Fuel cell stack flow distribution testing device

Abstract

The invention discloses a fuel cell stack flow distribution testing device which is configured to be connected with a fuel cell stack, the fuel cell stack comprises a plurality of single cells which are adjacent in sequence and abut against each other, each single cell is provided with a hydrogen channel, an air channel and a cooling channel, and the fuel cell stack flow distribution testing device comprises a base, a measuring assembly and a translation assembly, the base is configured to be connected with a plurality of single batteries, the measuring assembly comprises two measuring rods, the measuring rods are hollow, one ends of the two measuring rods are respectively inserted into the hydrogen channel or the air channel or the cooling channel and can be communicated with the hydrogen channel or the air channel or the cooling channel, and the other ends of the two measuring rods are communicated with external measuring equipment; the translation assembly comprises a support and a translation piece, the support is connected with the two measuring rods and slidably connected to the base, and the translation piece is connected to the base and the support and used for driving the support and the two measuring rods to translate relative to the base. The method can effectively solve the problem that the flow distribution of the fuel cell stack in the power generation state cannot be obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cell stack, in particular to a fuel cell stack flow distribution testing device. BACKGROUND

[0002] The fuel cell reactor, i.e. the stack, is assembled by stacking multiple sets of bipolar plates and membrane electrodes through sealing structures, and the flow distribution between each single cell usually directly affects the overall performance and efficiency of the stack. In order to measure whether the flow distribution of the single cell is consistent, relevant research has emerged.

[0003] For example, the Chinese invention patent with publication number CN109638319B, entitled "Fuel cell stack fluid distribution consistency detection method and device", measures the pressure drop value of the single cell inlet and outlet or the dynamic pressure value of the single cell outlet to calculate the fluid distribution amount of the single cell, so as to judge the consistency of the fluid distribution in the fuel cell stack and guide the optimization design of the common channel of the stack. The method and device directly and simply obtain the consistency result of the fluid flow distribution, and the method is simple, practical and effective.

[0004] Although the pressure drop value of different single cells is obtained by using the measuring rod, thereby obtaining the flow distribution consistency between the single cells, the method cannot realize online testing under the power generation state of the stack, and can only test the flow distribution of the fuel cell offline. SUMMARY

[0005] The present application aims to overcome the above technical deficiencies and provide a fuel cell stack flow distribution testing device to solve the technical problem that the measuring device in the prior art can only be used when the fuel cell stack is offline, thereby failing to obtain the flow distribution of the fuel cell stack under the power generation state.

[0006] To achieve the above technical purpose, the present application adopts the following technical scheme: In a first aspect, the present application provides a fuel cell stack flow distribution testing device configured to connect a fuel cell stack, wherein the fuel cell stack comprises a plurality of single cells, the plurality of single cells are sequentially adjacent and abut each other, the single cell has a hydrogen channel, an air channel and a cooling channel, and the hydrogen channel or the air channel or the cooling channel of two adjacent single cells is connected, comprising: a base configured to connect a plurality of single cells; a measuring assembly comprising two measuring rods, the measuring rods are hollow inside, one end of the two measuring rods is respectively inserted into the hydrogen channel or the air channel or the cooling channel, and can be connected with the hydrogen channel or the air channel or the cooling channel, and the other end is connected with an external measuring device; and The translation component comprises a bracket and a translation component, the bracket is connected with two measuring rods and is slidingly connected with the base, and the translation component is connected with the base and the bracket and is used to drive the bracket and the two measuring rods to translate relative to the base.

[0007] In some embodiments, the translation component further comprises a fixed seat and at least one sliding block, the fixed seat is arranged at a distance from the fuel cell stack and is connected with the base, the fixed seat is provided with a sliding groove, one end of the sliding block is slidingly arranged in the sliding groove, the other end of the sliding block is connected with the bracket, and the sliding block can slide relative to the fuel cell stack under the driving of the translation component.

[0008] In some embodiments, the bracket comprises at least one support, a crossbeam and two connecting parts, the support is detachably connected with the sliding block, the crossbeam is horizontally arranged and connected with the support, the two connecting parts are arranged in parallel with each other and perpendicular to the crossbeam and are both connected with the crossbeam, and the two connecting parts are arranged to connect the two measuring rods respectively.

