Fuel cell copper bar positioning tool structure

Abstract

The utility model discloses a fuel cell copper bar positioning tool structure. The structure comprises a positioning block, a spring, a guide pin, a fixed seat, a feeding and rotating shaft and a feeding button, a guide pin is connected below the positioning block, the guide pin is connected with the fixed seat, and a spring is arranged between the positioning block and the fixed seat; a bolt guide hole is formed in the fixed seat, and a copper bar fixing pin is arranged at the bottom of the positioning block; the bolt guide hole and the copper bar fixing pin are positioned on the same straight line; a feeding and rotating shaft is arranged in the fixing base, and one end of the feeding and rotating shaft is connected to the positioning block. According to the utility model, the problem of difficult electric connection caused by high integration of a fuel cell system is solved.

Description

Technical Field

[0001] The utility model relates to a fuel cell tool, in particular to a fuel cell copper bar positioning tool structure. Background Art

[0002] Fuel cell systems have a volumetric power density, which is the power that a fuel cell can output within a certain volume. This ratio is very important for the entire vehicle. Given a certain volume, the greater the power output of the fuel cell system, the better the vehicle's dynamic performance. For fuel cells, reducing the distance between electrical and fixed connections can reduce costs while also reducing volume occupancy. High integration also brings requirements for component dimensional tolerances and the difficulty of assembly control. As shown below Figure 1 As shown, the stack copper busbar 3 connects to the stack and is fixed to the box 1, while the external copper busbar 4 is fixed to the box cover 2. Once the box and cover are assembled, the electrical connection is internal, and the stack copper busbar 3 and the external copper busbar 4 are screwed together through holes in the box sidewall. If the holes in the two connecting copper busbars do not align due to tolerances (dimensional and assembly tolerances), it will be difficult to drive the bolts. Alternatively, if the electrical connection surface of the copper busbar is cut at an angle during assembly, the contact area will be insufficient, affecting the flow rate.

[0003] Currently, tooling is often not used to solve the problem of difficult assembly. When the threaded holes do not align, tools are used to forcibly correct the position. When the copper busbar mounting surface is beveled, it is forcibly locked by bolts. The current commonly used tooling implementation form is that the mainstream idea is to first locate the position of the battery stack copper busbar before the package is closed (the box and the box cover are fixed) (as shown below Figure 2 Then remove the tooling to package and close the lid. When packaging and closing the lid, install the box cover with the external copper busbar to the designated position (see Figure 1 ), then tighten the bolts. However, this fixture presents a risk: the stress on the copper busbars is released when the positioning fixture is removed, and the busbars may be incorrectly sized and positioned, making assembly difficult. This fixture addresses the size and assembly tolerances of the copper busbars, but it cannot address the tolerances for stress, deformation, and rebound. When connecting the busbars, bolts extend into the box through openings in the side wall. If a bolt accidentally falls off during this process, the box cover and the components above it will need to be removed and reinstalled, which is very risky and costly.

[0004] Fuel cells are constantly pursuing improvements in volumetric power density in terms of performance indicators, which has led to the high integration of components such as fuel cell boxes and all-in-one DCs. In the industry, the high-voltage connections of the stack module and the all-in-one DC integrated inside the fuel cell box are completed by internal screw connections. It is relatively difficult to connect the two internal components through the holes opened on the side of the box. This requires that the connection holes of the two copper busbars are guaranteed to coincide, and the contact surfaces of the copper busbars must be relatively flat with the gap as small as possible. This is difficult to achieve without tooling. Even if some tooling designs are made, it is difficult to achieve smooth assembly due to problems with the tooling functionality. Utility Model Content

[0005] The utility model overcomes the defects of the prior art and provides a fuel cell copper busbar positioning fixture structure. The utility model solves the electrical connection difficulties caused by the high integration of the fuel cell system.

[0006] The technical solution of this utility model is as follows:

[0007] A fuel cell copper busbar positioning fixture structure comprises a positioning block, a spring, a guide pin, a fixing seat, a feed and rotation shaft, and a feed button; a guide pin is connected to the bottom of the positioning block, the guide pin is connected to the fixing seat, and a spring is arranged between the positioning block and the fixing seat; a bolt guide hole is opened inside the fixing seat, and a copper busbar fixing pin is arranged at the bottom of the positioning block; the bolt guide hole and the copper busbar fixing pin are in the same straight line; a feed and rotation shaft is arranged inside the fixing seat, and one end of the feed and rotation shaft is connected to the positioning block.

[0008] Furthermore, the number of the copper busbar fixing pins 8 is 2.

[0009] Furthermore, a fixing base installation hole 12 is formed at the bottom of the fixing base 11 .

[0010] Furthermore, a handle 6 is provided on the top of the positioning block 7 for conveniently fixing the position of the copper busbar.

