JP2010129450A - Battery and manufacturing method of battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery with high reliability in which mixing of foreign matters into battery interior is suppressed, and a first metal part and a first terminal welding part are appropriately welded. <P>SOLUTION: The manufacturing method of a battery has a resistance welding process in which, when a first current collector terminal member 50 is plan-viewed in the thickness direction of an electrode body 40, a first terminal welding part 53 is arranged on a first metal welding part 44f contained in an adjoining metal part 44d of a first metal part 44, with a first terminal extension part 55 extending in a direction from the other end side power generation arc part 42c to the one end side power generation arc part 42b, and the first terminal welding part 53 and the first metal welding part 44f are pressure contacted in the thickness direction of the electrode body 40, and the first metal welding part 44f and the first terminal welding part 53 are resistance welded in the state where the first terminal extension part 55 and the first metal part 44 are separated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a battery and a manufacturing method thereof.

  As a space-efficient battery, a negative electrode plate (first electrode plate), a positive electrode plate (second electrode plate), and a separator are stacked and wound into a flat shape, and a rectangular parallelepiped housing this electrode body A battery including a shape battery case is known (see, for example, Patent Document 1). In the battery of Patent Document 1, the first current collecting terminal member that collects the charge of the negative electrode plate (first electrode plate) is the surface of the negative electrode winding portion (first metal portion) of the negative electrode plate (first electrode plate). It is welded to.

  In patent document 1, spot welding (resistance welding) is illustrated as a welding method of a 1st current collection terminal member and a negative electrode winding part (1st metal part). In the case of spot welding (resistance welding), for example, the first current collector terminal member and the metal sheet (first metal foil) forming the negative electrode winding portion are in pressure contact with each other in the thickness direction of the electrode body. Resistance welding (spot welding) is performed on the tip end portion (first terminal welding portion) of the electric terminal member and a part of the negative electrode winding portion (first metal welding portion).

JP 2007-18968 A

  By the way, in patent document 1, when resistance welding (spot welding) a 1st metal welding part and a 1st terminal welding part, a negative electrode winding part (1st metal part) and resistance welding among 1st current collection terminal members are carried out. Parts other than the first terminal welded part are also in contact with the negative electrode winding part (first metal part). Specifically, when resistance-welding the tip portion (first terminal welding portion) of the first current collecting terminal member and a part of the negative electrode winding portion (first metal welding portion), the first current collecting terminal member Resistance welding is performed in a state where a portion (first terminal extension portion) extending from the distal end portion (first terminal welding portion) to the negative electrode terminal side is in contact with the negative electrode winding portion (first metal portion).

  For this reason, at the time of resistance welding, there is a possibility that a splitting of the welding current occurs between the first terminal extension portion and the first metal portion, and spatter is generated. Due to the occurrence of sputtering, a part (foreign matter) of the first metal foil may be scattered and the foreign matter may adhere to the electrode body. As a result, foreign matter may be mixed inside the battery, which may reduce the reliability of the battery. Furthermore, there is a possibility that poor welding between the first metal welded portion and the first terminal welded portion may occur due to the influence of the shunt current of the welding current. Due to this influence, the reliability of the battery may be lowered.

  The present invention has been made in view of such a current situation, and mixing of foreign matters into the battery is suppressed, and the first metal portion and the first terminal welded portion are appropriately welded with high reliability. It is an object of the present invention to provide a battery and a manufacturing method thereof.

  In a battery manufacturing method comprising: an electrode body obtained by winding a first electrode plate, a second electrode plate, and a separator in a flat shape; and a first current collecting terminal member welded to the electrode body. The electrode body includes the power generation unit in which the first electrode plate, the second electrode plate, and the separator overlap, and the power generation unit adjacent to the power generation unit, and only the active material uncoated portion of the first electrode plate overlaps. A power generation flat portion, one end side power generation arc-shaped portion that forms one end of the power generation portion, and the other end side power generation arc-shaped portion that forms the other end of the power generation portion. The first metal part has a flat adjacent metal part adjacent to the power generation flat part, and the first current collecting terminal member constitutes a tip part of the first current collecting terminal member, A first terminal welded portion in contact with the surface of the first metal portion and welded to the first metal portion; A first terminal extension extending from the child weld, and when the first current collecting terminal member is viewed in plan in the thickness direction of the electrode body, the first terminal extension is in the form of the other-end-side power generation arc The first terminal welding portion is disposed on the first metal welding portion included in the adjacent metal portion of the first metal portion in a direction extending in a direction from the portion toward the one end side power generation arc-shaped portion, and the first terminal The welded portion and the first metal welded portion are pressed in the thickness direction of the electrode body, and the first metal welded portion and the first metal welded portion are separated from each other while the first terminal extension portion and the first metal portion are separated from each other. It is a manufacturing method of a battery provided with the resistance welding process of resistance-welding a 1 terminal welding part.

  In the manufacturing method of the present invention, the first metal welded portion and the first terminal welded portion are resistance welded in a state where the first terminal extension portion and the first metal portion of the first current collecting terminal member are separated from each other. Thereby, at the time of resistance welding, the shunting of the welding current between the first terminal extension portion and the first metal portion can be prevented, and the occurrence of spatter can be prevented. This prevents foreign matter from adhering to the electrode body due to the occurrence of sputtering, so that foreign matter can be prevented from entering the battery. Furthermore, poor welding between the first metal weld and the first terminal weld due to the influence of the shunt current of the welding current can also be suppressed. Therefore, according to the manufacturing method of the present invention, a highly reliable battery can be obtained.

  In the manufacturing method of the present invention, the first metal welded portion welded to the first terminal welded portion of the first current collecting terminal member is a flat adjacent metal portion (the active material uncoated portion of the first electrode plate is It is made to be included in a flat portion and a portion laminated in the thickness direction of the electrode body. That is, the first current collecting terminal member is resistance-welded at the flat adjacent metal portion of the first metal portion.

  Temporarily, the 1st current collection in the part (henceforth one end side metal arcuate part) which adjoins one end side power generation arc-shaped part among 1st metal parts, and the 1st active material uncoated part overlaps in an arc shape. When the terminal member is resistance welded, when the one end side metal arcuate part is pressed, large wrinkles (buckling) occur in the first metal foil (first active material uncoated part) forming the one end side metal arcuate part. This wrinkle extends to the first coating part. Thereby, malfunctions, such as a part of 1st electrode compound-material layer apply | coated on the surface of 1st metal foil peeling, may arise, and battery characteristics may fall large.

  On the other hand, if the first current collecting terminal member is resistance-welded at the flat adjacent metal part as in the manufacturing method of the present invention, the first metal foil that forms the adjacent metal part even if the adjacent metal part is pressed. Large wrinkles (buckling) do not occur in the (first active material uncoated portion), and there is no possibility of inconvenience such as part of the first electrode mixture layer peeling off.

In addition, the active material uncoated part of a 1st electrode plate means the site | part which consists only of metal foil (metal plate) which comprises a 1st electrode plate, without having the electrode compound-material layer containing an active material.
The power generation flat portion refers to a portion where the first electrode plate, the second electrode plate, and the separator are laminated in the thickness direction of the electrode body. The one-end-side power generation arc-shaped portion refers to a portion where the first electrode plate, the second electrode plate, and the separator overlap in an arc shape on one end side of the power-generation portion. The other end-side power generation arc-shaped portion refers to a portion where the first electrode plate, the second electrode plate, and the separator overlap in an arc shape on the other end side of the power generation unit.

