Method and device for accurately displaying battery electric quantity of portable power source

Abstract

The invention discloses a method and device for accurately displaying the battery electric quantity of a portable power source. The device comprises a control circuit (200), a voltage detection circuit (80), a display circuit (400) and a current detection circuit. The method comprises the steps that an initial voltage of a battery (100) is collected through the voltage detection circuit (80), the control circuit (200) calculates the initial electric quantity according to the initial voltage, the current detection circuit collects a real-time circuit in a real-time mode, and the control circuit (200) calculates the changed electric quantity in a real-time mode according to the real-time current, calculates and updates the current electric quantity in a real-time mode according to the changed electric quantity on the basis of the initial electric quantity or the backup electric quantity, meanwhile, stores the current electric quantity to be the backup electric quantity, and finally controls the display circuit (400) to display the current electric quantity in a real-time mode. According to the method and device for accurately displaying the battery electric quantity of the portable power source, the electric quantity is calculated and obtained through the voltage value, the current value and the time value, large deviation caused by the fluctuation of the voltage value of the battery is not generated, and the problem that the difference between the electric quantity values of an existing portable power source is large is solved.

Description

technical field [0001] The invention relates to the field of mobile power sources, in particular to a method and device for accurately displaying battery power of a mobile power source. Background technique [0002] The battery power display of the existing mobile power supply uses the battery voltage as a reference. The display principle of the battery power is generally to read the voltage value of the battery through an analog-to-digital converter. Each voltage value corresponds to a power value, so that each voltage value corresponds to There is a large deviation in the battery power display for a power value, which is inconsistent with the actual power, and the wrong information affects the normal application of the user. In addition, the number of battery level LED indications is small, and it is difficult to know the specific capacity of the battery, which brings inconvenience to use. [0003] Concretely, in the prior art, the method of displaying power with the batt...

AI Technical Summary

Problems solved by technology

[0006] In the actual display process, use the voltage detection circuit to directly detect the voltage of the battery. When the battery voltage is detected to fall in the left-closed and right-open interval formed by the two voltages in the above table, the power corresponding to the smaller voltage value will be displayed. Percentage information, for example, if the detected battery voltage is 3.8V, it will display 20%, and because the voltage value error of the battery during charging and discharging is relatively large, the error of the displayed power will be relatively large

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