Battery cover plate convenient to assemble and detect

Abstract

The utility model discloses a battery cover plate convenient to assemble and detect, which comprises a base provided with a pole mounting hole, a pole insulating ring, a pole body and a pole welding ring, and at least one section of closed sealing surface is arranged between the outer peripheral surface of the pole body and the inner peripheral surface of the pole welding ring. The positions, corresponding to the sealing surface, of the pole body and the pole welding ring are in interference fit, a first air passage is formed between the pole body and the pole welding ring above the sealing surface, a second air passage is formed between the pole body and the pole insulating ring, and the second air passage is communicated to the upper end surfaces of the pole body and the pole insulating ring; the first air channel is communicated with the second air channel. The post body and the lower end of the post welding ring are in interference fit to realize primary sealing and fixing, final sealing and fixing are completed through welding, meanwhile, it is ensured that a through air channel is certainly formed above a sealing surface, and the situation that temporary sealing detection is qualified due to unstable sealing above the sealing surface is eliminated.

Description

Technical Field

[0001] The utility model belongs to the field of machining, and particularly relates to a battery cover plate which is convenient for assembly and detection. Background Art

[0002] Existing battery cover plates which are convenient for assembly and detection are all composed of a base and a pole installation assembly. For the connection strength of the pole installation assembly and the air tightness of the pole installation assembly, there are relatively high requirements. Therefore, after the production and assembly are completed, it is necessary to detect the air tightness at the pole installation assembly. Existing battery cover plates are hermetically fixed and connected by means of pressing and welding. There is an unstable sealing surface formed after pressing, and there are also fine gaps on the weld. During the factory inspection, the detection result may be qualified due to the unstable sealing surface formed after pressing. However, due to the bumps during long-distance transportation or collisions for other reasons, the unstable sealing surface will no longer be sealed, resulting in leakage of the battery cover plate during the working state. Therefore, how to ensure the reliability of the air tightness detection before leaving the factory is an urgent problem to be solved at present. Summary of the Invention

[0003] The purpose of the utility model is to provide a battery cover plate which is convenient for assembly and detection, and eliminates the leakage detection interference caused by unstable sealing by setting an air passage.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: A battery cover plate which is convenient for assembly and detection, comprising:

[0005] A base, on which there are a plurality of pole installation holes;

[0006] A pole installation assembly, which includes a pole insulating ring arranged in the pole installation hole, a pole body passing through the pole insulating ring, and a pole welding ring sleeved on the pole body and located in the pole installation hole. The pole welding ring is located below the pole insulating ring;

[0007] There is at least one closed sealing surface between the outer peripheral surface of the pole body and the inner peripheral surface of the pole welding ring. The positions of the pole body and the pole welding ring corresponding to the sealing surface are in interference fit. A first air passage is formed between the pole body and the pole welding ring above the sealing surface, and a second air passage is formed between the pole body and the pole insulating ring. The second air passage communicates with the upper end surfaces of the pole body and the pole insulating ring. The first air passage and the second air passage communicate. During the leakage detection, it can ensure that a through air passage is surely formed above the sealing surface, eliminating the situation that the temporary sealing detection is qualified due to the unstable sealing above the sealing surface, and ensuring that the cover plate is no longer sealed after the condition of the temporary sealing qualification disappears.

[0008] In another embodiment, the pole column body includes a lower pole column, a middle pole column, and an upper pole column with diameters increasing sequentially from bottom to top. The outer peripheral surface of the lower pole column is the first outer peripheral surface, the outer peripheral surface of the middle pole column is the second outer peripheral surface, and the outer peripheral surface of the upper pole column is the third outer peripheral surface. The inner side surface of the pole column welding ring opposite to the lower pole column is the first inner side surface, the side surface of the pole column insulating ring opposite to the outer peripheral surface of the middle pole column is the second inner side surface, and the side surface of the pole column insulating ring opposite to the outer peripheral surface of the upper pole column is the third inner side surface. The transition plane between the second inner side surface and the third inner side surface is the middle end surface of the insulating ring. The first air passage is formed on the first inner side surface and the upper end surface of the pole column welding ring, and the second air passage is formed on the second inner side surface, the middle end surface of the insulating ring, and the third inner side surface.

[0009] In another embodiment, there are several first air passages and second air passages respectively.

[0010] In another embodiment, the first air passages are evenly distributed on the pole column welding ring.

