How to distinguish the quality of lithium batteries from good or bad?

What are the important parameters of lithium batteries? How to distinguish the quality of lithium batteries is good or bad, the following is the explanation of Shanghai Bao'e Industrial Co., Ltd.: 1. Battery capacity The capacity of the battery depends on the amount of active material in the battery, usually in milliamperes Hour (mAh) or ampere hour (Ah) is expressed. For example, 1000 milliamperes discharged with 1A current for 1 hour can be converted into electricity of about 3,600 degrees Celsius. The internal structure of the lithium battery 2. Rated voltage The potential difference between the positive electrode and the negative electrode of the battery is called the rated voltage of the battery. The nominal voltage is determined by the electrode potential of the sheet information and the concentration of the internal electrolyte. Lithium battery discharge voltage is parabolic, 4.3v~3.7v, 3.7v~3.0v change quickly. The longest discharge time is only about 3.7v, which accounts for about 3≤4. Therefore, the nominal voltage of a lithium battery refers to the voltage that sustains the longest discharge time. The nominal voltage of the lithium battery is 3.7v and 3.8v respectively. The charge stop voltage of the battery is 4.2v for 3.7v, and 4.35v for 3.8v. The working principle of the lithium battery 3. Stop the charging voltage When the rechargeable battery is fully charged, the active material on the plate reaches a saturated state. If the battery is continuously charged, the battery voltage will not increase. At this time, this voltage is called the charge stop voltage. The voltage of the lithium battery is 4.2v or 4.35v. 4. Discharge stop voltage The discharge stop voltage is the minimum voltage allowed when the battery is discharged. The discharge stop voltage is related to the discharge rate. Generally speaking, the unit of lithium battery is 2.7V. 5. The internal resistance of the battery The internal resistance of the battery depends on the resistance of the battery electrodes and the resistance of the ion current. During the charging and discharging process, the resistance of the image engine and the electrodes remain unchanged, but the resistance of the ion current changes with the electrolyte concentration and the addition of charged ions. When the OCV voltage of the lithium battery drops, the impedance increases. Therefore, in the case of low charging power (less than 3V), pre-charging (drip charging) should be carried out first to prevent excessive heat from being over-current. The working principle of lithium battery Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete.