Cover plate structure and battery

Abstract

The utility model provides a kind of cover plate structure and battery, belong to battery technical field, cover plate structure includes first cover plate, first pole post, first lower plastic and insulating part being arranged on first cover plate, and connecting portion being arranged between first lower plastic and insulating part. Among them, first pole post is used to and the first lug of pole group is connected, insulating part can be connected with first lower plastic by connecting portion, and abuts on the side of first lug opposite to first pole post. The cover plate structure of the utility model can fix the first lug after welding, limit the shake and displacement of first lug in the process of battery use, transportation etc.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cover plate structure and a battery. Background Technology

[0002] In the battery manufacturing process, the welding of the battery tabs to the terminals on the cover plate is a critical step, and its welding quality directly affects the battery's electrical performance and safety. However, in existing technologies, after the battery tabs are welded to the terminals on the cover plate, the welded tabs are prone to shaking, displacement, or even loosening during subsequent use, transportation, and storage. This not only reduces the battery's stability but may also lead to abnormal internal connections, thereby affecting the overall performance of the battery and, in severe cases, potentially causing safety hazards such as short circuits. Utility Model Content

[0003] In view of this, the present invention aims to provide a cover plate structure to fix the tabs after they are connected to the terminal posts, thereby improving battery stability.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A cover plate structure includes a first cover plate, a first pole post, a first lower plastic and an insulating component disposed on the first cover plate, and a connecting portion disposed between the first lower plastic and the insulating component;

[0006] The first pole post is used to connect to the first tab of the pole group, and the insulating member can be connected to the first lower plastic through the connecting part and abut against the side of the first tab opposite to the first pole post.

[0007] Furthermore, the insulating component is provided with an adhesive that can bond the insulating component to the first electrode tab.

[0008] Furthermore, the connecting portion includes a snap-fit ​​post disposed on one of the first lower plastic and the insulating member, and a snap-fit ​​hole disposed on the other of the first lower plastic and the insulating member;

[0009] The snap-fit ​​post snaps into the snap-fit ​​hole and snaps the first lower plastic part together with the insulating part.

[0010] Furthermore, the first lower plastic includes a main body, and a first protrusion and a second protrusion disposed at both ends of the main body, with the first protrusion and the second protrusion defining an installation space between them;

[0011] The insulating component includes an insulating plate disposed within the installation space, and at least one of the first protrusion and the second protrusion is provided with a limiting groove, a portion of the insulating plate being located within the limiting groove and abutting against the side wall of the limiting groove.

[0012] Furthermore, a limiting protrusion is provided on one side of the main body between the first protrusion and the second protrusion;

[0013] The first electrode tab can be inserted into the mounting space from the other side of the main body, and the limiting protrusion is used to abut against the first electrode tab to limit the insertion displacement of the first electrode tab.

[0014] Furthermore, the first cover plate is provided with an injection hole corresponding to the first protrusion, the first protrusion is provided with an injection cavity communicating with the injection hole, and a plurality of outlet holes located at the bottom of the injection cavity;

[0015] The plurality of liquid outlet holes and the liquid injection holes are offset from each other in the axial direction of the liquid injection holes.

[0016] Furthermore, the first cover plate is provided with an explosion-proof valve corresponding to the second protrusion;

[0017] The second protrusion is provided with an exhaust chamber corresponding to the explosion-proof valve, and an exhaust hole located at the bottom of the exhaust chamber.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] (1) The cover plate structure of this utility model, by setting an insulating component and connecting the insulating component to the first lower plastic part through a connecting part, so that the insulating component abuts against the side of the first electrode tab opposite to the first electrode post, can fix the first electrode tab after welding, and can limit the shaking and displacement of the first electrode tab during battery use and transportation, thereby effectively avoiding abnormal internal connections of the battery due to loosening of the first electrode tab, thus improving the structural stability and reliability of the battery. In addition, the setting of the insulating component can also effectively isolate the first electrode tab from other components, prevent the first electrode tab from accidentally conducting electricity with surrounding components, effectively avoid safety hazards such as short circuits, and provide good insulation protection for the battery, which is conducive to enhancing the safety of the battery during use.

[0020] (2) By applying an adhesive to the insulating component, which bonds the insulating component to the first tab, the movement of the first tab can be further restricted, effectively preventing the first tab from loosening or falling off. Simultaneously, the adhesive layer can cover the solder joint between the first tab and the terminal post, preventing weld slag from falling off and causing foreign matter in the battery. Furthermore, the adhesive is convenient and quick to use, shortening assembly time and improving production efficiency.

