Novel high-compression-ratio battery cell sealing ring

Abstract

The utility model relates to a novel high-compression-ratio battery cell sealing ring which comprises a sealing ring main body and sealing lips symmetrically arranged at two ends of the sealing ring main body, the sealing lips are wave-shaped elastic bulges, the thickness of the sealing ring main body is more than or equal to three times that of the sealing lips, and the elasticity of the sealing ring main body is less than or equal to that of the sealing lips. The upper and lower double-sealing-lip structure is adopted, the sealing effect is achieved by compressing the upper and lower double sealing lips, the excessive extrusion degree of the sealing ring can be reduced due to the extrusion space and the recovery space, the service life of the sealing ring is prolonged, and the upper and lower double sealing lips are more suitable for the structural form with the high compression ratio in the limited space; under the condition that the first sealing lip loses efficacy under the high compression ratio, the second sealing lip can also effectively seal the electrolyte.

Description

Technical Field

[0001] The utility model relates to the field of battery sealing for new energy vehicles, in particular to a new type of high compression ratio cell sealing ring. Background Art

[0002] The sealing ring for new energy vehicles is placed between the terminal post and the cover plate. Its function is to prevent the electrolyte from leaking out between the terminal post and the cover plate. When the sealing ring fails, it will directly affect the performance and normal operation of the battery. The sealing ring is a medium made of sealing material to block the penetration channel between the terminal post and the cover plate. When the sealing ring is subjected to the contact pressure of the mating surface between the terminal post and the cover plate, it will produce elastic deformation and elastic restoring force, reduce the unevenness and roughness of the mating surface of the parts, increase the flow resistance of the medium, and then cut off the penetration channel of the working medium to achieve the sealing effect. Due to the limitations of the cover plate structure, etc., some cover plate structures are relatively compact, and the space between the terminal post and the cover plate is limited, resulting in common sealing rings being thin-walled parts. As a result, the sealing ring is prone to failure under high compression ratio and has insufficient sealing performance. Summary of the Invention

[0003] The purpose of the utility model is to provide a new type of high compression ratio cell sealing ring with extrusion space and recovery space, aiming to solve the problem that the sealing ring between the terminal post and the cover plate is prone to failure under high compression ratio.

[0004] The technical solution adopted by the utility model is: a new type of high compression ratio cell sealing ring, including a sealing ring body, and also including sealing lips symmetrically arranged at both ends of the sealing ring body. The sealing lips are wavy elastic protrusions. The thickness of the sealing ring body ≥ 3 times the thickness of the sealing lips, and the elasticity of the sealing ring body ≤ the elasticity of the sealing lips.

[0005] A further technical solution of the utility model is: the sealing lips are ≥ 2 large arc protrusions that gradually and slowly shrink from the root to the top.

[0006] A further technical solution of the utility model is: the sealing lips are of a serrated structure, and the thickness of the sealing ring body ≥ 8 times the thickness of the sealing lips.

[0007] The beneficial effect of the utility model is: due to adopting the above technical solution, the new type of high compression ratio cell sealing ring of the utility model adopts an upper and lower double sealing lip structure. By compressing the upper and lower double sealing lips, a sealing effect is achieved. Having extrusion space and recovery space can reduce the excessive extrusion degree of the sealing ring and extend the service life of the sealing ring. And in a limited space, the upper and lower double sealing lips are more suitable for the structural form of high compression ratio. In the case where the first sealing lip fails under high compression ratio, the second sealing lip can also effectively seal the electrolyte. Description of the Drawings

[0008] Figure 1It is a schematic structural view of a new type of high compression ratio battery cell sealing ring described in the present utility model;

[0009] Figure 2 It is a schematic assembly structural view of a new type of high compression ratio battery cell sealing ring described in the present utility model. Specific embodiments

[0010] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0011] Embodiment:

[0012] As Figure 1 、 2 shown, a new type of high compression ratio battery cell sealing ring includes a sealing ring main body 11, and also includes sealing lips 12 symmetrically arranged at both ends of the sealing ring main body. The sealing lips are wavy elastic protrusions. The thickness of the sealing ring main body is ≥ 3 times the thickness of the sealing lips, and the elasticity of the sealing ring main body is ≤ the elasticity of the sealing lips. The sealing ring 1 with an upper and lower double sealing lip structure cooperates with the cover plate plane 2 and the pole column plane 3 to play a sealing role. In the case where the first sealing lip fails under high compression ratio, the second sealing lip can also effectively seal the electrolyte.

[0013] Preferably, the sealing lips are ≥ 2 large arc-shaped protrusions that gradually and slowly contract from the root to the top. The protrusions are relatively thick and large, and there is enough squeezing space between the two protrusions. When the protrusions are squeezed, they have good recovery performance and high service life.

[0014] In another preferred solution, the sealing lips are of a serrated structure, and the thickness of the sealing ring main body is ≥ 8 times the thickness of the sealing lips. This relatively fine sealing lip structure will cause the top of the sealing lips to collapse and spread to form multiple disordered sealing doors during use, and the sealing effect is good. However, the service life of the sealing lips is shorter than that of the previous solution. At the same time, a sealing ring main body with a relatively large thickness ratio is required to support and control the bending space of the sealing lips.

[0015] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A new type of high compression ratio battery core sealing ring, characterized by: It includes a sealing ring body and sealing lips symmetrically arranged at both ends of the sealing ring body. The sealing lips are wavy elastic protrusions. The thickness of the sealing ring body is ≥ 3 times the thickness of the sealing lips. The elasticity of the sealing ring body is ≤ the elasticity of the sealing lips.

2. According to claim 1, a new type of high compression ratio battery core sealing ring is characterized in that: The sealing lip is ≥2 large arc-shaped protrusions that gradually and slowly shrink from the root to the top.

3. The novel high compression ratio battery core sealing ring according to claim 1 is characterized in that: The sealing lip is a sawtooth structure, and the thickness of the sealing ring body is ≥8 times the thickness of the sealing lip.

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