New technology makes lithium batteries more resistant to high temperatures and safety is improved

Recently, Huawei’s Academia Sinica Watt Laboratory announced at the 57th Japan Battery Conference that it has achieved a major research breakthrough in the field of lithium-ion batteries and launched the industry’s first high-temperature-resistant and long-life graphene-based lithium-ion battery. Experimental results show that the new high-temperature resistant technology based on graphene can increase the upper limit of the use temperature of lithium-ion batteries by 10°C, and the service life is twice that of ordinary lithium-ion batteries. According to the industry, one of the biggest dilemmas in smartphones is the poor battery life of mobile phones. Once graphene-based lithium-ion batteries are used in combination with fast charging technology, the “short-lived” phenomenon of smartphone batteries is expected to be resolved. At the same time, new technologies allow Lithium batteries are more resistant to high temperatures and their safety is improved.

Guangzhou Daily reporter Duan Chenqun

Recently, Huawei’s Academia Sinica Watt Laboratory was at the 57th Japan Battery Conference Announced that a major research breakthrough has been achieved in the field of lithium-ion batteries, and the industry’s first high-temperature-resistant and long-life graphene-based lithium-ion battery has been launched.

Breakthroughs mainly come from three aspects

According to Dr. Li Yangxing, Chief Scientist of Huawei Watt Laboratory, the graphene-based high-temperature lithium Ion battery technology breakthroughs mainly come from three aspects: adding special additives to the electrolyte to remove traces of water and avoiding high temperature decomposition of the electrolyte; using modified large single crystal ternary materials for the positive electrode of the battery to improve the thermal stability of the material; At the same time, the use of a new material, graphene, can achieve efficient heat dissipation between the lithium-ion battery and the environment.

Dr. Li Yangxing said, “Charge and discharge tests in a high-temperature environment show that the graphene-based high-temperature lithium-ion battery has a lower temperature rise than ordinary lithium-ion batteries under the same operating parameters. 5°C; 60°C high temperature cycle for 2000 times, the capacity retention rate still exceeds 70%; 60°C high temperature storage for 200 days, the capacity loss is less than 13%'. It is reported that this research result will bring innovation to the energy storage business of communication base stations. The working life of the external base station using this high-temperature lithium-ion battery in hot areas can reach more than 4 years. Graphene-based lithium-ion batteries will also help electric vehicles last for a long time in high-temperature environments, as well as the safe flight of UAVs under high-temperature heating.

It is understood that the current 'lithium battery' is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Some insiders believe that Huawei's graphene-based lithium-ion battery is still a lithium-ion battery.

Mobile phone battery lasts longer

And Huawei Watt Lab announced at the 56th Japan Battery Conference last year The fast charging technology that can fully charge 48% of the 3000mAh battery in 5 minutes has attracted widespread attention from the lithium battery and mobile phone industries. According to Dr. Li Yangxing, Huawei’s fast-charge batteries are already commercially available and will officially release a super-fast-charge mobile phone at the end of December this year. This mobile phone uses the super-fast-charge technology released by Huawei’s Academia Sinica Watt Laboratory last year.

As for Huawei’s launch of the industry’s first high-temperature-resistant and long-life graphene-based lithium-ion battery, the industry believes that if the battery is combined with fast charging technology, it will greatly improve The battery life of smartphones completely satisfies many mobile phone users who can keep their phones charged for a long time after using a variety of applications. At the same time, because Huawei's new technology makes lithium batteries more suitable for high-temperature environments, lithium batteries used in technology products such as mobile phones and notebook computers are more 'high-temperature resistant' and their safety is improved.

Related links: Lithium batteries have caused trouble for many times.

It is understood that there are many problems with smartphone batteries at present, because the mainstream is now The fast charging technology is generally realized by increasing the voltage, which can easily cause the battery to overheat and bring hidden dangers to the charging safety of electrical appliances including mobile phones and notebook computers. Many well-known mobile phone manufacturers and notebook manufacturers have recalled because of battery problems.

In April 2016, Toshiba Japan announced a global recall of 100,000 notebook computer products. The reason for the recall was a battery problem. Toshiba said that laptop batteries within the scope of the recall have a hidden danger of overheating, and four reports of battery overheating and melting have occurred.

In June this year, Hewlett-Packard Technology (Beijing) filed a recall plan with the General Administration of Quality Supervision, Inspection and Quarantine, and recalled some HP notebook batteries produced from March 2013 to May 2014 Group, the number of battery packs affected in mainland China is 6,726; in September this year, Samsung’s Note7 caused a burning incident due to battery overheating, which led to Samsung’s global recall of the 2.5 million Samsung Galaxy Note7 that was sold. Some analysts believe that when lithium batteries are damaged by external forces such as internal short-circuits and excessive temperature, they are easy to catch fire and explode in an instant.