How to make a lightweight battery

[drummerian]

10s2p, that picture is1 of 2 cell sets in the same configuration, making a 5s2p. Two of these on top of each other will make the 10s2p configuration, probably with a link wire between the 2.

 

[grazie]

For 10s2p, I'm I correct in assuming you'd need 2 of the BMS boards linked to earlier at AliExpress (I've not been able source them from anywhere else) to cope with the 20 cells?

Are there readily available low cost BMS boards that can handle 10s2p, 10s3p, 10s4p, etc. or can the above BMS cope with managing cells connected in parrallel?

I've also seen Arduino based DIY BMS projects out there, but not sure how suitable/reliable/safe they'd be for an eBike application.

 

[wheeliepete]

One BMS can deal with any number of parallel cells, just get the one to suit the no. of series cells you have. I've used this one on several 36v 10s packs.

https://www.ebay.co.uk/itm/Battery-Protection-Board-BMS-PCB-10Packs-36V-10S-Li-ion-Cell-Max-40A-Balance-BSG/122928984391

 

[grazie]

Thanks Pete. Any views on these (or others) from Amazon? Only asking as I got Amazon credit to use up. Obviously, most interested in the first listed due to its claimed 35A rating.

https://www.amazon.co.uk/Battery-Protection-Asixx-Ternary-Balancing/dp/B07F1TK7SQ/ref=pd_sbs_107_1?_encoding=UTF8&pd_rd_i=B07F1TK7SQ&pd_rd_r=42f4cd45-9572-11e8-9a6f-ad3730aad927&pd_rd_w=mOo8A&pd_rd_wg=pOrb2&pf_rd_i=desktop-dp-sims&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_p=5179604776422437276&pf_rd_r=T4V5PJ6Y87NT4700Y818&pf_rd_s=desktop-dp-sims&pf_rd_t=40701&psc=1&refRID=T4V5PJ6Y87NT4700Y818

https://www.amazon.co.uk/Sharplace-Lithium-LiFePO4-Protection-Balancing-multi-color/dp/B077KWVVNK/ref=pd_sbs_23_4?_encoding=UTF8&pd_rd_i=B077KWVVNK&pd_rd_r=0ac604d6-9572-11e8-9a6f-ad3730aad927&pd_rd_w=hjU1m&pd_rd_wg=l0nIi&pf_rd_i=desktop-dp-sims&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_p=5179604776422437276&pf_rd_r=AX8CCZ7N2CBXZM682VJ2&pf_rd_s=desktop-dp-sims&pf_rd_t=40701&psc=1&refRID=AX8CCZ7N2CBXZM682VJ2

https://www.amazon.co.uk/MagiDeal-Lithium-Battery-Protection-Balance-multi-color/dp/B077X7CCQB/ref=pd_sbs_23_5?_encoding=UTF8&pd_rd_i=B077X7CCQB&pd_rd_r=0ac604d6-9572-11e8-9a6f-ad3730aad927&pd_rd_w=hjU1m&pd_rd_wg=l0nIi&pf_rd_i=desktop-dp-sims&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_p=5179604776422437276&pf_rd_r=AX8CCZ7N2CBXZM682VJ2&pf_rd_s=desktop-dp-sims&pf_rd_t=40701&psc=1&refRID=AX8CCZ7N2CBXZM682VJ2

 

[wheeliepete]

Not used any of them myself , but all look suitable. This is the one I linked to above.

https://www.amazon.co.uk/Sharplace-42-45V-Battery-Protection-lithium/dp/B072FQ41V9/ref=sr_1_3?s=electronics&ie=UTF8&qid=1533122695&sr=1-3&keywords=10S+BMS