Precautions for PTC heating elements of electric vehicles:
1. After the liquid is dried, the PTC heater will not be damaged.
2. If the PTC heating plate is used to heat the cool air, the PTC heating plate will not be damaged when the air is not supplied.
3. The service life is long, and the service life can reach more than 10 years when used in a normal environment.
4. Reliable operation, using the internal characteristics of the PTC heating plate to control the temperature, and will not over-temperature.
5. The operating voltage is very wide: when the operating voltage changes twice, the change in surface temperature is very small.
6. When multiple PTC heaters are used together, they should be connected in parallel, not in series.
7. Different heat dissipation conditions make the heating power of PTC heaters vary greatly.
8. The heating power increases from large to small after power-on, and finally stabilizes. The stable power is related to the operating conditions. If the operating conditions of the same PTC heater are different, the power may differ by several times. The faster the heat dissipation, the greater the stable power; the higher the surface temperature of the PTC, the higher the power.
9. The surface temperature of the PTC heating element is controlled by the PTC itself, and can also be controlled by disconnecting the circuit, but it cannot be controlled by the regulated voltage.
10. PTC itself has high reliability and long lifespan, but if it is installed improperly, the product will show signs of unstable power and temperature.
11. When multiple PTCs are used together, they should be connected in parallel, not in series.
Hybrid vehicles and electric vehicles frequently run in high-efficiency areas due to their engines. When the engine cannot be used as a heat source under pure electric drive, the vehicle will have no heat source. Especially for the temperature adjustment of the cab, an additional heat source is needed to ensure comfort and safety. In order to maximize the driving range of electric drive and improve fuel efficiency, it is necessary to generate heat quickly, efficiently and safely with the least power consumption of the power battery. Webasto has developed a new type of high-voltage heater based on a patented new thermal layer technology. Introduced the design concept and R&D results to achieve the project goals.
Keywords: power battery, PTC heater, waste heat utilization
Preface
The trend towards electric drives and electric powertrains in the automotive industry has given birth to a wide variety of vehicle concepts. From mild hybrids to full hybrids, range extenders and pure electric vehicles, the degree of electrification is gradually increasing, while the application of internal combustion engines is declining. With the continuous optimization of engines, the introduction of advanced control strategies, and more and more electric driving, the waste heat generated by the engine or other devices leads to insufficient heat that can be used for temperature adjustment of the cab or power battery.