Repair method of electric vehicle lithium battery

Open the battery cover and remove the 6 helmets.

Fill each well with distilled water with a syringe. If 1.28 standard electrolyte is added, the plate may burn out due to excessive acid solubility. For example, when we eat hot pot, why do we eat more salty? That is to say, when water evaporates, salt does not evaporate through water vapor. For the same reason, the acid in the battery will not be evaporated. It's water, so we just need to add about 20-30ml of distilled water to each hole.

After filling up, let the battery stand for half an hour, so that the sponge around the plate fully absorbs water. Then use the resistor discharge to discharge all the electricity in the battery. If there is no resistance, you can use a 12v bulb instead. For example, motorcycle headlights and car turn signals can be used as long as they can discharge to 0v. . How to judge that the battery is almost out of power, the cement resistor is discharged at the beginning of the resistor body, slowly and gradually not hot, then the battery will be out of power. If the light bulb is too direct, as long as the light is slowly turned off, it means that the battery discharge is over. The discharge time depends on the capacity of the battery when it is discharged. We can first maintain the battery when it is not powered. This can shorten the discharge time.

After the discharge is completed, the battery is charged. The pulse charging method can be used under the condition that the pulse charging method can effectively remove the vulcanization of the electrode plate and improve the capacity of the battery. No one can replace it with a car charger.

As shown in the figure: (charge the battery) Take pulse charging as an example.

After the charging is completed, use a syringe to withdraw excess water from each well. A total of 6 holes, completed step by step.

Cover the hat and lid to load the car.

Electric vehicle lithium battery usually at least ten sets or more lithium battery in series, and the battery protection board included, completely different from the lead-acid battery (a small number, typically no protection board), if a failure occurs, the non-technical People generally cannot solve it.

Damage to the lithium battery pack of an electric vehicle generally includes such a situation:

1. The battery protection board is damaged, the above electronic components are dense, and it is generally difficult to repair;

2, the battery protection board is intact, the performance of a single battery is worse, it is not easy to find;

3, the battery protection board is intact, individual batteries are short-circuited, to be investigated;

In short, after the failure of the lithium battery of the electric vehicle, the maintenance is difficult, usually after the sale, the technical staff of the manufacturer solves, or replace the lithium battery pack of the same type of electric vehicle.

Repair the battery with an electric car battery charger:

The voltage and current of the electric vehicle charger are matched with the model and specifications of the electric vehicle battery. Therefore, it is not possible to repair the battery pack with the car charger, and it is only necessary to use the electric car charger with the largest power. Example: 1, electric vehicle battery pack specification is 48v20AH, can be repaired with 60V20AH battery charger; 2, 48v12AH battery pack, can be repaired with 48v20AH battery charger.

Repair principle: The main reason for the decline in battery performance is that the battery has been vulcanized, and the battery manufacturer's after-sales maintenance battery. All kinds of battery repairing instruments and repairers on the market use high-power charging equipment, using "high current, high pressure" to remove sulfurization. , repair the battery. Therefore, the ordinary charger with the power of the first one has the function of removing sulfur from the battery.

Other methods:

Repair the battery with the hot water of the dry cleaner

The majority of electric vehicle users are aware that electric vehicles are not far away and need to add distilled water to repair and repair batteries. However, the pure water and various replenishing liquids and repair liquids sold on the market have a short-term effect on the battery, and then the performance of the battery is degraded and scrapped in advance. Because these liquids contain metal ions and impurities will corrode the battery plates, causing the battery to self-discharge and the active material to fall off, resulting in permanent battery retirement.