Recommendation on a BMS swap (10s5p 36v)

[savas]

Hi,

I've got a none functional battery BMS, just says LT-PD64U on the back of it. Could not find the exact model, however wish to buy a like for like or better. Those knowledgeable could kindly recommend alternatives please? I'm seeing some £10 ones, but barely a clue if any good.

it's 10s5p 36v battery pack.

LT-PD53U-深圳市力通威电子科技有限公司

LT-PD53U是力通威公司专门针对电动自行车、电动工具等7~13串电池包而设计的保护板方案；可适用不同化学性质的锂电芯，如锂离子、锂聚合物、三元锂等。 保护板带载能力强，持续电流最大可达25A。保护板带1A的USB电源,可自动识别各种手机...

www.lt-power.com

The Chinese writing below states (as per google translate):
LT-PD53U is a protective board solution specially designed by Litongwei Company for 7~13 string battery packs such as electric bicycles and power tools. It can be applied to lithium batteries with different chemical properties, such as lithium ion, lithium polymer, ternary lithium, etc. .
The protection board has strong load capacity and the maximum continuous current can reach 25A. The protection board has a 1A USB power supply, which can automatically identify various mobile phones and intelligently control USB power output.

 

[savas]

Would these be any good?

10S 36V 30A BMS Protection Board with Balance for 18650 Li-ion Lithium Battery
https://www.ebay.co.uk/itm/174383454241

36V 35A 10Series BMS PCB Protection Board with Balancing for Li-ion Battery Cell Pack: Amazon.co.uk: Electronics & Photo
https://www.amazon.co.uk/10Series-Protection-Balancing-Li-ion-Battery/dp/B075MFBB23

36V 35A 10S PCB BMS Li-ion Battery Protection Board with Balancing Protection for Ternary Cobalt Cells : Amazon.co.uk: Electronics & Photo
https://www.amazon.co.uk/Li-ion-Battery-Protection-Ternary-Balancing/dp/B07CMB83RN/

 

[saneagle]

You can use any BMS you want. they nearly all do the same job. Look for one that has the same features as your present one, like a switch if it has it. Temperature sensor is always useful.

There's a high probability that the multi-pin connector will need rewiring. You can have 9, 10 or 11 pins on the connector, depending on how it's wired, and, more important, the connections can be completely reversed on the connector, even when it has the same number of pins, so check that first. Basically, check every wire on it from first principles.

 

[savas]

Thanks.

Hmm, actually forgot about the switch. The four pin slot up top plugs into a USB plug, kind of handy I guess, but not critical, doubt I can find a board that has that also.

Edit:

Managed to find these with a switch, however the amps are less than the old one. Ideally would like for like.

BMS 10S 36V 20A Pre-Wired Separate Port PCB PCM Cell Protection with NTC Switch | eBay
https://www.ebay.co.uk/itm/235331559641

ZIBESTYU LT 10S 36V 20A BMS PCB Same Port with NTC Thermal Sensor for 18650 Li-ion Battery Packs: Amazon.co.uk: Electronics & Photo
https://www.amazon.co.uk/ZIBESTYU-Thermal-Sensor-Li-ion-Battery/dp/B0CJXK76WW

 

[saneagle]

You can use a separate USB module. There are loads of different ones that you can find on Aliexpress and Ebay. Here's an example. just connect two wires:

9~85V to 5V 12V Step Down Power Convertor E-Bike Mobile 5V2A USB Charging module | eBay

Output: 5V /12V optional, maximum 2A output. Non-isolated step-down module. With output short circuit protection. Is the module safe?. With output short-circuit protection. Input with thermal sensing protection.

www.ebay.co.uk

Some of those small BMSs don't appear to have balancing. They claim that they do, though they don't have the lines of bleed resistors and other components. maybe they do it differently, but I don't trust them. You just have to keep searching to find what you want.

 

[savas]

You can use a separate USB module. There are loads of different ones that you can find on Aliexpress and Ebay. Here's an example. just connect two wires:

9~85V to 5V 12V Step Down Power Convertor E-Bike Mobile 5V2A USB Charging module | eBay

Output: 5V /12V optional, maximum 2A output. Non-isolated step-down module. With output short circuit protection. Is the module safe?. With output short-circuit protection. Input with thermal sensing protection.

www.ebay.co.uk

Yeah, I was thinking that too, thanks for the link.

Some of those small BMSs don't appear to have balancing. They claim that they do, though they don't have the lines of bleed resistors and other components. maybe they do it differently, but I don't trust them. You just have to keep searching to find what you want.

Yeah, noticed one reviewer mentioned this, so I guess when it comes I'll double check. Odd.

 

[savas]

What do you think of this saneagle?

BeMuchSafer 10S 35A 30A 36V Battery BMS 10S30A 10S35A BMS With Balance Function On/Off Switch Temperature Sensor for DIY E-Bike
https://www.aliexpress.com/item/1005004823759310.html

 

[saneagle]

What do you think of this saneagle?

BeMuchSafer 10S 35A 30A 36V Battery BMS 10S30A 10S35A BMS With Balance Function On/Off Switch Temperature Sensor for DIY E-Bike
https://www.aliexpress.com/item/1005004823759310.html

If it's what they say in the listing, it should be OK, but other ones said they had balancing, but appeared not to have. You won't know until it comes and you look on the pcb - if you can see enough under the heatsink.