Battery Pack Cell Group Electrical Connection
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Solution Overview
Problem
Conventional battery packs face limitations in maximizing the occupied area by battery cells due to inefficient use of space within the housing, particularly in electrically connecting cell groups without effectively utilizing the available space.
Innovation Solution
The solution involves electrically connecting cell groups on both sides of a partition wall by projecting terminal blocks beyond the wall, using coupling bus bars that connect bus bars from each cell group, and employing insulating retention members to prevent the coupling bus bar from falling out, allowing for efficient assembly and space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If cell groups are electrically connected by conventional methods within the housing, then the structure is simple, but the occupied area by battery cells is not maximized
Solution Approach 1:
The terminal blocks are arranged in the width direction (left-right direction) of the housing rather than only in the longitudinal direction, utilizing the width dimension to connect cell groups. This dimensional change allows effective use of space within the housing and maximizes the occupied area by battery cells while maintaining connection simplicity.
Solution Approach 2:
The electrical connection structure is segmented into multiple terminal blocks (first terminal block, second terminal block, third terminal block) that are distributed across different cell groups. Each terminal block independently connects to its associated cell group, allowing modular and simplified connection architecture that maximizes space utilization.
2Area of moving object
If terminal blocks are arranged to maximize space utilization, then the occupied area increases, but interference between terminal blocks may occur
Solution Approach 1:
Each terminal block is assigned to a specific cell group with dedicated electrical connection paths. The first terminal block connects to the first cell group, the second terminal block to the second cell group, and the third terminal block to the third cell group. This localized assignment ensures that terminal blocks operate independently without interfering with each other while maximizing space utilization.
3Area of moving object
If battery modules are used to retain and bind battery cells, then structural strength is improved, but the occupied area is reduced due to module housing
Solution Approach 1:
The invention extracts the terminal block function from the battery module housing structure. Instead of integrating terminal blocks within module housings, the terminal blocks are directly arranged in the housing and electrically connected to cell groups. This extraction eliminates the need for intermediate module housings, maximizing the occupied area by battery cells while maintaining structural integrity through direct cell group retention.
Data Source
AI summary
Cell groups are electrically connected by effectively using the space within a housing. A housing of a battery pack has therewithin a partition wall which projects in a projecting direction. A first cell group has a plurality of battery cells on one side of the partition wall. A second cell group has a plurality of battery cells on another side. A first terminal block projects from a side of the first cell group toward a side of the second cell group more to a side in the projecting direction than the partition wall. A second terminal block projects from a side of the second cell group toward a side of the first cell group. A coupling bus bar has one end arranged on the first terminal block and another end arranged on the second terminal block, thereby electrically connecting the first cell group and second cell group.