Solid oxide fuel cell stack pressing device

Abstract

The utility model belongs to the technical field of fuel cells, and provides a solid oxide fuel cell stack pressing device, which comprises a fixed platform, a fixed seat is arranged on the fixed platform, a plurality of groups of pressing components are arranged on the fixed seat, each pressing component comprises a plurality of guide posts mounted on the fixed seat, and the guide posts are fixed on the fixed platform. A pressurizing plate is arranged on the guide columns in a sliding mode, a plurality of reset guide columns are arranged on the pressurizing plate, a pressure sensor is jointly arranged on the reset guide columns in a sliding mode, and a spring push plate is arranged below the pressure sensor. In the structure, the spring enables the pressurizing support rod to have continuous pressing force on the battery electric push, the spring can adapt to the change of the stress of the electric pile to realize real-time state adjustment, the requirements of a single electric pile and multiple electric piles are also met, and meanwhile, the pressing force of the pressurizing support rod on the battery electric pile is monitored in real time through the pressure sensor, so that the safety is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fuel cell technical field especially relates to a solid oxide fuel cell stack pressing device. BACKGROUND

[0002] As a kind of efficient, environmentally friendly energy conversion device, the performance of solid oxide fuel cell depends largely on the close contact between internal components of stack. The normal working condition of solid oxide fuel cell is in high temperature environment, from cold state to about 800 DEG C, and there is thermal attraction between cell sheet and structural components, if the stack cannot maintain its own gravitational balance, it will lead to stack seal failure, cell sheet rupture and further thermal safety failure risk. Therefore, the pressing device of the stack is crucial to maintain good contact between battery components, prevent gas leakage and improve the overall efficiency of the battery.

[0003] Traditional pressing device adopts rigid bolt fixed mode for pressing. Although it can achieve pressing, rigid pressing on one hand leads to local stress concentration of the stack, cannot be adjusted in real time with the temperature change state of the stack, especially in the condition of high-power stack, cold start of the stack and power load dynamic switching, the range of gravitational force changes greatly. Rigid bolt self-locking fixation can affect sealing and cell sheet contact, on the other hand, it is difficult to monitor the pressing force in real time, leading to overpressure or underpressure risk. Pure electric servo cylinder is high in cost, and the structure of device design is relatively complex in multi-stack system. UTILITARY MODEL CONTENT

[0004] In view of the above problems, the purpose of the utility model is to provide a solid oxide fuel cell stack pressing device, to solve the technical problems that the existing rigid self-locking stack pressing device cannot be adjusted in real time and monitor the pressing force.

[0005] The utility model adopts the following technical scheme:

[0006] The fuel cell stack pressing device includes a fixed platform, a fixed seat is provided on the fixed platform, a plurality of pressing assemblies are provided on the fixed seat, the pressing assembly includes a plurality of guide columns mounted on the fixed seat, a pressing plate is slidably provided on the guide column, a plurality of reset guide columns with reset upward baffles on the top are provided on the pressing plate, a sliding plate is commonly provided on the reset guide columns, a spring push plate is provided on the sliding plate through pressure sensor, a spring is provided between the pressing plate and spring push plate, the spring push plate downwardly provides a pressing support rod, the bottom of the pressing support rod penetrates through the fixed platform, the top of all guide columns commonly provides a top plate, and the top plate provides a pushing assembly for pushing the sliding plate to slide up and down.

[0007] Further, the slide plate is provided with a screw rod end bearing, the pushing assembly comprises a screw rod nut mounted on the top plate, the screw rod nut is penetrated by a screw rod, the top of the screw rod is provided with a rotating handle, and the bottom of the screw rod is rotationally installed on the screw rod end bearing.

[0008] Further, the spring pushing plate upwardly forms a limiting cavity, the pressing plate is provided with a limiting groove, and the upper and lower ends of the spring are located in the limiting cavity and the limiting groove respectively.

[0009] Further, the bottom of the pressing support rod is provided with a replaceable pressing head.

