KR20120123545A - Battery assembling machine and battery assembling method - Google Patents

Abstract

This invention provides the battery assembly apparatus which can attach easily the connection terminal of an electrical power collecting member to the said terminal part, without damaging a terminal part in each pole of a wound electrode body. The battery assembly device 1 flatly deforms the guide member 80 and the wound electrode body 2 having the guide portion 86 in which the active material non-forming portions 9a and 11a of the wound electrode body 2 are stacked. The pressurizing part 23 and the member insertion part 25 are provided. The member inserting portion 25 inserts the connecting terminal 19 into the active material non-forming portions 9a and 11a while contacting the surface of the guide portion 86.

Description

BATTERY ASSEMBLING MACHINE AND BATTERY ASSEMBLING METHOD}

The present invention is, for example, a battery assembly apparatus and a battery assembly method in which a strip-shaped positive electrode, a separator, and a strip-shaped negative electrode are stacked in turn, and a current collector member is attached to a wound electrode body formed by winding them. It is about.

Various secondary batteries are used as power sources for automobiles, portable computers, and various portable terminals (see, for example, Patent Documents 1 to 3). The conventional secondary batteries described in Patent Literatures 1 to 3 include a wound electrode body in which a band-shaped positive electrode, a separator, and a band-shaped negative electrode are stacked in turn, and wound around them, and a current collector member mounted to the wound electrode body. Doing.

The strip-shaped anode and cathode of the wound electrode body each have a strip-shaped core body and a polar active material formed on both surfaces of the core body. The polar active material is formed at one edge in the width direction of the core body and is not formed at the other edge. A band-shaped separator exists (i.e. sandwiched) between the band-shaped anodes and cathodes, and each of the edges on which the polar active material is not formed is wound so as to be located at both ends in the width direction of the core. The wound electrode body is constituted. The wound electrode body is flatly deformed (that is, flatly crushed). The edges on both sides where the polar active material is not formed are terminal portions of the positive electrode and the negative electrode, respectively.

The current collector member has an insulating member body and a plurality of connection terminals. The member main body is substantially rectangular. The plurality of connection terminals are made of a conductive metal and penetrate both ends in the longitudinal direction of the member main body. When assembled as a battery, a connection terminal is attached to the said terminal part, and is electrically connected to each of these positive and negative electrodes.

In the above-mentioned secondary battery, each connection member is attached to the terminal part of the positive electrode and the negative electrode of the wound electrode body flatly deformed.

Patent Document 1: JP 2000-323120 A Publication Patent Document 2: JP 2001-155711 A Publication Patent Document 3: JP 2009-181812 A Publication

However, in the secondary batteries described in Patent Documents 1 to 3 described above, since the positive electrode and the negative electrode and the connection terminal are made of a metal, when they rub against each other at the time of assembling, especially the terminal portions of the positive electrode and the negative electrode This is undesirable because scratches on the surface (that is, surface damage) cause an increase in the electrical resistance between the terminal portion and the connecting terminal. In addition, there is a fear that debris of the damaged terminal portion enters the wound electrode body and short-circuits the positive electrode and the negative electrode. In addition, when securing the terminal portion and the connecting terminal, it is difficult to secure a work space necessary for the winding center space portion of the wound electrode body, so that it is difficult to reduce the manufacturing cost such as a human hand.

Therefore, the objective of this invention is providing the battery assembly apparatus and battery assembly method which can easily install the connection terminal of an electrical power collecting member in the said terminal part, without damaging the terminal part of each pole of a wound electrode body, for example. In addition, when fixing the terminal portion and the connecting terminal, by securing a space necessary for welding or welding work in the winding center space portion of the wound electrode body, it is possible to automate the machine, resulting in a battery assembly that can lower the manufacturing cost An apparatus and a battery assembling method are provided.

In order to solve the above problems and achieve the object, in the battery assembly apparatus of claim 1 of the claims of the present invention, a band-shaped positive electrode, a separator, and a band-shaped negative electrode are stacked in turn, and they are wound A battery assembly apparatus for attaching a connecting terminal of a current collector member to a terminal portion of each of the configured rolled electrode body and the positive electrode and the negative electrode, comprising: a disposition portion on which a wound electrode body is disposed; A guide section having a guide section for guiding the guide portion, a pressing section for flatly deforming the wound electrode assembly by sandwiching the wound electrode assembly between the placement section, and a surface of the guide section, the connecting terminal being connected to the terminal section. It is characterized by including a member insertion portion to be inserted into.

The battery assembly apparatus and battery assembly method of this invention can easily install the connection terminal of a collector member in the said terminal part, without damaging the terminal part of each pole of a wound electrode body. Moreover, when fixing a terminal part and a connection terminal, by securing the space required for welding or welding operation | work to the winding center space part of a wound electrode body, automation by a machine can be enabled and the manufacturing cost can be reduced as a result.

