Metal-resin bonded body and method for producing metal-resin bonded body

Abstract

The present disclosure relates to a metal-resin bonded body in which a resin member and a metal member are bonded and fixed, and a method for manufacturing the metal-resin bonded body. This metal-resin bonded body is provided with: a metal member having a ring-shaped resin bonded portion on a metal surface; and a resin member joined around the entire circumference in the circumferential direction and fixed to the resin joining portion. The resin bonding portion has a ring-shaped recess arrangement portion in which a plurality of bowl-shaped recesses partially overlap and are arranged side by side, and the recess arrangement portion includes a ring-shaped nano-roughened portion in which high nano-columns stand, and a non-nano-roughened portion. The resin member is bonded to the nano-roughened portion around the entire circumference by filling a resin material between the high nano-pillars standing in the nano-roughened portion.

Description

Technical Field

[0001] The present disclosure relates to a metal-resin joint body in which a resin component and a metal component are joined and fixed, and a method for manufacturing the metal-resin joint body. Background Art

[0002] As a metal-resin joint body in which a resin part is joined and fixed to a metal part, the following metal-resin joint body is known, which comprises: a metal part having a ring-shaped (band-shaped and ring-shaped) resin joint part on the metal surface; and a resin part, which is joined and fixed to the metal part with the resin joint part around the entire circumference thereof. Such a metal-resin joint body is included in, for example, a storage device such as a battery. Specifically, there is a battery in which positive and negative terminal parts are respectively fixed to a rectangular plate-shaped outer shell cover part constituting a cubic box-shaped outer shell via a resin part. The terminal part is inserted into a through hole provided in the outer shell cover part, extending from the inside to the outside of the outer shell, and the resin part insulates the outer shell cover part from the terminal part, and is airtightly joined to each part, and the terminal part is fixed to the outer shell cover part. In such a battery, the terminal part (metal part) and the resin part joined and fixed thereto are equivalent to the above-mentioned "metal-resin joint body". In addition, the outer shell cover part (metal part) and the resin part joined and fixed thereto are also equivalent to the "metal-resin joint body". In addition, the above-mentioned battery is disclosed in, for example, Patent Document 1.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2022-079172

[0004] In addition, as a method for roughening the surface of the resin joint of the metal component, it is conceivable to intermittently irradiate the resin joint of the metal component with a pulse laser while staggering the irradiation position to roughen the resin joint at the nanometer level. That is, in the resin joint, a plurality of bowl-shaped recesses that are recessed into a bowl shape are formed by irradiation with a pulse laser to form a recess configuration portion, and on the surface of the bowl-shaped recess, particles from the metal forming the metal component are combined into a beaded shape to form a columnar nano-scale nano-column forest. It can be considered that by forming a recess configuration portion in the resin joint of the metal component in this way, the metal component and the resin component can be firmly and airtightly joined.

[0005] However, the inventors have found that even if a recess configuration portion is formed in the resin joint portion as described above, the above-mentioned nanocolumns and nanocolumns of appropriate size (height) may not be formed on the surface of the bowl-shaped recess, depending on the order and position of the irradiated pulse laser (the order and arrangement of the formation of the bowl-shaped recess). That is, the following situation was found, namely, in the recess configuration portion, in addition to the nano-roughened portion with nanocolumns of appropriate height, there is also a non-nano-roughened portion with no nanocolumns or with relatively low nanocolumns. Specifically, the following situation was found, namely, if a plurality of bowl-shaped recesses are connected in a row by scanning a pulse laser to form a recess configuration portion by arranging a plurality of continuous recessed areas in a row, the last formed continuous recessed area in particular will become a non-nano-roughened portion with no nanocolumns or with relatively low nanocolumns.

[0006] Furthermore, in the non-nano roughened portion, the resin component cannot be firmly and airtightly bonded to the metal component, and therefore, it is also found that the sealing between the metal component and the resin component is insufficient due to the configuration pattern of the non-nano roughened portion. For example, in the above-mentioned battery, there is a risk that moisture outside the battery penetrates into the battery through the gap between the terminal component and the resin component or between the outer shell cover component and the resin component, and the electrolyte contained in the battery leaks to the outside of the battery through the gap between the terminal component and the resin component or between the outer shell cover component and the resin component. Summary of the invention

[0007] The present disclosure has been made in view of the current situation, and provides a metal-resin bonded body in which a resin component and a metal component are bonded and fixed, in which the sealing property between the metal component and the resin component can be improved, and a method for manufacturing the metal-resin bonded body.

[0008] (1) One method of the present disclosure for solving the above-mentioned problems is a metal-resin joint, which comprises: a metal component having a ring-shaped resin joint portion on a metal surface; and a resin component, which is joined to the resin joint portion and fixed to the metal component around the entire circumference of the resin joint portion, wherein the resin joint portion of the metal component has a recessed portion configuration portion, which is a ring-shaped portion around the entire circumference of the circumference, and is formed by overlapping and arranging a plurality of bowl-shaped recessed portions with a diameter of 30 to 300 μm, and the recessed portion configuration portion includes: a nano-roughened portion, which is a ring-shaped portion around the entire circumference of the circumference, It is composed of a forest of high nanocolumns with a height of more than 40nm, wherein the nanocolumns are columnar and are formed by combining particles with a diameter of less than 100nm from the metal forming the above-mentioned metal part into a beaded shape; and in the non-nano-roughened part, the above-mentioned nanocolumns do not exist, or the height of the above-mentioned nanocolumns standing in the above-mentioned nano-roughened part is low nanocolumns less than 40nm, and the above-mentioned resin part is constructed as follows: the resin material forming the above-mentioned resin part is filled in the spaces between the above-mentioned high nanocolumns standing in the above-mentioned nano-roughened part, and is joined to the above-mentioned nano-roughened part around the entire circumference, so as to airtightly seal between the above-mentioned metal part and the above-mentioned resin part, and between one side and the other side of the width direction of the above-mentioned nano-roughened part.

[0009] In the above-mentioned metal-resin joint, an annular (band-shaped and annular) recess configuration part in which a plurality of bowl-shaped recesses are configured is provided in an annular resin joint part in the metal surface of the metal part. Although the recess configuration part includes a non-nanoroughened part where there are no nanocolumns or low nanocolumns are forested (not properly nano-roughened at the nano level), the area including high nanocolumns forested (properly nano-roughened at the nano level) becomes an annular nano-roughened part. Moreover, the resin part fills the resin material between the high nanocolumns forested in the nano-roughened part, and is bonded to the nano-roughened part around the entire circumference, so as to airtightly seal the one side and the other side of the nano-roughened part in the width direction between the metal part and the resin part. Therefore, in the above-mentioned metal-resin joint, although there is a non-nanoroughened part that is not properly nano-roughened in the recess configuration part, the sealing performance of the metal part and the resin part can be improved.

