Thats the wrong type of Prius battery, you want 2015 onwards Li-ion, Using the nickel metal hydride cells is a pita as you rightly said.

you should look up the IC's datasheets until you find something like a DC Voltage Isolation Sensor it will likely be connected to a long string of resistors, I can see several likely candidates on that board.

It makes sense now, you are building a hybrid so you want the highest C rate for both charging and discharging You will always need a BMS, you cannot skip this part no matter what anyone says, its asking for problems. There are a lot of hybrid packs out there, they are really cheap because no one kn...

as a rule of thumb as the cells get smaller the C rating gets higher and vice versa, with the slight exception of the new tesla cells which have different cell termination, this is why I think you see such low C rating for LFP chemistry because they are designed for energy storage, if you had a 280a...

Bexanders BMS should work with your pack have a look on the forum for it.

You explained it pretty well yourself, the LFP batteries that are sold with low C are designed for solar, generally LFP have high C rating compared with Li-Ion especially for charging, I may be wrong but i thought this was common knowledge? What LTO cells are you comparing the C rate with? the Toshi...

with no LFP that I can find able to deliver 8-10C, I'm left with Lithium Ion, and LTO. Sure, I am very surprised by that, LFP chemistries are well known for their high C rating, and you should be fine with the higher temps as long as your design is ok, they really struggle in low temperatures. Most...

The energy density of LTO is quite low, and I imagine the quality will vary quite a bit, would it not be just as easy to get LFP? You could probably find whole modules designed for EV conversions on there.

If these are like the eltek power chargers I have, they should be mounted to a cold plate (wc) or heat sink, do you have a model number for them?

These are just growing pains, as the chemistry and application progresses it will become safer, Look how far we have come in the last 10 years, the progress has been astounding, and they are competing with 100+ years of ICE technology. Saying all that it really is surprising that the battery packs a...

Im currently using a resistor divider on the 5v line to emulate a voltage, the inverter has an ACPL-C87AT DC Voltage Isolation
Sensor onboard and i can use that or a can bus value it transmits from it.

That worked well, the thermistor value is populated in the place that it should, but with extra 0 readings that i need to remove. Im having trouble with the contactors, your code originally read the precharge pin directly but as i am now using pwmWrite thats not possible so i changed that to checkvo...

Forget about using the buck / boost for traction purposes, you would get more power and efficiency with a single 300v battery, you would be limited to 30kw max at around 80% eff... is there any reason you need to use the 450h at 650v rather than 325v? You should get a good amount of power even at th...

650v is used by the 450h so it must be rated for higher than that https://openinverter.org/wiki/Lexus_GS4 ... 20the%20GS.

Im talking bout creepage distance between two conductors or any bare metal case etc.. you don't want a breakdown between two conductors and you want a margin of safety. The cable does matter, I would have thought you want minimum 1000v DC rating double insulated cable, if you are recycling parts fro...

its possible to use a contactor to split the pack into 2 and then use 2 separate chargers, you need to make sure your isolation clearance and cable rated voltages are enough.

There is a separate isolation detection module in the imiev and outlander phev, i don't know whether they are CAN based or outputs an analogue signal. EDIT, the detection module grounds the contactor so it should be relatively easy to use. http://mmc-manuals.ru/manuals/i-miev/online/Service_Manual/2...

Im trying to get the thermistor value into the existing cellblock temp in the code but i don't know where to call for it, I got it to read and serial print data in the loop so i know its working but I want to make use of the high and low cell functions to put in some hardware protections for high an...

The lack of a datasheet for the contactors is problematic. Doing some testing has left me wondering whether the contactors need PWM after all, it seems the hold off setting needs to be a lot higher than i have seen with other contactors. The contactors are driven from a BTS723GW on the existing PCB,...

Did you also implement PWM for economiser control of your contactors? you mind sharing your code for this? it may be easy for you, programming is not something I find easy. I have tried modifying the code to use an extra pin for the contactor and analogwrite with a delay going from value 255 then 50...

tidy setup, do you have contactor control on that board? I think this will need to be changed to reflect the number of modules and whether they are series / parallel if((batteryVoltage > 300) && (compareVoltage > batteryVoltage) && (millis() - lastMillisContactor > 500)) I also found...

RS232 gives inverted signals compared with TTL You can grab a couple of transistors and resistors create a transmit and receive inverting amplifier and connect it to the USB TTL and it will probably work just fine. I had exactly the same with my lebowski controller with the gibberish you describe on...

Thankyou for the clear explanation and help getting this up and running. I hopefully should be able to handle the coding for the additional contactor and economizer control myself. There are some thermistors in the pack in a couple of places handled directly by the micro on the BMS, im not sure how ...

"writeAllSlaves(0x1E, 0x0008, true); // Set TOPCELL, Top cell for measurement is 8" Yes i also changed this already to get it working. I dont have any temp sensors, will have a look at disabling them. how do i change the bits D12 and D13 in the mesureen value? I dont understand how to do t...

That was the same as before so i went looking to find where the measurement was failing, after pouring over the datasheet I set mesureeen to 0x11FF and i got this: 1: 3682 3683 3684 3684 3684 3684 3682 3684 20 2: 3684 3683 3685 3684 3683 3682 3685 3683 20 3: 3684 3684 3684 3684 3684 3683 3684 3684 2...