JP2015185254A - Nonaqueous electrolyte secondary battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery which enables the slimming down of a nonaqueous electrolyte secondary battery and is easy to connect an external device therewith and hard to disconnect an external connection terminal therefrom.SOLUTION: A nonaqueous electrolyte secondary battery 1A comprises: an electrode body 5; an outer can 2 housing the electrode body 5, having a polarity of a positive electrode, and including a first member 21 and a second member 22 which are opposed to each other in a thickness direction of the electrode body 5 with the electrode body 5 located therebetween and joined to each other; and a negative electrode terminal 4 electrically connecting with an electrode, of which the polarity is opposite to that of the outer can 2, in the electrode body 5. The first member 21 includes: a main body part 212; and a stepped part 213 disposed in contact with one end of the main body part 212 and having an outer surface located on the side of the second member 22 with respect to the outer surface of the main body part 212. The negative electrode terminal 4 includes: an external connection part 4a having a tabular shape and disposed on the outer surface of the stepped part 213; and a boss part 4b disposed on one surface of the external connection part 4a, and put in a hole 213c of the stepped part 213 and thus, fixed in the stepped part 213.

Description

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

  Conventionally, as for non-aqueous electrolyte secondary batteries, for example, those disclosed in Patent Documents 1 to 4 exist.

  Japanese Patent No. 4191433 (Patent Document 1) discloses a battery in which an electrode plate group is accommodated in a half-shell battery case and an open portion of the battery case is sealed with a cover plate. In this battery, a stepped portion having a reduced depth is formed at the end of the recessed portion of the battery case, and the shaft portion of the rivet is inserted into the terminal hole provided in the stepped portion from the inside of the battery case, and the tip of the shaft portion is caulked. A rivet is fixed to the stepped portion with the insulating gasket interposed between the portion and the outer surface of the stepped portion to form a positive external terminal.

  Japanese Patent No. 4900751 (Patent Document 2) discloses a battery including a battery can including a can body having a recess and a metal plate that seals an opening end of the recess of the can body. A negative electrode terminal and a positive electrode terminal are provided on an upper wall portion that is a peripheral surface portion of the can body.

  In Japanese Patent No. 4254998 (Patent Document 3), a rectangular frame-shaped metal frame having both end faces in the thickness direction opened, an upper metal lid and a lower metal lid that close both openings of the metal frame, A battery having a battery can made of is disclosed. A terminal for supplying power to a cellular phone or the like is provided at the upper front end of the upper metal lid.

  Japanese Patent No. 4148458 (Patent Document 4) discloses a battery provided with a battery can comprising a can body having a recess and a metal plate that seals the open end of the recess of the can body. The flange portion of the can body is provided with a take-out port composed of two rectangular punching holes, and the positive and negative lead bodies extending from the take-out port to the outside of the battery can serve as external connection terminals. .

Japanese Patent No. 4191433 Japanese Patent No. 4900751 Japanese Patent No. 4254998 Japanese Patent No. 4148458

  In the battery of Patent Document 1, a caulking portion formed from a tip portion of a shaft portion of a rivet is fixed to an outer surface of a step portion, and the caulking portion of the rivet functions as an external terminal. However, since the caulking portion for fixing the rivet appears on the outer surface of the stepped portion, an impact from the outside of the battery is easily transmitted to the caulking portion, and the caulking portion may be damaged. If the caulking portion is damaged, there is a problem that the external connection terminal (rivet) is detached from the battery case.

  In addition, the caulking portion is formed by pressurizing and deforming the tip of the shaft portion of the rivet protruding to the outside of the battery case, so that the outer surface of the caulking portion has a distorted shape, and is a contact for connecting other external devices. The area naturally becomes smaller. For this reason, there is also a problem that it is difficult to connect another external device to the caulking portion.

  On the other hand, in the battery of Patent Document 2, since the negative electrode terminal and the positive electrode terminal are provided on the upper wall portion serving as the peripheral surface portion of the can body, the width dimension for arranging the negative electrode terminal and the positive electrode terminal in the can body. As a result, it is difficult to reduce the thickness of the battery can.

  Further, in the battery of Patent Document 3, a power supply terminal is provided at the upper front end of the upper metal lid that constitutes the battery can, but the terminal portion disposed inside the battery extends from the through hole of the upper metal lid. It is a composition that appears. For this reason, the contact area of the outer surface of the power supply terminal is naturally reduced, and it is difficult to connect an external device to the outer surface of the power supply terminal.

  Furthermore, since the battery of patent document 4 has taken out each lead body connected to the electrode body as it is from the take-out port of the can body, it is difficult to connect an external device to this lead body.

  An object of the present invention is to provide a non-aqueous electrolyte secondary battery that can be reduced in thickness, can be easily connected to an external device, and the external connection terminal is not easily detached.

  A nonaqueous electrolyte secondary battery according to an embodiment of the present invention has an electrode body including a positive electrode and a negative electrode, and a polarity of either a positive electrode or a negative electrode, and sandwiches the electrode body in the thickness direction of the electrode body An outer can including a first member and a second member that are disposed opposite to each other and accommodate the electrode body, and an external connection terminal that is electrically connected to an electrode having a polarity opposite to the polarity of the outer can in the electrode body, Is provided. The first member is disposed in contact with a first main body having a first thickness and one end of the first main body, and is located on the first member side with respect to the outer surface of the first main body. And a second body portion including at least a portion having a surface and a second thickness that is thinner than the first thickness. The external connection terminal has a flat plate shape, and is disposed on the outer surface of the second main body portion, on one surface of the external connection portion, and in the insertion hole of the second main body portion. And a boss portion that is inserted and fixed inside the second main body portion.

  According to this embodiment, since the first member and the second member are arranged to face each other with the electrode body sandwiched in the thickness direction of the electrode body, the opening of the first member or the second member is widened. Can do. As a result, even if the thickness of the outer can is reduced, the electrode body can be accommodated from the opening of the first member or the second member, and the battery can be made thinner. Moreover, since the external connection part is arrange | positioned on the outer surface of the 2nd main-body part, and has a flat plate shape, an external apparatus can be easily connected to an external connection terminal. Furthermore, since the boss part of the external connection terminal is fixed inside the second main body part, the joint part of the external connection terminal is not directly subjected to an impact from the outside of the battery, and the external connection terminal does not come off the outer can. Can be.

  In the nonaqueous electrolyte secondary battery according to one embodiment of the present invention, a press plate that is disposed inside the second main body portion, is electrically connected to an electrode of an electrode body having a polarity opposite to the polarity of the outer can, and includes a hole portion The boss is preferably inserted into the hole of the presser plate, and the tip of the boss is fixed to the presser plate.

  According to this embodiment, even if an external impact is received, the joint portion between the boss portion of the external connection terminal and the press plate is not directly affected, and the joint portion between the boss portion of the external connection terminal and the press plate. Can be protected inside the outer can. In addition, since the press plate is electrically connected to the electrode of the electrode body having a polarity opposite to the polarity of the outer can, and is fixed to the boss portion of the external connection terminal inside the second main body portion, via the press plate, The external connection terminal can be conducted to the electrode of the electrode body having a polarity opposite to the polarity of the outer can.

  In the nonaqueous electrolyte secondary battery according to one embodiment of the present invention, it is preferable to further include an insulator disposed between the external connection terminal and the holding plate and the second main body.

  According to this embodiment, the insulation between the outer can and the external connection terminal is ensured, and the airtightness inside the battery can be maintained.

  In the nonaqueous electrolyte secondary battery according to one embodiment of the present invention, the insulator is disposed between the outer surface of the second main body portion and the external connection portion, and faces the insertion hole of the second main body portion. It is preferable to include a first insulator disposed between the portion to be supported and the boss portion, and a second insulator disposed between the inner surface of the second main body portion and the presser plate.

  According to this embodiment, the first and second insulators are integrally interposed between the second main body portion, the external connection terminal, and the presser plate. For this reason, the electrical insulation of an exterior can, an external connection terminal, and a holding plate is ensured, and the airtightness inside a battery can be maintained.

  In the non-aqueous electrolyte secondary battery according to the embodiment of the present invention, the second main body includes a step having an outer surface that is recessed from the outer surface of the first main body, and the external connection includes the step. It is preferable to arrange | position on the outer surface of.

  According to this embodiment, since the external connection portion has a flat plate shape and is disposed on the outer surface of the step portion, an external device can be easily connected to the external connection portion. Furthermore, since the external connection portion is disposed on the outer surface of the step portion having an outer surface that is recessed from the outer surface of the first main body, the thickness of the portion where the external connection portion is disposed can be reduced.

  In the nonaqueous electrolyte secondary battery according to the embodiment of the present invention, the second main body portion has an inclined portion whose thickness is inclined from the first thickness toward the opposite side to the first main body portion. The external connection part is preferably disposed on the outer surface of the inclined part.

  According to this embodiment, since the external connection portion has a flat plate shape and is disposed on the outer surface of the inclined portion, an external device can be easily connected to the external connection portion. Furthermore, even when the terminal portion of the external device is formed in an inclined shape, the external connection portion can be more appropriately connected to the external device.

  In the nonaqueous electrolyte secondary battery according to one embodiment of the present invention, the first member preferably has a box shape opened to the second member side.

  According to this embodiment, the electrode body can be accommodated from the opening of the first member.

