CN218239216U

CN218239216U - Battery cover plate leak detection tool

Info

Publication number: CN218239216U
Application number: CN202220838783.0U
Authority: CN
Inventors: 张冲
Original assignee: Anhui Nuoyi Technology Co ltd
Current assignee: Anhui Nuoyi Technology Co ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2023-01-06
Anticipated expiration: 2032-04-12

Abstract

The utility model relates to the technical field of leak detection, in particular to a battery cover plate leak detection tool, which comprises a battery cover plate, wherein an inflation cover and a leak detection cover are respectively covered on two sides of the battery cover plate, an inflation cavity is formed between the inflation cover and the battery cover plate, and a sealed leak detection cavity is formed between the leak detection cover and the battery cover plate; the gas-filled cavity is respectively communicated with an inert gas inflator for conveying inert gas and a hydrogen-nitrogen inflator for conveying hydrogen-nitrogen gas, one side of the leakage detection cavity is communicated with the inert gas inflator for conveying inert gas and a hydrogen leakage detector, and the other side of the leakage detection cavity is communicated with a leakage detection cover exhaust valve for exhausting; the air inflation cover is provided with an upper heating plate, and the leakage detection cover is provided with a lower heating plate; the utility model discloses can discharge the influence of vapor, through the theory of operation of gas leakage, the condition of accurate detection battery apron leak reduces the detection cost of battery top cap simultaneously.

Description

Battery cover plate leak detection tool

Technical Field

The utility model relates to a technical field that the small opening detected specifically is a battery apron leak hunting frock.

Background

The battery cover plate is used as an important part of the power battery, and the air tightness of the battery cover plate is important for the safety of the battery and the safety of a whole vehicle.

Helium detection is a mature leak detection technology, has ultrahigh detection precision, and is widely applied to industries such as electric power, new energy, refrigeration, aviation and the like. However, the price of helium is too high, and particularly when large workpieces are detected, a large amount of helium is needed each time, and if a recovery system is added, a large investment is also needed. Moreover, the spontaneous combustion phenomenon of the battery cars and new energy cars on the market at present is endless, so that the sealing property of the battery needs to be ensured, and the leakage detection of the battery cover plate is more important; and a large blank exists for the leakage detection of the battery cover plate at present.

Because the existence of vapor in the air, it can produce hydrogen under the effect of ultraviolet ray, and the hydrogen of production can pass the leak and get into the hydrogen mass spectrometer, and vapor itself also can pass through the leak and get into the hydrogen mass spectrometer in addition, also can produce hydrogen ion under the ionization of the ion source of hydrogen mass spectrometer, has produced very big interference to the detection, therefore has waited for a long time to solve.

Disclosure of Invention

In order to avoid and overcome the technical problem who exists among the prior art, the utility model provides a battery cover plate leak hunting frock can discharge the influence of vapor, and through the theory of operation of gas leakage, the condition of accurate detection battery cover plate leak hunting reduces the detection cost of battery top cap simultaneously.

In order to achieve the above object, the utility model provides a following technical scheme:

a battery cover plate leakage detection tool comprises a battery cover plate, wherein an inflation cover and a leakage detection cover are respectively covered on two sides of the battery cover plate, an inflation cavity is formed between the inflation cover and the battery cover plate, and a sealed leakage detection cavity is formed between the leakage detection cover and the battery cover plate;

the gas-filled cavity is respectively communicated with an inert gas inflator for conveying inert gas and a hydrogen-nitrogen inflator for conveying hydrogen-nitrogen gas, one side of the leakage detection cavity is communicated with the inert gas inflator for conveying inert gas and a hydrogen leakage detector, and the other side of the leakage detection cavity is communicated with a leakage detection cover exhaust valve for exhausting;

aerify the cover and be provided with the hot plate, the leak hunting covers and is provided with down the hot plate.

As a further aspect of the present invention: the battery cover plate is characterized in that an inflation groove is formed in the inflation cover, a leakage detection groove is formed in the leakage detection cover, and the inflation groove and a notch of the leakage detection groove are attached to two sides of the battery cover plate in opposite directions.

As a further aspect of the present invention: the gas-filled cavity is communicated with a gas-filled cover inflation valve, the gas-filled cover inflation valve is communicated with the output end of the inert gas inflator, the gas-filled cavity is also communicated with a detection inflation valve, the detection inflation valve is communicated with the output end of the inert gas inflator, the leak detection cavity is communicated with a leak detection valve, and the leak detection valve is communicated with the input end of a hydrogen leak detector.

As a further aspect of the present invention: an upper sealing gasket is arranged between the notch of the inflation groove and the edge of the upper surface of the battery cover plate in a clamping mode, and a lower sealing gasket is arranged between the notch of the leakage detection groove and the edge of the lower surface of the battery cover plate in a clamping mode.

As the utility model discloses further scheme again: the improved air-leakage detection device is characterized in that the air inflation cover is in a cuboid shape, the air inflation groove is in a counter bore structure arranged on the air inflation cover, the leakage detection cover is in a cuboid shape, and the leakage detection groove is in a counter bore structure arranged on the leakage detection cover.

