A hydrogen fuel cell stack protection structure with packaging pressure regulation function

Abstract

The present invention relates to a hydrogen fuel cell stack protective structure with a package pressure adjustment function, comprising a plurality of packages, each of which is provided with a connector, a socket and an adjustment assembly; the adjustment assembly comprises a worm, a worm wheel and a drive member, and the connector and the socket are used to connect two adjacent packages by plugging together. When the package pressure needs to be adjusted, the operator drives the worm wheel by rotating the worm, and the worm wheel drives the drive member. The drive member and the connector can adopt a transmission method such as the meshing of a gear and a rack to convert the rotational motion of the worm wheel into the linear motion of the connector, so that the connector is inserted into the socket or withdrawn a certain distance outward, thereby achieving separate adjustment of the pressure between the two adjacent packages, accurately compensating for uneven pressure caused by factors such as assembly tolerances and different fuel cell attenuation levels, and improving the overall pressure uniformity of the stack.

Description

Technical Field

[0001] The present invention relates to the technical field related to fuel cells, and in particular to a hydrogen fuel cell stack protection structure with a packaging pressure regulating function. Background Art

[0002] Existing hydrogen fuel cell stacks generally use an integral end plate with a through screw or strap to compress multiple packages containing batteries to ensure the fit and sealing of core components such as bipolar plates and electrolyte membranes; however, each unit package inevitably has dimensional tolerances and assembly deviations during the manufacturing and assembly process. Simply relying on the axial locking method of the integral end plate is difficult to accurately match the actual pressure requirements of each package, which can easily lead to local packaging pressure imbalance. In order to improve the problem of uneven packaging pressure.

[0003] For example, Chinese patent authorization announcement No. CN114447392B discloses a hydrogen fuel cell stack protection system, which includes two end plates and multiple battery cells, and multiple staggered first frames and second frames are provided between the two end plates. The battery cells are respectively fixed on the inner sides of the first frame and the second frame to form an assembly. By providing a pressurizing propulsion mechanism on the side wall of the end plate and a steering expansion mechanism on one side of the assembly, the packaging pressure between two adjacent battery cells can be adjusted to make the packaging pressure more uniform. Although this solution can improve the overall pressure uniformity and avoid abnormal fuel cell resistance, thermal resistance and mass transfer resistance caused by uneven pressure, all packages are still pressurized synchronously during the pressurization process, and the influence of the assembly size tolerance is not considered. The pressure between two adjacent packages cannot be adjusted independently, and the problem of local pressure imbalance has not been fundamentally solved. Summary of the Invention

[0004] In response to the above problems, a hydrogen fuel cell stack protection structure with a packaging pressure adjustment function is provided. The present invention applies the arrangement of a connector and a socket, so that two adjacent packaging bodies can achieve a preliminary connection through the cooperation of the connector and the socket. When it is necessary to adjust the packaging pressure between adjacent packaging bodies, the operator drives the worm wheel by rotating the worm, and the worm wheel drives the driving member. The driving member and the connector can adopt a transmission method such as the meshing of a gear and a rack to convert the rotational motion of the worm wheel into the linear motion of the connector, so that the connector can penetrate deeper into the socket or withdraw outward a certain distance, thereby achieving separate adjustment of the pressure between the two adjacent packaging bodies. It can accurately compensate for the uneven pressure caused by factors such as assembly tolerances and different fuel cell attenuation levels, and improve the overall pressure uniformity of the stack.

[0005] In order to solve the problems of the prior art, the present invention provides a hydrogen fuel cell stack protection structure with a packaging pressure regulating function, including a plurality of packaging bodies for accommodating fuel cells, and each packaging body is provided with a connector and a plug-in slot on two opposite sides, and two adjacent packaging bodies are plugged into and matched with the plug-in slot through the connector; an installation cavity is provided in the plug-in slot, and an adjustment component for adjusting the packaging pressure between two adjacent packaging bodies is provided in the installation cavity; the adjustment component includes a rotatable worm and a worm wheel meshingly connected to the worm, and a driving member connected to the worm wheel is provided on the side of the worm wheel, and the driving member is used to drive the connector to make linear displacement along its plug-in direction; an adjustment hole for operating the rotation of the worm is provided on the side of the packaging body adjacent to the connector.

