Non-aqueous electrolyte secondary battery

Abstract

A non-aqueous electrolyte secondary battery includes: an electrode body comprising a positive electrode plate and a negative electrode plate; a square outer casing having an opening and housing the electrode body; a sealing plate; electrode terminals disposed on the sealing plate; a first current collector disposed between the electrode body and the sealing plate and connected to the electrode terminals; an insulating member disposed between the sealing plate and the first current collector; a second current collector disposed between the electrode body and a sidewall of the square outer casing and connected to the first current collector; and a tab assembly extending from the electrode body toward the sidewall and connected to the second current collector. The second current collector is composed of a flat plate having a surface parallel to the sidewall. The tab assembly is connected to the second current collector and is bent parallel to the sidewall on the connection side connected to the second current collector. The second current collector is positioned on the first current collector by a guide extending from the insulating member.

Description

Technical Field

[0001] The present disclosure relates to a nonaqueous electrolyte secondary battery. Background Art

[0002] In non-aqueous electrolyte secondary batteries such as lithium ion batteries, there is known a structure in which a tab group extending from an electrode body housed in a rectangular outer body is connected to an external terminal provided on a sealing plate via a current collector.

[0003] Patent document 1 discloses a current collector, which is composed of a base portion arranged between a sealing plate and an electrode body, and a leg portion extending from the end of the base portion along the side wall of the outer body toward the bottom. The base portion is connected to an external terminal, and the leg portion is connected to a plate stack (tab group) led out from the electrode body.

[0004] Patent Document 1: Japanese Patent Publication No. 2016-85875 Summary of the invention

[0005] In the current collector disclosed in Patent Document 1, since the leg portion is disposed between the electrode body and the side wall of the outer casing, the space where the leg portion is disposed becomes a dead space that does not contribute to power generation, thus causing a decrease in the volume energy density of the battery.

[0006] The non-aqueous electrolyte secondary battery disclosed herein comprises an electrode body, a square outer body, a sealing plate, an electrode terminal, a first current collector, an insulating component, a second current collector and a tab group, wherein the electrode body comprises a positive electrode plate and a negative electrode plate, the square outer body has an opening and accommodates the electrode body, the sealing plate seals the opening, the electrode terminal is disposed on the sealing plate, the first current collector is disposed between the electrode body and the sealing plate and is connected to the electrode terminal, and the insulating component is disposed between the sealing plate and the first current collector. The second current collector is arranged between the electrode body and the side wall of the square outer casing and is connected to the first current collector. The tab group extends from the electrode body toward the side wall and is connected to the second current collector. The second current collector is composed of a flat plate having a surface parallel to the side wall. The tab group is connected to the second current collector and is bent parallel to the side wall on the connecting portion side connected to the second current collector. The second current collector is positioned on the first current collector by a guide portion extending from the insulating component.

[0007] According to the present disclosure, it is possible to provide a nonaqueous electrolyte secondary battery having a high volume energy density and an easily assembled structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a perspective view showing a non-aqueous electrolyte secondary battery;

[0009] Figure 2 is a cross-sectional view showing the internal structure of the nonaqueous electrolyte secondary battery involved in the prior application;

[0010] Figure 3 is a diagram showing the vicinity of the connection portion between the second current collector and the tab group before the tab group is bent;

[0011] Figure 4 is a diagram showing the vicinity of the connection portion between the second current collector and the tab group after the tab group is bent;

[0012] Figure 5 is a diagram showing a plurality of electrode bodies and a sealing plate connected to each other via a first current collector and a second current collector according to the prior application;

[0013] Figure 6 is a cross-sectional view showing the internal structure of the nonaqueous electrolyte secondary battery according to the present embodiment;

[0014] Figure 7 is a perspective view showing the vicinity of a sealing plate;

[0015] Figure 8 This is an exploded perspective view showing the components near the sealing plate after being exploded;

[0016] Fig. 9 is a perspective view showing a second current collector;

[0017] Fig.10 is a diagram showing a state in which a plurality of electrode bodies having second current collectors connected to a tab group are arranged;

[0018] Fig.11 is a diagram showing a method of connecting the second current collector to the first current collector (before bending the tab group);

[0019] Fig.12 is a diagram showing a method of connecting the second current collector to the first current collector (after bending the tab group);

[0020] Fig.13 is a diagram showing a guide portion according to a first modification of the present embodiment;

[0021] Fig.14 is a diagram showing a guide portion according to a second modification of the present embodiment;

[0022] Fig.15 Other embodiments involve Fig.12 Quite a picture. DETAILED DESCRIPTION

[0023] The applicant of the present application disclosed the structure of a non-aqueous electrolyte secondary battery in the specification of a prior application (Japanese Patent Application No. 2019-174878).

