CMS balance test system and method

Abstract

The invention discloses a CMS balance test system and method, and the system comprises a resistor voltage dividing unit which is used for providing a working voltage for a CMS in a voltage dividing manner; the optocoupler detection units are connected to the resistor voltage dividing unit side in parallel and used for detecting the state of each voltage dividing resistor in the resistor voltage dividing unit, and when the voltage at the two ends of each voltage dividing resistor is abnormal, the corresponding optocoupler detection unit is disconnected; the control unit is connected in series with the output end of the optocoupler detection unit and is used for receiving an output signal of the optocoupler detection unit; the display unit is connected with the control unit and used for receiving the signal transmitted by the control unit and displaying the state; according to the system, a simple and easy-to-implement circuit structure is adopted, whether a balance part of the CMS works abnormally or not is detected and recognized through an interrupt signal of a control unit, the control unit performs state display or reminding through a display unit or a buzzer, and the control unit can correspondingly and rapidly position a corresponding abnormal CMS channel through an INT number; operation is simple, and the achieving effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of CMS testing, and in particular to a CMS balance testing system and method. Background Art

[0002] A CMS is a supercapacitor management system consisting of multiple capacitors connected in series. It ensures that each capacitor is in a balanced state during operation and does not exceed its upper voltage limit. CMS is primarily used for supercapacitor management, providing monitoring, management, and protection for capacitor banks. It ensures the safety and lifespan of supercapacitors during operation by real-time monitoring of capacitor module voltage, temperature, and cell overvoltage, and provides real-time alarms, including on-site dry contact alarm outputs and remote alarms. 12 Furthermore, the CMS capacitor management system features short sampling times, powerful active balancing capabilities, and high insulation performance. It utilizes a modular design, supports RS485 / CAN communication, and features alarm information collection, transmission, and recording. The balancing component primarily monitors and manages supercapacitor parameters such as voltage and temperature, ensuring safe and efficient operation. Failure of the CMS's balancing component can render it inoperable. However, existing balancing tests for CMS rely on observing process current, which is highly limited and inconvenient. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention aims to provide a balance test system and method for CMS.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] CMS's balance test system includes:

[0006] The resistor voltage divider unit is used to divide the voltage to provide the working voltage for the CMS;

[0007] An optocoupler detection unit is connected to the resistor voltage divider unit and is used to detect the status of each voltage divider resistor in the resistor voltage divider unit. When the voltage across the voltage divider resistor is abnormal, the corresponding optocoupler detection unit is disconnected.

[0008] a control unit, connected in series with the output end of the optical coupler detection unit, and configured to receive an output signal of the optical coupler detection unit;

[0009] The display unit is connected to the control unit and receives the signal transmitted by the control unit to display the status.

[0010] In the present invention, preferably, the resistor voltage divider unit includes a voltage divider resistor R0, a voltage divider resistor R1, a voltage divider resistor R2, a voltage divider resistor R3, a voltage divider resistor R4, a voltage divider resistor R5 and a voltage divider resistor R6 connected in series in sequence, and the two ends of the series circuit are respectively connected to the power supply end and the ground end, and the two ends of each voltage divider resistor are connected to pins 1-8 of the socket H1 in sequence, and the two ends of the capacitor of the CMS are connected through the socket H1, and each voltage divider resistor corresponds to a capacitor of the CMS.

[0011] In the present invention, preferably, the optocoupler detection unit includes photocouplers U0-U6, the input end of each photocoupler is connected in parallel to the two ends of the corresponding voltage divider resistor, and the output end is connected to the control unit, and one end of the optocoupler detection unit connected to the control unit is also connected in series with resistors R16-R22 respectively.

[0012] In the present invention, preferably, the control unit includes a controller U7, pins 1 to 7 of the controller U7 are respectively connected to the photoelectric couplers of the optocoupler detection unit, and pins 27 to 38 of the controller U7 are connected to the display unit.

[0013] In the present invention, preferably, pin 25 of the controller U7 is also connected to a buzzer U10.

[0014] In the present invention, preferably, capacitors C6 and C7 are respectively connected in parallel between pins 37 and 38 of the controller U7 and the display unit connection circuit.

