Latitude D600

On the nickel metal hydride batteries in electric aircraft model

Posted by admin on December 23, 2009
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In recent years, the activities of model airplanes, thoroughly with the popularity of the dynamic model aircraft have become more demanding. That the convenience of electric start model aircraft, but also pollution-free, easy to use, more and more fans of model airplanes, and there are many projects have been included in international competition. The world’s four major hot spots of electricity to any of the products of nickel-hydride batteries in metal in its own unique advantage to become the main choice of the power of Airbus.

 

The characteristics of Ni-MH battery Ni-MH battery is the hydrogen in the study prepared on the basis of a new type of energy. It uses a new type of cathode materials, and compared to nickel-cadmium batteries has the following advantages:

 

Above the energy of the same type Ni-MH battery that the battery capacity nickel-steel capacity 1.5-2 times high as the AA-size batteries, nickel steel is generally ap-800 milliamps, while the nickel-hydride batteries, metal may reach 1000 – 1500 milliampere hours.

 

No memory effect so-called memory effect refers to the portion of the discharge of the battery nickel steel, as if “remember” In the past, there is no end of electrical discharge when the battery reaches the discharge point, the tension of a permanent decline, while remaining within the capacity of the battery with the charging time increased so that the actual availability of electricity gradually reduced, so that devices Electrical work correctly. Ni-MH Dell Latitude D510 battery without memory effect, each time after use, regardless of days without discharge of residual charge may be payable directly.

 

Pollution due to nickel-hydride batteries contain metals cadmium, lead, mercury and other metals, it produces no pollution of the steel on the human body and environment are sound, called “green batteries. ”

 

Quick charge and discharge because of the benefits unique internal Ni-MH battery itself has a heavy load of excellent results and current discharge and cycle life can reach more than 510 times.

 

Operating voltage of the battery in the 1.2-1.3V operating voltage between the batteries and nickel-fu the same, do not need to change the design of electrical origin, you can replace nickel-cadmium batteries.

 

Therefore, nickel-hydride batteries, metal can be widely used not only for electronic equipment, instruments and meters, power tools, scooters, and communications equipment, but also for electric model aircraft, and the more we can say superior performance. The current nickel-metal hydride batteries are A, AA, AAA, SC models.

 

Electric model airplane purchased for the performance of the Dell Latitude D520 battery electric model aircraft is currently used in electric motors are DC permanent magnet motor. Its high speed, no load speed of 10,000 rpm or more, the current work is great. Figure 1 is the text of this motor characteristic curve of a typical IQ. Of the IQ curve can be seen with the Q value increases gradually, I straight up, therefore, the performance requirements of batteries are very strict, mainly in the following points:

 

1. The power density to be great is the instantaneous discharge performance is better. No significant drop in output voltage in conditions show more effect of the current ideal, which requires the battery internal resistance should be particularly low. Figure 2 Equivalent circuit for the battery circuit. As shown on the graph: the door) engine operating current l = E / R + Zn is not only limited by their resistance, but also, and the battery internal resistance r is closely related. Part of the internal resistance R of the electrical energy will be consumed into heat, causing the battery internal heat. (2) Lots of engine operating voltage. E-Ir, Ir fall When asked to output current is high (eg, motor 540 is internal resistance of 0.5 ohms, while the AA type Ni-MH Dell Latitude D600 battery internal resistance is generally more 10 cents to 30 cents between the European Union) battery internal resistance will not be ignored. For the electric model aircraft is, we try to use a small internal resistance of batteries, in order to facilitate urgent to improve the performance of discharge.

 

2. The energy density is higher. The density of the so-called energy refers to the unit mass of the battery capacity, with the mAh / g or Ah / kg representation, it is an important parameter for measuring the battery, the same weight capacity of the battery the more the better. For the model airplane for the airplane, although the weight of the power, but power was significantly increased on the other hand, can get the same amount of power, but reduce the weight of the model plane has greatly improved the power and performance of flight.

 

3. High capacity load current is better. For fans of model airplanes, the flight environment is often in the wild, their equipment and time are very limited, requiring the battery in a short period of time to add capacity, c That is what we call the crisis capacity. As the nickel-metal hydride power He has no memory effect, unlike nickel-tin batteries do not need to “put enough net” and may therefore be at the controls of a cycle without charge current IC discharge may be made to supplement the power. In addition, it should be good over-charging and over-discharge capacity, self-discharge rate is lower. The Dell Latitude D610 battery capacity of each combined cell resistance internal self-discharge, temperature and other properties must be strictly in line to achieve the best results.