  In the nonaqueous electrolyte secondary battery according to an embodiment of the present invention, the second member preferably has a box shape opened to the first member side.

  According to this embodiment, the electrode body can be accommodated from the opening of the second member.

  In the nonaqueous electrolyte secondary battery according to the embodiment of the present invention, the first member has a box shape opened to the second member side, and the second member has a box shape opened to the first member side. It is preferable that

  According to this embodiment, the electrode body can be accommodated from the opening of the first member or the opening of the second member.

  ADVANTAGE OF THE INVENTION According to this invention, while aiming at thickness reduction, an external apparatus can be connected easily and the non-aqueous electrolyte secondary battery which an external connection terminal cannot easily come off can be provided.

1 is a perspective view of a nonaqueous electrolyte secondary battery 1A according to a first embodiment of the present invention. It is a disassembled perspective view of the nonaqueous electrolyte secondary battery 1A. It is a perspective view which shows partially the inside of nonaqueous electrolyte secondary battery 1A. It is a perspective view which shows a positive electrode terminal. It is VV sectional drawing which shows partially arrangement | positioning of the positive electrode terminal in FIG. It is a perspective view which shows a negative electrode terminal. It is a perspective view which shows a gasket. It is a perspective view which shows a lid | cover insulating plate. It is a perspective view which shows a pressing plate. It is a perspective view which shows an insulation seal. It is XI-XI sectional drawing which shows partially arrangement | positioning of the negative electrode terminal in FIG. It is XII-XII sectional drawing in FIG. It is a perspective view of the nonaqueous electrolyte secondary battery 1B by 2nd Embodiment. It is XIV-XIV sectional drawing which showed arrangement | positioning of the negative electrode terminal in FIG. It is a perspective view of 1 C of nonaqueous electrolyte secondary batteries by 3rd Embodiment. It is a perspective view of 1 C of nonaqueous electrolyte secondary batteries which show the modification of 3rd Embodiment. It is a perspective view of 1 C of nonaqueous electrolyte secondary batteries which show the modification of 3rd Embodiment. It is a perspective view of 1 C of nonaqueous electrolyte secondary batteries which show the modification of 3rd Embodiment. It is a perspective view of nonaqueous electrolyte secondary battery 1D by a 4th embodiment. It is a perspective view of the nonaqueous electrolyte secondary battery 1E by 5th Embodiment. It is a perspective view of the nonaqueous electrolyte secondary battery 1F by 6th Embodiment. It is a perspective view of the nonaqueous electrolyte secondary battery 1G by 7th Embodiment. It is a perspective view of the nonaqueous electrolyte secondary battery 1H by 8th Embodiment. It is a disassembled perspective view which shows typically the internal structure of the nonaqueous electrolyte secondary battery 1H. It is a perspective view of the nonaqueous electrolyte secondary battery 1I by 9th Embodiment. It is a perspective view of the nonaqueous electrolyte secondary battery 1J by 10th Embodiment. It is XXVII-XXVII sectional drawing of the nonaqueous electrolyte secondary battery 1J in FIG. It is XXVIII-XXVIII sectional drawing of the nonaqueous electrolyte secondary battery 1A in FIG. It is sectional drawing of the nonaqueous electrolyte secondary battery 1J which shows the modification of 10th Embodiment. It is sectional drawing of the nonaqueous electrolyte secondary battery 1J which shows the modification of 10th Embodiment. It is a perspective view of the nonaqueous electrolyte secondary battery 1K by 11th Embodiment. It is a disassembled perspective view of the nonaqueous electrolyte secondary battery 1K. It is a perspective view of 1 L of nonaqueous electrolyte secondary batteries by 12th Embodiment. It is a disassembled perspective view of 1 L of nonaqueous electrolyte secondary batteries.

[First Embodiment]
Hereinafter, a first embodiment 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.

  With reference to FIGS. 1-3, the whole structure of 1 A of nonaqueous electrolyte secondary batteries by 1st Embodiment is demonstrated. The nonaqueous electrolyte secondary battery 1 </ b> A includes an outer can 2, a positive electrode terminal 3, a negative electrode terminal 4, a gasket 41, a lid insulating plate 42, a holding plate 43, an insulating seal 44, and an electrode winding body 5. And an insulating seal 6.

  For convenience of explanation, the x direction, the y direction, and the z direction are determined along the outer shape of the outer can 2 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. Further, the dimension in the thickness direction of a part may be referred to as the “thickness” of the part. The nonaqueous electrolyte secondary battery 1 </ b> A is a flat battery having a thickness direction dimension smaller than a width direction or height direction dimension.

  The outer can 2 has one of a positive polarity and a negative polarity. In the first embodiment, the outer can 2 has a positive polarity.

  Further, as shown in FIGS. 1 and 2, the outer can 2 accommodates an electrode winding body 5 therein. The outer can 2 is composed of a box-shaped first member 21 opened to one side in the thickness direction and a plate-shaped second member 22. The first member 11 and the second member 22 are disposed to face each other with the electrode winding body 5 in between in the thickness direction of the electrode winding body 5. The first member 21 and the second member 22 are made of, for example, aluminum or an aluminum alloy.

  As shown in FIGS. 1 and 2, the first member 21 has an outer surface that is a flat plate having a substantially rectangular shape in plan view. As shown in FIG. 3, the first member 21 has a box-like shape opened to the second member 22 side. Moreover, the 1st member 21 has the opening part 211 located in the thickness direction one side, and is provided with the main-body part 212 and the level | step-difference part 213, as shown in FIG. 2 and FIG.

  As shown in FIG. 3, the opening 211 is formed as a part that is fully open on the opposite side of the outer surface of the first member 21. More specifically, the opening 211 is a portion surrounded by a peripheral wall portion extending in the y direction from the outer periphery of the outer surface of the first member 21. From the opening 211, the electrode winding body 5 and the like are accommodated in the first member 21, and the opening 211 is sealed by the second member 22.

  The main body 212 has a thickness t1. The step portion 213 is disposed in contact with one end of the main body portion 212 in the z direction. As shown in FIG. 2, the stepped portion 213 has an outer surface that is recessed toward the second member 22 relative to the outer surface of the main body portion 212 in the entire x direction.

  The stepped portion 213 has a thickness t2 that is thinner than the thickness t1 of the main body 212. Here, the difference between the thickness t1 and the thickness t2, that is, the distance between the outer surface of the main body 212 and the outer surface of the step 213 is preferably in the range of 0.5 to 1.0 mm.

  As shown in FIG. 2, the step portion 213 includes a liquid injection hole 213a, a recess 213b, and a hole 213c. The liquid injection hole 213 a has a circular shape that leads to the inside of the outer can 2. The liquid injection hole 213a is used when injecting an electrolyte into the outer can 2. The recess 213b is further recessed in the y direction than the outer surface of the stepped portion 213. The bottom of the recess 213b is a flat surface having a substantially rectangular shape. The hole 213 c is formed at the bottom of the recess 213 b and has a circular shape that communicates with the interior of the outer can 2.

  As shown in FIGS. 1 and 2, the positive electrode terminal 3 and the negative electrode terminal 4 function as external connection terminals, and are disposed in the step portion 213 of the first member 21. In the first embodiment, as shown in FIGS. 1 and 2, the positive terminal 3 is disposed on the left side of the step 213 and the negative terminal 4 is disposed on the right side of the step 213.

  As shown in FIG. 2, the positive electrode terminal 3 and the negative electrode terminal 4 are disposed on the step portion 213 from the outside of the first member 21. The positive electrode terminal 3 is electrically connected to the outer can 2 and disposed in the stepped portion 213. Further, as shown in FIG. 2, the negative electrode terminal 4 is disposed in the stepped portion 213 together with the gasket 41, the lid insulating plate 42, the holding plate 43, and the insulating seal 44, and is electrically insulated from the outer can 2. The The details of the positive electrode terminal 3, the negative electrode terminal 4, the gasket 41, the lid insulating plate 42, the holding plate 43, and the insulating seal 44 will be described later.

  The electrode winding body 5 is obtained by winding a belt-like positive electrode and a belt-like negative electrode with a separator in between and compressing it in the thickness direction into a flat shape. As shown in FIG. 2, the electrode winding body 5 includes a lead tab 5a connected to the positive electrode and a lead tab 5b connected to the negative electrode. As shown in FIGS. 2 and 3, the electrode winding body 5 is accommodated in the first member 21.

  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 is used. As the binder, a cellulose binder such as carboxymethyl cellulose (CMC) or hydroxypropyl cellulose (HPC), a rubber binder such as styrene butadiene rubber (SBR) or acrylic rubber, PTFE, PVDF, or the like may 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 the 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 or the like may be used alone or in combination of two or more. As the lithium salt, LiPF ₆ , LiBF ₄ , LiN (CF ₃ SO ₂ ) ₂ or the like is used.

  As shown in FIG. 2, the insulating seal 6 is attached to the inner surface of the second member 22 at a position facing the lead tabs 5a and 5b. With such a configuration, even if the lead tabs 5a and / or 5b are peeled off due to aging or external impact, the lead tabs 5a and / or 5b come into contact with the insulating seal 6 disposed on the inner surface of the second member 22. However, there is no possibility of directly touching the second member 22. For this reason, the short circuit with the positive electrode or negative electrode of the electrode winding body 5, and the armored can 2 can be prevented beforehand.

