Hole plugging structure of liquid inlet plate of flow battery stack

Abstract

The present invention discloses a plugging hole structure of a liquid flow battery stack inlet plate, wherein the liquid flow plate is provided with a countersunk hole; the countersunk hole comprises: an inner end connected to an electrolyte flow channel, an outer end provided on the outer surface of the liquid flow plate, and a main channel; the outer end of the countersunk hole is an expanded end after expansion processing; an inner plugging hole member and an outer plugging hole member are provided inside the countersunk hole; the inner plugging hole member is a cylindrical plastic plug rod inserted into the main channel; the outer plugging hole member is a disc-shaped plastic plug inserted into the expanded end; a conical protrusion is provided on the inner side surface of the plastic plug, and the conical protrusion is coaxial with the plastic plug; a conical groove matching the protrusion is provided on the plastic plug rod; the protrusion of the plastic plug is inserted into the groove of the plastic plug rod, and the protrusion and the groove are integrally connected by rotational friction welding. The plugging hole structure of the liquid flow battery stack inlet plate of the present invention has a good sealing effect on the countersunk hole and can prevent electrolyte leakage.

Description

Technical Field

[0001] The invention relates to a hole blocking structure of a liquid inlet plate of a liquid flow battery stack. Background Art

[0002] Vanadium Redox Battery (VRB) is a new type of chemical power source that stores and releases electrical energy through the mutual conversion of vanadium ions in different valence states.

[0003] The liquid flow battery stack is an important device in the all-vanadium liquid flow battery, and the liquid flow battery stack is often equipped with a liquid inlet plate.

[0004] An electrolyte flow channel is generally provided inside the liquid inlet plate, and the liquid inlet plate is also provided with a countersunk hole connected to the electrolyte flow channel. In order to prevent electrolyte leakage, the countersunk hole needs to be plugged. Summary of the invention

[0005] The object of the present invention is to provide a plugging structure for a liquid inlet plate of a flow battery stack, which has a good sealing effect on the countersunk holes and can prevent electrolyte leakage.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is to design a plugging structure of a liquid flow battery stack inlet plate, wherein the liquid inlet plate is provided with: an electrolyte flow channel provided inside the liquid inlet plate, and a countersunk hole connected to the electrolyte flow channel;

[0007] The counterbore includes: an inner end connected to the electrolyte flow channel, an outer end provided on the outer surface of the liquid inlet plate, and a cylindrical main channel connecting the inner end and the outer end; the outer end of the counterbore is an expanded end that has been expanded, and the expanded end is coaxial with the main channel;

[0008] The countersunk hole is provided with an inner hole blocking member and an outer hole blocking member;

[0009] The inner hole plugging member is a cylindrical plastic plugging rod inserted into the main channel, the plastic plugging rod is coaxial with the main channel, and the plastic plugging rod and the inner peripheral wall of the main channel are gap-matched; the side peripheral surface of the plastic plugging rod is also coated with glue;

[0010] The outer hole plugging member is a disc-shaped plastic plug inserted into the expanded hole end, the plastic plug is coaxial with the expanded hole end, and the plastic plug is gap-matched with the inner peripheral wall of the expanded hole end;

[0011] The plastic plug includes: an outer side surface that is flush with the outer surface of the liquid inlet plate, and an inner side surface that is connected to the plastic plug rod; the outer side surface and the inner side surface of the plastic plug are arranged opposite to each other;

[0012] A conical protrusion is provided on the inner side of the plastic plug, and the conical protrusion is coaxial with the plastic plug; a conical groove matching the protrusion is provided on the plastic plug rod;

[0013] The protrusion of the plastic plug is inserted into the groove of the plastic plug rod, and the protrusion and the groove are integrally connected through rotational friction welding.

[0014] Preferably, the plastic stopper rod is flush with the inner end opening of the counterbore.

[0015] The advantages and beneficial effects of the present invention are: providing a hole plugging structure for a liquid inlet plate of a flow battery stack, which has a good sealing effect on the countersunk holes and can prevent electrolyte leakage.

[0016] The countersunk hole is closed by an integrally connected plastic plug and a plastic plug rod, which has a good sealing effect and can prevent electrolyte leakage.