[0021] (3) The connecting part includes a snap-fit ​​post on one of the first lower plastic and the insulating component, and a snap-fit ​​hole on the other of the first lower plastic and the insulating component. The structure is simple and easy to design and implement. Moreover, the snap-fit ​​post and the snap-fit ​​hole can form a tight fit, which can provide good connection strength for the first lower plastic and the insulating component, and help ensure that the first electrode remains fixed during battery use, avoiding battery performance degradation or safety hazards due to loose connection.

[0022] (4) The first lower plastic part defines the installation space through the first and second protrusions, which can provide a clear reference for the installation position of the insulating board and effectively avoid problems such as offset and misalignment of the insulating board during assembly. At the same time, the abutting fit between the limiting groove and the insulating board further constrains the insulating board from the side, which helps to ensure the stable abutment of the insulation against the first electrode and ensures the reliability of the electrode fixing effect.

[0023] (5) By setting a limiting protrusion, when the first electrode is inserted into the installation space from the other side of the main body, the limiting protrusion abuts against the first electrode, which can limit its insertion displacement and prevent the first electrode from being inserted too deep or too shallow. This helps to ensure that the first electrode quickly reaches the preset installation position, thereby ensuring the accuracy of the connection between the first electrode and the first electrode post and improving the reliability of the battery electrical connection.

[0024] (6) By providing multiple injection holes on the first cover plate and an injection chamber and an outlet on the first protrusion, it is convenient to inject electrolyte into the battery casing and the injection speed of the electrolyte can be reduced. At the same time, multiple outlet holes disperse the injection pressure to different positions, avoiding excessive local pressure and reducing the risk of damage to the internal structure of the battery due to pressure impact. By offsetting the outlet holes from the injection holes in the axial direction of the injection holes, it is possible to prevent the electrolyte from directly impacting the electrode assembly and causing damage to the electrode assembly.

[0025] (7) By setting an explosion-proof valve on the first cover plate and setting an exhaust chamber and exhaust hole corresponding to the explosion-proof valve on the second protrusion, the high-pressure gas inside the battery can be released in time, which can effectively prevent the internal structure of the battery from being damaged due to long-term high pressure, such as diaphragm deformation and electrode material falling off.

[0026] Another objective of this utility model is to provide a battery comprising a housing, an electrode assembly disposed within the housing, a cover plate structure as described above disposed at one end of the housing, and a cover plate assembly disposed at the other end of the housing body.

[0027] The battery described in this invention, by setting the cover structure as described above, can effectively prevent abnormal internal connections caused by loosening of the first electrode tab, thereby improving the structural stability and reliability of the battery. At the same time, it can also effectively avoid safety hazards such as short circuits, providing good insulation protection for the battery and enhancing safety during use.

[0028] Furthermore, by including an end plate that abuts between the second lower plastic and the electrode assembly in the cover plate assembly, the overall stability of the battery can be improved. Moreover, by providing a bending space on the end plate and an opening communicating with the bending space, the second tab of the electrode assembly can enter the bending space through the opening, effectively preventing the second tab from contacting the internal structure of the battery and causing a short circuit.

[0029] Furthermore, by including a limiting plate in the end plate, the movement of the second tab can be further restricted, effectively preventing the second tab from coming out of the bending space, thereby effectively preventing the second tab from contacting the internal structure of the battery and causing a short circuit. Attached Figure Description

[0030] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0031] Figure 1 This is a schematic diagram of the cover plate structure described in an embodiment of the present utility model from a first perspective;

[0032] Figure 2 This is a schematic diagram of the cover plate structure described in an embodiment of the present utility model from a second perspective;

[0033] Figure 3 This is a schematic diagram of the cover plate structure described in an embodiment of the present utility model from a third-person perspective;

[0034] Figure 4 This is a schematic diagram of the cover plate structure described in an embodiment of the present utility model from a fourth perspective;

[0035] Figure 5 This is a schematic diagram of the structure of the insulating component described in an embodiment of the present utility model;

[0036] Figure 6 This is a schematic diagram of the battery structure according to an embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of the battery structure described in an embodiment of the present invention from another perspective;

[0038] Figure 8 for Figure 7 Sectional view of line AA in the middle;

[0039] Figure 9 for Figure 8 Enlarged view of section B;

[0040] Figure 10 for Figure 8 Enlarged view of section C;

[0041] Figure 11 This is a schematic diagram of the decomposition and explosion of the battery described in an embodiment of the present invention;

[0042] Figure 12 This is a schematic diagram of the end plate described in an embodiment of the present invention from a first-view perspective;

[0043] Figure 13 This is a schematic diagram of the end plate described in an embodiment of the present invention from a second perspective.

