A durability test device for a hydrogen circulation pump

Abstract

The application provides a durability test device for a hydrogen circulation pump, and belongs to the technical field of fuel cell engines, and solves the problem that the prior art cannot verify the durability of the hydrogen circulation pump. The device comprises, in sequence, an air inlet structure, a pressure selection unit for outputting normal pressure gas or high pressure gas, a multi-channel test unit for testing the durability of a hydrogen circulation pump to be tested by the normal pressure gas or high pressure gas, and an air outlet structure. Each channel of the multi-channel test unit is independent and parallel, and each channel is provided with a hydrogen circulation pump to be tested and a control device for controlling the flow and pressure of the input gas of the hydrogen circulation pump to be tested. The hydrogen circulation pump is tested by the device, which greatly accelerates the verification time of the durability, effectively saves the development cost and improves the user experience, since the fuel cell engine does not need to be verified and verified in the actual vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cell engine, and particularly relates to a durability test device for a hydrogen circulation pump. BACKGROUND

[0002] The fuel cell engine is a device for generating electric energy by electrochemical reaction of hydrogen and oxygen to generate water, and has the advantages of high power generation efficiency, low environmental pollution, high specific energy and low noise, and is widely concerned in the field of new energy and has a good application prospect in the field of automobiles.

[0003] The hydrogen circulation pump is a core component of the fuel cell engine, and the durability of the hydrogen circulation pump directly determines the performance of the fuel cell engine. At present, there is no test device for verifying the durability of the hydrogen circulation pump, and it is an urgent problem to be solved in the development of the fuel cell engine industry to propose a test device for verifying the durability of the hydrogen circulation pump. SUMMARY

[0004] In view of the above analysis, the embodiments of the present application aim to provide a durability test device for a hydrogen circulation pump to solve the problem that the prior art cannot verify the durability of the hydrogen circulation pump.

[0005] In one aspect, the embodiments of the present application provide a durability test device for a hydrogen circulation pump, comprising a controller and an air inlet structure, a pressure selection unit, a multi-channel test unit and an air outlet structure connected in sequence; wherein,

[0006] Each channel in the multi-channel test unit is independent and parallel, and each channel is provided with a to-be-tested hydrogen circulation pump and a control device for controlling the flow and pressure of the input gas of the to-be-tested hydrogen circulation pump;

[0007] The controller is configured to control the pressure selection unit to output gas with a set pressure according to a pressure test instruction input by a user, select a corresponding channel of the multi-channel test unit, control the to-be-tested hydrogen circulation pump in the selected channel to perform durability test at a set power, and obtain test data of whether all to-be-tested hydrogen circulation pumps are stuck, and further obtain a test result of whether the durability of the to-be-tested hydrogen circulation pump is qualified.

[0008] The beneficial effects of the above technical solutions are as follows: in order to verify the durability of the hydrogen circulating pump to be tested, a durability test device for the hydrogen circulating pump is provided, which provides important support for durability test. Through the device, the hydrogen circulating pump to be tested is tested independently, which greatly saves the verification time, and since the fuel cell engine whole machine does not need to be verified and the vehicle needs to be carried, the development cost is greatly saved. Moreover, the durability of the hydrogen circulating pump to be tested is determined by setting multiple pressures, which is beneficial to support the design and development work through the test.

[0009] Based on the further improvement of the above device, the regulating device on each channel of the multi-channel test unit comprises a shut-off valve and a flow stabilizer connected in sequence; wherein,

[0010] The shut-off valve and the flow stabilizer are connected in sequence and connected to the gas inlet end of the hydrogen circulating pump to be tested in the channel;

[0011] The output end of the controller is connected to the control end of all shut-off valves and flow stabilizers, and the shut-off valve and the flow stabilizer of each channel are independently controlled to independently test the hydrogen circulating pump to be tested in different channels.

