Battery Module Bus Bar Layout With Shared Cell Sensing
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Solution Overview
Problem
The increase in the number of sensing units with battery cells leads to an unnecessary increase in the size of the battery module, occupying valuable space.
Innovation Solution
A battery module design with first and second battery groups, each connected by a bus bar assembly, and a shared sensing unit that monitors both groups, eliminating the need for a separate case for the sensing unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of sensing units is increased to monitor more battery cells, then the monitoring capability is improved, but the size of the battery module increases unnecessarily
Solution Approach 1:
The patent combines multiple sensing units into a single integrated sensing unit that can monitor multiple battery groups simultaneously. This merging approach maintains comprehensive monitoring capability while reducing the total number of sensing units and eliminating the need for separate accommodation cases, thereby solving the contradiction between monitoring capability and module size.
Solution Approach 2:
The sensing unit is designed with multi-functionality to monitor multiple battery groups (first battery group and second battery group) through a single unit. This universal design allows one sensing unit to perform the function of multiple separate units, improving space utilization and reducing overall module size while maintaining comprehensive monitoring coverage.
2Reliability
If separate cases are provided for accommodating sensing units, then the sensing units are protected and organized, but the battery module size increases and space utilization decreases
Solution Approach 1:
The patent eliminates separate accommodation cases for sensing units by integrating them directly into the battery module structure. The sensing units are mounted on existing structural components such as the bus bar assembly, which provides both protection and organization without requiring additional dedicated housing space, thereby resolving the contradiction between protection and module size.
Solution Approach 2:
Existing structural components like the bus bar assembly serve multiple functions: electrical connection and sensing unit mounting. This multi-functional design provides protection and organization for sensing units while utilizing already-present structures, avoiding the need for separate cases and reducing overall module volume.
Data Source
AI summary
Provided is a battery module. The battery module includes a module case; first and second battery groups disposed inside the module case to be spaced apart from each other, each of the first and second battery groups including a plurality of battery cells; a first bus bar assembly disposed on a first side of the first battery group, the first bus bar assembly including a first bus bar electrically connecting the plurality of battery cells of the first battery group; a second bus bar assembly disposed on a first side of the second battery group, the second bus bar assembly including a second bus bar electrically connecting the plurality of battery cells of the second battery group; and a sensing unit electrically connected to both the first bus bar and the second bus bar and configured to measure states of the plurality of battery cells.