A method and apparatus for detecting wiring

Abstract

The application discloses a kind of wiring detection method and device, to solve the problem of wiring missing or misconnection between battery box and UPS.The application controls each battery unit to be in discharge state, controls the path for charging battery unit inside UPS unit to be disconnected, obtains the first voltage value of battery unit output end, controls the path for charging battery unit inside UPS unit to be turned on, obtains the second voltage value of battery unit output end, and judges whether the wiring between UPS unit and battery unit is correct according to the first voltage value and the second voltage value.If the wiring is correct, the first voltage value is approximately equal to the voltage across the battery in the battery unit, and the second voltage value is approximately equal to the charger output voltage in the UPS unit, so that the correctness of the wiring can be judged by the first voltage value and the second voltage value, and the stability and reliability of the system are improved without increasing the hardware cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power electronics, in particular to a wiring detection method and device. BACKGROUND

[0002] With the increasing maturity of lithium battery technology and the continuous decline in cost, the batteries matched with the UPS (Uninterrupted Power Supply) products are being transitioned from lead-acid batteries to lithium batteries. The current cooperation between the UPS products and the battery box is generally divided into single battery pack power supply and positive and negative battery pack power supply, and the power cable connection mode is shown in Figure 1 and Figure 2 . Among them, Figure 1 is the connection between the UPS and the single battery box; Figure 2 is the connection between the UPS and the positive and negative battery box.

[0003] In actual use, in order to increase the backup time of the system, lithium battery boxes are often used in parallel, and the power cable connection mode is shown in Figure 3 and Figure 4 . Among them, Figure 3 is the connection mode between the UPS and the single parallel battery box; Figure 4 is the connection mode between the UPS and the positive and negative parallel battery box.

[0004] At present, when there are many connections between the battery box and the UPS, there are missed connections or misconnections. SUMMARY

[0005] The present application provides a wiring detection method and device to solve the problem of missed connections or misconnections between the battery box and the UPS in the prior art.

[0006] In a first aspect, the present application provides a wiring detection method applied to a UPS power supply system, wherein the UPS power supply system comprises a UPS unit and at least one battery unit, and the method comprises the following steps:

[0007] For each battery unit, controlling the battery unit to be in a discharging state, and controlling the UPS unit to disconnect the path inside the UPS unit for charging the battery unit;

[0008] obtaining a first voltage value of an output end of the battery unit;

[0009] After controlling the UPS unit to turn on the path inside the UPS unit for charging the battery unit, obtaining a second voltage value of the output end of the battery unit;

[0010] According to the first voltage value and the second voltage value, it is judged whether the wiring between the UPS unit and the battery unit is correct.

[0011] In a possible implementation, the determining whether the wiring between the UPS unit and the battery unit is correct according to the first voltage value and the second voltage value comprises:

[0012] If the second voltage value is greater than the first voltage value, and the difference between the second voltage value and the first voltage value is greater than a preset threshold, it is determined that the wiring between the UPS unit and the battery unit is correct.

[0013] In a possible implementation, if it is determined that the wiring between the UPS unit and the battery unit is incorrect, an alarm operation is performed.

[0014] In a possible implementation, the battery unit comprises a storage battery, a charging relay and a discharging relay.

[0015] The controlling the battery unit in a discharging state comprises:

[0016] sending, to the battery unit, an instruction to disconnect the charging relay and connect the discharging relay, so that the storage battery is in a discharging state.

[0017] In a possible implementation, the at least one battery unit is connected in parallel.

[0018] In a second aspect, an embodiment of the present application provides a wiring detection device applied to a UPS power supply system, wherein the UPS power supply system comprises a UPS unit and at least one battery unit, and the device comprises:

[0019] a control module configured to control each battery unit in a discharging state, and control the UPS unit to disconnect a path for charging the battery unit in the UPS unit;

[0020] a first acquisition module configured to acquire a first voltage value of an output end of the battery unit;

[0021] a second acquisition module configured to acquire a second voltage value of the output end of the battery unit after the UPS unit is controlled to connect the path for charging the battery unit in the UPS unit;

[0022] a determination module configured to determine whether wiring between the UPS unit and the battery unit is correct according to the first voltage value and the second voltage value.

