Battery Case Slope Structure for Rapid-Cycle Heat Dissipation
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Solution Overview
Problem
Conventional battery modules face challenges in heat dissipation during rapid charge and discharge cycles, leading to increased Joule heat generation and inefficient cooling.
Innovation Solution
The battery design incorporates a tubular case with a sloped bottom surface for enhanced thermal contact between the electrode group and the case, allowing for active heat release through both the bottom and side walls, facilitated by an insulating sheet that applies a normal force to the electrode group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If rapid charge and discharge are performed, then power output is improved, but Joule heat generation increases and heat dissipation becomes insufficient
Solution Approach 1:
The patent transitions from single-point thermal contact to multi-dimensional thermal contact by providing slopes on both the bottom surface and side surfaces of the case. This allows heat to be dissipated through multiple surfaces (bottom and sides) simultaneously, effectively increasing the heat dissipation area and capability while maintaining high power output during rapid charge and discharge cycles.
Solution Approach 2:
The patent applies different thermal contact configurations to different regions of the case. The bottom surface has a slope structure, and the side surfaces also have slope structures, creating localized areas of enhanced thermal contact. This ensures that heat is efficiently conducted from the electrode group to specific regions of the case optimized for heat dissipation.
2Temperature
If the electrode group is pressed against a flat bottom, then thermal contact is limited, but structural simplicity is maintained
Solution Approach 1:
The patent replaces the flat bottom surface with a sloped surface structure. The slope creates an inclined plane that increases the contact area between the electrode group and the case bottom, improving thermal contact efficiency. This curved/angled surface design enhances heat transfer while adding only moderate structural complexity.
3Temperature
If only the bottom surface is used for heat dissipation, then heat release capacity is limited, but the case design remains simple
Solution Approach 1:
The patent extends heat dissipation from a single dimension (bottom surface only) to multiple dimensions by adding slope structures on the side surfaces. This allows heat to be conducted to and dissipated from multiple surfaces simultaneously (bottom and sides), significantly increasing the overall heat release capacity while maintaining relatively simple case construction.
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
This design significantly improves heat dissipation performance by enabling efficient heat transfer to the case's bottom and side walls, effectively managing heat generated during charge and discharge cycles.
Implementation Method 1
the electrode group is in thermal contact with the slope
Implementation Method 2
the electrode group is easily pressed toward the case side wall by normal force directly applied to the electrode group from the slope or indirectly applied to the electrode group through an insulating sheet
Data Source
AI summary
A battery includes an electrode group, and a rectangular exterior casing that houses the electrode group and includes a tubular side wall, a bottom connected to a lower end of the side wall in a Z direction, and an opening provided at an upper end. An inner surface of the bottom of the exterior casing has a slope inclined with respect to a plane orthogonal to the Z direction. The electrode group is in thermal contact with the slope. The bottom may have a protrusion protruding inward in the Z direction of the exterior casing, and the slope may be formed on the protrusion.