Auxiliary positioning device and fuel cell stack press assembly

Abstract

This invention provides an auxiliary positioning device and a fuel cell stack pressing assembly. The auxiliary positioning device includes a housing, a supporting beam, and a movable positioning rod. At least one wall of the housing is provided with the supporting beam. The movable positioning rod is located inside the housing and is detachably connected to the supporting beam. The auxiliary positioning device of this invention has a simple overall structure and is easy to manufacture. Through the cooperation of the supporting beam and the movable positioning rod, it can provide precise and effective positioning for one side of a single cell, improving the positioning effect and enabling the positioning of the stack core during fuel cell stack pressing, preventing the stack core from tilting. The supporting beam is connected to the housing and the movable positioning rod using simple and reliable mechanical connections, without adding electronic components, making the process more stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, and in particular to an auxiliary positioning device and a fuel cell stack press assembly. Background Technology

[0002] The fuel cell stack is a core component of a fuel cell system, consisting of the stack core, housing, and other parts. During the press-fitting process, the front end plate, front insulation plate, front current collector, individual cells, rear current collector, rear insulation plate, and rear end plate of the stack core are first stacked together, and then pressed together using a press. In the stacking of hundreds of individual cells, sealing strips are located near the edges of the individual cells, making them prone to misalignment during press-fitting. Currently, to address these issues, auxiliary positioning devices are often used during the stack press-fitting process to position the individual cells and prevent stack core tilting; however, existing auxiliary positioning devices suffer from low positioning accuracy and poor positioning performance. Summary of the Invention

[0003] This invention provides an auxiliary positioning device and an electric stack pressing assembly to solve the problems of low positioning accuracy and poor positioning effect of existing auxiliary positioning devices.

[0004] An auxiliary positioning device includes a housing, a support beam, and a movable positioning rod;

[0005] At least one wall of the box body is provided with the supporting crossbeam;

[0006] The movable positioning rod is located inside the box, and the movable positioning rod is detachably connected to the support beam.

[0007] Preferably, the supporting crossbeam is provided with a first slot, and the movable positioning rod is inserted and fixed in the first slot;

[0008] Alternatively, the movable positioning rod is provided with a second slot, and the supporting crossbeam is inserted and fixed in the second slot;

[0009] Alternatively, the supporting crossbeam may have a first slot, and the movable positioning rod may have a second slot, with the first slot and the second slot interlocking.

[0010] Preferably, the auxiliary positioning device further includes a fixed positioning rod, which is located inside the housing;

[0011] At least one wall of the box body is provided with the fixed positioning rod, and the box wall where the fixed positioning rod is located and the box wall where the supporting crossbeam is located are two box walls that are arranged opposite to each other.

[0012] Preferably, each of the box walls is provided with multiple supporting beams, and the multiple supporting beams are arranged along the vertical direction of the box body.

[0013] Preferably, there is a filling gap at the insertion point of the supporting crossbeam and the movable positioning rod;

[0014] The auxiliary positioning device also includes a flexible pad, which is disposed within the filling gap so that the movable positioning rod contacts the single battery inside the box.

[0015] Preferably, the gap depth of the filling gap is 4.5-5.5 mm.

[0016] Preferably, the supporting beam includes a beam body and two fixing blocks extending from both ends of the beam body in opposite directions; the two fixing blocks are detachably installed on the same wall of the box body;

[0017] The first slot is disposed on the main body of the crossbeam.

[0018] Preferably, the auxiliary positioning device further includes an extension rod, which is detachably mounted on the top of the fixed positioning rod.

[0019] Preferably, the top end of the movable positioning rod is provided with a clearance groove, and the auxiliary positioning device further includes a limiting block;

[0020] The limiting block is installed at the top of the box and abuts against the clearance groove.

[0021] An electric stack press assembly includes two auxiliary positioning devices; one of the auxiliary positioning devices is installed on two first walls of the housing, and the other auxiliary positioning device is installed on two second walls of the housing, wherein the two first walls are two walls of the housing arranged opposite each other along a first direction, and the two second walls are two walls of the housing arranged opposite each other along a second direction.