  Further, in the battery manufacturing method, the first terminal extension portion of the first current collecting terminal member is bent from the first terminal welded portion and away from the surface of the first metal portion. A battery manufacturing method comprising: an extended first portion that extends; and an extended second portion that is bent from the extended first portion and extends in a direction from the other end-side power generation arc-shaped portion toward the one end-side power generation arc-shaped portion. good.

  By making the 1st current collection terminal member into the above-mentioned form, the 1st terminal extension part can be kept away from the surface of the 1st metal part. For this reason, when a 1st terminal welding part is pressed on the 1st metal welding part side, and the 1st terminal welding part and the 1st metal welding part are pressed, a 1st terminal extension part and a 1st metal part are made. It becomes easy to separate. For example, with two pressing members made of electrically insulating resin, a part of the first metal part excluding the first metal welded part (for example, a part close to the first metal welded part) When the first terminal extension portion and the first metal portion are separated from each other by pressing (compressing) in the thickness direction of the first terminal, even if the compression amount by the pressing member is reduced, the first terminal is surely The extension part and the first metal part can be separated from each other. For this reason, it can suppress that a wrinkle generate | occur | produces in a 1st metal part by the press (compression) of a press member.

  Furthermore, in any one of the battery manufacturing methods described above, the resistance welding step presses at least a part of the first metal portion excluding the first metal weld portion in the thickness direction of the electrode body. Then, when the first metal welded portion and the first terminal welded portion are resistance welded, the battery manufacturing method in which the first terminal extension portion and the first metal portion are separated from each other. good.

  In the manufacturing method of the present invention, in the resistance welding step, at least a part of the first metal part excluding the first metal weld part is pressed in the thickness direction of the electrode body, so that the first metal weld part and the first metal part are During the period of resistance welding between the one-terminal welded portion, the first terminal extension portion and the first metal portion are separated from each other. Specifically, for example, with two pressing members made of electrically insulating resin, a part of the first metal part excluding the first metal weld part (for example, a part close to the first metal weld part) ) In the thickness direction of the electrode body and pressed (compressed) to separate the first terminal extension portion and the first metal portion. Thereby, the shunting of the welding current between the first terminal extension portion and the first metal portion can be reliably prevented.

  Further, in the battery manufacturing method described above, the first metal part before welding to the first current collecting terminal member is adjacent to the one end side power generation arc-shaped part, and one end part of the first metal part is One end side metal arcuate part formed, the other end side metal arcuate part adjacent to the other end side power generation arcuate part and forming the other end part of the first metal part, the one end side metal arcuate part and the other end side metal And the adjacent metal portion that is flat between the arc-shaped portion, and the resistance welding step separates the first terminal welded portion of the first current collecting terminal member from the one-end-side metal arc-shaped portion. At least one flat end sandwiched between the first metal welded portion and the one end side metal arcuate portion. A part of the first metal welded portion and the first terminal welded portion are pressed in the thickness direction of the electrode body. The duration of resistance welding, may the method of manufacturing a battery so as to be brought into spaced and the first terminal extension portion and the first metal portion of the first collector terminal member.

In the manufacturing method of the present invention, in the resistance welding step, at least a part of the flat one end portion (a portion sandwiched between the first metal weld portion and the one end side metal arcuate portion) which is one end portion of the adjacent metal portion is used as the electrode body. Press in the thickness direction. Thereby, during the period of resistance welding between the first metal welded portion and the first terminal welded portion, the first metal portion (specifically, the flat one end portion and the one end side metal arc-shaped portion) is replaced with the first current collecting terminal member. The first terminal extension is separated from the first terminal extension. Thereby, the shunting of the welding current between the first terminal extension portion and the first metal portion can be reliably prevented.
In particular, in the manufacturing method of the present invention, the one end side metal arc-shaped portion is not pressed in the resistance welding step, so that the first metal foil (first active material uncoated portion) forming the first metal portion has a large wrinkle (buckling). Does not occur, and there is no risk that a part of the first electrode mixture layer peels off.

  In addition, one end side metal arc-shaped part means the site | part with which the active material uncoated part overlaps in the arc shape at the one end side of the 1st metal part. The other end-side metal arc-shaped portion refers to a portion where the active material uncoated portion overlaps in an arc shape on the other end side of the first metal portion.

  Alternatively, in the method for manufacturing the battery, the first metal portion before welding to the first current collecting terminal member is adjacent to the one end side power generation arc-shaped portion, and one end portion of the first metal portion is One end side metal arcuate part formed, the other end side metal arcuate part adjacent to the other end side power generation arcuate part and forming the other end part of the first metal part, the one end side metal arcuate part and the other end side metal And the adjacent metal portion that is flat between the arc-shaped portion, and the resistance welding step presses at least a part of the one-end-side metal arc-shaped portion of the first metal portion in the thickness direction of the electrode body. The first terminal extension portion of the first current collecting terminal member and the first metal portion are separated from each other during the period of resistance welding between the first metal weld portion and the first terminal weld portion. It is good to use the manufacturing method of the battery.

In the manufacturing method of the present invention, in the resistance welding step, at least a part of the one end side metal arc-shaped portion of the first metal portion is pressed in the thickness direction of the electrode body. Thereby, during the period of resistance welding the first metal welded portion and the first terminal welded portion, the first metal portion (specifically, the first terminal in the thickness direction of the first metal portion of the first metal portion). The part overlapping the extension part) is in a state of being separated from the first terminal extension part of the first current collecting terminal member. Thereby, the shunting of the welding current between the first terminal extension portion and the first metal portion can be reliably prevented.
When the one end side metal arcuate part is pressed in the thickness direction of the electrode body, the first metal foil forming the one end side metal arcuate part is pressed to such an extent that large wrinkles are not generated (does not buckle).

  Alternatively, in the method for manufacturing the battery, the first metal portion before welding to the first current collecting terminal member is adjacent to the one end side power generation arc-shaped portion, and one end portion of the first metal portion is One end side metal arcuate part formed, the other end side metal arcuate part adjacent to the other end side power generation arcuate part and forming the other end part of the first metal part, the one end side metal arcuate part and the other end side metal The flat adjacent metal part positioned between the arcuate part, and the width dimension of the first terminal extension of the first current collecting terminal member is smaller than the width dimension of the first metal part, In the resistance welding step, when the first terminal welded portion of the first current collecting terminal member is disposed on the surface of the first metal welded portion of the first metal portion, The portion located adjacent to the first terminal extension in the width direction of the first terminal extension is adjacent to the width direction. Then, during the period in which at least part of the adjacent portion in the width direction is pressed in the thickness direction of the electrode body and the first metal welded portion and the first terminal welded portion are resistance welded, the first current collector A battery manufacturing method may be used in which the first terminal extension portion of the terminal member and the first metal portion are separated from each other.

  In the manufacturing method of the present invention, in the resistance welding step, at least a part of the width direction adjacent portion of the first metal portion is pressed in the thickness direction of the electrode body. Thereby, during the period of resistance welding the first metal welded portion and the first terminal welded portion, the first metal portion (specifically, the first terminal in the thickness direction of the first metal portion of the first metal portion). The part overlapping the extension part) is in a state of being separated from the first terminal extension part of the first current collecting terminal member. Thereby, the shunting of the welding current between the first terminal extension portion and the first metal portion can be reliably prevented.

