The core problem solved by the assembly of lithium battery packs is the consistency of lithium batteries, that is, the voltage difference, capacity difference, and internal resistance difference of each battery cell are as small as possible. The 12V lithium battery pack assembled in this way The best effect can be exerted in terms of efficiency and service life. The following is some knowledge sharing about how to assemble 12V lithium battery.
12V lithium battery
1. Assembly method of large capacity 12V lithium battery
The design principle of large-capacity 12V lithium battery is designed by assembling and processing multiple 3.7V lithium battery cells. When making large-capacity 12V lithium battery assembly, it must be assembled in parallel. Only the large-capacity 3.7V lithium-ion battery pack must be assembled in parallel. The battery capacity is the largest, and then the larger the number of batteries connected in series and parallel, the larger the battery capacity.
2. Cylindrical 12V lithium battery
That is to say, multiple cylindrical batteries are designed in series and parallel to form a corresponding 12V lithium battery pack, but one thing must be to meet the customer's battery size, voltage capacity, and overcurrent requirements to qualify as a cylindrical 12V lithium battery assembly.
Cylindrical 12V lithium battery assembly. For example, the 12V solar insecticidal lamp has a lithium-ion battery capacity of 2.6Ah and a nominal voltage of 11.1V. Most of the industry refers to this 3-string lithium-ion battery as a 12V lithium-ion battery pack. It can be customized, such as 12V10Ah solar insecticidal lamp lithium ion battery, 12V8Ah solar insecticidal lamp lithium ion battery, 12V15Ah lithium ion battery customization technology method, the solar insecticidal lamp battery in this article uses 3 3.7VLC18650 lithium batteries for PACK Assembled, the single battery capacity reaches 2600mAh. This insecticidal lamp battery is sometimes called 11.1V lithium ion battery pack, and the finished small solar insecticidal lamp battery pack.
3. 12V lithium iron phosphate battery assembly
The nominal voltage of this customized lithium-ion battery pack made of lithium iron phosphate material is generally called 12.8V, and some battery technicians call it 12.8V lithium-ion battery pack. Of course, the technical requirements for custom-made lithium iron phosphate 12V lithium-ion batteries are more stringent. It adopts a 4-string battery structure, which can customize 26650 lithium-ion batteries or 18650 lithium-ion battery packs through 4-series technology for PACK processing and assembly, and then make customized products of lithium iron phosphate 12V lithium-ion batteries.
Fourth, 12V polymer lithium battery assembly
The assembly of the 12V polymer lithium battery is even simpler. The assembly principle of the 12V polymer lithium battery is to connect the polymer lithium batteries in three strings, but the polymer 12V lithium ion battery must be customized with a battery protection board, and then through the laser Welding technology, battery soldering technology, and PACK lithium-ion battery finished product processing technology are all mixed together, but in terms of cylinders, polymer 12V lithium-ion battery customization using this method is relatively rare.
The 12V lithium battery assembly process is customized according to actual product requirements. The battery customization process is important to evaluate and analyze the actual situation, and then perform cost analysis according to the company process and profit analysis for comprehensive quotation. Under normal circumstances, the battery customization process is divided into two The parts are as follows:
1. To understand the real needs of the product, you only need to supply the lithium-ion battery size, electrical performance requirements, output requirements, and functional requirements to customize the battery.
2. If you don't understand the real requirements of the product, just tell us the functional requirements, working time, product power, appearance and shape.