Csaba Zagoni
New Member
- Joined
- Jan 6, 2022
- Messages
- 2
Hello, this is my first post on this forum. I'm from Romania, so I apologize for my sometimes bad English.
I just purchased a Gen 3 plug in Prius, and thinking about building a battery pack with the BYD blade cells to match the voltage of the Li-ion battery that is already in the car.
The Li-ion pack is 4 stacks in series of 14 cells 20Ah each, totaling 4*14*3.7=207.2V and around 4 kwh.
The pack I want to build would be:
Variant A: 4 stack of 16 cells 138Ah each totalling 4*16*3.2=204.8 V and around 28 kwh. Each stack with own BMS
Variant B: 2 stack of 32 cells 138Ah each totalling 2*32*3.2=204.8 V and around 28 kwh. Each stack with own BMS
I figure if I match the voltage before I conect them in paralel than the 2 batteries should work fine.
What I don't know if the Prius measures the voltage on the DC bus and works in EV mode until the voltage drops to a certain level, or measures the battery pack cells directly. Even than it should work because the voltage in the original battery will drop only when the voltage in the extension battery drops also.
So the range will be displayed wrong, but the car should be able to EV only mode for more than 100 km. Charging will be also like 13 hours, but can be done at night with no problem, and probably won't be necesary every day.
Before I start sourcing the parts, I ordered ODB2 interface so I can monitor for a while the voltage values at cell level and pack level.
What are your thoughts on this. Is it doable without interfering in the CAN comunication, can it work?
What pc software do you recomend to diagnose the car, that can see the battery data as well?
I just purchased a Gen 3 plug in Prius, and thinking about building a battery pack with the BYD blade cells to match the voltage of the Li-ion battery that is already in the car.
The Li-ion pack is 4 stacks in series of 14 cells 20Ah each, totaling 4*14*3.7=207.2V and around 4 kwh.
The pack I want to build would be:
Variant A: 4 stack of 16 cells 138Ah each totalling 4*16*3.2=204.8 V and around 28 kwh. Each stack with own BMS
Variant B: 2 stack of 32 cells 138Ah each totalling 2*32*3.2=204.8 V and around 28 kwh. Each stack with own BMS
I figure if I match the voltage before I conect them in paralel than the 2 batteries should work fine.
What I don't know if the Prius measures the voltage on the DC bus and works in EV mode until the voltage drops to a certain level, or measures the battery pack cells directly. Even than it should work because the voltage in the original battery will drop only when the voltage in the extension battery drops also.
So the range will be displayed wrong, but the car should be able to EV only mode for more than 100 km. Charging will be also like 13 hours, but can be done at night with no problem, and probably won't be necesary every day.
Before I start sourcing the parts, I ordered ODB2 interface so I can monitor for a while the voltage values at cell level and pack level.
What are your thoughts on this. Is it doable without interfering in the CAN comunication, can it work?
What pc software do you recomend to diagnose the car, that can see the battery data as well?