CN219830219U

CN219830219U - Detection device for battery

Info

Publication number: CN219830219U
Application number: CN202320713978.7U
Authority: CN
Inventors: 王洪斌; 邓志奇; 葛仁杰; 阳波; 黄硕
Original assignee: Chongqing Fudi Battery Research Institute Co ltd
Current assignee: Chongqing Fudi Battery Research Institute Co ltd
Priority date: 2023-04-03
Filing date: 2023-04-03
Publication date: 2023-10-13
Anticipated expiration: 2033-04-03

Abstract

The utility model discloses a detection device for a battery, which comprises: a base; the shell is arranged on the base, a detection cavity is formed in the shell, and a plurality of batteries are accommodated in the detection cavity; and the gas injection device is provided with a gas injection port and is movably arranged on the base, and the gas injection device can be selectively moved to a position where the gas injection port is communicated with the battery and injects gas into the battery. The detection device for the battery, which is designed by the utility model, has a simple structure, the gas injection device can inject gas into the battery after moving to the gas injection port to be communicated with the liquid injection port of the battery, and helium detection of a plurality of batteries can be simultaneously carried out, so that the detection efficiency is high.

Description

Detection device for battery

Technical Field

The utility model relates to the field of batteries, in particular to a detection device for a battery.

Background

In the related art, a battery helium detection device is generally used for testing the tightness of a battery and a battery core in the battery production process, in the prior art, the battery helium detection device consists of a large number of structural members, the system is complex, a plurality of structural members of the helium detection device need to be operated when the battery helium is detected, the working speed of the helium detection device is low, the battery helium detection efficiency is low, the battery core is arranged in a placing cavity of the helium detection device, helium injection gun needs to inject helium into the battery core, the helium detection device can only perform the tightness test of a single battery core at a time, the detection efficiency is low, and the battery production and operation cost is high.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present utility model is to propose a detection device for a battery. The detection device for the battery, which is designed by the utility model, has a simple structure, the gas injection device can inject gas into the battery after moving to the gas injection port to be communicated with the liquid injection port of the battery, and helium detection of a plurality of batteries can be simultaneously carried out, so that the detection efficiency is high.

The detection device for a battery according to the present utility model includes: a base; the shell is arranged on the base, a detection cavity is formed in the shell, and a plurality of batteries are accommodated in the detection cavity; and the gas injection device is provided with a gas injection port and is movably arranged on the base, and the gas injection device can be selectively moved to a position where the gas injection port is communicated with the battery and injects gas into the battery.

The detection device for the battery is simple in structure, the gas injection device can inject gas into the battery after being moved to the gas injection port to be communicated with the battery liquid injection port, helium detection of a plurality of batteries can be performed simultaneously, the detection efficiency is high, and the working beat of the detection device is accelerated.

According to some embodiments of the utility model, the gas injection means is configured in a plurality of one-to-one correspondence with a plurality of batteries, each of the gas injection means being selectively movable to a position where the gas injection port communicates with the corresponding battery.

According to some embodiments of the utility model, the housing comprises: the first shell is provided with the detection cavity; and the second shell is suitable for being matched with the first shell and closing the opening of the detection cavity.

According to some embodiments of the utility model, the gas injection apparatus includes: the gas injection pipeline is internally provided with a gas medium and is movably arranged on the base, and one end of the gas injection pipeline is provided with the gas injection port; and the sealing ring is arranged around the gas injection port.

According to some embodiments of the utility model, the first housing and/or the second housing is/are selectively movable to an open mouth of the detection chamber in a first direction to be adapted to close or open the detection chamber, and the gas injection pipe is movable to the gas injection mouth in a second direction to be in communication with or disconnected from the battery, the first direction being orthogonal to the second direction.

According to some embodiments of the utility model, a first sealing surface surrounding the detection chamber is provided on an end of the first housing facing the second housing; the end part of the second shell, which faces the first shell, is provided with a second sealing surface surrounding the detection cavity; a seal is disposed on at least one of the first sealing surface and the second sealing surface.

