Battery Module Busbar Buffer Structure for Cell Swelling
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Solution Overview
Problem
Existing battery modules face connection stability issues due to cell swelling, which affects electrical energy transmission, particularly between the busbar and the cell, leading to potential disruptions in energy transfer.
Innovation Solution
A battery module design incorporating a housing, a cell assembly, a first elastic member, and a conductive member with a buffer part that stretches to absorb the swelling force, maintaining connection stability and facilitating electrical energy transmission by reducing the stretching force on the conductive member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the busbar is directly connected to the cell, then electrical energy transmission is enabled, but cell swelling causes displacement that affects connection stability
Solution Approach 1:
The conductive member is designed with a buffer part that can dynamically deform and stretch to accommodate cell swelling. This dynamic structure allows the conductive member to maintain electrical connection while adapting to changes in cell volume, thereby resolving the contradiction between enabling direct connection for energy transmission and maintaining connection stability during swelling.
Solution Approach 2:
The buffer part of the conductive member is designed to change its physical parameters (length, shape) in response to cell swelling. By allowing parameter changes in the conductive member, the system can maintain stable electrical connection despite changes in cell dimensions, thus resolving the contradiction between direct connection and connection stability.
2Volume of moving object
If the cell is allowed to swell freely, then swelling space is provided, but connection between busbar and cell is affected
Solution Approach 1:
The buffer part of the conductive member acts as an intermediary between the cell and the busbar. It absorbs the mechanical stress from cell swelling while maintaining the electrical connection pathway, thus allowing the cell to swell freely without compromising electrical energy transmission reliability.
3Reliability
If the elastic member applies pressure to the cell assembly, then connection stability is improved, but the conductive member experiences increased pulling force
Solution Approach 1:
The buffer part of the conductive member is designed as a flexible structure that can stretch and deform. This flexibility allows it to absorb the pulling force generated by the elastic member's pressure on the swelling cell, thereby maintaining connection stability without transmitting excessive force to the conductive member's fixed portions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances connection stability between the conductive member and the cell assembly, ensuring continuous and efficient electrical energy transmission while prolonging the service life of the battery module by maintaining a pressed state and providing a swelling space for the cell.
Implementation Method 1
the first elastic member is configured to apply pressure to the cell assembly and provide a swelling space for the cell
Implementation Method 2
The buffer part is configured to be stretched along the first direction by the first elastic member when the cell assembly swells, buffering a pulling force applied by the first elastic member to the first conductive member
Data Source
AI summary
A battery module includes a housing, a cell assembly, a first elastic member, and a first conductive member. The cell assembly is disposed in the housing. The cell assembly includes a plurality of cell units arranged along a first direction. Each cell unit includes a cell. Along the first direction, the first elastic member is disposed between the cell assembly and the housing. The first elastic member is configured to apply pressure to the cell assembly and provide a swelling space for the cell. Along the first direction, an end of the first conductive member is fixedly connected to the first elastic member. The first conductive member includes a buffer part. The buffer part is configured to be stretched along the first direction by the first elastic member when the cell assembly swells.