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Two of them are of the same color as the positive pole, and the other two are the negative pole. Their function is to be used on the device. One positive and negative pole is connected to the device for discharge, and the other two positive and negative poles are exposed for charging!

Just connect 1 and 4 directly. These two points have the highest voltage and should be the positive and negative poles of the power supply, which should be marked. The other two wires should be temperature detection terminals to provide over temperature protection. 1+4-,

Two of them are of the same color as the positive pole, and the other two are the negative pole. Their function is to be used on the device. One positive and negative pole is connected to the device for discharge, and the other two positive and negative poles are exposed for charging! (Because we are currently producing this battery and I am responsible for it)

\Various equipment used in the battery production process. The structure of a battery consists of components such as an outer shell, upper cover, electrode plate, partition, busbar, pole, bridge protection plate, terminals, etc. Below, we will introduce the battery production equipment based on the battery production process.

Polar plate weighing

Firstly, the internal plates of each battery need to be weighed and matched. The capacity of each cluster must be equal, otherwise the group with small capacity will be fully charged in advance due to its small capacity, while the group with large capacity will not be fully charged yet. The terminal voltage of the battery is low, and the total voltage will continue to charge until it reaches the termination voltage, causing the group with small capacity to form overcharge. If the group with small capacity loses its charge in advance when the battery is discharged, and the terminal voltage of other batteries is high, the total voltage of the battery does not have the termination protection voltage of electric power assistance. The discharge continues, but it causes the battery to over discharge. Overcharging and discharging of batteries, as well as untimely charging, can affect the service life of batteries. However, the capacity of the smaller battery group further decreases, and the decrease in battery capacity further leads to overcharging and discharging of the group. This cycle causes the battery capacity to quickly decrease and be scrapped.

Required equipment introduction: weighing instrument, assembly machine, electrode short circuit tester, electrode welding mold, electrode welding tool, etc.

2. Treatment of the electrode plate before weighing

Before weighing the electrode plate, it is necessary to remove any excess front edges, burrs, and excess active substances during the application of paste. If not cleaned properly, it may cause a short circuit in the battery electrode plate and result in self discharge of the battery. Use a plate brush to clean the excess impurities on the plate of the earphones for easy soldering, in order to prevent false soldering or false soldering. Select the ones with unevenness, severe powder peeling, and holes on the plates.

Required equipment introduction: brushing headphones, etc.

3. How to weigh the electrode plate

When weighing and grouping the plates, it is necessary to first weigh a portion of the plates and arrange them on the workbench in order of weight, compare and mark the weight. Then, for the plates that have not been weighed, weigh each plate on the weighing instrument, and place them together with the plates placed on the workbench according to the weight of the plates. This saves some trouble. The smaller the weight difference between each group of positive or negative plates, the better. The error between each group of 10-14AH should not exceed 1g, and the error between each group of 17-20AH should not exceed 2g.

Required equipment introduction: weighing instrument, assembly mold, workbench, etc.

Package partition

1. After weighing, the plates should be grouped according to the regulations. After grouping, the plates should be wrapped. The materials of the partitions are generally microporous rubber and fiberglass. When packaging, attention should be paid to the cleanliness of the partitions. The plates should be placed in the middle of the partitions. If the positions of the plates are aligned, they should be placed in the plate box.

2. Double pack positive plates, use very thin partition plates together to only hold the positive plate, do not pack the negative plate, this can avoid short circuits caused by defects in single partition plates. Single piece packaging board, only the positive electrode board is packaged with a partition board, and the negative electrode board can be placed inside the packaging box, which is convenient and simple.

Required equipment introduction: packaging board box, etc.

Selection of lead parts

1. Lead components include lead electrodes and poles, which are cast using specialized molds. Generally around 450 ℃, if the temperature is too high, lead oxidation will be severe, and lead parts will crack due to severe shrinkage. It is not allowed to use iron tools to strike the mold. The lead parts made should be as free of sharp edges as possible, and if there are any, they should be trimmed.

Required equipment introduction: welding pliers, welding molds, oxygen welding tools, lead furnaces, etc.

Battery pack welding

1. Cluster welding, which involves soldering the positive and negative electrodes together with lead to form a cluster, and using oxygen acetylene as a tool to connect the pole and busbar together.

2. Place the packaged electrode plate inside the cluster box, then insert the electrode plate inside the cluster box into the comb plate. Insert the negative electrode first and then the positive electrode, so that the electrode ear is fully inserted into the comb plate. If there are any inadequacies, manually organize them and then place the bars, bridge pillars, and pole pillars between the positive and negative pole ears.

3. Turn on the acetylene and oxygen of the welding gun and ignite it, adjusting it to the appropriate size. Move the welding gun and electrode to the position of the pole ear, then melt the lead bar and pole ear. After the busbar is basically welded, weld the pole post and busbar together. If there are impurities such as lead ash during welding, false welding and false welding will be identified. The welding of the pole and busbar is a key process in the production process, and it is necessary to ensure that the welding is firm and free from false welding and false welding. At this point, impurities need to be removed while welding, and finally the busbar needs to be filled.

