Search results

Date Relevance Most replies

  1. M

    Bulk charging A123 with a Meanwell SP-320-48

    ask ping for a BMS; it is the simplest mode to protect your cells. and you can use the Meanwell for charge with the BMS. You have to adjust the voltage of the power supply to 16 x 3.65 = 58.4 V; If you will monitor the charging process you will see that at the end of the charging the current...
  2. M

    Resolved - Ping diagnostic help. 0v at charger plug.

    cut the XLR connectors and put a simple RCA;
  3. M

    Water bottle battery

    Yes with 42 cells you can make an 14S3P pack; but with these li-ion 18650 cells that it is not a good solution; these cells are max 2C; in practice it is good to use them 1C max. 3P is 6.6Ah that is too low. And you still need another BMS for 14S; that 10S BMS cannot be modified for 14S; and to...
  4. M

    Water bottle battery

    You have 40 cells total; because there is 10S you have ten strings of four cells in parallel. For 14S you need another 16 cells to make four strings; But, first thing: the bottle is too small; second, you need another BMS for 14S; third you need another charger. It's not so easy to upgrade an...
  5. M

    Water bottle battery

    very interesting pictures; are the green cells A123 26650 cells ? Can you measure one cell ? if it has 26 mm diameter it is A123 26650. Sorry, it is a Lithium ion 10 S. Maybe 18650 round cells.
  6. M

    To: EP/KP series charger users who use them for LiFePO4

    hi, can anyone help me with this problem ? I have an Chinese charger that has this lock; it starts only I plug off both the AC and DC cables. I tried to remove that transistor from the daughter board but nothing new; The charger stops and never restarts.
  7. M

    What 20AH battery pack to build?

    try http://www.ev-power.eu/index.php?p=productsList&sWord=promo this; it is near you;
  8. M

    Large EV battery pack.

    A 500 A controller with 144 V equal 72 kW; about 90 HP;
  9. M

    Ok, I bought a (slightly) used duct tape (Vpower) battery...

    Like amberwolf said it is difficult to repair the Vpower batteries; I also bought one last year in the summer; 36V 20AH (18P12S) with 212 $ without shipping on an auction; In the first charge/ discharge one cell group died; the supplier sent me a "new" one; I opened the pack, cut the bad group...
  10. M

    G-Power in china

    I made an order from G-Power: e bike kit: hub motor 36V350W front wheel without spokes and rim, controller 36V350W, throttle and breaks; Total cost with shipping 170$; The parcel arrived Friday 17 June; I was Saturday to a bike shop to mount the motor with spokes and rim and yesterday I took the...
  11. M

    Super Simple Cheap Battery Gauge

    Today I will receive a parcel from G-Power with a ebike kit and an Fuel Guage; At product description : ">Apply to PCB/PCM of 1~13 cells li-ion battery pack. >Apply to PCB PCM of 1~16 cells LiFePO4 battery pack. >No external power is need. >Can connect directly to PCB/PCM via special...
  12. M

    Homemade Battery Packs

    guys, maybe with http://www.bmsbattery.com/li-ion-cell/12-4ah-3c-c-rate-26650-g-limn2o4-cylindrical-battery-cells.html this kind of Li ion cell; they make packs with these cells; which is why we can not ? the cells are rated 2C discharge; the packs that they sell have 12AH with max continues...
  13. M

    Building a pack using salvage 18650 cells

    I found on Ebay a lot of 18650 Li-ion cells with different capacities between 1000 mAh to 3000 mAh; especially http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280498128322&ssPageName=ADME:X:AAQ:US:1123 18650 Li-Ion 3.7 V 2400 mAh costs 1$ each; I asked the seller about the discharge rate...
  14. M

    3 speed sturmey front wheel drive with 30(-45)mile range

    hi, I am considering to transform an city bike with 3 speed in an electric bike; My first choice is to put a front wheel hub motor; The second choice is to make a non hub electric bike; the question is : how good is the 3 speed hub system ? can electric motor destroy the mechanism ?
  15. M

    bad lifepo4 pack

    The problems with vpower packs are from the refurbish A123 cells; I also bought one in the summer and is still on the test board; Like yours, form the first time the pack was unbalanced; only 4 or 5 Ah drained after a few cycles and a bad cell; I asked wpower guy and he send me a new one after...
  16. M

    LiFePo4 charging process

    Hello again; after almost a month I have some news; I received the new cell string from V-power; in this time I also bought a Ping battery; I was very busy with it; I made a aluminum case for it; the original battery case is about 5 mm shorter; bad luck; I asked Ping to send me an extra BMS...
  17. M

    Where did you order your headway cells from?

    try here http://www.ebike-bmsbattery.com/; they have reasonable shipping cost;
  18. M

    V-Power

    yes, I have a watt meter; the maximum 14.5 A; the mileage is about 0.25 - 0.33 AH/km; this is tested in many rides; the bike is 35 kg and with me is about 120 kg; With the new Ping battery I made a ride of 44 km with a 13.8 AH; I also want to repair the vPower and test it; maybe it will work;
  19. M

    V-Power

    If you need 10C yes the Headway are good; but for a normal commute with a 36V and 350W hub motor is too expensive Headway; yes v-power is a nightmare; I also bought a Ping battery; my e bike drains max 15A from the battery and the Ping battery is good; If I will repair the v-power I will use it...
  20. M

    V-Power

    My story with v-power battery was very short; it came very unbalanced and after 3 sessions of charge - discharge I lost one cell; I opened the pack and talked with the v-power guy to send me a "new" string of 3.2 V; this talking was two weeks ago; he send me on 26 august and I saw that the...
  21. M

    LiFePo4 charging process

    ok; it is clear: the left most pin from each balance port from the Accucell 8150 is the minus of the first cell; this first cell is from the minus of the battery pack; I put a picture; Also please correct me if it is wrong.
  22. M

    LiFePo4 charging process

    jdcburg you said that you connect the charger with the celllog; then the pin number 1 from celllog that is a minus goes to the first pin in the charger JST connector from left ?
  23. M

    LiFePo4 charging process

    Thanks jdcburg; I will order today a JST connector for 6 cells; but the question still remain: how to connect the wires from the JST connector to the cells ? can you look to your Accucell and tell me; lest say you look straight to the left side of the charger; the 6S connector it is on the...
  24. M

    LiFePo4 charging process

    Can anyone help me with the balancing charge for Turnigy Accucell 8150 ? I have an 36 V 20 AH battery pack made from strings of 3.2 cells (18 per string); I am not sure how to connect the balance wires; I want to balance six cells in series; in the Accucell manual there isn't any information...
  25. M

    LiFePo4 charging process

    Yesterday vPower gave me the tracking number for the new cells; I have to wait almost two weeks for them; Until then I want to charge and discharge each 3.2 V cell to see the real capacity; also I want to balance a group of 6 cells with Accucell 8150; I made also a charge and discharge to...
Back
Top