[0011] In another embodiment, the second air passages are evenly distributed on the pole column insulating ring.

[0012] In another embodiment, the sealing surface is formed at the lower end of the inner side surface of the pole column welding ring. The inner side surface of the pole column welding ring above the sealing surface is in an inverted cone shape, with its inner diameter decreasing from top to bottom, and at least part of the inner diameter is larger than the outer diameter of the corresponding position on the pole column body.

[0013] In another embodiment, several protrusions are provided at intervals on the inner side surface of the pole column welding ring corresponding to the sealing surface.

[0014] The beneficial effects of the present utility model are as follows: The present utility model realizes preliminary sealing and fixation through the interference fit between the pole column body and the lower end of the pole column welding ring, and completes the final sealing and fixation through welding. At the same time, it ensures that a through air passage is surely formed above the sealing surface, eliminating the situation where the temporary sealing test is qualified due to unstable sealing above the sealing surface, and ensuring that the cover plate is no longer sealed after the conditions for temporary sealing qualification disappear, greatly improving the reliability of airtightness detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front view of the present utility model;

[0016] Figure 2 is Figure 1 the sectional view A-A of

[0017] Figure 3 is Figure 2 the partial view at B in

[0018] Figure 4 This is the exploded view of the present utility model;

[0019] Figure 5 is Figure 4 the partial view at position C in

[0020] Figure 6 the structural schematic diagram of the terminal post welding ring. Specific embodiments

[0021] The following further describes the present utility model in conjunction with the accompanying drawings.

[0022] As Figure 1-2 shown, the battery cover plate facilitating assembly and detection includes: a base 2 and a terminal post mounting assembly 1.

[0023] Specifically, a plurality of terminal post mounting holes 21 are provided on the base 2; the terminal post mounting assembly 1 includes a terminal post insulating ring 11 disposed in the terminal post mounting hole 21, a terminal post body 12 passing through the terminal post insulating ring 11, and a terminal post welding ring 13 sleeved on the terminal post body 12 and located in the terminal post mounting hole 21, and the terminal post welding ring 13 is located below the terminal post insulating ring 11.

[0024] In order to ensure the sealing performance and strength after welding, there is at least a section of closed sealing surface between the outer peripheral surface of the terminal post body 12 and the inner peripheral surface of the terminal post welding ring 13, and the positions on the terminal post body 12 and the terminal post welding ring 13 corresponding to this sealing surface are in interference fit.

[0025] During leak detection, in order to ensure that a through airway must be formed above the sealing surface, eliminate the situation where the temporary seal detection is qualified due to the unstable seal above the sealing surface, and ensure that the cover plate is no longer sealed after the condition for the temporary seal to be qualified disappears; as Figure 3-5 shown, a first airway 31 is formed between the terminal post body 12 and the terminal post welding ring 13 above the sealing surface, and a second airway 32 is formed between the terminal post body 12 and the terminal post insulating ring 11. The second airway 32 communicates with the upper end surfaces of the terminal post body 12 and the terminal post insulating ring 11, and the first airway 31 and the second airway 32 communicate with each other.

[0026] The specific setting modes of the first air passage 31 and the second air passage 32 are as follows: The pole column body 12 includes a lower pole column 121, a middle pole column 122, and an upper pole column 123 with gradually increasing outer diameters from bottom to top. The outer peripheral surface of the lower pole column 121 is the first outer peripheral surface 41, the outer peripheral surface of the middle pole column 122 is the second outer peripheral surface 42, and the outer peripheral surface of the upper pole column 123 is the third outer peripheral surface 43. The inner side surface of the pole column welding ring 13 opposite to the lower pole column 121 is the first inner side surface 51. The side surface of the pole column insulating ring 11 opposite to the outer peripheral surface of the middle pole column 122 is the second inner side surface 52. The side surface of the pole column insulating ring 11 opposite to the outer peripheral surface of the upper pole column 123 is the third inner side surface 53. The transition plane between the second inner side surface 52 and the third inner side surface 53 is the insulating ring middle end surface 54. The first air passage 31 is formed on the first inner side surface 51 and the upper end surface of the pole column welding ring 13. The second air passage 32 is formed on the second inner side surface 52, the insulating ring middle end surface 54, and the third inner side surface 53. There are multiple first air passages 31 and second air passages 32 respectively, and they correspond one by one. The first air passages 31 are evenly distributed on the pole column welding ring 13. The second air passages 32 are evenly distributed on the pole column insulating ring 11. In this embodiment, there are 2 first air passages 31 and 2 second air passages 32 each. As Figure 6 shown, a sealing surface M is formed at the lower end part of the inner side surface of the pole column welding ring 13. The inner side surface of the pole column welding ring 13 above the sealing surface M is a guiding surface N. The guiding surface N is in an inverted cone shape, and its inner diameter decreases from top to bottom. And at least part of the inner diameter of the guiding surface N is larger than the outer diameter of the corresponding position on the pole column body of the sealing surface M.

