CN220751072U

CN220751072U - Battery cell tab detection system

Info

Publication number: CN220751072U
Application number: CN202322398216.5U
Authority: CN
Inventors: 何青青
Original assignee: Chongqing Talent New Energy Co Ltd
Current assignee: Chongqing Talent New Energy Co Ltd
Priority date: 2023-09-04
Filing date: 2023-09-04
Publication date: 2024-04-09
Anticipated expiration: 2033-09-04

Abstract

The utility model discloses a battery cell tab detection system, which comprises: the fixing unit is used for fixing the battery cell to be detected; the alignment unit comprises an alignment surface which can be in abutting contact with a reference surface of the battery cell, wherein the reference surface is one side surface adjacent to the position of the tab on the battery cell; and the detection unit outputs position detection information of the tab based on the position information of the alignment surface. By setting the alignment unit as a detection unit and taking the alignment unit as a reference in the detection process, the CCD detection is calibrated, whether the CCD grabbing point is accurate or not is confirmed, and the accuracy of the position detection information of the lug is improved. Through detecting the lug position on the electric core in this application, promote the one-time yield of battery production and improve production efficiency.

Description

Battery cell tab detection system

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cell tab detection system.

Background

Most of the existing digital products are lithium ion batteries, including new energy electric vehicles with fire heat in recent years, and are widely used. Because lithium has a small atomic weight, a battery using lithium as an anode has a high energy density. In addition, lithium batteries are favored because of their small size, light weight, long life, good performance, no pollution, and the like. The lithium ion battery comprises the following components: positive electrode, diaphragm, negative electrode, organic electrolyte and battery shell.

The tab is a component of a soft package lithium ion battery product. The battery is divided into a positive electrode and a negative electrode, and the electrode lugs are metal conductors for leading out the positive electrode and the negative electrode from the battery core, so that the ears of the positive electrode and the negative electrode of the battery are commonly referred to as contact points during charge and discharge. The positive electrode of the battery is made of aluminum (Al) material, the negative electrode of the battery is made of nickel (Ni) material, and the negative electrode of the battery is also made of copper nickel-plated (Ni-Cu) material, and the battery is formed by compounding a film and a metal belt.

In the tab welding procedure, after the battery cell is shaped, the positive and negative foil tabs are pre-welded and the tabs are cut, main welding is carried out on the positive and negative tabs welded on the foil tabs, the positive and negative tab distances are output after the main welding is finished, the positive and negative tab distances are one of main parameters of welding management and control, if the tab distances do not meet the process requirements, packaging can be caused, and the battery cell is sealed and leaked in a virtual manner due to tab deviation, so that potential safety hazards of the battery cell are caused.

Disclosure of Invention

In view of the above-mentioned drawbacks or shortcomings in the prior art, it is desirable to provide a battery tab detection system, which can realize detection of tabs, improve detection accuracy, improve primary yield of battery production, and improve production efficiency.

The application provides a battery cell tab detecting system, include:

the fixing unit is used for fixing the battery cell to be detected;

the alignment unit comprises an alignment surface which can be in abutting contact with a reference surface of the battery cell, wherein the reference surface is one side surface adjacent to the position of the tab on the battery cell;

and the detection unit outputs position detection information of the tab based on the position information of the alignment surface.

Optionally, the fixing unit includes a clamping seat and a clamping plate disposed on the clamping seat, and the clamping plate is movably or detachably connected with the clamping seat.

Optionally, a clamping block is fixedly arranged on the clamping seat; the clamping seat is also provided with a supporting mechanism, and the clamping plate is movably or detachably connected with the clamping seat through the supporting mechanism.

Optionally, the alignment unit provides the alignment surface through a stopper, and the detection unit obtains reference position information based on alignment surface position information of the stopper to output position detection information of the tab based on the reference position information.

Optionally, the stop includes a reference surface disposed opposite the alignment surface; the shape of the alignment surface is a smooth surface matched with the shape of the reference surface of the battery cell; the reference plane is a straight plane, and the detection unit obtains the reference position information based on the position information of the reference plane.

