Battery Thermal Management via Planar Heat Transfer Unit
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Solution Overview
Problem
Conventional battery packs for electric vehicles face challenges in efficiently dissipating heat during charging and discharging, and lack effective heating solutions for cold start conditions, which can impact power delivery and battery lifespan.
Innovation Solution
A system comprising a planar shape heat transferring unit, a cooling plate, a heating plate, a radiator, a heater, and a controller, which selectively uses cooling and heating fluids to maintain battery cell temperature by forming a thermal ground plane with a porous coating layer for uniform heat transfer and efficient temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling passage is formed between stacked battery cells to dissipate heat, then heat dissipation efficiency is improved, but device complexity increases
Solution Approach 1:
The patent combines the cooling plate and heating plate into a single integrated temperature control device that can perform both cooling and heating functions. The planar shape heat transferring unit serves as a common interface for both thermal management modes, reducing the number of separate components and simplifying the overall structure while maintaining effective heat dissipation capability.
Solution Approach 2:
The temperature control device is designed with multi-functionality, where the same device structure (cooling plate/heating plate with planar heat transferring unit) can operate in both cooling mode and heating mode. This universal design eliminates the need for separate cooling and heating systems, reducing device complexity while achieving effective thermal management in both directions.
2Temperature
If conventional cooling systems are used for battery packs, then heat dissipation is improved, but heating capability for cold start is lost
Solution Approach 1:
The temperature control device is designed with multi-functionality, where the same device structure (cooling plate/heating plate with planar heat transferring unit) can operate in both cooling mode and heating mode. This universal design eliminates the need for separate cooling and heating systems, reducing device complexity while achieving effective thermal management in both directions.
Solution Approach 2:
The system dynamically switches between cooling and heating operations based on real-time temperature conditions. The controller activates either the cooling fluid circulation or heating fluid circulation depending on whether the battery temperature exceeds or falls below the predetermined threshold, enabling the system to adapt to varying thermal requirements and extend its applicability to both hot and cold temperature management scenarios.
3Adaptability or versatility
If a planar shape heat transferring unit is used for both cooling and heating, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent combines the cooling plate and heating plate into a single integrated temperature control device that can perform both cooling and heating functions. The planar shape heat transferring unit serves as a common interface for both thermal management modes, reducing the number of separate components and simplifying the overall structure while maintaining effective heat dissipation capability.
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 system effectively maintains battery cell temperature within a predetermined range, ensuring efficient cooling and heating, thereby enhancing battery performance and lifespan, especially in cold start conditions.
Implementation Method 1
The cooling plate is disposed at a first side of the battery cell to be heat-transferred with the planar shape heat transferring unit. A cooling passage through which a cooling fluid passes is formed inside of the cooling pate. The heating plate is disposed at a second side of the battery cell to be heat-transferred with the planar shape heat transferring unit.
Implementation Method 2
The radiator is connected to the cooling passage, to provide a cooled first fluid to the cooling passage.
Implementation Method 3
The heater is connected to the heating passage, to provide a heated second fluid to the heating passage.
Implementation Method 4
A cooling passage through which a cooling fluid passes is formed inside of the cooling pate. The radiator is connected to the cooling passage, to provide a cooled first fluid to the cooling passage.
Implementation Method 5
A heating passage through which a heating fluid passes is formed inside of the heating pate. The heater is connected to the heating passage, to provide a heated second fluid to the heating passage.
Data Source
AI summary
In a system for controlling battery cell temperature and a method for controlling the system, the system includes a planar shape heat transferring unit, a cooling plate, a heating plate, a radiator, a heater and a controller. The planar shape heat transferring unit makes contact with a battery cell. The cooling plate is disposed at a first side of the battery cell to be heat-transferred with the planar shape heat transferring unit. The heating plate is disposed at a second side of the battery cell to be heat-transferred with the planar shape heat transferring unit. The radiator is connected to the cooling passage, to provide a cooled first fluid to the cooling passage. The heater is connected to the heating passage, to provide a heated second fluid to the heating passage. The controller is configured to provide the first fluid or the second fluid.