Fixing structure for cell stack

Abstract

The utility model relates to the technical field of cell stacks, and discloses a fixing structure for a cell stack, which comprises an end plate, a fixing plate, a support, a first bolt and a second bolt. The end plate is fixed to the cell stack, a limiting groove is formed in the face, away from the cell stack, of the end plate, the limiting groove comprises a bottom face, a first inner wall, a second inner wall and a third inner wall, and a first screw hole is formed in the bottom face; a second screw hole is formed in the fixing plate; the support comprises a first end and a second end which are perpendicular to each other, a first through hole corresponding to the first screw hole is formed in the first end, a second through hole corresponding to the second screw hole is formed in the second end, the first end comprises a side face, a first outer wall, a second outer wall and a third outer wall, the first outer wall, the second outer wall and the third outer wall are arranged on the periphery of the side face, and the first end is arranged in the limiting groove. The first bolt is mounted in the first through hole and the first screw hole; and the second bolt is mounted in the second through hole and the second screw hole. According to the fixing structure disclosed by the utility model, the cell stack mounting structure is stable, and the safety performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery stacks, in particular to a fixing structure for a battery stack. Background Art

[0002] Hydrogen energy cells are power generation devices that use hydrogen as fuel and convert the chemical energy in the fuel into electrical energy through electrochemical reactions. The battery stack is mainly composed of membrane electrode, bipolar plate, current collector, air intake end plate, rear end plate, fixing assembly and other components. The rear end plate is an important component in the fuel cell. On the one hand, it makes the pressure on the battery stack uniform, and on the other hand, it is connected to the battery stack packaging box to fix the battery stack. At present, the rear end plate of the battery stack is generally fixed to the packaging box by L-shaped support through bolt connection. Since the diameter of the through hole is larger than the diameter of the bolt, that is, there is a gap of about 0.25mm on one side, when the torque is applied to the bolt, the bolt head will cause the L-shaped support to deflect along with the bolt due to the friction force, resulting in a deviation in the installation position of the L-shaped support, thereby affecting the stability of the installation structure and posing a safety hazard. Utility Model Content

[0003] The utility model aims to provide a fixing structure for a battery stack, so as to stabilize the installation structure of the battery stack and improve the safety performance.

[0004] In order to achieve the above object, the utility model provides a fixing structure for a battery stack, comprising:

[0005] An end plate is fixed to the battery stack, a side of the end plate away from the battery stack is provided with a limiting groove, a lower end of the limiting groove extends out of the end plate, the limiting groove comprises a bottom surface, a first inner wall, a second inner wall and a third inner wall arranged on the outer periphery of the bottom surface, and a first screw hole is arranged on the bottom surface;

[0006] A fixing plate, disposed below the end plate, the fixing plate is perpendicular to the end plate, and the fixing plate is provided with a second screw hole;

[0007] A support, comprising a first end and a second end perpendicular to each other, the first end being provided with a first through hole corresponding to the first screw hole, the second end being provided with a second through hole corresponding to the second screw hole, the first end comprising a side surface, a first outer wall, a second outer wall and a third outer wall arranged on the outer periphery of the side surface, the first end being arranged in a limiting groove, and the side surface being fitted with the bottom surface, the first outer wall being fitted with the first inner wall, the second outer wall being fitted with the second inner wall, and the third outer wall being fitted with the third inner wall;

[0008] A first bolt installed in the first through hole and the first screw hole; and

[0009] A second bolt is installed in the second through hole and the second screw hole.

[0010] In some embodiments, there are at least two limiting grooves, and the number of the supports corresponds to the number of the limiting grooves.

[0011] In some embodiments, two first screw holes are provided, and two first through holes are provided, and the first screw holes and the first through holes are arranged in a one-to-one correspondence.

[0012] In some embodiments, two second screw holes are provided, and two second through holes are provided, and the second screw holes and the second through holes are arranged in a one-to-one correspondence.

[0013] In some embodiments, the thickness of the first end portion is greater than the depth of the limiting groove.

[0014] In some embodiments, the bottom surface and the side surfaces are both rectangular.

[0015] In some embodiments, the length of the bottom surface is 0.01-0.2 mm greater than the length of the side surface.

