CN219800924U

CN219800924U - High-conductivity bipolar plate for flow battery and continuous processing device thereof

Info

Publication number: CN219800924U
Application number: CN202321132129.9U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Shanghai Jin'an Huicang Energy Co ltd
Current assignee: Shanghai Jin'an Huicang Energy Co ltd
Priority date: 2023-05-12
Filing date: 2023-05-12
Publication date: 2023-10-03
Anticipated expiration: 2033-05-12

Abstract

The utility model belongs to the field of manufacturing of flow batteries, and particularly relates to a high-conductivity bipolar plate for a flow battery and a continuous processing device thereof. The utility model thermally covers the high conductive films on the upper and lower surfaces of the bipolar plate, improves the conductivity of the bipolar plate, can continuously process, solves the defect of poor processability caused by high filling amount of the conventional conductive plastic bipolar plate, has simple equipment, improves the production efficiency, and reduces the cost of the bipolar plate.

Description

High-conductivity bipolar plate for flow battery and continuous processing device thereof

Technical Field

The utility model belongs to the field of manufacturing of flow batteries, and particularly relates to a high-conductivity bipolar plate for a flow battery and a continuous processing device thereof.

Background

The flow battery is an ideal electrochemical energy storage technology for solving the problem of high-capacity energy storage of renewable energy sources such as wind energy, solar energy and the like. Bipolar plates, which are key components of flow batteries, need to be balanced in terms of mechanical strength, electrical conductivity, corrosion resistance, and low cost, are of three types: rigid graphite plates, flexible graphite plates, and conductive plastic plates. The hard graphite plate has high cost, low mechanical strength and cannot be large in size.

The flexible graphite plate is formed by laminating natural graphite, and has the following problems: the conductive plastic plate is easy to swell and delaminate after being placed in electrolyte for a long time, the mechanical strength of the conductive plastic plate is insufficient, the sealing is difficult, and the processing efficiency is low; moreover, the high addition of conductive fillers makes extrusion processes difficult to achieve in order to obtain high electrical conductivity; therefore, both the conductivity and the mechanical strength of the conductive plastic plate need to be improved. Therefore, a novel processing device is necessary to prepare the conductive plastic bipolar plate, so that the conductive plastic bipolar plate has high conductivity and good mechanical strength.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide the high-conductivity bipolar plate for the flow battery and the continuous processing device thereof.

In order to achieve the above purpose, the technical scheme of the utility model is as follows.

The utility model provides a high conductive bipolar plate for flow battery, includes the base plate, and this base plate upper and lower two sides all is provided with the conductive film, and the conductive film is conductive layer and basic film laminating, and the base plate is laminated with the conductive layer.

The continuous processing device of the high-conductivity bipolar plate for the flow battery comprises a pair roller calender, wherein an extruder and a film coating device of a conductive film of a substrate are arranged corresponding to a feed inlet of the pair roller calender, and a shaping roller, a traction device and a slicing machine are sequentially arranged corresponding to a discharge outlet of the pair roller calender.

Further, the feed inlet of the twin-roll calender is provided with a die head device corresponding to the extruder.

Further, a stripping device is arranged at the discharge end of the shaping roller.

Further, the laminating device is an unreeling device.

Further, the two rollers of the twin-roll calender are respectively a soft roller and a hard roller; the soft roller is made of rubber rollers, and the hard roller is made of steel rollers; the distance between the two rollers is 0.3-2.0 mm; the diameter of the roller is 0.6 m-1.5 m.

Further, the demolding device is two sets of base film winding devices and is arranged on two sides of the discharge end of the shaping roller.

Compared with the prior art, the utility model has the beneficial effects that.

1. The conductive film is adopted to thermally cover the surface of the bipolar plate to form a high conductive layer, so that the conductivity of the bipolar plate is improved, and the defect that the extrusion process is difficult to realize due to poor dispersibility caused by the fact that the conductivity is improved by adopting the high addition amount of the conductive filler in the prior art is overcome.

2. The conductive film thermal lamination process is adopted, the conductive layers on the two sides are compact and uniform, the contact resistance between the bipolar plate and the electrodes is reduced, and the energy efficiency of the battery is improved. Meanwhile, the thermal lamination process is simple, the consistency is good, the continuous batch processing can be realized, the processing efficiency is improved, and the cost is reduced.

Drawings

FIG. 1 is a schematic view of a continuous processing apparatus of the present utility model;

fig. 2 is a schematic view of a highly conductive bipolar plate for a flow battery according to the present utility model.

