Fuel cell voltage detection structure

Abstract

The utility model discloses a fuel cell voltage detection structure which comprises a bipolar plate, a tab and a lead, the lead is connected with the tab, and the bipolar plate is detachably connected with the tab. According to the fuel cell voltage detection structure provided by the embodiment of the utility model, the bipolar plate and the tab can be separated and replaced in the stages of research, development, test, troubleshooting and the like, so that troubleshooting is facilitated, and the design and development period is shortened; moreover, when a single body breaks down, the tab and the bipolar plate can be detached, and only the bipolar plate needs to be replaced, so that the maintenance cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of fuel cells, and specifically to a fuel cell voltage detection structure. Background Technology

[0002] Fuel cell technology is a new type of energy utilization that can convert the chemical energy in hydrogen into electrical energy to supply power to the outside world. Due to its advantages such as high energy conversion efficiency, zero emissions, low operating noise, and low maintenance costs, it is regarded as one of the main development directions of future power technology.

[0003] Fuel cell stacks are mainly divided into metal plate stacks and graphite plate stacks. The stack is composed of stacked cells. In metal plate stacks, voltage detection is primarily achieved by extracting voltage signals from the tabs on the bipolar plates of each cell. Currently, the tabs in metal plate stacks are typically protruding structures on the bipolar plates, connected to wires via welding or other methods to achieve voltage signal acquisition and detection.

[0004] The connection structure between the bipolar plate and the tab is a permanent fixed structure. During the research and development, testing and troubleshooting stages, it is impossible to separate and replace the bipolar plate and the tab. In addition, when a single cell or wire fails, the entire bipolar plate (including the tab) needs to be replaced, which results in high maintenance costs. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, embodiments of this utility model propose a fuel cell voltage detection structure that enables the separation and replacement of bipolar plates and tabs during research and development testing and troubleshooting stages, which is more conducive to troubleshooting and shortens the design and development cycle. Furthermore, when a cell fails, the tabs and bipolar plates can be separated, and only the bipolar plates need to be replaced, thereby reducing maintenance costs.

[0007] The fuel cell voltage detection structure of this utility model embodiment includes a bipolar plate, a tab, and a wire. The wire is connected to the tab, and the bipolar plate is detachably connected to the tab.

[0008] In some embodiments, the bipolar plate has a first plug-in structure, and the tab has a second plug-in structure, wherein the first plug-in structure and the second plug-in structure are plugged into each other.

[0009] In some embodiments, the bipolar plate has a insertion slot, the tab includes a insertion portion, the insertion portion is inserted into the insertion slot, the insertion slot forms a first insertion structure, and the insertion portion forms a second insertion structure.

[0010] In some embodiments, the bipolar plate includes a snap-fit ​​groove communicating with the insertion slot, and the tab includes a snap-fit ​​portion that engages with the snap-fit ​​groove.

[0011] In some embodiments, the plug slot has an opening for inserting the tab, and the snap-fit ​​slot is arranged on the side of the plug slot away from the opening; the snap-fit ​​portion includes a first protrusion and a second recess, the groove wall of the snap-fit ​​slot has a first recess and a second protrusion, the second protrusion is closer to the opening than the first recess, the first protrusion engages with the first recess, and the second protrusion engages with the second recess.

[0012] In some embodiments, the first protrusion has a deformation groove on the side away from the first recess, so that the first protrusion can elastically deform toward the deformation groove.

[0013] In some embodiments, both the first protrusion and the first recess are arc-shaped.

[0014] In some embodiments, the number of the snap-fit ​​parts is two, and the two snap-fit ​​parts are arranged opposite to each other.

[0015] In some embodiments, the insertion slot has a slot sidewall, and the second protrusion has a transition surface disposed toward the slot sidewall, the transition surface gradually moving away from the slot sidewall in a direction away from the slot opening.

[0016] In some embodiments, the bipolar plate includes a first electrode plate and a second electrode plate connected to each other, the first electrode plate having a first groove and the second electrode plate having a second groove, the first groove and the second groove forming the insertion slot.

