CN112171011A

CN112171011A - Welding device for high-voltage energy accumulator of electric automobile

Info

Publication number: CN112171011A
Application number: CN202011162889.5A
Authority: CN
Inventors: 孙良平
Original assignee: Ningbo Hongju Intelligent Equipment Co ltd
Current assignee: Ningbo Hongju Intelligent Equipment Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-01-05

Abstract

The invention discloses a welding device for a high-voltage energy accumulator of an electric automobile, which comprises a first electrode, a second electrode, an air charging device and a sealing cavity, wherein the sealing cavity hermetically covers the first electrode and the second electrode on the surface of a region to be welded of a workpiece; in the working process, the inflating device inflates the inner space of the workpiece and the inner part of the sealed cavity to keep the air pressure in the sealed cavity balanced with the air pressure in the workpiece, the second electrode is placed on the surface of a welding area of the workpiece and covers the inflating hole, electric arc is generated between the first electrode and the second electrode to generate high temperature, the surface of the second electrode, which is in contact with the workpiece, is melted, the second electrode is hermetically fixed on the workpiece and covers the inflating hole in a sealing mode after cooling, then the gas in the sealed cavity is discharged, and finally the sealed cavity is removed from the workpiece to finish welding.

Description

Welding device for high-voltage energy accumulator of electric automobile

Technical Field

The invention relates to the technical field of welding, in particular to a welding device for a high-voltage energy accumulator of an electric automobile.

Background

An accumulator is an energy storage device in a hydropneumatic system. The energy in the system is converted into compression energy or potential energy to be stored at a proper time, and when the system needs the energy, the compression energy or the potential energy is converted into hydraulic energy or air pressure and the like to be released, and the energy is supplied to the system again. When the system pressure is increased instantaneously, it can absorb the energy of the part to ensure the pressure of the whole system is normal.

The automobile energy accumulator in the prior art is a reusable energy accumulator generally, after the energy accumulator is used for a long time, when internal gas is leaked gradually to cause insufficient air pressure, a special inflating device can be used for inflating and pressure supplementing the tank body, but the energy accumulator is used more and more widely, the using amount is more and more, in order to save cost and facilitate replacement, a disposable energy accumulator is designed, the tank body is of a full-sealing structure and cannot be reopened after primary sealing, the tank body is made of metal materials, welding is needed in the sealing process, however, the internal part of the tank body needs to be inflated firstly before welding, welding devices need to be welded under a high-pressure environment, and welding devices which are not suitable in the prior art are used for welding the energy accumulator under the high-pressure environment.

Disclosure of Invention

The invention aims to provide a welding device for a high-voltage energy accumulator of an electric automobile, which is used for solving at least one technical problem in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides an electric automobile high pressure energy storage ware welding set, includes first electrode, second electrode, aerating device and sealed chamber, sealed chamber will first electrode with the sealed cover of second electrode treats the welding area on the surface at the work piece, aerating device with sealed chamber intercommunication, the work piece is treated the surface in welding area and is equipped with the gas charging hole, gas charging hole with the inner space intercommunication of work piece, gas charging hole with sealed chamber intercommunication.

The invention provides a welding device for a high-pressure energy accumulator of an electric automobile, which comprises a first electrode, a second electrode, a gas charging device, a gas discharging device and a welding device.

In a possible implementation manner of the invention, the welding device for the high-voltage energy accumulator of the electric vehicle further comprises a machine body, wherein a guide cylinder is fixedly connected to the machine body, the guide cylinder is vertically arranged, the first electrode is located on the inner side of the guide cylinder, the upper end of the first electrode is connected with the upper end of the guide cylinder in a sliding manner along the vertical direction, and the first electrode is located right above the second electrode; the sealed cavity is formed by the inner side space of the guide cylinder, a gap is formed between the outer wall of the lower end of the first electrode and the inner wall of the guide cylinder, and the inflation device is communicated with the gap.

Through the possible embodiment of the invention, the distance between the first electrode and the second electrode is changed by sliding the first electrode up and down relative to the guide cylinder, a gap is always formed between the lower end of the first electrode and the inner wall of the guide cylinder in the sliding process of the first electrode, and the inflation device is communicated with the gap, so that the sealed cavity can be inflated.

In a possible embodiment of the present invention, a first driving device is fixedly mounted on the machine body, and the first driving device is in transmission connection with the first electrode.

