Analysis of the core component of electric vehicles: power lithium battery

Analysis of the core components of electric vehicles: power lithium batteries are so important to electric vehicles that it is the core of the three-electric system and the lifeblood of electric vehicles. Which car company has mastered battery technology will have the most ideal competitiveness in the market. For example, BYD, one of its own brands, not only has good sales of electric vehicles, but also leads the list of sales of plug-in hybrid vehicles. Lithium batteries are so important, do you really know them? In fact, batteries have a long history. As early as 1800, Professor Volta of Italy created the world's first battery pack and named it a voltaic reactor. But the voltaic reactor is a kind of disposable battery. It was not until 1859 that the French inventor Plante created the world's first rechargeable lead-acid battery. Lithium batteries did not go on the market until 1991, and that was a matter of many years later. After the advent of lithium batteries, the advantages of large capacity, high voltage and good cycle characteristics were quickly obtained in many battery products. There are many kinds of lithium batteries, such as lithium titanate batteries, lithium iron phosphate batteries, and lithium cobalt oxide batteries. These lithium batteries use lithium metal or lithium-containing metal alloys as the positive electrode, and carbon rod graphite and other materials as the negative electrode, and have similar structures and working principles. The name of the battery is important to name the battery according to the positive data used. The working principle of lithium battery: Take the operating process of lithium cobalt oxide battery as an example: when charging, the lithium element of the positive electrode is guessed by the method of positively charged lithium ion (Li+), and from the positive electrode to the negative electrode through the electrolyte in the external electric field Under the application, the method of reacting data with the negative electrode and inserting the LiC6 data into the hole of the negative electrode. The discharge process is exactly the opposite of the charging process. During discharge, the lithium ion becomes the lithium ion (Li+) method. The anolyte of the electric field force along the direction and the lithium ion positive electrode bear a positively charged lithium ion. Inheriting a negatively charged electron, this moving anode lithium ion can become an electrically neutral safety condition. But because the barrier film and electrolyte of the battery are both insulators, electrons can only reach the positive electrode through the load circuit connecting the north and south poles to meet the lithium ions, and the electrons move to the positive electrode to form a current. (It's just that the electrons are negatively charged, so the current is opposite to the electrons, and because the electrodes gain and lose electrons, the cathode and anode of the battery are called the north and south poles. I will not discuss it in detail to prevent confusion.) Batteries are electric It is of great significance to the car. Because of the working characteristics of the lithium battery, it plays a very important role in the capacity and discharge power of the lithium battery. The more lithium ions, the greater the capacity of the battery. The more lithium ions are released per unit time, the higher the discharge power of the battery. In the acceleration of a pure electric vehicle, the demand for the battery provides a large amount of instantaneous output for the motor, so the function of the battery will affect the acceleration of the car. Speaking of pure electric vehicles, we have to mention the endurance of electric vehicles. Since the number of electric car colleagues around has gradually increased (including two-wheeled electric cars, such as Niu N1, etc.), we seem to suffer from a disease called travel anxiety. Especially with regard to cars with shorter driving distances, some car owners even joked that they began to worry about the journey from the moment they unplug the battery. The lack of battery life in all-electric vehicles can now only be solved by improving battery technology. Although graphene batteries, lithium-sulfur batteries, and lithium-ion air batteries all have new technologies, these technologies are still in the laboratory stage. In the process of commercialization, technology is only the first step, and then there are security and cost issues. Therefore, the short-board journey can be dealt with quickly, and it can also be seen that automobile companies are unhappy with the broadband of new products. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it.