JP2000090958A - Battery inspection device and method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inspect the winding dislocation of a battery and the bent status of a positive electrode lead highly accurately and efficiently. SOLUTION: Regarding an inspection system 100 for inspecting the dislocated winding of a battery 10 housing a wound group formed out of a strip type positive electrode plate and a strip type negative electrode plate wound via a separator in a battery can, a first photographing camera 312 for photographing the fluoroscopic image of the upper part of the battery 10 on the basis of the transmission or non-transmission of an X-ray through the upper part of the battery 10 carried to a preset inspection position P2, and a second photographing camera 316 for photographing the fluoroscopic image of the lower part of the battery 10 on the basis of the transmission and non-transmission of an X-ray through the lower part of the battery 10 are installed, and the dislocated winding of a wound group and the bent status of a positive electrode lead are inspected on the basis of the fluoroscopic images photographed by the first and the second photographing cameras 312 and 316.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery in which a winding group formed by winding a band-shaped positive plate and a band-shaped negative plate in a battery can with a separator interposed is accommodated. The present invention relates to a battery inspection device and an inspection method for inspecting a battery.

[0002]

2. Description of the Related Art For example, a lithium battery comprises a winding group in which a positive electrode plate and a negative electrode plate provided with current collecting leads (a positive electrode lead and a negative electrode lead) are wound with a separator interposed therebetween. The battery is inserted into the battery can.

[0003] In the case of manufacturing the above-mentioned lithium battery, usually, a winding group in which a positive electrode plate and a negative electrode plate are wound through a separator is produced, and then this winding group is placed in a bottomed cylindrical battery can. Is inserted into.

[0004] Next, an annular groove is formed near the opening of the battery can, and after the negative electrode lead is spot-welded to the inner bottom of the battery can, an electrolyte is injected. Further, a sealing plate is welded to the positive electrode lead, and various sealing components are inserted into the battery can and subjected to sealing and caulking treatment to complete the above-mentioned lithium battery.

By the way, in the above-mentioned lithium battery,
If the positive electrode plate protrudes from the negative electrode plate, lithium is deposited on the protruding positive electrode plate, and there is a possibility of an internal short circuit. Therefore, the displacement of the electrode plate in the winding group (protrusion of the positive electrode plate) is an important item that must be guaranteed to ensure safety.

[0006] Inspection of this winding deviation is generally performed by an X-ray inspection apparatus. Conventionally, an X-ray image is taken after winding or after assembling a battery, and this is visually judged. In some cases, automatic judgment was performed, but due to the structure of the transfer equipment (such as chain transfer), only the upper half image of the battery was captured, and the inspection accuracy was reduced.

[0007] Therefore, conventionally, the inspection threshold value is strict, and the work (battery) determined as NG in the upper half image is determined.
Was manually moved up and down by the operator to make a visual judgment to determine the substantial quality of the battery.

On the other hand, in order to prevent an internal short circuit, the bending of the positive electrode lead (the distance from the negative electrode can) was also visually confirmed.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a battery inspection apparatus and a battery inspection method capable of inspecting a winding deviation of a battery with higher accuracy.

It is another object of the present invention to provide a battery inspection apparatus and a battery inspection method which can omit a subsequent manual inspection by an operator and can simplify an inspection process.

Another object of the present invention is to simultaneously inspect the winding deviation of the battery and the bending of the positive electrode lead,
It is an object of the present invention to provide a battery inspection apparatus and an inspection method that can improve the efficiency of an inspection process.

[0012]

SUMMARY OF THE INVENTION The present invention relates to a battery containing a winding group formed by winding a band-shaped positive plate and a band-shaped negative plate in a battery can with a separator interposed therebetween. In a battery inspection device for inspecting winding deviation, a transparent image of an upper portion and a lower portion of the battery is captured based on transmission and non-transmission of inspection light to an upper portion and a lower portion of the battery transported to a predetermined inspection position. And an inspection unit that inspects at least a winding shift of the winding group based on the perspective image captured by the imaging unit.

That is, an upper perspective image and a lower perspective image of the battery conveyed to the predetermined inspection position are captured through the imaging means, and the winding deviation of the winding group is inspected based on the captured perspective image. .

As described above, in the battery inspection apparatus according to the present invention, the winding deviation of the winding group can be inspected based on the perspective images of the upper and lower parts of the battery. Can be significantly improved.

