Automatic detection device for air tightness of electric pile

Abstract

The utility model relates to the technical field of battery detection, and discloses an electric pile air tightness automatic detection device, which comprises a compressed air source, a valve terminal, a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor, a first test channel, a second test channel, a third test channel and a fourth test channel, an air outlet of the compressed air source is connected with one end of the valve terminal through a pipeline, the other end of the valve terminal is provided with four outlets, the four outlets are connected with the first testing channel, the second testing channel, the third testing channel and the fourth testing channel respectively, the first testing channel is provided with a first pressure sensor, and the second testing channel is provided with a second pressure sensor. A second pressure sensor is mounted on the second test channel, a third pressure sensor is mounted on the third test channel, and a fourth pressure sensor is mounted on the fourth test channel; according to the utility model, the problems of low efficiency and poor accuracy of the existing stack airtightness detection device are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to an automatic gas tightness detection device for a battery stack. Background Art

[0002] With the rapid development of new energy technologies, battery systems are being used more and more widely. Liquid flow battery systems are one of the common battery systems, and the fuel cell stack is the core part of the liquid flow battery system. Its air tightness is crucial to the performance of the liquid flow battery. Therefore, it is necessary to test the gas tightness of the fuel cell stack. At present, when testing the gas tightness of the fuel cell stack, most of them use manual testing methods, which require manual handheld testing devices to test the gas tightness of the fuel cell stack. Manual testing is inefficient, and the test results need to be compared and observed through the pressure gauge display value, which makes it difficult to ensure accuracy. At the same time, due to the complex internal structure of the fuel cell stack, the manual testing method also has safety risks. It can be seen that the existing fuel cell stack air tightness testing devices have the problems of low efficiency and poor accuracy. Utility Model Content

[0003] The utility model provides an automatic gas tightness detection device for a fuel cell stack, so as to solve the problems of low efficiency and poor accuracy of the existing gas tightness detection device for a fuel cell stack.

[0004] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] The utility model provides an automatic gas tightness detection device for a fuel cell stack, comprising: a compressed air source, a valve island, a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor, a first test channel, a second test channel, a third test channel and a fourth test channel;

[0006] The outlet of the compressed air source is connected to one end of the valve island through a pipeline. The other end of the valve island is provided with four outlets, which are respectively connected to the first test channel, the second test channel, the third test channel and the fourth test channel. The first test channel is installed with a first pressure sensor, the second test channel is installed with a second pressure sensor, the third test channel is installed with a third pressure sensor, and the fourth test channel is installed with a fourth pressure sensor.

[0007] Optionally, the device further comprises: a throttle valve and a pressure regulating valve;

[0008] The throttle valve is installed on the side of the pipeline connecting the compressed air source and the valve island close to the compressed air source, and the pressure regulating valve is installed on the side of the pipeline connecting the compressed air source and the valve island close to the valve island.

[0009] Optionally, the valve island includes: a four-position manifold, a first solenoid valve, a second solenoid valve, a third solenoid valve and a fourth solenoid valve, a first induction check valve, a second induction check valve, a third induction check valve and a fourth induction check valve;

[0010] The inlet at one end of the four-position manifold is connected to the outlet of the compressed air source through a pipeline, and four outlets are opened at the other end of the four-position manifold, and the four outlets are connected to the inlets of the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve in sequence, the outlet of the first solenoid valve is connected to the inlet of the first induced check valve, the outlet of the second solenoid valve is connected to the inlet of the second induced check valve, the outlet of the third solenoid valve is connected to the inlet of the third induced check valve, the outlet of the fourth solenoid valve is connected to the inlet of the fourth induced check valve, the outlet of the first induced check valve is connected to the first test channel, the outlet of the second induced check valve is connected to the second test channel, the outlet of the third induced check valve is connected to the third test channel, and the outlet of the fourth induced check valve is connected to the fourth test channel.

