JP2015130317A - Nonaqueous electrolyte secondary battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery, capable of achieving a reduced thickness in a battery and furthermore capable of stably holding the position of an electrode body.SOLUTION: A nonaqueous electrolyte secondary battery 1 includes an electrode body 15 including a positive electrode and a negative electrode, and an outer packaging can 10 housing the electrode body 15. The outer packaging can 10 includes a first member 11 and a second member 12 which are disposed facing each other with the electrode body 15 interposed therebetween in the thickness direction of the electrode body 15 and joined to each other. The outer packaging can 10 includes an electrode body regulating region 10B having a section where a dimension in the thickness direction of the electrode body 15 is smaller than the thickness of the electrode body 15.

Description

  The present invention relates to a non-aqueous electrolyte secondary battery.

  Conventionally, the structure of the nonaqueous electrolyte secondary battery which accommodated the electrode body containing a positive electrode and a negative electrode in the armored can is known. In recent years, with the spread of thin portable devices, the demand for thin batteries has increased.

  In Japanese Patent No. 3885327, in a non-aqueous electrolyte secondary battery including an electrode element and a non-aqueous electrolyte in a battery can, the maximum opening of the battery can is sealed by a battery lid having a terminal. A non-aqueous electrolyte secondary battery is disclosed.

  In Japanese Patent No. 4191433, a battery case is formed on a half-shell body that is formed by processing a metal plate to provide a flange around the opening of the recess, and the electrode plate group is accommodated in the recess and the periphery is overlapped on the flange. There is disclosed a battery in which a metal lid plate and a flange disposed in such a manner are joined by seam welding.

Japanese Patent No. 3885327 Japanese Patent No. 4191433

  In the nonaqueous electrolyte secondary battery described in the above patent document, it is necessary to provide a space for connecting the electrode of the electrode body and the external terminal inside the outer can. Along with this, there is a possibility that the position of the electrode body is displaced inside the outer can.

  The objective of this invention is obtaining the structure of the nonaqueous electrolyte secondary battery which can make a battery thin and can hold | maintain the position of an electrode body stably.

  A nonaqueous electrolyte secondary battery according to an embodiment of the present invention includes an electrode body including a positive electrode and a negative electrode, and an outer can that houses the electrode body. The outer can includes a first member and a second member that are arranged to face each other with the electrode body interposed therebetween in the thickness direction of the electrode body, and are joined to each other. The outer can includes an electrode body regulating region having a portion in which the dimension in the thickness direction of the electrode body is smaller than the thickness of the electrode body.

  According to said structure, the armored can contains the electrode body control area | region which has a part whose dimension of a thickness direction is smaller than the thickness of an electrode body. That is, the position of the electrode body can be regulated by the electrode body regulation region.

  Further, the outer cans are arranged to face each other with the electrode body interposed therebetween in the thickness direction of the electrode body, and are joined to each other. In a thin battery, since the deep drawing process is not necessary compared to the case where the first member or the second member is opened in the height direction or the width direction, the processing becomes easy. Therefore, the battery can be made thinner.

  ADVANTAGE OF THE INVENTION According to this invention, the structure of the nonaqueous electrolyte secondary battery which can make a battery thin and can hold | maintain the position of an electrode body stably is obtained.

FIG. 1 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view schematically showing the internal configuration of the nonaqueous electrolyte secondary battery according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to one of the modifications of the first embodiment. FIG. 6 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to one of the modifications of the first embodiment. FIG. 7 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to one of the modifications of the first embodiment. FIG. 8 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to one of the modifications of the first embodiment. FIG. 9 is a perspective view illustrating a schematic configuration of a nonaqueous electrolyte secondary battery according to one of the modifications of the first embodiment. FIG. 10 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to one of the modifications of the first embodiment. FIG. 11 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to one of the modifications of the first embodiment. FIG. 12 is an exploded perspective view schematically showing the internal configuration of the nonaqueous electrolyte secondary battery according to one of the modifications of the first embodiment. FIG. 13 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to one of the modifications of the first embodiment. FIG. 14 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to one of the modifications of the first embodiment. FIG. 15 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to one of the modifications of the first embodiment. FIG. 16 is an exploded perspective view schematically showing the internal configuration of the nonaqueous electrolyte secondary battery according to one of the modifications of the first embodiment. FIG. 17 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to the second embodiment of the present invention. FIG. 18 is an exploded perspective view schematically showing the internal configuration of the nonaqueous electrolyte secondary battery according to Embodiment 2 of the present invention. 19 is a cross-sectional view taken along line XIX-XIX in FIG. FIG. 20 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to the third embodiment of the present invention. 21 is a cross-sectional view taken along line XXI-XXI in FIG. FIG. 22 is a cross-sectional view of the nonaqueous electrolyte secondary battery according to the first embodiment. FIG. 23 is a cross-sectional view of a nonaqueous electrolyte secondary battery according to a modification of the third embodiment. FIG. 24 is a cross-sectional view of a nonaqueous electrolyte secondary battery according to another modification of the third embodiment. FIG. 25 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to Embodiment 4 of the present invention. FIG. 26 is an exploded perspective view schematically showing the internal configuration of the nonaqueous electrolyte secondary battery according to Embodiment 4 of the present invention. 27 is a cross-sectional view taken along line XXVII-XXVII in FIG. FIG. 28 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery according to Embodiment 5 of the present invention. FIG. 29 is an exploded perspective view schematically showing the internal configuration of the nonaqueous electrolyte secondary battery according to Embodiment 5 of the present invention. 30 is a cross-sectional view taken along line XXX-XXX in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated. In addition, in order to make the explanation easy to understand, in the drawings referred to below, the configuration is shown in a simplified or schematic manner, or some components are omitted. Further, the dimensional ratio between the constituent members shown in each drawing does not necessarily indicate an actual dimensional ratio.

[First Embodiment]
FIG. 1 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery 1 according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view schematically showing the internal configuration of the nonaqueous electrolyte secondary battery 1. The nonaqueous electrolyte secondary battery 1 includes an outer can 10, a positive electrode terminal 13 (FIG. 1), a negative electrode terminal 14 (FIG. 1), an electrode body 15 (FIG. 2), an insulating member 16 (FIG. 1), and an electrolyte solution (not shown). It has.

