18650 rechargeable battery lithium 3.7v 3500mah
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18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah

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Influencing factors of lithium battery price

release time:2022-12-17 Hits:     Popular:AG11 battery


  Cabinet type energy storage battery 15KWH

  1. Selection of electric core

  First, the selection of cells with different material systems will affect the price of lithium batteries. According to the different cathode materials, lithium batteries can have cores made of lithium manganate (3.6V), lithium cobalate (3.7V/3.8V), lithium nickel cobalt manganate (commonly known as ternary, 3.6V), lithium iron phosphate (3.2V), lithium titanate (2.3V/2.4V) and other material systems. The voltage platform, safety factor, cycle times, energy density ratio, working temperature, etc. of the cores made of different material systems are different.

  Second, the prices of different brands of cell will also vary greatly. The overall price gradient can be divided into: special cell (including ultra-low temperature, ultra-high temperature, ultra-high magnification, and profiled cell), Japanese cell (Panasonic, Sanyo, Sony), Korean cell (Samsung, LG), domestic cell (domestic cell can be divided into first tier (Lishen, Bike, BYD, ATL), second tier, or even five tier, six tier), and cell with the same material system but different brands, The price difference will also be very large, and the quality (safety, consistency, stability) of each brand of battery cell that emerges from the survival of the fittest in the market is basically proportional to the price.

  2. Demand and Design of Lithium Battery PCM

  PCM design can be divided into: basic protection, communication, BMS

  Basic protection: basic protection includes overcharge, over discharge, overcurrent and short circuit protection, and over temperature protection can be added according to product requirements

  Communication: The communication protocol can be divided into I2C, RS485, RS232, CANBUS, HDQ, SMBUS, etc. There is also a simple electricity display, which can be indicated by a power meter and LED.

  BMS: BMS is the combination of the first letter of BATTERYMANAGEMENTSYSTEM. It is called the battery management system, commonly known as the battery nanny or battery butler. It is mainly used for intelligent management and maintenance of each battery cell, to prevent overcharge and overdischarge of the battery, to extend the service life of the battery, and to monitor the status of the battery. Its main functions include: real-time monitoring of battery physical parameters; Battery state estimation; Online diagnosis and early warning; Charge, discharge and pre charge control; Balance management and thermal management, etc. The secondary system is mostly used in electric vehicle batteries.


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