First, battery cell testing equipment
The first step is battery cell detection, which needs to detect whether the battery cell capacity, rate and cycle times meet the use requirements. Then the required device is a capacity detector to detect these. Battery capacity detector is not very expensive, there are different channels.
Second, the battery cell pairing equipment
Through the last step, the battery is preliminarily screened. Then what is needed next is battery cell pairing to keep the consistency of battery internal resistance and voltage, and a lithium battery sorter is also needed.
Lithium battery sorter is a sorting equipment used to test the internal resistance, voltage and other parameters of cylindrical batteries. The sorting of the equipment is accurately controlled by servo motor, and the testing mechanism adopts five-station scanning test mode, which can test multiple batteries at the same time, greatly improving the test data and the stability of the test data. The operating system adopts the windows PC operating system independently developed by our company, which can query the historical detection data and facilitate traceability. According to different needs, we have different types of battery sorters to choose from, and we can also tailor the solution according to your own specific requirements. For example: 6-channel automatic battery sorter, 10-channel automatic battery sorter, 20-channel automatic battery sorter, 18650/2 1700 universal battery sorter and so on.
Three, lithium battery stick highland barley paper machine
In this step, it is necessary to use the battery to automatically paste the highland barley paper machine. Some bosses may ask, why put highland barley paper on lithium batteries? In fact, highland barley paper is very important in electronic products. Stick highland barley paper on the positive electrode of the battery to prevent the positive electrode from colliding with the positive electrode, causing short circuit or dust entering the gap. Barley paper has good insulation, water resistance and wear resistance.
Four, lithium battery spot welding machine
Spot welding machine for lithium battery is to assemble a single battery by spot welding nickel plate.
Five, the finished product comprehensive tester
The finished battery needs production inspection, so it is necessary to use the finished product comprehensive tester.
Six, finished product aging test
This requires the use of battery aging cabinets and battery aging instruments.
Lithium battery assembly is the service of assembling and selling finished parts. In general, a single lithium battery assembly does not need to apply for a safety license. The market of non-standard lithium battery products should provide services related to environmental protection, hygiene and fire safety.
When the battery is overcharged to a voltage higher than 4.2V, it will start to produce side effects. The greater the overcharge pressure, the higher the risk. When the battery cell voltage is higher than 4.2V, the number of lithium atoms left in the cathode material is less than half. At this time, the battery often collapses, resulting in a permanent decrease in battery capacity.
If charging is continued, the subsequent lithium metal will accumulate on the surface of the negative electrode material, because the storage battery of the negative electrode is already full of lithium atoms. These lithium atoms will grow dendrites from the negative electrode surface to lithium ions.
These lithium metal crystals will pass through the separator paper, shorting the anode and cathode. Sometimes the battery will explode before the short circuit happens. This is because in the process of overcharge, electrolyte and other substances will crack to produce gas, which will lead to the expansion and rupture of the battery case or pressure valve, allowing oxygen to enter and react with lithium atoms accumulated on the surface of the negative electrode, and then explode.
Legal basis: Article 225 of the Criminal Law of People's Republic of China (PRC), in violation of state regulations, commits one of the following illegal business operations, disrupting market order, and if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention, and shall also, or shall only, be fined not less than one time but not more than five times the illegal income; If the circumstances are especially serious, he shall be sentenced to fixed-term imprisonment of not less than five years, and shall also be fined not less than one time but not more than five times for illegal gains or confiscation of property:
(a) operating a franchise or monopoly commodity or other commodities whose operation is restricted by laws and administrative regulations without permission;
(2) buying and selling import and export licenses, import and export certificates of origin and other business licenses or approval documents stipulated by laws and administrative regulations;
(three) without the approval of the relevant competent departments of the state, illegally engaged in securities, futures, insurance business, or illegally engaged in fund payment and settlement business;