Battery cover plate structure and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cover plate structure and a battery, the battery cover plate structure comprises a base plate, the base plate is provided with a through hole for a pole to penetrate out, and the outer side of the part, located above the base plate, of the pole is provided with a protruding flange part; and the temperature-resistant sealing element is annularly arranged on the side edge of the pole and is positioned between the lower end of the flange part and the upper surface of the substrate. According to the battery cover plate, the temperature-resistant sealing element is riveted between the lower end of the flange part and the upper surface of the substrate to replace a polyphenylene sulfide plastic part in the prior art, so that the sealing performance of the battery cover plate can be ensured not to be influenced by welding heat and fast charging heating, and the sealing requirement during fast charging of a battery is met.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a battery cover plate structure and a battery. Background Art

[0002] With the continuous development of electric vehicles, people's requirements for electric vehicles are getting higher and higher. Not only does the electric vehicle need to have a cruising range of more than 700 Km, but it is also required that the electric vehicle can be charged for 10 minutes and have a cruising range of 400 Km or more. This poses new challenges to the design and process of traditional battery structural parts.

[0003] The improvement of the fast charging requirement of the battery means that the heat generated inside the battery will be higher, and the over-current capacity of the battery structural parts needs to meet the requirements. In addition, in order to meet the over-current capacity during the battery manufacturing process, a larger area of welds is correspondingly required. The larger the welding area, the higher the heat generated during the battery manufacturing process. When the heat exceeds the limit value, it may melt the plastic parts. The melting of the plastic parts will lead to insufficient sealing function of the battery, and in severe cases, it may cause battery leakage and fire. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery cover plate structure to solve the above technical problems;

[0005] The purpose of the utility model is also to provide a battery to solve the above technical problems.

[0006] The technical problems solved by the utility model can be realized by adopting the following technical solutions:

[0007] A battery cover plate structure includes:

[0008] A substrate, on which a through hole for a pole column to pass through is provided, and a protruding flange portion is provided on the outer side of the part of the pole column located above the substrate;

[0009] A temperature-resistant seal, which is arranged around the side of the pole column and is located between the lower end of the flange portion and the upper surface of the substrate.

[0010] Preferably, the temperature-resistant seal includes a steel ring and a temperature-resistant layer coated on the outer side of the steel ring.

[0011] Preferably, the temperature-resistant layer is a ceramic layer or an epoxy coating.

[0012] Preferably, a stopper is provided at the gap between the pole column and the hole wall of the through hole.

[0013] Preferably, an insulating sheet flush with the bottom of the pole column is provided below the substrate.

[0014] Preferably, a connecting piece is provided at the lower ends of the pole post and the insulating sheet, a tab is provided at the lower end of the connecting piece, and the pole post is electrically connected to the tab through the connecting piece.

[0015] Preferably, a protruding lower flange portion is provided at the outer bottom of the portion of the pole post located below the substrate, and a sealing ring is provided between the upper surface of the lower flange portion and the lower surface of the substrate.

[0016] Preferably, the through hole includes a first through hole for passing through the positive pole post and a second through hole for passing through the negative pole post.

[0017] A battery is provided with the battery cover structure described above.

[0018] Preferably, an insulating tape is covered on the outer side of the housing of the battery, and at least a part of the side of the housing is exposed to the outside.

[0019] Advantages of the present utility model: Due to the adoption of the above technical solutions, the present utility model uses a temperature-resistant sealant to rivet between the lower end of the flange portion and the upper surface of the substrate, replacing the polyphenylene sulfide (PPS) plastic part in the prior art, so as to ensure that the sealing performance of the battery cover is not affected by the welding heat and the heat generated during fast charging, and meet the sealing requirements during fast charging of the battery. Description of the Drawings

[0020] Figure 1 It is a cross-sectional view of the battery cover structure in the embodiment of the present utility model;

[0021] Figure 2 It is a schematic external structure diagram of the battery in the embodiment of the present utility model.

