CN221037844U - Air injection nozzle, seal detection device and battery seal detection system - Google Patents

Abstract

The application discloses an air injection nozzle, a seal detection device and a battery seal detection system. The gas injection nozzle includes: the body portion, body portion are formed with first terminal surface and second terminal surface, and first terminal surface is formed with the air inlet, and the second terminal surface is formed with the gas vent, and the inside of body portion is equipped with first inlet channel, air inlet and gas vent communicate with first inlet channel respectively, and the second terminal surface is formed with the multiturn arch of encircling the gas vent, along the marginal direction of gas vent to second terminal surface, whole protruding interval sets up, and is formed with the recess of encircling the gas vent between two adjacent archs. The multi-ring bulge of the gas injection nozzle can form a multi-sealing structure, and the probability of outward leakage of the detection gas can be blocked, so that the sealing performance of the gas injection nozzle can be improved, and the accuracy of a battery sealing test result can be improved.

Description

Air injection nozzle, seal detection device and battery seal detection system

Technical Field

The application relates to detection equipment, in particular to an air injection nozzle, a seal detection device and a battery seal detection system.

Background

When the battery is subjected to sealing performance detection, detection gas (such as helium) is required to be injected into the battery through the gas injection nozzle, and the gas injection nozzle is in sealing fit with an end cover of the battery.

Disclosure of utility model

In view of the above, the present application provides an air injection nozzle, a seal detection device and a battery seal detection system, which can solve the problem of poor sealing performance of the air injection nozzle.

In a first aspect, the present application provides a gas injection nozzle comprising:

The body portion, body portion are formed with first terminal surface and second terminal surface, and first terminal surface is formed with the air inlet, and the second terminal surface is formed with the gas vent, and the inside of body portion is equipped with first inlet channel, air inlet and gas vent communicate with first inlet channel respectively, and the second terminal surface is formed with the multiturn arch of encircling the gas vent, along the direction of gas vent to the edge of second terminal surface, whole protruding interval sets up, and is formed with the recess of encircling the gas vent between two adjacent circles of archs.

The gas injection nozzle can be through gas injection nozzle to the inside injection detection gas of battery in the use, and the gas detection gas can be helium, and when gas injection nozzle and the end cover sealing fit of battery, set up the multiturn arch at the second terminal surface of gas injection nozzle, multiturn arch can seal fit with the end cover of battery, and the detection gas can follow the radial outside leakage of gas vent from the inside arch, gets into in the recess between two adjacent circles of archs, and the protruding adjacent arch with the inside protruding can further block and detect the gas and leak outwards. Therefore, the multi-ring bulge can form a multi-sealing structure, and the probability of outward leakage of the detection gas can be blocked, so that the sealing performance of the gas injection nozzle can be improved, and the accuracy of a battery sealing test result can be improved.

In some embodiments, the outermost protrusions are spaced from the edge of the second end surface less than the outermost protrusions are spaced from the exhaust port. In the detection process, the battery shakes or the gas injection nozzle is inclined relative to the battery, gaps are easy to appear at the edges of the two opposite sides of the second end face, the distance between the outermost protrusions and the edges of the second end face is smaller than the distance between the outermost protrusions and the gas exhaust port, and when the battery shakes, the gaps can be reduced or eliminated, so that the tightness of the gas injection nozzle can be improved.

In some embodiments, the outer contour of the outermost lobe coincides with the edge of the second end face. Therefore, the outermost protrusion can seal the edge position of the second end face, so that the sealing performance of the air injection nozzle is further improved.

In some embodiments, the body portion includes a first portion and a second portion connected to the first portion, the first end surface is formed at an end of the first portion facing away from the second portion, the second end surface is formed at an end of the second portion facing away from the first portion, a dimension of the outer contour of the first portion along a first direction is L1, a dimension of the second portion along the first direction is L2, and the first direction is parallel to the second end surface, wherein L1 > L2.

When the gas injection nozzle is abutted against the end cover of the battery in the process of detecting gas injection of the battery, one side contour of the second part along the first direction faces the pole of the battery, compared with a structure that L1 is smaller than or equal to L2, the interval between the contour of the second part facing the pole part and the pole can be increased, so that the probability of interference between the second part and the pole of the battery is reduced as much as possible, and the sealing requirement of the liquid injection holes of the batteries with different specifications can be met.