[0022] This invention relates to a method for press-fitting a battery stack. First, the front insulating plate, front current collector, single cell, rear current collector, rear insulating plate, and rear end plate are sequentially stacked inside a housing. Then, a movable positioning rod is installed inside the housing, and a support beam is detachably installed on the housing wall. Finally, the movable positioning rod is detachably installed on the support beam. This configuration, through the cooperation of the support beam and the movable positioning rod, provides precise and effective positioning for one side of the single cell, improving the positioning effect. This facilitates the sequential stacking and press-fitting of the front end plate, front insulating plate, front current collector, single cell, rear current collector, rear insulating plate, and rear end plate to form the stack core, preventing the stack core from tilting. After press-fitting, the support beam is removed first, then the movable positioning rod is removed, and finally the battery is encapsulated. This allows for the reuse of the support beam and the movable positioning rod, effectively saving costs.

[0023] Compared with existing technologies, the auxiliary positioning device in this example has a simple overall structure and is easy to manufacture. By cooperating with the support beam and the movable positioning rod, it can provide accurate and effective positioning for one side of a single cell, improving the positioning effect and enabling the positioning of the core during the stack pressing process to prevent the stack core from tilting. The support beam and the housing, as well as the support beam and the movable positioning rod, are connected by simple and reliable mechanical connections without adding electronic components, making the process more stable and reliable. Moreover, the support beam and the movable positioning rod can be reused, effectively saving costs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is an isometric view of the fuel cell stack press assembly in one embodiment of the present invention;

[0026] Figure 2 This is an isometric view of the auxiliary positioning device in one embodiment of the present invention;

[0027] Figure 3 This is a cross-sectional view of the part where the supporting crossbeam and the movable positioning rod meet in one embodiment of this utility model;

[0028] Figure 4 This is an axonometric view of the first crossbeam in one embodiment of the present invention;

[0029] Figure 5 This is an isometric view of the first movable positioning rod in one embodiment of the present invention.

[0030] The components are as follows: 1. Box body; 2. Support beam; 21. Beam body; 22. Fixing block; 3. Movable positioning rod; 4. First slot; 5. Second slot; 6. Fixed positioning rod; 7. Flexible pad; 8. Extension rod; 9. Clearance slot; 10. Limiting block; 11. Front end plate; 12. Front insulation plate; 13. Front current collector plate. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0032] In the description of this application, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] This utility model provides an auxiliary positioning device, referring to... Figure 1 , Figure 2 and Figure 3 The auxiliary positioning device includes a housing 1, a supporting beam 2, and a movable positioning rod 3; at least one wall of the housing 1 is provided with the supporting beam 2; the movable positioning rod 3 is disposed inside the housing 1 and is detachably connected to the supporting beam 2.

[0035] As an example, this auxiliary positioning device is used in the process of stacking fuel cells. It includes a housing 1, a supporting beam 2, and a movable positioning rod 3 to provide positioning for the individual cells within the housing 1. During installation, the supporting beam 2 is provided on at least one wall of the housing 1. That is, the supporting beam 2 can be installed on one of the front or rear walls of the housing 1, or on one of the left or right walls. Specifically, the supporting beam 2 is detachably installed on one wall of the housing 1 using bolts, utilizing the threaded holes of the housing 1 itself. The operation is simple and easy to learn. The supporting beam 2 can be embedded inside the housing wall, located on the inner side of the housing wall, or on the outer side of the housing wall. The movable positioning rod 3 is placed inside the housing 1 and is detachably connected to the supporting beam 2, allowing the movable positioning rod 3 to contact one side of the individual cell, providing precise and effective positioning for that side of the individual cell. Specifically, the box body 1 has an operating window on the support beam 2. When the support beam 2 is embedded inside the box wall, i.e., the support beam 2 is located inside the operating window, the movable positioning rod 3 is installed on the support beam 2 by means of screwing, snapping, or bonding. When the support beam 2 is located on the inner side of the box wall, the movable positioning rod 3 is installed on the support beam 2 by means of screwing, snapping, or bonding. When the support beam 2 is located on the outer side of the box wall, part of the movable positioning rod 3 passes through the operating window and is installed on the support beam 2 by means of screwing, snapping, or bonding.

[0036] When pressing the battery stack, the front insulating plate 12, front current collector 13, single cell, rear current collector, rear insulating plate, and rear end plate are first stacked sequentially inside the housing 1. Then, the movable positioning rod 3 is placed inside the housing 1, and the support beam 2 is detachably installed on the wall of the housing 1. Finally, the movable positioning rod 3 is detachably installed on the support beam 2. This arrangement, through the cooperation of the support beam 2 and the movable positioning rod 3, provides precise and effective positioning for one side of the single cell, improving the positioning effect. This facilitates the sequential stacking and pressing of the front end plate 11, front insulating plate 12, front current collector 13, single cell, rear current collector, rear insulating plate, and rear end plate to form the stack core, preventing the stack core from tilting. After pressing, the support beam 2 is removed first, then the movable positioning rod 3 is removed, and finally the battery is encapsulated. This allows for the reuse of the support beam 2 and the movable positioning rod 3, effectively saving costs.