[0009] In some embodiments, the position of the connecting point between the connecting part and the crossbeam can be adjusted in the vertical direction.

[0010] In some embodiments, the connecting part is uniformly provided with a plurality of mounting holes along the length direction thereof, the measuring rod can pass through any one of the mounting holes, and the bracket further comprises an abutting part, the abutting part abuts against the measuring rod and is detachably connected with the connecting part.

[0011] In some embodiments, the fuel cell stack flow distribution testing device further comprises two first supports, the first supports are arranged between the bracket and the fuel cell stack, one end of the first support is connected with the measuring rod, the other end of the first support is connected with the base, and the first support is used to support the measuring rod.

[0012] In some embodiments, the first support has a connecting end and a supporting end, the connecting end of the first support is detachably connected with the base, the supporting end of the first support is provided with a groove for accommodating the measuring rod, and the supporting end of the first support can move close to or away from the connecting end thereof.

[0013] In some embodiments, the fuel cell stack further comprises a cathode end plate and an anode end plate, a plurality of the single cells are arranged in sequence and abut against each other between the cathode end plate and the anode end plate, the cathode end plate is provided with two first through holes which are in communication with the hydrogen passage, and the measuring assembly further comprises two first sealing members, the first sealing members are arranged in one-to-one correspondence with the measuring rods, and the measuring rods are detachably connected with the first through holes through the first sealing members.

[0014] In some embodiments, the fuel cell stack flow distribution testing device further comprises at least one second support, the second support comprising at least one electric connector and at least two insulating sleeves, the electric connector being arranged between and in electrical contact with two adjacent single cells, and the insulating sleeves being arranged one by one on the measuring rods and sleeved on the measuring rods, and both of the insulating sleeves being connected to the electric connector.

[0015] In some embodiments, the second support further comprises an insulating plate, the insulating plate being provided with a plurality of through grooves corresponding to the hydrogen channels, air channels and cooling channels of the single cells, the insulating sleeves being arranged in the through grooves and connected to the insulating plate, and the number of the electric connectors in the second support being two, the two electric connectors being connected to the two side walls of the insulating plate and in electrical contact with two adjacent single cells, respectively.

[0016] Compared with the prior art, the fuel cell stack flow distribution testing device provided by the present application has the following beneficial effects: the plurality of single cells are arranged on the base, one end of the two sliding rods is inserted into the hydrogen channel, air channel or cooling channel of the plurality of single cells and can communicate with the hydrogen channel, air channel or cooling channel, the other end of the two measuring rods is in communication with the external measuring equipment, and the translating member can drive the two measuring rods to slide with the support relative to the base. Compared with the prior art, by using the translating member to drive the support and the measuring rods to move relative to the plurality of single cells of the fuel cell stack, and changing the position where one end of the measuring rod is inserted into the hydrogen channel, air channel or cooling channel, the pressure of the inlet and outlet of the single cell at different positions is introduced into the external measuring equipment through the measuring rod, which can assist the measurement personnel to obtain the flow distribution of each single cell in the stack by pressure drop distribution, so as to determine whether the flow distribution of the fuel cell stack is consistent in the power generation state, and solve the technical problem that the measuring device in the prior art can only be used when the fuel cell stack is offline, so that the flow distribution of the fuel cell stack in the power generation state cannot be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a three-dimensional view of a fuel cell stack flow distribution testing device provided by an embodiment of the present application; Figure 2 is an enlarged view of position A in Figure 1 Figure 3 is another perspective three-dimensional view of a fuel cell stack flow distribution testing device provided by an embodiment of the present application; Figure 4 is a three-dimensional view of a single cell provided by an embodiment of the present application; ​Figure 5 is a three-dimensional view of the second support connecting with the fuel cell stack according to an embodiment of the present application; Figure 6 is a three-dimensional view of the measuring assembly connecting with the fuel cell stack according to an embodiment of the present application; Figure 7 is a three-dimensional view of the measuring assembly connecting with the support according to an embodiment of the present application; Figure 8 is a three-dimensional view of the second support according to an embodiment of the present application.