Optionally, the edge of the alignment surface provided by the stop is higher than the surface of the cell to be tested.

Optionally, the alignment unit includes a driving mechanism fixedly connected with the stop block, and the driving mechanism is used for driving the stop block to contact with the reference surface.

Optionally, the driving mechanism comprises a first driving sub-mechanism, a second driving sub-mechanism and a third driving sub-mechanism, and the first driving sub-mechanism is fixedly connected with the stop block;

the first driving sub-mechanism is used for driving the stop block to move along a first direction;

the second driving sub-mechanism is used for driving the first driving sub-mechanism and the stop block on the first driving sub-mechanism to move along a second direction;

the third driving sub-mechanism is used for driving the second driving sub-mechanism and the second driving sub-mechanism, the first driving sub-mechanism and the stop block on the second driving sub-mechanism to move along a third direction.

Optionally, the detection unit and the fixing unit are located on the same side of the third driving sub-mechanism, and the first driving sub-mechanism and the second driving sub-mechanism are located on the other side of the third driving sub-mechanism;

the alignment unit further comprises an extension piece, the extension piece comprises a first connecting end and a second connecting end, the first connecting end is fixedly connected with the first driving sub-mechanism, and the second connecting end is fixedly connected with the stop block.

Optionally, the method further comprises:

the conversion assembly is provided with a plurality of feeding stations, each feeding station is provided with a fixing unit, and the conversion assembly is used for driving the fixing unit where the battery cell to be detected is located to move to the detection area where the detection unit is located.

The technical scheme provided by the embodiment of the utility model can comprise the following beneficial effects:

according to the battery cell tab detection system provided by the embodiment of the utility model, the alignment unit is used as a reference in the detection process by arranging the alignment unit as the detection unit, the CCD detection is calibrated, whether the CCD grabbing point is accurate or not is confirmed, and the accuracy of the position detection information of the tab is improved. Through detecting the lug position on the electric core in this application, promote the one-time yield of battery production and improve production efficiency.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:

fig. 1 is a schematic structural diagram of a battery cell tab detection system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a battery cell according to an embodiment of the present application;

fig. 3 is a schematic position diagram of position detection information of a tab according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a conversion assembly according to an embodiment of the present disclosure;

fig. 5 is a flowchart of a method for detecting a battery cell tab according to an embodiment of the present application.

In the figure:

100. a fixing unit; 200. an alignment unit; 300. a detection unit;

10. a battery cell; 20. a tab; 30. a reference surface;

110. a clamping seat; 120. a clamping plate; 130. clamping blocks; 140. a support mechanism;

101. a side surface; 102. a surface; 103. a first end face; 104. a second end face; 201. a first tab; 202. a second lug;

210. a stop block; 220. an alignment surface; 230. a reference surface; 240. a driving mechanism; 241. a first drive sub-mechanism; 242. a second drive sub-mechanism; 243. a third drive sub-mechanism; 250. an extension member; 251. a first connection end; 252. a second connection end;

400. a conversion assembly; 410. and (5) a station.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Please refer to fig. 1 in detail, the present application provides a battery cell tab detection system, which includes:

a fixing unit 100 for fixing the battery cell 10 to be tested;

an alignment unit 200, wherein the alignment unit 200 comprises an alignment surface 220 capable of abutting and contacting with a reference surface 30 of the battery cell 10, and the reference surface 30 is one of side surfaces 101 adjacent to the position of the tab 20 on the battery cell 10;

and a detection unit 300, wherein the detection unit 300 is used for outputting position detection information of the tab 20 based on the position information of the alignment surface 220.

According to the battery cell tab detection system provided by the embodiment of the application, the alignment unit 200 is arranged as the detection unit 300 to be used as a reference in the detection process, the detection unit 300 can detect the tab in a CCD mode, the alignment unit 200 is used for calibrating CCD detection of the battery cell tab, whether the CCD grabbing point is accurate or not is confirmed, and the accuracy of position detection information of the tab 20 is improved. Through detecting the position of the lug 20 on the battery cell 10, the primary yield of battery production is improved, and the production efficiency is improved.

