The HVDC Relay, applied to an electric vehicle, is installed between the vehicle battery and the inverter to cut off the charge and to discharge the DC power of the battery. It is also used between the external charger and the vehicle battery.
What is HV contactor?
A high-voltage contactor, also called a high-voltage relay without distinction in the industry, is widely used in electric vehicles (EV) and hybrid electric vehicles (HEV). It is an electromechanical switching device with a coil to generate a magnetic force that mechanically operates an electric contact.
What are the components of an EV high-voltage battery?
High Voltage Components
- High Voltage Cabling.
- Heat Pump Assembly.
- Front Motor (Dual Motor vehicles only)
- High Voltage Battery.
- High Voltage Cabling.
- High Voltage Battery Service Panel.
- Rear Motor.
- High Voltage Busbars.
How are high-voltage circuits and components identified?
All high voltage components, or compartments that house high voltage components, are identified with a hazardous voltage label that generally incorporates a yellow triangle with a black thunderbolt, and warning text. If one or more such labels is present on a vehicle it has a high voltage electric drive system.
How do you stop a high-voltage circuit?
The high-voltage system is deactivated by first switching on the high-voltage system, ie putting it under high voltage (“KU 5 on”) . The motor vehicle or at least the high-voltage system is switched to the operating state by means of an “ignition key” or other starting device.
What are DC contactors?
A DC contactor is an electrically controlled device designed to switch current on and off. DC contactors control current in DC circuits by closing and opening internal contacts. DC contactors control much lower voltages than AC circuits and offer the benefit of minimal arcing as the circuit opens and closes.
Where are contactors used?
A contactor is a special type of relay used for switching an electrical circuit on or off. They are most commonly used with electric motors and lighting applications.
What is BEV architecture?
Battery Electric Vehicles (BEVs), compared to classic internal combustion engine (ICE) vehicles, are fairly simple and easy to operate. The simplest powertrain architecture consists in a high voltage battery, an electric motor with power electronics controller and a single speed gearbox.
Which vehicles use high-voltage battery?
Hybrid electric vehicles are powered by an internal combustion engine and an electric motor, which uses energy stored in batteries. A hybrid electric vehicle cannot be plugged in to charge the battery. Instead, the battery is charged through regenerative braking and by the internal combustion engine.
Why are EV batteries high-voltage?
A higher voltage system allows a lower current to be used when charging the battery, which reduces overheating and allows better power retention in the system. This power can be used towards a longer driving range. Higher voltage systems also offer a number of key weight- and mass-saving advantages.
What other systems may use high-voltage?
What Appliances Use a High-Voltage Connection?
- Heating & Cooling Equipment. Believe it or not, your air conditioner and heater may have a plug that it gets its electricity from.
- Electric Dryer.
- Electric Range/Oven Combos.
- Electric Vehicle Chargers.
How can you identify a high-voltage cable?
Manufacturers no longer exclusively identify high-voltage hybrid electric cables and connectors by the color orange. It is now possible to have high-voltage wiring color-coded orange, bright blue or even yellow.
What is high-voltage in vehicles?
In dry conditions, accidental contact with parts that are live at voltages above 110 Volts dc can be fatal. For E&HVs dc voltages between 60 and 1500 Volts are referred to as ‘high voltage’.
What isolation resistance are GM high voltage systems designed to have?
According to the FMVSS-305 specification the minimum isolation resistance barrier that must be maintained between the HV system and vehicle chassis is 500Ω/Volt (i.e., 500 ohms per volt).
What are the recommended items that should be used when working with the high voltage HV circuits of a hybrid electric vehicle?
Most EV manufacturers recommend that insulated rubber gloves should be worn when working near all high-voltage components, not just the vehicle batteries.
What systems use high voltage on a hybrid vehicle?
Systems for high-voltage electrical drives and hybrids
- Electronic engine control unit.
- Vehicle control unit.
- eAxle.
- Power electronics incl. DC/DC converter.
- E. Separate motor generator.
- F. 12 V battery.
- G. Internal combustion engine.
- H. Gearbox.
Where are DC contactors used?
DC contactors provide a cost-effective and reliable method to switch current in low-voltage DC circuits. Industries that use our DC contactors include (but are not limited to) agriculture & construction, lawn & garden, marine, mobile hydraulics, heavy trucks, and electric vehicles.
What is DC relay?
Direct current (DC) is steady and never reverses. A DC relay uses a single coil of wire wound around the iron core to make the electromagnet. When the DC coil is energized, the magnetism generated in the core is steady because the DC just keeps going.
What is the difference between a contactor and a relay?
A contactor joins 2 poles together, without a common circuit between them, while a relay has a common contact that connects to a neutral position. Additionally, contactors are commonly rated for up to 1000V, while relays are usually rated to only 250V.
What is NO and NC In contactor?
Normally open(NO) and Normally closed (NC) are terms used to define the states of switches, sensors or relay contacts under when its coil is not excited.
What is AC1 and AC3 contactor?
The difference between AC1 and AC3 contactors is AC1 contactors are used for general purpose resistive loads but AC3 contactors are used for high inductive, squirrel cage motor switching. The rating of AC3 is lower than AC1.
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