CN213936253U

CN213936253U - Bionic uniform-flow liquid flow battery panel frame

Info

Publication number: CN213936253U
Application number: CN202023212572.6U
Authority: CN
Inventors: 李昂; 李晓蒙; 杨林; 王含
Original assignee: Beijing Herui Energy Storage Technology Co ltd
Current assignee: Beijing Herui Energy Storage Technology Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-08-10
Anticipated expiration: 2030-12-28

Abstract

The utility model discloses a bionical even flow battery sheet frame, including positive plate frame and negative plate frame, the surface structure of negative plate frame is the mirror image with positive plate frame each other, the sheet frame is the flat structure of rectangle, minor face design electrolyte entry and export at the rectangle sheet frame, utilize the long limit region design runner of rectangle as far as possible, increase the occupation rate adoption of electrode cavity in the sheet frame, the sheet frame adopts the even flow of two-stage, the even flow L type mainstream canal design of first order, the total flow way widens gradually after turning round, the velocity of flow of electrolyte reduces gradually, the second level is the even flow district of bionical fish scale, the fish scale in the even flow district of bionical fish scale, mix electrolyte gradually and flow equalize, finally reach the synchronous long limit's of electrode that gets into of electrolyte.

Description

Bionic uniform-flow liquid flow battery panel frame

Technical Field

The utility model belongs to the technical field of the redox flow battery energy storage, in particular to bionical even flow cell plate frame.

Background

The method is applied to the direction of the flow battery in the field of energy storage. The mainstream products in the domestic market are all-vanadium, zinc-iron and iron-chromium flow batteries, have wide application space in scenes of wind, light, water, energy storage and the like, and are a new technical industry for improving the utilization efficiency of new energy in the future.

The flow battery stacks are similar in structure, and parts such as plate frames, electrodes, bipolar plates, current collecting plates, end plates and membranes exist. The flow channel on the surface of the plate frame leads electrolyte into the electrodes in the electric pile to generate electrochemical reaction, and the charge and discharge performance of the battery is directly or indirectly influenced from different layers due to factors such as uniformity of the electrolyte entering the electrodes.

The plate frame in the prior art has the following problems:

1. the traditional plate frame flow channel adopts a winding flow channel, a lug boss, a reducing flow channel and other modes to uniformly guide electrolyte into an electrode, but the characteristics of the flow channel can cause larger fluid resistance.

2. The electrode cavity is an electrochemical reaction site, and the reaction area determines the power of the cell stack. The space that some current sheet frame runners occupy is too big, leads to the electrode chamber volume less, and the space utilization of sheet frame is lower.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the utility model provides a bionical even flow battery sheet frame adopts bionical fish scale characteristic to carry out even flow, is a succinct and easy processing's scheme, can be at effectual reduction flow resistance, also provides new notion and direction for flow battery's flow field design.

The utility model provides a bionical even flow battery sheet frame, includes positive plate frame and negative plate frame, and the sheet frame of positive plate frame is the flat structure of rectangle, and the mid portion fretwork is provided with for the electrode chamber on the sheet frame: the positive electrolyte inlet, the positive electrolyte outlet, the negative electrolyte inlet and the negative electrolyte outlet are arranged on the short side of the plate frame, and the positions of the positive electrolyte inlet, the positive electrolyte outlet, the negative electrolyte inlet and the negative electrolyte outlet are distributed in a diagonal manner; the bionic fish scale uniform flow area is arranged on the left side of the shunting table, and the bionic fish scale steps are arranged in the bionic fish scale uniform flow area and distributed in a diagonal manner; the positioning notches are arranged on one side of the bionic scale homogenizing zone and distributed in a diagonal line manner; the liquid flow hole sealing groove is arranged at the periphery of the cathode electrolyte inlet and the cathode electrolyte outlet; the semi-surrounding sealing groove is arranged at the periphery of the L-shaped main runner; the surface structure of the negative plate frame and the positive plate frame are mirror images.

Furthermore, two corners of positive plate frame and negative plate frame all are provided with location portion, are diagonal distribution, and the location portion of positive plate frame is the through-hole, and the location portion of negative plate frame is the cylinder.

