A loss prevention device, a use method and a method for cutting off power supply of a battery of a city rail vehicle

Abstract

The application discloses a kind of anti-loss electric device, use method and urban rail vehicle battery power-off method, the anti-loss electric device includes power supply module, battery voltage detection module and alarm module, the device is monitored train battery voltage on line, and control vehicle automatic power-off, play the role of battery anti-loss electricity, can detect 110V battery voltage, 24V battery voltage, increase the versatility of equipment, and can be applicable to general voltage detection of electrical equipment;Adopt battery power supply mode, further improve the portability of equipment, still usable for the scene that cannot be connected to external power supply;Utilize the device to prevent loss of battery voltage detection, greatly reduce manpower, material resources, time cost, improve production and verification efficiency.

Description

Technical Field

[0001] This invention relates to a power loss prevention device, its usage method, and a method for disconnecting the battery of an urban rail vehicle. Background Technology

[0002] Storage batteries enable urban rail vehicles to operate without external power supply and provide stable voltage to DC load equipment. When a train malfunctions and cannot be powered externally, the batteries can power emergency lighting, train communication systems, headlights and taillights at both ends of the train, emergency ventilation, and train door operation.

[0003] Because high-voltage work is not permitted during the commissioning of urban rail vehicles at the company's factory, personnel must power the vehicles via batteries. System commissioning can only proceed after all vehicle systems are powered normally. However, battery voltage is limited, requiring constant monitoring of battery charge to prevent vehicle malfunction due to low battery levels. The company lacks dedicated battery charging equipment; when batteries are depleted, the entire battery pack must be removed and sent back to the battery supplier for charging before being reinstalled on the vehicles. This process delays production and increases the consumption of manpower, resources, and capital. Against this backdrop, this application is hereby submitted. Summary of the Invention

[0004] The purpose of this invention is to provide a battery voltage protection device that can effectively detect the battery voltage and generate a power-off command, thereby preventing battery voltage loss and having versatility.

[0005] Therefore, the power loss prevention device provided by the present invention includes:

[0006] A battery voltage detection module includes a first input terminal +, a first input terminal -, a power supply terminal +, a power supply terminal -, and an output terminal. A detection switch is connected in series on the input line connected to the first input terminal +. The input lines connected to the first input terminal + and the first input terminal - are used to connect to the bus voltage line of the battery of the device under test.

[0007] The power-off command line includes a terminal A and a terminal B. Terminal A is used for power-off signal source input, and terminal B is used as the output of the device to connect to the input terminal of the central processing unit of the device under test. A first power-off switch 06-S3 is connected in series between terminal A and terminal B.

[0008] The power-off control switch includes a relay 05-K01, the coil of which is connected in series between the power supply terminal and the output terminal of the battery voltage detection module, and the contacts are connected in series between terminal A and terminal B.

[0009] The alarm is connected to the output terminal of the battery voltage detection module via alarm switch 06-S4;

[0010] The power conversion module includes an input terminal +, an input terminal -, an output terminal +, and an output terminal -. A first power supply switch is connected in series on the input line connected to the input terminal +. The input terminals + and - serve as the first set of power input terminals for power supplies with voltages higher than 24V, converting voltages higher than 24V into 24V DC voltage. The output terminals + and - are respectively connected to the power terminals + and - of the battery voltage detection module, providing operating voltage to the battery voltage detection module.

[0011] The second set of power input terminals is used for 24V power input, including a 24V power input terminal + and a 24V power input terminal -. The 24V power input terminal + is connected to the power input terminal + of the battery voltage detection module via the second power supply switch, and the 24V power input terminal - is connected to the power input terminal - of the battery voltage detection module.

[0012] The positive terminal of the battery is connected to the power supply terminal + of the battery voltage detection module via a third power supply switch, and the negative terminal is directly connected to the power supply terminal - of the battery voltage detection module, so as to directly provide the working voltage to the battery voltage detection module.

[0013] When the device is used for a device under test that can provide a voltage higher than 24V, the following setup should be performed:

[0014] 1) Close the first power-off switch 06-S3, or close the first power-off switch 06-S3 and the alarm switch 06-S4;

[0015] 2) Connect the + and - input terminals of the power conversion module to the power supply terminal of the testing equipment; connect the input line connected to the first input terminal + and the input line connected to the first input terminal - to the battery bus voltage line of the testing equipment; connect terminal B to the input terminal of the central processing unit of the device under test;

[0016] After setup, close the first power supply switch and detection switch to power on the battery voltage detection module and acquire the voltage on the bus voltage line of the battery of the device under test as the sampling voltage. Compare the sampling voltage with a preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, the coil of the relay 05-K01 is energized, the contacts are closed, and a power-off command is generated at terminal B of the power-off command line and input to the central processing unit of the device under test. When the alarm switch 06-S4 is closed, the alarm will sound when the sampling voltage is less than the preset voltage threshold.