  The lead tab 5a is connected to the inner surface of the step portion 213 as shown in FIG. For this reason, the outer can 2 is electrically connected to the positive electrode of the electrode winding body 5. Further, the positive electrode terminal 3 is disposed on the outer surface of the stepped portion 213 while being electrically connected to the outer can 2. For this reason, the positive electrode terminal 3 is electrically connected to the positive electrode of the electrode winding body 5 through the outer can 2.

  Further, the lead tab 5b is connected to a presser plate 43 arranged inside the first member 21, as shown in FIG. The pressing plate 43 is formed of aluminum or an aluminum alloy, and is connected to the negative electrode terminal 4 inside the first member 21. That is, the holding plate 43 functions as a conductor for the negative electrode. For this reason, the negative electrode terminal 4 is electrically connected to the negative electrode of the electrode winding body 5. Thus, the negative electrode terminal 4 functions as an external connection terminal that conducts with an electrode having a polarity opposite to the polarity of the outer can 2 in the electrode winding body 5.

  Next, the configuration of the positive electrode terminal 3 will be described in detail.

  As shown in FIG. 4, the positive electrode terminal 3 includes a flat plate portion 3a having a flat plate shape, an external connection portion 3b, and a boss portion 3c. The external connection portion 3b has a flat plate shape and is formed on one surface of the flat plate portion 3a. The boss portion 3c has a cylindrical shape and is formed on the surface opposite to the surface on which the external connection portion 3b of the flat plate portion 3a is formed. The boss portion 3c is formed at a position biased to one side of the flat plate portion 3a in the in-plane direction of the flat plate portion 3a.

  The flat plate portion 3a and the boss portion 3c are made of, for example, aluminum or an aluminum alloy. The external connection portion 3b is formed of, for example, nickel or copper plated with nickel.

  As shown in FIG. 5, the positive electrode terminal 3 is disposed in the step portion 213 so that the boss portion 3 c is press-fitted into the liquid injection hole 213 a and the flat plate portion 3 a is in contact with the outer surface of the step portion 213. As a result, the external connection portion 3b is exposed to the outside.

  Further, as shown in FIG. 5, the liquid injection hole 213 a is sealed by the boss portion 3 c of the positive electrode terminal 3. For this reason, the positive electrode terminal 3 has a function as a sealing stopper with respect to the liquid injection hole 213a.

  Next, the configuration of the negative electrode terminal 4, the gasket 41, the lid insulating plate 42, the holding plate 43, and the insulating seal 44 will be described in detail.

  As shown in FIG. 6, the negative electrode terminal 4 includes an external connection portion 4a and a boss portion 4b. The external connection portion 4a has a flat plate shape and has an outer surface serving as a substantially rectangular planar region. The boss portion 4b has a cylindrical shape and is arranged at the center position of one surface of the external connection portion 4a. The external connection portion 4a and the boss portion 4b are formed of, for example, nickel or copper plated with nickel.

  As shown in FIG. 7, the gasket 41 includes a flat plate portion 41a having a flat plate shape, a peripheral wall portion 41b, a notch portion 41c, an insertion hole 41d, and a boss portion 41e. A peripheral wall portion 41b is formed on the outer peripheral portion of the flat plate portion 41a on one surface of the flat plate portion 41a. A cutout portion 41c that is partially cut out is formed at the upper and lower centers of the peripheral wall portion 41b. Further, a substantially cylindrical boss portion 41e is formed on the other surface of the flat plate portion 41a. Further, a circular insertion hole 41d is formed in the boss portion 41e. The insertion hole 41d communicates with the center position on one surface of the flat plate portion 41a. The gasket 41 is made of, for example, an electrically insulating resin.

  As shown in FIG. 8, the lid insulating plate 42 includes a bottom portion 42a having a substantially rectangular shape, a peripheral wall portion 42b formed on the outer peripheral portion of the bottom portion 42a, and a notch obtained by partially cutting the peripheral wall portion 42b. A portion 42c and a hole 42d formed in the bottom portion 42a are provided. The lid insulating plate 42 is formed of, for example, an electrically insulating resin.

  As shown in FIG. 9, the holding plate 43 is formed between a long plate portion 43a, a short plate portion 43b, and a long plate portion 43a and a short plate portion 43b. 43c and a hole 43d formed in the outer circle 43c. The holding plate 43 is formed of, for example, aluminum or an aluminum alloy.

  As shown in FIG. 10, the insulating seal 44 includes a peripheral edge portion 44a and a hollow portion 44b formed inside the peripheral edge portion 44a. The insulating seal 44 is made of, for example, an electrically insulating resin.

  Here, as shown in FIG. 11, the gasket 41 is disposed between the stepped portion 213 and the negative electrode terminal 4. More specifically, the flat plate portion 41a and the peripheral wall portion 41b are fitted in the concave portion 213b in a state where the boss portion 41e of the gasket 41 is inserted into the hole 213c of the step portion 213.

  The lid insulating plate 42 is disposed inside the step portion 213. More specifically, the lid insulating plate 42 is disposed in contact with the inner surface of the stepped portion 213 in a state where the boss portion 41 e of the gasket 41 is inserted into the hole 42 d of the lid insulating plate 42.

  As described above, the gasket 41 and the lid insulating plate 42 as the insulator are integrally interposed between the stepped portion 213 of the first member 21 and the negative electrode terminal 4.

  The presser plate 43 is attached to the inside of the step portion 213. More specifically, the presser plate 43 is disposed in the peripheral wall portion 42 b in contact with a portion in the peripheral wall portion 42 b of the lid insulating plate 42. Further, the lead tab 5b of the electrode winding body 5 is connected to the surface of the long plate portion 43a. Furthermore, the tip of the boss 4b of the negative electrode terminal 4 is inserted into the hole 43d.

  The negative electrode terminal 4 is disposed in contact with the gasket 41 and the pressing plate 43. More specifically, the boss portion 4 b is inserted into the insertion hole 41 d of the gasket 41, and the external connection portion 4 a is fitted in the peripheral wall portion 41 b of the gasket 41. Further, the boss portion 4 b is inserted into the hole portion 43 d of the pressing plate 43 through the insertion hole 41 d of the gasket 41. Further, the tip end portion of the boss portion 4 b is caulked on the surface of the presser plate 43. As a result, the negative electrode terminal 4 is electrically insulated from the outer can 2 (stepped portion 213). Further, the negative electrode terminal 4 is electrically connected to the negative electrode of the electrode winding body 5 through the pressing plate 43 and the lead tab 5b.

  The insulating seal 44 is disposed on the outer periphery of the peripheral wall portion 41 b of the gasket 41. Further, the external connection portion 4 a of the negative electrode terminal 4 protrudes to the outside from the gasket 41 and the insulating seal 44.

[Features of exterior can 2]
Hereinafter, characteristic points of the outer can 2 will be described in detail.

  The first member 21 and the second member 22 are disposed to face each other with the electrode winding body 5 interposed therebetween in the thickness direction of the electrode winding body 5. The first member 21 has a box-like shape opened to the second member 22 side. For this reason, in a thin battery, compared with the case where the 1st member 21 is opened in a height direction and a width direction, opening can be made wide. As a result, even if the thickness of the outer can 2 is reduced, the electrode winding body 5 can be accommodated from the opening of the first member 21. Therefore, the battery can be made thinner.

  Moreover, the exterior can 2 has the space A and the space B in the inside, as shown in FIG. The space A is a space formed between the inner surface of the main body 212 and the inner surface of the second member 22, that is, a space corresponding to the inside of the main body 212. The space B is a space formed between the inner surface of the step portion 213 and the inner surface of the second member 22, that is, a space corresponding to the inside of the step portion 213. Since the dimension of the space B is smaller than the dimension of the space A in the thickness direction of the main body 212, the space B is formed narrower than the space A.

  As shown in FIG. 12, the space A is a space in which the electrode winding body 5 is accommodated, and has a size suitable for the space in which the electrode winding body 5 is accommodated. On the other hand, as shown in FIG. 12, the space B has a dimension smaller than the thickness of the electrode winding body 5 in the thickness direction of the electrode winding body 5. For this reason, the space B is not a space for housing the electrode winding body 5, but houses components necessary for electrically connecting the positive electrode terminal 3 and the negative electrode terminal 4 to the positive electrode and the negative electrode, respectively. It is a space to be.

  Thus, since the space B is a space narrower than the thickness dimension of the electrode winding body 5, the state in which the electrode winding body 5 was accommodated in the space A is maintained, and it penetrates into the space B. There is no such thing. That is, even when an external impact is applied to the nonaqueous electrolyte secondary battery 1A, the electrode winding body 5 does not move from the space A to the space B, and the positive electrode terminal 3 and the negative electrode in the stepped portion 213 The arrangement state of the terminals 4 can be maintained, and the safety of the nonaqueous electrolyte secondary battery 1A can be maintained.

[Features of positive terminal 3]
Hereinafter, characteristic points of the positive electrode terminal 3 will be described in detail.

  The positive electrode terminal 3 functions as an external connection terminal, and a flat external connection portion 3 b is disposed on the outer surface of the step portion 213. As a result, the external connection portion 3b is exposed to the outside. Therefore, the external connection part 3b can be easily connected to an external device.

  The liquid injection hole 213 a is sealed by the boss portion 3 c of the positive electrode terminal 3 after the electrolytic solution is injected into the outer can 2. For this reason, the external connection terminal and the sealing plug can be integrated into one member, and the number of parts of the nonaqueous electrolyte secondary battery 1A can be reduced.

