How to repair batteries in old battery cars

Battery repair technology is the maintenance of batteries with degraded or failed performance by physical or chemical means. By repairing the battery, the battery capacity can be restored, which can effectively extend the battery life and improve the performance of the battery.

For the technology of the waste battery repair technology Shandong Hengli battery repair, Shandong Hengli battery repair technology for the non-physical damage of the battery, such as the chemical reaction caused by the vulcanization, salinization, plate aging, softening, water loss, thermal runaway, plate active material shedding and other phenomena have excellent repair results.

The particle LCD intelligent voice program-controlled battery repair equipment is specially designed for the detection and repair of electric vehicles, motorcycles and automobile batteries. This equipment adopts the international leading particle wave repair technology, and the repair effect is improved compared with the ordinary repair equipment. It is the best repair equipment for various lead-acid batteries. Shandong Hengli battery repair equipment uses liquid crystal display and operation voice prompts, luxurious style, is the necessary equipment to open professional repair shop.

Utilizing the latest particle digital program control technology and international leading edge theory, it can effectively restore the vulcanized battery. This technology combines physical and chemical elimination vulcanization methods to effectively remove the sulfide of the battery plate and clean the battery at all times. The purpose of the plate is to better maintain, maintain and repair the lead-acid battery, keep the plate state new, make the battery capacity output relatively stable, can completely and completely change the sulfation of the battery to maximize the life of the battery.

Shandong Hengli battery repair has the most reasonable and advanced technology, which can restore the battery capacity after vulcanization to 90-100%, and can reach 25-70 kilometers after repair, which basically meets the requirements of the new battery travel distance. Repairing the battery's power consumption is only 2-3 degrees, the whole repair process is simple, and the price is not expensive.

The battery of a battery car generally takes less than two years. This is the words of laymen who lie to laymen. I have deceived a lot of people with a fully enclosed battery.

The general battery can be repaired with battery replenishment, why not fully enclosed battery car battery. Reporting the mentality of the dead horse as a living horse doctor, I opened the battery.

I don't know if I can see that the original so-called full-closed one is the same as the ordinary car lead-acid battery. It can be repaired with battery replenishment. Battery replenisher, 2 yuan a bottle, motorcycle market has sold, about 450 ml. A bottle can usually repair a battery car, a set of 4 batteries.

Teach you how to repair the battery!

Tools/raw materials

Battery replenishing liquid needle-nosed pliers word screwdriver Phillips screwdriver syringe tape rag

Step / method

First open the cover on the battery, because the glue is usually opened and the cover is broken.

There are 6 small holes in the inside, covered with a rubber cap, and take it away with the surrounding white absorbent cotton.

Teach you how to repair the battery!

Use the injection syringe, add about 25 ml of replenishing solution to each small hole (depending on the lack of liquid in the personal battery, be careful not to exceed the upper plate or the liquid inside the charging will be full, because the liquid will boil when charging, plus If you have more, you will get back.) Pay attention to the ventilation of the holes, otherwise you will not be able to add them.

Teach you how to repair the battery!

Dry the surrounding leaks, restore the cap, and absorb the cotton. Wrap the battery in tape. At this point, your battery can be used for another two years. OK!

Teach you how to repair the battery!

Open the battery cover and remove the 6 helmets. Figure:

How to repair electric car batteries?

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. What is missing is water, so we just need to add about 20-30ml of distilled water to each hole as the picture shows:

How to repair electric car batteries?

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. as the picture shows:

How to repair electric car batteries?

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.

How to repair electric car batteries?