As the utility model discloses further scheme again: the shape of the notch of the inflation groove is the same as that of the leak detection groove.

As a further aspect of the present invention: the inflation cavity is also communicated with an inflation cover exhaust valve for exhausting.

As a further aspect of the present invention: go up the last draw-in groove of having seted up the U type along the board length direction on the hot plate, aerify the cover joint in last draw-in groove, set up the lower draw-in groove of U type along the board length direction on the hot plate down, leak hunting cover joint is in draw-in groove down.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a go up the lower shutter door at battery apron and set up sealed cavity, whether utilize the cracked principle of gas permeation to detect battery apron to have the crack, can be according to the accurate sealed condition of judgement battery apron of the result that detects. Through filling into high-purity inert gas to aerifing the cavity and leak hunting cavity inside, can be with the inside gas outgoing who originally exists of cavity, and then eliminate external environment to the influence of testing result, very big improvement the accuracy of testing result. Because inert gases such as a helium vessel, neon gas, argon gas and the like are used, the gases have stable chemical properties, do not react with the external environment and accord with the concept of green environmental protection.

2. The utility model discloses seal ring about using, elastic seal ring can make and aerify the cavity and leak the leak hunting cavity and be in encapsulated situation all the time at the in-process of leak hunting, avoids the emergence of gas leakage phenomenon, improves the accuracy of testing result.

3. The utility model discloses a plurality of valve structure have been used, such valve structure, the on off state of control pipeline that can be timely to and the size of accurate regulated flow, in order to satisfy different operating requirement.

4. The utility model discloses hot plate about using can heat aerifing cavity and leak hunting cavity to discharge steam wherein, reduce external environment's influence. And the upper heating plate and the lower heating plate are both set to be U-shaped, and can be clamped on the outer sides of the inflation cover and the leakage detection cover, so that the inflation cover and the leakage detection cover can be uniformly heated, water vapor is discharged to the greatest extent, and the accuracy of a detection result is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is the utility model discloses an aerify cover and leak hunting cover split structure sketch map.

1-battery cover plate 2-inflation cover 3-leakage detection cover 4-detection inflation valve 5-hydrogen nitrogen inflator

6-leak detection valve 7-hydrogen leak detector 8-inert gas inflator 9-inflation cover inflation valve

10-air charging valve of leakage detection cover 11-exhaust valve of leakage detection cover 12-exhaust valve of leakage detection cover

13-upper sealing gasket 14-lower sealing gasket 15-upper heating plate 16-lower heating plate

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1-2, in an embodiment of the present invention, a battery cover plate leak detection tool includes an inflatable cover 2. The inflatable cover 2 is cuboid, an inflatable groove is formed in the inflatable cover 2, and the inflatable groove is of a counter bore structure. With aerify the leak hunting cover 3 in addition that cover 2 cooperations were used, leak hunting cover 3 is the cuboid form to seted up the leak hunting recess on leak hunting cover 3, the leak hunting recess is the counter bore structure. The size of the opening of the inflation groove is the same as that of the leakage detection groove. The inflation groove and the leak detection groove are opposite to each other, and the inflation groove and the leak detection groove are covered together to form a sealed cavity. A battery cover plate 1 is clamped between the inflatable cover 2 and the leakage detection cover 3, and the upper plate surface of the battery cover plate 1 covers the inflatable groove to form an inflatable cavity; the lower plate surface of the battery cover plate 1 covers the leakage detection groove, and a leakage detection cavity is formed.

In the process of closing the lid, aerify the notch edge of recess and the edge laminating of face on the battery apron 1, the notch edge of leak hunting recess and the edge laminating of face under the battery apron 1 can make the notch of aerifing the recess and leak hunting recess just relative like this, ensure that detection range is clear and definite, the testing result is accurate.

In order to maintain a high level of tightness between the gas-filled cavity and the leak detection cavity, an upper sealing gasket 13 is arranged between the gas-filled cap 2 and the cell cover plate 1, and a lower sealing gasket 14 is arranged between the leak detection cap 3 and the cell cover plate 1.

The inflatable cover 2 is sequentially communicated with an inflatable cover inflation valve 9, a detection inflation valve 4 and an inflatable cover exhaust valve 12. The other end of the inflation valve 9 of the inflation cover is communicated with an inert gas inflator 8, the inert gas inflator 8 sends high-purity inert gas into the inflation cover 2 through the inflation valve 9 of the inflation cover, and then other gas in the inflation cover 2 is expelled out of the inflation cover 2. The inert gas may be helium, neon, argon, and the like. The other end of the detection inflation valve 4 is communicated with a hydrogen-nitrogen inflator 5.

The inflatable cover 2 is tightly covered on the battery cover plate 1 all the time, the exhaust valve 12 of the inflatable cover is opened, at the moment, gas is exhausted by the exhaust valve 12 of the inflatable cover, and then the exhaust valve 12 of the inflatable cover is closed, so that the inflatable cavity is kept in a sealed state.

