Common battery failure and battery repair measures

　　Author ：Iflowpower – Portable Power Station Supplier

Common battery failures and battery repair measures 1. The imbalance of the battery: Most lead-acid batteries are not used alone, but multi-blocks are used together, such as: "Electric vehicle battery is usually three or four pieces together", a set of batteries appear or two backwards, It will cause other good things that can not be used normally, this is unbalanced. Battery restoration method: find capacity, voltage, self-discharge, battery resistance, etc.

2. Battery is waterless: during the battery charging process, water electrolysis, sprouting oxygen and hydrogen will occur, so that the water is lifted in hydrogen, oxygen, so it is also known as. Water is in a battery electrochemical system, which plans a very important use, and the reduction in water will reduce the ion activity involved in the reaction, reducing the contact area of ​​sulfuric acid and the lead plate, resulting in rising battery internal resistance, polarization, and ultimately leading to battery capacity.

Battery repair method: open the cover above the battery. Some battery covers are ABS adhesive, some batteries are connected to. Some is a skateboard.

Don't damage the cover when you pay attention to the open cover. At this time, you can see the rubber cap of 6 exhaust valves. Open the rubber cap, expose the exhaust hole, can see the inside of the battery through the exhaust hole.

Some battery exhaust valve bases can be rotated, and can be rotated open the exhaust valve base without opening the rubber exhaust valve. Some fillers around some batteries. Open the cover, use the flashlight, see if there is a dry phenomenon in the small hole, that is, the battery is not lost.

The polar plate of the battery is wrapped in white glass fiber cotton, and the normal situation should be humid. Insert distilled water with a dropper is injected into the battery from the exhaust hole. Put the water-added battery with a breathable shield to the exhaust hole, and the dust falls into the exhaust hole.

It is best to use medical secondary distilled water. The principle of hydrating is Ning less than many. Not enough, more, more acid specific gravity decline, battery capacity is less.

No relevant experience can be grasped by 5ml each well. It is best to look at the plus, wet, bright crystalline, Water Wang. Wet is just right, bright crystals, and the water is too much.

Special note: hydrating tool uses straws such as glass, plastic. Propose medical disposable syringe, easy to use and convenient. The hydrating tool does not use any metal-containing instrument, the syringe should be pulled to the metal needle, and the plastic tube is used.

3. Battery sulfate: When the battery is discharged, the positive electrode negative is born, and the positive electrode is extremely easy to convert when the oxygen polar oxidation is used to transform into a lead in the charging, and the negative electrode is different, and the long-term loss is preserved. In the case where there is often a factor such as discharge and long-term charging, a layer of dense harden sulfate layer is gradually formed, not only the solubility is substantially lowered, but it is difficult to participate in the reaction while blocking the electrolyte and deep active substance.

Contact channel, resulting in a decrease in battery capacity. Battery Repairing Measures: Use the vulcanized battery to repair the pulse repair instrument, using high pressure (30V-50V) pulse (8330 Hz) small current (1% -2% of the battery nominal capacity) in a manner, 10 to 20 hours Time, remove hard sulfate in the battery. 4.

Polar softening: The polar plate is a substance of a multi-void, and has a large specific surface area larger than the electrode itself, during the charge and discharge cycle of the battery, will be extremely converted with the alternating transformation of different substances on the polar plate. The board rate is gradually declined. On the appearance, the surface of the positive plate is the solid gradual loose soft until the start of the start until it becomes a paste.

At this time, due to the decrease in surface area, it will result in a decrease in battery capacity. Large current charges, and over-discharge will accelerate the softening of polar plates. Battery restoration method: After the battery is discharged from 10.

5V, use the bulb to discharge 1-5 hours. The activation unit is then carried out with an activator. 5.

Bar grid corrosion: The skeleton plate of the battery is made of lead alloy, although it has strong corrosion resistance, but long-term soaking is in acidic electrolyte, it will still cause metal corrosion to occur in the grid. Fracture or even break, resulting in a decrease in capacity. 6.

Short-circuit of the battery: The positive and negative plates should have been separated by the diaphragm (board), but if there is a solder slag or dendritic crystal penetration, the positive negative plate is ideal, forming a short circuit, a severe short circuit can cause the monomer voltage. For zero, if the material itself causes the material itself, the resistance is large, such as dendrites, will not immediately turn the single-cut voltage to zero, but a fast self-discharge, commonly known as soft short circuit. Sign in.

Opening of the battery: Generally occurring in a bus welding and polar welding and terminal welding phase, the expression is usually not completely broken, but the soldering, at this time, the sprout will have a large internal resistance, resulting in a decline in battery capacity. The battery is likely to be normal in all aspects. It is often used for a period of noise, which is usually due to the welding, there is a fissure, which is in the process of use, and this area will sprout the top corrosion.

Fracture increases at a faster speed. Battery repair method: 100A test battery voltage 0V is open, with a single measurement method, measure the place, welding. .