Lithium ion battery is a kind of electrochemical energy storage. At present, the development of various energy storage technologies is also different

The development of energy storage is not just to develop batteries with high specific energy. Generally speaking, the higher the specific energy, the more expensive the unit price is. Not all places need energy storage with high specific energy. Many places still pay attention to cost, such as large-scale energy storage.

Energy storage equipment has different uses in various parts of the power system

In addition to electrochemical energy storage, other ways of energy storage have also been studied by some people, and this is not enough.

Let's talk about batteries again. According to the number and scale of battery use, they can be divided into

Primary batteries, including zinc manganese dry batteries, various button batteries, etc

Small secondary batteries, including cadmium nickel batteries, nickel hydrogen batteries, lithium ion batteries, etc

Large secondary battery, i.e. battery, including sodium sulfur battery, battery, etc

Other batteries, such as fuel power cells and metal air cells, can not be counted as batteries, which is different from the above way.

The so-called primary battery is that after a discharge, the internal substances change chemically and stop using, and it cannot be recharged repeatedly.

The electrochemical reaction of the secondary battery is reversible, which can be charged and discharged for many times.

It can be found that batteries are very bulky and were invented early, but can we say that batteries are behind lithium-ion batteries?

The advantages of battery are that the electromotive force is relatively stable during discharge, the working voltage is stable, the operating temperature and current range are wide, the battery can charge and discharge hundreds of cycles, the storage performance is good (especially suitable for dry charged storage), and the cost is low, so it is widely used. The disadvantages are smaller than the energy (stored energy per unit weight), very cumbersome, highly corrosive to the environment, short cycle life, large self discharge, and difficult to over discharge.

The important thing is that it is cheap, so the batteries in the car are all made of it. Which gasoline car uses lithium batteries to ignite?

Finally, let's talk about the current development trend of lithium batteries. The most important thing is to develop all solid state batteries

Lithium ion battery is actually a lithium ion battery. The reason why metal lithium is not used is that metal lithium is too dangerous, and it is easy for dendrites to pierce the diaphragm and explode. In the future, the electrolyte will be turned into a solid, so that the lithium metal can be directly used as the electrode, and the energy density will be greatly improved.