[0017] The protrusion of the plastic plug is inserted into the groove of the plastic plug rod, and the protrusion and the groove are integrally connected by rotational friction welding, so the installation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the present invention. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0020] The technical solution specifically implemented in the present invention is:

[0021] like Figure 1 As shown, a plugging structure of a liquid inlet plate 1 of a flow battery stack, wherein the liquid inlet plate 1 is provided with: an electrolyte flow channel 2 provided inside the liquid inlet plate 1, and a countersunk hole connected to the electrolyte flow channel 2;

[0022] The countersunk hole comprises: an inner end connected to the electrolyte flow channel 2, an outer end arranged on the outer surface of the liquid inlet plate 1, and a cylindrical main channel connecting the inner end and the outer end; the outer end of the countersunk hole is an expanded hole end after expansion treatment, and the expanded hole end is coaxial with the main channel;

[0023] The countersunk hole is provided with an inner hole blocking member and an outer hole blocking member;

[0024] The inner hole plugging member is a cylindrical plastic plug rod 3 inserted into the main channel. The plastic plug rod 3 is coaxial with the main channel, and the plastic plug rod 3 is gap-matched with the inner peripheral wall of the main channel. The side peripheral surface of the plastic plug rod 3 is also coated with glue.

[0025] The outer hole plugging member is a disc-shaped plastic plug 4 inserted into the expanded hole end, the plastic plug 4 is coaxial with the expanded hole end, and the plastic plug 4 is gap-matched with the inner peripheral wall of the expanded hole end;

[0026] The plastic plug 4 comprises: an outer side surface that is flush with the outer surface of the liquid inlet plate 1, and an inner side surface that is connected to the plastic plug rod 3; the outer side surface and the inner side surface of the plastic plug 4 are arranged opposite to each other;

[0027] The inner side of the plastic plug 4 is provided with a conical protrusion 5, which is coaxial with the plastic plug 4; the plastic plug rod 3 is provided with a conical groove matching with the protrusion 5;

[0028] The protrusion 5 of the plastic plug 4 is inserted into the groove of the plastic plug rod 3, and the protrusion 5 and the groove are integrally connected by rotational friction welding.

[0029] The plastic plug rod 3 is flush with the inner end opening of the countersunk hole.

[0030] The countersunk hole is closed by a plastic plug 4 and a plastic plug rod 3 which are integrally connected, and has a good sealing effect and can prevent leakage of electrolyte.

[0031] The protrusion 5 of the plastic plug 4 is inserted into the groove of the plastic plug rod 3, and the protrusion 5 and the groove are integrally connected by rotational friction welding, which is convenient for installation.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A plugging structure for a liquid inlet plate of a flow battery stack, characterized in that: The liquid inlet plate is provided with: an electrolyte flow channel provided inside the liquid inlet plate, and a countersunk hole connected to the electrolyte flow channel; The counterbore includes: an inner end connected to the electrolyte flow channel, an outer end provided on the outer surface of the liquid inlet plate, and a cylindrical main channel connecting the inner end and the outer end; the outer end of the counterbore is an expanded end that has been expanded, and the expanded end is coaxial with the main channel; The countersunk hole is provided with an inner hole blocking member and an outer hole blocking member; The inner hole plugging member is a cylindrical plastic plugging rod inserted into the main channel, the plastic plugging rod is coaxial with the main channel, and the plastic plugging rod and the inner peripheral wall of the main channel are gap-matched; the side peripheral surface of the plastic plugging rod is also coated with glue; The outer hole plugging member is a disc-shaped plastic plug inserted into the expanded hole end, the plastic plug is coaxial with the expanded hole end, and the plastic plug is gap-matched with the inner peripheral wall of the expanded hole end; The plastic plug includes: an outer side surface that is flush with the outer surface of the liquid inlet plate, and an inner side surface that is connected to the plastic plug rod; the outer side surface and the inner side surface of the plastic plug are arranged opposite to each other; A conical protrusion is provided on the inner side of the plastic plug, and the conical protrusion is coaxial with the plastic plug; a conical groove matching the protrusion is provided on the plastic plug rod; The protrusion of the plastic plug is inserted into the groove of the plastic plug rod, and the protrusion and the groove are integrally connected through rotational friction welding.

2. The plugging structure of the liquid inlet plate of the flow battery stack according to claim 1, characterized in that: The plastic plug rod is flush with the inner end opening of the counterbore.

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