A fuel cell copper bar structure and processing technology

Abstract

The invention relates to the technical field of battery copper bars, and discloses a fuel cell copper bar structure and processing technology, comprising a copper bar body, electrode terminals are arranged at both ends of the copper bar body, redundant mechanisms are arranged between the inside of the copper bar body and the inside of the electrode terminals, insulating heat dissipation mechanisms, and clamping components; the invention provides the redundant mechanisms, when the copper bar body has a large tolerance and the electrode terminal cannot be installed at the fuel cell connection end, the movable seat is pulled to slide the electrode terminal, and the conductive copper sheet is stretched to the outside of the movable groove, so that the electrode terminal can extend a part, and then the electrode terminal can be installed at the fuel cell connection end; by providing a sliding block and a sliding groove, the position of one end of each conductive copper sheet in the sliding groove is different when the electrode terminal is bent, so that the contact between the plurality of conductive copper sheets is closer and the use is better, so that the copper bar can still be installed and used normally when errors occur in the copper bar processing, and the loss is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of battery copper bars, and in particular to a fuel cell copper bar structure and a processing technology. Background Art

[0002] Hydrogen fuel cells convert hydrogen and oxygen into electrical energy through electrochemical reactions under the action of catalysts. The final product is water. It has the advantages of high conversion efficiency, low noise and no pollution. It is considered to be one of the most important power development directions in the future. The fuel cell stack consists of a core, end plates, packaging, current collecting plates and copper bars. The core is composed of bipolar plates and membrane electrodes stacked on each other. When the core is compressed or thermally expanded and contracted, the core height will deform to a certain extent. The copper bar is needed to compensate for this deformation, conduct current transmission and connect to the DCF (direct current converter). At the same time, the copper bar is fixed to the packaging through the base to form a whole, which needs to meet the vibration shock and IP67 requirements.

[0003] The copper busbar is one of the important parts in the integrated structure of the fuel cell stack. Its function is to transfer the current collected by the collector plate to the outside of the fuel cell stack and connect it to the DCF (direct current converter). The copper busbar is required to have excellent voltage resistance (≥3000VDC), insulation performance (≥2000MΩ) and corrosion resistance (neutral salt spray test ≥360H). At the same time, the copper busbar base and the insulation layer, and the insulation layer and the hard copper busbar are required to meet IP67 requirements.

[0004] Traditional copper busbars are usually processed and manufactured according to the data provided by the customer. Since the data measurement is usually done manually and there will be certain deviations in the production process, some copper busbars will have certain tolerances during installation and cannot be used normally, resulting in some copper busbars being unable to be used normally, thus causing higher losses. Summary of the invention

[0005] The purpose of the present invention is to provide a fuel cell copper bar structure and processing technology to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A fuel cell copper bar structure, comprising:

[0008] A copper busbar body, wherein both ends of the copper busbar body are provided with electrode ends, and mounting holes are provided inside the electrode ends. The copper busbar body can be connected to the fuel cell connection end through the mounting holes inside the electrode ends and fixing bolts, and the electrode ends can also be mounted on the fuel cell connection end by welding;

[0009] A redundant mechanism, which is installed between the inside of the copper busbar body and the inside of the electrode end, and which enables the copper busbar structure to have a certain flexibility when connected to the fuel cell, thereby improving the reliability and stability of the copper busbar structure;

[0010] An insulating heat dissipation mechanism, which is arranged on the side wall of the copper busbar body and can isolate and insulate the copper busbar body by means of an insulating sleeve;

[0011] A clamping assembly is arranged at one end of the insulating heat dissipation mechanism, the clamping assembly is located on the side wall of the electrode end, and the clamping mechanism can fix the redundant mechanism when it is not in use.

[0012] Optionally, the redundant mechanism includes a movable seat, a conductive copper sheet and a sliding block, a movable groove is opened inside the copper busbar body, the movable seat is slidably connected inside the movable groove, one end of the conductive copper sheet is fixedly mounted on one end of the movable seat, a plurality of conductive copper sheets are provided, the sliding block is fixedly mounted on the other end of the conductive copper sheet, a sliding groove is opened inside the electrode end, and the sliding block is slidably connected inside the sliding groove.

[0013] Optionally, one end of the conductive copper sheet is slidably connected to the inside of the movable groove via a movable seat, and the other end of the conductive copper sheet is slidably connected to the inside of the sliding groove via a sliding block.

