Product Description
Power Lithium Cell 802045 3.7V 750mAh Rechargeable Lithium Ion Polymer Battery For Smart Device
| NO. | Items | Specifications |
| 1 | batteries | 3.7v 750mah lipo battery |
| 2 | Charge voltage | 4.2V |
| 3 | Nominal voltage | 3.7V |
| 4 | Nominal capacity | 750mAh 0.2C Discharge |
| 5 | Charge current
| Standard Charging:0.5C
Rapid charge: 1.0C |
| 6 | Standard Charging method | 0.5C CC(constant current)charge to 4.2V, then CV(constant voltage 4.2V)charge till charge current decline to ≤0.05C |
| 7 | Charging time
| Standard Charging:2.75hours(Ref.)
Rapid charge: 2hours(Ref.) |
| 8 | Max.charge current | 1.0C |
| 9 | Max.discharge current | 1.0C |
| 10 | Discharge cut-off voltage | 2.75V(0.2C) |
| 11 | Operating temperature | Charging: 0 °C ~45 °C
Discharging:0 °C ~45 °C |
| 12 | Storage temperature | -10°C~ +45 °C |
| 13 | Dimension | Length: 45±2mm (not including tabs)
Width: 20±0.5mm
Thickness:8±0.2mm |
| 14 | Drop Test | The cell is to be dropped from a height of meter twice onto concrete ground. No fire, no leakage |
| 15 | cycle time | ≥500times |
Production steps for lithium polymer battery cell:
Positive electrode material preparation:
Using ternary materials (composite oxides of nickel, cobalt and manganese) as active materials, positive electrode plates are made through stirring, coating and other processes.
Negative electrode materials: Carbon materials such as graphite are usually used, and negative electrode plates are made through coating and rolling.
Electrolyte: It is a mixture of lithium salt (such as lithium hexafluorophosphate) and organic solvent, which directly affects the performance of the battery.
Key production steps:
Slurry preparation: The positive and negative active materials are mixed with the binder to form a uniform slurry, which is then coated on metal foil (such as copper foil or aluminum foil) after being stirred by a vacuum mixer without bubbles.
Pole plate processing: The coated pole plates are dried, rolled (densified) and cut to form pole plates of specific sizes.
Battery assembly: The positive and negative pole plates, separators, etc. are assembled into a battery cell and injected with electrolyte.
Formation and testing: Activate battery performance through charge and discharge cycles and screen out unqualified products
Application:
Smart devices:
Suitable for devices with moderate battery life requirements such as fingerprint locks, cervical massagers, microphones, etc. The battery has a standard voltage of 3.7V and supports working in an environment of -10~60℃. The cycle life is up to 500 cycles, which can meet daily use needs.
Consumer electronics:
Can be expanded to small household appliances such as aromatherapy machines and beauty devices. Its lightweight design (10×20×40mm) and low-temperature working characteristics (-10℃ start-up) are suitable for outdoor scenes in winter.
Industrial scene:
Outstanding performance in medical equipment (such as detectors, scanning pens). The battery has high consistency and low self-discharge characteristics (monthly self-discharge rate ≤5%), and can maintain stable performance after long-term storage.
How to make sure the battery qualtiy:
A-grade battery cells:
Use high-quality raw materials, sufficient capacity, long battery life, safe and non-explosive, non-inflating, and fully automated manufacturing.
High-performance protection board
Use high-strength protection board, stable voltage output to support current (use protection board according to battery output), prevent overcharging, over-discharging, and short circuit.
International standard lead wire:
Use high-quality wire, strong conductivity, not easy to break, can support high-probability discharge.
Wide nickel tabs:
Use high-quality tabs, good thermal conductivity and electrical conductivity, reduce heat generation, and stable current output.
Pictures:
