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1. Scope
This specification describes the performance, testing method, warning and caution ofthe lithium-ion polymer rechargeable battery.
The main advantages of 18650 lithium-ion battery.
High energy density: 18650 lithium-ion battery has high energy density and is able to store a large amount of energy in a compact size.
High Power Output: The design of the 18650 battery enables it to provide high power output.
Long cycle life: 18650 batteries have a long charge-discharge cycle life and can undergo multiple charge-discharge cycles without significant loss of performance.
Environmentally friendly: Compared to other types of rechargeable batteries, such as nickel-metal hydride and nickel-cadmium batteries, 18650 lithium-ion batteries have a smaller environmental impact.
Small self-discharge rate: 18650 battery has a small self-discharge rate, that is, its state of charge can remain relatively stable when not used for a long time.
High charging efficiency: 18650 battery has high charging efficiency and can be charged quickly.
High safety performance: 18650 battery is designed with high safety performance.
Lower internal resistance: 18650 batteries have lower internal resistance and can provide higher current in a shorter period of time.
High reliability: 18650 batteries are widely used in the market and have been verified and improved for many years.
2. The finished product parameters
2.1 Schematic diagram of finished product
Item | Description | Dimension |
T | Thickness | ≤10.9 |
W | Width | ≤75 |
L | Length | ≤175 |
E | Cell tab width | 25±0.1 |
A | Cell tab width | 20±0.1 |
B | Cell tab Pitch | 40±1.0 |
C | Cell tab glue | 0.2~2.5 |
D | Cell top sealant length | 4±1.0 |
Cell folded | Double side |
3. Basic Performance
No. | Item | Specification |
1 | Typical/Minum Capacity | 22.2（21.4）【4.4A(0.2C) discharging to 2.5V（25±2℃）】 |
2 | Nominal Voltage | 3.7V |
3 | Charge Ending Voltage | 4.2V |
4 | Discharge Ending Voltage | 2.5V |
5 | Standard Charging Currnet | 4.4A（0.2 C）【Ambient Temperature ：25±2℃】 |
6 | Maximum Charging Current | 4.4A（0.2C）【Ambient Temperature ：0~20℃】 |
22A（1.0C）【Ambient Temperature ：20~45℃】 | ||
7 | Std. Charging Time | 1.0~1.5 hours / 5.0~6.0 hours |
8 | Std. Discharging Currnet | 4.4A（0.2C） |
9 | Max Discharge current | 66A（3C） |
10 | Voltage as of shipment | 3.7~3.9 V |
11 | Operating environment | 0℃~45℃ Charge -20℃~55℃ Discharge |
12 | Impedance | ＜ 3mΩ（AC Impedance 【1KHz】） |
13 | Weight | Approx. 298 g |
4. Electrical Characteristics
4.1 Normal Test Conditions
Temperature: 25±2℃；Relative Humidity: 15-80%RH；
4.2 Electrochemical Characteristics
NO. | Item | Criterion | Test Method |
Impedance Resistance | ≤ 3mΩ | The Impedance shall be measured in an alternating current method after standard charge. | |
Initial Capacity（Ah） | ≥21.4Ah | Standard charge, and standard discharge | |
Temperature Characteristics | 55℃: ≥90% 0℃:≥65% -10℃:≥50% | Charge: standard charge. Rest 2~4 hours at required temperature. Discharge: CC,4.4A(0.2C), 2.5V cutoff. | |
Cycle Life | ≥200 | Temperature：25±3℃ Charge: CC-CV, 4.4A(0.2C),.4.2V, 0.03CmA cutoff; Discharge: CC, 4.4A(0.2C), 2.8V cutoff; Discharge capacity should be no less than 80% of initial capacity. | |
Shelf Lif | Keep the capacity ≥80% Recovery capacity ≥85% | Standard charge and then storage at 25±3℃ for 28 days, standard discharge. Then standard charge and standard discharge. | |
Keep the capacity ≥75% Recovery capacity ≥80% | Standard charge and then storage at 55±2℃ for 7 days, standard discharge. Then standard charge and standard discharge. |
4.3 Safety and Environmental Performance
NO | Item | Criterion | Test Method |
1 | Vibration Test | No leakage, no explosion, no fire | After standard charge, cells are to be tested as following conditions:Amplitude:0.8mm, Frequency:10~55Hz (sweep: 1Hz/min), Direction: X/Y/Z axis for 90~100min. The battery is to be tested in three mutually perpendicular to each axis. |