[Features of negative electrode terminal 4]
Hereinafter, characteristic points of the negative electrode terminal 4 will be described in detail.

  The negative electrode terminal 4 functions as an external connection terminal, and a flat external connection portion 4 a is disposed on the outer surface of the step portion 213. As a result, the external connection portion 4a is exposed to the outside. Therefore, the external connection part 4a can be easily connected to an external device.

  The negative electrode terminal 4 is disposed so that the outer surface of the external connection portion 4 a is located between the outer surface of the main body portion 212 and the outer surface of the step portion 213. As shown in FIG. 12, in the state where the negative electrode terminal 4 is arranged in the stepped portion 213, the thickness dimension t3 from the outer surface of the second member 22 to the outer surface of the external connecting portion 4a is the thickness t1 of the main body portion 212. Smaller than. That is, the thickness of the portion where the negative electrode terminal 4 is disposed on the outer surface of the stepped portion 213 can be made thinner than the thickness of the main body portion 212.

  The negative electrode terminal 4 is fitted into the recess 213b via the gasket 41. For this reason, the negative electrode terminal 4 can be correctly arrange | positioned in the level | step-difference part 213. FIG.

  The gasket 41 and the lid insulating plate 42 as an insulator are integrally interposed between the stepped portion 213, the negative electrode terminal 4, and the holding plate 43. For this reason, the electrical insulation of the armored can 2 having the polarity of the positive electrode, the negative electrode terminal 4 and the presser plate 43 is ensured, and the airtightness inside the battery can be maintained.

  The negative electrode terminal 4 is fixed from the inside of the step portion 213. More specifically, the boss portion 4b of the negative electrode terminal 4 is inserted into the hole 43d of the holding plate 43 attached to the inside of the step portion 213, and the tip end portion of the boss portion 4b is located inside the step portion 213. It is caulked on the surface of the presser plate 43. For this reason, even if it receives the impact from the outside, the junction part of the negative electrode terminal 4 and the presser plate 43 is not influenced directly, and the junction part of the negative electrode terminal 4 and the presser plate 43 is set inside the outer can 2. Can be protected. Therefore, the safety of the negative electrode terminal 4 can be improved.

[Production method]
Hereinafter, an example of a manufacturing method of the nonaqueous electrolyte secondary battery 1A will be described.

  First, the electrode winding body 5 is prepared. Although the manufacturing method of the electrode winding body 5 is not specifically limited, If it illustrates, 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 slurry is dried, and the thickness and density are adjusted by calendering. Thereby, a positive electrode is obtained. The lead tab 5a 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 slurry is dried, and the thickness and density are adjusted by calendering. Thereby, a negative electrode is obtained. The lead tab 5b 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 winding body 5 is obtained.

  Next, the outer can 2 is prepared. The first member 21 of the outer can 2 is manufactured, for example, by pressing an aluminum or aluminum alloy plate. The second member 22 of the outer can 2 is manufactured by punching a plate of aluminum or an aluminum alloy, for example.

  Next, the positive electrode terminal 3, the negative electrode terminal 4, the gasket 41, the lid insulating plate 42, the holding plate 43, the insulating seal 44, and the insulating seal 6 are prepared. Although the manufacturing method of the positive electrode terminal 3 and the negative electrode terminal 4 is not specifically limited, If it illustrates, it will manufacture by die casting. The manufacturing method of the gasket 41, the lid insulating plate 42, the insulating seal 44, and the insulating seal 6 is not particularly limited, but for example, it is manufactured by injection molding. The presser plate 43 is manufactured by, for example, pressing an aluminum or aluminum alloy plate.

  First, the boss portion 41e of the gasket 41 is inserted into the hole 213c of the step portion 213, and the flat plate portion 41a and the peripheral wall portion 41b are fitted into the concave portion 213b.

  Thereafter, the boss 41 e of the gasket 41 is inserted into the hole 42 d of the lid insulating plate 42 inside the step 213, and the lid insulating plate 42 is attached to the inner surface of the step 213.

  With the gasket 41 and the lid insulating plate 42 combined, the boss portion 4b of the negative electrode terminal 4 is inserted into the insertion hole 41d of the gasket 41 from the outside, and the external connection portion 4a is fitted into the peripheral wall portion 41b of the gasket 41. .

  Further, the presser plate 43 is fitted into the peripheral wall portion 42 b of the lid insulating plate 42 from the inside of the stepped portion 213. At this time, the boss portion 4 b of the negative electrode terminal 4 is inserted into the hole portion 43 d of the holding plate 43 through the insertion hole 41 d of the gasket 41.

  Further, the tip portion of the boss portion 4 b is in a state of protruding from the hole portion 43 d of the pressing plate 43 to the inside of the step portion 213. In this state, the tip of the boss 4b is caulked on the surface of the pressing plate 43. Thereby, the gasket 41 and the lid insulating plate 42 are integrally interposed between the stepped portion 213 and the negative electrode terminal 4, and the negative electrode terminal 4 is fixed to the stepped portion 213 in this state.

  Next, the insulating seal 44 is disposed on the outer periphery of the peripheral wall portion 41 b of the gasket 41.

  After the negative electrode terminal 4 is disposed in the step portion 213, the electrode winding body 5 is accommodated in the first member 21 through the opening 211. Then, the lead tab 5 a of the electrode winding body 5 is welded to the inner surface of the stepped portion 213, and the lead tab 5 b of the electrode winding body 5 is welded to the holding plate 43. Thereby, the armored can 2 is electrically connected to the positive electrode, and the negative electrode terminal 4 is electrically connected to the negative electrode.

  Next, the opening 211 of the first member 21 is sealed with the second member 22. More specifically, in the state where the insulating member 6 is affixed to the second member 22 and the second member 22 is aligned with the opening 211 so that the surface on which the insulating seal 6 is affixed is inside, the opening 211 And the second member 22 are joined by seam welding. Thereafter, an electrolytic solution is injected from the injection hole 213a, and preliminary charging is performed as necessary.

  Thereafter, the boss portion 3 c of the positive electrode terminal 3 is press-fitted into the liquid injection hole 213 a, and the flat plate portion 3 a is disposed on the outer surface of the stepped portion 213.

  After the positive electrode terminal 3 is disposed on the step portion 213, the peripheral portion of the flat plate portion 3 a is welded to the outer surface of the step portion 213. Thereby, arrangement | positioning of the positive electrode terminal 3 is completed.

  Thereafter, the battery is charged to a predetermined capacity.

  Thus, the manufacture of the nonaqueous electrolyte secondary battery 1A is completed.

[Function and effect]
Below, the effect of the nonaqueous electrolyte secondary battery 1A by the 1st Embodiment of this invention is demonstrated.

  A nonaqueous electrolyte secondary battery 1A according to an embodiment of the present invention includes an electrode winding body 5 including a positive electrode and a negative electrode, and a polarity of a positive electrode, and the electrode winding is performed in the thickness direction of the electrode winding body 5. The outer casing 2 including the first member 21 and the second member 22 that are disposed to face each other with the body 5 interposed therebetween and are joined to each other to receive the electrode winding body 5, and the negative electrode of the electrode winding body 5. A negative electrode terminal 4. The first member 21 has a main body portion 212 having a thickness t1 and an outer surface that is disposed in contact with one end of the main body portion 212 and is located closer to the second member 22 than the outer surface of the main body portion 212. and a step portion 213 having a portion having a thickness t2 thinner than t1. The negative electrode terminal 4 has a flat plate shape, is disposed on one surface of the external connection portion 4a and the external connection portion 4a disposed on the outer surface of the step portion 213, and is inserted into the hole 213c of the step portion 213. And a boss portion 4b fixed inside the step portion 213.

  According to this embodiment, the first member 21 and the second member 22 are arranged to face each other with the electrode winding body 5 interposed therebetween in the thickness direction of the electrode winding body 5. The first member 21 has a box-like shape opened to the second member 22 side. For this reason, in a thin battery, compared with the case where the 1st member 21 is opened in a height direction and a width direction, opening can be made wide. As a result, even if the thickness of the outer can 2 is reduced, the electrode winding body 5 can be accommodated from the opening of the first member 21. Therefore, the battery can be made thinner. Further, since the external connection portion 4 a has a flat plate shape and is disposed on the outer surface of the step portion 213, an external device can be easily connected to the negative electrode terminal 4. Furthermore, since the boss portion 4b of the negative electrode terminal 4 is fixed inside the stepped portion 213, the joint portion of the negative electrode terminal 4 is not directly subjected to an impact from the outside of the battery, and the negative electrode terminal 4 does not come off the outer can 2. Can be

  Moreover, since the external connection part 4a is arrange | positioned on the outer surface of the level | step-difference part 213 which has an outer surface depressed rather than the outer surface of the main-body part 212, the thickness of the part which has arrange | positioned the external connection part 4a can be made thin.

  The nonaqueous electrolyte secondary battery 1A according to the embodiment of the present invention further includes a pressing plate 43 that is disposed inside the stepped portion 213, is electrically connected to the negative electrode of the electrode winding body 5, and includes a hole 43d. Further, the boss portion 4 b of the negative electrode terminal 4 is inserted into the hole portion 43 d of the holding plate 43, and the tip portion of the boss portion 4 b is fixed to the holding plate 43.