The lithium ion battery can be classified into soft package, square and cylindrical batteries according to the packaging mode and the appearance, the type of the battery cell 10 is not limited in the embodiment of the application, and the manufacturing mode of the battery cell 10 can be divided into laminated type and winding type. The lamination type is to cut the positive pole piece, the negative pole piece and the diaphragm into the size of the specified size, then to laminate the positive pole piece, the diaphragm and the negative pole piece into a small cell 10 monomer, and then to laminate the small cell 10 monomer and connect in parallel to form a large cell 10. The winding type is to fix the pole piece after the slitting on a winding needle and wind the positive pole piece, the negative pole piece and the diaphragm into the battery cell 10 along with the rotation of the winding needle.

Taking the laminated battery cell 10 as shown in fig. 2 as an example, after the laminated core is rolled, the diaphragm cannot be completely attached along the width direction of the laminated core, so that misjudgment can be generated in the CCD detection process, and the misjudgment rate is even up to 100%. In this embodiment of the present application, the stop block 210 may further shape the battery cell 10, and only needs to ensure that the contact surface between the stop block 210 and the battery cell 10 is attached, and ensure that the diaphragm tail coil has no protrusion, and each battery cell 10 is consistent with the stop block 210, so that the protrusion inconsistency of the diaphragm tail coil will not occur, and the misjudgment of the CCD will not be caused.

In this embodiment of the present application, the battery cell 10 includes two opposite side surfaces 101, two surfaces 102 perpendicular to the two side surfaces 101, and two end surfaces perpendicular to the side surfaces 101 and the surfaces 102, where the two end surfaces include a first end surface 103 and a second end surface 104 that are opposite; the two side surfaces 101 are disposed opposite to each other in the width direction of the battery cell 10, the two surfaces 102 are disposed opposite to each other in the height direction of the battery cell 10, and the first end surface 103 and the second end surface 104 are disposed opposite to each other in the length direction of the battery cell 10.

The tab 20 includes a first tab 201 and a second tab 202 that are disposed at intervals on the first end surface 103, where the first tab 201 and the second tab 202 are disposed parallel to the two surfaces 102, and the first tab 201 is disposed on a side close to the reference surface 30. The first tab 201 may be a positive tab 20, and the second tab 202 may be a negative tab 20.

The battery cell 10 is a Z-shaped laminated battery cell 10, and includes a positive electrode plate, a negative electrode plate and a diaphragm, wherein the positive electrode plate and the negative electrode plate are mutually staggered and stacked, and a diaphragm is sandwiched between each layer of positive electrode plate and negative electrode plate; the cross section of the diaphragm is folded in a Z shape; a plurality of positive lugs 202 which are connected with the positive pole piece into a whole are arranged on the positive pole piece; the negative electrode plate is provided with a plurality of negative electrode lugs 201 which are connected with the negative electrode plate into a whole, after the Z-shaped laminated battery cell 10 is formed, the positions of the positive electrode lugs 202 on the laminated battery cell 10 are overlapped, and the positions of the negative electrode lugs 201 on the laminated battery cell 10 are overlapped.

As shown in fig. 3, the position detection information of the tab 20 includes first tab position information F1 and/or second tab 202 position information F2, where the first tab position information F1 is interval information between the first tab 201 and the reference surface 30, and the second tab 202 position information F2 is interval information between the first tab 201 and the second tab 202.

It may be appreciated that, in this embodiment of the present application, the position detection information may further include other position information of the tab 20, for example, distance information between the second tab 202 and the reference surface 30, or distance information between the second tab 202 and the side 101 adjacent to the second tab 202, etc., which is not limited in this application.

The detection unit 300 in the embodiment of the present application may adopt a plurality of different CCD detection modes in the prior art, for example, an image processing technology may be adopted, and the image may be segmented, analyzed, transformed, extracted by means of computer vision, computer graphics, digital image processing, and the like, so as to complete the related functions.

