Whether it is 18650, 21700 cylindrical lithium battery pack, or polymer soft pack lithium battery, lithium iron phosphate lithium battery pack, there are standard operating procedures and standards to ensure safe production, the lithium battery itself is the energy body, polygel a large number of lithium battery manufacturers must be strictly in accordance with the safety standards of the operating procedures. Only then can we ensure the safety of production, as well as the safety of the product. Now the lithium battery PACK manufacturers to explain the lithium battery assembly matters needing attention
A, lithium battery PACK need to pay attention to
1, lithium battery screening, the use of internal resistance meter, capacity testing equipment will be combined with the cell screening, according to the internal resistance and capacity parameters are similar to the use of groups.
2, soft pack lithium batteries need to pay attention to the protection of the outer packaging, away from sharp objects to avoid stabbing damage. Wear gloves and cut fingernails.
3, prohibit bending the top seal and side seal, take reliable insulation isolation measures to avoid short circuit of the negative pole and aluminum-plastic composite film docking.
4、Prohibit bending the pole handle, avoid contact between the pole handle and the aluminum-plastic composite film during the production process, and strictly isolate it with the collar film.
5、Use PC film or silicon film to space out the pole lugs, insulate them well and fix them with stripe adhesive.
6、Avoid mechanical impact, such as dropping, striking, bending the cells and trampling the battery.
7、Forbid to short-circuit the positive and negative terminals of lithium battery with metal objects.
8, according to the operational requirements, do a good job of waterproof sealing protection.
9, the battery pack needs to do a good job of shock buffer protection, to avoid the lithium battery due to vibration caused by NiMH welding off. Or other damage.
10, do a good job of battery and BMS heat dissipation, placing the occurrence of thermal aggregation effect.
11, the structure design needs to consider the battery corrosion prevention problems.
Second, the lithium battery PACK needs to pay attention to other matters
1, shell design.
(1) sufficient mechanical strength to avoid external mechanical damage to the battery cell.
(2) The interior must not have sharp edges.
(3) Space needs to be reserved, the inner wall of the shell must not be in direct contact with the core to avoid friction between the core and the shell resulting in a short circuit of the outer skin of the core.
2、Reasonable BMS setting and matching
3, welding to be secure
4, reliable positioning of the core, the core should be fastened firmly in the shell after assembly and will not be loosened at will, so that the entire lithium battery structure is in a solid state.
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