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Misunderstandings in daily use of lithium batteries

source:other news release time:2022-11-04 Hits:0     Popular:Lithium-ion battery wholesale

  

  (1) As for the "activation" of lithium battery, many people said that the charging time must exceed 12 hours, and the battery can only be activated after repeated three times. The statement that "the first three charging times should exceed 12 hours" is obviously related to nickel batteries (such as nickel cadmium and nickel hydrogen). Therefore, this statement can be said to have been misinterpreted at the beginning. Through sampling survey, it can be seen that some people confused the charging mode of the two batteries. The charge discharge characteristics of lithium battery and nickel battery are very different. All the strict formal technical data referred to emphasize that overcharge and overcharge will cause great damage to lithium batteries, especially liquid lithium ion batteries. Therefore, it is better to charge according to the standard time and method, especially not more than 12 hours. Generally, the charging method described in the mobile phone manual is the standard charging method applicable to mobile phones. In addition, the phone or lithium battery charger will automatically stop charging after the battery is fully charged. There is no so-called "trickle" charging for nickel battery charger for more than 10 hours. In other words, if your lithium battery is full, it is also a white charging charger. None of us can guarantee that the relevant characteristics of the battery charging and discharging protection circuit will never change, and the quality is guaranteed, so your battery will be in danger for a long time. This is another reason why we oppose long-term charges. Lithium ion battery charging and discharging cycle test table. The cycle life data is as follows: cycle life (10% DoD):> 1000 Cycle Life (100% DoD):> During 200 times, DOD is the abbreviation of discharge depth. It can be seen from the table that the charging time is related to the discharge depth. The cycle life at 10% DOD is much longer than that at 100% DOD. Of course, if the relative total capacity converted into actual charging is 10% * 1000=100100% * 200=200, then the full charging and discharging effect of the latter is better. However, the life of lithium battery is mainly reflected in the charging and discharging cycle. This cycle is an unavoidable concept. Last time, 30% of the power was used and fully charged, and next time, 70% of the power was used and fully charged. This is just a charging cycle

  (2) Therefore, lithium batteries are still used according to the slogan of the inventor of lithium batteries, "Use and charge, charge and use". Long time charging and full no-load power consumption will constitute over charging and over discharging, which will permanently damage the positive and negative poles of the lithium ion battery. From the molecular level, excessive discharge will lead to excessive release of lithium ions from negative carbon, resulting in the reduction of its layered structure. Overcharging will force too many lithium ions into the negative carbon structure, which is why lithium ion batteries are usually equipped with charge discharge control circuits. Lithium ion batteries are usually equipped with processing chips and charging control chips. There are a series of registers in the processing chip, including storage capacity, temperature, ID, charging state, discharge time, etc. These values change gradually in the application. In the application description, "it shall be fully charged and discharged once a month or so". The main function of this method is to correct the incorrect values in these registers, so that the charging control and nominal capacity of the battery conform to the actual state of the battery. The power calculation chip can collect and calculate the battery power after recording the discharge curve (voltage, current and time), that is, wh. The value we read in information. The discharge curve of lithium ion battery will change after multiple use. If the chip has never had the opportunity to read the complete discharge curve again, the calculated power is inaccurate. Therefore, it is necessary to conduct deep charge discharge calibration for the battery chip. Correct methods for the first three times of charging of lithium battery and precautions for daily use. During the first three times of charging, there is no need to charge at abnormal time. For example, after 12 hours of battery activation, the charging circuit is protected, and it is useless to plug in the power supply. During normal operation, avoid complete discharge (when the black screen is powered off). The best way is to buy a second battery and replace it in time. If it is not used for a long time, it may be charged and reused. After a period of time, the method is to fully charge and discharge, and then the battery can be used and charged immediately. As long as it is used for a long time, it needs to be recharged and discharged. Assuming that it is not necessary to charge the battery for a long time, it is recommended to charge it to 40% and then place it to protect the battery. After all, the life of lithium battery is mainly reflected in the charging and discharging cycle. This cycle is an unavoidable concept. Last time, 30% of the power was used and fully charged, and next time, 70% of the power was used and fully charged. This is just a charging cycle. When to start charging in normal use: We often see a saying: Because the number of charging and discharging is limited, we should use up the battery of the phone and charge it as much as possible.


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