Weldable bipolar plate extrusion die head for flow battery

Abstract

The utility model relates to the technical field of die heads, and discloses a weldable bipolar plate extrusion die head for a flow battery, which comprises an upper die head, a lower die head movably assembled with the upper die head, a flow limiting block arranged at the top of the lower die head, and two shunting stop blocks, a groove is formed in the bottom of the upper die head, and the shape of the groove is matched with that of the flow limiting block; a semicircular first hole is formed in the end of the upper die head, a semicircular second hole matched with the first hole is formed in the end of the lower die head, the first hole and the second hole are attached to form an upper connecting hole, a lower connecting hole is formed below the upper connecting hole, two discharging ports are formed in the top of the lower die head, and the discharging ports are communicated with the lower connecting hole. The bottom of the upper die head and the top of the lower die head are attached to form a gap area and a lip at the end of the gap area. The gap area is divided into a conductive material channel and insulating material channels on the two sides of the conductive material channel by the shunting stop block, the two discharging ports are communicated with the insulating material channels, and the upper connecting hole is communicated with the conductive material channel. The device improves the performance of the flow battery.

Description

Technical Field

[0001] The utility model relates to the technical field of die heads, and particularly relates to a weldable bipolar plate extrusion die head for a flow battery. Background Art

[0002] A flow battery is a new type of battery technology that realizes energy storage and release through the circulation of fluids. Flow batteries have the advantages of high energy density, long life, low cost, etc., and are widely used in fields such as electric vehicles and energy storage systems.

[0003] An extrusion die head is a key device in the production process of a flow battery. It is responsible for extruding battery materials into a specific shape to form the bipolar plate of the battery. However, in the current production process, there are some problems.

[0004] Firstly, the internal channels of the extrusion die head cannot discharge materials in the expected manner. This is caused by unreasonable design or insufficient processing accuracy, resulting in the inability of battery materials to smoothly pass through the channels during extrusion, affecting product quality and production efficiency.

[0005] Secondly, since the bipolar plate with an insulating edge is composed of two different materials, the hardness and plasticization temperature difference of these two materials are relatively large, and it is easy to have the situation where the middle area encroaches on the edge area. This will cause the edge area of the battery to lack insulation performance, thereby affecting the safety and stability of the battery.

[0006] In addition, due to the small difference in the properties of the two materials, it is easy to cause blockage of the edge area channels. This is caused by the failure of the two materials to be fully mixed or the poor flow during extrusion, affecting the internal fluid circulation effect of the battery.

[0007] The adjustment of adding conductive fillers to the base material also requires precise control of the proportion, otherwise it will cause an imbalance between conductivity and toughness. Summary of the Utility Model

[0008] Aiming at the above deficiencies in the prior art, the weldable bipolar plate extrusion die head for a flow battery provided by the utility model solves the problems that the middle area of the internal channels of the extrusion die head encroaches on the edge area, the edge area channels are easily blocked, and the proportion of conductive fillers is unbalanced due to the differences between the two materials of the bipolar plate in the prior art.

[0009] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is: a weldable bipolar plate extrusion die head for a flow battery, including an upper die head, a lower die head movably assembled with the upper die head, a current limiting block arranged on the top of the lower die head, and two flow dividing blocks;

[0010] A groove is provided at the bottom of the upper die head, and the shape of the groove matches that of the flow-limiting block; a semi-circular first hole is provided at the end of the upper die head, and a semi-circular second hole matching the first hole is provided at the end of the lower die head. The first hole and the second hole are fitted together to form an upper connection hole. A lower connection hole is provided below the upper connection hole. Two discharge ports are provided at the top of the lower die head, and the discharge ports are communicated with the lower connection hole. The bottom of the upper die head and the top of the lower die head are fitted together to form a void area and a lip at the end of the void area.

