digital batteries

While last Friday at the frontline, led by blue-chip index rallied strongly to close a long Nice heavy volume in the shadow line, but this does not give the investor confidence, Sony VGP-BPS9/B Sony VGP-BPS9/S the opposite face of plunging last week in investor confidence has been strong blow earlier this week, the overall market fell again rapidly consecutive six-month online easy to fall, not only that, 3,000 points, was broken by a Suddenly, the Shanghai index back two years. Although in 3000 near the face of multiple key level of technical support, the index decreases temporarily halt and began to stabilize and begin a rebound, but the bounce is low, the lack of intensity, the volume not meet the show closed on the political side, he performed in the case of stock index plunged as investors lack confidence in the afternoon. Hard to see the defensive performance last week in the banking section to a week, suddenly became hostile, collective fall, originally as A shares Dinghaishenzhen performance of bank stocks last week, has given hope to market, but this week, the mutation makes the already fragile psychology of investors as the worst It also reminds us that the emphasis placed on the market sharply down to circumstances, and no real resilience of the plate, down only after another and the difference in size between points. For weeks later, with the overall market has stabilized, inventories of assets increases the degree of fall before the strong performance of stocks in the cons once the role of vanguard, again out of the color disc, there are signs of remarkable economy with low emissions of carbon in this section weeks, there are signs of strength, with the overall market stabilized at a low level of economic activity carbon plate significantly improved, the overall outperformed. Latitude D620 battery Latitude D820 battery

We believe that since the policy’s New Year’s ultra-tight ahead of schedule completely disrupted the pace of market operation, originally planned by the policy mid-year in May have to start tightening after, if institutions are also expected to deploy in the coming year based on this market, a substantial increase in position to reach record levels, all in the quarter to meet market performance, after that time prepared to deal with the possibility of contraction. The political aspect, however, before crunch, one quarter of the stock market, it is difficult to start an urgent adjustment of a quarter of the strategy of organizations, to attract the attention of the Annual Report 2009 and 10 years turn a quarterly management policy and activities. With the decline of the index Invented early at a high level of consolidation, followed by the fall, we believe that organizations in this regard is likely to be significantly lighten up, which determines the index of short-term it is difficult to bounce back. Stabilized later in the week, mainly with the support of many technically important and unite against oppression short, but a lack of confidence in market conditions, technical factors is not sufficient to support the index rebound effective, and our tendency to short-term market volatility is still not optimistic, technically weak, the overall market fell again, Wei Po greater the probability of the event seems to be the next level of support may une actual line of the year and last year nearly empty in early October, the points are close to about 2800. But while the short-term trends we are not optimistic about the broader market, but we still want to reaffirm the long-term trend for the overall market is still optimistic, Satellite M105 battery Satellite M40 battery we note the reported time and again under the direction of the CBRC, the banking system behavior unscrupulous lending remarkably reduced if the future behavior of bank lending tends to a rational, then the concerns about inflation, and thus the central bank to raise interest rates in view of concerns can be alleviated, allowing stocks digesting the policy tightening is expected to surface after the economic recovery and performance of listed companies to strengthen its support for re-strengthening.

Strategically, we recommend investors to keep a proper caution, because of the weak broader market rebound, according to past experience, in the bottom-up limited space conditions, the market bottom in May re – to find the bottom bracket. So if next week if you still have broad market rally, investors may be reduced appropriately positions to free up funds to respond to a possible decrease in low margin calls and reduce ownership costs. For the most radical, ready to bounce Bo investors, we recommend controlling attention to the position Kuaijinkuaichu, concern that the recent trend of strong, sexually active shares, stocks of large flexible, these stocks safer. And if the broad market as depressed as we expect, we recommend that investors can boldly approach to increase the position. ThinkPad T60 battery ThinkPad R32 battery

