18650 battery rechargeable.A major breakthrough in power lithium battery technology, electric vehicles are not afraid of battery degradation

A major breakthrough in power lithium battery technology, electric vehicles are not afraid of battery degradation

Generally, the power storage performance of the battery will decrease as the number of charges and discharges increases, and users will face the problem of insufficient battery life. On March 22, 2017, Tesla, the leader in the field of electric vehicles, announced that they had achieved breakthrough results in the field of power batteries. Tesla chief battery scientist Kurt Kelty and

Usually, the power storage performance of the battery will decrease with the increase in the number of charges and discharges, and users will face the problem of insufficient battery life. On March 22, 2017, Tesla, the leader in the field of electric vehicles, announced that they had achieved breakthrough results in the field of power lithium batteries. Tesla's chief battery scientist Kurt Kelty and technology research and development partner Jeff Dahn of Canada's Dalhousie University gave a speech at the International Battery Symposium and Exhibition, saying that the battery pack capacity of Tesla Model 3 only decreased by 5% after driving 480,000 kilometers. Improving certain chemical components in NMC ternary lithium-ion batteries can limit the harmful gases that appear when the battery is running under high pressure, and this improved battery cell can still have excellent performance after more than 1,200 cycles. Calculated at 20,000 kilometers per year, it would take 80 years of continuous driving for an ordinary car to scrap a Tesla car. The new technology has been commercialized and used in Tesla products, which is expected to be the Model 3 sedan scheduled to be launched in July this year.


This is exciting news for everyone in the battery industry. Compared with fuel vehicles and electric vehicles, it is self-evident which one has more future. The battery problems of ultra-long endurance and energy attenuation have been solved, and the market capacity of electric vehicles is only a matter of time.


The production and application market of electric vehicles is one of the manifestations of the successful commercialization and rapid development of the energy storage industry. According to incomplete statistics, my country's production and sales of low-speed electric vehicles were approximately 700,000 units in 2015, and reached 1.2 million units in 2016. Judging from the development route and battery technology level of electric vehicles, low-speed electric vehicles will be the mainstream of my country’s electric vehicle development market in the past ten years and will also be an important supplement to the new energy vehicle industry in the next ten years.


Technical innovations in the battery field have also shown various possibilities to the energy storage industry. Last year, Huawei Central Research Institute Watt Laboratory announced a major research breakthrough in the field of lithium-ion batteries at the 57th Japan Battery Conference, launching the industry's first high-temperature and long-life graphene-based lithium-ion battery. Experimental results show that the new high-temperature resistant technology based on graphene can increase the upper operating temperature of lithium-ion batteries by 10°C, and the service life is twice that of ordinary lithium-ion batteries. According to data recently released by the National Bureau of Statistics, from January to February 2017, my country's cumulative output of lithium-ion batteries was 1,144.85 million units, with an average monthly output of 572.42 million units.
Low temperature lithium iron phosphate battery 3.2V 20A -20℃ charging, -40℃ 3C discharge capacity ≥70%

Charging temperature: -20~45℃ -Discharge temperature: -40~+55℃ -40℃ Support maximum discharge rate: 3C -40℃ 3C discharge capacity retention rate ≥70%
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Through technological innovations one after another, the development of batteries helps realize the safe and fast charging function of electric vehicles and rapidly promotes the market popularization of electric vehicles. The true combination of the new energy vehicle industry and the energy storage industry is within reach. Cao Cheng, the person in charge of the 2017 Second Asia-Pacific Battery Exhibition, which will be held at the Guangzhou Canton Fair Complex from August 16 to 18, 2017, said that my country is a superpower in the promotion and application of new energy. In recent years, the country has successively introduced relevant Supportive policies can give a glimpse of the government's great determination to develop new energy industries such as electric vehicles and energy storage. With its international high-end positioning, the Asia-Pacific Battery Exhibition is in line with the government's plan for the future development of the new energy industry, and has received key support from the government, fully subsidizing companies to participate in the exhibition. Exhibitor data may reflect the current development status of the battery industry to some extent. It is reported that compared with last year, the number of companies active at the exhibition this year has increased by 500% year-on-year. Industry giants Lishen Battery, Waterma Battery, Haistar Co., Ltd., Shuangdeng Group, Keihin Electronics and other power lithium batteries and BMS Company, battery equipment companies such as Hongbao Technology, Jinming Technology, Han's Laser, and battery material companies such as Capulet and Haili Technology have joined. By the time of launch, the exhibition area of brand companies in the battery and BMS sectors alone will reach 15,000 square meters. In terms of buyers, it is expected that 35,000 people from more than 40 countries and regions around the world will visit the exhibition, of which the proportion of foreign buyers may reach about 15%. At the same time, the 2017 Asia Power Lithium Battery and Energy Storage Technology Summit will focus on three core contents: power lithium battery technology and intelligent manufacturing, power lithium battery applications and BMS battery management systems, energy storage systems, and technology and engineering applications. The dual-engine model of high-end product display + technology forum can play a very good role in promoting the healthy and orderly development of the domestic battery industry. I believe that battery industry companies with real technical strength will not miss this kind of opportunity at an international battery conference. Opportunity to announce research results to the world.


