Philipp, It looks like 14ga wire has .00297 ohms per foot. The 2 battery wires measure 1 foot each for 2 feet total. 2 times .00297 ohms/ft is .00594 ohms...
Philipp, Yes, ABF have chargers and their construction looks very solid and professional. I have not taken one apart but might do in the future. It has a red...
... wrote: Hello. I was running three ABF 11AH 14.8V Li-Polymer packs in series to provide 44.4V to my front 408 hub motor. I had an unfortunate incident where...
... Dale, The motor is an inductive device and kicks back negative voltage spikes. Resistive loads will not do this. If you analyze the damaged FETs you would...
... David, Here is my RANT... Actually I didn't see anything wrong with including the history for which my post was responding to. Sometimes people do not ...
... <davidl@s...> wrote: Hello Tim, No, this has nothing to do with the content of your posts, which have been on-topic and welcome to the Power-Assist group....
... Just a thought, but is the BMS in question of the "laptop computer" style, which has a FET switch in circuit, in each pack or group of cells? If so, this...
Hi, Is it allowed to connect batterypacks with BMS in serial? May be the FET's are not calculated to switch off 44.4V instead of 14.8 V? Philipp ... ...
Tim, I found a table to compare cables "awg and mm2": http://www.binder-connector.de/d/informationen/content2.asp?SecureID= (the gmb LiIon 10Ah pack has only...
Hello Philipp, I believe the BMS should only ever see the voltage across its terminals, no? So it will not see the entire pack voltage even if in a series...
Hello All There is no problem in connecting battery packs with PCM (or BMS) systems in serial IF the whole pack is functioning well. The FET if well rated...
ENERGY NRGCELLS
nrgcells@...
Oct 5, 2004 1:21 pm
794
David and others - the battery BMS system may remove itself from the charging current when the cells reach full charge and since you are charging with much...
Correct me if I am wrong but... An operating motors function during regen can be thought of the same way as a battery charger or generator that is applying a...
Having a fly-back diode across the battery pack will protect it against negative fly-back pulses and reverse motor drive shaft rotation, example...going...
... same way as a battery charger or generator that is applying a higher voltage of the same polarity to the pack. This will cause current to flow into the...
Sorry about that...I should have elaborated. The words in parentheses were only meant for the 6 words in front of the parentheses. If you are facing uphill...
-> I assumed the above post was about the FETs on the batteries BMS due to ... Yes ... But they are all connected and need to be in the picture. ... voltage, ...
... Hi Tim - be careful doing this, there's no way of limiting the current and if you're relying on the controller diodes to do this braking, they might break...
Can anyone here answer Matt's questions about ABF Li-ion batteries? ... From: MATTHEW WILSON To: davidl@... Sent: Wednesday, October 06, 2004 6:52 PM ...
Hello Nick, Better late than never... The existing 36 V 12 Ah NiMH (~ 352 mm x 110 mm x 99 mm) is too long for your bag. However, they can be reconfigured as...
Thought everyone might want to hear about the modified ABF BMS (adding flyback diodes) testing results. Tim ... From: "dale monger" <dale_monger@...> ...
Hello Tim and Dale, Do you have a part number and source for the diodes you are putting on the ABF Li-polymer battery BMS? Also, how about posting some ...
From the avid experimenters at Power-Assist and VisforVoltage forums: here are links to Kokam Li-polymer cells, as used in an EV application. Very sexy...
... These South Korean batts are pretty impressive and quite expensive. The 3.6V 40 Ah cell (looks like a flat flexible green vinyl pencil holder I used to...
... wrote: We looked at these cells a couple of years ago and were not impressed. Sure, they look like they have high current capability, but that is only...
David, Any off-the-shelf 6 amp 200v to 600v diode should work fine. It is soldered next to the large red and black wires in the att photo. I could not readily...
Hello David. I just went to the local electronics shop and asked for a 6amp 200V diode. They didn't have them, but did stock 6 amp 600V diodes. (doesn't need...
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