[0015] In the present invention, preferably, a power supply unit is further included, the power supply unit includes a voltage regulator U8, the voltage input end is connected to pin 1 of the voltage regulator U8, and pin 3 outputs the VCC power supply voltage, and the voltage input end, pin 1 of the voltage regulator U8, pin 3 of the voltage regulator U8 and the VCC power supply voltage end are respectively connected in series with capacitor C8, capacitor C10, capacitor C11 and capacitor C9.

[0016] CMS's balancing test method includes the following steps:

[0017] The resistor voltage divider unit divides the voltage to provide the CMS with the working voltage;

[0018] The optocoupler detection unit detects the status of each voltage-dividing resistor in the resistor voltage-dividing unit. When the voltage across the voltage-dividing resistor is abnormal, the optocoupler detects a short circuit and disconnects.

[0019] The detection unit receives the output signal of the optical coupler detection unit and transmits the detection signal to the control unit;

[0020] The control unit makes a judgment based on the detection signal and displays the status through the display unit.

[0021] In the present invention, preferably, a timer, a judgment module, a recording module and an interrupt trigger module are set inside the control unit. When the signal input to the control unit is interrupted, the interrupt trigger module records the number corresponding to the interrupt signal and triggers the timer to count. The recording module records the numbers INT1 to INT7 corresponding to the received signals within the counting period. The judgment module is used to determine whether the numbers recorded by the recording module within the counting period are complete. When some numbers are missing, it is determined that the CMS of the channel corresponding to the missing number is working abnormally.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The system of the present invention adopts a simple and easy-to-implement circuit structure, realizes the collection of CMS status signals through the connection and cooperation of a resistor voltage divider unit and an optocoupler detection unit, identifies whether the balancing part of the CMS is working abnormally through the interrupt signal detection of the control unit, and displays or reminds the status through a display unit or a buzzer. The control unit can also quickly locate the corresponding abnormal CMS channel through the INT number. The operation is simple and the implementation effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of the balance test system providing CMS according to the present invention.

[0025] Figure 2 This is a circuit diagram of the resistor voltage divider unit and the optocoupler detection unit described in the present invention.

[0026] Figure 3 This is a circuit diagram of the control unit and display unit according to the present invention.

[0027] Figure 4 This is a circuit diagram of the power supply unit according to the present invention. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please also see Figures 1 to 4 A preferred embodiment of the present invention provides a balance test system for CMS, which has a simple overall circuit structure, is easy to implement, and has low cost. The terminal voltage of each capacitor of the CMS is collected through a channel, and the collected signal is input into a control unit and displayed through a display unit. The output test results are directly displayed through the display unit, which is convenient for viewing and improves the overall success rate and accuracy of the detection.

[0031] This system specifically includes:

[0032] The resistor voltage divider unit is used to divide the voltage to provide the working voltage for the CMS;

[0033] An optocoupler detection unit is connected to the resistor voltage divider unit and is used to detect the status of each voltage divider resistor in the resistor voltage divider unit. When the voltage across the voltage divider resistor is abnormal, the corresponding optocoupler detection unit is disconnected.

[0034] a control unit, connected in series with the output end of the optical coupler detection unit, and configured to receive an output signal of the optical coupler detection unit;

[0035] The display unit is connected to the control unit and receives the signal transmitted by the control unit to display the status.

[0036] See Figure 2 Specifically, the resistor voltage divider unit includes a voltage divider resistor R0, a voltage divider resistor R1, a voltage divider resistor R2, a voltage divider resistor R3, a voltage divider resistor R4, a voltage divider resistor R5 and a voltage divider resistor R6 connected in series in sequence. The two ends of the series circuit are respectively connected to the power supply end and the ground end. The two ends of each voltage divider resistor are connected to pins 1-8 of the socket H1 in sequence, and the two ends of the capacitor of the CMS are connected through the socket H1. Each voltage divider resistor corresponds to a capacitor of the CMS, and the voltage across the voltage divider resistor and the capacitor connected to it through the socket H1 is the same, thereby voltage division ensures the normal operation of the CMS.

