Quick connecting and locking device for multiple stacks of fuel cells

Abstract

The utility model discloses a quick connecting and locking device for multiple stacks of fuel cells, and belongs to the technical field of equipment of new energy hydrogen fuel cells. The device is used for connecting and locking a plurality of electric piles, and comprises a fixed bracket and a fixed plate which are respectively used for connecting end plates of two adjacent electric piles, and the fixed bracket and the fixed plate realize the connection and locking of the two adjacent electric piles through a locking device; the locking device comprises a connecting rod base and a movably-arranged connecting rod, the connecting rod base is connected with the fixing support and connected and locked with the fixing plate through the connecting rod, a kidney-shaped hole is formed in the connecting rod, a plug screw at the end of the fixing plate is located in the kidney-shaped hole in the locking state, and an adjusting bolt is arranged on the kidney-shaped hole in a penetrating mode. The adjusting bolt is used for adjusting the distance and the gap between the fixing plate and the fixing support. According to the utility model, the double stacks of the fuel cell can be conveniently mounted in the assembly process, and meanwhile, the stress problem caused to the two groups of electric stacks in the vibration process is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to new energy battery technology, and specifically relates to a locking device for a hydrogen fuel cell, in particular to a multi-stack quick connection locking device for fuel cells. Background Art

[0002] At present, most of the hydrogen fuel cell market is small-power single-stack fuel cells. If high-power fuel cells are required for application, the length of the stack will increase exponentially, seriously limiting the installation space of the stack and its packaging in external systems and vehicles and ships. At the same time, if a single-stack shell system is connected in series or parallel, not only will the weight of one more shell and related BOP components be increased, but the production cost of the product will also be increased and the production difficulty will be increased.

[0003] The utility model combines the stack integration technology of large battery stacks, and divides the large battery stack into two modules and integrates them into one shell. While meeting the high power requirements, the longitudinal length of the battery stack is reduced. In terms of cost, only one set of shells is used, and only one set of fuel cell BOP parts is needed when in use, which greatly reduces the cost of the press used for production and the tooling cost of stack packaging. Utility Model Content

[0004] The purpose of the utility model is to provide a fuel cell multi-stack quick connection locking device, which can realize the convenient installation of the fuel cell double stack during the assembly process, and effectively reduce the stress problem caused to the two groups of fuel cells during the vibration process.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions.

[0006] A fuel cell multi-stack quick connection locking device, used for connecting and locking a plurality of fuel cell stacks, comprises a fixing bracket and a fixing plate respectively used for connecting the end plates of two adjacent fuel cell stacks, and the fixing bracket and the fixing plate realize the connection and locking of two adjacent fuel cell stacks through the locking device;

[0007] The locking device includes a connecting rod base and a movably arranged connecting rod. The connecting rod base is connected to the fixed bracket, and the connection and locking are achieved through the connecting rod and the fixed plate. A waist-shaped hole is provided on the connecting rod. The plug screw at the end of the fixed plate is located in the waist-shaped hole in the locked state, and an adjusting bolt is passed through the waist-shaped hole. The adjusting bolt is used to adjust the distance and gap between the fixed plate and the fixed bracket.

[0008] Furthermore, the fixing bracket and the fixing plate are provided with positioning holes and positioning pins for realizing quick alignment and positioning of the fixing bracket and the fixing plate. A wave spring for absorbing vibration and preventing loosening is provided between the fixing bracket and the fixing plate.

[0009] Furthermore, the connecting rod base is connected to the end of the fixing bracket by bolts.

[0010] Furthermore, the end of the fixing bracket is provided with a recess for accommodating the connecting rod base.

[0011] The fixing bracket and the fixing plate are connected to the front end plate or the rear end plate of the fuel cell stack by bolts.

[0012] The fixing bracket comprises a transverse plate provided with a positioning hole and a side plate provided with a recess, and the side plates are located on two side surfaces of the battery stack in a locked state.

[0013] The connecting rod base is provided with a connecting rod through a multi-link structure, and the multi-link structure includes two or more connecting plates, including installing the connecting rod through the connecting plates, and also including bolts for positioning and locking set through the connecting plates.

[0014] Beneficial effects: Compared with the prior art, the fuel cell multi-stack quick connection locking device provided by the utility model has a positioning function, a shock-absorbing effect and a quick installation function, and can be disassembled multiple times with a low risk of thread slippage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the device described in the utility model;

[0016] Figure 2 It is a schematic diagram of the installation of the device of the utility model on two battery stacks;

[0017] Figure 3 It is a schematic diagram of the device of the utility model after two battery stacks are connected and locked. DETAILED DESCRIPTION

[0018] In order to explain the technical solution disclosed by the utility model in detail, a further introduction is given below in conjunction with the accompanying drawings of the specification.

[0019] In order to realize the assembly and installation of a dual fuel cell stack, the prior art almost all uses screws to fix the two stacks to a common bracket, which is a cumbersome process and after multiple disassembly and assembly, the screw threads will also be worn to varying degrees or there is a risk of thread slippage. The utility model provides a dual stack assembly method that is easy to disassemble, assemble and repair, so as to avoid the need to disassemble screws during assembly and maintenance.