In the past five years, the global energy storage industry has experienced a compound annual growth rate of 193%. It is expected that the capacity of my country's energy storage market will reach US$100 billion in the next 10 years. The cost of energy storage has further declined, the peak and valley electricity price system has been improved, compensation mechanisms such as demand-side management have been established, and the development of multiple value-added services on the user side of the power market have emerged, as well as the continuous development and application deepening of energy storage market segments. The energy storage market will become the first to realize the commercial application of energy storage in my country. According to predictions from Starting Point Research (SPIR), the energy storage field has become an important choice for large companies facing traditional business saturation or implementing transformation and development. The market growth space will exceed 100 billion yuan in the next five years. A number of battery companies such as Narada Power Supply, Shanshan Co., Ltd., Guoxuan Hi-Tech, Xiongtao Co., Ltd., and Mengshi Technology have stepped up their deployment in the energy storage field.


At present, energy storage has been included in the top 100 engineering projects of my country's 13th Five-Year Plan, and it is also the first time it has officially entered the national development plan. At the same time, relevant policies such as the 13th Five-Year Plan for the energy storage industry have begun to be formulated and are expected to be introduced one after another. At the same time, the National Development and Reform Commission and the National Energy Administration jointly issued the "Energy Technology Revolution Innovation Action Plan (2016-2030)" and the "Energy Technology Revolution Key Innovation Action Roadmap", requiring research on efficient utilization of solar thermal energy and high-temperature heat storage technology, Large-capacity heat (cold) storage technology for distributed energy systems. Research on physical energy storage technology for grid peak regulation and efficiency improvement, regional energy supply applications, renewable energy grid integration, distributed and microgrid, and energy storage technology for electric vehicle applications, master the key core technologies in each link of energy storage technology, and complete Demonstration and verification, the overall technology has reached the international leading level, leading the development of international energy storage technology and industry.


The development of my country's energy storage market has entered a turning point in commercial development. At present, the high cost of energy storage and the technical cost of new energy fields are still paid by the government. The government has completely switched to market footing. User footing is the goal of the next stage. Looking at the current aggressive progress of major capitals and companies in the battery field, the overall situation of the secondary energy market using electricity as the carrier is becoming optimistic. In heat conduction welding, the laser beam will melt on the surface of the workpiece along the seam, and the molten material will flow together and solidify to form a weld. Mainly used for relatively thin materials, the maximum welding depth of the material is limited by its thermal conductivity, and the weld width is always greater than the welding depth.


Deep penetration welding, when the high-power laser is focused on the metal surface, the heat will not have time to dissipate, and the welding depth will sharply deepen. This welding technology is deep penetration welding. Because deep penetration welding technology is extremely fast, has a small heat-affected zone, and minimizes distortion, this technology can be used when deep welding is required or when several layers of materials are welded at the same time.
Low temperature and high energy density 18650 3350mAh-40℃ 0.5C discharge capacity ≥60%

Charging temperature: 0~45℃ Discharge temperature: -40~+55℃ Specific energy: 240Wh/kg -40℃ Discharge capacity retention rate: 0.5C Discharge capacity ≥ 60%
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The important difference between heat conduction welding and deep penetration welding lies in the power density applied to the metal surface per unit time, and the critical values are different for different metals.