Do you know the method to repair electric vehicle battery?

Open the battery cover and remove the 6 helmets. As shown in figure:

Fill each hole with distilled water with a syringe. If 1.28 standard electrolyte is added, the plate may burn out due to high acid dissolution. For example, when we eat hot pot, why do we eat it more and more salty? That is to say, when the water evaporates, the salt will not evaporate through the water vapor. Similarly, the acid in the battery will not be evaporated. As shown in the figure:

How to repair an electric car battery.

Let the battery rest for half an hour after filling to allow the spongy body around the plate to absorb water. Then reoccupy resistance discharge, put the electricity in battery, put completely, do not have resistance, can replace with a bulb of 12v, be like: autocycle headlight, car turn signal ok, want to be able to have discharge to the effect of 0v only. How to judge the battery is close to no electricity, cement resistance discharge at the beginning of resistance body hair hot, slowly gradually not hot, then the battery is also no electricity. Bulb, but also direct, as long as the light slowly not bright, it means that the battery discharge is over, the discharge time depends on the capacity of the battery discharge, we can first put the battery to no power when maintenance, this can shorten the discharge time. As shown in the figure:

How to repair an electric car battery.

After the discharge, the battery can be charged with pulse charging mode, because the pulse charging mode can effectively remove the vulcanization of the electrode plate and improve the capacity of the battery. Do not have also can use a car to fill replace.

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

How to repair an electric car battery.

After charging, use a syringe to draw out excess water from each hole. 6 holes in total, step by step. As shown in figure:

How to repair an electric car battery.

6,Put the cap and lid on, then load the car.

If the battery appearance is not damaged or swollen, and there is no sign of short circuit or circuit break, the following methods can be adopted to try to repair the battery:

1. Use positive and negative pulses to charge the battery for depolarization, and then completely discharge the battery, so that the cycle is three times, if the capacity shows signs of recovery, you can cycle several times, to achieve better repair effect.

2, add water repair, add water must add deionized water or pure water, do not add tap water, will cause self-discharge battery problems.

1. Discharge the battery completely first, because the acid density inside the battery is basically less than 1.1g/mL after discharge;

2. Take out the cover sheet and remove the safety valve. Please keep it well and do not dirty the safety valve for later use.

3. Add water. Generally, the water content of a single cell of 12AH battery is 8 ~ 10g, and that of a single cell of 20AH battery is about 15g;

4. Let it sit for about one hour and install the safety valve and cover plate;

5, charge, full charge and then complete discharge, such a cycle three times, the capacity will be well developed.

Lead-acid batteries should be:

1, the battery must be fully charged before use, and under the premise of full power generally recommended in 2 to 3 months must be charged to the battery, if conditions are best 1 to 2 months to charge.

2, electric cars in need not when, should be stored in ventilated cool room, after a full charge the battery pack to disconnect the load line, the sulfuric acid salinization due to self-discharge of lead-acid battery itself will, if long time don't add electricity capacity recovery is difficult to make impact longevity, so general advice in 2 ~ 3 months must give added battery, for the battery life.

Want to detect first all damage reason, sulfide with the machine, broken case open repair, simple method is to add liquid charge.

(1) methods and steps

(1) with the thin film will be covered above the single battery plastic film opened, revealing the inside of the sealing valve.

(2) round sealing valve is located on the surface of the battery box is the center, generally there is a small bonnet, there is a sealing mechanism, the manufacturers sealing mechanism is not the same. Remove the bonnet and carefully remove the sealing material inside. At this time, pay attention to the sealing material and its sequence. Do not make a mistake and do not break the sealing material.

(3) the sealing valve all open, you can see the internal part of the situation, estimate the degree of drying electrolyte.

(4) use a glass tube to absorb the amount of distilled water has been added to the additives, and from the sealed mouth into the battery. Note that each battery water injection as consistent as possible, in order to measure the degree of drying up, the degree of severe drought, to fill more water.

(5) when the water injection, monomer battery should be flat, namely fell to seal in the horizontal direction, the aim is to get the amount of water to make each single cell battery, with the increase of water injection, seal shall be gradually raised, to a certain extent, set up the battery to see whether the water above the plate, are over and over the top 5 mm plate to stop water, rest for a few minutes to observe the surface of the water, if stability is no longer with water, otherwise, continue to add water to 5 mm, higher is injected too much, avoid obstruction of air flow in the crust; finally, the injection rate for record.

6 temporary cover sealed mouth, to prevent impurities fall. If the water level drops again, it should be supplemented to a height of 5mm. After that, it should be charged. It is better to charge it a little more than normal charging ratio. Stop charging when the terminal voltage is reached.

7 with the battery detector or homemade dashboard monitoring discharge, determine the battery capacity, voltage, also can be used to discharge, and record comparison.

Is repeated twice charge and discharge, and carefully measured data, contrast charging time, voltage change speed and capacity recovery, see if it has been close to normal or has picked up.

9) water control: to confirm the obvious effect, the battery was finally charged and kept still for 1h, and the battery was inverted on a plastic container of suitable size to catch water to control the excess water.

Attending the comparison of the individual battery, the basic close, comes the water injection.

(2) matters needing attention

(1) in the life of the lead battery, should not open the seal valve, the original seal valve has a fixed open valve pressure and closed valve pressure, after literally moving, the seal valve is not open and closed within the specified pressure range, the open and can not open, the closed and failed to close, it lost its role. If the pressure is reached but fails to open, the battery shell may be damaged or burst. If the valve is not opened frequently and the pressure is not reached, the electrolyte evaporation will be accelerated and external impurities will be easy to enter. Both can damage the battery.

(2) without professional knowledge of the user do not open the sealing valve, to prevent the case of acid mist spill, damage to the eyes or skin. Some electrolytes are mixed with some high-efficiency long-life additives, open the sealing valve, some volatile components will be volatile in a short time, thus changing the composition of the electrolyte, reduce its efficiency.

The page contains the contents of the machine translation.