Cover plate terminal for battery

Abstract

The utility model discloses a cover plate terminal for a battery. The cover plate terminal comprises a pressing block, an upper plastic block positioned in the pressing block, a pole column penetrating through the upper plastic block, and a sealing ring positioned below the upper plastic block and sleeved outside the pole column. The pressing block is of a hollow structure, the top of the pressing block is provided with a limiting edge folded inwards, the upper plastic block is located at the hollow structure and limited through the limiting edge, the bottom of the pressing block is provided with a notch, and the cover plate is provided with a protruding block corresponding to the notch. According to the scheme, the limiting edge is formed through rolling, and the upper plastic block is wrapped by the pressing block, so that the terminal is modularized and stable in structure. The modularization is suitable for different types of battery cells. After the notch of the pressing block is matched with the protruding block on the cover plate, laser welding is carried out, the welding process is simple, and operation is convenient. The terminal of the scheme is simple in structure, light in weight, low in cost, capable of forming modularization and easy to install.

Description

Technical Field

[0001] The utility model relates to the technical field of cover plate terminals, and more specifically, to a cover plate terminal for a battery. Background Art

[0002] The lithium battery cover plate terminal plays a role in connecting the internal battery cell chemical system and the external module. The common methods are riveting, welding, bolts, etc., which are only applicable to single battery cells. In recent years, the new energy vehicle power battery technology industry has achieved long-term and effective development. However, with the fierce competition in the same industry, the battery cell is undoubtedly the key point for vehicle manufacturers to control costs. In order to optimize and improve the energy density and price cost of the battery cell, the lightweight and adaptable design of the structural parts play a crucial role in the whole battery cell.

[0003] Most of the existing cover plate terminals in the market not only have redundant parts, complicated design and heavy weight, but also poor universality, which will lead to complex processes, unstable structure, low welding yield and unstable airtightness. The long-term cyclic use of the battery cell in the vehicle may cause thermal runaway failure, which has certain risks. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cover plate terminal for a battery to solve the technical problems existing in the above background art.

[0005] The technical solution of the utility model provides a cover plate terminal for a battery, which includes a pressing block, an upper plastic block located inside the pressing block, a pole column penetrating through the upper plastic block, and a sealing ring located below the upper plastic block and sleeved outside the pole column;

[0006] The pressing block is set as a hollow structure, and the top of the pressing block is provided with an inwardly folded limiting edge. The upper plastic block is located at the hollow structure and is limited by the limiting edge. The bottom of the pressing block is provided with a notch, and the cover plate is correspondingly provided with a convex block corresponding to the notch.

[0007] In a preferred embodiment, the bottom of the pressing block is provided with a through hole, the pole column passes through the through hole, and the cover plate is correspondingly provided with a perforation through which the pressing block passes.

[0008] In a preferred embodiment, a convex structure is provided on the sealing ring, and the convex structure is inserted into the through hole.

[0009] In a preferred embodiment, a limiting ring is provided on the pole column, and the limiting ring is in pressing contact with the sealing ring.

[0010] In a preferred embodiment, a lower plastic block and pins located at the bottom of the lower plastic block are provided at the bottom of the cover plate, and the pole column passes through the lower plastic block and is connected to the pins.

[0011] In a preferred embodiment, an explosion-proof valve and an explosion-proof valve film are provided in the middle of the cover plate, with the explosion-proof valve film located above the explosion-proof valve.

[0012] The beneficial effects of the technical solution of the present utility model are as follows:

[0013] In this solution, a limiting edge is formed by rolling, and the pressing block wraps the upper plastic block, enabling the terminals to be modularized with stable structure. The modularization can be applied to different models of battery cells. After the notch of the pressing block cooperates with the convex block on the cover plate, laser welding is carried out, and the welding process is simple and easy to operate. The terminal structure of this solution is simple, light in weight, low in cost, can be modularized, and is easy to install. Description of the Drawings

[0014] Figure 1 It is an assembly drawing of the present utility model and the cover plate.

[0015] Figure 2 It is an exploded view of the structure of the present utility model.

[0016] Figure 3 It is an exploded view of the structure of the present utility model from another perspective.

[0017] Explanation of the reference numerals in the drawings: 1 pressing block, 11 limiting edge, 12 through hole, 13 notch, 2 upper plastic block, 3 pole column, 31 limiting ring, 4 sealing ring, 41 convex structure, 5 cover plate, 51 perforation, 52 convex block, 6 lower plastic block, 7 pin, 8 explosion-proof valve, 9 explosion-proof valve film. Detailed Description of the Embodiment

[0018] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments. The embodiments of the present utility model are given for the convenience of illustration and description, and are not intended to be exhaustive or to limit the present utility model to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present utility model, and enable those of ordinary skill in the art to understand the present utility model and thus design various embodiments with various modifications suitable for specific purposes.