[0014] Optionally, the conductive copper sheet is located between the copper busbar body and the electrode end, and the copper busbar body and the electrode end are electrically connected via the conductive copper sheet.

[0015] Optionally, a movable groove is provided inside the copper busbar body, a movable block is slidably connected inside the movable groove, a heat shrinkable insulating tube is fixedly mounted on one end of the movable block, and the heat shrinkable insulating tube is located on one side of the conductive copper sheet.

[0016] Optionally, the insulating heat dissipation mechanism includes an isolation net and a filter net, the insulating sleeve is arranged on the side wall of the copper busbar body, the isolation net and the filter net are fixedly installed inside the insulating sleeve, the side wall of the insulating sleeve is provided with a heat conduction groove, the isolation net is located inside the heat conduction groove, the heat conduction groove is provided with a plurality of heat conduction holes penetrating the insulating sleeve, and the filter net is located inside the heat conduction hole.

[0017] Optionally, a plurality of limit blocks are fixedly mounted on the side wall of the copper busbar body, and the plurality of limit blocks fit with a plurality of the heat conducting holes.

[0018] Optionally, the clamping assembly includes an extension piece and a protrusion, the extension piece is fixedly mounted on one end of the insulating sleeve, a groove is provided on the inner wall of the extension piece, the protrusion is fixedly mounted inside the groove, and a clamping groove is provided on the side wall of the electrode end.

[0019] Optionally, the protrusion fits into the slot, and both the protrusion and the slot are semicircular.

[0020] A fuel cell copper bar structure processing technology specifically includes the following steps:

[0021] S1: Design drawings according to the data provided by the customer, prepare raw materials: select suitable copper materials as raw materials to ensure that they have good electrical conductivity and mechanical properties;

[0022] S2: Cutting: Use shearing machine, cutting machine or CNC cutting machine to cut the raw materials into required sizes;

[0023] S3: Forming: The forming process includes cold pressing, hot pressing, rolling and other methods to process the copper busbar into the required shape. During the processing, movable seats are installed inside the two ends of the copper busbar and several conductive copper sheets are welded at one end of the movable seats. Then, the other end of the conductive copper sheet is inserted and welded to the sliding block in the slide groove inside the electrode end, and a slot is opened on the side wall of the electrode end using a slotting machine;

[0024] S4: Use a slotting machine to open a heat conduction groove inside the insulating sleeve, and then use a hole punching machine to punch a heat conduction hole, insert the filter into the heat conduction hole, insert the isolation net into the heat conduction groove, use a slotting machine to open grooves and bumps on the inner wall of the extension piece, and clamp the extension piece to one end of the insulating sleeve. Finally, put the insulating sleeve on the side wall of the copper busbar body so that the limit block is located in the heat conduction hole, completing the leftmost part of the copper busbar structure.

[0025] The present invention has at least the following beneficial effects:

[0026] (1) This solution sets up a redundant mechanism. When the copper busbar body has a large tolerance and the electrode end cannot be installed at the fuel cell connection end, the movable seat is pulled to slide the electrode end, and the conductive copper sheet is stretched to the outside of the movable groove, so that the electrode end can extend a part, and then the electrode end can be installed at the fuel cell connection end. By setting a sliding block and a sliding groove, the position of one end of each conductive copper sheet inside the sliding groove is different when the electrode end is bent, so that the contact between the conductive copper sheets is closer and the use is better. Therefore, when there is an error in the copper busbar processing, it can still be installed and used normally, greatly reducing the loss;

[0027] (2) This solution sets up an insulating heat dissipation mechanism and opens heat conduction grooves and heat conduction holes inside the insulating sleeve, so that the heat generated by the copper busbar can spread through the heat conduction holes to the heat conduction grooves and finally dissipate to the outside of the insulating sleeve, thereby achieving a better heat dissipation effect of the copper busbar;

[0028] (3) In this scheme, a heat-shrinkable insulating tube is provided so that the conductive copper sheet is still located on the conductive copper sheet when the conductive copper sheet is extended to the outside of the insulating sleeve, thereby playing an insulating role. The heat-shrinkable insulating tube can also be shrunk by heating so that the heat-shrinkable insulating tube is tightly wrapped around the outside of the conductive copper sheet.

