Fuse box testing system and testing method

Abstract

The application discloses a fuse box testing system and a testing method. The system comprises a testing management module and an electronic load, and the testing management module is in communication connection with the electronic load. The testing management module is used for sending a first control signal to the electronic load to control the electronic load to generate a first current in a first time period and a second current in a second time period, acquiring a first voltage of the electronic load in the first time period and a second voltage of the electronic load in the second time period, determining a first test result according to whether the first voltage meets a first preset condition, determining a second test result according to whether the second voltage meets a second preset condition, determining that a fuse box passes a sample test when the first test result and the second test result both represent a pass condition, and determining that the fuse box fails the sample test when any one of the first test result and the second test result represents a fail condition. In this way, accurate testing on the performance of the fuse box is realized.

Description

Technical Field

[0001] This application belongs to the field of intelligent fuse box technology, and in particular relates to a fuse box testing system and testing method. Background Technology

[0002] In addition to distributing power to the circuit, the fuse box also protects the electrical components within the circuit. If the matching margin between the fuse box and the electrical components is too small, the fuse box may trip falsely; if the matching margin is too large, when an overcurrent occurs in the circuit, it can easily cause the circuit to overheat rapidly, potentially burning out the electrical components.

[0003] In existing technologies, mechanical fuse boxes can be tested by simulating constant current overcurrent and detecting whether the fuse blowing time and wiring harness temperature rise meet the threshold.

[0004] However, due to the differences in steady-state and transient characteristics of smart fuse boxes, it is impossible to test them using the method of simulating constant current overcurrent. Therefore, the methods for testing mechanical fuse boxes are not suitable for testing smart fuse boxes. Currently, there is an urgent need for a method to accurately test the performance of smart fuse boxes. Summary of the Invention

[0005] This application provides a fuse box testing system and method, which can solve the problem that the performance of smart fuse boxes cannot be accurately tested in the prior art.

[0006] In a first aspect, embodiments of this application provide a fuse box testing system, which includes a test management module and an electronic load, wherein the test management module is communicatively connected to the electronic load;

[0007] The test management module is used to send a first control signal to the electronic load when the switch between the electronic load and the fuse box is closed, so as to control the electronic load to generate a first current in a first time period and a second current in a second time period, wherein the first current is less than the second current and the duration of the first time period is less than the duration of the second time period.

[0008] The first voltage of the electronic load during the first time period and the second voltage during the second time period are obtained;

[0009] The first test result of the fuse box is determined based on whether the first voltage meets the first preset condition, and the second test result of the fuse box is determined based on whether the second voltage meets the second preset condition.

[0010] If both the first test result and the second test result indicate that the fuse box has passed the test, then the fuse box has passed the sample test.

[0011] If either the first test result or the second test result indicates that the fuse box has failed the test, then the fuse box has failed the sample test.

[0012] Secondly, embodiments of this application provide a fuse box testing method, which is applied to a test management module in a fuse box testing system as shown in any embodiment of the first aspect, the method comprising:

[0013] When the switch between the electronic load and the fuse box is closed, a first control signal is sent to the electronic load to control the electronic load to generate a first current in a first time period and a second current in a second time period. The first current is less than the second current, and the duration of the first time period is less than the duration of the second time period.

[0014] Obtain the first voltage of the electronic load during the first time period and the second voltage during the second time period;

[0015] The first test result of the fuse box is determined based on whether the first voltage meets the first preset condition, and the second test result of the fuse box is determined based on whether the second voltage meets the second preset condition.

[0016] If both the first test result and the second test result indicate that the fuse box has passed the test, then the fuse box has passed the sample test.

[0017] If either the first test result or the second test result indicates that the fuse box has failed the test, then the fuse box has failed the sample test.

[0018] Thirdly, embodiments of this application provide a fuse box testing device, which is applied to a test management module in a fuse box testing system as shown in any embodiment of the first aspect. The device includes:

[0019] The first transmitting module is used to send a first control signal to the electronic load when the switch between the electronic load and the fuse box is closed, so as to control the electronic load to generate a first current in a first time period and a second current in a second time period, wherein the first current is less than the second current and the duration of the first time period is less than the duration of the second time period.

[0020] The first acquisition module is used to acquire the first voltage of the electronic load in a first time period and the second voltage in a second time period;

[0021] The first determining module is used to determine a first test result of the fuse box based on whether the first voltage meets a first preset condition, and to determine a second test result of the fuse box based on whether the second voltage meets a second preset condition;

[0022] The second determining module is used to determine that the fuse box passes the sample test when both the first test result and the second test result indicate that the fuse box has passed the test.

[0023] The third determining module is used to determine that the fuse box has failed the sample test if either the first test result or the second test result indicates that the fuse box has failed the test.

[0024] Fourthly, embodiments of this application provide an electronic device, the device including: a processor and a memory storing computer program instructions.

[0025] When the processor executes computer program instructions, it implements the fuse box testing method as shown in any embodiment of the second aspect.

[0026] Fifthly, embodiments of this application provide a computer storage medium storing computer program instructions, which, when executed by a processor, implement the fuse box testing method shown in any embodiment of the second aspect.

[0027] In a sixth aspect, embodiments of this application provide a computer program product in which instructions, when executed by a processor of an electronic device, cause the electronic device to perform the fuse box testing method shown in any embodiment of the second aspect.

[0028] The fuse box testing system and method of this application embodiment can send a first control signal to an electronic load through a test management module in the fuse box testing system to control the electronic load to generate a first current in a first time period and a second current in a second time period. The first current is less than the second current, and the duration of the first time period is less than the duration of the second time period. Then, the first voltage of the electronic load in the first time period and the second voltage in the second time period are obtained. Based on whether the first voltage meets a first preset condition, the first test result of the fuse box is determined, and based on whether the second voltage meets a second preset condition, the second test result of the fuse box is determined. If both the first test result and the second test result indicate that the fuse box has passed the test, the fuse box is determined to have passed the sample test. If either the first test result or the second test result indicates that the fuse box has failed the test, the fuse box is determined to have failed the sample test. In other words, the test management module can control the electronic load to simulate the generation of transient current (first current) and steady-state current (second current) by electrical components. It then acquires the first voltage corresponding to the transient current and the second voltage corresponding to the steady-state current. Based on these first and second voltages, the performance of the fuse box under transient and steady-state currents is tested. The final test result of the fuse box is determined based on the test results under both transient and steady-state currents. This achieves accurate testing of the smart fuse box's performance. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is one of the architecture diagrams of a fuse box testing system provided in one embodiment of this application;

[0031] Figure 2 This is a second architectural diagram of a fuse box testing system provided in one embodiment of this application;

[0032] Figure 3 This is one of the flowcharts of a fuse box testing method provided in one embodiment of this application.

[0033] Figure 4 This is a schematic diagram of a current curve provided in one embodiment of this application;

[0034] Figure 5 This is a schematic diagram of a voltage curve provided in one embodiment of this application;

[0035] Figure 6This is a second flowchart of a fuse box testing method provided in one embodiment of this application;

[0036] Figure 7 This is the third flowchart of a fuse box testing method provided in one embodiment of this application;

[0037] Figure 8 This is a schematic diagram of the structure of a fuse box testing device provided in one embodiment of this application;

[0038] Figure 9 This is a schematic diagram of the structure of an electronic device provided in one embodiment of this application. Detailed Implementation

[0039] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0041] As mentioned in the background section, in addition to distributing power to the circuit, the vehicle's fuse box also protects the electrical components (such as relays, wiring harnesses, and electrical devices) within the circuit. If the matching margin between the fuse and the electrical component is too small, it may cause the fuse to blow unexpectedly, affecting the normal use of the vehicle. If the matching margin is too large, when the circuit experiences overcurrent or short circuit, it is very easy for the circuit to overheat rapidly. When the circuit's heat resistance limit is reached, it may cause the circuit components to burn out or the vehicle to catch fire.

[0042] Currently, the mainstream low-voltage electrical distribution in vehicles generally uses mechanical electrical fuse boxes, mainly consisting of fuses and relays, to control and protect the electrical components of the low-voltage system.

[0043] The main component responsible for circuit protection in a mechanical fuse box is the fuse. The core of the overload protection performance test method for a mechanical fuse box focuses on the matching relationship between the circuit load power consumption and the fuse. Testing the circuit protection performance of a mechanical fuse box mainly employs simulated constant current overcurrent and simulated short circuit methods. Specific test methods can include: conducting overcurrent tests by simulating constant current conditions at multiples of 135% and 200% of the fuse box's rated current. For example, for a 10A fuse box, its circuit protection performance test can simulate overcurrents of 13.5A and 20A; it can also simulate a short circuit in the circuit controlled by the fuse box.

[0044] The test results mainly consider whether the fuse blowing time and the wiring harness temperature rise parameters meet the design safety thresholds.

[0045] For example, according to the regulatory requirements for fuses, the fusing requirements for type C, D, and F blade fuses (i.e., fuses) can be shown in Table 1.

[0046] Table 1 - Fusing Requirements for Type C, D, and F Chip Fuses

[0047]

[0048] With technological advancements, the automotive industry has gradually entered the era of intelligent vehicles. The more complex electrical architecture and control logic of these vehicles place higher demands on fuse boxes, driving the transition from traditional mechanical fuse boxes to intelligent fuse boxes. Intelligent fuse boxes primarily utilize semiconductor components such as Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs), electronic fuses, and smart switches. They can detect circuit current and voltage, achieving a response time of less than 200μs for short circuits and overcurrents. Furthermore, because the core components of intelligent fuse boxes are semiconductors, they can perform functions not available in traditional mechanical fuse boxes, such as overvoltage protection, undervoltage lockout, reverse current blocking, thermal shutdown, and fault diagnosis, significantly improving circuit protection performance.

[0049] However, during vehicle development, the selection of semiconductor components for the smart fuse box needs to be carefully designed and matched with the power consumption of the electrical load. If the driving capability of the smart fuse box is too small, it may cause the smart fuse box to erroneously turn off when the load is turned on or when the load is in steady state, seriously affecting the normal operation of the vehicle. If the driving capability of the smart fuse box is too large or has defects, the large current in the circuit may not be effectively limited, which may cause serious accidents such as smoke and fire in the wiring harness in extreme cases.

