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  1. Battery Characterization System for 18650 Cells

    Batteries and Charging
    Hi Everyone, I've visited this forum often when researching for my ebikes and the UK solar car, but today I'm a first time poster! I would like to introduce you to my start-up's first kickstarter campaign. Our product, the "Batlab" fills a need in the hobbyist/small-professional markets for use...
  2. How I am connecting four 40s2p battery packs in parallel...

    Technical Discussion
    Overview of the proposed block diagram / system schematic for the Solectria E10 Lithium-Ion upgrade: Video Explanation: http://youtu.be/Pz_ybNO-_fk Thanks, Wolf
  3. Battery Packs at Series and Parallel

    Technical Discussion
    Hi, I have four (4) 37v 10,4Ah lip Battery packs with built in bms. I would like to build a 74v 20,8 Ah, so I have to wire up two at series the other two at series and then this two new packs at parallel between them, right? But I´m not sure a few things, what about the built in bms, would...
  4. Volt batteries safe parallel Wireing

    Batteries and Charging
    Volt batteries safe parallel Wiring I would like some suggestions on options for connecting Volt batteries into a safe parallel pack configuration. The pack will be for a golf/utility cart. The following are some specs I would like from the pack. 48V 200Ah approx. The physical size of 4...
  5. Series connected inputs on isolated DC/DC converters...

    Technical Discussion
    Hi All, For those who don't know, I'm working on an electric race bike destined to compete with Ripperton's machine this June. All of the 12 V auxiliary stuff is to be powered from a 12 V battery, and this battery is to be recharged between races. It will work for now, but later on I was...
  6. Help with figuring out charging Battery harness

    Batteries and Charging
    Hi, I'm powering my ME1003 motor with 4S 5Ah battery packs (http://goo.gl/cbvTm). The packs will be wired in parallel in threes, so I get 15Ah. And 5 of these paralleled packs will be put in series to make 14.8Vx5 = 74V (I know the nominal voltage is higher, but let's assume the battery packs...
  7. charge in Parallel / Discharge in Series

    Batteries and Charging
    Appologies if this has already been answered somewhere else, if it has please link and close the thread. Say I need a pack Voltage between 400-480V If using 3.2cells (125-150 x 10aH) Would I be able to wire it up using some kind of breaker switch or something where I have multiple smaller...
  8. Cheap charging options

    Batteries and Charging
    I am planning my first EV project using a '78 Honda CB400T. It will be 48V with a Mars/Etec style motor. I'm hoping for a 12-15 mile range and a top speed of 50 mph for my commute. My question is about charging. I know using four separate cheaper 12V chargers can work well to keep everything...
  9. Controller Question

    Controllers
    Hello, ive searched for the answer to my question for a while and am unable to find it, thats why i joined DIY electric car. My question is can you hook up a controller in series or parallel with a twin controller (ie the exact same controller) to increase either the voltage or the amps the...
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