121 and the second groove 131 is an annular structure.

[0083] It should be noted that the annular structure provides a continuous path, allowing the molten metal during the welding process to flow and distribute evenly within either the first groove 121 or the second groove 131.

[0084] The ring structure helps to evenly distribute the stress generated during welding, reducing stress concentration. This lowers the risk of material fatigue and fracture, and improves the durability of the component.

[0085] In some embodiments, the first groove 121 is an annular structure. Alternatively, the second groove 131 is an annular structure. Or, both the first groove 121 and the second groove 131 are annular structures.

[0086] Figure 10 This is a schematic diagram of the structure of the first groove of the adapter piece in the cover plate assembly according to an embodiment of this application. Figure 11This is a schematic diagram of the structure of the second type of first groove in the cover plate assembly of this application embodiment.

[0087] like Figure 6 , Figure 7 , Figure 10 and Figure 11 As shown, in some optional embodiments, the first groove 121 includes a plurality of first groove segments 1211, which surround the periphery of the projection surface of the welding area D.

[0088] like Figure 8 and Figure 9 , Figure 12 as well as Figure 13 As shown, the second groove 131 includes a plurality of second groove segments 1311, which surround the periphery of the welding area D.

[0089] It should be noted that the design of multiple groove segments provides multiple independent spaces to accommodate excess metal generated during the welding process. The design of multiple groove segments surrounding the welding area D guides the metal flow.

[0090] By using multiple first groove segments 1211, the shape and distribution of the first groove 121 can be flexibly adjusted according to specific application requirements. Similarly, by using multiple second groove segments 1311, the shape and distribution of the second groove 131 can be flexibly adjusted according to specific application requirements to adapt to different battery 200 specifications and performance requirements.

[0091] like Figure 10 and Figure 11 As shown, in some optional embodiments, the plurality of first slot segments 1211 are interconnected; or,

[0092] At least two adjacent first slot segments 1211 are not connected.

[0093] like Figure 8 and Figure 9 As shown, multiple second slot segments 1311 are interconnected; or,

[0094] At least two adjacent second slot segments 1311 are not connected.

[0095] It should be noted that the connected grooves allow the molten metal to flow freely between the grooves during the welding process, thereby achieving a more uniform metal distribution; the non-connected grooves can ensure that the metal material is contained while the strength of the adapter piece 120 is high.

[0096] In some embodiments, a plurality of first groove segments 1211 are interconnected, such that the first groove 121 is in a connected state and can accommodate metal materials from different directions.

[0097] In some embodiments, two adjacent first groove segments 1211 are not connected, that is, there is a protruding structure between two adjacent first groove segments 1211, which is more suitable for situations where there is less metal overflow during welding, and can ensure the strength of the adapter piece 120.

[0098] Furthermore, the structure of the second slot 1311 can be referenced from that of the first slot 1211, and will not be elaborated further.

[0099] In some embodiments, when two adjacent first slot segments 1211 are not connected, the lengths of the multiple first slot segments 1211 can be the same or different, one can be longer or one can be shorter, and no further restrictions are imposed here.

[0100] In summary, the design strategy of choosing multiple interconnected first slot segments 1211 and second slot segments 1311, or at least two adjacent first slot segments 1211 and two adjacent second slot segments 1311 that are not interconnected, depends on the specific application requirements. Interconnected slot segments are suitable for applications requiring uniform distribution and simplified manufacturing, while disconnected slot segments are suitable for situations where there is less metal overflow during welding, and can ensure the strength of the adapter piece 120.

[0101] In some embodiments, the second groove 131 can be a linear structure, a ring structure, or a structure with identification characteristics such as letters, Chinese characters, or symbols.

[0102] In some alternative embodiments, the groove depth H1 of the first groove 121 is greater than or equal to 0.1 mm and less than or equal to 1 mm; and / or,

[0103] The groove depth H2 of the second groove 131 is greater than or equal to 0.1 mm and less than or equal to 1 mm; and / or,

[0104] The groove width K1 of the first groove 121 is greater than or equal to 0.2 mm and less than or equal to 2 mm; and / or,

[0105] The groove width K2 of the second groove 131 is greater than or equal to 0.2 mm and less than or equal to 2 mm.