  For convenience of explanation, the x direction, the y direction, and the z direction are determined along the outer shape of the outer can 10 as shown in FIG. Hereinafter, the x direction may be referred to as the width direction, the y direction as the thickness direction, and the z direction as the height direction. The nonaqueous electrolyte secondary battery 1 is a flat battery having a thickness dimension smaller than a width dimension or a height dimension.

  As shown in FIG. 2, the outer can 10 accommodates an electrode body 15 therein. The outer can 10 is composed of a box-shaped first member 11 opened to one side in the thickness direction and a plate-shaped second member 12. The first member 11 and the second member 12 are arranged to face each other with the electrode body 15 in between in the thickness direction of the electrode body 15. The second member 12 is disposed so as to cover the opening of the first member 11. The first member 11 and the second member 12 are joined by, for example, seam welding.

  The first member 11 and the second member 12 are made of, for example, aluminum or an aluminum alloy.

  More specifically, the first member 11 includes a substantially flat planar portion 111 and a peripheral wall portion 112 formed so as to surround the periphery of the planar portion 111. As shown in FIG. 1, the planar portion 111 further includes a planar portion 1111 and a planar portion 1112 that is disposed on the opening side of the planar portion 1111 and is formed in parallel with the planar portion 1111.

  The positive electrode terminal 13 and the negative electrode terminal 14 are disposed on the flat portion 1112. Although the detailed configuration will be described later, the positive terminal 13 is electrically connected to the outer can 10, and the negative terminal 14 is electrically insulated from the outer can 10.

  The electrode body 15 is formed by winding a belt-like positive electrode and a belt-like negative electrode with a separator in between and compressing in a thickness direction into a flat shape. A positive electrode lead tab 151 is connected to the positive electrode, and a negative electrode lead tab 152 is connected to the negative electrode.

  Although a positive electrode, a negative electrode, a separator, and electrolyte solution are not specifically limited, If it illustrates, it will be as follows.

  In the positive electrode, a positive electrode mixture layer is formed on one side or both sides of a belt-like positive electrode current collector. The positive electrode current collector is formed of, for example, a foil such as aluminum or titanium, a plain woven wire net, an expanded metal, a lath net, or a punching metal.

  The positive electrode mixture layer is formed by mixing a positive electrode active material, a conductive additive, and a binder. As the positive electrode active material, lithium manganate, lithium nickel composite oxide, lithium cobalt composite oxide, lithium nickel cobalt composite oxide, vanadium oxide, molybdenum oxide, or the like can be used. As the conductive assistant, graphite, carbon black, acetylene black, or the like can be used. As the binder, polyimide, polyamideimide, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), or the like can be used alone or in combination.

  The negative electrode is one in which a negative electrode mixture layer is formed on one side or both sides of a strip-shaped negative electrode current collector. The negative electrode current collector is formed of, for example, a foil such as copper, nickel, or stainless steel, a plain woven wire net, an expanded metal, a lath net, or a punching metal.

  The negative electrode mixture layer is formed by mixing a negative electrode active material and a binder. As the negative electrode active material, natural graphite, mesophase carbon, amorphous carbon, or the like can be used. As the binder, celluloses such as carboxymethyl cellulose (CMC) and hydroxypropyl cellulose (HPC), rubber binders such as styrene butadiene rubber (SBR) and acrylic rubber, PTFE, PVDF and the like can be used alone or in combination.

  The separator is formed of a porous film or a non-woven fabric such as polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), or polyphenyl sulfide (PPS).

The electrolytic solution is a solution in which a lithium salt is dissolved in an organic solvent. As an organic solvent, vinylene carbonate (VC), propylene carbonate (PC), ethylene carbonate (EC), butylene carbonate (BC), dimethyl carbonate (DMC), diethyl carbonate (DEC), methyl ethyl carbonate (MEC), or γ- Butyrolactone and the like can be used alone or in admixture of two or more. As the lithium salt, LiPF ₆ , LiBF ₄ , LiN (CF ₃ SO ₂ ) _2, or the like can be used.

  FIG. 3 is a cross-sectional view taken along line III-III in FIG. As shown in FIG. 3, the first member 11 has a through hole 1112 a and a through hole 1112 b.

  The positive electrode terminal 13 includes a first material layer 131 and a second material layer 132. The first material layer 131 further includes a flat surface portion 131A and a boss portion 131B. The positive electrode terminal 13 is fixed to the outer can 10 by press-fitting the boss portion 131B into the through hole 1112a and welding the peripheral edge of the flat portion 131A and the outer can 10 (first member 11).

  The positive electrode terminal 13 is, for example, a clad material in which a first material layer 131 and a second material layer 132 are pressed. In the positive electrode terminal 13, for example, the first material layer 131 is formed of aluminum or an aluminum alloy, and the second material layer 132 is formed of nickel or a nickel alloy.

  The positive electrode lead tab 151 is welded to the outer can 10. With this configuration, the positive electrode of the electrode body 15 (FIG. 2) and the positive electrode terminal 13 are electrically connected via the outer can 10.

  The negative electrode terminal 14 includes a flat surface portion 14A and a boss portion 14B. Around the negative electrode terminal 14, a gasket 141, an insulating plate 142, and a pressing plate 143 are disposed. As shown in FIG. 3, the boss portion 14B of the negative electrode terminal 14 is inserted into the through hole 1112b with the gasket 141 interposed therebetween. The negative electrode terminal 14 is fixed to the pressing plate 143 by inserting the tip of the boss portion 14B into the hole 143a formed in the pressing plate 143 and then caulking the tip of the boss portion 14B. An insulating plate 142 is disposed between the pressing plate 143 and the outer can 10 to insulate the pressing plate 143 from the outer can 10.

  The negative electrode terminal 14 is made of, for example, copper or copper plated with nickel. The pressing plate 143 is made of copper, for example. The gasket 141 and the insulating plate 142 are, for example, resin molded products.

  The negative electrode lead tab 152 is welded to the holding plate 143. With this configuration, the negative electrode of the electrode body 15 (FIG. 2) and the negative electrode terminal 14 are electrically connected via the pressing plate 143.

  4 is a cross-sectional view taken along line IV-IV in FIG. As shown in FIG. 4, the outer can 10 includes an electrode body housing area 10 </ b> A for housing the electrode body 15 and an electrode body regulating area 10 </ b> B. More specifically, the region in contact with the flat surface portion 1111 is the electrode body housing region 10A, and the region in contact with the flat surface portion 1112 is the electrode body regulating region 10B. In other words, the flat portion 1111 forms a part of the outer surface of the electrode body housing region 10A, and the flat portion 1112 forms a part of the outer surface of the electrode body regulating region 10B.