In one embodiment of the present application, the fixing unit 100 includes a holder 110 and a clamping plate 120 disposed on the holder 110, where the clamping plate 120 is movably or detachably connected to the holder 110, and the clamping plate 120 is used to fix the to-be-detected cell 10 on the holder 110.

In this application, through the movable or detachable connection mode of the clamping plate 120 and the clamping seat 110, the feeding of the battery cell 10 can be facilitated, and it can be understood that in the embodiment of the application, the feeding mode of the battery cell 10 is not limited to the sucking and grabbing modes, and in different embodiments, the feeding mode can be selected as required. The clamping seat 110 is used for contacting one surface 102 of the battery cell 10, the clamping plate 120 is used for contacting the other surface 102 of the battery cell 10, the clamping plate 120 and the clamping seat 110 can perform feeding, positioning and shaping on the battery cell 10, and the position of the battery cell 10 is fixed.

In an alternative embodiment, a clamping block 130 is fixedly arranged on the clamping seat 110, and the clamping block 130 is used for contacting with the second end surface 104; the clamping seat 110 is also provided with a supporting mechanism 140, and the clamping plate 120 is movably or detachably connected with the clamping seat 110 through the supporting mechanism 140; in the embodiment of the present application, the movable manner of the supporting mechanism 140 is not limited, so long as the upper level of the battery cell 10 can be achieved, the supporting mechanism 140 may be a hydraulic, pneumatic, motor or other movement manner. The support mechanism 140 may be detachable by using pins, bolts, or the like. The position of the supporting mechanism 140 is not limited in this application, and the supporting mechanism 140 may be disposed on the clamping block 130, and may also be disposed near the side 101 of the cell 10.

The clamping plate 120 is in contact with one of the surfaces 102 of the battery cell 10, and the contact position of the clamping plate 120 with the surface 102 exposes at least the tab 20 on the first end of the surface 102. The length of the clamping plate 120 may be equal to or less than the lengths of the positive pole piece and the negative pole piece, so that the clamping plate 120 may expose the tab 20 on the battery cell 10 at a position close to the first end surface 103 of the battery cell 10, thereby preventing interference generated when detecting the position of the tab 20 on the CCD and improving the detection position.

In this embodiment, the alignment unit 200 includes a stop 210 for providing the alignment surface 220, and the detection unit 300 is configured to obtain reference position information based on position information of the alignment surface 220 of the stop 210, so as to output position detection information of the tab 20 based on the reference position information. In this embodiment, the alignment unit 200 contacts the side 101 of the battery cell 10, and the stop block 210 not only detects the position information of the tab 20 in the detection unit 300, but also positions the battery cell 10, and shapes the side 101 of the battery cell 10. In order to ensure the consistency of the detection process of each cell 10, the fixing unit 100 is not movable after the cell 10 is fixed, and because the cell 10 is already fixed in position, the positioning of the cell 10 can be realized only by matching the calibration stop block 210 with the position of the feeding cell 10 without moving a clamp, thereby improving the detection efficiency.

It should be noted that, in the embodiment of the present application, the number of the alignment units 200 is not limited, and the number of the alignment units 200 may be one, and the one side 101 of the battery cell 10 is contacted by one stop 210, and the side 101 is used as the reference surface 30 of the position detection information of the tab 20; the number of the alignment units 200 may be two, and the two stoppers 210 are respectively contacted with the two side surfaces 101 of the battery cell 10, and the two side surfaces 101 are the reference surfaces 30 of the position detection information of the tab 20, which are set according to the requirements of the position detection information of the tab 20 in different embodiments, which is not limited in this embodiment.

Optionally, the height of the stop 210 in the direction perpendicular to the surface 102 of the cell 10 is greater than the height of the cell 10 in the direction perpendicular to the surface 102, i.e. the edge of the alignment surface 220 provided by the stop 210 is higher than the surface 102 of the cell 10 to be tested.

