July 09, 2021
The important process standards of lithium-ion battery PACK
Lithium-ion battery PACK is divided into four parts: processing, assembly, testing, and packaging. The battery PACK must be screened before. Different customers have completely different requirements for the cells before the lithium-ion battery PACK. Many manufacturers have a lot of battery PACK factories. Strict requirements, let’s take a look at the important process standards of lithium-ion battery PACK today. In the lithium-ion battery pack industry, people call batteries that are not assembled and can be directly used individually as batteries, and the finished battery pack connected to the PCM board with charging and discharging functions is called lithium-ion battery PACK. The PACK process of lithium-ion batteries refers to the assembly of battery cells, protective plates, battery wires, battery nickel sheets, battery accessories, battery boxes, battery membranes, etc. into finished batteries by welding. The battery pack PACK requires the battery to have a high degree of consistency (capacity, internal resistance, voltage, discharge curve, life). The vast majority of the existing lithium-ion battery PACK technology is to link the cells together by welding, which also complicates the maintenance of battery problems. In addition, the batteries may face many thorny problems when they are batched. Reliability of batch products, excellent battery PACK technology, and finished product testing are essential. 1. Full inspection standard of battery cell appearance The appearance standard of cylindrical batteries: no short circuit, oxidation, rust, leakage of veneer pad or skewed surface pad, film breakage, film wrinkle, etc. The appearance standard of the square battery cell: no electrolyte, burr or other contaminants on the surface, no leakage, bulging, deformation, short circuit, etc., no skew or warping of the surface pad, no oxidation, dirt, desoldering, etc. on the composite nickel belt. The appearance standard of polymer batteries: no electrolyte or other pollution on the surface, no leakage, swelling, deformation, etc., no fracture of the tab, no damage to the corners, no delamination, etc. 2. Standard for battery cell veneer pad The surface pad is required to be firmly pasted, not skewed, warped, not beyond the edge of the end face of the battery, and not cover the negative rivet---aluminum shell battery positive cap (for multiple parallel strings, use formed barley paper or red steel paper to paste)-- -For steel shell cylindrical batteries; covered with textured paper or high-temperature adhesive paper---polymer batteries. 3. Cell voltage and internal resistance test Test equipment: multimeter, multi-function test stand, battery internal resistance tester, general battery test stand, scanner. Test connection method: The positive and negative terminals of the battery are contacted with the positive and negative thimble of the test frame respectively. 4. Battery cell combination standard Cylindrical battery: Adhesive bonding process, using g...
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