The three wires of the 7.4V 2200mAh lithium battery are: the red wire is the 7.4 volt positive electrode, the black wire is the negative electrode ground, and the White wire is 3.7 volts for balance voltage in the middle of the battery.
If the battery does not have a protective plate, the three wires are: the red wire is the positive pole, the black wire is the negative pole, and the other colored wires are the center pole of the battery. battery. These three wires are connected to the motherboard of your product. The center pole allows your product's motherboard to monitor the voltage of the lithium battery.
If the battery has a protection board, the three wires are: the red wire is the positive terminal of the battery, the black wire is the negative terminal of the battery and the other colored wires are the NTC . (thermistor) of the protection board. The thermistor is for the motherboard. Detects temperature of lithium batteries or distingue the battery type.
Detailed information
Working principle
Lithium metal battery:
1. A battery that uses manganese dioxide as the positive electrode material, lithium metal or its metal alloy as the negative electrode material, and which uses a non-aqueous electrolyte solution.
2. Discharge reaction: Li+MnO2=LiMnO2
Lithium-ion battery:
1. Lithium-ion batteries generally use lithium alloy metal oxide as the element. Positive electrode material, graphite as negative electrode material, battery using non-aqueous electrolyte.
2. The reaction that occurs on the positive charge electrode is
LiCoO2==Li(1-x)CoO2+XLi++Xe-(electron)
< p>3, The reaction which occurs on the negative charge electrode is6C+XLi++Xe-?=LixC6
4 The total reaction of the rechargeable battery: LiCoO2. +6C=Li(1-x)CoO2 +LixC6
Remarks
1. Storage requirements: In an environment with a temperature of 20 ± 5 ℃ and humidity not exceeding 50%, air and water vapor should be avoided during transportation. Erosion of aluminum foil;
2. This product is divided into two models, A and B. The main features of each are: Model A has a black appearance, the thickness of the conventional coating is 4-8 μm on both sides, and its conductive performance is better. To underline ; the appearance of model B is light gray, the thickness of conventional coating is 2-3μm on both sides, the coating area can. be welded with fewer layers and the coating machine can identify skip gaps;
3. Type B (gray) carbon coated aluminum foil can be ultrasonic welded directly in the coating area and is only suitable for welding. rolled battery tabs (up to 2-3 layers of partspolar), but the power and time of the ultrasound must be precisely adjusted;
4. The heat dissipation of the carbon layer is worse than that of the rolled battery. aluminum foil, so the belt speed and baking temperature should be fine-tuned appropriately when coating;
5. This product is good for lithium batteries and capacitors. The overall performance has been significantly improved, but it cannot be improved. used as the main factor to change some aspects of battery performance, such as battery energy density, high and low temperature performance, high voltage, etc.
References:
Parameters of 7.4V lithium battery
Almost, 7.4V is a combination of two lithium batteriesum polymer/or two lithium-ion batteries in series, because the average voltage of a single battery is 3.7 V when discharged, two in series are 7.4 V 7.2 V or two 3 .6; V series batteries Composition, generally a lithium-ion battery (steel shell or aluminum shell); 8.4 V is composed of two 4.2 V lithium batteries (cobalt acid...
Combination method: ICR18650 - 3S1P
Rated voltage: 11, 1V
Rated capacity: 2200mAh
Standard continuous discharge current: 0.2C
Maximum continuous discharge Discharge current: 1C
Operating temperature: Charge: 0~45℃
Discharge: -20~60℃
Product size: MAX 19*56*70.5mm< /p>< p>Finished product internal resistance: ≤320mΩ
Standard weight:
Protection board: IC-S8254AAF+MOS-AO4409
Main model：JST- Inverted VHR-2P UL1007/20#, line length 200mm
Protection parameters:
Overload protection voltagerges/each string 4.28 ± 0.025 V
More -Over discharge protection voltage 2.4 ± 0.1 V
Over current value: 10 ~ 17 A