[0024] like Figure 1 , Figure 2 As shown, in the nonaqueous electrolyte secondary battery 20 disclosed in the above specification, the tab group 40 of the electrode body 3 housed in the square outer body 1 and the electrode terminal 8 provided on the sealing plate 2 are electrically connected to each other via the first current collector 61 and the second current collector 62 .

[0025] The first current collector 61 is arranged between the electrode body 3 and the sealing plate 2, and is connected to the electrode terminal 8. The second current collector 62 is arranged between the electrode body 3 and the side wall 1b of the square outer body 1, and is composed of a flat plate having a surface parallel to the side wall 1b, and is connected to the first current collector 61.

[0026] like Figure 3 As shown, the tab group 40 extends from the electrode body 3 toward the side wall 1b, and the tab group 40 is connected to the second current collector 62. Figure 4 As shown, the tab group 40 is bent parallel to the side wall 1 b on the side of the connection portion 63 connected to the second current collector 62 .

[0027] According to this structure, the tab group 40 can be bent without bending the second current collector 62. In this way, a non-aqueous electrolyte secondary battery having a high volume energy density can be manufactured by a simple method.

[0028] However, in the above structure, since the bent tab group 40 tries to return to straightness, the second current collector 62 connected to the tab group 40 receives a reaction force from the tab group 40. Therefore, when the second current collector 62 is positioned on the first current collector 61 and the two are joined, there is a problem that the positioning cannot be done accurately.

[0029] In particular, Figure 5 As shown, in the case of including a plurality of electrode bodies 3, the second current collector 62 is connected to the tab group 40 of each electrode body 3, but since the bending method of each tab group 40 is different, the reaction force received by each second current collector 62 is also different. Therefore, when each second current collector 62 is positioned on the first current collector 61 and the two are connected, the position or posture of each second current collector 62 relative to the first current collector 61 will be deviated. As a result, the bonding of each second current collector 62 to the first current collector 61 cannot be stably performed, resulting in problems such as poor conduction and insufficient bonding strength.

[0030] The inventors of the present application believed that the above-mentioned problem could be solved by providing a guide portion for positioning the second current collector 62 on the first current collector 61 , and thus came up with the present invention.

[0031] The following is a detailed description of the embodiments of the present disclosure based on the accompanying drawings. The following description of the preferred embodiments is merely an example in nature and is not intended to limit the present disclosure, its application objects or its use. It should be noted that the basic structure of the non-aqueous electrolyte secondary battery in this embodiment is the same as that of the prior application, so the description used in the prior application is directly used. Figure 1 , Figure 3 , Figure 4 .

[0032] Figure 1 It is a perspective view showing a nonaqueous electrolyte secondary battery 20 according to an embodiment of the present disclosure. Figure 6 2 is a cross-sectional view showing the internal structure of the non-aqueous electrolyte secondary battery 20. Figure 6 Except for the guides 91 and 92 described later, the rest are the same as Figure 2 Same. Figure 1 , Figure 6 As shown, the nonaqueous electrolyte secondary battery 20 includes a battery case 100 composed of a square outer casing 1 having a bottom and a square tube shape with an opening and a sealing plate 2 that seals the opening of the square outer casing 1 .

[0033] The square outer body 1 has a bottom 1a, a pair of first side walls 1b, 1c and a pair of second side walls 1d, 1e. The pair of first side walls 1b, 1c are arranged to be opposite to each other. The pair of second side walls 1d, 1e are arranged to be opposite to each other. The pair of first side walls 1b, 1c are perpendicular to the length direction of the sealing plate 2, and the area of ​​the pair of first side walls 1b, 1c is smaller than the area of ​​the pair of second side walls 1d, 1e.

