How to see the discharge curve of a lead-acid battery?

Tag: How to see the discharge curve of a lead-acid battery? Learning to look at the discharge curve of lead-acid batteries is an important basis for the selection of lead-acid batteries. We can see from the graph how long the capacity of this battery can be discharged at a certain discharge current, and we can also see its termination voltage. Generally, there are two kinds of graphs on the market. One is to distinguish the discharge curve according to the capacity of the lead-acid battery, as shown in the figure below: This is the discharge curve with a capacity of 120A. If we discharge with a current of 120A, the power supply time is about 40 minutes. , The termination voltage is about 11.6-11.7V, which means that when the battery reaches such a voltage value, if the battery continues to be discharged, the battery will easily be scrapped. We can also see from this that the lower the discharge current of the battery, the higher its termination voltage. Another situation is to summarize the series of battery discharge conditions of this manufacturer, as shown in the figure below: It is different from the above by replacing the discharge current with C. In fact, the view is the same. C represents the capacity current of a lead-acid battery. For example, if this discharge curve is used on a 17AH lead-acid battery, then 1C will replace the 17A discharge current. The general way to view the discharge curve of a lead-acid battery is this, I hope it can be helpful
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