Battery cover plate structure and battery

Abstract

This utility model relates to the field of battery technology and, in particular, to a battery cover plate structure and a battery. A battery cover plate structure comprises: a base plate with a through hole for a terminal, a protruding flange portion on the outer side of a portion of the terminal located above the base plate; and a temperature-resistant sealing element positioned around one lateral side of the terminal and located between a lower end of the flange portion and an upper surface of the base plate. This utility model ensures that the sealing performance of the battery cover plate is not affected by welding heat or the thermal effects of rapid charging, thus meeting the sealing requirements for rapid battery charging. Figure for the abstract: Fig. 1

Description

Title of the invention: Battery cover plate structure and battery technical field

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

[0002] BACKGROUND

[0003] With the continued development of electric vehicles, people are becoming increasingly demanding. They expect not only electric vehicles to have a range of over 700 km, but also that electric vehicles charged for 10 minutes will be able to travel over 400 km. This poses new challenges for the design and manufacturing process of the structural components of conventional batteries.

[0004] The increased requirements for rapid battery charging mean that more heat is generated inside the batteries, and the current-carrying capacity of the battery's structural elements must meet these requirements. Furthermore, to meet the current-carrying capacity requirements in a battery manufacturing process, larger weld seam areas are necessary. The larger the weld area, the more heat the battery manufacturing process generates. When the amount of heat exceeds a certain limit, the plastic components can melt, and this melting can result in inadequate battery sealing, potentially leading to leaks and, in severe cases, fires.

[0005] SUMMARY

[0006] One object of the present utility model is to propose a battery cover plate structure, in order to solve the aforementioned technical problem; and

[0007] another object of the present utility model is to propose a battery, in order to solve the aforementioned technical problem.

[0008] The technical problem to be solved by the present utility model can be solved by the following technical solutions:

[0009] A battery cover plate structure, comprising:

[0010] a base plate, provided with a through hole to allow the passage of a terminal, a protruding collar portion being provided on an external side of the portion of the terminal located above the base plate; and

[0011] a temperature-resistant sealing element, placed around a lateral side of the terminal and located between a lower end of the collar part and an upper surface of the base plate.

[0012] In one embodiment, the temperature-resistant sealing element comprises a steel ring and a temperature-resistant layer covering an external side of the steel ring.

[0013] In one embodiment, the temperature-resistant layer is a ceramic layer or an epoxy coating.

[0014] In one embodiment, a stop is provided in a space between the terminal and a wall of the through hole.

[0015] In one embodiment, an insulating piece flush with the underside of the terminal is provided under the base plate.

[0016] In one embodiment, a connecting piece is provided at the lower ends of the terminal and the insulating piece, a lower end of the connecting piece is provided with an electrode tab, and the terminal is electrically connected to the electrode tab by the connecting piece.

[0017] In one embodiment, a protruding lower collar portion is provided on a lower part of an external side of a portion of the terminal under the base plate, and a sealing ring is provided between an upper surface of the lower collar portion and a lower surface of the base plate.

[0018] In one embodiment, the through hole includes a first through hole to allow the passage of a positive electrode terminal and a second through hole to allow the passage of a negative electrode terminal.

[0019] A battery, in which the battery is provided with the battery cover plate structure described.

[0020] In one embodiment, an external side of a battery case is covered with an insulating film, and at least a portion of each of the left and right sides of the case is exposed to the outside.

[0021] The beneficial effects of the present utility model are as follows: thanks to the technical solutions described, in the present utility model, the prior art poly(phenylene sulfide) (PPS) plastic parts are replaced by the heat-resistant sealing element which is riveted between the lower end of the collar part and the upper surface of the base plate, which ensures that the sealing performance of the battery cover plate is not affected by the heat of welding and the thermal effects of fast charging, thus meeting the sealing requirements during the fast charging of a battery. Brief description of the drawings

[0022] The [Fig. 1] is a cross-sectional view of the battery cover plate structure, according to embodiments of the present utility model;

[0023] The [Fig.2] is a schematic diagram of an external structure of a battery according to the embodiments of the present utility model.

[0024] In the drawings: 1. base plate; 2. terminal; 3. flange part; 4. temperature-resistant sealing element; 4L steel ring; 42. temperature-resistant layer; 5. stop; 6. insulating piece; 7. connecting piece; 8. electrode tab; 9. lower flange part; 10. sealing ring; 11. housing; 12. insulating film.