[0034] The electrode body 3 including the positive electrode plate 4 and the negative electrode plate 5 is contained in the square outer body 1 together with the electrolyte. In the present embodiment, the electrode body 3 is a flat electrode body formed by winding the positive electrode plate 4 and the negative electrode plate 5 in a manner such that a separator is sandwiched between the positive electrode plate 4 and the negative electrode plate 5. The winding axis of the electrode body 3 is perpendicular to the first side walls 1b, 1c and extends parallel to the second side walls 1d, 1e. It should be noted that the electrode body 3 is not limited to a wound electrode body, and for example, it may also be a stacked electrode body formed by stacking the positive electrode plate 4 and the negative electrode plate 5 in a manner such that a separator is sandwiched between the positive electrode plate 4 and the negative electrode plate 5.

[0035] It should be noted that in Figure 6 In the figure, reference numeral 14 denotes a box-shaped or bag-shaped insulating sheet arranged inside the square outer body 1 and accommodating the electrode body 3. Reference numeral 15 denotes an electrolyte injection hole provided on the sealing plate 2. Reference numeral 16 denotes a sealing member for sealing the electrolyte injection hole 15. Reference numeral 17 denotes an exhaust valve provided on the sealing plate 2.

[0036] In the nonaqueous electrolyte secondary battery 20, one side in the direction in which the winding axis of the electrode body 3 extends is the positive electrode side, and the other side is the negative electrode side. Hereinafter, the positive electrode side will be mainly described, and the description of the negative electrode side may be omitted.

[0037] The positive electrode tab group 40 is provided at one end of the electrode body 3 in the direction in which the winding axis extends. Specifically, the positive electrode tab group 40 extends from one end of the electrode body 3 toward the side wall 1b. The positive electrode tab group 40 is formed by stacking a plurality of positive electrode tabs.

[0038] Figure 7 The vicinity of the sealing plate 2 is shown. Figure 8 2 shows the components near the sealing plate 2 in an exploded manner. A positive terminal 8 as an electrode terminal is provided on the outside of the sealing plate 2. The positive terminal 8 is composed of a main body 8a and a rivet 8b. The rivet 8b is detachably mounted on the main body 8a, and the rivet 8b extends from the main body 8a to the sealing plate 2 side. An external insulating component 10 is arranged between the sealing plate 2 and the main body 8a of the positive terminal 8.

[0039] A first positive current collector 61 of the positive current collector 6 is provided on the inner side of the sealing plate 2. The cross section of the first positive current collector 61 is substantially L-shaped, and the first positive current collector 61 is arranged between the electrode body 3 and the sealing plate 2. Specifically, the first positive current collector 61 has a first region 61a arranged along the sealing plate 2 and a second region 61b bent from the end of the first region 61a. The second region 61b extends along the first side wall 1b toward the bottom 1a side.

[0040] An inner insulating member 11 is disposed between the sealing plate 2 and the first region 61a of the first positive electrode current collector 61. The cross section of the inner insulating member 11 is substantially L-shaped corresponding to the cross section of the first positive electrode current collector 61. Specifically, the inner insulating member 11 includes a main body 11a covering the first region 61a of the first positive electrode current collector 61 and a guide portion 91 bent from an end of the main body 11a.

[0041] The guide portion 91 extends from the end of the main body portion 11a of the inner insulating member 11 along the first side wall 1b toward the bottom portion 1a. Details of the guide portion 91 will be described later.

[0042] A gasket 18 is provided between the head of the rivet portion 8 b and the sealing plate 2 .

[0043] Through holes are concentrically provided on the external insulating member 10, the gasket 18, the sealing plate 2, the internal insulating member 11, and the first positive electrode collector 61. When the rivet portion 8b of the positive terminal 8 is mounted on the main body 8a, the rivet portion 8b is inserted into the through hole from the outside. Then, the rivet portion 8b of the positive terminal 8 is riveted to the first positive electrode collector 61. In this way, the first positive electrode collector 61 is connected to the positive terminal 8.

[0044] The second positive current collector 62 of the positive current collector 6 is arranged between the electrode body 3 and the first side wall 1b of the square outer casing 1. Specifically, the second positive current collector 62 is composed of a flat plate having a surface parallel to the first side wall 1b, and the second positive current collector 62 extends along the first side wall 1b toward the bottom 1a side. The second positive current collector 62 is connected to the first positive current collector 61.

