Electric vehicles use high power motors, with many various components and high heat generation, and the cabin structure is compact due to the shape and size, so the security and disaster prevention of electric vehicles is very important, so it is important to make reasonable design and layout of the thermal management system of electric vehicles. The article analyzes the cold and heat circulation system diagram of air conditioning, battery, motor and other components of an electric vehicle to build a set of the most efficient cold and heat circulation system model, and on this basis, the layout optimization design of related parts and pipes, etc., establishes a set of optimal pipe arrangement so as to reserve enough space for the luggage compartment.
In the arrangement of electric vehicle, the arrangement of hot and cold system is the key point, which is also the key difference between electric vehicle and traditional fuel car, the hot and cold related parts of electric vehicle are many, complex, and there are many pipelines, involving a series of parts such as electric vehicle controller, motor, PTC coolant heater and electric water pump, etc. Therefore, in the arrangement of the whole vehicle cabin and lower assembly, how to control the arrangement of parts in an integrated manner, and define the pipe mouth of parts is the key point of arrangement. This not only affects the performance of the whole vehicle, but also has an impact on each mechanism. The article is based on the arrangement of the hot and cold circulation system of an electric vehicle, combined with the study of the nacelle arrangement, the integration of certain related system components can reduce the bracket and related piping, control the cost, beautiful nacelle, save space, and facilitate the arrangement of related piping in the nacelle and lower body.
Thermal management differences between traditional cars and electric cars
The current fundamental changes in the power system of new energy vehicles, especially pure electric vehicles, are reshaping the thermal management system architecture of the vehicle, and the thermal management system has become the biggest difference between new energy vehicles compared to traditional vehicles, with the main differences being as follows:
(1) The new power battery thermal management system(HVCH) for new energy vehicles;
(2) Compared to the engine, the power battery and electric drive electronic control system require higher level and reliable temperature control;
(3) In order to improve the range, electric vehicles need to further improve the thermal management efficiency.
In summary, it can be seen that the traditional fuel car thermal management system is built around the engine (the engine drives the compressor, water pump operation, cabin heating from the engine waste heat). Because the pure electric vehicle does not have an engine, the air conditioning compressor and water pump need to be electrified and other means (PTC or heat pump) are used to produce heat for the cockpit. The power battery of new energy vehicles requires fine heat dissipation and heating management. Compared with fuel vehicles, new energy vehicles add thermal management circuits for the power battery and electronic control and motor, and increase heat exchangers, valve bodies, water pumps and PTCs.
Post time: Mar-23-2023