 

China Ni-MH battery state of current world production of nickel-metal hydride batteries mainly by the Japanese monopoly. China in the early eighties to begin production in 1996, total production of about 30 million, and foreign products less capacity, ICLL% DOD cycle charge and discharge at least 500 times the rate of uniformity of products is poor, is not conducive to the combination of higher prices. However, since 1997, some local manufacturers to produce a nickel-hydride power metal to greatly improve quality, such as rare earth Jining wide, Zhuhai and if the battery company with Professor Wang Jisan invention “that the penetration electrode technology “production of nickel-metal hydride batteries, electric model aircraft flying tests, the effect is ideal. Test models used for the modification of P3A plus imports of 05 engines. Impeller for D180, Model H120, a takeoff weight of 1,000 grams, the Dell Latitude D620 battery voltage is 7. ZV. Based on test data to see AA-capacity battery type has reached 1400-1500 mA, resistance to an average of 15-18 cents in Europe, self-discharge of less than 15% weight 25 grams, the cost reduced by 30%, selling prices and steel battery Nickel was near. This amateur model aircraft, which proved to be a good news, but to replace the nickel-steel cell is a solid foundation.

 

Ni-MH battery and maintenance 1. Nickel-metal hydride batteries used currently, there are three main methods of charging, fast charging, load push standard slow charge. Charging time and current charge may refer to following table:

 

Table C for the nominal capacity of the battery mAh; I for the charge mA, T for hours charging time. Standard generally constant load current, constant voltage, the load pulse wave. Most of the rectifier 10 is currently commercially available current-limiting device means simple pieces of nickel charger. A proposed self-television company D adjustable mA constant current source for nickel-hydride batteries in metal. Depending on the size of current selection, charging time: T = 1.4-1.5) C / I calculation. In addition, the absence of exceptional circumstances, is generally not used for more urgent IC load current from the Laptop battery to prevent excessive internal pressure increases, causing a leak, damage to the battery.

 

2 Ni-MH battery car, the discharge capacity of large, non-use of electricity must first be laid off after the store, and the standard charge and discharge every six months once.

 

3. Under normal circumstances, the battery and the discharge time up to 500 times or more, with the increase in charge-discharge capacity will decrease, resistance increases, the capacity utilization of a year carry out inspections to prevent overcharging and over discharging. 4. Remove the battery should be stored long-term need.

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About the lithium-ion battery charge and discharge

Posted by admin on December 14, 2009
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The phone is the original application of rechargeable lithium-ion battery

Lithium-ion battery applications, speak a total of three points.

 

1 as it is, even for charging battery

The West in the application of lithium batteries should be aware that the Laptop battery set aside some time before retirement under conditions of sleep Qi, this time in the value of the mass deformed dwarf tolerance expansion, the use of a lack of effort has also been. However, lithium batteries is very easy to activate, and only 3-5 times through the cycle of abnormal electrical charge set to activate or not the drums, the enhancement of quality can often wrong. Because the characteristics of its lithium-Similarly, the resolution recalls that it is simply not forgetting effect. And therefore, it is outside of the phone user of lithium in the activation process in the west do not need a special way of non-combat equipment. Under the practice, not only is the case, the main wo everyone to watch the real from the start by taking a measure of the approach load type from “artificial activation” method is the worst.

 

Lithium batteries, “activation” in response, the proliferation of theory is: something must be charging more than 12 hours, repeated three times in order to activate the battery. This “The first three load for more than 12 hours old,” say, indicate that the main nickel battery (such as nickel cadmium, war nickel-metal hydride) consecutive stops to display. Therefore, this argument can say is the beginning of miscommunication. Lithium batteries and charge the IBM ThinkPad R50 battery nickel took no abnormal electrical characteristics of a small difference, but also to understand what Ono incomparable wo have access to the entire back of the power of evil-type materials skills are too low stressed the accusation to be false son with lithium, in particular liquid lithium-ion battery system for the damage lost ambitious. Therefore, the pricing at the worst time in accordance with the rules and standards so as to pricing, special is not to retreat only when more than 12 major costs of super-young. Typically, the mobile phone to clarify the capacity of the book under the first approach is the appropriate measure of time that the mobile phone charging step.

