Battery Cooling Plate Layout to Protect Electrode Sheet Boundaries
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Solution Overview
Problem
In battery units with stacked electrode sheets and a cooling plate, stress concentration occurs at the boundary between coated and uncoated portions of the electrode sheets, and manufacturing errors can lead to steps on the cooling plate, causing damage to the electrode sheets.
Innovation Solution
The battery unit design ensures that the boundary between the coated and uncoated portions of the electrode sheets does not overlap with the boundary between the main plate and the sensor holder on the cooling plate, distributing stress and reducing the likelihood of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cooling plate is in abutting contact with the battery module surface, then cooling efficiency is improved, but steps on the cooling plate can damage the electrode sheets at stress concentration boundaries
Solution Approach 1:
A buffer layer is introduced between the cooling plate and the battery module to act as an intermediary element. This buffer layer absorbs the mechanical stress from steps on the cooling plate, preventing direct transmission of stress to the electrode sheets while maintaining thermal contact for efficient cooling.
Solution Approach 2:
The buffer layer is positioned in advance between the cooling plate and battery module to provide cushioning protection. It预先 absorbs and distributes the stress from manufacturing steps in the cooling plate, preventing damage to the electrode sheets before stress concentration can occur.
2Ease of manufacture
If the boundary between coated and uncoated portions is aligned with the boundary between main plate and sensor holder, then manufacturing is simplified, but stress concentration occurs at overlapping boundaries causing electrode sheet damage
Solution Approach 1:
The design intentionally creates asymmetric positioning between the electrode sheet boundary and the cooling plate boundary. By offsetting these boundaries so they do not overlap, the design exploits the asymmetric stress distribution to avoid concentration at any single point, thereby preventing electrode sheet damage while maintaining manufacturing feasibility.
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 effectively reduces damage to the electrode sheets by preventing direct contact between potential stress points and manufacturing errors, thereby enhancing the durability and reliability of the battery unit.
Implementation Method 1
a cooling plate that is superposed on a surface of the battery module... configured to cool the battery module
Data Source
AI summary
A battery unit includes a battery module having electrode sheets stacked along a first direction, and a cooling plate superposed on a surface of the battery module. Each electrode sheet has a coated portion having a surface on which an active substance exists, and an uncoated portion that is located adjacent to the coated portion, and has both surfaces on which the active substance does not exist. The cooling plate has a main plate opposed to the coated portion, and a sensor holder attached to an outer edge of the main plate. A boundary between the coated portion and uncoated portion of the electrode sheet and a boundary between the main plate and the sensor holder on an abutting surface of the cooling plate do not overlap with each other, when viewed along the first direction, in a section in which the boundaries extend in parallel with each other.