[0037] Specifically, the optocoupler detection unit includes photocouplers U0-U6, and the input end of each photocoupler is connected in parallel to the corresponding two ends of the voltage divider resistor, that is, the two ends of each voltage divider resistor are connected to the input end of an optocoupler, and a protection resistor is also connected in series at the input end of the photocoupler, the output end of the photocoupler is connected to the control unit, and the end of the optocoupler detection unit connected to the control unit is also connected in series with resistors R16-R22 respectively.

[0038] See Figure 3 Specifically, the control unit includes a controller U7, pins 1 to 7 of the controller U7 are respectively connected to the photoelectric couplers of the optocoupler detection unit, and pins 27 to 38 of the controller U7 are connected to the display unit.

[0039] Specifically, the pin 25 of the controller U7 is also connected to a buzzer U10. When an interruption occurs, that is, when the CMS works abnormally, the buzzer U10 makes a sound to remind.

[0040] Specifically, capacitors C6 and C7 are respectively connected in parallel between pins 37 and 38 of the controller U7 and the display unit connection circuit. Pins 37 and 38 of the controller U7 are used to provide working voltage to the display unit, and capacitors C6 and C7 are used for filtering and voltage stabilization.

[0041] See Figure 4 Specifically, it also includes a power supply unit, which includes a voltage regulator U8, a voltage input end connected to pin 1 of the voltage regulator U8, and pin 3 outputs a VCC power supply voltage. The voltage input end, pin 1 of the voltage regulator U8, pin 3 of the voltage regulator U8 and the VCC power supply voltage end are respectively connected in series with capacitors C8, C10, C11 and C9.

[0042] Specifically, pins 1-7 of controller U7 are connected to each optocoupler U0-U6, receiving analog status signals from these devices. Pins 1-7 of each controller U7 correspond to numbers INT1-INT7, with each number corresponding to a specific optocoupler. Specifically, INT1 corresponds to optocoupler U6, INT2 corresponds to optocoupler U5, INT3 corresponds to optocoupler U4, INT4 corresponds to optocoupler U3, INT5 corresponds to optocoupler U2, INT6 corresponds to optocoupler U1, and INT7 corresponds to optocoupler U0. Setting these numbers facilitates quick location of each branch. When the CMS system is operating normally, the voltages across each voltage divider resistor are the same. At this point, the corresponding optocouplers are operating normally and all output signals to pins 1-7 of controller U7. Controller U7 receives the signals internally and stores them according to the corresponding pin numbers. Controller U7 receives all signals numbered INT1-INT7 and controls the display unit to display the normal status. When part of the CMS system is abnormal, the voltage across the voltage divider resistor is abnormal, the corresponding optocoupler is disconnected, the corresponding controller U7 pin receiving signal is disconnected, and the corresponding pin number inside the controller U7 is missing. It is judged as abnormal and displayed through the display unit. The buzzer can also be controlled to sound a reminder.

[0043] Another preferred embodiment of the present invention provides a CMS balance test method, comprising the steps of:

[0044] The resistor voltage divider unit divides the voltage to provide the CMS with the working voltage;

[0045] The optocoupler detection unit detects the status of each voltage-dividing resistor in the resistor voltage-dividing unit. When the voltage across the voltage-dividing resistor is abnormal, the optocoupler detects a short circuit and disconnects.

[0046] The detection unit receives the output signal of the optical coupler detection unit and transmits the detection signal to the control unit;

[0047] The control unit makes a judgment based on the detection signal and displays the status through the display unit.

[0048] Specifically, the resistor voltage divider unit includes voltage divider resistors R0-R6, which are connected to various capacitors inside the CMS through the plug H1, and voltage sampling is performed at the same time. At the same time, the two ends of the voltage divider resistors R0-R6 are connected to various photoelectric couplers U0-U6 of the optocoupler detection unit, and the status signal is transmitted to the control unit through the opening and closing of the photoelectric coupler U0-U6. A timer, a judgment module, a recording module and an interrupt trigger module are set inside the control unit. When the signal input to the control unit is interrupted, the interrupt trigger module records the number corresponding to the interrupt signal and triggers the timer to count. The recording module records the number INT1~INT7 corresponding to the received signal within the counting period. The judgment module is used to determine whether the number recorded by the recording module within the counting period is complete. When some numbers are missing, it is determined that the CMS of the channel corresponding to the missing number is working abnormally.

