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New EnergyVehicle Air Conditioning System

High Voltage PTC Electric Heater

PTC is a semiconductor heating ceramic heater. The resistance value of PTC heater will increase step by step along with the increase of the temperature when the thermal resistor is over a certain temperature. The change of thermal resistor body temperature can be obtained through the current of PTC thermal resistor.

The uses of air conditionings in electric vehicles and other new energy vehicles will lead to a substantial decline in endurance distance. In the past, gasoline cars can use the residual heat of engines, but the electric vehicles and other new energy vehicles haven't engines or have less residual heat. Therefore, PTC electric heater is adopted to solve the problem. It is mainly used in the fields of wind heating, water heating, power battery heating, seat heating, rearview mirror defrosting, etc.

Development Direction

At present, the domestic and foreign new energy automobile enterprises generally use electric heater PTC module. In the next five years, along with the fast development of new energy automobile market, PTC electrical heating will become an indispensable and essential component of thermal management system of pure electric, hybrid electric vehicles and other new energy vehicles.

MIRALLON · Advantages

At present, all suppliers of high voltage PTC are foreign enterprises.
The Domestic traditional enterprises have not developed this product, and the failure rate of the imported goods is 1/100000.
There are only three to four companies whose domestic parts can reach the failure rate of 1/1000.
At present, MIRALLON is leading position in PTC research and development in domestic, and has mastered the core technology in this field.
The failure rate of the product is controlled within 1/10000.
The future innovations will focus on platform upgrades, product manufacturing, efficiencies and costs.

Schematicdiagram

Structure diagram

Main Control Chip Unit	Isolated Power Unit	Voltage Sampling Unit
Power Conversion Unit	Electronic Switch Unit	Temperature Sampling Unit
LIN Communication Unit	Current Sampling Unit	Fuse

Major Chip Manufacturers

NXP	Power Intigration	NXP
Infenion	Infenion	Allgro
ST	Eocos	Littelf use

Main Functions

Current Overshoot Protection	Power Adjustment	Short circuit Protection
Overvoltage Protection	Under-Voltage Protection	Disconnection Protection
Overcurrent Protection	Over-Temperature Protection