[0010] In addition, regarding the “recessed portion arrangement portion”, a region that is part of the resin bonding portion may be the recessed portion arrangement portion, or the entire region of the resin bonding portion may be the recessed portion arrangement portion.

[0011] The “ring-shaped nano-roughened portion” preferably has a dimension in the width direction of at least 150 μm. This allows the nano-roughened portion to be more effectively airtightly sealed between one side and the other side in the width direction.

[0012] The "metal member" preferably contains any one of aluminum, copper, iron, tin, titanium, zinc, chromium and nickel as a main component. Thus, a recess arrangement portion in which a plurality of bowl-shaped recesses are arranged can be easily provided in the resin-joined portion of the metal member.

[0013] (2) It can also be constructed as follows: based on the metal-resin joint body described in (1), the above-mentioned metal component is a rod-shaped component having an outer peripheral surface on the above-mentioned metal surface, and has the above-mentioned recessed portion configuration portion, the recessed portion configuration portion includes the above-mentioned nano-roughened portion with an annular shape surrounding the above-mentioned outer peripheral surface, and the above-mentioned resin component is an annular component surrounding the above-mentioned outer peripheral surface of the above-mentioned metal component, and is bonded to the above-mentioned nano-roughened portion with an annular shape around the entire circumference.

[0014] In the above-mentioned metal-resin joint, the metal part is in the shape of a rod, and the resin part is in the shape of a ring surrounding the outer peripheral surface of the metal part. In addition, a recessed portion configuration portion including a ring-shaped nano-roughened portion surrounding the outer peripheral surface is provided on the metal part, and the resin part and the ring-shaped nano-roughened portion are joined around the entire circumference. Therefore, the outer peripheral surface of the metal part and the resin part can be airtightly separated into one side and the other side in the width direction of the nano-roughened portion, that is, one side and the other side in the axial direction of the metal part, with the ring-shaped nano-roughened portion as a boundary.

[0015] (3) It can also be constructed as follows: based on the metal-resin joint body described in (1), the above-mentioned metal component is in the form of a through hole, the above-mentioned metal surface has an opening peripheral surface surrounding the opening edge of the above-mentioned through hole, the above-mentioned opening peripheral surface has the above-mentioned recessed portion configuration part, the above-mentioned recessed portion configuration part includes the above-mentioned nano-roughened portion with a ring shape surrounding the above-mentioned opening edge, and the above-mentioned resin component is bonded to the above-mentioned nano-roughened portion with a ring shape surrounding the above-mentioned opening edge around the entire circumference.

[0016] In the above-mentioned metal-resin joint, the metal part is in the form of a through hole. In addition, a recessed configuration portion including a ring-shaped nano-roughened portion surrounding the opening edge is provided on the opening peripheral surface of the metal surface of the metal part, and the resin part is joined to the ring-shaped nano-roughened portion surrounding the opening edge around the entire circumference. Therefore, the opening peripheral surface of the metal part and the resin part can be airtightly separated into one side and the other side in the width direction of the nano-roughened portion, that is, the inner side and the outer side of the opening peripheral surface, with the ring-shaped nano-roughened portion as the boundary.

[0017] (4) Another method is a method for manufacturing a metal-resin joint, wherein the metal-resin joint comprises: a metal component having a ring-shaped resin joint portion on a metal surface; and a resin component that is joined to the resin joint portion and fixed to the metal component around the entire circumference of the resin joint portion, wherein the resin joint portion of the metal component has a recessed portion configuration portion, wherein the recessed portion configuration portion is ring-shaped around the entire circumference, and is formed by overlapping and arranging a plurality of bowl-shaped recessed portions with a diameter of 30 to 300 μm, wherein the recessed portion configuration portion comprises: a nano-roughened portion that is around the entire circumference of the circumference; The ring-shaped band is composed of a forest of high nanocolumns with a height of more than 40nm, wherein the nanocolumns are columnar and are formed by combining particles with a diameter of less than 100nm from the metal forming the above-mentioned metal component into a beaded shape; and in the non-nano-roughened portion, the above-mentioned nanocolumns do not exist, or the above-mentioned nanocolumns that stand in the forest are low nanocolumns with a height of less than 40nm, and the above-mentioned resin component is constructed as follows: the resin material that forms the above-mentioned resin component is filled between the above-mentioned high nanocolumns standing in the above-mentioned nano-roughened portion, and is joined to the above-mentioned nano-roughened portion around the entire circumference, so that the metal component and the resin component, the above-mentioned nano-roughened portion, are connected. The metal-resin joint body is hermetically sealed between one side and the other side in the width direction, wherein the manufacturing method of the metal-resin joint body comprises: a recess forming step, intermittently irradiating the resin joint part of the metal component with a pulse laser while staggering the irradiation position to form a plurality of the bowl-shaped recesses and form the recess configuration part; and a resin forming step, after the recess forming step, forming the resin component joined to the metal component, in which the pulse laser is scanned in the continuous setting direction intersecting with the width direction of the resin joint part to form a plurality of bowl-shaped recesses partially overlapping. In addition, the above-mentioned continuous setting areas of the recesses connected in a row in the above-mentioned continuous setting direction are repeatedly subjected to the above-mentioned action in an arrangement direction orthogonal to the above-mentioned continuous setting direction to form a plurality of rows of the above-mentioned continuous setting areas of the recesses, and the plurality of rows of the above-mentioned continuous setting areas of the recesses are partially overlapped and arranged in the above-mentioned arrangement direction to form the above-mentioned recess configuration part including the above-mentioned nano-roughening part. In the above-mentioned resin forming step, the above-mentioned resin material is filled between the above-mentioned high nano-columns standing in the above-mentioned nano-roughening part, and the above-mentioned resin part is formed which is airtightly bonded to the above-mentioned nano-roughening part around the entire circumference and is bonded to the above-mentioned resin bonding part around the entire circumference.

[0018] In the above-mentioned method for manufacturing a metal-resin joint, in the recess forming step, a pulse laser is scanned to form a plurality of recess continuous arrangement regions in which a plurality of bowl-shaped recesses are arranged in a row in the continuous arrangement direction in the arrangement direction, thereby forming a recess arrangement portion including a nano-roughened portion, so that the nano-roughened portion can be easily formed. In addition, in the resin forming step, a resin component is formed while a resin material is filled between high nano-pillars standing in the nano-roughened portion, so that a resin component airtightly joined to the nano-roughened portion around the entire circumference can be easily formed.

