Pile pull rod device

Abstract

The utility model provides an electric pile pull rod device which comprises a bare pile unit and a pull rod, the bare pile unit comprises a first end plate and a second end plate, and the first end plate and the second end plate are arranged at an interval and define a clamping space for clamping and fixing a reactor core; one end of the pull rod is fixedly mounted on the first end plate, an adjusting positioning part is arranged on the pull rod, and the adjusting positioning part is used for connecting the second end plate to different positions in the length direction of the pull rod so as to adjust the distance between the second end plate and the first end plate. The galvanic pile pull rod device can solve the problem that a galvanic pile pull rod device in the prior art is low in universality.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery stack pull rod device. Background Art

[0002] Currently, fuel cell stacks are often secured using a tie-rod packaging system. When using this system, the stack core (cell assembly) is primarily secured using a fixed tie-rod length. Different numbers of cells in the stack require tie-rods of varying lengths, resulting in poor tie-rod versatility, complex materials, waste of resources, and increased manufacturing costs. Furthermore, these fixed-length tie-rods have poor impact and deformation resistance.

[0003] A patent search revealed that Chinese patent document CN220963420U discloses a fuel cell stack assembly, which includes: a cell stack body; a first pressure plate and a second pressure plate that are opposite and spaced apart along a first direction; a pull rod assembly that includes a fixed seat, an elastic member, and a pull rod, wherein the fixed seat is located between the first and second pressure plates, one end of the pull rod is fixed to the second pressure plate, and the other end of the pull rod extends into the fixed seat, and the elastic member is compressed between the fixed seat and the pull rod to drive the pull rod to move toward the first pressure plate along the first direction. Through the cooperation of the first pressure plate, the second pressure plate, and the pull rod assembly, the elastic force of the elastic member in the pull rod assembly can drive the pull rod to move the second pressure plate toward the first pressure plate, which is beneficial for maintaining appropriate compression of the cell stack body, automatically compensating for compression loss of the cell stack body due to aging, and keeping the compression load and stiffness of the cell stack body within a reasonable range, thereby improving the sealing and conductivity of the fuel cell. Although the battery stack is fixed by a pull rod, the length of the pull rod is fixed. When the number of single cells in the battery stack needs to be changed, the pull rod is no longer applicable. The versatility of the pull rod is relatively low. For this reason, we propose a battery stack pull rod device. Utility Model Content

[0004] A technical problem to be solved by the present disclosure is that fixed-length stack tie rods have poor versatility, poor impact resistance and poor deformation resistance when installing and fixing the core.

[0005] To solve the above technical problems, the present disclosure provides a stack pull rod device, comprising:

[0006] A bare stack unit, the bare stack unit comprising a first end plate and a second end plate, the first end plate and the second end plate being spaced apart and surrounding each other to form a clamping space for clamping and fixing the core;

[0007] A pull rod, one end of which is fixedly mounted on the first end plate. The pull rod is provided with an adjustment positioning portion, which is used to connect the second end plate to different positions in the length direction of the pull rod to adjust the distance between the second end plate and the first end plate.

[0008] In some embodiments, a plurality of first connection parts are provided at one end of the pull rod, and the first connection part includes a fixed connection hole and a first connection member, and the first connection member is fixedly connected to the first end plate after passing through the fixed connection hole.

[0009] In some embodiments, the first end plate is provided with a first mounting groove for mounting the pull rod, and a limiting protrusion for limiting one end of the pull rod to the first mounting groove is provided on a side wall of the first mounting groove.

[0010] In some embodiments, the pull rod is fixedly mounted in the first mounting groove via a first connecting member, and a surface of the pull rod is flush with a surface of the first end plate.

[0011] In some embodiments, the adjustment and positioning portion includes multiple second connecting portions, the second connecting portion includes a waist-shaped hole and a second connecting piece, the waist-shaped hole extends along the length direction of the pull rod, and the second connecting piece passes through the waist-shaped hole and is connected to the second end plate.

[0012] In some embodiments, the second end plate is provided with a second mounting groove for mounting the pull rod, and the surface of the pull rod is flush with the surface of the second end plate.

[0013] In some embodiments, a bending portion is provided at one end of the pull rod away from the first end plate, and an auxiliary locking piece is provided on the bending portion. The auxiliary locking piece can be reciprocated and extended along the length direction of the pull rod to abut against the second end plate.

