Detection circuit, detection method and application device

Abstract

The invention provides a detection circuit, a detection method and an application device which are applied to the technical field of direct current charging. The circuit comprises a first detection module, a second detection module and a third detection module, wherein the first detection module and the third detection module are connected in series to form a series branch, the obtained series branch is connected between the output end of a positive bus switch and the output end of a negative bus switch in series, one end of the second detection module is connected with a series connection point of the first detection module and the third detection module, the other end of the second detection module is connected with the input end of the positive bus switch or the input end of the negative bus switch, and the connection state of the first detection module and the third detection module is controllable. The detection personnel can change the connection relation between the detection modules according to the connection state of the bus switch in cooperation with control over the connection state of the first detection module and the connection state of the third detection module, then voltages corresponding to the detection modules are changed, and compared with the prior art, the circuit structure is more simplified.

Description

Technical field[0001]The present invention relates to the field of DC charging technology, and more particularly to a detecting circuit, a detection method, and an application device.Background technique[0002]In the prior art, the DC charging pile is connected in series to the bus switch to the electric vehicle output electrical energy, specifically, including the positive electrode buswriter and the negative electrode bus switch. Accordingly, there is a corresponding interface switch inside the electric vehicle charging interface, After the charging interface of the electric vehicle is connected to the DC charging pile, the DC charging pile can be charged to the power battery of the electric vehicle through the mating control of the bus switch and the interface switch.[0003]According to the relevant industry standards in the new energy vehicle, the battery voltage of the power battery needs to be measured before charging the electric vehicle. At the same time, it is necessary to de...

AI Technical Summary

Problems solved by technology

However, the inventor found that the basic principles of the adhesion detection of the bus switch and the battery voltage measurement are similar, and setting up independent adhesion detection circuits and battery voltage measurement circuits will undoubtedly increase the production cost of the DC charging pile.

Images