digital batteries

Lithium-ion rechargeable battery of the 20th century, early 90s has been officially practice in less than 20 years, the ability of a rapid increase in the rapidly growing market. It is estimated that in the future be extended to the use of electric vehicles and portable power environmentally friendly storage and other areas.

Lithium-ion rechargeable Laptop battery status and challenges and future directions of development of an interview with the practical stage for many years before the study in the development, known as the father of lithium Parents Chief Executive of Sony, Executive Director of the Spanish-American thread. (Interviewer: Security Hideo)

Q: Lithium-ion rechargeable batteries are used to expand the way up?

West: 90 years in the 20th century, the import issue, we once made home video cameras, and MD players, AV products such as the application of lithium-ion rechargeable battery goal. But this time a very small production alone can fully satisfy the market simply did not anticipate that the IBM ThinkPad T40 battery will become consumer products.

However, soon begin using lithium-ion laptop battery, this market began to grow rapidly. We learn that at that time played a computer makers “from New York to Los Angeles route five hours without charges,” the ads have played an important role. Another period of universal prosperity and promoting the development of lithium-ion rechargeable batteries for notebook computers, and cell phone.

In the 21st century, lithium-ion batteries has begun to have digital cameras, power tools (PowerTool) and game consoles such as adoption. The face of the building society low-carbon future requirements in the time it is estimated will use in future hybrid vehicles, electric vehicles, industrial and domestic fixed power expansion.

Lithium-ion rechargeable Dell Inspiron E1705 battery with technological development, its energy density is increasing each year. To ensure safety measures can be combined. These measures have contributed to market expansion.

Q: To improve the energy density is the key to what? Energy density of the future will be raised?

West: to improve the energy density of batteries, there are two ways. Firstly, to produce electricity without reducing the contribution of the Ministry of material, such as thinning of positive and negative electrodes of the collector body and the diaphragm to reduce the binder and conductive auxiliary material. In short, through the battery designed to improve. But the limits of this approach.

Another method is to increase the active electrode (positive and negative) of the unit of weight or capacity per unit volume. The material development has long been underway. LiCoO2 cathode of lithium-ion rechargeable hp PP2182D battery early start to close at nearly the theoretical limit of the ability to use, totally dependent on improving the performance capacity of the battery anode.

For example, the initial negative lithium-ion rechargeable battery using carbon (coke), its capacity 250mAh / g around the initial charge, discharge efficiency, but about 80%. And now, the negative carbon (graphite) the ability to infinitely close to the theoretical capacity of 372mAh / g, the initial efficiency of over 95%. The energy density, respectively, in the 200Wh/kg early 80Wh/kg to 600Wh/kg present 220Wh/kg.

However, the negative carbon (graphite) under the condition of the sony VGP-BPS2A battery capacity has now almost reached the theoretical limit, it is imperative that the development of a new generation of negative. Other material of tin (Sn) and silicon (Si), the old theory, three times the capacity of graphite, which is 10 times higher than in graphite.

On the other hand, the cathode material in terms of capacity and basic living is not progress. Capacity larger than LiCoO2 cathode are LiNiO2 is expected at the cathode is increased by 10 ~ 20%. However, LiNiO2 the issue of security is very broad, is virtually useless.

Recently, some products are used in lithium-ion battery voltage toshiba PA3399U-1BAS battery to 4.2 V or more, such as 4.4V, the value of discharge current is the same as the energy capacity (Wh) increase cathode material.

As indicated above, at least in terms of negative from the material capacity is correct.

Q: To improve the energy density, should pay attention to what is the problem?

West: using demand side is not necessarily limited to capacity. Emphasis on output characteristics of certain purposes, such as power tools, while the satellite with the auxiliary power focused on the characteristics of the cycle. Sometimes requires cycles to reach 15 million times, far more than the apple iBook G4 12 inch battery from the computer.

Must take to meet the above requirements of materials and design methods. Of course, all properties have excellent battery is nonexistent. The emphasis on performance, depending on what is to decide what battery to use materials and adopt design.

And, not only to meet these multiple requirements, the safety of this important and indispensable element should be compliance. Consequently, the resulting safety factors must be considered and what is the nature of matter and how to develop materials to reduce these factors.

