 |
| LITHIUM BATTERIES |
|
|
 |
 Manganese Dioxide Lithium Batteries for Memory
Backup1.Introduction Backup power sources for electronic equipment can be divided into two large groups: power backup batteries for providing full backup power to run a piece of equipment during a power outage; and memory backup batteries which do not run a piece of equipment, but, rather, provide power to memory components. As for the former, Ni-Cd batteries, sealed lead storage batteries, alkaline-manganese batteries or other relatively large batteries which can provide hours of serviceable time are used as standby power.But here we are going to concentrate on the latter: memory backup batteries. 2.Selecting Memory Backup Batteries Especially in regard to determining the average consumption current, in general, there are apt to be changes in the consumption current due to ambient temperatures in the case of assemblies which consist of CMOSs, ICs or other electronic components. Therefore, when using calculation tables, one should not make calculations from the consumption current values at 20°C or 25°C; but, rather, from the consumption current value at the highest in situation temprature(for example 60°C). 3.Using Lithium Batteries as a Memory Backup Power Source There are many kinds of lithium batteries depending on which materials are used for the positive electrode. Here we are going to concentrate our discussion on our (+MnO2/Li-) CR batteries which use manganese dioxide as the positive material. Major Features of NOVEL Memory Backup Batteries (1)High Voltage Simplifies Use With a nominal voltage of 3 V, a single NOVEL memory backup battery can do the work of two to three conventional batteries. As a primary battery, no charging circuit is necessary. Special tabs also permit direct board mounting. (2)Provide Long Term Reliability Thanks to the use of positive materials which have been specially pretreated, and a separator, these batteries have an extremely low self discharge rate and provide stable discharge characteristics over long periods of time, thus ensuring reliable memory backup. (3)Maintain Stable Voltage Over a Wide Temperature Range These batteries can provide the stable discharge voltage you need for backup because they possess stable discharge characteristics over a wide serviceable temperature range of -20°C ~ +65°C, and they make it possible to minimize voltage changes even to the point where you no longer need to reduce excessive voltage levels when starting discharge. (4)Ensure Safety The manganese dioxide which forms the positive material is a solid and chemically stable. The batteries, which possess excellent leak proof characteristics and use an electrolyte which has a very low corrosively, are extremely safe and will not damage printed circuit boards or other equipment. |
| Item |
| Type | Product code | Nominal Voltage (V) |
*Nominal capacity (mAH) |
Standard current (mA) |
Pulse current (mA) |
Max. dimensions (mm) |
Weight (grams approx.) |
| Coin Shapes | CR2016 | 3.0 | 90 | 0.1 | 15 | f20.0 1.6 |
1.7 |
| CR2025 | 3.0 | 160 | 0.2 | 15 | f20.02.5 |
2.4 | |
| CR2032 | 3.0 | 220 | 0.2 | 15 | f20.03.2 |
3.2 | |
| CR2430 | 3.0 | 280 | 0.2 | 20 | f24.53.0 |
4.6 | |
| CR2450 | 3.0 | 600 | 0.2 | 20 | f24.55.0 |
6.9 | |
| CR2477 | 3.0 | 1,000 | 0.2 | 20 | f24.57.7 |
10.0 | |
| Cylindrical Shapes (Low Drain Use) |
CR8 LHC |
3.0 | 3,000 | 2.0 | 190 | f17.045.0 |
23.0 |
| CR2/3 8L |
3.0 | 2,000 | 1.0 | 130 | f17.033.5 |
15.0 | |
| CR1/2 8L |
3.0 | 1,150 | 0.5 | 70 | f17.023.0 |
9.0 | |
| CR6L |
3.0 | 2,300 | 2.0 | 160 | f14.550.5 |
17.0 | |
| CR2/3 6L |
3.0 | 1,350 | 0.5 | 110 | f14.533.5 |
11.0 | |
| CR1/2 6L |
3.0 | 1,000 | 0.5 | 70 | f14.525.0 |
8.0 |
| Nominal capasity on discharging at 20°C (68F). (End-point Voltage:2.0V) |
| Structure |
 |
|
|
| [ Page top ] |