In some embodiments, the outer contour of the second end surface has a dimension L3 along a second direction, the second direction being perpendicular to the first direction and parallel to the first end surface, wherein L3 > L2. Compared with a structure that L3 is smaller than or equal to L2, the area of the second end face can be increased, so that the sealing area is increased, the radial flow path of the detection gas along the exhaust port is longer, leakage is less likely to occur, and the sealing performance of the gas injection nozzle is further improved.

In some embodiments, the outer contour of the second portion is projected in an elliptical shape or an elongated slot shape on the second end surface, the length direction of the outer contour of the second portion is the same as the second direction, and the width direction of the outer contour of the second portion is the same as the first direction. Therefore, L3 is more than L2, and the projection of the outer contour of the second part on the second end face is elliptical or long-groove-shaped, so that the manufacturing is convenient.

In some embodiments, the plurality of lobes includes a rubber or silicone member. Compared with the multi-ring bulge which is a rigid piece, the multi-ring bulge is easier to compress and can recover deformation, so that the sealing performance of the multi-ring bulge is better.

In some embodiments, the heights of all of the protrusions are the same. Therefore, compared with the structure with different heights of the plurality of circles of bulges, all the bulges can be tightly attached to the end cover of the battery, so that each circle of bulges can exert better sealing performance.

In a second aspect, the present application provides a seal detection device comprising: the shell, the cap, connecting rod and the gas injection mouth of first aspect, the surface of shell or the surface of cap be formed with the inside intercommunication of casing bleed hole, the one end of casing is formed with the opening, the cap lid is located the opening setting to but with the casing open and shut and be connected, the one end of connecting rod wears to establish to in the casing from the cap, and is connected with first terminal surface, the other end of connecting rod is located the outside of cap, the inside of connecting rod is formed with the second air inlet channel with first air inlet channel intercommunication.

In the sealing test process of the battery, the battery is placed in the shell, the shell cover is sealed at the opening position of the shell, the end cover of the battery at the second end face of the air injection nozzle is abutted against, so that the air outlet is communicated with the liquid injection port of the battery, the air in the shell is exhausted by vacuumizing the shell from the air exhaust hole, the air in the battery is exhausted through exhausting to the connecting rod, and then the detecting gas (such as helium) is injected into the battery through the connecting rod.

In some embodiments, the seal detection device further comprises a drive mechanism drivingly coupled to the housing for driving the housing relative to the housing cover in a depth direction of the opening to separate or sealingly engage the housing with the housing cover. From this, actuating mechanism can drive the casing and remove to can pack into the battery when casing and cap separation, when evacuating the casing, can support casing and cap each other, so that casing and cap keep sealed cooperation mutually, thereby can realize the quick loading into and take out of battery, in order to improve the efficiency of getting of putting of battery.

In some embodiments, the seal detection device further comprises a drive mechanism drivingly coupled to the cover for driving the cover relative to the housing in a depth direction of the opening to separate or sealingly engage the housing with the cover. From this, the removal of drive mechanism can drive the cap to can pack into the battery when casing and cap separation, when evacuating the casing, can support casing and cap each other, so that casing and cap keep sealed cooperation mutually, thereby can realize the quick loading into and take out of battery, in order to improve the efficiency of getting of putting of battery.

In some embodiments, the seal detecting device further includes an elastic member, through which the connecting rod is elastically connected to the cover, the elastic member being configured to provide an elastic force to the connecting rod in a direction from the air inlet to the air outlet. When the shell cover and the shell cover are covered after the battery is assembled, the gas injection nozzle is abutted against the end cover of the battery, the connecting rod moves axially when the gas injection nozzle is abutted against the end cover, and the elastic piece can provide elastic force for the gas injection nozzle so that the gas injection nozzle is in sealing fit with the end cover, and meanwhile, the buffer effect is achieved at the moment that the gas injection nozzle is abutted against the end cover.

