GSODON BATTERY

Cheap charger is damage, cell phone power management need to be cautious B

ON Semiconductor vice president of sales Lin Jianming China: the near future, sales of mobile phones and adapters will be completely separate, which will pose a mobile phone side of the test charge.

Lin Jianming: If there is no perfect internal overcharge protection circuit, the battery will overcharge may cause an explosion of serious consequences.

Charging the phone interface, over-voltage is undoubtedly the most dangerous. Poor quality in the adapter, failure or user error then a different device adapter can happen. In general, your phone charge management IC can control the charge current and voltage, to maintain the security charge the battery. However, if the rated current of the input voltage is too high while charging, over charging management circuit can withstand value, the circuit components will be adjusted because of charge-off or burned out of control power and role. The worst case, at this time if the user also uses low-cost lithium batteries, could not complete overcharge protection circuit, the battery will overcharge may cause serious consequences of such an explosion. To this end the provisions of the phone in YD/T1591-2006 in the side to contain over-voltage protection circuit to prevent such from happening. Overvoltage protection (OVP) circuitry detects over-voltage fault conditions, the detection circuit will be switch off, disconnect the phone and the adapter output.

Power Management Products National Semiconductor Senior Application Engineer Zhongjian Peng: charge management circuit functions normally charge by the management of single chip (Charger IC), or integrated charge-management functions of power management chip (PMU) to achieve. Rechargeable lithium battery management circuitry to support features for the trickle charge, constant current charging, constant voltage charging of the three charging process, and should have protection mechanisms to prevent overheating. Advanced charge management circuit also should have the input voltage over-voltage protection function. The protection of the safety of the product itself is very important. Some unqualified charge management circuit, often lack the protection of the design, the circuit itself may cause damage to the system overheating, or even more serious security issues.

MPS Marketing Director Yuan Wenlin Asia: a new generation of rechargeable IC PMU have in addition to charging function through the highly integrated hardware to achieve high reliability, but also should have OVP (overvoltage protection), OCP (overcurrent protection) , NTC function, both a high input voltage, small size and simple external circuit. USB charger for battery management IC should be consistent with low standby power / charge current programmable switching / charging mode multiple input / can set the input power charger or USB port, and automatically charge the battery and cell phone distribution work be current; and in accordance with standard USB port of the limit.

Excellent cost-effective chip Recommended

Power Integrations’s primary regulator device, such as LinkSwitch, can maintain the electrical insulation, and does not require optical isolators in the case of feedback to provide precise output voltage. This can reduce costs, help design a smaller charger, while maintaining the necessary security clearance.

The latest LinkSwitch-II products with accurate voltage control, can be very accurately simulated USB port. In addition, the products include cable drop compensation, so regardless of cable above the extent of the loss of current, voltage can be kept constant.

LinkSwitch-II 5% voltage accuracy, current accuracy of 10%, for the adapter and charger is ideal. Also, it requires 20 components to build a complete AC power, which saves the cost of components itself, but also saves production time, assembly and inventory costs. “In China, labor costs have increased to around 0.003 U.S. dollars each component cost, for small patchy resistance and capacitor to say, in the cost of Shangzhangfuduo Gengda.” Doug Bailey of Road.

MPS full range of battery charging chips are produced using high pressure technology, have a minimum 20V, maximum 28V of voltage, and have been integrated over-voltage protection and meet the low standby power requirements. To comply with USB OTG low standby power requirements, a new generation of MP-2605X series also will reduce the standby current to 40uA, and increase the reverse input voltage protection (-16V) function, following the industry MPS charge chips widely used:

MP2605 standard charge applies to all chip general hand-held portable devices; MP26056 support USB / adapter pair of input interface for USB interfaces need to charge the portable device; MP2607 built pwr path, can be automatically assigned to charge the battery and the phone work current required for high-end hand-held portable devices such as smart phones, GPS navigation, PDA applications.

“Based on customer feedback, they are using MPS of charge chips, the great majority Yin Wei cost considerations Ercai Yong PMU / single chip charge management, but only to find defects line charge account all Ke Fan Xiu back the number of more than 20%, but cause the overall cost increase; but wants to be using external components to enhance the safety factor PMU, the additional cost and board area, also makes the industry difficult to sustain. At this point if the use of MPS battery charging chip, cost and product quality can be strikes a balance. “Yuanwen Lin said.