In this case, the subsequent manual inspection by the operator can be omitted, so that the inspection process can be simplified.

[0016] In the above structure, a transport jig for holding the battery with its axis line in a vertical direction;
Transport means for transporting the transport jig to the inspection position may be provided. In this case, since the battery is transported in a state where the axis of the battery is along the vertical direction,
The upper perspective image and the lower perspective image of the battery can be easily captured.

In the above configuration, it is preferable that the transport jig is made of a material through which the inspection light is transmitted. As a result, a transparent image of the lower part of the battery can be clearly captured, and the inspection accuracy can be improved.

Further, in the above construction, the transport means is provided with an index table having a substantially circular shape in a plane and a rotation drive mechanism for rotating the index table in one direction. Perspective images at the upper part and the lower part may be captured through the imaging means.

Thus, the upper and lower perspective images of the battery can be simultaneously captured, and the efficiency of the winding deviation inspection can be increased.

Further, the transporting means transports the battery so that the phase of the positive electrode lead from the reference position at the time of assembling the battery becomes constant, and the image capturing means transfers the battery at a constant phase from the reference position of the positive electrode lead. Based on the phase, a perspective image of the positive electrode lead may be taken together with the upper part of the battery, and the bending state of the positive electrode lead may be inspected together with the inspection of the winding displacement of the winding group.

In this case, since the winding deviation of the winding group and the bending state of the positive electrode lead can be inspected simultaneously,
The efficiency of the battery inspection process can be further improved,
This is advantageous in reducing the manufacturing cost. In particular, since the battery is transported such that the phase of the positive electrode lead from the reference position at the time of assembling the battery is constant, a perspective image of the positive electrode lead is taken together with the upper part of the battery. The bending state of the lead can be inspected with high accuracy and easily, and variation in accuracy between lots can be minimized.

Further, in the above configuration, a permanent magnet for attracting and holding the battery may be mounted on the transport jig in the transport means.

In this case, it is possible to transport the battery so that the phase of the positive electrode lead from the reference position at the time of assembling the battery is constant, and to improve the accuracy of the inspection of the bent state of the positive electrode lead. Can contribute.

In the above-described battery inspection configuration according to the present invention, X-rays may be used as the inspection light.

Next, the present invention relates to a battery housing in which a winding group formed by winding a band-shaped positive plate and a band-shaped negative plate in a battery can with a separator interposed is accommodated. In the battery inspection method for inspection, transmission of inspection light to the upper and lower parts of the battery conveyed to a predetermined inspection position, based on the opacity, based on the perspective image of the upper and lower parts of the battery, imaging, At least a winding deviation of the winding group is inspected based on the captured fluoroscopic image.

In this case, the battery may be transported to the inspection position while holding its axis in a vertical direction.

Further, the battery is transported so that the phase of the positive electrode lead from the reference position at the time of assembling the battery is constant, and based on the constant phase from the reference position of the positive electrode lead, the upper part of the battery is In addition, a perspective image of the positive electrode lead may be taken, and the bending state of the positive electrode lead may be inspected together with the inspection of the winding displacement of the winding group. Note that X-rays can be used as the inspection light.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment (hereinafter simply referred to as an embodiment) in which a battery inspection apparatus and an inspection method according to the present invention are applied to, for example, inspection of a cylindrical secondary battery (hereinafter simply referred to as a battery). An inspection system according to the embodiment will be described with reference to FIGS.

Before describing the inspection system according to the present embodiment, first, a configuration of a battery to which the inspection system is applied and a method of manufacturing the battery will be briefly described with reference to FIGS.

As shown in FIG. 1, a battery 10 to which the inspection system according to the present embodiment is applied has a battery can 12 having a bottomed cylindrical shape, and a winding sealed in the battery can 12 together with an electrolytic solution. And a group 14.

The winding group 14 is formed by winding a positive electrode plate 16 and a negative electrode plate 18 with a separator 20 interposed therebetween. At the end of the positive electrode plate 16, a positive electrode lead 22 which is a metal lead is provided. A negative electrode lead 24 which is a metal lead is also provided at an end of the plate 18.