[0023] In a possible implementation, the determination module is specifically configured to:

[0024] If the second voltage value is greater than the first voltage value, and a difference between the second voltage value and the first voltage value is greater than a preset threshold, it is determined that the wiring between the UPS unit and the battery unit is correct.

[0025] In a possible implementation, the judging module is specifically configured to:

[0026] If the judging module determines that the wiring between the UPS unit and the battery unit is incorrect, an alarm operation is performed.

[0027] In a possible implementation, the battery unit comprises a storage battery, a charging relay and a discharging relay.

[0028] The control module is specifically configured to:

[0029] sending, to the battery unit, an instruction to disconnect the charging relay and to connect the discharging relay, so that the storage battery is in a discharging state.

[0030] In a possible implementation, the at least one battery unit is connected in parallel.

[0031] The present application has the following advantages:

[0032] The wiring detection method and device provided by the embodiments of the present application are used for each battery unit, first control the battery unit to be in a discharging state, and control the UPS unit to disconnect the path for charging the battery unit in the UPS unit, then acquire a first voltage value of an output end of the battery unit, then control the UPS unit to connect the path for charging the battery unit in the UPS unit, acquire a second voltage value of the output end of the battery unit, and finally determine whether the wiring between the UPS unit and the battery unit is correct according to a comparison result of the first voltage value and the second voltage value. Since the first voltage value and the second voltage value are voltage values of the output end of the battery unit, if the wiring is correct, the first voltage value is approximately equal to a voltage value between two batteries in the battery unit, and the second voltage value is approximately equal to a voltage value of a power supply for charging the battery unit in the UPS unit, so that whether the wiring between the battery unit and the UPS unit is correct can be determined through the first voltage value and the second voltage value, and the stability and reliability of the system are improved without increasing the hardware cost. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0034] Figure 1 This is a schematic diagram of the connection between the UPS and a single battery box provided in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the connection between the UPS and the positive and negative battery packs provided in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the connection between a UPS and a single parallel battery box provided in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the connection between the UPS and the positive and negative parallel battery box provided in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the internal structure of the UPS and the positive and negative battery units provided in an embodiment of the present invention;

[0039] Figure 6 This is a flowchart illustrating a wiring detection method provided in an embodiment of the present invention;

[0040] Figure 7 This is a complete flowchart of a wiring detection method provided by an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of a wiring detection device provided in an embodiment of the present invention. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0043] Given that existing technologies involve numerous cables connecting the battery box and UPS when used in parallel, there is a risk of missing or incorrect cable connections. This invention provides a wiring detection solution to address this issue and improve system performance.

[0044] The wiring detection scheme provided in this embodiment of the invention is applied to a UPS power supply system, which includes a UPS unit and at least one battery unit.

[0045] The UPS unit in this application will be briefly introduced below.

[0046] like Figure 5As shown, the connection of the UPS with the positive and negative battery units is taken as an example for illustration, and the connection of the UPS with the single battery box is taken as a reference Figure 5 The present application will not be described again.

[0047] Figure 5 The UPS part in the figure:

[0048] 1. Charger: including positive charger and negative charger, which is the circuit inside the UPS, and charges the batteries in the positive battery box and the batteries in the negative battery box.

[0049] 2. Monitor: the man-machine interface of the UPS, which is responsible for displaying or setting some parameters of the UPS, and has the function of communicating with the outside, which can be regarded as a chip with processing and communication functions.

[0050] 3. DSP (Digital Signal Processor): which has the functions of communicating with the monitor, controlling the charger and relay in the UPS unit.

[0051] 4. Charger relay: shown as KM5 and KM6 in the figure, which can provide charging power for the battery box when turned on, and stop providing charging power for the battery box when turned off, which is an internal element of the UPS.

[0052] Battery box part:

[0053] 1. Charging relay: Figure 5 KM1 and KM3 in the figure, wherein KM1 and D2 form a charging circuit, and KM3 and D4 form a charging circuit.

[0054] 2. Discharge relay: Figure 5 KM2 and KM4 in the figure, wherein KM2 and D1 form a discharge circuit, and KM4 and D3 form a discharge circuit.

[0055] The communication between the UPS and the battery box can be RS458 communication, so as to complete the data communication between the UPS and the battery box, and execute corresponding logical actions according to the data communication content.

[0056] Next, a wiring detection method disclosed in an embodiment of the present application will be introduced.

