4-9KW 450-950V CAN/LIN Thick Film High Voltage Heater — Efficient Heating for EV

1、 Core Definition and Principles
Definition: Based on Thick Film Element (TFE) heating technology, a heating circuit is formed by printing and sintering resistance paste on the surface of a ceramic/metal substrate. After being powered on, the electrical energy is converted into heat energy through Joule effect, directly heating the coolant (ethylene glycol aqueous solution), and then circulating through the liquid circuit to supply heat to the battery and cabin.
2、 Working principle:
High voltage input: 400V/800V high voltage DC power supply;
Thick film heating: The resistance layer generates heat when electrified, with a thermal efficiency of ≥ 95%;
Liquid cooled heat exchange: heat is directly conducted to the coolant without any intermediate losses;
Intelligent temperature control: MCU+multi-sensor closed-loop control, power linearly adjustable.
3、 Core advantages (compared to traditional PTC heaters)
Efficient and energy-saving: thermal efficiency * * ≥ 95%, low temperature energy consumption reduced by 10% to 15%, and battery life increased by 5% to 8% * *.
Rapid response: low thermal inertia, full power output within 10 seconds, fast heating in extremely cold environments.
High voltage adaptation: Native support for 800V platform, meeting the thermal management needs of the fast charging era.
Long lifespan and high reliability: no mechanical contacts, resistant to cold and hot shocks, with a lifespan of over 15000 hours, suitable for a 15 year lifecycle of passenger cars.
Safety redundancy: Multiple overheat protection, high-voltage insulation monitoring, anti dry burn design, in compliance with vehicle ASIL-B.
Compact and lightweight: high power density, small size, light weight, suitable for small installation spaces in passenger cars
4、 Application scenario (core use of electric buses)
Battery thermal management (core):
Low temperature preheating: Quickly raise the battery to the optimal working temperature of * * 25 ℃ * * in a -20 ℃ environment, improving charging efficiency and extending lifespan.
High temperature heat dissipation: In conjunction with a heat sink, maintain a constant temperature of the battery between 25 ℃ and 35 ℃ to avoid thermal runaway.
Cabin heating: Rapid heating in extremely cold environments, defrosting and defogging to enhance passenger comfort.
System insulation: Low temperature preheating of high-voltage components such as motors, electronic controls, and DC/DC to reduce energy consumption and improve efficiency.
800V fast charging package: Control battery heat generation during fast charging to ensure safe and efficient fast charging.