[0050] Due to the differences in steady-state and transient characteristics of semiconductor components, the current mainstream test method of constant ratio current used to test mechanical fuse boxes is not suitable for testing smart fuse boxes and cannot accurately test the performance of smart fuse boxes.

[0051] Based on this, this application provides a fuse box testing method. A test management module in the fuse box testing system sends a first control signal to an electronic load to control the electronic load to generate a first current in a first time period and a second current in a second time period. The first current is less than the second current, and the duration of the first time period is less than the duration of the second time period. Then, the first voltage of the electronic load in the first time period and the second voltage in the second time period are acquired. A first test result of the fuse box is determined based on whether the first voltage meets a first preset condition, and a second test result of the fuse box is determined based on whether the second voltage meets a second preset condition. If both the first and second test results indicate that the fuse box has passed the test, the fuse box is determined to have passed the sample test. If either the first or second test result indicates that the fuse box has failed the test, the fuse box is determined to have failed the sample test. In other words, the test management module can control the electronic load to simulate the generation of transient current (first current) and steady-state current (second current) by electrical components. It then acquires the first voltage corresponding to the transient current and the second voltage corresponding to the steady-state current. Based on these first and second voltages, the performance of the fuse box under transient and steady-state currents is tested. The final test result of the fuse box is determined based on the test results under both transient and steady-state currents. This achieves accurate testing of the smart fuse box's performance.

[0052] Figure 1 This paper illustrates the architecture of a fuse box testing system according to an embodiment of this application.

[0053] like Figure 1 As shown, the fuse box testing system may include a test management module 110 and an electronic load 120, with the test management module 110 and the electronic load 120 being communicatively connected.

[0054] The test management module 110 can be used to send a first control signal to the electronic load 120 when the switch between the electronic load 120 and the fuse box 200 is closed, so as to control the electronic load 120 to generate a first current in a first time period and a second current in a second time period, wherein the first current is less than the second current and the duration of the first time period is less than the duration of the second time period.

[0055] Obtain the first voltage of the electronic load 120 during the first time period and the second voltage during the second time period;

[0056] Based on whether the first voltage meets the first preset condition, the first test result of the fuse box 200 is determined, and based on whether the second voltage meets the second preset condition, the second test result of the fuse box 200 is determined.

[0057] If both the first test result and the second test result indicate that the fuse box 200 has passed the test, then the fuse box 200 has passed the sample test.

[0058] If either the first test result or the second test result indicates that the fuse box 200 has failed the test, then the fuse box 200 has failed the sample test.

[0059] In some implementations, the first preset condition may be that the first voltage is not interrupted and the duration of the first voltage being less than the first voltage threshold does not exceed the first duration threshold. The second preset condition may be that the second voltage is not interrupted and the duration of the second voltage being less than the second voltage threshold does not exceed the second duration threshold.

[0060] Therefore, the test management module in the fuse box test system can send a first control signal to the electronic load to control the electronic load to generate a first current in a first time period and a second current in a second time period. The first current is less than the second current, and the duration of the first time period is less than the duration of the second time period. Then, the first voltage of the electronic load in the first time period and the second voltage in the second time period are obtained. Based on whether the first voltage meets the first preset condition, the first test result of the fuse box is determined, and based on whether the second voltage meets the second preset condition, the second test result of the fuse box is determined. If both the first test result and the second test result indicate that the fuse box has passed the test, the fuse box is determined to have passed the sample test. If either the first test result or the second test result indicates that the fuse box has failed the test, the fuse box is determined to have failed the sample test. In other words, the test management module can control the electronic load to simulate the generation of transient current (first current) and steady-state current (second current) by electrical components. It then acquires the first voltage corresponding to the transient current and the second voltage corresponding to the steady-state current. Based on these first and second voltages, the performance of the fuse box under transient and steady-state currents is tested. The final test result of the fuse box is determined based on the test results under both transient and steady-state currents. This achieves accurate testing of the smart fuse box's performance.

[0061] In some implementations, to test the fuse box more accurately, such as Figure 1 As shown, the fuse box testing system may also include an environmental chamber 130, which is communicatively connected to the test management module 110, and the fuse box 200 is located inside the environmental chamber 130.

[0062] The test management module 110 can also be used to send a fourth control signal to the environmental chamber 130 to control the environmental chamber 130 to adjust its internal temperature to a preset temperature and / or adjust its internal humidity to a preset humidity.

[0063] In this way, by controlling the environmental chamber to simulate the preset temperature and humidity environment, the performance of the fuse box under different temperature and humidity environments can be accurately tested.

[0064] In some implementations, to improve the safety of the fuse box, the test management module 110 can also be used for:

[0065] A second control signal is sent to the electronic load 120 to control the electronic load 120 to generate a third current;

[0066] Detect whether the fuse box 200 disconnects the first circuit within a first preset time period;

[0067] Based on whether the fuse box 200 cuts off the first circuit within a first preset time period, the third test result of the fuse box 200 is determined. The third test result can be used to characterize whether the fuse box passes the smoke test in the sample test stage.

[0068] If the first test result, the second test result, and the third test result all indicate that the fuse box 200 has passed the test, then the fuse box 200 has passed the sample test.

[0069] If any one of the first test result, the second test result, and the third test result indicates that the fuse box 200 has failed the test, then the fuse box 200 has failed the sample test.

[0070] Thus, by conducting a smoke test on the fuse box through the above process, it can be verified whether the fuse box can promptly cut off the circuit when it is not properly matched with electrical components, thereby preventing the wiring harness from smoking and melting, which could lead to danger.

[0071] In some implementations, to further enhance the safety of the fuse box, the test management module 110 can also be used for:

[0072] A third control signal is sent to the electronic load 120 to control the electronic load 120 to simulate a short circuit in the first circuit;

[0073] Detect whether the fuse box 200 disconnects the first circuit within the second preset time period;

[0074] The fourth test result of the fuse box 200 is determined based on whether the fuse box 200 cuts off the first circuit within the second preset time period. The fourth test result can be used to characterize whether the fuse box passes the short circuit test in the sample test stage.

[0075] If the first test result, the second test result, the third test result, and the fourth test result all indicate that the fuse box 200 has passed the test, then the fuse box 200 has passed the sample test.

[0076] If any one of the first test result, the second test result, the third test result, and the fourth test result indicates that the fuse box 200 has failed the test, then the fuse box 200 has failed the sample test.

[0077] Thus, by testing the short-circuit protection performance of the fuse box through the above process, it can be verified whether the fuse box can cut off the circuit in time when a short circuit occurs, thereby further improving the safety of the fuse box.

[0078] In some implementations, to avoid danger during the testing process, such as Figure 1 As shown, the fuse box testing system may also include a programmable power supply 140 and a battery 150, both of which are communicatively connected to the fuse box 200.

[0079] The test management module 110 can also be used to detect whether the first object meets the fifth preset condition;

[0080] If the first object meets any of the fifth preset conditions, the test on the fuse box 200 shall be stopped.

[0081] The fifth preset condition may include:

[0082] The communication node signal loss exceeds the fifth duration threshold;

[0083] The programmable power supply 140 and the storage battery 150 are malfunctioning.

[0084] The temperature of any one of the second objects exceeds the temperature threshold corresponding to the second object. The second object may include the output terminal of the programmable power supply 140, the positive terminal of the battery 150, the surface of the fuse box 200, the interior of the fuse box 200, the power lines of the fuse box 200, the connectors of the fuse box 200, and the environmental compartment 130.

[0085] Thus, by detecting whether the first object meets the fifth preset condition during the test, and terminating the test when the first object meets any of the fifth preset conditions, the danger of the test process can be avoided.

[0086] In some implementations, to further improve the accuracy of fuse box testing, such as Figure 2 As shown, the fuse box testing system may also include an electrical component 160, which can communicate with the test management module 110 and can be integrated into the vehicle.

[0087] Based on this, the test management module can also be used for:

[0088] After confirming that the fuse box 200 has passed the sample test, with the switch between the electronic load 120 and the fuse box 200 open and the switch between the electrical component 160 and the fuse box 200 closed, the third voltage during the start-up process and the fourth voltage after start-up of the electrical component 160 are obtained.

[0089] Based on whether the third voltage meets the third preset condition, the fifth test result of the fuse box 200 is determined, and based on whether the fourth voltage meets the fourth preset condition, the sixth test result of the fuse box 200 is determined.

[0090] If both the fifth and sixth test results indicate that the fuse box 200 has passed the test, then the fuse box 200 has passed both the sample test and the real vehicle test.

[0091] If either the fifth test result or the sixth test result indicates that the fuse box 200 has failed the test, then the fuse box 200 has failed the real vehicle test.

[0092] Therefore, after the prototype passes the test, the fuse box can be tested on a real vehicle to further improve the accuracy of the test results.

[0093] In some implementations, the third preset condition may be that the third voltage is not interrupted, the electrical components are working normally, and the duration of the third voltage being less than the third voltage threshold does not exceed the third duration threshold. The fourth preset condition may be that the fourth voltage is not interrupted, the electrical components are working normally, and the duration of the fourth voltage being less than the fourth voltage threshold does not exceed the fourth duration threshold.

[0094] In some implementations, to improve the safety of the fuse box, the test management module 110 can also be used for:

[0095] When the switch between the electrical component 160 and the fuse box 200 is open and the switch between the electronic load 120 and the fuse box 200 is closed, a fifth control signal is sent to the electronic load 120 to control the electronic load 120 to generate a fourth current. The fourth current can be obtained by correcting the withstand current of the second circuit in which the electronic load is located based on a correction coefficient. The correction coefficient can be negatively correlated with the number of circuits in the integrated wiring harness in which the second circuit is located. The second circuit can be integrated into the vehicle.

[0096] The test determines whether the fuse box 200 cuts off the second circuit within the third preset time period, which is less than the calibrated smoke generation time of the circuit under the fourth current.

