What is the reason that electric car battery can't be charged?

Recently, a friend asked me why his electric vehicle cannot be fully charged. As a car repairer for many years, I am telling you today that there are four main reasons why electric vehicles do not charge.

1. Check if the loop connection is in good contact and mix the charger.

When charging, check whether the socket and the charging cable are working properly, and avoid the situation that the socket is out of power and loose. When charging, apply the charger of the electric vehicle itself to avoid using the charger of other models and models, resulting in invalid charging.

2. The inner plate of a battery is broken.

For the lead-acid battery pack, if the charger and the battery line are normal but not charged, there is no doubt that the internal plate of a certain battery is broken. Judgment method: Find a high-power light bulb with the same rated voltage as a single battery (such as 12V battery to find a 12V60W to 100W car headlight bulb), respectively, connect to both ends of a single battery, which amount is normal, see the voltage The bulb does not light up when tested, and which one is bad. Find a battery of the same type that is slightly larger than other battery packs and fix it.

3, the battery is seriously bulging, causing the electric car to charge without electricity

The drum pack battery can be measured first to check if it can be reused. How to fix it? Open the battery compartment and open the closed filler cap on the battery (do not lose the rubber cap on the filler) to see if there is any liquid. Pipette 5 to 10 ml of distilled water, add the injection hole, and add them one by one until the liquid has just passed over the electrode plate, and the water level indication on the outside is better. Add all the water injection holes and check that the water level is not too high. Cover with a plastic cover, charge directly, charge for 5 to 7 hours, check for changes. Recover the battery and battery case and load the car.

4, the battery is placed for too long, resulting in a low voltage, the charger cannot be charged

The battery does not receive much damage for a long time. It is common for the battery to go into a sleep state, so that it cannot be used normally, or worse, the battery inside the battery is dry. For this kind of situation, the easiest way is to try charging with a low-type charger, and after the voltage is up, replace the original charger.

Of course, if the electric car is not charged, the charger may be broken. For such cases, it is recommended to replace the charger. In fact, in daily life, as long as we pay attention to the maintenance of electric vehicle, its life expectancy will be longer.

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