Battery Venting Structure With Separable Terminal Pressure Relief
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Solution Overview
Problem
Existing battery explosion-proof structures are prone to breakage due to their weak design, leading to insufficient pressure relief and safety hazards.
Innovation Solution
A battery design featuring a second separable portion on a connecting piece that drives a post terminal and a first separable portion to move, exposing a pressure relief opening when internal pressure exceeds a preset value, allowing sufficient pressure relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a scored structure is used as an explosion-proof structure, then the structure is simple and easy to manufacture, but the structure is weak and prone to breakage resulting in insufficient pressure relief
Solution Approach 1:
The connecting piece is divided into a first separable portion and a second separable portion, creating multiple independent separation paths. When pressure exceeds the preset value, the first explosion-proof structure breaks and the second separable portion separates from the connecting portion, driving the post terminal and first separable portion to move and expose the pressure relief opening, ensuring sufficient pressure relief through segmented failure modes
Solution Approach 2:
The explosion-proof structure transitions from a static scored structure to a dynamic multi-stage separation system. The second separable portion is designed to separate from the connecting portion under pressure, actively driving the post terminal and first separable portion to move, creating a dynamic pressure relief mechanism that responds to pressure changes
2Reliability
If the second separable portion drives the post terminal and first separable portion to move, then pressure relief is sufficient, but the device complexity increases
Solution Approach 1:
The second separable portion integrates multiple functions: it serves as part of the connecting piece structure, acts as the driving element for pressure relief, and connects to both the connecting portion and post terminal. This merging of functions reduces the need for separate dedicated components for each function, managing device complexity while achieving sufficient pressure relief
Data Source
AI summary
A battery includes a case, a post terminal and a pole group in the case. A first side of the case is provided with a first explosion-proof structure extending annularly. A part of the first side of the case located on an inner circumferential side of the first explosion-proof structure is a first separable portion covering a pressure relief opening of the case. The post terminal is on the first separable portion. A side of the pole group adjacent to the post terminal is connected to a connecting piece which includes a connecting portion connected to the pole group and a second separable portion separable from the connecting portion to expose a through opening in the connecting portion. The post terminal is connected to the second separable portion.