[0044] Figure 14 This is a schematic diagram of the end plate described in an embodiment of the present invention from a third-person perspective;

[0045] Figure 15 for Figure 14 A cross-sectional view of the DD line.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. First cover plate; 101. Injection hole; 102. Explosion-proof valve;

[0048] 2. First lower plastic part; 201. First protrusion; 2011. Liquid outlet; 202. Second protrusion; 2021. Vent; 203. Limiting protrusion; 204. Snap-fit ​​post; 205. Limiting groove;

[0049] 3. Insulating board; 301. Snap-fit ​​hole;

[0050] 4. First pole post; 5. Housing; 6. Pole assembly; 7. First tab; 8. First upper plastic; 9. Second cover plate; 10. Second tab;

[0051] 11. End plate; 1101. First side wall; 1102. Second side wall; 1103. Limiting plate; 1104. Vent chamber; 1105. Vent hole;

[0052] 12. Second pole;

[0053] K. Installation space. Detailed Implementation

[0054] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0055] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0057] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0058] Given that in the existing technology, after the battery tabs are welded to the terminals on the cover plate, the welded tabs are prone to shaking, displacement, or even loosening during the subsequent use, transportation, and storage of the battery, thus reducing the stability of the battery.

[0059] Therefore, an embodiment of the first aspect of this utility model provides a novel cover plate structure, which, in its overall structure, includes a first cover plate 1, a first pole post 4, a first lower plastic 2, and an insulating member disposed on the first cover plate 1, and a connecting portion disposed between the first lower plastic 2 and the insulating member. The first pole post 4 is used to connect to the first electrode lug 7 of the electrode assembly 6, and the insulating member can be connected to the first lower plastic 2 through the connecting portion and abuts against the side of the first electrode lug 7 opposite to the first pole post 4.

[0060] Therefore, by incorporating an insulating component and connecting it to the first lower plastic part 2 via a connecting portion, the insulating component abuts against the side of the first tab 7 facing away from the first terminal post 4. This effectively secures the welded first tab 7, limiting its movement and displacement during battery use and transportation. This prevents internal connection abnormalities caused by loosening of the first tab 7, thereby improving the battery's structural stability and reliability. Furthermore, the insulating component isolates the first tab 7 from other components, preventing accidental electrical conduction and effectively avoiding short circuits and other safety hazards. This provides excellent insulation protection for the battery, enhancing its safety during use.

[0061] Based on the above overall introduction, specifically, as an exemplary structural form, combined with Figure 1 middle Figure 3 As shown, the cover plate structure is rectangular in shape. In specific implementation, it can be used as a positive electrode cover plate or a negative electrode cover plate.

[0062] It should be noted that, similar to existing technology, this cover plate structure includes, in addition to the aforementioned first pole post 4, first lower plastic 2, and insulating component, a first upper plastic 8 disposed on the other side of the first cover plate 1, a first riveting block riveted to the first pole post 4, and a first sealing component disposed between the first pole post 4 and the first cover plate 1. The first upper plastic 8 serves to insulate the riveting block and the first cover plate, while the first sealing component insulates the first cover plate 1 from the first pole post 4. Furthermore, the arrangement of the components is consistent with existing technology and will not be elaborated further here. This embodiment focuses on describing the lower plastic 2 and the insulating component.

[0063] In some exemplary embodiments, an adhesive is provided on the insulating component, which can bond the insulating component to the first tab 7. It is understood that by bonding the insulating component to the first tab 7, the movement of the first tab 7 can be further restricted, effectively preventing the first tab 7 from loosening or falling off. Simultaneously, the adhesive layer can also cover the solder joint between the first tab 7 and the terminal post, preventing solder slag from falling off after welding and causing foreign matter in the battery. Moreover, the adhesive is convenient and quick to use, shortening assembly time and improving production efficiency. Furthermore, in specific implementations, the adhesive can be a pressure-sensitive adhesive or other commonly used adhesives.

