High-thermal-resistance battery cover plate and battery

Abstract

The utility model relates to a high thermal resistance battery cover plate and a battery, and provides a high thermal resistance battery cover plate, which comprises a cover plate body, an upper plastic component and a pole component, the upper plastic component is arranged at the top of the cover plate body, and the pole component penetrates through the cover plate body to be connected with the upper plastic component. The upper plastic component comprises upper plastic, a heat insulation piece and a riveting aluminum block, and the heat insulation piece is arranged on the periphery of the riveting aluminum block in a sleeving mode and clamped between the riveting aluminum block and the upper plastic. According to the scheme of the utility model, the problem of bad products caused by upper plastic melting when the battery is assembled into the module busbar and the riveting aluminum block is welded is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a high heat resistance battery cover plate and a battery. Background Art

[0002] Lithium batteries have the advantages of high energy and many cycles, and are widely used in various fields. Lithium batteries are usually composed of a casing, a battery cell and a cover plate. As an important component of the battery structure, the cover plate directly affects the battery performance and safety. When assembling the battery module, the busbar and the riveted aluminum block of the cover plate are generally welded through a penetration welding process. The welding process generates a large amount of heat, causing the upper plastic near the riveted aluminum block to melt, resulting in defective products. In the prior art, a certain gap is usually set between the riveted aluminum block and the upper plastic. However, the short-range air gap cannot effectively insulate, and the upper plastic may still undergo irreversible melting. Utility Model Content

[0003] In view of the above-mentioned problems, the purpose of the present invention is to provide a high heat-resistance battery cover and a battery, so as to solve the problem of defective products caused by melting of plastic when assembling the battery into a module busbar and welding it to the riveted aluminum block.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A high heat resistance battery cover is provided, comprising a cover body, an upper plastic component, and a pole component, wherein the upper plastic component is mounted on the top of the cover body, and the pole component passes through the cover body and is connected to the upper plastic component, characterized in that the upper plastic component comprises an upper plastic, a heat insulating member, and a riveted aluminum block, and the heat insulating member is sleeved on the outer periphery of the riveted aluminum block and clamped between the riveted aluminum block and the upper plastic.

[0006] A heat insulating member is provided between the upper plastic and the riveted aluminum block. The heat insulating member is sleeved on the outer periphery of the riveted aluminum block so that the riveted aluminum block is placed in the upper plastic without contacting the surface of the upper plastic. When the busbar is welded to the riveted aluminum block, the heat is blocked when it is conducted to the heat insulating member through the riveted aluminum block, thereby reducing the heat transfer to the upper plastic and avoiding irreversible melting deformation of the upper plastic.

[0007] Furthermore, the outer circumference of the riveted aluminum block is recessed inward to form a stepped groove, and the stepped groove includes a first groove wall extending in a vertical direction, and a second groove wall extending in a horizontal direction. The thermal insulation component includes a vertical portion and a horizontal portion, and the vertical portion and the horizontal portion are respectively abutted against the first groove wall and the second groove wall.

[0008] The outer periphery of the riveted aluminum block is designed to be a stepped groove structure. The heat insulating piece is sleeved on the riveted aluminum block and fits tightly with the first groove wall and the second groove wall, so that the side and bottom surfaces of the riveted aluminum block are wrapped in the heat insulating piece, thereby effectively blocking the conduction of heat.

[0009] Furthermore, the surface of the vertical portion facing away from the first groove wall is flush with the circumferential surface of the riveted aluminum block, and the surface of the horizontal portion facing away from the second groove wall is flush with the bottom surface of the riveted aluminum block.

[0010] The surface of the heat insulation piece is flush with the surface of the riveted aluminum block, and the end face of the heat insulation piece is against the end face of the step groove of the riveted aluminum block. After the heat insulation piece is mounted on the riveted aluminum block, it is like a whole, and the combination of the two has better stability.

[0011] Furthermore, the upper plastic sleeve is arranged on the outer side of the thermal insulation component.

[0012] The heat insulating piece is sleeved on the riveted aluminum block and then installed in the upper plastic. The top surface of the upper plastic is lower than the top surface of the heat insulating piece, thereby ensuring that the upper plastic does not contact the riveted aluminum block.

