Power Storage Stack Thermal Management with Segmented Heating and Cooling
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Solution Overview
Problem
Power storage devices in vehicles face issues with condensation leading to short-circuiting due to inadequate cooling member arrangements, which also fail to effectively regulate temperature variations in low-temperature environments.
Innovation Solution
A power storage device configuration that includes a deformable heating member and cooling member, with a sheet member forming an enclosed space to prevent condensation, and a pressing mechanism to ensure efficient temperature regulation, while preventing air transfer between heating and cooling spaces to inhibit short-circuiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling member is arranged to cool power storage cells, then cooling efficiency is improved, but condensation occurs and causes short-circuiting
Solution Approach 1:
The patent divides the space around power storage cells into distinct heating regions and cooling regions using a sheet member. The cooling member is positioned in an enclosed space formed by the sheet member, separating it from the heating member. This segmentation prevents condensation generated in the heating region from reaching the cooling member, thereby maintaining cooling efficiency while eliminating short-circuiting risks.
Solution Approach 2:
The sheet member acts as an intermediary barrier between the heating member and cooling member. It forms an enclosed space that contains the cooling member and prevents harmful factors (condensation) from the heating region from reaching the cooling region, thus protecting the power storage cells from short-circuiting while maintaining effective cooling.
2Temperature
If heating member is used to heat power storage stack, then temperature regulation is improved, but temperature variations between cells increase
Solution Approach 1:
The heating member is designed to be deformable and is pressed against the power storage stack through a pressing member, ensuring intimate contact with each cell. This local contact allows uniform heat distribution across all cells, regulating temperature while maintaining temperature uniformity. The deformable nature of the heating member enables it to adapt to the contours of individual cells, providing consistent heating throughout the stack.
3Temperature
If cooling member is pressed against power storage stack, then cooling efficiency is improved, but device complexity increases
Solution Approach 1:
The cooling member is designed as a deformable component that can be pressed against the power storage stack through a pressing member. This flexible design allows the cooling member to conform to the shape of the cells, ensuring efficient thermal contact without requiring complex rigid structures or multiple components. The deformable nature simplifies the overall device structure while maintaining high cooling efficiency.
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 solution effectively inhibits short-circuiting and regulates temperature variations in power storage cells, enhancing cooling efficiency and reducing manufacturing costs by eliminating the need for additional holding members.
Implementation Method 1
a heating member that is deformable to follow steps between the plurality of power storage cells and heats the power storage stack
Implementation Method 2
a cooling member that is deformable to follow the steps between the plurality of power storage cells and has a refrigerant flow passage through which a refrigerant for cooling the power storage stack flows
Implementation Method 3
a refrigerant flow passage through which a refrigerant for cooling the power storage stack flows
Implementation Method 4
condensation may occur around the cooling member, and condensation adheres to the surfaces of the power storage cells
Data Source
AI summary
A power storage device includes: a power storage stack which includes a plurality of power storage cells; a heating member that heats the power storage stack; a cooling member that cools the power storage stack; a first pressing member that presses the heating member against the power storage stack; a second pressing member that presses the cooling member against the power storage stack; and a sheet member covering the bottom of the power storage stack so that an enclosed space is formed between the sheet member and the power storage stack in a cross section of the power storage stack, wherein the sheet member has a first surface and a second surface, the cooling member is disposed on the first surface, within the enclosed space, and the heating member is disposed on the second surface, on an outer side of the enclosed space.