[0064] In some exemplary embodiments, the connecting portion includes a snap-fit ​​post 204 disposed on one of the first lower plastic 2 and the insulating member, and a snap-fit ​​hole 301 disposed on the other of the first lower plastic 2 and the insulating member. The snap-fit ​​post 204 snaps into the snap-fit ​​hole 301, thus snapping the first lower plastic 2 and the insulating member together. That is, the snap-fit ​​post 204 can be disposed on either the lower plastic or the insulating member as needed, and as a preferred embodiment, such as... Figure 3 and Figure 4 As shown, the snap-fit ​​post 204 is usually provided on the first lower plastic 2, while the snap-fit ​​hole 301 is provided on the insulating part.

[0065] This structure is simple and easy to design and implement. Moreover, the snap-fit ​​post 204 and the snap-fit ​​hole 301 can form a tight fit, which can provide good connection strength between the first lower plastic 2 and the insulating component, and help ensure that the first tab 7 remains fixed during battery use, avoiding battery performance degradation or safety hazards due to loose connection.

[0066] In some exemplary embodiments, the first lower plastic 2 includes a body and a first protrusion 201 and a second protrusion 202 disposed at both ends of the body, defining an installation space K between the first protrusion 201 and the second protrusion 202. The insulating member includes an insulating plate 3 disposed within the installation space K, and at least one of the first protrusion 201 and the second protrusion 202 is provided with a limiting groove 205, a portion of the insulating plate 3 is located within the limiting groove 205 and abuts against the sidewall of the limiting groove 205.

[0067] In specific implementation, combined with Figures 3 to 5 As shown in the illustration, as an exemplary structure, the first protrusion 201 and the second protrusion 202 are arranged symmetrically along the length of the main body, and both the first protrusion 201 and the second protrusion 202 are provided with limiting grooves 205, which are U-shaped. Furthermore, to further improve the structural strength of the first lower plastic 2, interwoven reinforcing ribs are also provided on the main body within the installation space K. Specifically, the aforementioned snap-fit ​​posts 204 are two located within the two limiting grooves 205.

[0068] Furthermore, the insulating plate 3 is adapted to the installation space K, and its two side walls can abut against the side walls of the two limiting grooves 205 to further improve the installation firmness of the insulating plate 3, thereby improving the fixing effect on the first electrode tab 7. Moreover, the material of the insulating plate 3 is the same as that of the first lower plastic 2, and can be PP (polypropylene), PPS (polyphenylene sulfide), or PC (polycarbonate), etc., to have electrolyte resistance and insulation properties. In addition, the thickness of the insulating plate 3 can be set to 0.3mm-1.5mm, and its molding process can be made by various conventional processes such as die cutting, injection molding, or 3D printing.

[0069] In some exemplary embodiments, a limiting protrusion 203 is provided on one side of the main body, located between the first protrusion 201 and the second protrusion 202. Furthermore, the first electrode tab 7 can be inserted into the mounting space K from the other side of the main body, and the limiting protrusion 203 abuts against the first electrode tab 7 to limit the insertion displacement of the first electrode tab 7.

[0070] At this point, it is understandable that by setting the limiting protrusion 203, when the first electrode 7 is inserted into the installation space K from the other side of the main body, the limiting protrusion 203 abuts against the first electrode 7, which can limit its insertion displacement and prevent the first electrode 7 from being inserted too deeply or too shallowly. This helps to ensure that the first electrode 7 quickly reaches the preset installation position, thereby ensuring the accuracy of the connection between the first electrode 7 and the first electrode post 4 and improving the reliability of the battery electrical connection.

[0071] In practical implementation, as an exemplary structure, it is combined with Figure 3 and Figure 4As shown, the limiting protrusion 203 is an elongated strip connecting the first protrusion 201 and the second protrusion 202, in order to further improve the structural strength of the first lower plastic 2. It can be understood that the limiting protrusion 203, in addition to being a... Figure 3 The elongated structure shown can also be multiple structures spaced apart along the length of the main body.

[0072] In some exemplary embodiments, the first cover plate 1 is provided with an injection hole 101 corresponding to the first protrusion 201, the first protrusion 201 is provided with an injection cavity communicating with the injection hole 101, and a plurality of outlet holes 2011 located at the bottom of the injection cavity, and the plurality of outlet holes 2011 are offset from the injection hole 101 in the axial direction of the injection hole 101.

