How do companies respond to energy density and security?

Technological innovation is the basic premise for the survival and development of enterprises. Under the background of the rapid development of downstream applications, it has become an inevitable choice for battery companies to enhance their ability to develop and cope with market competition.

In fact, as fuel for electronic products, technological innovations around batteries have not stopped since the day they were born. Lead acid, nickel hydrogen, lithium, solid batteries, air cells, fuel cells ...

Technology, like a business, is cold and cruel, with one product revolution and another product, one enterprise crushing another, and one era replacing another. The upgrading of battery performance and technology depends on the chase and competition between companies. If you can't make good technology reserves in advance, you will likely be inadvertently overtaken by your opponents.

Since this year, battery companies have made rapid progress in increasing energy density on the premise of fully guaranteeing safety performance. In the 2017 Senior Industrial Lithium Golden Globe Awards, High-tech organizing committee found that the 17 battery/PACK companies have very bright spots in innovative products/technologies in power batteries, digital batteries, energy storage batteries, and battery systems. See below:

1, Carne New Energy

The company's currently mass-produced NCM111 three-part soft-pack battery has an energy ratio of 170 Wh / kg, while the NCM523 three-part soft-pack battery has an energy ratio of 220 Wh / kg, and is accelerating the Advancement of a 622 system battery with an energy ratio of 250 Wh / kg.

The 36Ah-220wh/kg soft package three-component battery developed by Kannai New Energy uses NCM523 material/ceramic diaphragm and functional electrolyte, which increases the product energy ratio from 164 Wh/kg to 220 Wh/kg under the premise that the core size remains unchanged. The cycle life ≥ 2000 times, with excellent low-temperature performance and multiple performances, the safety passed the GBT 31485-2015 new national standard certification, breaking through the current common lithium-ion batteries for electric vehicles with short mileage, poor safety, and high-cost technology bottleneck.

2, Thornton New Energy

High energy density core: Capable of mass production of 230 WH/Kg ternary core and 165 WH/Kg lithium core, currently at the leading level in the industry; Fast charging core: The energy density of the 4C and 6C fast charging power core can reach 175 Wh / kg and 125 Wh / kg, respectively, which is much higher than the energy density of the Lithium titanate fast charging core in the current market. 80Wh / kg; High power core: power density 5000W/kg; Energy storage core: cycle life of more than 7,000 times, in the industry-leading level.

3, BAK battery

The company is the only company in China that can mass-produce high-nickel 811 material system ternary batteries. The energy density of power batteries has been increased to 232Wh / kg, which is in the leading position in the industry. Subsequent 300Wh / kg products are also about to be launched, leading the industry average. level. Using a high nickel 811 material system, the energy density is increased while the use of cobalt is reduced, and the cost of technological innovation is reduced.

4, Tianjin SHARES

In the strong Ternary 2017, Tianjin SHARES adjusted the specifications of its three-yuan soft package core accordingly, and the PHEV model was planned to have at least 1-2 electric core capacity specifications; The minimum number of EV models is 2, and full coverage requires 3-4 sections of core capacity specifications. The final adoption of the standard box will reduce the number of core specifications.

Based on the use of soft packet stacking technology, Tianjin SHARES launched 32Ah, 37Ah, and 45Ah three-part electric cores. At present, the single-unit energy density of its three-part soft package power battery reaches 230WH/Kg, and the energy density of the three-part system has reached 140-150 WH/KG. Successfully supporting Shaanxi Automobile Tongjia, Qirui Commercial Vehicle, and Tang Jun hot selling models

So far, Tianjin SHARES Ternary soft package power battery/group completed an annual sales volume of 213,350 units, achieving sales of more than 1 billion yuan. In the field of logistics vehicles, Tianjin shares are ranked first in the country in terms of installed capacity, and it is expected that the market share will reach 2.95 % by the end of 2017.