[0006] Preferably, the driving member is configured as a gear that rotates coaxially with the worm gear, and the plug-in member is configured as a rack that meshes with the gear, and the rack extends along the plug-in direction.

[0007] Preferably, a mounting frame that can move along the axial direction of the worm is provided in the mounting cavity, and the mounting frame is elastically connected to the mounting cavity. The worm, worm wheel and driving member are all arranged on the mounting frame, and a positioning component for locking the axial position of the worm is provided in the mounting cavity.

[0008] Preferably, the positioning assembly includes a positioning hole coaxially arranged with the worm, and the positioning hole is arranged on the side of the installation cavity relative to the adjustment hole. A plurality of positioning rods elastically connected to the positioning hole and capable of sliding radially along the positioning hole are arranged on the side wall of the positioning hole, and a clip is arranged on the end of the worm near the positioning hole.

[0009] Preferably, the end of the positioning rod close to the worm is a wedge-shaped block, the inclined surface of the wedge-shaped block faces one side of the worm, and the clamping piece is a conical structure.

[0010] Preferably, a slider that can slide along the axis of the worm is provided beside the clamping part. The slider is elastically connected to the worm. The slider is a conical block that is mirror-symmetrical to the conical structure of the clamping part, and a gap is left between the slider and the clamping part.

[0011] Preferably, the plug-in component is rotatably arranged on the packaging body, and the packaging body is provided with an avoidance groove for accommodating the plug-in component.

[0012] Preferably, a plurality of connectors and a plurality of connector slots are provided, and the plurality of connectors and connector slots can be evenly distributed along the circumference of the package body, and a corresponding adjustment component is provided in each connector slot.

[0013] Preferably, end plates are provided at both ends of the battery stack formed by stacking a plurality of packaging bodies in the length direction, and a locking member for pressing and fixing the battery stack as a whole is provided between the two end plates.

[0014] Preferably, a detachable cover plate for maintaining the installation cavity is provided below the plug-in slot.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention adopts the arrangement of a connector and a socket, so that two adjacent packaging bodies are preliminarily connected through the cooperation of the connector and the socket. When it is necessary to adjust the packaging pressure between the adjacent packaging bodies, the operator applies a torque to the worm through the adjustment hole, thereby driving the worm wheel to rotate. The worm wheel drives the driving member, and the driving member and the connector can adopt a transmission method such as the engagement of a gear and a rack to convert the rotational motion of the worm wheel into the linear motion of the connector, so that the connector goes deeper into the socket or withdraws a certain distance outward, thereby realizing the separate adjustment of the pressure between the two adjacent packaging bodies. It can accurately compensate for the uneven pressure problem caused by factors such as assembly tolerance and different attenuation levels of fuel cells, improve the overall pressure uniformity of the fuel cell stack, reduce the influence of abnormal resistance, thermal resistance and mass transfer resistance on the performance of the fuel cell stack, and extend the service life. The adjustment component adopts standardized mechanical transmission components such as worms and worm wheels, and does not require customized processing, which significantly reduces manufacturing costs, ensures the stability of the transmission process, reduces adjustment deviation and improves system reliability.

[0017] 2. The present invention realizes the engagement and disengagement of the gear and the rack by the displacement of the mounting frame, and locks the axial position of the worm by the positioning assembly, thereby preventing accidental transmission in the non-adjustment state and ensuring the power transmission efficiency during adjustment, effectively solving the problem of transmission jamming caused by the self-locking of the worm and worm gear when the rack is inserted, and realizing the unity of accuracy, reliability and ease of operation of the package pressure adjustment.

