Elastic Member for Battery Module Pressure Management
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Solution Overview
Problem
Existing battery modules face challenges with complex structures due to pressure being provided by foam steel strips and foam end plates, which impact the service life of the battery module.
Innovation Solution
A battery module design incorporating a housing, battery cell assembly, and an elastic member with a base and bent portion that applies continuous pressure while providing expansion space, using a structure with specific included angles to enhance deformation resistance and uniform stress distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If foam steel strips and foam end plates are used to provide pressure, then the battery module structure becomes complex, but the service life is impacted negatively
Solution Approach 1:
The patent combines the pressure-providing function and expansion space function into a single elastic member structure. The elastic member integrates the base that applies pressure and the bent portion that provides expansion space, eliminating the need for separate foam steel strips and foam end plates, thus simplifying the overall structure while maintaining reliability
Solution Approach 2:
The patent changes the physical state and properties of the pressure-providing component from static foam materials to a dynamic elastic member that can continuously apply pressure and adapt to battery cell expansion, improving service life through continuous pressurization while simplifying the structure through a single adaptable component
2Reliability
If continuous pressure is applied to battery cell assembly, then service life is improved, but expansion space is needed to buffer pressure
Solution Approach 1:
The elastic member is designed with a bent portion that can dynamically deform to provide expansion space while the base continuously applies pressure. This dynamic structure allows the system to maintain pressure stability by adapting to battery cell expansion through the bent portion's deformation, improving service life without compromising pressure stability
Solution Approach 2:
The bent portion of the elastic member is pre-configured to provide expansion space that buffers pressure before excessive stress can damage the battery cells. This beforehand cushioning capability allows continuous pressure application while protecting the battery assembly, improving service life without sacrificing pressure stability
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 design buffers pressure applied to battery cell assemblies, maintaining a pressurized state and dynamic balance, thereby improving the service life of the battery module.
Implementation Method 1
The elastic member includes a base and a bent portion... The base is configured to be able to apply pressure to the battery cell units... The base continuously applies pressure to the battery cell assembly, so that the battery cell assembly is in a pressurized state
Implementation Method 2
the bent portion is configured to be able to provide an expansion space for the battery cell units, so as to buffer pressure applied to the battery cell assembly
Data Source
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AI summary
This application discloses a battery module and an electric device having the battery module. The battery module includes a housing, a battery cell assembly, and an elastic member. The battery cell assembly is disposed in the housing, where the battery cell assembly includes battery cell units arranged along a first direction. The elastic member includes a base and a bent portion. The base is connected to the bent portion. The bent portion is fixed to the housing, the elastic member and the battery cell assembly are arranged in the first direction. The base is configured to be able to apply pressure to the battery cell units, and the bent portion is configured to be able to provide an expansion space for the battery cell units, so as to buffer pressure applied to the battery cell assembly, thereby reducing impact on service life of the battery module. The base continuously applies pressure to the battery cell assembly, so that the battery cell assembly is in a pressurized state and maintains a dynamic balance, conducive to improving service life of the battery module.