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1, a battery and rechargeable battery What's the difference?
The electrochemical nature of the decision within the dell 1691p laptop battery of the type of battery is rechargeable, according to their electrochemical composition and structure of electrodes can see, the real rechargeable battery between the internal structure of the reaction is reversible.
In theory, this reversibility is not affected by the impact of cycles, since the charge and discharge in the electrode size and structure caused by reversible changes, then the internal rechargeable battery must be designed to support this change, since, once the battery is only done a discharge, it is much simpler in structure, and does not need to support this change, therefore, can not be brought once the battery charge, this approach is also very very dangerous economic, if you need to re-use, everything you choose the real number of cycles in the 1000 about rechargeable batteries, such batteries can also be referred to as a battery or batteries.
2, a battery and secondary battery there any other difference?
Another obvious difference is their energy and load capacity, and self-discharge rate, rechargeable battery power than a battery of high, but their load capacity is relatively small.
3 advantages and disadvantages of rechargeable batteries for portable What is this?
Rechargeable battery life is longer, can be recycled more than 1000, while prices have more than batteries expensive, but if frequently used, is more cost effective. Charging the battery capacity than standard alkaline manganese batteries with or zinc-carbon battery is low, for example, they discharge faster.
Another drawback is that because of their almost constant discharge voltage, is difficult to predict when the end of the discharge. When the discharge end of the battery voltage is suddenly reduced. If the use of the camera, suddenly the dell inspiron 600m laptop battery power discharge finished, it had to be terminated.
But on the other hand the capacity of rechargeable batteries can provide more than part of a battery is too high.
However, Li-ion batteries but can be widely used photographic equipment, because it is high capacity, energy density, as well as the depth of discharge increases with decreasing the discharge voltage.
4, rechargeable batteries is how to achieve its energy conversion?
Each battery has a capacity of electrochemical conversion, will convert stored chemical energy directly into electrical energy on the secondary electron (also called battery) case (also known as another term so that portable rechargeable batteries), in the discharge process is to convert chemical energy into electrical energy; and in the process of charging, this will re-converted into electrical energy to chemical energy. Such a process according to electrochemical systems, generally charge and discharge more than 500 times, while our products li-ion charging and discharging can be repeated more than 1000 times. Li-ion is a new type of portable rechargeable batteries. It's rated voltage of 3.6V, it is the discharge voltage with the discharge depth of the gradual decline, unlike other rechargeable batteries, as in discharge does not, the voltage suddenly drops.
5, what is the Li-ion batteries?
Li-ion battery is a lithium-evolved. Therefore, introducing the Li-ion, before introducing lithium batteries. For example, previously used button batteries inside the camera belongs to Li-ion battery. Lithium battery cathode material is lithium metal, the negative electrode is carbon. When charging the battery when the battery on the positive lithium ion generation, resulting lithium-ion movement through the electrolyte to the cathode. As the carbon anode layered structure, it has a lot of micro, to lithium-ion on the anode embedded in porous carbon layer, the embedded lithium-ion the more the higher the charge capacity. Similarly, when the battery discharge (ie, the process we use the battery), embedded in the carbon cathode layer of lithium-ion extrusion, but also movement back to positive. Back to the cathode of lithium-ion the more the higher discharge capacity. We usually say that the compaq presario 2100 laptop battery capacity is the discharge capacity. In the Li-ion charge-discharge process, lithium-ion transition from the positive → negative → positive moves in space. Li-ion is like a rocking chair, rocking chair at both ends of the battery poles, while the lithium-ion rocking back and forth as players do run. Therefore, also known as Li-ion rocking chair batteries.
6, Li-ion batteries which of these parts?
(1) battery cover from top to bottom (2) positive - active substances for the lithium cobalt oxide (3) diaphragm - a special kind of composite membrane
(4) negative - active substances for carbon (5) organic electrolyte (6) Battery shell (divided into two kinds of steel and aluminum)
7, Li-ion batteries have to do this? What disadvantages?