[0019] In addition, as a method of forming a resin part in the "resin forming process", for example, there can be cited a method of forming (molding) a resin part by insert molding using a metal part, a method of forming a resin part by applying a liquid resin material to a resin joint of a metal part and drying it, etc.

[0020] (5) Preferably: based on the manufacturing method of the metal-resin joint body described in (4), in the above-mentioned recess forming step, the above-mentioned recess continuous setting area is formed into a multi-stage ring shape, or a multiple spiral shape or a vortex shape to form the above-mentioned recess configuration part including the above-mentioned nano-roughened part.

[0021] In the above-mentioned method for manufacturing a metal-resin joint, in the recess forming step, the recess continuously setting area is formed into a multi-stage ring shape, or a multiple spiral shape or a vortex shape to form a recess configuration portion including a nano-roughened portion, thereby making it possible to easily form a ring-shaped nano-roughened portion in the resin joint of the metal part. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a perspective view of a battery including a first metal-resin joint and a second metal-resin joint according to the embodiment.

[0023] Figure 2 It is a partially cutaway cross-sectional view of a battery including a first metal-resin joint and a second metal-resin joint according to the embodiment, taken along the battery height direction and the battery width direction.

[0024] Figure 3 It is a partial enlarged cross-sectional view along the battery height direction and the battery thickness direction of the vicinity of a resin member in a battery having a first metal-resin joint and a second metal-resin joint according to an embodiment.

[0025] Figure 4 The resin bonding portion ( Figure 3 A partial enlarged top view of parts A and B in the figure.

[0026] Figure 5This is a partially enlarged cross-sectional view of a nano-roughened portion according to an embodiment.

[0027] Figure 6 It is a partially enlarged cross-sectional view showing high nanocolumns standing in a bowl-shaped recess in a nano-roughened portion according to an embodiment.

[0028] Figure 7 This is a partially enlarged cross-sectional view of a non-nano-roughened portion according to an embodiment.

[0029] Figure 8 It is a partially enlarged cross-sectional view showing low nano columns arranged in a bowl-shaped recess in a non-nano roughened portion according to an embodiment.

[0030] Fig. 9 It is a flowchart of a method for manufacturing a battery including a method for manufacturing a metal-resin joint according to an embodiment.

[0031] Fig.10 This is an explanatory diagram of the method for manufacturing a metal-resin joint according to the embodiment, showing a state in which a plurality of bowl-shaped recesses are formed by scanning a pulsed laser in a first recess forming step (a second recess forming step).

[0032] Fig.11A It is an explanatory diagram of a resin forming step of a method for manufacturing a metal-resin joint according to an embodiment, and is an explanatory diagram showing a state in which positive and negative terminal members are respectively inserted into through holes of a case cover member.

[0033] Fig. 11B It is an explanatory diagram of a resin forming step in the method for producing a metal-resin joint according to the embodiment, and is an explanatory diagram showing a state in which a pair of resin members are molded separately.

[0034] Description of Reference Numerals

[0035] 1…battery (electrical storage device); 10…housing; 30…housing cover member (metal member); 30h…through hole; 30he…opening edge (of the through hole); 30m…metal surface (of the housing cover member); 30me…surrounding surface of the opening (of the metal surface); 31…resin joint (of the metal surface of the housing cover member); 33…recessed portion (of the resin joint of the housing cover member); 35…nano-roughened portion (of the recessed portion of the housing cover member); 36…non-nano-roughened portion (of the recessed portion of the housing cover member); 37…bowl-shaped recess (of the housing cover member); 38 …nanopillars (of the housing cover member); 38H…high nanopillars (of the housing cover member); 38L…low nanopillars (of the housing cover member); 38p…particles (from the housing cover member); 39…concave continuous setting region (of the housing cover member); 40…electrode body; 50…terminal member (metal member); 50m…metal surface (of the terminal member); 50mc…peripheral surface (of the metal surface); 51…resin bonding portion (of the metal surface of the terminal member); 53…concave configuration portion (of the resin bonding portion of the terminal member); 55…nano-roughening (of the concave configuration portion of the terminal member) 56…non-nano roughened portion (of the recessed portion of the terminal member); 57…bowl-shaped recessed portion (of the terminal member); 58…nano pillar (of the terminal member); 58H…high nano pillar (of the terminal member); 58L…low nano pillar (of the terminal member); 58p…particles (from the terminal member); 59…concave continuous setting region (of the terminal member); 70…resin member; 75…resin material; 100…first metal-resin joint (composed of the terminal member and the resin member); 200…second metal-resin joint (composed of the housing cover member and the resin member); IAH, IBH…circumferential direction (of the resin bonding part); LAH, LBH…width direction (of the nano-roughened part); LAH1, LBH1…one side (of the width direction); LAH2, LBH2…the other side (of the width direction); MAH, MBH…continuous setting direction; NAH, NBH…arrangement direction; ha…height (of the nanocolumn); Da…diameter (of the particle); Db…diameter (of the bowl-shaped recess); LC…pulsed laser; S1…metal-resin bonding body manufacturing process; S11…first recess forming process; S12…second recess forming process; S13…resin forming process. DETAILED DESCRIPTION

[0036] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 2 is a perspective view of a battery (electricity storage device) 1 including a first metal-resin joint 100 and a second metal-resin joint 200 according to the present embodiment. Figure 2 A partially cutaway cross-sectional view of the battery 1 is shown in FIG. Figure 3FIG. 2 shows a partial enlarged cross-sectional view of the vicinity of the resin member 70 in the battery 1. In addition, the battery height direction AH, the battery width direction BH, and the battery thickness direction CH of the battery 1 are defined as follows: Figure 1 to Figure 3 The directions shown are used for illustration.

[0037] The battery 1 is a square (rectangular) and sealed lithium-ion secondary battery mounted on hybrid vehicles, plug-in hybrid vehicles, electric vehicles and the like. The battery 1 includes: a housing 10 composed of a housing body component 20 and a housing cover component 30, an electrode body 40 contained in the housing 10, and positive and negative terminal components 50 respectively fixed to the housing 10 via a resin component 70. The electrode body 40 is covered by a bag-shaped insulating retainer 7 composed of an insulating film in the housing 10. In addition, an electrolyte 5 is contained in the housing 10, a part of which is immersed in the electrode body 40, and the remaining part is accumulated on the bottom wall of the housing 10.