1 is a front view schematically showing the configuration of a battery assembly apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view of a battery assembled by the battery assembling apparatus shown in FIG. 1.
3 is another perspective view of the battery shown in Fig.
4 is a perspective view of a current collector member of the battery shown in FIG. 3.
5 is a perspective view of the wound electrode body of the battery shown in FIG. 3.
6 is an exploded perspective view illustrating a part of the wound electrode body illustrated in FIG. 5.
7 is a cross-sectional view of a part of the wound electrode body shown in FIG. 6.
8 is a side view illustrating a configuration of a guide part of the battery assembly device shown in FIG. 1.
FIG. 9 is a front view of the guide part seen from the arrow IX direction in FIG. 8. FIG.
FIG. 10 is a side view illustrating a state in which guide members of the guide unit illustrated in FIG. 8 are close to each other.
FIG. 11 is a front view of the guide as viewed in the direction of arrow XI in FIG. 10.
12 is a front view of one guide member of the guide portion shown in Fig.
FIG. 13 is a front view illustrating a state in which a connection terminal approaches a guide member of the guide unit illustrated in FIG. 10.
FIG. 14 is a front view illustrating a state in which the connecting terminal illustrated in FIG. 13 is inserted into the terminal portion while contacting the surface of the guide portion.
FIG. 15 is a plan view of a space enlargement unit of the battery assembly apparatus illustrated in FIG. 1.
FIG. 16 is a plan view illustrating a state in which the intrusion expanding portions of the space expanding portion of the battery assembly device illustrated in FIG. 15 are separated from each other.
It is a front view which shows typically the state in which the binding sheet was adsorb | sucked to the mounting table and the pressing member before assembling the battery of the battery assembly apparatus shown in FIG.
FIG. 18 is a front view schematically showing a state in which an active material non-forming portion of a wound electrode body is disposed in a guide portion of a lowermost guide member of the battery assembly device shown in FIG. 17.
FIG. 19 is a front view schematically showing a state in which the intrusion member of the space enlargement portion of the battery assembly device shown in FIG. 18 is inserted into the center space of the wound electrode body in which the active material non-forming portion is superposed on the guide portion.
20 is a front view schematically showing a state where the center guide member of the battery assembly device shown in FIG. 19 is located at a guide position.
FIG. 21 is a front view schematically showing a state in which an active material non-forming part of another wound electrode body is superposed on a guide portion provided on an upper surface of the center guide member of the battery assembly device shown in FIG. 20.
It is a front view which shows typically the state in which the intrusion member of the space expansion part of the battery assembly apparatus shown in FIG. 21 was inserted in the center space of the upper wound electrode body.
FIG. 23 is a front view schematically showing a state where the uppermost guide member of the battery assembly device shown in FIG. 22 is located at a guide position.
It is a front view which shows typically the state in which the wound electrode body was deformed flat by the press part of the battery assembly apparatus shown in FIG.
It is a front view which shows typically the state which wound the binding sheet around the wound electrode body deformed flat by the binding part of the battery assembly apparatus shown in FIG.
FIG. 26 is a front view schematically showing a state where the connecting terminal is inserted into the terminal portion while being in contact with the surface of the guide portion of the battery assembly device shown in FIG. 25.
FIG. 27 is a front view schematically showing a state in which two guide members above the guide portion of the battery assembly device shown in FIG. 26 are positioned at a retracted position.
It is a front view which shows typically the state in which the cross-sectional area of the center space of the wound electrode body became large by the intrusion member of the space expansion part of the battery assembly apparatus shown in FIG.
It is a front view which shows typically the state in which the rotational arm of one invasion expansion part of the space expansion part of the battery assembly apparatus shown in FIG. 28 is located in a retreat position.
It is a front view which shows typically the state in which the clip was joined by the junction part etc. of the battery assembly apparatus shown in FIG.

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described. The battery assembly apparatus which concerns on one Embodiment of this invention arrange | positions the terminal part of a wound electrode body in a guide part, and inserts a connection terminal into a terminal part, making contact with the surface of this guide part. Thus, when arrange | positioning a connection terminal in a predetermined position, the connection terminal which consists of metal, respectively, and the terminal part of each pole do not directly contact. Therefore, the connecting terminal of a collector member can be easily attached to the said terminal part, without damaging the terminal part of each pole of a wound electrode body.

Moreover, you may comprise the thickness of a guide part thinner than the thickness of a connection terminal. In this case, when trying to pull out a guide part between a connection terminal and a terminal part, the position of this connection terminal and a terminal part can be prevented from shifting | deviating. Therefore, the connecting terminal can be attached to a desired position of the terminal section.

The guide portion may be provided with a substantially planar overlap portion (that is, the overlapped portion) on which the terminal portion is overlapped, and a curved inclined portion along the curve of the wound electrode body on the electrical connection terminal side than the overlap portion. In this case, when inserting a connection terminal into a terminal part, this connection terminal contacts only a guide part. Therefore, the connection terminal does not directly contact the terminal portion. Therefore, the connecting terminal of the collector member can be easily attached to the terminal portion without damaging the terminal portion of each pole of the wound electrode body.

The guide portion may be provided with a parallel extension portion that extends in parallel with the inclined portion and parallel to the insertion direction of the connecting terminal. When inserting the connection terminal into the member insertion portion, even if the position of the connection terminal is slightly shifted, the connection terminal can be guided to the position of the inclined portion by this parallel extension portion. Therefore, the connecting terminal can be reliably attached to the predetermined terminal portion.

The cross-sectional area of the center space of the wound electrode body deformed flat on the guide portion may be enlarged by the space enlargement portion. In this case, the terminal portions superimposed on each other can be superimposed on the outer circumferential side of the wound electrode body in a state of being in close contact with each other. By increasing the cross-sectional area of the center space of the wound electrode body, a work space for fixing the terminal portion and the connecting terminal can be secured, and thus the connecting terminal can be automatically attached to the connecting portion by the machine without requiring a manpower or the like. Therefore, the connection terminal of a current collector member can be fixed efficiently to the said terminal part.

Moreover, a some wound electrode body can also be bundled by a binding member. In this case, a battery can be comprised by several winding electrode body.

Moreover, the space expansion part may be provided with the member moving means for moving the penetration member inserted in the center space of the wound electrode body in the radial direction of the wound electrode body, or may be provided with the rotation means for rotating the penetration member. By this member moving means or a rotating means, a space enlargement part can reliably enlarge the cross-sectional area of the center space of the wound electrode body, and can attach a connection terminal to a terminal part efficiently.

It may be provided with the clip positioning part which determines the position of a clip which pinches | connects a connection terminal and a terminal part, and may be provided with the junction part which joins a connection terminal, a terminal part, and a clip. In this case, the connecting terminal of the current collector member can be securely fixed to the terminal portion.

Example

An embodiment of the present invention will be described based on FIGS. 1 to 30. In the battery assembly apparatus 1 according to the embodiment of the present invention, the current collector member 3 (shown in FIG. 4) is attached to the wound electrode body 2 (shown in FIG. 5), and the battery 4 (FIG. 2). And shown in FIG. 3). In the example shown, the battery 4 consists of a lithium ion battery used for a motor vehicle, a portable computer, and various portable terminals.

As shown in FIG. 2 and FIG. 3, the battery 4 includes two wound electrode bodies 2, a current collector member 3, and a clip 5. As shown in FIG. 6 and FIG. 7, the wound electrode body 2 has a positive electrode sheet 6 as a strip-shaped anode, a strip-shaped separator 7, and a negative electrode sheet 8 as a strip-shaped cathode. They are stacked and they are wound up.

