The secret of Lishen battery

On April 19th, the reporter followed the “New Era, New Meteorology as a Network Media Reporter to the Grassroots” activity to the Tianjin Lishen Battery Co., Ltd., focusing on technological innovation, intelligent manufacturing and other fields to show the big mystery of small batteries. .

Staff introduces the development of Lishen

Tianjin Lishen Battery Co., Ltd. is a state-owned high-tech enterprise founded in 1997. It is one of the earliest lithium ion battery manufacturers in China. It mainly produces lithium-ion batteries, including five series of square, cylindrical, polymer, power, super capacitors, and thousands of models. Products are mainly used in consumer electronics, new energy vehicles and energy storage.

Battery use in the field of consumer electronics

“This is a square lithium-ion battery. The small box outside is an aluminum shell. It is used in the earliest mobile phone brands, such as Motorola and Huawei. The following is a polymer lithium-ion battery, which is inside the aluminum battery. The batteries are the same, but the packaging is different.” Gao Junkui, executive vice president of Tianjin Lishen Battery Co., Ltd., said that because of the thinner and lighter requirements of polymer lithium-ion batteries, most mobile phones and laptops are currently used. It is a polymer lithium ion battery.

Lishen battery professional mobile phone battery for various mobile phone brands

Gao Junkui introduced a model of the 1860 lithium-ion battery. The small battery with a diameter of 18 mm and a height of 65 mm is the power source for the million-star luxury Tesla. "The 7000-section cylindrical battery is driven by Tesla in different forms of series and parallel."

1860 column type lithium ion battery

Subsequently, the reporter came to the production workshop of Lishen Company and saw that the two production lines were running. Walking through the clean visit corridor, through the bright glass windows, the automated, intelligent and large-scale production mode is carried out in an orderly manner. According to Liu Yuan, an engineer at Lishen power battery System Co., Ltd., after a series of laser cutting, winding, assembly, liquid injection, cleaning and packaging processes, the battery was produced.

Staff observation data and winding degree before winding machine

“The winder in front of the machine is smarter. Its winding speed is 15% higher than that of the previous generation, and the output is doubled. It can realize automatic roll change, automatic monitoring, automatic correction, and can realize two people operating 4 equipments in the latter stage." Liu Yuan said.

In addition to the winder, Lishen developed the “Twin-screw extrusion method” on the slurry preparation system together with foreign advanced companies, becoming the first company in the world to successfully apply this technology. In addition, it has wide-width double-sided high-speed coating equipment, the production capacity is four times that of the mainstream equipment in the industry, and its chemical conversion equipment also uses automatic stacking production equipment, the space utilization rate is increased by 300%, and the electricity recovery is 60%, which is greatly reduced energy consumption.

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Semi-finished products are transported on the conveyor belt to the next operation

According to Gao Junkui, Lishen Battery has a market share of 10%-15% in the field of consumer electronics. In recent years, with the vigorous development of the power battery industry, Lishen has been in Tianjin, Suzhou, Qingdao, Wuhan, Mianyang and Shiyan. The establishment of production bases in other places, the annual production capacity of lithium-ion batteries has reached 10 billion watt-hours and Gao Junkui said that this is equivalent to the power source of 200,000 new energy vehicles. In the future, Lishen will follow the development strategy of “small battery base, power battery development, special commercial vehicle start, and passenger car take-off”, striving to achieve the top three market share of high-end consumer electronics battery customers worldwide. It is estimated that by 2020, the company's annual production capacity will reach 30 billion watt-hours / year, and in 2025, the annual production capacity will reach 60 billion watt-hours / year.

The reporter learned that based on the battery of Lishen, Tianjin High-tech Zone has gathered battery research and development enterprises such as Lishen Battery and Hengdian Company, and battery materials enterprises such as Bamo Technology, Hui'anhui, and Blue Sky Sun, and Guoneng New Energy. Battery applications companies such as automobiles and Aikangnik have formed a complete industrial chain from battery materials and battery research and development to battery applications.

Visitors stop in front of the pure electric passenger car battery system

In addition, relying on relatively complete battery industry ecology, Tianjin High-tech Zone continues to attract high-end research institutes at home and abroad, and continues to encourage enterprises to increase investment in research and development, and actively set up research and technology carriers such as enterprise technology centers and engineering technology centers. At present, 22 high-level innovation platforms such as scientific research institutes, R&D centers, engineering centers, and national key laboratories represented by the 18th Institute of CLP have been gathered, and a cooperation agreement with the National Graphene Research Institute has been signed. The Graphene Engineering Technology Center is located in the High-tech Zone.

The page contains the contents of the machine translation.