Battery Box Assembly With External Thermal Management Layout
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Solution Overview
Problem
Existing battery technologies face reliability issues due to thermal runaway caused by insulation failure from liquid leakage or corrosion-induced perforation of thermal management components located inside the case, leading to short-circuits and reduced performance.
Innovation Solution
A case assembly design that positions the thermal management component outside the case, incorporating a buffer layer and a bottom protective plate to protect the component, reducing the risk of damage and facilitating easy assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the thermal management component is disposed inside the case, then the thermal management effect is improved, but the reliability deteriorates due to liquid leakage or corrosion-induced perforation causing thermal runaway
Solution Approach 1:
The thermal management component is extracted from the interior space of the case and repositioned to the exterior surface. This separation removes the component containing conductive liquid from the battery cell environment, eliminating the risk pathway where liquid leakage could cause short-circuits or thermal runaway, thus resolving the reliability issue while preserving thermal management functionality through external heat dissipation
2Reliability
If the thermal management component is disposed outside the case, then the reliability is improved, but the thermal management effect deteriorates due to reduced heat exchange efficiency
Solution Approach 1:
A buffer layer comprising thermally conductive material is introduced as an intermediary between the external thermal management component and the battery cell. This buffer layer serves as a thermal conduit that efficiently transfers heat from the battery cell through the case bottom plate to the external thermal management component, maintaining effective heat exchange despite the component's external position
3Reliability
If the thermal management component is disposed outside the case, then the reliability is improved, but the assembly complexity increases due to additional protective structures
Solution Approach 1:
The case bottom plate and the buffer layer are integrated into a unified structure where the buffer layer is disposed on the outer surface of the bottom plate. This merging combines the structural function of the bottom plate with the thermal conduction function of the buffer layer, creating an integrated assembly that simplifies the overall structure and reduces the number of separate components while maintaining the protective and thermal management functions
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 enhances battery reliability by minimizing thermal runaway risks and simplifies the assembly and maintenance of thermal management components, improving overall performance and safety.
Implementation Method 1
the thermal management component is used to adjust the temperature of the battery cell through the bottom plate
Implementation Method 2
When the case assembly is subjected to an external force, the buffer layer can buffer the thermal management component to a certain extent, thus reducing the risk of damage to the thermal management component
Data Source
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AI summary
A box assembly (11), which relates to the technical field of batteries. The box assembly (11) is used to accommodate a battery cell (12), the box assembly (11) comprising a box body (111), a bottom protective plate (112) and a thermal management component (113), and the box body (111) comprising a bottom plate (1113) used to support the battery cell (12). The bottom protective plate (112) is connected to the bottom plate (1113). At least a portion of the thermal management component (113) is disposed between the bottom plate (1113) and the bottom protective plate (112), the thermal management component (113) being used to adjust the temperature of the battery cell (12) by means of the bottom plate (1113). In this design, the thermal management component (113) is located outside the box body (111); when liquid leakage or corrosion perforation occurs to the thermal management component (113), this reduces the risk of thermal runaway of the battery cell (12) caused by contact between leaked liquid and the battery cell (12) when the thermal management component (113) is located in the box body (111), which causes insulation failure of the battery cell (12). Accordingly, the reliability of the battery during use is increased.