Shared Air-Conditioning Loop For EV Battery And Cabin Heating
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Solution Overview
Problem
Electric vehicles face challenges in efficiently heating the passenger compartment and battery without reducing the vehicle's range, as existing solutions consume electrical energy or increase bulk and cost with the use of multiple heating devices and water circuits.
Innovation Solution
A heat conditioning system combining an air conditioning loop with an electric heating device that exchanges heat with the battery and passenger compartment, eliminating the need for a bulky water circuit and optimizing energy use by operating in recycling mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If electric heating devices are used to heat the battery and passenger compartment, then heating function is provided, but electrical energy consumption increases and vehicle range is reduced
Solution Approach 1:
The patent combines the battery heating function and passenger compartment heating function into a single integrated thermal management system. The air conditioning loop serves dual purposes: cooling the battery when needed and heating both the battery and passenger compartment when needed, eliminating the need for separate heating devices and reducing overall electrical energy consumption.
Solution Approach 2:
The air conditioning loop is designed to perform multiple functions: it can cool the battery during operation, heat the battery when temperature is low, and heat the passenger compartment. This multi-functional approach allows a single system to replace multiple dedicated heating devices, thereby reducing electrical energy consumption and extending vehicle range.
2Temperature
If a water circuit is added to transport heat from the air conditioning loop, then heating function is provided, but vehicle bulk and cost increase
Solution Approach 1:
The patent merges the heating function into the existing air conditioning loop by using the same coolant circulation system. Instead of adding a separate water circuit, the system uses the air conditioning loop's coolant to transport heat to both the battery and passenger compartment, thereby avoiding additional bulk and cost while maintaining heating capability.
3Loss of energy
If air conditioning loop operates in heat pump mode with outside air as heat source, then heating efficiency is improved, but icing problems occur at low temperatures
Solution Approach 1:
The patent uses the air conditioning loop's coolant as an intermediary to transfer heat from the battery to the passenger compartment. Instead of directly using outside air as the heat source (which causes icing), the system extracts heat from the battery through the coolant circulation, avoiding the icing problem while maintaining efficient heat transfer.
4Adaptability or versatility
If multiple heating devices are installed for battery and passenger compartment, then heating coverage is improved, but electrical energy consumption and vehicle weight increase
Solution Approach 1:
The patent designs a universal thermal management system where the air conditioning loop serves multiple heating functions. The same coolant circulation system provides heat to both the battery and passenger compartment, eliminating the need for multiple separate heating devices and thereby reducing vehicle weight while maintaining comprehensive heating coverage.
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 system reduces electrical consumption, maintains battery temperature stability, and provides comfortable passenger compartment heating while minimizing weight and cost, thereby extending the vehicle's range and battery lifespan.
Implementation Method 1
The heat conditioning system comprises an air conditioning loop in which a coolant circulates and comprises a compressor, at least two heat exchangers and at least one decompression device
Implementation Method 2
The heat treatment means exchanges heat with the air conditioning loop
Implementation Method 3
an air conditioning loop in which a coolant circulates and comprising a compressor
Implementation Method 4
at least one decompression device
Implementation Method 5
at least two heat exchangers
Data Source
AI summary
The present invention relates to a heat conditioning system for a motor vehicle, including: an air conditioning loop of a motor vehicle (B) in which a cooling fluid circulates and which includes a compressor (2), at least two heat exchangers (8,42) and at least one decompression device (24,26), a heat processing unit (U) of a battery (100) of the vehicle, which unit includes a heat processing means (46) which is capable of being in a heat exchange relation with the battery of the vehicle, in which the heat processing means is in a heat exchange relation with the air conditioning loop.