A DC / DC power supply test system

Abstract

The utility model discloses a kind of DC / DC power supply test systems, it is related to power supply test field, for improving the test efficiency of double input, multiple output DC / DC power supply.Test system includes first DC power supply, second DC power supply, multichannel load, conversion component, detector and industrial computer;Industrial computer is connected load, first DC power supply, second DC power supply, conversion component and detector respectively;Conversion component is connected or disconnected DC / DC power supply with each road load;Conversion component is provided with first switch component between DC / DC power supply and first DC power supply and second DC power supply;Detector detects the working parameter of DC / DC power supply under enabling state.Working parameter is obtained from detector to analyze test index by industrial computer control conversion component forward or reverse intercommunication DC / DC power supply and first DC power supply or second DC power supply, complete test.Test system can improve test efficiency and accuracy after working.

Description

Technical Field

[0001] This utility model relates to the field of power supply testing, and in particular to a DC / DC power supply testing system. Background Technology

[0002] Dual-input (main power and backup power) and multi-output (two or more outputs) DC / DC power supplies are widely used in complex power supply systems with batteries as backup inputs. However, their complex performance specifications (first DC power supply voltage range, first DC power supply current, second DC power supply voltage range, first DC power supply current, no-load output voltage, full-load output voltage, voltage noise, steady-state time, inrush current, overshoot current, reverse voltage, short-circuit protection, input reverse connection protection, enable control, etc.) reduce testing efficiency.

[0003] Traditional testing methods involve manually operating testing instruments (such as oscilloscopes and multimeters) to extract operating parameters from the current-carrying lines between the DC / DC power supply and each load to calculate performance indicators. Since DC / DC power supplies have multiple output lines, this method requires manually switching test lines (including the DC power supply and current-carrying lines), making the operation cumbersome and inefficient. Utility Model Content

[0004] The purpose of this invention is to provide a DC / DC power supply testing system to address all or part of the problems mentioned above, thereby providing a tool that can improve the testing efficiency of dual-input, multi-output DC / DC power supplies.

[0005] The technical solution adopted in this utility model is as follows: A DC / DC power supply testing system, comprising: First DC power supply; second DC power supply; at least one load; conversion component; detector; industrial computer; The industrial control computer is connected to each of the loads, the first DC power supply, the second DC power supply, the conversion component, and the detector. The conversion component is connected to the DC / DC power supply, each of the loads, the first DC power supply, and the second DC power supply; The conversion component connects or disconnects the DC / DC power supply from each of the loads; the conversion component provides a first switching component between the DC / DC power supply and the first DC power supply and the second DC power supply to connect or disconnect the DC / DC power supply from the first DC power supply or the second DC power supply. The detector measures the operating parameters of the DC / DC power supply in the enabled state.

[0006] Furthermore, the test system also includes an enabling power supply connected to the conversion component; the conversion component connects or disconnects the enabling power supply and the DC / DC power supply.

[0007] Furthermore, the first switching assembly is configured to: connect the DC / DC power supply to the first DC power supply or the second DC power supply in the forward direction, or connect the DC / DC power supply to the first DC power supply or the second DC power supply in the reverse direction, or disconnect the DC / DC power supply from the first DC power supply and the second DC power supply.

[0008] Furthermore, the first switching assembly includes a first switching branch and a second switching branch; the first switching branch connects the first DC power supply to the DC / DC power supply from a positive or negative direction; the second switching branch connects the second DC power supply to the DC / DC power supply from a positive or negative direction; the first switching branch and the second switching branch operate asynchronously.

[0009] Furthermore, both the first switch branch and the second switch branch include a main branch and a secondary branch; the main branch and the secondary branch are asynchronously connected.

[0010] Furthermore, the detector includes a first detection module and a second detection module; The first detection module and the second detection module are respectively connected to the DC / DC power supply. The first detection module detects the input operating parameters of the DC / DC power supply in the enabled state, and the second detection module is used to detect the output operating parameters of the DC / DC power supply in the enabled state.

