Laminated Battery Terminal Support Member Stress Distribution
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Solution Overview
Problem
Conventional laminated batteries experience stress concentration at the joint portion between the electrode tab and the output terminal due to external forces like rotary torque and vehicle vibration, leading to reduced battery performance.
Innovation Solution
A laminated battery design that incorporates an insulating member with a support member for the terminal, preventing short-circuits and securely supporting the terminal to distribute stress, thereby reducing concentration at the joint portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal is connected to the electrode tab by screwing or similar methods, then electrical connection is achieved, but stress concentration occurs at the joint portion due to external forces like rotary torque and vibration
Solution Approach 1:
The patent introduces a support member as an intermediary component between the terminal and the electrode tab. This support member is integrated with the insulating member and provides a stable mounting base for the terminal, distributing mechanical stresses away from the fragile joint between the terminal and electrode tab. The support member acts as a mediator that absorbs and disperses external forces such as vibration and rotary torque, preventing stress concentration at the critical connection point.
Solution Approach 2:
The support member structure is designed in advance to cushion and absorb external forces before they can concentrate on the terminal-electrode tab joint. By providing a rigid support structure integrated with the insulating member, the design preemptively protects the joint portion from the harmful effects of vibration and torque during operation, maintaining connection integrity under dynamic loading conditions.
2Device complexity
If the terminal is directly mounted on the electrode tab, then device complexity is reduced, but stress concentration and short-circuit risks increase
Solution Approach 1:
The patent merges the insulating member and the support member into a single integrated component. The support member is formed as part of the insulating member structure, eliminating the need for separate insulating and supporting elements. This integration maintains low device complexity while providing both electrical insulation and mechanical support functions, thereby preventing short-circuits and reducing stress concentration without adding excessive structural complexity.
Solution Approach 2:
The insulating member is designed to serve multiple functions simultaneously: it provides electrical insulation to prevent short-circuits, provides mechanical support for the terminal through its integrated support member, and helps distribute mechanical stresses. This multi-functional design eliminates the need for separate components, maintaining simplicity while enhancing reliability.
3Strength
If the terminal is supported by a support member on the insulating member, then stress concentration is suppressed, but device complexity increases
Solution Approach 1:
The support member is integrated with the insulating member as a unified structure, eliminating the need for separate insulating and supporting components. This merging approach provides the necessary mechanical support to suppress stress concentration while avoiding the complexity increase that would result from adding entirely separate support structures.
Data Source
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AI summary
A laminated battery formed by laminating a plurality of flat cells each having an electrode tab includes: an insulating member disposed to prevent a short-circuit in the electrode tab; and a terminal connected to the electrode tab, wherein a tip end side of the terminal is supported by a support member provided on the insulating member.