Battery Housing Cooling Unit for Direct Cell Heat Dissipation
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Solution Overview
Problem
Existing lithium-ion battery cooling systems, relying on air or liquid cooling, suffer from low efficiency due to indirect heat export from battery cells, leading to potential performance degradation and safety risks from heat accumulation.
Innovation Solution
Incorporating a cooling unit within the battery housing with a coolant channel that is in thermal conduction contact with battery cells, allowing for direct heat transfer and efficient heat dissipation through a circulating coolant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a coolant channel is set between battery modules or individual batteries for heat exchange, then the battery cooling system can be established, but the heat inside the battery cannot be timely exported due to indirect heat transfer through the battery housing, resulting in low cooling efficiency
Solution Approach 1:
The patent introduces a cooling plate as an intermediary component between the battery cells and the coolant channel. The cooling plate is in direct thermal contact with the battery cells and conducts heat to the coolant channel, serving as an efficient heat transfer mediator that eliminates the need for indirect heat transfer through the battery housing.
Solution Approach 2:
The patent divides the battery pack into multiple segments with cooling plates positioned between adjacent battery cells. Each cooling plate independently manages heat from specific battery cells, allowing for segmented and targeted heat dissipation that improves overall cooling efficiency.
2Quantity of substance
If battery capacity is increased to meet electric vehicle range requirements, then the energy storage capability is improved, but the heat generated during charging and discharging increases, creating safety risks and performance degradation
Solution Approach 1:
The cooling plate acts as an intermediary heat transfer component that directly contacts the battery cells, enabling efficient heat removal from high-capacity batteries during charging and discharging operations, thereby mitigating safety risks associated with increased battery capacity.
Solution Approach 2:
The patent replaces the traditional air cooling system with a liquid cooling system that uses coolant flowing through channels in the cooling plate. This substitution provides more effective heat removal capability necessary for high-capacity batteries while maintaining a compact design.
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 dissipation efficiency, preventing heat accumulation and ensuring safer battery performance by effectively exporting heat generated during charging and discharging.
Implementation Method 1
the cooling unit is in thermal conduction contact with the battery cells in adjacent accommodating cavities
Implementation Method 2
a coolant channel for circulation of a coolant is provided in the cooling unit
Data Source
AI summary
Provided is a lithium-ion secondary battery, comprising a housing and at least two cells packaged in the housing. The housing is provided with at least one cooling unit extending along a length direction of the housing. The cooling unit is provided with a coolant channel for coolant circulation, the cooling unit divides the internal space of the housing into at least two accommodating cavities spaced apart in a thickness direction of the housing. A battery cell is arranged in each accommodating cavity, and the cooling units are in thermal conduction contact with the cells in adjacent accommodating cavities. By providing the cooling unit in the housing, the heat generated by the battery cell can be conducted in time, thereby quickly and effectively solving the heat dissipation problem of the battery cell during charging and discharging. Also provided is an electric vehicle.