[0037] Compared with existing technologies, the auxiliary positioning device in this example has a simpler overall structure and lower manufacturing difficulty. Through the cooperation of the support beam 2 and the movable positioning rod 3, it can provide precise and effective positioning for one side of a single cell, improving the positioning effect and enabling the positioning of the stack core during the stack pressing process, preventing the stack core from tilting. The support beam 2 and the housing 1, as well as the support beam 2 and the movable positioning rod 3, are connected by simple and reliable mechanical connections without adding electronic components, making the process more stable and reliable. Furthermore, the support beam 2 and the movable positioning rod 3 can be reused, effectively saving costs. In addition, the support beam 2 is assembled on the outside of the housing 1, and the movable positioning rod 3 is installed on the support beam 2, forming an external positioning structure, reducing the need for internal positioning structures and avoiding installation problems caused by manufacturing errors.

[0038] In one embodiment, reference is made to Figure 3 , Figure 4 and Figure 5 The supporting beam 2 is provided with a first slot 4, and the movable positioning rod 3 is inserted and fixed in the first slot 4; or, the movable positioning rod 3 is provided with a second slot 5, and the supporting beam 2 is inserted and fixed in the second slot 5; or, the supporting beam 2 is provided with a first slot 4, the movable positioning rod 3 is provided with a second slot 5, and the first slot 4 and the second slot 5 are cross-connected.

[0039] As an example, the detachable connection between the movable positioning rod 3 and the supporting crossbeam 2 includes three arrangement forms: First, the supporting crossbeam 2 has a first slot 4, and the movable positioning rod 3 is inserted and fixed into the first slot 4 to achieve assembly between the movable positioning rod 3 and the supporting crossbeam 2. Second, the movable positioning rod 3 has a second slot 5, and the supporting crossbeam 2 is inserted and fixed into the second slot 5 to achieve assembly between the movable positioning rod 3 and the supporting crossbeam 2. Third, the supporting crossbeam 2 has a first slot 4, and the movable positioning rod 3 has a second slot 5; the movable positioning rod 3 is assembled with the first slot 4 and the second slot 5 cross-connected. In this example, by setting the first slot 4 and / or the second slot 5, it is convenient to assemble the movable positioning rod 3 and the supporting crossbeam 2 together, so that the supporting crossbeam 2 and the movable positioning rod 3 can provide accurate and effective positioning for one side of the single cell, improving the positioning effect and achieving the positioning of the core during the stack pressing process, preventing the stack core from tilting.

[0040] In one embodiment, reference is made to Figure 1 and Figure 2 The auxiliary positioning device also includes a fixed positioning rod 6, which is located inside the box body 1; at least one box wall of the box body 1 is provided with the fixed positioning rod 6, and the box wall where the fixed positioning rod 6 is located and the box wall where the supporting beam 2 is located are two box walls that are arranged opposite to each other.

[0041] As an example, the auxiliary positioning device also includes a fixed positioning rod 6. During installation, a fixed positioning rod 6 is provided on at least one wall of the housing 1. The wall where the fixed positioning rod 6 is located and the wall where the supporting beam 2 is located are two opposing walls. That is, the supporting beam 2 can be provided on one of the front and rear walls of the housing 1 and on the other of the left and right walls of the housing 1; alternatively, the fixed positioning rod 6 can be provided on one of the front and rear walls of the housing 1 and on the other of the left and right walls of the housing 1. The fixed positioning rod 6 is located inside the housing 1. Specifically, the fixed positioning rod 6 has a fixing hole, and a bolt is inserted into the fixing hole and the threaded hole on one wall of the housing 1 to install the fixed positioning rod 6 on the inner side of one wall of the housing 1 and make contact with one side of the single battery stacked inside the housing 1, thus providing positioning for one side of the single battery.

