Vehicle Battery Cooling Circuit With Wraparound Heat Conduction
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Solution Overview
Problem
Li-ion batteries in vehicles suffer from temperature sensitivity, uneven temperature distribution, and safety issues due to high or low temperatures, leading to capacity degradation and reduced lifespan, and conventional cooling systems are heavy and complex.
Innovation Solution
A battery system with a cooling circuit and heat conduction elements that wrap around the battery unit, utilizing materials like graphite, aluminum, and graphene for efficient heat dissipation and even temperature distribution, combined with a closed-loop cooling system and heat exchangers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional fan or water cooling systems are implemented, then cooling capability is provided, but the system becomes heavy and complex
Solution Approach 1:
The patent combines the cooling circuit tubing with heat conduction elements into a single integrated structure. The tubing is arranged to wrap around the battery cells while heat conduction elements are coupled to the tubing, creating a unified thermal management component that performs both fluid transport and heat dissipation functions, thereby reducing system complexity and weight compared to separate cooling systems
Solution Approach 2:
The heat conduction elements act as intermediaries between the battery cells and the cooling fluid in the tubing. These elements facilitate heat transfer from the battery cells to the cooling fluid, enabling efficient thermal management while using a simpler system architecture that avoids complex mechanical cooling components
2Use of energy by moving object
If Li-ion batteries operate at high temperatures, then energy density is maintained, but capacity deteriorates and safety issues arise
Solution Approach 1:
The patent implements active thermal management by circulating cooling fluid through tubing arranged around the battery cells. This changes the operating temperature parameter of the batteries, maintaining them within an optimal temperature range that preserves both energy density and capacity while preventing safety issues associated with high temperatures
3Ease of manufacture
If battery cells have different impedance, then manufacturing is simplified, but uneven temperature distribution occurs
Solution Approach 1:
The patent employs heat conduction elements that are coupled to the cooling tubing and arranged to contact or wrap around individual battery cells. This provides localized heat transfer paths for each cell, addressing the specific thermal needs of each battery unit and ensuring uniform temperature distribution across the battery pack despite variations in cell impedance
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 achieves efficient cooling, even temperature distribution, and increased battery lifespan by maintaining lower operating temperatures, enhancing heat dissipation, and preventing fluid leakage.
Implementation Method 1
one or more heat conduction elements arranged to at least partially wrap around the battery cooling section. The one or more heat conduction elements may be arranged to be in contact with at least a portion of the battery unit
Implementation Method 2
tubing for distribution of a cooling fluid and cooling of the one or more battery cell
Data Source
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AI summary
Battery system (1) for a vehicle, the battery system (1) comprising a battery module (3) and a cooling system (2), wherein the battery module (3) comprises a battery unit (50) with one or more battery cell (51), and wherein the cooling system (2) comprises: - a cooling circuit (4) comprising tubing (42) for distribution of a cooling fluid and cooling of the one or more battery cell (51), the tubing (42) comprising a battery cooling section (41) routed along the battery unit (50), and - one or more heat conduction elements (20) arranged to at least partially wrap around the battery cooling section (41) and be in contact with at least a portion of the battery unit (50).