CN-121978575-A - Grounding detection device of charging and replacing cabinet and charging and replacing cabinet

Abstract

The invention provides a grounding detection device of a charging and replacing cabinet and the charging and replacing cabinet, wherein the device comprises a first detection loop and a second detection loop; the first detection loop comprises a first diode, a first resistance unit and a first light-emitting diode which are sequentially connected in series, the input end of the first detection loop is connected with the live wire access end of the mains supply, the output end of the first detection loop is connected with the grounding end of the charging and replacing cabinet, the second detection loop comprises a second diode, a second resistance unit and a second light-emitting diode which are sequentially connected in series, the input end of the second detection loop is connected with the zero line access end of the mains supply, the output end of the second detection loop is connected with the grounding end of the charging and replacing cabinet, and the first detection loop and the second detection loop are used for indicating the grounding state of the charging and replacing cabinet. The on-site maintenance personnel can rapidly judge whether the grounding is good or not only by visually detecting the on-off state of the light emitting diode, the on-site detection process is greatly simplified, and the detection efficiency of the grounding fault of the charging and replacing cabinet is improved.

Inventors

• YANG RUI
• CHEN XINGBAO
• LI CHAOCHAO
• QIAN JIANAN

Assignees

• 武汉小安智能科技有限公司

Dates

Publication Date

20260505

Application Date

20251231

Claims (10)

1. 1. The grounding detection device of the charging cabinet is characterized by comprising a first detection loop and a second detection loop; the first detection loop comprises a first diode, a first resistor unit and a first light-emitting diode which are sequentially connected in series, wherein the input end of the first detection loop is connected with a live wire access end of mains supply, and the output end of the first detection loop is connected with a grounding end of a charging and replacing cabinet; the second detection loop comprises a second diode, a second resistor unit and a second light-emitting diode which are sequentially connected in series, wherein the input end of the second detection loop is connected with a zero line access end of mains supply, and the output end of the second detection loop is connected with a grounding end of a charging and replacing cabinet; the first detection loop and the second detection loop are used for indicating the grounding state of the charging cabinet.
2. 2. The ground detection device of the battery charging and changing cabinet according to claim 1, further comprising a power indication loop; The power indication circuit comprises a third light emitting diode, a third resistor unit and a third diode which are sequentially connected in series, wherein the input end of the power indication circuit is connected with a zero line access end of the mains supply, and the output end of the power indication circuit is connected with a live wire access end of the mains supply; the power indication loop is used for indicating the power supply state of the mains supply and is used as a ground state reference standard of the first detection loop and the second detection loop.
3. 3. The ground detection device of a charging cabinet according to claim 2, wherein the first detection loop, the second detection loop, and the power indication loop are configured to indicate a ground state of the charging cabinet by: When the third light emitting diode in the power supply indication loop is in a lighting state and the first light emitting diode in the first detection loop is in the lighting state, the charging cabinet is indicated to be normally grounded; And when the third light emitting diode in the power supply indication loop is in a lighting state and the first light emitting diode in the first detection loop is in a extinguishing state, indicating that the charging cabinet is abnormal in grounding.
4. 4. The ground detection device of the battery charging and replacing cabinet according to claim 1, further comprising a signal isolation module; the input end of the signal isolation module is connected with the cathode of the first diode, and the output end of the signal isolation module is used for outputting a level signal of the grounding state of the charging cabinet.
5. 5. The ground detection device of a battery charging cabinet of claim 4, wherein the signal isolation module comprises a photo coupler; The first input end of the photoelectric coupler is used as the input end of the signal isolation module, the second input end of the photoelectric coupler is connected with the grounding end of the charging cabinet, the first output end of the photoelectric coupler is used as the output end of the signal isolation module, and the second output end of the photoelectric coupler is grounded.
6. 6. The ground detection device of a charging cabinet according to claim 5, wherein the optocoupler is specifically configured to: under the condition that the grounding of the charging and replacing cabinet is normal, the first detection loop forms a loop through the grounding end of the charging and replacing cabinet, and the photoelectric coupler is conducted, so that a first voltage threshold value is output by a first output end of the photoelectric coupler; Under the condition that the grounding of the charging cabinet is abnormal, the first detection loop cannot form a loop, and the photoelectric coupler is cut off, so that the first output end of the photoelectric coupler outputs a second voltage threshold value; Wherein the first voltage threshold is less than the second voltage threshold.
7. 7. The ground detection device of the battery charging and replacing cabinet according to claim 4, further comprising a voltage comparison module; the input end of the voltage comparison module is connected with the output end of the signal isolation module, and is used for receiving the level signal output by the output end of the signal isolation module and outputting low level or high level based on the level signal.
8. 8. The ground detection device of a charging cabinet according to claim 7, wherein the voltage comparison module is specifically configured to: Receiving a level signal output by the output end of the signal isolation module; comparing the voltage value of the level signal with a reference voltage, and outputting a first logic level under the condition that the voltage value of the level signal is smaller than the reference voltage; And outputting a second logic level when the voltage value of the level signal is greater than or equal to the base reference voltage.
9. 9. The ground detection device of the battery charging and replacing cabinet according to claim 8, further comprising a main control unit; The main control unit is connected with the output end of the voltage comparison module and is used for: Under the condition that the received output level of the voltage comparison module is the first logic level, determining that the charging cabinet is normally grounded; And under the condition that the received output level of the voltage comparison module is the second logic level, determining that the charging cabinet is abnormal in grounding.
10. 10. A charging cabinet comprising a ground detection device of the charging cabinet according to any one of claims 1 to 9.

