Detection device and detection method for power distribution unit

Abstract

The invention discloses a detection device and a detection method for a power distribution unit, and relates to the technical field of power testing, the detection device comprises a main body assembly and a battery assembly, the battery assembly is detachably connected with the main body assembly, and the main body assembly is provided with a core controller, a switching power supply module, a parameter detection module, a communication module and a man-machine operation module. The input end of the switching power supply module is connected with the output end of the to-be-tested power supply distribution unit; wherein the parameter detection module comprises a first sampling channel and a second sampling channel, the first sampling channel is connected with the output end of the power distribution unit to be detected, the second sampling channel is connected with the output end of the switching power supply module, and the output end of the parameter detection module is connected with the battery assembly. According to the invention, the detachable battery is used as a load source to realize field detection, power supply interruption and heat energy waste are avoided, and the device has the advantages of high-efficiency detection under the condition of not interrupting power supply, energy waste reduction and detection precision improvement.

Description

Technical Field

[0001] This application relates to the field of power supply testing technology, and in particular to a testing device and testing method for a power distribution unit. Background Technology

[0002] A Power Distribution Unit (PDU) is a product designed to distribute power to rack-mounted electrical equipment. It comes in various series and specifications with different functions, installation methods, and socket combinations, providing suitable rack-mount power distribution solutions for different power environments. The application of PDUs makes power distribution in racks neater, more reliable, safer, more professional, and more aesthetically pleasing, while also making power maintenance in racks more convenient and reliable. With the continuous expansion of critical infrastructure such as data centers and 5G base stations, power distribution units are playing an increasingly important role in end-point power distribution and high-precision energy metering. Rack-mounted power distribution units require testing before leaving the factory or during use.

[0003] However, rack-mounted power distribution units are typically permanently fixed inside racks or server cabinets. Testing requires power interruption, removal of all cables, and transport of the entire unit to an external laboratory. This process not only results in lengthy testing cycles for individual devices but also deprives the rack of redundant power supply capabilities during the testing window, significantly increasing the probability of unexpected data center downtime.

[0004] Traditional alternatives rely on servers running within racks as the load source. However, server workloads fluctuate drastically with real-time business demands, resulting in continuously unstable output current. The collected data exhibits a discrete distribution and cannot maintain a constant current state, while lacking a closed-loop feedback mechanism. This makes it difficult to accurately reproduce multiple target detection points across the entire measurement range, especially failing to effectively identify nonlinear measurement deviations or systematic parameter shifts. Furthermore, testing methods using handheld power quality analyzers or field calibrators often employ resistance boxes or electronic load designs, resulting in bulky equipment, difficult on-site operation, and the direct conversion of electrical energy into heat during testing. This waste heat is released into the cold aisle environment of the server room, forcing the air conditioning system to operate additionally to offset the heat load, leading to unnecessary energy waste and increased operating costs. Summary of the Invention

[0005] The purpose of this application is to provide a detection device and method for a power distribution unit, which has the advantages of efficient detection without interrupting power supply, reducing energy waste, and improving detection accuracy.

[0006] To achieve the above objectives, this application provides the following solution: In a first aspect, this application provides a testing device for a power distribution unit. The testing device includes a main assembly and a battery assembly, the battery assembly being detachably connected to the main assembly. The main assembly has a core controller, a switching power supply module, a parameter detection module, a communication module, and a human-machine interface module. The input terminal of the switching power supply module is connected to the output terminal of the power distribution unit under test. The parameter detection module includes a first sampling channel and a second sampling channel. The first sampling channel is connected to the output terminal of the power distribution unit under test, the second sampling channel is connected to the output terminal of the switching power supply module, and the output terminal of the parameter detection module is connected to the battery assembly. The core controller is connected to both the parameter detection module and the human-machine interface module, and is communicatively connected to the power distribution unit under test via the communication module.

[0007] Optionally, the detection device of the power distribution unit further includes: a constant current control module and a battery balancing and protection module; The constant current control module is connected to the core controller, and the output terminal of the parameter detection module is connected to the input terminal of the constant current control module. The output terminal of the constant current control module is connected to the battery assembly. The battery balancing and protection module is connected to the battery assembly.

[0008] Optionally, the main component includes a housing, a first circuit board, and a second circuit board. The surface of the housing is provided with a handle, and the first circuit board and the second circuit board are connected by a first connector. The core controller, the switching power supply module, the parameter detection module, the communication module, and the human-machine operation module are all integrated within the housing.

[0009] Optionally, the first circuit board and the second circuit board are electrically connected; The circuit board is provided with the switching power supply module and the parameter detection module; The second circuit board is equipped with the core controller, the communication module, and the human-machine operation module.

[0010] Optionally, the human-machine operation module specifically includes: The display screen is used for setting parameters, displaying status, and providing operation instructions for the power distribution unit under test. A button is used to turn the display screen on or off.

