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Lithium-ion Battery Charge and Discharge Rate

Author: Source: Datetime: 2016-10-28 12:00:02

Lithium-ion battery charge and discharge rate, determines how fast we can to a certain amount of energy stored in the battery inside, or how fast the speed of the battery inside the energy released. Of course, this storage and release process is controllable, safe, and will not significantly affect the battery life and other performance indicators. For example, the solar power generator, store energy to LiFePO4 battery pack and release the energy.

 

Magnification indicators, in the battery as power tools, especially the electric vehicle energy carrier, it is particularly important. Imagine if you drove an electric car to work, halfway found that no electricity, and to find a charging station charge, charge for an hour not full, it is estimated to do things are delayed. Or your electric car is climbing a steep slope, no matter how stepped on the gas (electric door), the car is slow like a turtle, so do not pull its weight, they can not wait down the cart.


 18650 pack


Obviously, these scenes are we do not want to see, but it is the current status of lithium-ion batteries, charging time-consuming, the discharge can not be too fierce, otherwise the battery will soon aging, and even possible security problems. But in many applications, we need the battery with a large rate of charge and discharge performance, so we once again stuck in the "battery" here, like when use battery in solar powered portable generator. In order to get better development of lithium-ion battery, we need to figure out what factors are limiting the battery's performance.


Lithium-ion battery charge and discharge performance, and lithium-ion in the positive and negative, electrolyte, and their interface between the migration ability is directly related to all factors that affect the migration rate of lithium ions (these factors can also be equivalent to the battery Of the internal resistance), will affect the lithium-ion battery charge and discharge performance.

 

In addition, the internal heat dissipation rate of the battery, but also affect the performance of an important factor in the rate, if the cooling rate is slow, large-scale charge and discharge heat can not be transferred out, will seriously affect the safety and life of lithium-ion battery like lifepo4 batteries. Therefore, research and improve the performance of lithium-ion battery charge and discharge rate, mainly from increasing the migration speed of lithium-ion battery heat dissipation rate within two aspects.

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