High Voltage Heater HVH 50/70 and HVH 100

The Future at Its Best: Innovative Heating Solution for E-Mobility

Powerful, Efficient, Fast

Webasto’s innovative technology works with an extremely thin heating layer that is firmly bonded onto

the heat exchanger, and a large contact area for heating the coolant. The HVH therefore achieves extremely

fast heat-up times, high precision and the highest efficiency. The system requires only a small installation

space and can easily be integrated into vehicles. Webasto’s proven technology is available in 3 variants

(maximum performance): HVH 50 (5 kW), HVH 70 (7 kW) and HVH 100 (10 kW).

These three words perfectly describe the electric High Voltage Heater (HVH).

It is the ideal heating system for plug-in hybrids and electric vehicles.

The HVH converts DC electric power into heat with practically no losses.

Technical advantages

�� Powerful and reliable heat output: fast and constant

comfort for the driver, passengers and battery systems�� Efficient and rapid performance: longer driving

experience without wasting energy�� Precise and stepless controllability: better performance

and optimized power management�� Fast and easy integration: easy control via LIN, PWM

or main switch, plug & play integration

General advantages

�� Reliable and certified safety: three mechanisms

to handle malfunctions and guarantee safety�� Immediate and long-time availability: core technology

produced in-house; no use of lead or rare earths�� Individual and global customer support: Webasto

worldwide network for consulting services and technical

support

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The Webasto Group is a global innovative systems partner to almost all automobile manufacturers

and among the top 100 suppliers in this industry sector. In its core business areas the company

develops and produces sunroofs, panorama roofs and convertible roofs as well as thermo systems

for all drive types. In addition, with battery systems and charging solutions Webasto is building up

a product portfolio for electromobility. In 2017 the Webasto Group generated sales of 3.5 billion

euros and has about 13,000 employees at more than 50 locations (with over 30 of these being

manufacturing plants). The headquarters of the company, founded in 1901, is located in Stockdorf

near Munich (Germany). For more information please visit webasto-comfort.com

Gilching Headquarters Webasto Locations

Webasto Thermo & Comfort SE Postfach 1410 82199 Gilching Deutschland webasto.com

Bus DefenseOff-Highway Special VehiclesLight Vehicles RailTruckCar

HVH development & testing�� Webasto layer technology safeguards a homogenous

heat distribution�� Widest heat exchange surface ensures a fast heat-up

Webasto production site in Germany�� Thermal spraying process and specific surface treatment�� Clean production processes in continuously

monitored chambers�� 100% end-of-line test

Note: Not all products are available in every country.

Diagnosis Function

Profound global support for individual applications

Wide range of original Webasto parts for HVH installations with the guaranteed high quality standard

�� Almost 100% heat output�� Heat output independent of coolant medium temperature and operating voltage

�� Seamlessly, quickly and precisely controllable

�� No inrush current or peaks

�� Rapid performance �� Direct, fast heat transfer

�� 3-dimensional safety concept�� Compliance with international vehicle standards

Installation parts

Application benefits

Integration

Webasto HVH

Webasto technology vs. PTC technology

Powerful Means ”Reliable and Constant Comfort“ for You

The heating layer of the HVH is rapidly and precisely adjustable. It avoids interfering short-term power spikes and converts

them directly into heat – a clear advantage over PTC heaters. The power of the HVH is constant and independent of the coolant

temperature or operating voltage.

Efficient Means ”Fastest and Constant Comfort“ for You

Webasto‘s layer technology consists of a thin heating layer that is bonded directly to the heating element.

Direct heat transfer in combination with the wide heating surface guarantees fast heat-up times coupled

with the highest efficiency and precision. It also enables the best and most gentle conditioning of the vehicle’s

high voltage battery.

The HVH can be controlled seamlessly (50 / 100 W steps). Almoust no energy is wasted. It can achieve full performance

immediately; for you, this means extremely fast heat-up of the coolant and thus best comfort. Furthermore, the heat output of

the HVH can be controlled exactly as needed – which brings a fast heat-up for passengers and gentle conditioning of battery

systems. Last, but not least, the HVH does not produce inrush current and supports thus a stable system – no peaks will occur

which may damage other electrical components. The battery lifetime is therefore increased thanks to best operating conditions.

Direct and fast heat transfer due to technology

Precise Means „Seamless, Quick and Flexible Comfort“ for You

Fully linear heat output control

Heat output relative to operating voltage

For us, safety is key. We have integrated multilevel, redundant safety measures in the design of the hardware and software

as well as in the mechanism of the HVH. This allows us to avoid critical situations of the system. Thanks to the type approval and

CE conformity, Webasto HVH is compliant with the international vehicle standards.

Our worldwide network provides consulting services and technical support for your high voltage application. In addition,

Webasto offers a wide range of installation parts for easy integration of the HVH into the vehicle.

Electrical integration: High voltage plugs with different cable lengths and low voltage plug kit.

Mechanical integration: Brackets and screws.

Coolant integration: Coolant pumps of different performance ranges as well as hoses and clamps.

Safe Means ”Reliability at Any Time“ for You

Redundant safety measures�� Software design: SPICE Level 2 �� Hardware design: ISO26262

Sensors�� Coolant outlet temperature�� Coolant inlet temperature�� PCB temperature�� Overheating sensor�� High voltage current sensor

Further safety measures�� Galvanic separation between low voltage and high voltage�� Sensor layer monitoring the whole heat layer�� Additional switches to provide a redundant switch-off

Webasto technology�� Almost 100% heat output�� For complete coolant medium

temperature range�� Independent of voltage level

PTC technology�� Loss of heat output�� At higher coolant medium temperatures�� At higher voltage levels

0 10 20 30 40 50 60 70 80 90 100

Demanded power (%)

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Heat output HVHHeat-up performance of HVH and PTC heater with 7 kW at -20 °C

Coolant medium temperature (°C)

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HVH 50 HVH 70 HVH 100

0 10 20 30 40 50 60 70 80 90

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PTCHVH

Power Precision

Efficiency Safety

450 V

350 V

300 V

250 V

HVH 50 HVH 70 HVH 100Performance (kW) up to 5 up to 7 up to 10

Operating voltage range (V) 100 – 450 100 – 450 250 – 870

Controllability steps (W) 50 100

Layer technology in series production since 2015 �� Heating layer is directly sprayed onto the heat exchanger�� Firmly bonded connection and thus no thermal losses

due to component boundaries

Low voltage area High voltage area

250 – 450 V

Coolant temperature HVH Coolant temperature PTC heaterPower HVH Power PTC heater