Positive plate of vanadium battery and vanadium battery

Abstract

The utility model relates to the field of vanadium batteries, in particular to a positive plate of a vanadium battery and the vanadium battery, which comprises a diaphragm, electrode materials are attached to two sides of the diaphragm, collector plates are attached to the side parts of the two electrode materials, and a positive plate and a negative plate are respectively attached to the side parts of the two collector plates. The self-locking component is used for increasing the fitting degree among the diaphragm, the electrode material, the collector plate, the positive plate and the negative plate; the connecting component I is used for increasing the contact area between the electrode material and the collector plate; the connecting component II is used for increasing the contact area between the collector plate and the positive plate as well as the negative plate; the utility model has the beneficial effects that the phenomenon of poor contact between the collector plate and an electrode material or between the collector plate and an electrode slice due to bolt looseness after long-time use is effectively prevented, the stability of charge and discharge of the vanadium battery is facilitated, and the discharge power of the vanadium battery can be well improved.

Description

Technical Field

[0001] The utility model relates to the field of vanadium batteries, in particular to a positive electrode sheet of a vanadium battery and a vanadium battery. Background Art

[0002] Vanadium battery, also known as vanadium redox flow battery (VRB), can also be called all-vanadium flow battery. It is a relatively advanced and widely commercialized redox flow battery based on the metal vanadium element. Liquid flow battery refers to a type of battery composed of a battery stack (including electrodes and ion exchange membranes), an electrolyte storage and supply unit, and a battery management control unit. The main difference from other batteries lies in the storage method of the electrolyte. During operation, the positive and negative electrolytes enter the positive and negative electrode units of the battery stack from the positive and negative electrolyte storage tanks through the circulation pump, and then return to the positive and negative electrolyte storage tanks through the pipeline to complete the cycle.

[0003] The current conventional vanadium battery structure (such as Figure 1 As shown), the electrode materials are usually symmetrically arranged on both sides of the diaphragm, and then current collecting plates are arranged on both sides of the electrode materials, and electrode sheets are arranged on both sides of the current collecting plates, and then the above structure is fixed by end plates and bolts. In practical applications, there are the following shortcomings: first, the fixing method is relatively simple. After long-term use, due to the loosening of the bolts, poor contact will occur between the current collecting plate and the electrode material or between the current collecting plate and the electrode sheet, resulting in unstable charging and discharging. Secondly, the contact area between the electrode sheet and the current collecting plate is insufficient, and there is a deficiency of low discharge power.

[0004] Therefore, it is necessary to invent a positive electrode sheet of a vanadium battery and a vanadium battery. Utility Model Content

[0005] To this end, the utility model provides a positive electrode sheet of a vanadium battery and a vanadium battery to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positive electrode sheet of a vanadium battery, comprising a diaphragm, electrode materials are bonded on both sides of the diaphragm, current collecting plates are bonded on the sides of the two electrode materials, and positive and negative electrode sheets are bonded on the sides of the two current collecting plates, respectively. It also includes a self-locking component for increasing the fit between the diaphragm, the electrode material, the current collecting plate, the positive electrode sheet and the negative electrode sheet, a connecting component 1 for increasing the contact area between the electrode material and the current collecting plate, and a connecting component 2 for increasing the contact area between the current collecting plate and the positive electrode sheet and the negative electrode sheet.

[0007] Preferably, the self-locking component includes through hole one, and the through hole one is opened at the four corners of the diaphragm, the four corners of the electrode material are each provided with through hole two, the four corners of the current collecting plate are each provided with through hole three, and the four corners of the positive electrode sheet and the four corners of the negative electrode sheet are each provided with through hole four.

[0008] Preferably, threaded rods are passed through the through hole one, through hole two, through hole three and through hole four, and the number of the threaded rods is four.

[0009] Preferably, the self-locking assembly also includes an extrusion ring 1, which is sleeved on the threaded rod, one end surface of the extrusion ring 1 abuts against the surfaces of the positive electrode sheet and the negative electrode sheet, and the other end surface of the extrusion ring 1 is fixed with a spring, and the end of the spring away from the extrusion ring 1 is fixed with an extrusion ring 2, and the extrusion ring 2 is sleeved on the threaded rod.

