Button Battery Housing With Integrated Insulating Cover Sealing
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Solution Overview
Problem
Existing button battery housing manufacturing processes face inefficiencies due to the difficulty in arranging insulating films, leading to reduced machining efficiency and sealing performance.
Innovation Solution
A battery housing design featuring a cup-shaped bottom shell and a cover with a three-layer structure, including an outer contact layer, an insulating layer, and an inner contact layer, where the insulating layer is bonded using an insulating anti-electrolyte corrosion material to enhance sealing and prevent water ingress, eliminating the need for a physical insulating film during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insulating film is provided between the positive housing and negative housing to achieve insulation, then short circuit prevention is improved, but the machining process becomes more difficult and efficiency decreases
Solution Approach 1:
The insulating film is integrated into the housing structure itself, merging the insulating function with the housing components. The positive housing and negative housing are designed with insulating features built-in, eliminating the need for separate insulating films and simplifying the assembly process while maintaining insulation reliability.
Solution Approach 2:
The insulating function is extracted from a separate component (insulating film) and incorporated directly into the housing design. By integrating insulation features into the housing structure, the patent removes the need for additional insulating components and their associated assembly steps, thereby improving machining efficiency while maintaining short circuit prevention.
2Reliability
If traditional welding and insulating film arrangement are used, then insulation is achieved, but the process complexity and difficulty increase
Solution Approach 1:
The insulating function is merged with the housing structure, combining what were previously separate functions (housing + insulating film) into an integrated design. This reduces the number of components and simplifies the overall process while maintaining reliable insulation between the positive and negative housings.
3Reliability
If insulating film is arranged during machining, then insulation is provided, but time consumption increases and efficiency decreases
Solution Approach 1:
The insulating features are built into the housing structure during the initial manufacturing process, rather than being added as a separate step during assembly. This preliminary integration of insulation into the housing design eliminates the need for time-consuming insulating film arrangement during the machining and assembly process, thereby reducing time consumption while maintaining insulation reliability.
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
This design simplifies the packaging process, improves sealing performance, and extends the battery's service life by preventing electrode short-circuiting and reducing electrolyte corrosion, while maintaining structural stability and firmness.
Implementation Method 1
The insulating bonding portion is configured to be seamlessly bonded to the conductive bonding portion and the welding bonding portion by melting an insulating anti-electrolyte corrosion material at >=100° C.
Implementation Method 2
The insulating anti-electrolyte corrosion material has a thermal shrinkage rate of 6%
Implementation Method 3
The welding portion is configured to be welded with the welding supporting portion, thereby enabling the cover and the bottom shell to be sealed
Data Source
AI summary
Disclosed are a battery housing and a battery. The battery housing includes a bottom shell and a cover. The cover includes an outer contact layer, an insulating layer, and an inner contact layer. The electrode connecting portion of the inner contact layer is electrically connected to one pole of the battery cell. The other pole of the battery cell is electrically connected to the bottom shell. Since the inner contact layer and the outer contact layer are insulated through the insulating layer, the bottom shell is also insulated from the inner contact layer, thereby preventing the two electrodes of the battery cell from being mutually connected and short-circuited. Since the inner contact layer and the outer contact layer of the cover are pre-insulated, the insulating film is not needed, thereby simplifying the packaging process of the battery and improving the packaging efficiency.