Nickel Metal Hydride No. 5 battery

　　Nickel Metal Hydride No. 5 battery production process

　　Lithium battery production process flow:

　　The first step - preparation of electrode slurry

　　Mainly, the electrode active materials, binders, solvents, etc. are mixed together and thoroughly stirred and dispersed to form a slurry.

　　The second step - coating

　　Evenly apply the slurry prepared in the first step to the current collector (aluminum foil or copper foil, etc.) with a specified thickness, and dry the solvent.

　　Step 3 - Pole piece punching

　　Cut the pole piece made in the previous step into the specified size and shape.

　　Step 4 - Lamination

　　Assemble the positive and negative electrode sheets and separator together, and after completing the glue application, the electrode core is formed.

　　Step 5--Assemble the soft pack battery

　　Put the pole core produced in the previous step into the aluminum-plastic film that has been punched out, and complete top sealing, side sealing, etc. (leaving a hole for liquid injection) to form a soft-pack battery that has not been filled with liquid.

　　Step 6 - Injection

　　Inject the specified amount of electrolyte into the soft-packed battery cell. Of course, the battery core must be baked and filled with liquid in a low-humidity environment. Excessive moisture content is not good.

　　Step Seven--Battery Sealing

　　The gas inside the cell is extracted and sealed in a vacuum environment.

　　With the rapid development of electric vehicles and automobiles, the power sources on the vehicles have also developed rapidly. However, there are many problems in the production of batteries, which has caused the quality of battery products in the market to be very uneven, and the battery capacity and cycle life are very uneven. The failure to achieve the designed service life has a lot to do with the unique production process of the battery during production.

　　The structure of the battery consists of outer casing, upper cover, polar plates, separators, busbars, poles, bridge protection plates, terminals and other components.

　　The processes of each lithium battery manufacturer have some differences, but they remain the same. The main processes are: batching, coating, rolling, cutting, slitting, welding tabs, winding, packaging, baking, and liquid injection. , formation, molding, volumetric testing and other process steps.

　　The time of each step is different. Generally, the ingredients, baking, and transformation time are relatively long, which may take 10-48 hours. Other processes are faster, in 4-8 hours. It will take about 15 days in total.

　　With the rapid development of electric vehicles and automobiles, the power sources on the vehicles have also developed rapidly. However, there are many problems in the production of batteries, which has caused the quality of battery products in the market to be very uneven, and the battery capacity and cycle life are very uneven. The failure to achieve the designed service life has a lot to do with the unique production process of the battery during production. The structure of the battery consists of outer shell, upper cover, polar plates, separators, busbars, poles, bridge protection plates, terminals and other components.

　　1. First, weigh the plates inside each battery and assemble the plates. The capacity of each cluster must be equal, otherwise the group with a small capacity will be fully charged in advance due to its small capacity. Then the battery group with a large capacity has not yet been fully charged, the terminal voltage of the battery is low, and the total voltage has not reached the full end voltage. Charging, causing a group with a small capacity to become overcharged. If the battery is discharging, the group with a small capacity will lose its power in advance. The voltage of other battery terminals is higher, and the total voltage of the battery does not have the termination protection of electric boost. Voltage, discharge continues, causing the battery to over-discharge.

　　Overcharging and over-discharging of the battery as well as untimely charging will affect the service life of the battery. However, the battery capacity of the battery group with the small battery further decreases. The decrease in battery capacity further causes the group to overcharge and over-discharge. This cycle causes the battery capacity to be very low. Quickly reduce and become scrapped.

　　2. Handling of plates before weighing

　　Before weighing the plates, you must be clear about the excess front edges, burrs, and excess active materials during paste application. If they are not clean, they will cause a short circuit of the battery plates, that is, self-discharge of the battery. Use a plate brush earphone to clean the excess impurities on the plate to facilitate welding to prevent false welding or false welding. It is necessary to select those with uneven electrode plates, serious powder removal, and electrode plates with holes.

　　3. How to weigh the plates

　　When weighing and assembling the plates, first weigh out some of the plates and place them on the workbench in order according to their weights, compare and mark the weights, and then weigh the unweighted plates on the weighing instrument. The weight of the electrode plate is placed together with the plate placed on the workbench according to the weighed weight of the electrode plate, which saves some trouble. (The smaller the weight difference between each group of positive or negative plates, the better. The error between 10 and 14AH should not exceed 1 gram per group, and the error between 17 and 20AH should not exceed 2 grams per group.

　　Pack partition

　　1. The weighed plates are weighted and grouped according to regulations. After grouping, the plates are packed. The materials of the separators are generally microporous rubber and glass fiber. When packaging, pay attention to the cleaning of the separators and place the plates on the separators. In the middle of the plate, if the position of the plate is aligned, place it in the plate box.

　　Kedi Partition

　　Kedi Partition

　　2. Wrap the positive plate in two pieces. Use very thin separator pieces to hold only the positive plate and do not wrap the negative plate. This can avoid short circuits caused by defects in the single-piece separator. For single-piece packaging, use separators to pack only the positive plate and leave out the negative plate and place it in the packaging box, which is convenient and simple.

　　Lead parts selection and processing

　　1. The lead parts include lead welding rods and poles, which are cast with special molds. Generally around 450°C, if the temperature is too high, the lead will be seriously oxidized, and the lead parts will suffer from cracks due to severe shrinkage. It is not allowed to use iron tools to knock the mold. The lead parts should be made to have no burrs around them as much as possible. If there are any, they should be trimmed.

Read recommendations:

LR20

18650 Battery Pack Performance and Application Benefits.lithium ion battery cells 18650

Cycle Life of Lithium - Ion Batteries

3.2v 20ah lifepo4 battery

NiMH battery pack