[0010] Preferably, both ends of the threaded rod are threadedly connected with fixing nuts, and the surface of one end of the extrusion ring 2 away from the spring is in contact with the fixing nuts.

[0011] Preferably, the connecting component 1 includes a plurality of grooves 1, and the plurality of grooves 1 are evenly arranged on the end surface of the electrode material away from the partition, and the end surface of the collecting plate facing the electrode material is evenly provided with a protrusion 1, and the protrusion 1 corresponds to the grooves 1 respectively, and the protrusion 1 is inserted into the corresponding groove 1, and the surface of the protrusion 1 fits with the inner wall of the groove 1.

[0012] Preferably, the second connecting component includes a plurality of second grooves, and the plurality of second grooves are evenly arranged on the surface of one end of the current collecting plate away from the electrode material. The surface of the end of the positive electrode sheet and the negative electrode sheet facing the current collecting plate are provided with a plurality of second protrusions, and the second protrusions correspond to the second grooves one by one respectively. The second protrusions are inserted into the corresponding second grooves, and the surface of the second protrusions fits the inner wall of the second groove.

[0013] A vanadium battery comprises the positive electrode sheet of the above-mentioned vanadium battery.

[0014] The beneficial effects of the utility model are as follows: through the coordinated use of the arranged diaphragm, electrode material, current collecting plate, positive electrode sheet, negative electrode sheet, self-locking component, connecting component one and connecting component two, under the action of the self-locking component, the fit between the diaphragm, electrode material, current collecting plate, positive electrode sheet and negative electrode sheet can be effectively improved, thereby effectively preventing the phenomenon of poor contact between the current collecting plate and the electrode material or between the current collecting plate and the electrode sheet due to loosening of the bolts after long-term use, which is beneficial to the stability of charging and discharging of the vanadium battery. Under the action of connecting component one and the connecting component, the contact area between the current collecting plate and the electrode material and the contact area between the current collecting plate and the positive and negative electrode sheets can be effectively increased, thereby greatly improving the discharge power of the vanadium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a conventional vanadium battery provided by the utility model;

[0016] Figure 2A schematic diagram of the structure provided by the utility model;

[0017] Figure 3 This is a structural stereogram of the positive electrode sheet provided by the utility model.

[0018] In the figure: 1. diaphragm; 2. electrode material; 3. current collecting plate; 4. positive electrode sheet; 5. negative electrode sheet; 6. threaded rod; 7. extrusion ring 1; 8. spring; 9. extrusion ring 2; 10. fixing nut; 11. through hole 1; 21. through hole 2; 22. groove 1; 31. through hole 3; 32. protrusion 1; 33. groove 2; 41. through hole 4; 42. protrusion 2. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0020] Please refer to the attached Figure 1-3 The utility model provides a positive electrode sheet of a vanadium battery, comprising a diaphragm 1, electrode materials 2 are laminated on both sides of the diaphragm 1, the electrode materials 2 can be graphite, glassy carbon, carbon fiber, graphite felt and carbon cloth, current collecting plates 3 are laminated on the sides of the two electrode materials 2, positive electrode sheets 4 and negative electrode sheets 5 are laminated on the sides of the two current collecting plates 3, respectively, for connecting a load / power supply, and also comprising a self-locking component for increasing the degree of lamination between the diaphragm 1, the electrode material 2, the current collecting plates 3, the positive electrode sheets 4 and the negative electrode sheets 5, a connecting component 1 for increasing the contact area between the electrode material 2 and the current collecting plates 3, and a connecting component 2 for increasing the contact area between the current collecting plates 3 and the positive electrode sheets 4 and the negative electrode sheets 5;

[0021] The self-locking component includes a through hole 11, which is provided at four corners of the diaphragm 1, through holes 21 are provided at four corners of the electrode material 2, through holes 3 31 are provided at four corners of the current collector 3, through holes 4 41 are provided at four corners of the positive electrode sheet 4 and four corners of the negative electrode sheet 5, and threaded rods 6 are passed through the through holes 1 11, 21, 31 and 41, and the number of threaded rods 6 is four, that is, the four threaded rods 6 pass through the positive electrode sheet 4, the negative electrode sheet 5, the two current collectors 3, the two electrode materials 2 and the four corners of the diaphragm 1 respectively by passing through the through holes 1 11, 21, 31 and 41;