[0018] Explanation of reference signs: fuel cell stack 100; single cell 110; air or oxygen inlet 111; air or oxygen outlet 112; cooling liquid inlet 113; cooling liquid outlet 114; hydrogen inlet 115; hydrogen outlet 116; cathode end plate 120; anode end plate 130; cathode insulation plate 140; anode insulation plate 150; connecting body 160; base 200; measuring assembly 300; measuring rod 310; first sealing member 320; sealing joint 321; first sealing ring 322; second sealing member 330; sealing plug 331; second sealing ring 332; translation assembly 400; support 410; support part 411; crossbeam 412; connecting part 413; abutting part 414; translation member 420; fixing seat 430; sliding block 440; connecting block 450; screw 460; driving motor 470; first support 500; support seat 510; fixing cylinder 520; telescopic rod 530; locking bolt 540; second support 600; electrical connecting body 610; insulation sleeve 620; insulation plate 630. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0020] To address the technical problem that existing measuring devices can only be used when the fuel cell stack 100 is offline, thus making it impossible to obtain the flow distribution of the fuel cell stack 100 in power generation mode, this invention provides a fuel cell stack flow distribution testing device. This device utilizes a translational member 420 to move the support 410 and measuring rod 310 relative to the multiple individual cells 110 of the fuel cell stack 100, changing the position of one end of the measuring rod 310 within the hydrogen, air, or cooling channels. This allows the pressure at the inlet and outlet of the individual cells 110 at different positions to be introduced into external measuring equipment via the measuring rod 310. This assists the measuring personnel in obtaining the flow distribution of each individual cell 110 within the stack through pressure drop distribution, thereby determining whether the flow distribution of the fuel cell stack 100 is consistent in power generation mode.

[0021] Please see Figures 1 to 8 , Figure 1 This is a schematic diagram of a fuel cell stack flow distribution testing device according to an embodiment of the present invention. The fuel cell stack flow distribution testing device is configured to connect to a fuel cell stack 100. The fuel cell stack 100 includes multiple individual cells 110, which are sequentially adjacent and abutting each other. Each individual cell 110 has a hydrogen channel, an air channel, and a cooling channel, and the hydrogen channel, air channel, or cooling channel of two adjacent individual cells 110 are connected. The device includes a base 200, a measuring component 300, and a translation component 400. The base 200 is configured to connect the multiple individual cells 110 and measure... The measuring component 300 includes two measuring rods 310, each of which is hollow inside. One end of each measuring rod 310 is inserted into a hydrogen channel, an air channel, or a cooling channel, and is connected to the hydrogen channel, air channel, or cooling channel. The other end of each measuring rod 310 is connected to an external measuring device. The translation component 400 includes a bracket 410 and a translation member 420. The bracket 410 is connected to both measuring rods 310 and is slidably connected to the base 200. The translation member 420 is connected to the base 200 and the bracket 410 and is used to drive the bracket 410 and the two measuring rods 310 to translate relative to the base 200.

[0022] In this device, compared to existing technologies, by using the translational member 420 to move the support 410 and the measuring rod 310 relative to the multiple individual cells 110 of the fuel cell stack 100, and changing the position of one end of the measuring rod 310 inserted into the hydrogen channel, air channel, or cooling channel, the pressure at the inlet and outlet of the individual cells 110 at different positions is introduced into the external measuring equipment through the measuring rod 310. This helps the measuring personnel to obtain the flow distribution of each individual cell 110 inside the stack through the pressure drop distribution, so as to determine whether the flow distribution of the fuel cell stack 100 is consistent in the power generation state. This solves the technical problem in the prior art that the measuring device can only be used when the fuel cell stack 100 is offline, thus making it impossible to obtain the flow distribution of the fuel cell stack 100 in the power generation state.

[0023] The single cell 110 has six through slots on both sides: A, B, C, D, E, and F. Slot A is an air or oxygen inlet 111, and slot F is an air or oxygen outlet 112. Both slots A and F are connected to the internal air channel of the single cell 110. Slot B is a coolant inlet 113, and slot E is a coolant outlet 114. Both slots B and E are connected to the internal cooling channel of the single cell 110. Slot C is a hydrogen inlet 115, and slot D is a hydrogen outlet 116. Both slots C and D are connected to the internal hydrogen channel of the single cell 110. This is a conventional setting known to those skilled in the art. For reference, see Chinese Invention Patent No. CN116387585A, entitled "A Fuel Cell". Further details are omitted here.