  The width dimension of the first terminal extension refers to a dimension in the width direction of the first terminal extension (which coincides with the direction in which the first metal part and the power generation part of the electrode body are adjacent to each other). The width dimension of a 1st metal part means the dimension concerning the width direction (1st metal part corresponds to the direction adjacent to a power generation part) of a 1st metal part.

  Further, in any one of the battery manufacturing methods, prior to the resistance welding step, the one end side metal arcuate part adjacent to the one end side power generation arcuate part and forming one end part of the first metal part, The other end side metal arcuate part adjacent to the other end side power generation arcuate part and forming the other end part of the first metal part, and a flat located between the one end side metal arcuate part and the other end side metal arcuate part A cutting step of cutting the one end side metal arcuate portion of the first metal portion comprising the adjacent metal portion, wherein the resistance welding step is one end portion of the adjacent metal portion, A battery for resistance-welding the first metal welded portion and the first terminal welded portion with the metal one end forming the one end portion of the first metal portion as the first metal welded portion after cutting the side metal arcuate portion It is good to use this manufacturing method.

  In the manufacturing method of the present invention, prior to the resistance welding step, the one end side metal arc-shaped portion of the first metal portion is cut off. Moreover, in the resistance welding process, the first metal welding is performed by using one end of the adjacent metal portion, which is one end of the first metal portion after the one end side metal arc-shaped portion is cut, as the first metal weld portion. The part and the first terminal weld are resistance welded. That is, the first terminal welding part of the first current collecting terminal member is resistance-welded to the metal one end part that has become one end part of the first metal part after the one end side metal arcuate part is cut off.

  For this reason, at the time of resistance welding, the first terminal extension portion of the first current collecting terminal member (extends in the direction from the other end side power generation arc shape portion toward the one end side power generation arc shape portion when viewed in the thickness direction of the electrode body) And the first metal part do not come into contact with each other. Therefore, the first metal welded portion and the first terminal welded portion can be resistance-welded in a state where the first terminal extension portion and the first metal portion of the first current collecting terminal member are separated from each other. Thereby, the shunting of the welding current between the first terminal extension portion and the first metal portion can be reliably prevented.

  Another solution is a battery comprising a first electrode plate, a second electrode plate, and an electrode body obtained by winding a separator in a flat shape, and a first current collecting terminal member welded to the electrode body. The electrode body includes the power generation unit in which the first electrode plate, the second electrode plate, and the separator overlap, and the power generation unit adjacent to the power generation unit, and only the active material uncoated portion of the first electrode plate overlaps. A power generation flat portion, one end side power generation arc-shaped portion that forms one end of the power generation portion, and the other end side power generation arc-shaped portion that forms the other end of the power generation portion. The first current collecting terminal member is a first terminal that forms the tip of the first current collecting terminal member, contacts the surface of the first metal portion, and is welded to the first metal portion. A welded portion and a first terminal extension extending from the first terminal welded portion. Without having a portion adjacent to the arcuate part, adjacent to the power generation flat part, adjacent metal part including one end of the metal forming one end of the first metal part, and adjacent to the other end side power generation arcuate part, The other end side metal arcuate portion forming the other end portion of the first metal portion, and when the first current collecting terminal member is viewed in plan in the thickness direction of the electrode body, the first terminal extension portion is The first terminal welded portion of the first current collecting terminal member extends in a direction extending from the other end-side power generation arc-shaped portion toward the one end-side power generation arc-shaped portion, and the metal one end portion of the first metal portion and the resistance The battery is welded.

  In the battery according to the present invention, the first metal part includes a first metal part including an adjacent metal part adjacent to the power generation flat part and an other end side metal arc part adjacent to the other end side power generation arc part. . That is, unlike the conventional battery, the first active material uncoated portion overlaps in an arc shape at a position adjacent to the one-end-side power generation arc-shaped portion, despite having an electrode body wound in a flat shape. It does not have one end side metal arcuate part. And the 1st terminal welding part of the 1st current collection terminal member is resistance-welded with the metal one end part of the 1st metal part which makes the one end part of the 1st metal part. In this way, the first terminal welding portion of the first current collecting terminal member is resistance-welded to the one end portion of the first metal portion so that the first terminal extension portion (the first current collecting terminal member) When the one current collecting terminal member is viewed in plan in the thickness direction of the electrode body, the first metal portion does not come into contact with the first current generating arc-shaped portion extending from the other end-side power generating arc-shaped portion. Therefore, the first metal welded portion and the first terminal welded portion can be resistance-welded in a state where the first terminal extension portion and the first metal portion of the first current collecting terminal member are separated from each other.

  Therefore, in the battery of the present invention, when the first metal welded portion and the first terminal welded portion are resistance welded, the first metal due to the adhesion of foreign matter to the electrode body due to the occurrence of spatter and the influence of the shunt current of the welding current. It can be said that welding failure between the welded portion and the first terminal welded portion is suppressed. For this reason, the battery of the present invention is a highly reliable battery in which foreign matter is prevented from entering the battery and the first metal part and the first terminal weld part are appropriately welded.

Example 1
Before describing the manufacturing method of the battery according to Example 1, the battery 1 manufactured by the manufacturing method of Example 1 will be described.
As shown in FIG. 1, the battery 1 includes a rectangular parallelepiped battery case 70 including a lid member 71 and a battery case main body 72, and an electrode body 40 accommodated in the battery case 70. The electrode body 40 is an electrode body (see FIGS. 4 and 5) in which the first electrode plate 10, the second electrode plate 20, and the separator 30 are stacked and wound into a flat shape.

  As shown in FIG. 2, the first electrode plate 10 extends along one side 10b in the longitudinal direction (vertical direction in FIG. 2) in which the first metal foil 11 extends, and the first metal foil 11 and the first electrode mixture The first coating part 14 having the layer 12, the first metal foil adjacent to the first coating part 14, extending along one side 10 b in the longitudinal direction, and without having the first electrode mixture layer 12. 11 and a first active material uncoated portion 13. In the first embodiment, a copper foil is used as the first metal foil 11. Moreover, the 1st electrode compound-material layer 12 is comprised by the 1st electrode active material, a binder, etc. Among these, as the first electrode active material, for example, natural graphite can be used.

  As shown in FIG. 3, the second electrode plate 20 extends along one side 20 b in the longitudinal direction (vertical direction in FIG. 3) in which the second metal foil 21 extends, and the second metal foil 21 and the second electrode mixture The second coating portion 24 having the layer 22, the second metal foil adjacent to the second coating portion 24, extending along one side 20 b in the longitudinal direction, and without having the second electrode mixture layer 22. And a second uncoated portion 23 composed of 21. In the first embodiment, an aluminum foil is used as the second metal foil 21. The second electrode mixture layer 22 is composed of a second electrode active material, a binder, or the like. Among these, as the second electrode active material, for example, lithium nickelate can be used.

  The electrode body 40 includes a power generation unit 42 in which the first coating unit 14 of the first electrode plate 10 and the second coating unit 24 of the second electrode plate 20 overlap with each other via the separator 30, and one side of the power generation unit 42. (The left side in FIG. 1), the first metal part 44 that is wound and overlaps only the first active material uncoated part 13 (first metal foil 11), and the other side of the power generation part 42 (in FIG. 1) 2nd metal part 46 which adjoins the 2nd uncoated part 23 (2nd metal foil 21), and overlaps.