[0017] The fuel cell voltage detection structure of this utility model allows for the separation and replacement of the bipolar plate and electrode tabs during the research and development testing and troubleshooting stages by detachably connecting the electrode tabs and bipolar plates. This facilitates fault diagnosis and effectively improves efficiency and shortens the design and development cycle while ensuring connection reliability. Furthermore, when a cell fails, the electrode tabs and bipolar plates can be separated, and only the bipolar plates need to be replaced, thereby reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a fuel cell voltage detection structure according to an embodiment of the present invention.

[0019] Figure 2 This is an exploded view of a fuel cell voltage detection structure according to an embodiment of the present invention.

[0020] Figure label:

[0021] 100. Fuel cell voltage detection structure;

[0022] 1. Bipolar plate; 11. Insertion slot; 111. Slot opening; 112. Slot sidewall; 12. Snap-fit ​​slot; 121. First recess; 122. Second protrusion; 13. First electrode plate; 14. Second electrode plate;

[0023] 2. Electrode; 21. Insertion part; 22. Snap-fit ​​part; 221. First protrusion; 222. Second recess; 2221. Transition surface; 223. Deformation groove; 23. Connecting part;

[0024] 3. Wires. Detailed Implementation

[0025] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] like Figure 1 As shown, the fuel cell voltage detection structure 100 of this utility model embodiment includes a bipolar plate 1, an electrode tab 2, and a wire 3. The wire 3 is connected to the electrode tab 2, and the electrode tab 2 is detachably connected to the bipolar plate 1.

[0027] The fuel cell voltage detection structure 100 of this utility model detachably connects the tab 2 and the bipolar plate 1, enabling the separation and replacement of the bipolar plate 1 and the tab 2 during the research and development testing and troubleshooting stages. This facilitates fault diagnosis and effectively improves efficiency and shortens the design and development cycle while ensuring connection reliability. Furthermore, when a cell fails, the tab 2 and the bipolar plate 1 can be separated, and only the bipolar plate 1 needs to be replaced, thereby reducing maintenance costs.

[0028] Understandably, the detachable function of tab 2 and bipolar plate 1 is mainly used in the research and development testing and troubleshooting stage of fuel cells. After the fuel cell design is completed and the product is finalized, tab 2 can be welded to bipolar plate 1 to permanently fix bipolar plate 1 and tab 2, ensuring the stability of the connection between bipolar plate 1 and tab 2, which is more conducive to the acquisition and detection of voltage signals of fuel cells.

[0029] In some embodiments, the bipolar plate 1 has a first plug-in structure, and the tab 2 has a second plug-in structure, with the first plug-in structure and the second plug-in structure being plugged into each other.

[0030] In some embodiments, such as Figure 1 and Figure 2 As shown, the bipolar plate 1 has a plug groove 11, and the tab 2 includes a plug part 21. The plug part 21 is plugged into the plug groove 11, the plug groove 11 forms the first plug structure, and the plug part 21 forms the second plug structure.

[0031] The bipolar plate 1 and the tab 2 are detachable by plugging them together, which can ensure the reliability of the connection between the bipolar plate and the tab 2 while allowing for repeated plugging and unplugging, and the operation is relatively convenient.

[0032] Of course, in other embodiments, a plug-in portion 21 can be provided on the bipolar plate 1 and a plug-in slot 11 can be provided on the tab 2, as long as the bipolar plate 1 and the tab 2 can be detachably connected.

[0033] In some embodiments, the bipolar plate 1 includes a snap-fit ​​groove 12 communicating with the insertion groove 11, and the tab 2 includes a snap-fit ​​portion 22, which engages with the snap-fit ​​groove 12.

[0034] After the tab 2 is connected to the bipolar plate 1, the relative position of the tab 2 and the bipolar plate 1 can be further restricted by the snap-fit ​​of the snap-fit ​​part 22 and the snap-fit ​​groove 12, thereby improving the reliability of the connection between the tab 2 and the bipolar plate 1.

[0035] In some embodiments, such as Figure 1 and Figure 2 As shown, the insertion slot 11 has a slot 111 for inserting the electrode tab 2, and the snap-fit ​​slot 12 is arranged on the side of the insertion slot 11 away from the slot 111; the snap-fit ​​part 22 includes a first protrusion 221 and a second recess 222, and the groove wall of the snap-fit ​​slot 12 has a first recess 121 and a second protrusion 122. The second protrusion 122 is closer to the slot 111 than the first recess 121. The first protrusion 221 is engaged with the first recess 121, and the second protrusion 122 is engaged with the second recess 222.