[0038] The battery 1 includes two first metal-resin junctions 100 and two second metal-resin junctions 200. Specifically, the positive and negative terminal components (metal components) 50 and the resin components 70 joined and fixed thereto are respectively the first metal-resin junctions 100 (hereinafter, also referred to as "metal-resin junctions 100"). In addition, the outer shell cover component (metal component) 30 and the positive and negative resin components 70 joined and fixed thereto are respectively the second metal-resin junctions 200 (hereinafter, also referred to as "metal-resin junctions 200").

[0039] The housing 10 is a cubic box made of metal (in this embodiment, aluminum), and is a square tube with a bottom having a rectangular opening 20c. It is composed of a housing main body 20 that accommodates the electrode body 40 inside, and a rectangular plate-shaped housing cover member 30 that blocks the opening 20c of the housing main body 20. The opening 20c of the housing main body 20 and the peripheral portion 30f of the housing cover member 30 are welded airtightly around the entire circumference. The housing cover member 30 is provided with a safety valve 11 that ruptures and opens the valve when the internal pressure of the housing 10 exceeds the valve opening pressure. In addition, the housing cover member 30 is provided with a liquid injection hole 30k, and the liquid injection hole 30k is airtightly sealed by a circular plate-shaped sealing member 12 made of aluminum.

[0040] The electrode body 40 is a rectangular parallelepiped and is a laminated type, and a plurality of rectangular positive plates 41 and a plurality of rectangular negative plates 42 are alternately laminated in the battery thickness direction CH via a rectangular separator 43 composed of a porous film made of resin. On one side BH1 of the battery width direction BH in the electrode body 40, the collector foils of each positive electrode plate 41 overlap in the battery thickness direction CH to form a positive electrode collector 40c. The positive electrode collector 40c is connected to the terminal member 50 of the positive electrode described later. In addition, on the other side BH2 of the battery width direction BH in the electrode body 40, the collector foils of each negative electrode plate 42 overlap in the battery thickness direction CH to form a negative electrode collector 40d. The negative electrode collector 40d is connected to the terminal member 50 of the negative electrode described later.

[0041] A rectangular through hole 30h is provided near the end of one side BH1 and the other side BH2 in the battery width direction BH of the outer shell cover member 30. A positive electrode terminal member 50 made of aluminum is inserted into the through hole 30h of the one side BH1, and the terminal member 50 is fixed to the outer shell cover member 30 in a state of being insulated from the outer shell cover member 30 via the resin member 70. In addition, a negative electrode terminal member 50 made of copper is inserted into the through hole 30h of the other side BH2, and the terminal member 50 is fixed to the outer shell cover member 30 in a state of being insulated from the outer shell cover member 30 via the resin member 70.

[0042] The terminal member 50 is formed by stamping a metal plate (a positive electrode is an aluminum plate, and a negative electrode is a copper plate), and is in the shape of a rod extending in the axial direction EH (in this embodiment, the same direction as the battery height direction AH). The terminal member 50 is composed of a rectangular plate-shaped terminal top plate portion 50a located on one side EH1 in the axial direction EH (the upper side AH1 in the battery height direction AH than the outer shell cover member 30) and extending in the battery width direction BH and the battery thickness direction CH, and a terminal extension protrusion 50b extending from the terminal top plate portion 50a to the other side EH2 in the axial direction EH (the lower side AH2 in the battery height direction AH). The terminal extension protrusion 50b is bent at the end of the terminal top plate portion 50a on one side CH1 in the battery thickness direction CH and extends to the lower side AH2, passes through the through hole 30h of the outer shell cover member 30, and also penetrates the resin member 70 and extends to the lower side AH2. The positive terminal extension protrusion 50b is welded to the positive electrode collector 40c of the electrode body 40 at the front end of the lower side AH2 and is electrically connected to the positive electrode collector 40c. In addition, the negative terminal extension protrusion 50b is welded to the negative electrode collector 40d of the electrode body 40 at the front end of the lower side AH2 and is electrically connected to the negative electrode collector 40d.

[0043] In the metal surface 50m of the terminal member 50, the ring-shaped portion joined to the resin member 70 is the resin joint portion 51, and the portion not joined to the resin member 70 is the non-resin joint portion 52. Specifically, the inner side surface and four side surfaces of the surface of the terminal top plate portion 50a facing the lower side AH2, and the portion of the outer peripheral surface 50mc of the terminal extension protrusion 50b located inside the resin member 70 on the upper side AH1 are the resin joint portion 51. On the other hand, the top surface of the surface of the terminal top plate portion 50a facing the upper side AH1 and the portion of the outer peripheral surface 50mc of the terminal extension protrusion 50b protruding and exposed from the resin member 70 to the lower side AH2 are the non-resin joint portions 52.

[0044] Next, the resin joint portion 51 will be described in detail (see also Figures 4 to 8 ).also, Figure 4 The resin joint portion 51 is shown in an enlarged manner. Figure 3 The A portion surrounded by a dotted line in the figure. The resin joint portion 51 of the terminal member 50 is composed of a recessed portion arrangement portion 53 in which a plurality of bowl-shaped recessed portions 57 are arranged, and a non-recessed portion arrangement portion 54 in which no bowl-shaped recessed portions 57 are arranged. Specifically, in the resin joint portion 51, a rectangular ring-shaped portion that surrounds the outer peripheral surface 50mc and is formed by the central portion of the terminal extension protrusion 50b located inside the resin member 70 in the battery height direction AH is the recessed portion arrangement portion 53. On the other hand, in the resin joint portion 51, a portion formed by the terminal top plate portion 50a and a portion formed by the upper side AH1 and the lower side AH2 of the terminal extension protrusion 50b located inside the resin member 70 are the non-recessed portion arrangement portion 54.

[0045] The recess configuration portion 53 is a rectangular band ring extending in the battery height direction AH around the entire circumference IAH (in this embodiment, the circumference along the battery width direction BH and the battery thickness direction CH) of the resin joint portion 51. In the recess configuration portion 53, a plurality of bowl-shaped recesses 57 having a diameter Db of 30 to 300 μm (in this embodiment, in the positive terminal component 50, the approximate diameter Db = 80 μm, and in the negative terminal component 50, the approximate diameter Db = 75 μm) are partially overlapped and arranged in an array.

[0046] Furthermore, the recessed portion arrangement portion 53 is composed of a nano-roughened portion 55 and a non-nano-roughened portion 56. Specifically, in the rectangular ring-shaped recessed portion arrangement portion 53 extending in the battery height direction AH, the rectangular ring-shaped portion forming the end portion of the lower side AH2 is the non-nano-roughened portion 56, and the rectangular ring-shaped portion forming the portion closer to the upper side AH1 is the nano-roughened portion 55.