  The power generation unit 42 forms one end of the power generation unit 42 (the upper end in FIGS. 1 and 5), and the first coating unit 14, the second coating unit 24, and the separator 30 overlap each other in an arc shape. The arc-shaped part 42b and the other end part (the lower end part in FIG.1 and FIG.5) of the electric power generation part 42 are comprised, and the other end which the 1st coating part 14, the 2nd coating part 24, and the separator 30 overlap in an arc shape. The first coating part 14, the second coating part 24, and the separator 30 are in a planar shape, located between the side power generation arc part 42c, the one end side power generation arc part 42b, and the other end side power generation arc part 42c. The power generation flat portion 42d is laminated in the thickness direction of the electrode body 40 (the direction orthogonal to the paper surface in FIG. 1).

  A first current collecting terminal member 50 that collects charges of the first electrode plate 10 is resistance-welded to the first metal portion 44 of the electrode body 40. The first current collecting terminal member 50 forms a tip portion of the first current collecting terminal member 50, contacts the surface of the first metal portion 44, and is welded to the first metal portion 44. And a first terminal extension 55 extending from the first terminal weld 53. Furthermore, it has a flat plate-shaped flange portion 57 connected to the first terminal extension portion 55 and a first electrode terminal 59 erected on the flange portion 57 (see FIG. 1).

  The first terminal extension 55 is located on the surface of the first metal part 44. Specifically, when the first terminal extension 55 is viewed in plan in the thickness direction of the electrode body 40 (when viewed from the front to the back in FIG. 1), the surface of the first metal part 44 is It extends in the direction from the other end side power generation arc-shaped portion 42c to the one end side power generation arc-shaped portion 42b (the direction from bottom to top in FIG. 1). Specifically, as shown in FIG. 10, the first terminal extension portion 55 is bent from the first terminal weld portion 53 and extends in a direction away from the surface 44 g of the first metal portion 44 (upward in FIG. 10). A first portion 55b and an extended second portion that is bent from the extended first portion 55b and extends in the direction from the other end side power generation arc portion 42c toward the one end side power generation arc portion 42b (the direction from right to left in FIG. 10). 55c. 10 corresponds to a cross-sectional view taken along the line AA in FIG.

  Further, a second current collecting terminal member 60 that collects electric charges of the second electrode plate 20 is ultrasonically welded to the second metal portion 46 of the electrode body 40. Similarly to the first current collecting terminal member 50, the second current collecting terminal member 60 also has a second terminal welded portion 63 welded to the second metal portion 46 and a second terminal extension extending from the second terminal welded portion 63. Part 65.

Next, a method for manufacturing the battery according to Example 1 will be described below.
First, as shown in FIG. 2, the 1st electrode board 10 by which the 1st electrode compound-material layer 12 was coated on the surface of the strip | belt-shaped 1st metal foil 11 is prepared. Furthermore, as shown in FIG. 3, a second electrode plate 20 is prepared in which a second electrode mixture layer 22 is arranged on the surface of a strip-shaped second metal foil 21.

  Next, as shown in FIG. 4, the second electrode plate 20, the separator 30, the first electrode plate 10, and the separator 30 are laminated in this order. Specifically, the first active material uncoated portion 13 of the first electrode plate 10 and the second uncoated portion 23 of the second electrode plate 20 face each other in the width direction (left-right direction in FIG. 4). In the orientation, the first active material uncoated portion 13 does not overlap the separator 30 and the second electrode plate 20, and the second uncoated portion 23 does not overlap the separator 30 and the first electrode plate 10. Laminate as follows. Thereafter, the stacked second electrode plate 20, separator 30, first electrode plate 10, and separator 30 are wound into a flat shape to form an electrode body 40 (see FIG. 5).

  The first metal part 44 of the electrode body 40 includes one end side metal arcuate part 44b that forms one end part (the upper end part in FIG. 5) of the first metal part 44 and the other end part (the lower end in FIG. 5). ), And an adjacent metal portion 44d located between the one end side metal arc portion 44b and the other end side metal arc portion 44c. Among these, the one end side metal arcuate part 44b is adjacent to the one end side power generation arcuate part 42b of the power generation part 42, and the first active material uncoated part 13 overlaps in an arc shape. The other end side metal arcuate part 44c is adjacent to the other end side power generation arcuate part 42c of the power generation part 42, and the first active material uncoated part 13 overlaps in an arc shape. The adjacent metal part 44d is adjacent to the power generation flat part 42d of the power generation part 42, the first active material uncoated part 13 is formed in a planar shape and laminated in the thickness direction of the electrode body 40, and the first current collecting terminal A first metal weld 44f to be welded to the first terminal weld 53 of the member 50 is included.

  In addition, a first current collecting terminal member 50 (see FIGS. 6 and 7) for collecting the electric charge of the first electrode plate 10 is prepared. The first current collecting terminal member 50 is preferably made of the same material (copper) as the first metal foil 11. Furthermore, the 2nd current collection terminal member 60 (refer FIG. 1) which collects the electric charge of the 2nd electrode board 20 is prepared.

  A flat lid member 71 is prepared, and cylindrical insulating members 75 and 76 made of electrically insulating resin are fitted into the through holes 71 b and 71 c of the lid member 71. Further, the first electrode terminal 59 of the first current collecting terminal member 50 is inserted through the through hole of the insulating member 75 and fixed, and the second electrode terminal 69 of the second current collecting terminal member 60 is passed through the insulating member 76. Insert it into the hole and fix it. Thereby, the 1st current collection terminal member 50 and the 2nd current collection terminal member 60 are fixed to lid member 71 (refer to Drawing 1).

  Next, it progresses to a resistance welding process, and resistance welding (specifically spot welding) of the 1st metal welding part 44f of the 1st metal part 44 and the 1st terminal welding part 53 of the 1st current collection terminal member 50 is carried out. . Specifically, as shown in FIGS. 6 and 7, first, the first terminal welding portion 53 of the first current collecting terminal member 50 is positioned away from the one end side metal arcuate portion 44 b of the first metal portion 44. It arrange | positions on the surface of the 1st metal welding part 44f (part of adjacent metal part 44d) to perform. However, when the first terminal extension 55 is viewed in plan in the thickness direction of the electrode body 40 (when viewed from the front to the back in FIGS. 1 and 6), the first terminal extension 55 is connected to the other end. The first current collecting terminal member 50 is arranged in a direction extending from the side power generation arc-shaped portion 42c toward the one end-side power generation arc-shaped portion 42b (from right to left in FIG. 6).

  FIG. 6 is a plan view of the electrode body 40 in which the first current collecting terminal member 50 is disposed as viewed from above the electrode body 40 in the thickness direction of the electrode body 40. 6 and 7, the boundary between the one end side metal arcuate portion 44b and the adjacent metal portion 44d of the first metal portion 44 and the boundary between the adjacent metal portion 44d and the other end side metal arcuate portion 44c are defined as two. It is indicated by a dotted line. Moreover, in FIG.7 and FIG.9, illustration of the power generation part 42 grade | etc., Is abbreviate | omitted.

  Thereafter, as shown in FIGS. 8 and 9, the first metal foil 11 and the first terminal weld 53 forming the first metal weld 44 f are formed by the first electrode 91 and the second electrode 92 of the resistance welder 90. The electrode body 40 is pressed and sandwiched in the thickness direction (vertical direction in FIG. 9). At the same time, the first pressing member 81 and the second pressing member 82 of the pressing device 80 are sandwiched between one end portion of the adjacent metal portion 44d and the first metal welding portion 44f and the one end side metal arcuate portion 44b. A part of the flat one end 44h is sandwiched and pressed in the thickness direction of the electrode body 40 (vertical direction in FIG. 9). In the first embodiment, the portion located adjacent to the first terminal extension 55 in the width direction (vertical direction in FIG. 8) of the first terminal extension 55 in the flat one end 44h is pressed.

