Thermal management of new energy vehicles
Release time:
2024-06-03
Several Typical Air Conditioning Systems for Electric Vehicles
| Air conditioning system form | Advantages | Disadvantages |
| Single cooling system + PTC electric heating | The structure is simple, the air conditioning system on the fuel vehicle can be used, and the portability is strong | Low efficiency, great impact on cruising range |
| heat pump system | High efficiency, energy saving compared to PTC auxiliary heating system | Low temperature environment performance can not meet the demand for heating |
| Jet-filled heat pump system | High efficiency, good low temperature heating performance | The cost is high, the system is complex, and the control technology requirements are high |
| Waste heat recovery heat pump system | High efficiency, energy saving | High cost, complex system, complex control system |
| Waste heat recovery heat pump system with compressor self-heating | Save PTC costs and expand system operation scope | High control technology requirements and high compression reliability requirements |
In addition, heat pumps are also classified as follows (from how to heat the passenger compartment)
Direct heat pump:
Advantages: Fast heating rate, relatively high COP
Disadvantages: If it is a high-pressure wind heating PTC, it has certain insulation safety requirements, large wind fluctuation and high NVH requirements. If it is a liquid-cooled battery board, a water circuit is still needed to ensure battery heating in winter, thus increasing the cost.
Indirect heat pump:
Advantages: The traditional air-conditioning box can be used, and the portability is strong; the battery and the air-conditioning system can be coupled for heating and the operation stability is good; there is no safety issue with high pressure in the cabin.
Disadvantages: The heating rate is slow at low temperature and requires PTC assistance; the cost of more water pumps and water valves; more heat loss, and the COP is relatively low; there are more operating restrictions in low temperature environments than direct heat pumps.
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