Laptop Battery Talk

According to the U.S. “Science Daily” website July 6, German scientists have developed a printing method can produce high-performance batteries(gd761,kd476), it is not only cheap, but small form factor, the thickness of less than 1 mm, weighs less than 1 grams.

A long period of time the battery has always been cumbersome. Now, this new type of ultra-thin batteries will lead to a revolution in the field of the battery. The researchers through the use of nanotechnology will be common lithium-ion battery narrow and close to a cellulose paper. It is the thickness of less than 1 mm, weighs less than one gram, but also as the print newspaper as “Printing” batteries, cheap to mass produce high-performance batteries.Dell insprion E1705 battery,inspiron e1505 battery

Past, whether it is withdrawal or transfer, must personally go to a trip Bank, the Department will get back a finished article bank statement. Today, the banking transactions can be easily at home, but still need to telephone or network support. With ultra-thin printed battery, in the future will use bank cards become more convenient, the user holding a bank ATM card, touch a few, the card will be displayed on a comprehensive consumer information bank card.

Germany Chemnitz Cifu Lao Enghoff Institute Reinhard Baumann (Reinhard Baumann) professor and co-workers Menippos formed a research group developed this battery. Bowman said: “Our goal is to be able to cost-effectively mass produce the batteries(powerbook g4 battery), the cost is best cents per.”

Printable batteries and regular batteries are very different . Because it is placed on the balance that less than 1 gram, less than 1 mm thick, so it can be embedded in bank cards. Batteries do not contain mercury, an environmentally friendly way. The voltage of 1.5 volts, is a normal voltage range. Can be stacked together to improve the battery voltage, to be 3 V, 4.5 V and 6-volt batteries to provide power for any electronic product. This new battery composed of different levels: Zinc anode and cathode such as manganese. Zinc and manganese react to produce electricity, vgp-bps2c,vgp-bps9.However, the anode and cathode layers in the chemical reaction process is gradually disappearing. Therefore, the battery life is limited.

Which the battery using screen printing production, similar to the manufacture of T-shirts. Single-layer thinner than a human hair. Researchers have developed this battery in the laboratory. Is expected by the end of this year, the first batch of products may be produced and put into the market.

1. How to maintain dell battery

a. battery during use, water evaporation and electrolysis of water charging both would reduce the surface, so every 5 to 6 days in summer and winter every 10 ~ 15 days should be checked once a liquid height, and then need to increase distilled water. In addition to leakage caused by lower surface, the are not allowed to add electrolyte, or the proportion of the electrolyte will be higher than 1.300, resulting in shortened battery life. Battery liquid level should be higher than the plate 15mm, easy to spill liquid level is too high, corrosion around the parts, there is likely to positive and negative pile conduction, causing self-discharge; liquid level is too low, easy to expose the upper plate surface, not only GD761 battery capacity will decrease, and the exposed plate will soon be curing.
b. in the use of batteries due to different working conditions, often charging less than the phenomenon of (especially short-distance vehicles). One of the following conditions should be to supplement charge: ① the proportion fell to 1.200 below the electrolyte; ② winter discharge Chao Guo 25%; ③ summer discharge Chao Guo 50%; ④ lights dim; ⑤ weak start. Supplementary charge in two stages. The first stage of the rated capacity of 1 / 10 of the current charge, to a single cell voltage of 2.4V, the electrolyte until the bubble began to release, which normally takes 10 ~ 11h. The second phase will halve the current up to date enough, it generally takes 3 ~ 5h. If the proportion of electrolyte irregularities, should be adjusted, its methods and the beginning of the same charge. c. Winter batteries dell inspiron e1705 battery,inspiron e1505 battery should be noted: ① piling and wire electrical connector to ensure a solid connection, good contact; ② to install insulation in the battery device, so as to avoid the temperature is too low, resistance increases; ③ the proportion of the required adjustment of the electrolyte; ④ in the engine running the engine when you add distilled water to the kd476 battery charger in order to avoid uneven mixture of water and electrolytes caused by ice; ⑤ cold start the engine preheating should be carried out, each start-up time of no more than 5s, starting to be repeated intervals 15s, if the three start - unsuccessful, should be carried out checks, do not blindly re-start; ⑥ always keep enough power to charge storage state, to prevent the electrolyte reduced the proportion of the ice, and even damage to batteries.