[0045] Fig. 9 The second positive electrode current collector 62 is shown. The second positive electrode current collector 62 has a current collector connection portion 62a, an inclined portion 62b, and a tab connection portion 62c. The current collector connection portion 62a is connected to the first positive electrode current collector 61. The positive electrode tab group 40 is connected to the tab connection portion 62c. The inclined portion 62b connects the current collector connection portion 62a and the tab connection portion 62c, and the inclined portion 62b is inclined relative to the two. A recess 62d is provided on the current collector connection portion 62a. The current collector connection portion 62a is joined to the first positive electrode current collector 61 at the recess 62d.

[0046] The second positive electrode current collector 62 is provided with a fuse part 66. The cross-sectional area of ​​the fuse part 66 is smaller than the cross-sectional area of ​​other parts of the plate, and therefore, it will be melted when an overcurrent flows through the second positive electrode current collector 62. Here, the cross-sectional area refers to the area of ​​the cross section parallel to the width direction of the plate.

[0047] A pair of recessed portions 62f recessed inward in the width direction are provided at both ends in the width direction of the second positive electrode current collector (flat plate) 62. The recessed portions 62f reduce the cross-sectional area, thereby forming a fuse portion 66.

[0048] Next, the bending of the positive electrode tab group 40 and the connection between the positive electrode tab group 40 and the second positive electrode current collector 62 will be described. Figure 3 The vicinity of the connection portion between the second positive electrode current collector 62 and the positive electrode tab group 40 is shown before the positive electrode tab group 40 is bent.

[0049] The positive electrode tab group 40 is connected to the tab connection portion 62c in the second positive electrode current collector 62. Specifically, Figure 3As shown, before the positive electrode tab group 40 is bent, the positive electrode tab group 40 is arranged on the tab connection portion 62 c of the second positive electrode current collector 62 , and the tab connection portion 62 c is joined (welded) to the positive electrode tab group 40 , thereby forming a connection portion 63 .

[0050] Here, if Figure 3 As shown, the positive electrode tab group 40 is close to one side in the width direction of the flat plate ( Figure 3 The connection portion 63 between the positive electrode tab group 40 and the tab connection portion 62c is close to the base side of the positive electrode tab group 40 in the width direction of the flat plate (one side in the width direction, Figure 3 In this way, when the positive electrode tab group 40 is bent, the positive electrode tab group 40 can be more reliably and stably formed into a curved shape near the base.

[0051] It should be noted that the positive electrode tab group 40 may also be connected to the tab connection portion 62 c of the second positive electrode current collector 62 at the center in the width direction of the flat plate.

[0052] Figure 4 FIG. 4 shows the vicinity of the connection between the second positive electrode current collector 62 and the positive electrode tab group 40 after the positive electrode tab group 40 is bent. The positive electrode tab group 40 is bent so as to be arranged substantially parallel to the first main surface 3a and the second main surface 3b of the electrode body 3 (see FIG. 4 ). Figure 3 ) is oriented in a direction substantially perpendicular to the winding axis of the electrode body 3. That is, the positive electrode tab group 40 is bent parallel to the first side wall 1b on the side of the connection portion 63 connected to the second positive electrode collector 62. The positive electrode tab group 40 in the bent state is fixed to the electrode body 3 by the tape 80.

[0053] like Fig.10 As shown, the nonaqueous electrolyte secondary battery 20 includes a plurality of electrode bodies 3. A second positive electrode collector 62 is connected to each positive electrode tab group 40 of each electrode body 3. The plurality of electrode bodies 3 are arranged and fixed together with tape to form an electrode body group 300. The second positive electrode collector 62 provided on each electrode body 3 is connected to a first positive electrode collector 61 provided on the sealing plate 2.

[0054] Fig.11 , Fig.12 2 is a diagram showing a method of connecting the second positive electrode current collector 62 to the first positive electrode current collector 61. Fig.11 The state before the positive electrode tab group 40 is bent is shown. Fig.12 The state after the positive electrode tab group 40 is bent is shown.

[0055] like Fig.11As shown, the sealing plate 2 is arranged such that before the positive electrode tab group 40 is bent, each second positive electrode collector 62 faces the first positive electrode collector 61. Fig.12 As shown, each positive electrode tab group 40 is bent so that each second positive electrode current collector 62 faces the first positive electrode current collector 61 .

[0056] At this time, each second positive electrode current collector 62 is positioned on the first positive electrode current collector 61 by the guide portion 91. It should be noted that "positioning" includes not only stopping the second positive electrode current collector 62 at a target position but also maintaining a target posture.

