Explain the principle of battery charging and charging process -Lithium - Ion Battery Equipment
Lithium -ion battery manufacturers explain the charging principle and charging process of lithium -ion battery. Lithium -ion batteries are widely used in portable electronic equipment such as mobile phones, videos, laptops, ropeless telephones, electric tools, remote control or electric toys, cameras, etc. with their excellent characteristics. Because of its excellent circulation performance, fast charging and discharge, charging efficiency as high as 100%, and large output power, long service life, does not contain toxic and harmful substances, is called a green battery. Today, let's talk about the lithium -ion battery manufacturer explained the charging principle and charging process of lithium -ion batteries.(Lithium - Ion Battery Equipment)
Lithium ion battery charging principle
Phase 1: Target charging -trickle charging is used to pre -charging the battery unit that is completely discharged. When the voltage of the lithium ion battery is less than 3V, the trickle charging is used. The torque charging current is one -tenth of the constant current charging current, which is 0.1C.
Phase 2: Hengli charging -When the voltage of the lithium ion battery rises above the trickle charging threshold, increase the charging current for constant current charging. The current charging current is between 0.2C and 1.0C. The voltage of lithium-ion batteries gradually increases with the constant current charging process. The voltage set by a single-section battery is 3.0-4.2V.
Phase 3: Constant voltage charging -When the voltage of the lithium ion battery rises to 4.2V, the constant current charging ends and the constant voltage charging stage begins. According to the saturation level of the cell, the current is slowly reduced as the continuous charging process of the charging process is slowly decreased. When it is reduced to 0.01C, the charging is considered to be terminated.
Phase 4: Charging termination -There are two typical charging ending methods: 1. Use the minimum charging current to judge or use a time -to -time device. The minimum current method monitor the charging current during the convergence charging phase, and end the charging when the charging current is reduced to 0.02C to 0.07C. 2. The second method starts at the time of the constant voltage charging phase, and the charging process is terminated after two hours of continuous charging.
Lithium -ion battery charging process
The charging process of lithium -ion batteries can usually be divided into pre -charging, fast charging, replenishing charging, and charging.
1. Battery pre -charging
When charging long -term or new batteries, fast charging from the beginning will affect the life of the battery. Therefore, this battery should be charged with a small current to meet certain charging conditions. This stage is called a pre -charging.
2. Quickly charge the battery
Quick charging is to charge with large current to quickly restore battery power. The fast charging rate is generally above 1C, and the fast charge time is determined by the battery star and charging rate. Quick charging division of Hengli charging and pulse charging. The constant current charging is charging the current with constant current. Pulse charging is to charge the battery with pulse current, and then discharge the battery, so this cycle.
3. Battery replenishment charging
When some fast charging methods are adopted, the battery is not sufficient after the fast charging is terminated. In order to ensure the charge of 100%of the power, the repayment process should also be added. Make up the charging rate generally does not exceed 0.3C.
4. Battery trickle charging
In the process of replenishing the charging process, the temperature will continue to rise. When the temperature exceeds the specified limit, the charger is transferred to the trickle charging state. In order to ensure that the battery is charged, it can be used on time control, voltage control, and temperature control. At present, the comprehensive control method includes on time control, voltage control and temperature control in fast chargers.
It is not difficult to see that during the charging and discharge of lithium ion batteries, lithium ions are in the motion state of the positive electrode → negative electrode → the ahead. If we compare the image of a lithium ion battery to a rocking chair, the ends of the rocking chair are the poles of the battery, and the lithium ion is like an excellent sportsman, running back and forth on both ends of the rock chair. Therefore, the experts gave a lovely name rocking chair battery for lithium ion batteries.
Lithium ion battery charging principle
Phase 1: Target charging -trickle charging is used to pre -charging the battery unit that is completely discharged. When the voltage of the lithium ion battery is less than 3V, the trickle charging is used. The torque charging current is one -tenth of the constant current charging current, which is 0.1C.
Phase 2: Hengli charging -When the voltage of the lithium ion battery rises above the trickle charging threshold, increase the charging current for constant current charging. The current charging current is between 0.2C and 1.0C. The voltage of lithium-ion batteries gradually increases with the constant current charging process. The voltage set by a single-section battery is 3.0-4.2V.
Phase 3: Constant voltage charging -When the voltage of the lithium ion battery rises to 4.2V, the constant current charging ends and the constant voltage charging stage begins. According to the saturation level of the cell, the current is slowly reduced as the continuous charging process of the charging process is slowly decreased. When it is reduced to 0.01C, the charging is considered to be terminated.
Phase 4: Charging termination -There are two typical charging ending methods: 1. Use the minimum charging current to judge or use a time -to -time device. The minimum current method monitor the charging current during the convergence charging phase, and end the charging when the charging current is reduced to 0.02C to 0.07C. 2. The second method starts at the time of the constant voltage charging phase, and the charging process is terminated after two hours of continuous charging.
Lithium -ion battery charging process
The charging process of lithium -ion batteries can usually be divided into pre -charging, fast charging, replenishing charging, and charging.
1. Battery pre -charging
When charging long -term or new batteries, fast charging from the beginning will affect the life of the battery. Therefore, this battery should be charged with a small current to meet certain charging conditions. This stage is called a pre -charging.
2. Quickly charge the battery
Quick charging is to charge with large current to quickly restore battery power. The fast charging rate is generally above 1C, and the fast charge time is determined by the battery star and charging rate. Quick charging division of Hengli charging and pulse charging. The constant current charging is charging the current with constant current. Pulse charging is to charge the battery with pulse current, and then discharge the battery, so this cycle.
3. Battery replenishment charging
When some fast charging methods are adopted, the battery is not sufficient after the fast charging is terminated. In order to ensure the charge of 100%of the power, the repayment process should also be added. Make up the charging rate generally does not exceed 0.3C.
4. Battery trickle charging
In the process of replenishing the charging process, the temperature will continue to rise. When the temperature exceeds the specified limit, the charger is transferred to the trickle charging state. In order to ensure that the battery is charged, it can be used on time control, voltage control, and temperature control. At present, the comprehensive control method includes on time control, voltage control and temperature control in fast chargers.
It is not difficult to see that during the charging and discharge of lithium ion batteries, lithium ions are in the motion state of the positive electrode → negative electrode → the ahead. If we compare the image of a lithium ion battery to a rocking chair, the ends of the rocking chair are the poles of the battery, and the lithium ion is like an excellent sportsman, running back and forth on both ends of the rock chair. Therefore, the experts gave a lovely name rocking chair battery for lithium ion batteries.