The positive electrode lead 22 extends from the winding center of the winding group 14 to the opening 12a of the battery can 12, and
It is welded to the sealing unit 26. The sealing unit 26 includes various sealing components in a gasket 28, that is, a sealing plate 30 to be welded to the positive electrode lead 22, a breaker 32,
The TC ring 34 and the cap member 36 are integrally incorporated, and the sealing unit 26 is fixed to an end of the battery can 12 on the side of the opening 12a. At this time, the various sealing components are undercut, and maintain a laminated state.

The negative electrode lead 24 extends from the outer periphery of the winding group 14 to the inner bottom 12 b of the battery can 12, and
2b is spot-welded, for example.

An annular groove 38 is formed in the battery can 12 near the opening 12a. In the battery can 12, a lower insulating plate 40 and an upper insulating plate 42 are provided for the winding group 14.

Next, a method for manufacturing the battery 10 thus configured will be described with reference to FIG.

First, after a winding group 14 in which the positive electrode plate 16 and the negative electrode plate 18 are wound with the separator 20 interposed therebetween is formed, the negative electrode lead 24 of the negative electrode plate 18 is interposed with the lower insulating plate 40 interposed therebetween. It is bent toward the center of the winding group 14 (FIG. 2).
Middle, see (a)).

The winding group 14 is inserted into the battery can 12, and an upper insulating plate 42 is provided on the side of the opening 12a of the battery can 12 ((b), (c) in FIG. 2). reference).
At this time, the negative electrode lead 24 of the winding group 14 contacts the inner bottom portion 12b of the battery can 12, while the positive electrode lead 22 protrudes outward from the opening 12a of the battery can 12.

Next, the negative electrode lead 24 of the winding group 14 is spot-welded to the inner bottom 12b of the battery can 12,
After the annular groove 38 is formed in the vicinity of the opening 12a of the battery can 12, the electrolyte is injected into the battery can 12 via the electrolyte injection means 44 as shown in FIG. Liquid. Further, as shown in FIG. 2E, the sealing unit 26 is welded to the positive electrode lead 22 of the winding group 14.

As shown in FIG. 1, the sealing unit 26 has a gasket 28 in which a sealing plate 30, a breaker 32, a PTC ring 34, and a cap member 36, which are various sealing components, are laminated and integrally integrated. Have been.
Then, the positive electrode lead 22 is welded to the sealing plate 30 by, for example, laser welding.

The sealing unit constituting the sealing unit 26 includes at least a sealing plate 30 and a cap member 36 which are welded to the positive electrode lead 22, and includes a breaker 32 and a PTC ring 34 as required. Various sealing parts are incorporated.

After the positive electrode lead 22 is welded to the sealing unit 26, the positive electrode lead 22 is folded so that
The sealing unit 26 is disposed so as to be supported by an inner wall portion of the annular groove 38 of the battery can 12 ((f) in FIG. 2).
reference).

Next, an end portion of the battery can 12 on the side of the opening 12a is subjected to a sealing and caulking process, whereby a battery 10 as a product is manufactured (see (g) and (h) in FIG. 2). .
In transport and processing between these steps, the battery 10
Is carried out in a state of being accommodated in a transport jig described later.

The inspection system 100 according to the present embodiment includes the battery 10 in which the end of the battery can 12 on the side of the opening 12a is sealed or caulked, or the winding group 14 in the battery 10 which is a product. The winding deviation and the bent state of the positive electrode lead 22 are inspected.

More specifically, as shown in FIG. 3, the winding deviation inspection is to check whether or not the end of the positive electrode plate 16 protrudes from the end of the negative electrode plate 18. The bending state inspection is to check whether the bent part of the positive electrode lead 22 is close to the battery can 12. Since the separator 20 transmits X-rays,
Does not appear as a perspective image.

Next, the inspection system 1 according to the present embodiment
00 will be described with reference to FIG. The inspection system 100 according to the embodiment includes a transport conveyor 102 that transports the battery 10 in one direction, a battery loading mechanism 106 that loads the battery 10 transported through the transport conveyor 102 into a rotary transport unit 104 described below, An inspection unit 108 for performing a predetermined inspection (inspection of winding deviation of the winding group 14 and an inspection of a bent state of the positive electrode lead 22) on the battery 10 being transported by the rotary transport unit 104; 10, a defective product processing unit 110 that collects the battery 10 that has been recognized as a defective product, and a battery 10 that has completed a predetermined inspection.
The battery 10 that has been certified as a non-defective product is transported again to the conveyor 10
A non-defective product processing unit 112 which is fed to the second process and transported to the next process;
And a selection unit 114 that accumulates the inspection results of the inspection unit 108 and outputs the inspection results when necessary.

