A fuel cell stack testing device and fuel cell stack assembly

Abstract

This invention discloses a fuel cell stack testing device and a fuel cell stack assembly. The fuel cell stack testing device is used to detect the voltage of the fuel cell stack. The fuel cell stack testing device includes a testing component and a fixing component. The testing component includes multiple probes, which can respectively abut against multiple individual cells. The fixing component includes a first fixing block, a second fixing block, and a third fixing block. One end of the fixing component is connected to the probes, and the other end is connected to the substrate. The fuel cell stack assembly includes the fuel cell stack testing device, and also includes the fuel cell stack body formed by stacking multiple individual cells and the substrate. The fuel cell stack testing device of this invention can stably detect the voltage of individual cells, ensuring the safe and reliable operation of the fuel cell stack.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and in particular to a fuel cell stack testing device and a fuel cell stack assembly. Background Technology

[0002] A fuel cell is a device that converts the chemical energy of fuel (hydrogen) and oxidant (air / oxygen, etc.) into electrical energy through an electrochemical reaction. A single fuel cell (consisting of two bipolar plates and a single membrane electrode assembly) operates at a voltage range of 0.4V to 1.0V, which is insufficient for practical applications. Therefore, fuel cell stacks used in real-world applications consist of multiple individual cells combined together.

[0003] The operating temperature, humidity, pressure, and mechanical damage within the fuel cell stack directly affect the voltage of each individual cell. The performance of each individual cell is a crucial factor influencing the overall performance of the fuel cell stack. During normal operation, the voltage of each individual cell should remain consistent. If the voltage of any individual cell falls significantly below the overall average voltage, the fuel cell must be shut down immediately to protect the stack. Accurate monitoring of the voltage of each individual cell is essential for ensuring the safe and reliable operation of the fuel cell stack.

[0004] In conventional technologies, trenches are typically created on individual cells, with a detection module placed inside the trench. Terminals or clips are then connected to the detection module to obtain the voltage signal from the individual cell. However, the module and terminals generally use a clearance fit, which is prone to wobbling under external force. Furthermore, the clamping force between the module and the terminal originates from the cantilever structure at the bend of the terminal leads. Since the terminals are mostly made of copper alloy with thin walls, the clamping force generated by the cantilever structure at the bend weakens due to insertion, removal, and shaking. This can easily lead to poor contact, causing the detection component to detach and damage the battery stack, resulting in poor detection stability and compromising the safe and reliable operation of the battery stack. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a battery stack testing device that can stably detect the voltage of individual cells, ensuring the safe and reliable operation of the battery stack.

[0006] An embodiment of the first aspect of the present invention provides a battery stack detection device for detecting battery stack voltage. The battery stack includes a substrate and a battery stack body. The substrate includes a first plate and a second plate spaced apart and arranged opposite to each other along a first direction. The battery stack body is formed by stacking multiple single-cell batteries and is disposed between the first plate and the second plate. The battery stack detection device includes:

[0007] The detection component includes multiple probes, each of which can respectively abut against multiple individual battery cells;

[0008] A fixing component, one end of which is connected to the probe and the other end of which is connected to the substrate.

[0009] In some embodiments, the probe includes an abutment and a plug, the abutment being connected to one side of the plug along the first direction, the plug being used to connect a terminal, and the abutment being able to abut the single battery along a second direction, the second direction intersecting the first direction.

[0010] In some embodiments, the abutment includes an arcuate protrusion capable of abutting the single battery cell.

[0011] In some embodiments, a plurality of probes are spaced apart from each other, the abutting members of adjacent probes along the first direction are disposed on the same side of the connector, and the abutting members of adjacent probes along the third direction are arranged opposite to each other, the third direction intersecting the first direction and the second direction.

[0012] In some embodiments, the fixing component includes a first fixing block having a first receiving cavity capable of accommodating the probe.

[0013] In some embodiments, multiple first fixing blocks are provided. Each first fixing block includes a locking block and a locking slot. The locking block and the locking slot are arranged at intervals along the first direction. The locking block of the first fixing block can pass through the locking slot of another first fixing block to connect multiple first fixing blocks.