As a result, as shown in FIG. 9, the first terminal extension 55 of the first current collecting terminal member 50 is brought into pressure contact with the first metal foil 11 and the first terminal weld 53 forming the first metal weld 44 f. And the first metal part 44 (specifically, the flat one end part 44h and the one end side metal arcuate part 44b) can be separated from each other with a gap G1.
In addition, the 1st press member 81 and the 2nd press member 82 are formed with resin which has electrical insulation.

Next, in this state, a current is passed between the first electrode 91 and the second electrode 92, and the first metal weld 44f and the first terminal weld 53 are resistance-welded. In the first embodiment, the pressure between the first electrode 91 and the second electrode 92 is 100 kgf (980 N), the welding current value is 7000 A, and the welding current energizing time is 100 ms.
Thereafter, the first electrode 91 and the second electrode 92 are separated from the first terminal welded portion 53 and the first metal welded portion 44f, and the first pressing member 81 and the second pressing member 82 are separated from the flat one end portion 44h. Then, the resistance welding process is completed.

  Thus, in the present Example 1, the 1st terminal extension part 55 of the 1st current collection terminal member 50 and the 1st metal part during the period which carries out resistance welding of the 1st metal welding part 44f and the 1st terminal welding part 53. 44 (specifically, the flat one end 44h and the one end side metal arc 44b) are separated from each other. Thereby, at the time of resistance welding, the shunting of the welding current between the 1st terminal extension part 55 and the 1st metal part 44 can be prevented, and generation | occurrence | production of a spatter can be prevented. Thereby, since adhesion of the foreign material to the electrode body 40 accompanying generation | occurrence | production of a sputter | spatter can be prevented, mixing of the foreign material inside a battery can be suppressed. Furthermore, poor welding between the first metal weld 44f and the first terminal weld 53 due to the influence of the shunt current of the welding current can also be suppressed. Therefore, as shown in FIG. 10, the first metal weld 44f and the first terminal weld 53 can be reliably welded.

  Moreover, in the first embodiment, the adjacent metal portion 44d (specifically, the flat one end) is not pressed by the first pressing member 81 and the second pressing member 82 of the pressing device 80 without pressing the one end side metal arcuate portion 44b. A portion of the portion 44h) is pressed, so that large wrinkles (buckling) occur in the first metal foil 11 (the first active material uncoated portion 13) forming the adjacent metal portion 44d and the one end side metal arc-shaped portion 44b. There is no. Thereby, malfunctions, such as a part of 1st electrode compound-material layer 12, peeling, can be prevented.

  Next, the second metal part 46 of the electrode body 40 and the second terminal welding part 63 of the second current collecting terminal member 60 are ultrasonically welded. Thereafter, the electrode body 40 to which the first current collecting terminal member 50 and the second current collecting terminal member 60 are welded is accommodated in the rectangular battery case main body 72, and the lid member 71 opens the opening of the battery case main body 72. 72d is closed. Next, after the lid member 71 and the battery case main body 72 are welded, an electrolytic solution is injected into the battery case 70 through a liquid injection hole (not shown). Thereafter, the liquid injection hole is sealed to complete the battery 1 (see FIG. 1). The lid member 71 and the battery case body 72 are welded to form a battery case 70 in which both members are integrated.

(Example 2)
Next, a battery manufacturing method according to Example 2 will be described.
First, an electrode body 40 is formed in the same manner as in Example 1 (see FIG. 5). In addition, a first current collecting terminal member 150 (see FIGS. 11 and 12) for collecting electric charges of the first electrode plate 10 is prepared. In addition, the 1st current collection terminal member 150 differs in the form of the 1st terminal extension part compared with the 1st current collection terminal member 50 of Example 1. FIG. Specifically, in the first current collecting terminal member 150, the extended first portion 155b and the extended second portion 155c are bent at a position closer to the flange portion 57 than the first current collecting terminal member 50 (left side in FIG. 12). is doing. Furthermore, the 2nd current collection terminal member 60 (refer FIG. 1) is prepared similarly to Example 1. FIG. Thereafter, in the same manner as in the first embodiment, the first current collecting terminal member 150 and the second current collecting terminal member 60 are fixed to the lid member 71.

  Next, it progresses to a resistance welding process, and resistance welding (specifically spot welding) of the 1st metal welding part 44f of the 1st metal part 44 and the 1st terminal welding part 153 of the 1st current collection terminal member 150 is carried out. . Specifically, as shown in FIGS. 11 and 12, first, the first terminal welded portion 153 of the first current collecting terminal member 150 is placed on the surface of the first metal welded portion 44f included in the adjacent metal portion 44d. Deploy. In FIGS. 11 and 12, the boundary between the one end side metal arcuate portion 44b and the adjacent metal portion 44d of the first metal portion 44 and the boundary between the adjacent metal portion 44d and the other end side metal arcuate portion 44c are defined as two. It is indicated by a dotted line. In addition, in FIG. 12, FIG. 14, and FIG. 16, the power generation unit 42 and the like are not shown.

  Next, as shown in FIGS. 13 and 14, the first arcing member 181 and the second pressing member 182 of the pressing device 180 connect the one end side metal arcuate portion 44 b of the first metal portion 44 in the thickness direction of the electrode body 40. It is pressed (compressed) across (in the vertical direction in FIG. 14). However, the one end side metal arcuate portion 44b is pressed (compressed) to such an extent that large wrinkles are not generated (not buckled) in the first metal foil 11 forming the one end side metal arcuate portion 44b. In addition, the 1st press member 181 and the 2nd press member 182 are formed with resin which has electrical insulation.

  Thereafter, in this state, similarly to the first embodiment, the first metal foil 11 and the first terminal welded portion 53 forming the first metal welded portion 44f are composed of the first electrode 91 and the second electrode 92 of the resistance welder 90. Is pressed in the thickness direction of the electrode body 40 (vertical direction in FIG. 16). At this time, as shown in FIG. 16, the first terminal extension portion 155 and the first metal portion 44 of the first current collecting terminal member 150 (specifically, in the thickness direction of the electrode body 40 in the first metal portion 44). A portion 44j overlapping with the first terminal extension 155, that is, a portion located on the left side of the first metal weld 44f in FIG. 16 can be separated from the first metal welded portion 44f with a gap G2. First, the first pressing member 181 and the second pressing member 182 press (compress) the one end side metal arcuate portion 44b of the first metal portion 44 in the thickness direction (vertical direction in FIG. 16) of the electrode body 40. ).

Next, in this state, a current is passed between the first electrode 91 and the second electrode 92, and the first metal weld 44f and the first terminal weld 153 are resistance welded. In Example 2, the pressure between the first electrode 91 and the second electrode 92 is 100 kgf (980 N), the welding current value is 7000 A, and the welding current energizing time is 100 ms.
Thereafter, the first electrode 91 and the second electrode 92 are separated from the first terminal welded portion 153 and the first metal welded portion 44f, and the first pressing member 181 and the second pressing member 182 are connected to the one end side metal arcuate portion 44b. (See FIG. 17), the resistance welding process is completed.