[0024] Furthermore, since the individual cells 110 are sequentially adjacent and abut against each other, as the translation component continuously drives the measuring rod 310 to insert, the measuring rod 310 can introduce the gas inside the individual cells 110 located at different positions into the external measuring device. By measuring the pressure of the gas using the external measuring device, the measuring personnel can obtain the flow distribution of each individual cell 110 inside the stack through the pressure drop distribution. Here, the external measuring device is a commonly available and purchased pressure testing device. Using the external measuring device to check the pressure drop is a conventional setting known to those skilled in the art. For reference, please refer to the Chinese invention patent with publication number CN109638319B, entitled: A method and device for detecting the consistency of fluid distribution in a fuel cell stack 100. Further details will not be provided here.

[0025] Furthermore, the measuring rod 310 is a common hollow stainless steel round tube that is readily available and easy to purchase on the market. The measuring rod 310 has a hollow interior, with one end welded shut and the other end open. At the same time, an opening is made on the side near the welded end. This structure allows the gas and corresponding gas pressure inside the single cell 110 located at the opening position of the measuring rod 310 to be drawn out when the opening position of the measuring rod 310 passes through the single cell 110, and then to the outside of the fuel cell stack through the other end of the measuring rod 310. This will not be described in detail here.

[0026] In some embodiments, the base 200 is mounted on the tooling and can be moved or raised / lowered, allowing users to adjust it according to market scenarios; this will not be elaborated further here.

[0027] In one embodiment, such as Figure 1 , Figure 3 As shown, in order to improve the safety and stability of the detection device, the bottom of the fuel cell stack 100 is also provided with an anode insulating pad and a cathode insulating pad, which are used to connect the fuel cell stack 100 and the base 200. This will not be described in detail here.

[0028] In this embodiment, as Figure 1 , Figure 3 As shown, the fuel cell stack 100 also includes a cathode plate 120 and an anode plate 130. Multiple single cells 110 are arranged sequentially adjacent to each other and abutting against each other between the cathode plate 120 and the anode plate 130. The cathode plate 120 has two first through holes that communicate with hydrogen channels. The measurement assembly 300 also includes two first seals 320. The first seals 320 are arranged in a one-to-one correspondence with the measuring rods 310, and the measuring rods 310 are detachably connected to the first through holes via the first seals 320.

[0029] Multiple single cells 110 form a stable overall structure through the cathode end plate 120 and anode end plate 130 at both ends. The first through hole is used to connect the cathode end plate 120 with the hydrogen channel, air channel or cooling channel of the single cell 110, so that the measuring rod 310 can be inserted into the hydrogen channel, air channel or cooling channel of the single cell 110 through the first through hole.

[0030] Furthermore, the first seal 320 is used to seal the first through hole.

[0031] In one embodiment, such as Figure 3 As shown, the fuel cell stack 100 also includes a cathode insulating plate 140, an anode insulating plate 150, and at least one connector 160. The cathode insulating plate 140 is disposed between the cathode end plate 120 and the single cell 110, the anode insulating plate 150 is disposed between the cathode end plate 120 and the single cell 110, and at least one connector 160 is connected to both the cathode end plate 120 and the anode end plate 130 to form an integral unit.

[0032] Furthermore, the cathode end plate 120, anode end plate 130, cathode insulating plate 140, anode insulating plate 150, and at least one connector 160 are all common and readily available equipment on the market, and are conventional settings known to those skilled in the art, so they will not be described in detail here.

[0033] In one embodiment, such as Figure 6 As shown, the first sealing element 320 includes a sealing joint 321 and a first sealing ring 322. The sealing joint 321 is detachably connected to the first through hole and is used to open or block the first through hole. The sealing joint 321 has a through hole that allows the measuring rod 310 to pass through. The first sealing ring 322 is sleeved on the measuring rod 310 and abuts against the circumferential inner wall of the first through hole and the sealing joint 321.

[0034] The first sealing joint 321 and the first sealing ring 322 are used to achieve a sealed connection between the measuring rod 310 and the first through hole.

[0035] Furthermore, the first sealing joint 321 and the first sealing ring 322 are common and readily available equipment on the market, and are conventional settings known to those skilled in the art, so they will not be described in detail here.

