Battery Fixing Member for Tab Damage Prevention
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Solution Overview
Problem
Battery electrode tab groups are prone to damage due to external forces like vibration and impact, leading to unstable electrical connections and potential connection failures, especially when bent and subjected to concentrated stress.
Innovation Solution
A battery design incorporating a fixing member on at least one flat outer surface of the battery case to secure the electrode electrical collector parts, preventing movement and load on the tab groups, thereby reducing the risk of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode tab group is bent and connected to the electrode electrical collector part, then the electrical connection is achieved, but the electrode tab group becomes vulnerable to damage from external forces
Solution Approach 1:
The electrode tab group is pre-bent into the desired shape before connection to the electrode electrical collector part. This preliminary shaping allows the tabs to be properly positioned and connected while maintaining their structural integrity, reducing stress concentration that would occur if bending happened after connection.
Solution Approach 2:
The electrode electrical collector part acts as an intermediary component between the electrode body and the terminal. It provides a robust connection point that distributes mechanical stress, protecting the softer electrode tab group from direct impact forces while maintaining electrical connectivity.
2Device complexity
If the electrode body is allowed to move freely in the battery case, then the assembly is simple, but the electrode tab group is subjected to load and damage from external forces
Solution Approach 1:
The battery case is divided into functional zones: a first region that accommodates the electrode body with movement freedom, and a second region that houses the electrode electrical collector part and terminal with restricted movement. This segmentation allows the electrode body to expand/contract while protecting the connected tab group from excessive displacement forces.
Solution Approach 2:
Different regions of the battery case provide different mechanical constraints. The region around the electrode body allows flexibility for thermal expansion, while the region around the electrode electrical collector part provides rigid support and positioning. This localized differentiation of mechanical properties protects the tab group without overly constraining the electrode body.
Data Source
AI summary
A battery is provided in which a damage of the electrode tab group is suitably inhibited. Suitable one aspect of the battery herein disclosed is provided with a battery comprising an electrode body with a positive electrode and a negative electrode, and that is formed in a flat hexahedron shape having a pair of rectangular-shaped flat outer surfaces, and includes a battery case that accommodates them. Here, a fixing member is arranged from at least one flat outer surface among a pair of flat outer surfaces to a positive electrode electrical collector part or a negative electrode electrical collector part of the electrode body.