[0011] Optionally, the circuit board is provided with interface one and interface two. The switching power supply module is connected to the output terminal of the power distribution unit under test through interface one, and interface two is connected to the circuit board one.

[0012] Optionally, the battery assembly includes: support; The battery is mounted on the bracket and located inside the housing; The second connector is used for detachably connecting the bracket and the housing.

[0013] Secondly, this application provides a method for detecting a power distribution unit, implemented using the power distribution unit detection device described in any of the first aspects above, specifically including: Connect the output terminal of the power distribution unit under test to the interface of the detection device, and the communication module is connected to the power distribution unit under test for communication. Power on the power distribution unit under test and turn on the switching power supply module. Turn on the display screen by pressing the button. Set the target detection parameters through the human-machine operation module. The target detection parameters include at least multiple target detection points. The detection device is activated in response to the detection command of the core controller, and the current parameter value of the battery input terminal is matched with each of the target detection points in sequence to complete the detection of the power distribution unit under test. Generate and output a test report for the power distribution unit under test; Determine whether the remaining capacity of the battery is less than the capacity threshold. If so, replace the battery and perform energy recovery on the battery. The detection of the power distribution unit under test includes: The constant current control module is activated by the core controller to adjust the current parameter value at the input terminal of the battery to match the target detection point. At the same time, the parameter detection module collects the output current value at the output terminal of the power distribution unit under test and the input current value at the input terminal of the battery, and transmits the output current value and the input current value to the core controller. The core controller continuously collects the current parameter values ​​of the power distribution unit under test corresponding to the target detection point through the communication module, and calculates the error between the output current value, the input current value and the current parameter value; Determine whether the remaining capacity of the battery is less than the capacity threshold. If so, replace the battery to complete the test of the power distribution unit under test.

[0014] Optionally, if the rated power of the power distribution unit under test is greater than the power threshold, then multiple detection devices are connected in parallel, including: Connect the second interface of the previous detection device to the first interface of the next detection device, and connect the unconnected first interface to the output terminal of the power distribution unit under test. The communication modules of each of the aforementioned detection devices are connected to the power distribution unit under test via a communication bus.

[0015] Optionally, if multiple ports of the power distribution unit under test are to be tested simultaneously, multiple testing devices are cascaded, including: Connect the interface of each of the aforementioned detection devices to the corresponding output ports of the power distribution unit under test. The communication modules of each of the aforementioned detection devices are connected to the power distribution unit under test via a communication bus.

[0016] According to the specific embodiments provided in this application, the following technical effects are disclosed: This application provides a testing device and method for a power distribution unit. By designing the main component and battery assembly as detachably connected and integrating a core controller, switching power supply module, parameter detection module, communication module, and human-machine interface module, it achieves on-site, rapid, and accurate testing of the power distribution unit. This device avoids the cumbersome process of powering off the entire unit, disconnecting wires, and transporting it in traditional testing methods, significantly reducing testing time and downtime risk. Through dual-channel parameter sampling and data processing by the core controller, stable, closed-loop testing data can be obtained, effectively detecting nonlinear measurement errors. Simultaneously, by utilizing the battery assembly as a load, electrical energy is recovered and reused, reducing heat dissipation and lowering the cooling burden and secondary energy consumption of the computer room. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the functional modules of a detection device for a power distribution unit provided in an embodiment of this application; Figure 2 A schematic diagram of the functional modules of a detection device for a power distribution unit provided in another embodiment of this application; Figure 3 A schematic diagram of the overall structure of the detection device for the power distribution unit provided in the embodiments of this application; Figure 4 A schematic diagram of the main component structure of the detection device for the power distribution unit provided in the embodiments of this application; Figure 5 A schematic diagram of the battery assembly of the detection device for the power distribution unit provided in the embodiments of this application; Figure 6A system connection diagram showing multiple detection devices connected in parallel to detect a high-power power distribution unit, as provided in the embodiments of this application; Figure 7 A system connection diagram for cascading multiple detection devices to detect a multi-port power distribution unit, as provided in the embodiments of this application; Figure 8 A schematic diagram of the concentrated discharge of the battery pack in the detection device of the power distribution unit provided in the embodiments of this application; Figure 9 This is a schematic flowchart of the detection method for the power distribution unit provided in an embodiment of this application.

[0019] Figure label: 001. Main Component; 002. Battery Component; 111. Core Controller; 103. Switching Power Supply Module; 112. Parameter Detection Module; 108. Communication Module; 115. Human-Machine Operation Module; 113. Constant Current Control Module; 114. Battery Balancing and Protection Module; 101. Housing; 102. Circuit Board 1; 107. Circuit Board 2; 106. First Connector; 104. Interface 1; 105. Interface 2; 201. Bracket; 203. Battery Pack; 003. Second Connector; 202. Third Connector. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] Traditional testing methods for rack-mounted power distribution units (PDUs) have several shortcomings. For example, testing a PDU typically requires powering off the entire unit, disconnecting the cables, and transporting it to the laboratory. This is not only time-consuming, but the PDU's offline status during testing can lead to the rack losing redundant power supply and posing a risk of system downtime. Furthermore, existing methods struggle to accurately reproduce the full range of multi-segment testing points, and the conversion of electrical energy into heat dissipation increases the cooling burden on the data center.

