Recently, the market of Power Bank has received many important benefits, and the market has grown strongly, becoming the first category to recover and break through many 3C accessories.At present, the new national standard of Charging Treasure has been implemented, the global tourism market has recovered, the iPhone has switched to the USB-C port, and other hot spots have been frequent. In addition, the energy density and discharge rate of the battery cell have also made breakthroughs. The integration of the chip of Charging Treasure has reached a new high, and the power of Charging Treasure has increased from 10W to 240W, a sharp increase of 24 times, which can be called a performance boom.
The 2023 USB-C high-power charging bank technology seminar held by the charging head network has been broadcast live on the public account of the charging head network and the Bilibili platform on September 15.This time, the charging head network invited dozens of professionals from well-known enterprises in the rechargeable treasure industry to answer questions, discuss and share the latest market trends and dry goods.Promote the development of charging technology, improve user experience and promote the progress of the industry.amongApress(Wuxi) Co., Ltd. (hereinafter referred to as:Apress)Invited to attend, brought the wonderful speech of "High Power Power Charging Bank Battery Cell Solution", sharedApressDevelopment history and information of some cell productsApressDeveloped a series of excellent cell and cell solutions.
The guest of this speech isApressMr. Li Bo, Director of Sales Department I of (Wuxi) Co., Ltd.
Mr. Li Bo has more than 10 years of experience in the lithium battery industry. He is currently responsible for the development and sales of the South China market of Apress (Wuxi) Co., Ltd., and has deeply participated in Huawei, Xiaomi, OPPO, VIVOThe development and implementation of projects such as Little Genius, Anke Innovation and Meituan have experienced changes in the demand for mobile phone and accessory batteries from the era of functional phones to the era of smart phones. This meeting will bring you lighter, smaller and more powerful battery solutions based on industry changes and our own experience.
The technology of Apress comes from Stanford University in the United States. The goal is to create the carp battery with the highest energy density in the world.
The organizational structure of Apress is led by two professors.They are Professor Cui Yi and Professor Zhu Diwen.Professor Cui Yi is a professor of Stanford University in the United States, a member of the National Academy of Sciences and a scientist of nanomaterials in the United States, who invented the silicon nanowire negative potassium battery.Professor Chu Diwen is a former U.S. Secretary of Energy, Nobel Prize winner, foreign academician of the Chinese Academy of Sciences, and professor of physics at Stanford University.
There are three main parts under the organizational structure, namely AMPRIUS TECHNOLOGIES, which was listed on September 15, 2022, and is mainly responsible for the research, development and manufacturing of silicon nanowire cathode materials and carp batteries;APEX (Wuxi) Co. Ltd is responsible for the R&D and manufacturing of high-density and high-power batteries. It has provincial engineering R&D centers and municipal science and technology R&D institutions.BERZELIUS (Hefei) Celis (Hefei) is a company responsible for the R&D and manufacturing of silicon anode materials and mass production of anode materials. It is the first large pure anode production base in the world.
The automatic production line on the right side of the $200 million Wuxi factory invested by Apress is a fully automatic production line of mobile phone cells sinking into the fully automatic production line of rechargeable treasure cells, so that employees' hands will not touch the aluminum plastic film during the production process, which can maximize the safety and quality of the cells.
The above is the automation equipment of Apress intelligent manufacturing, which has an advanced level of automation in the industry.Welcome all battery cell enthusiasts to visit the Wuxi factory of Amperex to exchange and discuss automatic production technology and lithium battery cell manufacturing.
The traditional lithium battery uses graphite as the anode. Graphite is two-dimensional lithium insertion and delithiation, so the energy density is limited. At present, it can achieve 680Wh/L, 250Wh/Kg.In the middle is the first generation silicon carbon anode of Aplys, which is embedded in lithium and delithiated in three dimensions. Silicon is stuffed in graphite like egg yolk. At present, it can reach 750Wh/L, 300Wh/kg.On the right is the second generation silicon oxide anode of Aplys, which is three-dimensional lithium-ion and delithiation, similar to the honeycomb appearance, doped with silicon, and has higher energy density and weight density than the first generation silicon carbon anode, reaching 840Wh/L, 380Wh/kg. At present, it has achieved mass production on UAV products, and is suitable for high power density products such as electric tools and power packs.