[0011] Optionally, the valve island further includes: a main air intake pipe, a fifth solenoid valve, a sixth solenoid valve, a seventh solenoid valve, an eighth solenoid valve, a first electric ball valve, a second electric ball valve, a third electric ball valve and a fourth electric ball valve;

[0012] The inlet at one end of the main air intake pipe is connected to the outlet of the compressed air source through the pipeline, and four outlets are opened at the other end of the main air intake pipe, and the four outlets are connected to the inlets of the fifth solenoid valve, the sixth solenoid valve, the seventh solenoid valve and the eighth solenoid valve in sequence, the outlet of the fifth solenoid valve is connected to the inlet of the first electric ball valve, the outlet of the sixth solenoid valve is connected to the inlet of the second electric ball valve, the outlet of the seventh solenoid valve is connected to the inlet of the third electric ball valve, the outlet of the eighth solenoid valve is connected to the inlet of the fourth electric ball valve, the outlet of the first electric ball valve is connected to the first test channel, the outlet of the second electric ball valve is connected to the second test channel, the outlet of the third electric ball valve is connected to the third test channel, and the outlet of the fourth electric ball valve is connected to the fourth test channel.

[0013] Optionally, the battery stack includes a first battery stack chamber, a second battery stack chamber, a third battery stack chamber and a fourth battery stack chamber;

[0014] One end of the first test channel away from the valve island is connected to the first fuel cell stack chamber, one end of the second test channel away from the valve island is connected to the second fuel cell stack chamber, one end of the third test channel away from the valve island is connected to the third fuel cell stack chamber, and one end of the fourth test channel away from the valve island is connected to the fourth fuel cell stack chamber.

[0015] Optionally, the device further includes: a controller, an audible and visual alarm;

[0016] The controller is respectively connected to the first pressure sensor, the second pressure sensor, the third pressure sensor and the fourth pressure sensor by signal;

[0017] The sound and light alarm is connected with the controller signal.

[0018] Beneficial effects:

[0019] The automatic gas tightness detection device for the fuel cell stack provided by the utility model can realize automatic detection compared with the traditional manual detection method, thereby greatly improving the detection efficiency. The device can monitor the pressure change inside the fuel cell stack in real time through precise detection equipment such as pressure sensors, accurately judge the gas tightness of the fuel cell stack, and improve the detection accuracy. Automatic detection avoids the safety risks of manual operation and ensures the safety of the detection process. The device can accurately and quickly detect the gas tightness of the fuel cell stack, providing an effective basis for the production and maintenance of the fuel cell stack, and helping to improve the performance and reliability of the fuel cell stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a device for automatically detecting gas tightness of a fuel cell stack according to a first embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the automatic gas tightness detection device of the battery stack according to the second embodiment of the present utility model;

[0022] In the figure, 100, the first battery stack chamber; 110, the second battery stack chamber; 120, the third battery stack chamber; 130, the fourth battery stack chamber; 200, the first test channel; 210, the second test channel; 220, the third test channel; 230, the fourth test channel; 300, the first pressure sensor; 310, the second pressure sensor; 320, the third pressure sensor; 330, the fourth pressure sensor; 400, the first induction check valve; 410, the second induction check valve; 420, the third induction check valve; 430, the fourth induction Check valve; 500, first solenoid valve; 510, second solenoid valve; 520, third solenoid valve; 530, fourth solenoid valve; 600, four-position manifold; 700, pressure regulating valve; 800, throttle valve; 900, compressed air source; 1000, first electric ball valve; 1010, second electric ball valve; 1020, third electric ball valve; 1030, fourth electric ball valve; 1100, fifth solenoid valve; 1110, sixth solenoid valve; 1120, seventh solenoid valve; 1130, eighth solenoid valve; 1200, main air intake pipe. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate quantity restrictions, but indicate the existence of at least one. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0025] Example 1

[0026] See also Figure 1 The embodiment of the present application provides an automatic gas tightness detection device for a fuel cell stack, comprising: a compressed air source 900, a valve island, a first pressure sensor 300, a second pressure sensor 310, a third pressure sensor 320, a fourth pressure sensor 330, a first test channel 200, a second test channel 210, a third test channel 220 and a fourth test channel 230;

[0027] The air outlet of the compressed air source 900 is connected to one end of the valve island through a pipeline, and four outlets are provided at the other end of the valve island, which are respectively connected to the first test channel 200, the second test channel 210, the third test channel 220 and the fourth test channel 230. The first test channel 200 is equipped with a first pressure sensor 300, the second test channel 210 is equipped with a second pressure sensor 310, the third test channel 220 is equipped with a third pressure sensor 320, and the fourth test channel 230 is equipped with a fourth pressure sensor 330.