[0014] In some embodiments, the fixing component further includes a second fixing block and a third fixing block, wherein the second fixing block is accommodating in a second receiving cavity of the third fixing block and the third fixing block abuts against the first fixing block along the second direction.

[0015] In some embodiments, the second fixing block is provided with a hook block at its end along the third direction, and the third fixing block is provided with a hook groove at its end along the third direction, the hook block being able to pass into the hook groove.

[0016] In some embodiments, along the first direction, one end of the third fixing block is connected to the first plate and the other end is connected to the second plate, so that the probe is fixed on the substrate.

[0017] A second aspect of the present invention provides a battery stack assembly, which includes a battery stack detection device as described in the above embodiments, and further includes the battery stack body formed by stacking a plurality of the single cells and the substrate.

[0018] According to the above embodiments, the beneficial effects of the present invention are:

[0019] In the proposed technical solution, the probe directly contacts the individual cell, and the fixing component securely connects the detection component to the substrate. Compared to the method of directly setting grooves on the stack, placing plugs, and then connecting them to the terminals using gap fit to detect the stack voltage, this solution uses the fixing component to directly connect the detection component and the substrate into a whole. This results in higher stability, preventing the detection component from falling off and damaging the stack, ensuring the continuous normal operation of the stack, avoiding breakage of terminals and leads due to external forces, improving detection stability, avoiding the need to create grooves on individual cells, reducing damage to individual cells, and adapting to voltage detection of various stacks with different structures and specifications, thus having a wider range of applications. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a fuel cell stack and a fuel cell stack detection device in some embodiments of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a fuel cell stack and some components of a fuel cell stack detection device in some embodiments of the present invention;

[0023] Figure 3 This is a partial exploded view of a fuel cell stack detection device in some embodiments of the present invention, wherein the protective sleeve and the first fixing block are in an assembled state;

[0024] Figure 4 This is a cross-sectional schematic diagram of a fuel cell stack detection device in some embodiments of the present invention; wherein the second fixing block and the third fixing block are in an assembled state;

[0025] Figure 5 This is a cross-sectional schematic diagram of a fuel cell stack and a fuel cell stack detection device in some embodiments of the present invention; wherein, a portion of the fuel cell stack is shown;

[0026] Figure 6 This is a schematic diagram of the structure of a probe insertion terminal in some embodiments of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of a probe in some embodiments of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of a first fixing member in some embodiments of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of a second fastener in some embodiments of the present invention;

[0030] Figure 10 This is a schematic diagram of the structure of a protective sleeve in some embodiments of the present invention;

[0031] Figure 11 yes Figure 2 A magnified view of a portion of point A in the middle.

[0032] In the accompanying drawings, the reference numerals indicate:

[0033] Fuel cell stack 100; substrate 110; first plate 111; second plate 112; fuel cell stack body 120; single cell 121;

[0034] Detection component 200; probe 210; abutment 211; insertion component 212; arc-shaped protrusion 213;

[0035] Fixing component 300; first fixing block 310; first receiving cavity 311; locking block 312; locking groove 313; positioning protrusion 314; second fixing block 320; hook block 321; connector 3211; limiting member 3212; transition surface 3213; cavity 322; connecting hole 323; third fixing block 330; hook groove 331; second receiving cavity 332; positioning groove 333;

[0036] terminal 400;

[0037] Protective sleeve 500; accommodating cavity 510; through hole 520;

[0038] Wire 600;

[0039] First direction X; second direction Y; third direction Z.

[0040] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0043] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0044] In contrast, conventional technologies typically involve creating trenches on individual cells and placing detection modules within these trenches. Terminals or clips are then used to connect to the detection modules to obtain the voltage signal from the individual cells. However, the modules and terminals generally use a clearance fit, which makes them prone to wobbling under external forces. Furthermore, the clamping force between the modules and terminals originates from the cantilever structure at the bend of the terminal leads. Since the terminals are mostly made of copper alloy with thin walls, the clamping force generated by the cantilever structure at the bend weakens due to insertion, removal, and shaking. This can easily lead to poor contact, causing the detection components to detach and damage the battery. Consequently, the detection stability is poor, and the safe and reliable operation of the battery stack cannot be guaranteed.