With the above possible embodiments of the present invention, the first driving device is used for driving the first electrode to move in the vertical direction, and the first driving device may adopt a pneumatic cylinder or a hydraulic cylinder.

In a possible implementation manner of the present invention, the inflation device includes an air storage tank, an inflation tube and an exhaust tube, one end of the inflation tube is communicated with the air storage tank, the other end of the inflation tube is communicated with the seal cavity, the exhaust tube is communicated with a portion of the inflation tube located between the air storage tank and the seal cavity, a throttle valve is installed on the inflation tube, a relief valve is installed on the exhaust tube, and the throttle valve is located on a side of the exhaust tube away from the seal cavity.

According to the possible embodiment of the invention, when the sealed cavity is inflated, the pressure relief valve is closed, the throttle valve is opened, the high-pressure gas in the gas storage tank is inflated into the sealed cavity through the inflation tube, the sealed cavity needs to be decompressed after welding is finished, and then the guide cylinder is removed from the surface of the workpiece, so that the throttle valve can be closed first, the gas storage tank and the sealed cavity are disconnected, then the pressure relief valve is opened, and the high-pressure gas in the sealed cavity is exhausted from the exhaust pipe, and the decompression is completed.

In a possible embodiment of the present invention, a profiling groove is provided on the lower end surface of the guide cylinder, the shape of the inner wall of the profiling groove is the same as the surface of the region to be welded of the workpiece, the surface of the region to be welded of the workpiece is an upward convex curved surface, the inner wall of the profiling groove is an upward concave curved surface, and the inner wall of the profiling groove can be tightly attached to the surface of the region to be welded of the workpiece.

Through the possible embodiment of the invention, the surface of the area to be welded of the workpiece is positioned on the top surface of the workpiece, the workpiece is lifted upwards to enable the top surface of the workpiece to be abutted against the lower end surface of the guide cylinder, and the profiling groove can improve the sealing performance of the sealing cavity.

In a possible implementation manner of the invention, a circle of first sealing groove is arranged on the inner wall of the profiling groove, and a first sealing ring is fixedly connected in the first sealing groove.

Through the possible embodiment of the invention, in the welding process, the first sealing ring is in sealing contact with the surface of the area to be welded of the workpiece, and the first sealing ring can further improve the sealing performance of the sealing cavity.

In a possible embodiment of the present invention, a second driving device is further mounted on the machine body, the second driving device is in transmission connection with the workpiece, and the second driving device is used for driving the workpiece to move in the vertical direction.

Through the possible embodiment of the invention, in the machining process, the second driving device moves the workpiece upwards to enable the surface of the area to be welded of the workpiece to be abutted against the inner wall of the profiling groove, the first sealing ring is pressed on the surface of the workpiece, and the sealing cavity seals the first electrode and the second electrode inside, so that the sealing cavity and the inner space of the workpiece can be inflated and pressurized conveniently.

In a possible implementation manner of the present invention, a clamping table is fixedly connected to the machine body, the clamping table is connected to the machine body in a sliding manner along a vertical direction, the second driving device is connected to the clamping table in a transmission manner, and a fixing station is arranged on an upper surface of the clamping table.

According to the possible embodiment of the invention, the workpiece is fixed on the fixing station, the fixing station can adopt the fixing hole, the workpiece is inserted into the fixing hole to position and fix the workpiece, or the workpiece is clamped and fixed on the fixing station by using the clamp, the second driving device can adopt the pneumatic cylinder or the hydraulic cylinder, and the second driving device drives the clamping table to ascend or descend.

In a possible implementation manner of the present invention, a second sealing groove is formed on an inner side wall of an upper end of the guide cylinder, a second sealing ring is fixedly connected in the second sealing groove, the second sealing ring is in sealing sliding connection with an outer wall of the first electrode, and the gap is located between the second sealing ring and the sealing cavity.

Through the possible embodiments of the present invention, the second sealing ring can seal the gap, and gas leakage from the gap is avoided.

Drawings

FIG. 1 is a schematic structural diagram of a welding device for a high-pressure accumulator of an electric vehicle according to an embodiment of the invention;

FIG. 2 is a front view in the Y-axis direction in an embodiment of the present invention;

FIG. 3 is a schematic view of a guide cylinder structure in an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic view showing a connection structure of an inflation tube and an exhaust tube in the embodiment of the present invention;

FIG. 6 is a partial enlarged view at B in FIG. 4;

fig. 7 is a partially enlarged view at C in fig. 4.