  According to this embodiment, even if an impact is applied from the outside, the joint portion between the boss portion 4b and the presser plate 43 is not directly affected, and the joint portion between the boss portion 4b and the presser plate 43 is not affected. Can be protected inside. In addition, since the holding plate 43 is electrically connected to the negative electrode of the electrode winding body 5 and is fixed to the boss 4b of the negative electrode terminal 4 inside the stepped portion 213, the negative electrode terminal 4 is connected to the electrode via the holding plate 43. The negative electrode of the wound body 5 can be conducted.

  The non-aqueous electrolyte secondary battery 1A according to one embodiment of the present invention is disposed between the outer surface of the step portion 213 and the external connection portion 4a, and the portion facing the hole 213c of the step portion 213 and the boss portion 4b. It is preferable to include a gasket 41 disposed between the cover 41 and a lid insulating plate 42 disposed between the inner surface of the step portion 213 and the presser plate 43.

  According to this embodiment, the gasket 41 and the lid insulating plate 42 are integrally interposed between the stepped portion 213, the negative electrode terminal 4, and the holding plate 43. For this reason, the electrical insulation of the armored can 2, the negative electrode terminal 4, and the holding plate 43 is ensured, and the airtightness inside the battery can be maintained.

[Modification of First Embodiment]
In the nonaqueous electrolyte secondary battery 1A according to the above embodiment, the outer can 2 and the positive electrode terminal 3 are used as the positive electrode and the negative electrode terminal 4 is used as the negative electrode. The negative electrode terminal 4 may be replaced with a positive electrode terminal.

  In the nonaqueous electrolyte secondary battery 1A according to the above embodiment, the external connection portion 4a is disposed such that the outer surface of the external connection portion 4a is located between the outer surface of the main body portion 212 and the outer surface of the step portion 213. However, the present invention is not limited to this configuration, and the external connection portion 4a may be arranged such that the outer surface of the external connection portion 4a is positioned in the same plane as the outer surface of the main body portion 212. With such a configuration, the thickness of the nonaqueous electrolyte secondary battery 1A can be made constant.

[Second Embodiment]
The nonaqueous electrolyte secondary battery 1B according to the second embodiment of the present invention is obtained by replacing the outer can 2 of the nonaqueous electrolyte secondary battery 1A with an outer can 2B as shown in FIG.

  The outer can 2 </ b> B includes a first member 21 </ b> B and a second member 22. The first member 21B is manufactured, for example, by pressing an aluminum or aluminum alloy plate. The first member 21B and the second member 22 are joined by, for example, seam welding.

  The first member 21B is obtained by replacing the stepped portion 213 of the first member 21 with an inclined portion 213B.

  As shown in FIG. 13 and FIG. 14, the inclined portion 213 </ b> B is formed so that the thickness decreases in an inclined manner from the thickness t <b> 1 of the main body portion 212 toward the side opposite to the main body portion 212 in the z direction.

  The positive electrode terminal 3 is disposed on the inclined portion 213B. More specifically, the external connection portion 3b is disposed on the outer surface of the inclined portion 213B. As a result, the external connection portion 3b is exposed to the outside. Therefore, the external connection part 3b can be easily connected to an external device.

  The negative terminal 4 is disposed on the inclined portion 213B. More specifically, the external connection portion 4a is disposed on the outer surface of the inclined portion 213B. As a result, the external connection portion 4a is exposed to the outside. Therefore, the external connection part 4a can be easily connected to an external device.

  Further, as shown in FIG. 14, in the state where the negative electrode terminal 4 is disposed on the inclined portion 213B, the thickness from the outer surface of the second member 22 to the outer surface of the external connection portion 4a is the thickness t1 of the main body portion 212. Gradually becomes thinner in the z direction.

  In this embodiment, since the external connection portion 3b of the positive electrode terminal 3 and the external connection portion 4a of the negative electrode terminal 4 are arranged on the outer surface of the inclined portion 213B, the terminal portion of the external device is formed in an inclined shape. Even in such a case, the external connection unit 3b and the external connection unit 4a can be more appropriately connected to the external device.

[Third Embodiment]
As shown in FIG. 15, a nonaqueous electrolyte secondary battery 1C according to the third embodiment of the present invention is obtained by replacing the outer can 2 of the nonaqueous electrolyte secondary battery 1A with an outer can 2C. In addition, the nonaqueous electrolyte secondary battery 1 </ b> C includes an insulating seal 44 </ b> C including a peripheral edge portion in which one region is expanded instead of the insulating seal 44.

  The outer can 2C has a width dimension in the x direction longer than that of the outer can 2.

  The outer can 2C includes a first member 21C and a second member 22C. The first member 21 </ b> C and the second member 22 </ b> C have a width dimension longer than that of the first member 21 and the second member 22. Other configurations relating to the second member 22 </ b> C are the same as those of the second member 22. The first member 21C is manufactured, for example, by pressing an aluminum or aluminum alloy plate. The second member 22C is manufactured by punching a plate of aluminum or an aluminum alloy, for example. The first member 21C and the second member 22C are joined by, for example, seam welding.

  The first member 21C includes an opening 211C, a main body 212C, and a step 213C.

  The opening 211C, the main body 212C, and the step 213C are longer in width than the opening 211, the main body 212, and the step 213.

  The positive terminal 3 and the negative terminal 4 are disposed in the step portion 213C.

  If it is this embodiment, the width | variety of the electrode winding body 5 accommodated in the inside of the armored can 2C can be made wide, and the higher capacity | capacitance electrode winding body 5 can be accommodated. In addition, since the positive electrode terminal 3 and the negative electrode terminal 4 can be arranged on the step portion 213C in a state where the positive electrode terminal 3 and the negative electrode terminal 4 are sufficiently spaced apart from each other, the positive electrode terminal is aligned with the position where the terminal of the external device is formed. 3 and the external connection part of the negative electrode terminal 4 can be connected to an external device.

[Modification of Third Embodiment]
In the non-aqueous electrolyte secondary battery 1C, as shown in FIG. 16, the positive electrode terminal 3 may be disposed on a surface perpendicular to the height direction of the step portion 213C. The positive electrode terminal 3 also serves as a sealing plug for an electrolyte injection hole. Other configurations are the same as those of the nonaqueous electrolyte secondary battery 1C.

  If it is this form, according to the position of the terminal of an external device, the external connection part of the positive electrode terminal 3 and the negative electrode terminal 4 can be connected to an external device. Moreover, according to this modification, the internal volume of the outer can 2C can be increased compared to the third embodiment. Therefore, for example, more electrolytic solution can be injected. Further, since the electrolytic solution is injected from the height direction, the electrolytic solution can easily penetrate into the electrode winding body 5.

  Moreover, as shown in FIG. 17, the positive electrode terminal 3 may be arrange | positioned in the surface perpendicular | vertical to the width direction of the main-body part 212C. The positive electrode terminal 3 also serves as a sealing plug for an electrolyte injection hole. Other configurations are the same as those of the nonaqueous electrolyte secondary battery 1C.

  Even in this form, the external connection portions of the positive electrode terminal 3 and the negative electrode terminal 4 can be connected to the external device in accordance with the position of the terminal of the external device.

  Furthermore, as shown in FIG. 18, the sealing plug 7 of another member is attached to the liquid injection hole formed in the step portion 213C, and the positive electrode terminal 3 is disposed on the surface perpendicular to the height direction of the step portion 213C. Good. Other configurations are the same as those of the nonaqueous electrolyte secondary battery 1C.

  Even in this form, the external connection portions of the positive electrode terminal 3 and the negative electrode terminal 4 can be connected to the external device in accordance with the position of the terminal of the external device. Moreover, if it is this form, it will be easy to osmose | permeate electrolyte solution to the electrode winding body 5. FIG.

[Fourth Embodiment]
As shown in FIG. 19, the nonaqueous electrolyte secondary battery 1D according to the fourth embodiment of the present invention is obtained by replacing the outer can 2 of the nonaqueous electrolyte secondary battery 1A with an outer can 2D. Further, in the non-aqueous electrolyte secondary battery 1D, the arrangement of the positive electrode terminal 3 is different from that in the non-aqueous electrolyte secondary battery 1A. Furthermore, in the nonaqueous electrolyte secondary battery 1D, an insulating seal 44D including a peripheral edge portion where one region is expanded is provided instead of the insulating seal 44.

  The outer can 2D has a width dimension longer than that of the outer can 2. For this reason, the electrode winding body 5 having a wider width can be accommodated.

  The outer can 2D includes a first member 21D and a second member 22D. The first member 21 </ b> D and the second member 22 </ b> D have a width dimension longer than that of the first member 21 and the second member 22. The first member 21D is manufactured, for example, by pressing an aluminum or aluminum alloy plate. The second member 22D is manufactured, for example, by punching a plate of aluminum or aluminum alloy. The first member 21D and the second member 22D are joined by, for example, seam welding.

  The first member 21D includes an opening 211D, a main body 212D, and a step 213D.

  The opening 211D and the main body 212D are longer in width than the opening 211 and the main body 212. Further, the step portion 213D is disposed in a part in the width direction and has an outer surface that is recessed in the y direction from the outer surface of the main body portion 212. In other words, only the step that is recessed in the y direction from the outer surface of the main body 212D is the step 213D. Furthermore, the liquid injection hole is formed in a surface perpendicular to the height direction of the main body 212D.