[0011] Furthermore, the output operating parameters include the load operating parameters when the DC / DC power supply is unloaded or driving the load, and the reverse-feed operating parameters when the first DC power supply or the second DC power supply drives the DC / DC power supply.

[0012] Furthermore, the first switch branch and the second switch branch are connected, and the DC / DC power supply is connected to the connection point; the detector tests the reverse power supply operating parameters when the first DC power supply drives the DC / DC power supply from the second switch branch; the detector tests the reverse power supply operating parameters when the second DC power supply drives the DC / DC power supply from the first switch branch.

[0013] Furthermore, both the first switch branch and the second switch branch include a detection harness and a current-carrying harness that operate synchronously; the detector obtains the operating parameters from the detection harness.

[0014] Furthermore, the first switch branch and the second switch branch are respectively designed with nodes for leading out the reverse irrigation operating parameters; the nodes on the first switch branch and the second switch branch are connected to the detector through the same set of ports.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: The proposed test system for dual-input, multi-output DC / DC power supplies enables automated testing of these power supplies by configuring corresponding control logic within the industrial control computer. This includes automatic power / load switching, automatic acquisition of operating parameters, automatic analysis of test indicators, and even automatic configuration of detector / load parameters. This allows for flexible expansion of the number of current-carrying lines and the configuration of load sizes, thereby efficiently completing automated testing of dual-input power supplies, multi-output loads, and reverse-connected power supplies. The test logic is clear and the degree of automation is high. Furthermore, the separation of the output detection lines and output current-carrying lines reduces measurement errors caused by line losses and improves test accuracy. Attached Figure Description

[0016] This utility model will be described by way of example and with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of a dual-input, multi-output DC / DC power supply.

[0017] Figure 2 This is a structural diagram of a traditional DC / DC power supply testing system.

[0018] Figure 3 This is a structural diagram of one embodiment of the DC / DC power supply test system of this application.

[0019] Figure 4 , Figure 5 This is a circuit diagram of the first switching component in one embodiment.

[0020] Figure 6 This is a flowchart illustrating the operation of a DC / DC power supply test system in one embodiment. Detailed Implementation

[0021] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0022] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0023] Dual-input, multi-output DC / DC power supplies such as Figure 1 As shown, its inputs include a first DC unit and a backup second DC power supply, and its outputs include multiple channels (CH) (10 channels are used as an example here). Due to the large amount of test data for dual-input, multi-output DC / DC power supplies, there are problems with cumbersome operation and a large workload in configuring parameters and switching operations. For example... Figure 2 As shown, traditional manual testing methods connect the testing instrument to the current-carrying lines of each channel one by one to extract operating parameters and calculate performance indicators. This method requires manually switching power supplies and manually configuring the testing parameters of the testing instruments (usually multiple), resulting in low testing efficiency and susceptibility to subjective operational errors that compromise the accuracy of test results. To address this issue, this application proposes a DC / DC power supply testing system designed to improve the efficiency and accuracy of testing dual-input, multi-output DC / DC power supplies.

[0024] The DC / DC power supply testing system proposed in this application includes a first DC power supply, a second DC power supply, one or more loads (usually multiple loads; this application example uses 10 loads), a conversion component, a detector, and an industrial control computer.

[0025] The industrial control computer is connected to each of the aforementioned loads (if the load is an adjustable electronic load), the first DC power supply, the second DC power supply, the conversion component, and the detector.

[0026] The conversion component is used to connect the DC / DC power supply (i.e., the DC / DC power supply under test, which is not a component of the test system of this application), the various loads, the first DC power supply, and the second DC power supply.

[0027] The conversion assembly has a first switching component between the DC / DC power supply and the first DC power supply and the second DC power supply to connect or disconnect the DC / DC power supply from the first DC power supply or the second DC power supply.