In some embodiments, the seal detecting device further comprises a crimping member, the crimping member is formed with an abutting surface, the crimping member is connected with the housing cover, the outer surface of the connecting rod is formed with a limiting protrusion, the crimping member is arranged farther away from the housing cover relative to the limiting protrusion, the limiting protrusion is located outside the housing cover and abuts against the housing cover, one end of the elastic member abuts against the limiting protrusion, and the other end of the elastic member abuts against the abutting surface. Therefore, the acting force of the elastic piece acts between the connecting piece and the shell, the connecting rod axially moves when the gas injection nozzle abuts against the end cover, the elastic piece is compressed to provide elastic force for the gas injection nozzle, so that the gas injection nozzle is in sealing fit with the end cover, and meanwhile, the buffer effect is achieved at the moment that the gas injection nozzle abuts against the end cover.

In a third aspect, the application provides a battery seal detection system, comprising a battery and the seal detection device of the second aspect, wherein the battery is arranged in a shell, a liquid injection port of the battery is arranged towards a shell cover, and a protrusion is abutted against an end cover of the battery and is arranged around the liquid injection port.

Since the battery seal detection system includes all the technical features of the seal detection device of the second aspect, the effects are the same as those described above, and will not be described in detail herein.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is an isometric view of a gas injection nozzle according to some embodiments of the present application;

FIG. 2 is a cross-sectional view B-B of FIG. 1;

FIG. 3 is a bottom view of a gas injection nozzle according to some embodiments of the application;

FIG. 4 is an isometric view of an air nozzle abutting a battery in accordance with some embodiments of the present application;

FIG. 5 is an isometric view of a seal-testing device according to some embodiments of the present application;

FIG. 6 is a front view of a seal-testing device according to some embodiments of the present application;

Fig. 7 is a cross-sectional view A-A of fig. 6.

Reference numerals in the specific embodiments are as follows:

100. An air injection nozzle; 10. a body portion; 11. a first portion; 111. a first end face; 112. an air inlet; 12. a second portion; 121. a second end face; 122. an exhaust port; 123. a protrusion; 13. a first air intake passage;

200. A housing;

300. A cover;

400. A base; 410. A guide post;

500. a connecting rod; 510. A limit protrusion; 520. A second intake passage;

600. An elastic member;

700. a crimp member;

800. a battery; 810. a pole;

900. a driving mechanism;

x, a first direction; y, second direction; z, depth direction.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

When the battery is subjected to sealing performance detection, detection gas (such as helium) is required to be injected into the battery through the gas injection nozzle, and the gas injection nozzle is in sealing fit with an end cover of the battery. Specifically, the gas injection nozzle is propped against the position of the liquid injection port of the battery, the end face of the gas injection nozzle, which is propped against the end cover of the battery, is smooth, the end face of the gas injection nozzle is difficult to be completely clung to the surface of the end cover of the battery, and the battery is easy to shake, so that the end face of the gas injection nozzle and the end cover of the battery are not tightly sealed, gas leakage is easy to occur, and the accuracy of a sealing test result is influenced (the battery is evaluated by detecting whether the gas leakage exists inside the battery when the battery is in a sealing test).

In view of this, the application provides a gas injection nozzle, and in the use process of the gas injection nozzle, the gas injection nozzle can inject detection gas into the battery, the detection gas can be helium, when the gas injection nozzle is in sealing fit with an end cover of the battery, a plurality of circles of bulges are arranged on the second end surface of the gas injection nozzle, the bulges can be in sealing fit with the end cover of the battery, the detection gas can leak outwards along the radial direction of a gas outlet from the innermost bulge and enter a groove between two adjacent circles of bulges, and the bulges adjacent to the innermost bulge can further block the leakage of the detection gas. Therefore, the multi-ring bulge can form a multi-sealing structure, and the probability of outward leakage of the detection gas can be blocked, so that the sealing performance of the gas injection nozzle can be improved, and the accuracy of a battery sealing test result can be improved.

The gas injection nozzle of the application, including but not limited to the tightness detection of batteries, can also be used for tightness detection of containers such as other cans or shells.

For convenience of description, referring to fig. 1-4, an air injection nozzle 100 according to some embodiments of the present application is described as an example.

