How to make a battery stock?

First add steamed water to temperature-resistant and non-metallic container. The ratio of water and 1.83 specific gravity is 3.3:1. Stir the water first, then slowly pour acid into water. Never pour the water into acid this will cause explode! When temperature drops to 20 degrees, adjust proportion to 1.28 plus or minus 0.005. (Or 1.255 plus or minus 0.005). When temperature of this adjusted electrolyte a lower than 35 ° C, fill it into battery. Except for lead, you should not contact other metals from start to end!

1. Battery water (replenishment solution) is generally only used in lead-acid batteries. The replenishing solution is a dilute sulfuric acid solution with a specific gravity of 1.05. Other batteries do not have this concept. There are also two types of battery water, one is supplemental acid, usually dilute sulfuric acid, but this type of battery water is basically not used because of inconvenience. There is also a type of pure water, or distilled water, of course, there may be some necessary electrolytes, such battery water is used for rehydration. A good lead-acid battery is basically maintenance-free and can be refilled. Electric vehicles generally use maintenance-free lead-acid batteries.

2. The main component is distilled water, and some of the replenishing solution is 1 to 3% sulfuric acid solution. The replenisher is very cheap, a few dollars a bottle, the cost is less than 1 yuan. Some of the additives known as battery enhancers are pink and the composition is cobalt ion (cobalt sulfate). Cobalt ions can enhance battery capacity, and some enhancers also add phosphoric acid, which also locally increases battery capacity. But these ions can damage the battery life. These enhancers are more expensive and are different from supplements.

3. If you want to learn manufacturing technology in this area, you can use Baidu Search. There are many such companies. It's easy to find.

Electrolyte is a broad term that is used in different industries to represent a large difference in content. There are electrolytes (also called electrolytes) in the living body, electrolytes used in the battery industry, and electrolytes in industries such as electrolytic capacitors and supercapacitors.

The electrolytes used in different industries vary greatly in composition or even completely different.

For example, the electrolyte of the human body is mainly composed of water, sodium chloride, pH buffer, etc. The electrolyte of the aluminum electrolyte capacitor contains the main solvent such as GBL, the supercapacitor electrolyte contains the main solvent of propylene carbonate or acetonitrile, and the lithium manganese primary battery is electrolyzed. The liquid contains main solvents such as propylene carbonate and ethylene glycol dimethyl ether, and the lithium ion battery electrolyte contains main solvents such as ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate and diethyl carbonate. Their respective conductive salts It is also completely different, such as sodium chloride in human body, tetraethylammonium tetrafluoroborate in supercapacitor electrolyte, lithium perchlorate or lithium trifluoromethanesulfonate in lithium manganese primary battery, and lithium ion battery in lithium ion battery. Lithium hexafluorophosphate.

The electrolyte is a medium used for chemical batteries, electrolytic capacitors, etc. (having a certain degree of corrosiveness) to provide ions for their normal operation. And to ensure that the chemical reactions taking place at work are reversible.

There are many advantages to using an electrolyte as a cathode. The first is that the contact area between the liquid and the medium is large, which is helpful for increasing the capacitance. The second is electrolytic capacitors made of electrolytes, which can withstand temperatures up to 260 degrees, so that wave soldering (wave soldering is an important process for SMT chip mounting) is also possible, and the pressure resistance is also strong.

In addition, the electrolytic capacitor using the electrolyte as the cathode can self-heal if the breakdown current does not continue after the medium is broken down. But the electrolyte also has its shortcomings. Firstly, it is easy to volatilize and leak under high temperature environment, which has great influence on life and stability. Under high temperature and high pressure, the electrolyte may be vaporized instantaneously, and the volume increases to cause explosion (which is what we often say); The ion conduction method used in the electrolyte has a low conductivity of only 0.01 S (conductivity, reciprocal of ohms) / CM, which results in a particularly high ESR value (equivalent series resistance) of the capacitor.

The stock solution is used, the lead plate is used as the cathode (negative electrode), the workpiece is made as the anode (positive electrode), 60-65 degrees, the current density is 10-25 amps/square decimeter, the voltage is 8-10 volts, and the time is 5-8 minutes.

1. The polishing liquid will produce foam when it is electrolytically polished at the initial stage of use, so the distance between the liquid level of the polishing liquid and the top of the polishing tank should not be ≤ 15 cm.

2. The stainless-steel workpiece should remove the moisture remaining on the surface of the workpiece as much as possible before entering the polishing tank. Due to the excessive moisture in the workpiece, the polished surface may be seriously pitting, and the partial etching may cause the workpiece to be scrapped.

