The Comprehensive Knowledge of Laptop Battery Cells
At present, the majority of notebook computer batteries are based on industry-standard batteries cells, generally divided into two kinds —— cylindrical and square. Most of the laptop battery is made up of cylindrical battery cells.
The current laptop battery made from batteries cells by series-parallel connection, there are commonly 4, 6, 8, 9, 12 cells battery in the market.
4 cells = 2 series – 2 parallel
6 cells = 3 series – 2 parallel
8 cells = 4 series – 2 parallel
9 cells = 3 series – 3 parallel
12 cells = 4 series – 3 parallel (Our Hgh Capacity HP PAVILION DV9000 Battery is 12 cells )
A cell voltage (unit: Volt) = 3.6V or 3.7V
A cell electric quantity (unit: mAh) = 1800/ 2000/ 2200/ 2400/ 2600/ 2800mAh
Mainstream laptops are the 3-series 3-parallel 9-cell battery, we descrip the composition of the battery take an example of 6600mAh, 11.1V Dell XPS M1330 Battery below.
We assume that cell voltage u = 3.7V; 2200mAh (batteries electricity = mAH)
Since 3 conspiracy, so the battery voltage U total = 3.7V * 3 = 11.1V
Since 2 and, therefore, the battery charge = 2200* 3 = 6600(mAH)
Battery module total capacity = 11.1 * 6600/1000 = 73WH
Minimum load notebook power state for 13w (ideal)
Battery time = 73WH/13W = 5.6 hours
Note: the above data for all of us understand the principles set by the battery composition, different manufacturers battery not identical.
The Types of Laptop Batteries Cell
Manufacturers classified into four categories ABCD ( Sanyo distinction, Sanyo and Panasonic distinction mode actually has become industry standards) in the production of the identical batch depending on the battery discharge test performance, a = 2000MAH, b = 2200MAH, c = 2600MAH, d=2400MAH, print distinguish code on ABCD in the battery, and then simultaneously to distinguish by battery protection gas cover color (battery willproduct gas when discharge, batteries have a protective cap, deflated when the battery to a certain amount of time, that is to say will reach the design life quickly gas will lift the lid to open, allowing for battery removal), this is the source of ABCD, due to Sanyo and Panasonic strength, this also became the default distinction in the industry. Of course, this subject to restrictions on production technology, currently Sanyo stopped original 2400mah batteries internal material composition, formulation of new material instead, so that at present, the production of 2000-2600mah SANYO batteries, are virtually different quality products in identical line.
Sanyo 18650 Battery Cells Distinction
white head, yellow head — 1950mah
Blue head — 2000mah
Red head — 2200mah within the internal resistance: 53-58
Green head — 2400mah
Light blue head — 2600mah
Panasonic 18650 Battery Cells Distinction
model capacity color
blue cgr18650 1200mah
pink cgr18650 1350mah
yellow cgr18650hm 1600mah
orange cgr18650hg 1800mah
purple cgr18650HGL 1800mah
light green cgr18650a 2000mah
light red cgr18650cb 2060mah
light blue cgr18650c 2200mah
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