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Old 07-16-17, 03:49 PM   #1
leprachun
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need urgent help please!

So i bought a ebike kit to try build it my self, i managed to get everything wired up but i stumbled into a problem.

How do i connect the controller to the battery? do i miss a cable or something?

Edit: cant post any urls unless i have 10 posts. Im new here so i put the url bellow.
replace dot with a dot

imgur"DOT"com/RKJomeH
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Old 07-16-17, 03:54 PM   #2
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There should be a red wire and black wire on each. Red to red and black to black, but to be sure check polarity first. You may need to get connector(s) for one or both that are compatible and solder or crimp to the wires.
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Old 07-16-17, 04:54 PM   #3
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If that socket shown in the picture is the discharge port on the battery, you will need to get a matching female plug and build a wire that will connect from there to the thicker red(+ve) and black(-ve) wires on the controller. I believe that is an IEC320 plug. The easiest thing would be to get a power cable which already has the female connector on one end and cut off the other end to wire to your controller. Those cables are fairly common and used as AC power cables..for example from wall to brick for PC charger.

Of course if that is not the discharge port on the battery, ignore all of the above.
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Last edited by dilkes; 07-16-17 at 04:59 PM.
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Old 07-16-17, 06:39 PM   #4
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Are you using SLA Or LiPo batteries. the LiPo battery will have a red and black wire. but if your using SLA batteries then you'll have to build a wiring harness for the batteries. If you are setup for SLA batteries then this may help. you'll need to make the wiring harness and connect the batteries as fellows.
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Old 07-17-17, 04:07 AM   #5
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I will try what @dilkes said. Is there no complete cabel that I can buy?
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Old 07-19-17, 09:01 AM   #6
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Good friggen question.

You need a pigtail from the battery manufacturer that plugs into the battery and has positive and negative cables on the other end. These go to the heavy gauge red and black cables on the controller.

There are 3 terminals on the battery picture you shared. you need to know which ones are positive and which ones are negative (not sure why there are three - I have seen some batteries that have 2 positive and one negative lead).

You need that pigtail or a schematic...
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Old 07-19-17, 09:02 AM   #7
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Quote:
Originally Posted by dilkes View Post
Of course if that is not the discharge port on the battery, ignore all of the above.
Looks like a charging port to me, but I'm just guessing.

OP: How do you charge the battery?
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Old 07-19-17, 09:26 AM   #8
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Looks like a charging port to me, but I'm just guessing.
Me too.

Some of these packs actually have a BMS that uses the same port for charge and discharge. Not sure about this one. There are 3 terminals there, just because that type of connector which is normally used for AC power has 3. The packs I have seen, the middle connector is unused.

If the OP could send a link to the description of where he purchased, there might be some clues there. Otherwise, just guessing.
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Old 07-19-17, 07:48 PM   #9
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Here's an example of a battery that uses that type of discharge port at:
https://www.aliexpress.com/item/1000...04.4.42.TB8S24

It uses that 3-prong connector for discharge and some kind of RCA connector on the charge side. No idea if this is the same as the OP's battery, but likely.
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Old 07-22-17, 12:41 PM   #10
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@dilkes Yes thats exacly the one i have.

Is this connected correctly? imgur"DOT"com/a/SY6nB (NEW MEMBER CAN'T POST URL) place "DOT" with a .

Its stil not working could anyone help me please!
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Old 07-22-17, 01:36 PM   #11
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Originally Posted by leprachun View Post
@dilkes Yes thats exacly the one i have.

Is this connected correctly? imgur"DOT"com/a/SY6nB (NEW MEMBER CAN'T POST URL) place "DOT" with a .

Its stil not working could anyone help me please!
I assume in your picture that the brown and blue wires you show come from the battery cable? Did you check the output of these to be sure which is positive and which is negative and that there is the right voltage there (36V or 48V)? Not to insult anyone, but you probably have to turn the key on on the battery as well.

You have also hooked up the throttle etc. to the controller?
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Old 07-22-17, 05:56 PM   #12
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I assume in your picture that the brown and blue wires you show come from the battery cable? Did you check the output of these to be sure which is positive and which is negative and that there is the right voltage there (36V or 48V)? Not to insult anyone, but you probably have to turn the key on on the battery as well.

You have also hooked up the throttle etc. to the controller?
HI dilkes thank you so much for helping me out I appreciate your activity on my thread.

No the brown and blue comes from and IEC320 cable that I cut the end off. I hooked the brown to the red and blue to black.

I can record a video tomorrow of all the wires. Perhaps it's easier to help that way.
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Old 07-23-17, 03:14 PM   #13
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have tried to turn battery to ON aswell stil no luck.

The battery has a LED indicator to see the charge and its fully charged too.

