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Dyson v10 Battery repair / use alternative power tool batteries

christopher

I am having a really tough time figuring out how the dyson v10 battery bms system works...there is one connector that seems to send a digital signal to the motor letting it know that the battery is fine, or it is sent the opposite way. I am not rally sure how to approach finding out what this connector is used for by the vacuum although I know some people in china have figured out what it is used for because there are knockoff batteries made for it and 3rd party battery bms boards on aliexpress: BMS Battery Protection Board PCB Board for Dyson V10 US $291 sold+ Shipping: US $2.52US Electronic Technology Co.,LTD. If anyone has a place to recommend starting I would greatly appreaciate it. I recently purchased an oscilloscope: GWInstek GDS-1102B, but I am a noob so I am not sure how I should use it best.

Thanks in advance!

Christopher

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  • Hi Christopher, 

    I don't know about Dyson, but generally circuitry in battery packs perform several tasks, some health related, some monitoring related and some related to safety and some related to closed ecosystem like genuine Dyson batteries. The communication between battery and the rest of the device could be both-ways for some or all of these tasks. The closed ecosystem thing will almost definitely be two-ways, usually that involves a challenge and response mechanism, there's hard coded values and an algorithm buried inside chips designed not to be easy to replicate. If you want to see the communication you can try to look up the part numbers on the integrated circuits and find the datasheets, but they could be obscure parts or the datasheets may be restricted/partial, but you may get enough information that way to at least know what to probe, or you could just probe based on visual inspection, since ground is often easy to identify, and you can then place the 'scope probe tip one by one to all other connections, and see what output occurs. It won't help you decode the values though. I don't know what your purpose is. If it is just to learn then that's fine, but if the purpose is to try to replicate, I think that will be very hard, and not cost effective just for a single battery (cheaper to buy a new one than reverse engineer).

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  • Hi Christopher, 

    I don't know about Dyson, but generally circuitry in battery packs perform several tasks, some health related, some monitoring related and some related to safety and some related to closed ecosystem like genuine Dyson batteries. The communication between battery and the rest of the device could be both-ways for some or all of these tasks. The closed ecosystem thing will almost definitely be two-ways, usually that involves a challenge and response mechanism, there's hard coded values and an algorithm buried inside chips designed not to be easy to replicate. If you want to see the communication you can try to look up the part numbers on the integrated circuits and find the datasheets, but they could be obscure parts or the datasheets may be restricted/partial, but you may get enough information that way to at least know what to probe, or you could just probe based on visual inspection, since ground is often easy to identify, and you can then place the 'scope probe tip one by one to all other connections, and see what output occurs. It won't help you decode the values though. I don't know what your purpose is. If it is just to learn then that's fine, but if the purpose is to try to replicate, I think that will be very hard, and not cost effective just for a single battery (cheaper to buy a new one than reverse engineer).

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