When only high-purity inert gas exists in the inflation cover 2, the detection inflation valve 4 is opened at the moment, and the hydrogen-nitrogen inflator 5 sends the hydrogen-nitrogen mixed gas into the inflation cavity.

The leakage detection cover 3 is sequentially communicated with a leakage detection cover inflation valve 10, a leakage detection valve 6 and a leakage detection cover exhaust valve 11. The other end of the inflation valve 10 of the leakage detection cover is communicated with an inert gas inflator 8, the inert gas inflator 8 sends high-purity inert gas into the leakage detection cover 3 through the inflation valve 10 of the leakage detection cover, and then other gas in the leakage detection cover 3 is expelled out of the leakage detection cover 3. The other end of the leak detection valve 6 is communicated with a hydrogen leak detector 7.

Leak hunting cover 3 closely covers all the time and closes on battery apron 1, opens leak hunting cover discharge valve 11, and gas is discharged by leak hunting cover discharge valve 11 this moment, later closes leak hunting cover discharge valve 11 again, makes the leak hunting cavity keep encapsulated situation.

The inflatable shield 2 is provided with an upper heating plate 15, a U-shaped upper clamping groove is formed in the upper heating plate 15 along the plate length direction, and the inflatable shield 2 is clamped in the upper clamping groove. Be provided with down hot plate 16 on the leak detection cover 3, set up the lower draw-in groove of U type along the board length direction on the hot plate 16 down, leak detection cover 3 joint is in draw-in groove down.

The hydrogen leak detector 7 is a hydrogen mass spectrometer, or a mass spectrometer capable of detecting hydrogen. The communication between the valves, the inflators, the cavity and the leak detector is made with plastic tubing. In order to avoid an excessively messy line, three plastic tubes connected to the gas-filled hood 2 are then wrapped inside a large plastic tube, as are three plastic tubes connected to the leak detection hood 3.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be covered by the present invention in the technical scope of the present invention, and the technical solution and the inventive concept of the present invention should be replaced or changed equivalently.

Claims

1. The battery cover plate leakage detection tool is characterized by comprising a battery cover plate (1), wherein an inflation cover (2) and a leakage detection cover (3) are respectively covered on two sides of the battery cover plate (1), an inflation cavity is formed between the inflation cover (2) and the battery cover plate (1), and a sealed leakage detection cavity is formed between the leakage detection cover (3) and the battery cover plate (1);

the gas-filled cavity is respectively communicated with an inert gas inflator (8) for conveying inert gas and a hydrogen-nitrogen inflator (5) for conveying hydrogen-nitrogen mixed gas, one side of the leakage detection cavity is communicated with the inert gas inflator (8) for conveying inert gas and a hydrogen leakage detector (7), and the other side of the leakage detection cavity is communicated with a leakage detection cover exhaust valve (11) for exhausting;

an upper heating plate (15) is arranged on the air inflation cover (2), and a lower heating plate (16) is arranged on the leakage detection cover (3).

2. The battery cover plate leakage detection tool according to claim 1, wherein an inflation groove is formed in the inflation cover (2), a leakage detection groove is formed in the leakage detection cover (3), and the inflation groove and a notch of the leakage detection groove are attached to the battery cover plate (1) in an opposite manner.

3. The battery cover plate leakage detection tool according to claim 2, wherein the inflation cavity is communicated with an inflation cover inflation valve (9), the inflation cover inflation valve (9) is communicated with the output end of the inert gas inflator (8), the inflation cavity is further communicated with a detection inflation valve (4), the detection inflation valve (4) is communicated with the output end of the inert gas inflator (8), the leakage detection cavity is communicated with a leakage detection valve (6), and the leakage detection valve (6) is communicated with the input end of a hydrogen leakage detector (7).

4. The tooling for detecting the leakage of the battery cover plate according to claim 2 or 3, characterized in that an upper sealing gasket (13) is arranged between the notch of the inflation groove and the upper surface of the battery cover plate (1), and a lower sealing gasket (14) is arranged between the notch of the leakage detection groove and the lower surface of the battery cover plate (1).

5. The battery cover plate leak detection tool according to claim 2, wherein the inflation cover (2) is rectangular, the inflation groove is a counter bore structure formed in the inflation cover (2), and the leak detection groove is a counter bore structure formed in the leak detection cover (3).

6. The battery cover plate leak detection tool according to claim 5, wherein the inflation cavity is further communicated with an inflation cover exhaust valve (12) for exhausting.

7. The battery cover plate leakage detection tool according to claim 4, wherein a U-shaped upper clamping groove is formed in the upper heating plate (15) along the plate length direction, the inflatable cover (2) is clamped in the upper clamping groove, a U-shaped lower clamping groove is formed in the lower heating plate (16) along the plate length direction, and the leakage detection cover (3) is clamped in the lower clamping groove.