[0011] The beneficial effects of the present utility model are as follows: During use, the bottom of the upper die head and the top of the upper die head are closed and assembled. The plasticized conductive bipolar plate raw material enters the die head through the upper connection hole, and the plasticized insulating material enters the die head through the lower connection hole. The material comes out from the discharge port and enters the void area. The material reaches the lip of the die head through the void area and then extrudes the sheet. The flow-limiting block adjusts the extrusion speed of the lip by controlling the flow rate of the material, and the shunt block separates the conductive bipolar plate raw material and the insulating material.

[0012] Further, in the above-mentioned extruding die head for a weldable bipolar plate of a flow battery, the shunt block separates the void area into a conductive material channel and insulating material channels on both sides of the conductive material channel. The two discharge ports are communicated with the insulating material channels, and the upper connection hole is communicated with the conductive material channel.

[0013] The beneficial effects of adopting the above further scheme are as follows: After the conductive bipolar plate raw material enters the die head through the upper connection hole, it flows through the conductive material channel; the insulating material enters the die head through the lower connection hole, then comes out from the discharge port and flows through the insulating material channel; the conductive bipolar plate raw material and the insulating material converge at the lip. In the extruded sheet, the boundary between the insulation and the conduction is obvious and in a straight line, which can increase the effective reaction area and reduce the electro-erosion phenomenon in the non-reaction area.

[0014] Further, in the above-mentioned extruding die head for a weldable bipolar plate of a flow battery, an adjusting bolt is provided on the flow-limiting block.

[0015] The beneficial effects of adopting the above further scheme are as follows: An adjusting bolt is provided on the flow-limiting block, which can make the flow-limiting block penetrate into or away from the void area, so as to accurately adjust and control the extrusion speed of the material at the lip.

[0016] Further, in the above-mentioned extruding die head for a weldable bipolar plate of a flow battery, the end of the shunt block is 20 mm away from the lip.

[0017] The beneficial effects of adopting the above further scheme are as follows: The conductive material channel and the insulating material channels of the upper die head and the lower die head are separated by the shunt block. At a distance of 20 mm from the lip, the conductive material channel and the insulating material channels are communicated, and 20 mm can just fully blend the conductive material and the insulating material together.

[0018] Further, for the weldable bipolar plate extrusion die head for the flow battery, the height of the void area is 2.5 mm.

[0019] The beneficial effect of adopting the above further scheme is that the selection of this design parameter takes into account factors such as the need for liquid flow and the manufacturing process of the die head.

[0020] The beneficial effect of the present utility model is that the two discharge ports in the device are communicated with the insulating material channel, and the upper connection hole is communicated with the conductive material channel. Through careful design and accurate connection, the shunt control of the conductive material and the insulating material is realized, improving the stability and reliability of the battery; an adjustment bolt is provided on the flow limiting block, and the flow rate and flow volume of the material can be flexibly controlled by adjusting the position and tightness of the adjustment bolt, so that it can be adjusted according to different production requirements and battery specifications, improving the adaptability and adjustability of the device and meeting the battery production requirements of different specifications and performances. Description of the Drawings

[0021] Figure 1 is the structural schematic diagram of the present device;

[0022] Figure 2 is the side schematic diagram of the present device;

[0023] Figure 3 is the rear view of the present device;

[0024] Figure 4 is the structural schematic diagram of the flow limiting block;

[0025] Figure 5 is the structural schematic diagram of the shunt block;

[0026] Figure 6 is the schematic diagram of the bottom of the upper die head;

[0027] Figure 7 is the top view of the lower die head;

[0028] Among them: 1. Upper die head; 2. Lower die head; 3. Flow limiting block; 4. Shunt block; 5. Groove; 6. First hole; 7. Second hole; 8. Upper connection hole; 9. Lower connection hole; 10. Discharge port; 11. Lip; 12. Conductive material channel; 13. Insulating material channel. Detailed Embodiments

[0029] The following describes the detailed embodiments of the present utility model to facilitate those skilled in the art of this technology to understand the present utility model. However, it should be clear that the present utility model is not limited to the scope of the detailed embodiments. For those of ordinary skill in the art of this technology, as long as various changes are within the spirit and scope of the present utility model defined and determined by the appended claims, these changes are obvious, and all utility models created using the concept of the present utility model are within the scope of protection.