[0017] When the device is used for a device under test that can provide 24V voltage, the following setup should be performed:

[0018] 1) Close the first power-off switch 06-S3, or close the first power-off switch 06-S3 and the alarm switch 06-S4;

[0019] 2) Connect the 24V power input terminal + and the 24V power input terminal - to the power supply terminal of the testing equipment respectively; connect the input line connected to the first input terminal + and the input line connected to the first input terminal - to the battery bus voltage line of the testing equipment respectively; connect terminal B to the input terminal of the central processing unit of the device under test;

[0020] After setup, close the second power supply switch and detection switch to power on the battery voltage detection module and acquire the voltage on the bus voltage line of the battery of the device under test as the sampling voltage. Compare this voltage with a preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, the output terminal of the battery voltage detection module will have an output. When this output is present, the coil of the relay 05-K01 will be energized, the contacts will be closed, and a power-off command will be generated at terminal B of the power-off command line and input to the central processing unit of the device under test. When the alarm switch 06-S4 is closed, the alarm will sound when the sampling voltage is less than the preset voltage threshold.

[0021] When the device is used for a device under test that cannot be powered, the following setup should be performed:

[0022] 1) Close the alarm switch 06-S4, or close the first power-off switch 06-S3 and the alarm switch 06-S4;

[0023] 2) The input line connected to the first input terminal + and the input line connected to the first input terminal - are respectively connected to the battery bus voltage line of the testing equipment; or, the input line connected to the first input terminal + and the input line connected to the first input terminal - are respectively connected to the battery bus voltage line of the testing equipment, and the B terminal is connected to the input terminal of the central processing unit of the device under test;

[0024] After the setup is complete, close the third power supply switch and the detection switch to power on the battery voltage detection module and obtain the voltage on the bus voltage line of the battery of the device under test as the sampling voltage. Compare it with the preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, the alarm will sound. When the first power-off switch 06-S3 is closed and the B terminal is connected to the input terminal of the central processing unit of the device under test, when the sampling voltage is less than the preset voltage threshold, the coil of the relay 05-K01 is energized, the contacts are closed, and a power-off command is generated on the B terminal of the power-off command line and input to the central processing unit of the device under test.

[0025] In some embodiments, the anti-power loss device provided by the present invention further includes an isolation diode, which is configured to be connected in one or all of the following locations:

[0026] 1) On the input line connected to the input terminal, the cathode is connected to the first power supply switch;

[0027] 2) On the input line connected to the first input terminal, the cathode is connected to the detection switch;

[0028] 3) Connected in the forward direction between terminal A and relay 05-K01;

[0029] 4) On the input line connected to the 24V power supply terminal, the cathode is connected to the second power supply switch.

[0030] In some embodiments, the anti-power-loss device provided by the present invention further includes a charging management circuit, which includes a charging switch and a charger. One end of the charging switch and the negative terminal of the battery are respectively connected to the charger, and the other end of the charging switch is connected to the anode of the battery.

[0031] In some embodiments, the anti-power-loss device provided by the present invention further includes a charging indicator switch 05-S7 and a charging indicator light 05-H2. One end of the charging indicator switch 05-S7 is connected to the end of the charging switch connected to the charger, and the other end is connected to the negative terminal of the battery via the charging indicator light 05-H2.

[0032] In some embodiments, the anti-power loss device provided by the present invention further includes a voltage detection switch 06-S6 and a voltmeter, wherein the voltage detection switch 06-S6 and the voltmeter are connected in series and then in parallel across the two ends of the battery.

[0033] In some embodiments, the anti-power-loss device provided by the present invention further includes a battery power supply indicator switch 06-S10 and a battery power supply indicator light 05-H1. One end of the battery power supply indicator switch 06-S10 is connected to the positive terminal of the battery, and the other end is connected to the negative terminal of the battery via the battery power supply indicator light 05-H1.

[0034] The second objective of this invention is to provide a method of using the anti-power-loss device provided in this application. This device is used for a device under test that can provide a voltage higher than 24V, a device under test that can provide a voltage of 24V, and / or for a device under test that cannot provide power.

[0035] When used with a device under test capable of providing a voltage higher than 24V, the following setup should be performed:

[0036] 1) Close the first power-off switch 06-S3, or close the first power-off switch 06-S3 and the alarm switch 06-S4;

[0037] 2) Connect the + and - input terminals of the power conversion module to the power supply terminal of the testing equipment; connect the input line connected to the first input terminal + and the input line connected to the first input terminal - to the battery bus voltage line of the testing equipment; connect terminal B to the input terminal of the central processing unit of the device under test;

[0038] After setup, close the first power supply switch and detection switch to power on the battery voltage detection module and acquire the voltage on the bus voltage line of the battery of the device under test as the sampling voltage. Compare the sampling voltage with a preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, the coil of the relay 05-K01 is energized, the contacts are closed, and a power-off command is generated at terminal B of the power-off command line and input to the central processing unit of the device under test. When the alarm switch 06-S4 is closed, the alarm will sound when the sampling voltage is less than the preset voltage threshold.

[0039] When used with a device under test that can provide 24V voltage, the following setup should be performed:

[0040] 1) Close the first power-off switch 06-S3, or close the first power-off switch 06-S3 and the alarm switch 06-S4;

[0041] 2) Connect the 24V power input terminal + and the 24V power input terminal - to the power supply terminal of the testing equipment respectively; connect the input line connected to the first input terminal + and the input line connected to the first input terminal - to the battery bus voltage line of the testing equipment respectively; connect terminal B to the input terminal of the central processing unit of the device under test;

[0042] After setup, close the second power supply switch and detection switch to power on the battery voltage detection module and acquire the voltage on the bus voltage line of the battery of the device under test as the sampling voltage. Compare this voltage with a preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, the output terminal of the battery voltage detection module will have an output. When this output is present, the coil of the relay 05-K01 will be energized, the contacts will be closed, and a power-off command will be generated at terminal B of the power-off command line and input to the central processing unit of the device under test. When the alarm switch 06-S4 is closed, the alarm will sound when the sampling voltage is less than the preset voltage threshold.