  The positive electrode terminal 3 is disposed on a surface perpendicular to the height direction of the main body 212D. The positive electrode terminal 3 also serves as a sealing plug for an electrolyte injection hole. Moreover, the negative electrode terminal 4 is arrange | positioned at the level | step-difference part 213D.

  In this embodiment, it is only necessary to form the step portion 213D only in the portion where the negative electrode terminal 4 is disposed. Further, by arranging the positive electrode terminal 3 on a surface perpendicular to the height direction of the main body 212D, the external connection portions of the positive electrode terminal 3 and the negative electrode terminal 4 can be connected to the external device in accordance with the position of the terminal of the external device. . Furthermore, since the nonaqueous electrolyte secondary battery 1D has the main body portion 212D having a larger volume than the main body portion 212, the internal volume of the outer can can be increased as compared with the nonaqueous electrolyte secondary battery 1A. Therefore, for example, more electrolytic solution can be injected.

[Fifth Embodiment]
As shown in FIG. 20, the nonaqueous electrolyte secondary battery 1E according to the fifth embodiment of the present invention is obtained by replacing the outer can 2 of the nonaqueous electrolyte secondary battery 1A with an outer can 2E. Moreover, the nonaqueous electrolyte secondary battery 1E is provided with a sealing plug 7 for sealing the liquid injection hole.

  The outer can 2E has a longer width than the outer can 2. For this reason, the electrode winding body 5 having a wider width can be accommodated.

  The outer can 2E includes a first member 21E and a second member 22E. As shown in FIG. 20, the first member 21 </ b> E and the second member 22 </ b> E have a width dimension longer than that of the first member 21 and the second member 22. The first member 21E is manufactured, for example, by pressing an aluminum or aluminum alloy plate. The second member 22E is manufactured by punching a plate of aluminum or an aluminum alloy, for example. The first member 21E and the second member 22E are joined by, for example, seam welding.

  The first member 21E has an opening 211E, a main body 212E, and a step 213E.

  The opening 211E and the main body 212E are longer in width than the opening 211 and the main body 212. Further, the step portion 213E is disposed at both end portions in the width direction and has an outer surface that is recessed in the y direction from the outer surface of the main body portion 212E. In other words, only the step that is recessed in the y direction from the outer surface of the main body 212E is the step 213E. Furthermore, the liquid injection hole is formed in a surface perpendicular to the height direction of the main body 212E. The liquid injection hole is sealed with a sealing plug 7.

  The positive terminal 3 and the negative terminal 4 are disposed in the step portion 213E.

  In this embodiment, it is only necessary to form the stepped portion 213E only in the portion where the positive electrode terminal 3 and the negative electrode terminal 4 are arranged. Moreover, since the nonaqueous electrolyte secondary battery 1E has the main body part 212E having a larger volume than the main body part 212, the internal volume of the outer can can be increased as compared with the nonaqueous electrolyte secondary battery 1A. Therefore, for example, more electrolytic solution can be injected.

[Sixth Embodiment]
The nonaqueous electrolyte secondary battery 1F according to the sixth embodiment of the present invention is obtained by replacing the outer can 2 of the nonaqueous electrolyte secondary battery 1A with an outer can 2F as shown in FIG. In addition, the nonaqueous electrolyte secondary battery 1F includes an insulating seal 44F including a peripheral edge portion in which one region is expanded instead of the insulating seal 44.

  The outer can 2F has a width dimension longer than that of the outer can 2. For this reason, the electrode winding body 5 having a wider width can be accommodated. The outer can 2F has a substantially hexagonal shape in plan view. More specifically, the outer can 2F has a shape in which one of the four corners of a quadrangle is cut out in plan view.

  The outer can 2F includes a first member 21F and a second member 22F. The first member 21 </ b> F and the second member 22 </ b> F have a width dimension longer than that of the first member 21 and the second member 22. Further, the first member 21F and the second member 22F have a shape in which one of the four corners of a quadrangle is cut out in plan view. The first member 21F is manufactured, for example, by pressing an aluminum or aluminum alloy plate. The second member 22F is manufactured, for example, by punching a plate of aluminum or aluminum alloy. The first member 21F and the second member 22F are joined by, for example, seam welding.

  The first member 21F has an opening 211F, a main body 212F, and a step 213F.

  The opening 211F, the main body 212F, and the step 213F are longer in width than the opening 211, the main body 212, and the step 213. Further, the opening 211F has a shape in which one of the four corners of the quadrangle is cut out in plan view. Further, the stepped portion 213F is formed so that the width dimension is smaller than the width dimension of the main body portion 212F.

  The positive electrode terminal 3 and the negative electrode terminal 4 are disposed in the step portion 213F.

  According to this embodiment, the external connection portions of the positive electrode terminal 3 and the negative electrode terminal 4 arranged in the step portion 213F having a smaller width dimension than the main body portion 212F can be connected to the terminal portion of a small external device.

[Seventh Embodiment]
The nonaqueous electrolyte secondary battery 1G according to the seventh embodiment of the present invention is obtained by replacing the outer can 2 of the nonaqueous electrolyte secondary battery 1A with an outer can 2G as shown in FIG. In addition, the non-aqueous electrolyte secondary battery 1G includes an insulating seal 44G including a peripheral portion in which a region on one side is expanded instead of the insulating seal 44.

  The outer can 2G has a width dimension longer than that of the outer can 2. For this reason, the electrode winding body 5 having a wider width can be accommodated. The outer can 2G has a substantially pentagonal shape in plan view. More specifically, the outer can 2G has a shape in which one of the four corners of the quadrangle is cut obliquely in plan view.

  The outer can 2G includes a first member 21G and a second member 22G. The first member 21 </ b> G and the second member 22 </ b> G have a width dimension longer than that of the first member 21 and the second member 22. Further, the first member 21G and the second member 22G have a shape in which one of the four corners of a quadrilateral is cut obliquely in plan view. The first member 21G is manufactured, for example, by pressing an aluminum or aluminum alloy plate. The second member 22G is manufactured, for example, by punching a plate of aluminum or an aluminum alloy. The first member 21G and the second member 22G are joined by, for example, seam welding.

  The first member 21G has an opening 211G, a main body 212G, and a step 213G.

  The opening 211G, the main body 212G, and the step 213G are longer in width than the opening 211, the main body 212, and the step 213. In addition, the opening 211G has a shape in which one of the four corners of the quadrangle is obliquely cut in a plan view. The step portion 213G has a shape in which one of the four corners of the quadrilateral is cut obliquely in plan view. As shown in FIG. 22, the width of the main body portion 212G is substantially constant, while the width of the step portion 213G changes along the height direction.

  The positive electrode terminal 3 and the negative electrode terminal 4 are disposed in the step portion 213G.

  According to this embodiment, it becomes easy to connect the external connection portions of the positive electrode terminal 3 and the negative electrode terminal 4 arranged in the step portion 213G having a smaller width than the main body portion 212G to the terminal portion of a small external device.

[Eighth Embodiment]
As shown in FIG. 23, the nonaqueous electrolyte secondary battery 1H according to the eighth embodiment of the present invention is obtained by replacing the outer can 2 of the nonaqueous electrolyte secondary battery 1A with an outer can 2H. In addition, the nonaqueous electrolyte secondary battery 1H includes an insulating seal 44H including a peripheral portion in which a region on one side is expanded instead of the insulating seal 44.

  The outer can 2H has a width dimension longer than that of the outer can 2. For this reason, the electrode winding body 5 having a wider width can be accommodated. The outer can 2H has a substantially hexagonal shape in plan view, unlike the outer can 2 having a rectangular shape in plan view. More specifically, the outer can 2H has a portion having a substantially constant width and a portion having a width that narrows along the height direction in the vicinity of the lower end in the height direction.

  The outer can 2H includes a first member 21H and a second member 22H. The first member 21 </ b> H and the second member 22 </ b> H have a width dimension longer than that of the first member 21 and the second member 22. In addition, the first member 21H and the second member 22H have a portion having a substantially constant width and a portion in which the width narrows along the height direction in the vicinity of the lower end in the height direction. The first member 21H is manufactured, for example, by pressing an aluminum or aluminum alloy plate. The second member 22H is manufactured by punching a plate of aluminum or an aluminum alloy, for example. The first member 21H and the second member 22H are joined by, for example, seam welding.

  The first member 21H has an opening 211H, a main body 212H, and a step 213H.

  The opening 211H, the main body 212H, and the step 213H are longer in width than the opening 211, the main body 212, and the step 213. In addition, the opening 211H has a portion having a substantially constant width and a portion in which the width becomes narrow along the height direction in the vicinity of the lower end in the height direction. The main body portion 212H also has a portion having a substantially constant width and a portion having a width narrowing along the height direction in the vicinity of the lower end in the height direction. As shown in FIG. 24, the electrode winding body 5 is accommodated in a portion where the width of the main body portion 212H is substantially constant.

  The positive electrode terminal 3 and the negative electrode terminal 4 are disposed in the step portion 213H.

  In this embodiment, the outer can 2H has a portion having a substantially constant width and a portion in which the width is narrowed in the height direction near the lower end in the height direction. The nonaqueous electrolyte secondary battery 1H can be accommodated in accordance with the form of the device to be used. Moreover, the electrode winding body 5 can be kept away from the welding part of the opening part 211H and the 2nd member 22H. Therefore, the influence of the heat which the electrode winding body 5 receives at the time of welding can be reduced. Moreover, more electrolyte solution can be injected.

