Battery Module Separator Lid for Electrical Insulation
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Solution Overview
Problem
Conventional battery modules and packs for electric vehicles and hybrid cars have complex configurations that hinder space and weight reduction, necessitating a simpler design for effective insulation and protection of battery cells.
Innovation Solution
A battery module design featuring alternately stacked battery cells and separators with a flexible lid to cover electrical connections, providing insulation and protection while allowing for flexible assembly and integration of monitoring units, such as voltage and temperature detectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate insulating protection member is provided to cover electrical connection members, then insulation and protection of battery cells are improved, but device complexity and mounting space increase
Solution Approach 1:
The insulating protection function is merged into the separator by adding a lid portion to the separator structure. The separator now serves dual purposes: maintaining battery cell spacing and providing insulation protection for electrical connection members through its integrated lid, thereby eliminating the need for separate protection members and reducing overall device complexity
Solution Approach 2:
The separator is transformed into a multi-functional component that simultaneously performs mechanical separation of battery cells and electrical insulation of connection members. The lid portion of the separator acts as both a structural support element and an insulating cover, allowing one component to fulfill multiple protective roles that previously required separate dedicated parts
2Reliability
If a separate insulating protection member is provided to cover electrical connection members, then insulation and protection of battery cells are improved, but mounting space and vehicle weight increase
Solution Approach 1:
The insulating protection function is merged into the separator by adding a lid portion to the separator structure. The separator now serves dual purposes: maintaining battery cell spacing and providing insulation protection for electrical connection members through its integrated lid, thereby eliminating the need for separate protection members and reducing overall device complexity
Solution Approach 2:
The insulating protection function is nested within the existing separator structure rather than being added as an external component. The lid portion of the separator encompasses and protects the electrical connection members, allowing the protection function to be contained within the space already allocated for separator components, thus minimizing additional mounting space requirements
Data Source
AI summary
A battery module includes a plurality of battery cells each of which includes two electrodes and which are arranged such that two electrode groups formed of the electrodes arranged in a row are formed and are electrically connected in series or in parallel by physically and electrically connecting an electrical connection member to each of the two adjacent electrodes in the electrode group; a separator disposed at least between the adjacent battery cells to achieve insulation of the battery cells; and a restraint band holding a state in which the battery cell and the separator are alternately stacked. The separator includes a lid covering the electrical connection member connected to the electrode and the electrode as a connection target of the electrical connection member from a side opposite to the battery cell.