Battery package and battery module

Abstract

The present invention easily confirms a connection state. A receiving section is positioned at a frame section or an insulating substrate, and a conductive metal plate is positioned at an opening side of a recessed section. The conductive metal plate has a connecting section electrically connected to a second electrode from the upper direction, and a locking section which is locked to the receiving section. A cover body is electrically insulated from the conductive metal plate.

Description

[Technical Field]

[0001] The present disclosure relates to a battery package and a battery module. [Background technology]

[0002] Patent Document 1 discloses a battery module that can be surface-mounted on a circuit board as a power source or auxiliary power source for small electronic devices. The battery module (referred to as an electrochemical cell in Patent Document 1) according to this prior art includes an insulating substrate (referred to as a base member in Patent Document 1) with a recess for accommodating a battery (referred to as an electrochemical element in Patent Document 1), and a frame (referred to as a seal ring in Patent Document 1) located on the upper surface of the insulating substrate. The insulating substrate has, on the opening side of the recess, an annular protrusion (referred to as a locking portion in Patent Document 1) that protrudes toward the inside of the recess.

[0003] A first electrode (referred to as a first current collector in Patent Document 1) is located at the bottom of the recess in the insulating substrate. A second electrode (referred to as a metal layer in Patent Document 1) is located from the lower surface of the protruding portion of the insulating substrate to the upper surface of the insulating substrate. A first external electrode (referred to as one external connection terminal in Patent Document 1) electrically connected to the first electrode, and a second external electrode (referred to as the other external connection terminal in Patent Document 1) electrically connected to the second electrode are located on the lower surface of the insulating substrate.

[0004] The battery package includes a conductive metal plate (referred to as a diaphragm spring in Patent Document 1) located on the opening side of the recess in the insulating substrate, and the conductive metal plate uses its elastic force to press the battery against the bottom side of the recess in the insulating substrate. Multiple points on the peripheral edge of the conductive metal plate are electrically connected to the second electrode while being engaged from below by protruding portions of the insulating substrate.

[0005] The battery package includes a lid (referred to as a sealing plate in Patent Document 1) that closes the frame. A current collector is located on the underside of the lid, and the lid is electrically connected to the second electrode via the current collector and the frame. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2012-69508 Summary of the Invention

[0007] The battery package of the present disclosure comprises an insulating substrate having a first surface, a second surface opposite the first surface, and a recess that opens to the first surface and is used to accommodate a battery; a frame that surrounds the recess on the first surface; a first external electrode located on the second surface; a second external electrode located on the second surface; a first electrode located on the bottom surface of the recess and electrically connected to the first external electrode; a second electrode located between the recess and the frame on the surface of the insulating substrate in a planar view of the first surface and electrically connected to the second external electrode; a receiving portion located on the frame or the insulating substrate; a connection portion located on the opening side of the recess and electrically connecting to the second electrode from above; and a locking portion that engages with the receiving portion, the conductive metal plate pressing the battery toward the bottom surface of the recess by elastic force; and a lid that is electrically insulated from the conductive metal plate and closes the frame.

