Battery Module Bus Bar Layout With Fewer Voltage Detection Wires
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Solution Overview
Problem
The existing battery module designs face challenges in reducing the number of voltage detection wires, which occupy a large space and complicate the connecting operation due to increased connection points, leading to space inefficiency and reduced productivity.
Innovation Solution
A battery module design that connects multiple cells through bus bars and reduces the number of voltage detection wires by connecting them to sets of two or more cells, allowing for efficient space utilization and simplified connecting operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage detection wires are provided for each cell connection, then voltage detection accuracy is improved, but the number of wires and space occupation increases
Solution Approach 1:
Multiple voltage detection wires are bundled together to form a single wire harness that connects to multiple battery cells. This merging approach reduces the total number of individual wires and their associated connection points while maintaining the ability to detect voltage across all connected cells, thereby resolving the contradiction between detection accuracy and space occupation.
2Adaptability or versatility
If voltage detection wires are provided for each cell connection, then voltage detection coverage is improved, but the number of connection points and operational complexity increases
Solution Approach 1:
The patent combines multiple voltage detection functions into a single integrated wire harness structure that can detect voltage across multiple battery cells through reduced connection points. This merging maintains comprehensive voltage detection coverage while significantly reducing the complexity of installation and maintenance operations.
3Reliability
If individual voltage detection wires are used for each connection, then detection reliability is improved, but the number of components and manufacturing cost increases
Solution Approach 1:
The patent merges multiple individual voltage detection wires into a single integrated wire harness assembly. This consolidation reduces the total quantity of wire components and connection points required, thereby lowering manufacturing costs and material usage while maintaining the reliability of voltage detection across all connected battery cells through the unified structure.
Data Source
AI summary
A battery module includes: a plurality of battery cells stacked in a predetermined direction and electrically connected together; a plurality of bus bars that electrically connect the plurality of battery cells together; and a plurality of voltage detection wires each connected to one set of two or more battery cells electrically connected together. According to the battery module, the number of the voltage detection wires is reduced, thereby attaining reduced sizes of the bus bars, productivity improved by improved workability, and reduced cost.