According to some embodiments of the utility model, the first housing and/or the second housing are/is optionally close to each other in a first direction to close the open mouth of the detection chamber, the first housing and/or the second housing are/is formed with a communication mouth in the first direction, and the gas injection pipe is moved in the first direction and is/are optionally moved through the communication mouth to a position where the gas injection mouth communicates with the corresponding battery.

According to some embodiments of the utility model, the detection device for a battery further comprises: the wall surface of at least one part of the positioning block is abutted against the inner wall of the detection cavity, and the wall surface of at least one other part of the positioning block is abutted against the outer surface of the battery.

According to some embodiments of the utility model, the base is configured as a rail, and the housing is movably connected to the rail.

According to some embodiments of the utility model, the housing comprises: a first shell, wherein a first movable matching part is formed on the bottom surface of the first shell; the second movable fit part is arranged on the bottom surface of the first shell and is movably connected with the first movable fit part in the direction perpendicular to the extending direction of the track, and the second movable fit part is matched with the track.

According to some embodiments of the utility model, the first movable fit portion is formed with a limiting groove extending in a length direction, the second movable fit portion is accommodated in the limiting groove, and a width of the second movable fit portion is smaller than a width of the limiting groove.

According to some embodiments of the utility model, the second movable fitting part is provided with an adjusting member on both sides in the width direction.

In summary, the detection device for the battery has a simple structure, the gas injection device moves on the base to realize connection and separation of the gas injection port of the battery, and the gap between the gas injection port and the liquid injection port can be sealed by the sealing ring, so that helium is prevented from leaking to the detection cavity at the liquid injection port, the accuracy of detection of the tightness of the battery is ensured, the gap between the first shell and the second shell can be sealed by the sealing piece, the detection cavity is made to form a closed environment, the tightness of the detection cavity is ensured, the accuracy of detection of the tightness of the battery is ensured, the plurality of gas injection devices are in one-to-one correspondence with the plurality of batteries, the helium detection of the plurality of batteries can be simultaneously carried out, the detection efficiency is high, and the working beat of the detection device is accelerated.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a top view of a first housing according to an embodiment of the present utility model.

Fig. 2 is a first housing structure diagram according to an embodiment of the present utility model.

Fig. 3 is an overall configuration diagram of a detection apparatus according to an embodiment of the present utility model.

Fig. 4 is an enlarged view of fig. 3 at circle a.

Fig. 5 is a cross-sectional view of an air injection device according to an embodiment of the present utility model.

Fig. 6 is a battery structure diagram according to an embodiment of the present utility model.

Reference numerals:

a detection device 1;

a drive device connection part 11; a first housing 21; a shaft hole 211; a first movable fit portion 212; a second movable fitting portion 213; a second housing 22; a seal 23;

an air injection device 30; a gas-injection port 30a; an air injection pipe 31; a first seal ring 32; a second seal ring 33; a ring magnet 34;

a guide shaft 50; a positioning block 60; an adjusting member 70;

a battery 2; and a liquid injection port 2a.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; 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 present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the related art, a battery helium detection device is generally used for testing the tightness of a battery and a battery core in the battery production process, in the prior art, the battery helium detection device consists of a large number of structural members, the system is complex, a plurality of structural members of the helium detection device need to be operated when the battery helium is detected, the working speed of the helium detection device is low, the battery helium detection efficiency is low, the battery core is arranged in a placing cavity of the helium detection device, and a helium injection gun injects helium into the battery core.

The detection device 1 according to the present utility model is suitable for performing tightness detection of a battery 2 that is not filled with liquid, and the detection device 1 for a battery 2 according to an embodiment of the present utility model is described below with reference to fig. 1 to 6.