[0043] When used for a device under test that cannot be powered, the following setup should be performed:

[0044] 1) Close the alarm switch 06-S4, or close the first power-off switch 06-S3 and the alarm switch 06-S4;

[0045] 2) The input line connected to the first input terminal + and the input line connected to the first input terminal - are respectively connected to the battery bus voltage line of the testing equipment; or, the input line connected to the first input terminal + and the input line connected to the first input terminal - are respectively connected to the battery bus voltage line of the testing equipment, and the B terminal is connected to the input terminal of the central processing unit of the device under test;

[0046] After the setup is complete, close the third power supply switch and the detection switch to power on the battery voltage detection module and obtain the voltage on the bus voltage line of the battery of the device under test as the sampling voltage. Compare it with the preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, the alarm will sound. When the first power-off switch 06-S3 is closed and the B terminal is connected to the input terminal of the central processing unit of the device under test, when the sampling voltage is less than the preset voltage threshold, the coil of the relay 05-K01 is energized, the contacts are closed, and a power-off command is generated on the B terminal of the power-off command line and input to the central processing unit of the device under test.

[0047] The third objective of this invention is to provide a method for disconnecting the battery of an urban rail vehicle, comprising the following steps:

[0048] Step 1: Determine if the target device's battery is low on power. If it is low on power, generate a power-off command; otherwise, repeat Step 1.

[0049] Step 2: The power-off command generated in Step 1 is input to the central processing unit of the target device. After receiving the power-off command, the central processing unit generates a control command to control the battery of the device under test to disconnect from the power supply.

[0050] The step described in this application involves the anti-discharge device determining whether the target device's battery is undercharged, and generating a power-off command when it is undercharged.

[0051] The beneficial effects achieved by adopting the technical solution of the present invention include at least the following:

[0052] 1) It effectively detects the battery voltage and generates a power-off command, thus preventing the battery from running out of power.

[0053] 2) The device is equipped with multiple power supply methods, which can be used to detect devices that can provide external power and devices that cannot be connected to external power, thus increasing the versatility of the device.

[0054] 3) The device is powered by a storage battery, which further enhances its portability.

[0055] 4) When this device is used in urban rail vehicles, it is connected to the central processing unit of the urban rail vehicle. The generated power-off command is input to the central processing unit, which in turn realizes the automatic power-off when the urban rail vehicle's battery is low on power. Attached Figure Description

[0056] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0057] Figure 1 Circuit diagram of the anti-power loss device provided by the present invention;

[0058] In the attached diagram, the numbers on each connecting line are the connecting line numbers. Detailed Implementation

[0059] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make the invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0060] This invention addresses the problem of equipment malfunction due to battery depletion by proposing a battery depletion prevention device. This device can be used to detect the battery voltage of any equipment with a battery and generate a power-off command and alarm. If used on urban rail vehicles, the term "urban rail vehicles" here refers to, but is not limited to, subway and light rail vehicles.

[0061] Storage batteries enable urban rail vehicles to operate without external power supply and provide stable voltage to DC load equipment. When a train malfunctions and cannot be powered externally, the batteries can power emergency lighting, train communication systems, headlights and taillights at both ends of the train, emergency ventilation, and train door operation.

[0062] After vehicle assembly, the vehicle enters the debugging workshop for debugging. The debugging process includes: drawing verification and alignment, system function debugging, static testing, and dynamic testing. During system function debugging, most tests are not permitted in high-voltage environments, only in low-voltage environments. The vehicle's low-voltage power is provided by the battery system, and the presence of battery power is a prerequisite for vehicle system debugging. During debugging, the battery power is continuously consumed. When the battery power is too low, the vehicle is directly powered off, violating the safe power usage principles of each system and potentially causing equipment damage. Furthermore, a low battery level can lead to vehicle malfunction. Based on these circumstances, there is an urgent need to address the impact of sudden battery power loss to prevent the vehicle from becoming unusable due to a depleted battery. The company lacks dedicated battery charging equipment; after a battery depletion, the entire battery pack must be removed and sent back to the battery supplier for charging before being sent back for installation. This process delays production and increases the consumption of manpower, materials, and financial resources. Therefore, research is needed on preventing battery depletion.

[0063] Workshop operators no longer need to assign dedicated personnel to monitor battery power and prevent battery depletion due to low battery levels. There is an urgent need for an intelligent device to monitor vehicle battery power and intelligently control the vehicle to disconnect power when the battery level is too low, thus keeping the battery power within a safe range.

[0064] Since there is no relevant equipment in China, this device combines the power supply principle of the low-voltage bus of the vehicle battery to monitor the bus voltage, which is equivalent to detecting the battery voltage, and generates a power-off command.

[0065] After the circuit structure design of this device is successful, PLC circuit technology is used to make the program circuit board, design the appearance and internal layout of the equipment, and prepare tools and materials according to the drawings to carry out production.

[0066] Reference Figure 1 The power loss prevention device disclosed herein includes a power supply module, a battery voltage detection module, and an alarm module.

[0067] The power supply module includes a power conversion module for converting voltages higher than 24V to 24V DC voltage, a second set of power input terminals for 24V power supply access, and a battery for directly providing operating voltage.

