How E-GMP handles 400V DC chargers

electriceddy

electriceddy

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A simplified explanation provided by HKtech @ Ioniq 5 forum (thank you):)
Boosting Voltage for 400V Chargers

Inverter as a Boost Converter:
In the event of a 400V DC fast charger, the E-GMP's inverter, which typically converts DC battery voltage to AC for the motor, assumes the role of a "boost converter."

Motor as a Reactor:
The vehicle's rear motor operates as a reactor within the boost converter circuit, facilitating the regulation of current flow.

Voltage Boosting:
Through this innovative utilization of the inverter and motor, the E-GMP platform effectively elevates the incoming 400V DC current to 800V DC.

Charging the Battery:
The amplified 800V current subsequently charges the 800V battery pack.

Trade-off for Using a 400V Charger:
While the E-GMP platform is compatible with 400V chargers, it is crucial to acknowledge that this process introduces an element of complexity and may result in a slight reduction in efficiency compared to direct 800V charging. The additional conversion step can potentially lead to some energy loss.
 
Will the Ioniq 5 be able to charge at more than 100 kw at Tesla superchargers that are version 3 and under when they are fully opened up to Hyundai in the future? I understand that they are limited now but will there be a fix?
 
Atlas23 said:
Will the Ioniq 5 be able to charge at more than 100 kw at Tesla superchargers that are version 3 and under when they are fully opened up to Hyundai in the future? I understand that they are limited now but will there be a fix?
Click to expand...
Even Cybertruck can't charge at full capacity on V3 equipment (limited to 250kW). V4 will be required to reach speeds of 350 kW , correct me if I am wrong but I believe currently only 3 are deployed.
 
Once the front propulsion axle receives a silicon carbide inverter like the rear-wheel-drive propulsion unit, there will be an increase from 100 kWh on 500V rapid DC chargers.
 
electriceddy said:
Even Cybertruck can't charge at full capacity on V3 equipment (limited to 250kW). V4 will be required to reach speeds of 350 kW , correct me if I am wrong but I believe currently only 3 are deployed.
Click to expand...
Tesla Cyberpunk HV DC pack is using additional contactors to split 800V pack to 400V pack and by doing this is able to charge at 500V rapid DC chargers at high speed.
They do have sacrifices on the engineering side because of additional contactors ( more resistance, possible heat build up), not even charge between two sides and additional stains on the cell voltage balance if they don't charge evenly.
 
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