[0012] Further, the regulating device on each channel of the multi-channel test unit further comprises a throttle valve; wherein,

[0013] The input end of the throttle valve is connected to the gas outlet end of the hydrogen circulating pump to be tested in the channel, the output end is connected to the gas inlet of the gas outlet structure, and the control end is connected to the output end of the controller;

[0014] The controller is also used to control the opening of the throttle valve on the selected channel to adjust the pressure rise of the gas passing through the hydrogen circulating pump to be tested in the channel.

[0015] Further, the device further comprises an air filter for controlling particulate matter in the gas discharged from the gas inlet structure; wherein,

[0016] The input end of the air filter is connected to the gas outlet end of the gas inlet structure, and the output end is connected to the gas inlet end of the pressure selection unit.

[0017] Further, the device further comprises a particulate matter sensor arranged on the inner wall of the output end pipeline of the air filter; wherein,

[0018] The output end of the particulate matter sensor is connected to the input end of the controller;

[0019] The controller is also used to determine whether the gas quality entering the pressure selection unit meets the set requirements according to the particulate matter value collected by the particulate matter sensor, and issue an alarm to clean or replace the filter element of the air filter when the set requirements are not met.

[0020] Further, the controller further comprises:

[0021] a data acquisition unit, configured to acquire the temperature of the gas entering the pressure selection unit, and the gas pressure, the power supply current, the rotation speed, and the output gas temperature of the gas at the inlet and outlet of the hydrogen circulation pump in the selected channel, and send the data to the data processing unit;

[0022] the data processing unit, configured to control the pressure selection unit to output the gas with the set pressure according to the pressure test instruction input by the user, and select the corresponding channel of the multi-channel test unit, control the hydrogen circulation pump in the selected channel to start the durability test with the set power, send the real-time control instruction to the regulating device according to the gas pressure at the inlet and outlet of the hydrogen circulation pump in the selected channel, so as to ensure that the gas entering the hydrogen circulation pump is stable and the gas pressure discharged from the hydrogen circulation pump reaches the preset value, and acquire the test data of whether all the hydrogen circulation pumps are stuck, and then obtain the test result of whether the durability of the hydrogen circulation pump is qualified according to the test data in combination with the temperature of the gas entering the pressure selection unit, the temperature of the gas output by the hydrogen circulation pump in the selected channel, the power supply current, and the rotation speed.

[0023] Further, the data acquisition unit further comprises a pressure sensor, a temperature sensor, a current sensor, and a speed sensor; wherein,

[0024] the pressure sensor is arranged on the inner wall of the pipeline at the inlet and outlet of the hydrogen circulation pump in each channel of the multi-channel test unit, and the output end of all the pressure sensors is connected with the input end of the data processing unit, for acquiring the gas pressure at the inlet and outlet of the hydrogen circulation pump in the selected channel;

[0025] the temperature sensor is arranged on the inner wall of the gas transmission pipeline at the input end of the pressure selection unit, and the inner wall of the pipeline at the outlet of the hydrogen circulation pump in each channel of the multi-channel test unit, for acquiring the temperature of the gas entering the pressure selection unit and the temperature of the gas output by the hydrogen circulation pump in the selected channel;

[0026] the current sensor is arranged at the power supply end of the hydrogen circulation pump in each channel of the multi-channel test unit, for acquiring the power supply current of the hydrogen circulation pump in the channel;

[0027] the speed sensor is arranged on the rotor of the motor of the hydrogen circulation pump in each channel of the multi-channel test unit, for acquiring the rotation speed of the hydrogen circulation pump.

[0028] Further, the data processing unit further executes the following program:

[0029] According to the pressure test instruction input by the user, the pressure selection unit outputs the set pressure of the gas, and the corresponding channel of the multi-channel test unit is selected, and the hydrogen circulation pump to be tested on the selected channel is started to set the power operation;

[0030] The gas pressure of the inlet end of the hydrogen circulation pump to be tested on the selected channel is obtained within a preset period of time, and whether the gas entering the hydrogen circulation pump to be tested is stable is judged according to the variation amplitude of the gas pressure. If not, a control instruction is sent to the control device of the channel until the gas entering the hydrogen circulation pump to be tested is stable, and the next step is executed.