If the thickness of the stopper 210 is lower than the thickness of the battery cell 10, the protrusion of the tail coil of the diaphragm cannot smooth the adhesion, and may cause erroneous judgment in the CCD detection. Illustratively, the height of the stop block 210 is 1-2mm higher than that of the battery cell 10, so that the protrusion caused by tail winding on the battery cell 10 can be covered, misjudgment caused by CCD detection is prevented, and when the thickness of the stop block is matched with that of the battery cell 10, the edge of the stop block 210 can be grasped, so that the reference function when the CCD detects the position information of the tab 20 is realized.

Optionally, the stop 210 includes a datum surface 230 disposed opposite the alignment surface 220; the shape of the alignment surface 220 is a smooth surface matching the shape of the reference surface 30 of the cell 10; the reference plane 230 is a flat plane, and the detecting unit 300 is configured to obtain the reference position information based on the position information of the reference plane 230.

The material and shape of the stopper 210 are not limited in this application. The CCD can identify the grabbing edge only by being capable of keeping certain hardness unchanged. When the alignment surface 220 is smooth to prevent the stop block 210 from aligning the battery cell 10, the stop block 210 may be made of a rubber material to prevent the surface 102 of the battery cell 10 from being scratched or damaged, and the reference surface 230 may be shaped to match the shape of the battery cell 10, for example, when detecting the wound battery cell 10, the alignment surface 220 of the stop block 210 may be shaped to match the shape of the side 101 of the wound battery cell 10. The detecting unit 300 may correct only the thickness of the stopper 210 when determining the position detection information of the tab 20.

In another embodiment of the present application, the alignment unit 200 includes a driving mechanism 240 fixedly connected to the stop block 210, where the driving mechanism 240 is configured to drive the stop block 210 to contact the reference surface 30. In this embodiment of the application, by setting the driving mechanism 240 capable of driving the stop block 210 to move, the upper precision of the battery cell 10 is reduced, the positioning difficulty of the battery cell 10 is reduced, and the detection precision is improved.

Optionally, the driving mechanism 240 includes a first driving sub-mechanism 241, a second driving sub-mechanism 242, and a third driving sub-mechanism 243, where the first driving sub-mechanism 241 is fixedly connected with the stop block 210;

the first driving sub-mechanism 241 is used for driving the stop block 210 to move along a first direction;

the second driving sub-mechanism 242 is used for driving the first driving sub-mechanism 241 and the stopper 210 thereon to move along a second direction;

the third driving sub-mechanism 243 is used for driving the second driving sub-mechanism 242 and the second driving sub-mechanism 242 thereon, the first driving sub-mechanism 241 and the stopper 210 to move in a third direction.

In this embodiment of the present application, the first direction X, the second direction Y, and the third direction Z are defined to be perpendicular to each other, or may be near to perpendicular to each other. The first driving sub-mechanism 241, the second driving sub-mechanism 242 and the third driving sub-mechanism 243 can realize the position adjustment of the stop block 210 in multiple directions, and improve the positioning precision of the battery cell 10.

In the embodiment of the present application, the first driving sub-mechanism 241, the second driving sub-mechanism 242, and the third driving sub-mechanism 243 may be a linear movement mechanism such as a cylinder, a linear motor, a rack-and-pinion mechanism, and a screw nut mechanism, and may be selected according to needs in different embodiments. In the embodiments of the present application, the driving sub-mechanisms are illustrated by using a guide rail and a slider that slides on the guide rail.

The detection unit 300 and the fixing unit 100 are located at the same side of the third driving sub-mechanism 243, and the first driving sub-mechanism 241 and the second driving sub-mechanism 242 are located at the other side of the third driving sub-mechanism 243;

the alignment unit 200 further includes an extension member 250, where the extension member 250 includes a first connection end 251 and a second connection end 252, the first connection end 251 is fixedly connected to the first driving sub-mechanism 241, and the second connection end 252 is fixedly connected to the stopper 210.

By arranging the stop block 210 and the driving mechanism 240 on the alignment unit 200, the occupied area can be saved, and the position of the stop block 210 can be adjusted by the extension piece 250, so that the alignment with the battery cell 10 is facilitated.

