Analyze graphene battery technology from battery safety issues

Learn about battery safety issues with graphene battery technology

Recently, a piece of news was inexplicably poked: a 19-year-old man in Hefei did not find a suitable job, and he was mourned. He stole a mobile phone while surfing the Internet at the Internet cafe. He was arrested by the police, but he was also very arrested after the arrest. “Grievance”, because the stolen Samsung mobile phone has not had time to sell, it is inexplicable in his home.

Analysis of graphene battery technology from battery safety issues

There are many people talking about this. Some netizens said that this is a new type of remote self-destruction detonation device, anti-theft system, and a new trend in the future. More netizens replied: Samsung dares to steal, this thief does not read the news? Most people are praying: cherish life and stay away from Samsung.

The netizens’ reply is self-contained, but the heart is not afraid. The battery explosion involves personal safety. It is not a small problem. It can be seen that the impact of the Samsung Note7 explosion on Samsung is very large. In fact, it’s not just Samsung. The explosion of other brands’ mobile phones is innumerable. One piece is superimposed, and the safety of mobile phone batteries has been undoubtedly pushed to the forefront.

Since the technology of mobile phones is constantly being updated, why is there such a big security risk in the safety of batteries? Why does Samsung Note7 explode? The person in charge of Samsung’s mobile phone business said: The main reason for the Note7 explosion was due to using a defectivebatterycaused. Note7 with Samsung SDI lithium battery has a risk of serious heat or even explosion due to a design defect inside the battery cell. What consumers are most concerned about is what is the current battery safety? How to solve security risks? Understand the following questions, perhaps you will have a new understanding of the “fried machine”.

Analysis of graphene battery technology from battery safety issues

Battery structural defects

What is the lithium battery used in our daily mobile phones? At present, the structure of a general lithium battery is divided into a positive electrode, an electrolyte and a negative electrode, and a separator is provided between the electrolyte and the positive and negative electrodes. The occurrence of heat or burning of lithium batteries is mainly caused by short circuit and excessive current. Overheating is the most common cause of explosion of lithium ion batteries. This usually means that external factors cause thermal runaway, that is, the temperature of a certain part of the battery rises, which causes the temperature of other parts to rise. As a result, more and more heat is generated in the battery, a vicious cycle is formed, the electrolyte in the battery begins to expand, and steam appears. Eventually the battery explodes due to excessive internal pressure. Mechanical damage is another reason, simply by squeezing causing a short circuit.

As mobile phones continue to innovate, we are more demanding on the portability of mobile phones. Faster and thinner user demand, so that mobile phone manufacturers in the design of lithium-ion batteries, the outer casing and the diaphragm between the positive and negative levels are getting thinner, which poses a hidden danger for battery safety. Because once the diaphragm is damaged, it may cause a short circuit, resulting in heat generation inside the battery. The problem with the Samsung battery problem is the diaphragm. Unqualified diaphragms may cause direct contact between the anode and cathode. This is equivalent to a short circuit, followed by spontaneous combustion. The serious point is an explosion!

Analysis of graphene battery technology from battery safety issues

Are there any new battery technology for such a long time? Let’s talk about the new battery technology that is expected to be applied to mobile phones in recent years.

Super Graphene Battery

Graphene is a new term for many people, and graphene batteries are An oversized capacitor that quickly charges, stores a lot of power, and then discharges at a reasonable rate. This “battery” is not easily damaged, and can be tens of thousands of charge and discharge cycles. Founded in 2004, graphite is the thinnest material and the toughest material with a breaking strength 200 times higher than the best steel. At the same time, it has good elasticity and can reach 20% of its own size. It is the thinnest and strongest material in nature, and has many excellent physical and chemical properties.

Analysis of graphene battery technology from battery safety issues

In general, the addition of graphene composite conductive powder to lithium batteries, flowing electrons in graphene faster, through the surface of graphene, there is no The thinness of the mobile phone leads to a safety hazard of thinning the two-stage diaphragm of the battery. In addition, graphene batteries charge faster, have larger capacities, and last longer. This is expected to make the mobile phone “second rush”, electric car farewell to a few hours of charging become a reality.

The graphene materials in China are in a critical period from the laboratory to the industrialization. The research on graphene at home and abroad can be described as turbulent, and a new industry has been born. At present, Polycarbon Power, a wholly-owned subsidiary of Polycarbon Composites, has developed a commercially available graphene battery commercial product, which will be officially launched at the end of this year or early next year and will be applied to electric vehicle power for the first time. It is expected that an Apple companion mobile power supply will be listed in the first half of next year. In the second half of 2017, the graphene power supply applied to the mobile phone will be able to meet with you. At that time, the problem of mobile phone battery pain will be effectively solved.

Analysis of graphene battery technology from battery safety issues