Connection Structure between Stack and Fuel Cell CVM Module and Stack Assembly

Abstract

The present invention discloses a connection structure between a stack and a fuel cell CVM module and a stack assembly; the connection structure between the stack and the fuel cell CVM module includes a wire harness bracket for being fixed to the stack. The stack includes multiple single cells, and each single cell is provided with a battery clamping structure and a conductive slot. The wire harness bracket is provided with a bracket clamping structure for clamping with the battery clamping structure; a plurality of wire harness plugs for respectively fixing the wire harnesses of the fuel cell CVM module and realizing electrical connection between the wire harnesses and the single cells. The wire harness plugs are arranged on the wire harness bracket and are provided with conductive parts inserted into the conductive slots. When detecting the fuel cell CVM module, the wire harnesses are respectively fixed on the wire harness bracket by using the wire harness plugs of the connection structure of the present invention, and the wire harness bracket is clamped and fixed with the stack, so as to realize effective and stable connection between the wire harnesses and the single cells, thereby improving the detection reliability of the voltage of a single cell, and at the same time, being able to avoid damaging the stack due to stack short circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of stack detection, and more specifically, to a connection structure between a stack and a fuel cell CVM module. The present invention also relates to a stack assembly. Background Art

[0002] A fuel cell stack is composed of dozens or hundreds of single cells. During the operation of the stack, it is necessary to ensure that the operation status of each single cell is normal to ensure a normal output voltage. However, when each single cell is operating, it is necessary to detect whether the voltage is normal through a fuel cell CVM (abbreviation for Cell Voltage Monitor) module at all times. When detecting, it is necessary to connect the wires needed for detection to each single cell or every few single cells. The wires are generally temporarily fixed using cable ties or tape. There are a large number of wires, and it is easy to loosen or fall off, which may lead to the inability to detect the single cell or cause a short circuit in the stack, thereby damaging the stack.

[0003] In addition, due to the unreliable fixation of the wires, the fuel cell CVM module only detects the voltage of a single fuel cell of the stack during the pre - factory test stage and cannot detect the voltage of a single cell of the stack at all times after installation, so it cannot ensure whether the stack is in a normal usage condition. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to disclose a connection structure between a stack and a fuel cell CVM module to improve the detection reliability of the voltage of a single cell and avoid damaging the stack at the same time.

[0005] Another purpose of the present invention is to disclose a stack assembly having the above - mentioned connection structure between the stack and the fuel cell CVM module.

[0006] To achieve the above - mentioned purpose, the present invention discloses the following technical solutions:

[0007] A connection structure between a stack and a fuel cell CVM module, comprising:

[0008] A wire harness bracket for being fixed to the stack. The stack includes multiple single cells, and each single cell is provided with a battery clamping structure and a conductive slot. The wire harness bracket is provided with a bracket clamping structure for clamping with the battery clamping structure;

[0009] Multiple wire harness plugs for fixing the wire harnesses of the fuel cell CVM module one by one and realizing the electrical connection between the wire harnesses and the single cells. The wire harness plugs are arranged on the wire harness bracket and are provided with conductive parts inserted into the conductive slots.

[0010] Preferably, in the above connection structure, there is at least one wire harness bracket, and the bracket clamping structure of one wire harness bracket can be clamped with the battery clamping structures on multiple single cells.

[0011] Preferably, in the above connection structure, the bracket clamping structure includes a clamping protrusion, and the battery clamping structure includes a clamping groove provided on the single cell.

[0012] Preferably, in the above connection structure, there are two clamping protrusions, which can be respectively fixed on two intersecting faces of the stack.

[0013] Preferably, in the above connection structure, the clamping protrusion is a hook-shaped protrusion, and the clamping groove is a rectangular groove.

[0014] Preferably, in the above connection structure, the wire harness bracket can be deformed to separate the bracket clamping structure from the battery clamping structure, and a disassembly and assembly handle for promoting deformation is provided on the surface of the wire harness bracket away from the battery clamping structure.