TI’s bq24070 series and bq24032A series provides a separate charge path and system power path, effectively prevent the repeated charge and discharge system problems, battery life is greatly extended; resolve the cell phone a full charge the battery consumption issues began to extend the standby time 10 ~ 20%; effectively prevent the system out of control due to CPU crash and the risk of charge, to prevent the result of external pressure and breakdown voltage over the issue, greatly increasing the reliability of the system; eliminates the additional over-voltage protection, and path switching MOSFET and Schottky diode, reducing total system cost. The adapter current consumption in the system and charge redistribution between the automatic on-demand, using a small adapter, but greatly accelerated the charge time and reduce costs while improving the user experience.

“TI advocates the path of dynamic power management in battery power management applications has been recognized by customers, such as dual-port (USB, AC adapter input, respectively) linear charge management chip bq24032A series, single-port bq24070 Series (USB, AC adapter to share an input), “Zhang was said.

ON Semiconductor has introduced a series of overvoltage protection chip. AC adapter for wall charging plug the NCP347/348, can provide up to 2A of charge mobile phone current and voltage transients up to 28V fault protection; NCP360 and NCP361 USB interface, suitable for positive over-voltage protection controller, with very low 35µA current consumption to meet USB standby requirements, NCP361 also has a current limit function; to meet the cell phone charger / power supply to accessories such as the demand for bi-directional current control, ON Semiconductor also forthcoming NCP370, provide ± 28V overvoltage protection and adjustable current limit.

SGM4054 as St Microelectronics state management in charge introduced the first product has now passed the test in a variety of applications and high-volume applications, the main features include: programmable charge current up to 800mA, high-capacity battery can achieve the fast charge; heat calibration can prevent constant current, constant voltage operation mode, the battery overheating and improve the safety of consumer products; by USB directly to a single battery charge, to meet the multi-product compatibility; with charging indicator, providing the user identification information; 1% charge precision, to ensure battery life; low shutdown current of 25µA, promote the effective utilization of power; own 2.93V trickle charge threshold, rechargeable lithium battery can be fully consistent with the standards process (trickle charge, constant current charging, constant voltage charged off recognition); with automatic recharge feature, to provide sufficient energy. Follow-up will launch high-pressure, high charging current of charge management chip, to meet the new demand for mobile phone application for more power.

National Semiconductor for different applications-rich charge management solution. A single chip charge management chip (LM3658), support for USB, AC-DC regulator of two inputs, and have overheating protection. There are many highly integrated power management chip (PMU) has well-integrated charge-management functions. Such as GPS, PMP designs PMU LP3913, the integrated support for USB, AC-DC regulator of two input and support of the charge current path management snap. There are many applications designed for mobile phones PMU as LP3919, more up to 28V overvoltage protection.

Via: Cheap charger is damage, cell phone power management need to be cautious B

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Wind fuel cell

Great Wall Electrical: wind energy fuel cell market flashpoint

U.S. stocks hit a new low last Friday by the impact of the two cities were opened slightly lower Monday, but rebounded strongly to start soon, especially in Shenzhen, in order to Vanke, the grain, as the representative of gold, led by property stocks, rose significantly stronger than the stock index. Stock index, the petrochemical and banking stocks planes the morning of Budie drag stock index rebounded into the circulation times Merchants Bank (14.62,0.35,2.45%), the performance of strange today, fell more than 5%, but then quickly pull up the afternoon , the rate of bank shares staged a large reversal success of the broader market stabilized. As closing, Shenzhen Component Index rose 2.03%, Shanghai Composite Index was up 0.5%, turnover of 1,100 billion yuan between the two cities, a greater reduction from Friday.

Operating suggestions: After last week, a substantial adjustment, the two cities showed stocks bottomed out in the situation, two sessions held this week, investors should give full attention to the policy level, pre-adjusted to the new theme provided ample room for speculation, should be concerned about the weight cap stocks at the same time, discover new hot market, controlling position to participate. Operation can still bargain involved in the concept of quality of new stocks of energy topics. Such as: Desai battery (7.94,0.44,5.87%) (000,049), Jinshan shares (7.67,0.46,6.38%) (600,396) and Huitong energy (8.74,0.45,5.43%) (600,506), etc. for all to see the performance of the proposed investors focus on wind energy and fuel cells also have the concept of the Great Wall Electrical (7.22,0.29,4.18%) (600,192).