Description of reference numerals:

110. a first electrode; 120. a second electrode; 200. an inflator; 210. a gas storage tank; 220. an inflation tube; 230. an exhaust pipe; 240. a throttle valve; 250. a pressure relief valve; 400. a workpiece; 410. an inflation hole; 500. a body; 300. a guide cylinder; 310. a gap; 320. sealing the cavity; 330. a profiling groove; 340. a first seal groove; 350. a first seal ring; 360. a second seal groove; 370. a second seal ring; 610. a first driving device; 620. a second driving device; 700. a clamping table; 710. and (5) fixing the station.

Detailed Description

The present invention is described in further detail below with reference to the attached drawings.

In the drawings, X-Y-Z are coordinate axes of a spatial coordinate system, and hereinafter, "upper" means a direction indicated by the Z axis, "lower" means a direction opposite to the direction indicated by the Z axis, and the fact that a designated member is located above another member means that another member and the designated member are arranged in order along the direction indicated by the Z axis.

Referring to fig. 1 to 4, in an embodiment of the present invention, a welding device for a high-voltage accumulator of an electric vehicle is provided, which includes a first electrode 110, a second electrode 120, an air charging device 200, and a sealing chamber 320, wherein the sealing chamber 320 hermetically covers the first electrode 110 and the second electrode 120 on a surface of a region to be welded of a workpiece 400, the air charging device 200 is communicated with the sealing chamber 320, the surface of the region to be welded of the workpiece 400 is provided with an air charging hole 410, the air charging hole 410 is communicated with an inner space of the workpiece 400, and the air charging hole 410 is communicated with the sealing chamber 320.

In the welding device for the high-voltage accumulator of the electric vehicle, during operation, the gas charging device 200 charges gas into the inner space of the workpiece 400 and the inner space of the sealed cavity 320, so that the gas pressure in the sealed cavity 320 is balanced with the gas pressure in the workpiece 400, the second electrode 120 is placed on the surface of the welding area of the workpiece 400 and covers the gas charging hole 410, the first electrode 110 is close to the second electrode 120, an electric arc is generated between the first electrode 110 and the second electrode 120, high temperature is generated, the surface of the second electrode 120, which is in contact with the workpiece 400, is melted, after the first electrode 110 is removed, the workpiece 400 is gradually cooled, the second electrode 120 is hermetically fixed on the workpiece 400 and hermetically covers the gas charging hole 410, then the gas in the sealed cavity 320 is discharged, and finally the sealed cavity 320 is removed from the workpiece 400, thereby completing the welding operation.

In a possible implementation manner of this embodiment, the welding device for the high-voltage accumulator of the electric vehicle further includes a machine body 500, the machine body 500 is fixedly connected with a guide cylinder 300, the guide cylinder 300 is vertically disposed, the first electrode 110 is located inside the guide cylinder 300, the upper end of the first electrode 110 is slidably connected with the upper end of the guide cylinder 300 along the vertical direction, and the first electrode 110 is located right above the second electrode 120; the sealed chamber 320 is formed by a space inside the guide cylinder 300, a gap 310 is formed between the outer wall of the lower end of the first electrode 110 and the inner wall of the guide cylinder 300, and the inflator 200 communicates with the gap 310.

Through the above possible embodiments of the present embodiment, the first electrode 110 slides up and down relative to the guide cylinder 300 to change the distance between the first electrode 110 and the second electrode 120, and during the sliding process of the first electrode 110, a gap 310 is always present between the lower end of the first electrode 110 and the inner wall of the guide cylinder 300, and the inflator 200 is communicated with the gap 310, so that the sealed cavity 320 can be inflated.

In a possible implementation manner of this embodiment, the body 500 is fixedly mounted with a first driving device 610, and the first driving device 610 is in transmission connection with the first electrode 110.

With the above possible implementation manner of the present embodiment, the first driving device 610 is used to drive the first electrode 110 to move in the vertical direction, and the first driving device 610 may adopt a pneumatic cylinder or a hydraulic cylinder.