[0027] The inner diameter at the sealing surface of the pole column mounting hole 21 is D1. When the material of the pole column body 12 is copper, the outer diameter of the lower pole column 121 is D2, and D2 - D1 = 0.04 - 0.2 mm; when the material of the pole column body 12 is aluminum, the outer diameter of the lower pole column 121 is D2, and D2 - D1 = 0.04 - 0.2 mm. To improve the welding effect, a plurality of protrusions 131 extending towards the center of the pole column welding ring 13 are arranged at intervals on the inner side surface of the pole column welding ring 13 corresponding to the sealing surface. The distance that the protrusions 131 extend towards the center of the pole column welding ring 13 is 0.02 - 0.10 mm, making the sealing effect and connection strength of the sealing surface formed by pressing more excellent.

[0028] The above embodiments are only for illustrating the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A battery cover plate facilitating assembly and detection, comprising: A base provided with a plurality of pole post mounting holes thereon; A pole post mounting assembly, which includes a pole post insulating ring disposed in the pole post mounting hole, a pole post body passing through the pole post insulating ring, and a pole post welding ring sleeved on the pole post body and located in the pole post mounting hole, and the pole post welding ring is located below the pole post insulating ring; It is characterized in that: there is at least a section of closed sealing surface between the outer peripheral surface of the pole post body and the inner peripheral surface of the pole post welding ring, the positions of the pole post body and the pole post welding ring corresponding to this sealing surface are in interference fit, and a first air passage is formed between the pole post body and the pole post welding ring above the sealing surface, and a second air passage is formed between the pole post body and the pole post insulating ring. The second air passage communicates to the upper end surfaces of the pole post body and the pole post insulating ring, and the first air passage and the second air passage communicate with each other.

2. The battery cover plate facilitating assembly and detection according to claim 1, wherein: The pole post body includes a lower pole post, a middle pole post, and an upper pole post with gradually increasing outer diameters from bottom to top. The outer peripheral surface of the lower pole post is the first outer peripheral surface, the outer peripheral surface of the middle pole post is the second outer peripheral surface, and the outer peripheral surface of the upper pole post is the third outer peripheral surface. The inner side surface of the pole post welding ring opposite to the lower pole post is the first inner side surface, the side surface of the pole post insulating ring opposite to the outer peripheral surface of the middle pole post is the second inner side surface, and the side surface of the pole post insulating ring opposite to the outer peripheral surface of the upper pole post is the third inner side surface. The transition plane between the second inner side surface and the third inner side surface is the middle end surface of the insulating ring. The first air passage is formed on the first inner side surface and the upper end surface of the pole post welding ring, and the second air passage is formed on the second inner side surface, the middle end surface of the insulating ring, and the third inner side surface.

3. The battery cover plate facilitating assembly and detection according to claim 1, wherein: There are a plurality of the first air passages and the second air passages respectively.

4. The battery cover plate facilitating assembly and detection according to claim 3, wherein: The first air passages are evenly distributed on the pole post welding ring.

5. The battery cover plate facilitating assembly and detection according to claim 3, wherein: The second air passages are evenly distributed on the pole post insulating ring.

6. The battery cover plate facilitating assembly and detection according to claim 1, wherein: The sealing surface is formed at the lower end part of the inner side surface of the pole post welding ring. The inner side surface of the pole post welding ring above the sealing surface is in an inverted cone shape, and its inner diameter decreases from top to bottom, and at least part of the inner diameter is larger than the outer diameter of the pole post body at the position corresponding to the sealing surface.

7. The battery cover plate facilitating assembly and detection according to claim 1, wherein: A plurality of protrusions are spacedly arranged on the inner side surface of the pole post welding ring at the position corresponding to the sealing surface.

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