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What is the cycle life of rechargeable battery?
sourcehttp://www.batteryspace.com/batteryknowledge.aspx#3
time2015/11/09
When a battery experiences a charge anddischarge, we call a cycle or a period.
In the stated charge and dischargeprinciples and the capacity decline before a stated standard, the total cyclesit can undergo called rechargeable battery cycle life.
Performance Comparison of various Rechargeable Batteries | |||||
Parameters | Lead acid | Ni-Cd | Ni-M-H | Liquid Li-Ion | Polymer Li-ion |
Voltage (V) | 2 | 1.2 | 1.2 | 3.6 | 3.6 |
Weight energy density (Wh/Kg) | 35 | 50 | 80 | 125 | 170 |
Volume energy Density (Wh/l) | 80 | 150 | 200 | 320 | 400 |
Cycle life (times) | 300 | 500 | 500 | 800 | 1000 |
Self discharge | 0 | 25-30 | 30-35 | 6-9 | 2-5 |
Electrolyte state | Liquid | Liquid | Liquid | Liquid | Polymer Gel |
Min. thickness | > 10 mm | >3mm | >3mm | >3mm | <1mm |
Memory effect | no | yes | no | No | No |
Pollution | yes | yes | No | No | No |
Production cost | lowest | Low | middle | High | Middle |
Advantages | High drain current and low cost | Middle drain current and low cost, smaller volume | Middle drain current and cost, higher capacity | higher capacity and lighter weight | Highest capacity, lighter weight and flexible shape |
Disadvantages | Too heavy | Environmental not friendly | Higher self-discharge and weight | Low drain current and higher cost | Low drain current and very high cost |
Applications | Car and lighting | Power tool, cordless phone and emergency lighting etc. | Toy, PDA,, MP3 and digital camera etc | Cellular phone and laptop computer | Laptop computers |