[0025] DETAILED DESCRIPTION OF THE EMBODIMENT METHODS

[0026] The technical solutions in the embodiments of this utility model shall be clearly and completely described with reference to the drawings in the embodiments of this utility model. The embodiments described are only some of the embodiments of this utility model. All other embodiments derived by a person skilled in the art from the embodiments of this utility model, without creative effort, fall within the scope of protection of this utility model.

[0027] It should be noted that, without conflict, the embodiments and the characteristics of the embodiments of the present utility model can be combined.

[0028] The present utility model will be described in more detail below in light of the accompanying drawings and specific embodiments, but this is not intended to limit the present utility model.

[0029] A battery cover plate structure, as shown in [Fig. 1], comprising:

[0030] a base plate 1, provided with a through hole to allow the passage of a terminal 2, a protruding flanged portion 3 being provided on an external side of the portion of the terminal 2 located above the base plate 1; and

[0031] a temperature-resistant sealing element 4, placed around a lateral side of the terminal 2 and located between a lower end of the collar part 3 and an upper surface of the base plate 1.

[0032] More specifically, the present utility model proposes a sealing structure for a battery cell cover plate. The temperature-resistant sealing element 4 is riveted between the lower end of the flange portion 3 and the upper surface of the base plate 1, thus replacing the prior art poly(phenylene sulfide) (PPS) plastic parts; and the temperature-resistant sealing element 4 has higher rigidity and heat resistance than the plastic parts, thereby ensuring that the sealing performance of the battery cover plate is not affected by the The heat from welding and the heat from rapid charging meet the sealing requirements during battery rapid charging. The current utility model resolves the contradiction between sealing and heat generation, features a simple structure and low cost, and is easy to market.

[0033] In one embodiment, the temperature-resistant sealing element 4 comprises a steel ring 41 and a temperature-resistant layer 42 covering an external side of the steel ring 41.

[0034] More specifically, in the present utility model, the temperature-resistant sealing element 4 is used to replace a plastic part; and a structure consisting of the steel ring 41 and the temperature-resistant layer 42 and having higher rigidity and heat resistance is used, such that the heat generated during welding or rapid loading and applied to the temperature-resistant sealing element 4 does not cause the collapse and deformation of the structure, thus ensuring sealing.

[0035] In one embodiment, the temperature-resistant layer 42 is a ceramic layer or an epoxy coating.

[0036] More specifically, in the present utility model, the thickness of the temperature-resistant layer 42 is between 0.15 mm and 0.2 mm, which ensures that the insulation performance meets the requirements.

[0037] In one embodiment, a stop 5 is provided in a space between the terminal 2 and the wall of the through hole.

[0038] More specifically, the stop 5 is mounted in the space between the base plate 1 and the terminal 2 to prevent the terminal 2 from moving left and right.

[0039] In one embodiment, an insulating piece 6 flush with the underside of the terminal 2 is provided under the base plate 1.

[0040] More specifically, a connecting piece 7 is provided at the lower ends of the terminal 2 and the insulating piece 6, and the rear face of the terminal 2 and the connecting piece 7 are in close contact with each other without any stepped structure between them, which ensures better contact, and therefore better heat dissipation and better current carrying capacity.

[0041] In one embodiment, a connecting piece 7 is provided at the lower end of the terminal 2 and the insulating piece 6, a lower end of the connecting piece 7 is provided with an electrode tab 8, and the terminal 2 is electrically connected to the electrode tab 8 by the connecting piece 7.

[0042] More specifically, the present utility model provides a current-carrying structure for the battery cover plate. The current-carrying structure includes the electrode tab 8, the connecting piece 7, the terminal 2, and the weld beads for connecting them. In the present utility model, the terminal 2 It has a large diameter of 20 mm or more, which ensures the structural elements' ability to carry current. When terminal 2 and connecting piece 7 need to be welded, the welding area can be defined based on practical requirements for fast charging. In this utility model, a large amount of welding heat would be generated during welding, but the heat applied to the high-temperature resistant sealing element 4 does not cause the structure to collapse or deform, thus ensuring a watertight seal.

[0043] In one embodiment, a protruding lower collar portion 9 is provided on a lower part of an external side of a portion of the terminal 2 under the base plate 1, and a sealing ring 10 is provided between an upper surface of the lower collar portion 9 and a lower surface of the base plate 1.

