Low-power-consumption battery capacity detection method

Abstract

The invention discloses a low-power-consumption battery capacity detection method, comprising the following steps: S10, detecting and updating battery capacity when sleep is wakened up; and S20, detecting and updating the battery capacity in a running state. The battery capacity is detected by adopting different detection methods when the sleep is waken up and when in the running state, and the adopted methods are a single-point average acquisition algorithm and a multipoint average acquisition algorithm combination respectively, so that test stability and reality of an acquired value are guaranteed. The former method acquires an initial value at a stable point when the sleep is wakened up, and the latter method acquires at multiple points in the running state. The method disclosed by theinvention adaptively detects capacities of two power supplies with different power supply features, namely a battery and a voltage-stabilized power supply, also supports a battery which can replace different capacities, supports low-power-consumption design and does not need to be run all the time.

Description

technical field [0001] The invention belongs to the field of electronic circuits, and in particular relates to a low power consumption battery power detection method. Background technique [0002] The detection of the battery power in the prior art includes three schemes. The first one is a direct battery voltage detection method, in which the level of the battery voltage represents the level of the battery power. circuit see figure 1 , after using low-cost resistor voltage divider, the battery voltage value is obtained after ADC sampling, and then converted into battery power according to the ratio of battery voltage deviation to obtain the battery power level of the system; the second method is the direct battery voltage detection look-up method, After using low-cost resistor voltage divider, the battery voltage value is obtained after ADC sampling, and then compared one by one according to the voltage reference table saved in the system to obtain the battery power level ...

AI Technical Summary

Problems solved by technology

Some schemes will compensate the voltage difference with a fixed value in the high-power state, but it will cause the power display to be too large when the voltage of the regulated power supply is tested, and it will not be able to adapt to the power supply with different characteristics; the third scheme must be used For a specified battery, the total power of this type of battery is known, or the total power of the battery can only be known after several deep charging and discharging processes, which cannot be applied to a replaceable dry battery power supply system. Reduced, and the power requirements of the resistor are relatively high, and the system software needs to detect the battery power all the time, and the power consumption of the system is always high, which is unacceptable for ultra-low power consumption systems

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