JPH09320644A - Battery quality evaluating and sorting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery quality evaluating and sorting device which enables the impact test of batteries and measurement of its internal resistance to be performed through a series of processes and which holds the batteries in their positions after the impact test without inflicting any impact. SOLUTION: An impact test drum 14, which holds a plurality of batteries B along its outer peripheral surface with their longitudinal direction held horizontal, rotates continuously and imparts an impact force in the direction of its axis to the batteries B during its rotation. The impact force provides the batteries B with a predetermined energy stored in a spring 43 as the drum rotates. An internal resistance measuring drum rotates continuously in synchronization with the impact test drum 14, receives the batteries B from the impact test drum 14 while keeping their positions taken at the end of the impact test, and measures the internal resistance of each battery B to evaluate each battery for quality. A sorting drum rotates continuously in synchronization with the internal resistance measuring drum, and sorts out the batteries B received from the internal resistance measuring drum, according to the result of quality evaluation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention evaluates the connection condition and welding quality between a lead wire drawn from an electrode plate of an electrode group housed inside a battery case and the battery case, and based on the evaluation result, the battery is evaluated. The present invention relates to a battery quality evaluation and sorting device used for sorting.

[0002]

2. Description of the Related Art Generally, an alkaline storage battery or a lithium ion battery has a structure as shown in FIG. That is, an electrode group formed by spirally winding (sometimes laminated) the positive electrode plate 1 and the negative electrode plate 2 with the insulating separator 3 interposed therebetween is housed in the battery case 4, and the positive electrode The plate 1 is connected to a positive electrode terminal 8 via a positive electrode lead wire 7,
The negative electrode plate 2 is connected to the battery case 4 via a negative electrode lead wire 9. Here, as shown in FIG. 10, the negative electrode lead wire 9 is electrically insulated from the electrode group by the insulating plate 10, and is connected to the bottom portion of the battery case 4 by welding.

The connection state of the negative electrode lead wire 9 and the battery case 4 is evaluated by conducting a continuity test after the step of connecting the negative electrode lead wire 9 to the battery case 4. Alternatively, the assembled battery is specified using the inspection means modified so that the “drop test of a portable light source using a dry battery as a power source” defined in JIS can be applied to the evaluation of the connection state of the battery. The connection state is evaluated by dropping it from the height onto the specified floor surface.

[0004]

By the way, in the above-mentioned continuity inspection, it is possible to check the presence or absence of a leak defect after the connection between the battery case 4 and the negative electrode lead wire 9 and the rough welding state. However, in the battery as shown in FIGS. 9 and 10, even if welding between the battery case 4 and the negative electrode lead wire 9 is incomplete, the negative electrode lead wire 9 is pressed against the bottom of the battery case 4 by the electrode group. Therefore, it may not be possible to determine a defective product by a static continuity test.

Therefore, as described above, the battery is naturally dropped from the specified height onto the specified floor surface, and the battery is given an impact force such that its electrode group is displaced to the positive electrode terminal 8 side, and thereafter. In addition, a quality evaluation means for measuring the internal resistance of the battery is adopted. However, in the impact test of the battery due to the above free fall, a large number of man-hours are required for the inspection, and therefore it is not possible to inspect all the produced batteries, and only a limited number is inspected. . Therefore, since the number of batteries to be inspected is small, there is a problem in reliability of quality evaluation. Moreover, in the above-mentioned battery impact test, when measuring the internal resistance of the impacted battery, the battery can be changed in posture from the impact test,
In many cases, some kind of impact is applied again due to various causes, and the reliability of the quality evaluation is deteriorated also from this point.

Therefore, according to the present invention, the shock test and the internal resistance measurement of the battery can be carried out in a series of continuous steps, and moreover, the posture of the battery after the shock test can be maintained as it is and no It is an object of the present invention to provide a battery quality evaluation / sorting device that does not give a shock.

[0007]

In order to achieve the above object, a battery quality evaluation and sorting apparatus according to a first aspect of the present invention comprises a plurality of batteries arranged along an outer peripheral surface in a state where the longitudinal direction thereof is horizontally positioned. The drum for impact test, which continuously rotates while being held, and gives an impact force in the axial direction to the battery during the rotation, and the drum for impact test that continuously rotates in synchronization with the drum for impact test. While maintaining the posture at the end of the impact test, the internal resistance measuring drum for measuring the internal resistance of the battery to evaluate the quality of the battery, and the continuous rotation in synchronization with the internal resistance measuring drum And a sorting drum that sorts the batteries received from the internal resistance measuring drum based on the result of the quality evaluation.The impact testing drum stores a predetermined energy in a spring as the impact testing drum rotates. Together deflect until, when the battery reaches a predetermined position, it is configured to provide an impact force to the battery by a predetermined energy stored in the spring.

