Dual-Circuit Battery Cooling for Travel and Charging
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Solution Overview
Problem
Existing vehicle battery cooling systems, such as those disclosed in JP-A No. H7-105988, face challenges in efficiently maintaining battery temperature within a predetermined range while the vehicle is both traveling and being charged, as they rely on external cooling water and lack an integrated on-board and off-board cooling solution.
Innovation Solution
A vehicle battery cooling apparatus featuring independent first and second fluid circuits, where the first circuit cools the battery during travel using an on-board cooling device and the second circuit cools the battery during charging using an off-board cooling device, allowing for efficient temperature control without additional weight by utilizing separate cooling fluids and devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single cooling circuit is used for both traveling and charging, then the device complexity is reduced, but the cooling efficiency during both operations deteriorates
Solution Approach 1:
The cooling system is divided into two independent circuits: a first cooling circuit for use during vehicle traveling and a second cooling circuit for use during charging. This segmentation allows each circuit to be optimized for its specific operating condition, thereby maintaining high cooling efficiency in both scenarios without requiring a complex integrated system.
2Weight of moving object
If off-board cooling devices are used, then the weight of the vehicle is reduced, but the reliability of cooling during charging may deteriorate
Solution Approach 1:
The system separates cooling responsibilities between on-board (first cooling circuit) and off-board (second cooling circuit) systems. The on-board circuit ensures reliable cooling during traveling, while the off-board circuit provides supplemental cooling during charging without adding significant weight to the vehicle.
3Weight of moving object
If cooling water is supplied from outside the vehicle, then the on-board cooling system weight is reduced, but the ease of operation deteriorates
Solution Approach 1:
The cooling system is segmented into on-board components (first cooling circuit with on-board cooling device) and off-board components (second cooling circuit with external cooling device). This allows the vehicle to operate independently during traveling while accepting external cooling support during charging, balancing weight reduction with operational convenience.
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 configuration enables efficient cooling of the battery during both travel and charging, reduces the occupied space, and minimizes weight by using off-board cooling devices, thereby maintaining optimal battery temperature and efficiency.
Implementation Method 1
a first cooling fluid to cool the battery is to be circulated
Implementation Method 2
cooling fluid is to be circulated
Implementation Method 3
a second cooling fluid to cool the battery is to be circulated
Implementation Method 4
cooling fluid is to be circulated
Data Source
AI summary
A vehicle battery cooling apparatus configured to cool a battery mounted on a vehicle includes a first fluid circuit and a second fluid circuit. In the first fluid circuit, a first cooling fluid to cool the battery is to be circulated while the vehicle is traveling. In a second fluid circuit, a second cooling fluid to cool the battery is to be circulated while the battery is being charged. The first fluid circuit and the second fluid circuit are independent from each other.