  As shown in FIG. 4, the dimension t <b> 1 in the thickness direction of the outer can 10 in the electrode body regulating region 10 </ b> B is smaller than the thickness te of the electrode body 15. More specifically, the dimension t1 is the distance between the inner surface of the first member 11 and the inner surface of the second member 12, that is, the inner dimension of the outer can 10.

  The sum t2 of the thickness of the outer can 10 where the negative electrode terminal 14 is arranged and the thickness of the portion where the negative electrode terminal 14 protrudes from the outer can 10 is equal to or less than the maximum thickness t3 of the outer can 10. Although illustration is omitted, the sum of the thickness of the outer can 10 where the positive terminal 13 is disposed and the sum of the thickness of the portion where the positive terminal 13 protrudes from the outer can 10 is also the maximum of the outer can 10. The thickness is not more than t3.

[Method for Manufacturing Nonaqueous Electrolyte Secondary Battery 1]
Hereinafter, an example of the manufacturing method of the nonaqueous electrolyte secondary battery 1 will be described.

  First, the electrode body 15 is prepared. Although the manufacturing method of the electrode body 15 is not specifically limited, If illustrated, it will be as follows.

  A positive electrode active material, a conductive additive, and a binder are sufficiently mixed in pure water or an organic solvent to prepare a dispersion. The dispersion is applied to one or both sides of the positive electrode current collector using a die coater, slit coater, dip coater or the like. After coating, the dispersion is dried and the thickness and density are adjusted by calendaring. Thereby, a positive electrode is obtained. The positive electrode lead tab 151 is attached to the positive electrode by welding or a conductive adhesive.

  The negative electrode active material and the binder are sufficiently mixed in pure water or an organic solvent to prepare a dispersion. The dispersion is applied to one side or both sides of the negative electrode current collector using a die coater, slit coater, dip coater or the like. After coating, the dispersion is dried and the thickness and density are adjusted by calendaring. Thereby, a negative electrode is obtained. The negative electrode lead tab 152 is attached to the negative electrode by welding or a conductive adhesive.

  The positive electrode, the negative electrode, and the separator are wound using a winding core having a circular, elliptical, or rhombic cross-sectional shape, and then the winding core is removed and pressure is applied in one direction to obtain a flat shape. Alternatively, the positive electrode, the negative electrode, and the separator may be wound using a winding core having a flat cross-sectional shape to form a flat wound body. Thereby, the electrode body 15 is obtained.

  Next, the first member 11, the second member 12, the negative electrode terminal 14, the gasket 141, the insulating plate 142, and the pressing plate 143 are prepared. The negative electrode terminal 14, the gasket 141, the insulating plate 142, and the pressing plate 143 are assembled to the first member 11.

  The electrode body 15 is disposed inside the peripheral wall portion 112 of the first member 11. The positive electrode lead tab 151 and the first member 11 are welded, and the negative electrode lead tab 152 and the pressing plate 143 are welded. The second member 12 is disposed so as to cover the opening of the first member 11, and the first member 11 and the second member 12 are seam welded.

  Next, an electrolytic solution is injected from the through hole 1112a. That is, the through hole 1112a serves as a pouring hole for the electrolyte while positioning the positive electrode terminal 13 by fitting with the boss 131B. The positive electrode terminal 13 also serves as a sealing plug for the liquid injection hole.

  While the through hole 1112a is open, preliminary charging is performed as necessary. Thereafter, the boss portion 131B of the positive electrode terminal 13 is press-fitted into the through hole 1112a, and the flat portion 131A and the first member 11 are welded. Thus, the positive terminal 13 is fixed to the outer can 10 and the through hole 1112a is sealed.

  Then, the nonaqueous electrolyte secondary battery 1 is manufactured by charging to a predetermined capacity.

[Effects of non-aqueous electrolyte secondary battery 1]
According to the present embodiment, the outer can 10 includes the electrode body regulating region 10 </ b> B having a portion whose dimension in the thickness direction is smaller than the thickness te of the electrode body 15. According to this configuration, the position of the electrode body 15 can be regulated by the electrode body regulation region 10B.

  Therefore, parts such as a spacer for fixing the electrode body 15 can be omitted. However, this embodiment does not exclude placing a spacer or the like inside the outer can 10. That is, the non-aqueous electrolyte secondary battery 1 may include components such as a spacer for fixing the electrode body 15.

  According to the present embodiment, the outer can 10 includes the first member 11 and the second member 12 that are arranged to face each other with the electrode body 15 interposed therebetween in the thickness direction of the electrode body 15 and are joined to each other. According to this configuration, it is easy to manufacture a large battery having a large dimension in the width direction and the height direction, or a thin battery having a small thickness with respect to the dimension in the width direction and the height direction. That is, compared with the case where the first member 11 or the second member 12 is opened in the height direction or the width direction, the deep drawing process is not necessary, so that the process becomes easy. Therefore, it is possible to manufacture a battery having a larger area than that of the conventional battery or a battery having a thinner thickness than that of the conventional battery.

  According to the present embodiment, the negative electrode terminal 14 is formed on the flat portion 1112 of the first member 11. In other words, the negative electrode terminal 14 is disposed on the surface of the first member 11 opposite to the second member 12 side in the electrode body regulating region 10B. This is a case where the thickness of the nonaqueous electrolyte secondary battery 1 is thin by arranging the negative electrode terminal 14 on the surface of the first member 11 opposite to the second member 12 side, that is, the surface intersecting the thickness direction. However, the area of the negative electrode terminal 14 can be ensured. Moreover, the nonaqueous electrolyte secondary battery 1 can be made compact by forming the negative electrode terminal 14 in the electrode body regulating region 10B.

  According to the present embodiment, the sum t2 of the thickness of the outer can 10 where the negative electrode terminal 14 is disposed and the thickness of the portion where the negative electrode terminal 14 protrudes from the outer can 10 is the maximum thickness of the outer can 10. t3 or less. According to this configuration, the negative electrode terminal 14 does not protrude from the outer surface of the electrode body housing region 10 </ b> A of the outer can 10. Thereby, the nonaqueous electrolyte secondary battery 1 can be made more compact. Moreover, it can suppress that the armored can 10 and the negative electrode terminal 14 are short-circuited unexpectedly.