[0057] Next, the guide portion 91 will be described in detail. As described above, the guide portion 91 extends from the end of the main body portion 11a of the inner insulating member 11 along the first side wall 1b toward the bottom 1a side. Specifically, the guide portion 91 has a pair of extension portions 91a. The pair of extension portions 91a extend along the two ends in the width direction of the second positive electrode collector 62, respectively. The second positive electrode collector 62 is positioned on the first positive electrode collector 61 by the pair of extension portions 91a.

[0058] A pair of convex portions 91 b are provided on the inner side of the pair of extension portions 91 a in the width direction. The pair of convex portions 91 b protrude inward in the width direction and engage with the pair of concave portions 62 f in each second positive electrode current collector 62 .

[0059] It should be noted that, in this embodiment, Fig.12 As shown, the guide portion 91 has three extension portions 91a. The central extension portion 91a extends along one end portion of each of the second positive electrode current collectors 62 on both sides in the width direction, and is also used to position the second positive electrode current collectors 62 on both sides.

[0060] The guide portion 91 is made of an insulating material and is preferably formed integrally with the inner insulating member 11 .

[0061] According to this structure, each second positive electrode current collector 62 is positioned on the first positive electrode current collector 61 by the guide portion 91 , so that the two can be easily connected.

[0062] In particular, when a plurality of electrode bodies 3 are included as in the present embodiment, the positions and postures of the second positive electrode collectors 62 relative to the first positive electrode collectors 61 can be made consistent with each other. In this way, it is possible to suppress the deviation of the positions and postures of the second positive electrode collectors 62 relative to the first positive electrode collectors 61 caused by the difference in the reaction force received by the second positive electrode collectors 62 from the positive electrode tab groups 40. Therefore, the second positive electrode collectors 62 can be stably joined to the first positive electrode collectors 61, and the occurrence of poor conduction, insufficient joining strength, etc. can be suppressed.

[0063] As described above, it is possible to provide a nonaqueous electrolyte secondary battery having a high volume energy density and an easily assembled structure.

[0064] The pair of extending portions 91 a abuts against both end portions of the second positive electrode current collector 62 in the width direction, thereby making it possible to more reliably position the second positive electrode current collector 62 in the width direction.

[0065] The pair of protrusions 91b in the pair of extensions 91a engage with the pair of recesses 62f in the second positive electrode current collector 62, thereby enabling the second positive electrode current collector 62 to be more reliably extended in the length direction ( Fig.12 Positioning in the up and down directions).

[0066] By forming the guide portion 91 integrally with the inner insulating member 11 , it is possible to reduce the number of steps required for assembly.

[0067] Fig.13 The guide portion 91 according to the first modification of the present embodiment is shown. In the present modification, a stopper 91c is provided on each of the pair of protrusions 91b. The stopper 91c restricts the movement of the second positive electrode current collector 62 in the thickness direction. With this structure, the second positive electrode current collector 62 is difficult to separate from the first positive electrode current collector 61.

[0068] Fig.14 The guide portion 91 according to the second modification of the present embodiment is shown. In this modification, the guide portion 91 has a connecting portion 91d. The connecting portion 91d connects the front end portions of the pair of extension portions 91a to each other. According to this structure, the guide portion 91 is reinforced by the connecting portion 91d, and the strength of the guide portion 91 is improved.

[0069] The negative electrode side also has the same structure as the positive electrode side. Figure 6 , symbol 9 denotes a negative terminal, symbol 50 denotes a negative electrode tab group, symbol 7 denotes a negative electrode collector, symbol 71 denotes a first negative electrode collector, symbol 72 denotes a second negative electrode collector, symbol 12 denotes an external insulating component, symbol 13 denotes an internal insulating component, and symbol 92 denotes a guide portion.

[0070] As mentioned above, although the present invention was described based on the preferred embodiment, the above description is not limitative, and various changes can be made, of course.

[0071] The nonaqueous electrolyte secondary battery 20 according to the above embodiment includes a plurality of electrode bodies 3 to form an electrode body group 300, but the present invention is not limited thereto. Fig.15 As shown, the nonaqueous electrolyte secondary battery 20 may be configured to include only one electrode body 3 .

[0072] In the above embodiment, the guide portion 91 is formed integrally with the inner insulating member 11 , but the present invention is not limited thereto. For example, the guide portion 91 may be mounted on the inner insulating member 11 by bolts, nuts, or the like.