[0028] Optionally, the device further includes: a throttle valve 800 and a pressure regulating valve 700;

[0029] The throttle valve 800 is installed on the side of the pipeline connecting the compressed air source 900 and the valve island close to the compressed air source 900, and the pressure regulating valve 700 is installed on the side of the pipeline connecting the compressed air source 900 and the valve island close to the valve island.

[0030] Optionally, the valve island includes: a four-position manifold 600, a first solenoid valve 500, a second solenoid valve 510, a third solenoid valve 520 and a fourth solenoid valve 530, a first induction check valve 400, a second induction check valve 410, a third induction check valve 420 and a fourth induction check valve 430;

[0031] The inlet at one end of the four-position manifold 600 is connected to the outlet of the compressed air source 900 through a pipeline, and four outlets are opened at the other end of the four-position manifold 600, and the four outlets are connected to the inlets of the first solenoid valve 500, the second solenoid valve 510, the third solenoid valve 520 and the fourth solenoid valve 530 in sequence. The outlet of the first solenoid valve 500 is connected to the inlet of the first induced check valve 400, the outlet of the second solenoid valve 510 is connected to the inlet of the second induced check valve 410, the outlet of the third solenoid valve 520 is connected to the inlet of the third induced check valve 420, the outlet of the fourth solenoid valve 530 is connected to the inlet of the fourth induced check valve 430, the outlet of the first induced check valve 400 is connected to the first test channel 200, the outlet of the second induced check valve 410 is connected to the second test channel 210, the outlet of the third induced check valve 420 is connected to the third test channel 220, and the outlet of the fourth induced check valve 430 is connected to the fourth test channel 230.

[0032] Optionally, the battery stack includes a first battery stack chamber 100, a second battery stack chamber 110, a third battery stack chamber 120 and a fourth battery stack chamber 130;

[0033] One end of the first test channel 200 away from the valve island is connected to the first fuel cell stack chamber 100, one end of the second test channel 210 away from the valve island is connected to the second fuel cell stack chamber 110, one end of the third test channel 220 away from the valve island is connected to the third fuel cell stack chamber 120, and one end of the fourth test channel 230 away from the valve island is connected to the fourth fuel cell stack chamber 130.

[0034] Optionally, the device further includes: a controller, an audible and visual alarm;

[0035] The controller is respectively connected to the first pressure sensor 300, the second pressure sensor 310, the third pressure sensor 320 and the fourth pressure sensor 330 by signals;

[0036] The sound and light alarm is connected with the controller signal.

[0037] The device used for the gas tightness test of the above-mentioned fuel cell stack, the gas leakage test method includes:

[0038] Step A1: The first solenoid valve 500 coil A and the second solenoid valve 510 coil A are simultaneously attracted to fill the first stack chamber 100 and the second stack chamber 110 with compressed air respectively;

[0039] Step A2: The first pressure sensor 300 and the second pressure sensor 310 respectively monitor the air pressure of the first stack chamber 100 and the second stack chamber 110 in real time. When the air pressure of the first stack chamber 100 and the second stack chamber 110 reaches the set value, the coils A of the first solenoid valve 500 and the second solenoid valve 510 are closed respectively, and the compressed air is sealed in the first stack chamber 100 and the second stack chamber 110 respectively to maintain the air pressure of the first stack chamber 100 and the second stack chamber 110;

