Battery Cell Heat Exchange Layout to Limit Condensate Short Circuits
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Solution Overview
Problem
Batteries are prone to short-circuiting due to condensate water dripping onto electrode terminals and busbars from heat exchange zones with temperature differences, compromising safety performance.
Innovation Solution
The battery design includes a heat exchange member with a heat exchange zone covered by the second walls of battery cells, ensuring the heat exchange zone is protected and reducing the risk of condensate water formation, while allowing for efficient heat exchange and improved space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat exchange member is added to improve heat exchange efficiency, then temperature control is improved, but condensate water forms and causes short circuit risks
Solution Approach 1:
The patent extracts the harmful condensate water formation by isolating the heat exchange zone from direct exposure to battery cell surfaces. The heat exchange member is positioned such that its heat exchange zone faces away from the battery cells, preventing condensate water from forming on surfaces where it could cause short circuits, while still maintaining effective heat exchange through thermal coupling.
Solution Approach 2:
The patent introduces an intermediary structure (the heat exchange member with its heat exchange zone) that mediates between the battery cells and the cooling system. This intermediary allows heat exchange to occur while preventing direct contact between condensate water and conductive components, thus resolving the contradiction between temperature control and short circuit prevention.
2Productivity
If the heat exchange zone is enlarged to improve heat exchange efficiency, then heat dissipation is improved, but the risk of condensate water production increases
Solution Approach 1:
The patent applies local quality by directing the heat exchange zone toward regions where condensate water formation is less likely to cause harm. The heat exchange member is positioned and oriented such that the heat exchange zone focuses on areas away from electrode terminals and busbars, allowing enlarged heat exchange surface area without proportionally increasing short circuit risks.
3Quantity of substance
If battery cells are arranged densely to increase energy density, then space utilization is improved, but heat exchange efficiency may be compromised
Solution Approach 1:
The patent resolves the contradiction by transitioning from two-dimensional planar heat exchange to three-dimensional spatial heat exchange. The heat exchange member extends in multiple directions with its heat exchange zone oriented to face away from battery cells, enabling effective heat exchange in dense configurations by utilizing spatial dimensions rather than just surface area.
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 significantly reduces the risk of short circuits and enhances safety performance by minimizing condensate water accumulation, while maintaining effective heat exchange and increasing energy density.
Implementation Method 1
the heat exchange member has a heat exchange zone, the heat exchange zone extends in the second direction and a third direction... the heat exchange zone is used for heat exchange with the battery cells
Implementation Method 2
the second walls of the plurality of battery cells cover the heat exchange zone... reduces the possibility of producing condensate water on the surface of the heat exchange member
Data Source
AI summary
A battery comprises a plurality of battery cells and a heat exchange member. Each battery cell comprises a housing and a pressure relief mechanism, the housing has a first wall and a second wall opposite to each other in a first direction, the pressure relief mechanism is disposed in the first wall, and the plurality of battery cells are arranged at least in a second direction. The heat exchange member is disposed at the side of the plurality of battery cells close to the second walls, the heat exchange member has a heat exchange zone, the heat exchange zone extends in the second direction and a third direction, and the first direction, the second direction and the third direction intersect one another. The heat exchange zone is used for heat exchange with the battery cells, and the second walls of the plurality of battery cells cover the heat exchange zone.