[Ninth Embodiment]
As shown in FIG. 25, the nonaqueous electrolyte secondary battery 1I according to the ninth embodiment of the present invention is obtained by replacing the outer can 2 of the nonaqueous electrolyte secondary battery 1A with an outer can 2I. Further, in the non-aqueous electrolyte secondary battery 1I, the arrangement of the positive electrode terminal 3 is different from that in the non-aqueous electrolyte secondary battery 1A. Further, the nonaqueous electrolyte secondary battery 1I includes an insulating seal 44I including a peripheral edge portion in which one region is expanded instead of the insulating seal 44.

  The outer can 2I has a longer width than the outer can 2. For this reason, the electrode winding body 5 having a wider width can be accommodated. The outer can 2I has a substantially hexagonal shape in plan view. More specifically, the outer can 2I has a shape in which one of the four corners of a quadrangle is cut out in plan view.

  The outer can 2I includes a first member 21I and a second member 22I. The first member 21 </ b> I and the second member 22 </ b> I have a width dimension longer than that of the outer can 2. Further, the first member 21I and the second member 22I have a shape in which one of the four corners of a quadrangle is cut out in plan view. The first member 21I is manufactured, for example, by pressing an aluminum or aluminum alloy plate. The second member 22I is manufactured by punching a plate of aluminum or an aluminum alloy, for example. The first member 21I and the second member 22I are joined by, for example, seam welding.

  The first member 21I has an opening 211I, a main body 212I, and a step 213I.

  The opening 211I, the main body 212I, and the step 213I are longer in width than the opening 211, the main body 212, and the step 213. The opening 211I has a shape in which one of the four corners of the quadrangle is cut out in plan view. Further, the step portion 213I is formed so that the width dimension thereof is smaller than the width dimension of the main body portion 212I. Furthermore, the liquid injection hole is formed in a surface perpendicular to the height direction of the main body portion 212I.

  The positive electrode terminal 3 is disposed on a surface perpendicular to the height direction of the main body portion 212I. The positive electrode terminal 3 also serves as a sealing plug for an electrolyte injection hole. Moreover, the negative electrode terminal 4 is arrange | positioned at the level | step-difference part 213I.

  In this embodiment, it is only necessary to form the stepped portion 213I only in the portion where the negative electrode terminal 4 is disposed. Further, by arranging the positive electrode terminal 3 on the surface perpendicular to the height direction of the main body 212I, the external connection portions of the positive electrode terminal 3 and the negative electrode terminal 4 can be connected to the external device in accordance with the position of the terminal of the external device. .

[Tenth embodiment]
As shown in FIG. 26, the nonaqueous electrolyte secondary battery 1J according to the tenth embodiment of the present invention is obtained by replacing the outer can 2 of the nonaqueous electrolyte secondary battery 1A with an outer can 2J. In addition, the nonaqueous electrolyte secondary battery 1J includes an insulating seal 44J including a peripheral portion in which one region is expanded instead of the insulating seal 44.

  The outer can 2J has a longer width than the outer can 2. For this reason, the electrode winding body 5 having a wider width can be accommodated.

  The outer can 2J includes a first member 21J and a second member 22J. The first member 21 </ b> J and the second member 22 </ b> J have a width dimension longer than that of the outer can 2. The first member 21J is manufactured, for example, by pressing an aluminum or aluminum alloy plate. The second member 22J is manufactured, for example, by punching a plate of aluminum or aluminum alloy. The first member 21J and the second member 22J are joined by, for example, seam welding.

  The first member 21J has an opening 211J, a main body 212J, and a step 213J.

  The positive electrode terminal 3 and the negative electrode terminal 4 are disposed in the step portion 213J.

  Here, FIG. 27 is a sectional view taken along line XXVII-XXVII in FIG. As shown in FIG. 27, the peripheral wall portion of the first member 21J extended in the y direction has a width dimension that increases toward the opening 211J. The second member 22J has an outer surface that has an area larger than the area of the outer surface of the first member 21J.

  FIG. 28 is a cross-sectional view of a nonaqueous electrolyte secondary battery 1A shown for comparison. In the nonaqueous electrolyte secondary battery 1 </ b> A, the peripheral wall portion of the first member 21 has a constant dimension in the width direction toward the opening 211. For this reason, as apparent from the comparison between FIG. 27 and FIG. 28, the distance from the welded portion W of the opening 211J and the second member 22J to the electrode winding body 5 is greater than the opening 211 and the second member. It becomes larger than the distance from the welding location W to 22 to the electrode winding body 5. That is, in the nonaqueous electrolyte secondary battery 1J, the welded portion W between the opening 211J and the second member 22J can be moved away from the electrode winding body 5. Thereby, the influence of the heat at the time of welding to the electrode winding body 5 can be reduced.

  Note that the peripheral wall portion of the first member 21J has not only a dimension in the width direction but also a dimension in the height direction that increases toward the opening 211J. As a result, all of the welds can be kept away from the electrode winding body 5. Therefore, the influence of heat at the time of welding to the electrode winding body 5 can be further reduced.

  If the peripheral wall portion of the first member 21J is formed so that at least one of the end sides on the opening 211J side is away from the electrode winding body 5, there is an advantageous effect as compared with the nonaqueous electrolyte secondary battery 1A. can get. For example, in FIG. 27, the peripheral wall portion of the first member 21J on both sides in the width direction is inclined outward in the width direction, but only the peripheral wall portion of the first member 21J on one side in the width direction is on the outer side in the width direction. You may incline toward.

  Further, as shown in FIGS. 29 and 30, the peripheral wall portion of the first member 21J may be curved.

[Eleventh embodiment]
The nonaqueous electrolyte secondary battery 1K according to the eleventh embodiment of the present invention is obtained by replacing the outer can 2 of the nonaqueous electrolyte secondary battery 1A with an outer can 2K as shown in FIG.

  Similar to the outer can 2, the outer can 2 </ b> K includes a first member 21 </ b> K and a second member 22 </ b> K that are disposed to face each other with the electrode wound body 5 in the thickness direction of the electrode wound body 5. The first member 21K has a substantially flat plate shape. The second member 22K has a box-like shape opened to one side in the thickness direction. The first member 21K and the second member 22K are manufactured, for example, by pressing an aluminum or aluminum alloy plate. The first member 21K and the second member 22K are joined by, for example, seam welding.

  As shown in FIG. 32, the first member 21K has an outer surface that has a flat plate shape that is substantially rectangular in plan view. The first member 21K includes a main body portion 212K and a step portion 213K.

  As shown in FIG. 32, the main body 212K has a thickness t4. The step portion 213K is disposed in contact with one end of the main body portion 212K in the z direction. As shown in FIG. 32, the stepped portion 213 </ b> K has an outer surface that is recessed toward the second member 22 </ b> K with respect to the outer surface of the main body portion 212 </ b> K in the entire x direction. The step portion 213K has a thickness t5 that is thinner than the thickness t4 of the main body portion 212K.

  As shown in FIG. 32, the second member 22K has a box-like shape opened to the first member 21K side. The second member 22K has an opening 221K located on one side in the thickness direction. The opening 221K is formed as a part that is fully open on the opposite side of the outer surface of the second member 22K. More specifically, the opening 221K is a portion surrounded by a peripheral wall portion extending in the y direction from the outer periphery of the outer surface of the second member 22K. The insulating seal 6 is attached to the inner surface of the second member 22K that is positioned opposite the lead tabs 5a and 5b.

  The positive electrode terminal 3 is disposed on the step portion 213K of the first member 21K. Moreover, the negative electrode terminal 4 is arrange | positioned at the level | step-difference part 213K of the 1st member 21K. Since the configuration and arrangement relating to the positive electrode terminal 3 and the negative electrode terminal 4 are the same as those according to the first embodiment, the details are omitted.

  Even in this embodiment, the first member 21 </ b> K and the second member 22 </ b> K are disposed to face each other with the electrode winding body 5 interposed therebetween in the thickness direction of the electrode winding body 5. The second member 22K has a box-like shape opened to the first member 21K side. For this reason, in a thin battery, compared with the case where the 2nd member 22K is opened in a height direction or a width direction, opening can be made wide. As a result, even if the thickness of the outer can 2K is reduced, the electrode winding body 5 can be accommodated from the opening of the second member 22K. Therefore, the battery can be made thinner.

[Twelfth embodiment]
A nonaqueous electrolyte secondary battery 1L according to a twelfth embodiment of the present invention is obtained by replacing the outer can 2 of the nonaqueous electrolyte secondary battery 1A with an outer can 2L, as shown in FIG.

  Similar to the outer can 2, the outer can 2 </ b> L includes a first member 21 </ b> L and a second member 22 </ b> L that are arranged to face each other with the electrode wound body 5 in the thickness direction of the electrode wound body 5. The first member 21L and the second member 22L have a box-like shape opened to one side in the thickness direction. The first member 21L and the second member 22L are manufactured, for example, by pressing an aluminum or aluminum alloy plate. The first member 21L and the second member 22L are joined by, for example, seam welding.

  As shown in FIG. 34, the first member 21L has a box-like shape opened to the second member 22L side. The first member 21L has an outer surface that has a substantially rectangular flat plate shape in plan view. The first member 21L includes an opening 211L, a main body 212L, and a step 213L.