[0040] Step A3: The controller compares the real-time pressure values ​​of the first stack chamber 100 and the second stack chamber 110 with the set alarm pressure values. When the real-time pressure of the first stack chamber 100 or the second stack chamber 110 is less than the set alarm pressure, the sound and light alarm sounds an alarm, prompting the operator that there is a gas leak in the first stack chamber 100 or the second stack chamber 110, and the stack gas leakage test has failed. If after 30 minutes, the real-time pressure of the first stack chamber 100 and the second stack chamber 110 is still greater than the set alarm pressure, no alarm will sound, and the stack gas leakage test has passed;

[0041] Step A4: After completing the stack leakage test, close the first solenoid valve 500 coil A and the second solenoid valve 510 coil A at the same time, open the first solenoid valve 500 coil B and the second solenoid valve 510 coil B, and exhaust the first stack chamber 100 and the second stack chamber 110. When the air in the first stack chamber 100 and the second stack chamber 110 is exhausted, close the first solenoid valve 500 coil B and the second solenoid valve 510 coil B, and end the leakage test of the first stack chamber 100 and the second stack chamber 110;

[0042] Step A5: According to steps A1-A4, the leakage test of the third stack chamber 120 and the fourth stack chamber 130 is completed.

[0043] The device for testing the gas tightness of the above-mentioned fuel cell stack and the cross-flow testing method include:

[0044] Step B1: respectively setting the inflation pressure of the first stack chamber 100 and the second stack chamber 110, and the pressure values ​​set in the two chambers maintain a certain difference according to the process requirements;

[0045] Step B2: The coil A of the first solenoid valve 500 and the coil A of the second solenoid valve 510 are simultaneously attracted to fill the first stack chamber 100 and the second stack chamber 110 with compressed air respectively;

[0046] Step B3: The controller records the pressure values ​​of the first stack chamber 100 and the second stack chamber 110 when the gas filling is completed, and compares them with the real-time pressure values ​​of the first stack chamber 100 and the second stack chamber 110 respectively. When the difference between the real-time pressure of the first stack chamber 100 or the second stack chamber 110 and the pressure recorded when the gas filling is completed exceeds the difference set by the cross-gas alarm, the sound and light alarm sounds an alarm to remind the operator that cross-gas has occurred in the first stack chamber 100 or the second stack chamber 110, and the stack cross-gas test has failed. If after 30 minutes, the difference between the real-time pressure of the first stack chamber 100 and the second stack chamber 110 and the pressure recorded when the gas filling is completed is lower than the difference set by the cross-gas alarm, no alarm will occur, and the stack cross-gas test has passed;

[0047] Step B4: After completing the stack cross-flow test, close the first solenoid valve 500 coil A and the second solenoid valve 510 coil A at the same time, open the first solenoid valve 500 coil B and the second solenoid valve 510 coil B, and exhaust the first stack chamber 100 and the second stack chamber 110. When the air in the first stack chamber 100 and the second stack chamber 110 is exhausted, close the first solenoid valve 500 coil B and the second solenoid valve 510 coil B, and end the cross-flow test of the first stack chamber 100 and the second stack chamber 110;

[0048] Step B5: According to steps B1-B4, the cross-flow test of the third stack chamber 120 and the fourth stack chamber 130 is completed.

[0049] Example 2

[0050] See also Figure 2 The embodiment of the present application provides an automatic gas tightness detection device for a fuel cell stack, comprising: a compressed air source 900, a valve island, a first pressure sensor 300, a second pressure sensor 310, a third pressure sensor 320, a fourth pressure sensor 330, a first test channel 200, a second test channel 210, a third test channel 220 and a fourth test channel 230;

[0051] The air outlet of the compressed air source 900 is connected to one end of the valve island through a pipeline, and four outlets are provided at the other end of the valve island, which are respectively connected to the first test channel 200, the second test channel 210, the third test channel 220 and the fourth test channel 230. The first test channel 200 is equipped with a first pressure sensor 300, the second test channel 210 is equipped with a second pressure sensor 310, the third test channel 220 is equipped with a third pressure sensor 320, and the fourth test channel 230 is equipped with a fourth pressure sensor 330.