[0029] (4) In the clamping assembly of this solution, when the redundant mechanism is no longer needed after the electrode end is installed, the extension piece is deformed by squeezing the extension piece, so that the groove is deformed and the protrusion is pushed into the clamping groove, thereby preventing the electrode end from extending after installation and making the installation more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the cross-sectional structure of the electrode end of the present invention;

[0033] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0034] Figure 4 For the present invention Figure 2 The enlarged structural diagram at B in the middle;

[0035] Figure 5 It is a partial cross-sectional structural schematic diagram of the copper busbar body and the insulating sleeve of the present invention;

[0036] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point C in the middle.

[0037] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0038] 1. Copper busbar body; 101. Electrode end; 102. Limiting block; 103. Movable slot; 1031. Movable seat; 1032. Conductive copper sheet; 1033. Sliding block; 104. Sliding slot; 105. Heat shrinkable insulating tube; 106. Moving block; 107. Moving slot; 108. Mounting hole; 2. Insulating sleeve; 201. Heat conduction slot; 202. Isolation net; 203. Heat conduction hole; 204. Filter; 3. Extension piece; 301. Groove; 302. Bump; 303. Slot. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 6 The present invention provides a fuel cell copper bar structure and processing technology, including:

[0041] Copper bus body 1

[0042] Electrode ends 101 are provided at both ends of the copper busbar body 1, and mounting holes 108 are provided inside the electrode ends 101. The copper busbar body 1 can be connected to the fuel cell connection end through these mounting holes 108 and fixing bolts. In addition, the electrode end 101 can also be installed on the fuel cell connection end by welding to enhance the stability of the connection.

[0043] A movable groove 103 is provided inside the copper busbar body 1, and a movable seat 1031 is slidably connected inside the movable groove 103. One end of a conductive copper sheet 1032 is fixedly mounted on one end of the movable seat 1031, and the other end is connected to the slide groove 104 inside the electrode end 101 through a sliding block 1033. There are a plurality of conductive copper sheets 1032, which are distributed between the copper busbar body 1 and the electrode end 101 to ensure electrical connection between the two. The sliding block 1033 is fixedly mounted on the other end of the conductive copper sheet 1032, and is slidably connected to the slide groove 104 inside the electrode end 101, so that the conductive copper sheet 1032 can slide freely in the slide groove 104, thereby providing a certain degree of flexibility.

[0044] The insulating sleeve 2 is sleeved on the side wall of the copper busbar body 1 to play the role of isolation and insulation. The insulating heat dissipation mechanism includes an isolation net 202 and a filter 204. The isolation net 202 is fixedly installed inside the insulating sleeve 2 and located inside the heat conduction groove 201 to prevent external impurities from entering the heat conduction groove 201. The filter 204 is fixedly installed inside the insulating sleeve 2 and located inside the heat conduction hole 203 to further filter the air entering the heat conduction hole 203 to keep the interior clean. The side wall of the insulating sleeve 2 is provided with a heat conduction groove 201, and the heat conduction groove 201 is provided with a plurality of heat conduction holes 203 that penetrate the insulating sleeve 2 to promote heat dissipation.

[0045] The copper busbar body 1 has a plurality of stopper blocks 102 fixedly mounted on its side wall, which fit with the heat conducting holes 203 to ensure the correct installation position of the insulating sleeve 2. The extension piece 3 is fixedly mounted on one end of the insulating sleeve 2, and a groove 301 is formed on its inner wall.

[0046] The protrusion 302 is fixedly installed inside the groove 301, and fits in the slot 303 on the side wall of the electrode end 101. The protrusion 302 and the slot 303 are both semicircular, ensuring the stability of the clamping.

[0047] The extension piece 3 is an aluminum metal piece, which has good thermal conductivity and helps to further dissipate heat.

[0048] It should be noted that, when the tolerance of the copper busbar body 1 is large and the electrode end 101 cannot be installed at the fuel cell connection end, the conductive copper sheet 1032 is provided, and the movable seat 1031 is made to slide by pulling the electrode end 101, and the conductive copper sheet 1032 is stretched to the outside of the movable groove 103, so that the electrode end 101 can extend a part, and then the electrode end 101 can be installed at the fuel cell connection end, and the sliding block 1033 and the slide groove 104 are provided so that when the electrode end 101 is bent, one end of each conductive copper sheet 1032 is in a different position inside the slide groove 104, so that the contact between the several conductive copper sheets 1032 is closer and the use is better, so that when there is an error in the copper busbar processing, it can still be installed and used normally, which greatly reduces the loss.

