Lithium battery battery production? Why lithium is best for making chemical batteries

Lithium-ion batteries are the development of lithium batteries. Before we talk about lithium-ion batteries, let's talk about lithium batteries. For example, the coin cell battery used in a camera is a lithium-ion battery.

The negative electrode of lithium batteries is manganese dioxide or thionyl chloride, and the negative electrode is lithium. After the battery assembly is completed, the battery has voltage and does not need to be recharged. This kind of battery can be charged, but the cycle performance is not good, in the charge and discharge cycle, it is easy to form lithium dendrites, resulting in a short circuit inside the battery, so it is generally forbidden to charge.

Later, the Japanese company Sony invented a carbon anode, with a lithium compound as the positive electrode, in the process of charging and discharging, there is no metal lithium, only lithium ions, which is a lithium-ion battery. When the battery is charged, lithium ions are formed on the positive electrode of the battery, and the resulting lithium ions are transported to the negative electrode through the electrolyte. As a negative carbon layer structure, it has a large number of micropores, and when it reaches the lithium-ion anode embedded in the micropores of the carbon layer, the more lithium ions are embedded, the greater the charging capacity.

Similarly, when the battery is discharged (which we use), the lithium ions embedded in the carbon layer of the negative electrode are released and moved back to the positive electrode. The more lithium ions return to the positive electrode, the higher the discharge capacity. What we usually call battery capacity is the discharge capacity.

In the process of charging and discharging lithium ions, lithium ions are in a state of motion from the positive electrode to the negative electrode and then to the positive electrode. The lithium-ion battery is like a rocking chair with two battery poles at each end, and the lithium-ion runs back and forth like an athlete. That's why lithium-ion batteries are called rocking chair batteries.

Shenzhen Bo Group Technology Co., Ltd., a senior lithium battery manufacturer.

Specializing in customized research and development of various lithium batteries, lithium battery packs, lithium batteries for electric vehicles, lithium batteries for electric bicycles.

Specializing in the production of customized various industrial lithium batteries, welcome to understand.

Platinum group lithium batteries.

Lithium is most suitable for making chemical batteries because it has the most reactive chemical properties, is prone to chemical reactions to form currents, and has a low density and light weight. Lithium is used as a battery, based on the fact that among all the current elements of the earth, the reserves of relatively optimal beryllium that we can find are too small, and it is a rare metal among rare metals.

Whether it is energy density, safety, charging speed, cost, process maturity and other aspects, there are stronger than lithium batteries, but from all angles, lithium batteries are still the best choice at present.

How it works

Basic principles of lithium batteriesLithium metal batteries are generally batteries that use manganese dioxide as the cathode material, lithium metal or its alloy metal as the anode material, and non-aqueous electrolyte solution.

Lithium-ion batteries are generally batteries that use lithium alloy metal oxide as the cathode material, graphite as the anode material, and non-aqueous electrolyte.

The battery is made as follows:

Ingredients: A bottle with a stopper, you can choose a bottle with a wooden stopper, a copper bar, a zinc flake, a bottle of dilute acid or electrolyte.

How to make your own battery:

1. Drill two holes in the stopper of the bottle, and insert one hole into the copper strip, as long as the copper strip is exposed to the cork for a short period of convenience to connect. Another hole can be inserted into the zinc sheet, or the zinc name can be put into the bottle, but it should be easy to connect with the wire.

2. Introduce the dilute flow acid or the electrolyte of the battery into the bottle and close the cork. The level of dilute liquid acid should be soaked in most of the copper bar and zinc sheet at the same time.

3. The two wires connecting the copper strip and the zinc sheet are used as the two poles of the battery, and the electrical appliances will generate current. It is also possible to connect two wires to a voltmeter or multimeter for measurement.

Commonly used automotive batteries are mainly divided into three categories: ordinary batteries, dry-charge batteries and maintenance-free batteries.

Ordinary battery: The plates of ordinary batteries are composed of lead and lead oxide, and the electrolyte is an aqueous solution of sulfuric acid. Its main advantages are stable voltage and low price; The disadvantages are low specific energy, short service life and frequent routine maintenance.

Dry-charged battery:

Its full name is dry charged lead-acid battery, its main feature is that the negative plate has a high power storage capacity, in a completely dry state, can save the power obtained within two years, when using, only need to add electrolyte, wait for 20-30 minutes can be used.

Maintenance-free battery:

Due to the advantages of its own structure, the consumption of electrolyte is very small, and there is basically no need to replenish distilled water during the service life. It also has the characteristics of shock resistance, high temperature resistance, small size, and small self-discharge. The service life is generally twice that of ordinary batteries.

There are also two types of maintenance-free batteries on the market: the first one does not require maintenance after adding electrolyte at one time at the time of purchase; The other is that the battery itself has been added with electrolyte and sealed at the factory, and the user cannot add refill liquid at all.

The homemade lithium battery tutorial is as follows:

Step 1: Ingredients. High vacuum automatic stirring of materials for 10 hours, the materials required for lithium batteries are evenly dispersed, and the consistency and comprehensive performance of the battery are improved.

Why? Because ingredients are the core area of lithium battery production, poor ingredients directly affect the performance of lithium batteries.

Why? Because coating is the foundation of lithium battery destruction, coating determines the consistency of the battery. After the positive and negative electrode pieces are coated, the positive and negative materials are relatively loose, and a certain pressure should be given to the electrode pieces to compact the positive and negative electrode materials to a certain range.

