I’d like to share with you my future project, which is a portable battery, that connects in parallel with the hybrid system of a Prius HEV and transforms it in a plug-in hybrid without plug. Here is a list of the parts I believe are the best appropiate: Battery: 48v 40Ah / 80 Ah. Since I start cheap. I’ll go with 40Ah: High voltage EV Relay, activated by a switch in the dashboard: Avoids high voltage exposure when unplugging the battery and when the car is powered off. Inverter 48vDC to 240VAC 2500W: since there are no DC boost converters on the market with this requirements I believe an inverter will do. 5A 288v Charger Circuit is as follows: Battery is charged at home, brought to the car and hooked to the inverter. Inverter connected to the 288v charger and charger connected to the terminals of the Prius battery pack through HV relay and controlled through a switch in the dashboard This project will be applied in a Toyota Prius Gen3 and the purpose of this thread is to know your thoughts, pros and cons and difficulties I may encounter when I’ll assemble the whole thing, especially in the boost conversion part, where I have the biggest doubts. I will highly appreciate your comments and help. Thanks a lot and look forward to hear what you think. Aaron.
welcome! there have been a lot of failures in this arena, but one fella from france has done great things. i had to buy a premade plug in. all the best!
if you look at gen 2 mod forum on the main forums page, there is a plug in sub forum link just below it. scroll down the page and you will see a thread by member 'planetaire'.
I have no idea, but it is likely that it won't put 288V on the battery at once. When you try to charge a lead battery, it is no problem to use a 30V DC power supply because the battery voltage will slowly rise from wherever you start (11V or so) . You can always cut the power when the voltage gets too high. Not really sure how this works with NiMH batteries though. Also keep in mind that at 80% SOC, the battery is at 269V. If the relation between SOC and battery voltage is linear, than 288V would be 86,4% SOC. That's outside of the limits the Prius will let the battery go, but I would not put that so far outside of the limits that it would damage the battery. A battery at that SOC will probably be forcefully depleted by running the petrol engine. BTW: the official spec is 28x8.4V = 235.2V Disclaimer: This is all just reasoning. I have no deep knowledge of the Prius battery system.