[0028] The conversion component connects or disconnects the DC / DC power supply from each of the aforementioned loads; that is, when the DC / DC power supply is connected, it connects the DC / DC power supply to each of the aforementioned loads. For example, when connecting the DC / DC power supply, the conversion component can directly connect the DC / DC power supply and each load without passing through other electrical components; alternatively, the conversion component can also provide a second switching component between the DC / DC power supply and each load, which connects or disconnects the DC / DC power supply and each load when the DC / DC power supply is connected. For example, the second switching component can connect the DC / DC power supply and part of the load (e.g., connect the loads CH1-CH5, disconnect the loads CH6-CH10).

[0029] The first and second DC power supplies constitute the dual-input DC power supplies of the DC / DC power supply. One (e.g., the first DC power supply) serves as the main power supply, while the other (e.g., the second DC power supply) acts as a backup power supply. The load acts as the receiving device for the DC / DC power supply, reflecting its output voltage, current, and other operating parameters. The industrial control computer can configure the operating parameters of the detector, adjust the load damping, and control the switching operations of various components in the conversion module via configured commands. The conversion module, in turn, responds to the control logic of the industrial control computer, switching the DC power supply to the DC / DC power supply and connecting or disconnecting the load and detector.

[0030] For example, after configuring the control logic to the industrial control computer (ICC), the conversion component responds to the ICC's first command by connecting the first DC power supply and the DC / DC power supply, and disconnecting the second DC power supply and the DC / DC power supply; it then responds again to the ICC's first command by connecting the second DC power supply and the DC / DC power supply, and disconnecting the first DC power supply and the DC / DC power supply. The ICC can control the switching operation of the conversion component via a control board. The testing instrument responds to the ICC's third command by configuring test parameters. The testing instrument detects the operating parameters of the DC / DC power supply in the enabled state. The ICC can obtain the operating parameters for testing the DC / DC power supply from the testing instrument, and after further performance index calculation / analysis, complete the testing work.

[0031] Testing instruments typically need to measure multiple operating parameters, therefore there are various types of testing instruments. For example... Figure 3As shown, in one optional implementation, the tester includes a digital power meter for detecting the voltage and current-related operating parameters of the input power supply; a digital multimeter for detecting the output voltage and current-related operating parameters; and a digital oscilloscope for detecting the output voltage phase, amplitude, and other related operating parameters. Specifically, assuming the performance indicators to be tested include a first DC power supply voltage range, a first DC power supply current, a second DC power supply voltage range, a second DC power supply current, no-load output voltage, full-load output voltage, voltage noise, steady-state time, inrush current, overshoot current, reverse current, short-circuit protection, and input reverse connection protection, the tester needs to detect the operating parameters used to reflect or calculate these performance indicators. It should be noted that if the tested performance indicators change, the tester may need to be replaced accordingly.

[0032] In one optional embodiment, the detector includes a first detection module and a second detection module. The first and second detection modules are respectively connected to a DC / DC power supply. The first detection module detects the input operating parameters of the DC / DC power supply in the enabled state; therefore, the first detection module is connected between the first / second DC power supply and the DC / DC power supply. The first detection module is, for example, a digital wattmeter. The second detection module is used to detect the output operating parameters of the DC / DC power supply in the enabled state; therefore, the second detection module is connected between the DC / DC power supply and the load (to measure load operating parameters), or connected to the DC / DC power supply (to measure reverse-current operating parameters). The second detection module is, for example, a digital oscilloscope, a digital multimeter, etc.

[0033] Since this application targets a dual-input DC / DC power supply, the influence of one DC power supply on the other may need to be considered. In one optional embodiment of this application, the output operating parameters detected by the second detection module include: load operating parameters when the DC / DC power supply is unloaded or driving a load, and reverse-feed operating parameters when the first or second DC power supply drives the DC / DC power supply. Typically, the load operating parameters include multiple operating parameters, while the reverse-feed operating parameters mainly consist of the reverse-feed voltage.

[0034] In addition, since this application targets multi-output DC / DC power supplies, it is necessary to test the operating parameters of multiple loads. Therefore, in one optional embodiment, the second detection module is equipped with a multiplexer to test the data of multiple channels through the same set of detectors.