[0022] The self-locking assembly also includes an extrusion ring 7, which is sleeved on the threaded rod 6, and one end surface of the extrusion ring 7 abuts against the surface of the positive electrode sheet 4 and the negative electrode sheet 5. A spring 8 is fixed to the other end surface of the extrusion ring 7, and an extrusion ring 2 9 is fixed to the end of the spring 8 away from the extrusion ring 7. The extrusion ring 2 9 is sleeved on the threaded rod 6, and both ends of the threaded rod 6 are threadedly connected with a fixing nut 10, and the end surface of the extrusion ring 2 9 away from the spring 8 abuts against the fixing nut 10. Specifically, when a technician in this field rotates the fixing nut 10 and controls the fixing nut 10 to move toward the positive and negative electrode sheets, the extrusion ring 2 9 will be pushed, even if The spring 8 undergoes elastic deformation and generates elastic force. Under the action of the elastic force, the positive and negative electrode sheets can be effectively squeezed through the squeezing ring 7, that is, the positive electrode sheet 4 and the negative electrode sheet 5 are effectively squeezed, so that the positive electrode sheet 4, the negative electrode sheet 5, the two current collecting plates 3, the two electrode materials 2 and the separator 1 are subjected to squeezing force. Under the action of the squeezing force, the fit between the diaphragm 1, the electrode material 2, the current collecting plate 3, the positive electrode sheet 4, and the negative electrode sheet 5 can be effectively improved, thereby effectively preventing the phenomenon of poor contact between the current collecting plate and the electrode material or between the current collecting plate and the electrode sheet due to loosening of the bolts after long-term use, which is beneficial to the stability of charging and discharging of the vanadium battery;

[0023] The connecting component 1 includes a plurality of grooves 22, and the plurality of grooves 22 are evenly arranged on the surface of one end of the electrode material 2 away from the separator 1. The surface of the end of the current collecting plate 3 facing the electrode material 2 is evenly provided with protrusions 32, and the protrusions 32 correspond to the grooves 22 one by one, and the protrusions 32 are inserted into the corresponding grooves 22, and the surface of the protrusions 32 is in contact with the inner wall of the grooves 22. Specifically, under the action of the plurality of protrusions 32 and the grooves 22, the contact area between the current collecting plate 3 and the electrode material 2 can be effectively increased;

[0024] The second connection component includes a plurality of second grooves 33, and the plurality of second grooves 33 are evenly arranged on the surface of one end of the current collecting plate 3 away from the electrode material 2. The surfaces of the positive electrode sheet 4 and the negative electrode sheet 5 facing the current collecting plate 3 are both provided with a plurality of second protrusions 42, and the second protrusions 42 correspond to the second grooves 33 one by one, and the second protrusions 42 are inserted into the corresponding second grooves 33, and the surface of the second protrusions 42 fits the inner wall of the second groove 33. Specifically, under the action of the plurality of second protrusions 42 and the second grooves 33, the contact area between the current collecting plate 3 and the positive electrode sheet 4 and the negative electrode sheet 5 can be effectively increased, thereby greatly improving the discharge power of the vanadium battery;

[0025] A vanadium battery comprises the positive electrode sheet of the above-mentioned vanadium battery.

[0026] The use process of the utility model is as follows: the technicians in this field first pass the four threaded rods 6 through the through hole 11, the through hole 21, the through hole 31 and the through hole 41, respectively through the positive electrode sheet 4, the negative electrode sheet 5, the two current collecting plates 3, the two electrode materials 2 and the four corners of the separator 1, and then install the fixing nut 8 on the threaded rod 6, and rotate the fixing nut 8, and control the fixing nut 10 to move toward the positive and negative electrode sheets, so that the fixing nut 8 pushes the extrusion ring 2 9, that is, the spring 8 is elastically deformed to generate elastic force. Under the action of the elastic force, the positive and negative electrode sheets can be effectively squeezed through the extrusion ring 1 7, that is, the positive electrode sheet 4 and the negative electrode sheet 5 are effectively squeezed, so that the positive electrode sheet 4, the negative electrode sheet 5, the two current collecting plates 3 , the two electrode materials 2 and the separator 1 are subjected to an extrusion pressure, and under the action of the extrusion pressure, the fit between the separator 1, the electrode material 2, the current collecting plate 3, the positive electrode sheet 4, and the negative electrode sheet 5 can be effectively improved, thereby effectively preventing the poor contact between the current collecting plate and the electrode material or between the current collecting plate and the electrode sheet due to loosening of the bolts after long-term use, which is beneficial to the stability of the charging and discharging of the vanadium battery; then, under the action of a plurality of protrusions 32 and a groove 22, the contact area between the current collecting plate 3 and the electrode material 2 can be effectively increased. At the same time, under the action of a plurality of protrusions 42 and a groove 33, the contact area between the current collecting plate 3 and the positive electrode sheet 4 and the negative electrode sheet 5 can be effectively increased, thereby greatly improving the discharge power of the vanadium battery.

