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Basic functions of HVDC Relay

Basic functions of HVDC Relay

  • Categories:Industry News
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  • Time of issue:2021-06-18
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(Summary description)As a key safety device in new energy vehicles-HVDC Relay, it needs to have the basic functions of high voltage resistance, load resistance, impact resistance, strong arc extinguishing ability and strong breaking ability.

Basic functions of HVDC Relay

(Summary description)As a key safety device in new energy vehicles-HVDC Relay, it needs to have the basic functions of high voltage resistance, load resistance, impact resistance, strong arc extinguishing ability and strong breaking ability.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-06-18
  • Views:0
Information

As a key safety device in new energy vehicles-HVDC Relay, it needs to have the basic functions of high voltage resistance, load resistance, impact resistance, strong arc extinguishing ability and strong breaking ability.

customized HVDC Relay supplier(s)
1. High pressure resistance
The working platform voltage of new energy electric vehicles is relatively high, much higher than the 12V/24V of traditional vehicles. Therefore, the supporting HVDC Relay is required to be able to withstand high working voltage and reliable closing and breaking during high-voltage loads.
2. Strong load resistance
The rated power of the electric motors of new energy passenger cars and buses is generally above 30KW and 80KW, and the peak value is above 60KW and 160KW. According to the voltage platform mentioned above, the current will reach about 200A and 300A respectively. In terms of product performance, Under the double pressure of cost, the product must have a strong load resistance capability under the same volume, and must have an instantaneous overload capability several times the rated load current; or under the same load resistance capability, the smaller the product, the better.
3. Impact resistance
The HVDC Relay for new energy vehicles must not only have the basic function of withstanding higher voltage and carrying sufficient current, but also resist the impact of the huge current of the capacitive load at the moment of closing. This current is generally several to tens of times the load rated current Etc., conventional relays cannot withstand the impact of this instantaneous current. The hazard of this impact current is that it is very easy to cause the relay contacts to stick, the relay contacts to separate and fail, the power supply is cut out of control, and it can cause car crashes and deaths in severe cases. The accident is extremely harmful. Therefore, HVDC Relay products for new energy vehicles should have good impact resistance.
4. Strong arc extinguishing ability
Arcing is an inevitable problem during the closing and breaking of HVDC Relay contacts. It greatly reduces the service life of the relay contacts. Some special rapid arc extinguishing methods are adopted to reduce the arc energy, reduce the damage to the relay contacts, and prolong the service life of the product. Therefore, strong arc extinguishing capability is also the basic feature of HVDC Relay.
5. Strong breaking capacity
The operating conditions of the automobile are complex during operation. In an emergency, such as a short circuit in the electrical system, the instantaneous current in the circuit rises sharply. At this time, the HVDC Relay is required to smoothly cut off the circuit under the limit high current without contact adhesion. Or the occurrence of abnormal conditions such as relay explosion, to prevent the safety hazards of battery over-discharge, short circuit, fire or explosion, which requires HVDC Relay contacts to have good impact resistance and anti-adhesion capabilities.

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