What Is the Battery Manufacturing Process?

With the rapid development of electric vehicles and automobiles, the power supply on the vehicles has also developed rapidly, but there are many problems in the production of batteries, which has caused the uneven quality of battery products in the market and the cycle life of battery capacity in the later period. The design life cannot be achieved, which is greatly related to the battery's unique production process in production. The structure of the battery is composed of a casing, an upper cover, an electrode plate, a separator, a bus bar, an electrode post, a bridge protection plate, and terminals.

Battery production process

Right!

With the rapid development of electric vehicles and automobiles, the power supply on the vehicles has also developed rapidly, but there are many problems in the production of batteries, which has caused the uneven quality of battery products in the market and the cycle life of battery capacity in the later period. The design life cannot be achieved, which is greatly related to the battery's unique production process in production. The structure of the battery has a case, an upper cover, an electrode plate, a separator,

Plate weighing

1. Welding of clusters. Welding is to weld the positive and negative electrodes together with lead to form a cluster. Oxygen-acetylene is used in the tool that connects the pole and the bus bar together.

2. Put the wrapped plates in the cluster box. After inserting the plates in the cluster box into the comb plate, insert the negative pole first and the positive pole so that the ears are fully inserted into the comb plate. If it is not in place, manually sort it out, and then put the bars, bridge posts, and pole posts between the positive and negative ears.

3. Turn on the acetylene and oxygen of the welding torch and ignite, and adjust to the appropriate size. The welding torch and the electrode are moved to the position of the pole, and then the lead and the pole are melted. After the bus bar is basically welded, the pole and the bus bar are welded together. If there are impurities such as lead ash during welding, false soldering and virtual soldering will be found. Welding of poles and busbars is a key process in the production process. Welding must be firm, no soldering, and false soldering . At this time, the impurities must be removed while welding, and the bus bar is finally filled up.

4. After welding the busbars, check that there are no defects and then enter the slotting process. Generally, the clusters with terminals are installed first, and then installed in other clusters. The positive and negative electrodes are arranged as +-, +-, +-, +-, +-, +-Are connected in series, don't put wrong polarity.

It must be installed at the bottom when the plate is installed, and then it is checked whether the bridge post is normal. If it has been moved manually, it is completed to test whether the upper cover can cover the basic cluster lower slot.

5. How to check the pole group, first of all, let's use a multimeter to measure whether the battery is short-circuited. If the voltage is zero or close to zero, the battery is shorted. Check that the positive and negative poles of the multimeter are connected properly if there is no short circuit. If the displayed voltage does not appear negative, if it is, prove that the polarity is reversed, and then reinstall it in the battery slot.

6. The pole plate welding is the key one if no faults are detected by the electrode plate. The bridge column is clamped by bridge welding, and the bridge column is welded by oxygen welding. When welding, the flame must ensure that the battery case is not burned, and that there is no false welding, virtual welding, poles out of the cluster, and the lid can be closed smoothly. The battery cover is hermetically sealed, and an epoxy resin glue and a curing agent are used in a 2: 1 ratio. The prepared glue should be used in time to avoid long time solidification. The solidification of the colloid has a great relationship with the temperature. The higher the temperature, the faster the solidification, so use it as soon as possible. There is a heating device for capping.

7. After the battery cover is completed, perform pole welding, and check whether the lead pole is in the middle of the lead hole. If it is not, correct it. Put the pole mould on the lead pole and then melt the pole with oxygen welding. There is also another type of soldering. Put the terminal on the lead pole and place it in the correct position. Use a soldering iron to melt the solder wire and weld the terminal and pole together. Pay attention to false welding and false welding when welding.

Battery production process , electrolyte configuration

The electrolyte of lead battery is made of pure water and concentrated sulfuric acid.

1.280 ± 0.005g / cm3 ((25 ).

Coty electrolyte

The container for preparing the electrolyte must be acid-resistant and temperature-resistant glazed ceramics, glass tanks, plastic tanks or lead-lined wooden tanks. When preparing, the staff must wear protective gear;

Wash the utensils before preparation and wash with pure water;

When preparing the electrolyte, the required pure water should be put into the container first, and then concentrated sulfuric acid should be slowly poured into the pure water and continuously stirred. It is strictly prohibited to inject water into the sulfuric acid to avoid splash burns.

The conversion formula is d25 = dt + 0.0007 (t-25)

D25: electrolyte concentration at 25 ° C dt: electrolyte concentration at temperature t

0.0007: Temperature coefficient t: Measured electrolyte concentration

1. The composition of the electrolyte is mainly distilled water and sulfuric acid. When configuring, the container must be acid-resistant and clean.

2. Staff must be aware of safety and wear acid-resistant gloves and clothing when working. If sulfuric acid splashes on the skin during operation, the skin should be repeatedly washed with water in time. During the configuration, first pour distilled water into a clean container, then slowly introduce concentrated sulfuric acid, and use acid-resistant tools to stir. If the temperature is too high, stop adding acid to prevent the temperature from being too high, and the acidity can be splashed. At a temperature of 25 ° C, it can be adjusted to 1.1: 28. Do not pour water into the acid during configuration.

3. According to the battery capacity of the added acid, the capacity of the battery case, the density of the acid, and the loss of the battery during charging and discharging, the amount of acid can be calculated, because the acid is no longer pumped out after charging and discharging.

Battery production process

Unscrew the vent plug, make sure to penetrate the vent hole on the plug, and there is a gasket and sealing paper under the plug, which need to be removed after pouring acid;

The temperature of the electrolyte must be cooled below 30 ° C and poured into the battery;

Fill the prepared electrolyte into each cell. The liquid level of the plastic case battery is flush with the mark "max" of the case. The liquid level of the rubber tank battery should be 10-15mm higher than the separator;

Tighten the exhaust plug to prevent acid leakage.