[0010] The beneficial effects of the utility model are as follows: when the device is used to press the battery stack, firstly, the battery stack is placed at the center position below the fixed platform, four pressing support rods are respectively aligned with the pressing areas of the stack, the stack is pressed by the pressing assembly, the pushing assembly pushes the slide plate, the reset guide column, the pressing plate and the pressing support rod as a whole to move downward along the guide column until the stack is contacted, the pushing assembly continues to push the slide plate to move downward, the slide plate slides downward on the reset guide column by a small distance, and the pressing support rod presses the stack downward.

[0011] From the above process, the structure has the following advantages:

[0012] 1. The device meets the requirements of single stack and multiple stacks, the adjusting stroke distance of the screw rod is long, and the device is suitable for stacks of different sizes under different powers.

[0013] 2. The spring enables the pressing support rod to continuously press the battery stack, and the spring can effectively solve the problems of discontinuity and real-time state adjustment of the screw rod adjustment.

[0014] 3. The pressure sensor is used for monitoring the pressing force of the pressing support rod on the battery stack in real time, and safety is ensured.

[0015] 4. The limiting groove can concentrate the pressure on the center of the stack, and the slide plate can be reset at the same time when the screw rod is reset, and the running stability is ensured.

[0016] 5. The pressing assembly has multiple groups, each group of the pressing assembly can be independently controlled, and the global pressure balance of the battery stack can be realized. DRAWINGS

[0017] Figure 1 It is a whole view of the solid oxide fuel cell stack pressing device.

[0018] Figure 2 It is a bottom view of the solid oxide fuel cell stack pressing device.

[0019] Figure 3It is the compression assembly schematic view of the utility model.

[0020] Figure 4 It is the compression assembly sectional view of the utility model. PREFERRED EMBODIMENT

[0021] In order to make the utility model patent purpose, technical scheme and advantage more clearly, the following is with the drawings and example, and the utility model is further detailed.The specific embodiments described here are only used to explain the utility model and not to limit the utility model.

[0022] In order to explain the technical scheme described in the utility model, the following is explained by specific embodiment.

[0023] For the convenience of illustration, only the parts related to the embodiment of the utility model are shown.

[0024] Combined Figures 1-4 As shown in the figure, the fuel cell stack compression device includes a fixed platform 1, the fixed platform 1 is equipped with a fixed seat 2, the fixed seat 2 is equipped with multiple compression assemblies, the compression assembly includes several guide columns 3 installed on the fixed seat 2, the guide column 3 is equipped with a pressing plate 4 slidingly, the pressing plate 4 is equipped with several reset guide columns 5 with reset upper stop plates 51 on the top, the reset guide columns 5 are equipped with a sliding plate 6 slidingly together, the sliding plate 6 is equipped with a spring push plate 7 through a pressure sensor 61, the spring 8 is arranged between the pressing plate 4 and the spring push plate 7, the spring push plate 7 is equipped with a pressing support 9 downward, the bottom of the pressing support 9 penetrates the fixed platform 1, all the guide columns 3 are equipped with a top plate 10 on the top, the top plate 10 is equipped with a pushing assembly for pushing the sliding plate 6 to slide up and down.

[0025] As a kind of high efficiency, environmental protection energy conversion device, the performance of solid oxide fuel cell depends largely on the close contact between internal components of stack. Therefore, the compression device of stack is crucial to maintain good contact between battery components, prevent gas leakage and improve the overall efficiency of battery.

[0026] In the illustration, the compression assembly has four groups, and the four compression assemblies are evenly arranged.Each compression assembly can be independently controlled, and the whole domain pressure balance of battery stack can be realized, and the compression effect is better.In addition, the guide column and the reset guide column in the illustration are four, and are distributed in rectangle shape.Of course, in the specific design structure, the state and specific number of guide column and reset guide column layout are not limited.For example, when the pressing plate is a circular plate, multiple guide columns and reset guide columns can also be circularly arranged.

[0027] In the initial state, the spring is compressed, and the slide plate is located at the top of the reset guide post 5 and limited by the reset rising baffle 51. When using this device to press the battery stack, first place the battery stack in the center position below the fixed platform, and align the four pressure support rods with the stack pressing area. Then, the pressing assembly presses the stack pressing area, that is, the pushing assembly pushes the slide plate, reset guide post, pressure plate, and pressure support rods as a whole along the guide post 3 until they contact the battery stack. The pushing assembly then continues to push the slide plate downwards, and the slide plate slides downwards a short distance on the reset guide post. During this process, the spring is further compressed until the pressure support rods press the battery stack.