[0031] After the gas entering the hydrogen circulation pump to be tested is stable, the gas pressure of the outlet end of the hydrogen circulation pump to be tested is obtained, and whether it reaches the preset value is judged. If not, a real-time control instruction is sent to the control device until the gas pressure discharged from the hydrogen circulation pump to be tested reaches the preset value, and the next step is executed.

[0032] The hydrogen circulation pump to be tested on the selected channel is controlled to run at the limit power for a preset time or simulate the real machine running state to cycle the speed and power for a preset time. The test data of whether the hydrogen circulation pump to be tested on the selected channel is stuck, and the gas temperature, power supply current and speed of the hydrogen circulation pump to be tested on the selected channel are obtained.

[0033] According to the test data combined with the gas temperature, power supply current and speed of the hydrogen circulation pump to be tested on the selected channel, the test result of whether the durability of the hydrogen circulation pump to be tested is qualified is obtained. If stuck occurs, or the power supply current and speed exceed 25% of the predetermined value for more than 1 min, or the gas temperature exceeds 100% of the normal working temperature of the circulation pump, it is determined that the durability of the hydrogen circulation pump to be tested is unqualified, otherwise, it is determined that the durability of the hydrogen circulation pump to be tested is qualified.

[0034] Further, the data processing unit further executes the following program:

[0035] After the hydrogen circulation pump durability test device is placed in the high temperature environment bin, the temperature of the gas entering the pressure selection unit is monitored.

[0036] According to the temperature of the gas entering the pressure selection unit, a temperature adjustment instruction is sent to the temperature control device in the high temperature environment bin until the temperature of the gas entering the pressure selection unit reaches the set value.

[0037] Further, the pressure selection unit further comprises two branches of high pressure selection branch and normal pressure selection branch in parallel; wherein,

[0038] The first shut-off valve and the pressure booster are connected in series on the high pressure selection branch.

[0039] The second shutoff valve is arranged on the normal pressure selection branch.

[0040] Compared with the prior art, the present application can achieve at least one of the following beneficial effects:

[0041] 1. The hydrogen circulation pump is verified by the device, which greatly accelerates the verification time, and saves the development cost since the fuel cell engine is not required to be verified and mounted on the vehicle for verification.

[0042] 2. The device provides multiple control modes for determining the test of the hydrogen circulation pump to be tested, which is beneficial to support the design and development work through the test.

[0043] The summary is provided to introduce the selection of concepts in a simplified form, which will be further described in the detailed description below. The summary is not intended to identify key or essential features of the disclosure, nor is it intended to limit the scope of the disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0044] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, in which exemplary embodiments of the present disclosure are shown.

[0045] Figure 1 A hydrogen circulation pump durability test device for a fuel cell according to Embodiment 1 is shown in the schematic diagram of the composition;

[0046] Figure 2 A hydrogen circulation pump durability test device for a fuel cell according to Embodiment 2 is shown in the schematic diagram of the composition;

[0047] Figure 3 A hydrogen circulation pump durability test device for a fuel cell according to Embodiment 2 is shown in the schematic diagram of the circuit connection.

[0048] REFERENCE NUMERALS:

[0049] 1 - controller; 2 - air inlet structure; 3 - air filter; 4 - particulate matter sensor; 51 - first temperature sensor; 52 - second temperature sensor, 53 - third temperature sensor; 61 - first shutoff valve; 62 - second shutoff valve; 63 - third shutoff valve; 64 - fourth shutoff valve; 71 - first flow stabilizer; 72 - second flow stabilizer; 81 - first pressure sensor; 82 - second pressure sensor; 83 - third pressure sensor; 84 - fourth pressure sensor; 91 - hydrogen circulation pump to be tested one; 92 - hydrogen circulation pump to be tested two; 101 - first throttle valve; 102 - second throttle valve; 11 - supercharger; 12 - air outlet structure. DETAILED DESCRIPTION

[0050] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0051] The term "comprising" and variations thereof as used herein are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Unless otherwise specified, the term "or" as used herein is intended to mean "and / or". The term "based on" means "based, at least in part, on". The terms "one example embodiment" and "an example embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "a first", "a second", etc. can refer to different or the same objects. Other explicit or implicit definitions can also be included below.