[0030] As Figures 1 to 7 shown, this embodiment provides a weldable bipolar plate extrusion die head for a flow battery, including an upper die head 1 and a lower die head 2 movably assembled with the upper die head 1. A current limiting block 3 and two shunt blocks 4 are provided at the top of the lower die head 2. There is a groove 5 at the bottom of the upper die head 1, and the shape of the groove 5 matches that of the current limiting block 3. In addition, a semi-circular first hole 6 is provided at the end of the upper die head 1, and a semi-circular second hole 7 matching the first hole 6 is provided at the end of the lower die head 2. The first hole 6 and the second hole 7 are fitted to form an upper connection hole 8, and a lower connection hole 9 is provided below the upper connection hole 8. Two discharge ports 10 are provided at the top of the lower die head 2, and these discharge ports 10 communicate with the lower connection hole 9. The fitting of the bottom of the upper die head 1 and the top of the lower die head 2 forms a clearance area, and the height of the clearance area is 2.5 mm. The selection of this design parameter takes into account factors such as the need for liquid flow and the manufacturing process of the die head.

[0031] The function of the shunt block 4 is to divide the clearance area into a conductive material channel 12 and insulating material channels 13 on both sides of the conductive material channel 12. The two discharge ports 10 communicate with the insulating material channels 13, and the upper connection hole 8 communicates with the conductive material channel 12. This design can ensure that the liquid in the flow battery can flow through the appropriate channels while maintaining the separation between the conductive material and the insulating material; there is a lip 11 at the end of the clearance area, and the end of the shunt block 4 is 20 mm away from the lip 11, and 20 mm can just fully integrate the conductive material and the insulating material together.

[0032] In order to achieve the control of liquid flow, an adjusting bolt is also provided on the current limiting block 3. By adjusting the tightness of the adjusting bolt, the flow rate and flow volume of the liquid between the conductive material channel 12 and the insulating material channel 13 can be changed, so as to achieve the adjustment of the battery performance.

[0033] Through reasonable structure and channel settings, this device realizes the control of liquid flow and the separation of conductive materials and insulating materials, thereby improving the performance and reliability of the flow battery.

Claims

1. A weldable bipolar plate extrusion die for a flow battery, characterized in that: It comprises an upper die head (1), a lower die head (2) movably assembled with the upper die head (1), a flow limiting block (3) arranged on the top of the lower die head (2), and two flow dividing blocks (4); A groove (5) is arranged at the bottom of the upper die head (1), and the shape of the groove (5) matches the current limiting block (3); a semicircular first hole (6) is arranged at the end of the upper die head (1), and a semicircular second hole (7) matching the first hole (6) is arranged at the end of the lower die head (2); the first hole (6) and the second hole (7) are fitted together to form an upper connecting hole (8); a lower connecting hole (9) is arranged below the upper connecting hole (8); two discharge ports (10) are arranged at the top of the lower die head (2), and the discharge ports (10) are connected to the lower connecting hole (9); the bottom of the upper die head (1) and the top of the lower die head (2) are fitted together to form a gap area and a lip (11) at the end of the gap area.

2. The weldable bipolar plate extrusion die for a flow battery according to claim 1, characterized in that: The diverter block (4) divides the gap area into a conductive material channel (12) and insulating material channels (13) on both sides of the conductive material channel (12); the two discharge ports (10) are connected to the insulating material channel (13); and the upper connecting hole (8) is connected to the conductive material channel (12).

3. The weldable bipolar plate extrusion die for a flow battery according to claim 1, characterized in that: An adjusting bolt is arranged on the current limiting block (3).

4. The weldable bipolar plate extrusion die for a flow battery according to claim 1, characterized in that: The end of the diversion block (4) is 20 mm away from the lip (11).

5. The weldable bipolar plate extrusion die for a flow battery according to claim 1, characterized in that: The height of the gap area is 2.5 mm.

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