Best laptop battery

According to South Korea “Chosun Ilbo” Oct. 8 news, Samsung Economic Research Institute recently conducted by the “Japan Korea industry economic analysis”, said: “In 2020, the global car market will account for 50% of hybrid vehicles and electric cars and other environmentally friendly cars on the market, not only Japan, South Korea may also be behind China. ”

Reported that the first type of environmentally friendly cars of the future investment, and China far more than South Korea. In 2004-2010 to 7 years, the South Korean government’s investment in this area amounted to 273.6 billion won (100 million won about 580,000 yuan.) And China plans to start this year 2020, in 10 years invest 1.7 trillion won. In R & D manpower has gaps. China’s hybrid and electric vehicles related to professional engineers to achieve 30000-4 million, while South Korea is less than 1,000. Japan achieved the world’s first hybrid electric vehicle production and sales, is consolidating its leading position in future market.

Samsung Economic Research Institute dedicated researcher Bok Deuk-gyu, said: “If the South Korean car companies are not environmentally friendly from now on preparing for the automotive age, 5 to 10 years will usher in a nightmare reality.”

Formulated by the New Energy Material Co., Ltd. Shenzhen Bei Terui, the national standard of Li-ion battery anode material has adopted the industry experts discussed and the related revisions. According to meeting sources, the standard is expected to launch by the end of October this year.

Shenzhen Bei Terui company is controlled by China Baoan Group Co., Ltd., which is a dedicated lithium-ion secondary battery with positive and negative materials, specialized manufacturers, set basic research, product development, production, sales and provide solutions in one . Currently, the company production of lithium-ion battery anode material, sales of the domestic number one, ranked third, is the city’s independent innovation, industry leaders, the State Torch Program, Ministry of Science and Innovation Fund for small and medium enterprise project.

November 2009, Shenzhen Bei Terui the company prepared to develop lithium-ion battery anode material for national standards. Since then, the Chinese Academy of Sciences Li-Quan Chen, Yang Yusheng, metallurgical industry, and Sun Wei, director of information standards from the Institute of Chinese Academy of Sciences, Tsinghua University, Beijing Polytechnic University, Wuhan University, experts and professors, as well as from Mozambique, the power of God and other lithium battery industry well-known enterprise management, R & D staff of 40 people took part in the discussion, and adopted the amendments to the national standards.

It is reported that Shenzhen Bei Terui the company has revised the national standards submitted to the National Standards Committee. The introduction of national standards, will help lithium-ion battery anode materials industry standards and integration.

On Tuesday, October 5, Germany BSW Solar Energy Industries Association said solar panels this year, German solar equipment prices fell by 13%, mainly due to the production efficiency of solar panels and solar panels to improve the field of investment.

The association said in a statement, the same rate if the price continued to decline in 2012, residents of the roof of the cost of solar power equipment will be the same with the conventional electricity production.

Germany will install a total of 8 GW of solar panels this year.

One of the iPad’s features many folks liked was that it could get up to 10 battery hours on a single charge. However, it seems that for some people that still isn’t enough. Perhaps, there are a lot of people out there planning to do lots of writing and editing, or reading, or playing games and watching movies while on vacation.

Sanho, maker of AC-outlet external batteries for several Apple products, has released the new HyperMac Stand for iPad with a built-in battery. The HyperMac Stand has a rectangular shape with two rubberized “soft-touch” slots to accommodate your iPad. One slot is angled at 18 degrees allowing you to type comfortably. The other slot is angled at 45 degrees and becomes more friendly to presentations and movie-watching.

Sanho has designed the stand in such a way that you can even fit your iPad while using Apple’s official iPad case. But, one of the main features surrounding this stand is the built-in 16 hour battery pack.

1, 0-40 ℃ is the most reasonable working environment
During battery using, humidity, static electricity and temperature have an impact on it, but the lithium-ion battery is most sensitive to temperature. Too high or too low temperature will bring negative impact to varying degrees, usually, the limits of lithium-ion battery ambient temperature is -20 ℃ ~ 60 ℃, while the 0 ℃ ~ 40 ℃ is the most reasonable working environment, but to play the potential of laptop battery performance, 20 ℃ or so is the best use of the environment.

2, -25 ℃ below will affect the battery life
Although the laptop battery in -20 ℃ environment allows to use, but this will affect the battery charge and discharge performance of very large, usually, the lower the ambient temperature, the battery inside the lower the activity of active material, electrolyte resistance and viscosity The higher the ion diffusion more difficult, not easy to charge and discharge the battery.

For example, when the ambient temperature is below zero, the battery charge and discharge efficiency will be greatly reduced, so the charge rate will be very slow, full time after power supply is only about 60% of the original, when the ambient temperature falls below the minimum temperature limit (for example – 25 ℃), the battery electrode reaction rate is very low, even from the freezing point of the electrolyte, the battery performance may be only 10%, seriously affecting the battery life.

3, 60 ℃ above may explode
As in the case with the low temperature, if the laptop battery in high temperature environment, which will affect the battery charge and discharge efficiency, but more serious damage to the battery, such as use of poor quality, or charger, charging time is too long, making the heat a larger battery, when the charge temperature exceeds the maximum limit temperature, which will destroy the chemical balance within the battery, resulting in performance degradation of battery materials, battery life decreased.

Similarly, the battery during the discharge time, that is, when we use the notebook as an internal short-circuit the battery or the battery design flaw, if the working temperature exceeds the maximum limits of battery capacity decreased, the life loss, but also a serious situation to explode, burning and other accidents.

Some low-cost battery charger using the absolute temperature charge termination. Although simple, low cost, but the charge termination method inaccurate. A better approach is by detecting the voltage drop when the battery is full charge termination. For the charging rate of 0.5C or higher NiCd battery,-ΔV method is most effective. -ΔV charge termination detection should be combined with the battery temperature detection, because the aging batteries and does not match the battery may reduce ΔV.

By detecting the temperature rise rate (dT / dt) can achieve more accurate detection of full charge, this full-charge termination detection than the fixed temperature of the battery better. Based on ΔT / dt and-ΔV charge termination methods can be combined to avoid the battery charge, longer battery life.

Fast charging improves charge efficiency. In the 1C charge rate, the efficiency can be close to 1.1 (91%), full of an empty battery time is 1 hour more. When 0.1C charge, the efficiency drops to 1.4 (71%), charging time is 14 hours.

NiCd batteries because of the extent of the power received close to 100%, so almost all the energy in the charge during the beginning of the 70% is absorbed, and the battery to keep cool. Ultra-fast chargers use this feature, the battery charge in a few minutes to 70%, with a few C’s current charge and no heat generation. To 70% charge, the battery and then charge a lower rate to continue until the battery is full. Finally, 0.02C to 0.1C end trickle charge.