As shown in fig. 3, the detection device 1 for a battery 2 according to the present utility model includes: a base, a housing, and an air injection device 30. The shell is arranged on the base, a detection cavity is formed in the shell, and a plurality of batteries 2 are accommodated in the detection cavity; the gas injection device 30 is formed with a gas injection port 30a and is movably provided to the base, and the gas injection device 30 is selectively movable to a position where the gas injection port 30a communicates with the battery 2 and injects gas into the battery 2. Specifically, a medium cavity is formed inside the battery 2, the medium cavity is suitable for containing electrolyte, a liquid injection port 2a is formed at the end part of the battery 2, and the electrolyte can be injected into the medium cavity through the liquid injection port 2a, so that the situation of liquid leakage of the battery 2 after liquid injection into the medium cavity is avoided, and the battery 2 is required to be subjected to tightness test after production. In some embodiments, a detection device 1 used for performing battery helium detection in a battery helium detection system is provided with a detection cavity, a plurality of detected batteries 2 are arranged in the detection cavity, gas in the detection cavity is pumped out, gas in a medium cavity of the detected batteries 2 is pumped out at the moment, a gas injection port 30a of the gas injection device 30 is communicated with a liquid injection port 2a of the batteries 2, so that the gas injection device 30 injects gas only into the medium cavity, the gas injection device 30 is used for filling helium with certain pressure into the medium cavity of each detected battery 2, the detection device 1 is connected with a helium mass spectrometer leak detector, if the detected battery 2 leaks, the helium leaked into the detection cavity can be detected through the helium mass spectrometer, and after the tightness test is finished, the helium in the medium cavity is recovered through a helium recovery device.

The detection device 1 for the battery 2 has a simple structure, the gas injection device 30 can inject gas into the battery 2 by moving to the gas injection port 30a to be communicated with the battery liquid injection port 2a, helium detection of a plurality of batteries 2 can be simultaneously carried out, the detection efficiency is high, and the working beat of the detection device 1 is accelerated.

According to some embodiments of the present utility model, as shown in fig. 3, the gas injection device 30 is configured to be plural in one-to-one correspondence to plural batteries 2, each gas injection device 30 is selectively movable to a position where the gas injection port 30a communicates with the corresponding battery liquid injection port 2a, so as to achieve gas injection of the battery 2, and the gas injection device 30 is movable on the base to achieve connection and disconnection of the battery liquid injection port 2a, so that the operation is simple, and helium inspection of plural batteries 2 can be performed simultaneously, and the inspection efficiency is high.

According to some embodiments of the present utility model, as shown in fig. 3, the housing includes a first housing 21 and a second housing 22. The first housing 21 is formed with a detection chamber; the second housing 22 is adapted to cooperate with the first housing 21 and close the open mouth of the detection chamber. Specifically, when the first casing 21 and the second casing 22 are in a split state, the detection cavity is opened, so that the battery 2 is conveniently arranged in the detection cavity, and after the first casing 21 and the second casing 22 are matched, the detection cavity is closed, so that the air suction work of the detection cavity and the air injection work of the medium cavity of the battery 2 can be conveniently performed.

In some embodiments, as shown in fig. 6, the battery 2 is configured in an elongated shape, and the battery 2 has a length dimension, a width dimension, and a height dimension, wherein the width dimension is the smallest. Annotate liquid mouth 2a and lie in battery 2 in the ascending one end of length direction, detect the chamber and have length direction equally, width direction and height direction, the length direction of battery 2 is unanimous with the length direction who detects the chamber, the width direction of battery 2 is also unanimous with the width direction who detects the chamber, and a plurality of batteries 2 arrange in proper order along the width direction who detects the chamber, make the battery 2 quantity that detects the intracavity and maximize, carry out the arrangement of a plurality of batteries 2 with the width direction of battery 2 simultaneously, the clamping loading and unloading of battery 2 is carried out to the easier anchor clamps, the anchor clamps transport battery 2 of being convenient for. The liquid injection ports 2a of the batteries 2 in the detection cavity face the same side, and the gas injection device 30 can move in the length direction of the batteries 2 to realize connection and separation with the liquid injection ports 2a of the batteries, so that the operation is simpler and more convenient.

