CN117148450B

CN117148450B - Liquid injection hole detection tool, detection equipment and detection method

Info

Publication number: CN117148450B
Application number: CN202311414018.1A
Authority: CN
Inventors: 吴凯; 汤云凯
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-10-30
Filing date: 2023-10-30
Publication date: 2024-04-02
Anticipated expiration: 2043-10-30
Also published as: CN117148450A

Abstract

The invention discloses a liquid injection hole detection tool, detection equipment and a detection method, and relates to the technical field of battery detection. The liquid injection hole detection tool comprises a shell, a probe and a switch isolator. The probe is arranged on the shell and can move relative to the shell; the probe has a first state of being disengaged from the housing and a second state of being in abutment with the housing. The switch isolator is used for sensing the state of the probe, and when the probe is in the second state, the shell, the probe and the switch isolator are connected in series to form a closed electric loop. According to the technical scheme, according to the assembled state of the lower plastic part, the probe is in a first state separated from the shell and a second state abutted against the shell, so that after the switch isolator senses the state of the probe, whether the lower plastic part is reversely assembled is judged. Therefore, the liquid injection hole detection tool can detect whether the lower plastic part of the battery is filled or not to cause the liquid injection hole to be blocked, and defective products can be selected in advance to improve the yield of battery products.

Description

Liquid injection hole detection tool, detection equipment and detection method

Technical Field

The invention relates to the technical field of battery detection, in particular to a liquid injection hole detection tool, detection equipment using the liquid injection hole detection tool and a detection method based on the detection equipment.

Background

Along with the development of technology, the application range of the power battery is wider and wider. The power battery generally comprises a shell and a top cover connected with the shell, and a lower plastic part is connected below the top cover. The top cover is provided with a liquid injection hole for injecting electrolyte into the shell, and the lower plastic part is arranged in a liquid through hole communicated with the liquid injection hole. However, in actual operation, the lower plastic part and the top cover are easy to reversely assemble in the left-right direction, so that other parts of the lower plastic part can shield the liquid injection hole, the reject ratio of products is increased, and meanwhile, the trouble is brought to the subsequent injection of electrolyte.

Disclosure of Invention

The invention mainly aims to provide a liquid injection hole detection tool which aims to detect whether a lower plastic part is filled or not to cause the liquid injection hole to be blocked, so that the problem of high defective rate of battery products is solved.

In order to achieve the above purpose, the liquid injection hole detection tool provided by the invention comprises a shell, a probe and a switch isolator. The probe is arranged on the shell and can move relative to the shell; the probe has a first state of being disengaged from the housing and a second state of being in abutment with the housing. The switch isolator is used for sensing the state of the probe, and when the probe is in the second state, the shell, the probe and the switch isolator are connected in series to form a closed electric loop.

According to the technical scheme, the probe is arranged on the shell and can move relative to the shell, so that the risk that the probe is interfered with the lower plastic part after extending into the liquid injection hole when the lower plastic part shields the liquid injection hole can be reduced. According to the assembled state of the lower plastic part, the probe can have a state of moving away from the lower plastic part relative to the shell after being propped by the lower plastic or a state of keeping the lower plastic part, namely, the probe has a first state separated from the shell and a second state propped against the shell, so that after the state of the probe is detected, whether the lower plastic part is reversely assembled can be judged. By arranging the switch isolator, when the probe is in the second state, the shell, the probe and the switch isolator can be connected in series to form a closed electric loop, and then it can be understood that when the probe is in the first state, the loop formed by the shell, the probe and the switch isolator is in an open state, so that whether the lower plastic part is reversely assembled or not can be judged according to the state that the electric loop is in the closed state or the open state, and further the liquid injection hole detection tool can detect whether the lower plastic part of the battery is reversely assembled or not, so that the liquid injection hole is blocked, and defective products can be selected in advance, and the yield of battery products is improved.

In one embodiment, the housing includes a housing body, a mounting groove is formed in the housing body, one end of the probe extends into the mounting groove and abuts against a bottom wall of the mounting groove, and the other end of the probe extends downward and extends out of the housing body. The arrangement is that the probe is in a first state separated from the shell when moving upwards, and when the probe is in the first state, the liquid injection hole can be judged to be in a blocking state, and the lower plastic part is in a reverse loading state. And, so set up, can reduce the probe and drop from the casing completely risk.

In one embodiment, the probe comprises a needle bar and a boss, wherein one end of the needle bar extends out of the shell body and is used for extending into a liquid injection hole of the battery. One side of the boss is connected with the other end of the needle rod, and the boss is positioned in the mounting groove and is abutted with the bottom wall of the mounting groove. By the arrangement, on one hand, the boss of the probe can be separated from the bottom wall of the mounting groove of the shell when the probe moves upwards, so that the effect that the probe is separated from the shell is realized; on the other hand, the probe can be abutted with the bottom wall of the mounting groove in a natural state, so that the risk of falling of the probe is reduced.

In an embodiment, annotate liquid hole detection frock still includes elastic telescoping mechanism, and elastic telescoping mechanism installs in the mounting groove to can stretch out and draw back from top to bottom in the mounting groove, elastic telescoping mechanism cover is located outside the needle bar, and with the top butt of boss. By the arrangement, on one hand, the probe has good guiding and buffering effects in the upward movement process of the probe, the risk of probe deviation is reduced, and then the accuracy and the sensitivity of whether the switch isolator senses the probe to be in contact with the shell can be improved. In addition, the setting so still makes the probe reset under the drive of elasticity telescopic machanism, reduces the condition that the manual work reset the probe.

