An easy-to-assemble safety stack housing

Abstract

This invention relates to an easily assembled safety-type fuel cell stack housing, comprising a housing, a front end plate located on the front side of the housing, a rear end plate located on the rear side of the housing, and multiple bolts. Screw holes are provided on both the front and rear sides of the top surface of the housing. A front snap-fit ​​component is located at the bottom of the front side of the housing, and a rear snap-fit ​​component is located at the bottom of the rear side of the housing. The bottom end of the front end plate has a front snap-fit ​​groove that mates with the front snap-fit ​​component. Multiple front mounting components are located on the top surface of the front end plate. The bottom of the rear end plate has a rear snap-fit ​​groove that mates with the rear snap-fit ​​component, and the top surface of the rear end plate has multiple rear mounting components. The bottom of the front end plate is connected to the front snap-fit ​​component via the front snap-fit ​​groove. The front mounting components are fixedly connected to the housing via bolts and screw holes. The bottom of the rear end plate is connected to the rear snap-fit ​​component via the rear snap-fit ​​groove. The rear mounting components are fixedly connected to the housing via bolts and screw holes. Compared with the prior art, this invention has advantages such as high safety and convenient installation.

Description

Technical Field

[0001] This invention relates to the field of fuel cell stack equipment, and in particular to an easy-to-assemble safety fuel cell stack housing. Background Technology

[0002] As an energy supply source, the fuel cell stack is one of the most important assemblies in a vehicle's powertrain. The individual electrode units within the stack are connected in series to supply voltage to the vehicle. As the power input source, the individual electrode units are sealed off from each other by the encapsulation and compression of the stack's outer casing. Therefore, theoretically, from a stress analysis perspective, the stack's outer casing is subjected to a reverse external support load from the internal core, and the front and rear end plates are also subjected to a reverse external support load from the core. The front and rear end plates and the casing are primarily connected by several sets of bolts.

[0003] Traditional fuel cell stack housings currently use a box-type design, such as... Figure 1 As shown, the casing is encapsulated with front and rear end plates, which are pre-tightened and fixed with multiple sets of M6 bolts. The entire fuel cell stack core is adjusted by the adjusting nut at the rear end to achieve a sealing effect between the core electrode units. Therefore, the entire fuel cell stack is subjected to extremely high expansion forces from the core, which react on the entire box-type casing and the front and rear end plates. The casing, through multiple sets of M6 bolts, holds the front and rear end plates together, overcoming the extremely high encapsulation load force, pressing down on the internal core, and ensuring the working conditions of the internal system. The two sets of bolts bear the load from the fuel cell stack encapsulation. Generally, for strength and rigidity requirements, fuel cell stacks exceeding 100KW require at least 20 M6 bolts to reinforce the rear end plate and at least 16 M6 bolts to connect the front end plate. The tension and tightening of the bolts bear the load of the assembly of two extremely important functional safety components. This is not only very complex in terms of process and assembly procedures, but also has high economic costs. In addition, fuel cell stacks are mostly used in vehicle environments, which are sometimes subject to very severe vibrations. The excessive use of bolts to fasten important structural components can lead to bolts loosening or even falling off during random vibrations. Sometimes, the loosening of one bolt can cause the loosening of surrounding bolts, and the failure of one bolt can lead to the failure and scrapping of the entire stack. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of the prior art and provide an easy-to-assemble safety stack housing.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An easily assembled safety-type fuel cell stack housing includes a housing, a front end plate located on the front side of the housing, a rear end plate located on the rear side of the housing, and multiple bolts.

[0007] The top surface of the housing has screw holes on both the front and rear sides. The bottom of the front side of the housing has a front snap-fit ​​component, and the bottom of the rear side of the housing has a rear snap-fit ​​component. The bottom end of the front panel has a front slot that mates with the front snap-fit ​​component. The top surface of the front panel has multiple front mounting parts. The bottom of the rear panel has a rear slot that mates with the rear snap-fit ​​component, and the top surface of the rear panel has multiple rear mounting parts.

[0008] The bottom of the front end plate is connected to the front mounting piece via a front slot, and the front mounting piece is fixedly connected to the housing via bolts and screw holes. The bottom of the rear end plate is connected to the rear mounting piece via a rear slot, and the rear mounting piece is fixedly connected to the housing via bolts and screw holes.

[0009] Preferably, both the front mounting component and the rear mounting component are flanges, and the flanges are provided with through holes for inserting bolts.

[0010] Preferably, the top surface of the housing is further provided with a plurality of positioning reinforcements, the positioning reinforcements being provided on the periphery of the screw hole to form a positioning groove, and the front mounting part and the rear mounting part being engaged in the positioning groove.

[0011] Preferably, the top surface of the housing is provided with a plurality of positioning groove reinforcing ribs, and the two ends of the positioning groove reinforcing ribs are respectively fixedly connected to the positioning reinforcing member on the front side of the top surface of the housing and the positioning reinforcing member on the rear side of the top surface of the housing.

