How To Fix Electric Scooter Battery?

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Electric scooter battery repairing

We are aware of how frustrating it is when you shake out the cobwebs on your e-scooter or e-bike after storing it for a while and it won’t start.

All batteries, including lithium-ion ones, naturally drain over time. Even if you do not utilize the associated electric scooter, the natural discharge will still occur quickly.

Now, what do you do? Without a functional battery, the pricey e-scooter is effectively made of scrap metal. When you check with the scooter shop, you discover that the replacement battery pack is expensive. At least one-third of the total cost of an e-scooter is spent on good batteries.

We can explain how to revive that perfectly fine battery. Before you attempt to resuscitate that battery, you must, however, make sure that certain prerequisites are met.

Why isn’t the battery in my Electric Scooter Charging?

There are two causes for an e-scooter battery not to charge. Firstly, the battery cannot be fully charged due to several issues, including a bad charger, wiring, or charger port.

Secondly, the battery is over-discharged and has depleted to a point where it cannot be recharged. It occurs if a battery runs down or is not recharged for an extended time after being stored with a full charge.

The battery can no longer hold a charge if it is fully charged but does not switch on the electric scooter. It may also be the reason why batteries operate a car inefficiently or power an e-scooter for only a limited period.

Initial Conditions Check For Restoration

restoration of battery

The residual voltage for a 36V battery pack should be at least 20V while the same residual voltage for a 48V battery pack should be at least 26V. Using a multimeter, you may check the voltage on the battery pack.

There should be no sign of water stains on the battery pack and it should not be exposed to dampness. The battery pack will need to be opened, and if there is any moisture or water, it could result in a short circuit, which is what we want to prevent.

You don’t experience a bloated battery pack as battery bloat indicates defective battery cells, which must be disposed of according to the right procedures.

Your e-scooter or e-bike must be stored in a cool, protected area with a temperature limit of 40 degrees Celsius. Therefore, if the battery pack has been resting in your trunk while you’ve been driving through some outback, it is advised to dispose of it according to the correct procedures.

Procedure To Fix The Electric Scooter Battery

The following are the crucial elements in this sensitive operation:

  • Jumper cables
  • Power Supply (Direct Current)
  • Heat Shrink Wrap Pen Knife
  • Screwdriver
  • Silicone gun

Mentioned below are the steps to fix the electric scooter battery:

1. Taking the Battery Pack apart

Use a pen knife to make slits along the edges of the package if your Li-ion battery soft pack looks like the one below. Use utmost caution when performing this.

Don’t cut too deeply to avoid unintentionally puncturing the battery cells within. Do not attempt to cut open a Li-Po battery if it is located on the right side, though.

You would need to use a screwdriver to remove any screws from a hard case battery, which can come in a variety of shapes, and a flat head screwdriver to pry open the shell. A silicone seal would occasionally be present. If so, a pen knife would be required to cut the seal open.

2. Link the Cables to the DC Power Source

When the case is opened, a PCB protection board similar to the one below is seen. Look for the two major Black and Red wires, which are indicated below by arrows.

The black wire is typically at one end and the red wire is typically at the other end of the PCB. They are often thicker than the other wires because they are the major charging cables.

Set your DC power supply’s charging parameters at 30 volts and 0.15 amps of current. Red and black wires from the DC Power Supply should be connected to the red and black wire probes.

You will need to cut a small hole in the red and black wires to attach the probes if you do not have the needle probes.

You will observe that the voltage will first rise quite quickly once the probe is connected and the DC Power Supply will start charging. Do not be concerned if it takes a lot longer for the voltage to climb because the rise will progressively slow down.

When any one of these three circumstances occurs, halt charging:

  • A 36V battery pack and a 48V battery pack both reached 30V and 39V of voltage, respectively.
  • Whenever the charging current has decreased to 0A.
  • When charging takes a long time but the voltage does not rise above a particular level. It indicates a dead battery cell, which is a completely different subject entirely.

Take the charging probes out of the PCB’s wires. Use a glue gun to seal any holes in the black and red wires that you may have made, and then insulate the wire.

3. Battery Pack Repacking

The seams on the hard case battery pack should be sealed with silicone or adhesive and pressed back firmly. If necessary, swap out any screws.

Replace the old heat shrink wrap with a new one and shrink it to fit soft battery packs using a hot iron or a hair dryer. Apply silicone to the shrink wrap’s seams after it has been firmly set, as shown in the photo below.

4. Charge Regularly by Employing a Charging Adapter

Use the original charger that was included with the e-scooter to charge the battery pack normally once it has been sealed until it is fully charged.

A 36V battery has a full voltage of 41V, while a 48V battery has a full voltage of 52V. Once the charger has shown that a full charge has been achieved, check the voltage using a voltmeter or multimeter. There you have it, then! By taking these actions, you can save yourself a few hundred bucks. 

Where To Find Repair For Your Electric Scooter Battery?

The typical approach, especially if the battery is severely damaged, is to replace the battery after determining the source of your broken battery. For a do-it-yourself electric scooter battery replacement, consult a tutorial on how to replace an electric scooter battery.

To change the battery on your e-scooter, it is recommended to take it to your neighborhood mechanic, especially if you are a new owner. To get the same original battery or have it fixed, get in touch with your neighborhood retailer or the maker of your e-scooter.

Get an expert e-scooter from some workshop to handle these tasks for you if you lack the confidence to complete them yourself.

Conclusion

We hope that this article has helped you understand how to fix an electric scooter battery. While it may seem like a daunting task, with the right tools and instructions, it is quite easy to do. With a little bit of elbow grease, you can have your scooter up and running in no time.

If your electric scooter battery is giving you trouble, don’t despair. With a little troubleshooting, you should be able to get it working again in no time. Whatever you do, don’t give up on your scooter, with an effective strategy, you’ll be back on the road in no time.

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