[0035] The DC / DC power supply requires an enable power supply to operate. This enable power supply can be independent of the test system, providing power separately during DC / DC power supply testing. Alternatively, in another implementation, the enable power supply can be integrated into the conversion component. That is, the test system also includes an enable power supply connected to the conversion component; the conversion component connects or disconnects the enable power supply and the DC / DC power supply. Specifically, when the conversion component is connected to the DC / DC power supply, it connects both the enable power supply and the DC / DC power supply. For example, when connecting the DC / DC power supply, the conversion component can directly connect the DC / DC power supply and the enable power supply without passing through other electrical components; alternatively, the conversion component can also include a third switching component between the DC / DC power supply and the enable power supply, connecting or disconnecting them when the DC / DC power supply is connected.

[0036] As an optional implementation, the first switching assembly is configured to: connect the DC / DC power supply to the first DC power supply or the second DC power supply in the forward direction, or connect the DC / DC power supply to the first DC power supply or the second DC power supply in the reverse direction, or disconnect the DC / DC power supply from the first DC power supply and the second DC power supply.

[0037] In other words, under the control of the industrial control computer, the first switching assembly can forward conduct the DC / DC power supply to the first DC power supply (or the second DC power supply) and disconnect the DC / DC power supply from the second DC power supply (or the first DC power supply); this completes the forward connection (normal operating state) test of the first DC power supply (or the second DC power supply). Alternatively, under the control of the industrial control computer, the DC / DC power supply to the first DC power supply (or the second DC power supply) can be reverse conducted, and disconnected; this completes the reverse connection (reverse connection operating state) test of the first DC power supply (or the second DC power supply). Or, under the control of the industrial control computer, the DC power supply can be disconnected from the DC / DC power supply.

[0038] As an optional implementation, the first switching assembly includes a first switching branch and a second switching branch. The first switching branch connects a first DC power supply to a DC / DC power supply in either the positive or negative direction; the second switching branch connects a second DC power supply to a DC / DC power supply in either the positive or negative direction. The first and second switching branches operate asynchronously.

[0039] In other words, the first switch branch is responsible for controlling the on / off connection and reverse connection between the first DC power supply and the DC / DC power supply, while the second switch branch is responsible for controlling the on / off connection and reverse connection between the second DC power supply and the DC / DC power supply. When the first switch branch is working, the second switch branch is not working, and vice versa, so that only one DC power supply is input to the DC / DC power supply at a time.

[0040] To reduce measurement errors caused by line losses, in one optional embodiment of this application, such as... Figure 3 As shown, both the first and second switch branches include synchronously operating detection harnesses and current-carrying harnesses; the detector obtains the operating parameters to be tested from the detection harnesses. The detection harness is a circuit specifically designed for testing, while the current-carrying harness is the circuit that normally supplies power between the DC / DC power supply and the load. Because it contains multiple channels, the circuit is a bundle rather than a single line.

[0041] Since the two switch branches need to control the forward and reverse connection of the DC power supply respectively, and the design concept of this application is to automate the testing of the DC / DC power supply, in order to simplify the design of the switch branches, it is considered to use two branches to connect the DC power supply from the forward and reverse directions respectively.

[0042] As an optional implementation, both the first switch branch and the second switch branch include a main branch and a secondary branch with opposite connection states, and the main branch and the secondary branch are asynchronously connected.

[0043] The main and auxiliary branches of two switching branches are connected in opposite states (asynchronously). One branch (e.g., the main branch) is responsible for connecting to the DC power supply in the forward direction, and the other branch (e.g., the auxiliary branch) is responsible for connecting to the DC power supply in the reverse direction. The DC power supply can be connected to the DC / DC power supply in either the forward or reverse direction by switching between the main or auxiliary branch. Since the first and second switching branches operate asynchronously, the first switching assembly switches between the first and second switching branches, and further switches between its main and auxiliary branches when one of the switching branches is operating, thereby completing the tests for the forward and reverse connections of the first and second DC power supplies, respectively.

