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    DC to DC Boost converter for lipo charging

    do DC-DC converters output Watts need to equal the input Watts? I was thinking of doing this too but using the Boost converter to power a 10s BMS.
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    Active pre-charge/inrush control

    i thought of that but i soldered another wire on to both ends and it still worked. sorry the last image didnt load properly. its the white loop wire that im talking about
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    Active pre-charge/inrush control

    i just soldered another separate wire to each of those ends and now it works!?
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    Active pre-charge/inrush control

    The madness doesn't stop!!!! So i took the last 2 remaining mosfets that worked on the breadboard and soldered them to the circuit. I turned on the circuit and everything turned on but the output voltage was only at 30v. I checked the gate voltage and it was only 2.5v. Weird. So I...
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    Active pre-charge/inrush control

    I think i spoke too soon I just tried putting the "bad" mosfets on a breadboard and testing them like that (instead of soldering them in circuit) and they worked fine!? I put a nice size heat-sink on them as they where getting pretty hot. the orange wires were connecting all the gates...
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    Active pre-charge/inrush control

    The PWM part wasn't towards me was it?
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    Active pre-charge/inrush control

    Problem solved!!!!! Fechter you where right! fets where a garbage! lesson learned don't buy from ebay or amazon! I tried this fets with no load and they never failed!!! FDP18N50 http://www.mouser.com/ds/2/149/FDPF18N50T-1008232.pdf im not going to use these for my switch but they where a good...
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    Active pre-charge/inrush control

    They are isolated. Will try some different FETS and let you know
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    Active pre-charge/inrush control

    I did add one thing to the circuit but it doesn't seem to be to be what would cause the issue: I used a DPDT switch and to the second pole i connected a high voltage buck converter to power my receiver. The converter is connected straight to the negative input and the positive is connected by...
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    Active pre-charge/inrush control

    i am using the one with the switch. this is all happening with the pack voltage at 46V. .i checked the zener diode. the second i connect my probes i see 18V on the multi-meter and then it quickly shoots down to 11.5 this while the zener is still in circuit with the rest of the components...
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    Active pre-charge/inrush control

    Im using active PRE-Charge 3B FETS: irf3205 Pack Voltage: 12s Lipo
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    Active pre-charge/inrush control

    hey i have been using the Active pre-charge circuit 3b for some time now and recently noticed that all this time 1 of my 2-FETs in parallel was blown. problem is every time I solder another in parallel the one that didn't blow last time blows!! i even put 4 (fresh ones) in parallel and they...
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    2 Wire BMS

    Billvon i understand how the BMS works but i was asking (amberwolf answered) if the charger will damage the ESC as it is also sending voltage to the ESC directly on a 2 wire BMS. My problem was answered by amberwolf.
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    2 Wire BMS

    of course!! you need a load!! Amberwolf thank you.
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    2 Wire BMS

    can you explain how it does that?
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    2 Wire BMS

    Hello I was looking into getting a BMS for my 12s Battery pack but i saw there is 2 wire and three wire BMS's. i already read up on other posts about the differnece with pros and cons. I had only one qu. For the 2 wire BMS's the load and charging are connected to the same terminal. does that...
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    Two Wire BMS

    What about the current rating of the BMS? do they add up as well when you put 2 2-wire BMS's in series?
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    How does a BMS work

    I have a 12s BMS. All I need is something to power it. I have a ton of old computer power supplies capable of out putting 12v 20A. Therefore I would rather spend $6 on a boost converter and use the old power supplies then spend $25 and buy a whole new power supply!
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    How does a BMS work

    So if I charge the lipos thru a BMS with a 12v computer power supply boosted to 50.4v with a boost converter I should be fine? On the boost converter I can limit the max current. So I can limit it to 3 amps for my 5Ah lipo, which is .6C.
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    Meepo Board

    The kid just sent me this link. Some guy reviews boards and made a blog on it. http://www.electricskateboardhq.com/kierans-meepo-the-person-the-board-the-story/ He said one thing that pissed me off! Check the ESC section of his review and tell me if you catch his mistake as well! Hint he...
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    Meepo Board

    Hello friends. I haven't been here in a long while. I have build 2 electric boards when buying a premade one costed way to much and weren't half as good! All thanks to this community for all the help I got. What has brought me back is I started to inspire younger kids to start to build their...
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    How does a BMS work

    can i just use a boost converter from 12v to 50.4? i already have a 12v charger and the boost converter cost like 5 bucks. btw just to make sure im right i need to supply 50.4v to the bms?
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    How does a BMS work

    what power supply supply would you use for a 12s li-ion BMS?
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    SAVE THE LIPOS!!

    You guys are not going to believe this! so i already read amberwolfs thread on lipos on how they could be dangerous. I wont lie, you guys got me a little more nervous about keeping this cell and lipos in general. i was already carefully never over charged or over discharged and never left the...
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    SAVE THE LIPOS!!

    HAHA! i didnt think it was that bad!! i have put these batteries thru hell, no joke!! :twisted: Shorted out the batteries (all the packs) at least 6 times! :shock: one time it totally chewed up the plastic protection part and the metal, didn't change the connector and im still using it today...
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