  As shown in FIG. 34, the main body portion 212L has a thickness t6. The step portion 213L is disposed in contact with one end of the main body portion 212L in the z direction. As shown in FIG. 34, the stepped portion 213L has an outer surface that is recessed toward the second member 22L with respect to the outer surface of the main body portion 212L in the entire x direction. The step portion 213L has a thickness t7 that is thinner than the thickness t6 of the main body portion 212L.

  As shown in FIG. 34, the second member 22L has a box-like shape opened to the first member 21L side. The second member 22L has an opening 221L located on one side in the thickness direction. The opening 221L is formed as a part that is fully open on the opposite side of the outer surface of the second member 22L. More specifically, the opening 221L is a portion surrounded by a peripheral wall portion extending in the y direction from the outer periphery of the outer surface of the second member 22L. The insulating seal 6 is attached to the inner surface of the second member 22L that is positioned opposite the lead tabs 5a and 5b.

  The positive electrode terminal 3 is disposed on the step portion 213L of the first member 21L. Moreover, the negative electrode terminal 4 is arrange | positioned at the level | step-difference part 213L of 21 L of 1st members. Since the configuration and arrangement relating to the positive electrode terminal 3 and the negative electrode terminal 4 are the same as those according to the first embodiment, the details are omitted.

  Even in this embodiment, the first member 21 </ b> L and the second member 22 </ b> L are disposed to face each other with the electrode winding body 5 interposed therebetween in the thickness direction of the electrode winding body 5. The first member 21L has a box-like shape opened to the second member 22L side. The second member 22L has a box-like shape opened to the first member 21L side. For this reason, in a thin battery, compared with the case where the 1st member 21L and the 2nd member 22L are opened in a height direction or a width direction, opening can be made wide. As a result, even if the thickness of the outer can 2L is reduced, the electrode winding body 5 can be accommodated from the opening of the first member 21L or the opening of the second member 22L. Therefore, the battery can be made thinner.

[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 laminate 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 negative. Alternatively, the outer can may be insulated from both the positive electrode and the negative electrode.

  In the above, various embodiments and modifications thereof have been illustrated. As a result, the nonaqueous electrolyte secondary battery according to the embodiment of the present invention only needs to have the following configuration. That is, the non-aqueous electrolyte secondary battery has an electrode body including a positive electrode and a negative electrode, and a polarity of either the positive electrode or the negative electrode, and is disposed opposite to each other with the electrode body sandwiched in the thickness direction of the electrode body. And an outer can including a first member and a second member that are joined to each other to accommodate the electrode body, and an external connection terminal that is electrically connected to an electrode having a polarity opposite to the polarity of the outer can in the electrode body. The first member is disposed in contact with the first main body portion having the first thickness and one end of the first main body portion, and is located on the second member side with respect to the outer surface of the first main body portion. A second body portion (stepped portion or inclined portion) including at least a portion having a surface and a second thickness that is thinner than the first thickness. The external connection terminal has a flat plate shape, and is disposed on the outer surface of the second main body portion, on one surface of the external connection portion, and in the insertion hole of the second main body portion. And a boss portion that is inserted and fixed inside the second main body portion.

  According to said structure, since a 1st member and a 2nd member are opposingly arranged on both sides of an electrode body in the thickness direction of an electrode body, opening of a 1st member or a 2nd member can be made wide. it can. As a result, even if the thickness of the outer can is reduced, the electrode body can be accommodated from the opening of the first member or the second member, and the battery can be made thinner. Moreover, since the external connection part is arrange | positioned on the outer surface of the 2nd main-body part, and has a flat plate shape, an external apparatus can be easily connected to an external connection terminal. Furthermore, since the boss part of the external connection terminal is fixed inside the second main body part, the joint part of the external connection terminal is not directly subjected to an impact from the outside of the battery, and the external connection terminal does not come off the outer can. Can be.

  The non-aqueous electrolyte secondary battery further includes a pressing plate that is disposed inside the second main body, is electrically connected to an electrode body having a polarity opposite to the polarity of the outer can, and includes a hole. It is preferable that the portion is inserted into the hole of the presser plate and the tip of the boss portion is fixed to the presser plate.

  According to this configuration, even when an impact is applied from the outside, the joint portion between the boss portion of the external connection terminal and the press plate is not directly affected, and the joint portion between the boss portion of the external connection terminal and the press plate is externally provided. Can be protected inside the can. In addition, since the press plate is electrically connected to the electrode of the electrode body having a polarity opposite to the polarity of the outer can, and is fixed to the boss portion of the external connection terminal inside the second main body portion, via the press plate, The external connection terminal can be conducted to the electrode of the electrode body having a polarity opposite to the polarity of the outer can.

  Furthermore, in the nonaqueous electrolyte secondary battery according to one embodiment of the present invention, the insulator is disposed between the outer surface of the second main body portion and the external connection portion, and the insertion hole of the second main body portion. The first insulator (gasket) disposed between the portion facing the boss and the boss portion, and the second insulator (lid insulation) disposed between the inner surface of the second main body portion and the presser plate Plate).

  According to this configuration, the first and second insulators are integrated and interposed between the second main body portion, the external connection terminal, and the presser plate. For this reason, the electrical insulation of an exterior can, an external connection terminal, and a holding plate is ensured, and the airtightness inside a battery can be maintained.

  In the nonaqueous electrolyte secondary battery, it is preferable that the first member has a box shape opened to the second member side.

  According to this configuration, the electrode body can be accommodated from the opening of the first member.

  In the nonaqueous electrolyte secondary battery, it is preferable that the second member has a box shape opened to the first member side.

  According to this configuration, the electrode body can be accommodated from the opening of the second member.

  In the nonaqueous electrolyte secondary battery, it is preferable that the first member has a box-like shape opened to the second member side, and the second member has a box-like shape opened to the first member side.

  According to this configuration, the electrode body can be accommodated from the opening of the first member or the opening of the second member.

  INDUSTRIAL APPLICABILITY The present invention can be industrially used as a nonaqueous electrolyte secondary battery in which an external device can be easily connected and the external connection terminal is difficult to come off while being thinned.

  1A to 1L non-aqueous electrolyte secondary battery, 2 outer can, 21 first member, 211 opening, 212 main body, 213 stepped portion, 22 second member, 3 positive electrode terminal, 4 negative electrode terminal, 41 gasket, 42 lid insulation Plate, 43 Presser plate, 44 Insulation seal, 5 Electrode winding body, 6 Insulation seal

Claims (9)

An electrode body including a positive electrode and a negative electrode;
A first member and a second member having a polarity of either a positive electrode or a negative electrode, arranged opposite to each other with the electrode body interposed therebetween in the thickness direction of the electrode body, and joined to each other to accommodate the electrode body An outer can containing,
An external connection terminal electrically connected to an electrode having a polarity opposite to the polarity of the outer can in the electrode body,
The first member is
A first body portion having a first thickness;
The second main body is disposed in contact with one end of the first main body, has an outer surface located on the second member side with respect to the outer surface of the first main body, and is thinner than the first thickness. A second body portion including at least a portion having a thickness of
The external connection terminal is
An external connection portion having a flat shape and disposed on the outer surface of the second body portion;
A non-aqueous electrolyte secondary battery comprising: a boss portion disposed on one surface of the external connection portion and inserted into an insertion hole of the second main body portion and fixed inside the second main body portion. . The nonaqueous electrolyte secondary battery according to claim 1,
Further comprising a holding plate disposed inside the second main body portion, electrically connected to the electrode of the electrode body having a polarity opposite to the polarity of the outer can, and including a hole portion;
The non-aqueous electrolyte secondary battery, wherein the boss portion is inserted into a hole portion of the presser plate, and a tip portion of the boss portion is fixed to the presser plate. The nonaqueous electrolyte secondary battery according to claim 1 or 2,
A nonaqueous electrolyte secondary battery further comprising an insulator disposed between the external connection terminal and the pressing plate and the second main body. The nonaqueous electrolyte secondary battery according to any one of claims 1 to 3,
The insulator is
1st arrange | positioned between the outer surface of the said 2nd main-body part and the said external connection part, and between the part which faces the insertion hole of the said 2nd main-body part, and the said boss | hub part An insulator;
A nonaqueous electrolyte secondary battery comprising: a second insulator disposed between an inner surface of the second main body and the presser plate. The nonaqueous electrolyte secondary battery according to any one of claims 1 to 4,
The second main body includes a stepped portion having an outer surface that is recessed from the outer surface of the first main body,
The external connection part is a non-aqueous electrolyte secondary battery disposed on an outer surface of the step part. The nonaqueous electrolyte secondary battery according to any one of claims 1 to 4,
The second main body includes an inclined portion whose thickness is inclined from the first thickness toward the opposite side to the first main body,
The external connection part is a non-aqueous electrolyte secondary battery disposed on an outer surface of the inclined part. The nonaqueous electrolyte secondary battery according to any one of claims 1 to 6,
The first member is a non-aqueous electrolyte secondary battery having a box-like shape opened to the second member side. The nonaqueous electrolyte secondary battery according to any one of claims 1 to 6,
The second member is a non-aqueous electrolyte secondary battery having a box-like shape opened to the first member side. The nonaqueous electrolyte secondary battery according to any one of claims 1 to 6,
The first member has a box-like shape opened to the second member side,
The second member is a non-aqueous electrolyte secondary battery having a box-like shape opened to the first member side.

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