Battery Terminal Structure With Integrated Insulation and Rotation Stop
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Solution Overview
Problem
Existing terminal structures for power storage devices require multiple insulating members and a separate rotation stopper, increasing costs and complexity.
Innovation Solution
A terminal structure that uses a ceramic-made insulating member with protruding and recessed parts to fit with the sealing plate, providing electrical insulation and a rotation stopper function, reducing the number of components and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple insulating members and a separate rotation stopper are used, then electrical insulation and rotation prevention are achieved, but the number of components increases and costs increase
Solution Approach 1:
The patent combines the rotation stopper function and electrical insulation function into a single integrated insulating member. The insulating member includes a through-hole for receiving the terminal member and protrusions that fit into recesses on the terminal member, providing both rotation prevention and electrical insulation simultaneously, thereby reducing the total number of components.
Solution Approach 2:
The insulating member is designed to perform multiple functions: it provides electrical insulation between the terminal member and the sealing plate, acts as a rotation stopper through its protrusions and recesses, and serves as a structural support element. This multi-functionality eliminates the need for separate rotation stopper components.
2Reliability
If multiple insulating members and a separate rotation stopper are used, then electrical insulation and rotation prevention are achieved, but assembly complexity increases
Solution Approach 1:
The rotation stopper features are integrated directly into the insulating member structure. The protrusions on the insulating member fit into corresponding recesses on the terminal member, creating a self-aligning assembly that simplifies the manufacturing process by eliminating separate rotation stopper components and reducing assembly steps.
3Reliability
If a ceramic-made insulating member is used, then electrical insulation is achieved, but heat transfer suppression is reduced compared to metal spacers
Solution Approach 1:
The patent changes the material parameter from metal to ceramic for the insulating member. While ceramic has higher thermal conductivity than some insulating materials, the design compensates by positioning the insulating member to provide adequate electrical insulation while allowing controlled heat dissipation, balancing electrical insulation requirements with thermal management considerations.
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 structure achieves electrical insulation and prevents terminal rotation during assembly, reducing costs and complexity while maintaining mechanical strength.
Implementation Method 1
a ceramic-made first insulating member arranged between and electrically insulating the sealing plate and the terminal member from each other
Data Source
AI summary
A terminal structure to be adopted for a power storage device including an outer case that has an opening, includes: a sealing plate sealing the opening; a terminal member inserted into a terminal hole formed in the sealing plate and electrically connected to an electrode; and a first insulating member arranged between the sealing plate and the terminal member, and arranged on an outer surface side of the sealing plate facing an outer side of the power storage device. The terminal member has a first extended part extending further outward than an outer periphery of the terminal hole on the outer side of the power storage device. A first protruding part or a second recessed part provided to the first insulating member and a first recessed part or a second protruding part provided to the sealing plate or to the first extended part fit with each other.