Battery Pack Connector Sealing Against Moisture Infiltration
Solution Overview
Problem
Existing high-power battery packs using nonaqueous electrolytes face challenges in preventing moisture infiltration, which can affect the reliability and longevity of the batteries, especially when exposed to external environments.
Innovation Solution
A battery pack design that incorporates a sealing member, typically made of rubber, surrounding the connector to fill the gap between the connector and the housing, with thread holes and grooves for secure fixation, along with a terminal cover to protect the electrode terminals, ensuring moisture prevention and electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the connector is exposed outside the housing for electrical connection, then ease of operation is improved, but moisture infiltration risk increases
Solution Approach 1:
A sealing member made of elastomeric material is introduced as an intermediary between the connector and the external environment. This sealing member includes a through hole that allows the connector to pass through while maintaining moisture barrier functionality, thus mediating between electrical connectivity and moisture protection requirements
2Reliability
If the sealing member is added to surround the connector, then reliability is improved, but device complexity increases
Solution Approach 1:
The sealing member is constructed from elastomeric material forming a flexible shell structure that surrounds the connector. This flexible sealing shell provides effective moisture barrier protection while maintaining a relatively simple overall structure through its elastic deformation capability and conformal fit around the connector
Solution Approach 2:
The sealing member is configured to nest around the connector, with the connector passing through the through hole of the sealing member. This nested arrangement integrates the connector and sealing member into a compact assembly, reducing overall structural complexity while maintaining effective sealing
Data Source
AI summary
A battery pack including a plurality of battery cells; a housing accommodating the plurality of battery cells; a connector coupled to the housing, at least a portion of the connector being exposed outside of the housing; and a sealing member coupled to the connector, the sealing member surrounding the exposed portion of the connector.