[0022] In response, this application proposes a testing device for a power distribution unit, comprising: a main component 001 and a battery component 002, wherein the battery component 002 is detachably connected to the main component 001; the main component 001 includes a core controller 111, a switching power supply module 103, a parameter detection module 112, a communication module 108, and a human-machine interface module 115; the input terminal of the switching power supply module 103 is connected to the output terminal of the power distribution unit under test (not shown in the figure); wherein, the parameter detection module 112 includes a first sampling channel and a second sampling channel, the first sampling channel is connected to the output terminal of the power distribution unit under test, the second sampling channel is connected to the output terminal of the switching power supply module 103, and the output terminal of the parameter detection module 112 is connected to the battery component 002; the core controller 111 is connected to the parameter detection module 112 and the human-machine interface module 115 respectively, and is communicatively connected to the power distribution unit under test through the communication module 108.

[0023] For ease of understanding, the following explains some key terms in this embodiment: The main component 001 is the core part of the power distribution unit's detection device. It integrates multiple functional modules and is responsible for realizing the main functions of the detection device.

[0024] Battery assembly 002 can act as a load to absorb the output power of the power distribution unit under test.

[0025] The core controller 111 is the control center of the detection device, responsible for coordinating the work of various modules, processing detection data, and executing detection tasks according to preset programs.

[0026] The switching power supply module 103 is used to convert and manage the electrical energy output by the power distribution unit under test to meet the charging needs of the battery pack or the power supply needs of other modules inside the device.

[0027] The parameter detection module 112 is used to collect the output parameters of the power distribution unit under test and the current parameters inside the device in real time, providing data support for the core controller 111.

[0028] The communication module 108 is used to realize data exchange and command transmission between the detection device of the power distribution unit and the power distribution unit under test, so as to ensure the coordination of the detection process.

[0029] The human-machine interface module 115 is the interface through which the user interacts with the detection device, and is used for parameter setting, status display and operation command input.

[0030] The power distribution unit under test refers to a power distribution unit whose performance parameters need to be tested, such as a rack-mounted PDU in a data center or 5G base station.

[0031] The first sampling channel is used to directly acquire parameters such as the output current or voltage of the power distribution unit under test.

[0032] The second sampling channel is used to collect parameters such as current or voltage from the output terminal of the switching power supply module connected to the battery pack.

[0033] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Please see Figure 1 This application provides a testing device for a power distribution unit, comprising a main component 001 and a battery component 002, wherein the battery component 002 is detachably connected to the main component 001. The main component 001 integrates the core electronic modules required for testing, while the battery component 002 serves as a movable energy storage and load unit. The main component 001 and the battery component 002 are designed to be detachably connected, for example, by means of mechanical clips, bolt fixing, or sliding rail connection, to facilitate the replacement, maintenance, or independent charging of the battery component. The main component 001 includes a core controller 111, a switching power supply module 103, a parameter detection module 112, a communication module 108, and a human-machine interface module 115. The input terminal of the switching power supply module 103 is connected to the output terminal of the power distribution unit under test. The parameter detection module 112 includes a first sampling channel and a second sampling channel. The first sampling channel is connected to the output terminal of the power distribution unit under test and directly samples the AC parameters (voltage, current, power, and energy) at the output terminal of the power distribution unit under test. The second sampling channel is connected to the output terminal of the switching power supply module 103 and synchronously samples the DC parameters (charging voltage and charging current) at the battery input terminal. The output terminal of the parameter detection module 112 is connected to the battery assembly 002. The core controller 111 is connected to both the parameter detection module 112 and the human-machine interface module 115, and communicates with the power distribution unit under test through the communication module 108.