[0073] Here, by providing multiple injection holes 101, injection chambers, and outlets, it is convenient to inject electrolyte into the battery casing 5 and the injection rate of electrolyte can be reduced. At the same time, multiple outlet holes 2011 distribute the injection pressure to different locations, avoiding excessive local pressure and reducing the risk of damage to the internal structure of the battery due to pressure impact. By offsetting the outlet holes 2011 from the injection holes 101 in the axial direction of the injection holes 101, it is possible to prevent the electrolyte from directly impacting the electrode assembly 6 and causing damage or debris to the electrode assembly 6.

[0074] In specific implementation, combined with Figures 2 to 4 As shown in the illustration, as an exemplary embodiment, in the thickness direction of the first lower plastic 2, the first protrusion 201 is positioned to block the position of the injection hole 101, thereby achieving that the multiple outlet holes 2011 are offset from the injection hole 101 axially. This prevents electrolyte from directly entering the battery and damaging its internal structure. Furthermore, to further reduce impact force, such as... Figure 3 As shown, the first protrusion 201 has a plurality of liquid outlet holes 2011 arranged at intervals in both the length and width directions.

[0075] Furthermore, since the inclusion of the injection cavity reduces the structural strength of the first lower plastic 2, in practice, multiple interwoven reinforcing ribs can be added within the injection cavity, dividing it into multiple sub-cavities. To facilitate electrolyte flow between these sub-cavities, the height of the reinforcing ribs should be less than the height of the injection cavity.

[0076] In some exemplary embodiments, the first cover plate 1 is provided with an explosion-proof valve 102 corresponding to the second protrusion 202. Simultaneously, the second protrusion 202 is provided with an exhaust chamber corresponding to the explosion-proof valve 102, and an exhaust hole 2021 located at the bottom of the exhaust chamber. It is understood that by providing the explosion-proof valve 102 on the first cover plate 1 and providing the exhaust chamber and exhaust hole 2021 corresponding to the explosion-proof valve 102 on the second protrusion 202, the high-pressure gas inside the battery can be released in a timely manner, effectively preventing damage to the internal structure of the battery due to long-term exposure to high pressure, such as separator deformation and electrode material detachment.

[0077] In specific implementation, as an exemplary implementation form, it will still refer to... Figures 2 to 4 As shown, to improve exhaust uniformity, the exhaust holes 2021 are arranged in a rectangular array on the second protrusion 202. Similarly, the arrangement of the exhaust chamber reduces the structural strength of the first lower plastic 2. Therefore, in a specific implementation, multiple interwoven reinforcing ribs can be further provided within the exhaust chamber, dividing it into multiple sub-cavities. Furthermore, in a specific implementation, the height of the reinforcing ribs should be less than the height of the exhaust chamber.

[0078] It is worth noting that, regarding the cover plate structure of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still referred to... Figures 1 to 5 As shown, it also includes a first cover plate 1, a first pole post 4, a first lower plastic 2, and an insulating component.

[0079] The first lower plastic component 2 includes a main body and a first protrusion 201 and a second protrusion 202 located at both ends of the main body. An installation space K is defined between the first protrusion 201 and the second protrusion 202, and both the first protrusion 201 and the second protrusion 202 are provided with limiting grooves. Furthermore, a limiting protrusion 203 is provided on one side of the main body, located between the first protrusion 201 and the second protrusion 202. The first electrode tab 7 can be inserted into the installation space K from the other side of the main body. The limiting protrusion 203 abuts against the first electrode tab 7 to limit the insertion displacement of the first electrode tab 7.

[0080] In addition, the first cover plate 1 is provided with an injection hole 101 corresponding to the first protrusion 201. The first protrusion 201 is provided with an injection chamber communicating with the injection hole 101, and a plurality of outlet holes 2011 located at the bottom of the injection chamber. The plurality of outlet holes 2011 are offset from the injection hole 101 in the axial direction. Furthermore, the first cover plate 1 is provided with an explosion-proof valve 102 corresponding to the second protrusion 202. Moreover, the second protrusion 202 is provided with an exhaust chamber corresponding to the explosion-proof valve 102, and an exhaust hole 2021 located at the bottom of the exhaust chamber.

