Water-heating-type high voltage heating system for new energy car

Abstract

The invention discloses a water-heating-type high voltage heating system for a new energy car. The water-heating-type high voltage heating system comprises a heat dissipater, and a heating element isarranged at the bottom of the heat dissipater, can heat circular cooling liquid located in the heat dissipater, and comprises a first insulating layer, a resistor heating layer, a second insulating layer, an electricity leaking detecting layer and a sealing layer. The side wall of the heat dissipater is provided with a liquid inlet pipe, a liquid outlet pipe and a high / low voltage inserting jointpiece, and a circular liquid flow pass is formed in the heat dissipater. The heating element of the heating system is composed of functional layers sequentially arranged at the bottom of the heat dissipater, the thickness is only 0.2-0.4 mm, nearly no consumption exists in conversion from electric energy to heat energy, the conversion speed is high, the conversion efficiency is high, a heat sourcewhich is rapid in reacting, short in starting time and reliable in continuity is provided for an air conditioner heating system, a defogging and defrosting system and a power battery heat-insulatingsystem, and a 180-450V direct-current high-voltage electricity vehicle-mounted electric system can be adopted for replacing a low-voltage vehicle-mounted electrical system; and electric power comes from power batteries, the current strength is lowered, and power and heat output is higher and more stable.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and relates to an electric heating system for new energy vehicles, in particular to a water-heated high-voltage electric heating system for new energy vehicles that provides heat sources for air-conditioning heating, defogging and defrosting, and power battery insulation systems system. Background technique [0002] At present, global energy and environmental issues are facing enormous challenges. As a major oil consumer and carbon dioxide emitter, automobiles need to undergo revolutionary changes. In order to reduce carbon dioxide emissions, the development of new energy vehicles has reached a global consensus. To step up the research and development of energy-saving vehicles and new energy vehicles, the "Energy-saving and New Energy Vehicle Industry Development Plan (2012-2020)" passed by the executive meeting of the State Council of my country pointed out that pure electric drive sh...

AI Technical Summary

Problems solved by technology

However, the charging performance of power batteries for new energy vehicles is poor when the ambient temperature is below 0°C. The lower the temperature, the more difficult it is to charge. Therefore, the battery needs to be heated above 0°C before charging.

[0004] At present, there are two main heating methods for new energy vehicles. One is to use PTC (Positive Temperature Coefficient, positive temperature coefficient) liquid electric radiator for heating. To increase the air temperature in the compartment, maintain the battery temperature or provide the required heat source for other applications, but the temperature characteristics of the PTC material make the resistance value increase with the temperature of the heating area, so that the heating power decreases under the same voltage condition The problem is that it cannot be heated with constant power, and the PTC radiator is prone to aging and performance attenuation. After the radiator has been running for a long time, the power output of the PTC heating element will be attenuated to a large extent, which affects its working efficiency. It is extremely unfavorable. In addition, the PTC electric heating element with a temperature control of about 120°C contains heavy metal lead, which is harmful to the environment and human health, and cannot meet the relevant environmental protection requirements.

[0005] Another heating method for new energy vehicles is heat pump heating, which refers to adding a solenoid valve mechanism to control the flow of refrigerant on the basis of the refrigeration circuit of the electric compressor, absorbing heat from the surrounding environment through the evaporative condenser, and condensing it inside The heater releases heat into the cabin to increase the temperature inside the cabin, meeting the needs of defogging and defrosting and providing a comfortable environment for the driver and passengers. However, in this heating method, electric compressors, internal condensers, evaporative condensers, The technology of core components such as solenoid valves for refrigeration pipelines is still immature, and the heat pump system has a complex structure and a large number of components, making the engine compartment difficult, heating costs are too high, and the development cycle is long. As the ambient temperature decreases, the energy efficiency ratio COP (cooling coefficient) value of the heat pump system will decrease, causing the heat pump heating method to be limited by the temperature range.

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