New Battery Choice

The cells together in series and parallel use, it sounds like a very simple, but follow a few simple rules, you can avoid unnecessary problems.

 

In the Laptop battery pack is the number of cells together, and obtains the required operating voltage. If you need greater capacity and higher currents, it is necessary to place the battery in parallel. There are also a number of battery packs, series and parallel of these two methods. A laptop battery may be four 3.6V Li-Ion batteries in the series together, the total voltage is 14.4 V and then the battery in parallel with two series together, so that the total capacity of battery can be increased from 2000 mAh to 4000 mAh. This access method called “two and four strings,” which means two of the four cells in series with all battery packs in parallel.

 

In watches, memory backup and used cellular phone, the general use of a battery. A nickel-based nominal voltage of the battery is 1.2 V alkaline batteries are 1.5V, battery silver oxide is 1.6V, lead acid battery is 2V, the lithium batteries is 3V, while the lithium-ion battery has a rated voltage of 3.6V. The use of lithium-ion polymer and other types of lithium batteries, its rated voltage of 3.7 V in general. If you want to be like the voltage 11.1V of this unusual, you should put 3 in series with the battery. With the technology of modern microelectronics, we already use a 3.6V lithium-ion batteries for cellular telephones and portable communications products with power supply with low power consumption. In the sixties of last century, according to meters in mercury batteries widely used because of environmental considerations, has now been completely off the market.

 

In nickel-based Dell Inspiron B120 battery nominal voltage of 1.2 V or 1.25 V. Between them, in addition to market preferences, there is no difference. Most commercial batteries, the battery voltage of 1.2V each section, industrial batteries, batteries and battery of military aerospace, the battery voltage of each section is still 1.25V.

 

Series

 

Devices require high power portable, it is generally provided by two or more batteries in series to battery. If you use high voltage batteries, drivers and switches can be very small. At an average price of tools for general use in industrial electrical voltage is 12V to 19.2V battery, while the use of battery power tools, high voltage 24V to 36V to get more great power. Automotive ultimately battery ignition starter voltage 12V (actually 14V) to 36V or even 42V. These cells are interconnected by a 18 composed of lead acid batteries. In the early hybrid vehicles, is used to power the battery voltage of 148V. The new models use batteries, voltage 450V to 500V, the majority of nickel-based battery chemistry. A pack voltage 480V nickel metal hydride battery is a 400-nickel metal hydride batteries in series. Some hybrid vehicles are also tested with lead acid batteries.

 

42 V car batteries are expensive and, compared to 12V Dell Inspiron B130 battery, it will produce more on the arc switch. Using the pack of high battery voltage caused by another problem is that there is likely to be encountered in a section of the battery inside the battery failures. It’s like a chain in series with the battery more this happens, the greater the chance. As long as a problem of battery, its voltage is reduced. Ultimately, a “mismatch” of the battery may be interrupted current delivery. Will replace the “bad” battery is not an easy task, because the new battery is old and not another. In general, the capacity of the battery is much higher than the old battery.

 

Look at an example of the battery, Article III of the battery voltage of only 0.6V instead of 1.2V normal (Figure 1). As the voltage drop operation, it is faster than the normal end of battery discharge from the critical point to achieve the same time, it significantly reduces the use of time. Once the device off because of low supply voltage, the other three are still intact battery stored electricity can be sent. Then, the cells of Section III also showed a high resistance, so this time also with the load, then lead the entire chain, the output voltage of the battery significantly in the fall. In a group of cells in series, poor battery performance, like a pipe plug to plug, have an enormous resistance to stop the flow in the past. Section III short-circuit the battery, thereby allowing the voltage down to 3.6V, or to disconnect the battery and cut the link in progress. The performance of a Dell Latitude D410 battery depends on the worst part of the battery inside the battery performance.

 

Parallel

 

To get more power, you can put two or more batteries together in parallel. In addition to the battery set in parallel, another approach is to use the larger battery. Because of restrictions can choose to use the battery, this approach does not apply in all cases. In addition, the large size of the battery is not made of special batteries needed for the form factor. Most batteries are chemical

 

Can be used in parallel, while the lithium-ion batteries in parallel using the most appropriate. Formed by the four-cell battery packs in parallel, the voltage maintained at 1.2 V, while the current and performance has been increased four times.

 

Instances of the battery and battery in series with the parallel circuit the battery, high impedance or “open” little effect on the battery, but the batteries in parallel will reduce the load capacity and shorten the length of the film. It’s like a three-cylinder engine is just starting. The damage caused by a short circuit will be greater, because, in short, the failure of the Dell Latitude D500 battery will quickly run out of battery other within the power, and cause a fire (Figure 2).