[0045] In view of this, refer to Figures 1 to 11 This invention proposes a battery stack testing device for detecting the voltage of a battery stack 100. The battery stack 100 includes a substrate 110 and a battery stack body 120. The substrate 110 includes a first plate 111 and a second plate 112 spaced apart and arranged opposite to each other along a first direction X. For ease of understanding and description, the first direction X here refers to the thickness direction of the battery stack 100. The battery stack body 120 is formed by stacking multiple single-cell batteries 121. The battery stack body 120 is disposed between the first plate 111 and the second plate 112. The relevant structure and arrangement of the battery stack 100 can be referred to in the prior art. Specifically, the battery stack testing device includes a testing component 200 and a fixing component 300.

[0046] The detection component 200 is used to monitor the voltage of each individual cell 121 in the fuel cell stack 100. The detection component 200 includes multiple probes 210, as shown in the figure. Figure 4 and Figure 5 In some embodiments of the present invention, the probe 210 is exemplified by an L-shaped structural member consisting of a connector 212 and an abutment 211, with reference to... Figure 7 .

[0047] Multiple probes 210 can abut against multiple individual battery cells 121. It can be understood that one end of the probe 210 away from the abutment member 211 can be connected to the terminal 400 and the wire 600 to achieve detection of the individual battery cell 121. Terminal 400 refers to... Figures 4 to 6 Wire 600 reference Figure 1 , Figure 2 and Figure 11 .

[0048] The fixing component 300 is used to secure the detection component 200 to the fuel cell stack 100. One end of the fixing component 300 is connected to the probe 210, and the other end is connected to the substrate 110. In some embodiments of the present invention, a combination of the first fixing block 310, the second fixing block 320, and the third fixing block 330 is used as an example, see below. Figures 1 to 5 .

[0049] In the proposed technical solution, the probe 210 directly abuts against the single cell 121, and the fixing component 300 fixes the detection component 200 to the substrate 110. Compared with the method of directly setting grooves on the stack 100, placing plugs, and then connecting them to the terminals 400 with a gap fit to detect the voltage of the stack 100, this solution uses the fixing component 300 to directly connect the detection component 200 and the substrate 110 into a whole. It has higher stability, which can prevent the detection component 200 from falling off and damaging the stack 100, ensuring the continuous normal operation of the stack 100, avoiding the breakage of the terminals 400 and leads due to external forces, improving the stability of detection, and avoiding the need to open grooves on the single cell 121, reducing damage to the single cell 121. It can also be adapted to the voltage detection of stacks 100 with different structures and specifications, and has a wider range of applications.

[0050] In some embodiments, the probe 210 includes an abutment 211 and a connector 212, as shown in the figure. Figure 6 and Figure 7The abutment 211 is used to abut against the single battery 121. The abutment 211 can be a rectangular plate with protrusions or an elliptical plate with protrusions. The abutment 211 can be made of various metal materials; in this embodiment, the abutment 211 is an example of a rectangular brass plate with protrusions. The insertion member 212 is used to insert the terminal 400. The insertion member 212 can be a rectangular plate or a strip plate. In this embodiment, the insertion member 212 is an example of a rectangular brass plate. The abutment 211 is connected to one side of the insertion member 212 along the first direction X. It should be noted that the insertion member 212 can also be provided with an arc transition along the end opposite to the abutment 211 to facilitate the insertion of the insertion member 212 into the terminal 400.

[0051] It is understood that the abutment 211 and the insertion part 212 of the probe 210 can be integrally formed, or they can be separately formed and then combined. In this embodiment of the invention, the abutment 211 and the insertion part 212 are integrally formed. The integrally formed probe 210 has a simple processing technology; the raw material plate can be directly bent and excess material trimmed. Compared with the combined abutment 211 and insertion part 212, this simplifies the processing steps, reduces processing costs, and improves work efficiency.