[0014] In some embodiments, a threaded hole is provided on the bent portion, and the auxiliary locking member includes a screw segment threaded into the threaded hole, and the screw segment can reciprocate and extend along the length direction of the pull rod to be used to abut against the second end plate.

[0015] In some embodiments, the screw segment comprises a screw having a round head tip.

[0016] In some embodiments, a plurality of tie rods are symmetrically arranged at opposite ends of the bare stack unit, and the length direction of each tie rod is arranged along the first direction.

[0017] Through the above technical solution, the stack tie rod device provided by the present invention solves the problem of poor versatility, impact resistance and deformation resistance of fixed-length stack tie rods during core installation by providing a tie rod with an adjustable positioning portion. The tie rod can flexibly adjust the position of the second end plate in the length direction by adjusting the positioning portion, thereby adapting to cores of different sizes, significantly improving the versatility and adaptability of the device. In addition, the connection structure design of the tie rod and the first end plate and the second end plate, such as the first mounting groove, the limiting protrusion and the waist-shaped hole, not only enhances the stability of the connection, but also ensures that the tie rod is flush with the surface of the end plate, which is beneficial to the compactness and aesthetics of the overall structure. The design of the auxiliary locking piece on the bent portion further enhances the support and locking effect of the tie rod on the second end plate, and improves the impact resistance and deformation resistance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 Schematic diagram of the structure of the stack pull rod device disclosed in the embodiment of the present disclosure;

[0020] Figure 2 It is an exploded view of the pull rod disclosed in the embodiment of the present disclosure.

[0021] Description of reference numerals:

[0022] 1. Bare stack unit; 11. First end plate; 111. First mounting groove; 1111. Limiting protrusion; 12. Second end plate; 121. Second mounting groove; 2. Pull rod; 21. Adjusting and positioning portion; 211. Second connecting portion; 2111. Waist-shaped hole; 2112. Second connecting piece; 22. First connecting portion; 221. Fixed connecting hole; 222. First connecting piece; 23. Bending portion; 231. Auxiliary locking piece; 3. Core; 4. Current collecting plate; 41. First current collecting plate; 42. Second current collecting plate. DETAILED DESCRIPTION

[0023] The following embodiments of the present disclosure are further described in detail with reference to the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are intended to illustrate the principles of the present disclosure, but are not intended to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but rather includes all technical solutions within the scope of the claims.

[0024] The present disclosure provides these embodiments in order to make this disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values ​​set forth in these embodiments should be interpreted as merely exemplary, and not as limiting.

[0025] It should be noted that, in the description of this disclosure, unless otherwise specified, "plurality" means greater than or equal to two; terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are intended solely to facilitate and simplify the description of this disclosure, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0026] In addition, the terms "first," "second," and similar terms used in this disclosure do not denote any order, quantity, or importance, but are merely used to distinguish different parts. "Perpendicular" does not mean perpendicular in the strict sense, but rather means within the tolerance range. "Parallel" does not mean parallel in the strict sense, but rather means within the tolerance range. "Include" or "comprising" and similar terms mean that the elements preceding the term include the elements listed after the term, and do not exclude the possibility of also including other elements.

[0027] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this disclosure depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intervening device between the specific device and the first or second device.

[0028] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined as such herein.

[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0030] See also Figures 1 to 2 As shown, according to an embodiment of the present application, a fuel cell stack tie rod device is provided, comprising a bare stack unit 1 and a tie rod 2. The bare stack unit 1 comprises a first end plate 11 and a second end plate 12, which are spaced apart and enclose a clamping space for clamping and fixing the core 3. One end of the tie rod 2 is fixedly mounted on the first end plate 11, and an adjustment positioning portion 21 is provided on the tie rod 2. The adjustment positioning portion 21 is used to connect the second end plate 12 to different positions in the length direction of the tie rod 2 to adjust the distance between the second end plate 12 and the first end plate 11.

[0031] In this embodiment, by providing an adjustable positioning portion 21 on the tie rod 2, the second end plate 12 can be conveniently connected to different positions of the tie rod 2, so that the spacing between the second end plate 12 and the first end plate 11 can be precisely adjusted as needed to meet the clamping requirements of different cores 3. The flexible adjustment of the spacing allows the device to be applicable to cores of different sizes and with different compression requirements, improving the versatility and adaptability of the device. The first end plate 11 and the second end plate 12 are spaced apart and enclosed to form a clamping space, which can stably clamp and fix the core 3 and prevent it from moving or deforming during operation. The tie rod 2 serves as a connecting and supporting component, and its strength and stability further enhance the stability of the entire clamping system, ensuring that the core can maintain stable performance in the operating state. The design of the adjustable positioning portion 21 makes the installation and adjustment process simple and quick, and can be completed without complex tools or tedious steps. When the core needs to be repaired or replaced, the spacing can be easily adjusted and the core can be removed by adjusting the positioning portion 21, reducing the difficulty and cost of maintenance.