 

Series-parallel

 

The use of such a series of parallel connection method, the design is flexible, you can use a standard battery size to achieve the required nominal voltage and current (Figure 3). Note: The total power of the battery will not change the different connection methods. The power is equal to voltage multiplied by the current.

 

Pairs of lithium-ion batteries, the series parallel connection method are frequent. The most common type of battery is 18650 (with a diameter of 18mm, length 650mm). It is equipped with protection circuits that monitor the whole series, each section of the battery, and thus its practical maximum voltage of 14.4 V. This protection circuit can also be used to monitor each section in parallel with the battery status.

 

Household batteries

 

Speaking earlier, the Dell Latitude D505 battery serial and parallel connection method for the rechargeable battery, the battery pack inside the battery is permanently welded together. In addition to several battery cells used in the battery room, all in series outside of the rules mentioned above apply equally to domestic battery. By implementing a few batteries in series when used, must conform to the following basic requirements:

 

● To keep the battery connections clean. Up to four batteries in series when used in a total of eight connection points (the battery in the hall of the battery connection point, the battery room to the next section, the connection points of the battery). Each connection point is that there is some resistance, if the additional connection points, which may affect the overall performance of the battery.

 

● Do not mix batteries. When the battery is low, replace all batteries. When used in tandem, using the same type of battery.

 

● Do not recharge non-rechargeable batteries. Right to charge non-rechargeable batteries, it will produce hydrogen, which may cause an explosion.

 

● must pay attention to VGP-BPS10 battery polarity. If you have installed a battery anti-polarity, and will reduce a range of battery voltage, rather than the voltage increases.

 

● End of the already fully discharge the battery from the electrical equipment used to remove suspended. Comparison of old batteries prone to leaks and corrosion situation. Alkaline batteries instead of carbon zinc batteries, the problem is not so serious.

 

● Do not put the batteries are placed in a box, so that short-circuits may occur. Battery short circuit can cause fever, and cause a fire. Please waste battery on plastic bags, insulated with the outside world.

 

● similar to the original batteries alkaline batteries can be thrown into rubbish bins. But the best is to send used batteries in recycling operations.

Sulfur battery sodium is the United States Ford (Ford) was invented in 1967, the company announced today, only about 40 years. The battery is usually caused by the cathode, anode, electrolyte, membrane and shell, etc. parts. Conventional rechargeable batteries such as lead acid batteries, nickel-cadmium batteries with electrodes and solid electrolyte composed of liquid sulfur Laptop battery sodium is, however, is the electrode of the liquid composition liquid electrolyte and solid, the composition of its negative activity equipment is sodium molten metal, the cathode active material is molten sulfur and sodium polysulfide, because sulfur is an insulator, so sulfur is usually filled with the porous conductive carbon or graphite felt, the solid electrolyte and a conductive membrane is a specialized sodium ions are known as the envelope of Al2O3 ceramic materials are usually stainless steel and other metallic materials.

 

Sulfur battery sodium has many functions: An office of the specific energy (eg, per unit mass or volume of cells have the power valid) high. The theoretical specific energy of 760Wh/Kg actually more 100Wh/Kg is a lead-acid batteries 3-4 times, the other is high current discharge, high power. The current density of discharge is usually up 200-300mA/cm2, and the instantaneous time can be three times the release of its inherent energy, another is the charge-discharge efficiency. Following the solid electrolyte, so there is no liquid electrolyte secondary battery is usually the kind of self-discharge and side effects, charge-discharge current efficiency is practically 100%. Of course, things are always divided into two, sulfur and sodium batteries are also weak, its operating temperature to 300-350 ℃, therefore, the Dell Inspiron B120 battery needs some work, heating insulation. However, high-performance vacuum insulation and thermal insulation technology, which can effectively solve this problem.

 

Power of sodium sulfur batteries as a new family of chemicals, the emergence of a new member, has been in many countries around the world, much attention and development. As the sulfur battery sodium has a range of attractive features of high-energy batteries, so a start on the first of a number of countries are engaged in the development of electric vehicles used as traction batteries, also made very encouraging results, but with the passage of time has shown that sodium sulfur batteries in a mobile situation (eg electric vehicles) to use the conditions are difficult, whether using the space, safety of the battery itself, so there is a certain limit. Therefore, in the late 80s and early 90s, the foreign accent on the development of sulfur battery sodium opportunities as fixed (such as storage of electrical energy) applications, and more to demonstrate its superiority. As Japan and Tokyo Electric Power Company (TEPCO) and NGK companies to develop batteries that sodium sulfur battery energy storage, its demands for electric power upgrade charge (it ie, from Clipping Pinggu role will be night, excess electricity is stored in the hp F4809A battery inside, day with the peak power, then released from the battery), UPS and emergency power compensation of instantaneous power, etc., and in 2002 entered the marketing stage of implementation, has become the largest (8 MW) batteries sodium sulfur storage devices, energy from 2005 years during October statistics, annual production capacity of sodium sulfur battery batteries on 100MW, while beginning to export abroad.