The air injection nozzle 100 comprises a body 10, the body 10 is provided with a first end face 111 and a second end face 121, the first end face 111 is provided with an air inlet 112, the second end face 121 is provided with an air outlet 122, a first air inlet channel 13 is arranged in the body 10, the air inlet 112 and the air outlet 122 are respectively communicated with the first air inlet channel 13, the second end face 121 is provided with a plurality of circles of bulges 123 surrounding the air outlet 122, all the bulges 123 are arranged at intervals along the direction from the air outlet 122 to the edge of the second end face 121, and grooves surrounding the air outlet 122 are formed between two adjacent circles of bulges 123.

Alternatively, the gas injection nozzle 100 may be made of a material with good sealing performance, for example, the material of the gas injection nozzle 100 may be, but not limited to, rubber, silica gel, polyvinyl chloride, etc.

Alternatively, the exhaust port 122 may be, but is not limited to, a circular port, or a contoured port.

The outer contour of the second end surface 121 may be, but not limited to, a circular, square, etc., and may be specifically set according to the use requirement.

The edge direction along the exhaust port 122 to the second end surface 121 means a direction from inside to outside in which the exhaust port 122 is parallel to the second end surface 121.

In the use of the gas injection nozzle 100, detection gas (the detection gas can be helium or argon and other gases) can be injected into the battery 800 through the gas injection nozzle 100, when the gas injection nozzle 100 is in sealing fit with an end cover of the battery 800, a plurality of circles of protrusions 123 are arranged on the second end face 121 of the gas injection nozzle 100, the plurality of circles of protrusions 123 can be in sealing fit with the end cover of the battery 800, the detection gas can possibly leak outwards from the innermost protrusions 123 along the radial direction of the exhaust port 122, enter the grooves between the two adjacent protrusions 123, and the protrusions 123 adjacent to the innermost protrusions 123 can further block the detection gas from leaking outwards. Therefore, the multi-turn protrusion 123 may form a multi-seal structure that may block the probability of detecting gas leakage outward, thereby improving the tightness of the nozzle 100 to improve the accuracy of the sealing test results of the battery 800.

In some embodiments, referring to fig. 3, the distance between the outermost protrusion 123 and the edge of the second end surface 121 is smaller than the distance between the outermost protrusion 123 and the exhaust port 122.

The spacing of the outermost protrusions 123 from the edge of the second end face 121 is smaller than the spacing of the outermost protrusions 123 from the exhaust port 122: the distance between the same position of the outermost protrusion 123 and the edge of the second end surface 121 is smaller than the distance between the same position of the outermost protrusion 123 and the exhaust port 122.

The distance between the outermost protrusion 123 and the edge of the second end face 121 is H1 in the figure, the distance between the outermost protrusion 123 and the exhaust port 122 is H2 in the figure, and H1 and H2 satisfy: h1 is less than H2.

In the detection process, the battery 800 is easy to shake or the gas injection nozzle 100 is inclined relative to the battery 800, gaps are easy to appear at the edges of the two opposite sides of the second end face 121, the distance between the outermost protrusion 123 and the edge of the second end face 121 is smaller than the distance between the outermost protrusion 123 and the gas outlet 122, and the gaps can be reduced or eliminated, so that the tightness of the gas injection nozzle 100 can be improved.

In some embodiments, the outer contour of the outermost protrusion 123 coincides with the edge of the second end face 121. Thus, the outermost protrusion 123 may be configured to seal against the edge of the second end surface 121 to further enhance the sealing of the nozzle 100.

In some embodiments, referring to fig. 1-3, the body portion 10 includes a first portion 11 and a second portion 12 connected to the first portion 11, a first end surface 111 is formed at an end of the first portion 11 facing away from the second portion 12, a second end surface 121 is formed at an end of the second portion 12 facing away from the first portion 11, a dimension of an outer contour of the first portion 11 along a first direction X is L1, a dimension of the second portion 12 along the first direction X is L2, and the first direction X is parallel to the second end surface 121, wherein L1 > L2.

When the contour of the first portion 11 is circular, elliptical or other irregularly shaped, L2 is the largest dimension of the first portion 11 in the first direction.

When the profile of the second portion 12 is circular, elliptical or other irregularly shaped, L1 is the largest dimension of the second portion 12 in the first direction.

Alternatively, the first portion 11 and the second portion 12 may be integrally formed by injection molding.

In fig. 1 it is shown that the dimension of the second portion 12 in the first direction X is smaller than the dimension of the outer contour of the first portion 11 in the first direction X, the second portion 12 being formed with flat surfaces on both sides in the first direction X.