[0052] A fuel cell stack is an electrochemical reaction device in which hydrogen and oxygen react in two half-electrodes respectively to generate water, converting chemical energy into electrical energy, accompanied by conversion into heat energy with efficiency loss.

[0053] Embodiment 1

[0054] One embodiment of the present invention discloses a durability testing device for hydrogen circulation pumps, as shown in Figure 1 The device includes a controller and, in sequence, an air inlet structure, a pressure selection unit, a multi-channel testing unit, and an air outlet structure.

[0055] Each channel in the multi-channel testing unit is independent and parallel to each other, and each channel is provided with a hydrogen circulation pump to be tested (the hydrogen circulation pump to be tested in the channel can be tested for durability individually) and a control device for controlling the flow and pressure of the input gas of the hydrogen circulation pump to be tested.

[0056] The air inlet structure is used to input gas, such as hydrogen or a substitute gas for hydrogen.

[0057] The pressure selection unit is used to output gas with a set pressure according to the control of the controller.

[0058] The air outlet structure is used to output gas.

[0059] The controller is configured to control the pressure selection unit to output the set pressure of the gas according to a pressure test instruction input by a user, to select a corresponding channel of the multi-channel test unit, to control a to-be-tested hydrogen circulation pump on the selected channel to set a power for a durability test, and to obtain test data of whether all to-be-tested hydrogen circulation pumps are stuck, and to obtain a test result of whether the durability of the to-be-tested hydrogen circulation pump is qualified.

[0060] Compared with the prior art, the embodiment provides a durability test device for a hydrogen circulation pump to verify the durability of the to-be-tested hydrogen circulation pump, and provides important support for durability test of the hydrogen circulation pump. The to-be-tested hydrogen circulation pump is tested by the device, and the verification time is greatly saved. Since the fuel cell engine is not required to be tested as a whole and is not required to be tested in a vehicle, the development cost is greatly saved. The durability of the to-be-tested hydrogen circulation pump is determined by using multiple set pressures, and the design and development work is supported by the test.

[0061] Embodiment 2

[0062] The device is improved on the basis of the device in Embodiment 1, and the shapes of the air inlet structure and the air outlet structure are both horn-shaped. The inner diameter of the air inlet end of the air inlet structure is greater than the inner diameter of the air outlet end, and the air inlet end is arranged upward. The inner diameter of the air inlet end of the air outlet end of the air outlet structure is less than the inner diameter of the air outlet end, and the air outlet end is arranged toward one side of the test device.

[0063] Preferably, the regulating device on each channel of the multi-channel test unit comprises a shut-off valve and a flow stabilizer connected in sequence. Figures 2-3 As shown in the figure. The shut-off valve and the flow stabilizer are connected in sequence and connected with the air inlet end of the to-be-tested hydrogen circulation pump on the channel.

[0064] The output end of the controller is connected with the control end of all shut-off valves and flow stabilizers, and the shut-off valve and the flow stabilizer on each channel are independently controlled to independently test the to-be-tested hydrogen circulation pump on different channels.

[0065] Preferably, the regulating device on each channel of the multi-channel test unit further comprises a throttle valve. The input end of the throttle valve is connected with the air outlet end of the to-be-tested hydrogen circulation pump on the channel, the output end of the throttle valve is connected with the air inlet of the air outlet structure, and the control end of the throttle valve is connected with the output end of the controller.