In the battery quality evaluation and sorting apparatus described above, the batteries are sequentially transferred to the impact test drum, the internal resistance measuring drum, and the sorting drum that rotate continuously, and in the process, the impact test and the internal resistance measurement are performed. Since the quality evaluation and the selection based on the evaluation are performed, the selection based on the quality evaluation can be performed very efficiently, and thus all the produced batteries can be inspected. Further, in the impact test, since the predetermined energy stored in the spring is applied to the battery as the impact test drum rotates, a constant impact force is always applied to the battery. further,
The battery is handed over to each drum while maintaining the longitudinal position of the battery horizontally, and no impact force is applied other than the impact test. These greatly improve the reliability of quality evaluation.

Further, in the preferred embodiment of the invention described above, a plurality of impact test drums are formed along the outer peripheral surface, and the batteries are sequentially arranged in a state in which the longitudinal direction of the battery is horizontally aligned with the rotation of the drums. A battery support base for receiving, a plunger for attracting the battery received by the battery support base by a magnet provided at the tip, and a direction in which the plunger is separated from the battery support base while engaging with a cam as the drum rotates. A cam follower to be moved, a pusher that is pressed by a battery that moves integrally with the plunger by attraction by the magnet and is moved in a direction away from the battery support base while bending the spring, and the spring is bent by a predetermined amount. When the pusher is in contact with the pusher, the pusher is provided with a stopper portion for preventing the pusher from moving, and a receiving member with which the battery collides. Spaced cells from said magnet by said from the time the movement of the pusher is stopped plunger continues to move, the battery is configured to impinge on the receiving member moving at high speed by the restoring force of the spring.

As a result, the structure of the first aspect of the invention can be easily realized and the desired effect can be obtained.

Further, in another preferred embodiment of the above-mentioned invention, a plurality of impact test drums are formed along the outer peripheral surface, and the longitudinal direction of the battery is positioned horizontally as the drums rotate. And a cam follower for bending the spring by moving the plunger while engaging with the cam as the drum rotates, and when the spring is bent by a predetermined amount, the cam follower The cam is disengaged and released, and the plunger moves at high speed by the restoring force of the spring to collide with the battery in its axial direction.

With this structure as well, the structure of the first invention can be easily realized and desired effects can be obtained.

In the battery quality evaluation and sorting apparatus according to the second aspect of the present invention, a plurality of batteries are continuously rotated while being held along the outer peripheral surface in a state where the longitudinal direction thereof is vertically positioned, and the batteries are continuously rotated during the rotation. On the other hand, the impact test unit that applies an impact force in the axial direction to the impact test unit, and while continuously rotating in synchronization with the impact test unit, receives the battery from the impact test unit while maintaining the posture at the end of the impact test, and Based on the result of the quality evaluation, an internal resistance measuring drum for measuring the resistance to evaluate the quality of the battery, and a battery received from the internal resistance measuring drum while continuously rotating in synchronization with the internal resistance measuring drum. The impact test section includes an upper table and a lower table that continuously rotate in synchronism while maintaining a predetermined interval, and a battery is placed in the upper table. A plurality of battery holding holes that are inserted and held in a state and a plurality of receiving pieces that are openable and closable with respect to the lower end opening of the battery holding holes are arranged along the outer peripheral surface. The guide part that guides the battery that naturally drops from the battery holding hole downwards by opening the battery holding hole, the battery insertion hole that receives the battery that has passed through this guide part, and the lower end opening of the battery insertion hole are closed. A plurality of receiving members that collide with the batteries that naturally fall are arranged along the outer peripheral surface.

In the above battery quality evaluation and sorting apparatus, the first
In addition to the effect of the invention described above, the structure can be simplified, and the effect that the adjustment and inspection of the impact force due to the fatigue of the spring becomes unnecessary is obtained.

In the battery quality evaluation and sorting apparatus according to the third aspect of the invention, the plurality of batteries are continuously rotated while being held along the outer peripheral surface in a state where the longitudinal direction thereof is vertically positioned, and the batteries are continuously rotated during the rotation. On the other hand, the impact test section for applying an impact force in the axial direction and the battery for receiving the battery from the impact test section while maintaining the posture at the end of the impact test while continuously rotating in synchronization with the impact test section. The internal resistance measuring drum for measuring the internal resistance to evaluate the quality of the battery, and the battery received from the internal resistance measuring drum while continuously rotating in synchronization with the internal resistance measuring drum is used as the result of the quality evaluation. A sorting drum for sorting based on the above, the impact test section, a cylindrical battery holder for holding the battery in a vertical state,
A plunger that is moved upward by a cam follower that engages with a cam as the impact test section rotates, and that inserts only the upper end of the battery into the lower end opening of the battery holder;
When the upper end of the battery is inserted into the lower end opening of the battery holder, the battery holder is connected to a vacuum circuit, and the battery holder is pulled up to the upper end of the battery holder by its suction force. The battery is switched and connected to a compressed air circuit, and the battery is vertically dropped in a pressurized state by compressed air to collide with the plunger.

In the above battery quality evaluation and sorting apparatus, the second
In addition to the effect of the invention described above, it is possible to obtain an effect that a shock test can be performed with high accuracy by applying a pressing force to the battery with compressed air without relying on only a natural fall.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view showing an overall schematic configuration of a battery quality evaluation / selection apparatus according to an embodiment of the present invention. In the figure, the battery B shown in FIGS. 9 and 10 is used. The battery B is supplied to the battery supply drum 12 by the transfer conveyor 11 in an inverted state with the shaft center horizontally. In the battery supply drum 12, battery holders 13 are formed at equal intervals on the peripheral surface of the disk body, and the battery B conveyed by the conveyor 11 is adsorbed and received by the battery holder 13 during rotation. Further, the battery B of the battery supply drum 12 is delivered to the battery support base 17 formed on the peripheral surface of the impact test drum 14 which continuously rotates at a constant speed. The impact test of the battery B is performed on the impact test drum 14 during rotation, and details thereof will be described later.

After the test, the battery B is delivered to the internal resistance measuring drum 19 through the battery intermediate delivery drum 18 with almost no change in its posture. The internal resistance measuring drum 19 can hold the same number of batteries B as the impact test drum 14 on the circumferential surface, and continuously rotates at the same speed as the impact test drum 14. During the rotation, the internal resistance of the battery B after the test is measured in the posture at that time and the internal resistance is measured, and it is sorted into the good product and the defective product based on the measurement result. The details will be described later. Battery B evaluated for quality
Is transferred to the selection drum 21 via the intermediate transfer drum 20, and the selection drum 21 is the internal resistance measurement drum 1
Based on the quality evaluation in 9, the non-defective battery B is supplied to the non-defective product conveyor 22 and the defective battery B is supplied to the defective product conveyor 23.

As is clear from the overall configuration of FIG. 1, the battery B always passes through a series of steps from the battery supply drum 12 to the conveyors 22 and 23 with the axis thereof oriented horizontally. Therefore, it is possible to measure the internal resistance of the battery B, which has been subjected to the impact test with the impact test drum 14, while maintaining the posture as it is, and to apply some impact to the battery B after the impact test is completed. Never add. Therefore, the reliability of the quality evaluation of the battery B is high, and furthermore, the battery B is installed in each drum 12, 14, 18, 19, 2.
Since the impact test, the internal resistance measurement and the evaluation judgment are performed during the rotation while continuously transferring by 0, 21, it is extremely efficient, and the 100% inspection of the battery B is also possible.

FIG. 2 is a cutaway side view of a half portion showing the impact test drum 14. This impact test drum 14 is
A drum shaft 28 rotatably supported on the holding cylinder 24 via a ball bearing 27 is continuously rotated at a constant speed by a rotary drive source, and the following mechanism is rotated by the drum shaft 28. Multiple along the outer peripheral surface (18 in Fig. 1)
The battery supporting base 17 provided has a semicircular cross section in which a half portion of the battery B can be fitted and held. Battery support 1
7, a plunger 30 is slidably fitted in a guide hole 31 of a drum housing 29 arranged in proximity to the drum housing 29.
2 is embedded and fixed in proximity to the battery support 17.