[0036] With the above settings, after the plug-in part 21 is plugged into the plug-in slot 11, the first protrusion 221 engages with the first concave part 121, and the second protrusion 122 engages with the second concave part 222, that is, the snap-fit ​​part 22 engages with the snap-fit ​​slot 12, thereby achieving a stable connection between the bipolar plate 1 and the tab 2.

[0037] As an example, such as Figure 1 and Figure 2 As shown, the bipolar plate 1 is thin, making both the insertion slot 11 and the snap-fit ​​slot 12 flat. The slot 111 is located on one side of the bipolar plate 1. The tab 2 also includes a connecting part 23. The snap-fit ​​part 22, the insertion part 21 and the connecting part 23 are arranged in sequence. The tab 2 is inserted into the insertion slot 11 through the slot 111. The insertion part 21 cooperates with the insertion slot 11, the snap-fit ​​part 22 cooperates with the snap-fit ​​slot 12, and the connecting part 23 is arranged on the outside of the bipolar plate 1. The wire 3 is connected to the connecting part 23.

[0038] The first protrusion 221 and the second concave portion 222 are arranged sequentially along the insertion direction of the tab 2 relative to the bipolar plate 1, with the second concave portion 222 being closer to the insertion portion 21 than the first protrusion 221.

[0039] In some embodiments, such as Figure 2 As shown, the first protrusion 221 has a deformation groove 223 on the side away from the first recess 121, so that the first protrusion 221 can elastically deform in the direction of the deformation groove 223.

[0040] Since the second protrusion 122 is formed by the inward protrusion of the groove wall of the snap-fit ​​groove 12, the second protrusion 122 will squeeze the first protrusion 221 during the process of inserting and pulling the tab 2 into and out of the snap-fit ​​groove 11. With the above arrangement, the first protrusion 221 can undergo elastic deformation when squeezed, which is more conducive to the first protrusion 221 passing through the second protrusion 122 of the snap-fit ​​groove 12.

[0041] In some embodiments, such as Figure 2 As shown, both the first protrusion 221 and the first concave portion 121 are arc-shaped.

[0042] The first protrusion 221 abuts against the second protrusion 122 through the arc surface, making it easier for the electrode tab 2 to be inserted into the insertion slot 11.

[0043] In some embodiments, such as Figure 2 As shown, there are two snap-fit ​​parts 22, which are arranged opposite to each other.

[0044] With the above settings, when the tab 2 is connected to the bipolar plate 1, the two snap-fit ​​parts 22 simultaneously engage with the snap-fit ​​groove 12, which can further improve the reliability of the connection between the tab 2 and the bipolar plate 1, so that the tab 2 and the bipolar plate 1 can maintain a reliable connection during multiple insertions and removals.

[0045] As an example, such as Figure 2 As shown, the two snap-fit ​​parts 22 are arranged opposite to each other, and the two snap-fit ​​parts 22 form a deformation groove 223. The ends of the two snap-fit ​​parts 22 away from the insertion part 21 are not connected to each other, so as to form a notch in the deformation groove 223; thus, the two snap-fit ​​parts 22 can undergo elastic deformation inward at the same time.

[0046] The shape of the snap-fit ​​groove 12 matches that of the snap-fit ​​part 22. The part of the groove sidewall 112 of the snap-fit ​​groove 12 away from the insertion groove 11 is arc-shaped, and this part of the arc-shaped groove wall forms the first recess 121 mentioned above. The part of the groove sidewall 112 of the snap-fit ​​groove 12 near the insertion groove 11 forms the second protrusion 122 mentioned above.

[0047] During the process of inserting the tab 2 into the insertion slot 11, the first protrusion 221 first abuts against the second protrusion 122. The second protrusion 122 forces the first protrusion 221 to undergo elastic deformation towards the deformation groove 223. When the two first protrusions 221 pass between the two second protrusions 122, the two first protrusions 221 return to their original shape under their own elastic force and cooperate with the first recess 121, thereby realizing the snap-fit ​​cooperation between the snap-fit ​​part 22 and the snap-fit ​​slot 12 to ensure the stability of the connection between the tab 2 and the bipolar plate 1.