[0011] Furthermore, the stack copper bar 3 and the external copper bar 4 are fixed to the fixing seat 11 via copper bar fixing pins 8 .

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] 1. The tooling structure of the present invention can be used to position and connect the copper busbar after the package is closed. The tooling can also be disassembled after the copper busbar is fixed without affecting the next assembly step.

[0014] 2. The copper busbar fixing bolts in the utility model have guide holes, so the bolts will not fall into the box, affecting the entire assembly progress, reducing operating costs and controlling assembly risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the copper busbar connection method in the existing technology;

[0016] Figure 2 This is a schematic diagram of the position structure of the copper busbars in the battery stack in the prior art;

[0017] Figure 3 This is a schematic diagram of the structure of the fuel cell copper bar positioning tooling of the utility model;

[0018] Figure 4 Schematic diagram of the position structure of the fuel cell copper busbar positioning tooling.

[0019] The components in the figure are as follows:

[0020] Box body 1, box cover 2, battery stack copper busbar 3, external copper busbar 4, positioning tool 5, handle 6, positioning block 7, copper busbar fixing pin 8, spring 9, guide pin 10, fixing seat 11, fixing seat mounting hole 12, bolt guide hole 13, feed and rotation axis 14, feed button 15. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0022] The utility model provides a fuel cell copper bar positioning tooling structure, such as Figure 3 and Figure 4 As shown, it includes a positioning block 7, a spring 9, a guide pin 10, a fixed seat 11, a feed and rotation shaft 14, and a feed button 15; the guide pin 10 is connected to the bottom of the positioning block 7, and the guide pin 10 is connected to the fixed seat 11, and a spring 9 is provided between the positioning block 7 and the fixed seat 11; a bolt guide hole 13 is provided inside the fixed seat 11, and a copper bar fixing pin 8 is provided at the bottom of the positioning block 7. In this embodiment, the number of copper bar fixing pins 8 is 2. The bolt guide hole 13 and the copper bar fixing pin 8 are in the same straight line; the feed and rotation shaft 14 is provided inside the fixed seat 11, and one end of the feed and rotation shaft 14 is connected to the positioning block 7. The bottom of the fixed seat 11 is provided with a fixed seat mounting hole 12.

[0023] In this embodiment, a handle 6 is provided on the top of the positioning block 7 for conveniently fixing the position of the copper busbar.

[0024] In this embodiment, the stack copper bar 3 and the external copper bar 4 are fixed to the fixing seat 11 via the copper bar fixing pins 8 .

[0025] In this embodiment, the fixing seat 11 is used to fix the entire tooling. After being positioned with the box body 1 through the fixing seat mounting hole 12, the positioning block is fed and rotated through the transmission module (feed and rotation shaft 14 and feed button 15) to send the positioning block to the specified position. Before the packaging and lid are closed, the positioning block 7 can also be operated by pulling the handle and stretching the spring to insert the copper bar fixing pin 8 into the copper bar mounting hole, thereby fixing the copper bar. The positioning block 7 can only be operated through the transmission module after the packaging and lid are closed. When the box cover with the external copper bar is sealed and the external copper bar 4 reaches the specified position (see Figure 4 ), the bolts can be locked through the bolt guide holes 13 on the fixing base 11 to prevent the bolts from falling into the box.

[0026] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A fuel cell copper bar positioning fixture structure, characterized in that: The invention comprises a positioning block (7), a spring (9), a guide pin (10), a fixing seat (11), a feed and rotation shaft (14) and a feed button (15); a guide pin (10) is connected to the bottom of the positioning block (7), the guide pin (10) is connected to the fixing seat (11), and a spring (9) is arranged between the positioning block (7) and the fixing seat (11); a bolt guide hole (13) is opened inside the fixing seat (11), and a copper bar fixing pin (8) is arranged at the bottom of the positioning block (7); the bolt guide hole (13) and the copper bar fixing pin (8) are on the same straight line; a feed and rotation shaft (14) is arranged inside the fixing seat (11), and one end of the feed and rotation shaft (14) is connected to the positioning block (7).

2. A fuel cell copper bar positioning fixture structure according to claim 1, characterized in that: The number of the copper bar fixing pins (8) is 2.

3. A fuel cell copper bar positioning fixture structure according to claim 1, characterized in that: A fixing seat installation hole (12) is provided at the bottom of the fixing seat (11).

4. A fuel cell copper bar positioning fixture structure according to claim 1, characterized in that: A handle (6) for conveniently fixing the position of the copper bar is provided on the top of the positioning block (7).

5. A fuel cell copper bar positioning fixture structure according to claim 1, characterized in that: The stack copper bar (3) and the external copper bar (4) are fixed on the fixing seat (11) via the copper bar fixing pins (8).

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