I have a friend who has an electric bicycle that is out of order.
She says the main problem is that when I connected to the charger, the charge lamp was red and now it’s green
To appear not to be charged. And then the engine went out of service. Sadly, she had no other means of transportation.
We are trying to help. How do you diagnose this failure?
If you connect another charger at this time, it usually works. The charger may also fail.
If there is no reserve, connect a voltmeter to the charging output. For a 48V battery, it is 54.6V, and for a 36V battery, it is 42.0V.
Then connect the meter to the battery output. A 36V battery is usually 30-42V, and a 48V battery is 40-54.6V. If the value is lower than this, the battery is bad.
Usually, these bikes have an old and worn-out battery. Spare batteries for Jetson are sold. If you have spare equipment, you may want to rent a regular bicycle. Jetson has a short range. If you are less than 6 miles (about 9.7km), a regular bike is enough.
Above nailed it. A voltmeter is less that $20 at Amazon (or many other places.
The battery is probably dead, not the charger. However, if you have a spare charger, it is worth trying it without spending money.
Jetson is the cheapest product and uses the cheapest battery cells that meet safety standards. Once a cell fails, the entire cluster stops working, and the battery protection system detects this and issues a “battery failure” signal.
Battery repair is generally impossible. Special tools are needed, since the cells are fixed with welding.
It seems that it’s time for friends to invest in a new battery or a decent ordinary bike.
When I checked the charger, it was 42V. Where can I check the battery output?
I ordered a new charger just in case. That’s a good suggestion. I’m going to check if there’s a bike in the garage that she can use.
Thanks working on checking the battery now
When I connected the new charger, it turned red and immediately changed to green.
Is this a sign that the battery has failed?
Do you know about the exchange cost and difficulty?
Thank you for your help.
This excludes the charger.
That is, either the battery is bad, or the bike’s controller is bad.
If you have a voltmeter and know how to operate it, you can check the battery. Switch to DC voltage mode (DC symbols are solid and dotted bars) and measure all combinations of battery terminals. Do you see a voltage of about 40V between any of the terminals? If it does not appear, the battery is completely faulty, which indicates that there is a malfunction in the bike’s controller.
Thank you for your help. How do I access the battery terminals?
It seems that all the wiring goes into the frame of the motorcycle from the battery.
Do I need to remove the battery cover?
I can’t find any wiring diagrams. It seems that Jetson will not make it public.
Has the Right to Repair Act been passed?
Take a look at electricbikereview’s Jetson forum (Randy Rides). An individual replaced a part of his bike (including the battery). He seems to have removed the side cover to access the battery and “connected” another battery. In this case, I wanted a maximum speed of 30 miles per hour (about 48km/h).
is it electricbike or is it electricbikereview. even searched randy rides and couldn’t find.
or is this on the jetson site?
I can’t find a review of electric bikes or information about Jetson.
Except for this forum I’m writing.
I think it is best to post links and pictures of the relevant bicycles. Is it probably this bike? The case is equipped with screws for fixing. Inside there is a controller (a silver box with wiring) and a battery. The shape of the battery is unknown. The picture shows the possibilities.
Be careful when opening the case. Keep the screws in a place where they are not lost, or in a place where they are not allowed to step on the bottle or box. Take a picture of the wiring condition in case the location of the wiring connection may be unknown.
At least once you’ve checked your battery, post that photo here. Then a picture of this awkward part will remain on the Internet.
The battery itself is probably a rectangular block like the picture, with two sets of wiring. One set is thicker and has a large yellow connector. This is the main power line, and the connector can be pulled apart, so the voltage can be checked at the terminal. The other pair is connected to the charger input on the case
That’s it. When I looked at the flashlight today, three of the six screws around the battery were gone.
So I opened it. Someone opened it in front of me. I needed to take a picture, but there was a yellow sticky note on the wiring and a label on it.
This was a mess. because she had bought it secondhand, and her friend had afterwards tweaked it.
I try to take pictures over the weekend. Because someone else may need it.
Judging from the pictures, it seems that this was modified two or three times by someone or several people.
The soldering of negative wiring to the battery is terrible. The throttle is replaced.
Some wiring is labeled, but the interior is basically messy.
If everything is original, you may risk trying to replace the battery.
It’s too much clutter in the current situation.