A cam follower pin 34 is fixed to the base portion 33 of the plunger 30, and a cam follower 37 at the tip of the cam follower pin 34 is engaged with a cam 38 provided so as to surround the outer peripheral surface of the drum main body portion. This cam 38
Is the plunger 3 as the impact test drum 14 rotates.
Although it has a cam curve that moves 0 to the left in FIG. 2 by a predetermined distance and then returns it to the origin position shown in FIG. 2, it is a well-known shape, so its illustration is omitted.

A guide hole 31 is provided in the drum housing 29.
On the other hand, a small-diameter hole portion 39 and a large-diameter hole portion 40 having a diameter larger than that of the guide hole 31 are continuously provided at a position near the battery support stand 17, and a step portion between the both hole portions 39 and 40 is formed by a pusher 42 described later. Is the stopper surface 41. Pusher 4 above
2 has a shape in which cylindrical portions having different diameters are continuously provided, and an outer surface step portion between the two types of cylindrical portions serves as a locking surface 44. The pusher 42 is slidably fitted on the outer peripheral surface of the plunger 30 and at the same time the plunger 3
0 is inserted, and the compression coil spring 43 interposed between the drum housing 29 and the pusher 42 is constantly urged in the direction of the battery support stand 17, so that the locking surface 44 of the O-ring 4 moves.
It comes into contact with the stopper member 48 via 7 and stands still.
However, FIG. 2 shows a case where the cam follower 37 is located at the origin of the cam 38, and the pusher 42 is moved to the left in FIG. 2 as the impact test drum 14 rotates from the above state. The locking surface 44 is separated from the O-ring 47.

A receiving block 50 is attached to the side wall member 49 fixed to the side surface of the battery supporting base 17 so that the receiving block 50 is provided.
Is mounted close to. As is apparent from FIG. 1, a plurality of (18 in the figure as an example) battery support bases 17 are arranged at equal intervals on the outer peripheral surface of the impact test drum 14, and each of these battery support bases 17 is arranged. 2 includes the plunger 30, pusher 42 and cam follower 3 shown in FIG.
Mechanisms such as 7 are provided so as to face each other.

Next, the operation of the impact test drum 14 will be described with reference to FIGS. 3 (a) to 3 (c).
FIG. 2 shows the position where the battery support stand 17 has reached the origin position, that is, the position closest to the battery supply drum 12 and capable of receiving the battery B as the impact test drum 14 rotates. 30 moves to the rightmost position in FIG. 2 and the permanent magnet 32 is close to the battery support base 17. At this time, the battery B held in the battery holder 13 of the battery supply drum 12 receives the positive electrode terminal 8 of the battery B.
It is transferred to the battery support stand 17 in a state of being horizontally positioned toward the 0 side. Almost at the same time, the battery B has a permanent magnet 3
Is attracted to the plunger 30 side by the suction force of 2,
The bottom surface of the battery case 4 is held by being attracted to the permanent magnet and in contact with the end surface of the pusher 42.

Next, as the impact test drum 14 rotates, the cam follower 37 engages with the cam 38, and the plunger 30 moves through the cam follower pin 34 into the battery support 1.
It is moved in the direction away from 7. At this time, the battery B attracted to the permanent magnet 32 at the tip of the plunger 30
Moves together with the plunger 30, and pushes the pusher 42 from its end surface to move integrally. As the pusher 42 moves, the compression coil spring 4
3 is compressed. Then, when the compression coil spring 43 is compressed to a predetermined size and the required energy is stored, as shown in FIG. 3A, the pusher 42 moves with the left end surface in the drawing contacting the stopper surface 41. Be blocked.

When the plunger 30 is further moved from the above state and reaches the left limit position shown in FIG. 3B, the battery B, which is prevented from moving by the pusher 42, is separated from the permanent magnet 32. , It is released from the suction force. At that time, the battery B receives the energy due to the restoring force of the compression coil spring 43 through the pusher 42 and moves to the battery support stand 17 side at a high speed together with the pusher 42, as shown in FIG. , Collides with the receiving member 50. At this time, the pusher 42 integrally moves the battery B, but immediately before the battery B collides with the receiving member 50, the pusher 42 contacts the stopper member 48 via the O-ring 47 and stops. Therefore, the battery B alone collides with the receiving member 50.