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

How to repair the old battery depends on the condition of the battery itself. According to the different damage degree of the old battery, the corresponding repair method is selected for repair, so that a standard repair can be achieved. To understand the old battery repair, you can first understand the battery failure mode:

Failure mode of lead-acid battery

Due to the differences in the types of plates, manufacturing conditions, and methods of use, the causes of battery failures ultimately vary. To sum up, the failure of lead-acid batteries is as follows:

1. Corrosion modification of positive plate

At present, there are three types of alloys used in production: traditional lead-bismuth alloys, the content of niobium is 4% to 7% by mass; low niobium or ultra-low niobium alloys, the content of niobium is 2% by mass or less than 1% by mass. The fraction contains tin, copper, cadmium, sulfur and other modified crystal agents; the lead-calcium series is actually a lead-calcium-tin-aluminum quaternary alloy with a calcium content of 0.06% to 0.1% by mass. The positive electrode grid cast by the above alloy is oxidized to lead sulfate and lead dioxide during charging of the battery, and finally causes the loss of supporting active material to cause the battery to fail; or lead is formed due to the formation of the corrosion layer of lead dioxide. The alloy generates stress, which causes the grid to grow and deform. When the deformation exceeds 4%, the entire plate is been destroyed, the active material is not in contact with the grid and falls off, or short-circuited at the bus bar.

2. The active material of the positive electrode plate falls off and softens.

In addition to the growth of the active material due to the growth of the grid, as the charge and discharge are repeated, the bond between the lead dioxide particles is relaxed, softened, and peeled off from the grid. A series of factors, such as the manufacture of the grid, the tightness of the assembly, and the charge and discharge conditions, all have an effect on the softening and shedding of the active material of the positive electrode plate.

3. Irreversible sulfation

When the battery is over-discharged and stored for a long time in a discharged state, its negative electrode will form a coarse, hard-to-charge, lead sulfate crystal. This phenomenon is called irreversible sulfation. Slight irreversible sulfation, there are some ways to recover it. In severe cases, the electrode fails and does not charge.

4. Premature loss of capacity

When low-lying or lead-calcium is a grid alloy, a sudden drop in capacity occurs in the initial stage of use of the battery (about 20 cycles), causing the battery to fail.

5. Severe accumulation of strontium on active substances

The enthalpy on the positive grid is partially transferred to the surface of the active material of the negative electrode plate along with the cycle. Since the reduction of H+ on the yttrium is about 200 mV lower than the over potential reduction on lead, the charging voltage decreases when yttrium accumulates. Part of the current is used for water decomposition, and the battery cannot be charged normally and thus fails. The ruthenium content of the negative electrode active material of the lead-acid battery which has a charging voltage of only 2.30 V has been tested, and it is found that the content of lanthanum in the surface layer of the negative electrode active material is up to 0.12% to 0.19% by mass. For some batteries, such asspecial batteries, there are certain restrictions on battery hydrogen evolution. For the battery negative electrode active substance test with hydrogen evolution exceeding the standard, the average strontium content reached 0.4% by mass.

6. Heat failure

For less maintenance batteries, the charging voltage is required to not exceed 2.4V. In actual use, for example, in a car, the voltage regulating device may be out of control, the charging voltage is too high, and the charging current is too large, and the generated heat will increase the temperature of the battery electrolyte, causing the internal resistance of the battery to decrease; the internal resistance is decreased. The charging current is enhanced. The temperature rise and current of the battery are mutually enhanced, and eventually it is uncontrollable, causing the battery to deform, crack and fail. Although thermal runaway is not a failure mode that is often caused by lead-acid batteries, it is not uncommon. Pay attention to the phenomenon that the charging voltage is too high and the battery is hot when in use.

7. Negative busbar corrosion

Under normal circumstances, there is no corrosion problem in the negative grid and the bus bar, but in the valve-regulated sealed battery, when the oxygen circulation is established, the upper space of the battery is basically filled with oxygen, and the bus bar is somewhat the electrolyte along the pole. Climb to the busbar on the ear. The alloy of the bus bar will be oxidized to further form lead sulfate. If the bus bar alloy is improperly selected, the bus bar has slag inclusions and gaps, and the corrosion will deepen along these gaps, causing the tabs to be disconnected from the bus bar and the negative plate to fail.

8, the diaphragm piercing caused short circuit

Individual membranes, such as PP (polypropylene) diaphragms, have large pore sizes, and PP fuses will be displaced during use, resulting in large pores. Active substances can pass through large pores during charge and discharge, resulting in micro-short circuits to disable the battery.

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