According to some embodiments of the present utility model, as shown in fig. 5, the gas injection device 30 includes a gas injection pipe 31 and a seal ring. The gas medium flows in the gas injection pipeline 31 and is movably arranged on the base, and a gas injection port 30a is arranged at one end of the gas injection pipeline 31; the seal ring is circumferentially provided to the gas-injection port 30a. Specifically, in the battery helium detection system, the gas medium may be helium, the gas injection pipe 31 may be moved on the base to connect with and disconnect from the battery liquid injection port 2a, a sealing ring needs to be disposed at one end of the gas injection pipe 31 provided with the gas injection port 30a, and when the gas injection port 30a is communicated with the liquid injection port 2a, the sealing ring may seal a gap between the gas injection port 30a and the liquid injection port 2a, so as to avoid helium leaking to the detection cavity at the liquid injection port 2a, and ensure accuracy of tightness detection of the battery 2.

In some embodiments, as shown in fig. 5, a ring magnet 34 is provided inside the gas injection pipe 31 to perform a movement of extension and retraction using compressed air, thereby achieving connection and disconnection of the end of the gas injection pipe 31 provided with the gas injection port 30a with the battery gas injection port 2a.

According to some embodiments of the present utility model, as shown in fig. 3, the first housing 21 and/or the second housing 22 is selectively movable to the open mouth of the detection chamber in a first direction to be adapted to close or open the detection chamber, and the gas injection pipe 31 is movable to the gas injection port 30a to be connected to or disconnected from the battery 2 in a second direction, the first direction being orthogonal to the second direction. Specifically, at least one of the first housing 21 and the second housing 22 may move along a first direction on the base, and optionally open or close the detection chamber, the gas injection pipe 31 may move along a second direction on the base, the first direction is orthogonal to the second direction, and the second direction is consistent with the length direction of the battery 2, and the gas injection device 30 moves along the second direction, that is, the length direction of the battery 2, to achieve connection and disconnection with the battery liquid injection port 2a, so that the operation is simple.

According to some embodiments of the utility model, the end of the first housing 21 facing the second housing 22 is provided with a first sealing surface (not shown) surrounding the detection chamber; the end of the second housing 22 facing the first housing 21 is provided with a second sealing surface (not shown) surrounding the detection chamber; at least one of the first sealing surface and the second sealing surface is provided with a sealing piece 23, at least one of the first shell 21 and the second shell 22 moves on the base along the first direction to seal the detection cavity, after the detection cavity is sealed, the sealing piece 23 surrounding the detection cavity is respectively abutted against the first sealing surface and the second sealing surface and deforms so as to seal a gap between the first shell 21 and the second shell 22, so that the detection cavity forms a closed environment, the sealing degree of the detection cavity is ensured, and the accuracy of the tightness detection of the battery 2 is ensured.

In some embodiments, at least one of the first sealing surface and the second sealing surface is provided with a receiving groove (not shown) into which the seal 23 is embedded, preferably both the first sealing surface and the second sealing surface are provided with receiving grooves into which the seal 23 is embedded.

In some embodiments, as shown in fig. 5, the seal rings include a first seal ring 32 and a second seal ring 33. The end face of the gas injection pipeline 31, which is provided with the gas injection port 30a, is provided with a first groove, a first sealing ring 32 is embedded in the first groove, after the gas injection pipeline 31 extends out and is in contact with the surface of the battery 2, which is provided with the liquid injection port 2a, the first sealing ring 32 extrudes the surface of the battery 2, which is provided with the liquid injection port 2a, and a closed space is formed between the gas injection pipeline and a medium cavity of the battery 2, so that gas injected by the gas injection port 30a directly enters the medium cavity through the liquid injection port 2a, and helium is prevented from leaking to the detection cavity at the position of the liquid injection port 2 a; the gas injection pipeline 31 is close to the periphery wall of the gas injection port 30a and is provided with a second groove, a second sealing ring 33 is embedded in the second groove, at least one of the first shell 21 and the second shell 22 moves on the base along the first direction to seal the detection cavity, after the detection cavity is sealed, the sealing member 23 is respectively abutted against the first sealing surface and the second sealing surface and deforms, at the moment, the second sealing ring 33 of the gas injection pipeline 31 is positioned between the first sealing surface and the second sealing surface and abutted against the sealing member 23, the second sealing ring 33 and the sealing member 23 deform under the extrusion of the first sealing surface and the second sealing surface, the second sealing ring 33 and the sealing member 23 jointly seal a gap between the first shell 21 and the second shell 22, so that the detection cavity forms a closed environment, the external gas entering of the detection cavity in the communication process of the gas injection port 30a and the battery liquid injection port 2a is avoided, the sealing degree of the detection cavity and the safety of an operator are ensured, and the accuracy of the tightness detection of the battery 2 is ensured.