Since the battery B collides with the receiving member 50 from the positive electrode terminal 8 side, at the moment when the battery B collides with the receiving member 50, the electrode group housed in the battery case 4 of the battery B due to inertia. It is slightly displaced to the positive electrode terminal 8 side. As a result, the negative electrode lead wire 9 cannot be pressed against the bottom surface of the battery case 4 by the electrode group. Therefore, if the internal resistance of the battery B is measured in this state, the negative electrode lead wire 9 and the battery case 4 are not measured. It is possible to accurately evaluate the welding state and the like, and it is possible to obtain much higher reliability than in the case where the internal resistance of the battery B is measured in a static state and the quality is evaluated.

According to the experimental result of the impact test of the battery B by the impact test drum 14, the compression coil spring 43 made of the stainless steel wire for the spring having the diameter of 2 mm is used, and when the compression coil spring 43 is compressed by about 16 mm, it becomes permanent. When the magnet 32 was set to be separated from the battery B, the battery B moved at a speed of 2.4 m / sec and collided with the receiving member 50. Further, if the maximum torsional stress received during compression is set to about 10 kgf / mm ² , the compression coil spring 43 is considerably lower than the fatigue limit of the spring, so that it is hardly fatigued, and the impact force of the battery B varies due to fatigue. Hardly occurs. Further, it is preferable to use a rare earth magnet or an alnico magnet as the permanent magnet 32, because the battery B can be delivered and received by a strong attractive force without changing its posture. The impact force applied to the battery B needs to be set to a value that can accurately evaluate the welding condition between the negative electrode lead wire 9 and the battery case 4 within a range in which the battery case 4 is not deformed to the extent of being defective.

As a means similar to the above-described collision test of the battery B, the battery B is statically supported on the impact test drum, and the cam follower 3 connected to the plunger 30 is used.
7 and the cam 38 are used to compress the compression coil spring with the rotation of the impact test drum, and when a predetermined energy is stored in the compression coil spring, the cam follower is engaged with the cam. By releasing and opening, the plunger can be moved at high speed by the restoring force of the compression coil spring to collide with the positive electrode terminal 8 side of the battery B.

Next, as shown in FIG. 1, the battery B subjected to the impact test on the impact test drum 14 is supplied to the internal resistance measuring drum 19 via the battery intermediate transfer drum 18. FIG. 4 shows a cutaway side view of a half of the internal resistance measuring drum 19. In the figure, the battery B is received and held on the battery support base 51 while maintaining the posture at the end of the impact test. The measurement of the internal resistance of the battery B is performed by using the four-terminal measuring method with the four measuring terminals 52, 53, 54 and 57, whereby the measuring terminal 52,
The error caused in the measured value due to the influence of the contact resistance between 53, 54, 57 and the battery B can be minimized. The measurement terminal 52 on the left side of the drawing is urged by the spring 58 and comes into contact with the fixed terminal 53 on the bottom surface of the battery case 4 of the battery B on the battery support 51. On the other hand, the pair of measuring terminals 54, 57 on the right side of the figure are displaced to the left side of the figure by the engagement of the cam follower (not shown) and the cam with the rotation of the internal resistance measuring drum 19, and the coil springs 59, 60 are displaced. It is pressed against the positive electrode terminal 8 side of the battery case 4 by the urging force. Each measurement terminal 52, 53, 54, 57 is connected to a resistor (not shown) via a measurement line 61, and the internal resistance measured by the resistor is, for example, 100 mΩ or less as a good product, and more as a defective product. To be evaluated.

The battery B supplied from the internal resistance measuring drum 19 to the sorting drum 21 through the battery intermediate transfer drum 20 is based on the result of quality evaluation based on the internal resistance measurement value in the internal resistance measuring drum 19. It is sent to the next process by the non-defective item conveyer 22 or the defective item conveyer 23. In the sorting means based on the quality evaluation of the battery B described above, after the battery B is appropriately shocked, it is possible to maintain the posture as it is and measure the internal resistance without applying any shock. Highly reliable. Moreover, the battery B is connected to the rotating drums 12, 14, 18,
Since the impact test and the measurement of the internal resistance are performed while being continuously transferred by 19, 20, and 21, it is possible to select all the batteries B by quality evaluation. Moreover, when the impact test is performed by the impact test drum 14 in the direction in which the electrode group and the battery case are in close contact, there is an advantage that the adhesion between the electrode group and the battery case 4 is improved and the internal resistance of the battery is reduced. .