[0044] Taking the load operating parameter and reverse feed operating parameter tests performed in the previous embodiments as an example, in the above-designed implementation of the first switching assembly, it is considered that the first switching branch and the second switching branch are connected, and the DC / DC power supply is connected to the connection point to access the DC power supply. The reverse feed operating parameters when the first DC power supply drives the DC / DC power supply are tested from the second switching branch; the reverse feed operating parameters when the second DC power supply drives the DC / DC power supply are tested from the first switching branch.

[0045] In other words, although the first switching assembly has different switching branches for the first and second DC power supplies, since these branches operate asynchronously, their outputs are connected to the same port and then to the DC / DC power supply. Based on this, the reverse-feeding operating parameters for the first DC power supply driving the DC / DC power supply can be derived from the second switching branch, or vice versa. Independent wiring for the two switching branches allows for flexible determination of the nodes from which the reverse-feeding operating parameters are derived, enhancing the flexibility of the conversion assembly's structural design.

[0046] The conversion component, as a key control component for performing automated testing, includes an input switching section and output current carrying, detection, and enable sections. The output current carrying section connects the DC / DC power supply to each load; the output detection section also connects the DC / DC power supply to each load, but unlike the output current carrying section, it also connects to a detector; the output enable section connects the enable power supply and the DC / DC power supply. Based on the design of the previous embodiment, the output current carrying, detection, and enable sections can all be designed as straight-through circuits, meaning no additional electrical components are designed on the circuit.

[0047] As for the input switching section, as the core part of the conversion component, it is used to switch between the first DC power supply and the second DC power supply, and also needs to consider the forward and reverse switching of the two DC power supplies. For example... Figure 3 As shown, in one alternative implementation, a first switching assembly is constructed using multiple DC contactors.

[0048] like Figure 4 , Figure 5 As shown, a ground input is used as the first DC power supply, and a battery input is used as the second DC power supply. The first switching assembly includes a detection harness and a current-carrying harness. The first switching assembly includes four DC contactors: RL3, RL4, RL7, and RL8, each with four inputs and outputs. Ground input + represents the first DC power supply with forward current carrying capacity, and ground input + (detection) represents the first DC power supply with forward detection capacity; ground input - represents the first DC power supply with reverse current carrying capacity, and ground input - (detection) represents the first DC power supply with reverse detection capacity. Battery input + represents the second DC power supply with forward current carrying capacity, and battery input + (detection) represents the second DC power supply with forward detection capacity; battery input - represents the second DC power supply with reverse current carrying capacity, and battery input - (detection) represents the second DC power supply with reverse detection capacity.

[0049] The first switch branch includes RL3 and RL4. The R1 / R2 and R3 / R4 contacts of RL3 are normally closed contacts, and the 1 / 2 and 3 / 4 contacts are normally open contacts. The R1 / R2 and R3 / R4 contacts of RL4 are normally closed contacts, and the 1 / 2 and 3 / 4 contacts are normally open contacts. The ground input + (detection) is connected to the 3 / 4 contact of RL4 and the R3 / R4 contact of RL3. The ground input + is connected to the 1 / 2 contact of RL4 and the R1 / R2 contact of RL3. The ground input - (detection) is connected to the R3 / R4 contact of RL4 and the 3 / 4 contact of RL3. The ground input - is connected to the R1 / R2 contact of RL4 and the 1 / 2 contact of RL3. The R1 / R2 contacts of RL3 and the R1 / R2 contacts of RL4 constitute the main branch of the current-carrying wire harness of the first switch branch, and the 1 / 2 contacts of RL3 and the 1 / 2 contacts of RL4 constitute the secondary branch of the current-carrying wire harness of the first switch branch; the R3 / R4 contacts of RL3 and the R3 / R4 contacts of RL4 constitute the main branch of the detection wire harness of the first switch branch, and the 3 / 4 contacts of RL3 and the 3 / 4 contacts of RL4 constitute the secondary branch of the detection wire harness of the first switch branch.