[0097] The seventh test result of fuse box 200 is determined based on whether fuse box 200 cuts off the second circuit within the third preset time period. The seventh test result can be used to characterize whether fuse box 200 passes the smoke test in the actual vehicle test phase.

[0098] If the fifth test result, the sixth test result, and the seventh test result all indicate that the fuse box 200 has passed the test, then the fuse box 200 has passed the sample test and the real vehicle test.

[0099] If any one of the fifth, sixth, and seventh test results indicates that the fuse box 200 has failed the test, then the fuse box 200 has failed the real vehicle test.

[0100] Thus, by conducting a smoke test on the fuse box in a real vehicle through the above process, taking into account the impact of wiring harness integration on the smoke current, it is possible to more accurately verify whether the fuse box can cut off the circuit in time when it is not properly matched with electrical components, thereby preventing the wiring harness from smoking and melting, which could lead to danger.

[0101] In some implementations, to further enhance the safety of the fuse box, the test management module 110 can also be used for:

[0102] When the switch between the electrical component 160 and the fuse box 200 is open and the switch between the electronic load 120 and the fuse box 200 is closed, a sixth control signal is sent to the electronic load 120 to control the electronic load 120 to simulate a short circuit in the second circuit.

[0103] Check whether the fuse box 200 cuts off the second circuit within the fourth preset time period;

[0104] The eighth test result of the fuse box 200 is determined based on whether the fuse box 200 cuts off the second circuit within the fourth preset time period. The eighth test result is used to characterize whether the fuse box passes the short circuit test in the actual vehicle test phase.

[0105] If the fifth, sixth, seventh, and eighth test results all indicate that the fuse box 200 has passed the test, then the fuse box 200 has passed both the sample test and the real vehicle test.

[0106] If any one of the fifth, sixth, seventh, and eighth test results indicates that the fuse box 200 has failed the test, then the fuse box 200 has failed the real vehicle test.

[0107] Thus, by conducting real-vehicle tests on the short-circuit protection performance of the fuse box through the above process, we can more accurately verify whether the fuse box can promptly cut off the circuit when a short circuit occurs, thereby further improving the safety of the fuse box.

[0108] In some implementations, to prevent hazards during the testing process, the test management module 110 can also be used for:

[0109] Check whether the third object meets the sixth preset condition;

[0110] If the third object meets any of the sixth preset conditions, the test on the fuse box 200 shall be stopped.

[0111] The sixth preset condition may include:

[0112] The communication node signal loss exceeds the sixth duration threshold;

[0113] The programmable power supply 140 and the storage battery 150 are malfunctioning.

[0114] The temperature of any of the fourth objects exceeds the temperature threshold corresponding to the fourth object. The fourth object may include the output terminal of the programmable power supply 140, the positive terminal of the battery 150, the surface of the fuse box 200, the interior of the fuse box 200, the power lines of the fuse box 200, the connectors of the fuse box 200, and the circuit where the electrical component 160 is located.

[0115] Thus, by detecting whether the third object meets the sixth preset condition during the test, and terminating the test when the third object meets any of the sixth preset conditions, the danger of the test process can be avoided.

[0116] For details of the process, please refer to the following method embodiments, which will not be elaborated here.

[0117] Figure 3 A schematic flowchart of a fuse box testing method provided in one embodiment of this application is shown.

[0118] Figure 3 The entity executing the fuse box testing method shown can be the test management module in the fuse box testing system described in any of the above system embodiments. For example... Figure 3 As shown, the fuse box testing method may include the following steps:

[0119] S310, when the switch between the electronic load and the fuse box is closed, sends a first control signal to the electronic load to control the electronic load to generate a first current in a first time period and a second current in a second time period.

[0120] S320, acquire the first voltage of the electronic load during the first time period and the second voltage during the second time period;

[0121] S330, determine the first test result of the fuse box based on whether the first voltage meets the first preset condition, and determine the second test result of the fuse box based on whether the second voltage meets the second preset condition;

[0122] S340, if both the first test result and the second test result indicate that the fuse box has passed the test, it is determined that the fuse box has passed the sample test;

[0123] S350, if either the first test result or the second test result indicates that the fuse box has failed the test, it is determined that the fuse box has failed the sample test.

[0124] Therefore, the test management module in the fuse box test system can send a first control signal to the electronic load to control the electronic load to generate a first current in a first time period and a second current in a second time period. The first current is less than the second current, and the duration of the first time period is less than the duration of the second time period. Then, the first voltage of the electronic load in the first time period and the second voltage in the second time period are obtained. Based on whether the first voltage meets the first preset condition, the first test result of the fuse box is determined, and based on whether the second voltage meets the second preset condition, the second test result of the fuse box is determined. If both the first test result and the second test result indicate that the fuse box has passed the test, the fuse box is determined to have passed the sample test. If either the first test result or the second test result indicates that the fuse box has failed the test, the fuse box is determined to have failed the sample test. In other words, the test management module can control the electronic load to simulate the generation of transient current (first current) and steady-state current (second current) by electrical components. It then acquires the first voltage corresponding to the transient current and the second voltage corresponding to the steady-state current. Based on these first and second voltages, the performance of the fuse box under transient and steady-state currents is tested. The final test result of the fuse box is determined based on the test results under both transient and steady-state currents. This achieves accurate testing of the smart fuse box's performance.

[0125] Regarding the S310, the fuse box can be a smart fuse box. The electronic load can be a controllable electronic load.

[0126] The first current can be less than the second current, and the duration of the first time period can be less than the duration of the second time period. That is, the first current can be a transient current, and the second current can be a steady-state current. The first control signal can be used to control the transient and steady-state currents of the electronic load simulating electrical components. For example, the transient and steady-state currents can be as follows: Figure 4 As shown. With Figure 4 The corresponding load terminal voltage, load ground voltage, battery voltage, and DC-DC power supply (DCDC) voltage can be obtained as follows: Figure 5 As shown, the battery voltage and the DC-DC voltage coincide, and the load terminal voltage and the load ground voltage partially coincide.

[0127] Here, the test management module can control the closing of the switch between the electronic load and the fuse box, and then send a first control signal to the electronic load to control the electronic load to generate a first current in a first time period and a second current in a second time period.

[0128] For example, such as Figure 1 As shown, the test management module 110 can control switches SW1, SW2, ..., SWn to connect to "1", so that the electronic load 120 is connected to the fuse box 200. Then, it sends a first control signal to the electronic load 120 to control the electronic load 120 to generate a 13A current for 0.5s and a 2.5A current for 3.5s.

[0129] In some implementations, to more accurately test the fuse box, the method may further include:

[0130] A fourth control signal is sent to the environmental chamber to control the environmental chamber to adjust its internal temperature to a preset temperature and / or its internal humidity to a preset humidity.

[0131] Here, the environmental chamber can be used to simulate the temperature and humidity environment of the fuse box. The fourth control signal can be used to control the environmental chamber to simulate the temperature and humidity environment of the smart fuse box according to a preset temperature and / or preset humidity. The preset temperature and preset humidity can be set manually.

[0132] For example, such as Figure 1 As shown, the test management module 110 can send a fourth control signal to the environmental chamber 130 to control the environmental chamber 130 to adjust the temperature inside the chamber to a preset temperature and the humidity inside the chamber to a preset humidity.

[0133] In this way, by controlling the environmental chamber to simulate the preset temperature and humidity environment, the performance of the fuse box under different temperature and humidity environments can be accurately tested.

[0134] Regarding the S320, the test management module can acquire the first voltage of the electronic load in the first time period and the second voltage in the second time period.

[0135] Regarding S330, the first test result can be the transient test result during the prototype testing phase, which characterizes whether the fuse box passes the transient test during the prototype testing phase. The second test result can be the steady-state test result during the prototype testing phase, which characterizes whether the fuse box passes the steady-state test during the prototype testing phase.

[0136] Specifically, if the first voltage meets the first preset condition, the first test result indicates that the fuse box has passed the transient test of the prototype testing stage; if the first voltage does not meet the first preset condition, the first test result indicates that the fuse box has failed the transient test of the prototype testing stage. If the second voltage meets the second preset condition, the second test result indicates that the fuse box has passed the steady-state test of the prototype testing stage; if the second voltage does not meet the second preset condition, the second test result indicates that the fuse box has failed the steady-state test of the prototype testing stage.

[0137] Here, by combining transient and steady-state currents and simulating electrical components with an electronic load, it can be verified whether the fuse box has sufficient driving capability under design conditions to ensure that the electrical components work properly.

[0138] In some implementations, the first preset condition may be that the first voltage is not interrupted and the duration of the first voltage being less than the first voltage threshold does not exceed the first duration threshold. The second preset condition may be that the second voltage is not interrupted and the duration of the second voltage being less than the second voltage threshold does not exceed the second duration threshold.

[0139] The absence of an interruption in the first voltage indicates that the fuse box's drive terminal remains closed during the first time period. The absence of an interruption in the second voltage indicates that the fuse box's drive terminal remains closed during the second time period.

[0140] For example, the first preset condition may be that the drive terminal of the fuse box remains closed during the first time period, and the duration of the first voltage being less than 11V does not exceed 15ms.

[0141] The second preset condition can be that the drive terminal of the fuse box remains closed during the second time period, and the duration of the second voltage being less than 11V does not exceed 15ms.

[0142] Regarding S340, if both the first and second test results indicate that the test has passed, then it can be determined that the fuse box has passed the sample test.

[0143] Regarding S350, if either the first test result or the second test result indicates that the test fails, it can be determined that the fuse box has failed the sample test.

[0144] In some embodiments, to improve the safety of the fuse box, the method may further include:

[0145] A second control signal is sent to the electronic load to control the electronic load to generate a third current;

[0146] Detect whether the fuse box disconnects the first circuit within a first preset time period;

[0147] The third test result of the fuse box is determined based on whether the fuse box cuts off the first circuit within the first preset time period;

[0148] Based on this, S340 may include:

[0149] If the first test result, the second test result, and the third test result all indicate that the fuse box has passed the test, then the fuse box is determined to have passed the sample test.

[0150] The S350 may include:

[0151] If any one of the first test result, the second test result, and the third test result indicates that the fuse box has failed the test, then the fuse box has failed the sample test.