[0042] In this example, when pressing the battery stack, the fixed positioning rod 6 is first fixedly installed on one of the front and rear walls or one of the left and right walls of the housing 1; then the front insulating plate 12, the front current collector 13, the single cell, the rear current collector, the rear insulating plate, and the rear end plate are stacked sequentially inside the housing 1; then the movable positioning rod 3 is set inside the housing 1, and the support beam 2 is detachably installed on the other of the front and rear walls or the other of the left and right walls of the housing 1, with the movable positioning rod 3 detachably connected to the support beam 2; this setup first provides positioning for one side of the single cell through the fixed positioning rod 6, and then provides positioning for the other side of the single cell through the movable positioning rod 3, achieving positioning for the single cell from multiple sides, improving the positioning effect, and facilitating the sequential stacking and pressing of the front end plate 11, the front insulating plate 12, the front current collector 13, the single cell, the rear current collector, the rear insulating plate, and the rear end plate to form the stack core, preventing the stack core from tilting. After pressing is completed, the support beam 2 is removed first, then the movable positioning rod 3 is removed, and finally the battery is encapsulated; this allows the support beam 2 and the movable positioning rod 3 to be reused, effectively saving costs.

[0043] Compared with existing technologies, the auxiliary positioning device in this example has a simple overall structure and low processing difficulty. By cooperating with the fixed positioning rod 6 and the movable positioning rod 3, a cage-type pressing fixture is formed, which can provide positioning for single cells from multiple sides, improving the positioning effect and realizing the positioning of the core during the pressing process of the fuel cell stack, preventing the core of the fuel cell stack from tilting. The connection between the fixed positioning rod 6 and the housing 1, the connection between the support beam 2 and the housing 1, and the connection between the support beam 2 and the movable positioning rod 3 are all made by simple and reliable mechanical connection methods, without adding electronic components, making the process more stable and reliable.

[0044] In one embodiment, reference is made to Figure 1 and Figure 2Each box wall is provided with multiple support beams 2, which are arranged along the vertical direction of the box body 1.

[0045] As an example, each box wall is provided with multiple support beams 2. That is, multiple support beams 2 are arranged on any box wall where support beams 2 are provided in the box body 1. The multiple support beams 2 are arranged along the vertical direction of the box body 1. With this arrangement, multiple support beams 2 are simultaneously connected to the movable positioning rod 3, which can provide stable and reliable support for the movable positioning rod 3, improve the stability of the movable positioning rod 3, and thus improve the positioning effect of the auxiliary positioning device.

[0046] In one embodiment, reference is made to Figure 1 , Figure 2 and Figure 3 There is a filling gap at the insertion point of the support beam 2 and the movable positioning rod 3; the auxiliary positioning device also includes a flexible pad 7, which is set in the filling gap so that the movable positioning rod 3 contacts the single battery in the box 1.

[0047] As an example, a filling gap exists at the insertion point of the support beam 2 and the movable positioning rod 3, meaning a filling gap is formed within the first slot 4 and / or the second slot 5. The auxiliary positioning device also includes a flexible pad 7. During installation, the flexible pad 7 is placed within the filling gap, allowing the movable positioning rod 3 to contact the single battery inside the housing 1. Specifically, the thickness of the flexible pad 7 is estimated based on the distance from the single battery to the movable positioning rod 3, and then a flexible pad 7 of appropriate thickness is selected and placed within the filling gap, positioning the movable positioning rod 3 in contact with the single battery, thus positioning the single battery inside the housing 1. During the stack pressing process, the movable positioning rod 3 and the support beam 2 are pre-installed, and then the flexible pad 7 is filled at the junction of the support beam 2 and the movable positioning rod 3. This achieves a soft contact between the movable positioning rod 3 and the single battery, avoiding single battery deformation caused by a hard connection and preventing installation problems due to processing errors. The flexible pad 7 can be a foamed silicone pad.

[0048] In one embodiment, reference is made to Figure 3 The gap depth for filling the gap is 4.5-5.5mm.

[0049] As an example, the gap depth of the filling gap, which is the distance L between the movable positioning rod 3 and the supporting crossbeam 2, is 4.5-5.5mm. A flexible pad 7 with a thickness of 4.5-5.5mm can be installed to ensure that the movable positioning rod 3 is in contact with the single battery, providing accurate positioning for the single battery. The optimal gap depth is 5mm.

[0050] In one embodiment, reference is made to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The supporting beam 2 includes a beam body 21 and two fixing blocks 22 extending from both ends of the beam body 21 in opposite directions; the two fixing blocks 22 are detachably installed on the same wall of the box body 1; the first slot 4 is provided on the beam body 21.