2. how to conduct the beginning of a new battery charger

The Latitude D830 battery positive and negative power supply respectively, then positive and negative, first with the initial charge current charge to the electrolyte release air bubbles, single-cell voltage to rise to 2.3 ~ 2.4V. Then the current drops to 1 / 2 the beginning of the charging current to continue to charge to the electrolyte release violent bubble, the proportion of electro-hydraulic and voltage remain stable until a continuous 3h. Full charging time is about 45 ~ 65h. Charging process should always measure the electrolyte temperature, if the temperature is too high, can be current half, Latitude D620 battery to stop charging or cooling method, temperature was controlled at 35 ~ 40 ℃. Initial charging is completed, if the proportion of irregularities in the electrolyte, the application of distilled water or electrolyte specific gravity of 1.4 and then adjust the charge 2h, until the proportion of compliance so far. The new xps m1330 battery charge for the first time often do not meet rated capacity, should be charge and discharge cycles. With the rated capacity of 1 / 20 of the current discharge from a single cell voltage down to 1.75V, and then add sufficient charge current. Following a charge and discharge cycles, if the capacity is still below 90% of rated capacity, should make another charge and discharge cycles.

3. How to use batteries instead of battery

The car is not damaged when the battery or batteries can be used instead of 6 to 8 dry batteries, GD761 battery , KD476 battery. Methods were: dry batteries together, using cardboard Juan Chengyi body, one end of the Da Tie the other end to pick with a wire coil on the ignition switch terminal, and then quickly shake his hand crank the handle, you can start the engine. When the engine reaches a certain speed, confident that when the generator can supply, and then removed.

4. How to activate the new batteries

Prior to the opening of the new animal cells, plate surface, there will be a certain degree of oxidation. The longer the storage, oxidation more serious. After adding the electrolyte, there will be rapid warming, the charge will show greater resistance to charging difficulties. Therefore, the opening of the new laptop battery should be done: filling the electrolyte, the static discharge of about 6h until completely saturated with the electrolyte plate, the temperature dropped to below 35 ℃, and then connect the power to charge; charge current is tightly controlled within prescribed limits , such as high temperature during charging, more than 45 ℃, the charge current can be reduced or stopped charging; for 1 ~ 2 times charge and discharge cycles in order to achieve rated capacity.

5. How safe operation when the battery maintenance in the warranty, they should observe the following safety requirements:

① moved when the light-light battery can not be skewed in order to avoid electrolyte splashed on clothing or skin, causing corrosion or burns. If they are splash, immediately flush with water. ② Check the electrolyte specific gravity and surface height, so that a little straw to leave the entrance of the electrolyte injection can be, not to mention too high in order to avoid electrolyte spill. ③ to prohibit oil containers and various metal objects on the thinkpad t60 battery housing. ④ In the preparation of electrolyte should be used when ceramic containers, and sulfuric acid slowly into the water, the absolute prohibition of water poured into the sulfuric acid so as to avoid splashing sulfuric acid burns the skin and clothing, and even the container burst causing the accident.

6. how to make the battery discharge

The new battery to charge and discharge cycles and test batteries ability to work, the basis having regard to discharge a certain standard to test whether the battery rated capacity. Powerbook G4 battery Rated Capacity 1 / 20 of the current discharge from a single cell battery voltage of each of 1.75V, and 2h at the beginning of each measurement time after discharge voltage, the voltage down to 1.8V voltage drop after the result of faster, should be 15 ~ 20mim a voltage measurement , the voltage down to 1.75V, it should immediately stop discharging, or voltage drop dramatically to the “0″ so burn plate, causing difficulties in the next charge. Discharge many ways (such as the use bulbs discharge, with the variable resistor discharge, discharge with the electrolyte and using a lower voltage battery discharge), can be selected according to specific conditions. In the discharge line, you must access ammeter in series, parallel on the voltage meter so that timely observations voltage value, lost no time to stop discharging.

7. how to reduce battery capacity to do

Dell battery charge, use of time is not long enough to save electricity, starter rotation weakness, difficulty starting the engine, speakers, sound volume reduction, lighting is dim, with high rates of discharge of dollars checklist cell battery voltage is lower than 1. 5V, namely, reduce the battery capacity. Generating capacity should first check whether it is suitable voltage regulator is too low, whether due to long-term storage battery self-discharge, whether to use starter too often, is commonly used because of their low electrolyte liquid electrolyte instead of distilled water by adding batteries, if you do not above-mentioned problems, should open the battery cover and check whether the lack of electrolyte. If the liquid level is too low and too long, so that exposed part of the plate curing, they should check out plate. If the surface of plate showing a layer of white lead sulphate, explained that it had vulcanization. If, after taking the plate, pour the electrolyte in the ThinkPad T60 battery there is too much off the bottom shell plate active material or other impurities, indicating that these substances caused by a short circuit between the plates, causing inadequate capacity.

