Fuel cell unit voltage patrol connector

Abstract

The application relates to a fuel cell unit voltage patrol connector, which comprises a shell, a metal terminal and a pressing block, the shell is internally provided with a pin channel, the metal terminal is arranged in the pin channel, the pressing block is fixed in the shell and located at the entrance of the pin channel, the metal terminal comprises two metal pin pieces which are mutually inwardly arched, the outlet of the pin channel is provided with a reverse buckle part, one end of the metal pin piece abuts against the reverse buckle part, and the other end abuts against the pressing block at the entrance of the pin channel. Compared with the prior art, the metal pin pieces are mutually inwardly arched under the action of the reverse buckle part and the pressing block, the elastic force generated by the metal pin pieces firmly fixes the metal terminal in the pin channel, and the metal terminal cannot swing due to external force; meanwhile, the inward arching greatly improves the clamping force between the metal pin pieces, and ensures that the metal terminal is in good contact with the pin of an electrode plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fuel cell technology, in particular to a fuel cell unit voltage inspection connector. BACKGROUND

[0002] During the operation of a fuel cell, the voltage of the cell units constituting the stack needs to be detected in real time. At present, the detection device is connected to the pins of the polar plate 4 through a fuel cell unit voltage inspection connector. The contact between the connector and the polar plate 4 pins will directly affect the detection effect. As shown in Figure 1 and Figure 2 The existing connector is composed of a plastic shell 1, a metal terminal 2 and a pressing block 3. The following problems exist: first, the metal terminal 2 and the plastic shell 1 adopt a clearance fit, and under the action of external force, the metal terminal 2 will swing in the inner cavity of the plastic shell 1. Second, the tightening force of the metal terminal 2 is entirely derived from the material elasticity at the bent part of the terminal pin, which is a cantilever structure. The metal used to manufacture the metal terminal 2 is mostly copper alloy and has a relatively thin wall thickness, and the tightening force generated by the bent cantilever structure is relatively weak. The above two points both lead to the fact that the existing connector is prone to poor contact under vibration conditions. SUMMARY

[0003] The present application is to overcome the defects of the prior art and provide a fuel cell unit voltage inspection connector.

[0004] The object of the present application can be achieved by the following technical solutions:

[0005] A fuel cell unit voltage inspection connector, comprising a shell, a metal terminal and a pressing block, the shell is provided with a pin channel, the metal terminal is arranged in the pin channel, the pressing block is fixed in the shell and located at the entrance of the pin channel, the metal terminal comprises two metal pin pieces that are oppositely arched, a reverse buckle part is arranged at the outlet of the pin channel, one end of the metal pin piece abuts against the reverse buckle part, and the other end abuts against the pressing block at the entrance of the pin channel.

[0006] Further, the length of the metal pin piece when naturally unfolded is greater than the depth from the reverse buckle part to the entrance of the pin channel.

[0007] Further, the metal pin piece comprises an elastic part and a rigid part, the elastic part abuts against the reverse buckle part and is arched, and the rigid part abuts against the pressing block.

[0008] Further, one end of the shell is provided with a fixing groove, and the pressing block is installed in the fixing groove.

[0009] Further, the pressing block and the inner side wall of the fixing groove are connected through a buckle structure.

[0010] Further, a plurality of pin channels are included side by side, the pin channels are separated by a partition, and a plurality of metal terminals are arranged one by one in each pin channel.

[0011] Compared with the prior art, the present application has the following beneficial effects:

[0012] 1. The present application sets a reverse buckling part in the pin channel, and redesigns the structure of the metal pin sheet, so that the metal pin sheet is arched inward under the action of the reverse buckling part and the pressing block, and the elastic force generated thereby firmly fixes the metal terminal in the pin channel, and the metal pin sheet does not swing due to external force; at the same time, the arching greatly improves the clamping force between the metal pin sheets, and the arching structure uniformly disperses the clamping stress on the entire metal pin sheet, ensuring good contact with the pole pin.

[0013] 2. The length of the metal pin sheet when naturally unfolded is greater than the depth from the reverse buckling part to the entrance of the pin channel, and the metal pin sheet is pressed and bent by the designed interference amount, generating an elastic force for fixation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the prior art.

[0015] Figure 2 It is a partial enlarged schematic diagram of the prior art.

[0016] Figure 3 It is a structural schematic diagram of the embodiment.

[0017] Figure 4 It is a partial enlarged schematic diagram of the embodiment.

[0018] Figure 5 It is a schematic diagram of the principle after installation of the embodiment.

[0019] The drawing label: 1, shell, 11, pin channel, 11a, reverse buckling part, 12, fixing groove, 13, partition, 13a, positioning jack, 2, metal terminal, 21, metal pin sheet, 21a, elastic part, 21b, rigid part, 3, pressing block, 4, pole plate. DETAILED DESCRIPTION

[0020] The present application will be described in detail below in combination with the drawings and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present application, and gives a detailed implementation manner and specific operation process, but the protection scope of the present application is not limited to the following embodiments.

