Hi everyone,
i just back home, Test 2 on this cell 38140s. This 12hr cells of 10c each, This is very impressive. the troque is obviously comes stronger then my vpower battery. it can easily stay at my top speed 51km/h... (top speed.... all the way),there is a bit drop then going abit of slop, or reduce my throttle. USD461.00 with shipping to singapore. however that lady in Bmsbattery takes sOOO long time to process its shipping. she needs 16days to send that battery. i didn't ask for a battery charger, because my vpower charger of 5Amper is doing very well.. since last year ago !! when i run my Vpower charger, i will put one more extra fan to blow, just incase if it heats up. it safer better then worry. As you know those fans build inside the charger - I think it cannot perform its cooling fast. SO i add one... to blow that heat away effectively.. The weight 48v 12a lifepo4 (cells 38140S) is 6.7KG... (tested with my digital weight machine) this pack of battery is lighter then my SLA batteries. 17.1KG. (very heavy broke my rack Once, Topeak branded one SGD58.00 very expensive) i cannot use this SLA batteries, now the total current is 80watts. (2months only) Please avoid all SLA batteries, if you want for a happy ride. my new lifepo4 48v 12a, is 2.5times lighter.. ha ha..
yes, the pickup speed has improved very obviously. (compare to the normal cells vpower 1-2 c) only. Vpower battery will takes long time to reach 50km/h, BMSbattery cells 38140s... will takes alot few seconds LESSER" to clock 50km/h... i havent do a test.. i had no time to count. JUSt a while.. im already there 50km/h. That is really fast. i got to try that again.. so i can get a ideal... How fast it can troque to give me 40km/h ? HOW many seconds..
yes. you can custom build your own shape battery. they email me back, after i have sent the money by paypal. this lifepo4 is a 10c, so don't worry. it sure can deliever at least 3c, however im just looking for 1.5c + only. however they will ask you about your BMS .. What is the peak current do you want ? so you got to get ready to answer them... 50amper peak ? or 60amper peak. ( The high amper peak, i think it cost more ) my amper peak is only 40amper peak, so is only 1920watts. And can contineous 30amper current.. = 1500watts (AP) having to stay at 1500watts..= that is my top speed... all the way. that is why i got my 2nd pack lifepo4..
My BMS in my this lifepo4 is only support up to 2C only. so my cells can give 10c, but the bms will control to output power only 2c. it cannot work more then 1920watts motor/ or controller. the bms will blow.. ( i think so ). as long everything can match properly.. i will run all the way without any worry. Customer support , i think they don't have. as long your motor specification must match with the BMS out put current. if you bms is looking for 3000watts Output, how many amper is that ? 62.5 amper. So the peak must be 65amper peak for the bMS. everything is good, they will also ask you, ? Do you use anderson plugs, etc. however i prefer something even better, Round rings connectors. (sorry i don't know the name) but i have photos.
my total is 16cells only, very less complicated connection.. (simple actually), unlike vpower.. HUDREDS of small cells.. im very worry for that. less connection= less problems. that small pack battery i can easily slot in cushion all the sides.. so going for hard rocky ride. the battery won't hurts.
cheers
kentlim