5, micro-macro power

The battery monomer of the third-generation MpCO battery product can reach 170Wh / Kg, an increase of 41.7 % over the previous generation; While maintaining the ability of 10-15 minutes fast filling and long life, it has more cost advantages and is in line with the market competition trend of electric passenger cars in the future; In terms of life span, MpCO products have a life of more than 7,000 times under fast charging conditions, while the life of lithium iron phosphate fast rechargeable batteries on the market has not exceeded 4,000 times.

In addition to the innovations in the material system, Micro-macro has always insisted on the use of smart heat control fluid(STL) technology in the Pack design process to ensure the safe use of lithium batteries.

6, Lion technology

The energy density of a single battery with ultra-high energy density cylindrical lithium-ion battery reaches 220 Wh / kg or more, and the high energy quantification of the 18650 battery is achieved through system solutions such as battery key materials and battery design, including:

High-nickel nickel-cobalt-manganese hydride or nickel-cobalt-lithium hydride cathode material with high specific capacity and high specific capacity artificial graphite or silicon carbon anode material; And develop the suitable high voltage electrolyte and electrolyte suitable for silicon-based negative electrode materials, through the system integration and optimization of battery materials, improve the battery energy density, and obtain a good cycle stability, improve the value of 18650 batteries;

Reducing the thickness of positive and negative polar fluids; The problem of battery safety is solved by coating type negative electrode set fluid. The high safety performance of the battery is guaranteed while the non-electrochemical active material is reduced, and the electrochemical performance and safety performance are taken into account to meet the needs of electric vehicles. Optimize the battery structure, reduce the content of conductivity and binder, the amount of diaphragm, reduce the quality and volume of non-electrochemical active substances in the battery, and increase the battery energy density.

7, Jiewei Power

The company took the lead in the development and mass production of the three-part lithium ion power battery in China. The energy density of the single battery has reached 240Wh / kg, and the first large-scale production of 2.3 V/70Ah large-capacity flexible lithium titanate battery has been achieved.

In 2017, JV Power made outstanding achievements in product and technology development. The newly developed 240wh/kg high-energy battery is about to be mass-produced. The energy density of the battery system exceeds 140wh/kg, and 260wh/kg monomer battery completes B-sample development. The single battery with a power density of 7000 W/kg in high-power batteries was successfully developed, as well as PHEV batteries that can match a pure electric range of 70km. At the same time, the company has independently developed a battery management system for mass production applications. Currently, it matches the development of multiple models. JV Power has the complete development capabilities of a single battery, battery management system and battery system.

8, Penghui Energy

In the battery energy density, power density and temperature characteristics of the company to take good account of the results. The specific performance is 1. The volumetric battery energy density(cylinder, aluminum shell, and soft package) is 230 Wh/kg, the volumetric energy density is 260 Wh/kg, and the laboratory design battery energy density is 280 Wh/kg; 2, all batteries can satisfy 2 ~ 3C fast charge; 3, batteries can be charged and discharged in an environment of -20 ~ 60 °C, to meet the car in most parts of the country.

9, Tian Neng

The company's high safety, high energy, and high intelligence power cell system technology innovation is reflected in:(1) The use of 18650 type 3.2 Ah high-capacity core, battery energy density of 139Wh/kg; (2) The use of high-safety housing materials and battery module structures; (3) Adopt high safety PACK technology: Intelligent ventilation, heat dissipation, waterproof dust prevention, fire resistance and flame retardant through matrix structure design and new anti-explosion valve design; Intelligent management of each battery module through the heat management chip, when the current is too large, the fuse automatically fuse;(4) Adoption of BMS technology: Intelligent battery charging and discharging management and temperature monitoring, SOC, SOH monitoring, intelligent recognition of battery performance and equilibrium circuit, while real-time storage of voltages, currents, temperatures and other large battery data and intelligent analysis, decision-making; It also has the operation protection function outside the scope of the disabled safety mode, intelligent cutting off the power loop and automatically turning on the fire extinguishing function to ensure battery safety; In case of failure of the environmental control system such as heater, fan, air conditioner, and liquid cooling system, the safety mode is automatically turned on.