By the way, in the case where the quality of the battery B is evaluated by applying the impact force as described above, the impact force set as the impact test condition must be stable for a long period of time without change or variation. Therefore, a means for confirming the impact force is required. The confirmation can be performed by the following means. That is, the receiving member 50
Instead, a test piece having the same shape as the receiving member 50 and having a low carbon steel material adjusted to a predetermined hardness by refining is attached to the side wall member 49. On the other hand, instead of the battery B, a dummy battery 63 as shown in FIG. 5 is used. This dummy battery 63
Has the same size, shape, mass and friction resistance as the battery B to be quality evaluated, and MC nylon 67 is filled in the lower inner part of the case 64.
A headed cylindrical collision member 6 is formed by heat-treating an SKD material having excellent wear resistance and having a hardness of about HRC62.
8 is built in, and a sharpened collision piece 69 formed on the collision member 68 is projected from the heat-shrinkable tube 70 as an exterior body to the outside.

Therefore, the dummy battery 63 is held on the battery support 17 with the collision piece 69 facing the test piece, and the dummy battery 63 collides with the test piece in the same manner as described above. As a result, a small circular recess is formed on the test piece due to the collision of the collision piece 69. Therefore, if the diameters of the recesses in two directions orthogonal to each other are measured with a microscope or the like, the impact force on the impact test drum 14 can be determined. Can be measured. The relationship between the amount of flexure of the compression coil spring 43 and the diameter of the depression, which is the result of the experiment, is shown in FIG. The impact force can be confirmed by checking the size of the diameter of the recess formed in the test piece, and the impact force can be appropriately adjusted by adjusting the compression coil spring 43 and the like. For comparison, FIG. 6B shows an experimental result of a conventional impact test by natural dropping using the above-mentioned test piece and the dummy battery 63. The method causes variations in impact force.

FIG. 7 is a vertical cross-sectional view of an essential part of the impact test section 71 in the battery quality evaluation and sorting apparatus according to another embodiment of the present invention. In the figure, the disk-shaped upper and lower tables 72 and 73 facing each other in parallel are continuously rotated in synchronization while maintaining a constant interval. A plurality of battery holding holes 74 are formed along the outer periphery of the upper table 72. The battery B is inserted into the battery holding hole 74 with the positive electrode terminal 8 facing downward, and the battery holding hole 74 It is supported by a receiving piece 77 provided in the lower opening and held in the battery holding hole 74 in a vertical state. Both tables 72, 73
When the battery holding hole 74 reaches a predetermined position due to the rotation of, the receiving piece 77 is rotated about a support shaft (not shown) by its outer tip end contacting a not-shown locking piece. It moves to be separated from the battery holding hole 74 instantaneously. Thereby, the battery B is provided so as to naturally fall while maintaining the vertical state when being supplied to the upper table 72 by the guide pipe 78, and to close the lower end opening of the battery insertion hole 79 of the lower table 73. It collides with the receiving member 80.

After that, the battery B is supplied to an internal resistance measuring table (not shown) while maintaining the vertical state after the impact test, and the internal resistance is measured to evaluate the quality. In the above-mentioned impact test unit 71, since the impact force is applied to the battery B by dropping it naturally, it is hardly affected by friction and wear, and adjustment is required due to fatigue of the spring 43 in the impact test table 14 in FIG. Since it is unnecessary, stable impact force can be obtained for a long period of time to perform highly accurate quality evaluation. Moreover, there is an advantage that the entire configuration can be simplified.

FIG. 8 is a vertical cross-sectional view of a main part of an impact test section 81 in a battery quality evaluation and sorting apparatus according to still another embodiment of the present invention. The external force caused by the above gives an impact force to the battery B. In the figure, a plunger 89 to which a cam follower pin 88 of a cam follower 87 that engages with a cam 84 is fixed is held in a vertically movable manner on the impact test drum 82 that continuously rotates around the drum shaft 83.
The plunger 89 is pushed up by the engagement of the cam follower 87 with the cam 84 in accordance with the rotation of the impact test drum 82, so that the battery B held on the battery support 90 is held at the lower end of the cylindrical cylindrical battery holder 91. Push up until it slightly faces the opening.