  An insulating member 16 is disposed around the negative terminal 14. According to this structure, it can suppress that the armored can 10 and the negative electrode terminal 14 are short-circuited unexpectedly.

  Similarly, the positive electrode terminal 13 is arranged on the surface of the first member 11 opposite to the second member 12 side, that is, on the surface intersecting the thickness direction, so that the nonaqueous electrolyte secondary battery 1 is thin. Even in this case, the area of the positive electrode terminal 13 can be secured. Moreover, the nonaqueous electrolyte secondary battery 1 can be made compact by forming the positive electrode terminal 13 in the electrode body regulating region 10B.

  According to the present embodiment, the through hole 1112a has a function of positioning the positive electrode terminal 13 by fitting with the boss portion 131B, and also has a function as a liquid injection hole for injecting an electrolytic solution. Yes. Moreover, the positive electrode terminal 13 also serves as a sealing plug for the liquid injection hole. According to this structure, compared with the case where the liquid injection hole provided in the other location of the outer can 10 is sealed with the sealing plug, the number of steps and the number of parts can be reduced.

[Modification of First Embodiment]
Hereinafter, modified examples of the nonaqueous electrolyte secondary battery 1 will be described with reference to FIGS.

  FIG. 5 is a perspective view showing a schematic configuration of a non-aqueous electrolyte secondary battery 1 </ b> A that is one of modifications of the non-aqueous electrolyte secondary battery 1. In the nonaqueous electrolyte secondary battery 1 </ b> A, the positive electrode terminal 13 is disposed on a surface (peripheral wall portion 112) perpendicular to the width direction of the first member 11. Also in the nonaqueous electrolyte secondary battery 1 </ b> A, the positive electrode terminal 13 also serves as a sealing plug for the electrolyte injection hole.

  Also in this modification, the first member 11 includes a flat surface portion 1111 and a flat surface portion 1112 disposed on the opening side of the flat surface portion 1111. Also according to this modification, the position of the electrode body 15 can be regulated. As in this modification, the terminal position may be changed according to the configuration of the device to which the battery is mounted.

  FIG. 6 is a perspective view showing a schematic configuration of a non-aqueous electrolyte secondary battery 1 </ b> B that is one modified example of the non-aqueous electrolyte secondary battery 1. In the nonaqueous electrolyte secondary battery 1 </ b> B, the positive electrode terminal 13 is disposed on a surface perpendicular to the height direction of the first member 11. Also in the nonaqueous electrolyte secondary battery 1B, the positive electrode terminal 13 also serves as a sealing plug for the electrolyte injection hole.

  The nonaqueous electrolyte secondary battery 1 </ b> B includes a flat portion 114 instead of the flat portion 111 of the nonaqueous electrolyte secondary battery 1. Similar to the plane portion 111, the plane portion 114 includes a plane portion 1141 and a plane portion 1142 disposed on the opening side of the plane portion 1141. In the nonaqueous electrolyte secondary battery 1 (FIG. 1), the flat portion 1112 is formed in the entire width direction of the first member 11, whereas in this modification, the flat portion 1142 is formed in the width direction of the first member 11. It is only partly formed. Also according to this modification, the position of the electrode body 15 can be regulated. Further, according to this modification, the inner volume of the outer can can be increased as compared with the nonaqueous electrolyte secondary battery 1. Therefore, for example, more electrolytic solution can be injected.

  FIG. 7 is a perspective view showing a schematic configuration of a non-aqueous electrolyte secondary battery 1 </ b> C that is one of the modifications of the non-aqueous electrolyte secondary battery 1. In the nonaqueous electrolyte secondary battery 1 </ b> C, a liquid injection hole 112 a is formed in a surface perpendicular to the height direction of the first member 11. The liquid injection hole 112a is sealed by a sealing plug 17 inserted into the liquid injection hole 112a.

  The nonaqueous electrolyte secondary battery 1 </ b> C includes a planar portion 115 instead of the planar portion 111 of the nonaqueous electrolyte secondary battery 1. Similar to the plane part 111, the plane part 115 includes a plane part 1151 and a plane part 1152 arranged on the opening side of the plane part 1151. In the present modification, the flat portion 1152 is formed in a part of the first member 11 in the width direction. More specifically, the flat portion 1152 is formed in the vicinity of both end portions in the width direction of the first member 11. Also according to this modification, the position of the electrode body 15 can be regulated. Further, according to this modification, the inner volume of the outer can can be increased as compared with the nonaqueous electrolyte secondary battery 1. Therefore, for example, more electrolytic solution can be injected.

  FIG. 8 is a perspective view showing a schematic configuration of a non-aqueous electrolyte secondary battery 1 </ b> D that is one of the modifications of the non-aqueous electrolyte secondary battery 1. In the nonaqueous electrolyte secondary battery 1 </ b> D, the positive electrode terminal 13 is disposed on a surface that is perpendicular to the height direction of the first member 11 and that is closer to the flat surface portion 1111. In the present modification, the through hole 1112 a that is an electrolyte injection hole is sealed by the sealing plug 17.

  Also in this modification, the first member 11 includes a flat surface portion 1111 and a flat surface portion 1112 disposed on the opening side of the flat surface portion 1111. Also according to this modification, the position of the electrode body 15 can be regulated. As in this modification, the terminal position may be changed according to the configuration of the device to which the battery is mounted.

  FIG. 9 is a perspective view showing a schematic configuration of a non-aqueous electrolyte secondary battery 1 </ b> E that is one of modifications of the non-aqueous electrolyte secondary battery 1. In the nonaqueous electrolyte secondary battery 1 </ b> E, the positive electrode terminal 13 is disposed on a surface that is perpendicular to the height direction of the first member 11 and that is closer to the flat portion 1112. Other configurations are the same as those of the nonaqueous electrolyte secondary battery 1D. Also according to this modification, the position of the electrode body 15 can be regulated. As in this modification, the terminal position may be changed according to the configuration of the device to which the battery is mounted.

  FIG. 10 is a perspective view showing a schematic configuration of a non-aqueous electrolyte secondary battery 1 </ b> F that is one of modifications of the non-aqueous electrolyte secondary battery 1. In the nonaqueous electrolyte secondary battery 1 </ b> F, a liquid injection hole 112 a is formed in a surface (peripheral wall portion 112) perpendicular to the height direction of the first member 11. The liquid injection hole 112a is sealed by a sealing plug 17 inserted into the liquid injection hole 112a. That is, in the case of the nonaqueous electrolyte secondary battery 1, the positive electrode terminal 13 also serves as a sealing plug for the electrolyte injection hole, whereas in the nonaqueous electrolyte secondary battery 1F, the electrolyte injection hole 112a. And the sealing plug 17 are provided independently. According to this modification, since the liquid injection hole 112a is provided perpendicular to the thickness direction, the electrolytic solution can easily penetrate into the electrode body 15.