Battery 1 conveyed by conveyor 102
0 is housed in a transfer jig 200 and transferred as shown in FIGS. 5 and 6.

The transport jig 200 has a main body 202 having a substantially cylindrical shape, and a pair of parallel flat surfaces 206 a and 206 b slidably supported by a guide 204 of the conveyor 102 on the outer peripheral portion of the main body 202. A groove 208 is formed in the circumferential direction as necessary. An arrangement hole 210 for a battery can is formed in the axial direction of the transport jig body 202, and a spot welding insertion hole 212 communicates with the bottom side of the arrangement hole 210.

Holes 214a to 214d communicating with the bottom side of the arrangement hole 210 are formed in the conveying jig body 202 at a distance of 90 ° from the outer peripheral side.
a to 214d include permanent magnets 216a to prevent rotation of the battery can.
216d is mounted. Further, the transfer jig body 202
Is made of a resin material that transmits X-rays, and is made of polyethylene in this example.

Therefore, in this embodiment, the transfer jig 2
00 moves the planes 206a and 206b to the conveyor 10
While being slidably supported by the second guide 204 and conveyed,
The battery can 12 has a permanent magnet 216 a
It is held non-rotatable by the magnetic force of ２216d.

As a result, the battery can 12 is always held in a predetermined direction and is sequentially transported to the respective steps shown in FIG. 2, so that an annular groove 38 is formed in the battery can 12, The operation of injecting the electrolyte into the inside, the operation of folding the positive electrode lead 22, and the inspection process described later are smoothly and easily performed.

The rotary transport section 104 includes an index table 300 having a substantially circular planar shape, and a rotary drive mechanism 30 for intermittently rotating the index table 300 in one direction.
2 and the index table 30
A plurality of stations are arranged at substantially equal pitches on the same circumference on the outer peripheral portion at 0. Each station is provided with a gripping mechanism (not shown) for gripping the transport jig 200.

The index table 300 temporarily stops each time each station reaches the battery insertion position P1. During this stop period, the index table 300 is located at the inspection position P2 set on the opposite side of the battery insertion position P1.
Inspection processing to be described later is performed.

The battery loading mechanism 106 is constituted by a reciprocating mechanism such as an air cylinder, for example.
The jig 200 (containing the battery 10) conveyed through is supplied to an empty station stopped at the battery insertion position P1. At this time, in the empty station at the battery charging position P1, the transport jig 200 loaded by the battery loading mechanism 106 is gripped and fixed in a loaded state by a gripping mechanism (not shown).

The inspection unit 108 includes a first X-ray source 310 for irradiating the upper part of the battery 10 accommodated in the transport jig 200 stopped at the inspection position P2 with X-rays, and the first X-ray source 310. A first imaging camera 312 for capturing a fluoroscopic image of the upper part of the battery 10 formed based on the transmission and non-transmission of the X-rays emitted from the radiation source 310, and the transport jig 200 stopped at the inspection position P2. X-ray source 314 for irradiating X-rays to the lower part of battery 10 housed in
Imaging camera 316 that captures a perspective image of the lower part of battery 10 formed based on the transmission and non-transmission of X-rays emitted from X-ray, and first and second imaging cameras 312 and 31
The display device 318 includes a display device 318 that displays the image captured in Step 6 and an image processing device 320 that processes the captured image to determine whether the battery 10 is in the inspection process.

In particular, the first X-ray source 310 is installed so that the optical axis of the emitted X-ray substantially coincides with the radial direction of the index table 300. This is advantageous in the following cases.

That is, when the sealing unit 26 is attached to the opening 12 a of the battery can 12, for example, as shown in FIG.
The sealing unit 26 is supported by the inner wall of the annular groove 38 of the battery can 12. At this time, the extending direction of the positive electrode lead 22 (the extending direction when viewed in a plan view) is When the battery 10 reaches the inspection position on the index table 300, the extending direction of the positive electrode lead 22 substantially matches the tangential direction of the index table 300.