In the process of gas injection detection of the battery 800, when the gas injection nozzle 100 abuts against the end cover of the battery 800, the contour of one side of the second portion 12 along the first direction X faces the pole 810 of the battery 800, compared with a structure that L1 is less than or equal to L2, the interval between the contour of the portion of the second portion 12 facing the pole 810 and the pole 810 can be increased, so that the probability of interference between the second portion 12 and the pole 810 of the battery 800 is reduced as much as possible, and the sealing requirement of the liquid injection hole of the battery 800 with different specifications can be met.

In some embodiments, referring to fig. 3, the outer contour of the second end surface 121 has a dimension L3 along a second direction Y, which is perpendicular to the first direction X and parallel to the first end surface 111, wherein L3 > L2.

Compared with the structure in which L3 is less than or equal to L2, the area of the second end surface 121 can be increased to increase the sealing area, so that the flow path of the detection gas along the radial direction of the exhaust port is longer, leakage is less likely to occur, and the sealing performance of the gas injection nozzle 100 is further improved.

In some embodiments, referring to fig. 1 and 3, the outer contour of the second portion 12 is projected on the second end surface 121 to be elliptical or elongated slot, the length direction of the outer contour of the second portion 12 is the same as the second direction Y, and the width direction of the outer contour of the second portion 12 is the same as the first direction X.

The projection of the outer contour of the second portion 12 on the second end surface 121 into the shape of the long slot hole means that the projection of the outer contour of the second portion 12 on the second end surface 121 is the same as the shape of the edge contour of the long slot hole.

Fig. 3 shows a structure in which the outer contour of the second portion 12 is projected to the second end surface 121 into a long slot shape, that is, the outer contour of the second portion 12 includes two convex arcs and two straight lines, the two convex arcs are arranged at intervals along the second direction Y, the two straight lines are parallel to each other and are arranged at intervals along the first direction X, and two ends of the two convex arcs are respectively connected with two ends of the two straight lines. In other embodiments, the two convex arcs may be arc lines or elliptical lines, and the two convex arcs may be replaced by straight lines or other types of curves, and may be set according to actual requirements.

Therefore, L3 > L2 can be realized, and the projection of the outer contour of the second part 12 on the second end face 121 is elliptical or long-groove-shaped, so that the manufacturing is convenient.

In some embodiments, the multi-turn protrusion 123 comprises a rubber or silicone piece. The multi-turn protrusion 123 is more easily compressed and can recover deformation than the multi-turn protrusion 123 is a rigid member, so that the sealing performance of the multi-turn protrusion 123 can be improved.

In some embodiments, the heights of all of the protrusions 123 are the same.

The height of the protrusion 123 refers to the distance from the second end surface 121 to the end of the protrusion 123.

Thus, all of the protrusions 123 can be made closer to the end cap of the battery 800 than the structure in which the heights of the plurality of protrusions 123 are not equal, so that each protrusion 123 can exert superior sealability.

For convenience of explanation, referring to fig. 1 to 7, a seal detecting device according to some embodiments of the present application will be described.

The seal detection device comprises a shell 200, a shell cover 300, a connecting rod 500 and the air injection nozzle 100 of the first aspect, wherein an air extraction hole communicated with the interior of the shell 200 is formed on the outer surface of the shell 200 or the outer surface of the shell cover 300, an opening is formed at one end of the shell 200, the shell cover 300 is arranged on the opening, the shell cover 300 is connected with the shell 200 in an openable manner, one end of the connecting rod 500 penetrates into the shell 200 from the shell cover 300 and is connected with the first end face 111, the other end of the connecting rod 500 is positioned outside the shell cover 300, and a second air inlet channel 520 communicated with the first air inlet channel 13 is formed inside the connecting rod 500.

Illustratively, one end of the cover 300 is hinged with the housing 200, and the other end of the cover 300 is clamped or bolted with the housing 200.

