EV Coolant Circuit With Multi-Way Valve and Reversible Bypass Flow
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Solution Overview
Problem
Existing coolant systems for electric vehicles are complex and inefficient, requiring numerous components and valves to manage different operating states, which increases production costs and reduces system efficiency.
Innovation Solution
A coolant system utilizing a single multi-way valve and component bypass line, allowing coolant to flow in both directions, reducing the number of coolant lines and valves while enabling more complex operating modes with fewer components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple valves and coolant lines are used to manage different operating states, then the system can achieve various cooling modes, but the device complexity and production costs increase
Solution Approach 1:
The bypass line is designed to serve multiple functions: it can bypass the heat exchanger in normal cooling operation, enable direct coolant circulation during high-load conditions, and facilitate system purging operations. This single multi-functional bypass line replaces what would traditionally require multiple dedicated lines and valves for each function, thereby reducing overall system complexity while maintaining operational versatility
2Adaptability or versatility
If more components are added to the coolant system, then more operating states can be controlled, but the manufacturing precision and production efficiency decrease
Solution Approach 1:
The patent integrates the bypass line functionality directly into the existing coolant circuit architecture, merging what would traditionally be separate control mechanisms into a unified design. The bypass line is strategically positioned and configured to work with the existing pump and heat exchanger, eliminating the need for additional independent components and simplifying the manufacturing process while achieving multiple operating states
3Device complexity
If a single multi-way valve with bypass line is used, then the number of components is reduced, but the ease of operation may be affected
Solution Approach 1:
The bypass line is designed with passive flow characteristics that allow it to automatically respond to system conditions. The configuration enables coolant to naturally divert through the bypass when certain pressure or flow conditions are met, reducing the need for active control mechanisms and making the system easier to operate as it largely self-regulates based on operating conditions
Data Source
AI summary
A coolant system for an electric vehicle, comprising a plurality of components through which the coolant can flow. The components being interconnectable, via at least one valve and coolant lines, so as to conduct coolant. The at least one valve being designed as merely a single multi-way valve. A component bypass line of the coolant system being arranged with respect to at least one of the components through which the coolant flows such that this component is connectable to the multi-way valve so as to conduct coolant such that, in a first switching state of the multi-way valve, the coolant can flow both through the component bypass line in a first flow direction and through this component, and, in a second switching state of the multi-way valve, the coolant can flow through the component bypass line in a second flow direction opposite to the first flow direction.