[0013] Furthermore, the cover body is provided with a first positioning portion, the upper plastic is placed in the first positioning portion, a boss is provided at the bottom of the upper plastic, the first positioning portion is provided with a groove, and the boss is engaged with the groove.

[0014] After the upper plastic, the heat insulating member and the riveted aluminum block are assembled, they are installed on the first mounting portion on the top of the cover body and positioned by the groove and boss engaging structure, thereby ensuring that the upper plastic component will not move or twist after installation.

[0015] Furthermore, the pole assembly comprises a sealing ring, a base plate and a connecting column, and the sealing ring is sleeved on the connecting column.

[0016] The pole assembly passes through the cover body and is riveted to the upper plastic assembly. The bottom plate is welded to the battery cell tab. The sealing ring ensures the sealing of the pole assembly and the upper plastic assembly after riveting.

[0017] Furthermore, the cover plate body is provided with a second positioning portion, the pole assembly is placed in the second positioning portion, a positioning block is provided on the edge of the second positioning portion, and the positioning block is engaged with the side surface of the bottom plate.

[0018] The pole assembly is mounted on the second mounting portion of the cover body, and the positioning block on the edge of the second mounting portion is engaged with the bottom plate of the pole assembly, ensuring that the pole assembly will not move during riveting.

[0019] Furthermore, the second positioning portion is provided with a first through hole, the upper plastic is provided with a second through hole, and the connecting column passes through the first through hole and the second through hole and extends into the upper plastic component.

[0020] After the upper plastic component is installed on the first positioning portion, the first through hole and the second through hole are connected, and the connecting column passes through the first through hole and the second through hole and is riveted to the upper plastic component, so that the upper plastic component, the cover body and the pole component are connected into a whole component.

[0021] Furthermore, the second through hole is provided with a step groove, and the top of the sealing ring abuts against the step groove.

[0022] The sealing ring passes through the first through hole, and the top of the sealing ring is tightly against the step groove of the second through hole, so as to ensure the airtightness of the cover plate after riveting connection.

[0023] The utility model also provides a battery, comprising the high heat resistance battery cover plate.

[0024] The battery of the utility model is provided with the above-mentioned high heat-resistance battery cover plate, and a heat insulating member is provided between the upper plastic and the riveted aluminum block. When the busbar is welded to the riveted aluminum block, the heat is blocked when it is conducted to the heat insulating member through the riveted aluminum block, thereby reducing the heat transfer to the upper plastic, thereby avoiding irreversible melting deformation of the upper plastic and reducing product defects.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] A heat insulating member is provided between the upper plastic and the riveted aluminum block. The heat insulating member is sleeved on the outer periphery of the riveted aluminum block so that the riveted aluminum block is placed in the upper plastic without contacting the surface of the upper plastic. When the busbar is welded to the riveted aluminum block, the heat is blocked when it is conducted to the heat insulating member through the riveted aluminum block, thereby reducing the heat transfer to the upper plastic and avoiding irreversible melting deformation of the upper plastic. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of a high heat-resistance battery cover according to an embodiment of the utility model.

[0028] Figure 2 This is a first exploded view of a high thermal resistance battery cover according to an embodiment of the present invention.

[0029] Figure 3 This is an exploded view of the plastic component of an embodiment of the present invention.

[0030] Figure 4 This is a structural diagram of the bottom oblique angle of a riveted aluminum block according to an embodiment of the utility model.

[0031] Figure 5 for Figure 1 Medium AA perspective section view.

[0032] Figure 6 This is a structural diagram of the upper plastic bottom from an oblique perspective of an embodiment of the present invention.

[0033] Figure 7This is a second exploded view of a high thermal resistance battery cover according to an embodiment of the present invention.