In the figure, 1 a twin screw extruder; 2 die head device; 3 pairs of roller calenders; 4, a film coating device; 5, shaping rollers; 6, demolding device; 7, a traction device; 8 slicing machine; 9 a substrate; 10 conductive film.

Detailed Description

The present utility model is further described with reference to the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic and non-physical drawings, and are not to be construed as limiting the patent of the utility model; for better illustration of the embodiments of the present utility model, some of the elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Example 1.

As shown in fig. 1, the present embodiment provides a continuous processing device of a high-conductivity bipolar plate for a flow battery, wherein the continuous processing device is sequentially provided with a twin-screw extruder 1, a die head 2, a twin-roll calender 3, a shaping roller 5, a stripping device 6, a traction device 7 and a slicer 8 along a feeding direction; the double-screw extruder 1 and the die head 2 are placed in an L shape with other devices; the output end of the die head 2 corresponds to the two rolls of the twin-roll calender 3; the two sides above the twin-roll calender 3 are respectively provided with a film laminating device 4, and the film laminating devices 4 are unreeling devices, so that the substrate can be conveniently pressed with the conductive films synchronously on the two sides of the substrate entering the twin-roll calender; the stripping device 6 is two sets of base film winding devices and is arranged on two sides of the discharge end of the shaping roller, so that the bipolar plate can be stripped and wound simultaneously, the stripping time is shortened, and the winding efficiency is improved.

Wherein, the two rollers of the twin-roll calender 3 are respectively a soft roller and a hard roller, and the hard roller is discharged into the shaping roller 5; the soft roller is made of rubber rollers, and the hard roller is made of steel rollers; the distance between the two rollers is 0.3-2.0 mm; the diameter of the roller is 0.6 m-1.5 m.

In the specific implementation process, a double-screw extruder 1 extrudes a bipolar plate substrate through a die head device 2, and conveys conductive films through film covering devices 4 arranged on two sides above a twin-roll calender 3, the substrate and the conductive films on two sides are pressed simultaneously, the conductive films are respectively arranged on two sides of a front roll (rubber roll) and a rear roll (steel roll) of the twin-roll calender 3, the diameters of the two rolls are 1.0m, and the distance between the two rolls is 0.5mm; the conductive films are positioned on the upper side and the lower side of the bipolar plate substrate, and are formed integrally with the bipolar plate substrate through hot pressing and compounding of a twin-roll calender 3, and then the bipolar plate is cut into a finished product through a slicer 8 after the base film is subjected to film stripping through a film stripping device 6.

As shown in fig. 2, in this embodiment, the high-conductivity bipolar plate for a flow battery includes a substrate 9, conductive films 10 are disposed on both upper and lower surfaces of the substrate 9, the conductive films 10 are bonded to the base film, and the substrate 9 is bonded to the conductive layer.

Claims

1. The utility model provides a high conductive bipolar plate for flow battery, includes the base plate, its characterized in that, the base plate upper and lower two sides all is provided with the conductive film, the conductive film is conducting layer and basic film laminating, the base plate with the conducting layer laminating.

2. A continuous processing apparatus for producing the highly conductive bipolar plate for a flow battery of claim 1, comprising a twin roll calender, characterized in that: the extruder of the base plate and the film laminating device of the conductive film are arranged corresponding to the feed inlet of the double-roller calender, and the shaping roller, the traction device and the slicing machine are sequentially arranged corresponding to the discharge outlet of the double-roller calender.

3. The continuous processing apparatus according to claim 2, wherein: the feed inlet of the twin-roll calender is provided with a die head device corresponding to the extruder.

4. The continuous processing apparatus according to claim 2, wherein: and a stripping device is arranged at the discharge end of the shaping roller.

5. The continuous processing apparatus of a highly conductive bipolar plate for a flow battery according to claim 2, wherein the film coating apparatus is an unreeling apparatus.

6. The continuous processing device of the high-conductivity bipolar plate for the flow battery according to claim 2, wherein the two rollers of the twin-roll calender are respectively a soft roller and a hard roller, and the hard roller is discharged into a shaping roller; the soft roller is made of rubber rollers, and the hard roller is made of steel rollers; the distance between the two rollers is 0.3-2.0 mm; the diameter of the roller is 0.6 m-1.5 m.

7. The continuous processing device of a high-conductivity bipolar plate for a flow battery according to claim 4, wherein the stripping device is two sets of base film winding devices and is arranged at two sides of a discharge end of a shaping roller.