Im thinking maybe the controller is bad
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Old 07-23-17, 07:20 PM   #14
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A few quick q's and then I'm afraid I can't help much more:
  1. Are you sure that is the discharge port? There is a separate second port for charging?
  2. Did you or can you check with a multimeter that the voltage (is it 36V or 48V?) is actually being delivered to those brown and blue wires you mentioned? If you don't have a multimeter, you really should get one - they cost as little as $10.
  3. The controller is rated for the same voltage as the battery (36V or 48v)?
  4. All the other connections have been made? controller to motor, hall sensors, throttle?
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Old 07-24-17, 05:15 AM   #15
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A few quick q's and then I'm afraid I can't help much more:
  1. Are you sure that is the discharge port? There is a separate second port for charging?
  2. Did you or can you check with a multimeter that the voltage (is it 36V or 48V?) is actually being delivered to those brown and blue wires you mentioned? If you don't have a multimeter, you really should get one - they cost as little as $10.
  3. The controller is rated for the same voltage as the battery (36V or 48v)?
  4. All the other connections have been made? controller to motor, hall sensors, throttle?
battery is 48v so is the controller

yes all wires hooked up and i turn the battery to ON
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Old 07-24-17, 06:08 AM   #16
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made a video aswell perhaps someone can see the problem.

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Old 07-24-17, 07:53 AM   #17
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I can't tell from the video, but when you power everything on, did those lights on the throttle come on?
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Old 07-24-17, 08:03 AM   #18
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I can't tell from the video, but when you power everything on, did those lights on the throttle come on?
nope
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Old 07-24-17, 08:18 AM   #19
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nope
Please check the that voltage is being delivered where you have added the IEC320 plug (ie at the brown and blue wires). You will need a multimeter or voltmeter to do this. If there is no power there, nothing will work of course, and if those lights on the throttle didn't come on, that's what it looks like. It could be as simple as a bad fuse in the battery. See if there is a way to get at a fuse in the battery. If there is one, usually it can be accessed from outside.

Again, without seeing it, I am guessing somewhat, but my guess is no power is coming from the battery. (the lights on the battery can still show as charged)
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Old 07-24-17, 09:04 AM   #20
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Please check the that voltage is being delivered where you have added the IEC320 plug (ie at the brown and blue wires). You will need a multimeter or voltmeter to do this. If there is no power there, nothing will work of course, and if those lights on the throttle didn't come on, that's what it looks like. It could be as simple as a bad fuse in the battery. See if there is a way to get at a fuse in the battery. If there is one, usually it can be accessed from outside.

Again, without seeing it, I am guessing somewhat, but my guess is no power is coming from the battery. (the lights on the battery can still show as charged)
i don't have a multimeter atm i can try buy one tomorrow. This is starting to be a pain in the ass. I've been trying to get this **** ebike kit all summer just wasting my time and the summer is allmost over now
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Old 07-24-17, 09:34 AM   #21
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i don't have a multimeter atm i can try buy one tomorrow. This is starting to be a pain in the ass. I've been trying to get this **** ebike kit all summer just wasting my time and the summer is allmost over now
For anyone putting a kit on a bike, a multimeter is almost a prerequisite. Even before getting it, you might just have a look and see if there is a fuse in the battery that has blown.
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Old 07-24-17, 10:39 AM   #22
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For anyone putting a kit on a bike, a multimeter is almost a prerequisite. Even before getting it, you might just have a look and see if there is a fuse in the battery that has blown.
Yes i bought one now. i put the multimeter to DC and got this result (se image bellow)


http://imgur.com/buTt3ps

Last edited by leprachun; 07-24-17 at 10:43 AM.
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Old 07-24-17, 10:56 AM   #23
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The negative 052 reading suggests that the blue is positive and the brown is negative...assuming you have the red and black plugged into the correct place on the meter.

I believe this is opposite to what you thought? -- which is why we have multimeters.

Try reversing the connections to the controller and hope no damage was done by using the wrong polarity.
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Old 07-24-17, 11:12 AM   #24
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The negative 052 reading suggests that the blue is positive and the brown is negative...assuming you have the red and black plugged into the correct place on the meter.

I believe this is opposite to what you thought? -- which is why we have multimeters.

Try reversing the connections to the controller and hope no damage was done by using the wrong polarity.
The red and black can not be taken out from the multimeter so its showing correct.

are you sure that the blue is positive?

im really scared to blow the battery.

Ohh and do you have skype or something so i can ask questions much easier than coming here all the time?
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Old 07-24-17, 11:27 AM   #25
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Reverse the blue and brown wires attached to the multimeter and if the voltage shows as positive (or no sign), then the one attached to the red wire is +ve.
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