[0047] The nano-roughened portion 55 is formed by a forest of high nano-pillars 58H having a height ha of 40 nm or more (in this embodiment, the height ha is approximately 200 nm) formed by combining particles 58p of the metal forming the terminal member 50 in a beaded manner to form a columnar nano-pillar 58 (see Figure 5 and Figure 6 ). The metal of the terminal member 50 forming the positive electrode is aluminum, and the nanocolumn 58 of the positive electrode is formed by particles 58p composed of aluminum and aluminum oxide. In addition, the metal of the terminal member 50 forming the negative electrode is copper, and the nanocolumn 58 of the negative electrode is formed by particles 58p composed of copper and copper oxide. The diameter Da of the particles 58p of the positive and negative electrodes is less than 100nm (in this embodiment, the approximate diameter Da=30nm).

[0048] On the other hand, in the non-nano roughened portion 56, although the above-mentioned nanopillars 58 are numerous, these nanopillars 58 are low nanopillars 58L (see FIG. 5 ) with a height ha of less than 40 nm (in the present embodiment, the height ha = less than 20 nm). Figure 7 and Figure 8 ).

[0049] Next, the resin joint portion 31 of the housing cover member 30 will be described (see Figure 3 to Figure 8 ).also, Figure 4 The resin joint portion 31 is shown in an enlarged manner. Figure 3 The B portion surrounded by a dotted line in the figure. In the metal surface 30m of the outer cover member 30, the annular portions joined to the respective resin members 70 are respectively the resin joint portions 31, and the portions not joined to these resin members 70 are the non-resin joint portions 32. Specifically, the metal surface 30m of the outer cover member 30 includes a pair of rectangular annular opening peripheral surfaces 30me surrounding a pair of opening edges 30he of the positive through-hole 30h, and a pair of rectangular annular opening peripheral surfaces 30me surrounding a pair of opening edges 30he of the negative through-hole 30h. Each through-hole 30h extends in the battery height direction AH, one opening edge 30he and the opening peripheral surface 30me are located on the upper side AH1, and the other opening edge 30he and the opening peripheral surface 30me are located on the lower side AH2. In the metal surface 30m of the outer cover member 30, the inner peripheral surface of the pair of opening peripheral surfaces 30me and the through-hole 30h connecting the respective surfaces is the resin joint portion 31. On the other hand, a portion of the metal surface 30 m of the housing cover member 30 other than the opening peripheral surface 30 me and the inner peripheral surface of the through hole 30 h is a non-resin joint portion 32 .

[0050] The resin joint part 31 of the housing cover member 30 is composed of a recess arrangement part 33 in which a plurality of bowl-shaped recesses 37 are arranged, and a non-recess arrangement part 34 in which no bowl-shaped recesses 37 are arranged. Specifically, in the resin joint part 31, the radial central parts of a pair of opening peripheral surfaces 30me are respectively the recess arrangement parts 33, and the radial inner side FH1 part and the radial outer side FH2 part of the opening peripheral surface 30me and the inner peripheral surface of the through hole 30h are the non-recess arrangement parts 34. Each recess arrangement part 33 is a rectangular band ring extending in the battery width direction BH and the battery thickness direction CH around the entire circumference IBH (in the present embodiment, the circumference along the battery width direction BH and the battery thickness direction CH) of the resin joint part 31. In the recess arrangement part 33, a plurality of bowl-shaped recesses 37 with a diameter Db of 30 to 300 μm (in the present embodiment, the approximate diameter Db = 80 μm) that are recessed in a bowl shape or a pit shape are partially overlapped and arranged in an array.

[0051] Each recessed portion arrangement portion 33 is composed of a nano-roughened portion 35 and a non-nano-roughened portion 36. Specifically, in the recessed portion arrangement portion 33, a rectangular ring-shaped portion forming the peripheral portion of the outer side FH2 is a non-nano-roughened portion 36, and a rectangular ring-shaped portion forming a portion closer to the inner side FH1 is a nano-roughened portion 35.

[0052] The nano-roughened portion 35 is composed of nano-pillars 38 formed by metal particles 38p from the housing cover member 30 being linked in a beaded manner to form a columnar shape, and a forest of high nano-pillars 38H having a height ha of 40 nm or more (in this embodiment, the height ha is approximately 200 nm) (see Figure 5 and Figure 6 The metal forming the housing cover member 30 is aluminum, and the nanorods 38 are made of aluminum and aluminum oxide and are formed of particles 38p having a diameter Da of 100 nm or less (in this embodiment, the diameter Da is approximately 30 nm).

[0053] On the other hand, in the non-nano roughened portion 36, although the above-mentioned nanopillars 38 are numerous, these nanopillars 38 are low nanopillars 38L (see FIG. 1 ) with a height ha of less than 40 nm (in the present embodiment, the height ha = less than 20 nm). Figure 7 and Figure 8 ).

[0054] Next, the resin component 70 will be described. The resin component 70 is insert-molded using a resin material 75 including a thermoplastic main resin (specifically, polyphenylene sulfide (PPS)), a thermoplastic elastomer, and a filler (specifically, a fibrous glass filler). The resin component 70 insulates the housing cover component 30 and the terminal component 50, and is airtightly bonded and fixed to the housing cover component 30 and the terminal component 50, respectively.

[0055] In the first metal-resin joint 100 composed of the terminal member 50 and the resin member 70, the resin member 70 is annular and surrounds the outer peripheral surface 50mc of the terminal member 50, and is joined to the annular resin joint portion 51 of the outer peripheral surface 50mc around the entire circumference in the circumferential direction IAH, and is fixed to the terminal member 50. In detail, the resin member 70 is filled with the above-mentioned resin material 75 between the high nano columns 58H of the nano-roughened portion 55 of the recessed portion arrangement portion 53 standing in the resin joint portion 51, and is joined to the annular nano-roughened portion 55 around the entire circumference in the circumferential direction IAH. Thus, the one side LAH1 (in the present embodiment, the same direction as the upper side AH1) and the other side LAH2 (in the present embodiment, the same direction as the lower side AH2) of the nano-roughened portion 55 in the width direction LAH (in the present embodiment, the same direction as the battery height direction AH) between the terminal member 50 and the resin member 70 are hermetically sealed.