[0052] Optionally, the device further includes: a throttle valve 800 and a pressure regulating valve 700;

[0053] The throttle valve 800 is installed on the side of the pipeline connecting the compressed air source 900 and the valve island close to the compressed air source 900, and the pressure regulating valve 700 is installed on the side of the pipeline connecting the compressed air source 900 and the valve island close to the valve island.

[0054] Optionally, the valve island further includes: a main air intake pipe 1200, a fifth solenoid valve 1100, a sixth solenoid valve 1110, a seventh solenoid valve 1120, an eighth solenoid valve 1130, a first electric ball valve 1000, a second electric ball valve 1010, a third electric ball valve 1020 and a fourth electric ball valve 1030;

[0055] The inlet at one end of the main air intake pipe 1200 is connected to the outlet of the compressed air source 900 through a pipeline, and the other end of the main air intake pipe 1200 is provided with four outlets, and the four outlets are connected to the inlets of the fifth solenoid valve 1100, the sixth solenoid valve 1110, the seventh solenoid valve 1120 and the eighth solenoid valve 1130 in sequence, the outlet of the fifth solenoid valve 1100 is connected to the inlet of the first electric ball valve 1000, the outlet of the sixth solenoid valve 1110 is connected to the inlet of the second electric ball valve 1010, and the outlet of the sixth solenoid valve 1110 is connected to the inlet of the second electric ball valve 1010. Then, the outlet of the seventh solenoid valve 1120 is connected to the inlet of the third electric ball valve 1020, the outlet of the eighth solenoid valve 1130 is connected to the inlet of the fourth electric ball valve 1030, the outlet of the first electric ball valve 1000 is connected to the first test channel 200, the outlet of the second electric ball valve 1010 is connected to the second test channel 210, the outlet of the third electric ball valve 1020 is connected to the third test channel 220, and the outlet of the fourth electric ball valve 1030 is connected to the fourth test channel 230.

[0056] Optionally, the battery stack includes a first battery stack chamber 100, a second battery stack chamber 110, a third battery stack chamber 120 and a fourth battery stack chamber 130;

[0057] One end of the first test channel 200 away from the valve island is connected to the first fuel cell stack chamber 100, one end of the second test channel 210 away from the valve island is connected to the second fuel cell stack chamber 110, one end of the third test channel 220 away from the valve island is connected to the third fuel cell stack chamber 120, and one end of the fourth test channel 230 away from the valve island is connected to the fourth fuel cell stack chamber 130.

[0058] Optionally, the device further includes: a controller, an audible and visual alarm;

[0059] The controller is respectively connected to the first pressure sensor 300, the second pressure sensor 310, the third pressure sensor 320 and the fourth pressure sensor 330 by signals;

[0060] The sound and light alarm is connected with the controller signal.

[0061] Application Figure 2The device for testing the gas tightness of the fuel cell stack in the invention includes the following methods for testing the gas leak:

[0062] Step C1: Open the fifth solenoid valve 1100 and the sixth solenoid valve 1110 at the same time to charge the first stack chamber 100 and the second stack chamber 110 with compressed air respectively;

[0063] Step C2: The first pressure sensor 300 and the second pressure sensor 310 respectively monitor the air pressure in the first battery stack chamber 100 and the second battery stack chamber 110 in real time. When the air pressure in the first battery stack chamber 100 and the second battery stack chamber 110 reaches the set value, the fifth solenoid valve 1100 and the sixth solenoid valve 1110 are respectively closed to seal the compressed air in the first battery stack chamber 100 and the second battery stack chamber 110, respectively, to maintain the air pressure in the first battery stack chamber 100 and the second battery stack chamber 110;

[0064] Step C3: The controller compares the real-time pressure values ​​of the first stack chamber 100 and the second stack chamber 110 with the set alarm pressure value respectively. When the real-time pressure of the first stack chamber 100 or the second stack chamber 110 is less than the set alarm pressure, the sound and light alarm sounds an alarm to remind the operator that there is a gas leak in the first stack chamber 100 or the second stack chamber 110 and the stack gas leakage test is unqualified. If after 30 minutes, the real-time pressure of the first stack chamber 100 and the second stack chamber 110 is still greater than the set alarm pressure, no alarm will be sounded and the stack gas leakage test is qualified.