In one embodiment, the top end of the mounting groove is provided with an opening, the shell further comprises a first insulating sleeve, and the first insulating sleeve is fixedly mounted at the opening; the top end of the elastic telescopic mechanism is connected with the first insulating sleeve. By the arrangement, the risk of short circuit between the elastic telescopic mechanism and the shell body can be reduced. In addition, so set up, can also provide stable support for elastic telescoping mechanism's concertina movement, reduce elastic telescoping mechanism and pop out the risk outside the mounting groove.

In an embodiment, the first insulating sleeve is provided with a limiting groove communicated with the mounting groove, and the top end of the elastic telescopic mechanism stretches into the limiting groove. So set up, then make the cell wall of spacing groove play better limiting displacement to elastic telescoping mechanism on the one hand, on the other hand still make the spacing groove play better guide effect to elastic telescoping mechanism's concertina movement in its depth direction, and then reduce the risk that the probe that is connected with elastic telescoping mechanism takes place the skew to this annotate the liquid hole and detect the detection precision of frock has been improved.

In one embodiment, the shell further comprises a second insulating sleeve, the bottom end of the shell body is further provided with a matching hole communicated with the mounting groove, and the second insulating sleeve is mounted in the matching hole; the probe penetrates the second insulating sleeve. So set up, then can make the probe not contact with the shell body to play better insulating effect between probe and shell body, reduce the risk of probe and shell body short circuit.

The invention also provides detection equipment, which comprises a driving device and a liquid injection hole detection tool, wherein the driving device is in transmission connection with the liquid injection hole detection tool so as to drive the liquid injection hole detection tool to move up and down. So set up, then drive arrangement can drive annotate liquid hole and detect the frock up-and-down motion to realize annotating the downthehole effect of annotating of notes that the probe in the liquid hole detection frock stretched into the top of battery and cover, and then detect and annotate whether the liquid hole is by the shutoff, thereby realize judging whether the effect of the reverse dress of plastic part down, reduced the probability that bad product flowed.

In an embodiment, the detection device is a pole short detection device. Through setting up this check out test set to utmost point post short circuit check out test set, then make annotate liquid hole detection frock and install in utmost point post short circuit check out test set, and then realize annotating the effect that liquid hole detection process and utmost point post short circuit detection process go on simultaneously to production test's efficiency has been improved. Meanwhile, as the liquid injection hole detection process is combined into the pole short circuit test process, the liquid injection hole detection post is not required to be increased. In addition, as each product needs to be subjected to the pole short circuit test procedure, after the liquid injection hole detection procedure is combined into the pole short circuit test procedure, each product can also be subjected to the detection procedure of whether the liquid injection hole is blocked or not, so that the condition of missing detection of the quality of the liquid injection hole is reduced, and the yield of the product is improved.

The invention also provides a detection method, which comprises the following steps:

the driving device drives the liquid injection hole detection tool to move downwards so that the probe extends into the liquid injection hole of the battery.

Detecting the state of the probe, and judging the state of a liquid injection hole of the battery according to the state of the probe; and judging the assembly state of the lower plastic part in the battery according to the state of the liquid injection hole of the battery.

According to the detection method, the liquid injection hole detection tool is driven to move downwards through the driving device, so that the probe can extend into the liquid injection hole; the probe is in an initial position state relative to the shell or in an upward movement state relative to the shell after extending into the liquid injection hole, and whether the liquid injection hole is in a unobstructed state or a blocking state is judged by detecting whether the probe is in the initial state or the upward movement state after extending into the liquid injection hole. According to the state of the liquid injection hole of the battery, whether the lower plastic part in the battery is reversely assembled or not can be judged, so that the detection efficiency is improved, and meanwhile, the risk of outflow of bad products is reduced through the detection method.

In one embodiment, the state of the probe is detected, and the state of the liquid injection hole of the battery is judged according to the state of the probe; and judging the assembly state of the lower plastic part in the battery according to the state of the liquid injection hole of the battery, wherein the step of judging the assembly state of the lower plastic part in the battery comprises the following steps:

When the detection probe is in the first state, judging that the liquid injection hole of the battery is in a blocking state;

and judging that the lower plastic part is in a reversely-mounted state according to the state that the liquid injection hole of the battery is blocked.

According to the technical scheme, the state of the liquid injection hole of the battery can be judged according to the state of the probe, and then whether the lower plastic part is reversely assembled or not is judged. When the probe is in the first state, the probe is separated from the shell, namely, the probe moves upwards, so that the liquid injection hole of the battery can be judged to be blocked, and the assembly state of the lower plastic part can be further judged to be in the reverse assembly state.

when the detection probe is in the second state, judging that the liquid injection hole of the battery is in a unobstructed state;

and judging that the lower plastic part is in a normal state according to the state that the liquid injection hole of the battery is in a smooth state.

