Regardless of small cylindrical batteries for the number of controversial EV, 18650 lifepo4 batteries due to high energy density and cost-effective, as more and more passenger cars and logistics vehicles, an important choice. 18650 has the advantage of high maturity, high consistency, energy density, cost, flexible arrangement of high; disadvantage is the number of pack high difficulty, quality control points.
The larger single cells can also make the pack look easier by changing the internal design, dramatically increasing life, magnification, etc., but at the same time significantly reducing energy density (size and weight) and reducing assembly space utilization Flexibility, high-energy-density large-size batteries, most of the low degree of automation, process and other adverse cost is high, consistency is poor, and once the failure of the terrible consequences.
At present, the advantages of cylindrical batteries to a large extent due to size standardization, product maturity and cost competitiveness, and standardization must be strong correlation; larger cylinder 26/32, etc. has been unable to become mainstream; ready to come out of the new size 20/21, the market itself is a balance of many factors and 18650 lifepo4 battery pack based on the balance of the existing advantages of choice!
Capacity per 10% increase in capacity, charge and discharge rate reduced by 30-40%; capacity for each 10% increase in capacity per cycle, life cycle, , The temperature rise will increase by about 20%, and a geometric rise; energy density, the higher the risk of greater security.
18650 with 523+ graphite system, according to the new national standard, 1C to 2.4AH has reached the design limit, higher energy density materials (NCA, 811, etc.) itself stability and process control, not imagined so easy. so, not yet easy to use, but more expensive.
没有评论:
发表评论