This is because the rotation and vibration associated with the transport of the battery 10 are caused by the permanent magnets 216 a to 216 a attached to the transport jig 200.
If the extending direction of the positive electrode lead 22 is made substantially coincident with the transporting direction of the transporting conveyor 102, when the battery 10 reaches the battery insertion position P1, an empty The extension direction of the positive electrode lead 22 and the transport direction of the transport conveyer 102 are maintained at both the stage of being loaded into the station and the stage of reaching the inspection position P2. That is, the positive electrode lead 2 in the mounting stage of the sealing unit 26 is
2 will be maintained as it is.

As a result, images captured by the first image capturing camera 312 displayed through the display device 318 include:
As shown in FIG. 3, the winding group 14 in the upper part of the battery 10
And the bent state of the positive electrode lead 22 are clearly shown.

The winding misalignment inspection and the bending state inspection of the positive electrode lead 22 are performed by the first and second imaging cameras 31.
2 and 316 are displayed on the display device 318.
At the same time, the winding state and the bending state of the positive electrode lead 22 are automatically determined through the image processing device 320.

Here, the discrimination processing in the image processing device 320 will be described. First, in the winding deviation inspection, a winding deviation inspection window W1 is displayed in the winding group portion in FIG.
The height of the vertex of each negative electrode plate 18 included in the inspection window W1 is detected one by one. Thereafter, the height of the apex of the positive electrode plate 16 sandwiched between the negative electrode plates 18 is detected one by one. Next, from these detection results, the difference between the heights of the adjacent positive electrode plate 16 and negative electrode plate 18 is calculated. If it is determined from the obtained difference that the positive electrode plate 16 is higher than the adjacent negative electrode plate 18 (if it protrudes), it is determined to be defective, otherwise (the negative electrode plate 18 is higher than the adjacent positive electrode plate 16). B), it is determined as a good product.

On the other hand, the bending state inspection of the positive electrode lead 22
An inspection window W2 is displayed at the bent portion of the positive electrode lead 22 in FIG. 3, and the innermost peripheral point Q of the inner wall in the annular groove 38 of the battery can 12 included in the inspection window W2.
1 is detected. Thereafter, the outermost point Q2 of the bent portion of the positive electrode lead 22 is detected. Next, a gap d between the positive electrode lead 22 and the battery can 12 is calculated from these detection results. If it is determined that the obtained gap d is equal to or larger than the set value (for example, 1 mm), it is determined that the product is good. If the gap d is smaller than the set value, it is determined that the product is defective.

If the battery 10 in the inspection process is determined to be non-defective by the automatic discrimination, a code indicating a non-defective product is output through the image processing device 320, and it is determined that the battery 10 in the inspection process is defective. If it is determined, a code indicating a defective product is output through the image processing device 320. The data indicating these non-defective products and non-defective products is stored in the sorting
14.

The selection unit 114 has a memory (not shown) inside, and is configured to register and manage the supplied data in the memory for each lot number of the battery 10, for example. The sorting unit 114 is configured to output an activation signal to the defective product processing unit 110 when the battery 10 determined to be defective reaches the defective product processing position P3.

The defective product processing unit 110 transports the battery 10 to a predetermined defective product processing position P3,
When the start signal is input from the controller, the battery 10 located at the defective product processing position P3 is taken out and the defective product conveyor 3
30 has an unloading mechanism 332. A collection box 334 is provided at the end of the defective product conveyor 330, and all the batteries 10 determined to be defective are collected in the collection box 334.

The non-defective product processing section 112 has a take-out mechanism 338 for taking out the battery 10 transported to a predetermined non-defective product processing position P4 and feeding the battery 10 to the non-defective product conveyor 336. The end of the non-defective transfer conveyor 336 is connected to the transfer conveyor 102 between the above-described steps, so that only the battery 10 determined to be non-defective is transferred to the next step.

Here, the processing in the inspection section 108 will be described. When the transport jig 200 containing the battery 10 arrives at the inspection position P 2 with the rotation of the index table 300, the index table 300 is rotated through the rotation drive mechanism 302. Is stopped. From this stage, the inspection of the winding deviation and the bending state of the positive electrode lead 22 by the inspection unit 108 are performed.