  As described above, also in the second embodiment, the first terminal extension portion 155 and the first metal portion of the first current collecting terminal member 150 are subjected to resistance welding between the first metal weld portion 44f and the first terminal weld portion 153. 44 is in a separated state. Thereby, at the time of resistance welding, the shunt of the welding current between the 1st terminal extension part 155 and the 1st metal part 44 can be prevented, and generation | occurrence | production of a spatter can be prevented. Thereby, since adhesion of the foreign material to the electrode body 40 accompanying generation | occurrence | production of a sputter | spatter can be prevented, mixing of the foreign material inside a battery can be suppressed. Furthermore, poor welding between the first metal weld 44f and the first terminal weld 153 due to the influence of the split current of the welding current can also be suppressed. Accordingly, as shown in FIG. 17, the first metal weld 44f and the first terminal weld 153 can be reliably welded.

  Thereafter, similarly to the first embodiment, the second metal portion 46 of the electrode body 40 and the second terminal welding portion 63 of the second current collecting terminal member 60 are ultrasonically welded. Thereafter, the electrode body 40 to which the first current collecting terminal member 150 and the second current collecting terminal member 60 are welded is accommodated in the rectangular battery case main body 72, and the lid member 71 opens the opening of the battery case main body 72. 72d is closed. Next, after the lid member 71 and the battery case main body 72 are welded, an electrolytic solution is injected into the battery case 70 through a liquid injection hole (not shown). Thereafter, the liquid injection hole is sealed to complete the battery 100 (see FIG. 1).

(Example 3)
Next, a battery manufacturing method according to Example 3 will be described.
First, an electrode body 40 is formed in the same manner as in Example 1 (see FIG. 5). In addition, a first current collecting terminal member 250 (see FIGS. 18 and 19) for collecting electric charges of the first electrode plate 10 is prepared. In addition, the 1st current collection terminal member 250 differs in the form of the 1st terminal extension part compared with the 1st current collection terminal member 50 of Example 1. FIG. Specifically, in the first current collecting terminal member 250, the width dimension X of the first terminal extension is smaller than that of the first current collecting terminal member 50, and is ½ or less of the width dimension Y of the first metal part 44. It has become. Furthermore, the 2nd current collection terminal member 60 (refer FIG. 1) is prepared similarly to Example 1. FIG. Thereafter, similarly to the first embodiment, the first current collecting terminal member 250 and the second current collecting terminal member 60 are fixed to the lid member 71.

  Next, it progresses to a resistance welding process, and resistance welding (specifically spot welding) of the 1st metal welding part 44f of the 1st metal part 44 and the 1st terminal welding part 253 of the 1st current collection terminal member 250 is carried out. . Specifically, as shown in FIGS. 18 and 19, first, the first terminal welded portion 253 of the first current collecting terminal member 250 is placed on the surface of the first metal welded portion 44f included in the adjacent metal portion 44d. Deploy. 18 and 19, the boundary between the one end side metal arcuate portion 44b and the adjacent metal portion 44d of the first metal portion 44 and the boundary between the adjacent metal portion 44d and the other end side metal arcuate portion 44c are defined as two. It is indicated by a dotted line. Moreover, in FIG.19 and FIG.21, illustration of the electric power generation part 42 grade | etc., Is abbreviate | omitted.

  Thereafter, as shown in FIGS. 20 and 21, the first metal foil 11 and the first terminal welding portion 253 forming the first metal welding portion 44 f are formed by the first electrode 91 and the second electrode 92 of the resistance welding machine 90. The electrode body 40 is pressed and sandwiched in the thickness direction (vertical direction in FIG. 21). At the same time, the first pressing member 281 and the second pressing member 282 of the pressing device 280 use the first metal extension 44 in the width direction adjacent portion 44k (when viewed in the thickness direction of the electrode body 40, the first terminal extension portion). A part of the portion 255 adjacent to the first terminal extension 255 in the width direction (vertical direction in FIG. 20) is sandwiched and pressed in the thickness direction of the electrode body 40 (vertical direction in FIG. 21).

  Accordingly, as shown in FIG. 21, the first terminal extension portion 255 of the first current collecting terminal member 250 is pressed while the first metal foil 11 forming the first terminal weld portion 253 and the first metal weld portion 44f is pressed. And the first metal portion 44 (specifically, the portion 44m of the first metal portion 44 that overlaps the first terminal extension portion 255 in the thickness direction of the electrode body 40) with a gap G3 therebetween. it can. In addition, the 1st press member 281 and the 2nd press member 282 are formed with resin which has electrical insulation.

Next, in this state, a current is passed between the first electrode 91 and the second electrode 92, and the first metal weld 44f and the first terminal weld 253 are resistance welded. In Example 3, the pressure contact between the first electrode 91 and the second electrode 92 is 100 kgf (980 N), the welding current value is 7000 A, and the welding current energizing time is 100 ms.
Then, while separating the 1st electrode 91 and the 2nd electrode 92 from the 1st terminal welding part 253 and the 1st metal welding part 44f, the 1st press member 281 and the 2nd press member 282 are separated from the width direction adjacent part 44k. After the separation (see FIG. 22), the resistance welding process is completed.

  Thus, also in the third embodiment, the first terminal extension portion 255 and the first metal portion of the first current collecting terminal member 250 during the period of resistance welding between the first metal weld portion 44f and the first terminal weld portion 253. 44 is in a separated state. Thereby, at the time of resistance welding, the shunting of the welding current between the 1st terminal extension part 255 and the 1st metal part 44 can be prevented, and generation | occurrence | production of a spatter can be prevented. Thereby, since adhesion of the foreign material to the electrode body 40 accompanying generation | occurrence | production of a sputter | spatter can be prevented, mixing of the foreign material inside a battery can be suppressed. Furthermore, poor welding between the first metal weld 44f and the first terminal weld 253 due to the influence of the shunt current of the welding current can also be suppressed. Therefore, as shown in FIG. 22, the first metal weld 44f and the first terminal weld 253 can be reliably welded.

  Thereafter, similarly to the first embodiment, the second metal portion 46 of the electrode body 40 and the second terminal welding portion 63 of the second current collecting terminal member 60 are ultrasonically welded. Thereafter, the electrode body 40 to which the first current collecting terminal member 250 and the second current collecting terminal member 60 are welded is accommodated in the battery case main body 72 having a rectangular parallelepiped shape, and the opening portion of the battery case main body 72 is formed by the lid member 71. 72d is closed. Next, after the lid member 71 and the battery case main body 72 are welded, an electrolytic solution is injected into the battery case 70 through a liquid injection hole (not shown). Thereafter, the liquid injection hole is sealed to complete the battery 200 (see FIG. 1).

Example 4
Next, a battery 300 according to Example 4 will be described.
As shown in FIG. 23, the battery 300 is different from the battery 100 manufactured in Example 2 in the electrode body. Specifically, the electrode body 340 is obtained by cutting out one end side metal arcuate part 44b of the first metal part 44 with respect to the electrode body 40. That is, as shown in FIG. 29, the electrode body 340 has the first metal portion 344 including the adjacent metal portion 44d and the other end side metal arc portion 44c without having the one end side metal arc portion 44b. . Further, the first terminal welded portion 153 of the first current collecting terminal member 150 is resistance-welded to a metal one end portion 344 n that forms one end portion of the first metal portion 344. That is, the metal one end portion 344n is a first metal weld portion 344f.

Next, a battery manufacturing method according to Example 4 will be described.
First, an electrode body 40 is formed in the same manner as in Example 2 (see FIG. 5). Moreover, the 1st current collection terminal member 150 and the 2nd current collection terminal member 60 are prepared similarly to Example 2. FIG. Thereafter, similarly to the second embodiment, the first current collecting terminal member 150 and the second current collecting terminal member 60 are fixed to the lid member 71.

