The programming port is I2C\SMBus, so with USB-I2C adapter (CP2112, on example) , on example, you can read a battery info (cycles count, capacity, etc).
@@mysticman0628 The SMBus protocol (over I2C :) ) is used in many "smart" batteries (such as laptop batteries, for example). To read data from a battery that supports SMBus monitoring \ programming, you can use an inexpensive USB-SMBus adapter (search for "CP2112 USB adapter" on Google) and software (search for "CP2112-Laptop-Battery-Reader" on Google - it's open-source software written in C++, Qt). Regarding the connection, there’s a small black connector on the battery board. That’s what you need :) There are test points (GND, SDA, SCL) on the board that lead to the small black connector.
Hi Adam thanks for the video. It looks my batteries are good something should wrong with the bms board. All my batteries has got around 4.1 V. Where did you get your New BMS board?
It might be same situation as I have spotted in jet bot battery, replaced all cells but somehow BMS was locked ;/ If yes, I was very lucky in this video...
@@HobbyWithAdam There is another video on youtube where some chinese guy is changing elements in this battery, he has extra wires soldered to the battery so the board never loses electricity while removing elements. Seems he does it like that to prevent locking the battery. So basically the safest way to replace a cell would be soldering another cell and then remove and replace the bad cell. ruclips.net/video/7P16NXYoluw/видео.html
Have just done the same thing. Found 1 x 21700 in the middle (on the connector side) was faulty. below 0.1V and no resistance. Replaced and charged each cell in the pack individually and now seeing full voltage across the 6S1P pack. BMS is still giving the 3 flashing lights when tried to be used. Suspect BMS fault also?
This just happened to me as well - while detaching the old cells at some point the circuit started ticking like a bomb. After a minute or so it stopped, and then poof, bricked BMS. I got so mad I hardwired the battery pack to the P+ and P- terminals and hooked it up to the vacuum, and surprisingly it started up immediately. Speed adjustment also works fine, although the power button does not work, I think all it does is ask the battery circuitry to toggle power via the middle pin. I’m very tempted to buy a cheap 40A bms off Amazon and replace the original circuit.
Thats weird, my jet 75 vacuum battery is VCA-SBTA60, it has only 38,88Wh and 1,8Ah, i wonder if i could also use that you got there, it seems a lot bigger capacity. Mine drains quite quickly.
@@HobbyWithAdam chat GPT told me they are compatible...exactly same size, only difference is capacity 🙂 Some sites also show that sbta90 fits jet 75...so it probably is true.
The programming port is I2C\SMBus, so with USB-I2C adapter (CP2112, on example) , on example, you can read a battery info (cycles count, capacity, etc).
Can you describe it a little bit more? Where and how you are plug it, and how you can read this info out?
@@mysticman0628
The SMBus protocol (over I2C :) ) is used in many "smart" batteries (such as laptop batteries, for example).
To read data from a battery that supports SMBus monitoring \ programming, you can use an inexpensive USB-SMBus adapter (search for "CP2112 USB adapter" on Google) and software (search for "CP2112-Laptop-Battery-Reader" on Google - it's open-source software written in C++, Qt).
Regarding the connection, there’s a small black connector on the battery board. That’s what you need :) There are test points (GND, SDA, SCL) on the board that lead to the small black connector.
Hi Adam thanks for the video. It looks my batteries are good something should wrong with the bms board. All my batteries has got around 4.1 V. Where did you get your New BMS board?
I bought another battery and was lucky enough that another battery had broken single cell but BMS board was fine :)
Ah ok thanks, I have to buy another one also.
If we are around 20$ for "dead" battery it's worth even just for cells only, 21700 3000mAh 35A would cost at least few $ each.@@mysticman0628
Does anyone know where to buy the bms circuit board ? I check the cells and they are good .
I couldn't find anywhere, but my old BMS is working after few days of disassemble @@JoseGomez-bd3db
I change bad cell , igot 25v but not working , i dont know why
It might be same situation as I have spotted in jet bot battery, replaced all cells but somehow BMS was locked ;/
If yes, I was very lucky in this video...
@@HobbyWithAdam i think bms lock , i try to use on jet90 but they not work just have led blink 2 time , do u know how to unlock bms bro?
@@HobbyWithAdam There is another video on youtube where some chinese guy is changing elements in this battery, he has extra wires soldered to the battery so the board never loses electricity while removing elements. Seems he does it like that to prevent locking the battery. So basically the safest way to replace a cell would be soldering another cell and then remove and replace the bad cell. ruclips.net/video/7P16NXYoluw/видео.html
Have just done the same thing. Found 1 x 21700 in the middle (on the connector side) was faulty. below 0.1V and no resistance. Replaced and charged each cell in the pack individually and now seeing full voltage across the 6S1P pack. BMS is still giving the 3 flashing lights when tried to be used. Suspect BMS fault also?
This just happened to me as well - while detaching the old cells at some point the circuit started ticking like a bomb. After a minute or so it stopped, and then poof, bricked BMS.
I got so mad I hardwired the battery pack to the P+ and P- terminals and hooked it up to the vacuum, and surprisingly it started up immediately. Speed adjustment also works fine, although the power button does not work, I think all it does is ask the battery circuitry to toggle power via the middle pin.
I’m very tempted to buy a cheap 40A bms off Amazon and replace the original circuit.
I also need to change the battery cells. Can I use INR-21700-P42A instead of these cells?
INR-21700-P42A 45A discharge rate is more than enough ;)
factory samsung 21700-30t has 35A discharge
Thats weird, my jet 75 vacuum battery is VCA-SBTA60, it has only 38,88Wh and 1,8Ah, i wonder if i could also use that you got there, it seems a lot bigger capacity. Mine drains quite quickly.
looks very similar, It might work, I would give a try somewhere with free return option
@@HobbyWithAdam chat GPT told me they are compatible...exactly same size, only difference is capacity 🙂 Some sites also show that sbta90 fits jet 75...so it probably is true.
Hello
Witam mam pytanie odnosnie bateriii od samsung jet 75