EV heating element self-regulates, ensuring stability

12th February 2015
Posted By : Barney Scott
EV heating element self-regulates, ensuring stability

In contrast to traditional heating elements for conventional 12V onboard power supplies, TDK's recently-released EPCOS PTC heating elements are designed for the considerably higher voltages found in EV batteries. The rated voltages of these heating elements range from 200 to 500V, producing surface temperatures of up to 250°C. Depending on design, these heating elements are suitable for safe operation at up to 1000V.

Whereas cars with combustion engines can use waste heat for heating the passenger compartment, electric vehicles require electrical heating. In electroceramic components with Positive Temperature Coefficient (PTC) characteristics, the electrical resistance increases as a function of the rising temperature, creating a self-regulating effect.

The flow of current increases not only the temperature of these ceramic elements, but also their resistance, thereby limiting the current and establishing a stable equilibrium. Depending on customer requirements, the EPCOS PTC heating elements can be manufactured in a variety of geometries and with different electrical and thermal properties.


You must be logged in to comment

Write a comment

No comments




Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

Agile for Automotive 2019
15th May 2019
United States of America Detroit, MI
ELIV 2019
16th October 2019
Germany Bonn World Conference Center