22 Years' Battery Customization

Briefly describe the main parameters of lithium ion batteries

Jun 14, 2019   Pageview:466

1) Battery capacity

 

The battery capacity is expressed in milliampere-hour mAh, the larger the battery capacity, the longer the apparent length of time. Commonly, for example, the meaning of 1000 mAh is the amount of charge discharged at a current of 1000 mA for 1 h.

 

2) Nominal voltage

 

The potential difference between the positive and negative terminals of the battery is called the nominal voltage. Lithium battery discharge trajectory is parabolic, from 4.3v to 3.7v to 3.0v, all change very quickly, only 3.7v or so discharge time is the longest, almost 3/4 time, therefore, the nominal voltage It also sometimes indicates the voltage that sustains the longest discharge time. The nominal voltage of lithium batteries is 3.7v and 3.8v.

 

3) Charge cut-off voltage

 

After the lithium battery (or other rechargeable battery) is fully charged, the active material inside the battery has reached saturation state, and then continues to charge, the battery voltage will not rise, and the voltage at this time is the charging termination voltage. Lithium battery charging termination voltage is usually 4.2v (corresponding to its nominal voltage is 3.7v) and 4.35v (its nominal voltage is 3.8v)

 

4) Discharge cutoff voltage

 

The discharge termination voltage refers to the minimum voltage allowed when the battery is discharged. The discharge termination voltage of the lithium battery is generally 2.7v.

 

5) Self-discharge rate

 

Refers to the battery is used for a period of time, the amount of automatically lost capacity as a percentage of the total capacity. Lithium battery self-discharge rate is 5%~8%

 

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