Electric pile end cover plate

Abstract

The utility model relates to the technical field of chemical batteries, in particular to an electric pile end cover plate which mainly comprises two symmetrical cover plate devices, and an electric pile is arranged between the two cover plate devices. The cover plate device comprises supporting flat plates and sealing devices arranged on the supporting flat plates, a plurality of through holes are formed in the supporting flat plates, the two supporting flat plates are fixedly connected through bolts, and the galvanic pile is pressed between the two supporting flat plates; a liquid inlet hole and a liquid outlet hole are formed in one side of the supporting flat plate. According to the structure, the sealing device is additionally arranged between the supporting flat plate and the electric pile, the sealing effect can be enhanced to a certain extent by the sealing device, and the electrolyte is prevented from flowing out of the battery pack, so that the electrolyte is prevented from flowing out of a gap between the electric pile and the supporting flat plate.

Description

Technical Field

[0001] This utility model relates to the field of chemical battery technology, and more specifically, to a battery stack end cover. Background Technology

[0002] A vanadium redox flow battery is a redox battery that uses vanadium as the active material in a circulating liquid state. The electrical energy of the vanadium battery is stored as chemical energy in a sulfuric acid electrolyte containing vanadium ions of different valence states. An external pump forces the electrolyte into the battery stack, where it circulates within different storage tanks and half-cells under mechanical force. A proton exchange membrane serves as the separator in the battery pack. The electrolyte solution flows parallel across the electrode surfaces and undergoes electrochemical reactions. Current is collected and conducted through dual electrode plates, thus converting the chemical energy stored in the solution into electrical energy.

[0003] In the existing technology, the cover plate and the fuel cell stack are fixed together by pressure, and the cover plate and the fuel cell stack are in close contact through pressure. However, after a certain period of use, some gaps will still appear between the cover plate and the fuel cell stack, and the sealing effect is not good. Utility Model Content

[0004] The purpose of this invention is to provide an end cover plate for fuel cell stacks to solve the problem of poor sealing performance in the prior art.

[0005] This utility model is achieved through the following technical solution:

[0006] An end cover for an electric fuel cell stack includes two symmetrical cover devices, with the electric fuel cell stack positioned between the two cover devices.

[0007] The cover plate device includes a support plate and a sealing device disposed on the support plate. The support plate has several through holes. Two support plates are fixedly connected by bolts to press the fuel cell stack between the two support plates.

[0008] One side of the support plate has an inlet and an outlet, which are connected to the inlet and outlet of the fuel cell stack, respectively, for the electrolyte to flow into and out of the fuel cell stack. A conductive module is provided on the top of the support plate. One end of the conductive module is connected to the output end of the fuel cell stack, and the other end is connected to the output cable. The conductive module is used to guide the current generated by the fuel cell stack to the output cable.

[0009] Preferably, the sealing device includes an iron plate disposed on the surface of the supporting plate and a plurality of sealant units. Each sealant unit includes a sealant block and a magnetic attraction device. The magnetic attraction device is disposed at the bottom of the sealant block, and the sealant block is attracted to the surface of the iron plate by the magnetic attraction device.

[0010] Preferably, the conductive module includes a support frame and a conductive head disposed within the support frame. One end of the conductive head is used to connect to the output end of the fuel cell stack, and the other end is used to connect to the output cable. The conductive head is fixedly connected within the support frame.

[0011] Preferably, a plurality of insulating blocks are further provided between the conductive head and the support frame.

[0012] Preferably, a current detection sensor is also provided, which is disposed on the support frame and connected to the conductive head, and is used to detect the output current of the fuel cell stack at this time.

[0013] Preferably, a display is also provided outside the support frame, and the display is connected to the current detection sensor to display the value detected by the current detection sensor.

[0014] Preferably, the number of through holes in the width direction of the support plate is less than the number of through holes in the length direction of the support plate.

[0015] Preferably, the two ends of the bolt are detachably connected by nuts.

[0016] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0017] The solution provided by this utility model mainly includes two symmetrical cover plate devices, with the battery stack positioned between them. Each cover plate device includes a supporting plate and a sealing device mounted on it. The supporting plate has several through holes, and the two supporting plates are fixedly connected by bolts, pressing the battery stack between them. One side of each supporting plate has an inlet and an outlet for electrolyte. This structure adds a sealing device between the supporting plate and the battery stack, which enhances the sealing effect to a certain extent, preventing electrolyte from flowing out of the battery pack and causing it to leak from the gap between the battery stack and the supporting plate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 For the present utility model Figure 1 The left view;

[0021] Figure 3 This is a schematic diagram of the sealant unit of this utility model;

[0022] Icons: 1- Bolt, 2- Support frame, 3- Conductive head, 4- Charge stack, 5- Sealing block, 6- Support plate, 7- Magnetic suction device, 8- Iron plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Please refer to Figures 1-3 The present invention provides an end cover plate for an electric stack, comprising two symmetrical cover plate devices, wherein the electric stack 4 is disposed between the two cover plate devices;

[0025] The cover plate device includes a support plate 6 and a sealing device disposed on the support plate 6. The support plate 6 has several through holes. Two support plates 6 are fixedly connected by bolts 1 to press the fuel cell stack 4 between the two support plates 6.

[0026] The number of through holes in the width direction of the support plate 6 is less than the number of through holes in the length direction of the support plate 6, and the two ends of the bolt 1 are detachably connected by nuts.

[0027] During use, bolt 1 passes through the through holes of both support plates 6 and through the through holes inside the fuel cell stack 4. Nuts are then installed at both ends of bolt 1 to continuously apply pressure, bringing the support plates 6 and the fuel cell stack 4 into tight contact and completing the fixation. In addition, the support plates 6 can be made of insulating material to prevent leakage and accidental contact by personnel.