Li-ion has the following advantages:
1) The single cell voltage of up to 3.6-3.8V:
2) than the energy larger than the present to achieve real energy 100-115Wh/kg and 240-253Wh / L (2 times the Nl-Cd, 1.5 times the Ni-MH), the future, as technological development, specific energy can be Up to 150Wh/kg and 400 Wh / L
3) The long cycle life in general can reach more than 500 times, or even 1000 times. For small electrical current discharge, the battery will double the lifespan of electrical appliances competitiveness.
4) The safety performance is good, pollution-free, no memory effect. As the predecessor of Li-ion batteries, due to the formation of lithium dendrite easy to short-circuit, reducing its application areas: Li-ion does not contain cadmium, lead, mercury, etc. elements of the environment pollution: Some processes (such as sintered) and Ni-Cd batteries there is a major drawback for the "memory effect", seriously hindered the use of batteries, but Li-ion does not exist at this problem.
5) The self-discharge of small
Room temperature, full power Li-ion storage a month after the self-discharge rate of about 10%, much lower than Ni-Cd of 25-30%, Ni, MH 30-35%. Li-ion also exist some disadvantages, such as:
1) The high cost of batteries. Mainly reflected in the price of LiCoO2 high (Co resources to small), electrolyte purification system difficult.
2) can not be high-current discharge. As the organic electrolyte system, and other reasons, the battery internal resistance compared to other type of batteries big. Therefore, I demand a smaller discharge current density, the discharge current at 0.5C below normal, only suitable for small and medium-current electrical use.
3) The need to protect the line control.
A, overcharge protection: compaq presario 2500 laptop battery over charge would undermine the positive structure, which affects the performance and life; the same time, the overcharge to the electrolyte decomposition, excessive internal pressure caused by leakage and other problems; and therefore must be under constant pressure 4.1V-4.2V charge;
B, over-discharge protection: over-discharge recovery of active substances will lead to difficulties, they also need protection circuit control.
8, what is the lithium-ion production process?
1) Ingredients
With a special solution and adhesive powder, respectively positive and negative active material mixed evenly through the high-speed mixing, the slurry of the positive and negative electrodes made of the material.
2) Tu Mo
Will be made of pulp evenly coated metal foil on the surface, drying, respectively, a pole piece made of positive and negative electrodes.
3) assembly
By positive piece - Diaphragm - negative film - put away the order from top to bottom membrane, after winding core made of the battery pole, through the injection of the electrolyte, sealed and other processes, namely, the completion of the battery assembly process. Finished products made from the battery.
4) into
With special equipment, battery charge and discharge the battery charge and discharge of the finished product testing, for each battery is only for testing. Screen out qualified finished batteries to be factory.
9, lithium-ion security features is how to achieve it?
Li-ion in order to ensure a safe and reliable to use, the experts had a very strict and thorough safety performance battery design, battery safety assessment in order to achieve targets.
1) The diaphragm 135 ℃ Automatic shutdown protection
Adopt the international advanced Celgars2300PE-PP-PE three-layer composite film. Temperature reached 120 ℃ in the toshiba satellite a65 laptop battery case, PE composite membrane on both sides of the membrane hole closed, the battery internal resistance increases, the battery internal temperature slowed down, the battery temperature reached 135 ℃, when, PP film hole closed, the battery within the circuit, the battery is no longer warming, to ensure that the battery safety and reliability.
2) adding additives to the electrolyte
Overcharge the battery, the battery voltage is higher than 4.2V under the conditions of electrolyte additives and other substances in polymer electrolyte, the battery internal resistance increased significantly the formation of large-scale circuit inside the battery, the battery is no longer warming.
3) Battery cover composite structure
Nicks the ball with explosion-proof battery cover structure, the hp f4809a laptop battery temperature, the battery in the process of internal activation generated by part of the gas expansion, the battery internal pressure increased, the pressure reaches a certain level of nicks broken deflated.
