Battery Cell Terminal Isolation Structure Against Separator Crushing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Battery cells are prone to deformation and damage during manufacturing processes, leading to direct contact between the electrode terminal and the housing, posing safety hazards.
Innovation Solution
The yield strength of the separation component is set to be at least 30 MPa, with a reinforcement portion clamped between the electrode terminal and the first wall to prevent crushing and maintain structural integrity, reducing the risk of direct contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the separation component uses standard material strength, then manufacturing cost is reduced, but the separation component is crushed during electrode terminal processing
Solution Approach 1:
The separation component uses different materials for different parts: the reinforcement portion uses high-strength material (yield strength ≥30 MPa) to resist crushing during electrode terminal processing, while the body portion uses standard insulating material. This local differentiation of material properties solves the contradiction by applying high strength only where needed during manufacturing.
Solution Approach 2:
The separation component is constructed as a composite structure combining a reinforcement portion made of high-strength material and a body portion made of insulating material. This composite approach allows the component to simultaneously achieve high crushing resistance during manufacturing and adequate insulating properties for safety.
2Strength
If the separation component is made thicker, then resistance to crushing is improved, but the battery cell volume increases
Solution Approach 1:
Instead of uniformly increasing the thickness of the entire separation component, the reinforcement portion is strategically placed only at the location requiring high crushing resistance (between the electrode terminal and first wall). This localized reinforcement achieves the required strength while minimizing the overall volume increase of the battery cell.
Solution Approach 2:
The separation component is divided into two functional segments: a thin body portion for insulation and a localized reinforcement portion for crushing resistance. This segmentation allows the component to achieve high strength-to-volume ratio by concentrating material only where structurally necessary.
3Reliability
If the separation component structure is simplified, then manufacturing is easier, but direct contact between electrode terminal and first wall occurs
Solution Approach 1:
The separation component is segmented into a body portion and a reinforcement portion with distinct functions. The body portion provides insulation, while the reinforcement portion prevents direct contact between the electrode terminal and first wall during processing. This functional segmentation ensures safety without excessive structural complexity.
Solution Approach 2:
The reinforcement portion acts as an intermediary structural element between the electrode terminal and the first wall, maintaining separation during manufacturing processes. This intermediary structure ensures that the electrode terminal does not directly contact the first wall, thereby ensuring battery safety.
Data Source
AI summary
A battery cell, a battery, and an electric device, where the battery cell includes a first wall, an electrode terminal, and a separation component; the electrode terminal is mounted on the first wall; at least part of the separation component is disposed between the first wall and the electrode terminal; and at least a partial structure of the separation component has a yield strength Q1, where Q1 satisfies: Q1≥30 MPa.