[0036] In one embodiment, such as Figure 6 As shown, the cathode end plate 120 also has two second through holes and two third through holes. The two second through holes are connected to the cooling channel, and the two third through holes are connected to the hydrogen channel. The measuring assembly 300 also includes multiple second seals 330. The second seals 330 include sealing plugs 331 and second sealing rings 332. The sealing plugs 331 are connected to the two second through holes and the two third through holes to open or block the two second through holes and the two third through holes, and the second sealing rings 332 can enhance the sealing effect.

[0037] Furthermore, the sealing plug 331 and the second sealing ring 332 are common and readily available equipment on the market, and are conventional settings known to those skilled in the art, so they will not be described in detail here.

[0038] In this embodiment, as Figure 3 As shown, the translation component 400 also includes a fixed base 430 and at least one sliding block 440. The fixed base 430 is spaced apart from the fuel cell stack 100 and connected to the base 200. The fixed base 430 has a sliding groove. One end of the sliding block 440 is slidably embedded in the sliding groove and the other end is connected to the bracket 410. The sliding block 440 can slide relative to the fuel cell stack 100 under the action of the translation component 420.

[0039] By using the translation member 420 to push the sliding block 440 to slide along the groove on the fixed base 430, the measuring rod 310 can slide relative to the fixed base 430 together, and ensure the horizontal movement of the measuring rod 310.

[0040] Furthermore, the groove serves to connect and guide the sliding of the sliding block 440 and the measuring rod 310.

[0041] In one embodiment, please refer to Figure 3 The fixed base 430 has a receiving groove along its length inside. The sliding groove is connected to the receiving groove and passes through the two side walls of the fixed base 430. The translational component 400 also includes two L-shaped connecting blocks 450, a screw 460 and a drive motor 470. The sliding block 440 is built into the receiving groove and has a threaded hole. One end of the two L-shaped connecting blocks 450 is slidably embedded in the sliding groove and is connected to the sliding block 440. The other end is connected to the bracket 410. The screw 460 is rotatably connected to the inner wall of the receiving groove and is threadedly connected to the threaded hole of the sliding block 440. The fixed end of the drive motor 470 is connected to the fixed base 430 and the output shaft is connected to the screw 460. It is used to drive the sliding block 440, the two L-shaped connecting blocks 450, the bracket 410 and the two measuring rods 310 to slide along the guide of the sliding groove.

[0042] Furthermore, the screw 460 and drive motor 470 are common and readily available equipment on the market, and are conventional settings known to those skilled in the art, so they will not be described in detail here.

[0043] In one embodiment, please refer to Figure 7 The bracket 410 includes at least one support part 411, a crossbeam 412 and two connecting parts 413. The support part 411 is detachably connected to the sliding block 440. The crossbeam 412 is horizontally arranged and connected to the support part 411. The two connecting parts 413 are parallel to each other and perpendicular to the crossbeam 412, and are both connected to the crossbeam 412. The two connecting parts 413 are respectively configured to connect to two measuring rods 310.

[0044] The two measuring rods 310 are stably supported by at least one support part 411, a crossbeam 412 and two connecting parts 413, thereby ensuring that the two measuring rods 310 can be smoothly inserted into the fuel cell stack under the drive of the translation member, avoiding the risk of short circuit or fire caused by the measuring rods 310 contacting the single cell 110.

[0045] Furthermore, in some embodiments, such as Figure 1 , 3 and Figure 7 As shown, there are two support parts 411. The two support parts 411 are connected to two L-shaped connecting blocks 450 respectively, and the crossbeam 412 is connected to both support parts 411 to form a stable support structure.

[0046] Furthermore, the two connecting parts 413 are respectively arranged parallel to each other and perpendicular to the crossbeam 412 in the vertical direction, and are respectively connected to the two ends of the crossbeam 412 to connect and support the two measuring rods 310.

[0047] In this embodiment, the position of the connection point between the connecting part 413 and the crossbeam 412 can be adjusted in the vertical direction.

[0048] The installation height of the measuring rod 310 can be adjusted according to measurement requirements by adjusting the position of the connection point between the connecting part 413 and the crossbeam 412.