The battery holder 91 has piping portions 92 and 93.
And a vacuum circuit to a vacuum pump (not shown) and a compressed air circuit to an air compressor (not shown) via the valve section 94, respectively, and with the rotation of the impact test drum 82. The valve section 94 selectively switches and connects the vacuum circuit and the compressed air circuit at a predetermined timing described later. When the above-mentioned plunger 89 is pushed up, the battery holder 91
Is connected to a vacuum circuit, and the battery B is pushed up until it slightly faces the opening at the lower end of the battery holder 91. The battery B is held by the battery holder 9 as indicated by the chain double-dashed line in FIG.
1 is pulled up to the upper end. When the impact test drum 82 rotates from this state by a predetermined angle, the valve circuit 94 switches the vacuum circuit to the compressed air circuit. As a result, the compressed air set to the predetermined pressure is instantaneously introduced into the battery holder 91, so that the battery B is given downward energy by the compressed air and the plunger installed concentrically with the battery holder 91. Hit on 89.

The mechanism shown in FIG. 8, that is, the battery support 90, the plunger 89 to which the cam follower pin 88 is connected, and the battery holder 91 are arranged along the outer circumference of the impact test drum 82. , Each battery holder 9
1 is individually connected to the vacuum circuit and the compressed air circuit, respectively.

[0039]

As described above, according to the battery quality evaluation / sorting apparatus of the first invention, sorting by battery quality evaluation can be performed very efficiently, and 100% inspection is performed on the produced batteries. It is also possible to do it. In the impact test, the predetermined energy stored in the spring is applied to the batteries as the impact test drums rotate, and the batteries are handed over to each drum while keeping its longitudinal position horizontal. In addition to being able to perform 100% inspection, since no impact force is applied other than the impact test,
The reliability of battery quality evaluation is significantly improved.

According to the battery quality evaluation / selection apparatus of the second invention, in addition to the effects of the first invention, the structure can be simplified, and the impact force due to the fatigue of the spring can be adjusted or inspected. The effect that is unnecessary can be obtained.

According to the battery quality evaluation / selection apparatus of the third invention, in addition to the effects of the second invention,
It is possible to obtain an effect that the impact test can be performed with high accuracy by applying a pressing force with compressed air without relying on only natural fall.

[Brief description of drawings]

FIG. 1 is a schematic front view showing a battery quality evaluation and sorting apparatus according to an embodiment of the present invention.

FIG. 2 is a cut side view of a half portion showing an impact test drum in the same apparatus.

3A to 3C are sectional side views sequentially showing the operation of the drum.

FIG. 4 is a half cutaway side view showing an internal resistance measuring drum in the same apparatus.

FIG. 5 is a vertical cross-sectional view of a dummy battery used in a test for confirming an impact force in the same device.

FIG. 6A is a characteristic diagram showing a result of a test of impact force in the same apparatus, and FIG. 6B is a characteristic diagram of an impact force by a conventional means for giving an impact force shown for comparison.

FIG. 7 is a vertical cross-sectional view of a main part showing an impact test part in a battery quality evaluation and selection device according to another embodiment of the present invention.

FIG. 8 is a half cutaway side view showing an impact test section in a battery quality evaluation and sorting apparatus according to still another embodiment of the present invention.

FIG. 9 is a perspective view showing a battery that can be evaluated and selected by the apparatus of the present invention and cut and developed.

FIG. 10 is a perspective view of the battery as seen from below with a part thereof broken away.

[Explanation of symbols]

 14 Impact Test Drum 17 Battery Support 19 Internal Resistance Measurement Drum 21 Selection Drum 30 Plunger 32 Permanent Magnet 34 Cam Follower Pin 37 Cam Follower 38 Cam 41 Stopper Surface (Stopper) 42 Pusher 43 Compression Coil Spring (Spring) 50 Receiving Member 71 Impact Test part 72 Upper table 73 Lower table 74 Battery holding hole 77 Receiving piece 78 Guide pipe (guide part) 79 Battery insertion hole 80 Receiving member 81 Impact test part 84 Cam 87 Cam follower 89 Plunger B battery