[0015] Preferably, in the above connection structure, a plug insertion through hole is provided on the wire harness bracket;

[0016] The wire harness plug includes:

[0017] A wire harness clamping part inserted into the plug insertion through hole, and a wire perforation for the wire harness to pass through is provided on the wire harness clamping part;

[0018] A metal conductive sheet fixedly connected to the wire harness clamping part, the metal conductive sheet is used for welding with the wire harness and can be in interference fit with the conductive slot.

[0019] Preferably, in the above connection structure, the metal conductive sheet is a corrugated conductive sheet with three bending parts.

[0020] Preferably, in the above connection structure, the conductive slot is a rectangular groove, and the plug insertion through hole is a rectangular hole.

[0021] It can be seen from the above technical solutions that the connection structure of the stack and the fuel cell CVM module disclosed in the present invention is used to connect the stack and the fuel cell CVM module. The stack includes multiple single cells, and each single cell is provided with a battery clamping structure and a conductive slot.

[0022] The connection structure includes a wire harness bracket for fixing on the stack, and the wire harness bracket is provided with a bracket clamping structure for clamping with the battery clamping structure; multiple wire harness plugs for respectively fixing the wire harnesses of the fuel cell CVM module and realizing the electrical connection between the wire harnesses and the single cells. The wire harness plugs are arranged on the wire harness bracket and are provided with conductive parts inserted into the conductive slots.

[0023] During application, use the wire harness connectors to fix the wire harness of the fuel cell CVM module one by one; connect the bracket clamping structure of the wire harness bracket with the battery clamping structure of the stack. While clamping, ensure that the conductive part of the wire harness connector is inserted into the corresponding conductive slot, so as to effectively fix the wire harness bracket on the stack and electrically connect the wire harness to the single cell.

[0024] When detecting the fuel cell CVM module, use the wire harness connectors of the connection structure of the present invention to fix the wire harness on the wire harness bracket one by one, and the wire harness bracket is clamped and fixed to the stack, so as to realize an effective and stable connection between the wire harness and the single cell, thereby improving the detection reliability of the single cell voltage, and at the same time being able to avoid damaging the stack due to stack short circuit.

[0025] In addition, since the connection structure can realize the reliable fixation of the wire harness, the fuel cell CVM module can detect the voltage of each single cell of the stack (before leaving the factory and after being installed in the vehicle) at any time, better ensure the normal operation of the stack, and avoid damage and attenuation of the stack.

[0026] The present invention also discloses a stack assembly, including a stack and a connection structure provided on the stack for connecting with the wire harness of the fuel cell CVM module. The connection structure is any one of the above connection structures between the stack and the fuel cell CVM module. Since the above connection structure between the stack and the fuel cell CVM module has the above effects, the stack assembly with the above connection structure has the same effects, so it will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a three-dimensional structural schematic diagram when the connection structure between the stack and the fuel cell CVM module disclosed in the embodiment of the present invention is applied;

[0029] Figure 2 It is a sectional view when the connection structure between the stack and the fuel cell CVM module disclosed in the embodiment of the present invention is applied;

[0030] Figure 3 It is a three-dimensional structural schematic diagram of the wire harness bracket disclosed in the embodiment of the present invention;

[0031] Figure 4 It is a three-dimensional structural schematic diagram of the wire harness bracket in another direction disclosed in the embodiment of the present invention;

[0032] Figure 5It is a schematic three-dimensional structure diagram of the stack disclosed in an embodiment of the present invention;

[0033] Figure 6 It is a schematic three-dimensional structure diagram of the wire harness plug-in disclosed in an embodiment of the present invention;

[0034] Figure 7 It is a schematic diagram of the mating structure between the conductive part of the wire harness plug-in and the conductive slot of the single cell disclosed in an embodiment of the present invention. Detailed implementation manners

[0035] An embodiment of the present invention discloses a connection structure between a stack and a fuel cell CVM module, which can improve the detection reliability of the voltage of a single cell and avoid damaging the stack.

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to the attached Figure 1-7 , a connection structure between a stack and a fuel cell CVM module disclosed in an embodiment of the present invention is used to connect the stack and the fuel cell CVM module. The stack includes multiple single cells 1, and each single cell 1 is provided with a battery clamping structure 11 and a conductive slot 12.