[0035] The power distribution unit detection device provided in this embodiment, by designing the main component 001 and battery component 002 as detachably connected, and integrating a core controller 111, a switching power supply module 103, a parameter detection module 112, a communication module 108, and a human-machine operation module 115, achieves on-site, rapid, and accurate detection of the power distribution unit. The core controller 111 uses a high-performance ARM processor to coordinate the work of various functional modules and execute detection logic, including parameter setting, data acquisition, integrated control, error calculation, and report generation. Through the first and second sampling channels of the parameter detection module 112, dual-channel parameter sampling and data processing by the core controller 111 can obtain stable, closed-loop detection data, effectively detecting nonlinear measurement errors. Simultaneously, by using the battery component as a load, electrical energy is recovered and reused, reducing heat dissipation and lowering the cooling burden and secondary energy consumption of the computer room. It should be noted that during testing, the switching power supply module 103 converts the AC power output from the power distribution unit into DC power, and the constant current control module 113 regulates the current to charge the battery pack 203. Electrical energy is stored in the battery pack 203 in the form of chemical energy (without heat waste). This device avoids the cumbersome process of powering off the entire machine, disconnecting wires, and transporting the device in traditional testing methods, significantly reducing testing time and the risk of downtime. After the human-machine interface module 115 indicates that the battery is fully charged, remove the fully charged battery pack 103 and replace it with the battery pack 203 to be charged; connect the fully charged battery pack 203 to the centralized discharge device (as shown in the attached diagram). Figure 8 As shown, the discharge device can invert the electrical energy of the battery pack 203 into 220V / 50Hz AC power, or directly discharge it into DC power; the discharged electrical energy can be used for computer room lighting, maintenance tools, small equipment, etc., forming an energy recovery closed loop of "detection-storage-release-utilization", which reduces the overall energy consumption.

[0036] like Figure 2 As shown, in an exemplary embodiment, the detection device of the power distribution unit may further include: a constant current control module 113 and a battery balancing and protection module 114; the constant current control module 113 is connected to the core controller 111, and the output terminal of the parameter detection module 112 is connected to the input terminal of the constant current control module 113, and the output terminal of the constant current control module 113 is connected to the battery assembly 002; the battery balancing and protection module 114 is connected to the battery assembly 002.

[0037] For example, the constant current control module 113 may include current sampling, error amplification, and a PWM control unit to ensure the stability and accuracy of the charging current. To achieve full-range segmented detection, the constant current control module 113 adopts an adaptive PID algorithm based on the core controller 111. This algorithm can monitor power fluctuations and changes in battery internal resistance in real time, dynamically adjust the PWM control signal, and quickly output the PWM control signal after receiving the current setting command, so that the charging current is stabilized within ±1% of the set value within 500ms.

[0038] Specifically, the constant current control module 113 is used to precisely maintain a constant current during the charging and discharging process of the battery assembly 002. This module can adjust the current flowing into or out of the battery assembly 002 according to instructions issued by the core controller 111, keeping it at a preset constant value. This can be achieved by using a current sensor to monitor the input or output current of the battery assembly 002 in real time and feeding the detected current value back to the control circuit. The control circuit compares the actual current value with the target current value and generates a corresponding control signal to drive a power regulation element to adjust the impedance or conduction state in the current path, thereby achieving precise current control. This precise current control is crucial for the health management and stable load or power supply during the testing process of the battery assembly 002.

[0039] Meanwhile, the battery balancing and protection module 114 is designed to ensure the safe operation of the battery assembly 002 and extend its service life. This module typically integrates multiple functions, including individual cell voltage monitoring, overcharge protection, over-discharge protection, overcurrent protection, short-circuit protection, and temperature protection. Regarding battery balancing, when the battery assembly 002 consists of multiple cells connected in series or parallel, this module can monitor the voltage of each individual cell and, through active or passive balancing techniques, maintain consistent voltage across all cells, preventing performance degradation due to overcharging or over-discharging of some cells. Regarding battery protection, when the voltage, current, or temperature of the battery assembly 002 is detected to exceed safe limits, the module immediately cuts off the charging and discharging circuit to prevent battery damage or safety accidents. For example, when the voltage of the battery assembly 002 is too high, the protection module will stop charging; when the voltage is too low, it will stop discharging.

[0040] Please see Figure 3 and Figure 4 In an exemplary embodiment, the main component 001 may include a housing 101, a first circuit board 102 and a second circuit board 107. The surface of the housing 101 is provided with a handle (not shown in the figure). The first circuit board 102 and the second circuit board 107 are connected by a first connector 106. The core controller 111, the switching power supply module 103, the parameter detection module 112, the communication module 108 and the human-machine operation module 115 are all integrated in the housing 101.

[0041] Specifically, the power distribution unit detection device provided in this embodiment has an overall size of only 10cm × 10cm × 16cm and weighs 2kg, making it compact and easy to carry. The housing 101, as the external structure of the detection device, is mainly used to house and protect the internal electronic components and modules, preventing damage from external impacts, dust, moisture, or other environmental factors. The housing is typically made of robust and durable materials, such as engineering plastics or lightweight metal alloys, to ensure the overall strength and service life of the device. A handle is provided on the surface of the housing 101, designed to facilitate the user's transport and movement of the detection device between different testing locations, improving the device's portability and ease of operation.

[0042] Circuit board 102 and circuit board 2 107 are substrates used to carry and connect electronic components, and they are fixed by a first connector 106. Exemplarily, the first connector provided in this embodiment is a hexagonal stud to achieve mechanical fixation between circuit board 102 and circuit board 2 107. This dual-circuit board design facilitates the rational layout and functional partitioning of internal modules. For example, power management and high-power modules can be placed on one circuit board, while control and communication modules can be placed on another, thereby optimizing circuit design, reducing mutual interference, and facilitating subsequent modular upgrades or maintenance.