[0051] As an example, the supporting beam 2 includes a beam body 21 and two fixing blocks 22. The two fixing blocks 22 are components extending from both ends of the beam body 21 in opposite directions. Each fixing block 22 has a fixing hole, and bolts are inserted into the fixing holes and threaded holes on one wall of the housing 1. This allows the two fixing blocks 22 to be installed on the same wall of the housing 1, thus enabling the supporting beam 2 to be installed on one wall of the housing 1. The filling gap has three arrangement forms: First, a first slot 4 is provided on the beam body 21, forming a filling gap; second, a second slot 5 is provided on the movable positioning rod 3, forming a filling gap; third, a first slot 4 is provided on the beam body 21, and a second slot 5 is provided on the movable positioning rod 3, with the second slot 5 intersecting with the first slot 4 to form a filling gap. In this example, by setting the first slot 4 and / or the second slot 5, it is convenient to assemble the movable positioning rod 3 with the support beam 2, so that the support beam 2 and the movable positioning rod 3 can cooperate to provide accurate and effective positioning for one side of the single cell, improve the positioning effect, and achieve the positioning of the core during the stack pressing process to prevent the stack core from tilting. The filling gap is formed by the first slot 4 and / or the second slot 5. The thickness of the flexible pad 7 can be estimated based on the distance from the single cell to the movable positioning rod 3. Then, a flexible pad 7 of appropriate thickness is selected and placed in the filling gap so that the movable positioning rod 3 is in contact with the single cell, which can position the single cell in the housing 1. During the stack pressing process, the movable positioning rod 3 and the support beam 2 are pre-installed. Then, the flexible pad 7 is filled at the junction of the support beam 2 and the movable positioning rod 3 (i.e., in the filling gap formed by the first slot 4 and / or the second slot 5). This achieves a soft contact between the movable positioning rod 3 and the single cell. On the one hand, it can avoid the problem of single cell deformation caused by hard connection. On the other hand, it can avoid problems in the installation process caused by processing errors.

[0052] In one embodiment, reference is made to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The number of first slots 4 is one or more, and two adjacent first slots 4 are spaced apart along the length direction of the crossbeam body 21; the number of second slots 5 is one or more, and two adjacent second slots 5 are spaced apart along the length direction of the movable positioning rod 3; each first slot 4 and a second slot 5 are cross-connected.

[0053] As an example, the number of first slots 4 is one or more, with adjacent first slots 4 spaced apart along the length of the main body 21 of the crossbeam. This arrangement allows the number of first slots 4 on the supporting crossbeam 2 to be selected according to actual needs. The number of first slots 4 determines the number of movable positioning rods 3, enabling the movable positioning rods 3 to position one side of the single battery inside the housing 1, thus improving positioning accuracy. The number of second slots 5 is one or more, with adjacent second slots 5 spaced apart along the length of the movable positioning rod 3. This arrangement allows the number of second slots 5 on the movable positioning rod 3 to be selected according to actual needs. The number of second slots 5 determines the number of supporting crossbeams 2, ensuring that the supporting crossbeams 2 provide stable and reliable support for the movable positioning rods 3. Each first slot 4 intersects with a second slot 5; this arrangement facilitates the installation of the movable positioning rods 3 on the crossbeam, enabling the positioning of the single battery via the movable positioning rods 3.

[0054] In one embodiment, reference is made to Figure 1 and Figure 2 The auxiliary positioning device also includes an extension rod 8, which is detachably installed on the top of the fixed positioning rod 6.

[0055] As an example, the auxiliary positioning device also includes an extension rod 8. During installation, the extension rod 8 is installed on the top of the fixed positioning rod 6 by screwing, snapping, or gluing, specifically using the bolt holes on the housing 1 for fixing. This method is simple, cost-effective, and reduces operating costs. When the core exceeds the height of the housing 1, the extension rod 8 at the top of the fixed positioning rod 6 can position the core extending beyond the housing 1. The height of the positioning rod can be calculated based on the thickness and number of individual cells.

[0056] In one embodiment, reference is made to Figure 2 and Figure 5 The top of the movable positioning rod 3 is provided with an avoidance groove 9; the auxiliary positioning device also includes a limiting block 10; the limiting block 10 is installed on the top of the box 1 and abuts against the avoidance groove 9.