[0049] In one embodiment, please refer to Figure 7 The connecting part 413 has a plurality of mounting holes evenly provided along its length direction. The measuring rod 310 can pass through any one of the mounting holes. The bracket 410 also includes an abutting part 414, which abuts against the measuring rod 310 and is detachably connected to the connecting part 413.

[0050] The measuring rod 310 is detachably connected to the mounting hole via the abutment part 414.

[0051] Furthermore, by adjusting the insertion of the measuring rod 310 into the mounting holes at different heights, the user can change the installation height of the measuring rod 310 to meet different measurement needs.

[0052] In some embodiments, the abutment portion 414 is a bolt that is common in the market and easy to purchase. The side wall of the connecting portion 413 is provided with multiple threaded connection holes. The threaded connection holes are provided in a one-to-one correspondence with the mounting holes and are connected to the mounting holes. The threaded section of the bolt is threadedly connected to the threaded connection hole and abuts against the outer wall of the measuring rod 310 to limit the sliding of the measuring rod 310 relative to the mounting hole.

[0053] Furthermore, the mounting hole on the crossbeam 412 relative to the connecting part 413 is provided with a threaded fixing hole. The threaded section of the fixing bolt passes through the mounting hole and is threadedly connected to the threaded fixing hole, which is used to connect the connecting part 413 to the crossbeam 412. This will not be described in detail here.

[0054] In one embodiment, please refer to Figure 1 , Figure 3 The fuel cell stack flow distribution testing device also includes two first support members 500. The first support members 500 are disposed between the bracket 410 and the fuel cell stack 100. One end of the first support member 500 is connected to the measuring rod 310 and the other end is connected to the base 200 to support the measuring rod 310.

[0055] By setting two first support members 500 between the fuel cell stack 100 and the support 410 to support the two measuring rods 310 respectively, the measuring rods 310 are kept horizontal during movement, thus avoiding contact between the measuring rods 310 and the single cell 110 and causing safety hazards.

[0056] In one embodiment, please refer to Figure 1 , Figure 3 The first support member 500 has a connecting end and a supporting end. The connecting end of the first support member 500 is detachably connected to the base 200, and the supporting end has a groove for accommodating the measuring rod 310. The supporting end of the first support member 500 can move closer to or further away from its connecting end.

[0057] The height of the first support member 500 can be adaptively adjusted according to the position height of the measuring rod 310, thereby effectively ensuring the level of the measuring rod 310.

[0058] Furthermore, by setting the groove, the sway of the measuring rod 310 relative to the first support member 500 can be limited, effectively ensuring the level of the measuring rod 310.

[0059] Furthermore, in some embodiments, such as Figure 2 As shown, the first support member 500 includes a support base 510, a fixed cylinder 520, a telescopic rod 530, and a locking bolt 540.

[0060] Furthermore, the support base 510 is detachably connected to the base 200, the fixing cylinder 520 is vertically arranged and connected to the support base 510, and the fixing cylinder 520 has a telescopic groove and a locking threaded hole. The telescopic rod 530 is slidably inserted into the telescopic groove, and the threaded section of the locking bolt 540 is threadedly connected to the locking threaded hole and abuts against the telescopic rod 530 to limit the extension or shortening of the telescopic rod 530 relative to the fixing cylinder 520.

[0061] Furthermore, in some embodiments, such as Figure 2 As shown, the opening of the groove gradually increases in size along the direction away from the connection end of the support.

[0062] Furthermore, by setting a groove with a "V"-shaped cross-section, the swaying of the measuring rod 310 relative to the first support member 500 can be effectively prevented.

[0063] In this example, as Figure 5 , Figure 8As shown, the fuel cell stack flow distribution testing device also includes at least one second support member 600. The second support member 600 includes at least one electrical connector 610 and at least two insulating sleeves 620. The electrical connector 610 is disposed between two adjacent single cells 110 and electrically abuts against both adjacent single cells 110. The insulating sleeves 620 are disposed one-to-one with the measuring rods 310 and are sleeved on the measuring rods 310. Both insulating sleeves 620 are connected to the electrical connector 610.

[0064] By providing a second support member 600 within the fuel cell stack 100, the movement path of the measuring rod 310 can be effectively restricted, thereby effectively avoiding the safety hazards caused by the measuring rod 310 contacting the single cell 110.

