Battery Electrode Holder Spacer for Tab Protection Under Vibration
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Solution Overview
Problem
Existing battery designs are prone to damage of the electrode tab group due to external forces like vibration and impact, which can lead to unstable electrical connections and potential connection failures.
Innovation Solution
A battery configuration that includes a spacer between the electrode body main part and the second side wall of the outer package, which regulates the movement of the electrode body and prevents excessive load on the electrode tab group, thereby reducing the risk of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the electrode tab group is directly connected to the electrical collector body without additional protective structures, then the device complexity is reduced, but the reliability of electrical connection deteriorates due to potential damage from external forces
Solution Approach 1:
The patent introduces a cushioning member positioned between the electrode body and the outer package wall to absorb external forces before they reach the electrode tab group. This beforehand cushioning prevents direct impact on the vulnerable electrode tabs, maintaining electrical connection reliability without adding complex protective structures.
Solution Approach 2:
The cushioning member acts as an intermediary element between the external environment and the electrode tab group. It mediates the transmission of external forces, converting direct mechanical impact into distributed pressure that the electrode structure can withstand, thereby protecting the electrical connection without requiring direct structural reinforcement of the tabs themselves.
2Stability of the object's composition
If the electrode body is firmly fixed in the outer package, then the stability of electrode position is improved, but the ease of manufacture deteriorates due to additional fixation steps
Solution Approach 1:
The cushioning member is designed to automatically position and stabilize the electrode body through its elastic deformation and geometric configuration. When the electrode body is inserted, the cushioning member passively engages with it, providing self-alignment and self-fixation without requiring additional active fixation steps or complex assembly operations.
Solution Approach 2:
The cushioning member utilizes changes in its physical parameters (elastic deformation, compression) to achieve fixation. By designing the member with specific elastic properties and geometric features, it transforms the fixation process from an active mechanical constraint into a passive elastic engagement, simplifying the assembly process while maintaining position stability.
3Ease of operation
If the electrode tab group is made softer to improve flexibility, then the ease of operation is improved, but the strength of the electrode tab group deteriorates making it more susceptible to damage
Solution Approach 1:
The cushioning member provides beforehand protection to the soft, flexible electrode tab group by absorbing external impacts before they can damage the tabs. This allows the electrode tabs to maintain their soft and flexible properties for ease of operation while the cushioning member compensates for the reduced strength by preventing external damage.
Data Source
AI summary
A battery is provided in which an electrode tab group is hardly damaged. In the herein disclosed battery, an electrode body includes an electrode body main body part, a positive electrode tab group protruding from a first end part, and a negative electrode tab group protruding from a second end part. The positive electrode tab group and the negative electrode tab group are folded and bent to make tip ends of electrode tabs respectively configuring these tab groups be arranged along a second side wall of the battery case. A portion of the folded and bent electrode tab is joined to the electrical collector body of the same pole. The battery includes a spacer between the electrode body main body part and the second side wall, and the spacer is to regulate movement of the electrode body.