[0038] The connection structure includes a wire harness bracket 2 for fixing on the stack. The wire harness bracket 2 is provided with a bracket clamping structure 23 for clamping with the battery clamping structure 11; multiple wire harness plug-ins 4 for fixing the wire harnesses 3 of the fuel cell CVM module one by one and realizing the electrical connection between the wire harnesses 3 and the single cells 1. The wire harness plug-ins 4 are arranged on the wire harness bracket 2 and are provided with conductive parts inserted into the conductive slots 12.

[0039] It should be noted that since the fuel cell CVM module needs to detect the voltage of each single cell 1 on the stack, the number of wire harnesses 3 is equivalent to the number of single cells 1. Then, the number of wire harness plug-ins 4 for fixing the wire harnesses 3, the conductive slots 12 and the single cells 1 that cooperate with the conductive parts of the wire harness plug-ins 4 are all the same.

[0040] The wire harness bracket 2 is made of a non-metallic insulating material and has no conductive phenomenon itself; the electrical connection between the wire harness 3 and the single cell 1 is realized through the wire harness plug-in 4.

[0041] Such as Figure 5As shown in the figure, in the present invention, a conductive slot 12 is processed on the single cell 1 of the stack as an access port for the detection harness 3, and the conductive part in the harness plug 4 is inserted into the conductive slot 12 to connect the CVM harness 3 and the single cell 1. A battery clamping structure 11 is processed on the single cell 1 for clamping and cooperating with the harness bracket 2.

[0042] As Figure 1-2 shown, during application, the harness 3 of the fuel cell CVM module is fixed one by one by using the harness plug 4; the bracket clamping structure 23 of the harness bracket 2 is clamped with the battery clamping structure 11 of the stack, and at the same time, it is ensured that the conductive part of the harness plug 4 is inserted into the corresponding conductive slot 12, so that the harness bracket 2 is effectively fixed on the stack and the harness 3 is electrically connected to the single cell 1, effectively avoiding the loosening of the harness 3.

[0043] During the detection of the fuel cell CVM module, the harness 3 is fixed on the harness bracket 2 one by one by using the harness plug 4 of the connection structure of the present invention, and the harness bracket 2 is clamped and fixed with the stack, so as to realize the effective and stable connection between the harness 3 and the single cell 1, thereby improving the detection reliability of the single cell voltage, and at the same time, it can avoid damaging the stack due to stack short circuit.

[0044] In addition, since the connection structure can realize the reliable fixation of the harness 3, the fuel cell CVM module can detect the voltage of each single cell 1 of the stack at all times (before leaving the factory and after being installed in the vehicle), better ensuring the normal operation of the stack and avoiding the damage and attenuation of the stack.

[0045] Preferably, there is at least one harness bracket 2, and the bracket clamping structure 23 of one harness bracket 2 can be clamped with the battery clamping structures 11 on multiple single cells 1. By clamping and fixing one harness bracket 2 with multiple single cells 1 at the same time, the present invention improves the fixing strength between the two; the stack is composed of dozens or hundreds of single cells 1, and the entire stack can be realized by using several harness brackets 2 and connecting them to the stack for voltage detection of all single cells 1; in addition, with the development of the fuel cell industry, high-power stack products will be gradually developed, and the number of single cells 1 in the fuel cell will increase. By only increasing the number of harness brackets 2 without changing their structures for assembly, the structure is effectively simplified, the assembly efficiency is increased, and the development of the harness brackets 2 is also saved.

[0046] In order to improve the connection strength between the harness bracket 2 and the stack, multiple harness brackets 2 can also be clamped and cooperated with each other. The harness bracket 2 can also be one, and it is clamped and cooperated with all the single cells 1 at the same time.