[0018] 3. The present invention application arranges multiple connectors, sockets and adjustment components uniformly distributed along the circumference of the package body, which can achieve multi-point control of the packaging pressure between two adjacent packages, eliminate local stress concentration through symmetrical layout, significantly improve the force uniformity of seals, electrodes and other components inside the fuel cell stack, and extend the overall service life of the stack; the arrangement of multiple groups of adjustment components forms a redundant arrangement, even if individual components fail, other components can still maintain basic pressure regulation functions, thereby improving the reliability and fault tolerance of the system; the evenly distributed sockets and connectors can also enhance the mechanical connection stiffness between the packages, reduce the relative displacement under vibration conditions, and further optimize the structural stability of the fuel cell stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic diagram of a three-dimensional structure of a hydrogen fuel cell stack protective structure with a packaging pressure regulating function after multiple packaging bodies are stacked.

[0020] Figure 2This is a schematic diagram of the three-dimensional structure of two packages in a hydrogen fuel cell stack protection structure with package pressure regulation function after being plugged in and matched. Figure 1 .

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of two packages in a hydrogen fuel cell stack protection structure with package pressure regulation function after being plugged in and matched. Figure 2 .

[0022] Figure 4 The present invention is a schematic diagram of a three-dimensional cross-sectional structure of a package body in a hydrogen fuel cell stack protection structure with a package pressure regulating function.

[0023] Figure 5 The present invention is a schematic diagram of the cross-sectional structure of a worm gear in a hydrogen fuel cell stack protective structure with a packaging pressure regulating function when the worm gear moves toward a positioning hole.

[0024] Figure 6 The present invention is a schematic diagram of the cross-sectional structure of a hydrogen fuel cell stack protection structure with a package pressure regulating function when a worm is locked by a positioning assembly.

[0025] Figure 7 The present invention is a schematic diagram of the cross-sectional structure of a positioning component in a hydrogen fuel cell stack protective structure with a package pressure regulating function when the positioning component is unlocked.

[0026] Figure 8 This is a schematic diagram of the cross-sectional structure of the package installation cavity in a hydrogen fuel cell stack protection structure with package pressure regulation function. Figure 1 .

[0027] Figure 9 This is a schematic diagram of the cross-sectional structure of the package installation cavity in a hydrogen fuel cell stack protection structure with package pressure regulation function. Figure 2 .

[0028] Figure 10 The present invention is a three-dimensional structural diagram of a regulating component in a hydrogen fuel cell stack protective structure with a packaged pressure regulating function.

[0029] The numbers in the figure are:

[0030] 1. Package body; 11. Connecting slot; 111. Mounting cavity; 1111. Cover plate; 112. Mounting frame; 12. Adjusting assembly; 121. Worm; 1211. Connecting piece; 1212. Slider; 122. Worm gear; 1221. Driving piece; 12212. Gear; 123. Adjusting hole; 13. Connecting piece; 132. Rack; 133. Avoiding groove; 14. Positioning assembly; 141. Positioning hole; 142. Positioning rod; 1421. Wedge block; 15. End plate; 151. Locking piece. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0032] like Figures 1 to 4 、 Figures 8 to 10 As shown: A hydrogen fuel cell stack protection structure with a packaging pressure regulation function, comprising a plurality of packaging bodies 1 for accommodating fuel cells, wherein a connector 13 and a plug-in slot 11 are respectively provided on opposite sides of each packaging body 1, and two adjacent packaging bodies 1 are plugged into and matched with the plug-in slot 11 through the connector 13; a mounting cavity 111 is provided in the plug-in slot 11, and a regulating component 12 for regulating the packaging pressure between two adjacent packaging bodies 1 is provided in the mounting cavity 111; the regulating component 12 comprises a rotatable worm 121 and a worm wheel 122 meshingly connected to the worm 121, and a driving member 1221 connected to the worm wheel 122 is provided on the side of the worm wheel 122, and the driving member 1221 is used to drive the connector 13 to perform linear displacement along its plug-in direction; an regulating hole 123 for operating the rotation of the worm 121 is provided on the side of the packaging body 1 adjacent to the connector 13.

[0033] The arrangement of the connector 13 and the insertion slot 11 allows two adjacent packaging bodies 1 to be preliminarily connected through the cooperation of the connector 13 and the insertion slot 11. The insertion slot 11 has a mounting cavity 111 inside, and the adjustment assembly 12 is integrated into the mounting cavity 111. An external tool can be inserted through the adjustment hole 123 on the packaging body 1 to operate the worm 121 to rotate.