 

Sodium sulfur battery

 

The sodium-sulfur batteries are generally optimistic about the recent battery electric vehicles Bodhisattva, the United States Ford Motor Company Mnivan electric vehicles is the use of sodium-sulfur batteries. It was the United States Advanced Battery Consortium (USMABC) as a medium-term development of sony VGP-BPS2A battery electric vehicles, produced by ABB, Germany B240K sodium-sulfur battery type, quality of 17.5 kg capacity building 19.2Kw/h; Energy 109Wm/kg, life cycle 1200 times, the test loading of the best penalty-wheel car free 2300 km.

 

Travel boosts the energy of a sodium sulfur battery involving new energy battery power sodium sulfur. For existing driving-acid batteries, nickel cadmium, heavy volume, discharge time is short, continuous, limited to starting, lighting, experimental, short-run use of electric vehicles insufficient to provide the same sort of weight of lead acid batteries can produce 15 times more power, discharge continues for a long period to track their own supplement a sodium-sulfur batteries, and its ultimate goal is to replace the existing Travel kinetic energy, and d ‘ other electric motors, a new impulse to the battery power sodium sulfur. The technology options are: 1, insulation tube, 2, vacuum chamber, 3, body shell 4, the intermediate tank, 5 hole complicity, 6, cord heating, 7 plates of electrodes, 8, temperature controller, 9, sodium, 10, insulation materials, 11, electrolyte 12, sodium sulfide, 13 heaters, 14, thermometer, 15, Supplement electrolyte tube, 16, cord heating, 17, heating wire, 18, and the inner tank.

Developments of solar batteries are two key questions are: To improve conversion efficiency and reduce costs. Amorphous batteries thin film silicon solar due to low cost, ease of mass production, widespread attention has been paid, and rapid development, in fact, from the 70 early, Carlson, etc. had already started working on development of amorphous silicon batteries, the last few years of development work has been a rapid development has been the world there are many companies in the production of types of Laptop battery products.

 

Amorphous silicon material, like a good stack of materials, but because of its optical band of 1.7eV, makes the material itself on the solar spectrum is not sensitive to the region of large wavelengths, such action would limit the batteries amorphous silicon solar conversion efficiency. In addition, its optical efficiency will be an extension of time as the light attenuation, light-induced recession in the so-called SW effect, makes the performance of the stack unstable. To solve these problems is the preparation of this track in tandem solar batteries, tandem solar batteries prepared by p, i, n-battery single-layer junction solar re-deposition of one or more sub-Pin battery system to find. Improving the conversion efficiency of solar batteries in tandem to address the stability of single-junction batteries are not the key question is: ① It is The Gap Band of the material in different branches with Taiwan to improve the range of response spectrum ; ② the first Dell Inspiron B120 battery i-layer thin, light produced little change in the intensity of the electric field to provide the i-layer of photogene rated carriers out; ③ generated by the end of the support of the battery is about half of the battery, the light-induced recoil of small batteries; ④ stacked solar each sub – battery is connected in series.

 

Preparation of thin film amorphous silicon solar batteries there are many ways, including reactive sputtering, PECVD method, LPCVD Act, the reaction gas as raw H2 diluted SiH4, the substrates are mainly glass and stainless steel in amorphous silicon thin-film batteries by different processes can be obtained separately from single-battery junction batteries and solar laminates. The study of solar batteries in amorphous silicon is currently implementing two major advances: first, the three layered structure of amorphous silicon, the conversion efficiency of solar batteries by 13%, setting a new record, on the other. Three years laminates production capacity of solar batteries to 5 MW. United Solar Energy Corporation (VSSC) has obtained the highest efficiency single hp F2024B battery junction solar conversion of 9.3%, three band-gap 3 maximum conversion efficiency of the battery stack is 13%, see Table 1

 

The maximum conversion efficiency is a small area (0.25cm2) battery reached. There have been reported in the literature single junction silicon battery efficiency amorphous solar conversion of more than 12.5%, Japan at the adoption of the Academia Sinica in a series of new measurements of silicon amorphous battery efficiency of conversion of 13.2%. UN amorphous silicon, solar battery thin film stacked in particular, the study is not much, Nankai University, Xinhua Geng, using industrial materials to the aluminum rear electrodes were prepared by a zone 20X20cm2 of the conversion efficiency of 8.28% of the a – SI / A-Si tandem solar battery.

 

Solar batteries using amorphous silicon with high conversion efficiency and low cost and light weight, has great potential. But stability is not high because of its direct impact on its practical application. If we can better solve the problems of stability and improve conversion rates, the battery of the sun can be amorphous silicon solar is undoubtedly the main development products.