VH battery amperage rate while acceleration (phev safe and easy. Mayby)

Hello. This is my first post. No, I don't own a prius. Because ready available models are not plug-in. I was figuring different approaches of phev'ing prius - from Engineer kit, to PriusPlius DIY. But they all have disadvantages. I had found some mentions of using additional prius HV battery in parallel. But they used complicated electronic and have a risk of overcharging, if charging in parallel.

So, I come to this simple solution, according to my knowledge of electronic:

Resistors to separate batteries then charging on line, and diodes to connect them then discharging. Also one diode, to regenerative charging. Such solution should maintain original bms on regeneration, and solve problem with charging from grid. That is more - if oem charging controllers could be used as bms for charging - it should have safety of original equipment.

Value of SOC should be fooled too, as in every phev conversion too.

So question is simple - does original battery give off 250 amps ? Ar more at full ev assist? (50kw/200 ~250 amps)

 

Thank you for an answer.

How then toyota claims of 50kw e-assist power using 125 amps fuse ?

I understood you arguing of parallel charging. and irony to not read of working designs. Now i try to find all info of stock battery ecu. Till now, i had found that it does need any info from other ecu to begin charging. Just present can connection.

So then - three oem battery with three battery ecu charged at home with three separate chargers could work ? And device to emulate can interface.

 

Now, i could not afford a new prius.

According to You - BOOST IPM is needed for charging ? But in my case, they will work only as charging current controller. BMS will be done by battery ecu. If I am right.

As far as I understood, CAN commands from battery ECU are decoded, and we need charging controller for each battery with can interface reading SOC and CCL at least.

 

I had read it before creating a new thread. And tried to contact with pEEf. Without success. Project from bristol show me an idea of using power from few parallel original prius packs. And how not to charge packs too.

pEEf way is superb. It could be affordable. But - i had build tens of different inventors. Some was my design. Some was copy-paste. They are easy in 100 watts range. But on 500 watts or more you need a lot of know-how to make it work, and even more know-how to make it bullet proof and suitable to work in a car environment. I always prefer KISS idea in any of my project. Not because I don't know how, but because I know - more complex system is always less reliable. Same is with BMS for lifepo4 cells.

I would try to explain ideas of project.

1. Use additional battery pack to store plug-in energy only. Not to recharge it. with existing bms to charge them propertly. (second batteries)
2. Use existing hv battery as is. And maybe charge it from mains too. (primary battery)
3. Use can device to spoof SOP ratio of primary battery.

1 - in theory is doable. I had graduated CS, i know how to work with CAN-bus, can bus commands for bms are known. To store more energy from braking, we will need bigger generators.
2 - solution is same as for first.
3 - it has been done before.

Adding second or third inventor would require also second/third mg2 with suitable controller.

That is all. It won't be full EV. And it would not be as power full as new prius.
It should be easy, safe by using existing bms, it should give adequate boost of energy.

Also - i had seen, report of ev regenerative braking. It increased range in ~10%. So if we have plug-in hybrid, we will not use capacity of bigger battery at regeneration at all. In my ~25 km work trip i have 10-20 stops in general. If i could gain 10% energy from braking, it means that i main pack would be charged for on 30%.