[0152] Here, the third current can be the withstand current of the first circuit where the electronic load is located. The first preset duration can be less than the rated smoke emission duration of the first circuit under the withstand current. The withstand current and rated smoke emission duration of the first circuit can be the withstand current and rated smoke emission duration of the wiring harness of the first circuit. The withstand current and the rated smoke emission duration corresponding to the withstand current can be obtained in advance by referring to a table based on the wiring harness design values ​​of the first circuit and the technical standards followed by the wiring harness.

[0153] For example, the first preset duration may not exceed one-tenth of the calibrated smoke generation duration corresponding to the withstand current.

[0154] The third test result can be used to characterize whether the fuse box passes the smoke test in the sample testing stage.

[0155] Specifically, the test management module can send a second control signal to the electronic load to control the electronic load to generate a third current, and then detect whether the fuse box cuts off the first circuit within a first preset time period. If the fuse box cuts off the first circuit within the first preset time period, the third test result indicates that the fuse box has passed the smoke test of the sample test stage. If the fuse box does not cut off the first circuit within the first preset time period, the third test result indicates that the fuse box has not passed the smoke test of the sample test stage.

[0156] Thus, by conducting a smoke test on the fuse box through the above process, it can be verified whether the fuse box can promptly cut off the circuit when it is not properly matched with electrical components, thereby preventing the wiring harness from smoking and melting, which could lead to danger.

[0157] In some implementations, to further enhance the safety of the fuse box, the method may further include:

[0158] A third control signal is sent to the electronic load to control the electronic load to simulate a short circuit in the first circuit;

[0159] Detect whether the fuse box disconnects the first circuit within the second preset time period;

[0160] The fourth test result of the fuse box is determined based on whether the fuse box cuts off the first circuit within the second preset time period;

[0161] Based on this, determining that the fuse box passes the sample test when the first test result, the second test result, and the third test result all indicate that the fuse box has passed the test can include:

[0162] If the first test result, the second test result, the third test result, and the fourth test result all indicate that the fuse box has passed the test, then the fuse box is determined to have passed the sample test.

[0163] Determining that the fuse box has failed the sample test when any one of the first test result, the second test result, and the third test result indicates that the fuse box has failed the test may include:

[0164] If any one of the first test result, the second test result, the third test result, and the fourth test result indicates that the fuse box has failed the test, then the fuse box has failed the sample test.

[0165] Here, the third control signal can control the electronic load to simulate a short circuit in the first circuit. The fourth test result can be used to characterize whether the fuse box passes the short-circuit test in the prototype testing phase.

[0166] Specifically, the test management module can send a third control signal to the electronic load to control the electronic load to simulate a short circuit in the first circuit it is in, and then detect whether the fuse box disconnects the first circuit within a second preset time period. If the fuse box disconnects the first circuit within the second preset time period, the fourth test result indicates that the fuse box has passed the short circuit test in the sample test stage. If the fuse box does not disconnect the first circuit within the second preset time period, the fourth test result indicates that the fuse box has not passed the short circuit test in the sample test stage.

[0167] For example, the second preset duration can be less than 500us.

[0168] Thus, by testing the short-circuit protection performance of the fuse box through the above process, it can be verified whether the fuse box can cut off the circuit in time when a short circuit occurs, thereby further improving the safety of the fuse box.

[0169] In some implementations, to avoid danger during the testing process, the method may further include:

[0170] Check whether the first object meets the fifth preset condition;

[0171] If the first object meets any of the fifth preset conditions, the test on the fuse box is stopped.

[0172] The fifth preset condition may include:

[0173] The communication node signal loss exceeds the fifth duration threshold;

[0174] Abnormal output from the programmable power supply and battery;

[0175] The temperature of any one of the second objects exceeds the temperature threshold corresponding to the second object. The second object may include the output terminal of the programmable power supply, the positive terminal of the battery, the surface of the fuse box, the interior of the fuse box, the power circuitry of the fuse box, the connectors of the fuse box, and the environmental compartment.

[0176] Here, abnormal output of the programmable power supply and battery can specifically refer to: the voltage difference between the programmable power supply and the battery being greater than the first voltage difference threshold for a duration exceeding the sixth duration threshold; or the output current of the programmable power supply or the output current of the battery being greater than the current threshold for a duration exceeding the seventh duration threshold.

[0177] Specifically, during the testing process, the test management module can detect: whether the communication node signal loss exceeds the fifth duration threshold; whether the duration for which the voltage difference between the programmable power supply and the battery exceeds the first voltage difference threshold exceeds the sixth duration threshold; whether the duration for which the output current of the programmable power supply and the output current of the battery exceeds the current threshold exceeds the seventh duration threshold; whether the temperature at the output terminal of the programmable power supply exceeds the first temperature threshold; whether the temperature of the positive terminal of the battery exceeds the second temperature threshold; whether the surface temperature of the fuse box exceeds the third temperature threshold; whether the internal temperature of the fuse box exceeds the fourth temperature threshold; whether the temperature of the power circuit of the fuse box exceeds the fifth temperature threshold; whether the temperature of the connector of the fuse box exceeds the sixth temperature threshold; and whether the temperature of the environmental chamber exceeds the seventh temperature threshold. If any one of these exceeds the threshold, the test needs to be terminated; if none of these exceed the threshold, the test does not need to be terminated.

[0178] Thus, by detecting whether the first object meets the fifth preset condition during the test, and terminating the test when the first object meets any of the fifth preset conditions, the danger of the test process can be avoided.

[0179] The above process can be used for testing the smart fuse box at the prototype stage. This smart fuse box can be used in vehicles. To improve the accuracy of the fuse box testing, real vehicle testing can also be conducted after the prototype is installed in the vehicle. The real vehicle testing stage of the smart fuse box is described below.

[0180] In some implementations, to further improve the accuracy of fuse box testing, after determining that the fuse box has passed the sample test, the method may further include:

[0181] When the switch between the electronic load and the fuse box is open and the switch between the electrical component and the fuse box is closed, obtain the third voltage during the start-up process of the electrical component and the fourth voltage after start-up;

[0182] The fifth test result of the fuse box is determined based on whether the third voltage meets the third preset condition, and the sixth test result of the fuse box is determined based on whether the fourth voltage meets the fourth preset condition.

[0183] If both the fifth and sixth test results indicate that the fuse box has passed the test, then the fuse box has passed both the sample test and the real vehicle test.

[0184] If either the fifth test result or the sixth test result indicates that the fuse box has failed the test, then the fuse box has failed the real vehicle test.

[0185] Here, the fifth test result can be the transient test result during the actual vehicle test phase, which can characterize whether the fuse box passes the transient test during the actual vehicle test phase. The sixth test result can be the steady-state test result during the actual vehicle test phase, which can characterize whether the fuse box passes the steady-state test during the actual vehicle test phase.

[0186] Specifically, the test management module can control the opening and closing of the switch between the electronic load and the fuse box, and control the closing and closing of the switch between the electrical components and the fuse box. For example, such as... Figure 2 As shown, the test management module 110 can control switches SW1, SW2, ..., SWn to connect to "2", so that electrical component 160 is connected to fuse box 200.

[0187] Then, the electrical components can be started. The test management module can obtain the third voltage during the start-up process and the fourth voltage after start-up. In this way, the third voltage can be the transient voltage and the fourth voltage can be the steady-state voltage.

[0188] If the third voltage meets the third preset condition, the fifth test result indicates that the fuse box has passed the transient test in the actual vehicle testing phase. If the third voltage does not meet the fourth preset condition, the fifth test result indicates that the fuse box has failed the transient test in the actual vehicle testing phase. If the fourth voltage meets the fourth preset condition, the sixth test result indicates that the fuse box has passed the steady-state test in the actual vehicle testing phase. If the fourth voltage does not meet the fourth preset condition, the sixth test result indicates that the fuse box has failed the steady-state test in the actual vehicle testing phase.

[0189] In some implementations, the third preset condition may be that the third voltage is not interrupted, the electrical components are working normally, and the duration of the third voltage being less than the third voltage threshold does not exceed the third duration threshold. The fourth preset condition may be that the fourth voltage is not interrupted, the electrical components are working normally, and the duration of the fourth voltage being less than the fourth voltage threshold does not exceed the fourth duration threshold.

[0190] The absence of an interruption in the third voltage indicates that the fuse box's drive terminal remains closed. The absence of an interruption in the fourth voltage indicates that the fuse box's drive terminal remains closed.

[0191] For example, the third preset condition can be that the drive terminal of the fuse box remains closed, the electrical components operate normally, and the duration of the third voltage being less than 11V does not exceed 15ms.

[0192] The fourth preset condition can be that the drive terminal of the fuse box remains closed, the electrical components operate normally, and the duration of the fourth voltage being less than 11V does not exceed 15ms.

[0193] Therefore, after the prototype passes the test, the fuse box can be tested on a real vehicle to further improve the accuracy of the test results.

[0194] In some embodiments, to improve the safety of the fuse box, the method may further include:

[0195] When the switch between the electrical component and the fuse box is open and the switch between the electronic load and the fuse box is closed, a fifth control signal is sent to the electronic load to control the electronic load to generate a fourth current.

[0196] The test checks whether the fuse box cuts off the second circuit within the third preset time period, which is less than the calibrated smoke generation time of the circuit under the fourth current.

[0197] The seventh test result of the fuse box is determined based on whether the fuse box cuts off the second circuit within the third preset time period;

[0198] Based on this, when both the fifth and sixth test results indicate that the fuse box has passed the test, determining that the fuse box has passed the sample test and the actual vehicle test may include:

[0199] If the fifth, sixth, and seventh test results all indicate that the fuse box has passed the test, then the fuse box has passed both the sample test and the real vehicle test.

[0200] Determining that the fuse box has failed the real-vehicle test when either the fifth or sixth test result indicates that the fuse box has failed the test may include:

[0201] If any one of the fifth, sixth, and seventh test results indicates that the fuse box has failed the test, then the fuse box has failed the real vehicle test.