[0065] Step C4: After the stack leakage test is completed, the first electric ball valve 1000 and the second electric ball valve 1010 are opened to exhaust the first stack chamber 100 and the second stack chamber 110. When the air in the first stack chamber 100 and the second stack chamber 110 is exhausted, the first electric ball valve 1000 and the second electric ball valve 1010 are closed to end the leakage test of the first stack chamber 100 and the second stack chamber 110;

[0066] Step C5: According to steps C1-C4, the leakage test of the third stack chamber 120 and the fourth stack chamber 130 is completed.

[0067] The device for testing the gas tightness of the above-mentioned fuel cell stack and the cross-flow testing method include:

[0068] Step D1: respectively setting the inflation pressure of the first stack chamber 100 and the second stack chamber 110, and the pressure values ​​set in the two chambers maintain a certain difference according to the process requirements;

[0069] Step D2: Open the fifth solenoid valve 1100 and the sixth solenoid valve 1110 at the same time to charge the first stack chamber 100 and the second stack chamber 110 with compressed air respectively;

[0070] Step D3: The controller records the pressure values ​​of the first stack chamber 100 and the second stack chamber 110 when the gas filling is completed, and compares them with the real-time pressure values ​​of the first stack chamber 100 and the second stack chamber 110 respectively. When the difference between the real-time pressure of the first stack chamber 100 or the second stack chamber 110 and the recorded pressure when the gas filling is completed exceeds the difference set by the cross-gas alarm, the sound and light alarm sounds an alarm to remind the operator that cross-gas has occurred in the first stack chamber 100 or the second stack chamber 110, and the stack cross-gas test has failed. If after 30 minutes, the difference between the real-time pressure of the first stack chamber 100 and the second stack chamber 110 and the recorded pressure when the gas filling is completed is lower than the difference set by the cross-gas alarm, no alarm will occur, and the stack cross-gas test has passed.

[0071] Step D4: After completing the stack cross-flow test, close the fifth solenoid valve 1100 and the sixth solenoid valve 1110 at the same time, open the first electric ball valve 1000 and the second electric ball valve 1010, and exhaust the first stack chamber 100 and the second stack chamber 110. When the air in the first stack chamber 100 and the second stack chamber 110 is exhausted, close the first electric ball valve 1000 and the second electric ball valve 1010, and end the cross-flow test of the first stack chamber 100 and the second stack chamber 110;

[0072] Step D5: According to steps D1-D4, the cross-flow test of the third stack chamber 120 and the fourth stack chamber 130 is completed.

[0073] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A stack gas tightness automatic detection device, characterized in that: include: A compressed air source (900), a valve island, a first pressure sensor (300), a second pressure sensor (310), a third pressure sensor (320), a fourth pressure sensor (330), a first test channel (200), a second test channel (210), a third test channel (220), and a fourth test channel (230); The air outlet of the compressed air source (900) is connected to one end of the valve island via a pipeline, and the other end of the valve island is provided with four outlets, which are respectively connected to the first test channel (200), the second test channel (210), the third test channel (220) and the fourth test channel (230). The first test channel (200) is equipped with a first pressure sensor (300), the second test channel (210) is equipped with a second pressure sensor (310), the third test channel (220) is equipped with a third pressure sensor (320), and the fourth test channel (230) is equipped with a fourth pressure sensor (330).

2. The automatic gas tightness detection device of the fuel cell stack according to claim 1, characterized in that: The device further comprises: a throttle valve (800) and a pressure regulating valve (700); The throttle valve (800) is installed on a side of the pipeline connecting the compressed air source (900) and the valve island, close to the compressed air source (900), and the pressure regulating valve (700) is installed on a side of the pipeline connecting the compressed air source (900) and the valve island, close to the valve island.