Investment Highlights:

1, the fuel cell concept: the company with the Chinese Academy of Sciences, Dalian Dalian Chemical and other jointly set up a new source of power corporation, engaged in the development of proton exchange membrane fuel cell production. The company relies on its own intellectual property rights of Chinese Academy of Sciences DICP proton exchange membrane fuel cell technology, will be a variety of fuel cell production technology and product development, commercialization and industrialization of it as soon as possible.

2, wind energy concepts: the company to 51.8 million yuan acquisition of 100% equity interest in Lanzhou Electrical Machinery Plant, the company is mainly engaged in the development of wind power equipment manufacturing and high-end motor business, the development of the doubly fed induction wind generator control device technology leader living in China , has Xinjiang Wind Energy Company, Guangdong, South Australia to provide wind power plants and other generating units, will become a new profit growth point.

3, the main power equipment industry: the company is the industry-leading position in the western region of large electric power equipment enterprises, mainly engaged in low voltage switch equipment, high and low voltage electrical components such as product development and sales. Intended to 55.5 million yuan investment in new intelligent low-voltage electrical control of critical manufacturing processes and technological transformation of enterprise information system, put into production, the annual net profit of 14.54 million yuan after tax increase will mainly increase the generation of new GSC3 series AC contactor, GSR3 electronic overload relay, GSJ3 contactor relays, motor protection capacity of smart.

Secondary market, the stock price up 9.58 yuan from the recent pullback to the lowest point of 6.77 yuan today, the callback rate of nearly 30%, severe short-term oversold, the market outlook is expected to hold two sessions with a good opportunity to start a new round of upside trend, investors can focus attention.

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The era of new energy automotive industry

"Ten City, one thousand," one hundred electric vehicles start cum running hybrid buses 6 ceremony held in Wuhan, started a new energy automotive industry’s ice-breaking shoes, indicates that China has ushered in the era of new energy automotive industry.

Science and Technology Minister Wan Gang said at the ceremony’s speech, after "fifteen," since the technology research, China’s energy-saving and new energy electric vehicle technologies gradually mature, independent development of various types of electric vehicles into the market has been small-scale demonstration runs.

In the 2008 Beijing Olympic Games, China FAW, Dongfeng, Shanghai VW, Changan, Chery, the pass, and the Metropolitan Bus Foton independent research and development companies such as energy-saving and new energy vehicles, to include electric buses, hybrid cars, fuel cell passenger vehicles and pure electric vehicles, and other venues to "zero fault", "zero discharge" demonstration operations, the achievements of the Olympic Games in the history of most species, the most technologically advanced and largest green environmental services team.

According to reports, the government’s support, launched the first in China R & D and operation of electric vehicles in Wuhan, in recent years has been building electric car charging station 28. Currently, the city put into operation 319 sets of various types of new energy vehicles operating over 16 million km of total mileage, transportation of passengers over 30 million passengers, 3,100 tonnes less carbon dioxide emissions, saving 11 million liters.

To further promote the industrialization of new energy vehicles, the process of marketing high technology products to solve the initial conflicts between the size and cost, on a larger scale application of new energy vehicles, Science and Technology and the Ministry of Finance jointly launched the "city of one thousand ten" application of electric vehicle demonstration project, decided three years in each of the development of 10 cities, each city in public transportation, rental, service, municipal, 1000 launch of postal and other areas to carry out demonstration of new energy vehicles running, trying to make the operation of new national energy vehicles size of 2012 accounted for 10% of car market share.

Wuhan is the first nationwide pilot cities, the first running of the 100 hybrid buses, each cost 80 million ordinary buses than the current high cost of about 35 million. The Science and Technology and the Ministry of Finance launched the implementation of energy conservation and new energy vehicles to support and incentives will subsidize part of the vehicle 20 million -26 million higher than the rest by local government subsidies.

It is reported that the next 3 years, Wuhan will put 400 hybrid buses, 500 cars and 600 electric hybrid cars.

In the meantime, the state will invest billions of dollars to promote the use of new energy vehicles to give tax and financial subsidies to guide the concept of car consumption, consumption structure, product structure adjustment.