Further, a steady flow platform is arranged between the electrode cavity and the bionic scale homogenizing zone, and the height difference exists between the steady flow platform and the bionic scale homogenizing zone. .

Furthermore, the outer contour of the blocking table is Y-shaped, the upper end of the blocking table is linear, the two side surfaces of the blocking table are inclined planes and are connected with the lower end of the blocking table to be protruded, and corners of the outer contour are in arc transition.

Furthermore, a straight line sealing groove is formed in the middle of the straight line section of the blocking table.

Further, the fish scale imitating steps can be single-layer or multi-layer.

The utility model has the advantages that: an electrolyte inlet and an electrolyte outlet are designed on the short side of a rectangular plate frame, a flow channel is designed by utilizing the long side area of the rectangle as much as possible, the occupancy of an electrode cavity in the plate frame is increased, the plate frame adopts two-stage uniform flow, the first-stage uniform flow L-shaped main flow channel is designed, the total flow channel is gradually widened after turning, the flow speed of the electrolyte is gradually reduced, the second stage is a bionic scale uniform flow area, scales in the bionic scale uniform flow area are gradually mixed and flow-equalized, and finally the purpose that the electrolyte synchronously enters the long side of the electrode is achieved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a positive plate frame of a bionic uniform flow battery plate frame according to an embodiment of the present invention;

fig. 2 is a partial schematic view of a bionic scale homogenizing zone of an anode plate frame of a bionic homogenizing flow battery plate frame in an embodiment of the present invention;

fig. 3 is a schematic structural view of a negative plate frame of a bionic uniform flow battery plate frame according to an embodiment of the present invention;

in the figure: the bionic fish scale flow balancing device comprises a plate frame 1, a plate frame 21, a positive electrolyte inflow port 22, a positive electrolyte outflow port 23, a negative electrolyte inlet 24, a negative electrolyte outlet 24, a 3-L-shaped main flow channel, a 4-blocking table, a 5-bionic fish scale flow balancing area, a 6-positioning notch, a 7-positioning portion, an 8-liquid flow hole sealing groove, a 9-semi-surrounding sealing groove, a 10-linear sealing groove, a 11-shunting table, a 12-fish scale simulating step and a 13-flow stabilizing platform.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1 and fig. 3, fig. 1 is a schematic diagram of an anode plate frame structure of a bionic uniform flow battery plate frame according to an embodiment of the present invention, fig. 3 is a schematic diagram of a cathode plate frame structure of a bionic uniform flow battery plate frame according to an embodiment of the present invention, a bionic uniform flow battery plate frame includes an anode plate frame and a cathode plate frame, and a surface structure of the cathode plate frame and the anode plate frame are mirror images.

Preferably, for the convenience of piling up, all be provided with location portion 7 on positive plate frame and the negative plate frame, the difference lies in: the positive electrode plate frame positioning portion 7 is a through hole, and the negative electrode plate frame positioning portion 7 is a cylindrical body. 2 location portion 7 sets up at two corners of sheet frame 1, is diagonal distribution.

The following description will specifically take a positive electrode plate frame as an example. As shown in fig. 1, a plate frame 1 of the positive plate frame is a rectangular flat plate structure, a middle part of a main body of the plate frame 1 is hollowed to form an electrode cavity, and the electrode cavity with the hollowed center is provided with an electrode material made of a porous material, which is an electrochemical reaction site. The positive electrolyte inflow port 21, the positive electrolyte outflow port 22, the negative electrolyte inlet 23 and the negative electrolyte outlet 24 are all arranged on the short side of the plate frame 1, and the long side area of the rectangle is utilized as much as possible to design a flow channel, so that the occupancy of an electrode cavity in the plate frame 1 is increased, and the compact design is met.

The positions of the positive electrolyte inlet 21 and the positive electrolyte outlet 22, and the positions of the negative electrolyte inlet 23 and the negative electrolyte outlet 24 are diagonally distributed. And liquid flow hole sealing grooves 8 are formed in the peripheries of the anode electrolyte inlet 23 and the cathode electrolyte outlet 24 and are matched with sealing gaskets to form sealing, so that the anode electrolyte and the cathode electrolyte are prevented from being mixed.