[0057] As an example, a clearance groove 9 is provided at the top of the movable positioning rod 3. The clearance groove 9 can avoid the wall of the housing 1, facilitating the installation of the movable positioning rod 3. The auxiliary positioning device also includes a limiting block 10. During installation, the limiting block 10 is fixed to the top of the housing 1 with bolts and abuts against the clearance groove 9, which can limit the movement of the movable positioning rod 3 and prevent it from affecting the fuel cell stack pressing operation.

[0058] As an example, this utility model embodiment provides a fuel cell stack press-fit assembly, referring to... Figure 1 and Figure 2It includes two auxiliary positioning devices; one auxiliary positioning device is installed on the two first boxes of the box 1, and the other auxiliary positioning device is installed on the two second boxes of the box 1. The two first boxes are two boxes of the box 1 arranged opposite each other along a first direction, and the two second boxes are two boxes of the box 1 arranged opposite each other along a second direction.

[0059] Among them, the first direction and the second direction are two mutually perpendicular directions. Taking the box 1 as the reference, the first direction is the front-back / left-right direction of the box 1, and the second direction is the left-right / front-back direction of the box 1.

[0060] As an example, the fuel cell stack press-fit assembly includes two auxiliary positioning devices. One auxiliary positioning device is installed on the two first walls of the housing 1, and the other auxiliary positioning device is installed on the two second walls of the housing 1. The two first walls are two walls of the housing 1 arranged opposite each other along a first direction, and the two second walls are two walls of the housing 1 arranged opposite each other along a second direction. The auxiliary positioning device includes the housing 1, a support beam 2, and a movable positioning rod 3. During installation, the fixed positioning rod 6 of one auxiliary positioning device is fixedly installed on the inner side of one of the first walls of the housing 1 and contacts the first side of the single cell stacked in the housing 1, thus providing positioning for the first side of the single cell. The support beam 2 of one auxiliary positioning device is detachably installed on the outer side of the other first wall of the housing 1. An operation window is provided on the other first wall of the housing 1. Part of the structure of the movable positioning rod 3 passes through the operation window and is installed on the support beam 2. The position of the movable positioning rod 3 is adjusted according to the distance from the single cell to the movable positioning rod 3 so that the movable positioning rod 3 contacts the second side of the single cell, thus providing positioning for the second side of the single cell. A fixed positioning rod 6 of another auxiliary positioning device is fixedly installed on the inner side of a second wall of the housing 1, and contacts the third side of the single battery stacked in the housing 1, providing positioning for the third side of the single battery. A support beam 2 of another auxiliary positioning device is detachably installed on the outer side of another second wall of the housing 1. An operation window is provided on the other second wall of the housing 1. Part of the structure of the movable positioning rod 3 passes through the operation window and is installed on the support beam 2. The position of the movable positioning rod 3 is adjusted according to the distance from the single battery to the movable positioning rod 3, so that the movable positioning rod 3 contacts the fourth side of the single battery, providing positioning for the fourth side of the single battery.

[0061] When pressing the battery stack, firstly, the fixed positioning rods 6 of the two auxiliary positioning devices are fixedly installed on the inner side of a first box wall and a second box wall of the housing 1, respectively; then, the front insulating plate 12, the front current collector 13, the single cell, the rear current collector, the rear insulating plate, and the rear end plate are stacked sequentially inside the housing 1; then, the movable positioning rods 3 of the two auxiliary positioning devices are set inside the housing 1, and then the support beams 2 of the two auxiliary positioning devices are detachably installed on the outer side of another first box wall and another second box wall of the housing 1, respectively; finally, the movable positioning rods 3 of the two auxiliary positioning devices are passed through the other first box wall of the housing 1, respectively. The operating windows on the enclosure wall and the second enclosure wall are detachably mounted on the support beams 2 of the two auxiliary positioning devices. This configuration allows for positioning of the first and third sides of the single battery via the fixed positioning rods 6 of the two auxiliary positioning devices, and then positioning of the second and fourth sides via the movable positioning rods 3 of the two auxiliary positioning devices. This multi-faceted positioning improves the positioning effect and facilitates the sequential stacking and pressing of the front panel 11, front insulation plate 12, front current collector 13, single battery, rear current collector, rear insulation plate, and rear end panel to form the battery core, preventing the battery core from tilting. After pressing, the support beams 2 are removed first, then the movable positioning rods 3 are removed, and finally the battery is encapsulated. This allows for the reuse of the support beams 2 and movable positioning rods 3, effectively saving costs.