According to the technical scheme, the state of the liquid injection hole of the battery can be judged according to the state of the probe, and then whether the lower plastic part is reversely assembled or not is judged. When the probe is in the second state, the probe is abutted with the shell, namely the probe does not move upwards, so that the liquid injection hole of the battery can be judged to be blocked, and the assembly state of the lower plastic part is further judged to be in the reverse assembly state.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural diagram of an embodiment of a liquid injection hole detection tool according to the present invention;

FIG. 2 is a flow chart of an embodiment of the detection method of the present invention;

FIG. 3 is a detailed flowchart of an embodiment of the detection method S20 according to the present invention;

fig. 4 is a detailed flowchart of another embodiment of the detection method S20 according to the present invention.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

Embodiments of the technical solutions 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 solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection 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 and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. 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 present 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 "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to 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 describing the embodiments of the present application and for simplifying the description, rather than indicating or implying 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 are to 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 the specific circumstances.

The batteries mentioned in the art can be classified into disposable batteries and rechargeable batteries according to whether they are rechargeable or not. The types of rechargeable batteries that are currently common are: lead acid batteries, nickel hydrogen batteries, and lithium ion batteries. The lithium ion battery is widely applied to pure electric vehicles and hybrid electric vehicles at present, and the capacity of the lithium ion battery used for the application is slightly lower, but the lithium ion battery has larger output and charging current, longer service life and higher cost.

The battery described in the embodiments of the present application refers to a rechargeable battery. Hereinafter, embodiments disclosed herein will be described mainly by taking lithium ion batteries as examples. It should be appreciated that the embodiments disclosed herein are applicable to any other suitable type of rechargeable battery. The batteries mentioned in the embodiments disclosed in this application may be used directly or indirectly in a suitable device to power the device.

Reference to a battery in embodiments of the present disclosure refers to a single physical module that includes one or more battery cells to provide a predetermined voltage and capacity. The battery cells are basic units in the battery, and can be generally divided into: cylindrical battery cells, cuboid battery cells and soft package battery cells. Hereinafter, it will be mainly developed around the rectangular parallelepiped battery cells. It should be understood that the embodiments described hereinafter are also applicable in certain respects to cylindrical battery cells or pouch battery cells.

The battery cell comprises a positive pole piece, a negative pole piece, electrolyte and a separation film. The lithium ion battery cell mainly relies on movement of lithium ions between the positive electrode sheet and the negative electrode sheet. The film structure of the three-layered material in the cylindrical battery cell is wound into a cylindrical shape of the electrode assembly, and the film structure is wound or stacked into an electrode assembly having a substantially rectangular parallelepiped shape in the rectangular battery cell.

In a typical cell structure, the cell includes a housing, an electrode assembly, and an electrolyte. An electrode assembly is received in the case of the battery cell, the electrode assembly including a positive electrode tab, a negative electrode tab, and a separator. The housing includes a shell and a top end cap. The housing includes a receiving cavity formed by a plurality of walls and an opening. A top end cap is disposed at the opening to close the receiving cavity. In addition to the electrode assembly, an electrolyte is contained in the containing chamber. The positive electrode sheet and the negative electrode sheet in the electrode assembly include tabs. In order to prevent the positive electrode tabs from being fused by a large current, the positive electrode tabs are stacked in a plurality. The tab is electrically connected with electrode terminals, which are located outside the battery cell, through a connection member, and the electrode terminals generally include a positive electrode terminal and a negative electrode terminal. For rectangular parallelepiped battery cells, electrode terminals are generally provided at the top end cap portion. A plurality of battery cells are connected in series and/or parallel via electrode terminals for use in various applications.

In order to be convenient for pour into electrolyte into in the casing, be equipped with the notes liquid hole on the top lid, in order to avoid top end cover and utmost point ear contact, still be equipped with insulating lower plastic part between top end cover and the utmost point ear, be equipped with on the lower plastic part and be used for with annotating the via hole of liquid hole intercommunication. When the worker is singly embedded and sleeved with the lower plastic part and the top end cover, the lower plastic part is easily reversely assembled in the left-right direction, and then the through hole of the lower plastic part and the liquid injection hole of the top end cover cannot be communicated, so that the liquid injection hole is blocked, and the effect of injecting liquid into the shell cannot be realized. Therefore, if no detection item is performed on whether the liquid injection hole is clear, the defective rate of the battery product increases.

The invention provides a liquid injection hole detection tool, which aims to solve the problem that liquid injection holes are blocked due to the fact that lower plastic parts are arranged, and the reject ratio of products is increased.

In the embodiment of the invention, as shown in fig. 1, the liquid injection hole detection tool includes a housing 100, a probe 200 and a switch isolator 400. The probe 200 is mounted to the housing 100 and is movable relative to the housing 100; the probe 200 has a first state of being separated from the housing 100 and a second state of being abutted against the housing 100. The switch isolator is used to sense the state of the probe 200, and when the probe 200 is in the second state, the housing 100, the probe 200 and the switch isolator 400 are connected in series to form a closed electrical circuit.

The housing 100 is used to mount the probe 200. The housing 100 may be made of metal or plastic. The housing 100 may include at least two parts that are separate, or the housing 100 may be an integrally formed structure.