The positive electrolyte flows into the L-shaped main flow passage 3 through the positive electrolyte inflow port 21 at the upper right of the electrode chamber. The L-shaped main runner 3 is a first-stage uniform flow, a plurality of blocking tables 4 are arranged at the second ends of the L-shaped main runner 3, the outer contours of the blocking tables 4 are Y-shaped, the upper ends of the blocking tables are linear, the two sides of the blocking tables are inclined planes and are connected with the lower end of the blocking tables to be convex, and the corners of the outer contours are in arc transition. The function of the baffle table 4 is to divide the incoming electrolyte evenly into several partial flows. The width of the main flow channel 3 gradually increases from narrow to wide, the flow velocity of the electrolyte is gradually reduced, but the gradually increased cross-sectional area ensures that the flow of the shunts flowing through the plurality of blocking tables 4 is the same. The middle part of the straight line section of each blocking platform 4 is provided with a linear sealing groove 10 which is matched with a sealing gasket to form sealing, so that the purpose of preventing electrolyte from directly turning over the blocking platform from the gap between the compacted plate frames and entering an electrode cavity is realized.

The periphery of L shape sprue 3 is provided with half and surrounds seal groove 9, forms sealedly with sealed the pad cooperation, prevents that electrolyte from not flowing according to the trend of design.

Gaps between adjacent blocking platforms 4 and between the blocking platforms 4 and the edge of the main flow channel 3 form Y-shaped flow distribution platforms 11, electrolyte is distributed by the blocking platforms 4 through the main flow channel 3, enters the flow distribution platforms 11, and enters second-stage uniform flow, namely the bionic fish scale uniform flow area 5, through each narrow flow distribution platform 11.

Please refer to fig. 2, fig. 2 is a local schematic diagram of a bionic scale homogenizing zone of an anode plate frame of a bionic uniform flow battery plate frame according to an embodiment of the present invention, the bionic scale homogenizing zone 5 is provided with a plurality of fish scale steps 12, the appearance of the fish scale steps 12 is not limited to the semi-circular appearance shown in the figure, and may be other characteristic structures, but it can be ensured that the electrolyte of the adjacent shunting table 11 is mixed at this point, and reaches relatively uniform flow and flow velocity when entering the long edge of the electrode cavity. The bionic scale steps 12 in the area of the bionic scale homogenizing area 5 can be single-layer or multi-layer, height difference exists between every two layers in the multi-layer arrangement, and the scale density is freely adjusted.

One side of the bionic scale homogenizing area (5) is provided with a positioning gap 6 which is distributed in a diagonal line. The bipolar plate or the membrane can be compounded with the plate frame by adopting the modes of hot pressing, laser welding and the like. When the bipolar plate and the membrane are connected with the plate frame into a whole by gluing or laser welding and the like, the positioning notch 6 is used for filling glue or welding, and the positioning notch 6 is outside the electrode area to prevent the glue and the welding from causing adverse effects on the performance of electrochemical reaction and a battery unit. When the welding mode is not adopted, the positioning notch 6 plays a positioning role in stacking.

The steady flow platform 13 is a rectangular platform and is arranged between the bionic scale even flow area 5 and the electrode cavity, and has a height difference with the bionic scale even flow area 5 so as to further stabilize the flow before the electrolyte enters the long edge of the electrode.

The L-shaped main runner 3, the blocking table 4, the bionic scale even flow area 5, the semi-surrounding sealing groove 9, the linear sealing groove 10, the flow dividing table 11, the fish scale simulating steps 12 and the flow stabilizing platform 13 are distributed on the left side and the right side of the electrode cavity in a mirror image mode.