Optionally, as shown in fig. 4, the battery tab detection system further includes:

the conversion assembly 400 is provided with a plurality of feeding stations 410, each feeding station 410 is provided with one fixing unit 100, and the conversion assembly 400 is used for driving the fixing unit 100 where the cell 10 to be detected is located to move to a detection area where the detection unit 300 is located.

The conversion assembly 400 can be used for detecting the occupied area of the system, so that the cost is saved and the efficiency is improved. The number of the loading stations 410 of the conversion assembly 400 is not limited in the embodiment of the present application, and the loading stations 410 may be one, two, three or more. In this embodiment, the manner in which the conversion assembly 400 drives the fixing unit 100 on the feeding station 410 is not limited, and the arrangement manner of the feeding station 410 on the conversion assembly 400 may be linear or arc-shaped, which is not limited in this application.

It can be understood that the fixing unit 100 can be fixed by the positioning mechanism further disposed on the feeding station 410, and the upper limit of the fixing unit 100 can be driven to move, so as to control the up-down height from the CCD camera to the battery cell 10 to be detected, and control the field of view of the CCD camera, and in different embodiments, the fixing unit 100 can be directly disposed in the field of view of the CCD camera according to the height of the conversion assembly 400, so as to omit the positioning mechanism disposed on the feeding station 410.

Based on the same concept, as shown in fig. 5, the present application further provides a method for detecting a battery cell tab, including:

s10, fixing the battery cell 10 to be detected through the fixing unit 100.

The feeding mode of the battery cell 10 is not limited to the sucking and grabbing modes, and the battery cell 10 is fixed on the fixing unit 100, so that the positioning and shaping of the battery cell 10 and the fixing of the position of the battery cell 10 are realized.

And S20, adjusting the position of the alignment unit 200 so that the alignment surface 220 is in abutting contact with the reference surface 30 of the battery cell 10, wherein the reference surface 30 is one of the side surfaces 101 adjacent to the position of the tab 20 on the battery cell 10.

Specifically, the position of the stop block 210 is adjusted by the driving mechanism 240, so that the stop block 210 is aligned with the side 101 of the battery cell 10, and no interference exists between the stop block 210 and the battery cell 10, and the lamination is smooth.

S30, the detecting unit 300 outputs the position detection information of the tab 20 based on the position information of the alignment surface 220.

The battery cell 10 includes two opposite side surfaces 101, two surfaces 102 perpendicular to the two side surfaces 101, and two end surfaces perpendicular to the side surfaces 101 and the surfaces 102, wherein the two end surfaces include a first end surface 103 and a second end surface 104; the tab 20 includes a first tab 201 and a second tab 202 that are disposed at intervals on the first end surface 103, where the first tab 201 and the second tab 202 are disposed parallel to the two surfaces 102, and the first tab 201 is disposed on a side close to the reference surface 30;

in step S30, the detecting unit 300 outputs position detection information of the tab 20 based on the position information of the alignment surface 220, including:

s31, obtaining reference position information based on the alignment surface position information of the stop block 210;

s32, outputting position detection information of the tab 20 based on the reference position information, where the position detection information of the tab 20 includes first tab position information F1 and/or second tab 202 position information F2.

Optionally, the stop 210 includes a datum surface 230 disposed opposite the alignment surface 220; the shape of the alignment surface 220 is a smooth surface matching the shape of the reference surface 30 of the cell 10; the reference plane 230 is a flat plane, wherein,

the obtaining the reference position information based on the alignment surface position information of the stop 210 in step S31 includes:

s311, acquiring position information of the reference plane 230 through the detection unit 300;

s312, obtaining the reference position information based on the position information of the reference surface 230 and the distance between the alignment surface 220 and the reference surface 230.

Since the alignment surface 220 is in contact with the side surface 101 of the battery cell 10, when the side surface 101 opposite to the alignment surface 220 is selected as a reference for detecting the position of the tab 20, the obtained position detection information of the tab 20 needs to be corrected, and the thickness of the stopper 210 is compensated by an algorithm.