[0043] Optionally, circuit board 102 and circuit board 2 107 are electrically connected; circuit board 102 is provided with a switching power supply module 103 and a parameter detection module 112; circuit board 2 107 is provided with a core controller 111, a communication module 108 and a human-machine operation module 115.

[0044] Specifically, circuit board 102 and circuit board 2 107 are electrically connected to establish an electrical path between the two circuit boards for power supply, signal transmission, or data exchange. This connection can be achieved in various ways, such as using pin header / female header connectors, flexible flat cables (FFC / FPC), board-to-board connectors, or backplane connectors. It should be noted that this application does not specifically limit the method of electrical connection.

[0045] Optionally, the human-machine operation module 115 specifically includes: a display screen 110 for setting parameters, displaying status and providing operation guidance for the power distribution unit under test; and buttons 109 for turning the display screen 110 on or off.

[0046] Specifically, the display screen 110, serving as the visual output interface for human-machine interaction, can be implemented using various display technologies, such as a liquid crystal display (LCD), an organic light-emitting diode display (OLED), or a touchscreen. The display screen 110 carries several key functions: First, regarding parameter setting, operators can intuitively select or input detection parameters for the power distribution unit under test through the display screen 110, such as the target detection point, detection duration, and data recording interval. This can be achieved through on-screen menus, virtual keyboards, or selection lists. Second, regarding status display, the display screen 110 can present the real-time operating status of the detection device and the power distribution unit under test, including but not limited to current values, voltage values, power, remaining battery charge of battery module 002, detection progress, and any possible errors or warnings. This information can be displayed in the form of numbers, graphics (such as waveforms, bar charts), or status indicator lights, allowing operators to quickly grasp the equipment status. Third, regarding operation guidance, the display screen 110 can provide clear guidance or prompts to guide users through various operations, such as menu navigation, result interpretation, or troubleshooting steps, thereby reducing operational difficulty.

[0047] The button 109 serves as a physical input component for human-computer interaction, and its main function is to control the opening and closing of the display screen 110. The button 109 can be a physical push-button, a membrane key, or a capacitive key. By pressing the button 109, the operator can conveniently and quickly switch the operating state of the display screen 110, such as turning it off to save power when not in use, or quickly turning it on when information needs to be viewed.

[0048] Optionally, the circuit board 102 is provided with interface 104 and interface 105. The switching power supply module 103 is connected to the output terminal of the power distribution unit under test through interface 104, and interface 105 is connected to the circuit board 102. For example, interface 104 can be a C14 interface and interface 105 can be a C13 interface.

[0049] like Figure 6 As shown, in an exemplary embodiment, in order to meet the detection requirements of a high-power power distribution unit, if the rated power of the power distribution unit under test is greater than the power threshold (for example, when the rated power of the power distribution unit under test is greater than 500W), multiple detection devices are connected in parallel.

[0050] Specifically, the interface 105 of the previous detection device is connected to the interface 104 of the next detection device, and the unconnected interface 104 is connected to the output terminal of the power distribution unit under test. The communication modules 108 of each detection device are connected to the power distribution unit under test via a communication bus. The detection device connected to the output terminal of the power distribution unit under test acts as the host, coordinating the distribution of load current (avoiding communication conflicts) and achieving linear superposition of current and power ranges to meet the requirements of high-power detection.

[0051] like Figure 7 As shown, in an exemplary embodiment, if multiple ports of the power distribution unit under test are to be detected simultaneously, multiple detection devices are cascaded. Specifically, the interfaces 104 of each testing device are connected to the corresponding output ports of the power distribution unit under test; the communication modules 108 of each testing device are connected to the power distribution unit under test via a communication bus. For example, the interfaces 104 (C14 interfaces) of n testing devices are connected to the n output ports of the power distribution unit under test, and the communication modules 108 of the n testing devices are cascaded and connected to the power distribution unit under test via a communication bus (network cable).

[0052] like Figure 5 As shown, in an exemplary embodiment, the battery assembly 002 may include: a bracket 201, a battery pack 203, and a second connector 003; wherein the battery pack 203 is mounted on the bracket 201 and located inside the housing 101; the second connector 003 is used to detachably connect the bracket 201 and the housing 101.