[0048] In some embodiments, such as Figure 2 As shown, the insertion slot 11 has a slot sidewall 112, and the second protrusion 122 has a transition surface 2221 arranged toward the slot sidewall 112. The transition surface 2221 gradually moves away from the slot sidewall 112 in a direction away from the slot opening 111.

[0049] During the process of inserting the tab 2 into the bipolar plate 1, the transition surface 2221 can guide the first protrusion 221 of the locking part 22, guiding the locking part 22 to undergo elastic deformation inward, so that the tab 2 can be inserted into the bipolar plate 1 more smoothly.

[0050] In some embodiments, the bipolar plate 1 includes a first plate 13 and a second plate 14 connected to each other. The first plate 13 has a first groove, and the second plate 14 has a second groove. The first groove and the second groove form a insertion groove 11.

[0051] With the above settings, the first electrode plate 13 and the second electrode plate 14 can be formed by stamping from sheet metal, thereby reducing production costs.

[0052] Optionally, the first electrode plate 13 and the second electrode plate 14 are bonded together.

[0053] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fuel cell voltage detection structure (100), characterized in that, It includes a bipolar plate (1), a tab (2) and a wire (3), the wire (3) being connected to the tab (2), and the bipolar plate (1) being detachably connected to the tab (2).

2. The fuel cell voltage detection structure (100) according to claim 1, characterized in that, The bipolar plate (1) has a first plug-in structure, and the tab (2) has a second plug-in structure. The first plug-in structure and the second plug-in structure are plugged into each other.

3. The fuel cell voltage detection structure (100) according to claim 2, characterized in that, The bipolar plate (1) has a plug groove (11), and the tab (2) includes a plug part (21). The plug part (21) is plugged into the plug groove (11). The plug groove (11) forms the first plug structure, and the plug part (21) forms the second plug structure.

4. The fuel cell voltage detection structure (100) according to claim 3, characterized in that, The bipolar plate (1) includes a snap-fit ​​groove (12) connected to the insertion groove (11), and the electrode ear (2) includes a snap-fit ​​part (22) which engages with the snap-fit ​​groove (12).

5. The fuel cell voltage detection structure (100) according to claim 4, characterized in that, The insertion slot (11) has a slot (111) for inserting the electrode (2), and the snap-fit ​​slot (12) is arranged on the side of the insertion slot (11) away from the slot (111); The snap-fit ​​portion (22) includes a first protrusion (221) and a second recess (222). The groove wall of the snap-fit ​​groove (12) has a first recess (121) and a second protrusion (122). The second protrusion (122) is closer to the groove opening (111) than the first recess (121). The first protrusion (221) is engaged with the first recess (121), and the second protrusion (122) is engaged with the second recess (222).

6. The fuel cell voltage detection structure (100) according to claim 5, characterized in that, The first protrusion (221) has a deformation groove (223) on the side away from the first recess (121) so that the first protrusion (221) can elastically deform in the direction of the deformation groove (223).

7. The fuel cell voltage detection structure (100) according to claim 6, characterized in that, Both the first protrusion (221) and the first concave part (121) are arc-shaped.

8. The fuel cell voltage detection structure (100) according to claim 7, characterized in that, The number of the latching parts (22) is two, and the two latching parts (22) are arranged opposite to each other.

9. The fuel cell voltage detection structure (100) according to claim 5, characterized in that, The insertion slot (11) has a slot sidewall (112), and the second protrusion (122) has a transition surface (2221) arranged toward the slot sidewall (112), the transition surface (2221) gradually moving away from the slot sidewall (112) in a direction away from the slot opening (111).

10. The fuel cell voltage detection structure (100) according to any one of claims 3-9, characterized in that, The bipolar plate (1) includes a first plate (13) and a second plate (14) connected to each other. The first plate (13) has a first groove, and the second plate (14) has a second groove. The first groove and the second groove form the insertion groove (11).

Images