[0052] The abutment 211 can abut against the single battery 121 in the second direction Y, as shown in the figure. Figure 2 , Figure 5 and Figure 11 For ease of description and understanding, the second direction Y here is taken as the width direction of the fuel cell stack 100. The second direction Y intersects the first direction X. It can be understood that the second direction Y can be perpendicular to the first direction X, or it can be at other angles that are not perpendicular to the first direction X, depending on the actual situation. In some embodiments of the present invention, the second direction Y is perpendicular to the first direction X as an example.

[0053] In some embodiments, the abutment 211 includes an arcuate protrusion 213, as shown in the figure. Figures 4 to 7 The arc-shaped protrusion 213 can abut against the single battery cell 121. The arc-shaped protrusion 213 can be configured in various ways, as long as the arc-shaped surface of the protrusion abuts against the battery. It should be noted that the arc-shaped protrusion 213 refers to a protrusion whose surface protrudes from the substrate and has a streamlined cross-section. In this embodiment of the invention, the arc-shaped protrusion 213 can be formed by stamping the abutment member 211. The arc-shaped protrusion 213 reduces the possibility of detection interruption due to external force interference preventing the arc-shaped protrusion 213 from abutting against the single battery cell 121, thus improving the stability margin of the detection.

[0054] It's understandable that the 210 probe could be wrapped in a 500mm protective case, for reference. Figure 2 , Figure 3 and Figure 11The protective sleeve 500 can be made of insulating material. In some embodiments, the protective sleeve 500 can be made of plastic. In other embodiments, the protective sleeve 500 can be made of rubber. In other embodiments, the protective sleeve 500 can also be made of insulating fiber. The structure of the protective sleeve 500 depends on the structure of the probe 210. It is understood that the protective sleeve 500 has a receiving cavity 510 for placing the probe 210 and a through hole 520 for the wire 600 to pass through, the through hole 520 communicating with the receiving cavity 510. In this embodiment of the invention, a roller-type plastic sleeve is used as an example of the protective sleeve 500.

[0055] In some embodiments, refer to Figure 2 , Figure 4 , Figure 8 and Figure 11 Multiple probes 210 are spaced apart from each other. The abutment members 211 of adjacent probes 210 along the first direction X are located on the same side of the connector 212, meaning the relative positions of the abutment members 211 and connector 212 of adjacent probes 210 along the first direction X are the same. The abutment members 211 of adjacent probes 210 along the third direction Z are arranged opposite to each other, meaning one abutment member 211 of adjacent probes 210 along the third direction Z faces the other abutment member 211. For ease of understanding and description, the length direction of the fuel cell stack 100 is taken as the third direction Z.

[0056] The third direction Z intersects the first direction X, meaning the third direction Z can be perpendicular to the first direction X, or it can be at other angles that are not perpendicular to the first direction X. The third direction Z can be perpendicular to the second direction Y. In this embodiment of the invention, the third direction Z is simultaneously perpendicular to both the first direction X and the second direction Y.

[0057] The arrangement of the probes 210 allows each individual cell 121 in the stack 100 to be effectively detected, while also reducing the overall size of the detection assembly 200 and saving space.

[0058] In some embodiments, refer to Figure 2 , Figure 3 , Figure 8 and Figure 11 The fixing component 300 includes a first fixing block 310. The first fixing block 310 has a first receiving cavity 311 capable of accommodating the probe 210. It should be noted that the probe 210 can be accommodated in the first receiving cavity 311 after being fitted with a protective sleeve 500 and connected to a terminal 400. The specific shape and size of the first receiving cavity 311 can be determined according to the structure of the protective sleeve 500. It can be understood that the arc-shaped protrusion 213 of the abutment 211 can extend out of the first fixing block 310, and the end of the protective sleeve 500 opposite to the abutment 211 can extend out of the first fixing block 310.

[0059] Multiple first fixed blocks 310 can be set, as shown in the reference. Figure 3 The first fixing block 310 includes a locking block 312 and a locking slot 313, the locking block 312 and the locking slot 313 being arranged at intervals along the first direction X, as shown in the figure. Figure 8 It is understood that the structure and size of the locking block 312 and the locking slot 313 can be the same, that is, the locking block 312 of the first fixing block 310 can be accommodated in the locking slot 313 of another first fixing block 310, thereby allowing multiple first fixing blocks 310 to be spliced ​​together. Therefore, the number of first fixing blocks 310 can be increased or decreased to adapt to the fuel cell stack 100 of different thicknesses, realize modular configuration, and expand the application range of the first fixing blocks 310. In some embodiments, the locking block 312 can be trapezoidal. In other embodiments, the locking block 312 can be triangular. The specific choice depends on the actual situation. This embodiment of the invention takes a trapezoidal locking block 312 and locking slot 313 as an example.