[0068] In this disclosure, the power conversion module includes an input terminal +, an input terminal -, an output terminal +, and an output terminal -. A first power supply switch is connected in series on the input line connected to the input terminal +. The input terminals + and - serve as the first set of power input terminals for power input with voltages higher than 24V. The output terminals + and - output 24V DC voltage is used to provide the operating voltage. The second set of power input terminals includes a 24V power input terminal + and a 24V power input terminal - for 24V power input.

[0069] Here, the first power supply switch is configured to include a normally open switch 06-S9, or to include a normally closed switch 05-S1 and a normally open switch 06-S9. One end of the normally closed switch 05-S1 is connected to the input terminal + of the power conversion module, and the other end is connected to one end of the normally open switch 06-S9. The other end of the normally open switch 06-S9 is connected to the input line. To prevent the signals generated by the device from affecting the power supply, the input line connected to the normally open switch 06-S9 is divided into two paths, each with an isolation diode 05-V1 and an isolation diode 05-V2 connected in series.

[0070] The second set of power input terminals includes a 24V power input terminal + and a 24V power input terminal -. Similarly, to prevent the signals generated by the device from affecting the power supply connected through the second set of power input terminals, the input line connected to the 24V power input terminal + is divided into two paths, each with an isolation diode 05-V5 and an isolation diode 05-V6 connected in series.

[0071] This device is equipped with a power conversion module, a second power input terminal, and a lithium battery. It can be powered by a battery or by an external DC 110V or DC 24V power supply. When using the device's built-in 24V battery, the battery powers the device. When the device is connected to an external DC 110V or other power source higher than 24V, the power conversion module outputs 24V power; when the device is connected to an external 24V DC power source, it is powered directly.

[0072] To charge the battery, the device disclosed herein further includes a charging switch, a charger, a charging indicator switch 05-S7, and a charging indicator light 05-H2. One end of the charging switch and the negative terminal of the battery are connected to the charger, and the other end of the charging switch is connected to the anode of the battery. One end of the charging indicator switch 05-S7 is connected to the end of the charging switch connected to the charger, and the other end is connected to the negative terminal of the battery via the charging indicator light 05-H2. When charging the battery is required, the charger is connected to an external charging power source, and after closing the charging indicator switch 05-S7, the charging switch is closed to begin charging, and the charging indicator light will be displayed.

[0073] To provide a clear indication of the battery's charge level, this device includes a voltage detection switch 06-S6 and a voltmeter. The voltage detection switch 06-S6 and the voltmeter are connected in series and then in parallel across the battery terminals. When the voltage detection switch 06-S6 is closed, the voltmeter displays the voltage across the positive and negative terminals of the battery, indicating the battery's charge level. When the charge level is low, charging begins, and the charging status is directly monitored via the voltmeter.

[0074] Here, the charging switch includes a normally open switch 06-S7, or a normally closed switch 05-S1 and a normally open switch 06-S7, and the battery is charged by manually closing and opening the normally open switch 06-S7.

[0075] In this disclosure, the battery voltage detection module includes a processor, a power-off command line, and a power-off control switch. The processor stores computer software programs and runs these programs upon power-on. The software compares the input voltage with a preset voltage threshold, and outputs an output when the input voltage is less than or equal to the preset threshold voltage. The processor can be any device capable of storing and running computer software programs upon power-on.

[0076] The processor includes a first input terminal +, a first input terminal -, a power supply terminal +, a power supply terminal -, and an output terminal. A detection switch is connected in series on the input line connected to the first input terminal +. The input lines connected to the first input terminals + and - are used to connect to the battery bus voltage line of the device under test. To prevent internal information from affecting the device under test, an isolation diode 05-V7 is connected in series on the input line connected to the first input terminal +.

[0077] The detection switch includes a normally open switch 06-S5, or a normally closed switch 05-S1 and a normally open switch 06-S5. The battery bus voltage of the device under test is input to the processor by manually closing and opening the normally open switch 06-S5.

[0078] The output terminals + and - of the power conversion module are connected to the power terminals + and - of the processor; the 24V power input terminal + is connected to the processor's power input terminal + via a second power supply switch, and the 24V power input terminal - is connected to the processor's power input terminal -; the positive terminal of the battery is connected to the processor's power input terminal + via a third power supply switch, and the negative terminal is directly connected to the processor's power input terminal -.

[0079] In this disclosure, the battery voltage detection module may further include a comparator, a power-off command line, and a power-off control switch. The comparator includes a first input terminal +, a first input terminal -, a power supply terminal +, a power supply terminal -, and an output terminal. A detection switch is connected in series on the input line connected to the first input terminal +. The input lines connected to the first input terminals + and - are used to connect to the battery bus voltage line of the device under test. To prevent internal information from affecting the device under test, an isolation diode 05-V7 is connected in series on the input line connected to the first input terminal +.

[0080] The input at the first input terminal (-) serves as a preset voltage threshold. When the voltage at the first input terminal (+) is less than the preset voltage threshold, an output is generated at the output terminal. The detection switch in this structure is as described above and will not be repeated here.

[0081] The output terminals + and - of the power conversion module are connected to the power supply terminals + and - of the comparator; the 24V power input terminal + is connected to the power supply terminal + of the comparator via a second power supply switch, and the 24V power input terminal - is connected to the power supply terminal - of the comparator; the positive terminal of the battery is connected to the power supply terminal + of the comparator via a third power supply switch, and the negative terminal is directly connected to the power supply terminal - of the comparator.

