What is your understanding of the iPhone 8 battery expansion?

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

Since IPHONE8 listed for more than a month, the number of accidents that have occurred due to battery happens, resulting in accidents of screen and fuselage. In view of the event of Samsung Note7 explosion last year, the safety of the battery especially allows consumers to pay attention, and as a benchmark in the mobile phone industry, this year's iPhone8PLUS battery bulge incident is still fermentation, if subsequent iPhone8 series mobile phone continues to happen to large-scale Accident, will cause catastrophic consequences for Apple. So in the case of the phone, will battery drums? The battery drum is nothing more than chemical and electrochemical reactions, which can be protected from the inner block inside.

From the trigger factors, it can be divided into external causes and internal causes, and the external causes include battery overgemic, over-discharge, short circuit, extrusion collision, storage Environment, etc .;. 1 Incorrect charge and discharge caused battery over charge or over.

After the battery is charged, it will be charged if the battery is charged. During the battery discharge, the discharge is still continued when the discharge voltage reaches the battery discharge, referred to as over discharge. Overcharge or overlapping will destroy the internal structure of the cell, resulting in severe polarization of the pole, and decomposing the SEI film, an electrolyte, etc.

and the gas. When the lithium ion battery occurs, excess lithium ions are released from the positive electrode active substance, and the positive electrode crystal structure is destroyed, and the oxygen is very likely to occur, and the lithium metal is deposited in the surface of the carbon negative electrode material, forming a lithium metal dendritic crystal. This dendritic crystal is easy to pierce the electrical membrane, causing internal micro-short circuits, there is a large amount of thermal energy, which has urged more internal chemical reactions, resulting in bulging, and even fire explosions.

2 inappropriate storage or use environments. The lithium ion battery relysses the electrochemical reaction of the internal compound to convert chemical energy into electrical energy, and the chemical reaction will be affected by temperature, the degree of side reactivity and the reaction product are related to the temperature. When the battery is stored or used in a high temperature environment, the SEI film inside the battery is decomposed because of the high temperature, and the decomposition will chemically react with the positive electrode and the negative electrode.

In particular, when the battery is over the recommended temperature range, the battery machine active material will release a large number of lithium ions. When the lithium ion is released, the stability of the crystal structure will destroy the stability of the crystal structure, and the safety of the battery is reduced. 3 Mechanical abuse of battery.

The impact or extrusion is a typical method of mechanical triggering heat loss, which may cause damage to the battery structure and protective plate function. It causes internal or external short circuits in the battery. The battery mechanical damage generally occurs in a short period of time, and the battery structure is mechanically destroyed, which causes thermal out of control.

If the battery protective plate function is damaged, the battery is more likely to be over-filled in the case of no protection. 4 Battery Factory has production process. If the core is mixed into dust particles inside the battery cell, it is too large, wound is uneven, and the uneven coating is uneven will result in a lithium-ion battery itself, which is a safe hidden danger for lithium ion batteries.

This quality problem may cause internal micro short circuits, and the internal micro-short process of the battery may be slow, we will not be able to evaluate the battery when the battery will occur. 5 Battery core design defects, including negative pole capacity exert, in order to reduce battery volume, the diaphragm is used, the septum margin design is not completely isolated, the positive and negative pole, the ear is not designed, the insulating tape, etc. The battery design is not necessarily detected in the previous period, and the battery is induced by various external factors, due to various external factors such as mobile phone structure, there is a variety of external factors induced by mobile phone structural extrusion.

Deposition, internal micro short circuit, etc., will cause battery drums, even fire explosions. At present, the basic mobile phone battery is designed with basic protection functions such as overcharge, overlapping, short circuit, and this type of protection function is generally difficult, so the mobile phone is used in normal and reasonable cases.

, Fire or explosion. However, many manufacturers are pursuing surface screens, more features, higher performance and lighter mobile phone design, while improving battery capacity, constantly squeezing battery space, causing battery design defects to have a very important safety hazard, slightly Inadvertently can cause safety accidents such as battery burning explosion. In summary, the battery drum is very dangerous and unstable.

If it is the development of this situation, it is easy to cause the battery thermal out of control, and the battery is broken, the electrolyte overflows, and the heavy fire, explosion. If the user encounters a drum in the mobile phone battery, the mobile phone should be stopped immediately, and contact the mobile phone after-sales department repair replacement. How tips prevents battery drums: 1, try to use the original charger to charge, do not use non-original charger.

2, don't let your phone continue to connect to charger charging. 3. Prevent mobile phones in extreme environments.

Make sure your phone or battery is charged and used under the appropriate temperature environment, do not store your mobile phone in a sun direct environment, hot car, etc. 4. If you find a battery drum or other fault, you should replace it in time.

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