[0066] The controller is further configured to control the opening degree of the throttle valve on the selected channel to adjust the pressure rise of the gas passing through the to-be-tested hydrogen circulation pump on the channel.

[0067] Preferably, the device further comprises an air filter for particulate matter control of the gas discharged from the air intake structure. The input end of the air filter is connected with the gas discharge end of the air intake structure, and the output end is connected with the gas intake end of the pressure selection unit.

[0068] Preferably, the device further comprises a particulate matter sensor arranged on the inner wall of the output pipeline of the air filter. The output end of the particulate matter sensor is connected with the input end of the controller.

[0069] The controller is further used to determine whether the quality of the gas entering the pressure selection unit meets the set requirements according to the particulate matter value collected by the particulate matter sensor, and to issue a warning for cleaning or replacing the filter element of the air filter when the set requirements are not met.

[0070] Preferably, the controller comprises a data acquisition unit and a data processing unit connected in sequence.

[0071] The data acquisition unit is used to collect the temperature of the gas entering the pressure selection unit, the gas pressure, the power supply current, and the rotation speed of the hydrogen circulation pump on the selected channel, and the temperature of the output gas, and send them to the data processing unit.

[0072] The data processing unit is used to control the pressure selection unit to output gas with a set pressure according to the pressure test instruction input by the user, select the corresponding channel of the multi-channel test unit, control the hydrogen circulation pump on the selected channel to start the durability test at a set power, issue real-time control instructions to the control equipment according to the gas pressure at the inlet and outlet of the hydrogen circulation pump on the selected channel, to ensure the stability of the gas entering the hydrogen circulation pump and the gas pressure discharged from the hydrogen circulation pump reaching the preset value, and obtain test data of whether all the hydrogen circulation pumps are stuck, and then derive the test result of whether the durability of the hydrogen circulation pump is qualified according to the test data in combination with the temperature of the gas entering the pressure selection unit, the temperature of the output gas of the hydrogen circulation pump on the selected channel, and the power supply current and rotation speed.

[0073] Preferably, the data acquisition unit further comprises a pressure sensor, a temperature sensor, a current sensor, and a speed sensor.

[0074] The pressure sensor is arranged on the inner wall of the pipeline at the inlet and outlet of the hydrogen circulation pump on each channel of the multi-channel test unit. The output ends of all the pressure sensors are connected with the input end of the data processing unit, for collecting the gas pressure at the inlet and outlet of the hydrogen circulation pump on the selected channel.

[0075] Temperature sensors are arranged on the inner wall of the gas transmission pipeline at the input end of the pressure selection unit and on the inner wall of the gas outlet pipeline of the hydrogen circulation pump in each channel of the multi-channel test unit, for collecting the temperature of the gas entering the pressure selection unit and the temperature of the gas output by the hydrogen circulation pump in the selected channel.

[0076] Current sensors are arranged at the power supply end of the hydrogen circulation pump in each channel of the multi-channel test unit, for collecting the power supply current of the hydrogen circulation pump in the channel.

[0077] Speed sensors are arranged on the rotor of the motor in the hydrogen circulation pump in each channel of the multi-channel test unit, for collecting the rotating speed of the hydrogen circulation pump.

[0078] Preferably, device inspection should be performed before the data processing unit works, to determine the working state of each sensor and component, whether there is a fault, and whether there is a gas leakage phenomenon at each gas connection port. After 5 minutes of trial operation, the state of the air filter is checked.

[0079] After the above inspection is completed, the data processing unit further executes the following procedures:

[0080] S1. The particulate matter value collected by the particulate matter sensor is obtained, to determine whether the gas quality entering the pressure selection unit meets the set requirement, and to issue a warning for cleaning or replacing the air filter element when the set requirement is not met (i.e. the particulate matter value exceeds the standard value, and the set requirement is met when the particulate matter value is less than the standard value).

