Category Archives: Battery Pack

42v 1.5a Charger

A very compact 42V 1.5A Lipo Charger (120x52x32mm).  Good!
Problem- BMS start balancing at 4.18±0.02v this 4.17v won’t kick start the balancing function in BMS.  Need to open it and readjust the voltage.

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Battery Alignment

Checking out all the 30pcs NCR18650B’s capacity and build a program to align their combination.  It’s a 10×3 battery pack, 3pcs of NCR18650B together to build up the total mAh.  Currently I had only discharged 24pcs of NCR18650B 6pcs on the way…(realignment result are getting better and better)  Got those NCR18650B from AliExpress Liitokala Store, just too bad they are not close to their normal rated 3350mAh capacity.  hmm, degraded batteries!?

BATTERIES…

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01  3234, 3234, 3009, 3147
02  3156, 3105, 3112, 3241
03  3149, 3082, 3171, 3131
04  3114, 3124, 3158, 3213
05  3193, 3239, 3193, 3269
06  3147, 3128, 3215, 3247
07  3233, 3143, 3200, 3183
08  3246, 3155, 3152, 3196
09  3208, 3127, 3187, 3269
10  3220, 3123, 3148, 3201

3PCS PAIR SORTING

3269, 3269, 3247
3246, 3241, 3239
3234, 3234, 3233
3220, 3215, 3213
3208, 3201, 3200
3196, 3193, 3193
3187, 3183, 3171
3158, 3156, 3155
3152, 3149, 3148
3147, 3147, 3143

AVG: 3198, TAG(3): 9594

01 [3269, 3183, 3143] = 9595
02 [3269, 3171, 3155] = 9595
03 [3247, 3200, 3147] = 9594
04 [3246, 3201, 3147] = 9594
05 [3241, 3196, 3158] = 9595
06 [3239, 3208, 3148] = 9595
07 [3234, 3213, 3149] = 9596
08 [3234, 3215, 3152] = 9601
09 [3233, 3193, 3156] = 9582
10 [3220, 3193, 3187] = 9600

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Battery Case

Battery Case & Holder

BatteryCase

Interest thing happen (always).  The FastRoad CoMax1’s center bottle hold is actualy 4° offset.  I’ve modified the CAD data for 3D printer.

BatteryCaseOffset

Here is the 3D printed result.  Looks Good!  I seen this 2 years ago in my head, just it takes time to output them to the real world.

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