[0056] In the second metal-resin joint 200 composed of the housing cover member 30 and the resin member 70, the resin member 70 is joined to the annular resin joint portion 31 in the metal surface 30m of the housing cover member 30 around the entire circumference in the circumferential direction IBH and fixed to the housing cover member 30. In detail, as described above, the resin joint portion 31 of the housing cover member 30 has a pair of annular recessed portion arrangement portions 33 surrounding the opening edges 30he of the upper side AH1 and the lower side AH2 of the through hole 30h. In addition, for the resin member 70, the above-mentioned resin material 75 is filled between the high nano columns 38H of the nano-roughened portions 35 standing in the recessed portion arrangement portions 33, and is joined to the pair of nano-roughened portions 35 around the entire circumference in the circumferential direction IBH. Thus, between the housing cover member 30 and the resin member 70, one side LBH1 (inner side FH1) and the other side LBH2 (outer side FH2) of each nano-roughened portion 35 in the width direction LBH (in this embodiment, the same direction as the radial direction of the through hole 30h) are hermetically sealed.

[0057] In the metal-resin joint body 100, 200 of the present embodiment, the ring-shaped resin joint part 51, 31 in the metal surface 50m, 30m of the metal member (terminal member 50 and housing cover member 30) is provided with the ring-shaped recessed part arrangement part 53, 33 which arranges a plurality of bowl-shaped recessed parts 57, 37. Although the recessed part arrangement part 53, 33 includes the non-nanoroughened part 56, 36 where the low nano-pillars 58L, 38L stand in a forest (not properly nano-roughened), the region including the high nano-pillars 58H, 38H stands in a forest (properly nano-roughened) becomes the ring-shaped nano-roughened part 55, 35. Furthermore, the resin member 70 fills the resin material 75 between the high nano-pillars 58H, 38H standing in the nano-roughened portions 55, 35, and is joined to the nano-roughened portions 55, 35 around the entire circumference, so as to airtightly seal between the terminal member 50 and the housing cover member 30 and the resin member 70, and between the one side LAH1, LBH1 and the other side LAH2, LBH2 of the nano-roughened portions 55, 35 in the width direction LAH, LBH. Therefore, in the metal-resin joint bodies 100, 200, even though the non-nano-roughened portions 56, 36 that are not properly nano-roughened exist in the recessed configuration portions 53, 33, the sealing properties between the terminal member 50 and the housing cover member 30 and the resin member 70 can be improved.

[0058] In the first metal-resin joint 100, the terminal member 50 is rod-shaped, and the resin member 70 is annular and surrounds the outer peripheral surface 50mc of the terminal member 50. In addition, the terminal member 50 is provided with a recessed portion 53 including an annular nano-roughened portion 55 surrounding the outer peripheral surface 50mc, and the resin member 70 is joined to the annular nano-roughened portion 55 around the entire circumference. Therefore, the outer peripheral surface 50mc of the terminal member 50 and the resin member 70 can be airtightly separated into one side LAH1 and the other side LAH2 in the width direction LAH of the nano-roughened portion 55, that is, one side EH1 and the other side EH2 in the axial direction EH of the terminal member 50, with the annular nano-roughened portion 55 as a boundary.

[0059] In the second metal-resin joint 200, the housing cover member 30 has a through hole 30h. A pair of opening peripheral surfaces 30me in the metal surface 30m of the housing cover member 30 are provided with recessed portions 33 each including a ring-shaped nano-roughened portion 35 surrounding the opening edge 30he, and the resin member 70 is joined to the pair of ring-shaped nano-roughened portions 35 surrounding the opening edge 30he around the entire circumference. Therefore, the opening peripheral surface 30me of the housing cover member 30 and the resin member 70 can be airtightly separated into one side LBH1 and the other side LBH2 in the width direction LBH of the nano-roughened portion 35, that is, the inner side FH1 and the outer side FH2 of the opening peripheral surface 30me, with the ring-shaped nano-roughened portions 35 as the boundary.

[0060] Next, a method for manufacturing the battery 1 including a method for manufacturing the metal-resin joints 100 and 200 will be described (see Figure 9 to Figure 1 1). First, prepare the housing cover component (metal component) 30Z before roughening. The housing cover component 30Z before roughening is obtained by using an aluminum plate and stamping. In addition, prepare the terminal component (metal component) 50Z before roughening. The terminal component 50Z before roughening is obtained by using a metal plate (a positive electrode is an aluminum plate, and a negative electrode is a copper plate) and stamping.

[0061] Furthermore, in the "first recessed portion forming step (hereinafter also referred to as "recessed portion forming step") S11" in the "metal-resin bonded body manufacturing step S1" (see Fig. 9 ), while staggering the irradiation position, pulse laser LC is intermittently irradiated to the resin joint 51 of the outer peripheral surface 50mc in the metal surface 50m of the above-mentioned terminal member 50Z to form a plurality of bowl-shaped recesses 57, thereby forming a recess configuration portion 53 (refer to Fig.10 and Figure 4 ). In addition, Figure 4 In FIG. 1 , the scanning direction (the moving direction of the irradiation position) of the pulse laser light LC is indicated by a dotted arrow.

[0062] Specifically, in the continuous arrangement direction MAH (the battery width direction BH and the battery thickness direction CH in the state where the battery 1 is formed) intersecting (orthogonal in the present embodiment) with respect to the width direction JAH of the resin joint 51, the pulse laser LC is scanned around the entire circumference of the circumferential direction IAH, and a rectangular ring-shaped concave continuous arrangement area 59 is formed in which a plurality of bowl-shaped concave portions 57 partially overlap and are connected in a row in the continuous arrangement direction MAH. In addition, the formation of a plurality of rows (10 rows in the present embodiment) of the concave continuous arrangement area 59 is repeated in the arrangement direction NAH (the battery height direction AH in the state where the battery 1 is formed) orthogonal to the continuous arrangement direction MAH, so that the 10 rows of concave continuous arrangement areas 59 partially overlap in the arrangement direction NAH, forming a concave arrangement part 53 in the shape of a multi-stage rectangular band ring. In addition, the concave continuous arrangement area 59 can also be formed in a multiple spiral shape to form the concave arrangement part 53.

[0063] For the last formed concave continuous arrangement region 59 (the concave continuous arrangement region 59 located at the bottom AH2 when the battery 1 is formed) among the 10 columns of concave continuous arrangement regions 59 constituting the concave arrangement portion 53, the forested nanopillars 58 are small and are low nanopillars 58L, so the last concave continuous arrangement region 59 becomes a non-nano roughened portion 56. The dimension of the non-nano roughened portion 56 in the width direction LAH is approximately 75 μm in the positive terminal member 50 and approximately 60 μm in the negative terminal member 50.