[0057] As shown in Figure 6 The present embodiment provides a wiring detection method, which is applied to a UPS power supply system, the UPS power supply system comprising a UPS unit and at least one battery unit, and the method comprises the following steps:

[0058] S601, for each battery unit, control the battery unit to be in a discharge state, and control the UPS unit to disconnect the path inside the UPS unit for charging the battery unit;

[0059] S602, acquire a first voltage value of the battery unit output end;

[0060] S603, after controlling the UPS unit to turn on the path inside the UPS unit for charging the battery unit, acquire a second voltage value of the battery unit output end;

[0061] S604, according to the comparison result of the first voltage value and the second voltage value, judge whether the wiring between the UPS unit and the battery unit is correct.

[0062] The wiring detection method provided by the embodiment of the present application is that, for each battery unit, firstly, the battery unit is controlled to be in a discharging state, and the UPS unit is controlled to be disconnected from the path inside the UPS unit for charging the battery unit, then the first voltage value of the battery unit output end is acquired, then the UPS unit is controlled to be turned on from the path inside the UPS unit for charging the battery unit, the second voltage value of the battery unit output end is acquired, and finally, according to the comparison result of the first voltage value and the second voltage value, whether the wiring between the UPS unit and the battery unit is correct is judged. Since the wiring is correct, the first voltage value is the voltage value of the disconnection of the path between the UPS unit and the battery unit, which is approximately equal to the voltage value of the battery, and the second voltage value is the voltage value of the turn-on of the path between the UPS unit and the battery unit, which is approximately equal to the voltage value of the power supply for charging the battery unit in the UPS unit, so whether the wiring between the UPS unit and the battery unit is correct can be judged through the comparison result of the first voltage value and the second voltage value, and the stability and reliability of the system are improved without increasing the hardware cost.

[0063] The UPS unit in the embodiment of the present application is the UPS in Figure 5 , and the battery unit is the battery box in Figure 5 .

[0064] The present application includes at least one battery unit in the embodiment, and the at least one battery unit can be connected in parallel.

[0065] The multiple battery units connected in parallel and the UPS unit are connected, and since each battery unit has two power cables connected with the UPS unit, there are many cables, which can cause the situation of missing connection or wrong connection due to too many cables.

[0066] Referring to Figure 5 , the voltage of the battery unit output end is acquired in the embodiment of the present application, that is, the voltage of the battery box output end in Figure 5 .

[0067] The battery unit in the embodiment of the application can include a storage battery, a charging relay and a discharging relay, the battery unit is controlled to be in a discharging state, instructions of opening the charging relay and closing the discharging relay are sent to the battery unit, and the storage battery is in the discharging state.

[0068] Referring to Figure 5 Taking the positive battery box as an example, instructions of closing the KM1 and opening the KM2 are sent to the BMS (Battery Management System) in the positive battery box, the BMS receives the instructions, controls the KM1 to be opened and the KM2 to be closed, and the storage battery is in the discharging state.

[0069] The UPS unit is controlled to open a path for charging the battery unit in the UPS unit, referring to Figure 5 Taking the positive battery box as an example, the UPS unit is controlled to open the KM5.

[0070] Referring to Figure 5 When the KM1 is opened, the KM2 is closed, and the KM5 is opened, the first voltage value obtained is approximately equal to the voltage between the storage battery in the positive battery box.

[0071] After the first voltage value is obtained, the UPS unit is controlled to be conducted, and a path for charging the battery unit in the UPS unit is opened, referring to Figure 5 That is, the KM5 is closed.

[0072] Referring to Figure 5 When the KM1 is opened, the KM2 is closed, and the KM5 is closed, if the connection between the UPS unit and the battery unit is correct, the second voltage value obtained is approximately equal to the voltage value output by the positive charger in the UPS.

[0073] Since the positive charger charges the battery in the positive battery box, the voltage value output by the positive charger is higher than the voltage value output by the battery in the battery box, if the cable between the positive battery box and the positive charger is not connected, the first voltage value obtained is equal to the second voltage value, which is approximately equal to the voltage between the battery in the positive battery box, if the cable between the positive battery box and the positive charger in the positive battery box is correctly connected, the first voltage value obtained is approximately equal to the voltage between the battery in the positive battery box, and the second voltage value obtained is approximately equal to the voltage value output by the positive charger in the UPS. Therefore, whether the connection between the UPS unit and the battery unit is correct can be determined according to the comparison result of the two voltage values.