The positive electrode sheet 6 includes a strip-shaped core body 9 and a positive electrode active material 10 formed on both surfaces of the core body 9. The core body 9 is comprised with the metal foil suitable for an anode, such as aluminum foil. The positive electrode active material 10 is formed over one edge and the center of the core 9 in the width direction, and is not formed at the other edge. That is, at the other edge of the core body 9 in the width direction, there is a positive electrode active material non-forming portion (corresponding to the terminal portion) 9a that exposes the core body 9 to a constant width.

The negative electrode sheet 8 includes a strip-shaped core body 11 and a negative electrode active material 12 formed on both surfaces of the core body 11. The core body 11 is comprised from the metal foil suitable for negative electrodes, such as copper foil. The negative electrode active material 12 is formed over one edge and the center portion of the core 11 in the width direction, and is not formed at the other edge. That is, at the other edge of the core 11 in the width direction, there is a negative active material non-forming portion (corresponding to the terminal portion) 11a that exposes the core 11 to a predetermined width.

The wound electrode body 2 has a positive electrode such that the positive electrode active material non-forming part 9a does not contact the negative electrode sheet 8 and the negative electrode active material non-forming part 11a does not contact the positive electrode sheet 6. The sheet 6, the separator 7, and the negative electrode sheet 8 are piled up and wound up one by one, and are comprised. And as shown in FIG. 5, the wound electrode body 2 is deformed flat (that is, it is squashed flat). Moreover, the some wound electrode body 2 flatly deformed is piled up, and the binding sheet 13 (shown in FIG. 13) as a binding member is wound around and fixed to these circumference | surroundings.

The current collector member 3 has an insulating member main body 14 and the terminal part 15 provided in this member main body 14, as shown in FIG. The member main body 14 is comprised from insulating synthetic resin, and is superposed on one edge of the wound electrode body 2 in the width direction deformed flat on the outer peripheral surface of the wound electrode body 2.

The terminal part 15 has the positive terminal part 16 and the negative terminal part 17 arrange | positioned at the both ends of the member main body 14 at intervals. The positive electrode terminal portion 16 and the negative electrode terminal portion 17 are electrically connected to the positive electrode sheet 6 and the negative electrode sheet 8 of the wound electrode body 2, respectively, when assembled as the battery 4. The positive terminal portion 16 and the negative terminal portion 17 are each a terminal portion body 18 at both ends of the member body 14 described above, and four connecting terminals 19 erected from one surface of the terminal portion body 18. And one bolt terminal 20 erected from the other surface of the terminal portion main body 18.

The connecting terminals 19 are each made of a conductive metal and the like, and are formed in a rod shape erected from the terminal body 18. When the two sets of connecting terminals 19 are assembled as the battery 4, the active material non-forming portions of the core bodies 9 and 11 of the corresponding sheets 6 and 8 of the wound electrode body 2, respectively ( 9a, 11a). The two sets of connection terminals 19 are provided with clips 5 which describe the active material non-forming portions 9a and 11a of the core bodies 9 and 11 of the sheets 6 and 8 of the wound electrode body 2. It is fitted and attached to the corresponding active material non-forming portions 9a and 11a.

The bolt terminal 20 is electrically connected to the connection terminal 19 mentioned above. The bolt terminal 20 is used as a terminal when discharging or charging the battery 4.

The clip 5 is made of a conductive metal or the like. In addition, the active material non-forming parts 9a and 11a and the connecting terminal 19 are inserted into the clip 5 and welded, so that the active material non-forming parts 9a and 11a are electrically connected to the connecting terminal 19. do.

The assembly process of the battery 4 of the structure mentioned above is a process of bundle | bonding with the binding sheet 13 after two wound electrode bodies 2 are deformed flat by the battery assembly apparatus 1 mentioned later, and these wound electrode bodies. A step of inserting the connection terminal 19 of the current collector member 3 into (2), a step of attaching the connection terminal 19 to the active material non-forming portions 9a, 11a of each of the wound electrode bodies 2, and the like. Include.

As shown in FIG. 1, the battery assembly apparatus 1 includes the apparatus main body 21, the guide portion 22, the pressing portion 23, the space expanding portion 24, the member insertion portion 25, and the binding portion ( 26), the clip positioning part 27 and the junction part 28 are provided.

The apparatus main body 21 is attached to the base plate 29 installed on the factory floor, the support 30 erected from this base board 29, and the upper end of this support 30, and the base board 29 and It has the ceiling plate 31 arrange | positioned in parallel at intervals, and the mounting table 32 as an arrangement | positioning part. As shown in FIG. 1, the mounting table 32 is formed in a thick flat plate shape and attached to the base plate 29. As shown in FIG. 1, the mounting table 32 is formed in a trapezoidal shape when viewed from the front of the battery assembly apparatus 1. On the surface of the mounting table 32, it is adsorbed by the negative pressure of the binding sheet 13, and is piled up in the state in which it adhered closely. In addition, the active material non-forming portions 9a and 11a are positioned in front and rear of the mounting table 32 (i.e., inside), and one wound electrode body 2 is spaced above the binding sheet 13. Is placed.

The pair of guide parts 22 is provided corresponding to each of the active material non-formation parts 9a and 11a of the wound electrode body 2 placed on the mounting table 32. According to the example shown, the guide part 22 is provided in the back (namely, inside) and front side of FIG. 1 rather than the mounting table 32. As shown in FIG. 8 and 9, the guide part 22 is provided with the slide support part 33 and the guide member 80 of several pieces (three in the example of illustration).

The slide support part 33 is equipped with the base part 81, the support column 82, and two sliders 83. As shown in FIG. The base portion 81 is formed in a thick flat plate shape and attached to the base plate 29. The support main body 82 is provided standing from the base portion 81, that is, the base plate 29. The two sliders 83 are aligned along the longitudinal direction of the support column 82 and are supported to be movable in the longitudinal direction of the support column 82. One slider 83 is supported by the support column 82 so as to be movable over the center portion and the lower end portion of the support column 82. The other slider 83 is supported by the support 82 so as to be movable over the upper end of the support 82 and immediately above one slider 83.