[0034] When it is necessary to adjust the packaging pressure between two adjacent packaging bodies 1, the operator applies a torque to the worm 121 through the adjustment hole 123. When the worm 121 rotates, it drives the synchronous rotation of the worm wheel 122 through the meshing relationship, and the driving member 1221 connected to the side of the worm wheel 122 moves accordingly, thereby driving the connector 13 to make a linear displacement along the plug-in direction.

[0035] The adjustment component 12 of each package body 1 is independently arranged in the installation cavity 111 of the plug-in slot 11. The worm 121 can be operated through the adjustment hole 123 to achieve separate adjustment of the pressure between two adjacent packages 1. It can accurately compensate for the uneven pressure caused by factors such as assembly tolerances and different degrees of fuel cell attenuation, improve the overall pressure uniformity of the stack, reduce the impact of abnormal resistance, thermal resistance and mass transfer resistance on the performance of the stack, and extend the service life. The adjustment component 12 uses standardized mechanical transmission components such as the worm 121 and the worm wheel 122, and does not require customized processing, which significantly reduces manufacturing costs, ensures the stability of the transmission process, reduces adjustment deviations, and improves system reliability. The layout of the installation cavity 111 and the adjustment hole 123 fully utilizes the side space of the package body 1, making the structure compact and highly adaptable, and suitable for high-density stacked fuel cell stacks.

[0036] like Figures 1 to 4 、 Figures 8 to 10 As shown, the driving member 1221 is configured as a gear 12212 that rotates coaxially with the worm gear 122, and the plug-in member 13 is configured as a rack 132 that meshes with the gear 12212, and the rack 132 extends along the plug-in direction.

[0037] When the pressure between two adjacent packaging bodies 1 needs to be adjusted, the worm 121 is driven to rotate by an external tool, which in turn drives the worm wheel 122 to rotate. Since the gear 12212 is coaxially mounted with the worm wheel 122, the gear 12212 rotates at the same angular velocity as the worm wheel 122. The teeth of the gear 12212 mesh with the rack 132, which serves as the connector 13, converting the rotational motion of the gear 12212 into the linear motion of the rack 132. When the gear 12212 rotates clockwise, the rack 132 moves toward the inside of the plug-in slot 11, pushing the two adjacent packaging bodies 1 closer together and increasing the packaging pressure. When the gear 12212 rotates counterclockwise, the rack 132 retreats toward the outside of the plug-in slot 11, increasing the distance between the two adjacent packaging bodies 1 and reducing the packaging pressure. After the worm 121 stops rotating, the meshing position of the gear 12212 and the rack 132 is locked based on the self-locking characteristics of the transmission between the worm 121 and the worm wheel 122, and the rack 132 maintains the current displacement state, thereby stably maintaining the adjusted packaging pressure.

[0038] As standard components in the field of mechanical transmission, gear 12212 and rack 132 feature mature processing technology and high-precision mating characteristics. They can be directly applied without customized design, significantly reducing the manufacturing cost and assembly error of the adjustment assembly 12. The rigid meshing transmission of gear 12212 and rack 132 enables precise displacement control without slipping, ensuring the linearity and repeatability of package pressure regulation and meeting the stringent pressure uniformity requirements of the fuel cell stack. Furthermore, the coaxial layout of gear 12212 and worm gear 122 makes the adjustment assembly 12 compact and can be integrated into the mounting cavity 111 of the plug-in slot 11, adapting to the high-density stack packaging format of the fuel cell stack. Rack 132, acting as a connector 13, directly mates with the plug-in slot 11 of the adjacent package body 1, achieving pressure regulation while also taking into account the mechanical connection function of the package body 1, simplifying the overall structure.

[0039] like Figures 2 to 9 As shown: a mounting frame 112 that can move along the axial direction of the worm 121 is provided in the mounting cavity 111, and the mounting frame 112 is elastically connected to the mounting cavity 111, the worm 121, the worm wheel 122 and the driving member 1221 are all provided on the mounting frame 112, and a positioning assembly 14 for locking the axial position of the worm 121 is provided in the mounting cavity 111.

