Battery Pole Sealing Structure for Thermal Expansion Relief
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Solution Overview
Problem
The expansion of the pole in a battery during operation causes the pole to squeeze the sealing component and other components, leading to insulation failure and stability issues.
Innovation Solution
A battery design that includes a housing, a pole with a connecting and limiting part, and a sealing component with a first and second sealing part. The second sealing part is interference-fitted with the housing's through hole, and the first sealing part has a recess to accommodate deformation, relieving pressure on other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the pole expands due to temperature increase, then the sealing component is squeezed, but this causes insulation failure and stability issues
Solution Approach 1:
The recess is pre-formed in the first sealing part to provide deformation space before thermal expansion occurs. When the pole expands due to temperature increase, the first sealing part can deform into the recess, cushioning the expansion force and preventing insulation failure. This prior cushioning structure resolves the contradiction by accommodating thermal expansion while maintaining insulation stability.
2Reliability
If the first sealing part is made rigid to maintain sealing, then sealing effectiveness improves, but the pole expansion squeezes other components causing insulation failure
Solution Approach 1:
The first sealing part has different local properties: the main body maintains rigidity for effective sealing, while the recess provides a localized soft/deformable region. This local quality differentiation allows the sealing part to maintain sealing effectiveness while accommodating pole expansion without transmitting excessive compression to other components, thus resolving the contradiction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively relieves compression on the sealing component, preventing insulation failure and improving the overall stability of the battery by allowing for deformation without directly squeezing other components.
Implementation Method 1
the second sealing part is interference-fitted with an inner sidewall of the first through hole
Implementation Method 2
as an internal temperature of the battery increases during operation, the pole tends to expand
Implementation Method 3
the recess is configured to provide a deformation space when the first sealing part is squeezed
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present disclosure provides a battery (100), including a housing (10), a pole (20), and a sealing component (30). The housing includes an end plate (12) provided with a first through hole (101) and a lateral wall (11). The pole includes a pole connecting part (21) passing through the first through hole and a pole limiting part (23) provided on the pole connecting part and located on a side of the end plate close to the lateral wall. The sealing component includes a first and second sealing parts. The first sealing part (31) is arranged around the pole connecting part and located between the pole limiting part and the end plate. The second sealing part (32) is connected to the first sealing part, arranged around the pole connecting part, and interference-fitted with the first through hole. The first sealing part is provided with a recess configured to provide a deformation space when the first sealing part is squeezed.