Alternatively, the first tab position information F1 is interval information between the first tab 201 and the reference surface 30, and the second tab 202 position information F2 is interval information between the first tab 201 and the second tab 202, wherein,

obtaining the second lug 202 position information F2 based on the reference position information in the corresponding step S32 includes:

second tab 202 position information F2 is obtained based on the reference position information and the first tab position information F1.

Optionally, the method further comprises:

s40, judging whether the position detection information of the tab 20 is in a preset range or not based on the position detection information, if so, marking the battery cell 10 as a good product, and controlling the good product to enter the next process; if not, marking the battery cell 10 as defective, and controlling to reject the defective.

Taking the example that the preset range of the first tab position information F1 is f1=9±0.5mm and the preset range of the second tab 202 position information F2 is f2=18±0.5mm, when the position detection information of the to-be-detected battery cell 10 obtained by the detection unit 300 is in the preset range, the to-be-detected battery cell is marked as good product, and enters a normal streamline, and if one of the preset ranges is not in the preset range, the to-be-detected battery cell is marked as defective product NG, and then the to-be-detected battery cell is rejected. The normal streamline process can comprise the processes of packaging, baking, liquid injection, aging, formation, secondary sealing, capacity division and the like after welding.

If the edge distance NG of the tab 20, when the encapsulation process is performed at the top sealing position at the encapsulation station 410, the positive and negative tabs 20 are not in the tab grooves and are pressed onto the seal heads, and the seal heads are not pressed down in place, so that the PP layer of the aluminum plastic film is not fused well, and the leakage of the virtual seal is caused; in the application, the position of the tab 20 is detected by the detection unit 300, so that the product quality is improved, and the safety performance of the battery cell 10 is ensured.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the 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 "a plurality" is two or more, unless explicitly defined otherwise.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model pertains. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the utility model. Terms such as "disposed" or the like as used herein may refer to either one element being directly attached to another element or one element being attached to another element through an intermediate member. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.

The present utility model has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. Those skilled in the art will appreciate that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed.

Claims

1. The utility model provides a battery cell tab detecting system which characterized in that includes:

the fixing unit is used for fixing the battery cell to be detected;

2. The battery cell tab detection system of claim 1 wherein the securing unit comprises a holder and a clamping plate disposed on the holder, the clamping plate being movably or detachably connected to the holder.

3. The battery cell tab detection system of claim 2 wherein the clamping block is fixedly disposed on the clamping seat; the clamping seat is also provided with a supporting mechanism, and the clamping plate is movably or detachably connected with the clamping seat through the supporting mechanism.

4. The battery cell tab detection system of claim 1 wherein the alignment unit provides the alignment surface via a stop, the detection unit obtaining reference position information based on alignment surface position information of the stop to output position detection information of the tab based on the reference position information.

5. The battery tab detection system of claim 4 wherein the stop comprises a datum surface disposed opposite the alignment surface; the shape of the alignment surface is a smooth surface matched with the shape of the reference surface of the battery cell; the reference plane is a straight plane, and the detection unit obtains the reference position information based on the position information of the reference plane.

6. The system of claim 4, wherein the stop provides an edge of the alignment surface that is higher than the surface of the cell to be tested.

7. The battery cell tab detection system of claim 4 wherein the alignment unit comprises a drive mechanism fixedly coupled to the stop, the drive mechanism configured to drive the stop into contact with the reference surface.

8. The battery cell tab detection system of claim 7 wherein the drive mechanism comprises a first drive sub-mechanism, a second drive sub-mechanism, a third drive sub-mechanism, the first drive sub-mechanism being fixedly connected with the stop block;

9. The battery tab detection system of claim 8 wherein the detection unit and the fixation unit are located on the same side of the third drive sub-mechanism, the first drive sub-mechanism and the second drive sub-mechanism being located on the other side of the third drive sub-mechanism;

10. The battery tab detection system of claim 1, further comprising: