One article knows the daily application of lithium batteries

Introduction and working principle of lithium batteries Since the advent of lithium batteries in 1990, they have developed rapidly due to their excellent performance and have been widely used in society. Lithium batteries are rapidly occupying many fields, such as the familiar cell phones, notebook computers and small video cameras, and their advantages are unmatched by other batteries. Traditional nickel-cadmium batteries (Ni/Cd) and nickel-metal hydride batteries (Ni/MH) are often used to describe the advantages of lithium batteries. It has the advantages of high working voltage, long specific energy, long cycle life, low self-discharge rate, and no recall effect. 2. Know the daily applications of lithium batteries (1) Misunderstanding: The battery is activated, the first three charging more than 12 hours, there are many opinions that the charging time must be more than 12 hours, and the battery can be activated by repeating three times. The statement that the first three charging times should exceed 12 hours is largely derived from the statement that nickel batteries (such as nickel cadmium and nickel metal hydride) continue to be charged. So this is a misinformation. After sampling, we can see that quite a few people have mixed two battery charging methods. The charge and discharge characteristics of lithium batteries and nickel batteries are very different. All serious official technical data have been reviewed, emphasizing that overcharge and overdischarge will cause great damage to lithium batteries, especially liquid lithium batteries. Therefore, it is best to charge according to the standard time and charging method, especially not to exceed 12 hours of long-term charging. Normally, the charging method described in the mobile phone manual is a standard charging method suitable for mobile phones. (2) The charging time is short, and the battery is completely used up and then recharged. When the battery is full, the mobile phone or charger with the lithium battery will automatically stop charging. There is no such thing as trickle charging, which can last for 10 hours with a nickel charger. If the lithium battery is charged and placed on the charger, it will no longer be charged. Extraordinary moments with empty battery charging and completely may lead to overcharging and discharging, permanent damage to the electrodes of lithium batteries, from the molecular level, anode carbon emissions will cause excessive release of lithium ions and its layer structure in the fall, overcharging will Too much lithium ions are forced into the structure of the cathode carbon, and some lithium ions can no longer be released. (3) Battery life The cycle life data in the lithium battery charge and discharge cycle experiment table is as follows (DOD is the abbreviation of depth of discharge): Cycle life (10% DOD): >1000 Cycle cycle life (100% DOD): >200 times from above The data shows that the number of charging times is related to the depth of discharge, and the cycle life of 10% DOD is much longer than that of 100% DOD. Of course, if it is equivalent to 10%*1000u003d100, 100%*200u003d200 of the relative total capacity of actual charging, the latter is still better for complete charging and discharging. However, the life of a lithium battery is importantly reflected in the charge and discharge cycle. This cycle is a positive concept. The last time you use 30% of the power, it is fully charged, and the next time you use 70% of the power, it is fully charged. This is just a charging cycle. Therefore, it still follows the slogan of the inventor of the lithium battery that is rechargeable, rechargeable, and ready to use to use lithium batteries. (4) Battery calibration depth Charge and discharge lithium batteries on time, usually with a management chip and a charge control chip. In the management process, the chip has a series of registers, such as capacity, temperature, ID, charging status, and discharging time. These values u200bu200bgradually change with the application. The important function of using the instructions charged once a month is to correct the erroneous values u200bu200bin these registers. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.