The fourth step is to bend the state: slitting. Depending on the type of battery, the positive and negative electrode pieces need to be cut into the required width. Such as 18650 lithium battery.

The width of the pole piece is within 56-58mm.

Step 5: Production.

and winding. A fully automatic tablet making machine is used to weld the positive and negative tabs to the positive and negative tabs. And the automatic winding machine is used to wind the positive and negative electrode pieces and the diaphragm together into a cylindrical shape.

Step 6: Bottom roll groove and vacuum drying. The core is put into the steel shell, the negative tab is automatically welded, and the groove is automatically rolled. In addition, a small amount of water is dried after high vacuum and high temperature baking, so that the performance of lithium batteries can be guaranteed.

As follows:

Tools Raw materials: battery buckle, 18650 battery cell, electric welding machine, barley paper, soldering iron, insulating glue.

Method Steps:

1. First of all, it is necessary to determine the size and capacity of the lithium battery, "series supercharging, parallel capacity increase" to a single cell as an example, to make a 48V10Ah battery, it is 4 and 12 strings.

2. Secondly, choose the stabilized version, different series-parallel connection methods need different stabilized versions, and you need to choose carefully.

3. To determine the internal resistance of the battery, to ensure the life of the battery pack, the internal resistance of the battery cell also has certain requirements, and the difference between the internal resistance of all batteries is +-1m.

4. Put the battery on the buckle, and weld the battery, use a spot welding machine to weld the battery in series and parallel, and the operator is forbidden to carry conductive objects.

5. Solder the stabilizer plate, and weld each parallel point with the stabilizer plate.

6. Insulation operation, wrapping with insulating tape.

7. Add a shock-absorbing sponge, and finally wrap it with barley paper, and the pins need to be exposed.

8. Finally, you can add heat shrinkable film to the battery according to the option, and blow it with a heat gun to shrink it.

Summary. 1.Determine the series-parallel connection.

2.Determine the regulated version.

3.Test the internal resistance of the cell.

4.Perform series-parallel connections.

5.Connect to the regulator plate.

6.Insulated wrapping.

7.Shockproof cotton and barley paper.

8.Heat shrink film.

Precautions: Do not have more points when welding. The stabilized version cannot be soldered.

Lithium battery is a common secondary battery, which is widely used in mobile electronic products, automotive batteries and other fields due to its high energy density, long life and low self-discharge rate. Here are the detailed steps for lithium battery making:

1.Prepare materials and instruments. It is necessary to prepare cathode materials, anode materials, electrolytes, separators, battery shells, battery covers, battery protection plates, battery testing instruments, etc.

2.Preparation of cathode materials. The cathode material is usually lithium cobalt oxide (LiCoO2) or lithium iron phosphoric acid (LiFePO4), which can be prepared by mixing, pressing, drying and other processes.

3.Preparation of anode materials. The anode material is usually graphite or silicon, etc., and the preparation method is similar to that of the cathode material.

4.Preparation of electrolytes. Electrolytes are usually composed of organic solvents, lithium salts, additives, etc., and need to be mixed in a certain proportion.

5.Assemble the battery. The cathode material, anode material, and separator are assembled in the battery case according to a certain structure, and then the electrolyte is added.

6.Encapsulated battery. The battery cover is sealed on the battery housing, and then the battery protection plate and the battery test instrument are connected by welding or pressing.

7.Charging and discharging. The made lithium battery will be charged and discharged to confirm the performance indicators of the battery.

It should be noted that in the process of making lithium batteries, it is necessary to strictly control the operating parameters and safety measures of each link to ensure the quality and safety of the battery.

<> is to mix the electrode active materials, binders, solvents, etc., and thoroughly stir and disperse them to form a slurry.

The slurry prepared in the first step is evenly applied to the current collector (aluminum foil, copper foil, etc.) at a specified thickness and the solvent is dried.

The made pole piece is punched and cut into the specified size and shape.

The positive and negative electrode pieces and the diaphragm are assembled together, and after the glue is completed, the pole core is formed.

The pole core produced in the previous step is loaded into the aluminum-plastic film that has been punched into the pit, and the top seal, side seal, etc. are completed (and a mouth is left for liquid injection) to form a pouch battery without liquid injection.

A specified amount of electrolyte is injected into the pouch cell. Of course, the battery cells need to be baked and injected in a low humidity environment, and it is not good to have too much moisture.

In a vacuum environment, the gas inside the cell is extracted and sealed.

Lithium battery.

Lithium battery production steps:

1.The battery raw material pack is fed into the glove box from the infeed compartment.

2.The battery raw material pack is automatically scanned and weighed, and the weighed battery raw material pack is automatically placed in the material conveying device.

3.The conveyor automatically enters the liquid injection cylinder for liquid injection.

4.After liquid injection, the battery enters the static cylinder and is stationed.

5.After standing, the battery enters the sealing cylinder for evacuation and sealing.

6.The sealed battery will be automatically weighed twice, and the unqualified product will enter the ** transition cabin on the left for processing.

7.Qualified batteries will be automatically sent to the discharge cabin.

"Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the anode material and uses a non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Lithium batteries can be broadly divided into two categories:

Lithium metal batteries and lithium-ion batteries. Lithium-ion batteries do not contain lithium in a metallic state and are rechargeable. The Tesla electric car we are familiar with is a battery board composed of 18650 lithium-ion batteries through series and parallel.