Traction Battery Cooling via Passenger AC Heat Exchanger
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Solution Overview
Problem
The integration of an air-conditioning system within the container of a traction battery in rail-bound vehicles increases costs and space requirements, particularly in scenarios where high ambient temperatures necessitate cooling of battery cells during charging and discharging processes.
Innovation Solution
A rail-bound vehicle with an energy storage device featuring a coolant circuit for cooling the traction battery, where the coolant circuit is coupled to the refrigerant circuit of an air-conditioning device through a heat exchanger, allowing the air-conditioning device to exclusively serve the passenger compartment, thereby eliminating the need for a separate air-conditioning system for the battery and optimizing space and cost efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an air-conditioning system is integrated in the container of the traction battery, then the battery cells can be cooled effectively, but costs and space requirements increase
Solution Approach 1:
The air-conditioning device is designed to serve dual functions: cooling the passenger compartment and cooling the traction battery through a heat exchanger coupled to the coolant circuit. This eliminates the need for a separate dedicated air-conditioning system for the battery, thereby reducing space requirements and costs while maintaining effective battery temperature control.
Solution Approach 2:
The patent merges the battery cooling function with the passenger compartment air-conditioning system by coupling the heat exchanger to the existing coolant circuit. This integration combines two separate cooling systems into one unified system, reducing overall space occupation and component redundancy.
2Temperature
If an air-conditioning system is integrated in the container of the traction battery, then the battery cells can be cooled effectively, but costs increase
Solution Approach 1:
The air-conditioning device is designed to serve dual functions: cooling the passenger compartment and cooling the traction battery through a heat exchanger coupled to the coolant circuit. This eliminates the need for a separate dedicated air-conditioning system for the battery, thereby reducing space requirements and costs while maintaining effective battery temperature control.
Solution Approach 2:
The patent merges the battery cooling function with the passenger compartment air-conditioning system by coupling the heat exchanger to the existing coolant circuit. This integration combines two separate cooling systems into one unified system, reducing overall space occupation and component redundancy.
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
This configuration reduces the space and cost requirements for cooling the traction battery while effectively managing temperature within the defined operating range, enhancing the operational efficiency and flexibility of the energy storage system.
Implementation Method 1
the air-conditioning device of the vehicle additionally has a heat exchanger, which couples the refrigerant circuit of the air-conditioning device to the coolant circuit of the cooling device of the energy storage device
Data Source
AI summary
A rail-bound vehicle includes an energy storage device having a traction battery and a cooling device for cooling the traction battery using a coolant circulating in at least one coolant circuit. The energy storage device supplies a traction device of the vehicle with electrical energy. At least one air-conditioning device air conditions a passenger compartment of a car of the vehicle using a refrigerant circulating in a refrigerant circuit, and a control device controls the air-conditioning device. The air-conditioning device has a heat exchanger coupling the refrigerant circuit of the air-conditioning device to the coolant circuit of the cooling device of the energy storage device. The control device controls a flow of the refrigerant through the heat exchanger. An energy storage device, an air-conditioning device, an arrangement for cooling a traction battery and a method for controlling the arrangement are also provided.