  Like the nonaqueous electrolyte secondary batteries 1G to 1L described below, the first member 10 can take an arbitrary shape. Since the outer can used for the conventional non-aqueous electrolyte secondary battery is manufactured by deep drawing in the height direction, it is difficult to form into a shape whose width changes along the height direction. It was. On the other hand, according to this embodiment, it can process into various plane shapes comparatively easily. Thus, the shape of the outer can can be designed in accordance with the shape of the device on which the battery is mounted. For example, the outer can can be provided with a relief for avoiding interference with the protrusions of the device.

  FIG. 11 is a perspective view showing a schematic configuration of a non-aqueous electrolyte secondary battery 1G which is one of the modifications of the non-aqueous electrolyte secondary battery 1. FIG. 12 is an exploded perspective view schematically showing the internal configuration of the nonaqueous electrolyte secondary battery 1G. The nonaqueous electrolyte secondary battery 1 </ b> G includes an outer can 10 </ b> G instead of the outer can 10. The outer can 10G is also composed of a box-shaped first member 11G that opens to one side in the thickness direction, and a flat plate-like second member 12G that seals the opening of the first member 11G.

  The outer can 10G has a substantially hexagonal shape in plan view. More specifically, the outer can 10G has a portion having a substantially constant width and a portion having a width that narrows in the height direction near the lower end in the height direction.

  The first member 11G includes a substantially flat planar portion 11G1 and a peripheral wall portion 11G2 formed to surround the periphery of the planar portion 11G1. The flat surface portion 11G1 further includes a flat surface portion 11G11 and a flat surface portion 11G12 that is disposed on the opening side of the flat surface portion 11G11 and formed in parallel with the flat surface portion 11G11. In this modification, the area in contact with the flat portion 11G11 is an electrode body accommodation area, and the area in contact with the flat portion 11G12 is an electrode body regulating area. Also by this modification, the position of the electrode body 15 can be regulated.

  According to this modification, the electrode body 15 can be moved away from the welded portion between the first member 11G and the second member 12G. Therefore, the influence of the heat which the electrode body 15 receives at the time of welding can be reduced. Moreover, more electrolyte solution can be injected.

  FIG. 13 is a perspective view showing a schematic configuration of a non-aqueous electrolyte secondary battery 1J which is one of modifications of the non-aqueous electrolyte secondary battery 1. The nonaqueous electrolyte secondary battery 1 </ b> J includes an outer can 10 </ b> J instead of the outer can 10. The outer can 10J is also composed of a box-shaped first member 11J that opens to one side in the thickness direction and a flat plate-like second member 12J that seals the opening of the first member 11J.

  The outer can 10J has a substantially hexagonal shape in plan view. More specifically, the outer can 10J has a shape in which one of four corners of a quadrangle is cut out in plan view.

  The first member 11J includes a substantially flat planar portion 11J1 and a peripheral wall portion 11J2 formed so as to surround the periphery of the planar portion 11J1. The flat surface portion 11J1 further includes a flat surface portion 11J11 and a flat surface portion 11J12 that is disposed on the second member 12J side with respect to the flat surface portion 11J11 and formed in parallel with the flat surface portion 11J11. As shown in FIG. 13, the width of the plane portion 11J12 is narrower than the width of the plane portion 11J11. In this modification, the area in contact with the flat portion 11J11 is an electrode body accommodation area, and the area in contact with the flat portion 11J12 is an electrode body regulating area. Also by this modification, the position of the electrode body 15 can be regulated.

  FIG. 14 is a perspective view showing a schematic configuration of a non-aqueous electrolyte secondary battery 1 </ b> K that is one of the modifications of the non-aqueous electrolyte secondary battery 1. The nonaqueous electrolyte secondary battery 1 </ b> K includes an outer can 10 </ b> K instead of the outer can 10. The outer can 10K is also composed of a box-shaped first member 11K opened in one side in the thickness direction and a flat plate-like second member 12K that seals the opening of the first member 11K.

  The outer can 10K has a substantially pentagonal shape in plan view. More specifically, the outer can 11K has a shape in which one of the four corners of a quadrangle is cut obliquely in plan view.

  The first member 11K includes a substantially flat planar portion 11K1 and a peripheral wall portion 11K2 formed so as to surround the periphery of the planar portion 11K1. The flat surface portion 11K1 further includes a flat surface portion 11K11 and a flat surface portion 11K12 that is disposed on the second member 12K side of the flat surface portion 11K11 and is formed in parallel with the flat surface portion 11K11. As shown in FIG. 14, the width of the flat portion 11K11 is substantially constant, whereas the width of the flat portion 11K12 changes along the height direction. In this modification, the area in contact with the flat portion 11K11 is an electrode body accommodation area, and the area in contact with the flat portion 11K12 is an electrode body regulating area. Also by this modification, the position of the electrode body 15 can be regulated.

  FIG. 15 is a perspective view showing a schematic configuration of a non-aqueous electrolyte secondary battery 1 </ b> L which is one modified example of the non-aqueous electrolyte secondary battery 1. FIG. 16 is an exploded perspective view schematically showing the internal configuration of the nonaqueous electrolyte secondary battery 1L. The nonaqueous electrolyte secondary battery 1L includes an outer can 10L instead of the outer can 10. The outer can 10L is also composed of a box-shaped first member 11L opened in one of the thickness directions and a flat plate-like second member 12L that seals the opening of the first member 11L.

  The outer can 10L has a substantially hexagonal shape in plan view. More specifically, the outer can 10L has a shape in which one of four corners of a quadrangle is cut out in plan view.

  The first member 11L includes a substantially flat plane portion 11L1 and a peripheral wall portion 11L2 formed to surround the periphery of the plane portion 11L1. In the nonaqueous electrolyte secondary battery 1L, the positive electrode terminal 13 is disposed on a surface (peripheral wall portion 11L2) perpendicular to the height direction of the first member 11L. The positive terminal 13 of the nonaqueous electrolyte secondary battery 1L also serves as a sealing plug for the electrolyte injection hole, as in the case of the nonaqueous electrolyte secondary battery 1.