[0062] Compared with existing technologies, the auxiliary positioning device in this example has a simpler overall structure and lower processing difficulty. Through the cooperation of the fixed positioning rod 6 and the movable positioning rod 3, a cage-type pressing fixture is formed, which can provide positioning for single cells from multiple sides, improving the positioning effect and enabling the positioning of the stack core during the stack pressing process, preventing the stack core from tilting. The connections between the fixed positioning rod 6 and the housing 1, between the support beam 2 and the housing 1, and between the support beam 2 and the movable positioning rod 3 are all simple and reliable mechanical connections, without adding electronic components, making the process more stable and reliable. Furthermore, the support beam 2 and the movable positioning rod 3 can be reused, effectively saving costs. In addition, the support beam 2 is assembled on the outside of the housing 1, and the movable positioning rod 3 is installed on the support beam 2, forming an external positioning structure, reducing the need for internal positioning structures and avoiding problems during installation due to processing errors.

[0063] In one example, refer to Figure 1 and Figure 2The auxiliary positioning device installed on the front and rear walls of the housing 1 includes three supporting beams 2, spaced apart along the height of the housing 1. Each supporting beam 2 has two first slots 4 spaced apart along its length. There are two movable positioning rods 3, each with three second slots 5 spaced apart along its length. Each first slot 4 intersects with a second slot 5. This arrangement facilitates the installation of the movable positioning rods 3 on the beams, enabling positioning of the single battery. Simultaneously, each first slot 4 and second slot 5 intersects to form a filling gap, within which a flexible pad 7 is installed. This results in six flexible pads 7 on the first side of the single battery, increasing the soft contact between the movable positioning rod 3 and the single battery, further improving the flexibility of the contact. This avoids battery deformation caused by rigid connections and prevents installation problems due to processing errors. In addition, the support beam 2 of the auxiliary positioning device is provided with a weight reduction groove, which can reduce costs.

[0064] The auxiliary positioning device installed on the left and right walls of the housing 1 consists of three supporting beams 2, spaced apart along the height of the housing 1. Each supporting beam 2 has a first slot 4, and each movable positioning rod 3 has three second slots 5 spaced apart along its length. Each first slot 4 intersects with one second slot 5. This arrangement facilitates the installation of the movable positioning rod 3 on the beams, enabling positioning of the single battery. Simultaneously, each first slot 4 and second slot 5 intersects to form a filling gap, within which a flexible pad 7 is installed. Thus, three flexible pads 7 are provided on the first side of the single battery, increasing the soft contact connection between the movable positioning rod 3 and the single battery, further improving the flexibility of the contact. This avoids battery deformation caused by rigid connections and prevents installation problems due to processing errors.

[0065] In one embodiment, reference is made to Figure 1 and Figure 2 The fuel cell stack assembly also includes a tooling base; a front end plate 11 is installed at the bottom of the housing 1, and the front end plate 11 is installed on the tooling base.

[0066] As an example, the fuel cell stack press assembly also includes a tooling base. During installation, using the tooling base as the installation reference, the front end plate 11 is first installed on the tooling base, and then the bottom end of the housing 1 is installed on the front end plate 11. Specifically, one of the positioning post and the positioning groove is provided on the upper surface of the front end plate 11, and the other of the positioning post and the positioning groove is provided on the bottom end of the housing 1. The positioning post and the positioning groove cooperate to provide guidance and limitation for installing the housing 1 on the front end plate 11. Then, it is locked by fixing bolts.

[0067] In one embodiment, the fuel cell stack pressing assembly further includes a pressing workbench and a press; a tooling base is installed on the pressing workbench; and the press is used to press the fuel cell core inside the housing 1.