[0074] It should be noted that the battery voltage can be transmitted to the monitor through communication, and the monitor transmits the battery voltage to the DSP again, and the DSP knows the battery voltage, and then controls the charger to output a voltage higher than the battery voltage.

[0075] If it is determined that the connection between the UPS unit and the battery unit is incorrect, an alarm operation can be performed.

[0076] If it is determined that the connection between the UPS unit and the battery unit is incorrect, an alarm operation can be performed.

[0077] In a specific implementation, a plurality of battery units can be sequentially detected, and each battery unit can correspond to an alarm device. If it is detected that the connection between the battery unit and the UPS unit is incorrect, the alarm device corresponding to the battery unit is controlled to perform an alarm.

[0078] The overall flow of the connection detection method disclosed in the present application will be described below with Figure 7 For example, as shown in the figure, the overall flowchart of the connection detection method provided by the embodiment of the present application is shown. Figure 8

[0079] S701, monitoring the DSP to issue a charger command.

[0080] S702, the DSP turns off the charger and uploads the charger closed flag.

[0081] Turning off the charger can be disconnecting the relay KM5 and the relay KM6.

[0082] S703, after receiving the charger closed flag, the monitoring broadcasts the battery box to issue a positive charging relay disconnection and a positive discharge relay closure command.

[0083] S704, the battery box disconnects the positive charging relay KM1, closes the positive discharge relay KM2, uploads the first voltage value of the battery box port to the monitoring, and the monitoring saves the first voltage value.

[0084] S705, the monitoring issues an open positive charger command to the DSP.

[0085] S706, the DSP opens the positive charger and uploads the positive charger open flag.

[0086] Opening the positive charger can be closing the relay KM5.

[0087] S707, the battery box uploads the second voltage value of the battery box port to the monitoring.

[0088] S708, the monitoring compares the second voltage value and the first voltage value. If the second voltage value is greater than the first voltage value, and the difference between the second voltage value and the first voltage value is greater than the threshold value, it is determined that the positive battery box cable connection is normal, otherwise the connection is abnormal. ​

[0089] S709, monitoring sending a close positive charger command to the DSP.

[0090] S710, the DSP closes the positive charger.

[0091] S711, monitoring sending a negative charging relay disconnection and negative discharge relay closure command to the battery box.

[0092] S712, the battery box disconnects the negative charging relay KM3, closes the negative discharge relay KM4, uploads the third voltage value of the battery box port to the monitoring, and the monitoring saves the third voltage value.

[0093] S713, the monitoring sends an open negative charger command to the DSP.

[0094] S714, the DSP opens the negative charger and uploads the negative charger open flag.

[0095] Opening the negative charger can close the relay KM6.

[0096] S715, the battery box uploads the fourth voltage value of the battery box port to the monitoring;

[0097] S716, the monitoring compares the fourth voltage value and the third voltage value, if the fourth voltage value is greater than the third voltage value, and the difference between the fourth voltage value and the third voltage value is greater than the threshold value, it is determined that the negative battery box cable connection is normal, otherwise the connection is abnormal.

[0098] S717, reporting the detected abnormal battery box and ending the detection.

[0099] Based on the same inventive concept, the embodiment of the present application also provides a wiring detection device.

[0100] As shown in ​ , a wiring detection device provided by the embodiment of the present application is applied to a UPS power supply system, the UPS power supply system includes a UPS unit and at least one battery unit, and the device includes:

[0101] A control module 801 is configured to control each battery unit to be in a discharge state, and control the UPS unit to disconnect a path for charging the battery unit inside the UPS unit.

[0102] A first acquisition module 802 is configured to acquire a first voltage value of an output end of the battery unit.

[0103] A second acquisition unit 803 is configured to acquire a second voltage value of the output end of the battery unit after controlling the UPS unit to turn on the path for charging the battery unit inside the UPS unit.

[0104] The judging module 804 is configured to judge whether the wiring between the UPS unit and the battery unit is correct according to the first voltage value and the second voltage value.