10, the real company should be

The innovation of the company's cylindrical lithium-ion power battery is reflected in 1. The safety of the battery surface junction structure is good. Even in extreme cases, the surface junction structure can block the oxygen in the air from invading the active material of the electrode when the shell is broken. Improve battery safety;

2, the battery surface junction structure makes the heat dissipation possessed by the set fluid itself fully utilized, and the heat is derived, so the heat dissipation performance is good. Compared with other structural batteries of the same capacity, the internal resistance is about 20 % smaller(the internal heat of the battery is directly proportional to the impedance size: Q = I2RC). Therefore, the overall temperature of the battery is low(2C discharge is less than 10 degrees, 1C discharge less than 5 degrees). Energy-type batteries have fast charge, high power discharge performance.

3, to avoid complex production processes(such as avoiding gap coating, avoiding multiple ears and welding, etc., the consistency of the positive and negative poles in close contact with the diaphragm, improving consistency and efficiency), high degree of automation, Easy to realize industrial 4.0 smart manufacturing, the company was rated as a smart demonstration workshop in Jiangsu Province. The use of pole through the hole and head plugging method avoids the drying room, improves the safety of the production process, and reduces the production cost.

11, National Battery

Breakthrough of lithium iron phosphate battery technology: 1 Breakthrough of conventional lithium iron phosphate battery energy density of less than 180 Wh / kg bottleneck; 2 On the basis of high energy density, the circulation exceeded 3,000 times, and the capacity remained at more than 80 % of the electrical performance index; 3 Safety performance meets the national standard requirements.

210Wh / kg ternary manganese product performance: 1 2000 cycles, capacity maintained above 80 %; 2 Good safety, acupuncture, fall, room temperature short circuit, overcharge, over discharge, hot box, extrusion, and other safety tests passed; 3 Standard dimensions, improve group performance and assembly efficiency, enhance compatibility and flexibility, and reduce costs.

12, Miao Sheng power

(1) Battery immune system: The company's first lithium-ion battery immune system, also known as the battery Bionic immune system, is equipped with smart Bionic protection functions to enhance resistance and prevent battery related diseases in vivo. Battery immune system can be divided into three functions: battery immune defense, battery immune self-stabilization, battery immune monitoring and so on, which has achieved the safety, reliability, consistency, high temperature and low-temperature performance of Lithium-Polymer power cells and other technical innovations. Is a revolutionary breakthrough for the entire battery industry.

(2) Fast charging thermostat technology: Its precise controlled thermochemical reaction maintains the stability of the internal elements of the battery and the structure of the electrode, allowing the battery to remain unchanged under the pressure caused by long-term charging, and this lithium electric technology can The battery life is extended.

(3) Instantaneous heat dissipation technology: When the battery encounters extreme short circuit, internal temperature increases, it is very easy to cause battery combustion, and there are great safety hazards. In the constant temperature system developed by Miao Sheng Power Technology Co., Ltd., which has a simple structure and extremely low energy consumption, a powerful single battery heat dissipation technology is used. Under extreme conditions, heat can be instantly emitted to ensure that the single battery in the battery pack will never occur. Burning, explosion, and other dangers.

13, Xinwangda

At present, 90 % of the 1,8650 core battery modules on the market use the traditional resistance welding process, while the automatic line independently developed by Xinwangda EVB uses the aluminum wire ultrasonic welding process. Xinwangda said that this is the first fully automatic production line of related technologies in China and the technology of the standard Tesla electric vehicle.

The traditional welding process is very time-consuming and easy to fail. It is also difficult to test the connection between batteries and whether there are problems with conductors. In contrast, the ultrasonic welding adopted by Xinwangda has multiple advantages of "compaction": First, the use of aluminum wire to achieve repeated welding, greatly improving maintainability and recovery rate; The second is that aluminum wire can adapt to the stress requirements and tensile test requirements of the car at the connection, and can even act as a 'fuse' to automatically fuse the circuit to ensure the safety of the circuit when short-circuiting.