The guide member 80 is arrange | positioned at intervals between the base board 29 and the ceiling board 31. FIG. One of the three guide members 80 is fixed to the base portion 81. In addition, the other two guide members 80 are each supported by the slide bar 84 so that a slide to a horizontal direction is possible. The two guide members 80 are positioned at the position indicated by the solid line in FIG. 8, that is, the retreat position away from the wound electrode body 2 on the mounting table 32, and the position shown in FIG. 8 and the dotted line in FIG. It is provided so that a movement is possible over the guide position closest to the wound electrode body 2 on the base 32. As shown in FIG. In addition, when three guide members 80 are in a guide position, as shown in FIG. 10, they are located so that they may be aligned in a perpendicular direction. Moreover, each guide part 22 is provided with the drive source (not shown) for sliding the two slide bars 84 to the longitudinal direction.

As shown in FIG. 11 and FIG. 12, the guide member 80 is provided with the guide main body and the guide part 86 attached to the said slide bar 84 or the base part 81, respectively. The guide main body 85 is formed in the rectangular parallelepiped shape, and the longitudinal direction is arrange | positioned at the horizontal direction. The guide portion 86 includes a substantially planar portion along the plane of the wound electrode body 2 and a small portion on the surface along the curve of the wound electrode body 2. In addition, according to the example of illustration, the guide part 86 is provided in the upper surface of the guide main body 85 by the lowest guide member 80, and the upper surface of the guide main body 85 by the guide member 80 of the center. It is provided in the lower surface, and is provided in the lower surface of the guide main body 85 by the guide member 80 of the uppermost. 9, 11 and 12, the active material non-forming portions 9a and 11a of the wound electrode body 2 on the mounting table 32 are formed on the surface of the guide portion 86. Is put on.

Since the guide parts 86 of the three guide members 80 mentioned above have the same structure, it demonstrates below on behalf of the guide part 86 of the guide member 80 located in the lowermost part. As shown in FIG. 12, the guide portion 86 includes an overlap portion 87, an inclined portion 88 subsequent to the overlapped portion 87, and a parallel extension portion 89 connected to the inclined portion 88. It is formed in the shape of a thin plate provided. This overlapping part 87 is horizontal and is substantially planar parallel to the active material non-formation parts 9a and 11a of the wound electrode body 2 on the mounting table 32. In the overlapping portion 87, the active material non-forming portions 9a and 11a of the wound electrode body 2 on the mounting table 32 are stacked.

The inclined portion 88 is a small portion on the plane along the curve of the wound electrode body 2, and is present on the connection terminal 19 side than the overlap portion 87 as shown in FIG. 13. On the connection terminal 19 side of the inclined portion 88, a parallel extension portion 89 substantially parallel to the overlap portion 87 is extended. When the member inserting portion inserts the connecting terminal 19, the parallel extension portion 89, the inclined portion 88 and the overlapping portion 87 are formed such that the connecting terminal 19 is the active substance of the wound electrode body 2. It serves to guide the position superimposed on the non-formed portions 9a, 11a.

As shown in FIG. 9, two wound electrode bodies 2 can also be arrange | positioned between three guide members 80. FIG. One wound electrode body 2 is disposed between the guide portion 86 of the lowermost guide member 80 and the guide portion 86 provided on the lower surface of the center guide member 80, and the center guide member One rolled electrode body 2 is disposed between the guide portion 86 provided on the upper surface of 80 and the guide portion 86 of the uppermost guide member 80. In this state, as shown in FIGS. 10 and 11, the two guide members 80 can move downward. The two guide members 80 are moved up and down by a drive source (not shown) in conjunction with the lifting operation of the slider 92 of the pressing cylinder 34 of the pressing unit 23 described later.

The press part 23 is provided with the press plate 90, the press cylinder 34, and the press member 35. As shown in FIG. The press plate 90 is formed in the form of a thick flat plate, and is arrange | positioned in parallel with the said base board 29 at intervals with the base board 29. As shown in FIG. The pressure plate 90 is located above the three guide members 80 of the wound electrode body 2 and the guide part 22 on the mounting table 32. The pressure plate 90 is provided to be elevated by the guide pillar.

The pressurizing cylinder 34 stands on the base plate 29 and is attached to the cylinder main body 36 attached to the base plate 29, and the slider 92 slidably installed in the cylinder body 36 along the vertical direction. Equipped with. The slider 92 is attached to the pressure plate 90. The pressure cylinder 34 raises and lowers the pressure plate 90 by raising and lowering the slider 92.

The pressing member 35 is attached to the surface facing the mounting table 32 of the pressing plate 90, and is formed in a thick flat plate shape. As shown in FIG. 1, the pressing member 35 is formed in a trapezoidal shape that is convex toward the mounting table 32 when viewed from the front of the battery assembly apparatus 1. The binding member 13 is stacked on the pressing member 35 in a state where the binding sheet 13 is tightly adsorbed by the negative pressure.

As the pressure cylinder 34 moves the pressure member 35 downward, the wound electrode body 2 provided between the guide portions 86 of the guide member 80 is sandwiched between the mounting table 32 and the wound electrode. The sieve 2 is flattened.

The space expansion part 24 is provided with a pair corresponding to each of the active material non-formation parts 9a and 11a of the wound electrode body 2. In the example of illustration, the space expansion part 24 is provided in back side (inside) and front side in FIG. 1 rather than the mounting table 32. As shown in FIG.

As shown in FIG. 15 and FIG. 16, the space expansion part 24 is provided with the slide mechanism part 37 and two intrusion expansion parts 38 as member moving means. As shown in FIG. 1, the slide mechanism portion 37 is provided on the right side of the mounting table 32 when viewed from the front of the battery assembly apparatus 1. The slide mechanism part 37 is provided with the linear guide 39 and the drive source (not shown).

The linear guide 39 includes a rail 41 extending in a straight line in the left and right direction in FIG. 1, and a slider 42 provided on the rail 41 so as to be slidable along the longitudinal direction of the rail 41. Doing. The slider 42 moves along the longitudinal direction of the rail 41 by the drive source. The slide mechanism part 37 moves the slider 42 along the rail 41 in the direction away from the wound electrode body 2, and the intrusion member 93 described later of the intrusion expanding part 38 attached to the slider 42 is described later. ) Is moved along the radial direction of the wound electrode body 2 in the outer circumferential direction of the wound electrode body 2. In the slide mechanism 37, the slider 42 moves along the rail 41 in a direction away from the wound electrode body 2, so that the intrusion member 93 described later moves the radial direction of the wound electrode body 2. Therefore, it moves to the outer peripheral direction of the wound electrode body 2.

