Lithium-ion rechargeable
laptop battery has been equipped with many portable products, but repeated incidents of fire due to
battery failure and had to replace the problem of recovery. Various battery manufacturers and product manufacturers are working hard to ensure the reliability and quality assurance, but the problem still has not been completely resolved.
To this end, an interview with reporters in the safety of lithium-ion rechargeable
FK890 battery,
GK479 with the design of battery management circuit design technology, technical director of the Taiwan Olympic Celxpert Zhong Secretary rattan. Austria rattan MoliEnergy from Canada in 1987 when the company began working to set up battery charging circuit protection circuit and the development of design, at the same time he was director of technology NECMoliEnergy product development ministers and ministers, which are lithium-ion rechargeable battery development, such as peripheral circuits of the battery pack safety design expert . Recently started to develop large lithium-ion automotive battery, fuel cell and lithium-ion rechargeable
Pavilion dv6000 battery , such as a hybrid battery.
Q: Li-ion rechargeable battery with the battery pack which is now being used for the field?
Austria rattan: the 20th century, 90’s, was a large number of
batteries used in cameras, still cameras and personal computers, and later started with cell phones, game consoles and other electronic products. Recently, its use extended to the power tools, electric scooters and electric cars and other fields. Will also extend to the future of electric vehicles, industrial / consumer-type batteries in areas such as fixed.
Q: What experience battery change?
Austria Goto: first in the popularity of lithium-ion rechargeable battery car lead battery charger and even after discharge would not have been too dangerous, from the security point of view, easy to use. The lithium-ion rechargeable batteries need to be used with caution, to improve the security of electronic circuit technology has become indispensable. Later, a large number of lithium-ion rechargeable batteries for portable products, in order to enhance efficiency, the beginning of the use of micro-control of microcontroller.
In future, the lithium-ion rechargeable
HP laptop battery technology and circuit control technology will be further developed. Should strive to avoid not only dangerous, but also predict the risk of self-diagnostic system.
For example, forecast that the unit will lose the balance of the system response is very important. Lithium-ion rechargeable battery cell in series with the increase in the balance of an issue unit. Loss of balance when the unit, the battery voltage becomes 0V to reduce or, if the batteries continue to charge and discharge, fire and smoke on the accident-prone. This issue 10 years ago has been pointed out, but add in the protection circuit unit balance circuit,
DELL laptop battery able to solve this problem.
Not only can take advantage of the protection circuit to avoid the crisis, but also able to predict this phenomenon and to take countermeasures will become essential. In addition, when the need to balance unit in parallel, voltage and resistance changes in response.
Security design, effectively accumulated over the past at the time of charging the double fault protection institutions (secondary protection circuit) for the fuse to cut off the circuit components, such as technology. And, further into balance with the protection circuit module and so on, to achieve a more secure design. Now also try to further improvements.
Q: Li-ion rechargeable
Compaq laptop battery has been full of universal history of the past 20 years, when the remains of fire accidents occur from time to time and such failure caused the recall. Why do not eradicate these problems?
Austria Goto: safety design technology is a long-term commitment, continuous improvement. But I believe that battery technology is now with the circuit technology and product design staff is not very good cooperative relations. The past, the three areas is essential to promote the development of close co-operation. 10 years ago, few manufacturers supply unit, the three have been collaborating to develop until the requirements of the mutual understanding of each other. Now, sometimes the
Presario 2500 battery ,
Presario R3000 battery technology and battery designers have to take orders from vendors, in accordance with their demands, increase energy capacity and reduce prices.
Sometimes over-improve the energy capacity of the cycle of the expense of battery life, and sometimes for lower prices, safety design to muddle through, and thus lead to accidents and failures.
In improving the energy capacity, the basic unit or increase the quantity and the use of the materials being developed adequate safety testing. Not a good way. Battery technology with the circuit technology and product design staff established a cooperative relationship between the need to fully carry out consultations.
Configuration, the
Sony laptop battery design and manufacturing side the best side should make a consensus. For example, it can identify in advance of the battery-powered notebook computers need time to reach 3 to 4 hours or more. Now, at the airport and the plane can be recharged. Can also increase the time a number of battery-powered models do not need that long. Not only to compete in the energy capacity, the key is on the user’s point of view of security.
In addition, now does not allow mass production, a large number of sales, a large number of abandoned. Want to have to take this into account. In energy-saving plays an important role, and to shoulder the mission of environmental protection can not be a large number of discarded batteries. Should strive to develop more secure, long-term use of the battery.
Q: the future of lithium-ion
PCGA-BP2NX battery ,
PCGA-BP2NY battery energy density will be increasing attention to the issues that should be?
Austria Goto: volume in the same energy in a closed up, means that the risk from a step closer. 10 ~ 20 years ago have been found: the use of Ni (nickel), the capacity to increase the risk of very large.