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Block made in China, the U.S. CPSC charger and rechargeable batteries for implementing the recall

October 23, 2008, the U.S. Consumer Product Safety Commission and the jumping frog Corporation (LeapFrog Enterprises Inc), today announced a game made for the Didj Custom seat charger and a voluntary recall of rechargeable batteries.

The recalled product is "charging stations" set by two rechargeable battery, AC charger adapter and seat components. Block Charger is white, the bottom green light. "Charging Station" suite of products model 30676, marked on the charger box and seat bottom. The "charging station" set from 7 October 2008, sales in the U.S., priced at $ 35 / set.

The number of recalled about 35,500 sets of goods. Reasons for the recall, the game upside down if accidentally present on the charger, rechargeable battery easily lead to overheating, and there is the danger of burns caused by the user. At present, the jumping frog from charging the company has received 12 reports of batteries overheating, including one the user hand was slightly burned.

To this end, the U.S. Consumer Product Safety Commission advises consumers to immediately stop using the recalled chargers and the supporting pedestal, rechargeable batteries and contact with the jumping frog full refund. Consumers can continue to use the game through the power adapter.

Genuine car battery 1 year and 3 bad-name

Purchase of new electric vehicles, batteries within a year three times to bad, and the battery more for the less durable, every few days to "strike." This new car, so that Wang Fu was a headache. He even more angry is that the original dealer to replace the battery every time to him who were not original. 12315 in Fuan City of Industry, Taiwan’s help, Mr. Wang has finally been satisfied with the recent statement.

Last Sept. 22, Mr. Wang Fu electric car dealership to buy a car worth 2,700 yuan in electric vehicles. Beginning with the half time, the car is running all the normal, the car can be to have the problem in May this year, had again and again. To the dealer a check, the original battery is broken, then to the Wang business to maintain the battery replaced. Can not last, September 8 not move the car, then had to replace the battery business. Mr. Wang did not expect to make is that this time the battery in less than a month on the bad, and he carefully check the battery only to find the original dealer to give him two batteries are brand-name for the. Mr. Wang will be angry complaints to 12315 units, require dealers to replace the original battery.

12315 in Fuan City of Industry, Taiwan, under the mediation of the patience of the staff, merchants agree to give Mr. Wang the maintenance of the same brand replacement batteries.

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Lithium Battery Energy saving Upsurge

With the constant fluctuations in international oil prices, energy saving environmentally friendly lithium battery in the limelight once again a hot topic. From 6 months, the number of international auto companies and electronics companies are using large-scale lithium battery joint investment. Including Toyota and Matsushita, Nissan and NEC, Volkswagen and Sanyo, Bosch and Samsung, they believe that lithium batteries in the next few years will gradually replace the nickel-metal hydride batteries, lead the direction of development of hybrid vehicles. Li-ion battery in the heat of global investment background, China’s automotive enterprises in this research work is in what kind of? Experts on the lithium battery is holding what kind of attitude? Recently, the reporter interviewed specifically on this issue who has studied the domestic lithium battery, several experts.

Beijing Institute of Electric Vehicle Engineering Center Deputy Director Lin Cheng

Study of lithium iron phosphate has been a breakthrough

Lin Cheng told reporters, demanding automotive lithium batteries. It requires that the vehicle used in a variety of conditions, must protect the security, can not occur fire, explosions and other accidents. The first was for battery electric vehicles, in this country has made great breakthroughs have begun to take industrial scale. But 5,6 years ago, with the battery powered vehicles are often some accidents, such cells will gradually be diluted. Now, the domestic lithium battery research progress quickly, especially in the battery safety issues, has made great progress.

Lin Cheng told reporters, lithium batteries include lithium manganese oxide and lithium iron phosphate batteries. At present, the development of the domestic lithium manganese oxide has begun to take shape. Lithium iron phosphate as safer, longer life, will become an important direction for future development of lithium batteries, but also abroad, the focus of research and development of the automobile. At present, lithium iron phosphate studies of good progress, especially in some of the patent on a breakthrough, this time for the Beijing Olympic Games is a passenger car with a self-developed lithium iron phosphate lithium battery.