Paper, we propose new energy sector investors with appropriate information, focusing on Li-ion battery industry. Last year in late November, the Chinese government has solemnly declared outside 2020, carbon emissions per unit of GDP below the 2005 level of 40-50%, although in December the same year the Danish capital of Copenhagen climate summit did not reach a valid and binding agreement This agreement, however, caused by global warming requirements for reducing emissions is the common aspiration of all people, future efforts to reduce emissions will not be frustrated because of the climate conference weakened. International obligations, the Chinese government always keeps his word, the line must be fruit in 2010 will be the horn into the era of the first year savings to low-carbon, new energy is a major component economy with low emissions of carbon can be expected over the next decade, the new energy industry of the explosive growth of China will occur, the economic structure of industry in China will occupy an important strategic position. The new energy sector leads in many areas, we recommend investors to focus on industrial lithium batteries. Lithium batteries are new materials is an important base materials for electric vehicle battery, and new energy vehicles is the state’s strategic and emerging industries, the state strongly support the development of strategic industries according to the State Council promulgated the “planning to revitalize the auto industry to adapt,” Vostro 1720 battery Vostro 2510 battery 2011 years, China will form a new energy Qijuchanneng 500,000. Sales of passenger cars energy represented about 5% volume total sales. “Planning” writing experts predict that by 2012, hybrid cars in China will reach 50 million vehicles, pure electric vehicles to maintain a volume will reach 10 million units. In 2020, cars hybrid in China will reach 18 million euros, pure electric vehicles farms reach 4 million. Therefore, one can imagine the future of new energy vehicles in what would mark the beginning of dramatic growth, which will new energy automotive battery infinite space for development. The country began to be introduced this year, supporting policies to promote the development of new energy vehicles, such as the purchase of vehicle programs for new energy subsidy development plans of new energy vehicles will be phased out this year, in addition to the national grid, Southern Power Grid has also begun to implement new energy sources around the gas station Vehicle Charging station building, according experts, an intelligent network planning new energy vehicle charging stations in the planning area. Therefore, we can expect this year, new energy vehicles will have a range of dividend policies. In terms of disk Li-share price ion battery company in mid-January started a wave of Shenglang the main market, although the overall market has declined over the period, these companies have also appeared some decline stock prices, but later in the week, the stock has become active again. Taking into account the hours shorter in February, March to the period of two economies with low carbon is the central theme of the conference which will greatly boost the stock rose, and related policies should be put in place so that these actions Shenglang main waves of the future, market, investors can pay attention due to choose the right time to intervene and usher in the new master Shenglang Quotes. PB991A PB992A

I am grateful that we have chosen a new energy industry, the current global village, the traditional sources of energy has been gradually ozone. Sony VGP-BPS9/S Sony VGP-BPS9A The oil will be in 50 years time, disappear completely, natural gas, the coal industry will gradually diminish, global consumption has led to further global warming and environmental degradation, which is unfair to our future generations, they shall provide, as our predecessors paid the bill!

Since the advent of lithium-ion battery has been around it for research, development work has been continuously engaged in the last century, the late 90s has developed a lithium-polymer battery, 2002, introduced after the lithium iron phosphate.

Mainly by the internal lithium-ion battery cathode, anode, electrolyte and membrane composition. Positive and negative electrodes and electrolyte materials, and discusses the differences in batteries of different properties have different and have different names. Currently on the market for lithium-material ion battery cathode is mainly of lithium cobalt oxide (LiCoO2), plus a few used lithium manganese oxide (LiMn2O4) and nickel oxide lithium (LiNiO2 ) as cathode materials for lithium-ion batteries, generally after the two types of positive outcomes materials, lithium-ion battery known as Battery Lithium “manganese” and “nickel-lithium.” The new Iron Battery Lithium Power phosphate is lithium iron phosphate (LiFePO4) cathode material for lithium-ion batteries, lithium-ion battery is a new family member. Latitude D620 battery Latitude D820 battery

Overall electrolyte lithium-ion battery is a liquid, but later developed a solid electrolyte and polymer gel, describes this type of lithium-ion battery for lithium polymer batteries, its performance is better than lithium liquid electrolyte -ion battery.

Full name of the lithium-iron phosphate should be lithium iron phosphate lithium-ion battery, this name is too long, designated lithium iron phosphate. Because of its properties, particularly suitable for power applications, then the name of “power” should be, ie, lithium iron phosphate battery power. Some call it “Lithium Iron (Life) battery.”

