I. Origin of polymer lithium-ion battery: 1: Through gluing → batching → coating → baking → rolling → cutting → weighing → ear → adhesive tape → powder sweeping → packaging and film cutting → machine winding → core pressing → short-circuit measurement → front sealing → one-side sealing → zero-current measurement → vacuum baking → liquid injection sealing → bending → finished product detection. Second, precautions for polymer batteries: Disadvantages: (general) 1. Frequent use of universal charger is very harmful to the battery. Its advantage is that it can be used as an emergency power supply, but it is mostly the simplest RC step-down. RC constitutes a difference channel, resulting in the input waveform of the power supply. Using the simplest power supply circuit, the power supply quality is relatively poor. 2. Overcharging and discharging will cause great damage to the battery. There will be side effects such as the decrease of active substances, the increase of garbage substances, the decrease of capacity and the increase of internal resistance in the battery, so that it does not have normal charging and starting conditions. Serious overcharge directly damages the battery structure, resulting in battery scrap. 3. The ambient temperature will also affect the battery life. Too high or too low temperature will lead to the loss of battery life. As can be seen from the first one, the new polymer lithium-ion batteries are all rechargeable. Polymer lithium-ion batteries need to be transported and stored in a semi-charged state. If the received polymer lithium-ion battery is low or even dead, it means that the battery has been stored for a long time or its self-discharge is too large. Polymer lithium-ion batteries can be charged at any time in daily use because of almost no memory effect, which has limited influence on the battery cycle life. Battery cycle life: refers to the number of times the battery is fully charged and discharged. For example, after charging and discharging for n times, the battery capacity decreases slightly, and n is the cycle life. But the battery can still be used when the actual capacity drops to 85%. Even if the battery is charged in advance, you don't really lose the charging cycle life of "1", that is, "0.x" times, and often this x will be very small. For example, the international standard data requirements of cycle life are as follows: (DOD is the abbreviation of discharge depth) Cycle life (10% DOD): >; 1000 cycle life (100%DOD):>200 times. As can be seen from the list, the cycle life under 10%DOD is much longer than that under 100%DOD. In this regard, the website of foreign battery university recently put forward a new conclusion about the use and life of batteries. The best maintenance method of lithium-ion battery is to use it lightly, discharge it quickly and charge it quickly. This is similar to the use of mechanical equipment. The greater the frequency and frequency, the faster the battery loss. The less deep discharge of lithium battery, the longer the service life. If possible, try to avoid starting charging when the battery is low, and don't run out of batteries under any circumstances. Only when the battery is calibrated, deep charging is needed. The internal protection circuit of polymer lithium-ion battery is aimed at the safety of the battery, and has no effect on overcharging caused by slight overvoltage, overcurrent and long-term charging. Maintenance notice: (in general) 1. Charge according to the instruction and standard time and method. Do not use the original ordinary seat charger, especially avoid charging at night (high grid voltage); 2. Use the battery that automatically shuts down to avoid repeated forced startup. Don't turn it on repeatedly after turning it off, which may lead to the protection problem of the mobile phone or battery, and the output can't be charged after power off. 3. Lithium-ion battery should be lightly charged. Safety standard: Lithium polymer is the safest lithium battery. Because there is no hard metal shell, even if there is an abnormal situation, it will not explode as long as it meets the national standards. Attached with safety standard conditions: ① Full protection circuit and two or more safety batteries (overvoltage, overcurrent, undervoltage, etc.). ) is required. Even if the battery electrode is short-circuited, it will be automatically disconnected by the protection circuit, and the output voltage is zero, so it will not explode. (2) Even if the protection circuit is removed, that is, even if the protection circuit fails and the battery core is directly short-circuited, the normal batteries that meet the national standards are all aluminum-clad safety batteries. Due to the violent gas release reaction caused by short circuit and puncture, the internal pressure of the battery rises to a certain extent, and the exhaust valve is opened to exhaust, so it will not explode. (3) Even if the exhaust valve fails, the soft aluminum shell will expand due to internal pressure, and to a certain extent, it will burst and deflate without explosion. The content of the above article was completed by the author through consulting various materials and personal understanding. Please feel free to ask me if there are any mistakes.