[0012] Preferably, the top surface of the shell is provided with a ring-shaped reinforcing rib, which is arranged around the periphery of the top surface of the shell.

[0013] Preferably, the front and rear latching components are pull hooks.

[0014] Preferably, the front slot is located at the bottom front side of the front end plate, and the rear slot is located at the bottom rear side of the rear end plate.

[0015] Preferably, the number of front snap-fit ​​components provided on the housing is greater than or equal to two, and the number of rear snap-fit ​​components provided on the housing is greater than or equal to two.

[0016] Preferably, the number of screw holes on the front side of the top surface of the housing is greater than or equal to two, and the number of screw holes on the rear side of the top surface of the housing is greater than or equal to two.

[0017] Preferably, the bolt is an M6 bolt.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1) The front and rear plates of the housing of the present invention are connected and bolted by front mounting parts, rear mounting parts, front snap-fit ​​parts, and rear snap-fit ​​parts. The snap-fit ​​parts and slots are used to transfer and overcome the encapsulation load force. The mounting parts are connected to the top surface of the housing by bolts. The shear stress resistance of the bolts is often better than the tensile strength. The shear deformation resistance of the bolts is used to overcome the encapsulation load force of the fuel cell stack, effectively improving the connection strength of the equipment and avoiding the risk of bolts loosening and falling off under vehicle vibration conditions. The safety and reliability are high.

[0020] 2) The installation method of the present invention is simple and quick to operate, which can reduce many tedious processing details and reduce processing and production costs; it can reduce the weight of the fuel cell stack and achieve the existing product performance with a smaller mass; it can simplify the production and assembly process and complete the product assembly with fewer production processes; it can be easily disassembled and maintained, and facilitates various tests and inspections. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the existing fuel cell stack casing.

[0022] Figure 2 This is a schematic diagram of the structure of the fuel cell stack housing of the present invention;

[0023] Figure 3 This is a cross-sectional schematic diagram of the fuel cell stack housing of the present invention;

[0024] Figure 4 This is a schematic cross-sectional view of the fuel cell stack housing after assembly.

[0025] Among them, 1. Housing, 101. Front snap-fit ​​component, 102. Rear snap-fit ​​component, 103. Positioning reinforcement component, 104. Positioning groove, 105. Positioning groove reinforcement rib, 106. Ring reinforcement rib, 2. Front end plate, 201. Front snap-fit ​​groove, 202. Front mounting component, 3. Rear end plate, 301. Rear snap-fit ​​groove, 302. Rear mounting component, 4. Bolt, 5. Screw hole, 6. Through hole. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Note that the following description of the embodiments is merely illustrative and is not intended to limit its applicability or use, nor is the present invention limited to the following embodiments.

[0027] Example

[0028] An easily assembled safety stack housing, such as Figures 2-4As shown, the device includes a housing 1, a front end plate 2 located on the front side of the housing 1, a rear end plate 3 located on the rear side of the housing 1, and multiple bolts 4. Screw holes 5 are provided on both the front and rear sides of the top surface of the housing 1. A front snap-fit ​​component 101 is provided at the bottom of the front side of the housing 1, and a rear snap-fit ​​component 102 is provided at the bottom of the rear side of the housing 1. The bottom end of the front end plate 2 has a front snap-fit ​​groove 201 that mates with the front snap-fit ​​component 101. Multiple front mounting components 202 are provided on the top surface of the front end plate 2. The bottom of the rear end plate 3 has a rear snap-fit ​​groove 301 that mates with the rear snap-fit ​​component 102, and multiple rear mounting components 302 are provided on the top surface of the rear end plate 3.

[0029] The bottom of the front panel 2 is connected to the front mounting member 101 via the front slot 201, and the front mounting member 202 is fixedly connected to the housing 1 via bolts 4 and screw holes 5. The bottom of the rear panel 3 is connected to the rear mounting member 102 via the rear slot 301, and the rear mounting member 302 is fixedly connected to the housing 1 via bolts 4 and screw holes 5. The specific structure of each component in this embodiment is as follows:

[0030] Both the front mounting part 202 and the rear mounting part 302 have flanges, and through holes 6 are provided on the flanges for inserting bolts 4. Multiple positioning reinforcements 103 are also provided on the top surface of the housing 1. The positioning reinforcements 103 are located around the screw holes 5 to form positioning grooves 104, and the front mounting part 202 and the rear mounting part 302 are engaged within the positioning grooves 104. In this embodiment, the bolts 4 are M6 bolts 4, and the screw holes 5 and through holes 6 are adapted to the shape of the bolts 4.