[0032] In some embodiments, a plurality of first connection parts 22 are provided at one end of the pull rod 2 . The first connection part 22 includes a fixed connection hole 221 and a first connection member 222 . The first connection member 222 is fixedly connected to the first end plate 11 after passing through the fixed connection hole 221 .

[0033] In this embodiment, the design of multiple first connecting portions 22 further stabilizes the connection between the tie rod 2 and the first end plate 11. Compared to a single-point connection, multiple-point fixation disperses the applied force, reducing the risk of connection failure due to excessive force at a single point. This ensures that the tie rod 2 is subjected to more even tension or compression, avoiding localized stress concentration and thus improving the stability and durability of the connection. The first connecting member 222 is inserted through the fixed connection hole 221 to secure the connection, improving the installation efficiency of the tie rod 2.

[0034] In some embodiments, the first end plate 11 is provided with a first mounting groove 111 for mounting the pull rod 2 , and a limiting protrusion 1111 is provided on the side wall of the first mounting groove 111 for limiting one end of the pull rod 2 to the first mounting groove 111 .

[0035] In this embodiment, the first mounting groove 111 provides a precise mounting position for one end of the pull rod 2, ensuring that the pull rod can be accurately aligned and inserted during the installation process. The setting of the limiting protrusion 1111 effectively limits the movement of the pull rod 2 in the first mounting groove 111, preventing it from loosening during operation and affecting the connection stability of the first connecting member. Through the coordinated use of the first mounting groove 111 and the limiting protrusion 1111, the connection between the pull rod 2 and the first end plate 11 is tighter and firmer, which enhances the structural strength of the entire stack pull rod device, helps to reduce the loosening or deformation of components caused by vibration or external force, and improves the stability and reliability of the entire device.

[0036] In some embodiments, the pull rod 2 is fixedly mounted in the first mounting groove 111 via a first connecting member 222 , and the surface of the pull rod 2 is flush with the surface of the first end plate 11 .

[0037] In this embodiment, the first connector 222 secures the tie rod 2 within the first mounting slot 111, enhancing its secure installation. The flushness of the tie rod 2 with the surface of the first end plate 11 helps reduce the device's footprint and make the overall structure more compact. This flushness prevents the risk of collision or scratching caused by the protruding tie rod, improving safety during use. This helps reduce the risk of the tie rod loosening or falling off due to external forces, further ensuring the stability and reliability of the device.

[0038] In some embodiments, the first connector 222 comprises a connecting screw or bolt, which ensures a secure and reliable connection between the tie rod 2 and the first end plate 11. The tightening action of the connecting screw or bolt securely secures the connection between the tie rod and the first end plate, effectively preventing loosening due to vibration or external forces. The installation and removal of the connecting screw or bolt is relatively simple and quick, facilitating subsequent maintenance and replacement.

[0039] In some embodiments, the adjustment and positioning portion 21 includes a plurality of second connecting portions 211. The second connecting portion 211 includes a waist-shaped hole 2111 and a second connecting member 2112. The waist-shaped hole 2111 extends along the length of the pull rod 2. The second connecting member 2112 passes through the waist-shaped hole 2111 and is connected to the second end plate 12. The waist-shaped hole 2111 is within a recessed groove of the second connecting portion 211. When the second connecting member 2112 passes through the waist-shaped hole 2111, the top of the second connecting member 2112 is lower than the outer surface of the second connecting portion 211.

[0040] In this embodiment, the design of the waist-shaped hole 2111 can allow the second connecting member 2112 to slide within a certain range in the hole along the length direction of the pull rod 2, thereby achieving fine-tuning of the position of the pull rod 2, so that the best position configuration can be found under different working conditions or installation conditions. By adjusting the position of the second connecting member 2112 in the waist-shaped hole 2111, it is possible to adapt to the installation requirements of components of different sizes or shapes, thereby improving the versatility and adaptability of the entire device. Through the close fit between the second connecting member 2112 and the waist-shaped hole 2111, the risk of loosening due to vibration or impact can be effectively reduced, ensuring the stability and reliability of the connection. The waist-shaped hole 2111 is designed in the sink, and the top of the second connecting member 2112 is lower than the outer surface of the second connecting part 211 when passing through, which can effectively protect the second connecting member from the direct influence of the external environment, while improving the compactness and safety of the connection part.

[0041] In some embodiments, the second end plate 12 is provided with a second mounting groove 121 for mounting the pull rod 2 , and the surface of the pull rod 2 is flush with the surface of the second end plate 12 .

[0042] In this embodiment, a second mounting groove 121 for mounting the tie rod 2 is provided on the second end plate 12. The second mounting groove 121 provides a precise mounting position and guide for the tie rod 2, enabling accurate alignment and insertion of the tie rod during installation, thereby avoiding installation deviations. This helps to securely secure the tie rod to the second end plate 12, preventing it from slipping or loosening during operation, and ensuring the stability and reliability of the connection. By arranging the surface of the tie rod 2 flush with the second end plate 12, the risks of scratches and collisions caused by the protrusion of the tie rod are avoided, thereby improving safety during use.

[0043] In some embodiments, the second connecting member 2112 includes a connecting screw or bolt, which enhances the stability and reliability of the connection between the tie rod 2 and the second end plate 12. This not only effectively prevents the tie rod from slipping or loosening during operation, but also allows the position of the tie rod to be fine-tuned by adjusting the tightness of the screw or bolt to adapt to different installation conditions and working requirements.

[0044] In some embodiments, a bending portion 23 is provided at one end of the pull rod 2 away from the first end plate 11 , and an auxiliary locking member 231 is provided on the bending portion 23 . The auxiliary locking member 231 can reciprocate and extend along the length direction of the pull rod 2 to abut against the second end plate 12 .

[0045] In this embodiment, the design of the bending portion 23 and the auxiliary locking member 231 thereon can firmly abut against the second end plate 12 through the reciprocating telescopic function along the length direction of the pull rod 2, thereby enhancing the locking stability between the pull rod 2 and the second end plate 12, reducing the risk of loosening due to vibration or external force, and improving the stability and safety of the entire structure. The retractable design of the auxiliary locking member 231 allows its position to be flexibly adjusted during the installation process to adapt to different installation environments and needs. By adjusting the telescopic length of the auxiliary locking member 231, the connection tightness between the pull rod 2 and the second end plate 12 can be adjusted to a certain extent, thereby increasing the adaptability of the stack pull rod device in different application scenarios.

[0046] In some embodiments, a threaded hole is provided on the bending portion 23 , and the auxiliary locking member 231 includes a screw segment screwed into the threaded hole. The screw segment can reciprocate and extend along the length direction of the pull rod 2 to abut against the second end plate 12 .

[0047] In this embodiment, by providing a threaded hole on the bent portion 23 and providing a screw segment screwed therein, the auxiliary locking member can be precisely adjusted and firmly locked along the length of the pull rod, ensuring a stronger connection between the pull rod and the second end plate, effectively resisting loosening due to vibration and external forces, and improving the stability and safety of the overall structure. The threaded design of the screw segment can easily adjust its extended length as needed to adapt to different installation environments and tightening requirements. The characteristics of the threaded connection enable the screw segment to maintain high precision and stability during the extension and retraction process, thereby achieving precise control of the locking position, helping to reduce performance degradation due to installation errors or loosening, and ensuring the working efficiency and reliability of the device.

[0048] In some embodiments, the screw segment comprises a screw having a round head tip.

[0049] In this embodiment, the use of a screw with a round head nail tip effectively avoids scratches or damage to the second end plate 12 during installation or removal. The soft shape of the round head nail tip reduces friction and impact with the second end plate.

[0050] In some embodiments, a plurality of tie rods 2 are symmetrically arranged at opposite ends of the bare stack unit 1, and the length direction of the plurality of tie rods 2 is along the first direction (eg Figure 1 The direction indicated by the X-axis is shown in the figure).

[0051] In this embodiment, a plurality of tie rods 2 extending in a first direction are symmetrically positioned at opposite ends of the bare stack unit 1. This ensures uniform stress distribution within the bare stack unit 1 when subjected to load, effectively preventing structural damage caused by localized stress concentration and improving overall structural stability and durability. Multiple tie rods 2 increase structural redundancy. Even if one tie rod fails, the remaining tie rods can continue to bear the load, enhancing the structural strength of the bare stack unit 1.