[0049] In some embodiments, see Figure 2 , Figure 4 A movable groove 107 is provided inside the copper busbar body 1, and a movable block 106 is slidably connected inside the movable groove 107. A heat shrinkable insulating tube 105 is fixedly installed at one end of the movable block 106. The heat shrinkable insulating tube 105 is located on one side of the conductive copper sheet 1032, and the other end of the heat shrinkable insulating tube 105 is installed at one end of the electrode end 101. The heat shrinkable insulating tube 105 is arranged so that the conductive copper sheet 1032 is still located on the conductive copper sheet 1032 when it extends to the outside of the insulating sleeve 2, thereby playing an insulating role, and the heat shrinkable insulating tube 105 can also be shrunk by heating it, so that the heat shrinkable insulating tube 105 is tightly wrapped around the outside of the conductive copper sheet 1032.

[0050] By setting the insulating sleeve 2 on the side wall of the copper busbar body 1, an insulating effect can be achieved. By providing a heat-conducting groove 201 and a heat-conducting hole 203 inside the insulating sleeve 2, the heat generated by the copper busbar body 1 can spread to the heat-conducting groove 201 through the heat-conducting hole 203 and finally dissipate to the outside of the insulating sleeve 2, so that the heat dissipation effect of the copper busbar body 1 is better. By setting the isolation net 202, large particles of impurities can be prevented from being stuck in the heat-conducting groove 201. By setting the filter net 204, dust can be prevented from accumulating in the heat-conducting hole 203. By setting the limit block 102, the position of the insulating sleeve 2 can be limited after it is set, so as to prevent the insulating sleeve 2 from sliding freely on the copper busbar body 1.

[0051] Furthermore, by setting the extension piece 3, when the redundant mechanism is no longer needed after the electrode end 101 is installed, the extension piece 3 is deformed by squeezing the extension piece 3, so that the groove 301 is deformed and the protrusion 302 is inserted into the slot 303, thereby avoiding the electrode end 101 from extending after the installation is completed, making the installation more stable.

[0052] The working process and principle of the present invention are as follows: when the tolerance of the copper busbar body 1 is large and the electrode end 101 cannot be installed at the fuel cell connection end, the movable seat 1031 is made to slide by pulling the electrode end 101, and the conductive copper sheet 1032 is stretched to the outside of the movable groove 103, so that the electrode end 101 can be partially extended, and then the electrode end 101 can be installed at the fuel cell connection end. After the installation is completed, the heat shrinkable insulating tube 105 can be shrunk by heating, so that the heat shrinkable insulating tube 105 is tightly wrapped around the outside of the conductive copper sheet 1032, so as to play an insulating role. When the redundant mechanism is no longer needed after the electrode end 101 is installed, the extension member 3 is deformed by squeezing the extension member 3, so that the groove 301 is deformed and the protrusion 302 is inserted into the slot 303, so as to avoid the electrode end 101 from extending after the installation is completed, and to make the installation more stable.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fuel cell copper bar structure, characterized in that: include: A copper busbar body (1), wherein both ends of the copper busbar body (1) are provided with electrode ends (101), a mounting hole (108) is provided inside the electrode end (101), the copper busbar body (1) can be connected to a fuel cell connection end through the mounting hole (108) inside the electrode end (101) and a fixing bolt, and the electrode end (101) can also be mounted on the fuel cell connection end by welding; A redundant mechanism, the redundant mechanism being installed between the inside of the copper busbar body (1) and the inside of the electrode end (101), the redundant mechanism enabling the copper busbar structure to have a certain degree of flexibility when connected to a fuel cell, thereby improving the reliability and stability of the copper busbar structure; An insulating heat dissipation mechanism, the insulating heat dissipation mechanism being arranged on the side wall of the copper busbar body (1), and the insulating heat dissipation mechanism being able to isolate and insulate the copper busbar body (1) by placing an insulating sleeve (2); A snap-on assembly is provided at one end of the insulating heat dissipation mechanism, the snap-on assembly is located on the side wall of the electrode end (101), and the snap-on mechanism can fix the redundant mechanism when it is not in use.