14, China Power

The company's high-specific liquid-cooled battery system adopts a high-specific energy 18650 cylindrical battery monomer, making full use of the passenger car's irregular envelope space, greatly improving the mass-energy density and volume energy density of the battery system, and aiming at the characteristics of the battery. Efficient liquid-cooled system design, Optimizing internal heat field heat dissipation and heat management efficiency, effectively controlling the temperature rise and internal temperature difference during the use of the battery system, and ensuring that the battery system operates in a narrow optimal temperature range, realizing a leap from cooling to controlling temperature. Combined with the optimized fast charging algorithm, the battery system can reduce the charging time without increasing the decay of the battery life, and realize the optimal combination of battery system function, performance, reliability, and cost.

On this basis, Timothy Power has conducted in-depth system research and development on the security design of the battery system and has designed system protection from two aspects: active and passive safety, and four dimensions: monomer, module, system, and vehicle. It effectively prevents the diffusion of monomer heat out of control in the system. In addition, Hua Wei Power has also independently developed the production process and equipment of liquid-cooled battery systems, which has achieved key process automation, providing a solid foundation for mass manufacturing capacity improvement and quality control.

15, Guoguang Electronics

The company caters to the market and develops a Windable battery, which is divided into two types. One is a flexible battery suitable for smart bracelets, watches, and headphones. One is a segmented battery for the game handle class.

1, flexible battery: Guoguang Electronics from the material side, through the technical innovation of the flexible battery through the R120 ~ R60 bending 20,000 times, capacity retention rate ≥ 98 %, covered aluminum plastic box intact. After bending, the battery safety meets the requirements of GB31241, UL1642, IEC 62133 and other indicators. At the same time, the 0.5 C cycle is achieved for 500 weeks, and the capacity retention rate is more than 80 %.

2, Segment batteries: Guoguang Electronics innovates from several aspects of the aluminum plastic box shape, shape structure, and internal core parallel mode of lithium-ion batteries. This segmented battery bends 30 times, with a capacity retention rate of ≥ 98 %. The aluminum plastic box is intact. After bending, the battery safety satisfies GB31241, UL1642, IEC 62133. After bending, the 0.5 C cycle is 500 weeks and the capacity retention rate is more than 80 %.

16, Xi'an Sefu

The portable dual-use special start power supply developed by Xi'an Serf can be used for simulation experiments of the start-up power supply of military equipment such as emergency start power supply, aircraft, aircraft, tanks, and armored weapons, and the input power supply ofspecial equipment.

The special power supply has the high-power output required to support the start-up of the vehicle and can reach the technical level of 120C continuous discharge and 300C instantaneous discharge. The product can work in an environment of -40 ~ 65 °C and can be stored at a high temperature of 65 °C for a long time. At the same time, the product has the characteristics of good portability, which can provide a reliable guarantee for the start of the vehicle. It is understood that product-related technology has obtained 7 national patents, including 3 invention patents.

17, Zhongxing Piece

PowerCube series energy storage system has technical characteristics:(1) 96V ~ 1500V industry maximum voltage range lithium battery energy storage system; (2) 2.2 MW lithium iron phosphate battery system(including 500KWPCS) requires only 40 feet of standard cabinets, highly integrated, and leading in the energy density industry; (3) High safety and reliability, system pressure of 5000 V, through TUV, UL, VDE, CE, and other international safety standards; (4) Module design, adaptive configuration of multiple voltages; (5) Leading point-to-point active equilibrium technology, supporting active passive dual equilibrium, supporting inter-module equilibrium and battery cluster equilibrium; (6) Automotive BMS technology platform, dual CPU backup technology, high reliability design; (7) Ethnet/CAN / RS485 multiple communication interfaces.

The PowerCube series energy storage system adopts a modular architecture, tertiary BMS management, and voltage coverage 96V ~ 1500V, which can be flexibly configured according to customer needs.

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