[0105] In a possible implementation, the judging module 804 is specifically configured to:

[0106] If the second voltage value is greater than the first voltage value, and the difference between the second voltage value and the first voltage value is greater than a preset threshold, it is determined that the wiring between the UPS unit and the battery unit is correct.

[0107] In a possible implementation, the judging module 804 is specifically configured to:

[0108] If the judging module determines that the wiring between the UPS unit and the battery unit is incorrect, an alarm operation is performed.

[0109] In a possible implementation, the battery unit includes a storage battery, a charging relay and a discharging relay.

[0110] The control module 801 is specifically configured to:

[0111] sending, to the battery unit, an instruction to disconnect the charging relay and to connect the discharging relay, so that the storage battery is in a discharging state.

[0112] In a possible implementation, the at least one battery unit is connected in parallel.

[0113] The above describes the application with reference to the block diagrams and / or flowcharts of the methods, apparatuses (systems) and / or computer program products according to the embodiments of the application. It should be understood that one block of the block diagrams and / or flowcharts and a combination of the blocks of the block diagrams and / or flowcharts can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer and / or other programmable data processing apparatus, to produce a machine, so that the instructions executed by the computer processor and / or other programmable data processing apparatus create a method for implementing the functions / acts specified in the blocks of the block diagrams and / or flowcharts.

[0114] Accordingly, the present application can be embodied in hardware and / or in software (including firmware, resident software, micro-code, etc.) Furthermore, the present application can take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium can be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

[0115] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A wiring detection method applied to an uninterruptible power supply (UPS) power supply system, the UPS power supply system comprising a UPS unit and at least one battery unit, characterized in that, The method comprises: For each battery unit, controlling the battery unit to be in a discharging state, and controlling the UPS unit to disconnect a path inside the UPS unit for charging the battery unit; Obtaining a first voltage value of an output end of the battery unit; After controlling the UPS unit to turn on the path inside the UPS unit for charging the battery unit, obtaining a second voltage value of the output end of the battery unit; According to the first voltage value and the second voltage value, determining whether wiring between the UPS unit and the battery unit is correct.

2. The method of claim 1, wherein, The determination whether the wiring between the UPS unit and the battery unit is correct according to the first voltage value and the second voltage value comprises: If the second voltage value is greater than the first voltage value, and a difference between the second voltage value and the first voltage value is greater than a preset threshold, it is determined that the wiring between the UPS unit and the battery unit is correct.

3. The method of claim 2, wherein, If it is determined that the wiring between the UPS unit and the battery unit is incorrect, an alarm operation is performed.

4. The method of claim 1, wherein, The battery unit comprises a storage battery, a charging relay and a discharging relay; The control of the battery unit to be in the discharging state comprises: Sending an instruction of disconnecting the charging relay and closing the discharging relay to the battery unit, so that the storage battery is in the discharging state.

5. The method of claim 1, wherein, The at least one battery unit is connected in parallel.

6. A wiring detection device applied to an uninterruptible power supply (UPS) power supply system, the UPS power supply system comprising a UPS unit and at least one battery unit, characterized in that, The device comprises: A control module configured to, for each battery unit, control the battery unit to be in a discharging state, and control the UPS unit to disconnect a path inside the UPS unit for charging the battery unit; A first obtaining module configured to obtain a first voltage value of an output end of the battery unit; A second obtaining module configured to, after controlling the UPS unit to turn on the path inside the UPS unit for charging the battery unit, obtain a second voltage value of the output end of the battery unit; A determination module configured to determine whether wiring between the UPS unit and the battery unit is correct according to the first voltage value and the second voltage value.

7. The apparatus of claim 6, wherein, The determination module is specifically configured to: If the second voltage value is greater than the first voltage value, and a difference between the second voltage value and the first voltage value is greater than a preset threshold, it is determined that the wiring between the UPS unit and the battery unit is correct.

8. The apparatus of claim 7, wherein, The determination module is specifically configured to: If the determination module determines that the wiring between the UPS unit and the battery unit is incorrect, an alarm operation is performed.

9. The apparatus of claim 6, wherein, The battery unit comprises a storage battery, a charging relay and a discharging relay; The control module is specifically configured to: Send an instruction of disconnecting the charging relay and closing the discharging relay to the battery unit, so that the storage battery is in the discharging state.

10. The apparatus of claim 6, wherein, The at least one battery unit is connected in parallel.

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