Bidirectional Charging
Bidirectional charging means, that the car is able to provide power to the outside world, via the charge port.
Tags: bidi, inverse charging, vehicle-to-load, V2L, vehicle-to-home, V2H, vehicle-to-grid, V2G
https://openinverter.org/forum/viewtopic.php?t=5090
https://openinverter.org/forum/viewtopic.php?t=3551
Bidirectional Charging via AC
Some OEM on-board-chargers are able to create AC voltage. Todo: any reverse-engineering ongoing for such chargers? E.g. for Hyundai/Kia E-GMP?
Bidirectional Charging via CHAdeMO
The CHAdeMO standard was planned for supporting bidirectional power transfer from the beginning. Todo: Any open-source projects in this direction?
Bidirectional Charging via CCS
The CCS standard did not plan bidirectional power transfer. This means, depending on the implementation details of the cars charge controller, the car may or may not allow to draw energy out of the CCS port. Later versions of the CCS standard, ISO15118 (2020?), are defining special communication procedures for bidirectional power transfer. But it will take some time until this standard is widely adapted.
In the open-source world, however, we do not need to wait until OEMs and charger manufacturers implement the latest ISO15118. We can support bidirectional charging even with the "old" DIN spec. The strategy is: Even if the car is requesting to be charged, it also accepts discharging, without terminating the charging session. It may terminate if the SOC falls below a certain, configurable level, to prevent an empty battery. The car announces the allowed charge current, and the same value, just in opposite direction, can be used as a discharge current limit, too.
todo
References
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