[0040] When the rack 132 is inserted into the insertion slot 11, the rack 132 may drive the gear 12212 to rotate. However, due to the self-locking nature of the worm 121 and worm wheel 122 transmission, the gear 12212 may not be driven, thereby preventing the rack 132 from being inserted. Therefore, the gear 12212 and the rack 132 need to be separated from each other. Because the mounting bracket 112 is elastically connected to the mounting cavity 111, when the pressure between the two adjacent packages 1 is not adjusted, the mounting bracket 112 is supported on the adjustment hole 123. By pushing the worm 121 with an external tool, the displacement of the worm 121 can drive the movement of the mounting bracket 112, causing the mounting bracket 112 to move along the axis of the worm 121. The positioning assembly 14 is arranged on the opposite side of the adjustment hole 123. When the worm 121 moves to the positioning assembly 14, the positioning assembly 14 is activated and locks the axial position of the worm 121, so that the mounting bracket 112 remains in its current position. Because the worm gear 122 and gear 12212 are also mounted on the mounting bracket 112, the movement of the mounting bracket 112 allows the gear 12212 to move closer to the rack 132, causing the rack 132 to mesh with the gear 12212. At this point, the worm 121 is rotated, which drives the gear 12212 to rotate via the worm gear 122, and the gear 12212 drives the rack 132 to move in the insertion direction, thereby adjusting the pressure between the two adjacent packages 1.

[0041] The engagement and disengagement of the gear 12212 and the rack 132 are achieved through the displacement of the mounting frame 112, and the axial position of the worm 121 is locked by the positioning component 14, which not only prevents accidental transmission in the non-adjustment state, but also ensures the power transmission efficiency during adjustment, and effectively solves the problem of transmission jamming caused by the self-locking of the worm 121 and the worm wheel 122 when the rack 132 is inserted, thereby achieving the unity of accuracy, reliability and operational convenience in packaging pressure adjustment.

[0042] like Figures 2 to 9 and Figure 10 As shown: the positioning assembly 14 includes a positioning hole 141 coaxially arranged with the worm 121, and the positioning hole 141 is arranged on the side of the installation cavity 111 relative to the adjustment hole 123, and a plurality of positioning rods 142 elastically connected to the positioning hole 141 and capable of sliding radially along the positioning hole 141 are arranged on the side wall of the positioning hole 141, and a clamping piece 1211 is provided at the end of the worm 121 close to the positioning hole 141.

[0043] When an external tool pushes the worm 121 to move along the axis, the worm 121 drives the mounting bracket 112 to move synchronously toward the side where the positioning hole 141 is located. The clamping member 1211 at the end of the worm 121 is inserted into the positioning hole 141 along with the worm 121. Under the preload force of the elastic member, the multiple positioning rods 142 on the side wall of the positioning hole 141 always maintain a tendency to slide toward the center of the positioning hole 141. When the worm 121 moves to the set position, the positioning rods 142 are precisely aligned with the clamping member 1211 at the end of the worm 121. The elastic member pushes the positioning rods 142 to slide radially along the positioning hole 141, thereby fixing the clamping member 1211, thereby locking the axial position of the worm 121 and further fixing the mounting bracket 112, so that the driving member 1221 is in stable contact with the plug-in connector 13, facilitating the subsequent adjustment of the packaging pressure.

[0044] Through the cooperation of multiple positioning rods 142 and the clamping parts 1211 at the end of the worm 121, the precise locking of the axial position of the worm 121 is achieved. It avoids the problem of overloading that may be caused by single-point locking, significantly improves the vibration resistance and stability of the locking structure, and ensures that the adjusted packaging pressure will not drift due to the vibration during the operation of the fuel cell. When the worm 121 moves to the set position, the automatic engagement mechanism of the positioning rod 142 and the clamping part 1211 does not require additional manual locking steps, simplifies the pressure adjustment process, and improves on-site operation efficiency. After locking, the mounting bracket 112 is fixed, ensuring stable contact between the driving part 1221 and the plug-in part 13, avoiding the engagement failure of the transmission pair due to the displacement of the mounting bracket 112, and providing rigid support for the precise adjustment of the packaging pressure.

