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    Grin's CA3 questions

    Guys, I have some problems setting up CA3 with my new bike. This is the 1st time I test the whole bike : My system : + CA3.14 + PR3 + GMAC 8T motor on rear wheel + Grin's thumb throttle + 26" MTB + 20S3P * Samsung21700-40T (72V nom/ 84V max) + JK JBD6A24S10P BMS (100A) + DIY 12-pulse...
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    What to do with these used 18650 Ni-MH ?

    A friend of mine has a few hundred of salvaged 18650-format of Nickel Metal Hydride cells (I guess - never saw this size before). He asked me how can he re-use them ? I measured each cell of 1.3xx V. and the whole 10S1P pack is 13.xx V. I heard that they were from old medical equipment as a...
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    ++Giant Glory DH build + GMAC + PhaseRunner

    This thread is about electrifying my Giant Glory, Full Suspension, Down-Hill bike as a 2nd e-bike project. :bigthumb: (pic from Giant Bicycle's web) ## Existing 1st E-bike : 11k+ km, with in 2 years of conversion. My BBSHD + DIY 14S5P LG18650MJ1 on 27.5” Bianchi hard-tail MTB...
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    LiFePO4 Sources

    Can anyone point me out where to buy quality / reasonable price for LiFePO4, especially bigger prismatic cells like 100Ah & up ? China is also acceptable if they are good enough with their quality & price. There are so many suppliers out there but to find the right one is not easy. Thanks in...
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    How to test cycle life of battery ?

    I admire those who really test batteries for real like thunderheart, Pajda and others that I do not mention here. Especially that they also made that results available to the public. My salute to them. :thumb: :thumb: :thumb: Actual / straight forward cycles test by charging and...
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    Can we parallel BMSs to handle high current ?

    Let's say if we need to make a replacement lithium battery pack for existing lead-acid, mid-size 1.5-ton forklift (48V, 450Ah or more) then we will need a high current BMS to take care of our batt pack. Since high current BMS is harder to find, fewer choices, and might be at risk if we depend...
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    BMS's C-, B- which port to connect and why ?

    BMS's C-, B- which port to connect and why ? We all need BMS on our battery packs. A lot of us use those ready made BMSs from various sources. For example : 14S Smart Li-ion Battery PCB board Bluetooth Mobile BMS for 48V 58.8VLi-Ion E-bike Battery system with 20A to 60A Current...
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    PowerBank Hack ?

    I recently bought some powerbank cases with charging/discharging circuit included. They are cheap and useful to utilize our spare 18650s. Dual USB 8*18650 Power Bank Battery Box Mobile Phone Charger DIY Shell Case ...
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    New 14S7P & 14S5P packs need advices (to climb high mountain)

    Guys, I have a mission to climb a steep mountain 3,000+m rise & 60+km range after this build. So, I need some advices to prepare my new power pack... I have ordered parts needed to DIY 14s7p (98 cells) pack using new LG18650 MJ1 (@3.4Ah ea./10A max) on my BBSHD & 27.5" MTB. This will be my...
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    kWeld Spot Welder Questions 2018.09.27

    kWeld Spot Welder Questions 2018.09.27 Most of the questions are for tatus1969 (Frank), the originator of the kWeld system. However, anyone's comments to any of the questions will be greatly appreciated. Since the original thread : kWeld - "Next level" DIY battery spot welder Post by...
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    Let's dump BMS !!

    Let's dump BMS !! Since we need a way to balance our ebike's battery pack somehow. + Cheap BMS cannot be trusted. They are too quiet and never say much. So, we don't trust them. :? + Smart BMS with Bluetooth to monitor virtually of everything via phone is complicated - some even can't...
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    My version of BBSHD Torque Arm (2018.08) CAD file added 2022.08

    After standard installation of BBSHD to my bike 2018.06 or so (from Youtube method) and running it about 300km+ during the past few months, the BBSHD came loose and dropped down to its lowest position most know about. There must be a way to solve that ... then I remove the two lock nuts at the...
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    Too good to be true 7 wh/km with BBSHD ?

    Kind of new here, might not post correctly - sorry for that in advance. I recently (2-month) converted my entry-level 27.5-in Bianchi 27.1 MTB into an e-bike using BBSHD 48V 1000w kit from AliExpress Battery : Powered by 14s7p 18650 harvested from scrapped laptop batts and DIY into a batt...
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