  The flat surface portion 11L1 further includes a flat surface portion 11L11 and a flat surface portion 11L12 that is disposed on the second member 12L side of the flat surface portion 11L11 and formed in parallel with the flat surface portion 11L11. In this modification, the area in contact with the flat portion 11L11 is an electrode body accommodation area, and the area in contact with the flat portion 11L12 is an electrode body regulating area. Also by this modification, the position of the electrode body 15 can be regulated.

  As shown in FIG. 16, the nonaqueous electrolyte secondary battery 1 </ b> L includes an electrode body 15 </ b> L instead of the electrode body 15. Similarly to the electrode body 15, the electrode body 15 </ b> L includes a positive electrode, a negative electrode, a separator, and a negative electrode lead tab 152. On the other hand, the electrode body 15L does not include a positive electrode lead tab. In the nonaqueous electrolyte secondary battery 1L, the positive electrode of the electrode body 15L and the outer can 10L are directly conducted. That is, in the electrode body 15, the separator is disposed on the outermost periphery, whereas in the electrode body 15L, the positive electrode is disposed on the outermost periphery.

  According to this modification, the step of welding the positive electrode lead tab can be omitted. Therefore, the manufacturing process can be simplified.

[Second Embodiment]
FIG. 17 is a perspective view showing a schematic configuration of the nonaqueous electrolyte secondary battery 2 according to the second embodiment of the present invention. FIG. 18 is an exploded perspective view schematically showing the internal configuration of the nonaqueous electrolyte secondary battery 2. The non-aqueous electrolyte secondary battery 2 is different from the non-aqueous electrolyte secondary battery 1 in the configuration of the outer can. The nonaqueous electrolyte secondary battery 2 includes an outer can 20 instead of the outer can 10 of the nonaqueous electrolyte secondary battery 1. The nonaqueous electrolyte secondary battery 2 further includes an internal insulating member 28. The internal insulating member 28 prevents the negative electrode lead tab 152 and the second member 22 from being short-circuited inside the outer can 20.

  As with the outer can 10, the outer can 20 includes a box-shaped first member 21 that opens to one side in the thickness direction, and a flat plate-like second member 22 that seals the opening of the first member 21. Yes. The first member 21 and the second member 22 are joined by, for example, seam welding.

  More specifically, the first member 21 includes a substantially flat plane portion 211 and a peripheral wall portion 212 formed so as to surround the periphery of the plane portion 211. As shown in FIG. 17, the flat surface portion 211 further includes a flat surface portion 2111 and a flat surface portion 2112 that is inclined toward the second member 22 side.

  19 is a cross-sectional view taken along line XIX-XIX in FIG. As shown in FIG. 19, the outer can 20 includes an electrode body housing area 20 </ b> A for housing the electrode body 15 and an electrode body regulating area 20 </ b> B. More specifically, the region in contact with the flat portion 2111 is the electrode body housing region 20A, and the region in contact with the flat portion 2112 is the electrode body regulating region 20B. In other words, the flat part 2111 forms a part of the outer surface of the electrode body housing area 20A, and the flat part 2112 forms a part of the outer surface of the electrode body regulating area 20B.

  As shown in FIG. 19, the electrode body regulating region 20 </ b> B has a portion where the dimension in the thickness direction of the first member 21 is smaller than the thickness te of the electrode body 15. Also with the configuration of the present embodiment, the position of the electrode body 15 can be regulated by the electrode body regulation region 20B.

  Also in this embodiment, the sum t4 of the thickness of the outer can 20 where the negative electrode terminal 14 is arranged and the thickness of the portion where the negative electrode terminal 14 protrudes from the outer can 20 is the maximum thickness t5 of the outer can 20. It is as follows. According to this configuration, the negative electrode terminal 14 does not protrude from the outer surface of the electrode body housing region 20 </ b> A of the outer can 20. Thereby, the nonaqueous electrolyte secondary battery 2 can be made more compact. Moreover, it can suppress that the armored can 20 and the negative electrode terminal 14 are short-circuited unexpectedly.

  Although illustration is omitted, the maximum thickness of the outer can 20 is similarly the sum of the thickness of the outer can 20 where the positive terminal 13 is disposed and the thickness of the portion where the positive terminal 13 protrudes from the outer can 20. t5 or less. Thereby, the nonaqueous electrolyte secondary battery 2 can be made compact.

[Third Embodiment]
FIG. 20 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery 3 according to the third embodiment of the present invention. The nonaqueous electrolyte secondary battery 3 is different from the nonaqueous electrolyte secondary battery 1 in the configuration of the outer can. The nonaqueous electrolyte secondary battery 3 includes an outer can 30 instead of the outer can 10 of the nonaqueous electrolyte secondary battery 1.

  As with the outer can 10, the outer can 30 includes a box-shaped first member 31 that opens to one side in the thickness direction, and a flat plate-like second member 32 that seals the opening of the first member 31. Yes. The first member 31 and the second member 32 are joined by, for example, seam welding.

  More specifically, the first member 31 includes a substantially flat planar portion 311 and a peripheral wall portion 312 formed so as to surround the planar portion 311. The flat surface portion 311 further includes a flat surface portion 3111 and a flat surface portion 3112 which is disposed on the opening side of the flat surface portion 3111 and formed in parallel with the flat surface portion 3111. With this configuration, the outer can 30 includes an electrode body housing area and an electrode body regulating area, similarly to the outer can 10 in the first embodiment. Therefore, the position of the electrode body 15 can also be regulated by this embodiment.

  21 is a cross-sectional view taken along line XXI-XXI in FIG. As shown in FIG. 21, the first member 31 has a width dimension that increases toward the second member 32.

  FIG. 22 is a cross-sectional view of the nonaqueous electrolyte secondary battery 1 shown for comparison. As is apparent from a comparison between FIG. 21 and FIG. 22, according to the configuration of the present embodiment, the welding portion W between the first member 31 and the second member 32 can be moved away from the electrode body 15. Thereby, the influence of the heat at the time of welding to the electrode body 15 can be reduced.

  In addition, the 1st member 31 is not only the dimension of the width direction but the dimension of the height direction is large toward the opening side. As a result, all of the end sides of the second member 32, which are welded portions, can be moved away from the electrode body 15. Therefore, the influence of heat at the time of welding to the electrode body 15 can be further reduced.