The probe 200 is a needle-like structure that extends into the fill hole of the battery. The probe 200 is generally made of metal, so that the strength of the probe 200 can be improved. The needle diameter of the probe 200 may be adapted to the diameter of the fill port of the battery. For convenience of description, the length extension direction of the probe 200 is defined as the up-down direction, i.e., the up-down direction shown in fig. 1, and the probe 200 can move up and down with respect to the housing 100, so that the probe 200 can be slidably connected to the housing 100, or a cavity for the up-down movement of the probe 200 is provided in the housing 100. To provide the probe 200 with both a disengaged and an engaged state with the housing 100, in an embodiment, the probe 200 may be disengaged from the housing 100 when moving upward and the probe 200 may be engaged with the housing 100 when not moving. For example, in one example, the housing 100 is provided with a limiting plate, the probe 200 is slidably disposed on the limiting plate, and the side wall of the probe 200 may be convexly provided with a limiting ring, and the limiting ring abuts against the top surface of the limiting plate, so that when the probe 200 moves upwards, the limiting ring of the probe 200 and the limiting plate on the housing 100 are separated from each other; if the probe 200 does not move, the stop collar of the probe 200 abuts against the stop plate on the housing 100. Or a sliding cavity can be formed in the shell 100, one end of the probe 200 extends into the sliding cavity, a limiting ring is arranged at one end of the probe 200 extending into the sliding cavity, and when the probe 200 does not move, the probe 200 is abutted with the bottom wall of the sliding cavity. In the above example, if the lower plastic part is reversely assembled, the lower plastic part will cover the liquid injection hole, so that the probe 200 is supported by the lower plastic part after extending into the liquid injection hole, so that the probe 200 moves upward under the supporting force of the lower plastic part, and the probe 200 is in the first state separated from the housing 100. If the lower plastic part is not reversely assembled, the liquid injection hole is not blocked by the lower plastic part, so that the probe 200 is not propped by the lower plastic part after the probe 200 stretches into the liquid injection hole, the probe 200 does not move upwards, and the probe 200 is still in a second state of mutually propping against the shell 100. Of course, in the present invention, the probe 200 may be abutted against the housing 100 when moving upward, and the probe 200 may be separated from the housing 100 when not moving, and the arrangement is similar to the above structure, so long as the probe 200 can be abutted against the housing 100 when moving upward, and separated from the housing 100 when not moving.

The switch isolator 400 is a component for sensing the state of the probe 200 and transmitting a signal to the machine by judging the closed or open state of an electrical circuit formed by the probe 200 and the housing 100. The switch isolator 400 is an electrical device that can sense whether the probe 200 is electrically connected to the housing 100, and the switch isolator 400 can be used to transmit the signal to a machine and prompt whether the plastic part is reversely mounted according to the signal. The switching isolator 400 may be a two-in and two-out switching isolator 400, that is, having two input ports, one of which is electrically connected to the probe 200 through a signal line, and two output ports, the other of which is electrically connected to the housing body 110 through a signal line. The at least one input port is used for being connected with the machine, so that corresponding signals are output to the machine, and the machine can conveniently give corresponding prompt signals to a user.

The probe 200 has the first state and the second state, and the switch isolator 400 can be used for sensing whether the probe 200 is in the first state or the second state, so that the signal is sent to the prompting device of the machine according to the state of the probe 200 sensed by the switch isolator 400, and the prompting device makes a corresponding prompt according to the signal sent by the switch isolator 400. For example, based on the scheme that the probe 200 moves upwards to be separated from the housing 100 and located in the first state, when the electrical circuit formed by the switch isolator 400, the housing 100 and the probe 200 is in the open state, the switch isolator 400 senses that the probe 200 is in the first state, which indicates that the probe 200 is supported by the lower plastic part, so that it can be determined that the lower plastic part is reversely mounted. The switch isolator 400 can send the signal to a prompting device which makes a prompt that the liquid injection hole is not smooth, the assembly of the lower plastic part is reversed or the assembly is unqualified. If the switch isolator 400 detects that the electric loop formed by the switch isolator and the shell 100 and the probe 200 is in the closed state, and the switch isolator senses that the probe 200 is in the second state, the probe 200 is not supported by the lower plastic part, so that the state that the liquid injection hole is unobstructed can be judged, and the lower plastic part is in the normal assembly state. The switch isolator 400 can send the signal to a prompting device which prompts that the liquid injection hole is smooth, the lower plastic part is assembled normally or assembled qualified. Of course, in other examples, it may be set that the probe 200 abuts against the housing 100 when moving upward, and when the probe 200 is in the second state, the switch isolator 400 senses that the electrical circuit formed by the probe 200 and the housing 100 is in the closed state, and when the switch isolator 400 senses that the probe 200 is in the second state, the lower plastic part is proved to be reversely mounted. When the probe 200 is in contact with the shell 100, the switch isolator 400, the shell 100 and the probe 200 are connected in series to form an electric loop, so that the plastic part can be judged to be in a normal assembly state according to the closed state of the electric loop, and the scheme for detecting the state of the probe 200 by using the traditional photoelectric sensor can have higher sensitivity.

According to the technical scheme, the probe 200 is arranged on the shell 100 and can move up and down relative to the shell 100, so that the risk that the probe 200 is interfered with the lower plastic part after extending into the liquid injection hole when the lower plastic part shields the liquid injection hole can be reduced. According to the assembled state of the lower plastic part, the probe 200 has two states of ascending or keeping, namely, the probe 200 has a first state separated from the housing 100 and a second state abutting against the housing 100, so that after detecting the state of the probe 200, it can be determined whether the lower plastic part is reversely assembled. By arranging the switch isolator 400, and when the probe 200 is in the second state, the shell 100, the probe 200 and the switch isolator 400 can be connected in series to form a closed electric loop, it can be understood that when the probe 200 is in the first state, the loop formed by the shell 100, the probe 200 and the switch isolator 400 is in an open state, so that whether the lower plastic part is reversely assembled can be further judged according to the electric loop in the closed state or the open state, and further the liquid injection hole detection tool can detect whether the lower plastic part of the battery is reversely assembled to cause the state that the liquid injection hole is blocked, so that defective products can be selected in advance, and the yield of battery products is improved.