"Of course with the study abroad compared to lithium batteries, the domestic lithium battery research still lags far behind, but the domestic lithium battery emphasis on increasing, the future will be the R & D focus." Lin Cheng told reporters.

Henan Huanyu Group lithium battery industry technology Deng Lun-ho, deputy chief engineer

Large-scale lithium batteries for electric cars need some time

Henan Huanyu Group is a component from the battery to the battery cell manufacturing plastics and related hardware, equipment manufacturing, electronics manufacturing, a complete industrial chain of the Enterprise Group, has undertaken the project of Science and Technology Li-ion battery research and development.

"At present the domestic lithium battery research and abroad, the gap is mainly reflected in the battery control system and power management systems." Deng Lun-ho told reporters that now the domestic lithium battery research for development in their respective state. Currently, some companies have been able to provide the corresponding lithium battery electric vehicle accessory products, supporting the general lithium batteries can run 200 to 500 km.

Deng Lun-ho told reporters that now the price is too high the domestic lithium battery, power management system problem has not yet been well resolved. Charging electric vehicles also face the problem. Currently, the general line at home can not charge lithium batteries for electric vehicles must be equipped with a small dedicated charger, and charging time is very long and very troublesome. Abroad, in order to solve this problem, generally regarded charging stations and gas stations together. China is now charging stations have not established a large scale.

Deng Lun-ho believes that the current consumer acceptance of electric vehicles equipped with lithium batteries it still more difficult: "the price of an ordinary electric car is about twice the same configuration or even higher gasoline locomotives, domestic consumers have not enough economic prepared to accept the power and electric vehicles. "

China Electric Power Research Institute engineer Chuang Feng

Optimistic about the prospects for the development of lithium iron phosphate

Chong Tong, told this reporter, the electric vehicle battery research and development work has gone from lead-acid batteries, nickel-metal hydride batteries to the development of lithium batteries, each battery advantages and disadvantages.

The earliest to appear in lead-acid batteries, used in the longest time, belonging to the battery series. The best safety performance lead-acid batteries, rare explosion, fire and other phenomena, energy storage effect is not ideal. Later, people developed a nickel-metal hydride batteries, store energy and power than the effect of the ideal lead-acid batteries, but due to nickel-metal hydride battery in the charging of hydrogen generated in the process prone to explosion, so the nickel-metal hydride batteries in a business may or may not state.

To the year 2000, people developed a lithium battery. Lithium batteries are lead-acid storage battery of power 2 to 3 times, but because it contains lithium-ion active in the metal layer surface, prone to spontaneous combustion in the air, explosions, etc., higher risk. So now the major countries is to control the development of lithium batteries is safety and stability.

"Charging a lithium battery would be able to cycle around 1000, in which the stored energy of lithium iron phosphate is better than lithium cobalt oxide and lithium manganese oxide effects worse, but it’s the best safety performance, than lead-acid battery energy storage much higher, so now the most promising lithium iron phosphate. "Chuang Tong said.

Society of Automotive Engineers of China, director Chen Quanshi branch of electric car

Three problems of domestic lithium battery research

Quan-Shi Chen said in an interview: "Now the state attaches great importance to the study of lithium batteries, ‘863 ‘project, the state invested a total of 66 million yuan, all development work for the lithium battery. We and Japan, the United States such as walking in the lithium battery research and development in the forefront of the developed countries, China’s lithium battery manufacturing precision, equipment, standards, etc. there is a certain gap between R & D details. "

Quan-Shi Chen told reporters that at present there are three issues of domestic lithium battery research. The first is the consistency of manufacturing. Since the lithium battery manufacturing technology and equipment there is a gap, the domestic lithium battery production technology mixed, manufacturing standards has not yet reached agreement. Lithium batteries used in electric vehicles are connected in series or in parallel, if the consistency issues are not well, then the large-scale production of lithium batteries used in electric vehicles will not be able.

Followed by the intellectual property rights. Currently in the study of lithium iron phosphate has made a breakthrough, but the U.S. patent in this area, so although some of our links to independent research and development, but in intellectual property issues, but also do not know how to respond.

The third issue is the selection of raw materials. Now the production of raw materials used in lithium batteries can not all imported, mainly from China, but domestic raw materials, through international certification, to produce lithium-ion batteries in order to be internationally recognized, so the link in the certification of raw materials and also some problems.

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