[0031] To further enhance the connection strength, the top surface of the housing 1 is provided with multiple positioning groove reinforcing ribs 105. The two ends of the positioning groove reinforcing ribs 105 are fixedly connected to the positioning reinforcing member 103 on the front side of the top surface of the housing 1 and the positioning reinforcing member 103 on the rear side of the top surface of the housing 1, respectively. The top surface of the housing 1 is provided with a ring reinforcing rib 106, which is arranged around the periphery of the top surface of the housing 1.

[0032] In this embodiment, the front latch 101 and the rear latch 102 are hooks. In conjunction with the hook structure, the front latch 201 is formed on the front side of the bottom end of the front end plate 2, and the rear latch 301 is formed on the rear side of the bottom end of the rear end plate 3.

[0033] To ensure the strength of the installation connection between the front end plate 2, the rear end plate 3, and the housing 1, the housing 1 has at least two front snap-fit ​​connectors 101 and at least two rear snap-fit ​​connectors 102. The housing 1 has at least two screw holes 5 on the front side of its top surface and at least two screw holes 5 on the rear side of its top surface. In this embodiment, the housing 1 has two front snap-fit ​​connectors 101 and two rear snap-fit ​​connectors 102, and two screw holes 5 are respectively provided on the front and rear sides of the top of the housing 1 for assembly.

[0034] The front end plate 2 and rear end plate 3 of the present invention are installed and fixed to the housing 1 by means of flange structure and bolts 4. The bolts 4 are used to resist shear force instead of the traditional method of using bolts 4 to predict tensile strength. The shear resistance of bolts 4 is better than the tensile performance.

[0035] The above embodiments are merely illustrative and do not constitute a limitation on the scope of the present invention. These embodiments can also be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the technical spirit of the present invention.

Claims

1. An easily assembled safety-type fuel cell stack housing, characterized in that, It includes a housing (1), a front end plate (2) located on the front side of the housing (1), a rear end plate (3) located on the rear side of the housing (1), and multiple bolts (4). The top surface of the housing (1) is provided with screw holes (5) on the front and rear sides. The bottom of the front side of the housing (1) is provided with a front snap-fit ​​(101) and the bottom of the rear side of the housing (1) is provided with a rear snap-fit ​​(102). The bottom end of the front plate (2) is provided with a front snap-fit ​​groove (201) that cooperates with the front snap-fit ​​(101). The top surface of the front plate (2) is provided with multiple front mounting parts (202). The bottom of the rear plate (3) is provided with a rear snap-fit ​​groove (301) that cooperates with the rear snap-fit ​​(102). The top surface of the rear plate (3) is provided with multiple rear mounting parts (302). The bottom of the front plate (2) is connected to the front connector (101) via the front slot (201), and the front mounting part (202) is fixedly connected to the housing (1) via bolts (4) and screw holes (5). The bottom of the rear plate (3) is connected to the rear connector (102) via the rear slot (301), and the rear mounting part (302) is fixedly connected to the housing (1) via bolts (4) and screw holes (5). Both the front mounting part (202) and the rear mounting part (302) are flanged, and the flanges are provided with through holes (6) for inserting bolts (4). The top surface of the housing (1) is also provided with a plurality of positioning reinforcements (103). The positioning reinforcements (103) are provided on the periphery of the screw hole (5) to form a positioning groove (104). The front mounting part (202) and the rear mounting part (302) are engaged in the positioning groove (104). The top surface of the housing (1) is provided with a plurality of positioning groove reinforcing ribs (105), and the two ends of the positioning groove reinforcing ribs (105) are respectively fixedly connected to the positioning reinforcing member (103) on the front side of the top surface of the housing (1) and the positioning reinforcing member (103) on the rear side of the top surface of the housing (1). The top surface of the shell (1) is provided with a ring reinforcing rib (106), which is arranged around the periphery of the top surface of the shell (1).

2. The easily assembled safety-type fuel cell stack housing according to claim 1, characterized in that, The front snap fastener (101) and the rear snap fastener (102) are hooks.

3. The easily assembled safety-type fuel cell stack housing according to claim 2, characterized in that, The front slot (201) is located at the bottom front side of the front end plate (2), and the rear slot (301) is located at the bottom rear side of the rear end plate (3).

4. The easily assembled safety-type fuel cell stack housing according to claim 2, characterized in that, The number of front snap-fit ​​pieces (101) provided on the housing (1) is greater than or equal to two, and the number of rear snap-fit ​​pieces (102) provided on the housing (1) is greater than or equal to two.

5. The easily assembled safety-type fuel cell stack housing according to claim 1, characterized in that, The number of screw holes (5) opened on the front side of the top surface of the housing (1) is greater than or equal to two, and the number of screw holes (5) opened on the rear side of the top surface of the housing (1) is greater than or equal to two.

6. The easily assembled safety-type fuel cell stack housing according to claim 1, characterized in that, The bolt (4) is an M6 bolt.

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