Battery thermal management system for hybrid power vehicle model

Abstract

The invention discloses a battery thermal management system for a hybrid power vehicle model. The battery thermal management system comprises an electric heater, an electronic water pump A, an electronic water pump B, a water temperature sensor A, a water temperature sensor B, a water temperature sensor C, a battery pack, a PEU, a battery cooler, an expansion water tank, a three-way valve A, a three-way valve B, a three-way valve C, a three-way valve D, a three-way magnetic valve a, a three-way magnetic valve b, a two-way magnetic valve, a hot air radiator, an engine water jacket, a refrigerant loop and a water pipe, wherein the hot air radiator is integrated into an air conditioning box, the refrigerant loop is connected with the battery cooler, and all components are connected through the water pipe. By means of the battery thermal management system, the electric heater can be shared in the battery pack and a passenger compartment; the magnetic valves are reasonably arranged in the loop, and the good logic control mode is adopted, so that the heating requirements of the battery pack and the passenger compartment are met; a heat exchange is conducted only between a circulating medium and the electric heater or the cooler; the flow path is shortened, the target temperature is reached rapidly, and the energy consumption of an electric compressor and the electric heater is saved;and the cruising mileage of a complete vehicle is increased.

Description

technical field [0001] The invention relates to the field of hybrid vehicles, in particular to a battery thermal management system applied to hybrid vehicles. Background technique [0002] As people pay more and more attention to environmental protection and the global energy shortage, major car companies are gradually increasing the layout of new energy vehicles, and more and more new energy vehicles are appearing in our lives. Compared with pure electric vehicles, plug-in hybrid electric vehicles use two power systems of motor and engine, which can not only reduce energy consumption, but also ensure unrestricted driving performance. It is currently the most ideal solution to replace traditional internal combustion engine vehicles. Plug-in hybrid electric vehicles are based on traditional internal combustion engine vehicles with additional components such as drive motors, battery packs, and chargers. The performance of the battery pack determines the driving performance, sa...

AI Technical Summary

Problems solved by technology

However, the fuel heater used in its preheating system generally requires special oil pumps, oil delivery pipes, intake pipes, air filters, exhaust pipes, and exhaust mufflers, which makes the system complex and poor in control stability.

Another example is CN 106898841 A, which describes a battery pack thermal management system for hybrid electric vehicles (battery pack water cooling and water heating scheme), which uses an independent electric heater circulation loop to heat the battery pack. From the analysis of the circuit principle, the passenger compartment should adopt If other heating circuit designs are used, it can be seen that two sets of heating circuits increase the cost and weight of the vehicle; the battery cooler and electric heater are connected in series in the same circuit, resulting in a large circuit flow resistance, and high power is required. The electronic water pump provides a larger head and flow rate. In addition, because the circuit is designed in series, when the battery pack needs to be cooled or heated, the battery cooler and electric heater need to cool or heat more circuit media, and the time to reach the target temperature Longer, the working time of the electric compressor or electric heater is longer and the power consumption increases, which affects the energy consumption and cruising range of the whole vehicle

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