DC charging relay state detection device and method thereof and DC charging system

Abstract

The invention provides a DC charging relay state detection device and method thereof and a DC charging system, and belongs to the technical field of DC charging. The DC charging relay state detection device comprises a first line which is connected between a first high voltage bus and a second high voltage bus in a bridging way, wherein a first resistor unit and a third resistor unit are arranged on the first line in a series connection way; a second line which is connected between the first high voltage bus and the second high voltage bus in a bridging way, wherein a second resistor unit and a fourth resistor unit are arranged on the second line in a series connection way; a switch component of which the two ends are electrically connected on the first line between the first resistor unit and the third resistor unit and the second line between the second resistor unit and the fourth resistor unit; and a state acquisition component which is used for reading information representing voltage information of the first end or the second end of the switch component so as to judge the stage of a DC charging relay. The DC charging relay state detection device has the advantages of being accurate and reliable in state detection and simple in detection.

Description

technical field

[0001] The invention belongs to the technical field of direct current charging, and relates to a state detection device and a method thereof for a direct current charging relay, and a direct current charging system equipped with the state detection device. Background technique

[0002] Relays (also known as "contactors") are widely used in various circuits as a common controllable switching element. For example, they are used in the high-voltage DC charging circuit of the DC charging module of electric vehicles to control high-voltage DC charging. The turn-on and turn-off of the circuit controls the charging of the high-voltage power battery.

[0003] The high-voltage relay is mainly composed of the control part as the control end and the contact switch as the execution end. The small current signal of the control part controls whether the contact switch is connected to a large current, so as to realize the operation of using a small current to control a larg...

Examples

Embodiment Construction

[0059] The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the same reference numerals refer to the same elements or parts, and thus, their descriptions will be omitted.

[0060] Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and / or processor means and / or microcontroller means.

[0061] Herein, an elect...

technical field

[0001] The invention belongs to the technical field of direct current charging, and relates to a state detection device and a method thereof for a direct current charging relay, and a direct current charging system equipped with the state detection device. Background technique

[0002] Relays (also known as "contactors") are widely used in various circuits as a common controllable switching element. For example, they are used in the high-voltage DC charging circuit of the DC charging module of electric vehicles to control high-voltage DC charging. The turn-on and turn-off of the circuit controls the charging of the high-voltage power battery.

[0003] The high-voltage relay is mainly composed of the control part as the control end and the contact switch as the execution end. The small current signal of the control part controls whether the contact switch is connected to a large current, so as to realize the operation of using a small current to control a larg...

Examples

Embodiment Construction

[0059] The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the same reference numerals refer to the same elements or parts, and thus, their descriptions will be omitted.

[0060] Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and / or processor means and / or microcontroller means.

[0061] Herein, an elect...

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