Power cell technology level

Official figures show that the Ningde energy density of time square shell battery has reached 240 wh/kg at present. Technology planning is to raise its energy density batteries to 300 wh/kg before 2020.

Through the positive + 811 three yuan silicon/carbon composite anode to improve the energy density at the same time, cycle, high temperature performance, cost, security, and so on all want to sacrifice, also relatively strict production technology and environmental requirements. People familiar with the matter to the first electric network, according to the 2017 era of Ningde bulk supply side shell batteries energy density between 190 ~ 210 wh/kg, 2018 is likely to rise to 210 ~ 230 wh/kg.

In early 2017, Ningde times opened "a new generation lithium ion power battery research and development of industrial technology development "project, high nickel ternary material for the anode, silicon carbon composites as anode of lithium ion power battery. In 2017, the total output of Ningde era to 17.09 GWH and has just released a new version of the prospectus shows that when the west lake lithium ion power battery production base project of postpartum, Ningde age 24 GWH will new capacity, capacity will reach 41.09 GWH.

At present, the BYD insiders revealed that BYD large-scale production of batteries energy density of 220 wh/kg, the target is to achieve 300 wh/kg before 2020.Today, byd total power battery communist for 16 GWH, among them lithium iron phosphate batteries7, and 9 GWH ternary lithium battery GWH.

Internationally, the shell battery is main products Samsung SDI. In 2017, Samsung SDI co., LTD vice President Zheng Shixiong said publicly, Samsung SDI power battery energy density current of 250 wh/kg, and is expected to reach 350 wh/kg in 2023. Maybe in 2017, Samsung really has achieved 250 wh/kg side shell mass production of batteries, but according to the test using NCA ternary cathode material.

Many side shell battery types, according to customer's requirement, can in the capacity of battery enterprises, such as shape and size for customized. Considering the difference of anode materials are formula, so the same specification between the side shell of batteries energy density is more comparable. In the leading enterprises in the domestic and foreign shell power battery energy density batteries on the gap may be small, perhaps from the point of view of the technical conditions, China may not be far behind.

New equipment, Rhett Feng automation division established, independent research and development of automation equipment, power capacity efficiency, at the same time also and automation equipment development and production line.

On the new structure, Rhett Feng has completed preliminary validation and extremely low cost column experimental work, complete structure design, sample production, low cost and high capacity complete aluminum shell R Angle weight loss support structure design and production; There are new RDF explosion-proof valve structure, flip chip structure, sample and so on.

On the new process of exploration, Rhett abundant technology developed on the top sheet was no waste, material utilization from 40% to 40%;Through the new welding technology, laser welding of copper, aluminum, copper, aluminum resistance welding, metal plastic welding, electromagnetic pulse welding, molecular diffusion welding preliminary research and application; For aluminum scrap process validation and experiment; In addition, the top piece weight loss plan there have also been completed.

On the new material import, Rhett abundant complete each feature a variety of new materials, composite materials, conductive materials) authentication, at present, its patents, a total of 156 projects.

Wang four said, while maintaining close cooperation with downstream customers at the same time, Rhett Feng was prospectively type of product, product technology, product performance, quality control, etc. Carry out the dominant start study. In the future, Rhett Feng does power battery structure overall solutions provider, to provide customers with the overall structure of packaging services.

Refers to a single electrochemical batteries contain positive and negative, are generally not used directly. Different from battery protection circuit and shell, can be used directly.

The composition of lithium ion secondary battery charge is this: batteries + protection circuit board. Rechargeable batteries remove protection circuit board is the batteries. He is battery part of rechargeable batteries. The quality of the batteries directly determines the quality of rechargeable batteries.

Mobile phone panels removed the shell, and then remove the panels in the protection of the circuit board is the lithium batteries.

Batteries are divided into aluminum shell batteries, batteries, soft packages (also called "polymer batteries") and cylindrical batteries. Usually phone batteries used for aluminium shell, batteries, bluetooth and other digital products with soft packages batteries, laptop battery series parallel combination of using cylindrical batteries.

Small particle size, large specific surface area, color white, high purity, obviously improves the electrochemical performance. You can use lithium titanate battery materials and cobalt acid lithium batteries in the material.1:0.05 ~ 0.35 v (vsSCE) showed typical Faraday turns potential range capacitance behavior. So-called constraint capacitance is following the electric double layer capacitors, development get constraint capacitor. Constraint also calls the Faraday quasi capacitors, for Faraday capacitance, the stored charge includes not only the process of the electric double layer on the storage, and include ion in electrolyte in the electrode active material due to the REDOX reaction will charge storage in the electrode. The electrolyte ions, general of H and OH - in the applied electric field under the action of diffusion in the solution to the electrode/solution interface, and then through the interface of the electrochemical reaction to enter the body to the electrode surface active oxide phase; Due to the electrode material used is a larger specific surface area of the oxide, so there will be quite a few such electrochemical reactions, a large number of electric charge is stored in the electrode. Discharge when these into oxide ions can return to the electrolyte, at the same time the release of the stored charge by external circuit, which is Faraday quasi capacitor charging and discharging mechanism. Say clearly, constraint capacitance is countless small electric double layer capacitance.2: in the same current density (ma/cm2), increase the specific capacity (method/g).3: reduce self-discharge rate, has the good cycle life. Ingredients: nano titanium dioxide (XZ - TI01) appearance: white powder; PH: 6-8;Size: 10 nanometers; Specific surface area: 60-70 m2 / g; Purity: 99.9%, the drying of 105 ℃, 2 h 0.05 (%) or less; Burning weightlessness acuities were 0.1 (%);Iron PPM 3 or less qualified lead (Pb) 10 PPM or less qualified. Packing: 10 kg/drum lined with plastic film bag

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