18650 battery 3.7v 2000mah

　　Causes of 18650 battery 3.7v 2000mah explosion:

　　1. High degree of internal polarization;

　　2. The film absorbs moisture, and the 18650 battery 3.7v 2000mah electrolyte reflects the air drum;

　　3. The quality and characteristics of 18650 battery 3.7v 2000mah electrolytes are poor.

　　4. The water injection rate does not comply with the processing technology;

　　5. Laser welding seal has poor characteristics and steam leakage during installation.

　　6. Smoke and dust first cause micro-short circuit failure.

　　7. The positive and negative films are thicker than the processing technology, and it is difficult to enter the shell.

　　8. Injection sealing is difficult, and the sealing performance of rigid beads is not enough to cause air bulging.

　　9. The shell wall thickness and shell deformation damage are small.

　　Analysis of 18650 battery 3.7v 2000mah explosion types:

　　Lithium-ion explosion can be divided into external short-circuit fault, internal short-circuit fault and overcharge.

　　The outside world here refers to the outside of the lithium-ion cell, including lithium-ion failures due to poorly designed internal insulation layers. When there is a short-circuit fault outside the lithium-ion battery and the electronic components cannot disconnect the control circuit, high combustion will occur inside the lithium-ion battery, causing the electrolyte of some lithium-ion batteries and the battery shell to become larger. When the internal temperature of the rechargeable battery reaches 135°C, the cost-effective diaphragm will close the small holes, electrochemical corrosion stops or almost stops, the current drops sharply, and the temperature gradually decreases to avoid explosion. However, if the micropore gap rate is low, or the micropores are not easy to close the diaphragm paper at all, the battery temperature will rise again, and a large amount of 18650 battery 3.7v 2000mah electrolyte will liquefy and liquefy, which will eventually charge the battery shell, or even cause the battery temperature to ignite and explode the material.

　　Internal short circuit failure is due to penetration between copper and platinum at the capillary edge of the diaphragm, or the formation of lithium molecules. This tiny fibrous metal material can cause micro-short circuit failures. Because the needle is thin and has a certain resistance, the current may not be very large. Observed conditions are running too fast and most can be screened out by Li-ion or assembly plants. At the same time, because the edges of the hair are so small, they sometimes get burned, causing the battery to recover. Therefore, the probability of explosion due to short circuit failure is not high. Such a method can apply statistical analysis from the inside of each lithium-ion power plant where the battery charging time is shorter and the operating voltage is slightly lower than the battery charging time, but explosion accidents rarely occur. Therefore, the explosion caused by the short circuit is mainly due to overcharging. Because the electrode is filled with fibrous lithium metal crystals, penetration points can be seen everywhere, causing micro-short circuit faults. Therefore, the battery temperature will gradually increase, eventually producing lithium-ion battery electrolyte vapor. In this case, whether the temperature is too high to cause the raw materials to ignite and explode, or the chassis cracks first, allowing gas and lithium metal materials to enter and cause violent oxidation, the explosion will end.

　　However, explosions caused by internal short-circuit faults caused by overcharging do not necessarily occur when the battery is being charged. When the battery temperature is not high enough for the raw materials to ignite, the existing gases may not be able to support the cracking of the battery case, and the customer will stop charging and take out the phone. At this time, many micro-short-circuit faults generate heat and gradually reduce the battery temperature before exploding after a period of time. Customers described each other as finding their phones hot when they picked them up and then exploding when they threw them away.

　　This type of explosion exceeds synthesis. We can focus on preventing overcharging, avoiding external short circuits, and improving the safety factor of lithium ions. Overcharging avoidance and external short-circuit fault avoidance belong to the safety protection of electronic devices and are related to the design of battery control systems and 18650 battery 3.7v 2000mah packs. The key to improving the safety factor of lithium-ion power supplies is the safety protection of organic chemical and mechanical equipment.

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