[0021] For example, Figure 3As shown, the embodiment provides a fuel cell unit voltage inspection connector, which comprises a shell 1, a metal terminal 2 and a pressing block 3. The shell 1 is a plastic shell, and a fixing groove 12 is arranged at the top of the shell 1. A plurality of pin channels 11 penetrating the bottom are arranged at the bottom of the fixing groove 12, and the lower end of the pin channel 11 is an outlet, and the upper end is an inlet. The metal terminal 2 connected with a wire is fixed in each pin channel 11 correspondingly. The pressing block 3 is installed in the fixing groove 12 to limit the metal terminal 2. The metal terminal 2 is a stepped structure, and part of the metal terminal 2 is clamped by the pressing block 3, and the wire can bypass the side of the pressing block 3. The pin of the polar plate 4 is inserted from the outlet of the pin channel 11, and the metal terminal 2 in the pin channel 11 is connected.

[0022] As shown, Figure 4 each metal terminal 2 comprises two metal pin pieces 21, each metal pin piece 21 comprises a rigid part 21b at the top and an elastic part 21a at the bottom, and the elastic parts 21a of the two pin pieces are oppositely arched. A reverse buckling part 11a is arranged at the outlet of the pin channel 11, and one end of the elastic part 21a of each metal pin piece 21 abuts against the reverse buckling part 11a. The length of the metal pin piece 21 when naturally unfolded is greater than the depth from the reverse buckling part 11a to the inlet of the pin channel 11, so that the top end of the rigid part 21b of the metal pin piece 21 slightly protrudes from the inlet of the pin channel 11 when naturally unfolded, forming an interference structure. When the pressing block 3 is installed in place in the fixing groove 12, as shown, Figure 5 the bottom of the pressing block 3 contacts the top end of the rigid part 21b, and the metal pin piece 21 is compressed, and the elastic part 21a of the metal pin piece 21 is further arched under the action of the pressure, forming a clamping structure.

[0023] In the embodiment, when the pressing block 3 is installed in place in the fixing groove 12, the pressing block 3 is fixed to the inner side of the fixing groove 12 by the buckle structure.

[0024] As shown, Figure 5 in the embodiment, the pin channels 11 are separated by a partition plate 13, and the bottom end of the partition plate 13 is provided with a positioning hole 13a, so that the pins of the polar plate 4 can be inserted into the positioning hole 13a alternately, which is easy to operate. The positioning hole 13a can also be designed as a foolproof structure to improve the operation convenience.

[0025] In summary, the embodiment is different from the existing connector, and the shortcomings of the traditional structure are avoided in structure. The metal terminal 2 and the shell 1 are interference in the height direction, the metal pin piece 21 is bent by the designed interference amount, and the elastic force generated thereby firmly fixes the metal terminal 2 in the pin channel 11; on the other hand, the bent metal pin piece 21 is firmly attached to the pin of the polar plate 4 to generate a considerable pressing force, and the reliability of the existing connector under vibration is greatly improved compared with the present application.

[0026] The preferred embodiments of the present application have been described above in detail. It should be understood that modifications and variations to the present application can be affected by those skilled in the art without departing from the scope of the application. Accordingly, it is intended that all of the subject matter of the above description and the claims be interpreted to encompass all such modifications and changes.

Claims

1. A fuel cell unit voltage patrol connector comprising a housing (1), a metal terminal (2) and a pressure block (3), the housing (1) having a pin passage (11) formed therein, the metal terminal (2) being disposed in the pin passage (11), and the pressure block (3) being fixed in the housing (1) and located at the entrance of the pin passage (11), characterized in that, The metal terminal (2) comprises two metal pin pieces (21) with opposite inner arches, the outlet of the pin channel (11) is provided with an undercut (11a), one end of the metal pin piece (21) abuts against the undercut (11a), and the other end abuts against the pressing block (3) at the inlet of the pin channel (11); The length of the metal pin piece (21) when naturally unfolded is greater than the depth from the undercut (11a) to the inlet of the pin channel (11); the metal pin piece is pressed and bent by a designed interference amount, so as to generate an elastic force for fixation; The metal pin piece (21) comprises an elastic part (21a) and a rigid part (21b), the elastic part (21a) abuts against the undercut (11a) and is arched inward, and the rigid part (21b) abuts against the pressing block (3).

2. A fuel cell unit voltage patrol connector according to claim 1, wherein One end of the shell (1) is provided with a fixing groove (12), and the pressing block (3) is installed in the fixing groove (12).

3. A fuel cell unit voltage patrol connector according to claim 2, wherein The pressing block (3) and the inner side wall of the fixing groove (12) are connected through a buckle structure.

4. A fuel cell unit voltage patrol connector according to claim 1, wherein A plurality of pin channels (11) are arranged side by side, the pin channels (11) are separated by a partition plate (13), and a plurality of metal terminals (2) are arranged one by one in each pin channel (11).

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