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The battery C Rating is the measurement of current in which a battery is charged and discharged at. That same 10Ah battery being discharged at a C Rating of 0.5C will provide 5 Amps over two hours, and if discharged at a 2C Rate it will provide 20 Amps for 30 minutes.
What is C in discharge rate?
A C-rate is a measure of the rate at which a battery is discharged relative to its maximum capacity. A 1C rate means that the discharge current will discharge the entire battery in 1 hour. A 5C rate for this battery would be 500 Amps, and a C/2 rate would be 50 Amps. Similarly, an E-rate describes the discharge power.
How is battery C rate calculated?
A C/20 rate means that battery capacity is calculated based on completely discharging it over the course of 20 hours. So, if you have a 1,000 amp-hour battery bank, charging or discharging at 50 amps would be a C/20 rate (1,000 Ah ÷ 50 A = 20 hrs.).
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What does C rate mean on a battery?
In other words, C-rate is used to scale the charge and discharge current of a battery. For a given capacity, C-rate is a measure that indicates at what current a battery is charged and discharged to reach its defined capacity. A 1C rate (or C/1) means that the discharge current will discharge the entire battery in 1 hour.
How is the charge and discharge rate of a battery determined?
Charge and discharge rates of a battery are governed by C-rates. The capacity of a battery is commonly rated at 1C, meaning that a fully charged battery rated at 1Ah should provide 1A for one hour. The same battery discharging at 0.5C should provide 500mA for two hours, and at 2C it delivers 2A for 30 minutes.
How does the C rate affect the charge time?
You can increase or decrease the C Rate and as a result this will affect the time it takes the battery to charge or discharge. The C Rate charge or discharge time changes in relation to the rating. 1C is equal to 60 minutes, 0.5C to 120 minutes and a 2C rating is equal to 30 minutes.
What is the 1C rating of a battery?
For example, the posted mAh of the battery is the 1C rating. If a battery is labeled 2000mAh, then its 1C rating is 2000mAh. To make this simple, the battery should provide 1C current for one hour.