[0081] The insulating component is a rectangular insulating plate 3, which is bonded to the first lower plastic 2 with pressure-sensitive adhesive. Both ends of the insulating plate 3 are located within corresponding limiting grooves 205 and abut against the sidewalls of the limiting grooves 205. The connecting portion includes two snap-fit ​​holes 301 at both ends of the insulating plate 3 along its length, and two snap-fit ​​posts 204 on the first lower plastic 2. The two snap-fit ​​posts 204 are respectively snapped into the snap-fit ​​holes 301 at their respective ends.

[0082] In the preferred embodiment of the above cover plate structure, the specific structure of the first lower plastic 2 and the insulating component can still be referred to the description in the above exemplary embodiments. In this preferred embodiment, the beneficial effects brought about by the design of the first lower plastic 2, the insulating component, etc. can also be referred to the description in the above exemplary embodiments.

[0083] The cover structure of this embodiment, through the above design, can fix the welded first tab 7, limiting its shaking and displacement during battery use and transportation, thereby improving the structural stability and reliability of the battery. Simultaneously, it can effectively prevent accidental electrical conduction between the first tab 7 and surrounding components, effectively avoiding safety hazards such as short circuits, and providing good insulation protection for the battery.

[0084] A second aspect of the present invention provides a battery comprising a housing 5, an electrode assembly 6 disposed within the housing 5, a cover plate structure as described above disposed at one end of the housing 5, and a cover plate assembly disposed at the other end of the housing 5.

[0085] In some exemplary embodiments, the cover plate assembly includes a second cover plate 9, a second pole post 12 passing through the second cover plate 9, a second lower plastic piece disposed on the second cover plate 9, and an end plate 11 abutting between the second lower plastic piece and the pole assembly 6. Furthermore, the end plate 11 has a bending space and an opening communicating with the bending space, through which the second pole tab 10 of the pole assembly 6 enters the bending space.

[0086] At this point, it is understood that by including an end plate 11 that abuts between the second lower plastic and the electrode assembly 6, the overall stability of the battery can be improved. Moreover, by providing a bending space on the end plate 11 and an opening communicating with the bending space, the second tab 10 of the electrode assembly 6 enters the bending space through the opening, which can effectively prevent the second tab 10 from contacting the internal structure of the battery and causing a short circuit.

[0087] Similar to existing technologies, the second cover plate 9 includes the aforementioned second pole 12, first pole 4, second lower plastic component, and end plate 11. This cover plate assembly also includes a second upper plastic component located on the other side of the second cover plate 9, a second riveting block riveted to the second pole 12, and a sealing element located between the first pole 4 and the second cover plate 9. The second upper plastic component insulates the second riveting block and the second cover plate 9, while the second sealing element insulates the second cover plate 9 from the second pole 12. The arrangement of the components is consistent with existing technologies and will not be elaborated further here. This embodiment focuses on the end plate 11.

[0088] Furthermore, the arrangement of the housing 5, the electrode group 6, and the insulating film between them can all refer to existing technologies and will not be described in detail here. It should be noted, however, that in order to improve the insulation effect, part of the first lower plastic 2 is wrapped with the insulating film and heat-fused together.

[0089] In specific implementation, combined with Figures 11 to 15 As shown in the illustration, in one exemplary embodiment, both the second cover plate 9 and the end plate 11 are rectangular, conforming to the shape of the first cover plate 1. Furthermore, the end plate 11 is specifically made of an insulating material, and the diaphragm of the electrode assembly 6 partially covers the end plate 11 and is thermally fused to it. Ventilation chambers 1104 are provided at both ends of the end plate 11 along its length, and multiple reinforcing ribs are provided within each ventilation chamber 1104, dividing each ventilation chamber 1104 into multiple sub-ventilation chambers 1104. Additionally, multiple ventilation holes 1105 are provided on the side of the end plate 11 away from the second lower plastic layer, with each ventilation hole 1105 corresponding to one of the multiple sub-ventilation chambers 1104.

[0090] In some of the exemplary implementations, such as Figures 13 to 15 As shown, the end plate 11 includes a first sidewall 1101 and a second sidewall 1102 arranged opposite to each other, and a limiting plate 1103 disposed on the first sidewall 1101 at the end away from the second lower plastic. Furthermore, the limiting plate 1103 and the second sidewall 1102 define an opening, and the limiting plate 1103 is inclined toward the second lower plastic in the direction close to the second sidewall 1102.

