Charging Pile Liquid Cooling for EV Battery Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-power charging of electric vehicles leads to excessive heat generation in power batteries, reducing efficiency and safety, and existing vehicle-mounted thermal management systems struggle to meet the increasing heat dissipation requirements.
Innovation Solution
A charging pile equipped with a coolant storage tank, heat exchanger, and dedicated coolant channels for heat dissipation and supplementation, allowing controlled circulation and supply of coolant to the vehicle's battery, enhancing heat dissipation and coolant replenishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-power charging is provided to electric vehicles, then charging speed is improved, but heat generation in power batteries increases excessively
Solution Approach 1:
The charging system is segmented into independent cooling circuits with multiple heat exchangers (first heat exchanger for battery cooling, second heat exchanger for coolant cooling) that can operate independently. This allows the charging process to be divided into charging function and cooling function, enabling high-power charging while maintaining effective heat dissipation through separate thermal management pathways.
Solution Approach 2:
A coolant serves as an intermediary substance between the battery and the environment. The coolant circulates through the battery cooling circuit, absorbing heat from the power batteries, then passes through heat exchangers where the heat is transferred to a second coolant or dissipated. This intermediary mechanism enables efficient heat removal without directly cooling the batteries, allowing high-power charging to proceed safely.
2Temperature
If vehicle-mounted thermal management systems are used, then heat dissipation is provided, but the systems struggle to meet increasing heat dissipation requirements
Solution Approach 1:
The charging pile integrates multiple functions into a single system: charging function (through charging connector), battery cooling function (through first heat exchanger and coolant circulation), and coolant cooling function (through second heat exchanger). This multi-functional design allows the same device to adapt to different charging powers and heat dissipation requirements, providing universal applicability from standard charging to ultra-fast charging scenarios.
Solution Approach 2:
The thermal management system employs dynamic control through multiple valves (first two-way valve, second two-way valve, three-way valve) that can adjust coolant flow paths based on real-time temperature and charging power conditions. The system can dynamically switch between different cooling modes (battery cooling only, coolant cooling only, or both simultaneously), enabling adaptation to varying heat dissipation requirements as charging power changes.
3Reliability
If coolant storage tank is equipped in charging pile, then coolant supplementation is enabled, but system complexity increases
Solution Approach 1:
The charging pile merges the coolant storage tank with the existing thermal management system structure. The storage tank is integrated into the coolant circulation pathway, connecting to the first heat exchanger and coolant channels. This merging approach enables coolant supplementation functionality without requiring a completely separate system, reducing overall complexity compared to having independent backup cooling systems.
Solution Approach 2:
The system enables self-service coolant supplementation where the charging pile automatically detects coolant levels and replenishes coolant from its storage tank when the vehicle's coolant is insufficient. The control unit monitors coolant status and automatically activates the supplementation function through the coolant channels, eliminating the need for manual intervention or external service visits for routine coolant top-ups.
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 effectively manages heat dissipation during high-power charging, improving efficiency and safety while simplifying coolant supplementation, ensuring reliable and timely coolant supply to the vehicle.
Implementation Method 1
a first heat exchanger (522)... the first heat exchanger includes a coolant channel (5221)... the coolant channel is configured to perform heat exchange with the power battery
Implementation Method 2
the coolant channel (5221)... configured to perform heat exchange with the power battery
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
This application provides a charging pile (510) and a liquid cooling device (520). The charging pile (510) includes a charging connector (511), a coolant storage tank (521), a first heat exchanger (522), a coolant discharge channel (5231), a coolant return channel (5232), a heat dissipation channel (M1), and a coolant supplement channel (M2). The charging connector (511) is configured to output electric energy to an electric vehicle (400). The charging pile (510) is configured to: when the coolant discharge channel (5231) and the coolant return channel (5232) are connected to the electric vehicle (400), and a heat dissipation request packet sent by the electric vehicle is received, connect the heat dissipation channel (M1). The heat dissipation channel (M1) is configured to deliver, to the electric vehicle (400) through the coolant discharge channel (5231), a coolant flowing out of the first heat exchanger (522), and deliver, to the first heat exchanger (522) through the coolant return channel (5232), a coolant flowing out of the electric vehicle (400), so that the charging pile (510) dissipates heat for a power battery (411) of the electric vehicle (400). The charging pile (510) is further configured to: when the coolant discharge channel (5231) is connected to the electric vehicle (400), and a coolant supplement request packet sent by the electric vehicle is received, connect the coolant supplement channel (M2). The coolant supplement channel (M2) is configured to deliver, to the electric vehicle (400) through the coolant discharge channel (5231), a coolant flowing out of the coolant storage tank (521), so that the charging pile (510) supplements a coolant storage tank (430) of the electric vehicle with the coolant.