That is, X-rays are emitted from the first X-ray source 310, and X-rays are irradiated on the upper part of the battery 10 housed in the transfer jig 200. The first perspective camera 312 captures a perspective image based on the image.
At the same time, X-rays are emitted from the second X-ray source 314, and the lower part of the battery 10 housed in the transport jig 200 is irradiated with X-rays. The image is captured by the second imaging camera 316.

That is, the perspective image of the upper part of the battery 10 is the first
, And a perspective image of the lower part of the battery 10 is captured by the second imaging camera 316. The captured fluoroscopic image is displayed on the screen of the display device 318 and sent to the subsequent image processing device 320 at the same time, and the winding deviation state and the bending state of the positive electrode lead 22 are automatically determined. The inspection result obtained by the automatic determination is supplied to the selection unit 114 via the image processing device 320.

When the rotation of the index table 300 is resumed and the battery 10 reaches the defective product processing position P3 and no activation signal is output from the selection unit 114,
Since the battery is determined as a non-defective product, the predetermined process in the defective product processing unit 110 is not performed, and the battery 10 is held and fixed to the station as it is. In this case, the battery 1
The “0” is fed into the transport conveyor 102 again through the subsequent non-defective processing section 112 and transported to the next process.

On the other hand, when the starting signal is output from the sorting unit 114 when the battery 10 reaches the defective product processing position P3, it is determined that the battery 10 is defective. It will be collected in the collection box 334.

As described above, in the inspection system 100 according to the present embodiment, the winding deviation of the winding group 14 can be inspected based on the perspective images of the upper part and the lower part of the battery 10. Accuracy can be greatly improved as compared with the related art. In addition, the subsequent manual inspection by the operator can be omitted, so that the inspection process can be simplified.

Further, in this embodiment, the battery 1
0 is provided with a transport jig 200 for holding its axis in the vertical direction, and a transport conveyor 102 and a rotary transport unit 104 for transporting the transport jig 200 to the inspection position P2. The battery 10 is transported in a state where the axis is along the vertical direction, so that an upper perspective image and a lower perspective image of the battery 10 can be easily captured.

In particular, in this embodiment, since the main body 202 of the transfer jig 200 is made of a material through which X-rays as inspection light are transmitted, a see-through image below the battery 10 is sharp. Imaging can be performed, and inspection accuracy can be improved.

Further, in the present embodiment, an index table 300 having a substantially circular flat shape and a rotary drive mechanism 302 for rotating the index table 300 in one direction are provided. First and second imaging cameras 316 and 316 are used to convert the perspective images at the top and bottom, respectively,
, The upper perspective image and the lower perspective image of the battery 10 can be captured at the same time, and the efficiency of the winding deviation inspection can be improved.

In the present embodiment, the battery 10 is transported so that the phase of the positive electrode lead 22 from the reference position (the extending direction of the positive electrode lead 22) during assembly of the battery 10 is constant. The imaging camera 312 captures a perspective image of the positive electrode lead 22 together with the upper part of the battery 10,
The bending state of the positive electrode lead 22 is inspected together with the inspection of the winding deviation of the winding group 14.

In this case, the bending state of the positive electrode lead 22 can be inspected simultaneously with the winding deviation of the winding group 14, so that the efficiency of the inspection process of the battery 10 can be further improved, and the manufacturing cost can be reduced. It is advantageous for conversion. In particular,
The battery 10 is transported so that the phase of the positive electrode lead 22 from the reference position (the extending direction of the positive electrode lead 22) at the time of assembling the battery 10 is constant, and a perspective image of the positive electrode lead 22 is taken together with the upper part of the battery 10. Therefore, the bending state of the positive electrode lead 22 can be inspected with high accuracy and easily, and it is possible to minimize variations in accuracy between lots.

Particularly, in this embodiment, the transfer jig 200
Permanent magnets 216a to 216a for holding the battery 10 by suction
Since the battery 10 is mounted, the battery 10 can be transported so that the phase of the positive electrode lead 22 from the reference position at the time of assembling the battery 10 becomes constant, and the bent state of the positive electrode lead 22 is inspected. Can contribute to the improvement of the accuracy.

It should be noted that the battery inspection apparatus and inspection method according to the present invention are not limited to the above-described embodiment, but may employ various configurations without departing from the gist of the present invention.

