The first thing that Huawei thinks about is the mobile phone, perhaps the communication device. Maybe many readers use Huawei mobile phones in their hands, but few people know that Huawei still has many patents related to lithium-ion batteries. It is a veritable lithium battery. The first thing that made everyone familiar with Huawei's lithium-ion battery research and development capabilities was a report on Huawei's development of graphene batteries. Although it turned out that this was only a misinterpretation of the media, Huawei only enhanced heat dissipation through graphene, which improved the high temperature of lithium-ion batteries. The next cycle, but this also shows that Huawei's research and development capabilities in lithium-ion battery technology do not even lose some professional lithium-ion battery manufacturers. In June this year we reported that Huawei Academia Sinica and the United States Argonne National Laboratory passed La and Al doping, LiCoO 2The stable voltage of the material is increased to 4.5V, which makes the reversible capacity of the LCO material reach 190mAh/g or more, and improves the stability of the LCO material at high voltage. After 50 cycles, the reversible capacity is still as high as 96%, which greatly enhances lithium. The energy density of the ion battery ("100 billion research funding will not be white! Huawei, Argonne National Laboratory jointly developed a new high-pressure lithium cobalt oxide material, reversible capacity of 190mAh / g!"). We know that the theoretical capacity of LCO materials can reach 270 mAh/g, but due to the unstable structure of the material at high voltage, the phase transformation occurring inside the material (O3 is converted to the H1-3 phase) causes severe mechanical stress inside the material particles, causing cracks inside the particles, and Along with the decrease of Li+ diffusion coefficient, the reversible capacity of LCO circulating at high voltage is rapidly declining, and Huawei solves this problem well by element doping. For the development of high energy density mobile phone lithium ion battery, upgrade mobile phone Life time is of great significance. From here, we can also see Huawei's strength in lithium-ion battery research.
The strength of Huawei is not only reflected in the publication of papers, but also in the patents related to lithium-ion batteries held by it. According to the incomplete statistics of Xiaobian, since 2011, Huawei and its subsidiaries have applied for lithium-ion battery related technologies. The number of patents reached 92, of which the number of patent applications reached 41 in 2012, accounting for 44.56% of the total number of patents. In 2013 and 2016, Huawei also applied for a large number of lithium-ion batteries, reaching 22 and 14 respectively.
From the classification of patents, 'positive and negative materials', 'electrode preparation method', 'electrolyte' occupied the absolute main position, the number reached 35, 18 and 14 respectively, accounting for 35.39%, 18.2% and 14.16%, in addition to the number of patents, including diaphragms, current collectors and all solid-state batteries, the number reached 3, 4 and 5 respectively, the total proportion of the three reached 13.5%, from the perspective of Huawei's patent structure, its research direction is even more Research on raw materials, such as the development of positive and negative materials, the development of high performance electrolytes, etc.
At the same time, we can also see that Huawei has layouts for new technologies such as all-solid-state lithium-ion batteries, lithium-metal batteries and lithium-air batteries, especially in the case of all-solid-state batteries, which account for 5.6% of all patents. However, it should also be noted that most of these patents were filed in 2012 and 2013, which also indicates that Huawei has made relatively little progress in these areas in recent years.
Among the patents for positive and negative materials held by Huawei, the patents related to negative electrode materials accounted for an absolute large number, reaching 26, of which 23 were composite graphite anode materials and ratio type anode materials, and the other 3 were silicon carbon. Negative electrode material. Here we also noticed an interesting detail. Three of the 26 negative electrode material patents were jointly applied by Huawei Technologies Co., Ltd. and Shanghai Shanshan Technology Co., Ltd., respectively, as a high-rate lithium-ion battery. "Modification method of anode material", "Preparation method of high-rate performance lithium ion battery anode material" and "A composite anode material and secondary battery", Shanghai Shanshan Company is the leading lithium-ion battery material research and development in China And the production company, its cooperation with Huawei company to apply for relevant patents also indicates its recognition of Huawei's technical level.
In the research and development of cathode materials, Huawei holds a total of 9 patents for cathode materials, of which 5 are related to the development of lithium-rich solid solution materials, 2 patents for lithium cobalt oxide materials, 1 patent for ternary materials and a coating for positive electrodes. Class patents, but it should be noted that although Huawei has more patents for lithium-rich materials, most of them are applied for applications around 2012. There is only one patent for high-voltage lithium-rich materials ("high-voltage lithium battery cathode materials, batteries and systems". Law and Application") Co-applied with Guizhou Zhenhua New Materials Co., Ltd. in 2016, and both patents for lithium cobalt oxide materials are applied for 2016, 2017. This shows that Huawei is optimistic about high-capacity lithium-rich materials in the early stage, but after After many years of research, due to the problems of lithium-rich materials, the research focus has gradually shifted to lithium cobalt oxide materials. From the distribution of cathode material patents, Huawei's research on lithium-ion battery technology mainly serves 3C electronic products, and Not for the power battery market.
As a world-class enterprise driven by innovation, Huawei has invested far more in research and development than many domestic companies. The long-term investment in research and development has enabled Huawei to achieve gratifying achievements in many fields, not only the Kirin processor, but also Recently released the series of AI chips, in the research and development of lithium-ion battery related technology, after years of hard work, Huawei has mastered a large number of advanced technologies, such as the recently reported lithium-ion battery technology developed by Huawei with super fast charging capability. It is the best embodiment. Huawei's success also proves that a company can only be invincible in the fierce market competition if it pays attention to technology and respects technology.