[0016] In some embodiments, the first end and the second end are both in a rectangular parallelepiped shape.

[0017] In some embodiments, the lower surface of the second end portion is in contact with the upper surface of the fixing plate.

[0018] The utility model provides a fixing structure for a battery stack, which has the following beneficial effects compared with the prior art:

[0019] The support is connected to the end plate through a first bolt, and the support is connected to the fixing plate through a second bolt, and the first end is arranged in a limiting groove, and the side surface is fitted with the bottom surface, the first outer wall is fitted with the first inner wall, the second outer wall is fitted with the second inner wall, and the third outer wall is fitted with the third inner wall, so that the battery stack installation structure is stable and the safety performance is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a fixing structure for a battery stack provided in an embodiment of the utility model.

[0021] Figure 2 A schematic diagram of the exploded structure of the fixing structure for the battery stack provided in an embodiment of the utility model.

[0022] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure in.

[0023] In the figure: 1. end plate; 11. limiting groove; 111. bottom surface; 112. first inner wall; 113. second inner wall; 114. third inner wall; 115. first screw hole; 2. fixing plate; 21. second screw hole; 3. support; 31. first end; 311. first through hole; 312. side; 313. first outer wall; 314. second outer wall; 315. third outer wall; 32. second end; 321. second through hole; 4. first bolt; 5. second bolt; 6. battery stack. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0025] It should be understood that, in the description of the present application, the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, that is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.

[0026] like Figure 1-3As shown, the fixing structure for a battery stack of an embodiment of the utility model comprises an end plate 1, a fixing plate 2, a support 3, a first bolt 4 and a second bolt 5. The end plate 1 is fixed to the battery stack 6, and a limiting groove 11 is provided on a side of the end plate 1 away from the battery stack, and the lower end of the limiting groove 11 extends out of the end plate 1, and the limiting groove 11 comprises a bottom surface 111, a first inner wall 112, a second inner wall 113 and a third inner wall 114 arranged on the periphery of the bottom surface 111, and a first screw hole 115 is arranged on the bottom surface 111; the fixing plate 2 is arranged below the end plate 1, and the fixing plate 2 is perpendicular to the end plate 1, and a second screw hole 21 is arranged on the fixing plate 2; the support 3 comprises a first end portion 31 and a second end portion 32 perpendicular to each other, and a first through hole 311 corresponding to the first screw hole 115 is arranged on the first end portion 31, and a first through hole 311 corresponding to the first screw hole 115 is arranged on the second end portion 32. The portion 32 is provided with a second through hole 321 corresponding to the second screw hole 21, the first end portion 31 includes a side surface 312, a first outer wall 313, a second outer wall 314 and a third outer wall 315 arranged on the outer periphery of the side surface 312, the first end portion 31 is arranged in the limiting groove 11, and the side surface 312 is in contact with the bottom surface 111, the first outer wall 313 is in contact with the first inner wall 112, the second outer wall 314 is in contact with the second inner wall 113, and the third outer wall 315 is in contact with the third inner wall 114; the first bolt 4 is installed in the first through hole 311 and the first screw hole 115; the second bolt 5 is installed in the second through hole 321 and the second screw hole 21.

[0027] During installation, the first end portion 31 is installed in the limiting groove 11, so that the side surface 312 fits with the bottom surface 111, the first outer wall 313 fits with the first inner wall 112, the second outer wall 314 fits with the second inner wall 113, and the third outer wall 315 fits with the third inner wall 114, so as to achieve the effect of limiting the position, and then the first bolt 4 is installed in the first through hole 311 and the first screw hole 115 to ensure the stable installation of the support 3 and the end plate 1, and the second bolt 5 is installed in the second through hole 321 and the second screw hole 21 to ensure the stable installation of the support 3 and the fixing plate. Based on the above structural setting, the battery stack installation structure is stable and the safety performance is improved.

[0028] like Figure 2 and 3 As shown, specifically, at least two limiting grooves 11 are provided, and the number of the supports 3 corresponds to the number of the limiting grooves 11. By providing a plurality of supports 2 and limiting grooves 11, the stability of the battery stack installation structure can be further improved.