[0050] Similarly, the second switch branch includes RL7 and RL8. RL7's R1 / R2 and R3 / R4 contacts are normally closed, and its 1 / 2 and 3 / 4 contacts are normally open. RL8's R1 / R2 and R3 / R4 contacts are normally closed, and its 1 / 2 and 3 / 4 contacts are normally open. Battery input + (detection) is connected to RL8's 3 / 4 contact and RL7's R3 / R4 contact. Battery input + is connected to RL8's 1 / 2 contact and RL7's R1 / R2 contact. Battery input - (detection) is connected to RL8's R3 / R4 contact and RL7's 3 / 4 contact. Ground input - is connected to RL8's R1 / R2 contact and RL7's 1 / 2 contact. The R1 / R2 contacts of RL7 and RL8 constitute the main branch of the current-carrying wire harness of the second switch branch, and the 1 / 2 contacts of RL7 and RL8 constitute the secondary branch of the current-carrying wire harness of the second switch branch; the R3 / R4 contacts of RL7 and RL8 constitute the main branch of the detection wire harness of the second switch branch, and the 3 / 4 contacts of RL7 and RL8 constitute the secondary branch of the detection wire harness of the second switch branch.

[0051] The Power+ and Power- ports provide DC power for reverse-feeding operating parameter detection, while the Feedback+ and Feedback- ports provide DC power for load operating parameter detection. The Power+ port connects to the 1 / 2 contact and R1 / R2 contacts of RL3 and RL7, respectively. The Power- port connects to the 1 / 2 contact and R1 / R2 contacts of RL4 and RL8, respectively. The Feedback+ port connects to the 3 / 4 contact and R3 / R4 contacts of RL3 and RL7, respectively. The Feedback- port connects to the 3 / 4 contact and R3 / R4 contacts of RL4 and RL8, respectively.

[0052] The first and second switch branches are each designed with nodes for outputting reverse-feeding operating parameters; these nodes on both branches are connected to the detector via the same set of ports. For example, based on the aforementioned first switch assembly, the conversion assembly also includes two DC contactors, RL2 and RL6, used as ports for outputting reverse-feeding operating parameters. Figure 4 , Figure 5 As shown, the T1 / L1, T2 / L2, T3 / L3, and 14 / 13 contacts of RL2 and RL6 are all normally open contacts. The T1 / L1 contact of RL2 is connected to the power supply + port, and the T2 / L2 contact of RL2 is connected to the power supply - port to obtain the reverse-feeding operating parameters under the first DC power supply drive. The T1 / L1 contact of RL6 is connected to the power supply + port, and the T2 / L2 contact of RL6 is connected to the power supply - port to obtain the reverse-feeding operating parameters under the second DC power supply drive. The positive and negative lines of the reverse-feeding operating parameters are represented as DMM+ and DMM-, respectively. DMM+ and DMM- can be led out through two ports (i.e., the same set of ports). The T1 / L1 contacts of RL2 and RL6 can be connected to the DMM+ port, and the T2 / L2 contacts of RL2 and RL6 can be connected to the DMM- port. The detector leads out the reverse-feeding operating parameters through the same set of ports.

[0053] Figure 4 , Figure 5 The embodiment illustrates an implementation where the input detection harness and input current-carrying harness are designed with a four-wire system (i.e., separate input detection positive and negative lines and input current-carrying positive and negative lines). Correspondingly, the output detection harness and output current-carrying harness are also designed with a four-wire system, i.e., separate output detection positive and negative lines and output current-carrying positive and negative lines. This reduces measurement errors caused by line losses.

[0054] The above-mentioned DC / DC power supply test system achieves automatic testing through the following methods: S1, the industrial control computer control conversion component connects the first DC power supply and the DC / DC power supply.