  Next, the process proceeds to an excision step, and one end side metal arcuate part 44b (part indicated by hatching in FIG. 24) is excised from the first metal part 44 of the electrode body 40 by a cutting machine (not shown). Here, the electrode body 340 is formed by cutting off the one end side metal arcuate portion 44b from the electrode body 40, and the first metal portion 344 is formed by cutting off the one end side metal arcuate portion 44b from the first metal portion 44 ( (See FIG. 25 and FIG. 26).

At this time, one end portion of the adjacent metal portion 44d becomes a metal one end portion 344n forming one end portion of the first metal portion 344. A part of the metal one end 344n becomes a first metal weld 344f welded to the first terminal weld 153 of the first current collecting terminal member 150.
FIG. 24 is a plan view of the electrode body 40, and shows a part of the electrode body 40 when the electrode body 40 is viewed in the thickness direction.

  Next, the process proceeds to a resistance welding process, in which the first metal welding part 344f (metal one end part 344n) of the first metal part 344 and the first terminal welding part 153 of the first current collecting terminal member 150 are resistance welded (specifically, (Spot welding). Specifically, as shown in FIGS. 25 and 26, first, the first terminal welded portion 153 of the first current collecting terminal member 150 is disposed on the surface of the first metal welded portion 344f (metal one end portion 344n). To do. 26 and 28, the power generation unit 42 and the like are not shown.

  Thereafter, as shown in FIGS. 27 and 28, the first metal foil 11 and the first metal foil 11 forming the first metal welded portion 344f (the metal one end portion 344n) are formed by the first electrode 91 and the second electrode 92 of the resistance welder 90. The one-terminal welded portion 153 is pressed and sandwiched in the thickness direction of the electrode body 340 (vertical direction in FIG. 28). At this time, the first terminal extension portion 155 and the first metal portion 344 of the first current collecting terminal member 150 can be separated from each other. This is because the one end side metal arcuate portion 44b of the first metal portion 344 is cut in the previous cutting step.

Next, in this state, a current is passed between the first electrode 91 and the second electrode 92, and the first metal weld 344f (metal one end 344n) and the first terminal weld 153 are resistance-welded. In the fourth embodiment, the pressure between the first electrode 91 and the second electrode 92 is 100 kgf (980 N), the welding current value is 7000 A, and the welding current energizing time is 100 ms.
Thereafter, the first electrode 91 and the second electrode 92 are separated from the first terminal welded portion 153 and the first metal welded portion 344f (metal one end portion 344n) (see FIG. 29), and the resistance welding process is finished.

  Thus, also in the present Example 4, the first terminal extension portion 155 and the first metal portion of the first current collecting terminal member 150 during the period of resistance welding between the first metal weld portion 344f and the first terminal weld portion 153. 344 is separated from 344. Thereby, at the time of resistance welding, the shunting of the welding current between the 1st terminal extension part 155 and the 1st metal part 344 can be prevented, and generation | occurrence | production of a spatter can be prevented. This prevents foreign matter from adhering to the electrode body 340 due to the occurrence of sputtering, so that foreign matter can be prevented from entering the battery. Furthermore, poor welding between the first metal welded portion 344f and the first terminal welded portion 153 due to the influence of the shunt current of the welding current can also be suppressed. Therefore, as shown in FIG. 29, the first metal weld 344f and the first terminal weld 153 can be reliably welded.

  Thereafter, in the same manner as in Example 2, the second metal portion 46 of the electrode body 340 and the second terminal welding portion 63 of the second current collecting terminal member 60 are ultrasonically welded. Thereafter, the electrode body 340 to which the first current collecting terminal member 150 and the second current collecting terminal member 60 are welded is accommodated in the rectangular parallelepiped battery case main body 72, and the opening portion of the battery case main body 72 is covered by the lid member 71. 72d is closed. Next, after the lid member 71 and the battery case main body 72 are welded, an electrolytic solution is injected into the battery case 70 through a liquid injection hole (not shown). Thereafter, the liquid injection hole is sealed to complete the battery 300 (see FIG. 23).

  In the above, the present invention has been described with reference to the first to fourth embodiments. However, the present invention is not limited to the above-described embodiments and the like, and can be applied with appropriate modifications without departing from the gist thereof. Not too long.

It is a longitudinal cross-sectional view of the battery concerning Examples 1-3. It is a figure which shows the 1st electrode plate concerning Examples 1-4. It is a figure which shows the 2nd electrode plate concerning Examples 1-4. It is a figure explaining the process of laminating | stacking and winding a 1st electrode plate, a 2nd electrode plate, and a separator. It is a side view of the electrode body which laminated | stacked the 1st electrode plate, the 2nd electrode plate, and the separator, and was wound by flat shape. It is explanatory drawing explaining the resistance welding process concerning Example 1. FIG. It is explanatory drawing explaining the resistance welding process concerning Example 1, and is equivalent to the BB arrow sectional drawing of FIG. It is explanatory drawing explaining the resistance welding process concerning Example 1. FIG. It is explanatory drawing explaining the resistance welding process concerning Example 1, and is equivalent to CC sectional view taken on the line of FIG. It is a figure which shows the 1st current collection terminal member and the 1st metal part resistance-welded, and is equivalent to the AA arrow sectional drawing of FIG. It is explanatory drawing explaining the resistance welding process concerning Example 2. FIG. It is explanatory drawing explaining the resistance welding process concerning Example 2, and is equivalent to the DD arrow sectional drawing of FIG. It is explanatory drawing explaining the resistance welding process concerning Example 2. FIG. It is explanatory drawing explaining the resistance welding process concerning Example 2, and is equivalent to the EE arrow sectional drawing of FIG. It is explanatory drawing explaining the resistance welding process concerning Example 2. FIG. It is explanatory drawing explaining the resistance welding process concerning Example 2, and is equivalent to the FF arrow sectional drawing of FIG. It is a figure which shows the 1st current collection terminal member and the 1st metal part resistance-welded, and is equivalent to the AA arrow sectional drawing of FIG. It is explanatory drawing explaining the resistance welding process concerning Example 3. FIG. It is explanatory drawing explaining the resistance welding process concerning Example 3, and is equivalent to the HH arrow sectional drawing of FIG. It is explanatory drawing explaining the resistance welding process concerning Example 3. FIG. It is explanatory drawing explaining the resistance welding process concerning Example 3, and is equivalent to the JJ arrow sectional drawing of FIG. It is a figure which shows the 1st current collection terminal member and the 1st metal part resistance-welded, and is equivalent to the AA arrow sectional drawing of FIG. 6 is a diagram showing a battery according to Example 4. FIG. It is explanatory drawing explaining the cutting process concerning Example 4. FIG. It is explanatory drawing explaining the resistance welding process concerning Example 4. FIG. It is explanatory drawing explaining the resistance welding process concerning Example 4, and is equivalent to KK arrow sectional drawing of FIG. It is explanatory drawing explaining the resistance welding process concerning Example 4. FIG. It is explanatory drawing explaining the resistance welding process concerning Example 4, and is equivalent to LL arrow sectional drawing of FIG. It is a figure which shows the 1st metal collection terminal member and the 1st metal part resistance-welded, and is equivalent to the MM arrow sectional drawing of FIG.

