Battery Module Wiring Layout Under the Control Board
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Solution Overview
Problem
As the capacity of a battery pack increases, the number of battery cells per module also increases, leading to a higher number of wirings that need to be efficiently accommodated within a limited space on the battery module.
Innovation Solution
A battery module design that incorporates a flexible printed board with wiring positioned between the control board and battery cells, utilizing a plate member and control board configuration to maximize space, including protruding portions, connectors, and a film layer with conductor portions to facilitate efficient electrical connections and space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of battery cells per module is increased to increase capacity, then the battery pack capacity is improved, but the number of wirings increases leading to space utilization problems
Solution Approach 1:
The patent utilizes the vertical dimension by routing wirings through the thickness direction of the module. The flexible printed board is positioned between the upper plate and battery cells, allowing wirings to extend in the vertical direction (thickness direction) rather than only in the horizontal plane. This dimensional transition enables efficient space utilization while accommodating increased wiring requirements from higher cell counts.
Solution Approach 2:
The patent implements nesting by placing the flexible printed board within the vertical space between the upper plate and battery cells. The wirings are nested within the module structure, with the flexible printed board positioned in the gap space, allowing multiple wirings to be accommodated within the existing module volume without increasing the horizontal footprint.
2Adaptability or versatility
If more wirings are disposed on the battery module to handle increased battery cells, then the electrical connectivity is improved, but the space for wiring becomes insufficient
Solution Approach 1:
The flexible printed board transitions wiring layout from a two-dimensional planar arrangement to a three-dimensional configuration by extending wirings in the vertical direction. This allows multiple wirings to be stacked or routed vertically through the module thickness, significantly increasing wiring capacity without proportionally increasing horizontal space requirements.
Solution Approach 2:
The patent employs a flexible printed board as a thin, adaptable substrate that can be bent and routed to accommodate complex wiring paths. The flexibility allows the board to navigate around battery cells and connect to multiple terminals, enabling high wiring density while maintaining ease of installation and adaptability to different module configurations.
Data Source
AI summary
A battery module includes: a plurality of battery cells arranged in a first direction; a plate member provided on a first side of the plurality of battery cells; and a flexible printed board and a control board each provided on the plate member, wherein the flexible printed board has a wiring electrically connected to the control board, and at least a portion of the wiring of the flexible printed board is located between the control board and at least one of the battery cells at a region overlapping with the control board when viewed from the first side.