[0034] Illustrations: 1-cover body, 2-upper plastic assembly, 3-pole assembly, 11-first positioning portion, 12-second positioning portion, 21-upper plastic, 22-thermal insulation, 23-riveted aluminum block, 24-step groove, 31-sealing ring, 32-connecting column, 33-bottom plate, 111-groove, 121-positioning block, 122-first through hole, 211-boss, 212-second through hole, 213-step groove, 221-vertical portion, 222-horizontal portion, 241-first groove wall, 242-second groove wall. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0036] like Figures 1 to 7 As shown, this embodiment provides a high heat resistance battery cover, including a cover body 1, an upper plastic component 2, and a pole component 3, the upper plastic component 2 is installed on the top of the cover body 1, and the pole component 3 passes through the cover body 1 and is connected to the upper plastic component 2, characterized in that the upper plastic component 2 includes an upper plastic 21, a heat insulating member 22 and a riveted aluminum block 23, and the heat insulating member 22 is sleeved on the outer periphery of the riveted aluminum block 23 and is clamped between the riveted aluminum block 23 and the upper plastic 21.

[0037] A heat insulating member 22 is provided between the upper plastic 21 and the riveted aluminum block 23. The heat insulating member 22 is sleeved on the outer periphery of the riveted aluminum block 23 so that the riveted aluminum block 23 is placed in the upper plastic 21 without contacting the surface of the upper plastic 21. When the busbar is welded to the riveted aluminum block 23, the heat is blocked when it is conducted to the heat insulating member 22 through the riveted aluminum block 23, thereby reducing the heat transfer to the upper plastic 21, thereby avoiding irreversible melting deformation of the upper plastic 21.

[0038] like Figures 3 to 5As shown, the outer circumference of the riveted aluminum block 23 is recessed inward to form a stepped groove 24, and the stepped groove 24 includes a first groove wall 241 extending in the vertical direction and a second groove wall 242 extending in the horizontal direction. The heat insulating member 22 includes a vertical portion 221 and a horizontal portion 222, and the vertical portion 221 and the horizontal portion 222 are respectively against the first groove wall 241 and the second groove wall 242. The heat insulating member 22 is sleeved on the riveted aluminum block 23, and is tightly fitted with the first groove wall 241 and the second groove wall 242, so that the side and bottom surfaces of the riveted aluminum block 23 are wrapped in the heat insulating member 22, thereby effectively blocking the conduction of heat. The surface of the vertical portion 221 away from the first groove wall 241 is flush with the circumferential surface of the riveted aluminum block 23, and the surface of the horizontal portion 222 away from the second groove wall 242 is flush with the bottom surface of the riveted aluminum block 23. The surface of the heat insulating member 22 is flush with the surface of the riveted aluminum block 23, and the end face of the heat insulating member 22 abuts against the end face of the stepped groove 24 of the riveted aluminum block 23. After the heat insulating member 22 is sleeved on the riveted aluminum block 23, it is similar to a whole, and the combination of the two is more stable. After the heat insulating member 22 is sleeved on the riveted aluminum block 23, it is installed in the upper plastic 21, and the top surface of the upper plastic 21 is lower than the top surface of the heat insulating member 22, thereby ensuring that the upper plastic 21 and the riveted aluminum block 23 do not contact.

[0039] like Figure 2 As shown, the cover body 1 is provided with a first positioning portion 11, the upper plastic 21 is placed in the first positioning portion 11, a boss 211 is provided at the bottom of the upper plastic 21, the first positioning portion 11 is provided with a groove 111, and the boss 21 is engaged with the groove 111. After the upper plastic 21, the heat insulating member 22 and the riveted aluminum block 23 are assembled and assembled, they are installed on the first mounting portion 11 at the top of the cover body 1, and are positioned by the engaging structure formed by the groove 111 and the boss 211, ensuring that the upper plastic component 2 will not move or twist after installation.