In one example, as shown in fig. 1, the housing 100 includes a housing body 110, in which a mounting groove 111 is formed in the housing body 110, one end of the probe 200 extends into the mounting groove 111 and abuts against a bottom wall of the mounting groove 111, and the other end of the probe 200 extends downward and protrudes out of the housing body 110.

The housing body 110 is a member for mounting the probe 200. The housing body 110 may be a plastic or metal piece.

The mounting groove 111 refers to a groove structure formed in the housing body 110 to accommodate at least one end of the probe 200, and also provides a movable space for the probe 200 to move up and down.

By extending one end of the probe 200 into the mounting groove 111 and abutting against the bottom wall of the mounting groove 111, the probe 200 has a first state separated from the housing 100 when moving upwards, and when the probe 200 is in the first state, it can be determined that the liquid injection hole is in a blocking state and the lower plastic part is in a reverse mounting state. Also, by doing so, the risk of the probe 200 falling completely from the housing 100 can be reduced.

As shown in fig. 1, in order to enable the end of the probe 200 extending into the mounting groove 111 to abut against the bottom wall of the mounting groove 111, the probe 200 includes a needle bar 210 and a boss 220, and one end of the needle bar 210 extends out of the housing body 110 and is used to extend into the liquid injection hole of the battery. One side of the boss 220 is connected to the other end of the needle bar 210, and the boss 220 is located in the mounting groove 111 and abuts against the bottom wall of the mounting groove 111.

The needle bar 210 is a length of bar body with one end extending out of the housing body 110 to be able to extend into the liquid injection hole of the top end cap of the battery and the other end located in the mounting groove 111. The end of the needle bar 210 extending out of the housing body 110 may be tapered so as to have a good guiding effect when the needle bar 210 is inserted into the injection hole.

The bottom wall of the mounting groove 111 refers to the groove wall of the mounting groove 111 located below.

The boss 220 is a structure protruding on the needle bar 210 and used for contacting with the housing 100, and the diameter of the boss 220 is larger than that of the needle bar 210, so that when one end of the probe 200 extends into the mounting groove 111 in the housing body 110, the boss 220 can be mutually limited with the housing body 110 when being abutted against the bottom wall of the mounting groove 111, and the risk that the whole probe 200 is separated from the housing body 110 under the action of gravity is reduced. The material of the boss 220 may be the same as that of the needle bar 210, and the boss 220 and the needle bar 210 may be welded or integrally formed to form an integral structure, so that the boss 220 and the needle bar 210 have a relatively stable connection effect. Of course, in other examples, boss 220 may be coupled to needle shaft 210 using a screw connection or other removable connection.

By extending one end of the needle bar 210 out of the housing body 110, the needle bar 210 is facilitated to extend into the liquid injection hole of the battery. By protruding the boss 220 to the needle bar 210, the diameter of the protruding strip is larger than that of the needle bar 210, and the boss 220 is located in the mounting groove 111 and abuts against the bottom wall of the mounting groove 111, on one hand, when the probe 200 moves upwards, the boss 220 of the probe 200 can be separated from the bottom wall of the mounting groove 111 of the housing 100, so that the effect that the probe 200 is separated from the housing 100 is achieved; on the other hand, the probe 200 is allowed to abut against the bottom wall of the mounting groove 111 in a natural state, so that the risk of dropping the probe 200 is reduced.

As shown in fig. 1, in another example, the liquid injection hole detection tool further includes an elastic telescopic mechanism 300, where the elastic telescopic mechanism 300 is installed in the installation groove 111 and can be telescopic up and down in the installation groove 111, and the elastic telescopic mechanism 300 is sleeved outside the needle rod 210 and abuts against the top end of the boss 220.

The elastic expansion mechanism 300 is a mechanism that can provide elastic force and expand and contract in the mounting groove 111, and may be a spring, a spring piece, or the like. In order to prevent the risk of shorting between the elastic telescopic mechanism 300 and the probe 200, the elastic telescopic mechanism 300 is a spring, and the inner diameter of the elastic telescopic mechanism is larger than the outer diameter of the needle bar 210.

Through installing elastic telescopic machanism 300 in mounting groove 111, and elastic telescopic machanism 300 cover locates outside needle bar 210 to with the top butt of boss 220, then on the one hand have good direction and buffering effect in probe 200 upward movement process, reduce the risk of probe 200 skew, and then can improve the degree of accuracy and the sensitivity of switch isolator 400 response probe 200 and casing 100 contact. In addition, the arrangement also enables the probe 200 to reset under the drive of the elastic telescopic mechanism 300, so that the condition that the probe 200 is reset manually is reduced.

As shown in fig. 1, in order to prevent the risk of shorting between the elastic telescopic mechanism 300 and the housing 100, in this example, the top end of the mounting groove 111 has an opening, and the housing 100 further includes a first insulating sleeve 120, where the first insulating sleeve 120 is fixedly mounted; the top end of the elastic telescoping mechanism 300 is connected to the first insulating sleeve 120.

