EV Battery Cooling Loop With Off-Vehicle Fast-Charge Heat Dissipation

The cooling system is segmented into in-vehicle and off-vehicle portions. The in-vehicle cooling loop handles normal operating temperatures, while the off-vehicle liquid cooling device handles high-power fast charging scenarios. This segmentation allows each subsystem to be optimized for its specific operating range, enabling high charging speeds without excessive heat buildup.

The in-vehicle pipeline is designed with multi-functionality to connect different cooling loops. It can switch between connecting the heat exchanger to the liquid cooling runner (in-vehicle loop) and connecting the coolant injection/discharge channels to the off-vehicle liquid cooling device (off-vehicle loop). This universal design allows the system to adapt to different charging power levels and heat dissipation requirements.

The system merges the in-vehicle cooling loop and off-vehicle liquid cooling device into a unified thermal management system. The in-vehicle pipeline serves as the connecting infrastructure that allows both cooling loops to operate independently or in combination. This merging enables the system to achieve high heat dissipation capability during high-power fast charging while maintaining relatively simple architecture during normal operation.

The cooling system is designed to be dynamic, allowing switching between different operating modes. The in-vehicle pipeline can dynamically connect different components based on charging requirements. During normal charging, only the in-vehicle loop operates. During high-power fast charging, the system dynamically engages the off-vehicle liquid cooling device through the injection and discharge channels, providing adaptive heat dissipation capability.

The off-vehicle liquid cooling device acts as an intermediary coolant reservoir and cooling source. Instead of increasing the in-vehicle coolant storage tank capacity, the system uses the external cooling device's coolant supply as a mediator to provide additional coolant during high-power fast charging. This approach improves coolant availability without increasing vehicle volume.

The system transitions from a purely in-vehicle coolant storage solution to a hybrid solution that extends into the external dimension. The off-vehicle liquid cooling device provides coolant supplementation from outside the vehicle, effectively adding a spatial dimension to the coolant supply system. This allows the vehicle to access additional coolant resources without increasing its own volume.