[0053] Specifically, the bracket 201 is a structural component used to support and fix the battery pack 203. It can be made of various materials and in various forms, such as frames, trays, or boxes made of plastic, metal, or composite materials. Its main function is to provide a stable mounting base for the battery pack 203, ensuring the correct position and orientation of the battery pack 203 inside the detection device, and preventing displacement of the battery pack 203 when the device moves or vibrates. The second connector 003 is a key component for achieving a detachable connection between the bracket 201 and the housing 101. For example, the screw connection used in this embodiment can provide high connection strength and stability, while improving the user's operational convenience when replacing the battery assembly 002. The screws provided in this embodiment are merely exemplary connection methods; the second connector 003 can also be a snap-fit, slide rail, magnetic structure, or quick-release mechanism, etc. The battery pack 203 is a programmable load; the electrical energy consumed during the detection process can be stored in the battery pack 203, meeting the requirements for efficient energy recovery and utilization, and completely avoiding the drawbacks of traditional resistive loads that convert electrical energy into heat energy and waste. The battery pack 203 uses high-capacity polymer lithium batteries and can be assembled into a lithium battery pack by connecting individual battery cells in parallel or series according to testing requirements, thereby expanding the load capacity and forming a portable detection source. The battery pack 203 can be connected via a third connector 202, which can be a screw.

[0054] Based on the same inventive concept, embodiments of this application also provide a method for detecting a power distribution unit, implemented using the power distribution unit detection device provided in any of the above embodiments, such as... Figure 9 As shown, the detection method for this power distribution unit may specifically include: S110, connects the power distribution unit under test to the detection device.

[0055] In some embodiments, the above step S110 (connecting the power distribution unit under test and the detection device) may include: connecting the output terminal of the power distribution unit under test to the interface 104 of the detection device, and the communication module 108 communicating with the power distribution unit under test.

[0056] S120. Start the detection device and set the target detection parameters.

[0057] In some embodiments, the above step S120 (starting the detection device and setting the target detection parameters) may include: powering on the power distribution unit under test and turning on the switching power supply module 103, turning on the display screen 110 via button 109, and setting the target detection parameters via the human-machine operation module 115, wherein the target detection parameters include at least a plurality of target detection points.

[0058] S130, Test the power distribution unit under test.

[0059] In some embodiments, the above step S120 (detecting the power distribution unit under test) may be implemented by: starting the detection device in response to the detection command of the core controller 111, matching the current parameter value of the input terminal of the battery pack 203 with each target detection point in sequence, and completing the detection of the power distribution unit under test. S140. Generate and output the test report for the power distribution unit under test.

[0060] S150. Determine whether the remaining capacity of battery pack 203 is less than the capacity threshold. If so, replace battery pack 203 and perform energy recovery on battery pack 203.

[0061] It should be noted that the embodiment of this application does not specifically limit the capacity threshold, and the staff can set it according to the actual situation; for example, when the remaining capacity of the battery pack 203 is 0 (i.e., fully charged), the fully charged battery pack 203 is replaced and the energy of the battery pack 203 is recovered.

[0062] In step S130 above, the detection of the power distribution unit under test includes: Step 1: Start the constant current control module 113 through the core controller 111, adjust the current parameter value of the input terminal of the battery pack 203 to match the target detection point, and at the same time, collect the output current value of the output terminal of the power distribution unit under test and the input current value of the input terminal of the battery pack 203 through the parameter detection module 112, and transmit the output current value and input current value to the core controller 111.

[0063] Step 2: The core controller 111 continuously collects the current parameter values ​​of the power distribution unit under test corresponding to the target detection point through the communication module 108, and calculates the error between the output current value, the input current value and the current parameter value.

[0064] Step 3: Determine whether the remaining capacity of battery pack 203 is less than the capacity threshold. If so, replace battery pack 203 to complete the test of the power distribution unit under test.

[0065] Specifically, the power distribution unit testing method provided in this application embodiment involves connecting the testing device's interface 104 (C14 interface) to the output port of the power distribution unit under test, ensuring the interface is firmly plugged in without looseness; the testing device casing is grounded (if grounding is required on site). The power supply to the corresponding testing port of the power distribution unit under test is turned on, and the switching power supply module 103 is activated to perform a self-test on the testing device (the core controller 111 coordinates the initialization of each module). The LCD display shows a "ready" state. The battery balancing and protection module 114 automatically detects the battery's internal resistance and the balance of individual cell voltages. If no abnormalities are found, the setting interface is entered. The user sets the testing parameters through the human-machine interface module 115 (LCD display). For example, the target testing parameters can be: ① constant current testing mode (fixed value testing: 0.5A / 1.0A / 2.0A; or continuously adjustable testing: any value from 0.5 to 2.0A); ② testing point sequence (e.g., "0.5A→1.0A→2.0A"); ③ single testing duration (default ≤2s, meeting the design requirements of the testing device). If the communication protocol of the power distribution unit under test is known, manually select (Modbus TCP / IP, Modbus RTU, or SNMP); if unknown, select "Automatic Adaptation," and the testing device will automatically poll the protocol through the communication module 108 to achieve seamless connection with the power distribution unit under test. After receiving the set parameters, the core controller 111 sends a command to the switching power supply module 103 to convert the AC power output from the power distribution unit under test into stable DC power; at the same time, it sends a current setting command to the constant current control module 113.