[0052] In some embodiments, a current collecting plate 4 for collecting the current generated by the core is provided on one side of the first end plate 11 and the second end plate 12 close to the clamping space. The current collecting plate 4 includes a first current collecting plate 41 and a second current collecting plate 42. The first current collecting plate 41 is fixed to the side of the first end plate 11 close to the clamping space, and the second current collecting plate 42 is fixed to the side of the second end plate close to the clamping space.

[0053] In this embodiment, a first current collecting plate 41 and a second current collecting plate 42 are respectively provided on one side of the first end plate 11 and the second end plate 12 close to the clamping space, which can significantly improve the efficiency of current collection and distribution inside the battery stack. As a key component for current conduction, the effective arrangement of the current collecting plate 4 can ensure that the current flows evenly and quickly from each single cell to the end plate, and then is led out from the end plate to the external circuit. The first current collecting plate 41 and the second current collecting plate 42 are respectively fixed to the corresponding sides of the first end plate 11 and the second end plate 12, which not only enhances the stability of the structure, but also optimizes the current path and reduces energy loss. It helps to reduce the resistance difference between single cells and improve the overall output voltage and power density of the battery stack.

[0054] Thus far, various embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

[0055] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art will understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced with equivalents without departing from the scope and spirit of the present disclosure. In particular, as long as there are no structural conflicts, the various technical features mentioned in the various embodiments may be combined in any manner.

Claims

1. A stack pull rod device, characterized in that: include: A bare stack unit (1), comprising a first end plate (11) and a second end plate (12), wherein the first end plate (11) and the second end plate (12) are spaced apart and enclose a clamping space for clamping and fixing a core (3); A pull rod (2), one end of which is fixedly mounted on the first end plate (11); an adjustment positioning portion (21) is provided on the pull rod (2); the adjustment positioning portion (21) is used to connect the second end plate (12) to different positions in the length direction of the pull rod (2) to adjust the distance between the second end plate (12) and the first end plate (11).

2. The stack pull rod device according to claim 1, characterized in that: One end of the pull rod (2) is provided with a plurality of first connecting parts (22), the first connecting parts (22) comprising a fixed connection hole (221) and a first connecting member (222), and the first connecting member (222) is fixedly connected to the first end plate (11) after passing through the fixed connection hole (221).

3. The stack pull rod device according to claim 2, characterized in that: The first end plate (11) is provided with a first mounting groove (111) for mounting the pull rod (2), and a limiting protrusion (1111) for limiting one end of the pull rod (2) to the first mounting groove (111) is provided on a side wall of the first mounting groove (111).

4. The stack pull rod device according to claim 3, characterized in that: The pull rod (2) is fixedly mounted in the first mounting groove (111) via the first connecting member (222), and the surface of the pull rod (2) is flush with the surface of the first end plate (11).

5. The stack pull rod device according to claim 1, characterized in that: The adjustment and positioning portion (21) includes a plurality of second connecting portions (211), each of the second connecting portions (211) including a waist-shaped hole (2111) and a second connecting member (2112), wherein the waist-shaped hole (2111) extends along the length direction of the pull rod (2), and the second connecting member (2112) passes through the waist-shaped hole (2111) and is connected to the second end plate (12).

6. The stack pull rod device according to claim 5, characterized in that: The second end plate (12) is provided with a second mounting groove (121) for mounting the pull rod (2), and the surface of the pull rod (2) is flush with the surface of the second end plate (12).

7. The stack pull rod device according to claim 6, characterized in that: A bending portion (23) is provided at one end of the pull rod (2) facing away from the first end plate (11), and the bending portion (23) is provided with an auxiliary locking piece (231). The auxiliary locking piece (231) can be reciprocated and extended along the length direction of the pull rod (2) to be used to abut against the second end plate (12).

8. The stack pull rod device according to claim 7, characterized in that: A threaded hole is provided on the bending portion (23), and the auxiliary locking member (231) includes a screw segment screwed into the threaded hole. The screw segment can reciprocate and extend along the length direction of the pull rod (2) to abut against the second end plate (12).

9. The stack pull rod device according to claim 8, characterized in that: The screw rod section comprises a screw, and the nail tip of the screw is a round head nail tip.

10. The stack pull rod device according to any one of claims 1 to 9, characterized in that: A plurality of tie rods (2) are symmetrically arranged at opposite ends of the bare stack unit (1), and the length direction of each tie rod (2) is arranged along the first direction.

Images