[0028] During the process of pressing the battery stack with the pressure strut, the pressure force of the pressure strut on the battery stack can be monitored in real time by a pressure sensor. If the pressure force is insufficient or excessive, the pressure force of the pressure strut on the battery stack can be adjusted by the pushing component until the pressure value meets the requirements. This can avoid the risk of over-pressure or under-pressure on the battery stack by the pressure strut and improve the quality of pressing the battery stack.

[0029] During the actual clamping process, a replaceable pressure head 13 can be provided at the bottom of the pressure strut 9. The pressure head increases the contact area with the battery stack, further improving the quality of clamping the battery stack.

[0030] In a preferred configuration, the spring pusher plate 7 forms an upward-facing limiting cavity 11, and the pressure plate 4 has a limiting groove 12. The upper and lower ends of the spring 8 are located within the limiting cavity 11 and the limiting groove 12, respectively. In this configuration, the inner diameter of the limiting cavity is larger than the outer diameter of the spring, and the upper and lower ends of the spring are located within the limiting cavity and the limiting groove, respectively. The limiting cavity and the limiting groove effectively limit the spring, maintaining pressure concentrated at the center of the battery stack and preventing lateral displacement of the spring during the pressing of the battery stack.

[0031] Furthermore, as a preferred structure, such as Figure 1 , Figure 3 The slide plate 6 is provided with a lead screw end bearing 131 above it. The pushing assembly includes a lead screw nut 14 installed on the top plate 10. A lead screw 15 is inserted into the lead screw nut 14. A rotating handle 16 is provided at the top of the lead screw 15. The bottom of the lead screw 15 is rotatably mounted on the lead screw end bearing 131.

[0032] When the pusher assembly is used to press down the slide plate, the staff turns the rotating handle to rotate the screw rod, the screw rod moves downward in the screw rod nut during the rotation, the screw rod pushes the slide plate during the downward movement, and then transmits the pressure to the battery stack through the pressure supporting rod, and also monitors the pressing force in real time through the pressure sensor to ensure that the pressure value reaches the set range. If the pressure is insufficient or too large, the rotating handle can be further rotated to fine-tune the position of the screw rod until the pressure value meets the requirements.

[0033] In addition, when the device is used to press the stack, the temperature of the stack will change, especially when the stack is restarted under the condition of high-power stack and the power load is dynamically switched, the range of gravity change is large, and then the small change of the volume of the stack may be caused. In this process, the spring can ensure that the pressing head always maintains appropriate pressing force on the stack due to its elasticity and adaptability, and prevents the pressing head from damaging the stack due to excessive pressing due to its buffering effect.

[0034] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A solid oxide fuel cell stack clamping device, characterized in that: The fuel cell stack clamping device includes a fixed platform with a fixed base on the fixed platform. Multiple clamping assemblies are mounted on the fixed base. Each clamping assembly includes several guide posts mounted on the fixed base. A pressure plate slides on the guide posts. Several reset guide posts with reset rising baffles at the top are mounted on the pressure plate. A sliding plate is mounted on the reset guide posts. A spring push plate is mounted on the sliding plate via a pressure sensor. A spring is located between the pressure plate and the spring push plate. A pressure support rod is positioned downwards on the spring push plate, with its bottom extending through the fixed platform. A top plate is mounted on the top of all the guide posts. A pushing assembly is mounted on the top plate to push the sliding plate up and down.

2. The solid oxide fuel cell stack clamping device as described in claim 1, characterized in that: The slide plate is provided with a lead screw end bearing. The push assembly includes a lead screw nut installed on the top plate. A lead screw is inserted into the lead screw nut. A rotating handle is provided at the top of the lead screw. The bottom of the lead screw is rotatably mounted on the lead screw end bearing.

3. The solid oxide fuel cell stack clamping device as described in claim 2, characterized in that: The spring push plate forms a limiting cavity facing upwards, and a limiting groove is opened on the pressure plate. The upper and lower ends of the spring are located in the limiting cavity and the limiting groove, respectively.

4. The solid oxide fuel cell stack clamping device as described in claim 3, characterized in that: The bottom of the pressure strut is equipped with a replaceable pressure head.

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