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Thread: Li-ion battery pack

  1. #1
    Join Date
    Nov 2014
    Location
    mid michigan
    Posts
    792

    Default Li-ion battery pack

    I am constructing a battery pack to run a MR11 solarc hid lamp, i have the control board for charging and monitoring each cell, but the cells i am using have there own pcb that does this as well, i am thinking of pulling that board off as it seems to be redundant as the controller already has over voltage/current and balance charging for each cell, In packs i have built in the past and ones i have torn apart don't have the boards on the cells them self so i am thinking it's redundant to have both and may cause faults for the master control?
    wondering if anyone has any other input?
    Polk SDA SRS, Parasound HCA 3500, Luxman M117, Onkyo 504, 7.62X39, sometimes a ball on a string is the greatest of toys for us nonhuman types. oh and some lasers, lots of lasers

  2. #2
    Join Date
    Jan 2015
    Location
    Seattle Washington USA
    Posts
    52

    Default

    are these 18650 cells?

  3. #3
    Join Date
    Nov 2014
    Location
    mid michigan
    Posts
    792

    Default

    same chemistry just they are 26650, as i understand the format that 26 mm across and 650mm long, they have a capacity of 3500mAh, in all other aspecs they are the same as 18650 cells just bigger in physical size

    discharge if my math is right is 1/3 C worst case, the solarc is made by Welch Allyn and is in the MR11 form factor, lol it was the shit before high power leds came about, i have used it for camping but my custom battery pack finally gave out so i wanted to switch to Lion since the cost came down, i think i even did a build of the thing of CPF in 2005 ish
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    The MR11 is in the larger reflector and Draco is holding the 21 watt side arc hid that got rulled out because of ballast size and color instability but i still have it and use it, it hangs from the center of a pop up tent and i run the wires to a 12 volt battery
    Last edited by Draco; 06-21-2015 at 03:42.
    Polk SDA SRS, Parasound HCA 3500, Luxman M117, Onkyo 504, 7.62X39, sometimes a ball on a string is the greatest of toys for us nonhuman types. oh and some lasers, lots of lasers

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