[0060] It should be noted that multiple locking blocks 312 and locking slots 313 can be provided on the first fixing block 310. Multiple locking blocks 312 and locking slots 313 are arranged at intervals along the third direction Z on the locking block 312. The arrangement of multiple locking blocks 312 and locking slots 313 can improve the assembly accuracy of multiple first fixing blocks 310.

[0061] In some embodiments, refer to Figures 3 to 5 The fixing assembly 300 also includes a second fixing block 320 and a third fixing block 330. The second fixing block 320 has a cavity 322 that can accommodate the portion of the probe 210 extending out of the first fixing block 310 and the protective sleeve 500. The third fixing block 330 can accommodate the second fixing block 320 and connect to the first fixing block 310. The third fixing block 330 abuts against the first fixing block 310 along the second direction Y.

[0062] It should be noted that the first fixing block 310 is also provided with a positioning protrusion 314 at its end along the third direction Z. The positioning protrusion 314 extends along the second direction Y, as shown in the figure. Figure 3 and Figure 8 In some embodiments, the first fixing block 310 has positioning protrusions 314 at both ends along the third direction Z. In some embodiments, the positioning block 312 is disposed at one end of the first fixing block 310 along the third direction Z. This embodiment of the invention takes the provision of positioning protrusions 314 at both ends as an example. It can be understood that the outer contour of the positioning protrusion 314 can be rectangular, triangular, or semi-circular, depending on the actual situation. In this embodiment of the invention, the positioning protrusion 314 is a rectangular protrusion as an example.

[0063] The third fixing block 330 has a positioning groove 333 at one end near the first fixing block 310, as shown in the reference. Figure 3 and Figure 4The positioning protrusion 314 can pass into the positioning groove 333 to achieve the assembly connection between the third fixing block 330 and the first fixing block 310, that is, the first fixing block 310 can be partially accommodated in the first receiving cavity 311. It can be understood that the structural shape of the positioning groove 333 is determined by the positioning protrusion 314.

[0064] The positioning protrusion 314 and positioning groove 333 facilitate the assembly and connection of the first fixing block 310 and the third fixing block 330, thereby improving assembly accuracy. Since the second fixing block 320 can be accommodated in the second receiving cavity 332 of the third fixing block 330, the above three fixing components, probe 210, and protective sleeve 500 can be connected as a whole, making the assembly process convenient and quick, and improving assembly efficiency.

[0065] The second fixing block 320 can be accommodated in the second receiving cavity 332 of the third fixing block 330, see reference. Figures 3 to 5 It can be understood that the extension height of the second fixing block 320 along the second direction Y is less than the extension height of the second receiving cavity 332.

[0066] It should be noted that the second fixing block 320 also includes a connecting hole 323 extending along the first direction X, and the connecting hole 323 communicates with the cavity 322. The connecting hole 323 facilitates the passage of the wire 600 through the connecting terminal 400 of the second fixing block 320, as shown in the reference. Figure 1 , Figure 3 and Figure 5 The specific location and number of the connecting holes 323 can be determined according to actual conditions. In this embodiment of the invention, two elongated connecting holes 323 are used as an example. It can be understood that the connecting holes 323 can also be multiple circular holes spaced apart along the first direction X, and multiple wires 600 can be inserted into these multiple circular holes respectively.

[0067] In some embodiments, hook blocks 321 are provided at both ends of the second connecting block along the third direction Z, as shown in the figure. Figure 1 and Figure 4 The third connecting block has hook grooves 331 at both ends along the third direction Z, and the hook block 321 can pass into the hook grooves 331. In this embodiment of the invention, an L-shaped hook block 321 is used as an example.