Referring to fig. 1 and 5, in a possible implementation manner of this embodiment, the inflation device 200 includes an air tank 210, an inflation tube 220 and an exhaust tube 230, one end of the inflation tube 220 is communicated with the air tank 210, the other end of the inflation tube 220 is communicated with the sealed cavity 320, the exhaust tube 230 is communicated with the portion of the inflation tube 220 located between the air tank 210 and the sealed cavity 320, a throttle valve 240 is installed on the inflation tube 220, a pressure relief valve 250 is installed on the exhaust tube 230, and the throttle valve 240 is located on a side of the exhaust tube 230 away from the sealed cavity 320.

Through the above possible implementation manner of this embodiment, when the sealed cavity 320 is inflated, the pressure relief valve 250 is closed, the throttle valve 240 is opened, the high-pressure gas in the gas storage tank 210 is inflated into the sealed cavity 320 through the inflation tube 220, after welding, the sealed cavity 320 needs to be depressurized, and then the guide cylinder 300 is removed from the surface of the workpiece 400, so that the throttle valve 240 may be closed first, the gas storage tank 210 and the sealed cavity 320 are disconnected, then the pressure relief valve 250 is opened, and the high-pressure gas in the sealed cavity 320 is exhausted from the exhaust pipe 230, so as to complete depressurization.

Referring to fig. 4, 6 and 7, in a possible implementation manner of this embodiment, a profiling groove 330 is provided on the lower end surface of the guide cylinder 300, the shape of the inner wall of the profiling groove 330 is the same as that of the area to be welded of the workpiece 400, the surface of the area to be welded of the workpiece 400 is an upward convex curved surface, the inner wall of the profiling groove 330 is an upward concave curved surface, and the inner wall of the profiling groove 330 can be tightly attached to the surface of the area to be welded of the workpiece 400.

With the above possible embodiment of the present embodiment, the surface of the region to be welded of the workpiece 400 is located on the top surface of the workpiece 400, and the profiling groove 330 can improve the sealing performance of the sealing cavity 320 by lifting up the workpiece 400 so that the top surface of the workpiece 400 abuts against the lower end surface of the guide cylinder 300.

In a possible implementation manner of this embodiment, a circle of first seal groove 340 is disposed on an inner wall of the profiling groove 330, and a first seal ring 350 is fixedly connected in the first seal groove 340.

With the above possible embodiments of the present embodiment, during welding, the first sealing ring 350 is in sealing contact with the surface of the region to be welded of the workpiece 400, and the first sealing ring 350 can further improve the sealing performance of the sealing cavity 320.

Referring to fig. 1 and fig. 2, in a possible implementation manner of the present embodiment, a second driving device 620 is further installed on the machine body 500, the second driving device 620 is in transmission connection with the workpiece 400, and the second driving device 620 is used for driving the workpiece 400 to move in the vertical direction.

With the above possible embodiments of the present embodiment, during the machining process, the second driving device 620 moves the workpiece 400 upwards to make the surface of the region to be welded of the workpiece 400 abut against the inner wall of the profiling groove 330, the first sealing ring 350 presses against the surface of the workpiece 400, and the sealing cavity 320 seals the first electrode 110 and the second electrode 120 inside, so as to inflate and pressurize the sealing cavity 320 and the inner space of the workpiece 400.

In a possible implementation manner of this embodiment, a clamping table 700 is fixedly connected to the machine body 500, the clamping table 700 is slidably connected to the machine body 500 along a vertical direction, the second driving device 620 is in transmission connection with the clamping table 700, and a fixing station 710 is disposed on an upper surface of the clamping table.

Through the above possible implementation manner of the embodiment, the workpiece 400 is fixed on the fixing station 710, the fixing station 710 may employ a fixing hole, the workpiece 400 is inserted into the fixing hole to position and fix the workpiece 400, or the workpiece 400 is clamped and fixed on the fixing station 710 by using a clamp, the second driving device 620 may employ a pneumatic cylinder or a hydraulic cylinder, and the second driving device 620 drives the clamping table 700 to ascend or descend.

Referring to fig. 4, in a possible implementation manner of the present embodiment, a second sealing groove 360 is disposed on an inner sidewall of an upper end of the guide cylinder 300, a second sealing ring 370 is fixedly connected in the second sealing groove 360, the second sealing ring 370 is in sealing sliding connection with an outer wall of the first electrode 110, and the gap 310 is located between the second sealing ring 370 and the sealing cavity 320.

