Storage battery detection apparatus and detection method thereof based on BUCK charger

Abstract

The invention relates to a storage battery detection apparatus and a detection method thereof based on a BUCK charger. The voltage value Uout of an output terminal of the BUCK charger is acquired in real time via a voltage acquisition module, and the output terminal of the BUCK charger is connected to a storage battery; the voltage value Uout of the output terminal of the BUCK charger and a storage battery low-voltage threshold Ulow are compared, and the storage battery is not connected to the BUCK charger if Uout<=Ulow; N output voltage values Uout of the BUCK charger acquired in real time are stored via a determination module, and the maximum Umax and the minimum Umin of the voltage values Uout of the output terminal of the BUCK charger are obtained; whether the difference between the maximum Umax and the minimum Umin of the voltage values of the output terminal of the BUCK charger is more than or equal to Uset is determined via the determination module, wherein Uset is a preset work voltage, and the storage battery is not connected to the BUCK charger if Umax-Umin>=Uset. The beneficial effects of the detection apparatus and the detection method thereof are that whether the connection of the storage battery is abnormal can be determined on-line, the determination method is simple, and real-time determination can be realized.

Description

technical field [0001] The invention relates to the field of storage battery detection, in particular to a storage battery detection device based on a BUCK charger and a detection method thereof. Background technique [0002] Under normal circumstances, there is always a DC voltage at the output terminal of the BUCK charger, which makes it difficult to make an effective judgment on whether the battery is connected or abnormal. If the load is cut off because the battery is not connected or abnormal, it will be a very serious problem. [0003] The existing patents for battery missing detection technology mainly include the following: [0004] There are two commonly used methods: [0005] (1) Using the battery discharge method, when the charging current of the battery is relatively small (or no current), the battery is forced to discharge, and the method of battery discharge is used to detect whether the battery is connected. The disadvantages of this method are obvious. One i...

AI Technical Summary

Problems solved by technology

This method has a disadvantage: the output voltage and current waveforms will appear intermittently, resulting in gaps in the output, and the control loop has to do corresponding processing such as turning off the drive.

There are problems: ① The detection device needs to have a charging current detection circuit; ② The charger must be turned off when testing, which makes it impossible for the UPS to use the charging voltage and battery voltage as power input alone, otherwise it will cause power interruption

There is also the problem that the UPS cannot use the charging voltage and battery voltage as power input alone after the charging is turned off, otherwise there is also the risk of power interruption

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