[0045] like Figures 2 to 9 and Figure 10As shown, the end of the positioning rod 142 close to the worm 121 is a wedge block 1421, the inclined surface of the wedge block 1421 faces the side of the worm 121, and the clamping piece 1211 is a conical structure.

[0046] The axial locking of worm 121 is achieved by the cooperation between the inclined surface of wedge block 1421 and the conical surface of clamping member 1211. When worm 121 moves along its axis, the outer conical surface of conical clamping member 1211 first contacts the inclined surface of wedge block 1421. As worm 121 advances, the conical surface of clamping member 1211 slides along the inclined surface of wedge block 1421, generating a radial force component that pushes wedge block 1421 radially toward the inner wall of positioning hole 141. When the worm 121 moves to the set position, the conical surface of the clamping member 1211 is completely fitted with the inclined surface of the wedge block 1421. At this time, the plane of the wedge block 1421 is tightly abutted with the corresponding plane of the clamping member 1211 to form a rigid support surface. At the same time, the preload force of the elastic member 1211 axially clamps the clamping member 1211 through the positioning rod 142, thereby firmly locking the worm 121 in the positioning hole 141, ensuring that the mounting frame 112 and the driving member 1221 are stable and motionless, and the driving member 1221 and the connector 13 maintain a reliable contact state.

[0047] like Figures 2 to 9 and Figure 10 As shown: a slider 1212 that can slide along the axial direction of the worm 121 is provided next to the clamping member 1211, and the slider 1212 is elastically connected to the worm 121. The slider 1212 is a conical block that is mirror-symmetrical to the conical structure of the clamping member 1211, and a gap is left between the slider 1212 and the clamping member 1211.

[0048] When the worm 121 is first inserted into the positioning hole 141, the conical surface of the clamping member 1211 first contacts the wedge-shaped positioning rod 142 on the side wall of the positioning hole 141, pushing the wedge-shaped positioning rod 142 to slide radially and complete the initial positioning. At this time, the slider 1212 does not participate in the positioning process due to the initial gap between it and the clamping member 1211, ensuring that the positioning rod 142 can limit the position of the clamping member 1211 without hindrance. Considering that the package body 1 needs to be disassembled for maintenance, a structure is provided to release the positioning of the worm 121 from the positioning assembly 14.

[0049] First, the worm 121 is rotated in the opposite direction to rotate the worm wheel 122, and the rotation of the worm wheel 122 drives the gear 12212 to rotate, so that the gear 12212 can reversely drive the rack 132 to retract, so that the rack 132 drives the two packaging bodies 1 to separate. In order to facilitate the subsequent use of the adjustment component 12, it is necessary to unlock the position of the worm 121, and continue to press the worm 121 with an external tool to move it deeper into the positioning hole 141. The worm 121 will drive the slider 1212 to move into the positioning hole 141 until the conical surface of the slider 1212 contacts the wedge block 1421 of the positioning rod 142. Since the conical surface of the slider 1212 is mirror-symmetrical with the conical structure of the clamping member 1211, the conical surface of the slider 1212 will push the wedge block 1421 to retract along the radial direction of the positioning hole 141, and because the mounting bracket 112 is elastically connected to the mounting cavity 111, the mounting bracket 112 will drive the mounting bracket 112 to move toward the adjustment hole 123 under the action of the elastic member resetting, and the mounting bracket 112 drives the movement of the worm 121. When the worm 121 exits the positioning hole 141, the slider 1212 will slide toward the clamping member 1211 under the action of the wedge block 1421 until the slider 1212 abuts against the clamping member 1211. The tapered surface of the slider 1212 of the worm 121 guides the wedge block 1421 to slide along its surface. Due to the close contact between the slider 1212 and the clamping member 1211, the wedge block 1421 can slide from the tapered surface of the slider 1212 to the tapered surface of the clamping member 1211, thereby releasing the lock of the clamping member 1211. In order to ensure that there is always a gap between the slider 1212 and the clamping member 1211, an elastic member can be provided on the slider 1212 so that after the slider 1212 is removed from the positioning hole 141, the slider 1212 can maintain a gap with the clamping member 1211 again, providing the initial condition for the next positioning. Throughout the entire process, the elastic connection of the slider 1212 ensures that a controllable gap is always maintained between it and the clamping member 1211, so that the slider 1212 and the clamping member 1211 can separate and reset the positioning rod 142 through the guidance of its tapered surface.