[0081] S2. After the gas quality meets the set requirement, the pressure selection unit is controlled to output gas at the set pressure (high pressure or normal pressure) according to the pressure test instruction input by the user, and the corresponding channel of the multi-channel test unit is selected to control the hydrogen circulation pump in the selected channel to start and run at the set power.

[0082] S3. The gas pressure (high pressure or normal pressure) at the gas inlet end of the hydrogen circulation pump in the selected channel is obtained within a preset period of time, to determine whether the gas entering the hydrogen circulation pump is stable according to the variation amplitude of the gas pressure; if not stable (i.e. the amplitude variation exceeds the set range), a control instruction is issued to the control device of the channel until the gas entering the hydrogen circulation pump is stable, and the next step is executed.

[0083] S4. After the gas entering the hydrogen circulation pump is stable, the gas pressure at the gas outlet end of the hydrogen circulation pump is obtained, to determine whether it reaches the preset value; if not, a real-time control instruction is issued to the control device until the gas pressure discharged from the hydrogen circulation pump reaches the preset value, the control of the control device is completed, and the next step is executed.

[0084] S5. Control the to-be-tested hydrogen circulation pump on the gating channel to run at the limit power for a preset time or simulate the real machine running state to change the speed and power cycle for a preset time (for example, run for 10000h or accelerate verification for 5000h), and obtain the test data of whether the to-be-tested hydrogen circulation pump on the gating channel is stuck and the gas temperature, power supply current and speed of the to-be-tested hydrogen circulation pump output on the gating channel;

[0085] S6. According to the test data and the gas temperature, power supply current and speed of the to-be-tested hydrogen circulation pump output on the gating channel, determine whether the durability of the to-be-tested hydrogen circulation pump is qualified; wherein if stuck occurs, or the power supply current and speed exceed 25% of the predetermined value for more than 1min within the preset time, or the gas temperature exceeds 100% of the normal working temperature of the circulation pump, it is determined that the durability of the to-be-tested hydrogen circulation pump is unqualified, otherwise, it is determined that the durability of the to-be-tested hydrogen circulation pump is qualified.

[0086] Preferably, the pressure selection unit further comprises two branches of a high-pressure selection branch and an atmospheric pressure selection branch in parallel. Wherein, the high-pressure selection branch is provided with a first shut-off valve and a booster in series; the atmospheric pressure selection branch is provided with a second shut-off valve.

[0087] Preferably, the data processing unit further executes the following program:

[0088] S01. After placing the hydrogen circulation pump durability test device in the high-temperature environment bin, monitor the temperature of the gas entering the pressure selection unit;

[0089] S02. According to the temperature of the gas entering the pressure selection unit, issue a temperature adjustment instruction to the temperature control equipment in the high-temperature environment bin until the temperature of the gas entering the pressure selection unit reaches the set value.

[0090] Preferably, the data processing unit further executes the following program:

[0091] S7. (at the same time as step S5 in the test process) Monitor the circulation pump lubricating oil quality and oil seal test data;

[0092] S8. If the lubricating oil is emulsified or the oil seal is obviously leaked before the preset time, it is determined that the durability of the to-be-tested hydrogen circulation pump is unqualified.