The positive electrolyte enters the electrode cavity for reaction through the current stabilizing platform 13 on the right side of the electrode cavity, and the reacted electrolyte sequentially passes through the current stabilizing platform 13 on the left side of the electrode cavity, the fish scale simulating step 12, the flow dividing table 11, the blocking table 4 and the L-shaped main flow channel 3 and finally flows into the positive electrolyte outlet 22. The shapes and the connection relations of the steady flow platform 13 at the left side of the electrode cavity, the fish scale simulating step 12, the flow dividing table 11, the blocking table 4 and the L-shaped main flow channel 3 are not described in detail.

The surface structure of the negative plate frame and the positive plate frame are mirror images. The negative electrolyte of the negative plate frame flows in from a negative electrolyte inlet 23, flows into the electrode cavity through the L-shaped main runner 3, the blocking platform 4, the flow distribution platform 11, the fish scale simulating steps 12 and the flow stabilizing platform 13 on the left side of the electrode cavity to react, and finally flows out from a negative electrolyte outlet 24 after the negative electrolyte after the reaction sequentially passes through the flow stabilizing platform 13, the fish scale simulating steps 12, the flow distribution platform 11, the blocking platform 4 and the L-shaped main runner 3 on the right side of the electrode cavity.

Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a bionical even flow battery sheet frame, its characterized in that, includes positive plate frame and negative plate frame, sheet frame (1) of positive plate frame is the flat structure of rectangle, and the mid portion fretwork is the electrode chamber be provided with on sheet frame (1):

a positive electrolyte inlet (21), a positive electrolyte outlet (22), a negative electrolyte inlet (23) and a negative electrolyte outlet (24) are arranged on the short side of the plate frame (1), and the positions of the positive electrolyte inlet (21), the positive electrolyte outlet (22), the negative electrolyte inlet (23) and the negative electrolyte outlet (24) are distributed in a diagonal manner;

the bionic fish scale uniform flow area comprises an L-shaped main flow channel (3), blocking platforms (4), a bionic fish scale uniform flow area (5), a semi-enclosed sealing groove (9), a flow dividing platform (11) and fish scale simulating steps (12), wherein the L-shaped main flow channel (3) on the right side of an electrode cavity is distributed on the left side and the right side of the electrode cavity in a mirror image manner, the first end of the L-shaped main flow channel (3) on the right side of the electrode cavity is communicated with a positive electrolyte inflow port (21), the blocking platforms (4) are arranged at the second end of the L-shaped main flow channel (3), the flow dividing platform (11) is formed between adjacent blocking platforms (4) and between the blocking platforms (4) and the edge of the main flow channel (3), the bionic fish scale uniform flow area (5) is arranged on the left side of the flow dividing platform (11), and the fish scale simulating steps (12) are arranged in the bionic fish scale uniform flow area (5) and are distributed in a diagonal line manner;

the positioning notches (6) are arranged on one side of the bionic scale homogenizing zone (5) and are distributed in a diagonal manner;

a liquid flow hole sealing groove (8) arranged on the periphery of the negative electrolyte inlet (23) and the negative electrolyte outlet (24);

a semi-surrounding sealing groove (9) arranged at the periphery of the L-shaped main runner (3);

the surface structure of the negative plate frame and the positive plate frame are mirror images.

2. The bionic uniform-flow battery plate frame according to claim 1, wherein the positioning parts (7) are arranged at two corners of the positive plate frame and the negative plate frame and are distributed diagonally, the positioning parts (7) of the positive plate frame are through holes, and the positioning parts (7) of the negative plate frame are cylinders.

3. The bionic uniform flow battery plate frame according to claim 1 or 2, wherein a constant flow platform (13) is arranged between the electrode cavity and the bionic scale uniform flow area (5), and the height difference exists between the constant flow platform (13) and the bionic scale uniform flow area (5).

4. The bionic uniform-flow battery plate frame according to claim 1, wherein the blocking table (4) is Y-shaped in outer contour, linear in upper end, inclined in two side faces, connected with a protrusion at the lower end, and in arc transition of corners of the outer contour.

5. The bionic uniform-flow battery plate frame according to claim 4, wherein a linear sealing groove (10) is formed in the middle of a linear section of the blocking platform (4).

6. The biomimetic uniform flow battery plate frame according to claim 1, wherein the fish scale-like ladder (12) can be a single layer or multiple layers.