[0082] In this disclosure, the second power supply switch includes a normally open switch 06-S1, or includes a normally closed switch 05-S1 and a normally open switch 06-S1, and power is supplied by manually closing and opening the normally open switch 06-S1. The third power supply switch includes a normally open switch 06-S8, or includes a normally closed switch 05-S1 and a normally open switch 06-S8, and power is supplied by manually closing and opening the normally open switch 06-S8.

[0083] The disconnect command line includes terminals A and B. Terminal A is used for power-off signal input, and terminal B serves as the device output for connection to the input of the central processing unit of the device under test. A first power-off switch 06-S3 is connected in series between terminals A and B. If the power-off signal source connected to terminal A is the signal output from the processor / comparator, then terminal A is connected to the output terminal of the processor / comparator; or if the power-off signal source connected to terminal A is the power supply, then terminal A is connected to the + power supply terminal of the processor / comparator.

[0084] To prevent mutual interference between signals, when terminal A is connected to the processor's output terminal, an isolation diode 05-V8 is connected in series between terminal A and terminal B; when terminal A is connected to the processor / comparator power supply terminal +, isolation diodes 05-V4 and 05-V8 are connected in series between terminal A and the processor / comparator power supply terminal +, and between terminal A and terminal B, respectively.

[0085] The power-off control switch includes a relay 05-K01, whose coil is connected in series between the power supply terminal and the output terminal of the processor / comparator, and whose contacts are connected in series between terminal A and terminal B.

[0086] In this disclosure, the alarm module includes a buzzer as an alarm, and the buzzer is connected to the output terminal of the processor via alarm switch 06-S4.

[0087] In this disclosure, the normally closed switch is an emergency switch, which is opened when the device needs to be de-energized in an emergency, otherwise it is normally closed.

[0088] When the battery is powered, in order to facilitate power supply indication, this device also includes a battery power supply indicator switch 06-S10 and a battery power supply indicator light 05-H1. One end of the battery power supply indicator switch 06-S10 is connected to the positive terminal of the battery via a direct or normally open switch 06-S8 or normally closed switch 05-S1, and the other end is connected to the negative terminal of the battery via the battery power supply indicator light 05-H1.

[0089] When the battery is powered, closing the battery power supply indicator switch 06-S10 will illuminate the battery power supply indicator light 05-H1 to indicate power supply. To distinguish between the charging and power supply states of the battery, in this disclosure, the battery power supply indicator light 05-H1 and the charging indicator light 05-H2 are different colored, such as the charging indicator light 05-H2 being green and the battery power supply indicator light 05-H1 being red.

[0090] In addition, the battery power supply indicator switch 06-S10 and the battery power supply indicator light 05-H1 in this device also constitute a battery discharge circuit. When the battery power supply indicator switch 06-S10 is closed, the battery power supply indicator light 05-H1 lights up to consume power and achieve the purpose of discharge.

[0091] The device also includes a display unit connected to the processor for displaying the battery voltage of the device under test input to the processor.

[0092] This device is used for devices under test that can provide voltages higher than 24V, devices under test that can provide 24V, and / or devices under test that cannot provide power.

[0093] When this device is used with a device under test that can provide a voltage higher than 24V, the following setup should be performed:

[0094] 1) Close the first power-off switch 06-S3, or close the first power-off switch 06-S3 and the alarm switch 06-S4;

[0095] 2) Connect the + and - input terminals of the power conversion module to the power supply terminal of the testing equipment; connect the input lines connected to the first input terminal + and the first input terminal - to the battery bus voltage line of the testing equipment; connect terminal B to the input terminal of the central processing unit of the device under test.

[0096] After setup, close the first power supply switch to connect the power supply to the device under test. The power conversion module converts the power and outputs a 24V DC voltage to power up the battery voltage detection module. At the same time, the detection switch closes, allowing the battery voltage detection module to acquire the voltage on the battery bus voltage line of the device under test as a sampling voltage. This voltage is then compared with a preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, an output is generated at the output terminal.

[0097] When the battery voltage detection module outputs, the coil of relay 05-K01 is energized, the contacts are closed, and a power-off command is generated at terminal B of the power-off command line. The power-off command is input to the central processing unit of the device under test. After receiving the power-off command, the central processing unit generates a control command to control the battery of the device under test to disconnect from the power supply. When the alarm switch 06-S4 is closed, the alarm will sound when the sampled voltage is less than the preset voltage threshold, thus achieving the purpose of prompting.

[0098] When this device is used with a device under test that can provide 24V voltage, the following setup should be performed:

[0099] 1) Close the first power-off switch 06-S3, or close the first power-off switch 06-S3 and the alarm switch 06-S4;

[0100] 2) Connect the 24V power input terminal + and the 24V power input terminal - to the power supply terminal of the testing equipment respectively; connect the input line connected to the first input terminal + and the input line connected to the first input terminal - to the battery bus voltage line of the testing equipment respectively; connect terminal B to the input terminal of the central processing unit of the device under test.

[0101] After the setup is complete, close the second power supply switch to connect the 24V power supply to the device under test, so as to power on the battery voltage detection module; at the same time, close the detection switch to allow the battery voltage detection module to obtain the voltage on the battery bus voltage line of the device under test as the sampling voltage, and compare it with the preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, there is an output at the output terminal.