[0044] More specifically, in the present utility model, the sealing structure of the cover plate comprises the terminal 2, the sealing ring 10, the base plate 1, the temperature-resistant sealing element 4 and the stop 5. The overall seal is achieved by pressure riveting the head of the terminal 2 to form a sealing ring.

[0045] In the present utility model, the sealing ring 10 is mounted from the top of the terminal 2 to the base of the terminal. The terminal is then mounted in a position designated by a clamping device, ensuring that the compression of the sealing ring 10 is 20 to 40%. Next, the stop 5 is mounted in the space between the base plate 1 and the terminal 2, ensuring that the terminal 2 does not move left or right. Then, the steel ring 41, onto which the temperature-resistant coating 42 has been spray-painted, is mounted. Finally, the terminal 2 is riveted using a pressure riveting machine, forming a flared edge to press against the entire sealing structure.

[0046] In one embodiment, the through hole includes a first through hole to allow the passage of a positive electrode terminal and a second through hole to allow the passage of a negative electrode terminal.

[0047] As shown in [Fig.2], a battery is proposed, the battery is provided with the battery cover plate structure according to any one of the embodiments.

[0048] In one embodiment, an external side of a battery case 11 is covered with an insulating film 12, and at least a portion of each of the left and right sides of the case 11 is exposed to the outside.

[0049] More specifically, in the present utility model, the housing 11 is rectangular, the housing 11 has a front side, a rear side, a left side, a right side, a top side and a bottom side, the external side of the battery housing 11 is to be wrapped with an insulating film 12, but a portion of each of the left sides and right of the housing 11 is not wrapped with the insulating film 12. During the fast charging of a battery, the electrode sheets also generate heat which must be dissipated in time; in the present utility model, a portion of each of the left and right sides of the housing 11 is exposed, so that the surface of the aluminum housing 11 of the battery can be in direct contact with a thermally conductive structural adhesive of the battery block level, which reduces the thermal resistance while ensuring the heat dissipation area, thus greatly increasing the efficiency of heat dissipation and ensuring the efficiency of the fast charging of the battery.

[0050] The embodiments described above are merely preferred embodiments of this utility model, but are not intended to limit the embodiments and the scope of protection of this utility model. A person skilled in the art should know that all solutions obtained by equivalent replacements and obvious variations made using the description and drawings of this utility model must be included within the scope of protection of this utility model.

Claims

Demands

1. Battery cover plate structure, comprising: a base plate (1), having a through hole to permit passage of a terminal (2), a protruding flange portion (3) being provided on an external side of the portion of the terminal (2) situated above the base plate (1); and a temperature-resistant sealing element (4), placed around a lateral side of the terminal (2) and situated between a lower end of the flange portion (3) and an upper surface of the base plate (1).

2. Battery cover plate structure according to claim 1, wherein the temperature-resistant sealing element (4) comprises a steel ring (41) and a temperature-resistant layer (42) covering an external side of the steel ring (41).

3. Battery cover plate structure according to claim 2, wherein the temperature-resistant layer (42) is a ceramic layer or an epoxy coating.

4. Battery cover plate structure according to claim 1, wherein a stop (5) is provided at a space between the terminal (2) and a wall of the through hole.

5. Battery cover plate structure according to claim 1, wherein an insulating piece (6) flush with the underside of the terminal (2) is provided under the base plate (1).

6. Battery cover plate structure according to claim 5, wherein a connecting piece (7) is provided at the lower ends of the terminal (2) and the insulating piece (6), a lower end of the connecting piece (7) is provided with an electrode tab (8), and the terminal (2) is electrically connected to the electrode tab (8) by the connecting piece (7).

7. Battery cover plate structure according to claim 1, wherein a protruding lower flange portion (9) is provided on a lower portion of an external side of a portion of the terminal (2) under the base plate (1), and a sealing ring (10) is provided between an upper surface of the lower flange portion (9) and a lower surface of the base plate (1).

8. Battery cover plate structure according to claim 1, wherein the through hole has a first through hole to permit the passage of a positive electrode terminal and a second through hole to permit the passage of a negative electrode terminal.

9. Battery, wherein the battery is provided with the battery cover plate structure according to any one of claims 1 to 8.

10. Battery according to claim 9, wherein an external side of a battery case (11) is covered with an insulating film (12), and at least a portion of each of the left and right sides of the case (11) is exposed to the outside.

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