Rechargeable Battery Vent Unit at Cap Plate Joint
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Solution Overview
Problem
The manufacturing process of conventional rechargeable batteries with vent units is complex due to the need for forming a vent hole in the cover and welding a vent member, which increases production costs and complexity.
Innovation Solution
The vent unit is integrated into the cap plate as part of the battery's design, featuring a notch and groove configuration that allows for simplified formation and reduced constituent elements, thereby simplifying the manufacturing process and lowering production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vent hole is formed in the cover and a vent member is welded in the vent hole, then the vent unit can be installed in the rechargeable battery, but the manufacturing process becomes complicated and production costs increase
Solution Approach 1:
The vent unit is merged with the cap plate to form an integrated structure. The cap plate includes a first plate and a second plate coupled along a joint, and the vent unit is formed at this joint, eliminating the need for separate vent hole formation and vent member welding operations.
Solution Approach 2:
The cap plate is divided into multiple plates (first plate and second plate) coupled together at a joint, with the vent unit formed at this joint. This segmentation allows the vent function to be integrated into the structural components without requiring additional separate parts.
2Reliability
If a vent hole is formed in the cover and a vent member is welded in the vent hole, then the vent unit can be installed in the rechargeable battery, but production costs increase
Solution Approach 1:
The vent unit is merged with the cap plate to form an integrated structure. The cap plate includes a first plate and a second plate coupled along a joint, and the vent unit is formed at this joint, eliminating the need for separate vent hole formation and vent member welding operations.
3Reliability
If multiple separate components are used for the vent unit, then the vent function can be achieved, but the number of constituent elements increases
Solution Approach 1:
The vent unit is merged with the cap plate to form an integrated structure. The cap plate includes a first plate and a second plate coupled along a joint, and the vent unit is formed at this joint, eliminating the need for separate vent hole formation and vent member welding operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design simplifies the manufacturing process and reduces production costs by eliminating the need for separate vent components and complex assembly, while maintaining effective pressure relief mechanisms to prevent battery explosion or ignition.
Implementation Method 1
The vent member is configured to rupture or break and thereby discharge the gas generated inside the rechargeable battery to the outside of the rechargeable battery when the internal pressure of the rechargeable battery exceeds a predetermined pressure.
Data Source
AI summary
A rechargeable battery includes an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode. The rechargeable battery also includes a case accommodating the electrode assembly. The rechargeable battery further includes a cap plate including a first plate and a second plate coupled to the first plate along a joint. The cap plate is coupled to an opening of the case. The rechargeable battery also includes a vent unit at the joint where the first plate of the cap plate is coupled to the second plate.