A carbon dioxide system with cooling/heating/auxiliary battery pack cooling functions

Abstract

The invention discloses a carbon dioxide system with refrigerating / heating / auxiliary battery pack heat dissipation functions. The system can realize three functions such as a battery pack heat dissipation function in a summer refrigerating mode, a battery pack heat dissipation and waste heat utilization function in a winter heating mode and an emergency cooling and heat dissipation function in a rapid battery charging mode. Therefore, regardless of severe road condition environment in which a new energy automobile runs, the temperature of the battery is always maintained in a reasonable fluctuation range, the charging and discharging efficiency of the battery is improved, and the service life is prolonged, so that the traveled distance of the new energy automobile is further greatly improved. In the winter heating mode, by utilizing waste heat assisted heating of the battery pack, the heating performance of the system is improved, environmental protection is realized, the energy is saved, and the current trend and requirement of green development can be met. More importantly, the battery heat dissipation of the rapid charging mode is further considered, and the problem that the battery temperature field is rapidly deteriorated during rapid charging is solved.

Description

technical field [0001] The invention belongs to the field of transcritical carbon dioxide systems, in particular to a carbon dioxide system for new energy vehicles with cooling / heating / auxiliary battery pack cooling functions. Background technique [0002] New energy vehicles overcome the dependence on fossil fuels of fuel vehicles, with diversified energy utilization, quietness and environmental protection, representing the trend of future automobile development. In the high temperature environment in summer, the temperature inside the new energy vehicle compartment is too high, so the car air conditioner is required to cool the air temperature in the compartment to the comfort level; in winter heating, since the pure new energy vehicle has no engine waste heat to Therefore, at present, pure new energy vehicles basically use PTC electric heating for heating in winter. However, the battery storage capacity of pure new energy vehicles is limited, and the use of electric heati...

AI Technical Summary

Problems solved by technology

The existing air-conditioning system for new energy vehicles lacks thermal management for the battery of new energy vehicles, resulting in the long-term driving of new energy vehicles in an extremely unstable environment, and the battery pack works in a harsh thermal environment for a long time, shortening the The service life of the battery reduces the performance of the battery, and the charging and discharging performance of the battery is damaged with the heating of the battery, which seriously affects the driving mileage of the new energy vehicle, and the long-term uneven distribution of the temperature field in the battery box will cause each battery A series of problems such as the unbalanced performance of modules and monomers have hindered the further development and popularization of new energy vehicles

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