What are the important parameters of lithium batteries?

Six important parameters of lithium batteries: Lithium battery structure 1. Battery capacity The capacity of the battery is determined by the amount of active material in the battery, usually expressed in milliampere-hour mAh or Ah. For example, 1000mAh can be converted into a charge of about 3600C with a current of 1A for 1h. 2. The potential difference between the positive and negative electrodes of the battery at nominal voltage is called the nominal voltage of the battery. The nominal voltage is determined by the electrode potential of the plate material and the concentration of the internal electrolyte. The discharge diagram of lithium battery is parabolic, with 4.3V dropping to 3.7V and 3.7V dropping to 3.0V, both of which change rapidly. Only the discharge time of about 3.7V is the longest, accounting for almost 3/4 of the time, so the nominal voltage of the lithium battery refers to the voltage that maintains the longest discharge time. The nominal voltage of the lithium battery is 3.7V and 3.8V. If it is 3.7V, the end-of-charge voltage is 4.2V, if it is 3.8V, the end-of-charge voltage is 4.35V. Lithium battery working principle 3. Charge termination voltage When the rechargeable battery is fully charged, the active material on the plate has reached a saturated state, and then continue to charge, the battery voltage will not rise, the voltage at this time is called the charge termination voltage. The lithium battery is 4.2V or 4.35V. 4. End-of-discharge voltage The end-of-discharge voltage refers to the lowest voltage allowed when the battery is discharged. The discharge termination voltage is related to the discharge rate. Generally speaking, the unit lithium battery is 2.7V. 5. The internal resistance of the battery The internal resistance of the battery is determined by the resistance of the electrode plate and the resistance of the ion current. During the charging and discharging process, the resistance of the image engine and the electrode remains unchanged, but the resistance of the ion current will vary with the concentration of the electrolyte. It changes with the increase or decrease of charged ions. When the OCV voltage of the lithium battery decreases, the impedance will increase. Therefore, when charging at low power (less than 3V), pre-charge (trickle charging) should be carried out first to prevent excessive current from causing excessive heat generation of the 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. Previous article: How to use lithium battery electrolyte?