[0022] In the drawings: 1. Substrate; 2. Pole post; 3. Flange portion; 4. Temperature-resistant sealant; 41. Steel ring; 42. Temperature-resistant layer; 5. Stopper; 6. Insulating sheet; 7. Connecting piece; 8. Tab; 9. Lower flange portion; 10. Sealing ring; 11. Housing; 12. Insulating tape. Detailed Embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0024] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0025] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but it is not intended to limit the present utility model.

[0026] A battery cover structure, as Figure 1 shown, includes

[0027] A substrate 1, on which there is a through hole for the pole 2 to pass through, and a protruding flange portion 3 is provided on the outer side of the portion of the pole 2 located above the substrate 1;

[0028] A heat-resistant seal 4, which is arranged around the side of the pole 2 and is located between the lower end of the flange portion 3 and the upper surface of the substrate 1.

[0029] Specifically, the present utility model provides a sealing structure for the cell cover. The heat-resistant seal 4 is riveted between the lower end of the flange portion 3 and the upper surface of the substrate 1, replacing the polyphenylene sulfide (PPS) plastic part in the prior art. The heat-resistant seal 4 has higher rigidity and heat resistance compared to the plastic part, so that it can ensure that the sealing performance of the battery cover is not affected by the welding heat and the heat generated during fast charging, meeting the sealing requirements during battery fast charging. The present utility model solves the contradiction between sealing and heat generation, has a simple structure, low cost and is easy to promote.

[0030] In a preferred embodiment, the heat-resistant seal 4 includes a steel ring 41 and a heat-resistant layer 42 coated on the outer side of the steel ring 41.

[0031] Specifically, in the present utility model, the heat-resistant seal 4 is used to replace the plastic part, and the structure of the steel ring 41 plus the heat-resistant layer 42 with stronger rigidity and better heat resistance is adopted, so that the heat generated during the welding process or the fast charging process acting on the heat-resistant seal 4 will not cause the collapse and deformation of the structure, thereby ensuring the sealing

[0032] In a preferred embodiment, the heat-resistant layer 42 is a ceramic layer or an epoxy coating.

[0033] Specifically, the thickness of the heat-resistant layer 42 in the present utility model is 0.15 mm to 0.2 mm, ensuring that the insulation performance meets the requirements.

[0034] In a preferred embodiment, a stopper 5 is provided at the gap between the pole 2 and the hole wall of the through hole.

[0035] Specifically, the stopper 5 is installed in the gap between the substrate 1 and the pole 2 to prevent the pole 2 from moving left and right.

[0036] In a preferred embodiment, an insulating sheet 6 flush with the bottom of the pole 2 is provided below the substrate 1.

[0037] Specifically, a connecting piece 7 is provided at the lower ends of the terminal post 2 and the insulating sheet 6. The back surface of the terminal post 2 and the connecting piece 7 are in close contact without a stepped structure, ensuring better contact, thereby guaranteeing better heat dissipation and overcurrent capacity.

[0038] In a preferred embodiment, a connecting piece 7 is provided at the lower ends of the terminal post 2 and the insulating sheet 6. An electrode tab 8 is provided at the lower end of the connecting piece 7. The terminal post 2 is electrically connected to the electrode tab 8 through the connecting piece 7.

[0039] Specifically, the present utility model provides an overcurrent structure for the battery cover plate. The overcurrent structure includes the electrode tab 8, the connecting piece 7, the terminal post 2, and the weld seams connecting them. The terminal post 2 in the present utility model adopts a terminal post 2 with a large diameter of more than 20 mm to ensure the overcurrent capacity of the structural member. When welding the terminal post 2 and the connecting piece 7, the welding area can be set according to the actual fast charging requirements. A large amount of welding heat will be generated during the welding process of the present utility model. The heat acting on the high-temperature resistant temperature-resistant seal 4 will not cause the collapse and deformation of the structure, thereby ensuring the seal.

[0040] In a preferred embodiment, a protruding lower flange portion 9 is provided at the outer bottom of the portion of the terminal post 2 located below the substrate 1. A sealing ring 10 is provided between the upper surface of the lower flange portion 9 and the lower surface of the substrate 1.

[0041] Specifically, the cover plate sealing structure of the present utility model includes the terminal post 2, the sealing ring 10, the substrate 1, the temperature-resistant seal 4, and the stop member 5. The overall seal is formed by press riveting the head of the terminal post 2 to form a sealing ring.

[0042] In the present utility model, the sealing ring 10 is installed on the terminal post 2 to the root, and then installed at the specified position through a fixture to ensure that the compression amount of the sealing ring 10 is between 20% and 40%. Then, the stop member 5 is installed in the gap between the substrate 1 and the terminal post 2 to ensure that the terminal post 2 will not move left and right. Subsequently, the steel ring 41 sprayed with the temperature-resistant layer 42 is installed. Finally, through a press riveting machine, the terminal post 2 is riveted, and the flanging presses the overall sealing structure.

[0043] In a preferred embodiment, the through holes include a first through hole for passing through the positive terminal post and a second through hole for passing through the negative terminal post.

[0044] A battery, as Figure 2 shown, is provided with the battery cover plate structure in any one of the embodiments.

[0045] In a preferred embodiment, an insulating tape 12 is covered on the outside of the housing 11 of the battery, and at least a part of the side of the housing 11 is exposed to the outside.

[0046] Specifically, an insulating tape 12 needs to be wound outside the housing 11 of the battery in the present utility model. However, the insulating tape 12 is not wound in some areas on the side of the housing 11. During the fast charging process of the battery, the electrode plates will also generate heat, which needs to be dissipated in time. In the present utility model, some areas on both sides of the housing 11 are exposed, so that the surface of the aluminum shell housing 11 of the battery can be directly in contact with the thermal conductive structural adhesive at the battery pack level, ensuring the heat dissipation area and reducing the thermal resistance at the same time, thereby greatly improving the heat dissipation efficiency and ensuring the fast charging efficiency of the battery.

[0047] The above are only the preferred embodiments of the present utility model, and do not limit the implementation manners and protection scope of the present utility model accordingly. For those skilled in the art, it should be realized that all the equivalent replacements and obvious changes made by using the description and illustration content of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A battery cover plate structure, characterized in that, including, a substrate (1) provided with a through hole for a pole column (2) to pass through, and a protruding flange portion (3) is provided on the outside of the portion of the pole column (2) above the substrate (1); a heat-resistant seal (4) is provided around the side of the pole column (2) and is located between the lower end of the flange portion (3) and the upper surface of the substrate (1).

2. The battery cover plate structure according to claim 1, wherein, The heat-resistant seal (4) includes a steel ring (41) and a heat-resistant layer (42) coated on the outside of the steel ring (41).

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

4. The battery cover plate structure according to claim 1, wherein, A stopper (5) is provided at the gap between the pole column (2) and the hole wall of the through hole.

5. The battery cover plate structure according to claim 1, characterized in that An insulating sheet (6) flush with the bottom of the pole column (2) is provided below the substrate (1).

6. The battery cover plate structure according to claim 5, characterized in that, A connecting piece (7) is provided at the lower ends of the pole column (2) and the insulating sheet (6), a pole ear (8) is provided at the lower end of the connecting piece (7), and the pole column (2) is electrically connected to the pole ear (8) through the connecting piece (7).

7. The battery cover plate structure according to claim 1, characterized in that, A protruding lower flange portion (9) is provided at the outer bottom of the portion of the pole column (2) below the substrate (1), and a sealing ring (10) is provided between the upper surface of the lower flange portion (9) and the lower surface of the substrate (1).

8. The battery cover plate structure according to claim 1, characterized in that, The through hole includes a first through hole for passing through the positive pole column and a second through hole for passing through the negative pole column.

9. A battery, characterized in that, The battery is provided with the battery cover structure according to any one of claims 1-8.

10. The battery according to claim 9, characterized in that, An insulating tape (12) is covered on the outside of the housing (11) of the battery, and at least a part of the side of the housing (11) is exposed to the outside.

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