3. The automatic gas tightness detection device of the fuel cell stack according to claim 1, characterized in that: The valve island comprises: a four-position manifold (600), a first solenoid valve (500), a second solenoid valve (510), a third solenoid valve (520), a fourth solenoid valve (530), a first induction check valve (400), a second induction check valve (410), a third induction check valve (420), and a fourth induction check valve (430); The inlet at one end of the four-position manifold (600) is connected to the outlet of the compressed air source (900) through a pipeline, and the other end of the four-position manifold (600) is provided with four outlets, and the four outlets are connected to the inlets of the first solenoid valve (500), the second solenoid valve (510), the third solenoid valve (520) and the fourth solenoid valve (530) in sequence, the outlet of the first solenoid valve (500) is connected to the inlet of the first induced check valve (400), the outlet of the second solenoid valve (510) is connected to the inlet of the second induced check valve (410), and the The outlet of the third solenoid valve (520) is connected to the inlet of the third induction check valve (420), the outlet of the fourth solenoid valve (530) is connected to the inlet of the fourth induction check valve (430), the outlet of the first induction check valve (400) is connected to the first test channel (200), the outlet of the second induction check valve (410) is connected to the second test channel (210), the outlet of the third induction check valve (420) is connected to the third test channel (220), and the outlet of the fourth induction check valve (430) is connected to the fourth test channel (230).

4. The automatic gas tightness detection device of the fuel cell stack according to claim 1, characterized in that: The valve island further comprises: a main air intake pipe (1200), a fifth solenoid valve (1100), a sixth solenoid valve (1110), a seventh solenoid valve (1120), an eighth solenoid valve (1130), a first electric ball valve (1000), a second electric ball valve (1010), a third electric ball valve (1020) and a fourth electric ball valve (1030); The inlet at one end of the main air intake pipe (1200) is connected to the outlet of the compressed air source (900) through a pipeline, and the other end of the main air intake pipe (1200) is provided with four outlets, and the four outlets are connected to the inlets of the fifth solenoid valve (1100), the sixth solenoid valve (1110), the seventh solenoid valve (1120) and the eighth solenoid valve (1130) in sequence, the outlet of the fifth solenoid valve (1100) is connected to the inlet of the first electric ball valve (1000), the outlet of the sixth solenoid valve (1110) is connected to the inlet of the second electric ball valve (1010), and the outlet of the seventh solenoid valve (1120) is connected to the inlet of the second electric ball valve (1010). The outlet of the seventh solenoid valve (1120) is connected to the inlet of the third electric ball valve (1020), the outlet of the eighth solenoid valve (1130) is connected to the inlet of the fourth electric ball valve (1030), the outlet of the first electric ball valve (1000) is connected to the first test channel (200), the outlet of the second electric ball valve (1010) is connected to the second test channel (210), the outlet of the third electric ball valve (1020) is connected to the third test channel (220), and the outlet of the fourth electric ball valve (1030) is connected to the fourth test channel (230).

5. The automatic gas tightness detection device of the fuel cell stack according to claim 1, characterized in that: The battery stack comprises a first battery stack chamber (100), a second battery stack chamber (110), a third battery stack chamber (120) and a fourth battery stack chamber (130); An end of the first test channel (200) away from the valve island is connected to the first stack chamber (100), an end of the second test channel (210) away from the valve island is connected to the second stack chamber (110), an end of the third test channel (220) away from the valve island is connected to the third stack chamber (120), and an end of the fourth test channel (230) away from the valve island is connected to the fourth stack chamber (130).

6. The automatic gas tightness detection device of the fuel cell stack according to claim 1, characterized in that: The device also includes: a controller, an audible and visual alarm; The controller is signal-connected to the first pressure sensor (300), the second pressure sensor (310), the third pressure sensor (320), and the fourth pressure sensor (330) respectively; The sound and light alarm is connected to the controller signal.

Images