Author ：Iflowpower – Portable Power Station Supplier
Is the lithium-ion battery pack Is there a safety hazard? Is the lithium-ion battery explosion true? Is the problem of unsafe and lithium-ion battery explosion on lithium-ion battery, it is the focus of attention. Lithium-ion battery packs are more and more widely used in the field of life, but because of the most recent Samsung Note7, iPhone battery explosion occasionally occasionally happened. So, the lithium-ion battery is unsafe? We will come to the analysis.
Lithium ion battery: "lithium ion battery" is a class of a battery having a negative electrode material using a lithium metal or lithium alloy using a nonaqueous electrolyte solution. The lithium-ion battery is important from the positive electrode, the negative electrode, the electrolyte, the diaphragm, and the external connection, and the packaging member is composed. With the development of science and technology, the lithium-ion battery pack now has become mainstream, and the market has set off "lithium electric heating" again.
Is the lithium-ion battery have a safety hazard? The safety problem of lithium-ion battery pack is not only related to the nature of the battery material, but also related to battery preparation technology and use. The mobile phone battery has frequent explosion events, on the one hand, due to the failure of the protection circuit, but more importantly, there is no fundamental solution to the material. Lithium-ion battery safety hazard comes from the following five aspects: 1 Is the safety hidden danger lithium-ion battery Explosion? With the rapid development of lithium-ion battery packs, new energy devices, while improving our lives, the problem also came, Samsung Note7, iPhone battery explosion accident still The crab island bus continuous burning incident, which triggered concerns about new energy technology.
Taking a lithium ion battery inside the mobile phone as an example, there is an important reason for the cause of lithium ion battery pack explosion: 1. External short-circuit external short circuit may cause improper operation, or misuse, due to external short circuit, battery discharge The current is very large, the heat of the battery will cause the diaphragm to shrink or completely damage the diaphragm inside the battery, resulting in an internal short circuit, and thus exploding. II.
Internal short circuit due to short-circuit phenomena internally, the electrical cell current discharges, there is a large amount of heat, burn the diaphragm, resulting in a larger short circuit, so that the battery will break the electrolyte into a gas, causing the interior When the pressure is too large, when the outer casing of the battery cannot withstand this pressure, the battery will explode. Third. When the charging is overcharged, the lithium excessive release of the positive electrode will change the structure of the positive electrode, and excessive lithium that is released is easily inserted into the negative electrode, and the negative electrode surface is easily detected, and the electrode surface is lithium, and when the voltage reaches 4.
5V When the above, the electrolyte will decompose a large amount of gas. It may cause explosion in all kinds of. IV.
The moisture content of the water can be reacted with electrolyte, producing gas, charging, can be reacted with the generated lithium to produce lithium oxide, so that the battery core is overcharged. Generating gas, the decomposition voltage of the water is low, and it is easy to decompose the generating gas when charging. When this series of generated gas increases the internal pressure of the battery, the electrical core will explode when the outer casing of the battery cannot be affected.
5. The negative electrode capacity is insufficient when the positive electrode portion is insufficient, or when there is no capacity, the portion or all of the lithium that appears when charging is not inserted into the interlayer structure of the negative electrode graphite, and the surface of the negative electrode is analyzed. When the protrusion "dendrites" is formed, when the next time is charged, the protrusions are more likely to cause precipitation of lithium.
After dozens to hundreds of cycles, "dendrites" will grow up, and finally thorns the diaphragm paper. , Short-circuited inside. These are the causes of lithium-ion battery pack explosions, which affects the safety problems of lithium-ion batteries.
We cannot kill a group of people, or to consider, try to reduce external factors that cause lithium battery problems. I hope about the company's improvement technology and testing capabilities. Users must pay attention during use.
How to reduce the safety hazard of the lithium ion battery pack? 1 Here you can say that you can say that you can say that the lithium-ion battery pack of home is safe and reliable, and our lithium-ion battery is used with UPS. It is not used to apply lithium-ion batteries on mobile phones and cars, engage in lithium-ion battery UPS. The power industry has been a rich professional related experience.
It is deeply affected by the Qi Zi-II battery to match the application of the UPS industry and the status quo and characteristics of the lithium-ion battery. The development trend of the industry, insists on safe, efficient, energy saving, green, design R & D concept, supply safe, stable, efficient lithium battery and solution for users users. Advantages and safety of lithium iron phosphate ion battery packs: 1, energy density: under the same volume, the energy density of the lithium-ion battery is 3 to 4 times the lead-acid battery, the lithium ion battery is smaller, weight lighter.
2, long life: the cycle life of the lead-acid battery is around 300 times, while the lithium phosphate ion battery is longer under the same conditions. 3, high-magnification discharge: the discharge rate can still reach 90%. 4, fast charging: can be large current 2C to charge and discharge, and charge the battery in a special charger.
5, safe environmental protection: lithium-ion battery pack in puncture, squeezing, overcharge, short circuit experiment, not exploding, no fire. Compliance with Europe RoHS, for green environmentally friendly batteries. 6, no memory effect: lithium iron phosphate ion battery no matter what state, can be used with it, no need to put completely.
Summary: Lithium-ion battery safety hazard is definitely, but it also points to the type of lithium ion battery, like a lithium phosphate ion battery pack is safe and reliable, will not explode, no fire, green environmentally without pollution. .
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