Explanation of symbols

1, 100, 200, 300 Battery 10 First electrode plate 11 First metal foil 12 First electrode mixture layer 13 First active material uncoated portion (active material uncoated portion)
14 1st coating part 20 2nd electrode plate 30 Separator 40,340 Electrode body 42 Power generation part 42b One end side power generation arc-shaped part 42c Other end side power generation arc-shaped part 42d Power generation flat part 44,344 First metal part 44b One end side metal arc shape Part 44c other end side metal arcuate part 44d adjacent metal part 44f, 344f first metal welded part 44h flat one end part 44k width direction adjacent part 344n metal one end part 50, 150, 250 first current collecting terminal members 53, 153, 253 first 1 terminal welding part 55,155,255 1st terminal extension part 55b, 155b, 255b 1st extension part 55c, 155c, 255c 2nd extension part

Claims (8)

An electrode body obtained by winding the first electrode plate, the second electrode plate, and the separator into a flat shape;
In the manufacturing method of a battery comprising the first current collecting terminal member welded to the electrode body,
The electrode body is
A power generation unit in which the first electrode plate, the second electrode plate, and the separator overlap; and
A first metal part that is adjacent to the power generation part and that only the active material uncoated part of the first electrode plate overlaps;
The power generation part has a power generation flat part, one end side power generation arc-shaped part forming one end part of the power generation part, and the other end side power generation arc-shaped part forming the other end part of the power generation part,
The first metal part has a flat adjacent metal part adjacent to the power generation flat part,
The first current collecting terminal member is
A first terminal welding portion that forms a tip portion of the first current collecting terminal member, contacts the surface of the first metal portion, and is welded to the first metal portion;
A first terminal extension extending from the first terminal weld,
When the first current collecting terminal member is viewed in plan in the thickness direction of the electrode body, the first terminal extension portion extends in a direction from the other end side power generation arc portion to the one end side power generation arc shape portion, The first terminal welded portion is disposed on a first metal welded portion included in the adjacent metal portion of the first metal portion, and the first terminal welded portion and the first metal welded portion are arranged in the thickness direction of the electrode body. And a resistance welding step of resistance welding the first metal welded portion and the first terminal welded portion in a state where the first terminal extended portion and the first metal portion are separated from each other. Manufacturing method. A battery manufacturing method according to claim 1, comprising:
The first terminal extension of the first current collecting terminal member is:
An extended first portion that bends from the first terminal weld and extends away from the surface of the first metal portion;
A battery manufacturing method comprising: an extension second portion bent from the extension first portion and extending in a direction from the other end side power generation arc-shaped portion toward the one end side power generation arc-shaped portion. A method for producing a battery according to claim 1 or claim 2,
The resistance welding process includes:
At least a portion of the first metal portion excluding the first metal welded portion is pressed in the thickness direction of the electrode body, and the first metal welded portion and the first terminal welded portion are resistance welded. A method of manufacturing a battery in which the first terminal extension and the first metal part are separated from each other during the period. A method of manufacturing a battery according to claim 3,
The first metal part before welding to the first current collecting terminal member is
One end side metal arcuate part adjacent to the one end side power generation arcuate part and forming one end part of the first metal part;
The other end side metal arcuate part adjacent to the other end side power generation arcuate part and forming the other end part of the first metal part;
The flat adjacent metal part located between the one end side metal arcuate part and the other end side metal arcuate part,
The resistance welding process includes:
Disposing the first terminal welded portion of the first current collecting terminal member on the surface of the first metal welded portion positioned away from the one end side metal arcuate portion;
One end of the adjacent metal part, and at least a part of a flat one end sandwiched between the first metal welded part and the one end side metal arcuate part is pressed in the thickness direction of the electrode body, In the battery in which the first terminal extension portion of the first current collecting terminal member and the first metal portion are separated from each other during the resistance welding between the first metal weld portion and the first terminal weld portion. Production method. A method of manufacturing a battery according to claim 3,
The first metal part before welding to the first current collecting terminal member is
One end side metal arcuate part adjacent to the one end side power generation arcuate part and forming one end part of the first metal part;
The other end side metal arcuate part adjacent to the other end side power generation arcuate part and forming the other end part of the first metal part;
The flat adjacent metal part located between the one end side metal arcuate part and the other end side metal arcuate part,
The resistance welding process includes:
During the period in which at least a part of the one-end-side metal arc-shaped portion of the first metal portion is pressed in the thickness direction of the electrode body and the first metal weld portion and the first terminal weld portion are resistance-welded, The battery manufacturing method which makes the said 1st terminal extension part of a 1st current collection terminal member, and the said 1st metal part the state spaced apart. A method of manufacturing a battery according to claim 3,
The first metal part before welding to the first current collecting terminal member is
One end side metal arcuate part adjacent to the one end side power generation arcuate part and forming one end part of the first metal part;
The other end side metal arcuate part adjacent to the other end side power generation arcuate part and forming the other end part of the first metal part;
The flat adjacent metal part located between the one end side metal arcuate part and the other end side metal arcuate part,
The width dimension of the first terminal extension of the first current collecting terminal member is smaller than the width dimension of the first metal part,
The resistance welding process includes:
The first terminal extension of the first metal part when the first terminal weld part of the first current collecting terminal member is disposed on the surface of the first metal weld part of the first metal part. When the portion located adjacent to the first terminal extension in the width direction of the portion is the width direction adjacent portion,
During the period in which at least a part of the widthwise adjacent portion is pressed in the thickness direction of the electrode body and the first metal welded portion and the first terminal welded portion are resistance welded, the first current collecting terminal member A method for manufacturing a battery, wherein the first terminal extension and the first metal part are separated from each other. A method for producing a battery according to claim 1 or claim 2,
Prior to the resistance welding process,
One end side metal arcuate part adjacent to the one end side power generation arcuate part and forming one end part of the first metal part;
The other end side metal arcuate part adjacent to the other end side power generation arcuate part and forming the other end part of the first metal part,
An excision step of excising the one end side metal arcuate part of the first metal part, comprising the flat adjacent metal part positioned between the one end side metal arcuate part and the other end side metal arcuate part. Prepared,
The resistance welding process includes:
One end part of the adjacent metal part, the metal one end part forming one end part of the first metal part after cutting the one end side metal arcuate part as the first metal weld part, the first metal weld part And a method of manufacturing a battery for resistance welding the first terminal weld. An electrode body obtained by winding the first electrode plate, the second electrode plate, and the separator into a flat shape;
A first current collecting terminal member welded to the electrode body,
The electrode body is
A power generation unit in which the first electrode plate, the second electrode plate, and the separator overlap; and
A first metal part that is adjacent to the power generation part and that only the active material uncoated part of the first electrode plate overlaps;
The power generation part has a power generation flat part, one end side power generation arc-shaped part forming one end part of the power generation part, and the other end side power generation arc-shaped part forming the other end part of the power generation part,
The first current collecting terminal member is
A first terminal welding portion that forms the tip of the first current collecting terminal member, contacts the surface of the first metal portion, and is welded to the first metal portion;
A first terminal extension extending from the first terminal weld,
The first metal part is
Without having a part adjacent to the one end side power generation arc-shaped part,
An adjacent metal part including a metal end part adjacent to the power generation flat part and forming one end part of the first metal part;
The other end side metal arcuate part adjacent to the other end side power generation arcuate part and forming the other end part of the first metal part,
When the first current collecting terminal member is viewed in plan in the thickness direction of the electrode body, the first terminal extension portion extends in a direction from the other end side power generation arc portion to the one end side power generation arc shape portion, A battery in which the first terminal welding portion of the first current collecting terminal member is resistance-welded to the metal one end portion of the first metal portion.

Images