[0068] As an example, the fuel cell stack press assembly also includes a press workbench and a press; during installation, the tooling base is installed on the press workbench, and the front end plate 11 is installed on the tooling base. Specifically, the tooling base is provided with positioning pins, which are used to position the front end plate 11. During the stacking process, on the pressing workbench, the tooling base, front end plate 11, and housing 1 are installed sequentially. A fixed positioning rod 6 of an auxiliary positioning device is fixedly installed inside a first wall of housing 1, contacting the first side of the single cells stacked inside housing 1, providing positioning for the first side of the single cells. Another fixed positioning rod 6 of an auxiliary positioning device is fixedly installed inside a second wall of housing 1, contacting the third side of the single cells stacked inside housing 1, providing positioning for the third side of the single cells. Then, the front insulation plate 12, front current collector 13, single cells, rear current collector, rear insulation plate, and rear end plate are sequentially stacked inside housing 1. A support beam 2 of an auxiliary positioning device is detachably installed on the outside of another first wall of housing 1. An operating window is provided on the other first wall of housing 1. Part of the structure of the movable positioning rod 3 passes through the operating window and is installed on the support beam 2. At this time, there is a filling gap at the junction of the support beam 2 and the movable positioning rod 3. The positioning is performed according to the single cell's position... The thickness of the flexible pad 7 is estimated based on the distance of the movable positioning rod 3. Then, a flexible pad 7 of appropriate thickness is selected and placed in the filling gap, so that the movable positioning rod 3 is in contact with the second side of the single cell, which can provide positioning for the second side of the single cell in the housing 1. The support beam 2 of another auxiliary positioning device is detachably installed on the outside of the other second box wall of the housing 1. An operation window is provided on the other second box wall of the housing 1. Part of the structure of the movable positioning rod 3 passes through the operation window and is installed on the support beam 2. At this time, there is a filling gap at the junction of the support beam 2 of the auxiliary positioning device and the movable positioning rod 3. The thickness of the flexible pad 7 is estimated based on the distance from the single cell to the movable positioning rod 3. Then, a flexible pad 7 of appropriate thickness is selected and placed in the filling gap, so that the movable positioning rod 3 is in contact with the fourth side of the single cell, which can provide positioning for the fourth side of the single cell in the housing 1. Finally, the press is turned on, and the press presses the single cell, the rear current collector, the rear insulation plate and the rear end plate according to the set pressing program and pressing force. After pressing is completed, the support beams 2 of the two auxiliary positioning devices are removed first, then the movable positioning rods 3 of the auxiliary positioning devices are removed, and finally the battery is encapsulated. This allows the support beams 2 and movable positioning rods 3 to be reused, effectively saving costs.

[0069] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An auxiliary positioning device, characterized in that, Includes the housing, supporting beams, and movable positioning rods; At least one wall of the box body is provided with the supporting crossbeam; The movable positioning rod is located inside the box, and the movable positioning rod is detachably connected to the supporting crossbeam; The supporting crossbeam is provided with a first slot, and the movable positioning rod is inserted and fixed in the first slot; Alternatively, the movable positioning rod is provided with a second slot, and the supporting crossbeam is inserted and fixed in the second slot; Alternatively, the supporting crossbeam may have a first slot, and the movable positioning rod may have a second slot, with the first slot and the second slot interlocking.

2. The auxiliary positioning device of claim 1, wherein, The auxiliary positioning device also includes a fixed positioning rod, which is located inside the box. At least one wall of the box body is provided with the fixed positioning rod, and the box wall where the fixed positioning rod is located and the box wall where the supporting crossbeam is located are two box walls that are arranged opposite to each other.

3. The auxiliary positioning device of claim 1, wherein, Each of the box walls is provided with multiple supporting beams, which are arranged along the vertical direction of the box body.

4. The auxiliary positioning device of claim 1, wherein, There is a filling gap at the insertion point between the supporting crossbeam and the movable positioning rod; The auxiliary positioning device also includes a flexible pad, which is disposed within the filling gap so that the movable positioning rod contacts the single battery inside the box.

5. The auxiliary positioning device of claim 4, wherein, The gap depth of the filling gap is 4.5-5.5mm.

6. The auxiliary positioning device of claim 4, wherein, The supporting beam includes a beam body and two fixing blocks extending from both ends of the beam body in opposite directions; The two fixing blocks are detachably installed on the same wall of the box body; The first slot is disposed on the main body of the crossbeam.

7. The supplemental positioning device of claim 2, wherein, The auxiliary positioning device also includes an extension rod, which is detachably mounted on the top of the fixed positioning rod.

8. The supplemental positioning device of claim 1, wherein, The top of the movable positioning rod is provided with a clearance groove, and the auxiliary positioning device also includes a limiting block; The limiting block is installed at the top of the box and abuts against the clearance groove.

9. A stack press assembly characterized by, It includes two auxiliary positioning devices as described in any one of claims 1-8; one of the auxiliary positioning devices is installed on two first walls of the housing, and the other auxiliary positioning device is installed on two second walls of the housing, wherein the two first walls are two walls of the housing arranged opposite to each other along a first direction, and the two second walls are two walls of the housing arranged opposite to each other along a second direction.

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