[0028] The sealing device is located on the side of the support plate 6 adjacent to the fuel cell stack 4 to enhance the sealing effect of the entire device.

[0029] One side of the support plate 6 is provided with an inlet hole and an outlet hole, which are respectively connected to the inlet hole and outlet hole of the fuel cell stack 4 for the electrolyte to flow into and out of the fuel cell stack 4. A conductive module is provided on the top of the support plate 6. One end of the conductive module is connected to the output end of the fuel cell stack 4, and the other end is connected to the output cable. The conductive module is used to guide the current generated by the fuel cell stack 4 to the output cable.

[0030] The solution provided by this utility model mainly includes two symmetrical cover plate devices, with the battery stack 4 positioned between them. Each cover plate device includes a supporting plate 6 and a sealing device mounted on the supporting plate 6. The supporting plate 6 has several through holes, and the two supporting plates 6 are fixedly connected by bolts 1, pressing the battery stack 4 between them. One side of the supporting plate 6 has an inlet and an outlet for electrolyte. Through this structure, a sealing device is added between the supporting plate 6 and the battery stack 4. This sealing device can enhance the sealing effect to a certain extent, preventing electrolyte from flowing out of the battery pack and causing electrolyte to leak from the gap between the battery stack 4 and the supporting plate 6.

[0031] In one exemplary embodiment of this utility model, the sealing device includes an iron plate 8 disposed on the surface of the supporting plate 6 and a plurality of sealing adhesive units. Each sealing adhesive unit includes a sealing adhesive block 5 and a magnetic attraction device 7. The magnetic attraction device 7 is disposed at the bottom of the sealing adhesive block 5, and the sealing adhesive block 5 is attracted to the surface of the iron plate 8 by the magnetic attraction device 7.

[0032] In this embodiment, several small-volume sealing blocks 5 are used to form a complete sealing strip. The purpose of this design is to allow the cover plate of this solution to be applied to more sizes of fuel cell stacks 4. Different sizes of fuel cell stacks 4 require sealing strips of different lengths. Therefore, through the structure of this solution, sealing blocks 5 in different positions can be freely combined to form the final sealing strip. In addition, a plastic film can be set on the outer surface of the iron plate 8 to prevent corrosion from leaked electrolyte.

[0033] In one exemplary embodiment of this utility model, the conductive module includes a support frame 2 and a conductive head 3 disposed within the support frame 2. One end of the conductive head 3 is used to connect to the output end of the fuel cell stack 4, and the other end is used to connect to the output cable. The conductive head 3 is fixedly connected within the support frame 2. Furthermore, a plurality of insulating blocks are disposed between the conductive head 3 and the support frame 2.

[0034] In one exemplary embodiment of this utility model, a current detection sensor is also provided. The current detection sensor is disposed on the support frame 2 and connected to the conductive head 3, and is used to detect the output current of the fuel cell stack 4 at this time. A display is also disposed outside the support frame 2, and the display is connected to the current detection sensor to display the value detected by the current detection sensor.

[0035] The above structure allows for a more intuitive view of the current power generation data of fuel cell stack 4.

[0036] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stack end plate, characterized in that, Two symmetrical cover plate devices are included for setting a stack (4) between the two cover plate devices; The cover plate device includes a support flat plate (6) and a sealing device arranged on the support flat plate (6), a plurality of through holes are arranged on the support flat plate (6), and the two support flat plates (6) are fixedly connected through bolts (1) to press the stack (4) between the two support flat plates (6); A liquid inlet hole and a liquid outlet hole are arranged on one side of the support flat plate (6), the liquid inlet hole and the liquid outlet hole are respectively communicated with the liquid inlet hole and the liquid outlet hole of the stack (4), and the electrolyte flows into and out of the stack (4), and a conductive module is arranged on the top of the support flat plate (6), one end of the conductive module is connected with the output end of the stack (4), and the other end is connected with an output cable, and the conductive module is used for guiding the current generated by the stack (4) to the output cable.

2. A stack end plate according to claim 1, wherein The sealing device includes an iron plate (8) arranged on the surface of the support flat plate (6) and a plurality of sealing glue units, the sealing glue unit includes a sealing glue block (5) and a magnetic attraction device (7), the magnetic attraction device (7) is arranged at the bottom of the sealing glue block (5), and the sealing glue block (5) is adsorbed on the surface of the iron plate (8) through the magnetic attraction device (7).

3. A stack end plate according to claim 1, wherein The conductive module includes a support frame (2) and a conductive head (3) arranged in the support frame (2), one end of the conductive head (3) is used for connecting with the output end of the stack (4), and the other end is used for connecting with the output cable, and the conductive head (3) is fixedly connected in the support frame (2).

4. A stack end plate according to claim 3, wherein A plurality of insulating blocks are further arranged between the conductive head (3) and the support frame (2).

5. A stack end plate according to claim 3, wherein A current detection sensor is further arranged, the current detection sensor is arranged on the support frame (2) and connected with the conductive head (3), and is used for detecting the output current of the stack (4) at this time.

6. A stack end plate according to claim 5, wherein A display is further arranged outside the support frame (2), the display is connected with the current detection sensor, and is used for displaying the value detected by the current detection sensor.

7. A stack end plate according to claim 1, wherein The number of through holes arranged in the width direction of the support flat plate (6) is less than the number of through holes arranged in the length direction of the support flat plate (6).

8. A stack end plate according to claim 1, wherein The two ends of the bolt (1) are detachably connected through nuts.

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