[0050] An elastic member is provided in the positioning hole 141 to assist the worm 121 in being removed when the limit is released, and to ensure that when the worm 121 is in the positioning hole 141 , the clamping member 1211 at the end of the worm 121 can better contact with the wedge block 1421 to ensure the limiting effect of the worm 121 .

[0051] like Figure 2 and Figure 3 As shown, the plug connector 13 is rotatably arranged on the package body 1 , and a relief groove 133 for accommodating the plug connector 13 is opened on the package body 1 .

[0052] When the package body 1 is initially plugged in, the connector 13 is in an initial vertical state and is stored in the avoidance groove 133. At this time, the extension direction of the connector 13 is perpendicular to the plug-in direction of the package body 1. In order to facilitate the storage of the connector 13, a magnetic block can be provided on the connector 13, and a magnetic portion can be provided in the avoidance groove 133 so that the connector 13 can be adsorbed, and the connector 13 is fixed in the avoidance groove 133 by magnetic force. When it is necessary to adjust the packaging pressure, the operator rotates the connector 13 around its rotation axis with the package body 1 to a horizontal state. This facilitates the plug-in and mating of the two package bodies 1 with the plug-in groove 11 through the connector 13. The above method makes it easy to store the connector 13, especially after multiple package bodies 1 are connected, the package body 1 at the edge of the battery stack can accommodate the connector 13 without taking up space, thus taking into account both structural compactness and operational flexibility.

[0053] There are multiple connectors 13 and multiple connector slots 11 , which can be evenly distributed along the circumference of the package body 1 . Each connector slot 11 is provided with a corresponding adjustment component 12 .

[0054] By evenly distributing multiple connectors 13, slots 11, and adjustment assemblies 12 along the circumference of the package 1, multi-point control of the packaging pressure between two adjacent packages 1 is achieved. The symmetrical layout eliminates local stress concentration, significantly improving the uniformity of force applied to seals, electrodes, and other components within the fuel cell stack, and extending the overall service life of the stack. Furthermore, the worm gears 122 of multiple adjustment assemblies 12 can be arranged on the same axis, allowing them to be driven synchronously, facilitating pressure adjustment between two adjacent packages 1. The number and spacing of these adjustment assemblies can be flexibly configured based on the size and pressure requirements of the packages 1, adapting to different fuel cell stack designs. This ensures uniform packaging pressure and avoids seal failure or performance degradation caused by single-point adjustment precision errors. Furthermore, the provision of multiple adjustment assemblies 12 creates a redundant configuration. Even if individual components fail, the remaining components can still maintain basic pressure regulation, improving system reliability and fault tolerance. The evenly distributed slots 11 and connectors 13 also enhance the mechanical connection stiffness between the packages 1, reducing relative displacement under vibration conditions and further optimizing the structural stability of the fuel cell stack.

[0055] like Figure 1 As shown, end plates 15 are provided at both ends of the length direction of the battery stack formed by stacking multiple packaging bodies 1, and a locking member 151 for pressing and fixing the entire battery stack is provided between the two end plates 15.

[0056] After multiple packaging bodies 1 are stacked, end plates 15 are set at both ends of the battery stack, and then the end plates 15 at both ends are connected by locking members 151. The locking members 151 can be set to use screws, which extend along the length of the battery stack. Through holes matching the screws are provided on the two end plates 15. By setting nuts that match the threads of the screws, the two end plates 15 are moved toward the center of the battery stack by tightening the nuts at both ends of the screws, and a uniform axial pre-tightening force is applied to the stacked packaging bodies 1; the locking members 151 can also use cable ties (not shown in the figure), which are wrapped around the periphery of the battery stack and tightened, and the end plates 15 and the packaging bodies 1 are fixed as a whole by the tension of the cable ties.