In some embodiments, the first seal ring 32, the second seal ring 33, and the seal 23 are each configured as rubber pads.

According to some embodiments of the present utility model, the first housing 21 and/or the second housing 22 are optionally adjacent to each other in the first direction to close the open port of the detection chamber, and the first housing 21 and/or the second housing 22 are formed with a communication port (not shown) in the first direction, and the gas injection pipe 31 is moved in the first direction and is optionally moved through the communication port to a position where the gas injection port 30a communicates with the corresponding battery 2. Specifically, at least one of the first housing 21 and the second housing 22 is movable on the base in the first direction to close the detection chamber, while the gas injection pipe 31 is movable on the base in the first direction and is movable through the communication port to the gas injection port 30a to communicate with the battery liquid injection port 2a, the movement direction of the gas injection pipe 31 being the same as the movement direction of the first housing 21 and/or the second housing 22.

In some embodiments of the utility model, the detection device 1 for the battery 2 further comprises a driving device (not shown). The drive means is adapted to drive the first housing 21 and/or the second housing 22 to move on the base, the drive means selectively driving at least one of the first housing 21 and the second housing 22 towards or away from each other to open or close the detection chamber.

In some embodiments, as shown in fig. 2-3, a driving device connecting part 11 is provided at the bottom of the first housing 21, and a driving device is connected to the driving device connecting part 11 to drive the first housing 21 to move.

In some embodiments, a first bottom plate is disposed at the bottom of the first housing 21, four pairs of lifting seats and corresponding lifting claws are fixedly connected to the lower end of the first bottom plate through bolts, the lifting seats and the corresponding lifting claws are the driving device connecting portions 11, the four pairs of lifting seats and the corresponding lifting claws are uniformly distributed below the first bottom plate in a rectangular structure, and are convenient to be connected with a lifting cylinder, and the lifting claws are disposed at the bottom of the first bottom plate, so that the first housing 21 is supported more safely and firmly in the lifting process.

In some embodiments of the utility model, as shown in fig. 1-4, the detection device 1 for the battery 2 further comprises a guide shaft 50. The first housing 21 and/or the second housing 22 is provided with a shaft hole 211, and the guide shaft 50 is engaged with the shaft hole 211. Specifically, in some embodiments, a linear bearing is disposed at the shaft hole 211, and the guide shaft 50 may be engaged with the linear bearing, and the guide shaft 50 is adapted to guide the movement of the first housing 21 and/or the second housing 22. In some embodiments, when the first housing 21 is lifted, the two pairs of linear bearings mounted on the first bottom plate and the guide shaft 50 can play a guiding role, so as to ensure that the lifting movement is flexible and free from clamping stagnation.

According to some embodiments of the present utility model, as shown in fig. 1-3, the detection device 1 for the battery 2 further comprises a positioning block 60. At least a part of the wall surface of the positioning block 60 is abutted against the inner wall of the detection cavity, and at least another part of the wall surface of the positioning block 60 is abutted against the outer surface of the battery 2. Specifically, the length direction of the battery 2 is consistent with the length direction of the detection cavity, and the replaceable positioning block 60 is arranged in the detection cavity due to different sizes of the batteries 2 of different types, so that the batteries 2 of different types can adapt to the length of the detection cavity, the application range of the detection device 1 is wider, and the detection device can be used for helium detection of batteries 2 of various types.