  If the first member 31 is formed so that at least one of the end sides on the second member 32 side is away from the electrode body 15, an advantageous effect can be obtained as compared with the non-aqueous electrolyte secondary battery 1. For example, in FIG. 21, the circumferential wall portions 312 on both sides in the width direction of the first member 31 are inclined outward in the width direction, but only the circumferential wall portion 312 on one side in the width direction of the first member 31 is in the width direction. You may incline toward the outer side.

  Further, as shown in FIGS. 23 and 24, the peripheral wall portion 312 may be curved.

[Fourth Embodiment]
FIG. 25 is a perspective view showing a schematic configuration of the nonaqueous electrolyte secondary battery 4 according to the fourth embodiment of the present invention. FIG. 26 is an exploded perspective view schematically showing the internal configuration of the nonaqueous electrolyte secondary battery 4. The nonaqueous electrolyte secondary battery 4 includes an outer can 40 instead of the outer can 10 of the nonaqueous electrolyte secondary battery 1.

  Similar to the outer can 10, the outer can 40 includes a first member 41 and a second member 42 that are arranged to face each other with the electrode body 15 interposed therebetween in the thickness direction of the electrode body 15. Also in this embodiment, the 1st member 41 and the 2nd member 42 are joined, for example by seam welding.

  On the other hand, in the outer can 40, the 2nd member 42 is the box-shaped shape opened to one side of the thickness direction, and the 1st member 41 is a substantially flat plate shape. That is, the second member 42 includes a substantially flat planar portion 421 and a peripheral wall portion 422 formed surrounding the planar portion 421. The first member 41 includes a flat surface portion 4111 and a flat surface portion 4112 that is disposed on the second member 42 side of the flat surface portion 4111 and formed in parallel with the flat surface portion 4111.

  27 is a cross-sectional view taken along line XXVII-XXVII in FIG. As shown in FIG. 27, the outer can 40 includes an electrode body housing area 40 </ b> A for housing the electrode body 15 and an electrode body regulating area 40 </ b> B, similarly to the outer can 10. More specifically, the region in contact with the flat portion 4111 is the electrode body housing region 40A, and the region in contact with the flat portion 4112 is the electrode body regulating region 40B. In other words, the flat surface portion 4111 forms a part of the outer surface of the electrode body housing region 40A, and the flat surface portion 4112 forms a portion of the outer surface of the electrode body regulating region 40B.

  Also in the present embodiment, the dimension t6 in the thickness direction of the outer can 40 in the electrode body regulating region 40B is smaller than the thickness te of the electrode body 15. The dimension t6 is more specifically the distance between the inner surface of the first member 41 and the inner surface of the second member 42, that is, the inner dimension of the outer can 40.

  Also in this embodiment, the position of the electrode body 15 can be regulated by the electrode body regulation region 40B.

[Fifth Embodiment]
FIG. 28 is a perspective view showing a schematic configuration of a nonaqueous electrolyte secondary battery 5 according to the fifth embodiment of the present invention. FIG. 29 is an exploded perspective view schematically showing the internal configuration of the nonaqueous electrolyte secondary battery 5. The nonaqueous electrolyte secondary battery 5 includes an outer can 50 in place of the outer can 10 of the nonaqueous electrolyte secondary battery 1.

  Similar to the outer can 10, the outer can 50 includes a first member 51 and a second member 52 that are arranged to face each other with the electrode body 15 interposed therebetween in the thickness direction of the electrode body 15. Also in this embodiment, the 1st member 51 and the 2nd member 52 are joined by seam welding, for example.

  On the other hand, in the outer can 50, both the 1st member 51 and the 2nd member 52 are the box-shaped shape opened to one side of the thickness direction. That is, the first member 51 includes a flat portion 511 and a peripheral wall portion 512 formed so as to surround the flat portion 511. The second member 52 includes a substantially flat planar portion 521 and a peripheral wall portion 522 formed to surround the planar portion 521. In the present embodiment, the joint portion between the peripheral wall portion 512 of the first member 51 and the peripheral wall portion 522 of the second member 52 is a substantially central portion in the thickness direction of the outer can 50.

  The flat surface portion 511 includes a flat surface portion 5111 and a flat surface portion 5112 that is disposed on the second member 52 side of the flat surface portion 5111 and formed in parallel with the flat surface portion 5111.

  30 is a cross-sectional view taken along line XXX-XXX in FIG. As shown in FIG. 30, the outer can 50 includes an electrode body housing region 50 </ b> A for housing the electrode body 15 and an electrode body regulating region 50 </ b> B, like the outer can 10. More specifically, the region in contact with the flat portion 5111 is the electrode body housing region 50A, and the region in contact with the flat portion 5112 is the electrode body regulating region 50B. In other words, the flat portion 5111 forms a part of the outer surface of the electrode body housing region 50A, and the flat portion 5112 forms a portion of the outer surface of the electrode body regulating region 50B.

  Also in the present embodiment, the dimension t7 in the thickness direction of the outer can 50 in the electrode body regulating region 50B is smaller than the thickness te of the electrode body 15. More specifically, the dimension t7 is the distance between the inner surface of the first member 51 and the inner surface of the second member 52, that is, the inner dimension of the outer can 50.

  Also in the present embodiment, the position of the electrode body 15 can be restricted by the electrode body restriction region 50B.

[Other Embodiments]
As mentioned above, although embodiment about this invention was described, this invention is not limited only to the above-mentioned embodiment and its modification, A various change is possible within the scope of the invention. Moreover, each embodiment and its modification can be implemented in combination as appropriate.

  In the above-mentioned embodiment and its modification, the case where the electrode body accommodated in an exterior can was the electrode winding body which wound the strip | belt-shaped positive electrode and the negative electrode on both sides of the separator was demonstrated. However, the electrode body of the present embodiment is not limited to the electrode winding body, and may be, for example, an electrode stack in which strip-shaped positive electrodes and negative electrodes are stacked with a separator interposed therebetween.

  In the above-mentioned embodiment and its modification, the case where the polarity of the armored can was a positive electrode was demonstrated. However, the polarity of the outer can may be a negative electrode. Alternatively, the outer can may be insulated from both the positive electrode and the negative electrode. When the outer can is electrically connected to one of the positive electrode and the negative electrode, the external terminal having the same polarity as the polarity of the outer can may not be formed.

