Secondary Battery Cell Structure for Better Cooling Plate Heat Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing secondary batteries face limitations in heat conductivity improvement due to the properties and use of heat conductive members, which are often expensive and have limited effectiveness.
Innovation Solution
The secondary battery design incorporates a cell body member with a surface area-increasing groove on its lower surface, forming a concave shape in contact with a heat conductive member, and an asymmetrical or rounded design to enhance contact surface area and prevent air gaps, thereby improving heat transfer paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat conductive materials are added or heat conductive members are used to enhance heat conductivity, then heat dissipation performance is improved, but manufacturing cost increases and device complexity increases
Solution Approach 1:
The lower surface of the cell body member is segmented into multiple protrusions that extend toward the cooling plate member, creating multiple discrete heat transfer pathways. This segmentation increases the effective heat transfer area without requiring additional heat conductive materials or complex cooling structures, thereby improving heat dissipation while maintaining device simplicity
Solution Approach 2:
The invention transitions from a conventional flat lower surface to a three-dimensional structure with multiple protrusions extending in the thickness direction. This dimensional change increases the heat transfer surface area and creates multiple heat transfer paths to the cooling plate member, enhancing heat dissipation performance without adding external heat conductive components
2Temperature
If heat conductive materials are added or heat conductive members are used to enhance heat conductivity, then heat dissipation performance is improved, but manufacturing cost increases
Solution Approach 1:
The lower surface is divided into multiple protrusions that can be formed through conventional molding processes. This segmentation approach increases heat transfer area without requiring expensive heat conductive materials or complex assembly steps, making the solution cost-effective while maintaining ease of manufacture
Solution Approach 2:
The protrusions feature curved surfaces that naturally facilitate heat transfer and can be efficiently manufactured using standard molding techniques. The curved geometry provides effective heat dissipation without requiring additional processing steps or expensive materials, maintaining manufacturing simplicity
3Temperature
If the contact surface area between cell body member and cooling plate member is increased using heat conductive members, then heat transfer efficiency is improved, but the amount of heat conductive material required increases
Solution Approach 1:
Instead of using a large amount of heat conductive material to fill gaps, the invention uses multiple small protrusions that inherently provide contact points with the cooling plate member. This reduces or eliminates the need for additional heat conductive materials while achieving effective heat transfer through the structured geometry of the protrusions themselves
Solution Approach 2:
The protrusions on the cell body member serve dual functions: they structurally support the battery pack and simultaneously act as heat transfer pathways to the cooling plate member. This self-service approach eliminates the need for separate heat conductive materials, reducing both cost and material quantity while maintaining effective heat dissipation
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 heat conductivity while reducing the need for additional heat conductive materials, preventing product cost increases and ensuring efficient heat dissipation.
Implementation Method 1
the heat conductive member provided in at least a portion between the cell body member and the cooling plate member to form a heat path for transferring heat from the cell body member to the cooling plate member
Implementation Method 2
the surface area-increasing groove includes a curved-region in a cross section in a thickness direction of the cell body member
Data Source
AI summary
A secondary battery may include a cell body member accommodating an electrode assembly therein, including three sealing sides and provided adjacently to a cooling plate member; and the cell body member, in contact with a heat conductive member on a lower surface thereof includes a surface area-increasing groove formed to be concave in the lower surface thereof and the lower surface is a region in which a sealing portion is not formed, the heat conductive member is provided in at least a portion between the cell body member and the cooling plate member to form a heat path for transferring heat from the cell body member to the cooling plate member, the surface area-increasing groove includes a curved-region in a cross section in a thickness direction of the cell body member, and the curved-region is in contact with the heat conductive member.