[0102] When the battery voltage detection module outputs, the coil of relay 05-K01 is energized, the contacts are closed, and a power-off command is generated at terminal B of the power-off command line. The power-off command is input to the central processing unit of the device under test. After receiving the power-off command, the central processing unit generates a control command to control the battery of the device under test to disconnect from the power supply. When the alarm switch 06-S4 is closed, the alarm will sound when the sampled voltage is less than the preset voltage threshold, thus achieving the purpose of prompting.

[0103] When this device is used for a device under test that cannot be powered, the following setup should be performed:

[0104] 1) Close the alarm switch 06-S4, or close the first power-off switch 06-S3 and the alarm switch 06-S4;

[0105] 2) The input line connected to the first input terminal + and the input line connected to the first input terminal - are respectively connected to the battery bus voltage line of the device under test; or, when connected to the battery bus voltage line of the device under test, terminal B is connected to the input terminal of the central processing unit of the device under test.

[0106] After setup, close the third power supply switch to connect the 24V battery output, powering on the battery voltage detection module. Simultaneously, close the detection switch to allow the battery voltage detection module to acquire the voltage on the bus voltage line of the battery in the device under test. This voltage is then compared to a preset voltage threshold. If the sampled voltage is lower than the preset threshold, an alarm is triggered for alert. When the first power-off switch 06-S3 is closed and its B terminal is connected to the input terminal of the central processing unit (CPU) of the device under test, if the sampled voltage is lower than the preset threshold and the battery voltage detection module outputs an output, the coil of relay 05-K01 is energized, the contacts close, and a power-off command is generated on the B terminal of the power-off command line. This power-off command is then input to the CPU of the device under test. Upon receiving the power-off command, the CPU generates a control command to de-energize the battery in the device under test.

[0107] The functions of this device are summarized below in conjunction with the following operating conditions:

[0108] Operating Condition 1: This device is used to detect the voltage of the 24V battery in trams and automatically cut off power to ensure safe voltage.

[0109] This device connects to the 24V battery bus voltage line of the tram, and the vehicle bus directly supplies 24V power to the device. The device processor realizes online monitoring of the tram battery voltage and displays the current voltage value of the 24V battery bus voltage on the display unit, which is the voltage value of the 24V battery of the tram.

[0110] The battery voltage detection module sets a safe voltage value as a preset voltage threshold. When the battery voltage is less than or equal to this safe voltage value, the device sends a power-off command to the tram, and the vehicle automatically cuts off the power to prevent power loss.

[0111] Operating Condition 2: This device is used to detect the voltage of the 110V battery in subway vehicles and automatically cut off power to ensure safe voltage.

[0112] This device connects to the 110V battery bus voltage line of the subway car. The 110V power from the car bus is converted to 24V via a power conversion module to provide voltage for the battery voltage detection module. This device enables online monitoring of the subway car battery voltage and displays the current voltage value of the 110V battery bus voltage, which is the voltage value of the subway car's 110V battery, on the display unit.

[0113] The battery voltage detection module sets a safe voltage value as a preset voltage threshold. When the battery voltage is less than or equal to this safe voltage value, the device sends a power-off command to the tram, and the vehicle automatically cuts off the power to prevent power loss.

[0114] Operating Condition 3: This device is used to detect the power supply voltage of general electrical equipment and to provide a buzzer warning.

[0115] This device connects to the power bus voltage line of a general electrical equipment. At this time, the device's battery supplies power to the device itself. The battery voltage detection module realizes online monitoring of the voltage of the general electrical equipment and displays the current voltage value of the 110V battery bus voltage of the subway vehicle on the display unit, which is the voltage value of the 110V battery of the subway vehicle.

[0116] The battery voltage detection module sets a safe voltage value as a preset voltage threshold. When the battery voltage is less than or equal to this safe voltage value, the buzzer will sound an alarm to protect the power of general electrical equipment.

[0117] This device includes a housing, within which various functional modules are distributed. The modules are connected via wires or signal lines. The device employs a modular design, facilitating easy replacement of damaged parts. Normally open switches, normally closed switches, indicator lights, display units, and interfaces are located on the housing and clearly labeled to indicate their functions for ease of operation. Interfaces are provided for power supply and power bus voltage connection.

[0118] Functional description of this device: ① Power supply module; ② Automatic power-off upon detecting vehicle battery voltage; ③ Buzzer alarm upon detecting general electrical equipment. (Generally applicable to subway and tram projects); This device is connected to the equipment under test only via the battery bus voltage line.

[0119] This device monitors the train's battery voltage online and automatically cuts off power to the vehicle, preventing battery depletion. It can detect 110V and 24V battery voltages, increasing its versatility and applicability to voltage detection in general electrical equipment. The battery-powered design further enhances portability, allowing use even in scenarios where an external power source is unavailable. Furthermore, its AC220V power supply interface is highly universal, facilitating use and charging. Utilizing this device for battery voltage depletion detection significantly reduces manpower, material, and time costs, while improving production and verification efficiency.

[0120] This disclosure has been described with reference to the foregoing embodiments; however, these embodiments are merely examples for implementing this disclosure. It must be noted that the disclosed embodiments do not limit the scope of this disclosure. On the contrary, any changes and modifications made without departing from the spirit and scope of this disclosure are within the scope of patent protection of this disclosure.