8. How to diagnose battery charge storage capability, decrease fault

Drop charge storage capability, commonly known as “run electricity”, the main phenomena are: day before power is still close enough to keep car the next day starter on the weak rotation; engine flameout time for a little longer, then start there are difficulties; lights dim, the loudspeaker does not ring. Should check whether the battery wire Datie. If Datie, available high-rate discharge single-cell voltage meter to check each hour inspections. Such as the start voltage reaches a certain value, it became an instant rapid decline, seriously nowadays down to 0, indicating short-circuit fault between the plates. Open the D5318 battery cover should be used extract the electrolyte tube, such as the electrolyte turbid, indicating the electrolyte impurities. You should remove the plate, out of partition observation, such as a perforated partition, indicating the failure was caused by perforated partitions. In addition, the surface should also check the battery electrolyte is dirty, and whether there is overflow.

9. How to prevent battery explosion

In the beginning of a new battery charging, discharging process, water is broken down to produce a large number of hydrogen and oxygen, if not promptly released, it will face sparkle vgp-bps2c battery explosion. ① should always check and clear the battery cover of the vent stuffed to ensure that internally generated emissions of the gases out of time; ② the internal battery connections and electrical connections on the pile should be firm, in order to avoid electric discharge; ③ try to avoid piling on the battery power scratch fire, so as not to detonate; ④ first opens the battery segue, and then check the high rate of discharge of dollars.

The Li-Ion battery in my laptop has been getting a bit long in the tooth. Rated at a 4.4 AH capacity new, /proc/acpi/battery/BAT0/info told me that it was only holding 1.8 AH now that it was a few years old. (This is normal for Li-Ion batteries, which degrade over time, even without multiple charge-discharge cycles.)

A brand new IBM (or Lenovo now) battery costs over a hundred dollars, but by shopping around I was able to find a “compatible” thinkpad t60 battery for as low as $50. It was only rated at 4.4AH, but that is relatively close to the 2nd generation 4.8AH batteries that IBM/Lenovo sell for twice as much. I started to wonder if it might be cheaper to buy OEM li-ion cells and simply replace the cells (keeping the case, and charge/discharge electronics). The first step would be to determine what type of Li-Ion cells I’d need to buy, so I decided to open up my old battery.

As you can see, the standard Dell xps m1330 battery has six cells, in three parallel groups of 2. Cells are nominally 3.6volts, so this adds up to 3 x 3.6 or 10.8 volts. In the photo I have removed the shrink wrapped packaging from one cell to view the markings. Note the relatively complicated PCB along the back side of the cells that handles charging and discharging. If you zoom into the photo, you can see that the controller PCB is connected to each end of every pair of cells (orange and black wires to the far ends, silver metal tab connections to the middle two). This allows the controller to charge each parallel pair of cells at a different rate. The controller PCB is also connected to a thermocouple that is resting between the two middle cells. This gives the controller a temperature reading on the cells during charging and discharging. If the PCB detects that the temperature is too high, it can lower the charging rate, or shut down the power draw (and laptop). Also note the heat fuse (small white block in series with the power line between the two leftmost cells) that is designed to open the circuit if the charge/discharge controller for some reason fails to maintain a safe temperature. All of these safeguards are designed to keep your xps m1330 battery from igniting, and will be very important to maintain in any “re-manufactured” batteries.

I actually determined what type of li-ion cells were used by measuring them and then looking for li-ion cells of a similar size. They are about 2.5″ high by 11/16″ diameter, or very close to the 64.9mm x 18.3m diameter size of a 18650 style cell that I found on www.batteryspace.com.

My inspiron e1505 battery is rated at 4.4AH, or 4400mAH. As it has three sets of parallel cells, each set of two cells must have a 4400mAH capacity (because they are in series, you add the voltage, not the amperage), so each cell must have a 2200mAH capacity.

From a mAH per dollar standpoint, 2000mAH cells are the best value, but I decided that since the total cost difference was only six dollars, I could afford purchasing the 2200mAH cells. These are slightly lower than the 2400 mAH capacity of the newcells that Ibm/Lenovo now use, and I’ll end up with a 4.4AH battery,sony vgp-bps2c , (just like the original part number, before IBM/Lenovo upgraded it to 4.8AH).

Just the cells cost $34.20, but I chose to purchase them with solder tabs attached (an extra $1.50) because I figure the people at batteryspace.com are better than me at attaching tabs, plus having extra tabs to work with (those that come on the cells, plus those I salvage from the original cells) will make my life easier. (Besides, the $7 of shipping is the largest extra expense….if the 2600mAH cells weren’t almost twice as expensive as the 2200mAH cells I’d have gotten them just get a 5.2AH capacity battery, dell gd761 , kd476!) The total cost was $43.42. A week later my batteries arrived. (Thanks UPS!)

Important safety note!

You should never replace li-ion cells with cells that have a lower capacity rating, or charge/discharge rate rating. The electronics in dell inspiron b120 battery are programmed to prevent the cells from overheating and catching fire, and do a very good job as long as the replacement cells in the battery are of equal or higher rating than the original cells.