[0064] On the other hand, for the remaining 9-row continuous recessed portion region 59 (the 9-row continuous recessed portion region 59 on the upper side AH1 in the state of forming the battery 1), the forested nanopillars 58 are relatively large, i.e., high nanopillars 58H, so that the 9-row continuous recessed portion region 59 forms a rectangular ring-shaped nano-roughened portion 55. The dimension of the nano-roughened portion 55 in the width direction LAH is approximately 675 μm in the positive terminal member 50 and approximately 540 μm in the negative terminal member 50.

[0065] In this embodiment, the irradiation conditions of the positive laser are set to 1064nm, the peak output is set to 5kW, the pulse width is set to 150ns, the pitch pb is set to 75μm, and the spot diameter is set to 80μm. In addition, the irradiation conditions of the negative laser are set to 1064nm, the peak output is set to 20kW, the pulse width is set to 50ns, the pitch pb is set to 60μm, and the spot diameter is set to 75μm.

[0066] In the circular portion of the resin joint 51 irradiated with the pulse laser LC in a top view, the metal near the surface (aluminum at the positive electrode and copper at the negative electrode) melts and further becomes vapor. Thereafter, if the temperature of the vapor decreases, it becomes particles 58p (particles 58p of aluminum and aluminum oxide at the positive electrode and particles 58p of copper and copper oxide at the negative electrode) and accumulates on the resin joint 51. By intermittently irradiating the resin joint 51 with the pulse laser LC while staggering the irradiation position, the particles 58p accumulate and combine into a beaded shape and then into a columnar shape, forming a forest of nanopillars 58. It can be considered that in the area 59 continuously provided in the concave portion formed last, there is less accumulation of particles 58p from the surroundings, so that the height ha of the nanopillar 58 becomes lower.

[0067] In addition, in the "second recessed portion forming step (hereinafter, also referred to as the "recessed portion forming step") S12" (see Fig. 9 ), while staggering the irradiation position, the resin joint 31 of a pair of opening peripheral surfaces 30me in the metal surface 30m of the housing cover member 30Z is intermittently irradiated with pulse laser LC to form a plurality of bowl-shaped recesses 37 and to form recess configuration portions 33 (see Fig.10 and Figure 4 ).

[0068] Specifically, in the continuous arrangement direction MBH (the battery width direction BH and the battery thickness direction CH in the state where the battery 1 is formed) intersecting with the width direction JBH of the resin joint 31 (orthogonal in the present embodiment), the pulse laser LC is scanned around the entire circumference of the circumferential direction IBH to form a rectangular ring-shaped concave continuous arrangement area 39 in which a plurality of bowl-shaped concave portions 37 partially overlap and are connected in a row in the continuous arrangement direction MBH. In addition, the formation of multiple rows (in the present embodiment, 5 rows) of the concave continuous arrangement area 39 is repeatedly performed in the arrangement direction NBH (radial direction of the through hole 30h) orthogonal to the continuous arrangement direction MBH, so that the 5 rows of concave continuous arrangement areas 39 partially overlap in the arrangement direction NBH, and a concave arrangement portion 33 in the shape of a multi-stage rectangular band ring is formed. In addition, the concave continuous arrangement area 39 can also be formed in a multiple spiral shape to form the concave arrangement portion 33.

[0069] In the last formed concave continuous arrangement region 39 (the concave continuous arrangement region 39 located radially outermost) among the five rows of concave continuous arrangement regions 39 constituting the concave arrangement portion 33, the forested nanopillars 38 are small, i.e., low nanopillars 38L, and thus the last concave continuous arrangement region 39 becomes the non-nano-roughened portion 36. The dimension of the non-nano-roughened portion 36 in the width direction LBH is approximately 75 μm.

[0070] On the other hand, for the remaining four rows of the concave continuous arrangement region 39 on the radial inner side, the forested nanopillars 38 are relatively large, i.e., high nanopillars 38H, so that the rectangular ring-shaped nano-roughened portion 35 is formed by the four rows of the concave continuous arrangement region 39. The dimension of the nano-roughened portion 35 in the width direction LBH is approximately 300 μm. In addition, the irradiation conditions of the laser are the same as those when the laser is irradiated to the positive terminal member 50 in the first concave formation step S11.

[0071] Next, in the "resin forming step S13" (see Fig. 9 ), a resin component 70 is formed to be joined to the terminal component 50 and the housing cover component 30. In the present embodiment, when the positive and negative terminal components 50 are respectively inserted into the through holes 30h of the housing cover component 30, the pair of resin components 70 are insert-molded using the above-mentioned resin material 75 (refer to FIG. 11 ).

[0072] Specifically, the resin forming step S13 is performed using a molding die (not shown) having an upper die and a lower die. First, the housing cover member 30 is arranged at a predetermined position of the lower die, and the positive and negative terminal members 50 (see FIG. 1 ) are inserted into a pair of through holes 30h of the housing cover member 30. Fig.11A). Thereafter, the upper mold is moved toward the lower mold and the molding mold is closed. Next, the molten resin material 75 is injected into the two cavities of the molding mold. At this time, the resin material 75 is also filled between the high nano columns 58H standing in the nano-roughened portion 55 of the terminal component 50, and between the high nano columns 38H standing in the nano-roughened portion 35 of the housing cover component 30.

[0073] Furthermore, a resin member 70 is formed which is airtightly joined to the nano-roughened portion 55 of the terminal member 50 around the entire circumference in the circumferential direction IAH and is joined to the resin joint portion 51 around the entire circumference, and is airtightly joined to the nano-roughened portion 35 of the housing cover member 30 around the entire circumference in the circumferential direction IBH and is joined to the resin joint portion 31 around the entire circumference (see Fig. 11B and Figures 5 to 8 ). Thereafter, the cover assembly 15 in which the terminal member 50 is fixed to the housing cover member 30 via the resin member 70 is taken out from the molding die. In this way, the first metal-resin joint 100 consisting of the terminal member 50 and the resin member 70 and the second metal-resin joint 200 consisting of the housing cover member 30 and the resin member 70 are formed.

[0074] Next, in the "electrode body connection step S2" (refer to Fig. 9 ), prepare an electrode body 40 obtained by stacking a positive electrode plate 41, a negative electrode plate 42 and a separator 43, and weld the terminal extension protrusion 50b of the positive terminal member 50 in the above-mentioned cap assembly 15 to the positive electrode collector 40c of the electrode body 40 (refer to Figure 1 and Figure 2 ). In addition, the terminal extension 50b of the negative electrode terminal member 50 in the cap assembly 15 is welded to the negative electrode current collecting portion 40d of the electrode body 40. Thereafter, the electrode body 40 is covered with a bag-shaped insulating holder 7.