[0066] The constant current control module 113 dynamically adjusts the control signal through current sampling, error amplification, and a PWM control unit, combined with an adaptive PID algorithm, to stabilize the charging current of the battery pack 203 within ±1% of the set value within 500ms (e.g., if set to 1.0A, the current after stabilization is 0.99~1.01A). During this time, the charging process of the battery pack 203 acts as the load of the power distribution unit under test, realizing closed-loop detection. The parameter detection module 112 synchronously starts sampling: ① AC side channel: collects AC parameters such as voltage, current, power, and energy at the output port of the power distribution unit under test; ② DC side channel: collects DC parameters such as charging voltage and charging current at the input terminal of the battery pack 203, with a sampling time ≤100ms and a detection accuracy of 0.5%.

[0067] The core controller 111 sends a data request to the power distribution unit under test through the communication module 108 and reads the current port electrical parameters measured by the power distribution unit under test (such as the current and voltage values ​​displayed by the power distribution unit under test). The data transmission and reception time is ≤400ms.

[0068] The core controller 111 uses the built-in battery charging model and efficiency algorithm to accurately convert the parameters collected on the DC side into equivalent parameters on the AC side. It then performs a three-way synchronous comparison with the output parameters of the power distribution unit under test directly collected on the AC side and the metering parameters of the power distribution unit under test itself, calculates the error, and records the error data, detection timestamp, and current target detection point parameters.

[0069] The detection time for a single target detection point is ≤2s. After the core controller 111 confirms that the data acquisition is complete and the error calculation is finished, it automatically moves to the next target detection point and repeats steps one, two, and three above. If in 2.0A constant current mode, when the single detection time is <2s, the detection device can continuously complete ≥300 standard tests without replacing the battery midway.

[0070] During the testing process, the battery balancing and protection module 114 monitors the changes in capacity and internal resistance of the battery pack 203 in real time and displays the remaining capacity on the display screen 110. If the display shows "Battery fully charged or insufficient capacity", the testing device will automatically stop the current target testing point and prompt "Replace battery pack" or "Energy recovery".

[0071] Remove the fully charged battery pack 203, replace it with the battery pack 203 to be charged, and after re-fixing, the detection device automatically resumes detection (continuing from the current target detection point); the fully charged battery pack 203 can be connected to a centralized discharge device for subsequent secondary use of electrical energy (such as power supply for computer room lighting).

[0072] Once all target detection points (such as 0.5A, 1.0A, and 2.0A) have completed detection, the core controller 111 stops the constant current control module 113 from working, cuts off the charging circuit of the battery pack 203, and the detection device enters the "data aggregation" state.

[0073] The core controller 111 integrates all target detection point data, including the measured values ​​of the power distribution unit under test, device detection values, error rate, detection time, battery status records, etc. of each target detection point, and generates a standardized test report (including pass / fail judgment: error ≤0.5% is considered pass).

[0074] View directly on the LCD screen; or upload to the backend server (such as the DCIM system) via the communication module, supporting storage and printing.

[0075] Turn off the power to the corresponding test port of the power distribution unit under test, and then turn off the power switch of the test device; disconnect the device from the power distribution unit under test (for a single test device, directly plug and unplug the C14 interface; for multiple test devices, first disconnect the communication cascade between the host and the slave, and then disconnect the power parallel interface).

[0076] Store the battery pack 203 separately from the main component 001 (if it is not used for a long time), and connect the fully charged battery pack 203 to a centralized discharge device for energy recovery.

[0077] Clean the interface and casing of the testing device, check the status record of the battery equalization and protection module 114, and ensure that the performance of the testing device is stable before the next test; if it is a combination test of multiple testing devices, disassemble each testing device and restore the independent state of each testing device.

[0078] In some embodiments, if the rated power of the power distribution unit under test is greater than the power threshold, multiple detection devices can be connected in parallel, which may include: Connect the interface 105 of the previous detection device to the interface 104 of the next detection device, and connect the unconnected interface 104 to the output terminal of the power distribution unit under test; connect the communication module 108 of each detection device to the power distribution unit under test via the communication bus.

[0079] Specifically, the interface 105 of the previous detection device is connected to the interface 104 of the next detection device, and the unconnected interface 104 is connected to the output terminal of the power distribution unit under test. The communication modules 108 of each detection device are connected to the power distribution unit under test via a communication bus (network cable). The detection device connected to the output terminal of the power distribution unit under test acts as the host, coordinating the distribution of load current (avoiding communication conflicts) and achieving linear superposition of current and power ranges to meet the requirements of high-power detection.

[0080] In some embodiments, if multiple ports of the power distribution unit under test are to be tested simultaneously, cascading multiple testing devices may include: Connect the interface 104 of each detection device to the corresponding output port of the power distribution unit under test; The communication modules 108 of each testing device are connected to the power distribution unit under test via a communication bus.