[0202] Here, since the actual vehicle wiring harness is an integration of multiple wiring harnesses, the heat dissipation of the power supply wiring harness deteriorates in the integrated wiring harness environment. Therefore, the withstand current needs to be adjusted according to the wiring harness bundling situation. The fourth current can be obtained by correcting the withstand current of the second circuit where the electronic load is located based on a correction factor. Specifically, the fourth current can be equal to the product of the correction factor and the withstand current. The correction factor can be negatively correlated with the number of circuits in the integrated wiring harness where the second circuit is located, and the second circuit can be integrated into the vehicle.

[0203] For example, I smoke_c =I smoke *C d , among which, I smoke_c For the fourth current, I smoke To withstand current, C d The correction factor is 0.4 ≤ C d ≤1.

[0204] The third preset duration can be less than the calibrated smoke generation duration of the second circuit under the fourth current. For example, the third preset duration can not exceed one-tenth of the calibrated smoke generation duration corresponding to the fourth current.

[0205] The seventh test result can be used to characterize whether the fuse box passes the smoke test in the real vehicle testing phase.

[0206] Specifically, the test management module can send a fifth control signal to the electronic load to control the electronic load to generate a fourth current, and then detect whether the fuse box cuts off the second circuit within a third preset time period. If the fuse box cuts off the second circuit within the third preset time period, the seventh test result indicates that the fuse box has passed the smoke test in the actual vehicle test phase. If the fuse box does not cut off the second circuit within the third preset time period, the seventh test result indicates that the fuse box has not passed the smoke test in the actual vehicle test phase.

[0207] Thus, by conducting a smoke test on the fuse box in a real vehicle through the above process, taking into account the impact of wiring harness integration on the smoke current, it is possible to more accurately verify whether the fuse box can cut off the circuit in time when it is not properly matched with electrical components, thereby preventing the wiring harness from smoking and melting, which could lead to danger.

[0208] In some implementations, to further enhance the safety of the fuse box, the method may further include:

[0209] When the switch between the electrical component and the fuse box is open and the switch between the electronic load and the fuse box is closed, a sixth control signal is sent to the electronic load to control the electronic load to simulate a short circuit in the second circuit.

[0210] Check whether the fuse box disconnects the second circuit within the fourth preset time period;

[0211] The eighth test result of the fuse box is determined based on whether the fuse box cuts off the second circuit within the fourth preset time period.

[0212] Based on this, when the fifth, sixth, and seventh test results all indicate that the fuse box has passed the test, determining that the fuse box has passed the sample test and the actual vehicle test may include:

[0213] If the fifth, sixth, seventh, and eighth test results all indicate that the fuse box has passed the test, then the fuse box has passed both the sample test and the real vehicle test.

[0214] Determining that the fuse box has failed the real-vehicle test when any one of the fifth, sixth, and seventh test results indicates that the fuse box has failed the test may include:

[0215] If any one of the fifth, sixth, seventh, and eighth test results indicates that the fuse box has failed the test, then the fuse box has failed the real vehicle test.

[0216] Here, the sixth control signal can control the electronic load to simulate a short circuit in the second circuit. The tenth test result can be the short circuit test result from the actual vehicle testing phase.

[0217] The eighth test result can be used to characterize whether the fuse box passes the short-circuit test in the real vehicle testing phase.

[0218] Specifically, the test management module can send a sixth control signal to the electronic load to control the electronic load to simulate a short circuit in its own second circuit. Then, it can detect whether the fuse box disconnects the second circuit within a fourth preset time period. If the fuse box disconnects the second circuit within the fourth preset time period, the eighth test result indicates that the fuse box has passed the short circuit test in the real vehicle test phase. If the fuse box does not disconnect the second circuit within the fourth preset time period, the eighth test result indicates that the fuse box has failed the short circuit test in the real vehicle test phase.

[0219] For example, the fourth preset duration can be less than 500us.

[0220] It should be noted that the short-circuit test in the prototype testing phase is based on a simulated temperature and humidity environment, while the short-circuit test in the real vehicle testing phase is based on a real temperature and humidity environment.

[0221] Thus, by conducting real-vehicle tests on the short-circuit protection performance of the fuse box through the above process, we can more accurately verify whether the fuse box can promptly cut off the circuit when a short circuit occurs, thereby further improving the safety of the fuse box.

[0222] In some implementations, to avoid danger during the testing process, the method may further include:

[0223] Check whether the third object meets the sixth preset condition;

[0224] If the third object meets any of the sixth preset conditions, the test on the fuse box shall be stopped.

[0225] The sixth preset condition may include:

[0226] The communication node signal loss exceeds the eighth duration threshold;

[0227] Abnormal output from the programmable power supply and battery;

[0228] The temperature of any of the fourth objects exceeds the temperature threshold corresponding to the fourth object. The fourth object may include the output terminal of the programmable power supply, the positive terminal of the battery, the surface of the fuse box, the interior of the fuse box, the power lines of the fuse box, the connectors of the fuse box, and the circuit containing the electrical components.

[0229] Here, abnormal output of the programmable power supply and battery can specifically refer to: the voltage difference between the programmable power supply and the battery being greater than the second voltage difference threshold for a duration exceeding the ninth duration threshold; or the output current of the programmable power supply or the output current of the battery being greater than the current threshold for a duration exceeding the tenth duration threshold.

[0230] Specifically, during the testing process, the test management module can detect: whether the communication node signal loss exceeds the eighth duration threshold; whether the duration for which the voltage difference between the programmable power supply and the battery exceeds the second voltage difference threshold exceeds the ninth duration threshold; whether the duration for which the output current of the programmable power supply and the output current of the battery exceeds the current threshold exceeds the tenth duration threshold; whether the temperature at the output terminal of the programmable power supply exceeds the eighth temperature threshold; whether the temperature of the positive terminal of the battery exceeds the ninth temperature threshold; whether the surface temperature of the fuse box exceeds the tenth temperature threshold; whether the internal temperature of the fuse box exceeds the eleventh temperature threshold; whether the temperature of the power circuit of the fuse box exceeds the twelfth temperature threshold; whether the temperature of the connector of the fuse box exceeds the thirteenth temperature threshold; and whether the temperature of the environmental chamber exceeds the fourteenth temperature threshold. If any one of these exceeds the threshold, the test needs to be terminated; if none of these exceed the threshold, the test does not need to be terminated.

[0231] Thus, by detecting whether the third object meets the sixth preset condition during the test, and terminating the test when the third object meets any of the sixth preset conditions, the danger of the test process can be avoided.

[0232] It should be noted that all thresholds and preset values ​​involved in the embodiments of this application can be preset by humans.

[0233] Based on the above embodiments, such as Figure 6 As shown, the fuse box testing method may include: S610, vehicle performance definition; S620, component development; S630, component testing (i.e., prototype testing); S640, vehicle performance testing (i.e., real vehicle testing).

[0234] Here, prior to S630 and S640, the test data required for the testing process in S630 and S640 can be determined based on the vehicle and component parameters provided in S610 and S620.

[0235] Specifically, before the testing begins, for the component testing phase, a test execution sequence can be written based on the design materials provided in phases S610 and S620 as input. This test sequence is mainly a two-dimensional multi-parameter matrix of test phase / temperature (°C) / humidity (%) / output voltage (V) / analog current (A) - time (ms), and can support graphical compilation, table import, and other formats.

[0236] The “phase-time” approach describes each stage of the test, making it easier for test evaluators to manage.

[0237] "Temperature / Humidity-Time" can describe the output control of the test management module on the environmental chamber;

[0238] "Voltage-time" can describe the test management module's output control of the programmable power supply;

[0239] "Current-time" can describe the output control of the electronic load by the test management module. Depending on the equipment parameters, multiple channels can be controlled simultaneously.

[0240] Before the test begins, the design materials provided in stages S610 and S620 can be used as input to write safety boundaries for the parameters during the test. By setting boundary parameters, abnormal situations can be identified and the test can be terminated. The safety boundary can be the fifth preset condition in the above embodiments, which will not be elaborated here.

[0241] Furthermore, before the testing begins, for the vehicle performance testing phase, the test execution sequence can be written based on the design materials provided in phases S610 and S620 as input. Simultaneously, the wiring harness smoke test current can be corrected based on the wiring harness drawings completed during the vehicle engineering design phase. This test sequence is primarily a two-dimensional multi-parameter matrix of test phase / output voltage V / simulated current A-time ms, supporting graphical compilation and table import.

[0242] The “phase-time” approach describes each stage of the test, making it easier for test evaluators to manage.

[0243] "Voltage-time" can describe the test management module's output control of the programmable power supply;

[0244] "Current-time" can describe the output control of the electronic load by the test management module. Depending on the equipment parameters, multiple channels can be controlled simultaneously.

[0245] Before the test begins, the design materials provided in stages S610 and S620 can be used as input to write safety boundaries for the parameters during the test. By setting boundary parameters, abnormal situations can be identified and the test can be terminated. The safety boundary can be the sixth preset condition in the above embodiments, which will not be elaborated here.

[0246] The fuse box testing method provided in this application conforms to the vehicle development process. During the prototype testing phase, the fuse box can be verified based on design inputs, significantly shortening the verification cycle and reducing potential problems during real-vehicle testing. During real-vehicle testing, the test content can be modified according to the actual vehicle conditions. Three test methods closely related to vehicle applications are used: verification based on the actual vehicle usage environment, correction for the actual temperature tolerance of the wiring harness, and simulation of short circuits in weak points of the wiring in the actual vehicle, thereby improving the accuracy of the tests.

[0247] In addition, such as Figure 7 As shown, the fuse box testing method may include the following steps:

[0248] S701, Electrical Component Power Consumption Design Input.

[0249] Here, during the vehicle design and development phase, the design values ​​of power consumption for each electrical component of the vehicle can be obtained, as well as the driving performance parameters of the semiconductors in each circuit of the smart fuse box and the wiring harness design parameters, to establish a test database.

[0250] S702, Simulation drive electrical component testing.

[0251] Here, electrical components can be tested by simulating the drive of an electronic load.