The top end of the mounting groove 111 has an opening through which one end of the probe 200 and the elastic telescoping mechanism 300 can be fitted into the mounting groove 111. The opening may be circular, rectangular, or other shape, etc.

The first insulating cover 120 is a member that performs an insulating function and serves to close the opening of the installation groove 111. The material of the first insulating sleeve 120 may be rubber or silica gel, or may be other insulating materials. The first insulating sleeve 120 may be fixedly installed at the opening by a threaded connection, a snap connection or a pin connection. By this arrangement, the stability of the first insulating cover 120 can be improved, and thus the risk of the elastic telescoping mechanism 300 being ejected out of the mounting groove 111 can be reduced. The needle bar 210 of the probe 200 may be located inside the first insulating sheath 120 or may protrude outside the first insulating sheath 120.

By connecting the tip of the elastic expansion mechanism 300 to the first insulating cover 120, the risk of the elastic expansion mechanism 300 being short-circuited with the case body 110 can be reduced. In addition, by the arrangement, stable support can be provided for the telescopic movement of the elastic telescopic mechanism 300, and the risk that the elastic telescopic mechanism 300 pops out of the mounting groove 111 is reduced.

As shown in fig. 1, in order to reduce the tilting of the elastic telescopic mechanism 300, in this example, the first insulating sleeve 120 is provided with a limiting groove communicating with the mounting groove 111, and the tip of the elastic telescopic mechanism 300 extends into the limiting groove.

The limiting groove is a groove that can limit the elastic telescoping mechanism 300. The shape of the limit groove may be adapted to the shape of the elastic telescoping mechanism 300 or may be different from the shape of the elastic telescoping mechanism 300. For example, when the elastic telescopic mechanism 300 is a cylindrical spring, the shape of the limiting groove may be a circular groove structure or a rectangular groove structure.

Through stretching into the spacing inslot with the top of elastic telescoping mechanism 300, then make the cell wall of spacing groove play better spacing effect to elastic telescoping mechanism 300 on the one hand, on the other hand still makes the spacing groove play better guide effect to the concertina movement of elastic telescoping mechanism 300 in its depth direction, and then reduces the risk that the probe 200 that is connected with elastic telescoping mechanism 300300 takes place the skew to this annotate liquid hole detection frock's detection precision has been improved.

As shown in fig. 1, in order to reduce the risk of shorting between the probe 200 and the housing body 110, in this example, the housing 100 further includes a second insulating sleeve 130, and the bottom end of the housing body 110 further has a mating hole in communication with the mounting groove 111, and the second insulating sleeve 130 is mounted in the mating hole; the probe 200 penetrates the second insulating sheath 130.

The second insulating sheath 130 is a member for insulating a part of the probe 200 from the housing body 110. It will be appreciated that one end of the probe 200 needs to extend through the bottom end of the housing body 110 so as to extend outside the housing body 110 to extend into the injection well. The second insulating sleeve 130 may be connected to the mating hole in a screw connection or a snap connection, or the second insulating sleeve 130 may be mated to the mating hole in an interference fit manner.

The fitting hole is a hole through which the probe 200 is inserted out of the housing body 110, and penetrates the bottom of the housing body 110. The size of the fitting hole needs to be larger than the size of the portion of the probe 200 that passes out of the mounting groove 111, i.e., the portion of the probe 200 that passes out of the mounting groove 111 is in clearance fit with the fitting hole.

Through installing the second insulating sleeve 130 in the matching hole, and the probe 200 penetrates through the second insulating sleeve 130, the probe 200 can be prevented from contacting the shell body 110, so that a good insulating effect is achieved between the probe 200 and the shell body 110, and the risk of shorting between the probe 200 and the shell body 110 is reduced.

The invention also provides a detection device, which comprises a driving device and a liquid injection hole detection tool, wherein the specific structure of the liquid injection hole detection tool refers to the embodiment, and the detection device at least has all the beneficial effects brought by the technical scheme of the embodiment because the detection device adopts all the technical schemes of all the embodiments, and the detailed description is omitted. The driving device is in transmission connection with the liquid injection hole detection tool to drive the liquid injection hole detection tool to move up and down.

The driving device is used for driving the liquid injection hole to detect the device of the up-and-down motion of the frock. The driving device can be a cylinder, a linear motor, a screw-nut device or a gear-rack assembly, etc. The driving device can be in transmission connection with the casing 100, so that the probe 200 on the casing 100 can be driven to move up and down together while the casing 100 is driven to move up and down, and the effect of extending the probe 200 into or out of the liquid injection hole is achieved.

Through being connected drive arrangement and notes liquid hole detection frock transmission, then drive arrangement can drive notes liquid hole detection frock up-and-down motion to realize annotating the downthehole effect of notes liquid that probe 200 in the liquid hole detection frock stretched into the top of battery and cover, and then detect and annotate the liquid hole and be blocked, thereby realize judging whether the effect of reverse dress of plastic part down, reduced the probability that bad product flowed.

In one example, the detection device is a pole short detection device.

The pole short circuit detection device is used for detecting whether the pole is short-circuited with the top end cover or not.