[0049] In some other preferred embodiments of the present invention, a computer-readable storage medium is provided, storing a computer program. When the computer program is executed by a processor, the processor executes the steps of the method described in the above embodiment.

[0050] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0051] The above description is a detailed description of the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. Any equivalent changes or modifications completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. The CMS balance test system is characterized by: include: A resistor voltage divider unit is used to divide the voltage to provide the CMS with a working voltage; An optical coupler detection unit is connected to the resistor voltage divider unit side and is used to detect the state of each voltage divider resistor in the resistor voltage divider unit. When the voltage across the voltage divider resistor is abnormal, the corresponding optical coupler detection unit is disconnected; A control unit, connected in series with the output end of the optical coupling detection unit, and used for receiving the output signal of the optical coupling detection unit; The display unit is connected to the control unit and receives the signal transmitted by the control unit to display the status.

2. The CMS balance test system according to claim 1, characterized in that: The resistor voltage divider unit includes a voltage divider resistor R0, a voltage divider resistor R1, a voltage divider resistor R2, a voltage divider resistor R3, a voltage divider resistor R4, a voltage divider resistor R5 and a voltage divider resistor R6 connected in series in sequence, and the two ends of the series circuit are respectively connected to the power supply end and the ground end, and the two ends of each voltage divider resistor are connected to pins 1-8 of the socket H1 in sequence, and the two ends of the capacitor of the CMS are connected through the socket H1, and each voltage divider resistor corresponds to a capacitor of the CMS.

3. The CMS balance test system according to claim 2, characterized in that: The optical coupler detection unit includes photocouplers U0-U6, the input end of each photocoupler is connected in parallel to the two ends of the corresponding voltage divider resistor, and the output end is connected to the control unit. The end of the optical coupler detection unit connected to the control unit is also connected in series with resistors R16-R22 respectively.

4. The CMS balance test system according to claim 1, characterized in that: The control unit includes a controller U7, pins 1 to 7 of the controller U7 are respectively connected to the photoelectric couplers of the optocoupler detection unit, and pins 27 to 38 of the controller U7 are connected to the display unit.

5. The CMS balance test system according to claim 4, characterized in that: Pin No. 25 of the controller U7 is also connected to a buzzer U10.

6. The CMS balance test system according to claim 4, characterized in that: Capacitors C6 and C7 are respectively connected in parallel between pins 37 and 38 of the controller U7 and the display unit connection circuit.

7. The CMS balance test system according to claim 1, characterized in that: It also includes a power supply unit, which includes a voltage regulator U8, a voltage input end connected to pin 1 of the voltage regulator U8, and pin 3 outputs a VCC power supply voltage. The voltage input end, pin 1 of the voltage regulator U8, pin 3 of the voltage regulator U8 and the VCC power supply voltage end are respectively connected in series with capacitors C8, C10, C11 and C9.

8. A CMS balancing test method, based on a CMS balancing test system according to any one of claims 1 to 7, characterized in that: Includes steps: The resistor voltage divider unit divides the voltage to provide the CMS with a working voltage; The optical coupler detection unit detects the state of each voltage-dividing resistor in the resistor voltage-dividing unit. When the voltage across the voltage-dividing resistor is abnormal, the optical coupler detects a short circuit and disconnects. The detection unit receives the output signal of the optical coupling detection unit and transmits the detection signal to the control unit; The control unit makes a judgment according to the detection signal and displays the status through the display unit.

9. The CMS balance test method according to claim 8, characterized in that: A timer, a judgment module, a recording module and an interrupt trigger module are set inside the control unit. When the signal input to the control unit is interrupted, the interrupt trigger module records the number corresponding to the interrupt signal and triggers the timer to count. During the counting period, the recording module records the numbers INT1~INT7 corresponding to the received signals. The judgment module is used to determine whether the numbers recorded by the recording module within the counting period are complete. When some numbers are missing, it is determined that the CMS of the channel corresponding to the missing numbers is working abnormally.

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