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

A detection device and charger technology, which is applied to battery circuit devices, measuring devices, circuit devices, etc., can solve problems such as power interruption, intermittent output, and gaps, so as to achieve no damage to the battery and solve the problem of charger shutdown and judgment The effect of simple method

CN105006859AActive Publication Date: 2015-10-28KEHUA DATA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-10-28

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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.
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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...

Examples

Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] Such as Figure 1~4 As shown, this embodiment provides a battery detection device based on a BUCK charger, including a BUCK charger, the output end of the BUCK charger is connected to a battery, and the BUCK charger is composed of a switching device Q1, a continuous Composed of a freewheeling diode D1 and an inductor L1, the collector of the switching device Q1 is connected to the positive input terminal Bus+ of the BUCK charger, and the emitter of the switching device is respectively connected to the cathode of the freewheeling diode D1 and the One end of the inductance L1, the anode of the freewheeling diode D1 is connected to the negative input terminal Bus- of the BUCK charger, and the output terminal of the BUCK charger is connected in parallel with a virtual impedance circuit, and the virtual impedance circuit is composed of a capa...