For example, if, as mentioned above, to SI as a negative, the negative capacity of carbon materials can reach more than 10 times, but also consider other features (such as load characteristics and the characteristics of cycle) and security. In addition, if we adopt the SI followed the cathode material of origin in order to maintain a balance with the negative, positive living matter worth increased to 10 times the thickness of coating. But in fact it is not possible.

Given this, only individual to improve the negative, not to improve the characteristics of the TravelMate 290 battery itself, but also need to re-consider the positive electrode, electrolyte and separator and all other materials.

Finally, to ensure the security problems faced by developers face. Top of battery power is sealed in a narrow space limitations. And use a bit of a slow release of energy. Sometimes, however, for some reason, a sudden release of energy. Cause an accident.

Devoting more resources to the energy released could be higher, thus a higher risk. Therefore, the higher the energy density, safety measures, the most important.

Increasing the energy capacity, with the corresponding security VGP-BPS2B measures essential for development.

Q: What are the essential safety measures?

West: As already mentioned, due to higher energy density, the greater the risk, so that security issues more important.

No single cause of the accident. Need to understand the positive active material, negative active material, electrolyte, separator and a satchel and all others in the process of loading and unloading of the moving mechanism and its impact safety.

Recently, the cost of increased competition, the technical side and the seller proposed to reduce the cost of production sites have become more demanding. Although you may think replaced by cheaper materials and shorten the manufacturing cycle and other methods, but the technical aspects to take into account those pairs of Dell 6Y270 battery performance, particularly in security, the impact for the maintenance of a place can not make concessions attitude.

On the other hand, the concern is not without the aid of the party not in compliance with the design of the battery using the designated location request. I also heard that because of the construction machine side strongly demands for fast, its temptations, the charging voltage is designed to limit the phenomenon of over 4.2 V is also beginning to emerge.

In the lithium-ion rechargeable battery run time, the battery technicians and sales personnel to use the side with an introduction to the technical team, clearly tell everyone what to do and not do. Now, sales are run by companies, fewer and fewer such scenes.

Q: How to improve the resistance of young technical staff?

West: Lithium-ion rechargeable hp 367759-001 battery with the original battery is different from other chemicals, non-electric material elements of knowledge but also wide. These include organic chemistry (electrolyte, binder, diaphragm), polymer chemistry (divide, linking, gel electrolyte), metal (positive and negative collecting agency), ceramic (positive living material), the carbon materials (anode), etc..

In addition, lithium-ion rechargeable toshiba PA3534U-1BRS battery applications wide range of fields, use the method (charge and discharge conditions) are also diverse, so also need to understand the application of the machine a little. Therefore, can not lock us in “I’m positive expert, a narrow zone. In command of a wide range of knowledge (even if you can sit in the cars), then, should be established areas of expertise.

Q: Could you tell us about the problems of system management.

West: I hope that manufacturers of batteries, remember that more attention should be given regarding the cost principles of quality and safety. Otherwise, no matter how to improve the energy density and output characteristics, eventually becoming a mirage.

You want to use lithium-ion rechargeable batteries and battery production in the exchange of technical personnel to go to learn more about lithium-ion rechargeable apple PowerBook G4 15 inch battery is used. Of course, this issue is not only machine, hand building, the designer of the battery must also pay attention.

The battery of multi-buyers wondered why the battery of my old? After reading the contents of one would understand that we must understand why the capacity of the battery down? “The reasons for the decline in capacity, and why?” “The battery internal resistance will affect the capacity?” We then explain in details.

Laptop battery capacity after repeated loading secondary discharge will decline, its causes are complex and diverse, not only after repeated accusation, the discharge capacity will decrease, even long not to use, have the same problem of declining hardware capacity, rather than the charge and repeated the battery is discharged more easily damaged, because the battery is the use of chemicals from the chemical energy into electrical energy products, chemicals to maintain their regular activity and only less than a deterioration of failure, when the original activity of two compounds role of the end or nearly out of season, and will not be able to perform chemical reactions, this time the decrease battery capacity, that is, the cells are already gone, the battery must declare died.

Volume decline over time tends to happen when?

A good quality of the secondary battery, the continuous load and discharge over 500 times the capacity can reach over 70% even higher, but the decay rate of the IBM FRU 92P1141 battery capacity, plus good or bad depends on the battery cell, based on the battery yet to match the user the use, storage, temperature, remarkable degrees to prolong battery life.