In some embodiments, the first housing 21 and the second housing 22 are made of stainless steel, and have high strength, high hardness, good welding performance and corrosion resistance.

In some embodiments, the positioning block 60 is made of a steel material, and the steel material is not conductive, is hard, has a low friction coefficient, and has strong plasticity, and can contact with the battery 2 itself without scratching the battery 2, so that the battery 2 itself is prevented from directly contacting the first housing 21 and the second housing 22 made of metal materials, thereby avoiding damage to the surface of the battery 2 and short circuit risk. The battery 2 and the positioning block 60 are placed in the detection cavity, the positioning of the battery 2 is accurate due to the tolerance limitation of the positioning block 60, the battery 2 is prevented from shaking in the process of matching the first shell 21 with the second shell 22, and the position deviation of the battery 2 is avoided.

According to some embodiments of the present utility model, the base is configured as a rail, and the rail is configured as a plurality of rails and extends in a first direction and a second direction, respectively, the housing is movably connected to the rail extending in the first direction to move in the first direction, and the gas injection device 30 is movably connected to the rail extending in the second direction to move in the second direction.

According to some embodiments of the present utility model, as shown in fig. 2-3, the housing includes a first housing 21 and a second movable mating portion 213. The bottom surface of the first housing 21 is formed with a first movable fitting portion 212; the second movable fitting portion 213 is disposed on the bottom surface of the first housing 21 and is movably connected to the first movable fitting portion 212 in a direction perpendicular to the extending direction of the rail, and the second movable fitting portion 213 is fitted to the rail. Specifically, in some embodiments, the first movable fit portion 212 is a first bottom plate, the first movable fit portion 212 carries the first housing 21, the second movable fit portion 213 is located on the bottom surface of the first housing 21, and the second movable fit portion 213 is movably connected to the first movable fit portion 212 in a direction perpendicular to the extending direction of the rail, so that the first housing 21 can adjust the position on the rail.

According to some embodiments of the present utility model, as shown in fig. 2-3, a limiting groove extending in a length direction is formed on the first movable matching portion 212, the second movable matching portion 213 is received in the limiting groove, and a width of the second movable matching portion 213 is smaller than a width of the limiting groove.

According to some embodiments of the present utility model, as shown in fig. 2 to 3, the first movable matching portion 212 is formed with a limiting groove, the second movable matching portion 213 is located in the limiting groove, and adjusting members 70 are disposed at two sides of the second movable matching portion 213 in the width direction, and by adjusting the adjusting members 70, a gap between the second movable matching portion 213 and a side wall of the limiting groove can be adjusted, errors generated in processing and assembling the whole first housing 21 can be absorbed, so that when the first housing 21 and the second housing 22 are lifted in place, the first housing 21 and the second housing 22 can be engaged, a closed environment is formed in the detection cavity, and the sealing degree of the detection cavity is ensured, thereby ensuring the accuracy of detecting the tightness of the battery. In some embodiments, the adjusting member 70 is configured as a spring positioning bead, and by adjusting the spring positioning bead, the gap between the second movable matching portion 213 and the side wall of the limiting groove can be adjusted, so that errors generated in processing and assembling the first housing 21 can be counteracted.

In summary, the detection device 1 for the battery 2 according to the present utility model has a simple structure, the gas injection device 30 moves on the base to connect and disconnect from the battery liquid injection port 2a, and by setting the seal ring to seal the gap between the gas injection port 30a and the liquid injection port 2a, helium is prevented from leaking to the detection cavity at the liquid injection port 2a, the accuracy of detecting the tightness of the battery 2 is ensured, and by setting the seal member 23 to seal the gap between the first housing 21 and the second housing 22, the detection cavity forms a closed environment, the tightness of the detection cavity is ensured, thereby ensuring the accuracy of detecting the tightness of the battery 2, and the plurality of gas injection devices 30 are in one-to-one correspondence with the plurality of batteries 2, so that helium detection of a plurality of batteries 2 can be performed simultaneously, the detection efficiency is high, and the working beat of the detection device 1 is accelerated.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

Although embodiments of the present utility model have been shown and described above, variations, modifications, substitutions and alterations are possible to the above embodiments.