Description

Grounding detection device of charging and replacing cabinet and charging and replacing cabinet Technical Field The invention relates to the technical field of electrical measurement, in particular to a grounding detection device of a charging and replacing cabinet and the charging and replacing cabinet. Background The charging and battery-changing cabinet is a device for charging or changing the battery of the vehicle. The grounding device of the charging cabinet is the core of equipment safety, and the reliability of the grounding device directly influences the stable operation of the equipment and the safety of personnel. Reliable grounding can safely guide fault current into the ground to prevent the equipment shell from being electrified, thereby avoiding personnel electric shock and equipment damage. In the prior art, for the grounding detection process of the charging cabinet, whether the charging cabinet is abnormally grounded or not is generally determined based on field test of technicians. Based on the mode that the technicians carried out the determination, need the technicians to carry out the investigation based on professional equipment, detection efficiency is lower. Disclosure of Invention The invention provides a grounding detection device of a charging and replacing cabinet and the charging and replacing cabinet, which are used for improving the grounding detection efficiency of the charging and replacing cabinet. The invention provides a grounding detection device of a charging cabinet, which comprises a first detection loop and a second detection loop; the first detection loop comprises a first diode, a first resistor unit and a first light-emitting diode which are sequentially connected in series, wherein the input end of the first detection loop is connected with a live wire access end of mains supply, and the output end of the first detection loop is connected with a grounding end of a charging and replacing cabinet; the second detection loop comprises a second diode, a second resistor unit and a second light-emitting diode which are sequentially connected in series, wherein the input end of the second detection loop is connected with a zero line access end of mains supply, and the output end of the second detection loop is connected with a grounding end of a charging and replacing cabinet; the first detection loop and the second detection loop are used for indicating the grounding state of the charging cabinet. The invention provides a grounding detection device of a charging cabinet, which further comprises a power supply indication loop; The power indication circuit comprises a third light emitting diode, a third resistor unit and a third diode which are sequentially connected in series, wherein the input end of the power indication circuit is connected with a zero line access end of the mains supply, and the output end of the power indication circuit is connected with a live wire access end of the mains supply; the power indication loop is used for indicating the power supply state of the mains supply and is used as a ground state reference standard of the first detection loop and the second detection loop. According to the grounding detection device of the charging cabinet, provided by the invention, the first detection loop, the second detection loop and the power indication loop are used for indicating the grounding state of the charging cabinet in the following manner: When the third light emitting diode in the power supply indication loop is in a lighting state and the first light emitting diode in the first detection loop is in the lighting state, the charging cabinet is indicated to be normally grounded; And when the third light emitting diode in the power supply indication loop is in a lighting state and the first light emitting diode in the first detection loop is in a extinguishing state, indicating that the charging cabinet is abnormal in grounding. The invention provides a grounding detection device of a charging cabinet, which further comprises a signal isolation module; the input end of the signal isolation module is connected with the cathode of the first diode, and the output end of the signal isolation module is used for outputting a level signal of the grounding state of the charging cabinet. According to the grounding detection device of the charging and replacing cabinet, the signal isolation module comprises a photoelectric coupler; The first input end of the photoelectric coupler is used as the input end of the signal isolation module, the second input end of the photoelectric coupler is connected with the grounding end of the charging cabinet, the first output end of the photoelectric coupler is used as the output end of the signal isolation module, and the second output end of the photoelectric coupler is grounded. According to the grounding detection device of the charging and replacing cabinet, the photoelectric coupler is particularly used for: under th