[0252] In the early stages of R&D for a single fuse box product, prototype testing can be conducted based on the design inputs. The purpose of the prototype testing phase is to ensure that the fuse box meets the design requirements and can reliably distribute power to the entire vehicle. Only fuse boxes that pass the verification can be installed in the vehicle.

[0253] First, the transient value I of the current can be designed in conjunction with the electrical components. peak (i.e., the first current) and steady-state value I con (That is, the second current) is simulated using an electronic load to verify whether the fuse box has sufficient driving capability under the design conditions, ensuring the normal operation of electrical components. During the test, the fuse box should not experience a circuit interruption, and the duration of the voltage at the electrical component terminals being less than 11V should not exceed 15ms. Secondly, the wiring harness design value for this circuit can be obtained by looking up the table according to the technical standards followed by the wiring harness. smoke Current value I of smoke generation over time smoke The simulation was conducted using an electronic load to verify whether an improper match between the fuse box and electrical components would cause the wiring harness to smoke and melt. During the test, the fuse box should be within t cut1 The circuit is cut off within a certain time period, t cut1 ≤0.1*t smoke Third, a short circuit can be simulated using an electronic load to test the fuse box's protective performance when a short circuit occurs. During the test, the fuse box should be kept within a certain range. cut2 The circuit is cut off within a certain time period, t cut2 <500μs.

[0254] For example, testing one channel of a fuse box can be performed as follows: First, a test sequence is created or imported. After the test management module runs the test sequence, it checks whether the fuse box test system exceeds the boundary parameter values. If no problems are found, the power supply output to the programmable power supply is adjusted according to the "voltage-time" parameter in the sequence. Simultaneously, the environmental adjustment phase is initiated based on the "temperature / humidity-time" parameter, raising the environmental chamber conditions to the target value. The environmental chamber then provides feedback via the bus to confirm whether the current temperature and humidity have reached the set target. Once the environmental temperature and humidity reach the set conditions, the test management module controls the output of the electronic load according to the "current-time" parameter in the test sequence. Transient current testing, steady-state current testing, wiring harness smoke current testing, and short-circuit testing are performed on the same channel.

[0255] S703 determines whether the test of the analog drive electrical components has passed. If yes, proceed to S704; otherwise, the test has failed.

[0256] S704, Real vehicle drive electrical component testing.

[0257] Here, if the simulated drive electrical component test passes, the fuse box can be installed in the vehicle. After installation, the power consumption of the electrical components can be obtained, and the fuse box can be tested in a real vehicle environment. Alternatively, the fuse box can be tested based on the characteristics of the actual vehicle wiring and the withstand current value of the wiring harness design. Furthermore, a short circuit can be simulated at the terminal of the actual vehicle electrical component to verify the protection performance of the fuse box under the condition of a short circuit in the circuit.

[0258] First, in a real-vehicle environment, the capacitance and inductance between different electrical components and wiring harnesses may cause the current value of the actual electrical components to deviate from the design value. Therefore, the test data in the real-vehicle testing phase should collect the actual values ​​under real-vehicle conditions as input, and verify whether the fuse box has sufficient driving capability under the design state. During the test, the fuse box should not experience circuit interruption, and the duration of the electrical component terminal voltage being less than 11V should not exceed 15ms. Second, generally speaking, a vehicle-level wiring harness is an integration of multiple wiring harnesses. The power supply wiring harness has poor heat dissipation in an integrated wiring harness environment. Therefore, the smoke current needs to be corrected according to the wiring harness bundling situation. After correction, the test current I smoke_c =I smoke *C d C d This is a correction factor for the number of integrated power circuits, related to the number of power circuits in the integrated wiring harness, and has a value of [0.4, 1]. During the test, the fuse box should be within t... cut1 The circuit is cut off within a certain time period, t cut1 ≤0.1*t smoke Third, a short circuit can be simulated using an electronic load to test the fuse box's protection performance when a short circuit occurs. During the test, the fuse box should be kept within t...cut2 The circuit is cut off within a time interval, t cut2 <500μs.

[0259] For example, testing one channel of a fuse box can be performed as follows: First, a test sequence is created or imported. After the test management module runs the test sequence, it checks whether the fuse box test system exceeds the boundary parameter values. If no problems are found, the power supply output is controlled by the "voltage-time" parameter in the sequence. The test management module controls the output of the electronic load according to the "current-time" parameter in the test sequence. Transient current test, steady-state current test, wiring harness smoke current test, and circuit short-circuit test are performed on the same channel.

[0260] In addition, during the actual vehicle testing, it is necessary to collect the power consumption characteristics of electrical components under actual vehicle conditions. If it is found that the power consumption information collected from the actual vehicle exceeds the design state, the test event needs to be recorded, and after verification and confirmation by other vehicles, the transient and steady-state test power consumption characteristics of electrical components are stored in the database.

[0261] S705 determines whether the test of the actual vehicle's drive electrical components has passed. If yes, the test passes; otherwise, it fails. If the test fails, the fuse box can be adjusted or replaced before retesting.

[0262] Furthermore, the test database can be maintained and updated based on real-vehicle test results. This embodiment of the application can establish a test database, allowing for adjustments to power consumption values ​​from the design phase during real-vehicle testing. Completed test sequences can be directly saved in the test management system for reuse in subsequent vehicle development, improving testing efficiency and reducing test evaluation costs.

[0263] Based on the above embodiments, the fuse box testing system provided in this application can, as follows: Figure 1 As shown, it includes: a test management module 110 (including acquisition sensors), an electronic load 120, an environmental chamber 130, a programmable power supply 140, a storage battery 150, and electrical components 160.

[0264] Among them, the test management module 110, as the core of the fuse box test system, has functions such as analog quantity acquisition (temperature acquisition, voltage acquisition, current acquisition), output control (electronic load control, programmable power supply control, temperature and humidity environment chamber control), bus communication, and real-time monitoring and safety protection functions. It can also complete the temperature and humidity setting of the environment chamber 130, the voltage setting of the programmable power supply 140, and the setting of the electronic load 120 according to the test requirements.

[0265] The test management module 110 is characterized by its ability to acquire data across the entire testing process, including test power consumption control, fuse box status monitoring, and external analog quantity monitoring, enabling automated testing. When abnormal conditions such as overvoltage, undervoltage, overcurrent, or thermal runaway occur in the fuse box test system, it can automatically determine whether a set threshold has been exceeded and automatically terminate the test.

[0266] The voltage acquisition module of the test management module 110 mainly samples the voltage of the programmable power supply 140, battery 150, fuse box power supply port, output port, and electronic load 120. The sampling voltage range is ±60V, the resolution is not less than 12 bits, and the sampling frequency is not less than 1kHz. The current module mainly samples the current of each channel of the programmable power supply 140, battery 150, and fuse box drive terminal. Depending on the type of external current sensor, it preferably covers a range of [10A, 1000A], with a resolution not less than 12 bits and a sampling frequency not less than 1kHz. The temperature acquisition module mainly samples the output terminal of the programmable power supply 140, the battery 150 terminal, the fuse box surface, the fuse box power lines and connectors, the ambient temperature, and the ambient temperature. The sensor covers [-40℃, 200℃], with a resolution not less than 8 bits and a sampling frequency not less than 100kHz.

[0267] The test management module 110 can read the status of the fuse box's own drive switch and fault diagnosis status via the CAN bus and display it in the status display module. The status display module can also display the execution and interruption status during the test. The bus communication protocol is provided by the fuse box supplier or the vehicle manufacturer. The test management module 110 can also monitor and control the status of the programmable power supply 140, the environmental chamber 130, and the electronic load 120 via CAN / 232 / 485 buses.

[0268] The combined power supply (programmable power supply 140 and battery 150) is connected in parallel with the high-power programmable power supply 140 and the lead-acid battery 150. Its feature is that the lead-acid battery has good transient discharge characteristics, which can ensure that there is no power transient drop during the test of the fuse box.

[0269] The environmental chamber 130 can provide different temperature and humidity environments for testing, simulating the conditions a vehicle is in under different temperature and humidity conditions. During the prototype testing phase, the fuse box can be placed inside the environmental chamber 130.

[0270] The electronic load 120 can simulate the power consumption of electrical components controlled by the fuse box. It can simulate the transient and steady-state currents of the electrical components, as well as the design limit current (i.e., withstand current) of the wiring harness, and the short circuit conditions that may exist in the circuit. The electronic load 120 can achieve precise control of the loop current.

[0271] Furthermore, the fuse box 200, being the object under test, mainly consists of a power supply port, a communication port, and a drive port. The power input to the fuse box 200 consists of a programmable power supply 140 and a lead-acid battery 150 connected in parallel. The drive port of the fuse box 200 is connected to the electronic load 120 via a wiring harness. Different channels of the electronic load 120 simulate load power consumption, enabling the drive port to drive the electronic load 120 in a simulation environment.

[0272] The fuse box testing system provided in this application embodiment can automatically perform testing, conduct high-precision product performance verification under different temperature and humidity conditions in advance, reduce the probability of failure in high temperature and high humidity environments during the actual vehicle testing stage, and effectively reduce the testing cost during the actual vehicle testing stage. In addition, the fuse box testing system can also realize automatic evaluation of test results and monitoring of abnormal state risks, reduce evaluation costs and improve testing efficiency.

[0273] Based on the above embodiments, the fuse box testing system provided in this application can also be as follows: Figure 2 As shown, it includes: a test management module 110 (including acquisition sensors), an electronic load 120, a programmable power supply 140, a storage battery 150, and electrical components 160.

[0274] Furthermore, the fuse box 200 is the object under test. It is fixed to the corresponding location on the actual vehicle. During transient and steady-state load tests, the electrical component 160 of the actual vehicle is used; during smoke and short-circuit tests, the electronic load 120 is used. The load consumption of the actual vehicle's electrical components will differ from the product design due to factors such as operating conditions and the capacitance and inductance of the electrical system. The power input to the fuse box 200 consists of a programmable power supply 140 and a lead-acid battery 150 connected in parallel, with the lead-acid battery 150 using the original vehicle battery. The drive port of the fuse box 200 is directly connected to the electronic load 120 via a wiring harness. Different channels of the electronic load 120 simulate load power consumption. The electronic load 120 should be connected closer to the electrical component 160 to simulate various abnormal operating conditions that may occur with the electrical component 160 as closely as possible.