[0057] When adjusting the packaging pressure between two packaging bodies 1, the operator can use a feeler gauge to measure the gap between two adjacent packaging bodies 1 to determine whether the current packaging pressure meets the design requirements. The operator can then independently adjust the packaging pressure of the packaging body 1 through the adjustment component 12 until the feeler gauge measurement value meets the preset standard, ensuring that the seals and electrode assemblies between the packaging bodies 1 are evenly stressed.

[0058] like Figures 1 to 4 As shown, a detachable cover plate 1111 for maintaining the installation cavity 111 is provided below the plug-in slot 11 .

[0059] The setting of the cover 1111 provides an independent maintenance channel for the adjustment assembly 12 in the installation cavity 111, without the need to disassemble the entire fuel cell stack or adjacent packaging body 1, significantly reducing the maintenance difficulty and time cost, and is particularly suitable for high-reliability scenarios that require regular pressure calibration.

[0060] The detachable sealing connection not only ensures the sealing and dustproof and waterproof performance of the installation cavity 111 during normal operation, but also provides a convenient physical interface for component maintenance, avoiding the weakening of the structural strength due to maintenance needs.

[0061] The above embodiments merely represent one or more embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A hydrogen fuel cell stack protection structure with package pressure regulation function, comprising a plurality of packages for accommodating fuel cells, characterized in that: A plug-in connector and a plug-in slot are respectively provided on opposite sides of each package body, and two adjacent package bodies are plugged into and matched with the plug-in connector and the plug-in slot; An installation cavity is provided in the plug-in slot, and an adjustment component for adjusting the packaging pressure between two adjacent packaging bodies is provided in the installation cavity; The adjustment assembly includes a rotatable worm and a worm wheel meshing with the worm. A driving member connected to the worm wheel is provided next to the worm wheel, and the driving member is used to drive the plug-in component to perform linear displacement along its plug-in direction. An adjustment hole for operating the rotation of the worm is provided on the side of the package body adjacent to the plug-in component; The driving member is configured as a gear that rotates coaxially with the worm gear, and the plug-in member is configured as a rack that meshes with the gear, and the rack extends along the plug-in direction; A mounting frame that can move along the axial direction of the worm is provided in the mounting cavity, and the mounting frame is elastically connected to the mounting cavity. The worm, worm wheel and driving member are all provided on the mounting frame. A positioning assembly for locking the axial position of the worm is provided in the mounting cavity; The positioning assembly includes a positioning hole coaxially arranged with the worm, and the positioning hole is arranged on a side of the installation cavity opposite to the adjustment hole. A plurality of positioning rods are provided on the side wall of the positioning hole, which are elastically connected to the positioning hole and can slide radially along the positioning hole. A clamping member is provided on the end of the worm near the positioning hole. The end of the positioning rod close to the worm is a wedge-shaped block, the inclined surface of the wedge-shaped block faces the side of the worm, and the clamping piece is a conical structure; A slider that can slide along the axis of the worm is provided beside the clamping part. The slider is elastically connected to the worm. The slider is a conical block that is mirror-symmetrical to the conical structure of the clamping part, and a gap is left between the slider and the clamping part.

2. A hydrogen fuel cell stack protection structure with packaging pressure regulation function according to claim 1, characterized in that: The plug-in connector is rotatably arranged on the packaging body, and the packaging body is provided with an avoidance groove for accommodating the plug-in connector.

3. The hydrogen fuel cell stack protection structure with packaging pressure regulation function according to claim 1, characterized in that: There are multiple connectors and multiple sockets, which can be evenly distributed along the circumference of the package body. Each socket is provided with a corresponding adjustment component.

4. The hydrogen fuel cell stack protection structure with packaging pressure regulation function according to claim 1, characterized in that: End plates are provided at both ends of the battery stack formed by stacking multiple packaging bodies in the length direction, and a locking member for pressing and fixing the battery stack as a whole is provided between the two end plates.

5. The hydrogen fuel cell stack protection structure with packaging pressure regulation function according to claim 1, characterized in that: A detachable cover plate for maintaining the installation cavity is provided below the plug-in slot.

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