High density and high power silicon negative electrode battery technology system.On the basis of silicon anode, Apress has developed a high-density and high-power electrochemical system.Assist energy storage manufacturers to produce more excellent products.
At the same time, Apress has a closed-loop R&D and design capability from nano silicon to silicon anode materials to cell, especially in the dimensions of lithium rich cathode, electrolyte, silicon based material coating, pre charging process, cell system design, etc., it has a unique production formula and rich R&D and manufacturing experience.On the premise of continuously improving the cycle, expansion, high and low temperature performance of the silicon negative electrode potassium battery, maximize the high energy and high power potential of the silicon negative electrode.
High density and high power silicon negative electrode battery technology system.It is also the 10000mah 20W scheme. The traditional core volume is 11 * 63 * 115mm. The silicon technology scheme of Apress can reduce the core volume to 7.5 * 63 * 115mm, reducing the height by nearly 1/3, effectively improving the power density of the core and improving the portability of the product.
The above is a solution of 20000mah 30W. It is recommended that two such cells be connected in series for power bank with 30W or more to reduce the burning of the cells and ensure their good temperature rise performance.
With the 5000mah 1S1P 20W magnetic suction scheme of Apress, the thickness of 5.4 * 60 * 78mm is 12mm through the ternary lithium battery cell. Compared with the traditional power pack, the thickness is reduced by 2.2mm, and mass production has been realized.
In the same principle, two 54 * 60 * 78mm batteries can be connected in series to create a 10000mah 2S1P 30W magnetic suction scheme.If the scheme of Apress is adopted to design the power pack, it can effectively reduce the size of the power pack, improve the power density, and bring excellent temperature rise performance.
The following products are developed for the Qi 2.0 standard and the UFCS protocol.How can lithium batteries change to meet the market demand.
Traditional lithium batteries use very long lugs and plates.The central ear placement scheme of Apress is to place the ear in the middle of the electrode piece, reduce the time for electrons to pass through the channel to the ear, and use two electrode pieces in series to effectively reduce the internal resistance. The discharge rate can be amplified through the central ear placement.The figure on the right is a scheme provided to customers, which has been delivered in mass production, and the discharge rate has reached 1.5C.
The 6.7 * 60 * 76mm 5000mah scheme built with this scheme can achieve 18w charge/20w discharge for a single cell and 36w charge/40w discharge for a double cell.8.8 * 55 * 75mm 6000mah scheme, 21.6w charge/24w discharge can be achieved for single cell, and 43.2w charge/48w discharge can be achieved for double cell.The length of the magnetic power pack is set to 75/76mm for greater compatibility.
The slot point of the magnetic charging treasure is mainly that the magnetic charging treasure generates a lot of heat when it is working, which brings users a very bad charging experience.The right figure is the working principle diagram of the magnetic suction. The temperature rise reduction scheme of Apress is to adopt the double core series connection scheme in the middle of the pole ear, which can effectively reduce the temperature rise.
Among the products with temperature rise reduction plans, Apress also has plans to meet the needs of light and thin products.For example, for the 7.0 * 43 * 58mm 2600mah single cell scheme, the double cell series connection can achieve 5200mah, 18w charging/21.6w discharging;4.7 * 60 * 79mm 3200mah single cell scheme, double cell series connection can achieve 6400mah, 11.2w charge/34.5w discharge, and the products using this cell can also support different mobile phone manufacturers to customize the charging protocol within 33W.Manufacturers and users who meet the needs of thinner and lighter products have saved more material costs and made products more competitive compared with 10000mah products.
Schemes related to PD 3.1 agreement.