Indeed, although marked as secondary batteries can be reused, but he still has his life there, so laptop battery, for example, the ability to label 4000MAH, but after the charge and discharge its capacity will be successively reduced by one year after the building are more likely to fall into the 3300mAh below, it is a normal phenomenon of secondary batteries, but can also see this problem is actually continues until that the battery technology, the use of both the meaning of love using a usually short period of time, and when using the battery Time is Running Free When this time to replace the battery.

What is a voltage difference?

Many Li-degradation capacity of ion Dell U4873 battery or failure due to a series within the battery due to voltage difference generated, resulting in cell battery produced the gap between tension can be avoided, because each battery string of battery cells nature can not be exactly the same, with a long time, there are some features of the natural and poor battery before aging, affecting the curve general discharge. It is with gratitude that the aging cell batteries have been the first full charge and discharge has also finished first place, but this time the ability of cells to the other battery is not fully utilized exhausted.

For example: load, others charge the battery kernel boot approaching saturation when the voltage is 4.2 V, while the aging of the battery cell may have been grateful to 4.3 V or a voltage even higher, causing an overload of electrical cords and other costs dissatisfied; discharge, when the strings are always large voltage range of work that is already grateful old battery or battery is already below the normal operating voltage , 3.0V, resulting in a unique string of low voltage protection, forming the hp PP2182D battery to discharge faster.

What is battery aging?

The aging self-styled drums, which, as the increased frequency of use and time, or long-term investment, leading to the capacity of the storage battery, the progressive deterioration, when battery is only one, the batteries, they will build the capacity reduction, while the group of battery Multi-core set-batteries in parallel, they generate all the associated voltage difference, this time the user is most likely aware, the battery is also clearly shown that over 50%, how suddenly dropped below 10%, and even non – normal shutdown, resulting from the use of time, simply said: 『aging the battery is a decrease in battery capacity 』.

Aging of the battery cell internal battery do what needs to be changed?

The aging batteries, the most frequently observed is the easiest to detect is the change in resistance, the internal resistance of the sony VGP-BPS2 battery when the nucleus is very small factory, but the charge and discharge over a long period, because of electrolyte in the battery, and a swimming pool in electronic activity of chemicals in the lower internal resistance of the whole because of increased electrolyte will gradually repeated load variability of discharge, the resistance will continue increase until the resistance as large as the power of the internal battery is not properly released, a common phenomenon is the mouth of the battery, this time, the battery is the so-called aging and capacity battery will decrease with respect, most of the aging of the battery is because the resistance has been caused in the cause can not be used.

Change of battery internal resistance include the following:

Changes in the cathode materials

The molecular structure of the battery, the positive and negative electrodes can hold rainfall on the hole structure of chemical molecules will gradually with the number of loading and unloading of collapse. Blocking, which is positive and negative active materials, passive, there may even be negative materials are polarized phenomenon, reduces the toshiba PA3383U-1BRS battery charge-discharge process can be free to move the number of ions.

Catalyst for Change

A catalytic role in the molecular structure of the catalyst, due to temperature, humidity, storage time, gradually changing its structure and nature of the final can not be catalytic.

Electrolyte metamorphic

Electrolyte because of the battery after charging and discharging several times, but it was bad, and even the loss, the low quality of basic battery is easier because the composition of the electrolyte under the control of undesirable while the faster deterioration.

Conclusion:

Again, the apple A1185 battery itself as a kind of oral consumption, with the increase in the number used in the battery charge storage capacity, the successive reduction of life cycle support of about 500 times more than the estimates of the time, if the first few days of use, between about 1-2 years we should move to a new battery a.

But for the laptop. The battery is expensive consumables, many people would say that I try to use less battery, or simply do not need batteries, so there is no life cycle of battery problem, but in fact, a This concept is not always the case is correct, the number of batteries affect the battery life conditions, but not the key, because, as mentioned in this article, the battery’s chemical energy of products will evolve with the passage of time, but to reduce its activity, stood not the same because of self-discharge and lead to an excessive discharge, and loss of activity and damage to the canal, so carefully When you pay attention to your battery at the same time, remember the proper use of batteries, but also the Aspire 3000 battery charge and discharge on a regular basis, so your battery to play a greater efficiency.