3. In the electropolishing process, the iron and chromium elements contained in the stainless-steel workpiece as the anode are continuously converted into metal ions dissolved in the polishing liquid without being deposited on the surface of the cathode. As the polishing process progresses, the concentration of metal ions increases continuously. When a certain value is reached, these metal ions are continuously precipitated from the polishing liquid in the form of phosphate and sulfate, and settled at the bottom of the polishing bath. To this end, the slurry must be periodically filtered to remove these solid deposits.

4. During the operation of the polishing tank, in addition to the continuous consumption of phosphoric acid and sulfuric acid, the external moisture is lost due to evaporation and electrolysis. In addition, the high-viscosity polishing liquid is continuously lost by the entrainment of the workpiece, and the liquid level of the polishing liquid is continuously decreased, and it is necessary to frequently add to the polishing tank. Fresh polishing liquid and water

5. Discharge after neutralization meets today's environmental requirements.

6, this product is corrosive, do not enter the eyes, mouth, do not touch the skin. If it is accidentally touched, rinse immediately with clean water. In severe cases, treat it with strong acid burns;

7, sealed in a cool place to save, long-term effective.

The electrolyte is prepared from a special proportion of sulfuric acid and distilled water, and the density is generally 1.24-1.30 grams per cubic centimeter. The specific gravity is 12.75-12.85G/CM3 sulfuric acid plus pure water. If the water is consumed during the use of the battery, add pure water to charge.

For example, the electrolyte of a lead-acid battery is prepared by a certain ratio of 80% sulfuric acid and distilled water, and the density is generally 1.24-1.30 g/cm. The specific gravity is 12.75-12.85g/cm3. Some lead-acid batteries (such as motorcycle lead-acid batteries) need to be filled by themselves. Therefore, be careful when filling, do not enter the eyes, the entrance!

If the water is consumed during battery use, add pure water to charge.

The electrolyte is not an abbreviation of the electrolyte solution, but is broader than its cover, including an aqueous solution of the electrolyte and an electrolyte in a molten state.

The electrolyte can be 10 to 15 mm higher than the plate; if there are two red wires, the electrolyte must not exceed the upper red line. If the electrolyte is too full, it will overflow from the small hole in the battery cover. The electrolyte is electrically conductive, and once it flows between the positive and negative electrodes of the battery, a self-discharge of the circuit is formed. In this case, the electrolyte should be wiped off or rinsed with boiling water.

If something accidentally falls into the electrolyte, do not use metal objects to fish, use wooden sticks to remove impurities; if you use iron wire or copper wire to fish, metal molecules will enter the battery under the corrosion of sulfuric acid to form self-discharge. And damage the battery.

During the charging and discharging process of the battery, the water in the electrolyte will gradually decrease due to electrolysis and evaporation, resulting in a decrease in the electrolyte surface. If it is not replenished in time, it is possible to shorten the service life of the battery, and should be supplemented with distilled water in time, [1] should not be replaced with pure drinking water. Because pure water contains a variety of trace elements, it will have an adverse effect on the battery.

Vinyl carbonate

Molecular formula: C3H4O3

Transparent colorless liquid (>35 ° C), crystalline solid at room temperature. Boiling point: 248 ° C / 760 mmHg, 243-244 ° C / 740 mmHg; flash point: 160 ° C; density: 1.3218; refractive index: 1.4158 (50 ° C); melting point: 35-38 ° C; this product is polyacrylonitrile, polyvinyl chloride Good solvent. It can be used as a spinning solution on textiles; it can also be used directly as a solvent for removing acid gases and as an additive for concrete; it can be used as a pharmaceutical component and raw material in medicine; it can also be used as a plastic foaming agent and synthetic lubricating oil. Stabilizer; an excellent solvent for lithium battery electrolytes in the battery industry

Propylene carbonate

Molecular formula: C4H6O3

Colorless, odorless, or light-yellow transparent liquid, soluble in water and carbon tetrachloride, miscible with ether, acetone, benzene, etc. It is an excellent polar solvent. This product is mainly used in polymer processing, gas separation process and electrochemistry. It is used to absorb carbon dioxide from natural gas and petrochemical plants, and can also be used as a plasticizer, a spinning solvent, an olefin and an aromatic extractant.

Toxicological data: No animal poisoning was found in oral or dermal exposure in rats. Oral LD50=2,9000mg/kg.

It should store in a cool, ventilated, dry place, away from fire sources, store and transport in accordance with general low-toxic chemicals regulations.

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