[0091] It is understandable that by including the limiting plate 1103 in the end plate 11, the movement of the second tab 10 can be further restricted, effectively preventing the second tab 10 from coming out of the bending space, thereby effectively preventing the second tab 10 from contacting the internal structure of the battery and causing a short circuit.

[0092] The battery in this embodiment, by providing the cover structure described above, can effectively prevent abnormal internal connections caused by loosening of the first tab 7, thereby improving the structural stability and reliability of the battery. At the same time, it can also effectively avoid safety hazards such as short circuits, providing good insulation protection for the battery and enhancing safety during use.

[0093] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cover plate structure, characterized in that: It includes a first cover plate (1), a first pole post (4), a first lower plastic (2) and an insulating component disposed on the first cover plate (1), and a connecting portion disposed between the first lower plastic (2) and the insulating component; The first pole post (4) is used to connect with the first tab (7) of the pole group (6). The insulating member can be connected to the first lower plastic (2) through the connecting part and abut against the side of the first tab (7) opposite to the first pole post (4).

2. The cover plate structure according to claim 1, characterized in that: The insulating component is provided with an adhesive that can bond the insulating component to the first tab (7).

3. The cover plate structure according to claim 1, characterized in that: The connecting part includes a snap-fit ​​post (204) provided on one of the first lower plastic (2) and the insulating member, and a snap-fit ​​hole (301) provided on the other of the first lower plastic (2) and the insulating member; The snap-fit ​​post (204) snaps into the snap-fit ​​hole (301) and snaps the first lower plastic (2) together with the insulating component.

4. The cover plate structure according to any one of claims 1 to 3, characterized in that: The first lower plastic (2) includes a main body, and a first protrusion (201) and a second protrusion (202) disposed at both ends of the main body, wherein an installation space (K) is defined between the first protrusion (201) and the second protrusion (202); The insulating component includes an insulating plate (3) disposed in the mounting space (K), and at least one of the first protrusion (201) and the second protrusion (202) is provided with a limiting groove (205), and part of the insulating plate (3) is located in the limiting groove (205) and abuts against the side wall of the limiting groove (205).

5. The cover plate structure according to claim 4, characterized in that: One side of the main body is provided with a limiting protrusion (203) located between the first protrusion (201) and the second protrusion (202); The first electrode tab (7) can be inserted into the mounting space (K) from the other side of the body, and the limiting protrusion (203) is used to abut against the first electrode tab (7) to limit the insertion displacement of the first electrode tab (7).

6. The cover plate structure according to claim 4, characterized in that: The first cover plate (1) is provided with an injection hole (101) corresponding to the first protrusion (201), the first protrusion (201) is provided with an injection cavity communicating with the injection hole (101), and a plurality of outlet holes (2011) located at the bottom of the injection cavity; The plurality of liquid outlet holes (2011) and the liquid injection holes (101) are offset from each other in the axial direction of the liquid injection holes (101).

7. The cover plate structure according to claim 4, characterized in that: The first cover plate (1) is provided with an explosion-proof valve (102) corresponding to the second protrusion (202); The second protrusion (202) is provided with an exhaust chamber corresponding to the explosion-proof valve (102) and an exhaust hole (2021) located at the bottom of the exhaust chamber.

8. A battery, characterized in that: It includes a housing (5), an electrode assembly (6) disposed within the housing (5), a cover structure of any one of claims 1 to 6 disposed at one end of the housing (5), and a cover assembly disposed at the other end of the housing (5).

9. The battery according to claim 8, characterized in that: The cover plate assembly includes a second cover plate (9), a second pole post (12) passing through the second cover plate (9), a second lower plastic on the second cover plate (9), and an end plate (11) abutting between the second lower plastic and the pole group (6); The end plate (11) is provided with a bending space and an opening communicating with the bending space. The second electrode tab (10) of the electrode group (6) enters the bending space through the opening.

10. The battery according to claim 9, characterized in that: The end plate (11) includes a first side wall (1101) and a second side wall (1102) arranged opposite to each other, and a limiting plate (1103) disposed on the first side wall (1101) away from the second lower plastic end; The limiting plate (1103) and the second sidewall (1102) define the opening, and the limiting plate (1103) is inclined toward the second lower plastic side in the direction close to the second sidewall (1102).

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