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Home> Articles>News>A Time Bomb In Your Pocket — ​High Discharge Rate Lithium Ion Battery

A Time Bomb In Your Pocket — ​High Discharge Rate Lithium Ion Battery

From:CTECHI GROUP Limited     Release time:2018-10-08

Overview:Since the day of the invention of lithium batteries, the traditional 3A alkaline batteries and nickel-hydrogen rechargeable batteries seem destined to step down the digital altar. As a reusable energy source, lithium batteries, including lithium iron disulfide rechargeable battery are thinner in size than traditional nickel-hydrogen rechargeable batteries, and the same size of lithium batteries store far more electricity. The traditional Ni MH rechargeable battery has the characteristics of not easy to discharge and the plasticity of the battery. High discharge rate lithium ion battery provides the best power solutions for most mobile devices today, whether it's on MP3, digital cameras, mobile phones, laptops, tablets, we can't find a nickel-hydrogen rechargeable battery. But things are always two-pronged. Lithium-ion batteries bring us a lot of security risks, too. From Dell's battery explosion to Apple's battery incident, it seems that no matter how famous the manufacturer is, it is hard to escape from lithium-ion battery explosion and push himself to the question of quality public opinion. In the teeth of the storm.

Since the day of the invention of lithium batteries, the traditional 3A alkaline batteries and nickel-hydrogen rechargeable batteries seem destined to step down the digital altar. As a reusable energy source, lithium batteries, including lithium iron disulfide rechargeable battery are thinner in size than traditional nickel-hydrogen rechargeable batteries, and the same size of lithium batteries store far more electricity. The traditional Ni MH rechargeable battery has the characteristics of not easy to discharge and the plasticity of the battery. High discharge rate lithium ion battery provides the best power solutions for most mobile devices today, whether it's on MP3, digital cameras, mobile phones, laptops, tablets, we can't find a nickel-hydrogen rechargeable battery. But things are always two-pronged. Lithium-ion batteries bring us a lot of security risks, too. From Dell's battery explosion to Apple's battery incident, it seems that no matter how famous the manufacturer is, it is hard to escape from lithium-ion battery explosion and push himself to the question of quality public opinion. In the teeth of the storm.

Why does lithium battery explode? Are the lithium batteries safe? How can we prevent the explosion of lithium batteries? Today we'll look at the secrets of the small bombs on the mobile devices around you.

Although there are many factors affecting the explosion of lithium batteries, but in the final analysis is a very simple reason for short circuit, and the important reason for short circuit is our common charging overvoltage and overcurrent, and the use of long time and so on. However, the problems of lithium batteries in the manufacturing process can not be ignored, because there are defects in the manufacturing process, it is easy to leave metal dust, copper foil and aluminum foil fragments between the positive and negative electrodes. These fragments will be overheated in the battery. The electrolyte in the battery is a flammable liquid. The spark caused by the short circuit is very easy to ignite the electrolyte in the sealed environment, which will cause the combustion and explosion of the battery. There are generally three situations:

1. Sparks are produced to ignite the electrolyte, which then affects the plastic fuselage and combustibles in contact with it, resulting in spontaneous combustion.

2. Causes the temperature in the battery to rise sharply, the space in the battery is very narrow, thus causes the internal pressure to increase to cause the explosion;

3. The temperature rises slowly inside the battery, and the battery shell gradually melts, causing corrosive electrolyte to leak.

Lithium Iron Disulfide Rechargeable

Although lithium-ion batteries, such as lithium iron disulfide rechargeable battery and high discharge rate lithium ion battery, have been greatly improved since their inception to the present day, there will inevitably be omissions in advanced manufacturing processes. The safety risks posed by these small fragments can not be eliminated in the short term. Battery manufacturers are certainly well aware of this, so a well-crafted lithium-ion battery usually has three inside. 3 safety designs:

1. The original switch is used inside the battery. When the temperature inside the battery rises, the resistance value rises accordingly. When the temperature is too high, the discharge is stopped to prevent excessive discharge.

2. Choose the proper material of positive and negative separator, after the temperature rises to a certain extent, it will dissolve automatically, prevent the lithium ion from passing through and stop the internal charge-discharge reaction.

3. Set up the outlet hole of the battery, open the outlet hole automatically after the internal pressure of the battery rises to a certain degree, keep the balance of the internal pressure, prevent the battery from bursting.

Therefore, it can be seen that the lithium batteries of real quality will not occur in general use of explosive spontaneous combustion and other extreme phenomena, although the internal structure of the battery is the cause of battery explosion, but the real accomplice is the battery quality and many external factors.

Fake lithium-ion batteries are an important factor in many lithium-ion battery explosions. Regular lithium-ion batteries are manufactured with strict control over the amount and size of debris in the batteries. In general use, the probability of passing through the bipolar diaphragm is very low. At the same time, the lithium-ion batteries manufactured by the regular manufacturers are coated with resistance. Burning materials, so the quality of lithium battery in normal use is not easy to explode. The failure of manufacturers to produce fake batteries and consumers'desire to buy fake batteries cheaply can trigger an explosion.

Lithium Iron Disulfide Rechargeable

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We CTECHI Group is one of leading safe lithium manganese dioxide li-mno2 household batteries, non rechargeable lithium iron disulfide battery, lithium sulfur dioxide battery and flexible lipo battery pack manufacturers and exporter in China, we are not only focus on provide single cell but provide battery assembly and do OEM service for customers, CTECHI has captured 80 percent of overseas markets in the past 16 years with more than 2000 reliable customers in our customer management system, which has been being one of the leading enterprises with the most complete category in China's battery industry.


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