The difference between car batteries and 18650 batteries

Introduction The difference between car batteries and 18650 batteries is that the power batteries are different. The electric battery is the energy source that powers tools, it mainly concerns electric vehicles, electric trains, electric bicycles and golf equipment.

The difference between car batteries and 18650 batteries

Power batteries are different.

Electric batteries are the energy sources that power the tools. They primarily refer to the batteries that power electric cars, electric trains, electric bicycles and golf carts. It is mainly different from the starter battery used to start the car engine. Sealed valve lead-acid batteries, open tubular lead-acid batteries and lithium iron phosphate batteries are mainly used.

Classification of lithium batteries for electric vehicles

It is mainly divided into three categories, the first is ternary lithium, which is also the most commonly used lithium battery, second is lithium iron. phosphate, and the third is titanium. Lithium oxide, among which lithium titanate is very popular and few people use itread. First, Tianneng Chaowei and major manufacturers now mainly produce ternary lithium batteries. Among them, Tianneng Lithium Battery uses 18650 lithium batteries, and Chaowei lithium batteries mainly use soft-packaged ternary lithium batteries, which are all lithium-type ternary batteries, 3.7V fully charged 4.2 V.

What is the difference between 26650 and 18650 lithium batteries

The cell types of industrial lithium batteries include 18650 cells, polymer cells and lithium iron phosphate cells.

1. 18650 battery cell

This cathode material has high working voltage (average working voltage is 3.7V), stable charging and discharging voltage, small size, specific energy high and good cycle performance Good high conductivity, processsimple production and easy to manufacture.

Main advantages: mature technology, wide application range, small size. Main disadvantages: service life is about 300 times, poor safety performance, poor overcharge resistance, not suitable for high-rate charging and discharging, and pollute the environment after being scrapped .

In the mobile power supply market, 18650 batteries used in power supplies include: imported 18650 batteries, domestic 18650 batteries and dismantled 18650 batteries.

2. Polymer battery core

Main advantages: diversified volume, very wide use range, not easy to explode and high safety factor. Main disadvantages: higher price, environmental pollution after disposal, and poor high-current charging and discharging performance.

Polymer batteries are notnot divided into domestic, imported or disassembled batteries like 18650 batteries. They are divided into three grades, namely A, B and C.

3. Lithium iron phosphate battery

Main advantages: 2000 cycle lifespan, high current charge and discharge, low internal resistance and less heat, safe, environmentally friendly and non-toxic. Main disadvantages: It is expensive, has not yet been used on a large scale in the field of digital products and is little known among consumers.

Detailed Information

Lithium batteries generally come in two shapes: cylindrical and square. The internal structure of the battery is a spiral winding structure, with very thin, highly permeable polyethylene film insulating material separated between the positive and negative electrodes. The positive electrode includes a current collector composed of lithium-cobalt oxide(or lithium-nickel-cobalt manganate, lithium manganate, lithium iron phosphate, etc.) and aluminum foil.

The negative electrode is made of stoneIt consists of a current collector made of ink carbon material and copper foil. The battery is filled with an organic electrolyte solution. In addition, a safety valve and PTC element (used in some cylindrical types) are installed to protect the battery from damage caused by abnormal conditions and output short circuits.

The voltage of a single lithium battery is 3.7V (the positive electrode of lithium iron phosphate is 3.2V), and the capacity of the battery cannot be infinite. Therefore, single lithium batteries are often connected in series or parallel. .To meet the requirements of different occasions.

Baidu Encyclopedia - Mobile Power Cell

Baidu Encyclopedia -Lithium battery

What does 18650 battery mean?

< p>The differences between 18650 and 26650 batteries are:

1. The rated capacity is different: IFR26650 rated capacity is 3000mAh and IFR18650 rated capacity is 1100~1400mAh.

2. The diameters of the two batteries are different: the diameter of IFR26650 is 26mm and the diameter of IFR18650 is 18mm.

3. The reference masses are different: the production quality of IFR26650 is 94 grams and the production quality of IFR18650 is 45 grams.

4. The volume of 26650 is larger than that of 18650 Large, their cell heights are the same, but their cell diameters are different. The diameter of 26650 cells is 26mm, while the diameter of 18650 cells is 18mm.

5. Battery capacity is different; under the same battery material, battery capacity 26650 is higher than that of 18650. Assuming the same ternary material is used, the 26650 battery is generally around 5200 mAh, while the capacity of the 18650 battery is mainly around 2600 mAh.

6. Application environments are different: 18650 lithium batteries are widely used in lighting lamp batteries, industrial support lithium batteries, power tool batteries, electric bicycle batteries, lithium batteries power, etc. lithium batteries are used in There are many integrated lithium batteries for solar street lights, energy storage stations, solar energy storage batteries, etc.

Related as follows:

Lithium battery (Li-ion, lithium-ion battery): Lithium-ion battery has the advantages of light weight, high large capacity and the absence of memory effect, so it has been widelyused ——Many digital devices use lithium-ion batteries as power sources, although they are relatively expensive.

Lithium-ion batteries have a high energy density, their capacity is 1.5 to 2 times that of nickel-metal hydride batteries of the same weight, and they have a very low self-discharge rate. In addition, lithium-ion batteries have practically no “memory effect” and do not contain toxic substances, which is also an important reason for their widespread use.

In addition, please note that the exterior of lithium batteries is usually marked with 4.2V lithiumion battery (lithium battery) or 4.2V lithi in English.um secondary battery (secondary battery lithium), 4.2V rechargeable lithium-ion battery (rechargeable lithium battery), so users should clearly see the signs on the outside of the battery pack whenbuying batteries to avoid cadmium, nickel, hydrogen because they do not clearly see the type of battery. Nickel batteries are confused with lithium batteries.

18650 refers to a type of lithium battery.

The 18650 lithium battery is a lithium battery commonly used in electronic products and is often used as the battery core in laptop batteries. The rules for defining its model are: For example, the 18650 type refers to a cylindrical battery with a diameter of 18mm and a length of 65mm.

To find out the battery capacity of a laptop, don't look at the mAh on the back, but calculate the Wh.

Large laptop manufacturers clearly mark the battery capacity (Wh) on the battery in accordance with the Aviation Act.

Generally, Sony batteries have green leather and black heads, and theThe battery capacity is 2400mah to 2600mah. The capacity of Sanyo battery cell with red leather and green head is 2400mah, and the capacity of red leather and light blue head is 2600mah.

The way to tell 18650 batteries apart is by looking at the color of the cover. Japan Ashino Sanyo white head, yellow head 1950 mah; blue head 2000 mah; light blue head 2600 mah; purple yellow head 2800mah; 2400mah; light blue head 2600 mah.

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