[0065] In one embodiment, please refer to Figure 8 The second support member 600 also includes an insulating plate 630. The insulating plate 630 has multiple through slots relative to the hydrogen channel, air channel and cooling channel of the single cell 110. The insulating sleeve 620 is built into the through slots and connected to the insulating plate 630. The second support member 600 has two electrical connectors 610. The two electrical connectors 610 are respectively connected to the two side walls of the insulating plate 630 and respectively electrically abut against the two adjacent single cells 110.

[0066] The insulating plate 630 is used to support and connect multiple insulating sleeves 620. At the same time, by setting two electrical connectors 610 on both sides of the insulating plate 630, electrical connection between two adjacent single cells 110 is achieved.

[0067] Furthermore, the insulating plate 630 and the insulating sleeve 620 are common and readily available equipment on the market, and are conventional settings known to those skilled in the art, so they will not be described in detail here.

[0068] In some embodiments, the second support 600 may also be an insulating support strip, one end of which is connected to the cathode insulating plate 140, and the other end is inserted into the hydrogen channel, cooling channel, or air channel, and can abut against the measuring rod 310 to support the measuring rod 310.

[0069] To better understand this invention, the following is combined with... Figures 1 to 8 The technical solution of the present invention will be described in detail below: Multiple individual cells 110 are mounted on the base 200. One end of each of the two sliding rods is inserted into the hydrogen, air, or cooling channels of the individual cells 110 and is connected to these channels. The other ends of the two measuring rods 310 are connected to external measuring equipment. The translational member 420 can drive the two measuring rods 310 to slide relative to the base 200 along with the support 410. Compared to existing technologies, by using the translational member 420 to move the support 410 and the measuring rods 310 relative to the multiple individual cells 110 of the fuel cell stack 100, and changing the position of one end of the measuring rod 310 inserted into the hydrogen, air, or cooling channels, the pressure at the inlet and outlet of the individual cells 110 at different positions is introduced into the external measuring equipment through the measuring rods 310. This allows the measuring personnel to obtain the flow distribution of each individual cell 110 inside the stack through the pressure drop distribution, in order to determine whether the flow distribution of the fuel cell stack 100 is consistent during power generation.

[0070] In the specific workflow of this invention, during use, firstly, the second support member 600 is connected to the fuel cell stack 100, and the anode insulating pad, cathode insulating pad, drive motor 470, and two first support members 500 are all fixed on the base 200 according to the designed positions. Next, the fuel cell stack 100 is installed on the anode insulating pad and cathode insulating pad, and the measuring rods 310 are respectively installed on the connecting parts 413, so that the two measuring rods 310 are respectively fixed on the two connecting parts 413 and the first support members 500. Then, the drive motor 470 operates... The measuring rod 310 is moved horizontally, and the coaxiality of the measuring rod 310 and the first through hole on the cathode end plate 120 is adjusted to ensure that the measuring rod 310 can move horizontally in the cathode end plate 120. The measuring rod 310 passes through the inlet and outlet channels of the fuel cell stack 100 in sequence through the single cell 110 and the insulating sleeve 620 on the second support member 600. Finally, the fuel cell stack 100 is driven to generate electricity. The inlet and outlet pressures of the single cell 110 at different positions are obtained by moving the measuring rod 310 in sequence, so as to obtain the flow distribution inside the stack through the pressure drop distribution.

[0071] Furthermore, by mounting the fuel cell stack 100 on the base 200 and controlling the movement of the measuring rod 310 inside the fuel cell stack 100, the flow distribution of each individual cell 110 in the power generation state can be measured. The insulating sleeves 620 of the first support member 500 and the second support member 600 increase the constraint around the measuring rod 310, preventing the measuring rod 310 from contacting the individual cells 110 and causing a short circuit due to shaking during movement. This enables the flow distribution test of the fuel cell in the actual power generation state. At the same time, by constraining the shaking of the measuring rod 310, it is prevented from shaking due to excessive airflow, which would increase the measurement error. It also prevents the measuring rod 310 from touching the internal channels of the stack and causing damage to the stack structure.

