The description of the main type lithium ion battery

Source: 2020 - 03 - 28 15:59 hits: times the main kind of lithium ion battery electrolyte material for lithium-ion battery according to the use of different, divided into liquid lithium ion battery ( 自由) And polymer lithium ion battery, PLB) 。 Lithium ion battery, Lithium ions) Rechargeable lithium ion battery is in the modern digital products, such as mobile phones, laptops, the most widely used batteries, but it is more 'fine', in use can't overcharge, excessive release ( Can damage the battery or the scrap) 。 Therefore, it is to protect components or battery protection circuit, in order to prevent damage of expensive battery. Lithium ion battery requirement is very high, in order to ensure accuracy of terminal voltage & plusmn; Within 1%, the semiconductor device factory have developed a variety of lithium-ion battery charging IC, to ensure safe, reliable and fast charging. Most of the mobile phone use lithium ion battery. The correct use of lithium ion battery is very important to extend battery life. According to the requirements of various electronic products, flat rectangular, cylindrical, rectangular, buckle and so on. Due to the change of material, rated voltage of the lithium ion battery is commonly 3. 7 v, and lithium iron phosphate ( Hereinafter referred to as the iron phosphate) Are very 3. 2v。 When fully charged, the charging voltage terminal is commonly 4. V 2 and 3. 65v。 The terminals of the lithium ion battery discharge voltage is 2. 75 v ~ 3。 0v( Battery manufacturers are working voltage range, or terminal discharge voltage, the parameters is slightly different, generally for 3. 0 v, phosphorus iron 2. 5v) 。 Less than 2. 5V( Phosphorus iron 2. 0V) Continuous discharge called over discharge, discharge will cause damage to the battery. Cobalt acid lithium materials as anode of lithium ion battery is not suitable for large current discharge. When large discharge current, discharge time can be shortened ( Internal temperature rise, energy loss) And may cause danger. However, lithium batteries, lithium iron phosphate battery anode materials can use 20 c or above ( C is the capacity of the battery, such as C = 800 mah, the charging rate of 1 C to 800 ma) Large current charge and discharge, is especially suitable for electric vehicles. Therefore, battery manufacturers give maximum discharge current should be less than the maximum discharge current in use. Lithium-ion batteries have a certain request for temperature. Factory gives the filling temperature, discharge temperature and storage temperature range. Overvoltage can cause permanent damage to the lithium ion battery charging. Lithium ion battery charging current should be in accordance with the battery manufacturer's recommendations, and a limited current circuit is required to avoid flow ( Overheating) 。 The commonly used charging rate is 0. 25C ~ 1C。 When in high current charge, usually test the temperature of the battery, in order to prevent the battery overheat, overheating can damage the battery or cause explosion. Lithium ion batteries are divided into two phases: constant current charging, close to the terminal voltage to constant voltage charging. In 800 mah battery, for example, the charging terminal voltage is 4. 2v。 In a 800 ma cell ( Charging rate 1 c) Constant current charging, the battery voltage with a larger slope booster start, when the battery voltage is close to 4. 2 V to 4. 2 V constant voltage charging, gradual decline in the current, voltage change is not big, charging current - 1/10 50 c ( GeChang have different values, do not affect use) , close to full, may terminate charging ( Start the timer 1/10 c after some charger, charging after a certain period of time) 。