Hi Robert,
I believe most of what you want is already built into OVMS through the Advanced Charge Control feature, at least for vehicles that have implemented a charge time predictor.
In OVMS v2 this was configured via text message. For example this command:
ACC PARAMS CHARGEBY 07:00 STOPSOC 60
tells OVMS that when plugged in at the current location, it should delay charging until charging to 60% state-of-charge will be achieved around 7:00 am.
As far as I know, there isn’t currently a notion of a minimum SOC that should be achieved ASAP upon plug in. I’m not sure that’s a big deal unless you regularly plug in with SOC below 10%. For example, the Tesla Roadster has a storage mode that holds charge at around 25% for long term storage.
There is a possible downside with using OVMS to limit the state of charge. Some electric vehicles, perhaps most, perform a pack leveling operation at the end of charging. If OVMS is used to stop charging early, that pack leveling will not happen.
Tom
I have an idea that will help prolong the life of EV batteries and maximise vehicle resale value.
In summary it involves implementing intelligent charging that keeps the battery at 50% (the best soc for long term storage) for as long a possible and minimises depth of charge and discharge. For example
· as soon as you get to a charge point (eg home or work), the OVMS will detect if it is below 50% and charge it until 50% is achieved
· the OVMS will be told the minimum required soc and when this should be achieved
· it will then wait until the last moment to start charging to achieving the required min soc
· a later version could receive a notification from your Google calendar with required mileage via IFTT, etc
Unfortunately, I don't have the coding skills to implement it but would be happy to do all the non-coding stuff like requirements, design, documentation, testing, etc.
If this sounds interesting and you would like to find out more please feel free to get back to me for a chat.