[0275] The voltage acquisition module of the test management module 110 mainly samples the voltage of the programmable power supply 140, battery 150, fuse box 200 power supply port, output port, and electronic load 120. The sampling voltage range is ±60V, the resolution is not less than 12 bits, and the sampling frequency is not less than 1kHz. The current module mainly samples the current of each channel of the programmable power supply 140, battery 150, and fuse box 200 drive terminals. Depending on the type of external current sensor, it can cover a range of [10A, 1000A], with a resolution of not less than 12 bits and a sampling frequency of not less than 1kHz. The temperature acquisition module mainly samples the output terminal of the programmable power supply 140, the battery 150 terminals, the surface of the fuse box 200, the power lines and connectors of the fuse box 200, and the ambient temperature. The sensor covers [-40℃, 200℃], with a resolution of not less than 8 bits and a sampling frequency of not less than 100kHz.

[0276] The test management module 110 can read the status of the fuse box's own drive switch and fault diagnosis status via the CAN bus and display it in the status display module. The status display module can also display the execution and interruption status during the test. The bus communication protocol is provided by the fuse box supplier or the vehicle manufacturer. The test management module 110 can also monitor and control the status of the programmable power supply 140 and the electronic load 120 via CAN / 232 / 485 buses.

[0277] here, Figure 2 The fuse box test system shown is Figure 1 The difference in the fuse box testing system shown is the absence of an environmental chamber, because... Figure 2 The fuse box testing system shown can be used in the real vehicle testing phase, as it operates in a real environment and does not require an environmental chamber to simulate temperature and humidity. Other parts are the same as described above. Figure 1 The fuse box testing system shown is the same, so it will not be described in detail here.

[0278] The fuse box testing system provided in this application is compatible with both component testing and vehicle performance testing, and can achieve automated testing. In addition, the design of safety boundary parameters is introduced, which enables the fuse box testing system to monitor abnormal state risks and improve the safety of the testing process.

[0279] Based on the same inventive concept, this application also provides a fuse box testing device. The following is in conjunction with… Figure 8 The fuse box testing device provided in the embodiments of this application will be described in detail.

[0280] Figure 8 A schematic diagram of the structure of a fuse box testing device provided in one embodiment of this application is shown.

[0281] like Figure 8 As shown, this fuse box testing device can be applied to the test management module of the fuse box testing system described in any of the above system embodiments. The device may include:

[0282] The first transmitting module 801 is used to send a first control signal to the electronic load when the switch between the electronic load and the fuse box is closed, so as to control the electronic load to generate a first current in a first time period and a second current in a second time period, wherein the first current is less than the second current and the duration of the first time period is less than the duration of the second time period.

[0283] The first acquisition module 802 is used to acquire the first voltage of the electronic load in a first time period and the second voltage in a second time period;

[0284] The first determining module 803 is used to determine the first test result of the fuse box based on whether the first voltage meets the first preset condition, and to determine the second test result of the fuse box based on whether the second voltage meets the second preset condition;

[0285] The second determining module 804 is used to determine that the fuse box passes the sample test when both the first test result and the second test result indicate that the fuse box has passed the test.

[0286] The third determining module 805 is used to determine that the fuse box has failed the sample test if either the first test result or the second test result indicates that the fuse box has failed the test.

[0287] Therefore, the test management module in the fuse box test system can send a first control signal to the electronic load to control the electronic load to generate a first current in a first time period and a second current in a second time period. The first current is less than the second current, and the duration of the first time period is less than the duration of the second time period. Then, the first voltage of the electronic load in the first time period and the second voltage in the second time period are obtained. Based on whether the first voltage meets the first preset condition, the first test result of the fuse box is determined, and based on whether the second voltage meets the second preset condition, the second test result of the fuse box is determined. If both the first test result and the second test result indicate that the fuse box has passed the test, the fuse box is determined to have passed the sample test. If either the first test result or the second test result indicates that the fuse box has failed the test, the fuse box is determined to have failed the sample test. In other words, the test management module can control the electronic load to simulate the generation of transient current (first current) and steady-state current (second current) by electrical components. It then acquires the first voltage corresponding to the transient current and the second voltage corresponding to the steady-state current. Based on these first and second voltages, the performance of the fuse box under transient and steady-state currents is tested. The final test result of the fuse box is determined based on the test results under both transient and steady-state currents. This achieves accurate testing of the smart fuse box's performance.

[0288] In some embodiments, to improve the safety of the fuse box, the device may further include:

[0289] The second transmitting module is used to send a second control signal to the electronic load to control the electronic load to generate a third current, the third current being the withstand current of the first circuit in which the electronic load is located.

[0290] The first detection module is used to detect whether the fuse box cuts off the first circuit within a first preset time period, which is less than the calibrated smoke generation time of the first circuit under the withstand current.

[0291] The fourth determining module is used to determine the third test result of the fuse box based on whether the fuse box cuts off the first circuit within the first preset time period. The third test result is used to characterize whether the fuse box passes the smoke test in the sample testing stage.

[0292] The second determining module 804 may include:

[0293] The first determining submodule is used to determine that the fuse box passes the sample test when the first test result, the second test result, and the third test result all indicate that the fuse box passes the test.

[0294] The third determining module 805 may include:

[0295] The second determining submodule is used to determine that the fuse box has failed the sample test if any one of the first test result, the second test result, and the third test result indicates that the fuse box has failed the test.

[0296] In some embodiments, to further enhance the safety of the fuse box, the device may also include:

[0297] The third transmitting module is used to send a third control signal to the electronic load to control the electronic load to simulate a short circuit in the first circuit;

[0298] The second detection module is used to detect whether the fuse box cuts off the first circuit within a second preset time period;

[0299] The fifth determining module is used to determine the fourth test result of the fuse box based on whether the fuse box cuts off the first circuit within the second preset time period. The fourth test result is used to characterize whether the fuse box passes the short circuit test in the sample testing stage.

[0300] The first determining submodule may include:

[0301] The first determining unit is configured to determine that the fuse box passes the sample test when the first test result, the second test result, the third test result, and the fourth test result all indicate that the fuse box passes the test.

[0302] The second determination submodule may include:

[0303] The second determining unit is used to determine that the fuse box has failed the sample test if any one of the first test result, the second test result, the third test result, and the fourth test result indicates that the fuse box has failed the test.

[0304] In some embodiments, to more accurately test the fuse box, the device may further include:

[0305] The fourth transmitting module is used to send a fourth control signal to the environmental chamber to control the environmental chamber to adjust its internal temperature to a preset temperature and / or adjust its internal humidity to a preset humidity.

[0306] In some embodiments, to further improve the accuracy of fuse box testing, the device may further include:

[0307] The second acquisition module is used to acquire the third voltage during the start-up process and the fourth voltage after start-up when the switch between the electronic load and the fuse box is open and the switch between the electrical component and the fuse box is closed after the fuse box is determined to have passed the sample test.

[0308] The sixth determining module is used to determine the fifth test result of the fuse box based on whether the third voltage meets the third preset condition, and to determine the sixth test result of the fuse box based on whether the fourth voltage meets the fourth preset condition.

[0309] The seventh determining module is used to determine whether the fuse box passes the sample test and the actual vehicle test if both the fifth test result and the sixth test result indicate that the fuse box has passed the test.

[0310] The eighth determining module is used to determine that the fuse box has failed the real vehicle test if either the fifth test result or the sixth test result indicates that the fuse box has failed the test.

[0311] In some embodiments, to improve the safety of the fuse box, the device may further include:

[0312] The fifth transmitting module is used to send a fifth control signal to the electronic load when the switch between the electrical component and the fuse box is open and the switch between the electronic load and the fuse box is closed, so as to control the electronic load to generate a fourth current. The fourth current is obtained by correcting the withstand current of the second circuit where the electronic load is located based on the correction coefficient. The correction coefficient is negatively correlated with the number of circuits in the integrated wiring harness where the second circuit is located. The second circuit is integrated on the vehicle.

[0313] The third detection module is used to detect whether the fuse box cuts off the second circuit within a third preset time period, which is less than the calibrated smoke generation time of the circuit under the fourth current.

[0314] The ninth determining module is used to determine the seventh test result of the fuse box based on whether the fuse box cuts off the second circuit within the third preset time period. The seventh test result is used to characterize whether the fuse box passes the smoke test in the actual vehicle test phase.

[0315] The seventh determining module may include:

[0316] The third determining submodule is used to determine whether the fuse box passes the sample test and the actual vehicle test when the fifth test result, the sixth test result and the seventh test result all indicate that the fuse box passes the test.

[0317] The eighth determining module may include:

[0318] The fourth determining submodule is used to determine that the fuse box has failed the real vehicle test if any one of the fifth test result, the sixth test result, and the seventh test result indicates that the fuse box has failed the test.

[0319] In some implementations, the first preset condition is that the first voltage is not interrupted and the duration of the first voltage being less than the first voltage threshold does not exceed the first duration threshold; the second preset condition is that the second voltage is not interrupted and the duration of the second voltage being less than the second voltage threshold does not exceed the second duration threshold.

[0320] In some implementations, the third preset condition is that the third voltage is not interrupted, the electrical components are working normally, and the duration of the third voltage being less than the third voltage threshold does not exceed the third duration threshold. The fourth preset condition is that the fourth voltage is not interrupted, the electrical components are working normally, and the duration of the fourth voltage being less than the fourth voltage threshold does not exceed the fourth duration threshold.

[0321] Figure 9 A schematic diagram of the structure of an electronic device provided in one embodiment of this application is shown.

[0322] like Figure 9 As shown, the electronic device 9 is a structural diagram of an exemplary hardware architecture of an electronic device capable of implementing the fuse box testing method and fuse box testing apparatus according to the embodiments of this application. This electronic device may refer to the electronic device in the embodiments of this application.

[0323] The electronic device 9 may include a processor 901 and a memory 902 storing computer program instructions.

