Battery Pack Lower Box With Wedge Pressure Regulation Against Bottom Impact
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Solution Overview
Problem
The bottom of a battery pack is prone to damage due to squeezing during vehicle operation, particularly on bumpy roads or from foreign object impact, leading to deformation of the box bottom wall and potential damage to the battery module and electrolyte leakage.
Innovation Solution
A battery pack design incorporating a pressure regulating member in a wedge shape that redistributes the squeezing force by having a larger spacing on one side closer to the battery top cover and a smaller spacing on the other side closer to the battery bottom wall, minimizing the force applied to the vulnerable welded region between the battery top cover and housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a battery pack is designed to be both lightweight and small in size, then portability and installation space are improved, but heat dissipation capability deteriorates due to limited space for heat dissipation channels
Solution Approach 1:
The patent combines the lower box body structure with heat dissipation functionality by integrating heat dissipation channels directly into the lower box body. The lower box body serves dual purposes: structural support and heat dissipation, eliminating the need for separate heat dissipation components and maintaining lightweight design while improving thermal management
Solution Approach 2:
The lower box body is designed with multi-functionality, serving both as the structural base of the battery pack and as the primary heat dissipation component. The heat dissipation channels are formed as integral parts of the lower box body structure, allowing it to perform multiple functions simultaneously without increasing weight or complexity
2Temperature
If heat dissipation channels are added to improve thermal management, then heat dissipation capability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The heat dissipation channels are merged with the lower box body structure, forming an integrated component rather than separate parts. This reduces the number of components and assembly steps while maintaining effective heat dissipation functionality
Solution Approach 2:
The lower box body is designed with specific structural parameters including heat dissipation channel dimensions, thickness, and material properties optimized for thermal management. By adjusting these parameters during design, effective heat dissipation is achieved without adding complex mechanisms
3Volume of moving object
If the lower box body is made thinner to reduce overall battery pack size, then volume is reduced, but heat dissipation efficiency and structural strength deteriorate
Solution Approach 1:
The lower box body employs local quality optimization by varying thickness and heat dissipation channel distribution in different regions. Areas requiring better heat dissipation have optimized channel configurations, while maintaining overall thinness for compact size. The structure adapts local properties to meet both thermal and spatial requirements
Data Source
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AI summary
A battery pack and a battery pack lower box are provided. The battery pack includes a battery pack lower box having a box bottom wall, a battery module having a module bottom wall, and a pressure regulating member. The box bottom wall has a module opposition region, and the module opposition region is disposed opposite the module bottom wall. The pressure regulating member is disposed in the module opposition region and has a first side and a second side. The first side is close to a battery top cover and the second side is close to a battery bottom wall. The pressure regulating member has a spacing with the module bottom wall, a spacing from the first side being greater than a spacing from the second side.