Battery Nokia ::meliora cogito:: Basic Battery Type and it’s capacity NOkia. A normal battery has only two terminals brought out of its casing. But the batteries used in Mobile Phones, Battery Nokia,many times have more than 2, at least 3 or even 4 (at the most) terminals brought out on its casing. You may wonder why so? It is very interesting to go into the details and know more about it. Though the charging circuit inside a mobile phone is generally designed with providing a very very safe charging voltage to the battery, it is made more perfect with the use of this additional terminals provided on the battery casing.
Battery Nokia and particular model of the phone
Let us see why it is thought necessary, to provide more than the normal 2 terminals in Mobile Phones Batteries. Take the case of a Nokia phone 3310 or 3315. You may notice that for this particular model of the phone the Battery Nokia available are of both the types,Battery Nokia Ni-Mh as well as Li Ion types. It is necessary to inform you at this stage that not only the charging current may differ in these two different kinds of batteries but also the voltage level up to which they can be charged safely will also differ in them.
Battery Nokia different levels of voltages
To be more specific, the Ni-Mh battery can be charged safely up to 5.2 volts whereas the Li Ion battery’s safe voltage is only 4.8 volts. Battery Nokia So the same circuit in the mobile phone will have to stop charging the batteries at different levels of voltages in each case. So how it will know which kind of battery is inserted in the mobile phone and to be charged and so at which level to stop charging in each of the case?
Battery Nokia voltage level at that point called BSI
This is achieved with the help of a standard, pre-decided or pre-determined by all the battery manufacturers according to which they put extra components inside each battery casing which will bring a certain predetermined Battery Nokia voltage level at that point called BSI (Battery Size Indicator), which will help not only to know the type of battery it is but will also let us know it’s capacity in mAH!!!! Isn’t it very intelligent?
Yes, it is a very nice way of letting the charging circuit to know how much charging current it should supply and on reaching which level of voltage, it should stop supplying the charging current to the Battery Nokia. I am sure, all of you would like to now how this is achieved. The following details taken from the technical pages for the Battery Nokia Model 3310 will help you understand this better .
The type of the battery inserted in the mobile phone is found out by the think-tank of the phone, which is the CPU (Central processing Unit) of the mobile phone. In the case of Nokia 3310-3315 models it is the IC known as MAD IC, which is actually the CPU of the mobile phone. This is done by the CPU with the help of the Charging Control IC of the phone CCONT IC. hem,, Battery Nokia its right.
Battery Nokia spesific Battery Type and it’s capacity
The CCONT IC reads the voltage at a point on the Battery Nokia called the BSI line. The Batteries contain a pull-down (connected to either ground or the –ve terminal of the battery) resistor inside the battery casing. Typically, for a BLB-2 type of Nokia battery (Li Ion 650 mAH), it is a 68Kohms resistor. Other values used in other types of batteries are listed in the table below:
|Battery Type and it’s capacity||Value of the pull down resistor inside the battery|
|BMC-2 Ni-Mh 640mAH||3.3K (3.3K=3.3Kohms=3300ohms)|
|BMC-3 Ni-Mh 900mAH||5.6K|
|BLB- 2 Li-Ion 650 mAH||68K|
|BLC- 2 Li-Ion 900 mAH||75K|
this discussion about Battery Nokia, its end..