  As illustrated by the above-described embodiment and its modification, a nonaqueous electrolyte secondary battery according to an embodiment of the present invention includes an electrode body including a positive electrode and a negative electrode, and an outer can that houses the electrode body. Prepare. The outer can includes a first member and a second member that are arranged to face each other with the electrode body interposed therebetween in the thickness direction of the electrode body, and are joined to each other. The outer can includes an electrode body regulating region having a portion in which the dimension in the thickness direction of the electrode body is smaller than the thickness of the electrode body.

  According to said structure, the position of an electrode body can be controlled with an electrode body control area | region. Further, in a thin battery, the deep drawing process is not necessary as compared with the case where the first member or the second member is opened in the height direction or the width direction, so that the processing becomes easy. Therefore, the battery can be made thinner.

  Preferably, it further includes a first terminal that is electrically connected to one of the positive electrode and the negative electrode and is disposed on the surface of the first member on the opposite side to the second member in the electrode body regulating region. According to this configuration, even when the nonaqueous electrolyte secondary battery is thin, the area of the first terminal can be ensured. In addition, the non-aqueous electrolyte secondary battery can be made compact by forming the first terminal in the electrode body regulating region.

  The polarity of the first terminal may be opposite to that of the outer can.

  Preferably, the sum of the thickness of the outer can at the portion where the first terminal is disposed and the thickness of the portion protruding from the outer can of the first terminal is equal to or less than the maximum thickness of the outer can. According to this configuration, the first terminal does not protrude from the portion having the maximum thickness of the outer can. Therefore, the battery can be made more compact. Moreover, it can suppress that a 1st terminal and an exterior can short-circuit suddenly.

  Preferably, an insulating member disposed around the first terminal is further provided. According to this configuration, it is possible to prevent the outer can and the first terminal from being short-circuited unexpectedly.

  You may further provide the 2nd terminal electrically connected with the other of a positive electrode and a negative electrode, and arrange | positioned in the surface on the opposite side to the 2nd member side of a 1st member in an electrode body control area | region. According to this configuration, the area of the second terminal can be ensured even when the nonaqueous electrolyte secondary battery is thin. Further, the non-aqueous electrolyte secondary battery can be made compact by forming the second terminal in the electrode body regulating region.

  Preferably, a liquid injection hole is formed in the surface opposite to the second member side of the first member in the electrode body regulating region, and the second terminal is disposed in a portion overlapping the liquid injection hole. According to this configuration, the second terminal also functions as a sealing plug for the liquid injection hole. Therefore, a process and the number of parts can be reduced compared with the case where the injection hole provided in the other location of the exterior can is sealed with a sealing plug.

  The first member includes a first planar portion and a second planar portion that is disposed closer to the second member than the first planar portion and is parallel to the first planar portion. The second planar portion is an electrode body regulating region. It is good also as a structure which is a part of outer surface.

  The first member includes a first plane part and a second plane part that is continuous with the first plane part and is inclined toward the second member side. The second plane part is an outer surface of the electrode body regulating region. It is good also as a structure which is a part.

  Preferably, the dimension of the first member increases in the direction perpendicular to the thickness direction toward the second member side. According to this structure, the welding part of a 1st member and a 2nd member can be kept away from an electrode body. Thereby, the influence of heat at the time of welding to the electrode body can be reduced.

  The nonaqueous electrolyte secondary battery may have a configuration in which the first member has a box shape opened to the second member side. Alternatively, the nonaqueous electrolyte secondary battery may have a box-like shape in which the second member is opened to the first member side. Alternatively, both the first member and the second member may have a box shape.

  1,1A to 1L, 2,3,4,5 Non-aqueous electrolyte secondary battery 10, 20, 30, 40, 50 outer can, 10A, 40A, 50A electrode body housing portion, 10B, 40B, 50B electrode body regulation 11, 1st member, 12 2nd member, 13 positive electrode terminal, 14 negative electrode terminal, 15 electrode winding body, 16 insulating member, 17 sealing plug

Claims (12)

An electrode body including a positive electrode and a negative electrode;
An outer can including a first member and a second member that are arranged opposite to each other with the electrode body interposed therebetween in the thickness direction of the electrode body and are joined to each other to receive the electrode body;
The outer can is a non-aqueous electrolyte secondary battery including an electrode body regulating region having a portion in which the dimension in the thickness direction of the electrode body is smaller than the thickness of the electrode body.   The first terminal that is electrically connected to one of the positive electrode and the negative electrode and is disposed on a surface opposite to the second member side of the first member in the electrode body regulating region. 2. The nonaqueous electrolyte secondary battery according to 1.   The nonaqueous electrolyte secondary battery according to claim 2, wherein the polarity of the first terminal is opposite to the polarity of the outer can.   The sum of the thickness of the outer can at the portion where the first terminal is disposed and the thickness of the portion protruding from the outer can of the first terminal is equal to or less than the maximum thickness of the outer can. The nonaqueous electrolyte secondary battery according to 2 or 3.   The nonaqueous electrolyte secondary battery according to any one of claims 2 to 4, further comprising an insulating member disposed around the first terminal.   The second terminal that is electrically connected to the other of the positive electrode and the negative electrode and is disposed on a surface opposite to the second member side of the first member in the electrode body regulating region. The nonaqueous electrolyte secondary battery according to any one of 2 to 5.   The liquid injection hole is formed on the surface of the first member opposite to the second member side in the electrode body regulating region, and the second terminal is disposed in a portion overlapping the liquid injection hole. The nonaqueous electrolyte secondary battery as described. The first member is
A first plane portion;
A second plane part that is disposed closer to the second member than the first plane part and is parallel to the first plane part;
The non-aqueous electrolyte secondary battery according to any one of claims 1 to 7, wherein the second flat portion is a part of an outer surface of the electrode body regulating region. The first member is
A first plane portion;
A second plane portion that is continuous with the first plane portion and is inclined toward the second member side;
The non-aqueous electrolyte secondary battery according to any one of claims 1 to 7, wherein the second flat portion is a part of an outer surface of the electrode body regulating region.   The nonaqueous electrolyte secondary battery according to any one of claims 1 to 9, wherein the first member has a dimension that increases in a direction perpendicular to a thickness direction toward the second member.   The non-aqueous electrolyte secondary battery according to any one of claims 1 to 10, wherein the first member has a box-like shape opened to the second member side. The non-aqueous electrolyte secondary battery according to any one of claims 1 to 11, wherein the second member has a box shape opened to the first member side.

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