4) a variety of environmental abuse testing
To the misuse of experiments, such as external short circuit, overcharge, acupuncture, shock, burning, etc. to inspect the battery safety performance. The same time, the battery temperature shock test and vibration, drop, shock and other mechanical properties of experiments to study the actual use of batteries in the performance of environmental Yan.
9, what limits charge voltage? Rated capacity? Rated voltage? Termination voltage?
A, charging limit voltage
Provided by the manufacturer, the battery charge transferred by the constant current constant voltage charging when the voltage value.
B, rated capacity
The manufacturer of the battery capacity indicating that the battery in an ambient temperature of 20 ℃ ± 5 ℃ conditions, the rate of discharge to the 5h end voltage of electricity to be provided, with C5, said units of Ah (ampere hours) or mAh (milli - an hour).
C, nominal voltage
To indicate the battery voltage approximation.
D, the termination voltage
Discharge upon termination of the provisions of the battery load voltage, its value is n * 2.75V (single lithium-ion batteries in series just a few with "n" indicated).
10, why constant voltage charging current is gradually reduced?
Because the constant current process is terminated, the battery inside the electrochemical polarization and then ran to keep the same level throughout the constant-current, constant voltage process, and then a constant electric field, the internal Li + concentration polarization in the gradual elimination of the migration of ions expressed as the number and speed of the current gradually reduced.



11, what is the capacity of the battery?
The hp pavilion zx5000 laptop battery capacity of a rated capacity and actual capacity of the sub. Rated battery capacity is the design and manufacture of batteries required or to ensure the battery under certain discharge conditions, it should emit a minimum amount of power. Li-ion batteries at room temperature requirements, constant current (1C) constant-voltage (4.2V) under the control of charging rechargeable 3h, the battery's actual capacity refers to the battery under certain discharge conditions, the release of the actual power consumption, mainly due to discharge rate and temperature effects (so strictly speaking, the battery capacity should indicate charging and discharging conditions). Common units of capacity: mAh, Ah = 1000mAh).
12, what is the battery internal resistance?
Refers to the battery at work, the current flows through the battery internal resistance suffered. There ohmic resistance and polarization resistance of two parts. Great battery internal resistance would result in battery discharge voltage to reduce discharge time. Mainly affected by the size of the battery internal resistance of materials, manufacturing processes, the battery structure factors. Is a measure of battery performance is an important parameter. Note: generally charge state resistance as a standard. You need to use the battery internal resistance measuring instrument-specific resistance measurement, rather than using multimeter ohm range measuring.
13, what is the open circuit voltage?
Refers to the battery during non-working state that the circuit no current flows out of date, between the toshiba satellite a105 laptop battery positive and negative electrical potential difference. Under normal circumstances, Li-ion, after fully charged open circuit voltage of 4.1-4.2V or so, the discharge pressure is 3.0V or so after the opening, through the battery open circuit voltage, can determine the battery state of charge.
14, what is the working voltage?
Also known as the terminal voltage is defined as a state of the battery at work that there is current outdated circuit between the battery positive and negative electrical potential difference. The battery discharge working conditions, when the current flows through the internal battery when the battery do not need to overcome the resistance caused by the resistance, the working voltage is always lower than the open-circuit the battery, charging time is the opposite. Li-ion discharge operating voltage of about 3.6V.
15, what is the discharge platform?
Discharge platform is a constant voltage charge to a voltage of 4.2V and the power to stop charging when the current is less than 0.01C, and then set aside for 10 minutes, at any rate of discharge were discharged to 3.6V under the current, when the discharge time. Is a measure of an important criterion for good and bad battery.
16, what is (charging and discharging) Rate? When the rate?
Refers to the battery release within the specified time required when the rated capacity of the current value of its data value equal to a multiple of the battery rated capacity, usually with the letter C in Table training materials: basic knowledge of the battery 100 Q & A