1, a battery and rechargeable batteries What is the difference between ?
The electrochemical battery internal decisions of the type of battery is rechargeable, in accordance with their electrochemical components and the structure of electrodes know, the real rechargeable battery between the internal structure of the reaction is reversible.
In theory, this is not reversible by the impact of cycles, since the charge and discharge volume and electrodes will cause irreversible structural change, then the internal rechargeable battery design must support this change, since, only to do a battery A discharge, within its structure is simple and does not need much support this change, therefore, can not be used to recharge a battery, which is also very dangerous to the economy, if repeated use, everything real choice in the frequency of the cycle 1000 about the rechargeable batteries, such batteries can also be referred to as a battery or batteries.
2, a battery and secondary batteries there are other differences? ?
Another obvious difference is their energy and load capacity, and self-discharge rate, the second battery power than a battery of high, but their load capacity relatively small.
3, portable rechargeable battery is what the advantages and disadvantages ?
Rechargeable battery life is longer, can be recycled more than 1000, although the price of your batteries, but if the regular use of the case, is a more cost-effective. The rechargeable battery capacity than the same specifications of the alkaline manganese batteries or low zinc carbon batteries, for instance, they discharge faster.
Another disadvantage is that because of their almost constant discharge voltage, it is difficult to predict when the discharge end. When the discharge at the end of the battery voltage suddenly reduced. If the use of the camera, put a sudden end of battery power, will be forced to terminate.
But on the other hand rechargeable battery can provide the capacity than the first part of the battery is too high.
But Li-ion batteries it can be widely used in photographic equipment, because the capacity of its high energy density, and with the depth of discharge increased gradually to reduce the discharge voltage.
4, rechargeable battery is how to realize its energy conversion ?
Each battery has a capacity of electrochemical conversion, to be stored chemical energy directly into electrical energy, on the secondary electron (also known as battery) in terms of (another term also said that portable rechargeable batteries), in the course of discharge , Is to convert chemical energy into electric energy, and in the process of charge, will re-converted into electrical energy chemical energy. Electrochemical process under such a system different from the general to charge and discharge more than 500 times, and I SECRETARY products li-ion re-charging and discharging more than 1000. Li-ion is a new type of portable rechargeable batteries. It's rated voltage of 3.6 V, the discharge voltage it will gradually with the discharge of the depth of recession, unlike other rechargeable batteries, in the discharge of the voltage suddenly reduced.
5, what is Li-ion battery ?
Li-ion battery is a lithium-developed from. Therefore, introducing the Li-ion prior to introduce lithium batteries. For example, before the cameras in use on a button cell lithium batteries. The lithium battery is a lithium metal cathode materials, the carbon anode. When the battery charging, the battery on a lithium-ion cathode production, generation of lithium-ion movement through the electrolyte to the anode. As the carbon anode a layered structure, it has many porous, to the lithium-ion on the negative electrode embedded into the porous layer of carbon, embedded lithium-ion more, the higher the charge capacity. Similarly, when the battery discharge time (that is the process we use batteries), embedded in the carbon anode layer of lithium-ion emerge, movement back to positive. Lithium-ion back to the cathode, the more the higher discharge capacity. We usually say the battery capacity refers to the discharge capacity. Li-ion in the charging and discharging process, lithium-ion at the anode from the cathode → → positive state of the campaign. Li-ion as a Yao Yi, Yao Yi at either end of the bipolar battery, lithium-ion as athletes like Yao Yi running back and forth. So called Yao Yi Li-ion batteries.
6, Li-ion battery which has several components ?
(1) battery covered from top to bottom (2) cathode - active material for lithium cobalt oxide (3) divide - a special composite film
(4) negative - substances for carbon (5) organic electrolyte (6) battery shell (divided into two kinds of steel and Lvqiao)
7, Li-ion battery which merits ? What are the disadvantages ?
Li-ion has the following advantages:
1) single battery voltage as high as 3.6-3.8 V:
2) than energy, can now reach than the actual energy for the 100-115 Wh / kg and 240-253 Wh / L (2 times in Nl-Cd, 1.5 times the Ni-MH), the future as technology development, energy can be compared Up to 150 Wh / kg and 400 Wh / L
3) long cycle life, in general may reach 500 or even 1000. Discharge of small electrical current, battery life will double the electrical competitiveness.
4) safety, and pollution-free, non-memory effect. Li-ion as a predecessor of the lithium battery, the formation of Lithium-Dendrite short-circuit occurred, to reduce its application areas: Li-ion in the non-cadmium, lead, mercury, etc. Pollution on the environment have the elements: some technology (such as sintered), Ni-Cd batteries a major problem for the "memory effect," severely constrained the use of batteries, but Li-ion does not exist this problem.
5) small self-discharge
At room temperature, with the Li-ion storage a month after the self-discharge rate of 10 percent, much lower than Ni-Cd of 25-30%, Ni, MH of 30-35%. Li-ion there are also some disadvantages, such as:
1) high cost of batteries. Mainly reflected in the price of high-LiCoO2 (Co smaller resources), electrolyte purification system difficulties.
2) can not be large current discharge. As organic electrolyte system and other reasons, the resistance of the battery cells compared to other major categories. Requested a smaller discharge current density, in general discharge current 0.5 C below, the only suitable for small and medium-sized electrical current in use.
3) the need to protect the control lines.
A, a necessary and sufficient protection: a battery charge will undermine the positive impact of the structure and performance and life expectancy, while the charge to the electrolyte decomposition, excessive internal pressure caused by leakage and other problems it must be 4.1 V-4.2V under the constant pressure Charging;
B, over-protection: the release will lead to the resumption of active material difficulties, it also requires the protection of control lines.
8, what is the lithium-ion manufacturing process ?
1) ingredients
With special solution and bonding agent with the powder form of negative electrode active material is mixed, with high-speed mixing uniform, the anode is made of slurry there is a cost of the material.
2) Tu Mo
Will be made from the pulp evenly coating the surface of the foil, drying, respectively, are made of extremely negative film.
3) assembly
The cathode film - divide - negative film - divide the top-down order is placed, a battery made by the winding-core, the injection of electrolyte, such as sealing process, to complete the battery assembly process. Finished products made from the battery.