[0055] In step S1, turning on the first DC power supply and the DC / DC power supply includes forward turning on the first DC power supply and the DC / DC power supply, and reverse turning on the first DC power supply and the DC / DC power supply. Therefore, in some optional embodiments, step S1 includes: S11, the industrial control computer control conversion component forward conducts the first DC power supply and the DC / DC power supply; and... S12, the industrial control computer control conversion component reverses the conduction of the first DC power supply and the DC / DC power supply.

[0056] S2. The industrial control computer obtains the working parameters from the testing instrument and performs the test.

[0057] Whether the first DC power supply and the DC / DC power supply are forward-biased or reverse-biased, the operating parameters are obtained from the testing instrument for testing. The tested operating parameters are the same parameters used to calculate relevant performance indicators.

[0058] S3, the industrial control computer control conversion component switches the conduction of the second DC power supply and the DC / DC power supply.

[0059] Similarly, in some alternative implementations, step S3 includes: S31, the industrial control computer control conversion component forward conducts the second DC power supply and the DC / DC power supply; and... S32, the industrial control computer control conversion component reverse conducts the second DC power supply and the DC / DC power supply.

[0060] S4. The industrial control computer obtains the working parameters from the testing instrument and performs the test.

[0061] Whether the second DC power supply and DC / DC power supply are forward-biased or reverse-biased, the operating parameters are obtained from the tester for testing.

[0062] Before conducting tests, it is usually necessary to perform a self-test on the testing system's equipment (such as industrial control computers, testing instruments, etc.). Testing can only proceed after the self-test is confirmed to be normal. Figure 6 This is a flowchart illustrating the execution process within a complete test procedure.

[0063] by Figure 4 , Figure 5 Taking the circuit shown as an example, the operation method of the DC / DC power supply test system includes: A. Normal Ground Power Supply Test: The industrial control computer (via test software) sends relevant control commands, causing the normally open contacts T1 / L1, T2 / L2, T3 / L3, and T4 / L4 of DC contactor RL1 to engage; DC contactor RL3 does not operate, while its normally closed contacts R1 / R2 and R3 / R4 remain engaged; DC contactor RL4 does not operate, while its normally closed contacts R1 / R2 and R3 / R4 remain engaged; the ground power supply lines (ground input + and ground input -) and the ground power supply detection lines (ground input + (detection) and ground input - (detection)) are connected, and the operating parameters are obtained through the detector, thus achieving a normal ground power supply test. When DC contactor RL6 operates, its normally open contacts T1 / L1 and T2 / L2 are connected, enabling the testing of reverse-feeding operating parameters (such as reverse-feeding voltage).

[0064] B. Reverse ground power supply test: The industrial control computer software sends relevant control commands, and the normally open contacts T1 / L1, T2 / L2, T3 / L3, and T4 / L4 of DC contactor RL1 are energized; DC contactor RL3 operates, and the normally closed contacts R1 / R2 and R3 / R4 are opened, while the normally open contacts 1 / 2 and 3 / 4 are closed; DC contactor RL4 operates, and the normally closed contacts R1 / R2 and R3 / R4 are opened, while the normally open contacts 1 / 2 and 3 / 4 are closed; the ground power supply line and the ground power supply detection line are both reversed, realizing the reverse ground power supply (input reverse connection protection) test.

[0065] C. Normal Battery Power Supply Test: The industrial control computer software sends relevant control commands, causing the normally open contacts T1 / L1, T2 / L2, T3 / L3, and T4 / L4 of DC contactor RL5 to engage; DC contactor RL7 does not operate, while its normally closed contacts R1 / R2 and R3 / R4 remain engaged; DC contactor RL8 does not operate, while its normally closed contacts R1 / R2 and R3 / R4 remain engaged; the battery power supply lines (battery input + and battery input -) and battery power supply detection lines (battery input + (detection) and battery input - (detection)) are connected, achieving a normal battery power supply test. DC contactor RL2 then operates, connecting its normally open contacts T1 / L1 and T2 / L2, achieving a reverse charging operating parameter test.