Through setting up this check out test set to utmost point post short circuit check out test set, then make annotate liquid hole detection frock and install in utmost point post short circuit check out test set, and then realize annotating the effect that liquid hole detection process and utmost point post short circuit detection process go on simultaneously to production test's efficiency has been improved. Meanwhile, as the liquid injection hole detection process is combined into the pole short circuit test process, the liquid injection hole detection post is not required to be increased. In addition, as each product needs to be subjected to the pole short circuit test procedure, after the liquid injection hole detection procedure is combined into the pole short circuit test procedure, each product can also be subjected to the detection procedure of whether the liquid injection hole is blocked or not, so that the condition of missing detection of the quality of the liquid injection hole is reduced, and the yield of the product is improved.

The present invention also proposes a detection method, as shown in fig. 2, because the detection method is based on the detection device, and the specific structure of the detection device refers to the above embodiments, all the technical solutions of all the embodiments are adopted, and at least all the beneficial effects brought by the technical solutions of the embodiments are not described in detail herein. The detection method comprises the following steps:

S10: the driving device drives the liquid injection hole detection tool to move downwards so that the probe 200 extends into the liquid injection hole of the battery.

The driving device can be a cylinder, a screw-nut mechanism, a linear motor or a gear-rack assembly, etc. The driving device drives the liquid injection hole detection tool to move downwards, so that the probe 200 can extend into the liquid injection hole of the battery, and the probe is used for detecting whether the liquid injection hole is in a unobstructed state.

S20: detecting the state of the probe 200, and judging the state of the liquid injection hole of the battery according to the state of the probe 200; and judging the assembly state of the lower plastic part in the battery according to the state of the liquid injection hole of the battery.

The probe 200 has two states after extending into the injection hole: when the liquid injection hole is in a unobstructed state, namely the lower plastic part is not reversely assembled, the probe 200 cannot be interfered by the lower plastic part, and then the probe 200 cannot move upwards, so that the probe 200 is always in an initial state. If the liquid injection hole is in a blocking state, that is, after the lower plastic part is reversely assembled, the probe 200 is interfered by the lower plastic part, so that the lower plastic part has a supporting force on the probe 200, when the driving device continues to drive the liquid injection hole detection tool to move downwards, the probe 200 moves upwards under the action of the lower plastic part, and the probe 200 is in another state. For example, when the probe 200 is in the initial position in contact with the housing 100, the probe 200 is in the second state in contact with the housing 100 when the pouring hole is in the clear state, and the probe 200 is in the first state in which it is separated from the housing 100 when the pouring hole is in the closed state. Therefore, when the probe 200 is judged to be in the initial state, the liquid injection hole is judged to be in the unobstructed state; when it is determined that the probe 200 is in the second state, it is determined that the liquid injection hole is in the closed state. Alternatively, when the probe 200 is separated from the housing 100 to an initial state and the probe 200 can abut against the housing 100 when moving upward relative to the housing 100, the probe 200 is in a first state separated from the housing 100 when the liquid injection hole is in a clear state; when the pouring hole is in the closed state, the probe 200 is in the second state of abutting against the housing 100. Therefore, when it is judged that the probe 200 is in the initial state, it is judged that the liquid injection hole is in the unobstructed state; when it is determined that the probe 200 is in the second state, it is determined that the liquid injection hole is in the closed state.

Whether the lower plastic is reversely arranged can directly influence the state of the liquid injection hole. When the lower plastic part is not reversely assembled, the liquid injection hole is in a smooth state. After the lower plastic part is reversely assembled, the lower opening of the liquid injection hole can be blocked by the lower plastic part, so that the liquid injection hole is in a blocking state. Therefore, the assembly state of the lower plastic part can be reversely judged according to the state of the liquid injection hole of the battery, and the effect of detecting whether the lower plastic part is reversely assembled or not is further achieved. When the liquid injection hole of the battery is judged to be in a smooth state, the lower plastic part is reversely proved to be in a normal assembly state, namely the lower plastic is not reversely assembled. When the liquid injection hole of the battery is judged to be in a blocking state, the lower plastic part is reversely proved to be in an abnormal assembly state, namely the lower plastic part is reversely assembled.

In the detection method in the technical scheme of the invention, the driving device drives the liquid injection hole detection tool to move downwards, so that the probe 200 can extend into the liquid injection hole; the probe 200 is inserted into the liquid injection hole and then has a state in which it is maintained at an initial position with respect to the housing 100 or a state in which it moves upward with respect to the housing 100, and whether the liquid injection hole is in a clear state or a closed state is determined by detecting whether the probe 200 is in an initial state or an upward moving state after being inserted into the liquid injection hole. According to the state of the liquid injection hole of the battery, whether the lower plastic part in the battery is reversely assembled or not can be judged, so that the detection efficiency is improved, and meanwhile, the risk of outflow of bad products is reduced through the detection method.

In an example, as shown in fig. 3, the states of the probe 200 include a first state of being disengaged from the housing 100 and a second state of being abutted with the housing 100; wherein, S20: detecting the state of the probe 200, and judging the state of the liquid injection hole of the battery according to the state of the probe 200; according to the state of annotating the liquid hole of battery, judge the assembly state of lower plastic part in the battery, it includes:

s21: when the detection probe 200 is in the first state, it is determined that the liquid injection hole of the battery is in a blocked state.

In this example, when the probe 200 is in the first state, the probe 200 moves upward to be separated from the housing 100, so that it can be judged that the filling hole of the battery is blocked.

S22: and judging that the lower plastic part is in a reversely-mounted state according to the state that the liquid injection hole of the battery is blocked.

