2010年1月25日星期一

Basic knowledge of animal cells

1What is a battery and secondary battery?

An ordinary dry battery is only used once,laptop battery Also known as secondary batteries may be rechargeable batteries. Secondary batteries in the power-type battery (or traction batteries) is the electric vehicle is currently the main power supply.


2, A battery and secondary battery What's the difference? ?


The electrochemical nature of the decision within the battery of the type of battery is rechargeable, according to their electrochemical composition and structure of electrodes we 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,Toshiba Tecra 9000 Battery, Toshiba Tecra 9100 Battery, it is much simpler and does not require the internal structure 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, should choose the real number of cycles in the350Times about rechargeable batteries, such batteries may also be referred to as secondary batteries or battery.

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, Rechargeable battery 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 battery (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,Toshiba Laptop Battery generally charge and discharge500Or more times.

4Electric bicycle battery What are the characteristics?

Electric bicycle battery is a power-type battery, it can be characterized by large current discharge within a certain period of time for motor vehicle operation, and can maintain a certain period of time to run a certain distance.


Car battery power and the fixed battery, such as the instrument batteries, electricity, communication systems batteries, starter batteries, the performance is different from the structure to its charge and discharge in different ways,Toshiba Tecra 9000 Battery, Toshiba Tecra 9100 Battery, it is not universal.


5Electric bicycle battery is how to classify it?


From the big perspective, once the battery cell sub -(Electric vehicle power supply has become history to do it), Secondary batteries and fuel cells. Car batteries according to the nature of acidic and alkaline electrolyte, according to shape into a square and cylindrical, are divided into per-use mobile and fixed by use of divided power type, starter type and ordinary type, according to structural sub - for the open type and enclosed structure. Of which: there are different forms of lead-acid batteries, such as from the structure is divided into a high profile with the type and dwarf type; according to the state is divided into rich acidic electrolyte fluid type, fluid type and colloid electrolyte depleted of three, according to the plate structure is divided into plate, roll and tubular.


At present conventional battery-electric vehicles are mainly lead-acid batteries, nickel-metal hydride batteries, Toshiba Tecra 9100 Battery, nickel-zinc batteries, lead-acid batteries Among them, the most popular and the remaining two kinds of Naishi is still small. The main reason is the market action did not begin, there is no formation of LO products for electric vehicles the size of output, prices do not had not yet been accepted by the majority of users, but will soon enter the boom. Technical success of the other three cell--Lithium-ion batteries, zinc-air battery is the second nickel-metal hydride, nickel-zinc batteries after the upgrade products; fuel cell prices are still sky high, mainly due to the high cost of proton exchange membrane preparation, catalytic metals are precious things, certain techniques still need to improve the not a large scale into the areas of production, still6 ~ 8Years to spread.


56Lead-acid battery discharge rate and the use of care?

The same power motors, rated voltage is different, absolutely different from the speed of consumption.Toshiba Tecra 9000 Battery, Toshiba Tecra 9100 Battery, For example: same180WElectric motor, rated voltage24VWhen current is7.5A; And rated voltage36V, The current is only5AThey use the same battery capacity, combined for the36VTo5ACurrent discharge, electro-chemical reaction is slow, while the combination of24VTo7.5ACurrent discharge, electro-chemical reaction will be relatively intense, it is better to5ADischarge calmly.


Batteries0.5CThe following current discharge is the economy. What0.5C?C: That is the battery capacity,C2Express the view that2Hours release rate of discharge of the battery when the determination of the actual capacity obtained. This means that the calibration for theC2Capacity, should be released half an hour capacity (0.5C2) Is consistent with the capacity requirements, if more than0.5C2, It is necessary to discount the capacity of the. But also for the battery life adversely.


Now, in order to2Hours the rate of discharge capacity of marked12AhThe battery should be marked asC2= 12AhSo0.5C2= 0.5×12 = 6A. So12AhOf batteries0.5CDischarge,Toshiba Tecra 9000 Battery, is the current6A.10AhBattery0.5A.


The battery to work long hours, the output of the operating current of not more than the battery rated capacityCxIndeed/ X,XThe battery is rated when the next rate, which is the principle of choice.XIs2, They should be2Hour discharge rate;XValue3, Then the use of time should be3Hours to consider.

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