Required equipment introduction: busbar mold, welding gun, cluster box, etc. After welding the busbar, check for any defects before entering the slot installation process. Generally, the cluster with terminals should be installed first, and then other clusters should be installed. The positive and negative poles should be arranged in series with+-,+-,+-,+-, and+-, and do not install the wrong polarity.

When installing the slot on the electrode plate, it is necessary to install it to the bottom, and then check if the bridge column is normal. If there is any displacement, handle it manually. After trial installation, check if the upper cover can cover the basic cluster lower slot.

5. How to check the pole group? First, let's use a multimeter to measure whether the battery has a short circuit. If the voltage measured is zero or close to zero, it indicates a short circuit in the battery. Check the cluster and find the location of the short circuit for repair. Check if the positive and negative terminals of the multimeter are connected properly without a short circuit, and if there is no negative voltage displayed. If there is, prove that the polarity is reversed, and then reinstall it into the battery compartment.

6. After the detection of the electrode plate, there was no fault and it entered the bridge welding process. The welding of the electrode group is a crucial step. Use bridge welding to clamp the column, and use oxygen welding to weld the bridge column. During welding, ensure that the flame does not burn onto the battery casing, and ensure that there is no false welding, false welding, pole detachment from the cluster, and the cover can be closed smoothly. Seal the battery cover with a 2:1 ratio of epoxy resin adhesive and curing agent. The prepared glue should be used in a timely manner to avoid prolonged solidification. The solidification of the colloid is closely related to temperature, and the higher the temperature, the faster it solidifies. Therefore, it is important to use it as soon as possible. Another thing is to cover the heating equipment.

7. After the battery cover is completed, pole welding should be carried out to check whether the led out pole is in the middle position of the lead out hole. If it is not, it should be corrected. Insert the pole mold onto the outgoing pole and melt the pole with oxygen welding. There is another type of welding, which involves placing the terminal on the outgoing pole, placing it in the correct position, melting the solder wire with a soldering iron, and soldering the terminal and pole together. Pay attention to false welding and false welding during welding.

Required equipment introduction: pole group mold, multimeter, oxygen welding gun, glue gun, soldering iron, bridge welding pliers, airtightness testing machine, etc.

Electrolyte configuration

The electrolyte of lead-acid batteries is prepared with pure water and concentrated sulfuric acid. The density of electrolyte for automotive starter batteries is

1.280 ± 0.005g/cm3 (at 25 ℃)

② The container for preparing electrolyte must be acid and temperature resistant glazed ceramic, glass cylinder, plastic tank or lead lined wooden tank. When preparing, the staff must wear protective equipment;

Wash the utensils thoroughly before preparation and rinse with pure water;

When preparing the electrolyte, the required pure water should be first placed in a container, and then concentrated sulfuric acid should be slowly injected into the pure water while stirring continuously. It is strictly prohibited to inject water into sulfuric acid to avoid splashing and burning

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

D25: 25 ℃ electrolyte concentration dt: electrolyte concentration at temperature t

0.0007: Temperature coefficient t: measured electrolyte concentration

The main components of the electrolyte are distilled water and sulfuric acid. When preparing, the container must be acid resistant and clean.

2. Staff should have safety awareness and wear acid resistant gloves and clothing while working. If sulfuric acid splashes onto the skin during operation, it should be washed repeatedly with clean water in a timely manner. When configuring, first pour distilled water into a clean container, then slowly introduce concentrated sulfuric acid and stir with acid resistant tools. If the temperature is too high, stop adding acid to prevent the acidity from splashing out. Mix it to 1.1:28 at a temperature of 25 ℃. It is strictly prohibited to pour water into acid during configuration.

3. The amount of acid added can only be calculated based on the capacity of the battery and the capacity of the battery casing, the acid density, and the matching loss during charging and discharging, as acid is no longer pumped out after charging and discharging.

Required equipment introduction: distilled water dispenser, glass cylinder, straw, optical detector, density meter, etc.

Inject electrolyte

Unscrew the exhaust plug and make sure to penetrate the ventilation hole on the plug. There is a sealing gasket and paper under the plug, which needs to be removed after acid injection;

The electrolyte temperature must be cooled to below 30 ℃ and filled into the battery;

Inject the prepared electrolyte into each cell, and the liquid level of the plastic shell battery should be level with the mark "max" on the outer shell. The liquid level of the rubber tank battery should be 10-15mm higher than the partition;

Tighten the exhaust plug to prevent acid leakage

Required equipment introduction: coding machine, heat sealing machine, acid filling machine, acid pumping machine, etc.

Production equipment classification editing

According to the degree of automation of battery production equipment, it can be divided into pure manual production equipment, semi-automatic production equipment, and fully automatic production equipment

Handmade

The level of automation is the lowest, and each process requires a large amount of manual labor to complete. The daily output is the lowest, and product quality cannot be guaranteed. It is a low-end product of battery production equipment. Mainly present in small-scale battery processing points in rural areas.

Semi automation

The degree of automation has been greatly improved, and important processes in battery production are automatically completed by machines. The precision and daily output of batteries have been improved, making them mid-range products in battery production equipment. Suitable for medium-sized battery manufacturers in urban areas.

Fully automatic

Intelligent production equipment, all processes in battery production are completed by machines, freeing simple labor workers. It is the battery production equipment with the highest daily output and the best precision. 6. The production equipment used by large battery manufacturers.

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