LiFePO4 cathode material used to make sense of

Currently used as cathode material for lithium-ion batteries are mainly: LiCoO2, LiMn2O4, LiNiO2 and LiFePO4. The material composition of the battery cathode metal elements, cobalt (Co) the most expensive, and limited storage capacity, nickel (Ni), manganese (Mn) are cheaper, and iron (Fe ) the cheapest. Cathode material prices and prices of these metals in Online Courses. Therefore, using LiFePO4 cathode materials for lithium-ion battery should be made of the cheapest. Another characteristic of the environment, it is pollution. Satellite M45 battery Satellite M50 battery

As a rechargeable battery requirements are: high capacity, high power, responsible for good performance-cycle of discharge, stable output voltage at high current load and emergence, stability and electrochemical performance, the use of security (will not overcharge, over discharge and short circuit caused by the malfunction of fire or explosion), the operating range of temperature, non-toxic or less toxic pollution environment. LiFePO4 as cathode using iron lithium phosphate in these performance requirements are good, especially in the large rejection rate of discharge (5 ~ 10C discharge) the discharge voltage is stable, security (no burning, no explosion), life on the number (cycles), pollution of the environment, it is the best, and is currently the best high current battery power supply.

The structure of LiFePO4 battery and operating principle

Internal structure of LiFePO4 battery shown in Figure 1. The left is the structure of olivine LiFePO4 as a battery anode from the cathode sheet and connected to the middle of a polymer membrane that separates the positive and negative, but the lithium ion Li + by through e-mail can not be on the right is carbon (graphite) to form a battery anode copper foil and the negative terminal of the battery connection. Between the upper and lower ends of the  F4812A HSTNN-lB31 battery electrolyte battery, battery enclosed by a metal housing.

LiFePO4 battery charging, the cathode in lithium-ion Li + migration through the polymer membrane to the cathode in the discharge process, the negative electrode in lithium-ion Li + migration through the membrane to the cathode. Lithium-ion battery Lithium-ion is a charge and discharge because of back and forth when you move and appointed.

Performance of LiFePO4 batteries

Battery voltage nominal LiFePO4 is 3.2V, the termination of the charging voltage is 3.6V, the termination of the discharge voltage is 2.0V. Because each manufacturer uses the material of positive and negative electrode, the electrolyte materials, quality and different processes, their performance will be some differences. For example, the same model (the same package, standard battery), the battery capacity are very different (10% ~ 20%).

Lithium iron phosphate power performance of the main battery shown in Table 1. For further comparison and the rechargeable battery, also listed in the table, the performance of other types of rechargeable batteries. Here, it should be noted that the plant iron phosphate lithium various performance parameters of a battery in all there will be some differences; In addition, there are few performances of the battery are not included, as the stack internal resistance, self-discharge rate, charge and discharge temperature. Aspire 3000 battery LCBTP03003

The capacity of lithium iron phosphate is very different, may be divided into three categories: small, few to several milliamperes 0:00, tens of milliamps of medium to large scale of several hundred milliamps. Different types of batteries there are differences between the same parameters. Here, again describes a common application of a wider package of standard parameters small cylindrical lithium iron phosphate battery power. His profile external dimensions: 18mm diameter, 650mm high (model 18650), its performance parameters, as presented in Table 2.

Typical discharge characteristics and life

A model of iron STL18650 energy of lithium phosphate battery (1100mAh capacity) rate of discharge of various flow characteristics in Figure 2. The minimum rate of 0.5 ° C, the maximum discharge rate of 10C, five different rates of rejection of the constitution of a group of discharge curves. As shown in Figure 2, no matter what type of flow and discharge voltage of the course is very flat (ie, the discharge voltage stable, essentially unchanged), and only near the end of the voltage discharge curve was bending down (800mAh discharge reached only after a downward turn). In the range 0.5 ~ 10C discharge rate, the output voltage is in the range 2.7 ~ 3.2V. This shows that the battery discharge characteristics well.

Figure 2 STL18650 flow characteristics of KD186 NF343

Capacity 1000mAh of STL18650 at different temperatures (-20 ℃ ~ 40) of the discharge curve in Figure 3. If at 23 ℃ when the discharge capacity of 100%, while the discharge capacity at 0 ℃ reduced to 78%, while in -20 ℃, when reduced to 65% at 40 ℃ and discharge flow capacity at just over 100%.

