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Table of contents:
1、Overview of Lithium Battery Buying Guide
When we buy a battery, we should pay attention to its positive electrode material, parameters, characteristics, safety, and the difference from other types of batteries, and of course the price and place of origin that everyone cares about most.
2、Introduction of lithium battery
(1)Definitions
lithium battery is a model specification of cylindrical lithium battery. The definition rule of its model is: type, which means that the diameter of the battery is 26mm, the length is 65mm, and the battery is cylindrical.
(2)Dimensions
The diameter of the battery is 26mm and the length is 65mm
(3)Material
Lithium iron phosphate material, ternary lithium material
lithium battery cathode materials include lithium cobalt oxide, lithium manganate, nickel-cobalt-aluminum ternary, nickel-cobalt-manganese ternary, lithium iron phosphate, etc. The material system determines the characteristics of the battery’s working voltage and unit capacity. Various material manufacturers and battery cell manufacturers improve the overall battery voltage and capacity by adding special substances into the material, coating process, and manufacturing process improvement. ,
Various materials themselves will determine the cycle life of the battery, and the manufacturing level of the battery manufacturer will also affect the life.
(4)Voltage, capacity (single battery)
Under normal circumstances, the working voltage and theoretical gram capacity of various materials are:
The theoretical capacity of lithium cobalt oxide 3.6V is 274mAh/g
The theoretical capacity of lithium manganate 3.7V is 148mAh/g
The theoretical capacity of ternary material 3.65V is 278mAh/g
LiFePO4 3.2V Theoretical capacity is 170mAh/g
IFR lithium battery capacity includes mAh, mAh, mAh, mAh, mAh, mAh and mAh.
The capacity of INR lithium battery tends to be mAh, mAh, mAh and mAh.
(5)Purpose
Used in power tools, lighting, wind and solar energy storage, electric vehicles, toys, instrumentation, ups backup power supply, communication equipment, medical equipment and military lights.
(6)Advantages
High energy density: The theoretical specific capacity is 170mAh/g, and the actual specific capacity is ≥140 mAh/g (0.2C, 25°C);
High safety: the safest cathode material for lithium-ion batteries at present;
No pollution: does not contain any heavy metal elements that are harmful to the human body;
Long cycle life: under the condition of 100% DOD, it can be charged and discharged more than times;
3、 lithium battery parameters
Cycle performance: times (1C charge/1C discharge, capacity retention rate ≥80%, 100% DOD) Maximum continuous discharge current: 9.6A
Pulse discharge current: 15A, 5s
Operating temperature: Charge: 0°C ~ 55°C; Discharge: -20°C ~ 60°C
Storage temperature: -20°C ~ 45°C
Battery weight: 86 g (approx.)
Nickel-cobalt-manganese ternary lithium-ion single-cell nominal voltage is generally: 3.6V
Nominal capacity: mAh (capacity range -mAh)
AC internal resistance: ≤30mΩ (plus PTC type)
Charging conditions: cut-off voltage 4.2±0.05V, cut-off current 0.01C. (Note: Charge with 0.5C constant current to 4.2V, and charge with constant voltage until the current drops to 0.01C and cut off)
Discharge cut-off voltage: 2.75V
Cycle performance: 500 times (1C charge/1C discharge, capacity retention rate ≥70%, 100% DOD)
Maximum continuous discharge current: 13A
Pulse discharge current: 15A, 5s
Operating temperature: Charge: 0°C ~ 55°C; Discharge: -20°C ~ 60°C
Storage temperature: -20°C ~ 45°C
Battery weight: 92 g (approx.)
Diameter: 26.2mm
Height: 65.6mm
4、Features of lithium battery
(1)Size and application field: lithium battery is a type and specification of cylindrical lithium battery. The battery size is 26mm in diameter and 65mm in length. It is suitable for flashlights, instruments, medical equipment, outdoor power supplies, power tools, security monitoring, exploration and mapping, and special equipment.
(2)Material system: lithium battery is mainly divided into two types: ternary material and lithium iron phosphate material
of the ternary material system: marked as INR lithium battery nominal voltage 3.6V, full charge voltage 4.2V, discharge cut-off voltage: 3.0V INR lithium battery capacity is generally mAh, mAh, mAh relatively more.
of lithium iron phosphate system: IFR lithium battery nominal voltage 3.2V, full charge voltage 3.65V, discharge cut-off voltage: 2.0V IFR lithium battery capacity includes mAh, mAh, mAh, mAh, mAh, mAh, mAh, etc. capacity segment. The 3.2VmAh battery is specially designed for high current discharge, supports 30C discharge and instantaneous 50C discharge, and is the first choice for various starting power sources.
5、 Battery Purchase Notes
(1)Appearance and Packaging
Regular manufacturers will take into account not only good quality of products, but also details such as appearance and packaging. First of all, check whether the size is correct, whether the outsourced PVC is complete, whether there is any damage, etc., the whole is clean and tidy, the hand feels comfortable, and whether the insulation is done well.