First, upgrade the materials, add the second generation silicon oxide technology, improve the energy density by 25%, and carry out technological innovation in the process of multipole ears.The traditional cylindrical point out uses a single pole lug and a pole piece, which has a long electronic path and a large internal resistance.In the multi pole ear winding structure of Apress, one pole ear is added every other distance on the pole piece, so the electronic path is short, the internal resistance is reduced, and the discharge rate is improved.The lower left corner is the live shot of the electric core of the winding structure of the multipole ear, which has the advantage of reducing the internal resistance by 60% - 80% compared with the unipolar ear;Suitable for high rate charge and discharge, with charge and discharge rate>2C;80% can be charged within 10-30 minutes;Low charge discharge temperature rise, high energy density and long cycle life.
The single cell solution with a nominal capacity of 4000 mah has been mass produced and shipped, and has been applied to some products.The actual capacity of the product is 3800mah, the volume is 8.8 * 46 * 69.5mm, the weight is 55 ± 1g, the capacity density is 263Wh/kg, the internal resistance is ≤ 8m Ω, the number of cycles of the cell is more than 500, and it can withstand 19W charge and 82W discharge.Compared with the ordinary 75g battery cell, Apress has more advantages over the conventional charging and discharging power. You are welcome to discuss the development of high-power mini power packs.
The above is the data from the customer feedback test. The H884669CL cell is mainly compared to the 40T cell from a friend. The H884669CL cell weighs 55g, the energy density is 263.3W/kg, and the ambient temperature is 35 °. During the temperature rise test, the 16A discharge test can last for 18 minutes, and the maximum temperature measured is 57 °;In the temperature rise test with the weight of 70g, the energy density of 205.7W/kg and the ambient temperature of 35 °, the 40T battery cell of the friend company can be discharged for 16A for 10 minutes, and the maximum temperature measured is 70 °.In contrast, the advantages of the Apress H884669CL cell are light weight, excellent temperature rise performance, high energy density and longer discharge duration.
On the left is the general 140W power bank scheme, which is composed of six 21700 battery cells stacked and a PCBA.On the right is the cell solution of Apress, which only requires three cells and a PCBA to form a 130W power bank solution. At present, customers have mass produced the solution, and the feasibility of the solution is no problem.The three cell solution of Apress is far ahead in terms of cost and volume.
These are some partners of Apress.
The automatic line of Apress was first used to produce mobile phone batteries. With the high integration of the mobile phone industry, the capacity of Apress could not keep up with the demand of Huami OV, so it turned its attention to the rapidly developing high-power fast charging power pack industry and sank the automatic line cell production line into the field of power pack cells.At first, Anker supplied shared power packs and consumer products, and then gradually began to expand the market, becoming the cell supplier of Monster, Lvlian, Xiaomi, ViVO, OPPO, Beisi, Romans and other power packs.
The above is the wonderful speech of the High Power Power Bank Cell Solution of Apress (Wuxi) Co., Ltd. If you want to ask for more information or have cooperation intention, you can scan the code for communication.
Summary of charging head network
The power bank is a portable energy storage device. The user's requirements are usually fast charging, high power, high energy density, and no burning.As a portable mobile power supply, the core of the product is the battery cell, and the performance of the battery cell will affect the performance of the data of the battery pack.The full automatic production line of mobile phone cell is changed into the full automatic production line of rechargeable treasure cell, which can ensure the stable shipment and quality of cell.It uses a 130W power bank consisting of three power cells and a PCBA, which can facilitate the portability of users when they travel and meet the rapid power supply needs of users.
Amperex has the R&D and design capability of closed-loop from nano silicon to silicon anode material to cell. The first generation of silicon carbon anode and the second generation of silicon oxygen anode are both high-densityultrathin batteryAt present, it has realized mass production on UAV products, and is suitable for high power density products such as electric tools and power bank.Amperesianultrathin batteryThe scheme of two electric cores connected in series can reduce the burning of the electric core and ensure its good temperature rise performance. The scheme of putting the electrode ear in the middle can reduce the time of electrons passing through the channel to the electrode ear, effectively reduce the internal resistance and temperature rise, and improve the discharge rate.Meet the needs of the manufacturer of the power bank for temperature rise, power density and charge/discharge ratio, and help the manufacturer of the power bank to design more and better power bank products.