Method and device for collecting single power supply voltage

Abstract

The disclosure relates to a method and apparatus for collecting a voltage of a single power supply. The method comprises: acquiring measurement voltages of a first single power supply and a second single power supply; carrying out calculation based on the measurement voltages of the first single power supply and the second single power supply to obtain an internal resistance of a resistor element; and carrying out calculation based on the internal resistance of the resistor element and the measurement voltages of the second single power supply to obtain an actual voltage of the second single power supply. Actual voltage collection of the single power supply of the cross-resistance element is realized and a problem of inaccurate voltage acquisition of the single power supply at the cross-resistance element is solved. Because a phenomenon that one chip only collects the voltage of the single power supply in one module is avoided, missed collection of the single battery supplies or chip resource wasting is prevented; the voltage of the resistor element does not need to be measured and thus the voltage number of collection by a slave control board does not increase, so that the load of the slave control board is reduced, the voltage acquisition harnesses of the slave control board are reduced, and thus the cost is saved.

Description

technical field [0001] The present disclosure relates to a battery voltage acquisition technology, in particular, to a method and device for acquiring a single power supply voltage. Background technique [0002] As we all know, when the slave control board collects the voltage of the single battery, when it collects the voltage across the resistance element, that is, the voltage of the single power supply connected to the ground wire with a resistance element (for example, a copper bar), if there is a current Through, due to the influence of the internal resistance voltage division of the resistance element, there will be a phenomenon that the voltage of the single power supply is incorrectly collected. [0003] In the prior art, when solving the problem of wrong collection of voltage of the single power supply across the resistance element, the collection method avoiding the resistance element is mostly used, and multiple single cells are allocated into different voltages a...

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Problems solved by technology

[0005] The purpose of this disclosure is to provide a method and device for collecting the voltage of a single power supply, to realize the collection of the actual voltage of the single power supply across the resistance element, and to solve the problem of inaccurate collection of the voltage of the single power supply at the cross-resistance element, because it is no longer a The chip only collects the voltage of the single power supply in a module, thus avoiding the situation of missing single power supply or waste of chip resources, and there is no need to measure the voltage of the resistance element, and there is no need to increase the number of voltages collected from the control board , so that the load on the slave control board is reduced, and the voltage collection harness of the slave control board is reduced, which can effectively save costs

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