[0072] This application, through the above structure, can solve the technical problem in the prior art that the measuring device can only be used when the fuel cell stack 100 is offline, thus making it impossible to obtain the flow distribution of the fuel cell stack 100 in the power generation state.

[0073] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A fuel cell stack flow distribution testing device, configured to connect to a fuel cell stack, the fuel cell stack comprising multiple individual cells, the multiple individual cells being sequentially adjacent and abutting each other, each individual cell having a hydrogen channel, an air channel, and a cooling channel, and the hydrogen channel, air channel, or cooling channel of two adjacent individual cells being connected, characterized in that, include: A base is configured to connect multiple of the single batteries; The measuring assembly includes two measuring rods, each measuring rod being hollow inside. One end of each measuring rod is respectively inserted into the hydrogen channel, the air channel, or the cooling channel, and is capable of communicating with the hydrogen channel, the air channel, or the cooling channel. The other end of each measuring rod is connected to an external measuring device. The translational assembly includes a bracket and a translational component. The bracket is connected to both of the measuring rods and is slidably connected to the base. The translational component is connected to the base and the bracket and is used to drive the bracket and the two measuring rods to translate relative to the base.

2. The fuel cell stack flow distribution testing device according to claim 1, characterized in that, The translational component further includes a fixed base and at least one sliding block. The fixed base is spaced apart from the fuel cell stack and connected to the base. The fixed base has a sliding groove. One end of the sliding block is slidably embedded in the sliding groove and the other end is connected to the bracket. The sliding block can slide relative to the fuel cell stack under the action of the translational component.

3. The fuel cell stack flow distribution testing device according to claim 2, characterized in that, The bracket includes at least one support part, a crossbeam, and two connecting parts. The support part is detachably connected to the sliding block. The crossbeam is horizontally arranged and connected to the support part. The two connecting parts are parallel to each other and perpendicular to the crossbeam, and are both connected to the crossbeam. The two connecting parts are respectively configured to connect to the two measuring rods.

4. The fuel cell stack flow distribution testing device according to claim 3, characterized in that, The position of the connection point between the connecting part and the crossbeam can be adjusted in the vertical direction.

5. The fuel cell stack flow distribution testing device according to claim 3, characterized in that, The connecting part has a plurality of mounting holes evenly distributed along its length, and the measuring rod can pass through any one of the mounting holes. The bracket also includes an abutting part, which abuts against the measuring rod and is detachably connected to the connecting part.

6. The fuel cell stack flow distribution testing device according to claim 3, characterized in that, The fuel cell stack flow distribution testing device further includes two first support members, which are disposed between the bracket and the fuel cell stack. One end of the first support member is connected to the measuring rod and the other end is connected to the base to support the measuring rod.

7. The fuel cell stack flow distribution testing device according to claim 6, characterized in that, The first support member has a connecting end and a supporting end. The connecting end of the first support member is detachably connected to the base, and the supporting end has a groove for accommodating the measuring rod. The supporting end of the first support member can move closer to or further away from its connecting end.

8. The fuel cell stack flow distribution testing device according to claim 3, characterized in that, The fuel cell stack also includes a cathode plate and an anode plate. Multiple individual cells are arranged sequentially adjacent to each other and abutting against each other between the cathode plate and the anode plate. The cathode plate has two first through holes that communicate with the hydrogen channel. The measurement component also includes two first seals. The first seals are arranged one-to-one with the measuring rods, and the measuring rods are detachably connected to the first through holes via the first seals.

9. The fuel cell stack flow distribution testing device according to claim 8, characterized in that, The fuel cell stack flow distribution testing device further includes at least one second support member. The second support member includes at least one electrical connector and at least two insulating sleeves. The electrical connector is disposed between two adjacent single cells and electrically abuts against both adjacent single cells. The insulating sleeves are disposed one-to-one with the measuring rods and are sleeved on the measuring rods. Both insulating sleeves are connected to the electrical connector.

10. The fuel cell stack flow distribution testing device according to claim 9, characterized in that, The second support also includes an insulating plate, which has multiple through slots relative to the hydrogen channel, air channel and cooling channel of the single cell. The insulating sleeve is built into the through slots and connected to the insulating plate. The second support has two electrical connectors, which are respectively connected to the two side walls of the insulating plate and electrically abut against two adjacent single cells.

Images