Which Is A Good Round Lithium Battery

At present, there are mainly three types of circular lithium batteries: steel shell cylindrical, steel shell button type and soft wrapped circular. Each type of battery has its advantages, disadvantages and application scenarios. Want to know which round lithium battery is better? First of all, it is necessary to understand the characteristics of different circular lithium batteries, so as to make a good comparison of which circular lithium battery should be used better.

1. Steel shell cylindrical lithium battery

Cylindrical lithium batteries are limited in height. At present, many electrical appliances using batteries in the market use cylindrical lithium batteries, of which 18650 lithium-ion batteries are most widely used. The advantage of this kind of lithium-ion battery is that the manufacturing cost is relatively low, the production technology is relatively mature, the industry threshold is low, and the traditional winding process is used. It has certain disadvantages, that is, its energy density is lower than that of soft packed lithium battery, and it occupies a large product design space. Therefore, it is mostly used in larger battery products. It also has the advantage of lower price compared with soft packed lithium battery.

2. Steel shell round button lithium battery

The common disposable round button lithium battery is lithium manganese battery (code c), with a nominal voltage of 3V. Another less common disposable lithium battery is the lithium carbon fluoride battery (code B), with a nominal voltage of 3V. In addition, a commonly used secondary round button lithium battery is ml lithium battery (code ml), with a nominal voltage of 3V.

The new numbering method of IEC is usually used for the size numbering of lithium batteries. The first two digits are the diameter (unit: mm), and the last two digits are the thickness (unit: 0.1mm), whichever is closer. For example, the approximate size of CR2032 is 20mm in diameter and 3.2mm in thickness.

Application:

Because of its small size, round button batteries have been widely used in various micro electronic products, with diameters ranging from 4.8mm to 30mm and thicknesses ranging from 1.0mm to 7.7mm.

It is generally used for backup power supply of various electronic products, such as computer motherboard, electronic watch, electronic dictionary, electronic scale, remote controller, electric toy, cardiac pacemaker, electronic hearing aid, counter, camera, etc.

Button batteries are also divided into chemical batteries and physical batteries, of which chemical batteries are the most widely used. They are composed of anode (positive), cathode (negative) and electrolyte.

Its surface is made of stainless steel and serves as the positive pole. Its negative pole is a stainless steel circular cover. There is a sealing ring between the positive pole and the negative pole. The sealing ring is made of nylon. In addition to insulation, the sealing ring can also prevent electrolyte leakage.

3. Aluminum plastic film soft wrapped round lithium battery

The soft packed round lithium battery belongs to the polymer lithium battery. It adopts the laminated production process, which is higher in energy density than the first two types of batteries, and more flexible in thickness and size. At present, the Gripp lithium battery can realize a 0.4mm thick round lithium battery, which is widely used in sophisticated wearable devices. The soft packed round lithium battery can withstand a certain degree of bending deformation, which can not be achieved by the first two batteries. Under the same battery capacity requirements, the soft packed lithium battery can be made smaller and lighter, providing better development space for sophisticated wearable electronic devices, and making the product more in line with the needs of consumers.

However, the manufacturing cost of soft packed round lithium batteries is higher than that of the first two, so the battery products are more expensive.

Through the above comparison, it is impossible to generalize which is better for a circular lithium battery. It depends on what the product you design and manufacture, what the product is used for, and what the corresponding consumer group is. After considering these comprehensive factors, choose the circular lithium battery with the most appropriate price. This is the ideal product.