What is the maximum capacity of the 18650 battery?

What is the maximum capacity of the 18650 battery? After years of development, the 18650 battery has experienced 18650 nickel-metal hydride batteries and 18650 lithium batteries to the current 18650 lithium iron phosphate batteries. The 18650 battery capacity is also increasing by 1000mAh, so the 18650 battery has the largest capacity Which one is it? Which 18650 battery is better? 18650 nickel-metal hydride battery 1.18650 nickel-metal hydride battery The voltage of 18650 nickel-metal hydride battery is 1.2v, the general capacity is between 1000mAh and 2900mAh, the maximum capacity can reach about 3100mAh, this is For a single Ni-MH battery, of course, the capacity of the Ni-MH battery can be added in parallel. The 18650 nickel-hydrogen battery had an initial market, but due to the existence of the 18650 lithium battery, the disadvantage of the application of the nickel-hydrogen battery was too obvious, so it was basically replaced. Ni-MH battery technology is mature and safe, and it is an important choice for hybrid electric vehicle (HEV) batteries, but it is difficult to meet the demand for high electrification. Ni-MH power lithium-ion batteries currently dominate, because the battery energy of existing hybrid vehicles is only 1 to 2 kWh, which cannot be driven by pure electricity, or the battery life is less than 3 kilometers. In the long run, nimh cannot be used for plug-in hybrid vehicles and electric vehicles. This is important because: (1) the specific energy and energy density of metal hydride nickel cannot meet the requirements of PHEV and EV; (2) the price of raw material Ni(OH) is higher, and the cost of high-energy batteries is higher; (3) nickel hydrogen The battery technology is basically mature, and the space for battery performance improvement and cost reduction is very limited. Nickel-metal hydride batteries have the same memory effect as nickel-cadmium batteries, but are much worse than nickel-cadmium batteries. So there is no need to discharge each charge (because improper operation will damage the battery), just charge once every three months to fully discharge and alleviate the memory effect. At present, the capacity of Ni-MH batteries can reach 2900 mAh (milliamp-hour, Chinese mainland calls mAh as r milliamp-hour). After the battery is not used for a long time, it will leak slightly corrosive and harmful liquid (harmful to the human body or damage the equipment that uses the battery), and the lithium battery may burn or explode when it is not suitable for use. Ni-MH batteries are relatively safe batteries. The voltage of the nickel-hydrogen battery is 1.2v, and the voltage of the lithium battery is 3.7v. The lithium battery has better discharge performance. Ni-MH batteries have low environmental pollution, the most important is some acid and alkali waste gas, and the most important is the harmful HCI. Environmental protection measures are in place and there should be no problem. 18650 lithium battery 2.18650 lithium battery 18650 lithium battery mainly includes 18650 lithium battery and 18650 lithium iron phosphate battery, which is currently the most widely used lithium battery on the market. Their processing capacity depends on the strength of the manufacturer. At present, the laboratory has been able to process 18650 lithium batteries with a capacity of more than 3500mAh, but the stability and consistency are not good, and the trend of mass production cannot be formed. If someone says he has 3500 or 4000 mA, that is a lie, you can tell from the price. The large-capacity 18650 lithium battery currently purchased on the market is 2950mAh, and the battery with this capacity is also called 3000mAh. At present, batteries with a capacity range of 2200mAh-2600mAh are relatively stable and the technology is relatively mature. Currently, lithium iron phosphate 18650 battery packs or square lithium iron phosphate battery packs are more popular with new energy vehicle batteries. Lithium iron phosphate batteries have advantages in terms of electrochemical performance and physical safety. Of course, its low temperature performance is still worse than that of lithium polymer batteries. Questions about nano battery standards and specifications. According to the International Standards IEC61951-2 and IEC61436, Cylindrical Battery НМ character human resources, the hexagonal character one character is designated as high frequency and drive НВ. The millimeters (rounded to the nearest integer) behind the cell diameter and the height of the cylindrical cell are displayed through lines and prism fountains to show the width, thickness, and height. For example: hr15/51hf15/09/49. Regarding the disk battery, the diameter and height (not millimeters) are expressed in 1/10 mm fractional strokes. For example, the designated disk storage with a diameter of 15.6mm and a height of 6.4mm is HB156/064. According to the following standards, we have noted the most important requirements for nano-batteries. Under the condition of (20±5)℃, the charging zone is standardized to 0.1℃ for 16h. Regarding the cylindrical and cylindrical nanobattery, it takes at least 35 minutes to discharge with a standard current of 0.2mA and a voltage of 0.9V at a temperature of 20±5°C. The service life is at least 500 times. The standard does not specify the high and low temperature requirements of nano-batteries below 0°C. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: How to make lithium battery life longer?