[0019] As Figures 1-3 shown, the technical solution of the present utility model provides a terminal for a battery cover plate 5, including a pressing block 1, an upper plastic block 2 located inside the pressing block 1, a pole column 3 penetrating through the upper plastic block 2, and a sealing ring 4 located below the upper plastic block 2 and sleeved outside the pole column 3. The pressing block 1 is located outside the upper plastic block 2 and functions as a weak conductor or insulator. The upper plastic block 2 is inside the pressing block 1 and functions to weld with the external module. The sealing ring 4 is below the upper plastic block 2 and functions to seal the terminal. The pole column 3 functions to conduct current, and the top cover sheet functions to seal the entire battery cell.

[0020] The pressing block 1 is provided with a hollow structure, and a limiting edge 11 that is folded inward is provided at the top of the pressing block 1. The upper plastic block 2 is located at the hollow structure and is limited by the limiting edge 11. A notch 13 is provided at the bottom of the pressing block 1, and a convex block 52 corresponding to the notch 13 is provided on the cover plate 5. In this solution, the limiting edge 11 is formed by rolling, and the pressing block 1 wraps the upper plastic block 2 to modularize the terminal, with stable structure. The modularization can be applied to different models of battery cells. After the notch 13 of the pressing block 1 is matched with the convex block 52 on the cover plate 5, laser welding is performed, and the welding process is simple and easy to operate. The terminal structure of this solution is simple, light in weight, low in cost, can be modularized, and is easy to install.

[0021] A through hole 12 is provided at the bottom of the pressing block 1, and the pole column 3 is arranged through the through hole 12. A through hole 51 through which the pressing block 1 passes is correspondingly provided on the cover plate 5. The pressing block 1 and the cover plate 5 are fixedly welded, and the through hole 51 realizes the positioning of the pressing block 1.

[0022] A convex structure 41 is provided on the sealing ring 4, and the convex structure 41 is inserted into the through hole 12 to play a role in sealing the terminal. A limiting ring 31 is provided on the pole column 3, and the limiting ring 31 is in pressing contact with the sealing ring 4, making the whole terminal structure compact.

[0023] A lower plastic block 6 and pins 7 located at the bottom of the lower plastic block 6 are provided at the bottom of the cover plate 5. The pole column 3 passes through the lower plastic block 6 and is connected to the pins 7. The lower plastic block 6 is below the cover plate 5 and plays a role in stopping and insulating the cover plate 5 from the winding core. The pins 7 are below the lower plastic block 6 and are laser welded to the pole column 3 to play a role in connecting the pole ear of the winding core.

[0024] An explosion-proof valve 8 and an explosion-proof valve film 9 located above the explosion-proof valve 8 are provided in the middle of the cover plate 5. The explosion-proof valve film 9 prevents dust or foreign objects from falling on the surface of the explosion-proof valve 8, and the explosion-proof valve 8 is laser welded to the cover plate 5.

[0025] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A cover terminal for a battery, characterized in that: It includes a pressing block, an upper plastic block located inside the pressing block, a pole column penetrating through the upper plastic block, and a sealing ring located below the upper plastic block and sleeved outside the pole column. The pressing block is arranged as a hollow structure, and the top of the pressing block is provided with an inward-folded limiting edge. The upper plastic block is located at the hollow structure and is limited by the limiting edge. The bottom of the pressing block is provided with a notch, and the cover plate is correspondingly provided with a convex block corresponding to the notch.

2. The cover terminal for a battery according to claim 1, wherein: The bottom of the pressing block is provided with a through hole, the pole column passes through the through hole, and the cover plate is correspondingly provided with a perforation through which the pressing block passes.

3. A cover terminal for a battery according to claim 1, characterized in that: A raised structure is arranged on the sealing ring, and the raised structure is inserted into the through hole.

4. A cover terminal for a battery according to claim 2, characterized in that: A limiting ring is arranged on the pole column, and the limiting ring is in pressing contact with the sealing ring.

5. The cover terminal for a battery according to claim 1, characterized in that: The bottom of the cover plate is provided with a lower plastic block and pins located at the bottom of the lower plastic block. The pole column passes through the lower plastic block and is connected to the pins.

6. The cover terminal for a battery according to claim 1, characterized in that: An explosion-proof valve and an explosion-proof valve film are arranged in the middle of the cover plate, and the explosion-proof valve film is located above the explosion-proof valve.

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