[0020] Combination Figure 1As shown, a fast connection locking device for multiple fuel cell stacks includes a fixing bracket 1 and a fixing plate 2. The fixing bracket 1 is composed of a transverse plate and a side plate. The connection between the transverse plate and the side plate is a right angle, thereby meeting the right angle requirement of the stack shell. The transverse plate is provided with a positioning hole and a groove for placing a wave spring 3. The positioning hole is aligned with the positioning hole on the fixing plate 2. The positioning between the fixing bracket 1 and the fixing plate 2 can be achieved by the positioning pin 13. The side plates of the fixing bracket 1 are clamped on the two sides of the stack, and the side plates of the fixing bracket 1 are provided with a recess for accommodating a connecting rod base 5. The fixing bracket 1 is fixed to the front or rear end plate 14 of the stack 9 by bolts, the side plate is fixed to the connecting rod base 5 by bolts, the fixing plate 2 is connected to the rear or front end plate of another group of stacks 9 by bolts, and the end of the fixing plate 2 is provided with a plug screw 4 for realizing the locking of the locking device.

[0021] The locking device includes a connecting rod base 5, which is a plate structure, which is fitted with the side plate, and the connecting rod base 5 is movable ( Figure 1 The position shown can be turned upside down) and a connecting rod 8 is provided, and the connecting rod 8 is used to cooperate with the plug screw 4 to achieve fixation. Then preferably, the utility model has a waist-shaped hole on the connecting rod 8, and the waist-shaped hole is used to be sleeved on the outside of the plug screw 4. To achieve locking, a nut 12 is provided on the top of the waist-shaped hole, and an adjusting bolt 11 is provided through it to adjust the length of the waist-shaped hole. Through the adjusting bolt 11, the plug screw 4 is moved in a direction close to the fixing bracket 1, thereby achieving rapid locking.

[0022] It is further pointed out that the connecting rod base 5 adopts a multi-link structure, that is, a "triangle" connection method, that is, the root of the connecting rod 8 is bulged outward through the connecting plate and then connected. The bulge can also prevent the connecting rod base 5 from affecting the activity of the connecting rod 8. The connecting rod 8 can achieve movement beyond a flat angle, which is convenient for locking operation. In order to further improve stability and release stress, the bottom of the connecting rod 8 is once again connected to the bottom plate of the connecting base 5 through the connecting plate 6, and the root (bottom) of the connecting rod 8 can be extended by one section, thereby setting a bolt hole 7, so that it can be fixed to the bottom plate through the hexagon socket combination screw M8X45 (bolt 10).

[0023] For use, firstly, the fixing bracket 1 and the fixing plate 2 are respectively installed on the front and rear end plates of the two stacks with bolts (such as Figure 2 ), and the end faces of the fixing bracket 1 and the fixing plate 2 are equipped with positioning holes for accurately positioning the battery stack 9; then the wave spring 3 is placed, and after the placement is completed, the battery stack is quickly locked and fixed by the connecting rod 8 (such as Figure 3 ). The wave spring 3 in the device absorbs vibration and prevents the two battery stacks from loosening. At the same time, the fast two-stage device is also equipped with waist-shaped holes, which facilitates installation and solves the error problem caused by the different lengths of the two battery stacks during the battery stacking process.

Claims

1. A fuel cell multi-stack quick connection locking device, used for connecting and locking between fuel cell stacks, characterized in that: It comprises a fixing bracket (1) and a fixing plate (2) for connecting the end plates of two adjacent battery stacks, wherein the fixing bracket (1) and the fixing plate (2) realize the connection and locking of the two adjacent battery stacks through a locking device; The locking device comprises a connecting rod base (5) and a movably arranged connecting rod (8), wherein the connecting rod base (5) is connected to the fixed bracket (1), and the connection and locking are realized with the fixed plate (2) through the connecting rod (8), wherein the connecting rod (8) is provided with a waist-shaped hole, and the plug screw (4) at the end of the fixed plate (2) is located in the waist-shaped hole in the locked state, and an adjusting bolt (11) is passed through the waist-shaped hole, and the adjusting bolt (11) is used to adjust the distance and gap between the fixed plate (2) and the fixed bracket (1).

2. The fuel cell multi-stack quick connection locking device according to claim 1, characterized in that: The fixed bracket (1) and the fixed plate (2) are provided with positioning holes and positioning pins (13) for realizing rapid alignment and positioning of the fixed bracket (1) and the fixed plate (2).

3. The fuel cell multi-stack quick connection locking device according to claim 1 or 2, characterized in that: A wave spring (3) for absorbing vibration and preventing loosening is provided between the fixed bracket (1) and the fixed plate (2).

4. The fuel cell multi-stack quick connection locking device according to claim 1, characterized in that: The connecting rod base (5) is connected to the end of the fixing bracket (1) via bolts.

5. The fuel cell multi-stack quick connection locking device according to claim 1, characterized in that: The end of the fixing bracket (1) is provided with a recessed portion for accommodating a connecting rod base (5).

6. The fuel cell multi-stack quick connection locking device according to claim 1, characterized in that: The fixing bracket (1) and the fixing plate (2) are both connected to the front end plate or the rear end plate of the fuel cell stack via bolts.

7. The fuel cell multi-stack quick connection locking device according to claim 1, characterized in that: The fixing bracket (1) comprises a transverse plate provided with a positioning hole and a side plate provided with a recess, and the side plates are located on two side surfaces of the battery stack in a locked state.

8. The fuel cell multi-stack quick connection locking device according to claim 1, characterized in that: The connecting rod base (5) is provided with a connecting rod (8) through a multi-link structure, and the multi-link structure includes two or more connecting plates (6), including installation of the connecting rod (8) through the connecting plates (6), and also including bolts (10) for positioning and locking provided through the connecting plates (6).

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