 

Present, the cell phone battery lithium battery or charger until the battery is fully charged to take the initiative to stop and there is no electricity nickel charger for 10 consecutive issues of the so-called big time “Juan” responsible source. In other words, if your soap lithium batteries in all of the first, on the charger is also sufficient. Let everyone powerless to protect the rechargeable battery power to maintain characteristics of the rest of the circuit will never change the quality of the hand after the other, so your batteries will Anyi beside a small period of indecision. This is another reason to support the charge consumption.

 

Present on some phones, the charge must be the work of more than the first, following wrong with the charger, when not only the end of the charging system will also open the landfill – Cycle load. Might such an approach has its own objectives from the manufacturers, but apparently the Dell Latitude D600 battery and cell phone / charger is not in terms of victims of life expectancy. Where different, less load is required to eliminate the time and the need to enter the day only, and my power grid report to see the situation, most of the premises during the day are comparable to a high voltage, but less stable. Behind once said that the lithium battery cheap is very delicate, and the electric charge of nickel-linked dot Seakeeping static worst loss of more than ability and therefore he affixes the Anyi.

 

This period can not neglect the other is the lithium battery in a dot Strange has also been linked inadequate electricity, power amplifier power lithium batteries have also been very kind of injury. She cited above did not respond.

 

2, when the strain should be grateful to the early use of external charging

Let the forum in another, often in a position to consider this argument, because the number of non-electric charge infinite series, it should be whether the phone can be used to recharge the hp HSTNN-lB31 battery light. But woe to find a closed-in rechargeable lithium ion battery electric lift table test cycle for the lifecycle of data columns do not stop:

Cycle (lifetime 10% DOD):> 1000 times

Cycle (lifetime 100% DOD):> 200 times

 

DOD is taking power away from Leonard bulge shallow writing. West can look in the main draw, while the number of dependent household War shallow power has nothing to do, 10% DOD cycle life when the DOD 100% is much to be young. Redeem ran after the charging off in the theory of absolute total capacity: 10% * 1000 = 100100 * 200% = 200, the first for a complete electric charge carried by the analogy worse for some, but network behind this assertion must be a friend to make some changes: If distorted stop or should not be the remains of days depending on the battery power runs out, then filling the criteria of quality care, but if the battery OR you estimate that the first two are unlikely to maintain the land, when all the soap, they must quickly start charging, it ran into the charger that you’re willing to do if the matter private room, they must be different.

 

And you need to recharge with a summary will soon get to a charge of communication lead to a time when major events, even if the sony VGP-BPS2A battery is no surplus power, the load if you just charge forward, Due to the loss of Ni is not pseudo-evil, “a sub” – life cycle, as non-”0.x” Sometimes, it fills back to back that x is very old.

 

The residual power from the battery runs out the criteria is not charging you the most. And lesser charge, like a wide spread of a saying that “as far as possible the cell phone battery power runs out, the machine most active closing used NAO.” This is really a nickel their practical purpose is to prevent oblivion Yi effect, and the poor, it is also the source of transmission of the lithium Xi. Already the battery of my cell phone too low due to the opinion before the charge was not always used in the continued use of such arrest initiative. The outcome of this case, cell phone charging and Kai in the first machine reflected without losing inspection in customer service is not welcome. Because the discharge of the battery voltage caused a modest result, too low, and even lack the abnormal condition of the charging system harmony of the machine defeated.

 

3, the exact wrong approach to Li-ion cell phone battery

Summarized Hul go, wo evil in the use of lithium batteries in the rechargeable cell phone electric response recall the more important to take are:

1, in accordance with the standards and procedures, charging time, even if the first three have such a withdrawal only;

2, should be present when the power of the battery cell phone low point, it should be possible for the initial pricing Xie;

3 lithium batteries do not need to activate the special problems in applications of mobile activation of lithium batteries will be artificial baby stores Yueyou pregnancy. If you insist to use through the dissemination of “three previous seasons Big 12 activated when the load of the consumer” approach, in theory, there will be no consequences.

 

Thus, all attempts to find 12 old and young, when ultra-Li-Ion battery charger for mobile phone with the closing machine used in active practice, are both at fault. If not used to being dried in accordance with claim problems, please promptly corrected, Xing Xu at the moment, at the latest.

It should be in cell phones and chargers to maintain and dominate the circuit itself, good quality, where high NAO, the lithium apple A1079 battery cover there is a phase through the purchase guaranteed. Therefore, the burden is to understand the rules, Shen-point, under certain conditions is also capable of doing without some form of compromise. For example, you invented in your cell phone before going to sleep the day required lifting night, you can also grateful to the start of charging before going to bed. A crucial issue is that you need to know precisely what the practice, and if not deliberately dry by mistake.

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