Introduction Of High-rate Power Lithium Battery

What kind of battery is a high-rate power lithium battery? In fact, in popular terms, a battery that can support how many times its standard discharge current is called a rate battery, for example, 1C is one rate, 2C is 2 rate, etc. Generally, 10C or above is called a high rate battery. How can we better understand high-rate power lithium batteries?

The high rate is relative to the normal rate and represents the charge and discharge capacity of lithium-ion batteries. High rate batteries are divided into discharge rate and charge rate. "C" is used to indicate the ratio of the battery charge and discharge current, that is, the rate.

For example, for a 10000mAh battery, 0.2C means that the battery is discharged at a current of 2000mA (0.2 times 10000mAh), and 1C means that a 10000mAh battery is discharged at 1 times the current of 10000mAh. If the battery supports a maximum current discharge of 20C, it is the battery label If it is marked with 20C stable discharge, the maximum allowable stable discharge current of this battery is: 200,000mA, 200A;

The maximum current discharge of the battery is the discharge time: 10000mAh=10Ah, that is, it can be discharged for 1 hour at 10A current, then the discharge time for 200A current is 10Ah/200Ah×1 hour=0.05 hours=3 minutes;

The difference of high-rate power lithium batteries is mainly based on the C number that they support rate discharge. The distinction is also divided according to the C number. Generally speaking, a high-rate battery that supports 10C discharge rate can accept lower power consumption than 10C discharge requirements. The equipment is used, but it does not support the use of electrical equipment with a higher current than 20C, otherwise the battery will be easily damaged.

In fact, high-rate lithium batteries are currently commercially available in the market. There are two types of high-rate polymer lithium batteries and high-rate lithium iron phosphate batteries. Because of their different raw materials, they can provide a range of rate discharge C numbers. It is also different. High-rate polymer lithium batteries can support a certain rate in the range of 1C to 120C for customized production, while high-rate lithium iron phosphate batteries support a certain discharge rate within the range of 1C to 45C for customized production. Although high-rate polymer lithium batteries are better than high-rate lithium iron phosphate batteries in supporting large current discharge performance, they are not as good as high-rate lithium iron phosphate batteries in terms of high temperature resistance, safety performance and service life. At the same time, they are more expensive Also slightly more expensive.

The application fields of high-rate power lithium batteries are more common in new energy vehicles, drones, power robots, power tools, etc. Of course, there are other wireless electronic products that have special requirements for high-current discharge, such as high-power wireless equipment backup Power.