We are finishing developing and prototyping the new control circuit for EV heater. We have included many new functions and fixed some bugs, that were found within the v.1 version. We used much more advanced microcontroller, which enables lots of functions as well as user programmable parameters. Most of the circuit is build in SMD technology which is more robust for mehanical vibrations and easier for machine soldering. Well – and with all the components required for full functionality and request, that it should fit into the old housing – there’s no other way. Classical elements are MUCH bigger …

V.2 control circuit ensures:

• Automatic PWM heat adjusting within the range 50-200 V DC (depends on built-in heater elements), where the heating power remains constant, regardless of the system voltage.
• Automatic shutdown, when system voltage drops under pre-programmed voltage limit.
• Safety float switch input, which shuts down the heater in case that water level drops bellow safe level.
• Multicolor LED for displaying system statusand possible errors  (green: power ok, amber: heater on, red: error (different blinking for different errors).
• User can adjust temperature in the range between 40 and 80 degrees Celsius. Default temperature is 70 degrees, however user can simply adjust the water temperature and save the electrical power, if higher temperature is not needed (for example in spring or autmn, where heating is mostly used for de-fogging the glasses, but not for real heating the vehicle).
• MultiConn connector enables connecting several peripheral components to the system: programming interface for adjusting heater’s parameters (such as power, low voltage limit …) and system maintenance, adjustable resistor for adjusting water temperature, LED diodes for monitoring heater’s state (power ok/heating/error/…)
• Simple mounting using M6 screws for fixing cable terminals and M4 screws to mount the board.

For more information contact us at info@ecat.si!