2. A fuel cell copper bar structure according to claim 1, characterized in that: The redundant mechanism comprises a movable seat (1031), a conductive copper sheet (1032) and a sliding block (1033); a movable groove (103) is provided inside the copper busbar body (1); the movable seat (1031) is slidably connected inside the movable groove (103); one end of the conductive copper sheet (1032) is fixedly mounted on one end of the movable seat (1031); a plurality of conductive copper sheets (1032) are provided; the sliding block (1033) is fixedly mounted on the other end of the conductive copper sheet (1032); a sliding groove (104) is provided inside the electrode end (101); and the sliding block (1033) is slidably connected inside the sliding groove (104).

3. A fuel cell copper bar structure according to claim 2, characterized in that: One end of the conductive copper sheet (1032) is slidably connected to the inside of the movable groove (103) via a movable seat (1031), and the other end of the conductive copper sheet (1032) is slidably connected to the inside of the sliding groove (104) via a sliding block (1033).

4. A fuel cell copper bar structure according to claim 2, characterized in that: The conductive copper sheet (1032) is located between the copper busbar body (1) and the electrode end (101), and the copper busbar body (1) and the electrode end (101) are electrically connected via the conductive copper sheet (1032).

5. A fuel cell copper bar structure according to claim 2, characterized in that: A movable groove (107) is provided inside the copper busbar body (1), a movable block (106) is slidably connected inside the movable groove (107), a heat shrinkable insulating tube (105) is fixedly mounted on one end of the movable block (106), and the heat shrinkable insulating tube (105) is located on one side of the conductive copper sheet (1032).

6. A fuel cell copper bar structure according to claim 1, characterized in that: The insulating heat dissipation mechanism comprises an isolation net (202) and a filter net (204); the insulating sleeve (2) is sleeved on the side wall of the copper busbar body (1); the isolation net (202) and the filter net (204) are both fixedly mounted inside the insulating sleeve (2); a heat conduction groove (201) is provided on the side wall of the insulating sleeve (2); the isolation net (202) is located inside the heat conduction groove (201); a plurality of heat conduction holes (203) penetrating the insulating sleeve (2) are provided inside the heat conduction groove (201); and the filter net (204) is located inside the heat conduction holes (203).

7. A fuel cell copper bar structure according to claim 6, characterized in that: A plurality of limit blocks (102) are fixedly mounted on the side wall of the copper busbar body (1), and the plurality of limit blocks (102) fit with the plurality of heat conducting holes (203).

8. A fuel cell copper bar structure according to claim 1, characterized in that: The clamping assembly comprises an extension piece (3) and a protrusion (302); the extension piece (3) is fixedly mounted on one end of the insulating sleeve (2); a groove (301) is provided on the inner wall of the extension piece (3); the protrusion (302) is fixedly mounted inside the groove (301); and a clamping groove (303) is provided on the side wall of the electrode end (101).

9. A fuel cell copper bar structure according to claim 8, characterized in that: The protrusion (302) fits into the slot (303), and both the protrusion (302) and the slot (303) are semicircular.

10. A fuel cell copper bar structure processing process according to any one of claims 1 to 9, characterized in that: The specific steps include: S1: Design drawings according to the data provided by the customer, prepare raw materials: select suitable copper materials as raw materials to ensure that they have good electrical conductivity and mechanical properties; S2: Cutting: Use shearing machine, cutting machine or CNC cutting machine to cut the raw materials into required sizes; S3: Forming: The forming process includes cold pressing, hot pressing, rolling and other methods, and the copper busbar body (1) is processed into a desired shape. During the processing, a movable seat (1031) is installed inside the two ends of the copper busbar body (1) and a plurality of conductive copper sheets (1032) are welded to one end of the movable seat (1031). Then, the other end of the conductive copper sheet (1032) is inserted into and welded to a sliding block (1033) in a sliding groove (104) in the electrode end (101), and a slotting machine is used to open a slot (303) on the side wall of the electrode end (101); S4: A heat conduction groove (201) is formed inside the insulating sleeve (2) using a slotting machine, and then a heat conduction hole (203) is punched out using a hole punching machine. The filter screen (204) is inserted into the heat conduction hole (203), and the isolation net (202) is inserted into the heat conduction groove (201). A groove and a protrusion (302) are formed on the inner wall of the extension piece (3) using a slotting machine, and the extension piece (3) is clamped on one end of the insulating sleeve (2). Finally, the insulating sleeve (2) is sleeved on the side wall of the copper busbar body (1), so that the limit clamping block (102) is located in the heat conduction hole (203), and the leftmost part of the copper busbar structure is completed.

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