[0040] like Figure 2 , Figures 5 to 7As shown, the pole assembly 3 includes a sealing ring 31, a connecting column 32 and a bottom plate 33, and the sealing ring 31 is sleeved on the connecting column 32. The cover body 1 is provided with a second positioning portion 12, and the pole assembly 3 is placed in the second positioning portion 12. Two positioning blocks 121 are provided at the edge of the second positioning portion 12, and the positioning blocks 121 are engaged with the side of the bottom plate 33. The second positioning portion 12 is provided with a first through hole 122, and the upper plastic 21 is provided with a second through hole 212. The connecting column 32 passes through the first through hole 122 and the second through hole 212 and extends into the upper plastic assembly 2. The second through hole 212 is provided with a step groove 213, and the top of the sealing ring 31 abuts against the step groove 213. The pole assembly 3 passes through the cover body 1 and is riveted to the upper plastic assembly 2. The bottom plate 33 is welded to the battery cell tab, and the sealing ring 31 ensures the sealing of the pole assembly 3 and the upper plastic assembly 2 after riveting. The pole assembly 3 is mounted on the second mounting portion 12 of the cover body 1, and the positioning block 121 on the edge of the second mounting portion 12 is engaged with the bottom plate 33 of the pole assembly 3, ensuring that the pole assembly 3 will not move during riveting. After the upper plastic assembly 2 is mounted on the first positioning portion 11, the first through hole 122 and the second through hole 212 are interlinked, and the connecting column 32 passes through the first through hole 122 and the second through hole 212 and is riveted to the upper plastic assembly 2, thereby connecting the upper plastic assembly 2, the cover body 1 and the pole assembly 3 into a whole. The sealing ring 31 passes through the first through hole 122, and its top is tightly against the step groove 213 of the second through hole 122, thereby ensuring the airtightness of the cover after riveting.

[0041] A battery of the utility model includes a high heat resistance battery cover plate. A heat insulator 22 is provided between the upper plastic 21 and the riveted aluminum block 23. When the busbar is welded to the riveted aluminum block 23, the heat is blocked when it is conducted to the heat insulator 22 through the riveted aluminum block 23, thereby reducing the heat transfer to the upper plastic 21, thereby avoiding irreversible melting deformation of the upper plastic 21 and reducing battery defects.

[0042] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the definition of "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high heat resistance battery cover, comprising a cover body, an upper plastic component, and a pole component, wherein the upper plastic component is mounted on the top of the cover body, and the pole component passes through the cover body and is connected to the upper plastic component, characterized in that: The upper plastic assembly comprises an upper plastic, a heat insulating member and a riveted aluminum block. The heat insulating member is sleeved on the outer circumference of the riveted aluminum block and is sandwiched between the riveted aluminum block and the upper plastic.

2. The high heat resistance battery cover plate according to claim 1, characterized in that: The outer circumference of the riveted aluminum block is recessed inward to form a stepped groove, which includes a first groove wall extending in a vertical direction and a second groove wall extending in a horizontal direction. The thermal insulation component includes a vertical portion and a horizontal portion, and the vertical portion and the horizontal portion are respectively against the first groove wall and the second groove wall.

3. The high heat resistance battery cover plate according to claim 2, characterized in that: The surface of the vertical portion facing away from the first groove wall is flush with the circumferential surface of the riveted aluminum block, and the surface of the horizontal portion facing away from the second groove wall is flush with the bottom surface of the riveted aluminum block.

4. The high heat resistance battery cover plate according to claim 3, characterized in that: The upper plastic sleeve is arranged on the outer side of the heat insulating member.

5. The high heat resistance battery cover plate according to claim 4, characterized in that: The cover body is provided with a first positioning portion, the upper plastic is placed in the first positioning portion, a boss is provided at the bottom of the upper plastic, the first positioning portion is provided with a groove, and the boss is engaged with the groove.

6. The high heat resistance battery cover plate according to claim 1, characterized in that: The pole assembly comprises a sealing ring, a bottom plate and a connecting column, and the sealing ring is sleeved on the connecting column.

7. The high heat resistance battery cover plate according to claim 6, characterized in that: The cover plate body is provided with a second positioning portion, the pole assembly is placed in the second positioning portion, a positioning block is provided on the edge of the second positioning portion, and the positioning block is engaged with the side surface of the bottom plate.

8. The high heat resistance battery cover plate according to claim 7, characterized in that: The second positioning portion is provided with a first through hole, the upper plastic is provided with a second through hole, and the connecting column passes through the first through hole and the second through hole and extends into the upper plastic component.

9. The high heat resistance battery cover plate according to claim 8, characterized in that: The second through hole is provided with a step groove, and the top of the sealing ring abuts against the step groove.

10. A battery, characterized in that: A high thermal resistance battery cover plate comprising any one of claims 1 to 9.

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