[0047] As Figure 4-5As shown, in order to simplify the structure, the bracket clamping structure 23 includes a clamping protrusion, and the battery clamping structure 11 includes a clamping groove provided on the single battery 1. In this embodiment, a clamping groove is formed on the single battery 1 and is clamped and fixed with the clamping protrusion on the wiring harness bracket 2; it can be understood that the bracket clamping structure 23 may also include a buckle, and the battery clamping structure 11 includes a protrusion provided on the single battery 1, and the buckle can be clamped and fixed with the protrusion.

[0048] In a further technical solution, there are two clamping protrusions, which can be respectively fixed on two intersecting surfaces of the fuel cell stack. Correspondingly, clamping grooves are respectively provided on two intersecting surfaces of the fuel cell stack, and the wiring harness bracket 2 is clamped on the fuel cell stack through the one-to-one cooperation between the clamping groove and the clamping protrusion; since the wiring harness bracket 2 is clamped and fixed to both surfaces of the fuel cell stack, the fixing strength of the wiring harness bracket 2 is improved. It can be understood that the clamping protrusion can also be fixed on the same surface of the fuel cell stack. The number of clamping protrusions can also be other numbers, such as one or three, etc.

[0049] In order to simplify the structure, the clamping protrusion is a hook-shaped protrusion, and the clamping groove is a rectangular groove, as Figure 2 shown. After the hook-shaped protrusion is inserted into the rectangular groove, it can form a hooking effect with the rectangular groove to realize the clamping and fixing of the two.

[0050] As Figure 5 shown, rectangular grooves are added to both surfaces of each single battery 1. After several single batteries 1 are assembled, an integral clamping groove can be formed to clamp and fix the wiring harness bracket 2.

[0051] Of course, the clamping protrusion can also be a rectangular protrusion, a circular protrusion, etc. The rectangular groove can also be an arc-shaped groove or a trapezoidal groove with a wider bottom and a narrower top.

[0052] For the convenience of disassembly and assembly, the wiring harness bracket 2 can be deformed to enable the bracket clamping structure 23 to disengage from the battery clamping structure 11, and a disassembly and assembly handle 21 for promoting deformation is provided on the surface of the wiring harness bracket 2 away from the battery clamping structure 11.

[0053] In this embodiment, the wiring harness bracket 2 is a plastically deformable member. By pressing the disassembly and assembly handle 21, the bracket clamping structure 23 is driven to deform, and the hook-shaped protrusion can be inserted into or disengaged from the rectangular groove, facilitating the disassembly and assembly of the wiring harness bracket 2.

[0054] Specifically, the disassembly and assembly handle 21 is provided at one end of the horizontal plane of the wiring harness bracket 2 and corresponds to the position of the hook-shaped protrusion. Of course, it can also be provided on the vertical surface of the wiring harness bracket 2.

[0055] It can be understood that the wiring harness bracket 2 of the present application may also not be deformable and is disassembled by means of a disassembly tool.

[0056] For the convenience of fixing the wiring harness 3, plug insertion through holes 22 are provided on the wiring harness bracket 2, asFigure 3 As shown in the figure; the wire harness plug 4 includes a wire harness clamping portion 42 inserted into the plug insertion through hole 22. The wire harness clamping portion 42 is provided with a wire harness 3 through hole for the wire harness 3 to pass through; a metal conductive sheet 41 fixedly connected to the wire harness clamping portion 42. The metal conductive sheet 41 is used for welding with the wire harness 3 and can be in interference fit with the conductive slot 12, as Figure 6 shown.

[0057] During application, first, the wire harness 3 is passed through the wire harness 3 through hole on the wire harness clamping portion 42, and the wire harness 3 is welded to the metal conductive sheet 41. In order to ensure the effectiveness of the electrical connection between the two, a sleeve for fixing the wire harness 3 is provided at one end of the metal conductive sheet 41 close to the wire harness clamping portion 42, and the wire harness 3 is welded to the sleeve; then, the wire harness plug 4 together with the wire harness 3 is inserted into the plug insertion through hole 22 of the wire harness bracket 2, the wire harness plug 4 is clamped on the wire harness bracket 2, and the metal conductive sheet 41 is fixed on the stack by interference fit with the conductive slot 12 of the stack.