[0079]

As described above, according to the battery inspection apparatus and method according to the present invention, the following effects can be achieved. (1) The winding deviation of the battery can be inspected with higher accuracy. (2) Manual inspection by the operator can be omitted, and the inspection process can be simplified. (3) It is possible to inspect the winding deviation of the battery and how the positive electrode lead is bent at the same time, and the efficiency of the inspection process can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a battery to which an inspection system according to an embodiment is applied.

FIG. 2 is a process chart showing a method for manufacturing a battery.

FIG. 3 is an explanatory diagram schematically showing a perspective image of an upper part of a battery.

FIG. 4 is a configuration diagram showing an inspection system according to the present embodiment.

FIG. 5 is a perspective view showing a transport jig used in the inspection system according to the present embodiment.

FIG. 6 is a vertical sectional view of a transfer jig.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Battery 12 ... Battery can 14 ... Winding group 16 ... Positive electrode plate 18 ... Negative electrode plate 20 ... Separator 22 ... Positive electrode lead 26 ... Sealing unit 100 ... Inspection system 102 ... Conveying conveyor 104 ... Rotary conveying part 106 ... Battery charging mechanism 108 ... Inspection unit 110 ... Defective product processing unit 112 ... Good product processing unit 114 ... Selection unit 200 ... Transport jigs 216a to 216d
.. Permanent magnet 300 index table 302 rotary drive mechanism 310 first X-ray source 312 first imaging camera 314 second X-ray source 316 second imaging camera

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G21K 4/00 G21K 4/00 H01M 6/02 H01M 6/02 A

Claims (11)

[Claims] 1. A battery for detecting a winding deviation of a battery containing a winding group formed by winding a band-shaped positive plate and a band-shaped negative plate in a battery can with a separator interposed therebetween. The inspection apparatus according to claim 1, further comprising: an imaging unit that captures a perspective image of the upper and lower parts of the battery based on transmission and non-transmission of inspection light to the upper part and lower part of the battery transported to a predetermined inspection position, Based on the perspective image captured by the imaging unit,
A battery inspection device for inspecting at least a winding deviation of the winding group. 2. The battery inspection apparatus according to claim 1, wherein a transport jig for holding the battery with its axis line extending in a vertical direction, and a transport for transporting the transport jig to the inspection position. And a battery inspection device. 3. The battery inspection device according to claim 2, wherein the transport jig is made of a material through which the inspection light is transmitted. 4. The battery inspection apparatus according to claim 2, wherein the transporting means has an index table having a substantially circular shape in a plane, and a rotation drive mechanism for rotating the index table in one direction. The image pickup means is the one in the index table.
An inspection apparatus for a battery, wherein perspective images of an upper portion and a lower portion of the battery are taken at one station. 5. The battery inspection device according to claim 2, wherein the transport unit transports the battery such that a phase of the positive electrode lead from a reference position during assembly of the battery is constant. The imaging means captures a perspective image of the positive electrode lead together with the upper part of the battery based on a fixed phase from a reference position of the positive electrode lead, and inspects the winding displacement of the winding group and the bending state of the positive electrode lead. A battery inspection device characterized by inspecting a battery. 6. The battery inspection apparatus according to claim 5, wherein a permanent magnet for attracting and holding the battery is mounted on a transport jig of the transport means. 7. The battery inspection apparatus according to claim 1, wherein the inspection light is an X-ray. 8. A battery for checking a winding deviation of a battery containing a winding group formed by winding a strip-shaped positive plate and a strip-shaped negative plate in a battery can with a separator interposed therebetween. In the inspection method of (1), a perspective image of the upper and lower parts of the battery is captured based on transmission and non-transmission of inspection light to an upper part and a lower part of the battery conveyed to a predetermined inspection position, and the perspective is taken. A battery inspection method characterized by inspecting at least a winding deviation of the winding group based on an image. 9. The battery inspection method according to claim 8, wherein the battery is transported to the inspection position while holding the battery with the axis thereof oriented vertically. 10. The battery inspection method according to claim 8, wherein the battery is transported such that the phase of the positive electrode lead from the reference position at the time of assembling the battery is constant. Based on a certain phase from the above, a perspective image of the positive electrode lead is taken together with the upper part of the battery, and the bending state of the positive electrode lead is inspected together with the inspection of the winding deviation of the winding group. Inspection methods. 11. The battery inspection method according to claim 8, wherein the inspection light is an X-ray.