The two intrusion expanding portions 38 are spaced apart from each other along the left and right directions in FIG. 1, that is, along the longitudinal direction of the rail 41 of the linear guide 39, when viewed from the front of the battery assembly device 1. It is arrange | positioned in the position which pinches the mounting table 32 mutually.

As shown in FIG. 1, the intrusion expanding unit 38 includes a support column 43, two sliders 44, two pivoting arms 45, and two lock latches 46. Equipped with. The support column 43 extends linearly along the vertical direction, and is arrange | positioned in the state which stood up from the base board 29. As shown in FIG. The support column 43 of the right intrusion expansion part 38 in FIG. 1 is attached to the slider 42 of the linear guide 39, and the support column 43 of the left intrusion expansion part 38 in FIG. It is attached to the base plate 29.

The two sliders 44 are aligned along the longitudinal direction of the support column 43 and are supported to be movable along the longitudinal direction of the support column 43. One slider 44 is supported to be movable over the center part and the lower end part of the support column 43. The other slider 44 is supported by the support column 43 so as to be movable over the upper end of the support column 43 and immediately above one slider 44.

The rotational arm 45 extends in a straight line parallel to the horizontal direction when viewed from the front of the battery assembly apparatus 1. As shown in FIG. 15 and FIG. 16, the rotation arm 45 is rotatably supported by the slider 42, and the other end is extended so that it may become close to the wound electrode body 2. As shown in FIG. In addition, the rotation arm 45 has an intrusion position parallel to the insertion direction of the connection terminal 19 shown in solid lines in FIGS. 15 and 16, and the wound electrode body 2 shown in double dotted lines in FIGS. 15 and 16. It is rotatably supported by the slider 42 over a retracted position away from).

At the other end of the rotating arm 45, an intrusion member 93 that penetrates into the center space K of the wound electrode body 2 is attached. The intrusion member 93 is a shape which protrudes toward the wound electrode body 2 as it goes to the other end of the rotation arm 45. The intrusion member 93 is supported by the other end of the rotation arm 45 so that it may rotate about the axial center of the wound electrode body 2. Moreover, the rotation drive source 47 to the rotating means which rotates the intrusion member 93 is attached to the other end of the rotation arm 45 of the intrusion expansion part 38. As shown in FIG. In addition, the rotational arm 45 is urged toward the retracted position from the intrusion position, that is, away from the wound electrode body 2 by a spring or the like as the urging means. In addition, the rotation arm 45 is pressed toward the intrusion position from the retreat position by a drive source (not shown) attached to the base plate 29.

The lock latch 46 is supported by the slider 44 so that the center part can rotate. The locking latch 46 is provided so that the latch 94 latched by the rotation arm 45 protrudes at one end closer to the wound electrode body 2. Moreover, the lock latch 46 is pressed by the spring etc. as a pressing means (not shown) in the direction by which the said latch 94 is locked by the rotation arm 45. As shown in FIG. In addition, by the drive source (not shown) attached to the base plate 29, the latch 94 is pressed in a direction away from one end of the rotation arm 45.

When the latch 94 is locked to one end of the pivot arm 45, the pivot arm 45 is held at the intrusion position described above. In addition, when the locking catch 46 rotates in a direction away from one end of the rotating arm 45 against the pressing force of the above-described pressing means, the locking of the latch 94 is released and the rotating arm is released. 45 rotates toward the retracted position described above.

In the space enlargement part 24 of the structure mentioned above, when two intrusion expansion parts 38 approach each other and the rotation arm 45 is located in an intrusion position, the intrusion member 93 will be wound by the wound electrode body 2. It is inserted in the center space K of (). And the space expansion part 24 makes the intrusion expansion part 38 mutually move away by the slide mechanism part 37, and the intrusion member 93 widens the cross-sectional area of the center space K. As shown in FIG. That is, the space expansion part 24 expands the center space K of the wound electrode body 2 to the outer circumferential side along the radial direction of the wound electrode body 2. Thereby, the active material non-formation parts 9a and 11a of the rolled electrode body 2 superimposed on each other can be piled together in the state in which the outer peripheral side of the wound electrode body 2 is in close contact with each other. And the locking latch 46 is pressed by the drive source in the direction in which the latch to one edge part of the rotation arm 45 is released by the drive source. When the locking arm 46 is released and the pivoting arm 45 is rotated from the intrusion position to the retracted position, the intrusion member 93 is released from the center space K. As shown in FIG. In addition, the slider 44 of each intrusion enlargement part 38 of each space enlargement part 24, ie, the rotation arm 45, raises and lowers the slider 92 of the pressurization cylinder 34 of the pressurization part 23. As shown in FIG. In conjunction with, the lifting operation by a driving source (not shown) is performed.

The member insertion part 25 is arrange | positioned at the right side in FIG. 1 of the guide part 22. FIG. The member insertion part 25 is equipped with the insertion cylinder 48 and the member holding part 49. The insertion cylinder 48 is provided with the cylinder main body 50 and the rod 51 provided so that projecting from this cylinder main body 50 is possible. The insertion cylinder 48 is provided on the base plate 29 in a state in which the rod 51 extending from the cylinder main body 50 is close to the guide portion 22.

The member holding part 49 holds the bolt terminal 20 of the terminal part 15 of the current collecting member 3. The current collector member 3 is held such that the connection terminal 19 faces the horizontally wound electrode body 2 and is horizontal.

Then, the rod 51 of the insertion cylinder 48 extends, and the current collecting member 3 held by the member holding portion 49 is placed on the mounting table 32 and on the guide portion 86 of the guide member 80. It is close to the wound electrode body 2 disposed in the side. And the connection terminal 19 slides the surface of the guide part 86, and the connection terminal 19 of the electrical power collecting member 3 is inserted in the guide part 86. As shown in FIG. At this time, the connecting terminal 19 contacts only the guide portion 86. The connecting terminal 19 is not in contact with the active material non-forming portions 9a and 11a of the wound electrode body 2.

