Battery Heat Exchanging Plate Layout for Thermal Runaway Venting
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Solution Overview
Problem
Existing battery technologies face issues with heat exchanging plates being damaged by high-temperature and high-pressure substances during thermal runaway, leading to leakage and reduced heat dissipation efficiency due to complex structures and small heat dissipation areas, which complicates manufacturing.
Innovation Solution
A heat exchanging assembly with a discharge structure corresponding to the pressure relief mechanism of a battery cell, featuring heat exchanging flow channels on the sides of the discharge structure, allowing high-temperature substances to be directed away from the main flow channel, and a simple structure design that facilitates easy manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the heat exchanging plate is integrated with the structural beam and the explosion-proof valve is arranged corresponding to the heat exchanging plate, then the structural strength is improved, but the heat exchanging plate is damaged by high-temperature and high-pressure substances during thermal runaway, leading to flow channel leakage
Solution Approach 1:
The patent extracts the harmful function of the heat exchanging plate by introducing a protective layer between the explosion-proof valve and the heat exchanging plate. This protective layer absorbs the impact of high-temperature and high-pressure substances during thermal runaway, preventing damage to the heat exchanging plate while maintaining the integrated structural design.
Solution Approach 2:
The patent applies beforehand cushioning by designing a protective layer that anticipates and absorbs the harmful effects of thermal runaway before they can damage the heat exchanging plate. This protective layer is pre-positioned to intercept high-temperature and high-pressure substances, cushioning the impact and preserving the integrity of the heat exchanging flow channels.
2Reliability
If the explosion-proof valve has a large structural size in the thickness direction of the battery cell, then the safety function is improved, but the heat dissipation area between the battery cell and the heat exchanging plate is reduced, affecting heat exchanging efficiency
Solution Approach 1:
The patent resolves this contradiction by shifting the protective function from the thickness direction to a separate protective layer positioned between the explosion-proof valve and the heat exchanging plate. This dimensional repositioning allows the explosion-proof valve to maintain its large size for safety while the protective layer preserves the heat dissipation area by preventing damage and maintaining optimal thermal contact.
3Strength
If the heat exchanging plate has a complex structure to integrate with the structural beam, then the structural strength is improved, but the manufacturing difficulty increases
Solution Approach 1:
The patent applies segmentation by separating the protective function from the heat exchanging function. The protective layer is designed as a distinct component that can be independently manufactured and then assembled with the heat exchanging plate, simplifying the manufacturing process while maintaining the integrated structural strength through the overall assembly design.
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
Prevents flow channel leakage and enhances heat exchange efficiency by maintaining a sufficient heat dissipation area, improving the ability to rapidly heat or cool the battery cell while simplifying production.
Implementation Method 1
The heat exchanging flow channel is configured to exchange heat with the battery cell
Data Source
AI summary
A heat exchanging assembly, a battery module, a battery, and an electrical device are provided. The heat exchanging assembly includes a heat exchanging plate. The heat exchanging plate has a heat exchanging flow channel. The heat exchanging plate has a discharge structure. The discharge structure is configured to correspond to a pressure relief mechanism of a battery cell. The heat exchanging flow channel is arranged on at least one side of the discharge structure in a width direction of the heat exchanging plate. The heat exchanging flow channel is configured to exchange heat with the battery cell.