Claims

1. A device for preventing power loss, characterized in that, The device includes A battery voltage detection module includes a first input terminal +, a first input terminal -, a power supply terminal +, a power supply terminal -, and an output terminal. A detection switch is connected in series on the input line connected to the first input terminal +. The input lines connected to the first input terminal + and the first input terminal - are used to connect to the bus voltage line of the battery of the device under test. The power-off command line includes a terminal A and a terminal B. Terminal A is used for power-off signal source input, and terminal B is used as the output of the device to connect to the input terminal of the central processing unit of the device under test. A first power-off switch 06-S3 is connected in series between terminal A and terminal B. The power-off control switch includes a relay 05-K01, the coil of which is connected in series between the power supply terminal and the output terminal of the battery voltage detection module, and the contacts are connected in series between terminal A and terminal B. The alarm is connected to the output terminal of the battery voltage detection module via alarm switch 06-S4; The power conversion module includes an input terminal +, an input terminal -, an output terminal +, and an output terminal -. A first power supply switch is connected in series on the input line connected to the input terminal +. The input terminals + and - serve as the first set of power input terminals for power supplies with voltages higher than 24V, converting voltages higher than 24V into 24V DC voltage. The output terminals + and - are respectively connected to the power terminals + and - of the battery voltage detection module, providing operating voltage to the battery voltage detection module. The second set of power input terminals is used for 24V power input, including a 24V power input terminal + and a 24V power input terminal -. The 24V power input terminal + is connected to the power input terminal + of the battery voltage detection module via the second power supply switch, and the 24V power input terminal - is connected to the power input terminal - of the battery voltage detection module. The positive terminal of the battery is connected to the power supply terminal + of the battery voltage detection module via a third power supply switch, and the negative terminal is directly connected to the power supply terminal - of the battery voltage detection module, so as to directly provide the working voltage to the battery voltage detection module. When the device is used for a device under test that can provide a voltage higher than 24V, the following setup should be performed: 1) Close the first power-off switch 06-S3, or close the first power-off switch 06-S3 and the alarm switch 06-S4; 2) Connect the + and - input terminals of the power conversion module to the power supply terminal of the testing equipment; connect the input line connected to the first input terminal + and the input line connected to the first input terminal - to the battery bus voltage line of the testing equipment; connect terminal B to the input terminal of the central processing unit of the device under test; After setup, close the first power supply switch and detection switch to power on the battery voltage detection module and acquire the voltage on the bus voltage line of the battery of the device under test as the sampling voltage. Compare the sampling voltage with a preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, the coil of the relay 05-K01 is energized, the contacts are closed, and a power-off command is generated at terminal B of the power-off command line and input to the central processing unit of the device under test. When the alarm switch 06-S4 is closed, the alarm will sound when the sampling voltage is less than the preset voltage threshold. When the device is used for a device under test that can provide 24V voltage, the following setup should be performed: 1) Close the first power-off switch 06-S3, or close the first power-off switch 06-S3 and the alarm switch 06-S4; 2) Connect the 24V power input terminal + and the 24V power input terminal - to the power supply terminal of the testing equipment respectively; connect the input line connected to the first input terminal + and the input line connected to the first input terminal - to the battery bus voltage line of the testing equipment respectively; connect terminal B to the input terminal of the central processing unit of the device under test; After setup, close the second power supply switch and detection switch to power on the battery voltage detection module and acquire the voltage on the bus voltage line of the battery of the device under test as the sampling voltage. Compare this voltage with a preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, the output terminal of the battery voltage detection module will have an output. When this output is present, the coil of the relay 05-K01 will be energized, the contacts will be closed, and a power-off command will be generated at terminal B of the power-off command line and input to the central processing unit of the device under test. When the alarm switch 06-S4 is closed, the alarm will sound when the sampling voltage is less than the preset voltage threshold. When the device is used for a device under test that cannot be powered, the following setup should be performed: 1) Close the alarm switch 06-S4, or close the first power-off switch 06-S3 and the alarm switch 06-S4; 2) The input line connected to the first input terminal + and the input line connected to the first input terminal - are respectively connected to the battery bus voltage line of the testing equipment; or, the input line connected to the first input terminal + and the input line connected to the first input terminal - are respectively connected to the battery bus voltage line of the testing equipment, and the B terminal is connected to the input terminal of the central processing unit of the device under test; After the setup is complete, close the third power supply switch and the detection switch to power on the battery voltage detection module and obtain the voltage on the bus voltage line of the battery of the device under test as the sampling voltage. Compare it with the preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, the alarm will sound. When the first power-off switch 06-S3 is closed and the B terminal is connected to the input terminal of the central processing unit of the device under test, when the sampling voltage is less than the preset voltage threshold, the coil of the relay 05-K01 is energized, the contacts are closed, and a power-off command is generated on the B terminal of the power-off command line and input to the central processing unit of the device under test.

2. The anti-power loss device according to claim 1, characterized in that, It also includes an isolation diode, which is configured to be connected in one or all of the following locations: 1) On the input line connected to the input terminal, the cathode is connected to the first power supply switch; 2) On the input line connected to the first input terminal, the cathode is connected to the detection switch; 3) Connected in the forward direction between terminal A and relay 05-K01; 4) The cathode of the input line connected to the 24V power supply terminal is connected to the second power supply switch.

3. The anti-power loss device according to claim 1, characterized in that, It also includes a charging management circuit, which includes a charging switch and a charger. One end of the charging switch and the negative terminal of the battery are respectively connected to the charger, and the other end of the charging switch is connected to the anode of the battery.