As shown in FIG. 1, the binding portion 26 is capable of being driven from the bottom surface of the first protrusion member 52 and the pressing member 35 which are provided so that they can be driven from the surface of the mounting table 32. The 2nd protrusion member 53 provided is provided. The plurality of first protrusion members 52 are spaced apart from each other in the left and right directions in FIG. 1 of the mounting table 32 and spaced apart from each other in the depth direction (that is, in the inward direction) in FIG. 1. The first protrusion member 52 is driven from the surface of the mounting table 32 by an air cylinder (not shown) or the like attached to the base plate 29. The plurality of second projection members 53 are provided with a space between the pressing members 35 in the left and right directions in FIG. 1 and spaced apart from each other in the depth direction in FIG. 1. The second protrusion member 53 is driven from the lower surface of the pressure member 35 by an air cylinder (not shown) or the like attached to the pressure plate 90.

The wound electrode body 2 sandwiched between the pressing member 35 and the mounting table 32 is deformed flat, and the protrusion members 52 and 53 are moved from the surface of the mounting table 32 and the lower surface of the pressing member 35. Extrude And the binding sheet 13 which the bulging members 52 and 53 adsorb | sucked on the surface of the mounting table 32 and the lower surface of the press member 35 is wound around the wound electrode body 2 deformed flatly. . In addition, the adhesive tapes of the binding sheet 13 are attached to each other, and the two wound electrode bodies 2 described above are bound by the binding sheet 13.

The clip positioning part 27 is equipped with the robot arm 55 attached to the apparatus main body 21 so that the movement part 54 is movable with respect to the mounting table 32 and the guide part 22. As shown in FIG. The robot arm 55 attracts the clip 5 of the clip accommodating part (not shown) provided in the apparatus main body 21 to the front-end | tip. The clip 5 thus adsorbed is positioned by sandwiching the connecting terminal 19 and the active material non-forming portions 9a and 11a.

The joining part 28 is equipped with the ultrasonic welding apparatus 57 attached to the apparatus main body 21 so that the movement part 56 is movable with respect to the mounting table 32 and the guide part 22. As shown in FIG. The ultrasonic welding apparatus 57 joins the clip 5 which the robot arm 55 positioned, the active material non-formation part 9a, 11a, and the connection terminal 19 by ultrasonic welding.

The clip positioning part 27 and the junction part 28 of the structure mentioned above mutually join the clip 5 to the connection terminal 19 one by one.

By the battery assembly apparatus 1 mentioned above, the battery 4 is assembled as follows. First, as shown in FIG. 17, the guide member 80 is located in a retracted position. And the rotation arm 45 of each invasion expansion part 38 of each space expansion part 24 is located in a retreat position. The binding sheet 13 is stacked and adsorbed on the surface of the mounting table 32, and the binding sheet 13 is stacked and adsorbed on the lower surface of the pressing member 35. In addition, the current collector member 3 is held by the member holding portion 49 of the member insertion portion 25, and the rod 51 of the insertion cylinder 48 of the member insertion portion 25 is reduced.

And as shown in FIG. 18, one wound electrode so that the active material non-formation part 9a, 11a may be superposed on the guide part 86 of the guide member 80 located in the lowermost part of each guide part 22. As shown in FIG. Sieve 2 is placed. The above is the overlapping process in which the active material non-formation portions 9a and 11a of the wound electrode body 2 are stacked on the guide portion 86 of the guide member 80. And as shown in FIG. 19, the rotational arm 45 located below the invasion expansion part 38 of each space expansion part 24 is located in an intrusion position, and the intrusion member 93 mentioned the one winding mentioned above. It is inserted in the center space K of the electrode body 2. And as shown in FIG. 20, the guide member 80 located in the center of each guide part 22 is located in a guide position.

After that, as shown in FIG. 21, the active material non-forming portions 9a and 11a are superposed on the guide portion 86 provided on the upper surface of the guide member 80 positioned in the center of each guide portion 22. The second wound electrode body 2 is placed. The above is the second overlapping process in which the active material non-forming portions 9a and 11a of the wound electrode body 2 are stacked on the guide portion 86 of the guide member 80. And as shown in FIG. 22, the rotation arm 45 located above the intrusion expansion part 38 of each space expansion part 24 is located in an intrusion position, and the intrusion member 93 mentioned the 2nd winding mentioned above. It is inserted in the center space K of the electrode body 2. And as shown in FIG. 23, the guide member 80 located in the uppermost part of each guide part 22 is located in a guide position.

Then, as shown in FIG. 24, the slider 92 of the pressurizing cylinder 34 of the pressurizing part 23 is lowered, and the pressurizing member 35 is lowered. Then, the pressing member 35 presses toward the mounting table 32 of the wound electrode body 2 placed on the guide portion 86 of the guide member 80. In addition, a drive source (not shown) lowers the two guide parts 86 located above each guide part 22 in conjunction with the lowering of the pressing member 35 toward the mounting table 32, The sliders 44, that is, the rotational arms 45, of the two intrusion enlarged portions 38 of the respective space enlarged portions 24 are lowered toward the mounting table 32. And as shown in FIG. 24, the wound electrode body 2 deforms flatly between the mounting table 32 and the press member 35 in the state which the intrusion member 93 penetrated in the center space K. As shown in FIG. . The above is the pressing process in which the wound electrode body 2 is flatly deformed between the pressing member 35 and the mounting table 32.

Thereafter, the first protrusion member 52 of the binding portion 26 protrudes from the surface of the mounting table 32, and the second protrusion member 53 protrudes from the surface of the pressing member 35. Then, the binding sheet 13 adsorbed by the mounting table 32 and the pressing member 35 is wound around two wound electrode bodies 2 flatly deformed, as shown in FIG. The electrode body 2 is bound by the binding sheet 13. The above is the binding process in which the binding sheet 13 is wound around two, ie, the plurality of wound electrode bodies 2, and the plurality of wound electrode bodies 2 are bound by the binding sheet 13.

