2. It can be made into a thin battery: the capacity is 3.6V400mAh, and the thickness can be as thin as 0.5mm.
3. The battery can be designed into various shapes
4. The battery may be bent and deformed: the polymer battery can be bent up to about 900
5. It can be made into a single high voltage: a battery with a liquid electrolyte can only obtain high voltage by connecting multiple batteries in series. Since the polymer battery has no liquid, it can be made into a multi-layer combination in a single battery to achieve high voltage.
6. The capacity will be twice that of a lithium-ion battery of the same size.
First of all, we must understand the composition of lithium batteries. Today, lithium batteries on the market consist of four parts: positive electrode material, negative electrode material, electrolyte, separator and binder material.
The reason for the thermal tempering of lithium batteries lies in the positive electrode material of lithium batteries: Li is very active. Once affected by external forces, it is easy to derail, causing short circuit between the positive and negative electrodes, and then the battery heats up and catches fire. Then we see the explosion in the short circuit to the ignition process, usually only a few minutes.
At present, the industry has two methods to prevent short circuits: one is to improve the performance of the internal separator of the lithium battery so that the positive electrode and the negative electrode are not easily deviated, and the other is to use a relatively mild lithium battery. Cathode material for ion battery. The article with specific material will be described below. Mentioned.
In the development and production of lithium batteries, the choice of cathode material is the key. After years of market verification, the current mainstream cathode materials are only lithium iron phosphate, ternary lithium and lithium manganate. Each of them has its own advantages and disadvantages.
Lithium iron phosphate battery: refers to a lithium battery using lithium iron phosphate as the positive electrode material. The advantage is that it is relatively stable, safe and reusable, but has low energy density. In order to meet the same cruising range, lithium iron phosphate is larger and heavier, but the price is lower. This is why the price of Tesla’s lithium iron phosphate version will be reduced. This is also a must for the future lithium battery electric two-wheeled vehicle cathode material.
Ternary lithium battery: refers to a lithium battery in which three materials of nickel, cobalt and manganese are mixed and matched in a certain proportion as the positive electrode material. The advantage is high energy density, but the bigger disadvantage is poor safety.
Lithium manganate battery: refers to a battery that uses lithium manganate material as the positive electrode. The battery has medium energy density, average lifespan, average cycle performance, acceptable high and low temperature and reasonable price. It is a relatively medium material.
Post time: May-10-2021