Battery Cell Inversion Layout for Collision Load Rigidity
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Solution Overview
Problem
Traction batteries used in new energy vehicles have low energy density, poor rigidity, and safety concerns due to uneven stress distribution during collisions, leading to potential safety accidents and performance issues.
Innovation Solution
A battery design with a case having an opening at the bottom, where the battery cell is arranged upside down with an end cap facing the bottom, incorporating a pressure relief mechanism and electrode terminals, and a protective assembly with distributed protective members to enhance rigidity and safety, while maintaining suitable energy density and structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the battery cell is arranged with end cap facing upward in the case, then the assembly is straightforward, but the rigidity of the battery top is poor and cannot bear load from other parts
Solution Approach 1:
The patent inverts the conventional arrangement by positioning the end cap facing downward instead of upward. This inversion allows the end cap to serve as the load-bearing interface with other battery parts, thereby improving rigidity while maintaining assembly simplicity through the same straightforward positioning approach.
2Ease of operation
If the electrode terminals and pressure relief mechanism are arranged facing upward, then the components are easily accessible, but the stress distribution during collision is uneven causing safety issues
Solution Approach 1:
The patent inverts the arrangement of electrode terminals and pressure relief mechanism, positioning them facing downward toward the bottom of the case. This inversion creates a more stable structural configuration that distributes stress evenly during collisions, improving safety while the components remain accessible through the bottom interface.
3Volume of moving object
If the battery uses a compact design to reduce volume, then space efficiency improves, but the structural strength and safety during collisions deteriorate
Solution Approach 1:
The patent optimizes the spatial arrangement of components along the vertical dimension by positioning the end cap and key components at the bottom. This dimensional optimization allows for a compact overall volume while maintaining adequate structural strength through the strategically placed bottom-mounted configuration that improves collision resistance.
Data Source
AI summary
Embodiments of the present application provide a battery and a power consuming device. The battery includes a case and a battery cell. The case has a top and a bottom opposite to each other in a height direction of the case. The bottom is provided with an opening. The battery cell is arranged upside down in the case with an end cap facing the bottom, the end cap is provided with a pressure relief mechanism and electrode terminals, and the pressure relief mechanism and the electrode terminals are both arranged to face the bottom.