Of course, in considering the safety of products before the actual operation, but in a mixed Ni or Mn (manganese), it is important to be prudent to ensure security. Previously, when I MoliEnergy, someone was nickel acid lithium-ion
VGP-BPS5 battery burn passthrough. Although the academic literature data well, but did not address the fundamental security issues. It should be noted that whether the products of manufacturers and products have been described in detail the user is not involved in some of the literature.
Battery pack design, the energy density increases, so should pay attention to safety and service life. For example, I think the design of the battery pack using the appropriate system, such as self-diagnosis is essential.
Q: Li-ion rechargeable batteries
VGP-BPS2 battery ,
VGP-BPS2A battery ,
VGP-BPS3 battery for future use will be expanded to hybrids, electric cars and batteries in areas such as fixed, the safety of these uses should be designed to pay attention to what?
Austria Goto: As mentioned above, with the lithium-ion rechargeable battery cells connected in series increase in the number of units will be the question of balance. The electric vehicles now in series with a lot of units, units of the imbalance will become big problem. Need to consider how the imbalance in separate cells and systems. Driving process, as a result of battery fire, smoke led to drivers not to panic and lead to traffic accidents is not possible. Hence the need for even lower speed, but also the vehicle to a safe place to guide the system.
Storage applications, lithium-ion rechargeable
VGP-BSP13/S battery low self-discharge, the most suitable for storing electricity. Is the most suitable for solar cell and battery combination of wind power. Now, is in the process of development of 1kW-class home fuel cells, fuel cells are expected to support the use of start-up and storage of Li-ion rechargeable batteries.
Q: Most of the past stand in battery manufacturers and battery manufacturers to develop battery manufacturers control circuit. Easy to lose sight of the product of the local manufacturers,
Toshiba laptop battery manufacturers should pay attention to what?
Austria rattan: the key is clearly recognized that the chemical battery technology, the electronic circuit technology, if they do not adopt two technologies, will not be able to with ease.
For example, once the motor manufacturers to change the structure and change the configuration, electronic and technical personnel will be transferred to the battery manufacturing sector. While the technical staff will design the circuit, but it will not take safety measures. Because of the need to master the knowledge
PA3176U-1BRS battery , which will take time. Electronic technology is chemical-technical people to understand is not easy to train, able to grasp the comprehensive limited knowledge.
However, to understand the importance of cultivating a comprehensive talent not many operators. Originally, the power supply and battery is unpopular, it is not easy attention. Is easy to cost-cutting department. Therefore must pay attention to this point, but the operators do not know if this will be the development of the system and product problems.
Currently unable to display their talent in Japan and the battery power is a large number of the flow of technical personnel from overseas. I am worried that the future development of the capacity of batteries in Japan will decline.
I have often heard that the computer’s motherboard causing deterioration of the electrolytic capacitor product
PA3178U-1BRS battery ,
PA3191U-1BAS battery failure, electrolytic capacitors do not understand the knowledge, will determine the overall quality of different products. The same battery. I am a circuit technology staff, in fact, I have not personally been manufacturing lithium-ion rechargeable battery, but I am fortunate that the battery technology in many companies to help increase staff knowledge of the battery. Therefore, I am quite understanding of lithium-ion rechargeable battery and characteristics of the structure.
Q: What aspects of the industry system problem?
Austria Goto: issues such as security key is active in the industry as a whole share. For example, nickel-cadmium (NiCd) rechargeable batteries, if repeated shallow shallow place, the capacity will be reduced; lithium-ion
PA3191U-1BRS battery at full charge state and placed under high temperature will lead to deterioration, such as service life, these problems will take a lot of time to be product designers and users are well known.
Safety and risk-sharing if not, the consequences will be very serious. Battery design must therefore assume the responsibility to explain, manufacturers should also maintain a positive attitude to understand.
Recently, the world’s growing number of battery incidents. In Japan, organizations such as the battery industry every year in preparation for the development of safety standards, and many overseas companies are also no progress.
Some time ago, I observed the batteries
PA3191U-2BRS battery ,
PA3191U-3BRS battery overseas manufacturers, who were in poor conditions products. Even found that a mixture of cell debris. Japan need to lead the battery industry to improve the safety of overseas manufacturers.
Q: How should a young technical staff to increase capacity?
Austria rattan: fait accompli should abandon the concept as a concept to a new technical staff. How someone else how to do that on the technical staff did not previously been known as the Engineers (Engineer), and is known as the replacement of the division (Change-neer). Hope that still is an engineer and technical personnel.
From Japan to introduce new technologies, a large number of overseas manufacturers to redouble their efforts are. To promote basic research, the number of patent applications are also increasing.
While the
IBM laptop battery in Japan is still leading the field. Fear behind and actively develop and master new technology is also the champions of Japan. I hope the Japanese battery makers can continue to take the forefront in the world.