(2)Clear and complete performance parameter identification
The products of regular manufacturers must have basic performance parameters. The logo is very clear and can be understood by ordinary consumers, such as brand trademark, voltage capacity, production date, and traceable QR code. On the contrary, the unlicensed and unmarked lithium battery is likely to be a garbage battery reassembled with inferior battery cells or recycled battery cells. There are many cheap lithium batteries on the market. They are made of recycled battery cells or disassembled battery cells. Although the price is cheap, the lifespan is short and the quality is unstable. Careless use may damage the device or even explode. Those with ultra-high capacity, ultra-low prices, not in line with the norm, most of them are fakes.
(3)Is there circuit protection
Goto SINC to know more.
Under normal circumstances, the battery must be used with a protective plate to prevent overcharging and overdischarging. Without the protective plate, the battery is at risk of deformation, leakage and explosion. After adding the protective plate, the size will be increased. Under normal circumstances, customers are recommended to purchase protected batteries.
(4)Weight and Quality Aftermarket
General battery regular manufacturers have a delivery inspection report when they leave the factory, and there will be batch related content, voltage, capacity, and battery size, weight, etc. This report can be checked accordingly. Generally, if is a lithium iron phosphate system, it is about 80 grams. The ternary material system is 86-92 grams right. Good battery consistency is very good. Regular manufacturers will promise corresponding after-sales service.
6、 lithium battery price
The following lithium battery prices are for your reference:
IFR-mAh lithium battery price: 12.5 yuan/pc.
IFR-mAh lithium battery price: 12.8 yuan/pc.
IFR-mAh lithium battery price: 10.2 yuan/pc.
7、Where to buy lithium battery
Go to battery to buy
8、 lithium battery vs lithium battery
(1)The rated capacity is different: the rated capacity of the IFR lithium battery is mAh, and the rated capacity of the IFR lithium battery is ~mAh.
(2)The two cells have different diameters: the IFR is 26mm in diameter and the IFR is 18mm in diameter.
(3)The reference mass is different: the production test mass of IFR lithium battery is 94 grams, and the production test mass of IFR lithium battery is 45 grams.
(4)Different battery size: is larger than , their cell height is the same, and the cell diameter is different. The cell diameter is 26mm, while the cell diameter is 18mm.
(5)Different battery capacity: The battery capacity of is larger than that of under the same battery material. Assuming that the battery with the same ternary material is generally around mAh, the capacity of battery is mostly around mAh.
(6)Different application environments: lithium batteries are used in lighting lamps batteries, industrial supporting lithium battery packs, power tool batteries, electric bicycle batteries, power lithium battery packs, etc., while lithium batteries are used in integrated solar street light lithium battery packs, There are many energy storage stations, solar energy storage batteries, etc.
(7)The battery life is different: , which means straight 18MM, height 65MM, in this way, must be larger than , so there is more space to fill materials, so as to achieve larger capacity, the current capacity of is , , MAH, etc., while the capacity of is generally , , MAH, and the battery life will be longer.
The above is a detailed explanation of the difference between the lithium battery and the lithium battery. The lithium battery and the lithium battery are also completely different, but they can be modified with each other, but there are differences. You can bold the battery and put it into a flashlight.
Combined with the excellent capacity characteristics and high consistency of the lithium battery, as well as the excellent structural design and mature manufacturing practice of the cylindrical battery, the lithium battery will gradually replace the lithium battery in the application of power batteries.
9、 lithium battery charger
(1)How many volts does the charger use for 4 lithium batteries?
lithium battery generally has a rated voltage of 3.6V, a capacity of 2.6Ah 2s2p, a total voltage of 7.2V, and a total capacity of 5.2Ah. It is recommended to use a 3.6V/7.2V—2.6A charger
(2)
How big is the charger for the battery?
The battery is a cylindrical lithium battery with a rated voltage of 3.7V, with a capacity of about MAH. The charging current of lithium batteries is generally controlled at 1C, that is, the charging current of batteries with a capacity of MAH is 5A, which can ensure the safety and fullness of charging.
If time permits, reducing the charging current is good for the battery, not to mention the high fullness, it is good to prolong the battery life.
If the quality of the battery is guaranteed, it can be discharged at a high rate, and the capacity is not false, and the charging current can be appropriately increased. For example, the high-rate lithium battery used in the model aircraft can be charged at a maximum current of 5C. As for the size of the charger, it depends on the current and voltage. For example, if you charge one of the above batteries, you can configure a charger with a power of 25W.
10、Safety of Lithium Batteries Using Different Materials
The lithium battery is mainly divided into two types: ternary lithium material and lithium iron phosphate material.
Ternary lithium material
Voltage: lithium battery nominal voltage 3.6V, fully charged voltage 4.2V, discharge cut-off voltage: 3.0V
Capacity: lithium battery capacity is generally mAh, mAh, mAh, mAh relatively more.
The ternary lithium material is flammable and catches fire very quickly when struck.
Lithium Iron Phosphate Materials
Voltage: lithium battery nominal voltage 3.2V, fully charged voltage 3.65V, discharge cut-off voltage: 2.0V
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