4. The anti-power loss device according to claim 3, characterized in that, It also includes a charging indicator switch 05-S7 and a charging indicator light 05-H2. One end of the charging indicator switch 05-S7 is connected to the end of the charging switch that is connected to the charger, and the other end is connected to the negative terminal of the battery via the charging indicator light 05-H2.

5. The anti-power loss device according to any one of claims 1-4, characterized in that, It also includes a voltage detection switch 06-S6 and a voltmeter, wherein the voltage detection switch 06-S6 and the voltmeter are connected in series and then in parallel across the two ends of the battery.

6. The anti-power loss device according to claim 1, characterized in that, It also includes a battery power supply indicator switch 06-S10 and a battery power supply indicator light 05-H1. One end of the battery power supply indicator switch 06-S10 is connected to the positive terminal of the battery, and the other end is connected to the negative terminal of the battery via the battery power supply indicator light 05-H1.

7. The anti-power loss device according to claim 1, characterized in that, The first power supply switch, the third power supply switch, and / or the detection switch include normally closed switches and normally open switches, wherein the normally closed switch is an emergency power-off switch.

8. The anti-power loss device according to claim 3, characterized in that, The charging switch includes a normally closed switch and a normally open switch, and the normally closed switch is an emergency power-off switch.

9. The method of using the anti-power loss device according to any one of claims 1-8, characterized in that, The anti-power loss device according to any one of claims 1-8 is used for a device under test that can provide a voltage higher than 24V, a device under test that can provide a voltage of 24V, and / or for a device under test that cannot provide power. When used with a device under test capable of providing a voltage higher than 24V, the following setup should be performed: 1) Close the first power-off switch 06-S3, or close the first power-off switch 06-S3 and the alarm switch 06-S4; 2) Connect the + and - input terminals of the power conversion module to the power supply terminal of the testing equipment; connect the input line connected to the first input terminal + and the input line connected to the first input terminal - to the battery bus voltage line of the testing equipment; connect terminal B to the input terminal of the central processing unit of the device under test; After setup, close the first power supply switch and detection switch to power on the battery voltage detection module and acquire the voltage on the bus voltage line of the battery of the device under test as the sampling voltage. Compare the sampling voltage with a preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, the coil of the relay 05-K01 is energized, the contacts are closed, and a power-off command is generated at terminal B of the power-off command line and input to the central processing unit of the device under test. When the alarm switch 06-S4 is closed, the alarm will sound when the sampling voltage is less than the preset voltage threshold. When used with a device under test that can provide 24V voltage, the following setup should be performed: 1) Close the first power-off switch 06-S3, or close the first power-off switch 06-S3 and the alarm switch 06-S4; 2) Connect the 24V power input terminal + and the 24V power input terminal - to the power supply terminal of the testing equipment respectively; connect the input line connected to the first input terminal + and the input line connected to the first input terminal - to the battery bus voltage line of the testing equipment respectively; connect terminal B to the input terminal of the central processing unit of the device under test; After setup, close the second power supply switch and detection switch to power on the battery voltage detection module and acquire the voltage on the bus voltage line of the battery of the device under test as the sampling voltage. Compare this voltage with a preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, the output terminal of the battery voltage detection module will have an output. When this output is present, the coil of the relay 05-K01 will be energized, the contacts will be closed, and a power-off command will be generated at terminal B of the power-off command line and input to the central processing unit of the device under test. When the alarm switch 06-S4 is closed, the alarm will sound when the sampling voltage is less than the preset voltage threshold. When used for a device under test that cannot be powered, the following setup should be performed: 1) Close the alarm switch 06-S4, or close the first power-off switch 06-S3 and the alarm switch 06-S4; 2) The input line connected to the first input terminal + and the input line connected to the first input terminal - are respectively connected to the battery bus voltage line of the testing equipment; or, the input line connected to the first input terminal + and the input line connected to the first input terminal - are respectively connected to the battery bus voltage line of the testing equipment, and the B terminal is connected to the input terminal of the central processing unit of the device under test; After the setup is complete, close the third power supply switch and the detection switch to power on the battery voltage detection module and obtain the voltage on the bus voltage line of the battery of the device under test as the sampling voltage. Compare it with the preset voltage threshold. When the sampling voltage is less than the preset voltage threshold, the alarm will sound. When the first power-off switch 06-S3 is closed and the B terminal is connected to the input terminal of the central processing unit of the device under test, when the sampling voltage is less than the preset voltage threshold, the coil of the relay 05-K01 is energized, the contacts are closed, and a power-off command is generated on the B terminal of the power-off command line and input to the central processing unit of the device under test.

10. A method for disconnecting the power supply to a battery in an urban rail vehicle, characterized in that, The method includes the following steps: Step 1: Determine if the target device's battery is low on power. If it is low on power, generate a power-off command; otherwise, repeat Step 1. Step 2: The power-off command generated in Step 1 is input to the central processing unit of the target device. After receiving the power-off command, the central processing unit generates a control command to control the battery of the device under test to disconnect from the power supply. Step one uses the anti-discharge device according to any one of claims 1-7 to determine whether the target device's battery is in a state of discharge, and if it is, generates a power-off command.

11. The method for disconnecting the battery of an urban rail vehicle according to claim 10, characterized in that, The target equipment includes urban rail vehicles capable of providing voltages higher than 24V, urban rail vehicles capable of providing 24V, and / or urban rail vehicles that cannot provide power.

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