[0075] Next, in the "electrode body accommodating and housing forming step S3", the housing main body 20 is prepared, the electrode body 40 covered by the above-mentioned insulating holder 7 is inserted into the housing main body 20, and the opening 20c of the housing main body 20 is blocked by the housing cover 30. The opening 20c of the housing main body 20 and the peripheral portion 30f of the housing cover 30 are laser welded airtightly around the entire circumference to form the housing 10 in which the electrode body 40 is accommodated.

[0076] Next, in the "liquid injection and sealing step S4", the electrolyte 5 is injected into the outer case 10 through the liquid injection hole 30k, and the electrolyte 5 is impregnated into the electrode body 40. Thereafter, the liquid injection hole 30k is covered with the sealing member 12 from the outside, and the sealing member 12 and the outer case 10 are laser welded airtightly.

[0077] Next, in the "initial charging and aging step S5", a charging device (not shown) is connected to the battery 1 to perform initial charging on the battery 1. Thereafter, the initially charged battery 1 is left to stand for a predetermined time to age the battery 1. In this way, the battery 1 is completed.

[0078] In the manufacturing method of the metal-resin joint 100, 200 of the present embodiment, in the recess forming steps S11, S12, the pulse laser LC is scanned to form a plurality of bowl-shaped recesses 37, 57 in the arrangement directions NAH, NBH, and a plurality of recess continuous arrangement regions 59, 39 in which a plurality of recesses are connected in a row in the continuous arrangement directions MAH, MBH, thereby forming recess arrangement portions 53, 33 including the nano-roughened portions 55, 35, so that the nano-roughened portions 55, 35 can be easily formed. In addition, in the resin forming step S13, the resin member 70 is formed while the resin material 75 is filled between the high nano-pillars 58H, 38H standing in the nano-roughened portions 55, 35, so that the resin member 70 airtightly bonded to the nano-roughened portions 55, 35 around the entire circumference can be easily formed.

[0079] Furthermore, in the present embodiment, in the recess forming steps S11 and S12 , the recess continuous setting regions 59 and 39 are formed into a multi-stage ring shape to form the recess configuration portions 53 and 33 including the nano-roughened portions 55 and 35 , thereby making it possible to easily form the ring-shaped nano-roughened portions 55 and 35 in the resin bonding portions 51 and 31 .

[0080] As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to embodiment, It goes without saying that it can be applied with appropriate changes within the range which does not deviate from the summary.

Claims

1. A metal-resin joint comprising: A metal component having a ring-shaped resin joint portion on a metal surface; and a resin component that is joined to the resin joint portion and fixed to the metal component over the entire circumference of the resin joint portion; in, The resin joint portion of the metal component has a recessed portion arrangement portion, which is a ring-shaped portion surrounding the entire circumference of the circumference, and is formed by overlapping and arranging a plurality of bowl-shaped recessed portions with a diameter of 30 to 300 μm. The recess configuration portion includes: The nano-roughened portion is in the form of a ring around the entire circumference, and is composed of a forest of high nano-columns with a height of 40 nm or more, wherein the nano-columns are columnar and are formed by combining particles with a diameter of 100 nm or less from the metal forming the metal component into a beaded shape; and In the non-nano roughened part, the nano-pillars do not exist, or the nano-pillars that stand in a forest are low nano-pillars with a height of less than 40 nm. The resin component is composed of: The resin material forming the resin member is filled between the high nano columns standing in the nano-roughened portion, and is bonded to the nano-roughened portion around the entire circumference. The metal member and the resin member are hermetically sealed between one side and the other side in the width direction of the nano-roughened portion.

2. The metal-resin joint according to claim 1, wherein The metal component is composed of: The metal surface has a rod-shaped component with an outer peripheral surface, The recessed portion arrangement portion includes the ring-shaped nano-roughened portion surrounding the outer peripheral surface. The resin component is composed of: is an annular member surrounding the outer peripheral surface of the metal member, The entire circumference is joined to the ring-shaped nano-roughened portion.

3. The metal-resin joint according to claim 1, wherein The metal component is composed of: It is a form with through holes. The metal surface has an opening peripheral surface surrounding the opening edge of the through hole, The recessed portion arrangement portion is provided on the surface surrounding the opening, and the recessed portion arrangement portion includes the ring-shaped nano-roughened portion surrounding the edge of the opening. The resin member is bonded to the ring-shaped nano-roughened portion surrounding the opening edge around the entire circumference.

4. A method for manufacturing a metal-resin joint body, The metal-resin joint body comprises: A metal component having a ring-shaped resin joint portion on a metal surface; and a resin component that is joined to the resin joint portion and fixed to the metal component over the entire circumference of the resin joint portion; The resin joint portion of the metal component has a recessed portion arrangement portion, which is a ring-shaped portion surrounding the entire circumference of the circumference, and is formed by overlapping and arranging a plurality of bowl-shaped recessed portions with a diameter of 30 to 300 μm. The recess configuration portion includes: The nano-roughened portion is in the shape of a ring around the entire circumference and is composed of a forest of high nano-pillars with a height of more than 40 nm, wherein: The nanocolumns are columnar and are formed by combining particles having a diameter of 100 nm or less from the metal forming the metal component into a beaded shape; and In the non-nano roughened part, the nano-pillars do not exist, or the nano-pillars that stand in a forest are low nano-pillars with a height of less than 40 nm. The resin component is composed of: The resin material forming the resin member is filled between the high nano columns standing in the nano-roughened portion, and is bonded to the nano-roughened portion around the entire circumference. The metal member and the resin member are hermetically sealed between one side and the other side in the width direction of the nano-roughened portion. The method for manufacturing the metal-resin joint body comprises: a recess forming step of intermittently irradiating the resin joint portion of the metal component with a pulse laser while shifting the irradiation position, thereby forming a plurality of the bowl-shaped recesses and forming the recess arrangement portion; and a resin forming step of forming the resin member joined to the metal member after the recess forming step, In the recess forming step, The pulse laser is scanned in a continuous arrangement direction intersecting with the width direction of the resin joint portion, thereby forming a continuous arrangement region of recesses in which a plurality of the bowl-shaped recesses partially overlap and are connected in a row in the continuous arrangement direction. The above-mentioned operation is repeated in an arrangement direction orthogonal to the continuous arrangement direction to form a plurality of rows of the continuous arrangement areas of the concave portions. The recessed portion arrangement portion including the nano-roughened portion is formed by arranging a plurality of rows of the recessed portion continuously arranged regions so as to partially overlap in the arrangement direction. In the resin forming step, The resin member is formed so as to be airtightly bonded to the nano-roughened portion and bonded to the resin bonding portion over the entire circumference while filling the resin material between the high nano-columns standing in the nano-roughened portion.

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