And the rod 51 of the insertion cylinder 48 of the member insertion part 25 is extended, and the collector member 3 hold | maintained at the said member insertion part 25 approaches the wound electrode body 2 in which it deformed flatly. Done. Then, as shown in FIG. 13, each connection terminal 19 of the electrical power collecting member 3 approaches the guide part 86 of the guide member 80 gradually. The connecting terminal 19 is brought into contact with the inclined portion 88 of the guide portion 86 and guided by the inclined portion 88. Subsequently, as shown in FIG. 14 and FIG. 26, the overlapping portion 87 comes in contact with the connecting terminal 19 so that the connecting terminal 19 is formed of the active material non-forming portions 9a and 11a of the wound electrode body 2. It is guided to overlap at the position of. In this way, the guide part 86 guides the connection terminal 19 to the position which overlaps with the active material non-formation part 9a, 11a. The above is the insertion process in which the connecting terminal 19 is inserted on the rear surface of the surface where the active material non-forming portions 9a and 11a of the guide portion 86 are stacked.

And the guide member 80 located above each guide part 22 is moved along the slide bar 84 by a drive source (not shown), and is moved away from the wound electrode body 2. And as shown in FIG. 27, the guide part 86 of the two guide members 80 located in the upper part is made into the active material non-formation part 9a, 11a of the wound electrode body 2, and the connection terminal 19. As shown in FIG. I take it out in between). The above is the process of removing the guide part 86 between the wound electrode body 2 and the connection terminal 19.

Thereafter, the slider 42 of the slide mechanism portion 37 of each space enlargement portion 24 is moved in a direction in which the two intrusion enlargement portions 38 move away from each other. Then, as shown in FIG. 28, the intrusion member 93 of the right invasion expansion part 38 in the figure and the intrusion expansion part 38 of the left side in a figure move in the direction away from each other. When the intrusion member 93 moves to the outer peripheral side along the longitudinal direction of the wound electrode body 2, the active material non-formation parts 9a and 11a superimposed each other on the outer peripheral side of the wound electrode body 2 are carried out. More closely overlap each other. As a result, the cross-sectional area of the center space K of the wound electrode body 2 can be increased. Then, the intrusion member 93 of the intrusion expanding portion 38 on the right side in the drawing is properly rotated by the rotation drive source 47. The above is an enlargement process of extending the center space K of the wound electrode body 2 flatly deformed by the pressing section 23 in the radial direction of the wound electrode body 2.

Then, as shown in FIG. 29, the latch of the latch 94 of the lock latch 46 which latched one end of the right rotation arm 45 in the figure of each space expansion part 24 is cancelled | released, The pivot arm 45 is positioned in the retracted position. And the intrusion member 93 attached to the other end of the rotation arm 45 located in a retracted position comes out from the center space K. As shown in FIG. Then, by the robot arm 55 of the clip positioning unit 27, the clips 5 are positioned by sandwiching the connecting terminals 19 and the active material non-forming parts 9a and 11a one by one, and then the joining portions ( The clip 5 positioned by the ultrasonic welding device 57 of 28 is joined to the connecting terminal 19 or the like. As described above, the clip positioning process in which the clip 5 is positioned with the connecting terminal 19 and the active material non-forming parts 9a and 11a positioned, and the connecting terminal 19 and the active material non-forming part 9a, It is a joining process in which 11a) and the clip 5 are joined.

And all the connection terminals 19 are sequentially joined by the clip 5 to the active material non-formation parts 9a and 11a. The above is the assembly process of the battery 4.

According to the present embodiment, the active material non-forming parts 9a and 11a of the wound electrode body 2 are disposed in the guide part 86 of the guide member 80, and the active material non-forming part of the guide part 86 is disposed. Since the portions 9a and 11a insert the connecting terminal 19 on the rear side of the overlapped surface, when positioning the connecting terminal 19, the active material non-forming part 9a, by the guide portion 86, is positioned. 11a) and the connection terminal 19 do not directly contact. For this reason, when positioning the connection terminal 19 in a predetermined position, it is possible to prevent surface damage of the active material non-forming portions 9a and 11a. Therefore, the connecting terminal 19 can be easily attached or provided to the active material non-forming parts 9a and 11a without damaging the active material non-forming parts 9a and 11a of the wound electrode body 2.

In addition, the thickness of the guide portion 86 is made thinner than that of the connecting terminal 19, so that the guide portion 86 is to be pulled out between the connecting terminal 19 and the active material non-forming portions 9a and 11a. At this time, the connection terminal 19 and the active material non-forming portions 9a and 11a can be prevented from being displaced. Thus, the connecting terminal 19 can be attached to a desired position of the active material non-forming portions 9a and 11a.

In addition, the guide portion 86 is a substantially planar overlap portion 87 in which the active material non-forming portions 9a and 11a are superimposed, and a small portion on the curved surface along the curve of the wound electrode body 2, and the overlap is performed. The inclination part 88 located in the side of the connection terminal 19 rather than the part 87 is provided. Thus, when the connecting terminal 19 is inserted on the rear surface of the surface where the active material non-forming portions 9a and 11a of the guide portion 86 are overlapped, the connecting terminal 19 is connected to the guide portion 86. The above-mentioned active material non-formation portions 9a and 11a are in contact with the rear (i.e., inner) face of the superposed face. Therefore, the connection terminal 19 does not contact the active material non-forming portions 9a and 11a. Thereby, the connection terminal 19 of the electrical power collecting member 3 is easily connected to the active material non-formation parts 9a and 11a without damaging the active material non-formation parts 9a and 11a of the wound electrode body 2. Can be attached.

The guide portion 86 further includes a parallel extension portion 89 that extends substantially parallel to the overlapping portion 87 on the connection terminal 19 side of the inclined portion 88. When the connecting terminal 19 is inserted into the member insertion portion 25, even if the position of the connecting terminal 19 is slightly shifted, the parallel extending portion 89 allows the corresponding connecting terminal ( 19) can be guided. For this reason, even when the plurality of wound electrode bodies 2 are stacked, the active material non-forming portions 9a and 11a of the plurality of wound electrode bodies 2 can be distinguished by the guide portion 86. Therefore, the connecting terminal 19 can be reliably attached to the predetermined active material non-forming portions 9a and 11a.

When the intrusion member 93 moves to the outer peripheral side along the longitudinal direction of the wound electrode body 2, the active material non-formation parts 9a and 11a superimposed each other on the outer peripheral side of the wound electrode body 2 are carried out. They are stacked on each other in a closer contact. As a result, the cross-sectional area of the center space K of the wound electrode body 2 can be increased. For this reason, a working space can be secured and the connection terminal 19 can be easily attached to the active material non-formation part 9a, 11a.

