Knowing the composition of a lithium battery, it is easier to understand the working principle of lithium battery. The working principle of lithium battery is actually a process of filling and discharge. This is actually the process of embedding and departure of lithium ions mentioned above.

　　1. Battery charging

　　When the battery is charged, there will be lithium ions to be generated in the positive electrode of the battery, and the generated lithium ion will be electrolyte to the negative electrode. These lithium ions will be embedded in the negative electrode. The more lithium ions are embedded, the higher the charging capacity.

　　2. Battery discharge

　　Normal battery is the process of discharge. At this time, the charging part of the battery is opposite. The lithium ion embedded in the negative electrode away from returning to the positive electrode, the more lithium ion returned to the positive electrode, the higher the capacity of the discharge.

　　During each charging and discharge cycle, lithium ions (Li+) act as the role of electrical energy handling carrier, and constantly realize the positive electrode → negative pole → the reciprocating movement of the positive electrode, so that the positive and negative electrode will have a chemical response, and the chemical energy and electrical energy will convey each other. To achieve charge transfer, this is the principle of lithium battery working.

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