[0066] D. Reverse Battery Power Supply Test: The industrial control computer software sends relevant control commands, and the normally open contacts T1 / L1, T2 / L2, T3 / L3, and T4 / L4 of DC contactors RL5 & RL6 are energized; DC contactor RL7 operates, and the normally closed contacts R1 / R2 and R3 / R4 are opened, while the normally open contacts 1 / 2 and 3 / 4 are closed; DC contactor RL8 operates, and the normally closed contacts R1 / R2 and R3 / R4 are opened, while the normally open contacts 1 / 2 and 3 / 4 are closed; the battery power supply line and the battery power supply detection line are both reverse-connected, realizing the reverse battery power supply (input reverse connection protection) test.

[0067] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A DC / DC power supply testing system, characterized in that, include: First DC power supply; second DC power supply; at least one load; conversion components; Detector; Industrial control computers; The industrial control computer is connected to each of the loads, the first DC power supply, the second DC power supply, the conversion component, and the detector. The conversion component is connected to the DC / DC power supply, each of the loads, the first DC power supply, and the second DC power supply; The conversion component connects or disconnects the DC / DC power supply from each of the loads; the conversion component provides a first switching component between the DC / DC power supply and the first DC power supply and the second DC power supply to connect or disconnect the DC / DC power supply from the first DC power supply or the second DC power supply. The detector measures the operating parameters of the DC / DC power supply in the enabled state.

2. The DC / DC power supply testing system as described in claim 1, characterized in that, It also includes an enabling power supply connected to the conversion component; the conversion component connects or disconnects the enabling power supply and the DC / DC power supply.

3. The DC / DC power supply testing system as described in claim 1, characterized in that, The first switching assembly is configured to: connect the DC / DC power supply to the first DC power supply or the second DC power supply in the forward direction, or connect the DC / DC power supply to the first DC power supply or the second DC power supply in the reverse direction, or disconnect the DC / DC power supply from the first DC power supply and the second DC power supply.

4. The DC / DC power supply testing system as described in claim 3, characterized in that, The first switching assembly includes a first switching branch and a second switching branch; the first switching branch connects the first DC power supply to the DC / DC power supply from a positive or negative direction; the second switching branch connects the second DC power supply to the DC / DC power supply from a positive or negative direction; the first switching branch and the second switching branch operate asynchronously.

5. The DC / DC power supply testing system as described in claim 4, characterized in that, Both the first switch branch and the second switch branch include a main branch and a secondary branch; the main branch and the secondary branch are asynchronously connected.

6. The DC / DC power supply testing system as described in claim 4 or 5, characterized in that, The detector includes a first detection module and a second detection module; The first detection module and the second detection module are respectively connected to the DC / DC power supply. The first detection module detects the input operating parameters of the DC / DC power supply in the enabled state, and the second detection module is used to detect the output operating parameters of the DC / DC power supply in the enabled state.

7. The DC / DC power supply testing system as described in claim 6, characterized in that, The output operating parameters include the load operating parameters when the DC / DC power supply is unloaded or driving the load, and the reverse-feed operating parameters when the first DC power supply or the second DC power supply drives the DC / DC power supply.

8. The DC / DC power supply testing system as described in claim 7, characterized in that, The first switch branch and the second switch branch are connected, and the DC / DC power supply is connected to the connection point; the detector tests the reverse power supply operating parameters when the first DC power supply drives the DC / DC power supply to work from the second switch branch; the detector tests the reverse power supply operating parameters when the second DC power supply drives the DC / DC power supply to work from the first switch branch.

9. The DC / DC power supply testing system as described in claim 4, characterized in that, Both the first switch branch and the second switch branch include a detection harness and a current-carrying harness that operate synchronously; the detector obtains the operating parameters from the detection harness.

10. The DC / DC power supply testing system as described in claim 8, characterized in that, The first switch branch and the second switch branch are respectively designed with nodes that lead out the reverse irrigation working parameters; the nodes on the first switch branch and the second switch branch are connected to the detector through the same set of ports.

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