[0093] For Figure 3The structure shown, in operation, air enters through the air inlet structure 2, is filtered by the air filter 3, and the filtered gas is checked for air quality when passing through the particulate matter sensor 4, and feedback is given to the controller 1, if the gas quality does not meet the requirements, the air filter 3 needs to be cleaned or replaced. Next, the gas passes through the first temperature sensor 51 to measure the temperature, and then enters the pressure selection channel of the pressure selection unit, if normal pressure test is used, the second stop valve 62 is opened, the gas flow directly enters each channel of the multi-channel test unit, if high pressure test is used, the first stop valve 61 is opened, the supercharger 11 starts to work, so that the pressure before entering each channel of the multi-channel test unit reaches the specified value. The two paths of the multi-channel test unit are respectively controlled by the third stop valve 63 and the fourth stop valve 64, and one channel or both channels can be selected for use according to the needs. First and second flow stabilizers 71, 71 are respectively arranged on the two channels to stabilize the gas entering the hydrogen circulation pumps 91, 92 to be tested. Then the gas pressure before entering the hydrogen circulation pumps 91, 92 to be tested is measured by the first and second pressure sensors 81, 82, and then enters the hydrogen circulation pump one 91 and the hydrogen circulation pump two 92 respectively, and then passes through the first and second throttling valves 101, 102 respectively to control the pressure rise of the two channels (different pressure rises are selected according to different hydrogen circulation pumps to be tested). After the throttling valves, the second and third temperature sensors 52, 53 measure the gas pressure after the pressure rise of the two paths, and then the third and fourth pressure sensors 83, 84 measure the gas pressure after the pressure rise, and finally the gas is discharged through the exhaust port of the air outlet structure 12.

[0094] Compared with example 1, the device provided in the embodiment has the following beneficial effects:

[0095] 1. The device verifies the hydrogen circulation pump, greatly speeding up the verification time, and saves development costs as the fuel cell engine whole machine does not need to be verified and real vehicle verification.

[0096] 2. The device provides multiple control modes for testing the hydrogen circulation pump to be tested, which is conducive to supporting design and development work through experiments.

[0097] The above has described various embodiments of the present disclosure, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles, practical applications, or improvements of the prior art of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A hydrogen circulation pump durability test device for a fuel cell, characterized by, The controller is used for controlling the pressure selection unit to output gas with a set pressure according to a pressure test instruction input by a user, and for selecting a corresponding channel of the multi-channel test unit, controlling the tested hydrogen circulation pump on the selected channel to perform durability test at a set power, and obtaining test data of whether all the tested hydrogen circulation pumps are stuck, and further obtaining a test result of whether the durability of the tested hydrogen circulation pump is qualified. The control device on each channel of the multi-channel test unit further comprises a throttle valve; wherein The input end of the throttle valve is connected with the gas outlet end of the tested hydrogen circulation pump on the channel, the output end is connected with the gas inlet of the gas outlet structure, and the control end is connected with the output end of the controller. The controller is further used for controlling the opening of the throttle valve on the selected channel to adjust the pressure rise of the gas passing through the tested hydrogen circulation pump on the channel. The controller further comprises: The data acquisition unit is used for collecting the temperature of the gas entering the pressure selection unit, the gas pressure, power supply current, and rotating speed of the tested hydrogen circulation pump on the selected channel, and the temperature of the output gas, and sending them to the data processing unit. The data processing unit is used for controlling the pressure selection unit to output gas with a set pressure according to a pressure test instruction input by a user, and for selecting a corresponding channel of the multi-channel test unit, controlling the tested hydrogen circulation pump on the selected channel to perform durability test at a set power, and obtaining test data of whether all the tested hydrogen circulation pumps are stuck, and further according to the test data, the temperature of the gas entering the pressure selection unit, the temperature of the output gas of the tested hydrogen circulation pump on the selected channel, and the power supply current and rotating speed, deriving a test result of whether the durability of the tested hydrogen circulation pump is qualified. The data acquisition unit further comprises a pressure sensor, a temperature sensor, a current sensor, and a speed sensor; wherein ​ ​ ​ ​ ​ The pressure sensor is arranged on the inner wall of the gas inlet end and the gas outlet end pipeline of the hydrogen circulation pump in each channel of the multi-channel test unit respectively; and the output ends of all the pressure sensors are connected with the input ends of the data processing unit, for collecting the gas pressure of the gas inlet end and the gas outlet end of the hydrogen circulation pump in the selected channel. The temperature sensor is arranged on the inner wall of the gas transmission pipeline of the input end of the pressure selection unit, and the inner wall of the gas outlet end pipeline of the hydrogen circulation pump in each channel of the multi-channel test unit, for collecting the temperature of the gas entering the pressure selection unit and the temperature of the gas output by the hydrogen circulation pump in the selected channel. The current sensor is arranged on the power supply end of the hydrogen circulation pump in each channel of the multi-channel test unit, for collecting the power supply current of the hydrogen circulation pump in the channel. The speed sensor is arranged on the rotor of the motor of the hydrogen circulation pump in each channel of the multi-channel test unit, for collecting the rotating speed of the hydrogen circulation pump. The data processing unit further executes the following programs: According to the pressure test instruction input by the user, the pressure selection unit outputs the gas with the set pressure, and the corresponding channel of the multi-channel test unit is selected, and the hydrogen circulation pump in the selected channel is started to run with the set power. The gas pressure of the gas inlet end of the hydrogen circulation pump in the selected channel is collected in a preset period, and whether the gas entering the hydrogen circulation pump is stable is judged according to the variation amplitude of the gas pressure; if not, a control instruction is sent to the control device of the channel until the gas entering the hydrogen circulation pump is stable, and the next step is executed. After the gas entering the hydrogen circulation pump is stable, the gas pressure of the gas outlet end of the hydrogen circulation pump is collected, and whether the gas pressure reaches the preset value is judged; if not, a real-time control instruction is sent to the control device until the gas pressure of the gas output by the hydrogen circulation pump reaches the preset value, and the next step is executed. The hydrogen circulation pump in the selected channel is controlled to run with the limit power for a preset time or to run in the cycle of simulating the real machine running state with the variable rotating speed and variable power for a preset time, and the test data of whether the hydrogen circulation pump in the selected channel is stuck, the gas temperature, the power supply current and the rotating speed of the hydrogen circulation pump in the selected channel are collected. According to the test data and the gas temperature, the power supply current and the rotating speed of the hydrogen circulation pump in the selected channel, whether the durability of the hydrogen circulation pump is qualified is judged; if the hydrogen circulation pump is stuck, or the power supply current and the rotating speed exceed 25% of the predetermined value and last for more than 1 min, or the gas temperature exceeds 100% of the normal working temperature of the circulation pump, it is judged that the durability of the hydrogen circulation pump is unqualified, otherwise, it is judged that the durability of the hydrogen circulation pump is qualified.

