Device and method for obtaining battery capacity

Abstract

The invention provides a device and a method for obtaining battery capacity. The device comprises a collection module, an analyzing module, a comparison module, a processing module and a conversion module, wherein the collection module is used for collecting the voltage value of a battery; the analyzing module is used for analyzing the voltage change value of the battery within a first pre-set time range according to the collected voltage value; the comparison module is used for comparing the voltage change value with a pre-set change threshold; the processing module is used for taking the real-time collected voltage value as a display voltage according to the comparison result in the case that the voltage change value is less than the change threshold, or, taking an offset voltage value obtained by carrying out compensation deals to the voltage value as a display voltage; and the conversion module is used for converting the display voltage into the residual capacity of the battery. When the voltage change amount is more than the pre-set threshold, a special algorithm is adopted to carry out compensation calculation to the real-time monitored voltage value through the real-time monitoring to the voltage and voltage variation of the battery, so that inaccurate capacity display caused by over-high instant power consumption during the state of starting or accelerating or vain capacity of the battery is avoided.

Description

Technical field [0001] The present invention relates to battery monitoring technology, in particular, to a device and method for obtaining battery power. Background technique [0002] For the electricity meters on the market at this stage, the battery capacity is judged by the voltage level, and it is displayed in real time, that is, the voltage displayed by the meter is the battery real-time voltage: U display = U real. But a characteristic of the battery is that the greater the discharge current of the battery in the same state, the greater the voltage drop, that is, when the electric equipment is started or accelerated, the current is large and the voltage drop is large, and the indicator drops more. The battery runs out quickly. In addition, due to the virtual power, the full power is still displayed when the capacity is insufficient, and the battery capacity cannot be accurately indicated. [0003] Therefore, there is a need for a new battery power acquisition technology tha...

AI Technical Summary

Problems solved by technology

In addition, due to virtual power, when the capacity is insufficient, it will still display full power, and the battery capacity cannot be accurately indicated.

[0003] Therefore, a new battery power acquisition technology is needed, which can avoid the inaccurate power display caused by the instantaneous excessive power consumption during startup or acceleration, or the empty power of the battery.

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