[0029] In order to improve the convenience of installing the first end 31, two first screw holes 115 are provided, and two first through holes 311 are provided, and the first screw holes 115 and the first through holes 311 are arranged in a one-to-one correspondence. Positioning is achieved by inserting the first bolts 4 into the first screw holes 115 and the first through holes 311 accordingly, and the first end 31 will not deflect during the process of screwing the first bolts 4, thereby ensuring the stability of the structure.

[0030] In order to improve the convenience of installing the second end 32, two second screw holes 21 are provided, and two second through holes 321 are provided, and the second screw holes 21 and the second through holes 321 are arranged in a one-to-one correspondence. Positioning is achieved by inserting the second bolts 5 into the second screw holes 21 and the second through holes 321 accordingly. During the process of screwing the second bolts 5, the second end 32 will not deflect, thereby ensuring the stability of the structure.

[0031] In one embodiment, the thickness of the first end portion 31 is greater than the depth of the limiting groove 11 , so that the first end portion 31 installed on the rear surface of the limiting groove 11 can protrude from the side of the end plate 1 , thereby facilitating the installation of the first bolt on the first end portion 31 .

[0032] In one embodiment, the bottom surface 111 and the side surface 312 are both rectangular, so that the first end portion 31 is installed in the limiting groove 11 without deflection.

[0033] Specifically, the length of the bottom surface 11 is 0.01-0.2 mm greater than the length of the side surface 312, that is, the length of the second outer wall 314 is less than the length of the second inner wall 113, so that the first end 31 has a margin when installed in the limiting groove 11, which can ensure the installation accuracy and facilitate the installation of the first end 31.

[0034] In one embodiment, the first end portion 31 and the second end portion 32 are both in a rectangular parallelepiped shape, wherein the first end portion 31 and the second end portion 32 are integrally formed.

[0035] In one embodiment, the lower surface of the second end portion 32 is in contact with the upper surface of the fixing plate 2, so that the mounting structure between the support 3 and the fixing plate 2 is stable.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A fixing structure for a battery stack, characterized in that: include: An end plate is fixed to the battery stack, a side of the end plate away from the battery stack is provided with a limiting groove, a lower end of the limiting groove extends out of the end plate, the limiting groove comprises a bottom surface, a first inner wall, a second inner wall and a third inner wall arranged on the outer periphery of the bottom surface, and a first screw hole is arranged on the bottom surface; A fixing plate is arranged below the end plate, and the fixing plate is perpendicular to the end plate, and the fixing plate is provided with a second screw hole; A support, comprising a first end and a second end perpendicular to each other, the first end being provided with a first through hole corresponding to the first screw hole, the second end being provided with a second through hole corresponding to the second screw hole, the first end comprising a side surface, a first outer wall, a second outer wall and a third outer wall arranged on the outer periphery of the side surface, the first end being arranged in a limiting groove, and the side surface being fitted with the bottom surface, the first outer wall being fitted with the first inner wall, the second outer wall being fitted with the second inner wall, and the third outer wall being fitted with the third inner wall; A first bolt is installed in the first through hole and the first screw hole; and A second bolt is installed in the second through hole and the second screw hole.

2. The battery stack fixing structure according to claim 1, characterized in that: There are at least two limiting grooves, and the number of the supports corresponds to the number of the limiting grooves.

3. The battery stack fixing structure according to claim 1, characterized in that: There are two first screw holes, there are two first through holes, and the first screw holes and the first through holes are arranged in a one-to-one correspondence.

4. The battery stack fixing structure according to claim 1, characterized in that: There are two second screw holes, there are two second through holes, and the second screw holes and the second through holes are arranged in a one-to-one correspondence.

5. The battery stack fixing structure according to claim 1, characterized in that: The thickness of the first end portion is greater than the depth of the limiting groove.

6. The battery stack fixing structure according to claim 1, characterized in that: The bottom surface and the side surfaces are both rectangular.

7. The battery stack fixing structure according to claim 6, characterized in that: The length of the bottom surface is 0.01-0.2 mm greater than the length of the side surface.

8. The battery stack fixing structure according to claim 1, characterized in that: The first end portion and the second end portion are both in a rectangular parallelepiped shape.

9. The battery stack fixing structure according to claim 1, characterized in that: The lower surface of the second end portion is in contact with the upper surface of the fixing plate.

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