[0081] Specifically, the interfaces 104 of each testing device are connected to the corresponding output ports of the power distribution unit under test; the communication modules 108 of each testing device are connected to the power distribution unit under test via a communication bus. For example, the interfaces 104 (C14 interfaces) of n testing devices are connected to the n output ports of the power distribution unit under test, and the communication modules 108 of the n testing devices are cascaded and connected to the power distribution unit under test via a communication bus (network cable).

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A detection device of a power distribution unit, characterized by, The detection device of the power distribution unit comprises a main body assembly and a battery assembly, the battery assembly is detachably connected with the main body assembly, the main body assembly is provided with a core controller, a switching power supply module, a parameter detection module, a communication module and a man-machine operation module, and an input end of the switching power supply module is connected with an output end of a to-be-detected power distribution unit; The parameter detection module comprises a first sampling channel and a second sampling channel, the first sampling channel is connected with the output end of the to-be-detected power distribution unit, the second sampling channel is connected with an output end of the switching power supply module, and an output end of the parameter detection module is connected with the battery assembly; The core controller is connected with the parameter detection module and the man-machine operation module, and is in communication connection with the to-be-detected power distribution unit through the communication module.

2. The detection apparatus of a power distribution unit according to claim 1, wherein The detection device of the power distribution unit further comprises a constant current control module and a battery equalization and protection module; The constant current control module is connected with the core controller, an output end of the parameter detection module is connected with an input end of the constant current control module, and an output end of the constant current control module is connected with the battery assembly; The battery equalization and protection module is connected with the battery assembly.

3. The detection apparatus of a power distribution unit according to claim 1, wherein, The main body assembly comprises a shell, a first circuit board and a second circuit board, a handle is arranged on a surface of the shell, and the first circuit board and the second circuit board are connected through a first connecting piece; The core controller, the switching power supply module, the parameter detection module, the communication module and the man-machine operation module are integrated in the shell.

4. The detection apparatus of a power distribution unit according to claim 3, wherein The first circuit board and the second circuit board are electrically connected; The switching power supply module and the parameter detection module are arranged on the first circuit board; The core controller, the communication module and the man-machine operation module are arranged on the second circuit board.

5. The detection apparatus of a power distribution unit of claim 1, wherein, The man-machine operation module specifically comprises: A display screen is arranged for parameter setting, state display and operation guidance of the to-be-detected power distribution unit; A key is arranged for turning on or off the display screen.

6. The detection apparatus of a power distribution unit according to claim 3, wherein An interface one and an interface two are arranged on the first circuit board, the switching power supply module is connected with the output end of the to-be-detected power distribution unit through the interface one, and the interface two is connected with the first circuit board.

7. The detection apparatus of a power distribution unit according to claim 3, wherein The battery assembly comprises: A support; A battery is mounted on the support and located in the shell; A second connecting piece is arranged for detachably connecting the support and the shell.

8. A method for detecting a power distribution unit, characterized in that, The detection device of the power distribution unit is achieved by the device according to any one of claims 1-7, and specifically comprises: The output end of the to-be-detected power distribution unit is connected with the interface one of the detection device, and the communication module is in communication connection with the to-be-detected power distribution unit; The to-be-detected power distribution unit is powered on and the switching power supply module is turned on, the display screen is turned on through the key, and the target detection parameter is set through the man-machine operation module, wherein the target detection parameter at least comprises a plurality of target detection points; The detection device is started in response to the detection instruction of the core controller, the current parameter value of the input end of the battery is matched with each target detection point in sequence, and the detection of the to-be-detected power distribution unit is completed. Generate and output the detection report of the power distribution unit under test; If the remaining capacity of the battery is less than the capacity threshold, replace the battery and recover the electric energy of the battery; The detection of the power distribution unit under test includes: The core controller starts the constant current control module to adjust the current parameter value of the input end of the battery to match the target detection point, and the parameter detection module collects the output current value of the output end of the power distribution unit under test and the input current value of the input end of the battery, respectively, and transmits the output current value and the input current value to the core controller; The core controller continuously collects the current parameter value of the power distribution unit under test corresponding to the target detection point through the communication module, and calculates the error of the output current value, the input current value and the current parameter value; If the remaining capacity of the battery is less than the capacity threshold, replace the battery to complete the detection of the power distribution unit under test.

9. The method of claim 8, wherein the step of detecting the power distribution unit further comprises the step of: If the rated power of the power distribution unit under test is greater than the power threshold, the plurality of detection devices are connected in parallel, including: ​ Connect the interface two of the previous detection device with the interface one of the next detection device, and connect the unconnected interface one with the output end of the power distribution unit under test; The communication modules of each detection device are connected with the power distribution unit under test through the communication bus.

10. The method of claim 8, wherein the power distribution unit is a power distribution unit of a telecommunications system. If the plurality of ports of the power distribution unit under test are detected at the same time, the plurality of detection devices are connected in series, including: Connect the interface one of each detection device with the corresponding output port of the power distribution unit under test, respectively; The communication modules of each detection device are connected with the power distribution unit under test through the communication bus.

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