[0073] The material of the lead portions 91 and 92 is not limited to insulating materials. The material of the positive electrode side lead portion 91 may be, for example, aluminum or an aluminum alloy. The material of the negative electrode side lead portion 92 may be, for example, copper or a copper alloy.

[0074] The guide portion 91 does not need to be directly provided on the inner insulating member 11. In other words, the guide portion 91 may be indirectly provided on the inner insulating member 11. For example, the guide portion 91 may be provided on a protective cover connected to the inner side of the inner insulating member 11 and covering the first current collector 61 from the inner side.

[0075] In this embodiment, the fuse part 66 is formed by reducing the cross-sectional area by using a pair of recesses 62f, but the present invention is not limited thereto. The fuse part 66 may also be formed by providing a slit along the width direction of the plate as in the prior application (see Figure 5 ). In this case, the provision of the pair of recesses 62f has nothing to do with the function of the fuse unit 66. The fuse unit 66 may also be provided on the first current collector 61 instead of on the second current collector 62. In this case, the fuse unit 66 is not provided on the second current collector 62, but a pair of recesses 62f is provided. It should be noted that the pair of recesses 62f in the second current collector 62 and the pair of protrusions 91b in the pair of extensions 91a of the guide portion 91 do not necessarily have to be provided.

[0076] Description of Reference Numerals

[0077] 1 Square outer body

[0078] 1b First side wall (side wall)

[0079] 2 Sealing plate

[0080] 3 Electrode body

[0081] 4 Positive plate

[0082] 5 Negative plate

[0083] 8 Positive terminal (electrode terminal)

[0084] 11 Insulating member on the inner side (insulating member)

[0085] 20 Non-aqueous electrolyte secondary battery

[0086] 40 positive pole tab group (tab group)

[0087] 61 first positive electrode current collector (first current collector)

[0088] 62 second positive electrode current collector (second current collector)

[0089] 62f A pair of recesses

[0090] 63 Connection

[0091] 91 Guidance Department

[0092] 91a A pair of extensions

[0093] 91b A pair of protrusions

[0094] 91c Stopper

[0095] 91d Connection

Claims

1. A non-aqueous electrolyte secondary battery, characterized in that: The non-aqueous electrolyte secondary battery comprises an electrode body, a square outer body, a sealing plate, an electrode terminal, a first current collector, an insulating member, a second current collector and a tab assembly. The electrode body comprises a positive electrode plate and a negative electrode plate, The square outer casing has an opening and accommodates the electrode body. The sealing plate closes the opening, The electrode terminal is arranged on the sealing plate, The first current collector is arranged between the electrode body and the sealing plate and connected to the electrode terminal. The insulating member is arranged between the sealing plate and the first current collector, The second current collector is arranged between the electrode body and the side wall of the square outer package and is connected to the first current collector. The tab group extends from the electrode body toward the side wall and is connected to the second current collector. The second current collector is composed of a flat plate having a surface parallel to the side wall. The tab group is connected to the second current collector and is bent parallel to the side wall at the connection portion connected to the second current collector. The second current collector is positioned on the first current collector by a guide portion extending from the insulating member, The guide portion includes a pair of extension portions extending along both ends of the second current collector in the width direction, respectively. The second current collector is positioned on the first current collector by the pair of extensions, A pair of recessed portions recessed inward in the width direction are provided at both ends of the second current collector in the width direction. A pair of convex portions are provided on the inner sides of the pair of extending portions in the width direction, and the pair of convex portions protrude inward in the width direction and engage with the pair of concave portions.

2. The non-aqueous electrolyte secondary battery according to claim 1, characterized in that: The pair of convex portions are respectively provided with stoppers for restricting movement of the second current collector.

3. The non-aqueous electrolyte secondary battery according to claim 1, characterized in that: The guide portion includes a connecting portion that connects the front end portions of the pair of extending portions to each other.

4. The non-aqueous electrolyte secondary battery according to claim 1, characterized in that: The guide portion is made of an insulating material and is formed integrally with the insulating component.

5. The non-aqueous electrolyte secondary battery according to claim 1, characterized in that: The nonaqueous electrolyte secondary battery includes a plurality of the electrode bodies. The second current collector is connected to the tab group of each electrode body, Each of the second current collectors is positioned on the first current collector through the guide portion.

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