Because the liquid injection hole is plugged, the lower plastic part is reversely assembled, so that the state of the lower plastic part can be reversely judged according to the state of the liquid injection hole. When the liquid injection hole is in a blocked state, the lower plastic part can be judged to be in a reversely-mounted state.

In another example, as shown in fig. 4, the states of the probe 200 include a first state of being disengaged from the housing 100 and a second state of being abutted with the housing 100; wherein, S20: detecting the state of the probe 200, and judging the state of the liquid injection hole of the battery according to the state of the probe 200; according to the state of annotating the liquid hole of battery, judge the assembly state of lower plastic part in the battery, it includes:

S20a: when the detection probe 200 is in the second state, it is determined that the liquid injection hole of the battery is in a clear state.

When the probe 200 is in the first state, the probe 200 abuts against the housing 100, i.e., the probe 200 does not move upward, so that it can be judged that the liquid filling hole of the battery is not blocked.

S20b: and judging that the lower plastic part is in a normal state according to the state that the liquid injection hole of the battery is in a smooth state.

The liquid injection hole can not be blocked due to normal assembly of the lower plastic part, namely, the liquid injection hole is in a smooth state. Therefore, the state of the lower plastic part can be reversely judged according to the state of the liquid injection hole. When the liquid injection hole is in a smooth state, the lower plastic part can be reversely judged to be in a normal assembly state, and the lower plastic part is not reversely assembled.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. Annotate liquid hole detection frock, its characterized in that includes:

A housing;

the probe is arranged on the shell and can move relative to the shell; the probe has a first state of being disengaged from the housing and a second state of being in abutment with the housing; and

the switch isolator is used for sensing the state of the probe, when the probe is in the second state, the shell comprises a shell body, a mounting groove is formed in the shell body, one end of the probe stretches into the mounting groove and is in butt joint with the bottom wall of the mounting groove, so that the probe is electrically connected with the bottom wall of the mounting groove, and the other end of the probe stretches downwards and stretches out of the shell body; the housing, the probe and the switch isolator are connected in series to form a closed electrical circuit.

2. The pour hole detection tool of claim 1, wherein the probe comprises:

one end of the needle rod extends out of the shell body and is used for extending into the liquid injection hole of the battery, and the other end of the needle rod is positioned in the mounting groove; and

the boss is arranged on the needle bar in a protruding mode, the diameter of the boss is larger than that of the needle bar, and the boss is located in the mounting groove and is abutted to the bottom wall of the mounting groove.

3. The liquid injection hole detection tool as set forth in claim 2, further comprising an elastic telescopic mechanism mounted in the mounting groove and capable of extending up and down in the mounting groove, wherein the elastic telescopic mechanism is sleeved outside the needle bar and abuts against the top end of the boss.

4. The liquid injection hole detection tool as set forth in claim 3, wherein the top end of the mounting groove is provided with an opening, the shell further comprises a first insulating sleeve, and the first insulating sleeve is fixedly installed at the opening; the top end of the elastic telescopic mechanism is connected with the first insulating sleeve.

5. The liquid injection hole detection tool according to claim 4, wherein the first insulating sleeve is provided with a limiting groove communicated with the mounting groove, and the top end of the elastic telescopic mechanism extends into the limiting groove.

6. The liquid injection hole detection tool according to any one of claims 1 to 5, wherein the housing further comprises a second insulating sleeve, the bottom end of the housing body further comprises a matching hole communicated with the mounting groove, and the second insulating sleeve is mounted in the matching hole; the probe penetrates the second insulating sleeve.

7. A detection apparatus comprising a drive means and a liquid injection hole detection tool as claimed in any one of claims 1 to 6, said drive means being in driving connection with said liquid injection hole detection tool to drive said liquid injection hole detection tool to move up and down.

8. The detection device of claim 7, wherein the detection device is a pole short detection device.

9. A detection method based on the detection apparatus according to claim 7 or 8, comprising:

the driving device drives the liquid injection hole detection tool to move downwards so that the probe extends into the liquid injection hole of the battery;

10. The method of detecting according to claim 9, wherein the state of the probe includes a first state of being disengaged from the housing and a second state of being abutted against the housing; the shell comprises a shell body, a mounting groove is formed in the shell body, one end of the probe extends into the mounting groove and is in butt joint with the bottom wall of the mounting groove, so that the probe is electrically connected with the bottom wall of the mounting groove, and the other end of the probe extends downwards and extends out of the shell body; the state of the probe is detected, and the state of the liquid injection hole of the battery is judged according to the state of the probe; and judging the assembly state of the lower plastic part in the battery according to the state of the liquid injection hole of the battery, wherein the step of judging the assembly state of the lower plastic part in the battery comprises the following steps:

When the probe is detected to be in a first state, judging that a liquid injection hole of the battery is in a blocking state;

11. The method of detecting according to claim 9, wherein the state of the probe includes a first state of being disengaged from the housing and a second state of being abutted against the housing; the state of the probe is detected, and the state of the liquid injection hole of the battery is judged according to the state of the probe; and judging the assembly state of the lower plastic part in the battery according to the state of the liquid injection hole of the battery, wherein the step of judging the assembly state of the lower plastic part in the battery comprises the following steps:

when the probe is detected to be in the second state, judging that the liquid injection hole of the battery is in a unobstructed state;