Battery Pack Spacer Structure for Heat-Resistant Elastic Loading
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Solution Overview
Problem
Conventional battery pack spacers deteriorate thermally due to high heat conductivity materials, leading to a decrease in elastic function and inability to maintain performance load on secondary batteries, especially during high-rate charging and discharging.
Innovation Solution
A battery pack design featuring a spacer with an elastic part having hollow structures extending along the arrangement direction for elastic deformation and a heat insulation part with lower conductivity than the elastic part, preventing thermal deterioration and ensuring stable load application to secondary batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the spacer is made of a material with high heat conductivity to efficiently dissipate heat, then heat dissipation performance is improved, but the spacer deteriorates thermally and loses its elastic function
Solution Approach 1:
The spacer is designed with non-uniform structure featuring hollow parts distributed within the elastic part, creating local variations in heat conductivity and elastic properties. This allows different regions of the spacer to have optimized characteristics for both heat management and mechanical support
Solution Approach 2:
The spacer functions as a composite structure combining solid elastic material with hollow voids, creating a material system that exhibits both elastic deformation capability and reduced effective heat conductivity, resolving the contradiction between heat dissipation and thermal deterioration
2Duration of action of moving object
If the hollow parts extend perpendicular to the arrangement direction to improve elasticity, then elastic deformability is enhanced, but the structural stability deteriorates
Solution Approach 1:
The hollow parts are configured with asymmetric orientation relative to the spacer geometry, extending along the arrangement direction rather than perpendicular to it. This asymmetric configuration provides both elastic compliance and structural stability by aligning the hollow structure with the primary stress direction
Solution Approach 2:
The hollow parts extend along the arrangement direction (one dimension) rather than perpendicular to it, changing the dimensional orientation of the elastic structure. This dimensional reconfiguration allows the spacer to maintain stability while providing necessary elastic deformability
3Power
If the secondary battery capacity is increased to provide higher output, then power output is improved, but heat generation increases causing faster thermal deterioration of the spacer
Solution Approach 1:
The spacer incorporates hollow parts creating a porous-like structure that reduces effective heat conductivity while maintaining mechanical integrity. This allows the spacer to withstand higher temperatures generated by high-capacity batteries without deteriorating its elastic function
Solution Approach 2:
The hollow parts within the spacer act as an intermediary thermal management feature, providing thermal isolation between the heat-generating battery and the spacer material, thereby protecting the elastic function from thermal deterioration
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
The spacer maintains its elastic function over time, effectively applying a stable load to secondary batteries while reducing thermal deterioration, thus enhancing the battery pack's performance and longevity.
Implementation Method 1
the heat insulation effect of the hollow part or the heat insulation part makes it difficult for the elastic part to be influenced by the heat generation of the secondary battery relatively and the thermal deterioration occurs less easily
Implementation Method 2
the spacer includes the heat insulation part disposed between the elastic part and the rectangular secondary battery in the arrangement direction and having lower heat conductivity than the elastic part
Implementation Method 3
the elastic part including a plurality of hollow parts extending along the arrangement direction and configured to be elastically deformable in the arrangement direction
Data Source
AI summary
A battery pack disclosed herein includes a plurality of rectangular secondary batteries that are disposed along an arrangement direction, and a spacer that is disposed between the rectangular secondary batteries that are adjacent in the arrangement direction. The spacer includes an elastic part including a plurality of hollow parts extending along the arrangement direction and configured to be elastically deformable in the arrangement direction, and a heat insulation part disposed between the elastic part and the rectangular secondary battery in the arrangement direction and having lower heat conductivity than the elastic part.