The connecting rod 500 penetrates through the shell cover 300, and the connecting rod 500 and the shell cover 300 can be fixedly connected. Illustratively, the connection of the connecting rod 500 to the housing cover 300 may be a fixed connection, with the connecting rod 500 being hermetically welded to the housing cover 300. The connecting rod 500 is inserted into the housing 200 to a predetermined length, and after the cover 300 is connected with the housing 200, the gas injection nozzle 100 can be pressed against the end cover of the battery 800 and has a certain pressing force, and the gas outlet 122 of the gas injection nozzle 100 can be abutted with the liquid injection port of the end cover. For cells 800 of different heights, gaskets may be added or subtracted from the bottom of housing 200, allowing gas injection nozzle 100 to press against the end cap surface of cell 800.

The connection of the connecting rod 500 to the first end surface 111 includes, but is not limited to, adhesive bonding or integral molding.

Optionally, the end of the connecting rod 500 outside the cover 300 is connected with a vacuum line and a line for injecting a detection gas.

In the sealing test process of the battery 800, the battery 800 is firstly placed in the housing 200, the housing cover 300 is sealed at the opening position of the housing 200, the end cover of the battery 800 is abutted against the second end face 121 of the gas injection nozzle 100, so that the gas exhaust port 122 is communicated with the gas injection port of the battery 800, the housing 200 is vacuumized from the gas exhaust hole to exhaust the air in the housing 200, the connecting rod 500 is used for exhausting the air in the battery 800, and then the connecting rod 500 is used for injecting detection gas (such as helium) into the battery 800.

In some embodiments, referring to fig. 5 and 6, the seal detection device further includes a driving mechanism 900, where the driving mechanism 900 is in driving connection with the housing 200, and is used to drive the housing 200 to move along the depth direction Z of the opening relative to the housing cover 300, so as to separate or seal the housing 200 from or cooperate with the housing cover 300.

The seal detecting device further includes a base 400, the driving mechanism 900 is disposed on the base 400, the housing 200 is slidably connected with the base 400, specifically, optionally, the base 400 is provided with a guide post 410, the housing 200 is provided with a guide hole, the guide post 410 is penetrating through the guide hole and is slidably connected with the guide hole, the housing cover 300 is connected with the guide post 410, specifically, optionally, the housing cover 300 is connected with an end of the guide post 410 through a screw, or may be welded, and a movable end of the driving mechanism 900 is connected with a bottom of the housing 200. The outer surface of the connecting rod 500 is slidably engaged with the cover 300 and sealed therebetween by a sealing ring.

The drive mechanism 900 includes, but is not limited to, a linear motion member such as a cylinder, an electric push rod, or a hydraulic push rod.

Therefore, the driving mechanism 900 can drive the housing 200 to move, so that the battery 800 can be installed when the housing 200 is separated from the housing cover 300, and when the housing 200 is vacuumized, the housing 200 and the housing cover 300 can be abutted against each other, so that the housing 200 and the housing cover 300 are kept in sealing fit, and the battery 800 can be quickly installed and removed, so that the taking and placing efficiency of the battery 800 is improved.

In some embodiments, the seal detection device further includes a drive mechanism 900 in driving connection with the cover 300 for driving the cover 300 to move relative to the housing 200 in the depth direction Z of the opening to separate or sealingly engage the housing 200 with the cover 300.

Illustratively, the top of the cover 300 is coupled to the movable end of the drive mechanism 900, and the drive mechanism 900 drives the cover 300 to move in the depth direction Z of the opening.

Therefore, the driving mechanism 900 can drive the movement of the cover 300 to load the battery 800 when the housing 200 is separated from the cover 300, and can abut against the housing 200 and the cover 300 when the housing 200 is vacuumized, so that the housing 200 and the cover 300 are in sealing fit, thereby realizing rapid loading and unloading of the battery 800 and improving the loading and unloading efficiency of the battery 800.

In some embodiments, referring to fig. 6 and 7, the seal detecting device further includes an elastic member 600, the connecting rod 500 is elastically connected to the housing cover 300 through the elastic member 600, and the elastic member 600 is used for providing an elastic force to the connecting rod 500 along the direction from the air inlet 112 to the air outlet 122.

Alternatively, the elastic member 600 includes, but is not limited to, a spring or an elastic laminate or the like.

When the housing cover 300 and the housing 200 are covered after the battery 800 is assembled, the gas injection nozzle 100 abuts against the end cover of the battery 800, the connecting rod 500 is axially moved when the gas injection nozzle 100 abuts against the end cover, and the elastic piece 600 can provide elastic force for the gas injection nozzle 100 so that the gas injection nozzle 100 and the end cover keep in sealing fit, and meanwhile, the buffer function is played at the moment when the gas injection nozzle 100 abuts against the end cover.