[0106] It should be noted that by reasonably determining the groove depth and width of the first groove 121, the strength of the adapter piece 120 can be maintained while ensuring the effective containment and distribution of welding materials, thereby improving the welding quality and the overall performance of the component.

[0107] In some embodiments, the groove depth H1 of the first groove 121 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm or any value thereof.

[0108] In some embodiments, the groove depth H2 of the second groove 131 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm or any one of these values.

[0109] Furthermore, excessive groove depth may weaken the mechanical strength of the adapter piece 120 because too much material is removed, resulting in a decrease in structural integrity. Insufficient groove depth may not be able to contain molten metal, causing it to overflow into other parts of the adapter piece 120, thereby affecting the strength of the remaining parts of the adapter piece 120.

[0110] In some embodiments, the groove width K1 of the first groove 121 can be 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm or any value thereof.

[0111] In some embodiments, the groove width K2 of the second groove 131 can be 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm or any value thereof.

[0112] Furthermore, an appropriate groove width provides sufficient space to distribute welding material, ensuring the uniformity and strength of the weld joint. An excessively wide groove width may also weaken the strength of the adapter piece 120 because too much material is removed. An excessively narrow groove width restricts the flow of welding material, failing to accommodate molten metal, causing it to overflow into other parts of the adapter piece 120, thus affecting the strength of the remaining portions of the adapter piece 120.

[0113] The cover assembly provided in this application includes: a top cover with mounting holes for mounting terminals; an adapter piece located between the terminals and the battery cell, wherein the terminals are welded to the adapter piece to form a welding area; and a first groove provided on the adapter piece, wherein the opening of the first groove is away from the terminals.

[0114] By providing a first groove on the adapter plate, the first groove provides an additional space for the welding area to accommodate the molten metal, ensuring that the metal in the welding area does not overflow into other parts of the adapter plate, and the remaining parts are not affected by the high temperature and metal flow during the welding process, thereby improving the overall quality and consistency of the welding.

[0115] In addition, this application embodiment also provides a battery 200, including a housing 210, a battery cell, and the aforementioned cover plate assembly 100;

[0116] The battery cell is electrically connected to the terminal 130 of the cover plate assembly 100, and the housing 210 has a receiving cavity in which the battery cell is located.

[0117] In some examples, the housing 210 can be a rectangular structure, and the size of the housing 210 can be greater than or equal to the size of the battery cell, so that the housing 210 can support the battery cell.

[0118] It is understandable that the purpose of the containment cavity is to contain the battery cell. It is also easy to understand that the containment cavity is sealed to prevent side reactions from occurring within the battery cell's internal system, which could then affect the battery cell's performance.

[0119] For example, the size or shape of the receiving cavity is matched with the size and shape of the battery cell. Specifically, adjustments can be made according to the actual situation, and the embodiments of this application do not impose too many limitations here.

[0120] In this embodiment, the battery cell can be configured as a rectangular structure. The battery cell can be located inside the housing 210.

[0121] Understandably, the housing 210 can be used to support the battery cell.

[0122] The dimensions of the aforementioned housing 210 can be set according to actual needs, and this embodiment of the application does not impose any restrictions on them.

[0123] In addition, it should be noted that the shape of the shell 210 is not limited in this embodiment. For example, the shell 210 can be a regular shape such as a cuboid or a cylinder. Of course, the shell 210 can also be other irregular shapes.

[0124] In some embodiments, the housing 210 protects the battery cell. The housing 210 may be composed of two parts joined together for easy installation. The housing 210 may be a metal shell. Specifically, the material of the housing 210 may be stainless steel, which is sturdy and corrosion-resistant. Of course, the housing 210 may also be made of other materials, and this embodiment does not impose any specific limitations on this.