With the above possible embodiments of the present embodiment, the second sealing ring 370 can seal the gap 310, and prevent gas from leaking from the gap 310.

The above examples are only illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments of the present invention as required without any inventive contribution thereto after reading the present specification, but all such modifications are intended to be protected by the following claims.

Claims

1. The welding device for the high-voltage accumulator of the electric automobile is characterized by comprising a first electrode (110), a second electrode (120), an air charging device (200) and a sealing cavity (320), wherein the sealing cavity (320) is used for sealing and covering the first electrode (110) and the second electrode (120) on the surface of a region to be welded of a workpiece (400), the air charging device (200) is communicated with the sealing cavity (320), an air charging hole (410) is formed in the surface of the region to be welded of the workpiece (400), the air charging hole (410) is communicated with the inner space of the workpiece (400), and the air charging hole (410) is communicated with the sealing cavity (320).

2. The welding device for the high-voltage accumulator of the electric vehicle according to claim 1, further comprising a machine body (500), wherein a guide cylinder (300) is fixedly connected to the machine body (500), the guide cylinder (300) is vertically arranged, the first electrode (110) is located inside the guide cylinder (300), the upper end of the first electrode (110) is connected with the upper end of the guide cylinder (300) in a sliding manner in a vertical direction, and the first electrode (110) is located right above the second electrode (120); the sealed cavity (320) is formed by the space inside the guide cylinder (300), a gap (310) is formed between the outer wall of the lower end of the first electrode (110) and the inner wall of the guide cylinder (300), and the inflating device (200) is communicated with the gap (310).

3. The welding device for the high-voltage accumulator of the electric automobile according to claim 2, wherein a first driving device (610) is fixedly mounted on the machine body (500), and the first driving device (610) is in transmission connection with the first electrode (110).

4. The welding device of the high-pressure accumulator of the electric automobile according to claim 3, wherein the gas charging device (200) comprises a gas storage tank (210), a gas charging pipe (220) and a gas discharging pipe (230), one end of the gas charging pipe (220) is communicated with the gas storage tank (210), the other end of the gas charging pipe (220) is communicated with the sealed cavity (320), the gas discharging pipe (230) is communicated with the gas charging pipe (220) at a position between the gas storage tank (210) and the sealed cavity (320), a throttle valve (240) is installed on the gas charging pipe (220), a pressure releasing valve (250) is installed on the gas discharging pipe (230), and the throttle valve (240) is located on one side of the gas discharging pipe (230) far away from the sealed cavity (320).

5. The welding device for the high-pressure accumulator of the electric automobile according to claim 4, wherein a profiling groove (330) is arranged on the lower end surface of the guide cylinder (300), the shape of the inner wall of the profiling groove (330) is the same as that of the surface of the area to be welded of the workpiece (400), the surface of the area to be welded of the workpiece (400) is an upward convex curved surface, the inner wall of the profiling groove (330) is an upward concave curved surface, and the inner wall of the profiling groove (330) can be tightly attached to the surface of the area to be welded of the workpiece (400).

6. The welding device for the high-pressure accumulator of the electric automobile according to claim 5, wherein a circle of first sealing groove (340) is formed in the inner wall of the profiling groove (330), and a first sealing ring (350) is fixedly connected in the first sealing groove (340).

7. The welding device for the high-pressure accumulator of the electric automobile according to claim 6, wherein a second driving device (620) is further installed on the machine body (500), the second driving device (620) is in transmission connection with the workpiece (400), and the second driving device (620) is used for driving the workpiece (400) to move in a vertical direction.

8. The welding device for the high-voltage energy accumulator of the electric automobile according to claim 7, wherein a clamping table (700) is fixedly connected to the machine body (500), the clamping table (700) is connected with the machine body (500) in a sliding mode in a vertical direction, the second driving device (620) is in transmission connection with the clamping table (700), and a fixing station (710) is arranged on the upper surface of the clamping table.

9. The welding device for the high-pressure accumulator of the electric automobile according to claim 8, wherein a second sealing groove (360) is formed in an inner side wall of an upper end of the guide cylinder (300), a second sealing ring (370) is fixedly connected in the second sealing groove (360), the second sealing ring (370) is in sealing sliding connection with an outer wall of the first electrode (110), and the gap (310) is located between the second sealing ring (370) and the sealing cavity (320).