All TGA lithium battery packs contain a temperature sensor. When this sensor records a temperature of 10°C, the internal circuit board will stop the battery charger from working in order to protect the battery cells. Once the battery pack reaches a temperature of approximately 20°C it will then allow the charger to start working again. This is only relevant if the pack drops below 10°C, so long as the battery pack is stored and remains above 10°C then the charger should work as normal, standard room temperature is sufficient.
The folding part probably doesn't get its power from the module so connecting direct to the module won't help. Can you connect 24v to the xlr port?
Is it indoors in the warm or somewhere cold?
It contains a dumb BMS too. And if any cell is allowed to discharge below safe voltage of whatever the programmer decided, through self discharge, or from powering the BMS itself, then it also cuts off power or charging completely.
or from powering the BMS itself
It contains a dumb BMS too. And if any cell is allowed to discharge below safe voltage of whatever the programmer decided, through self discharge, or from powering the BMS itself, then it also cuts off power or charging completely.
So how do you rescue it?
rickystyx wrote:there should be a foot paddle that will allow you to unfold it even when the battery is flat
Burgerman wrote:It contains a dumb BMS too. And if any cell is allowed to discharge below safe voltage of whatever the programmer decided, through self discharge, or from powering the BMS itself, then it also cuts off power or charging completely.So how do you rescue it?
Dissasemble battery case. Add 4.200v TO EACH CELL INDIVIDUALLY one at a time to both fully charge and balance in one go. Do so until current falls to a couple of mA for each individually. But if any cell has dropped lower than say 2.5V its probably toast. Also do this oustide as these are really fireworks disguised as battery cells.Thats why the BMS wont allow you to charge it in the first place.
As I say, the BMS takes power 24/7 from the battery causing this problem to occur faster. A self fullfilling prophesy. And many take their power from just 1 or 2 of the cells. Instead of all 7. So unbalancing the pack in the process. This is one of the reason when converting to lithium we dont use any BMS. Theres others!
GusGf wrote:First of all thanks for the repliesThe folding part probably doesn't get its power from the module so connecting direct to the module won't help. Can you connect 24v to the xlr port?
Well all I'm trying to do is confirm that the battery really is the culprit. So I thought by disconnecting the battery power leads from the controller and connecting the off board charger directly to those power inputs on the controller I'd be able to get enough power to see some life i.e. see some lights come on at least. I would not have attempted to unfold the scooter using power from the charger, god knows what damage that might do?
GusGf wrote:
I also have the users manual you linked to but it makes no mention of unfolding by hand.
rickystyx wrote:GusGf wrote:
I also have the users manual you linked to but it makes no mention of unfolding by hand.
It seems to indicate the need for a separate battery or at least your battery having been charged and then a lead from that to the chair - it appears from that to need a seperate 24v supply of some sort that is substantial enough to operate the unfolding motors - sounds about as daft as the design of my Skoda
Where abouts are you - one of us may be able to help with a 24v hook up if you are somewhere near but you haven't said in your profile
Burgerman wrote:Do you live in a house? Take upstairs. Open a window. Throw it out. Battery not visible? Chair not unfolded? Rinse and repeat. No luck? Find higher building. Try again. This would eventually work. Probable last resort though. Its what it makes you WANT to do.
...Ummm , I suspect that the controller has NOTHING to do with the unfolding bit ...it will just controls the drive motors.Tomorrow the plan is to connect up a power supply to the power terminals on the controller and get this damn thing unfolded.
rickystyx wrote:You need to be very careful with TGA wiring as on all the tGA's I have dealt with their wiring of the plug was the opposite of everybody elses. Check with a voltmeter for which is positive and which is negative - the third connection is an inhibit to stop anything from moving whilst the charger is connected.
There must be some residual voltage left to give you a positive and negative reading
Connect the ‘Remote battery connection lead’ that was supplied with your scooter to the
charging socket on the top of the battery, and to the charging socket on the side of your
scooter, ensuring that they are firmly located.
Burgerman wrote:Its a scooter so who knows. But o a powerchair and all mobility devices theres no ground. That yellow wire is the 3rd pin, usually used as an inhibit so you dont drive away with charger connected or for programming.
If you add 12v to that white and pink connector it actuates that ram. Does that open the chair? If so it will save you taking it upstairs.
rickystyx wrote:You need to be very careful with TGA wiring as on all the tGA's I have dealt with their wiring of the plug was the opposite of everybody elses. Check with a voltmeter for which is positive and which is negative - the third connection is an inhibit to stop anything from moving whilst the charger is connected.
There must be some residual voltage left to give you a positive and negative reading
GusGf wrote:Burgerman wrote:Its a scooter so who knows. But o a powerchair and all mobility devices theres no ground. That yellow wire is the 3rd pin, usually used as an inhibit so you dont drive away with charger connected or for programming.
If you add 12v to that white and pink connector it actuates that ram. Does that open the chair? If so it will save you taking it upstairs.
Hmmm now that's a good idea. Worth a shot but how do you control which direction the ram goes once you apply power, is it some kind of toggle operation
Hmmm now that's a good idea. Worth a shot but how do you control which direction the ram goes once you apply power
GusGf wrote:
Hmmm now that's a good idea. Worth a shot but how do you control which direction the ram goes once you apply power
woodygb wrote:The instructions for unfolding the Minimo with the battery removed actually involve using the removed battery as the power source.Connect the ‘Remote battery connection lead’ that was supplied with your scooter to the
charging socket on the top of the battery, and to the charging socket on the side of your
scooter, ensuring that they are firmly located.
Burgerman wrote:Hmmm now that's a good idea. Worth a shot but how do you control which direction the ram goes once you apply power
Reverse it to go the other way.
woodygb wrote:GusGf wrote:
Hmmm now that's a good idea. Worth a shot but how do you control which direction the ram goes once you apply power
IF the wiring is equipped with limit switches ... it should be ..., then it will only operate in the correct direction and unfold.
Return to Everything Powerchair
Users browsing this forum: DrewDigital, shirley_hkg and 187 guests