[0058] The wire harness plug 4 of this embodiment is detachably connected to the wire harness bracket 2, which is convenient for the disassembly and assembly of the wire harness 3; of course, the wire harness plug 4 and the wire harness bracket 2 can also be non-detachable. The present application can also use a conductive post as the conductive part of the wire harness plug 4.

[0059] The metal conductive sheet 41 is a waveform conductive sheet with three bending parts. As Figure 7 shown, the waveform conductive sheet of the present application has good elasticity and can be in elastic contact with the conductive slot 12, improving the electrical connection reliability between the wire harness 3 and the stack. Alternatively, the metal conductive sheet 41 can also be V-shaped, U-shaped, semi-circular arc-shaped, etc.

[0060] In order to further simplify the structure, the conductive slot 12 is a rectangular slot, and the plug insertion through hole 22 is a rectangular hole. By opening a rectangular slot on the stack to clamp the metal conductive sheet 41 of the wire harness plug 4, it is convenient for disassembly and assembly. The conductive slot 12 can also be circular, hexagonal, etc.

[0061] The embodiment of the present invention also discloses a stack assembly, including a stack and a connection structure provided on the stack and used for connecting with the wire harness 3 of the fuel cell CVM module. The connection structure is the connection structure between the stack and the fuel cell CVM module provided in any one of the above embodiments, which can improve the detection reliability of the single cell voltage and avoid damaging the stack at the same time. Its advantages are brought by the connection structure between the stack and the fuel cell CVM module. For specific details, please refer to the relevant parts in the above embodiments and will not be elaborated here.

[0062] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other.

[0063] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connection structure between a stack and a fuel cell CVM module, characterized in that, Including: A wire harness bracket (2) for fixing on a stack, the stack includes multiple single cells (1), each single cell (1) is provided with a battery clamping structure (11) and a conductive slot (12), and the wire harness bracket (2) is provided with a bracket clamping structure (23) for clamping with the battery clamping structure (11); Multiple wire harness plugs (4) for fixing the wire harness (3) of the fuel cell CVM module one by one and realizing the electrical connection between the wire harness (3) and the single cell (1), the wire harness plugs (4) are arranged on the wire harness bracket (2) and are provided with conductive parts inserted into the conductive slots (12); The bracket clamping structure (23) includes a clamping protrusion, and the battery clamping structure (11) includes a clamping groove arranged on the single cell (1); There are two clamping protrusions, which can be respectively fixed on two intersecting surfaces of the stack; The clamping protrusion is a hook-shaped protrusion, and the clamping groove is a rectangular groove; The wire harness plug (4) is detachably connected to the wire harness bracket (2); a plug insertion through hole (22) is arranged on the wire harness bracket (2); The wire harness plug (4) includes: A wire harness clamping part (42) inserted into the plug insertion through hole (22), and the wire harness clamping part (42) is provided with a wire harness (3) through hole for the wire harness (3) to pass through; A metal conductive sheet (41) fixedly connected to the wire harness clamping part (42), the metal conductive sheet (41) is used for welding with the wire harness (3) and can be in interference fit with the conductive slot (12).

2. The connection structure according to claim 1, wherein There is at least one wire harness bracket (2), and the bracket clamping structure (23) of one wire harness bracket (2) can be clamped with the battery clamping structures (11) on multiple single cells (1).

3. The connection structure according to claim 1, characterized in that, The wire harness bracket (2) can realize the separation of the bracket clamping structure (23) from the battery clamping structure (11) through deformation, and a disassembly and assembly handle (21) for promoting deformation is arranged on the surface of the wire harness bracket (2) away from the battery clamping structure (11).

4. The connection structure according to claim 1, characterized in that The metal conductive sheet (41) is a corrugated conductive sheet with three bending parts.

5. The connection structure according to claim 4, characterized in that, The conductive slot (12) is a rectangular groove, and the plug insertion through hole (22) is a rectangular hole.

6. A stack assembly, comprising a stack and a connection structure disposed on the stack and used for connecting with a wire harness (3) of a fuel cell CVM module, wherein, The connection structure is the connection structure between the stack and the fuel cell CVM module as described in any one of claims 1-5.

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