[0125] In some embodiments, an aluminum-plastic film is provided on the outside of the battery cell.

[0126] For example, the aluminum-plastic film can be composed of a nylon layer, an aluminum foil layer, a heat-sealing layer, and an adhesive for bonding. The innermost layer is a heat-sealing layer, which can be made of polypropylene material, serving as a sealing and bonding agent. Polypropylene material has good heat-sealing adhesion to metals Ni and Al and electrode tabs, and has electrolyte resistance, insulation, and puncture resistance. The middle layer can be made of aluminum foil, specifically pure aluminum or aluminum-iron alloy, which can react with oxygen in the air at room temperature to form an oxide film, preventing oxygen and moisture from entering and thus protecting the internal battery cell. The outermost layer can be made of nylon, which has good impact resistance, puncture resistance, heat resistance, insulation, and abrasion resistance, and is used to protect the aluminum foil layer from scratches and reduce the impact and vibration caused to the battery 200 by drops, thus protecting the internal components.

[0127] It should be noted that the specific structure of the cover plate assembly 100 is not limited here, but can be referred to the above.

[0128] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are 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, and therefore should not be construed as a limitation of this application.

[0129] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended 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. Such 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.

Claims

1. A cover plate assembly (100) for a battery (200), characterized by, The cover plate assembly (100) includes: The top cover (110) has mounting holes (111) for mounting the battery (200) terminals (130); An adapter piece (120) is located between the terminal (130) and the cell of the battery (200), and the terminal (130) is welded to the adapter piece (120) to form a welding area; The adapter plate (120) is provided with a first groove (121), and the groove opening of the first groove (121) is away from the pole post (130).

2. The cover plate assembly (100) according to claim 1, characterized in that The first groove (121) forms an enclosing area; Along the thickness direction of the cover plate assembly (100), the projection of the welding area on the adapter piece (120) lies within the enclosed area.

3. The cover plate assembly (100) according to claim 2, characterized in that Along the thickness direction of the cover plate assembly (100), the distance L between the projection edge of the welding area on the adapter piece (120) and the groove edge of the first groove (121) is greater than or equal to 0.5 mm and less than or equal to 8 mm.

4. The cover plate assembly (100) according to any one of claims 1-3, characterized in that, A second groove (131) is formed on the pole post (130), and the second groove (131) faces the adapter piece (120).

5. The cover plate assembly (100) according to claim 4, characterized in that, Along the thickness direction of the cover plate assembly (100), the projection of the second groove (131) lies within the projection of the first groove (121).

6. The cover plate assembly (100) according to claim 4, characterized in that, At least one of the first groove (121) and the second groove (131) is an annular structure.

7. The cover plate assembly (100) according to claim 4, characterized in that, The first groove (121) includes a plurality of first groove segments (1211), which surround the periphery of the projection surface of the welding area; The second groove (131) includes a plurality of second groove segments (1311) surrounding the periphery of the welding area.

8. The cover plate assembly (100) according to claim 7, characterized in that, Multiple first slot segments (1211) are interconnected; or, At least two adjacent first slot segments (1211) are not connected; and / or, Multiple second slot segments (1311) are interconnected; or, At least two adjacent second slot segments (1311) are not connected.

9. The cover plate assembly (100) according to claim 4, characterized in that, The groove depth H1 of the first groove (121) is greater than or equal to 0.1 mm and less than or equal to 1 mm; and / or, The groove depth H2 of the second groove (131) is greater than or equal to 0.1 mm and less than or equal to 1 mm; and / or, The groove width K1 of the first groove (121) is greater than or equal to 0.2 mm and less than or equal to 2 mm; And / or, The groove width K2 of the second groove (131) is greater than or equal to 0.2 mm and less than or equal to 2 mm.

10. A battery (200), characterized in that, Includes a housing (210), a battery cell, and a cover assembly (100) as described in any one of claims 1 to 9; The battery cell is electrically connected to the terminal (130) of the cover plate assembly (100), and the housing (210) has a receiving cavity in which the battery cell is located.

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