2. The hydrogen circulation pump durability test device for a fuel cell according to Claim 1, characterized by The air filter for controlling the particulate matter of the gas discharged from the gas inlet structure is further included; wherein, The input end of the air filter is connected with the gas outlet end of the gas inlet structure, and the output end is connected with the gas inlet end of the pressure selection unit.

3. The hydrogen circulation pump durability test device for a fuel cell according to Claim 2, characterized by The particulate matter sensor arranged on the inner wall of the output end pipeline of the air filter is further included; wherein, An output end of the particulate matter sensor is connected with an input end of the controller; The controller is further configured to determine whether the quality of the gas entering the pressure selection unit meets a set requirement according to the particulate matter value collected by the particulate matter sensor, and to issue a warning for cleaning or replacing the air filter element when the set requirement is not met.

4. The hydrogen circulation pump durability test device for fuel cells according to Claim 1, characterized by The data processing unit further executes the following program: After the hydrogen circulation pump durability test device is placed in the high-temperature environment chamber, the temperature of the gas entering the pressure selection unit is monitored; A temperature adjustment instruction is issued to the temperature control equipment in the high-temperature environment chamber according to the temperature of the gas entering the pressure selection unit until the temperature of the gas entering the pressure selection unit reaches a set value.

5. The durability test device for a hydrogen circulation pump of a fuel cell according to any one of claims 1 to 4, characterized by The pressure selection unit further comprises two branches of a high-pressure selection branch and an atmospheric pressure selection branch connected in parallel; wherein, A first shut-off valve and a pressure booster are connected in series on the high-pressure selection branch; A second shut-off valve is arranged on the atmospheric pressure selection branch.

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