Battery Pack Partition Wall Prevents Electrolyte Leakage
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Solution Overview
Problem
Existing battery packs face challenges in preventing electrolyte leakage from the core pack from contacting the protection circuit module, which can lead to overheating and explosion due to overcharging, overdischarging, or overcurrent, and existing designs may cause operational issues with integrated components like PTC devices.
Innovation Solution
A battery pack design that separates the core pack and protection circuit module using a frame with a partition wall, supporting portions, and a connection tap, preventing electrolyte leakage and accommodating the protection circuit module in a distinct region with a groove and substrate guide, while allowing for easy assembly and reducing defects in PTC devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the core pack and protection circuit module are integrated in a single battery pack design, then the device complexity is reduced and assembly is simplified, but electrolyte leakage from the core pack can contact the protection circuit module causing overheating and explosion risks
Solution Approach 1:
The battery pack is divided into distinct regions: a first region accommodating the core pack and a second region accommodating the protection circuit module, separated by a partition wall. This segmentation prevents electrolyte from the core pack from contacting the protection circuit module, eliminating the safety hazard while maintaining a relatively simple overall structure.
2Volume of moving object
If the protection circuit module is placed close to the core pack for compact design, then the battery pack volume is reduced, but electrolyte leakage can still reach the protection circuit module causing operational failures
Solution Approach 1:
A partition wall is introduced as an intermediary structure between the core pack and protection circuit module. This partition wall physically blocks electrolyte leakage from reaching the protection circuit module while allowing the two components to remain in close proximity within the same battery pack housing, thus maintaining compact volume while ensuring safety.
3Reliability
If the battery pack uses a sealed closed structure to prevent electrolyte leakage, then safety is improved, but heat dissipation from the core pack and protection circuit module is reduced leading to overheating
Solution Approach 1:
The partition wall structure provides localized containment of electrolyte in the first region while maintaining thermal pathways. The partition wall is positioned to block electrolyte leakage routes but does not completely isolate the thermal fields of the core pack and protection circuit module, allowing heat to dissipate through the battery pack structure while preventing electrolyte contact.
Data Source
AI summary
A battery pack including a core pack including a unit cell; a protection circuit module electrically connected to the core pack; and a frame including a first region accommodating the core pack and a second region accommodating the protection circuit module, the frame further including a supporting portion supporting the protection circuit module in the second region, and a partition wall dividing the first region and the second region from each other.