Claims

1. A detection device for a battery, comprising:

a base;

the shell is arranged on the base, a detection cavity is formed in the shell, and a plurality of batteries (2) are accommodated in the detection cavity;

and the gas injection device (30) is provided with a gas injection port (30 a) and is movably arranged on the base, and the gas injection device (30) can be selectively moved to a position where the gas injection port (30 a) is communicated with the battery (2) and injects gas into the battery (2).

2. The detection apparatus for a battery according to claim 1, wherein the gas injection means (30) is configured in plural in one-to-one correspondence with plural batteries (2), each of the gas injection means (30) being selectively movable to a position where the gas injection port (30 a) communicates with the corresponding battery (2).

3. The detection device for a battery according to claim 1, wherein the housing includes:

a first housing (21), the first housing (21) having the detection chamber formed thereon;

-a second housing (22), said second housing (22) being adapted to cooperate with said first housing (21) and to close the open mouth of said detection chamber.

4. A detection device for a battery according to claim 3, characterized in that the gas injection device (30) comprises:

an air injection pipe (31), wherein a fluid medium in the air injection pipe (31) is movably arranged on the base, and one end of the air injection pipe (31) is provided with the air injection port (30 a);

and the sealing ring is arranged around the gas injection port (30 a).

5. The detection device for a battery according to claim 4, characterized in that the first housing (21) and/or the second housing (22) are/is selectively movable to an open mouth of the detection chamber in a first direction, which is orthogonal to the second direction, to be adapted to close or open the detection chamber, and the gas injection duct (31) is movable to a second direction, in which the gas injection mouth (30 a) is in communication with or disconnected from the battery (2).

6. The detection device for a battery according to claim 5, characterized in that a first sealing surface surrounding the detection chamber is provided on the end of the first housing (21) facing the second housing (22); the end of the second housing (22) facing the first housing (21) is provided with a second sealing surface surrounding the detection chamber; a seal (23) is provided on at least one of the first sealing surface and the second sealing surface.

7. The detection device for a battery according to claim 4, characterized in that the first housing (21) and/or the second housing (22) are/is optionally close to each other in a first direction to close the open mouth of the detection chamber, the first housing (21) and/or the second housing (22) are/is formed with a communication mouth in the first direction, and the gas injection pipe (31) is moved in the first direction and is/are optionally moved through the communication mouth to a position where the gas injection mouth (30 a) communicates with the corresponding battery (2).

8. The detection device for a battery according to claim 1, further comprising: the positioning block (60), at least part of the wall surface of the positioning block (60) is abutted against the inner wall of the detection cavity, and at least the other part of the wall surface of the positioning block (60) is abutted against the outer surface of the battery (2).

9. The detection device for a battery according to claim 1, wherein the base is configured as a rail, and the housing is movably connected to the rail.

10. The detection device for a battery according to claim 9, wherein the housing includes:

a first housing (21), wherein a first movable fit portion (212) is formed on the bottom surface of the first housing (21);

the second movable fit part (213) is arranged on the bottom surface of the first shell (21) and is movably connected with the first movable fit part (212) in a direction perpendicular to the extending direction of the track, and the second movable fit part (213) is matched with the track.

11. The battery detection device according to claim 10, wherein the first movable fitting portion (212) is formed with a limiting groove extending in a longitudinal direction, the second movable fitting portion (213) is accommodated in the limiting groove, and a width of the second movable fitting portion (213) is smaller than a width of the limiting groove.

12. The detection device for a battery according to claim 11, wherein the second movable fitting portion (213) is provided with an adjusting member (70) on both sides in the width direction.