Polymer lithium batteries, what do you know?

Polymer lithium batteries are a type of lithium ion batteries, but they have many obvious advantages such as high energy density, smaller, ultra-thin, lightweight, and high safety and low cost compared to lithium-ion batteries. It is a new type of battery. Below we describe in detail the advantages and disadvantages of polymer lithium batteries.

Polymer lithium battery

First, advantages:

1. Good Safety Performance

Polymer lithium batteries are structurally packaged with aluminum plastic, which is different from the metal shell of the liquid core. Once a safety hazard occurs, the liquid core is prone to explosion, and the polymer core is only a drum.

2. Thick, make it thinner

Very thin, batteries can be assembled into credit cards. Ordinary liquid lithium electricity adopts the method of customizing the shell first and plugging the positive and negative material later. There is a technical bottleneck below 3.6 mm in thickness, and the polymer core does not have this problem. The thickness can be below 1mm, which is in line with the current mobile phone. Demand direction.

3. Light weight

Batteries using polymer electrolytes do not require metal shells for protective packaging. Polymer battery weight is 40 % lighter than steel shell lithium with the same capacity specification and 20 % lighter than aluminum shell battery.

4. Large capacity

Polymer batteries have a capacity of 10 to 15 % higher than steel shell batteries of the same size and 5 to 10 % higher than aluminum shell batteries. They have become the first choice for color screen mobile phones and MMS mobile phones. Nowadays, new color screens and MMS mobile phones are also on the market. Most use polymer cores.

5. Small internal resistance

The internal resistance of the polymer core is smaller than that of the general liquid core. At present, the internal resistance of the domestic polymer core can even be below 35mΩ, which greatly reduces the battery's self-consumption and extends the standby time of the mobile phone. It can be achieved. International level. This polymer lithium, which supports large discharge currents, is an ideal choice for remote control models and is the most promising alternative to nickel-metal hydride batteries.

6. Shapes can be customized

Manufacturers do not have to be limited to standard shapes and can economically make the right size. Polymer batteries can increase or reduce the core thickness according to customer demand, develop new core models, cheap, short opening cycle, and some can even be tailored to the shape of the phone to make full use of battery housing space and increase battery capacity.

7. Good discharge characteristics

Polymer batteries use colloidal electrolytes. Compared with liquid electrolytes, colloidal electrolytes have stable discharge characteristics and higher discharge platforms.

8. Simple design of protective panels

Due to the use of polymer materials, the core does not catch fire and does not explode. The core itself has sufficient safety. Therefore, the protection line design of the polymer battery can consider omitting the PTC and fuse, thereby saving battery costs.

Second, shortcomings:

Compared with lithium-ion batteries, energy density and cycle times have decreased.

Manufacturing is expensive.

Without a standard shape, most batteries are manufactured for the high-capacity consumer market.

Compared with lithium-ion batteries, the price and energy are higher.

The page contains the contents of the machine translation.