[0027] The above is only a preferred embodiment of the utility model. Any person skilled in the art can modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A positive electrode sheet of a vanadium battery, comprising a diaphragm (1), electrode materials (2) being bonded to both sides of the diaphragm (1), current collecting plates (3) being bonded to the sides of the two electrode materials (2), and positive electrode sheets (4) and negative electrode sheets (5) being bonded to the sides of the two current collecting plates (3), respectively, wherein: It also includes a self-locking component for increasing the fit between the diaphragm (1), the electrode material (2), the current collecting plate (3), the positive electrode sheet (4) and the negative electrode sheet (5), a connecting component 1 for increasing the contact area between the electrode material (2) and the current collecting plate (3), and a connecting component 2 for increasing the contact area between the current collecting plate (3) and the positive electrode sheet (4) and the negative electrode sheet (5).

2. The positive electrode sheet of a vanadium battery according to claim 1, characterized in that: The self-locking component comprises a through hole one (11), wherein the through hole one (11) is provided at four corners of the diaphragm (1), the electrode material (2) is provided with a through hole two (21) at four corners, the current collecting plate (3) is provided with a through hole three (31) at four corners, and the positive electrode sheet (4) and the negative electrode sheet (5) are provided with a through hole four (41) at four corners.

3. The positive electrode sheet of a vanadium battery according to claim 2, characterized in that: The through hole one (11), the through hole two (21), the through hole three (31) and the through hole four (41) are all penetrated by threaded rods (6), and the number of the threaded rods (6) is four.

4. The positive electrode sheet of a vanadium battery according to claim 3, characterized in that: The self-locking assembly further comprises a first extrusion ring (7), which is sleeved on the threaded rod (6), one end surface of the first extrusion ring (7) abuts against the surface of the positive electrode sheet (4) and the negative electrode sheet (5), and a spring (8) is fixed to the other end surface of the first extrusion ring (7), and a second extrusion ring (9) is fixed to the end of the spring (8) away from the first extrusion ring (7), and the second extrusion ring (9) is sleeved on the threaded rod (6).

5. The positive electrode sheet of a vanadium battery according to claim 4, characterized in that: Both ends of the threaded rod (6) are threadedly connected with fixing nuts (10), and the end surface of the second extrusion ring (9) away from the spring (8) is in contact with the fixing nut (10).

6. The positive electrode sheet of a vanadium battery according to claim 1, characterized in that: The connecting component comprises a plurality of grooves (22), wherein the plurality of grooves (22) are evenly arranged on the surface of one end of the electrode material (2) away from the diaphragm (1), and the surface of the current collecting plate (3) facing the electrode material (2) is evenly provided with protrusions (32), wherein the protrusions (32) correspond to the grooves (22) one by one, respectively, and the protrusions (32) are inserted into the corresponding grooves (22), and the surface of the protrusions (32) is in contact with the inner wall of the grooves (22).

7. The positive electrode sheet of a vanadium battery according to claim 6, characterized in that: The second connecting component comprises a plurality of second grooves (33), wherein the plurality of second grooves (33) are evenly arranged on the surface of one end of the current collector (3) away from the electrode material (2), and the surfaces of the positive electrode sheet (4) and the negative electrode sheet (5) facing the current collector (3) are both provided with a plurality of second protrusions (42), wherein the second protrusions (42) correspond to the second grooves (33) respectively, and the second protrusions (42) are inserted into the corresponding second grooves (33), and the surfaces of the second protrusions (42) are in contact with the inner walls of the second grooves (33).

8. A vanadium battery, characterized in that: A positive electrode sheet of a vanadium battery comprising any one of claims 1 to 7.

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