2 | Drop Test | No explosion, no fire. | Drop cells in the shipment condition (50% charge) from 1.0m height onto 5cm or thicker concrete with p-tile on it 3 times each of X, Y, and Z directions at 25±3℃. |
Note: Above testing of safe characteristics must be with protective equipment. | |||
5. Storage Requirement
Item | Requirement | |
Storage environment | Short period less than 3 month | -20°C ~ +45°C，65±20％RH |
Long period more than 6 month | -20°C ~ + 35°C，65±20％RH | |
Recommend storage 1 year | -20°C ~ +25°C，65±20％RH | |
● Please activate the battery once every 3 months according to the following method: Charge at 0.2C to 4.2V, rest 10 min, then discharge with 0.2C to2.7V, rest 10 min, then charge at 0.2C to 3.85V. | ||
6. Period of Warranty
The period of warranty is 12 months from the date of shipment. Nuoxin guarantees togive a replacement in case of cells with defects proven due to manufacturing process instead of the customer’s abuse and misuse.
7. Warning and Cautions
Warning
Danger warning (it should be described in manual or instruction for users, indicated especially) to prevent the possibility of the battery from leaking, heating, explosion.
Please observe the following precautions:
◆ Don’t immerse the battery in water and seawater. Please put it in cool and dry environment if no using.
◆ Do not discard or leave the battery near a heat source as fire or heater
◆ Being charged, using the battery charger specifically for that purpose
◆ Don’t reverse the positive and negative terminals
◆ Don’t connect the battery to an electrical outlet directly.
◆ Don’t connect the positive and negative terminal directly with metal objects such as wire. Short terminals of battery is strictly prohibited, it may damage battery.
◆ Do not transport and store the battery together with metal objects such as
necklaces, hairpins. Do not strike , throw or trample the battery.
◆ Do not directly solder the battery and pierce the battery with a nail or othersharp object.
◆ Do not use lithium ion battery and others different lithium polymer battery model in mixture
◆ Prohibition of use of damaged cells
◆ Don’t bend or fold sealing edge. Don’t open or deform folding edge Don’t fillet the end of the folding edge
◆ Don’t fall, hit, bend battery body.
◆ Battery pack designing and packing Prohibition injury batteries.
◆ Never disassemble the cells
◆ The battery replacement shall be done only by either cells supplier or device supplier and never be done by the user.
◆ Keep the battery away from babies.
◆ Any components contacting these two edges, they must be insulated.
◆ Do not use or leave the battery at very high temperature conditions (for example,strong direct sunlight or a vehicle in extremely hot conditions). Otherwise,it can overheat or fire or its performance will be degenerate and its service life will be decreased.
◆ Do not use it in a location where is electrostatic and magnetic greatly,
otherwise, the safety devices may be damaged, causing hidden trouble of safety.
◆ If the battery leaks, and the electrolyte get into the eyes. Do not wipe eyes,instead, rinse the eyes with clean running water, and immediately seek medical attention. Otherwise, eyes injury can result.
◆ If the battery gives off an odor, generates heat, becomes discolored or deformed,or in any way appear abnormal during use, recharging or storage, immediately remove it from the device or battery charge and stop using it.
◆ In case the battery terminals are dirt, clean the terminals with a dry cloth before use. Otherwise power failure or charge failure may occur due to the poor connection with the instrument.
◆ Be aware discharged batteries may cause fire; tape the terminals to insulate them.
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