[0068] The hook block 321 includes a connector 3211 and a limiting member 3212 that are interconnected. The connector 3211 is connected to the body of the second fixing block, and the limiting member 3212 can abut against the groove of the third fixing block 330. It can be understood that the connector 3211 and the limiting member 3212 can be integrally formed.

[0069] The limiting component 3212 also includes a transition surface 3213, as shown in the figure. Figure 4 and Figure 9The transition surface 3213 can be an inclined surface or a curved surface. In this embodiment of the invention, the transition surface 3213 is an inclined surface. The transition surface 3213 is provided so that the limiting member 3212 can bend toward the body of the second fixing block 320 when it is assembled to abut against the third fixing block 330, so as to avoid being inserted into the hook groove 331.

[0070] In some embodiments, refer to Figure 1 , Figure 5 and Figure 11 A third fixing block 330 is detachably connected at one end to the first plate 111 and at the other end to the second plate 112 along the first direction X, so that the probe 210 is fixed to the substrate 110. The detachable connection between the third fixing block 330 and the substrate 110 can be a bolt connection, a spline connection, or a snap-fit ​​connection, depending on the actual situation. This embodiment of the invention uses a bolt connection as an example. By fastening the third fixing block 330 to the first plate 111 and the second plate 112, the probe 210 can be prevented from loosening under external force, so that the fixing assembly 300 can have a pre-tightening force along the first direction X, making the probe 210 more tightly abut against the single battery 121, ensuring the stable operation of the test.

[0071] This invention also proposes a battery stack assembly, which includes the battery stack detection device described in the above embodiments, as well as a battery stack body 120 formed by stacking multiple individual cells 121 and a substrate 110. The battery stack assembly of this invention can stably monitor the voltage of each individual cell 121 in its own battery stack 100, and can promptly detect abnormal voltage conditions of individual cells 121, ensuring the safe and reliable operation of the battery stack 100 and the safe use of related electrical equipment.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery stack testing device for detecting battery stack voltage, the battery stack comprising a substrate and a battery stack body, the substrate comprising a first plate and a second plate spaced apart and arranged opposite to each other along a first direction, the battery stack body being formed by stacking multiple single-cell batteries, the battery stack body being disposed between the first plate and the second plate, characterized in that, The fuel cell stack detection device includes: The detection component includes multiple probes, each of which can respectively abut against multiple individual battery cells; A fixing component, one end of which is connected to the probe and the other end of which is connected to the substrate; The probe includes an abutment and an insertion member. The abutment is connected to one side of the insertion member along the first direction. The insertion member is used to connect to a terminal. The abutment is capable of abutting the single battery cell along a second direction, which intersects the first direction. The plurality of probes are spaced apart from each other, and the abutting members of adjacent probes along the first direction are disposed on the same side of the connector. The abutting members of adjacent probes along the third direction are arranged opposite to each other, and the third direction intersects the first direction and the second direction. The fixing component includes a first fixing block, the first fixing block having a first receiving cavity capable of accommodating the probe; Multiple first fixing blocks are provided. Each first fixing block includes a locking block and a locking slot. The locking block and the locking slot are arranged at intervals along the first direction. The locking block of the first fixing block can pass into the locking slot of another first fixing block to connect multiple first fixing blocks. The fixing component further includes a second fixing block and a third fixing block, wherein the second fixing block is accommodated in a second receiving cavity of the third fixing block and the third fixing block abuts against the first fixing block along the second direction; The second fixing block is provided with a hook block at its end along the third direction, and the third fixing block is provided with a hook groove at its end along the third direction, and the hook block can pass into the hook groove.

2. The fuel cell stack testing device according to claim 1, characterized in that, The abutment includes an arc-shaped protrusion that can abut against the single battery cell.

3. The fuel cell stack testing device according to claim 1, characterized in that, Along the first direction, one end of the third fixing block is connected to the first plate and the other end is connected to the second plate, so that the probe is fixed on the substrate.

4. A fuel cell stack assembly, characterized in that, The device includes the battery stack testing apparatus as described in any one of claims 1 to 3, and further includes the battery stack body formed by stacking multiple of the single cells and the substrate.

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