Moreover, since the some winding electrode body 2 piled up with each other by the binding sheet 13 is bound, the battery 4 can also be comprised from the some winding electrode body 2.

And the intrusion member 93 of the intrusion expansion part 38 rotates suitably by the rotation drive source 47. For this reason, the space expansion part 24 can reliably enlarge the center space K of the wound electrode body 2, and efficiently attach the connection terminal 19 to the active material non-forming parts 9a and 11a. can do.

Since the clip positioning part 27 which determines the position of the clip 5 is provided in the position which inserts the active material non-formation parts 9a and 11a between the connection terminal 19, the active material ratio more reliably. The connection terminal 19 can be attached to the formation part 9a, 11a.

In addition, although the above-mentioned battery assembly apparatus 1 demonstrated the example which assembles the battery 4 provided with the two wound electrode bodies 2, in this invention, the battery provided with only one wound electrode body 2 was carried out. (4) Or the battery 4 provided with three or more wound electrode bodies can also be assembled. In this case, of course, the number of the guide member 80, the penetration expansion part 38, the support column 70, etc. can be suitably changed according to the number of the wound electrode bodies 2, and so on.

In addition, the above-mentioned embodiment is only showing the typical form of this invention, and this invention is not limited to this embodiment. In other words, it can be carried out in a variety of forms without departing from the gross bone of the present invention. In addition, although it demonstrated in detail with reference to drawings about embodiment of this invention, a specific structure is not limited to this embodiment, The design change etc. of the range which do not deviate from the summary of this invention are included in the scope of the present invention. That is, each part of the battery assembly apparatus 1 can be suitably changed within the range which does not deviate from the meaning of this invention.

1: battery assembly device
2: wound electrode body
3: current collector member
5: Clip
6: anode sheet (anode)
7: separator
8: cathode sheet (cathode)
9a: positive electrode active material non-forming part (terminal part)
11a: negative active material non-forming part (terminal part)
13: binding sheet (binding member)
19: Connection terminal
23: pressurization
24: space enlargement
25: member insertion part
26: binding unit
27: clip positioning unit
28: junction
32: placement table (placement unit)
37: slide mechanism portion (member moving means)
47: rotation drive source (rotation means)
86: guide part
87: overlap
88: inclined portion
89: parallel extension
93: intrusion member
K: center space

Claims (19)

A battery assembly apparatus in which a strip-shaped positive electrode, a separator, and a strip-shaped negative electrode are stacked in turn, and a connection terminal of a current collector member is attached to a terminal portion of each of the positive electrode and the negative electrode of the wound electrode body formed by winding them.
An arrangement unit on which the wound electrode body is disposed;
A guide part superimposed on the terminal part and having a guide part for guiding the connection terminal;
A pressurizing portion for flatly deforming the wound electrode body by sandwiching the wound electrode body with the placement portion; And
A terminal insertion portion for inserting the connection terminal into the terminal portion while being in contact with the surface of the guide portion,
Battery assembly device comprising a. The battery assembly apparatus of Claim 1 in which the thickness of the said guide part is formed thinner than the thickness of the said connection terminal. The said guide part is provided with the substantially flat overlap part by which the said terminal part was overlapped, and the curved inclination part which exists in the connection terminal side rather than the said overlap part along the curve of the said winding electrode body, It is characterized by the above-mentioned. Battery assembly apparatus. The battery assembly apparatus according to claim 3, wherein the guide portion is provided on the connection terminal side rather than the inclined portion, and has a parallel extension portion extending substantially parallel to the overlapping portion. The battery assembly apparatus of Claim 1 provided with the space expansion part which enlarges the cross-sectional area of the center space of the wound electrode body deformed flat by the said press part. The battery assembly apparatus according to claim 5, wherein the guide portion and the space enlargement portion move in the direction of the placement portion as the pressing portion moves in the direction of the placement portion. The battery assembly according to claim 1, further comprising a binding portion for winding a binding member around the wound electrode body provided on the placement portion and binding the plurality of wound electrode bodies with the binding member. Device. The said space expansion part is provided with the chipping member inserted in the center space of the said winding electrode body, and the member moving means which moves the said chipping member to the outer peripheral side along the radial direction of the said winding electrode body. Battery assembly apparatus. The battery assembly apparatus according to claim 8, wherein the space expanding portion further comprises rotation means for rotating the intrusion member about an axis of the intrusion member. The battery assembly apparatus of Claim 1 provided with the clip positioning part which pinches | interposes the connection terminal and the clip which pinch | interposes and clamps the said terminal part to the terminal part. The battery assembly apparatus of Claim 10 provided with the junction part which joins the said connection terminal, the said terminal part, and the said clip. A battery assembly method in which a strip-shaped positive electrode, a separator, and a strip-shaped negative electrode are stacked in turn, and a connection terminal of a current collector member is attached to a terminal portion of each of the positive electrode and the negative electrode of the wound electrode body formed by winding them.
A step of overlapping the guide member on the connection terminal by disposing the wound electrode body on a guide member that guides the connection terminal;
A pressing step of flatly deforming the wound electrode body;
Insertion process of inserting the said connection terminal into the said terminal part, making contact with the surface of the said guide member.
Battery assembly method comprising a. The battery assembly method of Claim 12 including the process of extracting a guide part between the said winding electrode body and the said connection terminal. The battery assembly method according to claim 12, further comprising an enlargement step of enlarging the cross-sectional area of the center space of the wound electrode body flatly deformed by the pressing unit. 13. A binding process according to claim 12, further comprising a binding step in which a plurality of the wound electrode bodies are provided, a binding member is wound around the plurality of wound electrode bodies provided, and the plurality of wound electrode bodies are bound by the binding member. Battery assembly method, characterized in that. The battery assembly method according to claim 14, wherein in the enlargement step, the intrusion member inserted into the center space of the wound electrode body is moved to the outer circumferential side along the radial direction of the wound electrode body. The battery assembly method according to claim 14, wherein in the enlargement step, the intrusion member is rotated about an axis of the intrusion member. The battery assembly method according to claim 12, further comprising a clip positioning step of positioning the connection terminal nested in the terminal portion and the clip for clamping the terminal portion with the connection terminal and the terminal portion in position. The battery assembly method according to claim 18, comprising a bonding step of joining the connection terminal, the terminal portion, and the clip.

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