In some embodiments, referring to fig. 6 and 7, the seal detecting device further includes a pressing member 700, the pressing member 700 is formed with an abutment surface, the pressing member 700 is connected with the housing cover 300, a limit protrusion 510 is formed on an outer surface of the connecting rod 500, the pressing member 700 is disposed further away from the housing cover 300 than the limit protrusion 510, the limit protrusion 510 is located outside the housing cover 300 and abuts against the housing cover 300, one end of the elastic member 600 abuts against the limit protrusion 510, and the other end of the elastic member 600 abuts against the abutment surface.

Illustratively, the crimp member 700 has an accommodating cavity formed therein, two ends of the crimp member 700 facing the housing cover 300 are provided with insertion holes penetrating the accommodating cavity, the elastic member 600 is a compression spring, the compression spring is sleeved on the connecting rod 500 and abuts against the limiting protrusion 510 of the connecting rod 500, and one end of the connecting rod 500 located outside the housing cover 300 can pass through the crimp member 700 for accessing an external pipeline.

Thus, the force of the elastic member 600 acts between the connector and the housing 200, and the connecting rod 500 moves axially when the nozzle 100 abuts against the end cap, and the elastic member 600 is compressed to provide elastic force to the nozzle 100, so that the nozzle 100 and the end cap are kept in sealing engagement, and at the same time, the buffering effect is achieved at the moment when the nozzle 100 abuts against the end cap.

For convenience of description, the following examples will take a battery seal detection system according to some embodiments of the present application as an example.

The battery seal detection system includes the battery 800 and the seal detection device of the above embodiment, the battery 800 is disposed in the housing 200, the liquid filling port of the battery 800 is disposed towards the housing cover 300, and the protrusion 123 abuts against the end cover of the battery 800 and is disposed around the liquid filling port.

The battery 800 may be, but is not limited to, a prismatic battery 800 or a cylindrical battery 800.

Since the battery seal detection system includes all the technical features of the seal detection device of the second aspect, the effects are the same as those described above, and will not be described in detail herein.

In an alternative embodiment of the air injection nozzle 100, referring to fig. 1-4, the air injection nozzle 100 includes a body portion 10, the body portion 10 includes a first portion 11 and a second portion 12 connected to the first portion 11, a first end face 111 is formed at an end of the first portion 11 facing away from the second portion 12, a second end face 121 is formed at an end of the second portion 12 facing away from the first portion 11, the first portion 11 and the second portion 12 are integrally formed, the first end face 111 is formed with an air inlet 112, the second end face 121 is formed with an air outlet 122, a first air inlet channel 13 is provided in the body portion 10, the air inlet 112 and the air outlet 122 are respectively communicated with the first air inlet channel 13, three circles of protrusions 123 surrounding the air outlet 122 are formed on the second end face 121, all the protrusions 123 are arranged at intervals along an edge direction from the air outlet 122 to the second end face 121, a groove surrounding the air outlet 122 is formed between two adjacent circles of protrusions 123, an outer contour of the outermost protrusion 123 coincides with an edge of the second end face 121, and the heights of all the protrusions 123 are identical. The outer contour of the first portion 11 has a dimension L1 in the first direction X and the second portion 12 has a dimension L2 in the first direction X, the first direction X being parallel to the second end face 121, wherein L1 > L2. The projection of the outer contour of the second portion 12 on the second end surface 121 is in a long groove shape, the length direction of the outer contour of the second portion 12 is the same as the second direction Y, and the width direction of the outer contour of the second portion 12 is the same as the first direction X.