Figure 3 STL18650 in multi-temperature conditions of the discharge curves

STL18650 the prosecution and the curve of the life cycle of the discharge of figure 4. Its charge-discharge cycle conditions are: 1C rate charge fees, to 2C rate discharge after 570 charge discharge cycles. Characteristic curve of Figure 4 can be seen, after 570 charge discharge cycles, its discharge capacity remained unchanged, indicating that the battery has a long lifetime.

Figure 4 STL18650 charge and discharge cycle life curves

Over-discharge to zero voltage test

Use STL18650 (1100mAh) battery discharge lithium iron phosphate zero high voltage tests done. Test conditions: The 0.5C charge rate will 1100mAh battery is full of STL18650 and then use the 1.0C discharge rate of discharge to the battery voltage is 0C. 0V then put the battery divided into two groups: group storage of 7 days, another group of storage 30 days, deposited with the 0.5C charge rate after the expiration of full employment, and 1.0C discharge. Finally the comparison of the two zero voltage should be kept different from the difference. Vostro 1720 battery Vostro 2510 battery

The test results, the zero-battery voltage 7 days with no leakage, good performance, capacity is 100% retained 30 days, no leaks, good performance, capacity, 98% not retained 30 days after three times the battery cycle discharge capacity returned to 100%.

This experiment shows that the battery, even if there has been discharged (or even at 0V), and period of storage time, the battery does not leak, damage. These other types of lithium-ion batteries have the features.

Characteristics of lithium iron phosphate

With this introduction, the characteristics of LiFePO4 battery can be summarized as follows.

1 high output performance: discharge standard for 2 ~ 5C, continuous discharge high current capacity of up to 10C, the discharge pulse instantaneous (10S) of up to 20C;

2 at high temperatures with good performance: external temperature of 65 ℃, when the temperature is as high as 95 ℃, the purpose of discharging the battery temperature to 160 ℃, the structural safety of the battery good condition;

3 Injury even if the internal battery or external battery is not burning, no explosion, security, the better;

4 excellent life cycles, after 500 cycles, its discharge capacity is still above 95%;

5 excessive discharges to zero volts and no damage; PA3396U-1ACA PA3467U-1ACA

6 load faster;

7 low cost;

8 pairs of environmental pollution.

Lithium iron phosphate power applications

As the lithium iron phosphate with the above characteristics, and produce a variety of different sizes of batteries, and soon to be widely used. There are major areas of application are:

A big electric vehicles: buses, electric cars, tour buses and hybrid vehicles and other attractions;

Two light electric vehicle: electric bikes, golf carts, small cars dead battery, forklifts, electric vehicle cleaning wheelchairs, etc.;

3 Power Tools: electric drills, electric saws, lawn mowers, etc.;

4 cars remote control, boats, planes, toys;

5 solar equipment and wind energy storage;

6 UPS and emergency lights, warning lights and a miner’s lamp (safety above);

7 one-camera replacement 3V lithium battery time and 9V Ni-Cd or Ni-MH rechargeable batteries (same size);

8 small medical equipment and portable instruments.

To provide a lithium iron phosphate can cause the battery replacement battery acid sample application. Using 36V/10Ah (360Wh) lead acid batteries, weight 12kg, load a battery can run about 50 km, number of charge cycles is approximately 100 times, the use of time is approximately 1 year. If using the Power Battery Lithium iron phosphate, using the same energy 360Wh (12 10Ah batteries in series), it weighs about 4 kg, charging time can run 80 km or more, number of cycles Load up to 1000 times the service life of up to 3 to 5 years. Although the lithium iron phosphate more expensive than lead-acid batteries is much higher, but the overall economic effects, or the use of lithium iron phosphate power better, and the use of more lighter and better.

On a small scale lithium iron phosphate battery power IBM ThinkPad R32 battery  IBM ThinkPad R50 battery

On a small scale lithium iron phosphate power battery is a standard, there are cylindrical and rectangular. Such that the cylindrical model are 18,650.26650 and so on. Type the first two are in diameter, after two or three very (in mm), or 18,650 of the diameter size of 18, a height of 65. Rectangular models 103450R, 183665R, etc.. The first two is the thickness of the stack, the middle two are the width of the battery, the latter two is the length of pile (mm unit). Factory battery in the model are often preceded by three letters to the Factory standard, as the model of the × × × 18,650