[0324] Specifically, the processor 901 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0325] Memory 902 may include mass storage for data or instructions. For example, and not limitingly, memory 902 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 902 may include removable or non-removable (or fixed) media. Where appropriate, memory 902 may be internal or external to an integrated gateway disaster recovery device. In a particular embodiment, memory 902 is non-volatile solid-state memory. In a particular embodiment, memory 902 may include read-only memory (ROM), random access memory (RAM), disk storage media device, optical storage media device, flash memory device, electrical, optical, or other physical / tangible memory storage device. Thus, generally, memory 902 includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to one aspect of this application.

[0326] The processor 901 reads and executes computer program instructions stored in the memory 902 to implement any of the fuse box testing methods in the above embodiments.

[0327] In one example, the electronic device may also include a communication interface 903 and a bus 904. Wherein, for example... Figure 9 As shown, the processor 901, memory 902, and communication interface 903 are connected through bus 904 and complete communication with each other.

[0328] The communication interface 903 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of this application.

[0329] Bus 904 includes hardware, software, or both, that couples components of an electronic device together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 904 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, any suitable bus or interconnect is contemplated herein.

[0330] The electronic device can perform the fuse box testing method in the embodiments of this application, thereby achieving the combination Figures 3 to 8 The described method and apparatus for testing fuse boxes.

[0331] Furthermore, in conjunction with the fuse box testing methods in the above embodiments, this application embodiment can provide a computer storage medium for implementation. This computer storage medium stores computer program instructions, which, when executed by a processor, implement any of the fuse box testing methods in the above embodiments.

[0332] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0333] The functional blocks shown in the above-described structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0334] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0335] The aspects of this application have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by dedicated hardware performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0336] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A fuse box testing system, characterized in that, The system includes a test management module and an electronic load, and the test management module is communicatively connected to the electronic load. The test management module is used to send a first control signal to the electronic load when the switch between the electronic load and the fuse box is closed, so as to control the electronic load to generate a first current in a first time period and a second current in a second time period, wherein the first current is greater than the second current and the duration of the first time period is less than the duration of the second time period. Obtain the first voltage of the electronic load during the first time period and the second voltage during the second time period; The first test result of the fuse box is determined based on whether the first voltage meets the first preset condition, and the second test result of the fuse box is determined based on whether the second voltage meets the second preset condition; the first preset condition is that the first voltage is not interrupted and the duration of the first voltage being less than the first voltage threshold does not exceed the first duration threshold; the second preset condition is that the second voltage is not interrupted and the duration of the second voltage being less than the second voltage threshold does not exceed the second duration threshold. If both the first test result and the second test result indicate that the fuse box has passed the test, then the fuse box has passed the sample test. If either the first test result or the second test result indicates that the fuse box has failed the test, then the fuse box has failed the sample test.

2. The fuse box testing system according to claim 1, characterized in that, The system also includes an environmental chamber, which is communicatively connected to the test management module, and the fuse box is located inside the environmental chamber. The test management module is also used to send a fourth control signal to the environmental chamber to control the environmental chamber to adjust its internal temperature to a preset temperature and / or adjust its internal humidity to a preset humidity.

3. The fuse box testing system according to claim 1, characterized in that, The system also includes electrical components that are communicatively connected to the test management module and are integrated into the vehicle. The test management module is also used to, after determining that the fuse box has passed the sample test, obtain the third voltage during the start-up process and the fourth voltage after the start-up of the electrical component when the switch between the electronic load and the fuse box is open and the switch between the electrical component and the fuse box is closed; The fifth test result of the fuse box is determined based on whether the third voltage meets the third preset condition, and the sixth test result of the fuse box is determined based on whether the fourth voltage meets the fourth preset condition. If both the fifth and sixth test results indicate that the fuse box has passed the test, then the fuse box has passed both the sample test and the real vehicle test. If either the fifth test result or the sixth test result indicates that the fuse box has failed the test, then the fuse box has failed the real vehicle test.

4. The fuse box testing system according to claim 3, characterized in that, The third preset condition is that the third voltage is not interrupted, the electrical components are working normally, and the duration of the third voltage being less than the third voltage threshold does not exceed the third duration threshold. The fourth preset condition is that the fourth voltage is not interrupted, the electrical components are working normally, and the duration of the fourth voltage being less than the fourth voltage threshold does not exceed the fourth duration threshold.

5. A method for testing fuse boxes, characterized in that, The method is applied to the test management module of the fuse box test system according to any one of claims 1-4, and the method includes: When the switch between the electronic load and the fuse box is closed, a first control signal is sent to the electronic load to control the electronic load to generate a first current in a first time period and a second current in a second time period, wherein the first current is greater than the second current and the duration of the first time period is less than the duration of the second time period. Obtain the first voltage of the electronic load during the first time period and the second voltage during the second time period; The first test result of the fuse box is determined based on whether the first voltage meets the first preset condition, and the second test result of the fuse box is determined based on whether the second voltage meets the second preset condition. The first preset condition is that the first voltage is not interrupted and the duration of the first voltage being less than the first voltage threshold does not exceed the first duration threshold. The second preset condition is that the second voltage is not interrupted and the duration of the second voltage being less than the second voltage threshold does not exceed the second duration threshold. If both the first test result and the second test result indicate that the fuse box has passed the test, then the fuse box has passed the sample test. If either the first test result or the second test result indicates that the fuse box has failed the test, then the fuse box has failed the sample test.

6. The fuse box testing method according to claim 5, characterized in that, The method further includes: A second control signal is sent to the electronic load to control the electronic load to generate a third current, wherein the third current is the withstand current of the first circuit in which the electronic load is located; The detection function checks whether the fuse box cuts off the first circuit within a first preset time period, where the first preset time period is less than the calibrated smoke generation time of the first circuit under the withstand current. Based on whether the fuse box cuts off the first circuit within the first preset time period, a third test result of the fuse box is determined. The third test result is used to characterize whether the fuse box passes the smoke test in the sample testing stage. The step of determining that the fuse box has passed the sample test when both the first test result and the second test result indicate that the fuse box has passed the test includes: If the first test result, the second test result, and the third test result all indicate that the fuse box has passed the test, then the fuse box is determined to have passed the sample test. The step of determining that the fuse box has failed the sample test when either the first test result or the second test result indicates that the fuse box has failed the test includes: If any one of the first test result, the second test result, and the third test result indicates that the fuse box has failed the test, then the fuse box has failed the sample test.

7. The fuse box testing method according to claim 6, characterized in that, The method further includes: A third control signal is sent to the electronic load to control the electronic load to simulate a short circuit in the first circuit; Detect whether the fuse box disconnects the first circuit within a second preset time period; Based on whether the fuse box cuts off the first circuit within the second preset time period, a fourth test result of the fuse box is determined. The fourth test result is used to characterize whether the fuse box passes the short-circuit test in the sample testing stage. The step of determining that the fuse box has passed the sample test when the first test result, the second test result, and the third test result all indicate that the fuse box has passed the test includes: If the first test result, the second test result, the third test result, and the fourth test result all indicate that the fuse box has passed the test, then the fuse box is determined to have passed the sample test. The step of determining that the fuse box has failed the sample test when any one of the first test result, the second test result, and the third test result indicates that the fuse box has failed the test includes: If any one of the first test result, the second test result, the third test result, and the fourth test result indicates that the fuse box has failed the test, then the fuse box has failed the sample test.

8. The fuse box testing method according to any one of claims 5-7, characterized in that, The method further includes: A fourth control signal is sent to the environmental chamber to control the environmental chamber to adjust its internal temperature to a preset temperature and / or its internal humidity to a preset humidity.

9. The fuse box testing method according to claim 5, characterized in that, After determining that the fuse box has passed the sample test, the method further includes: When the switch between the electronic load and the fuse box is open and the switch between the electrical component and the fuse box is closed, obtain the third voltage during the start-up process and the fourth voltage after the start-up of the electrical component; The fifth test result of the fuse box is determined based on whether the third voltage meets the third preset condition, and the sixth test result of the fuse box is determined based on whether the fourth voltage meets the fourth preset condition. If both the fifth and sixth test results indicate that the fuse box has passed the test, then the fuse box has passed both the sample test and the real vehicle test. If either the fifth test result or the sixth test result indicates that the fuse box has failed the test, then the fuse box has failed the real vehicle test.

10. The fuse box testing method according to claim 9, characterized in that, The method further includes: When the switch between the electrical component and the fuse box is open and the switch between the electronic load and the fuse box is closed, a fifth control signal is sent to the electronic load to control the electronic load to generate a fourth current. The fourth current is obtained by correcting the withstand current of the second circuit in which the electronic load is located based on a correction coefficient. The correction coefficient is negatively correlated with the number of circuits in the integrated wiring harness in which the second circuit is located. The second circuit is integrated in the vehicle. The test detects whether the fuse box cuts off the second circuit within a third preset time period, where the third preset time period is less than the calibrated smoke generation time of the circuit under the fourth current. Based on whether the fuse box cuts off the second circuit within the third preset time period, the seventh test result of the fuse box is determined. The seventh test result is used to characterize whether the fuse box passes the smoke test in the actual vehicle test phase. When both the fifth and sixth test results indicate that the fuse box has passed the test, determining that the fuse box has passed the sample test and the real vehicle test includes: If the fifth, sixth, and seventh test results all indicate that the fuse box has passed the test, then the fuse box has passed both the sample test and the real vehicle test. If either the fifth test result or the sixth test result indicates that the fuse box has failed the test, determining that the fuse box has failed the real vehicle test includes: If any one of the fifth, sixth, and seventh test results indicates that the fuse box has failed the test, then the fuse box has failed the real vehicle test.

11. The fuse box testing method according to claim 9, characterized in that, The third preset condition is that the third voltage is not interrupted, the electrical components are working normally, and the duration of the third voltage being less than the third voltage threshold does not exceed the third duration threshold. The fourth preset condition is that the fourth voltage is not interrupted, the electrical components are working normally, and the duration of the fourth voltage being less than the fourth voltage threshold does not exceed the fourth duration threshold.

Images