Through the setting of many rings of protruding 123, can make gas injection nozzle 100 have multiple sealed effect to reduce the gas injection nozzle 100 and seal the poor and probability that appears detecting gas leakage of leakproofness in the seal detection process. And the profile of the second portion 12 is projected as a long slot shape on the second end surface 121, when the gas injection nozzle 100 abuts against the end cover of the battery 800, the profile of one side of the second portion 12 along the first direction X is directed towards the pole 810 of the battery 800, so that the distance between the profile of the portion of the second portion 12 directed towards the pole 810 and the pole 810 can be increased, the probability of interference with the pole 810 of the battery 800 can be reduced as much as possible, and the sealing requirements of the liquid injection holes of the batteries 800 with different specifications can be met. Compared with the structure that L3 is smaller than or equal to L2, the area of the second end face 121 can be increased to increase the sealing area, so that the radial flow path of the detection gas along the exhaust port is longer, leakage is less likely to occur, and the sealing performance of the gas injection nozzle 100 is further improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (14)

1. A gas injection nozzle, comprising:

The body portion, body portion is formed with first terminal surface and second terminal surface, first terminal surface is formed with the air inlet, the second terminal surface is formed with the gas vent, the inside of body portion is equipped with first inlet channel, the air inlet with the gas vent respectively with first inlet channel intercommunication, the second terminal surface is formed with around the multiturn arch of gas vent, follows the direction of gas vent to the edge of second terminal surface, all protruding interval sets up, and adjacent two circles be formed with between the arch around the recess of gas vent.

2. The nozzle of claim 1 wherein the outermost protrusion is spaced from the edge of the second end surface less than the outermost protrusion is spaced from the exhaust port.

3. The nozzle of claim 2 wherein the outer contour of the outermost lobe coincides with the edge of the second end face.

4. A nozzle according to any one of claims 1 to 3, wherein the body portion comprises a first portion and a second portion connected to the first portion, the first end face being formed at an end of the first portion facing away from the second portion, the second end face being formed at an end of the second portion facing away from the first portion, the first portion having an outer contour of dimension L1 in a first direction, the second portion having a dimension L2 in the first direction, the first direction being parallel to the second end face, wherein L1 > L2.

5. The nozzle of claim 4 wherein the outer contour of said second end surface has a dimension L3 in a second direction, said second direction being perpendicular to said first direction and parallel to said first end surface, wherein L3 > L2.

6. The nozzle of claim 5, wherein the second portion has an outer contour that is elliptical or elongated slot shaped in projection on the second end surface, the second portion having an outer contour that is the same in length as the second direction and an outer contour that is the same in width as the first direction.

7. A nozzle according to any one of claims 1 to 3, wherein the plurality of projections comprise rubber or silicone elements.

8. A nozzle according to any one of claims 1 to 3 wherein the height of all of the protrusions is the same.

9. A seal detection device, comprising: the air injection nozzle of any one of claims 1-7, wherein an air extraction hole communicated with the inside of the shell is formed on the outer surface of the shell or the outer surface of the shell, an opening is formed at one end of the shell, the shell cover is arranged on the opening and can be connected with the shell in an opening-closing manner, one end of the connecting rod penetrates from the shell cover to the inside of the shell and is connected with the first end face, the other end of the connecting rod is positioned outside the shell cover, and a second air inlet channel communicated with the first air inlet channel is formed inside the connecting rod.

10. The seal detection device of claim 9, further comprising a drive mechanism drivingly coupled to the housing for driving the housing relative to the housing cover in a depth direction of the opening to separate or sealingly engage the housing with the housing cover.

11. The seal detection device of claim 9, further comprising a drive mechanism drivingly coupled to the housing cover for driving the housing cover relative to the housing in a depth direction of the opening to separate or sealingly engage the housing with the housing cover.

12. The seal detecting apparatus according to claim 10 or 11, further comprising an elastic member by which the connection rod is elastically connected to the cover, the elastic member being configured to provide an elastic force to the connection rod in a direction from the air inlet port to the air outlet port.

13. The seal detecting device according to claim 12, further comprising a pressure-bonding member formed with an abutment surface, the pressure-bonding member being connected with the housing cover, the outer surface of the connecting rod being formed with a limit projection, the pressure-bonding member being disposed farther from the housing cover than the limit projection, the limit projection being located outside the housing cover and abutting against the housing cover, one end of the elastic member abutting against the limit projection, the other end of the elastic member abutting against the abutment surface.

14. A battery seal detection system, comprising a battery and the seal detection device of any one of claims 9-13, wherein the battery is disposed in the housing, a liquid filling port of the battery is disposed toward the housing cover, and the plurality of protrusions are disposed against and around an end cap of the battery.