1, lead-acid battery process overview Lead-acid battery is mainly composed of battery tank, battery cover, positive and negative plate, dilute sulfuric acid electrolyte, partition and accessories.

2, the process manufacturing is described as follows

Lead powder manufacturing: The 1# electrolytic lead with special equipment lead powder machine through oxidation screening to make meet the requirements of lead powder.
Grid casting: the lead antimony alloy, lead calcium alloy or other alloy lead is usually cast into different types of various plate grids that meet the requirements by gravity casting.
Plate manufacturing: Use lead powder and dilute sulfuric acid and additives mixed on the grid surface and then dry curing is the raw plate.
Plate formation: positive and negative plates produce lead oxide through REDOX reaction with dilute sulfuric acid under the action of direct current, and then through cleaning and drying, it can be used for positive and negative plates used in battery assembly.
Assembly of batteries: different models of different plates are assembled into various types of batteries according to different needs.

3, grid casting introduction Grid is the carrier of active substances, but also conductive fluid collection. The common open battery grid is generally cast with lead-antimony alloy, the maintenance-free battery grid is generally cast with low-antimony alloy or lead-calcium alloy, and the sealed valve-controlled lead-acid battery grid is generally cast with lead-calcium alloy.

The first step: According to the battery type to determine the alloy lead model into the lead furnace heating melting, to meet the technical requirements of the lead liquid cast into the metal mold, after cooling the mold after the dressing number.
The second step: the trimmed grid can be transferred to the next process after a certain aging period. The main control parameters of grid are: grid quality;
Grid thickness; The integrity of the grid; Grid geometry;

4, lead powder manufacturing introduction to the Shimadzu method and Patton method, the result is that the 1# electrolytic lead is processed into lead powder that meets the requirements of the battery production process.

The Shimadzu process for producing lead powder is described as follows:
The first step: the test qualified electrolytic lead through casting or other methods into a certain size of the lead shot or lead segment;
The second step: put the lead ball or lead section into the lead powder machine, the lead ball or lead section is oxidized to produce lead oxide;
Step 3: Put the lead powder into the designated container or powder storage bin, after 2-3 days of aging, the test can be used after qualified.
Main control parameters of lead powder: oxidation degree; Apparent density; Water absorption; Granularity, etc.;

5, plate manufacturing introduction Plate is the core part of the battery, its quality directly affects the battery performance indicators. The production process of coated plate is described as follows:

The first step: test qualified lead powder, dilute sulfuric acid, additives with special equipment and make lead paste;
Step 2: Fill the lead green on the grid with a smear machine or by hand;
The third step: the coated plate is cured and dried, that is, the raw plate is obtained.
Main control parameters: lead breeding formula; Apparent density; Acid content; Feeding quantity; Thickness; Free lead content; Moisture content, etc.

6, valve-controlled sealed lead-acid battery assembly process is described as follows:

The first step: put the qualified plate into the welding tool according to the process requirements;
Step 2: Put the cast-welded or hand-welded electrode group into a clean battery tank;
The third step is to pass through the wall welding and heat sealing of the car battery. If ABS battery slots are used for valve-controlled sealed lead-acid batteries, they need to be bonded with special adhesives.
Main control parameters of battery assembly: bus welding quality and material; Sealing performance, positive and negative polarity, etc.

7, valve-controlled sealed lead-acid battery formation description is as follows:

The first step: the test qualified electrode plate according to the process requirements into the battery tank seal; The second step: a certain concentration of dilute sulfuric acid is injected into the battery according to the specified amount; The third step: After being placed, direct current is passed according to the size of the specification, and discharge inspection is generally required after formation and storage.
The main control parameters of battery formation are: acid filling amount, acid density, acid temperature, charging amount and charging time.