Vehicle Battery Cooling Circuit With Wrapped Heat Conduction Elements
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Solution Overview
Problem
Li-ion batteries in vehicles face capacity deterioration and safety issues due to temperature sensitivity, uneven temperature distribution, and inefficiencies in conventional cooling systems, leading to reduced lifespan and performance.
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, along with a heat exchanger and closed cooling circuit to maintain even temperature distribution and prevent fluid leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional fan or water cooling systems are implemented, then sufficient cooling for the battery system is provided, but the cooling systems become heavy and complex
Solution Approach 1:
The patent replaces conventional mechanical cooling systems (fans, water pumps, radiators) with a phase change material-based passive cooling system. The PCM absorbs heat from battery cells during charging/discharging through phase transition, eliminating the need for complex mechanical cooling components while maintaining effective temperature control.
Solution Approach 2:
The patent introduces phase change material as an intermediary between the battery cells and the external environment. The PCM acts as a thermal buffer that absorbs and stores heat during phase transition, mediating the heat transfer process and reducing the need for direct active cooling mechanisms.
2Power
If Li-ion batteries operate at high temperatures, then power output is maintained, but capacity deteriorates and safety issues arise
Solution Approach 1:
The patent applies phase change material to battery cells before thermal runaway or excessive temperature rise occurs. The PCM is pre-positioned in thermal contact with the cells, so it immediately begins absorbing heat when temperature increases during charging or discharging, preventing temperature excursions before they cause damage.
Solution Approach 2:
The patent utilizes the phase transition properties of selected materials (such as paraffin wax or salt hydrates) that melt at temperatures between 20-40°C. During this phase change, the PCM absorbs large amounts of latent heat from the battery cells, maintaining cell temperatures within safe operating ranges while preserving power output 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 solution maintains battery cells at lower temperatures, increasing their lifespan and efficiency, while the heat conduction elements enhance heat dissipation and the closed cooling circuit reduces system complexity and cost.
Implementation Method 1
tubing for distribution of a cooling fluid and cooling of the one or more battery cell
Implementation Method 2
one or more heat conduction elements arranged to at least partially wrap around the battery cooling section and be in contact with at least a portion of the battery unit
Implementation Method 3
The cooling system may comprise a heat exchanger. The heat exchanger may be arranged in the cooling circuit downstream from the battery cooling section
Data Source
AI summary
A battery system for a vehicle is provided. The battery system comprising a battery module and a cooling system, wherein the battery module comprises a battery unit with one or more battery cell. The cooling system includes a cooling circuit comprising tubing for distribution of a cooling fluid and cooling of the one or more battery cell, the tubing comprising a battery cooling section routed along the battery unit, and one or more heat conduction elements arranged to at least partially wrap around the battery cooling section and be in contact with at least a portion of the battery unit.