Energy Storage Module Air Channel Structure for Cell Temperature Balance
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Solution Overview
Problem
The existing energy storage modules face a significant challenge due to excessive temperature differences between cells, which lead to reduced capacity and overall system benefits, as the high-temperature cells have a lower state of health compared to low-temperature cells, limiting the overall capacity and efficiency of the energy storage module.
Innovation Solution
The implementation of an energy storage module with an air channel mechanical part that includes distinct air channel regions with varying heat dissipation areas per unit volume, where the second air channel region has a greater heat dissipation area than the first, to effectively dissipate heat and reduce temperature differences between cells, thereby maximizing capacity utilization and improving energy yields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If uniform heat dissipation is applied to all cells, then the structure is simple, but the temperature difference between cells becomes excessively large
Solution Approach 1:
The patent applies different heat dissipation areas to different air channel regions corresponding to different cells. Specifically, the second air channel region has a greater heat dissipation area per unit volume than the first air channel region, creating localized heat dissipation characteristics that match the temperature distribution pattern of cells in series.
2Productivity
If cells operate at different temperatures, then individual cell performance is optimized, but the overall module capacity is limited by the lowest state of health cell
Solution Approach 1:
The patent changes the heat dissipation parameter (heat dissipation area per unit volume) of the air channel mechanical part across different regions. By gradually increasing the heat dissipation area from the first air channel region to the second air channel region, the system balances the temperature and state of health across all cells, ensuring they operate within a consistent range to maximize overall module capacity.
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 solution effectively reduces temperature differences between cells, enhances the state of health of high-temperature cells, and maximizes the capacity and efficiency of the energy storage module, while also reducing operating energy consumption and initial investment costs.
Implementation Method 1
an air channel is disposed in the air channel mechanical part... cold air for dissipating heat for the energy storage module successively passes through the air inlet end, a corresponding region (the first air channel region) of the first cell, a corresponding region (the second air channel region) of the second cell, and the air outlet end, to dissipate heat for the first cell and the second cell in sequence
Data Source
AI summary
An energy storage device includes a first cell, a second cell, and an air channel mechanical part. The first cell and the second cell are disposed outside the air channel mechanical part and are sequentially arranged between the air inlet end and the air outlet end, the air channel mechanical part includes a first air channel region and a second air channel region, the first air channel region is disposed correspondingly with the first cell, the second air channel region is disposed correspondingly with the second cell, and a heat dissipation area per unit volume of the second air channel region is greater than a heat dissipation area per unit volume of the first air channel region, to reduce a temperature difference between the second cell and the first cell.