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sadanobu Umeda 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A plurality of batteries are continuously rotated while being held along the outer peripheral surface in a state in which the longitudinal direction of the batteries is horizontally positioned,
The impact test drum that applies an impact force in the axial direction to the battery during its rotation, and the battery at the end of the impact test from the impact test drum while continuously rotating in synchronization with the impact test drum. Received from the internal resistance measuring drum while keeping the same and measuring the internal resistance of the battery to evaluate the quality of the battery, and the internal resistance measuring drum while continuously rotating in synchronization with the internal resistance measuring drum. The impact test drum is provided with a sorting drum that sorts the battery based on the result of the quality evaluation, and the impact test drum bends the spring along with the rotation until a predetermined energy is stored, and the battery reaches a predetermined position. Sometimes, the battery quality evaluation device is configured to give an impact force to the battery by the predetermined energy accumulated in the spring. 2. A battery support base formed on the impact test drum along the outer peripheral surface thereof, and sequentially receiving batteries in accordance with rotation of the drum in a state in which the longitudinal direction of the drum is horizontally positioned, and the battery support. A plunger that attracts the battery received on the table by a magnet provided at the tip, a cam follower that moves the plunger in a direction away from the battery support table while engaging with a cam as the drum rotates, and an attraction by the magnet The pusher is pressed by a battery that moves integrally with the plunger to move in a direction away from the battery support while bending the spring, and the pusher comes into contact when the spring is bent by a predetermined amount. And a stopper member for preventing movement of the pusher and a receiving member with which the battery collides, and from the time when the movement of the pusher is stopped. The battery quality evaluation selection according to claim 1, wherein the battery is separated from the magnet as the plunger continues to move, and the battery is moved at high speed by the restoring force of the spring and collides with the receiving member. apparatus. 3. An impact test drum, a plurality of which are formed along an outer peripheral surface of the drum, and which sequentially receive batteries with rotation of the drum in a state where a longitudinal direction of the drum is horizontally positioned; A cam follower that bends the spring by moving the plunger while engaging the cam with rotation, and when the spring is bent by a predetermined amount, the cam follower is disengaged from the cam and released. The battery quality evaluation / selection device according to claim 1, wherein the plunger is configured to move at high speed by the restoring force of the spring and collide with the battery in the axial direction thereof. 4. A plurality of batteries are continuously rotated while being held along the outer peripheral surface in a state where the longitudinal direction of the plurality of batteries is vertically positioned,
An impact test unit that applies an impact force in the axial direction to the battery during its rotation, and a battery from the impact test unit that maintains the posture at the end of the impact test while continuously rotating in synchronization with the impact test unit. The internal resistance measuring drum that receives and measures the internal resistance of the battery to evaluate the quality of the battery; and the battery that is received from the internal resistance measuring drum while continuously rotating in synchronization with the internal resistance measuring drum. The impact test section includes an upper table and a lower table that continuously rotate in synchronization while maintaining a predetermined interval, and a battery is vertically mounted on the upper table. A plurality of battery holding holes that are inserted and held in a state and a plurality of receiving pieces that can be opened and closed with respect to the lower end opening of the battery holding holes are arranged along the outer peripheral surface. The battery has a guide portion for guiding a battery that naturally falls from the battery holding hole downward by opening the receiving piece while keeping the vertical position, a battery insertion hole for receiving the battery passing through the guide portion, and a battery insertion hole. A battery quality evaluation device characterized in that a plurality of receiving members for closing a lower end opening of a hole and colliding a battery that naturally falls are arranged along an outer peripheral surface. 5. A plurality of batteries are continuously rotated while being held along the outer peripheral surface in a state where the longitudinal direction of the plurality of batteries is vertically positioned,
An impact test unit that applies an impact force in the axial direction to the battery during its rotation, and a battery from the impact test unit that maintains the posture at the end of the impact test while continuously rotating in synchronization with the impact test unit. The internal resistance measuring drum that receives and measures the internal resistance of the battery to evaluate the quality of the battery; and the battery that is received from the internal resistance measuring drum while continuously rotating in synchronization with the internal resistance measuring drum. The impact test section is equipped with a selection drum that selects based on the result of quality evaluation, and the impact test section engages with a cylindrical battery holder that holds the battery in a vertical state, and a cam as the impact test section rotates. A plunger that is moved upward by a cam follower and inserts only the upper end of the battery into the lower end opening of the battery holder, and when the upper end of the battery is inserted into the lower end opening of the battery holder After connecting the battery holder to a vacuum circuit and pulling the battery to the upper end of the battery holder by its suction force, the battery holder is switched and connected to the compressed air circuit, and the battery is pressurized with compressed air. A battery quality evaluation device characterized in that it is configured to drop vertically and collide with the plunger.