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08-19-2009, 12:46 PM
| #1 |
| Newbie Join Date: Feb 2005 Location: Pittsburg
Posts: 12
|  Battery doesn't work
Howdy, i recently assembled a GP3300 pack with i believe Team Orion Bones connectors and it wont work. I plugged it up to my charger and it read 7.5 volts so i threw it in my T2. Turned on just fine,turned fine, but when i hit the throttle it died. What could be my problem? It was my first time ever building a battery. All help will be appreciated.
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08-19-2009, 12:47 PM
| #2 |
| I wanna be Dave Join Date: Jan 2005 Location: Hueytown, Alabama
Posts: 6,777
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Were the cells new? Any way to get a pic of it?
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08-19-2009, 01:11 PM
| #3 |
| Rock Crawler Join Date: Feb 2008 Location: UK
Posts: 818
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A fully-charged 6-cell pack should read about 9v. Maybe you've got a bad cell, or a bad connection between 2 of the cells. I've had the same problem with one cell dying. The pack measures a bit low on a volt meter, and seems to power the model OK. As soon as I hit the throttle, it cuts out. Metering each individual cell, one was down at about 1.2v, the rest were at 1.5v. Under load, the "low" cell dropped down to nothing. A bad joint (high resistance dry joint) on one of the bars or the wires will have the same effect - a small current will flow to arm the ESC and work the servo, but hit the throttle and not enough current can pass to power the motor. The voltage drops, and the ESC and Rx switch off. Try re-soldering all the connections. |
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08-19-2009, 02:23 PM
| #4 |
| I wanna be Dave Join Date: Dec 2008 Location: Madrid, IA
Posts: 2,015
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this may sound dumb but from what you wrote it doesnt sound like you charged it, but only used the charger to check the voltage. because fully charged should be 8.5v-9v area
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08-19-2009, 07:55 PM
| #5 |
| I wanna be Dave Join Date: Sep 2008 Location: four o six
Posts: 2,101
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I 3rd the "sounds like your battery's arn't charged" since you plugged them in the charger, why not let them charge for a bit... |
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08-20-2009, 01:03 PM
| #6 |
| Newbie Join Date: Jun 2008 Location: Houston
Posts: 46
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Nimh sometimes give false readings on mutimeter where they show 7.4 volts or higher but when put under load they drop down to less than 6 volts. this means that one of the cells is bad. check each one to see if they have all have 1.2-1.4 volts
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08-20-2009, 02:06 PM
| #7 |
| Newbie Join Date: Feb 2005 Location: Pittsburg
Posts: 12
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Thanks guys. I think one of my problems might be a little too much solder on the batteries, i heard that can cause them to not work right. Ill try later on tonight to put it together and try and get some pics up. Jeremy |
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08-22-2009, 09:24 PM
| #8 |
| Newbie Join Date: Feb 2005 Location: Pittsburg
Posts: 12
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Alright, i re soldered and it stills doesnt work, but if i apply pressure to the bars i can get 7.76 volts  ? Are the bars not grounded good enough or do i just need to break down and buy a new battery? Sorry if its a dumb question, like i said its my first time to build a battery.
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08-22-2009, 10:03 PM
| #9 |
| I wanna be Dave Join Date: Mar 2009 Location: sittin in the sky
Posts: 4,630
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use small pices of wire not batt bars
Last edited by 2500hdon37s; 08-22-2009 at 10:08 PM. |
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08-22-2009, 10:32 PM
| #10 |
| www.team3sixrc.com Join Date: Mar 2008 Location: Scalerville
Posts: 4,506
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Linear Mode