[0008] In addition, the battery module according to the present disclosure includes a battery package according to the present disclosure and a battery housed in the recess of the battery package, the battery having a lower electrode electrically connected to the first electrode and an upper electrode electrically connected to the conductive metal plate. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic plan view showing a battery package and a battery module according to a first embodiment. [Figure 2] FIG. 2 is a schematic bottom view of the battery package shown in FIG. [Figure 3] FIG. 2 is a schematic cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 2 is a schematic cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 4 is a schematic plan view showing a battery package and a battery module according to another aspect of the first embodiment. [Figure 6] FIG. 6 is a schematic cross-sectional view taken along line VI-VI in FIG. 5. [Figure 7] FIG. 6 is a schematic cross-sectional view taken along line VII-VII in FIG. 5. [Figure 8] FIG. 4 is a schematic plan view showing a battery package according to another aspect of the first embodiment. [Figure 9] FIG. 4 is a schematic cross-sectional view showing a battery package according to another aspect of the first embodiment. [Figure 10] FIG. 4 is a schematic cross-sectional view showing a battery package according to another aspect of the first embodiment. [Figure 11] FIG. 10 is a schematic plan view showing a battery package and a battery module according to a second embodiment. [Figure 12] FIG. 12 is a schematic perspective view of the battery package shown in FIG. [Figure 13] FIG. 12 is a schematic perspective view of the battery package shown in FIG. [Figure 14] FIG. 14 is a schematic cross-sectional view taken along line XIV-XIV in FIG. [Figure 15] FIG. 12 is a schematic cross-sectional view taken along line XV-XV in FIG. [Figure 16] FIG. 10 is a schematic cross-sectional view showing a battery package according to another aspect of the second embodiment. [Figure 17] FIG. 10 is a schematic cross-sectional view showing a battery package according to another aspect of the second embodiment. [Figure 18] FIG. 10 is a schematic plan view showing a battery package according to a first modified example of the second embodiment. [Figure 19] 10 is a schematic plan view showing a state in which the locking piece is inserted into the insertion opening. FIG. [Figure 20] FIG. 19 is a schematic cross-sectional view taken along the line XX-XX in FIG. 18. [Figure 21] FIG. 10 is a schematic plan view showing a battery package and a battery module according to Modification 2 of the second embodiment. [Figure 22] FIG. 22 is a schematic cross-sectional view taken along line XXII-XXII in FIG. 21. [Figure 23] FIG. 10 is a schematic plan view showing a battery package and a battery module according to a third embodiment. [Figure 24] FIG. 24 is a schematic cross-sectional view taken along line XXIV-XXIV in FIG. 23. [Figure 25] FIG. 24 is a schematic cross-sectional view taken along line XXV-XXV in FIG. 23. [Figure 26] FIG. 10 is a schematic cross-sectional view showing a battery package according to another aspect of the third embodiment. [Figure 27] FIG. 10 is a schematic plan view showing a battery package and a battery module according to a fourth embodiment. [Figure 28] FIG. 28 is a schematic cross-sectional view taken along line XXVIII-XXVIII in FIG. 27. [Figure 29] FIG. 28 is a schematic cross-sectional view taken along line XXIX-XXIX in FIG. 27. [Figure 30] FIG. 10 is a schematic plan view showing a battery package and a battery module according to a fifth embodiment. [Figure 31] FIG. 31 is a schematic cross-sectional view taken along line XXXI-XXXI in FIG. 30. [Figure 32] FIG. 31 is a schematic cross-sectional view taken along line XXXII-XXXII in FIG. 30. [Figure 33] FIG. 13 is a schematic plan view showing a battery package according to a modified example of the fifth embodiment. [Figure 34] FIG. 10 is a schematic plan view showing a state before the locking piece is inserted into the catch. [Figure 35] FIG. 34 is a schematic cross-sectional view taken along line XXXV-XXXV in FIG. 33. DETAILED DESCRIPTION OF THE INVENTION

[0010] For example, in the battery module described in Prior Art Document 1, the conductive metal plate is electrically connected to the second electrode at multiple locations on the periphery thereof by engaging with protruding portions of the insulating substrate from below. Therefore, during the manufacturing stage of the battery module, it is not possible to check the connection state between the conductive metal plate and the second electrode by visual inspection. Therefore, it is not possible to visually determine whether the battery module is good or bad, which raises concerns about the sudden release of defective products.

[0011] Furthermore, because the lid is electrically connected to the second electrode, the lid is electrically connected to the upper electrode of the battery housed in the recess of the insulating substrate, which raises concerns about power leakage from the lid and short circuits due to contact between the lid and other components.

[0012] One aspect of the present disclosure makes it possible to easily check the connection state during visual inspection of a battery module.

[0013] The battery module of the present disclosure allows easy visual inspection to distinguish between good and bad products, eliminating the risk of unexpectedly releasing defective products. It also reduces the risk of short circuits between the lid and other components, while efficiently extracting power from the battery.

[0014] According to the present disclosure, the connection state can be easily confirmed during visual inspection of the battery module.

[0015] Battery packages and battery modules according to embodiments will be described in detail below with reference to the drawings. However, for the sake of convenience, the figures referred to below show simplified views of only the components necessary for explaining the embodiments. Therefore, the battery packages and battery modules according to the embodiments may include optional components not shown in the figures referred to. Furthermore, the dimensions of the components in the figures do not necessarily faithfully represent the actual dimensions of the components and the dimensional ratios of each member. The term "rectangular" is not limited to a strict rectangular shape and includes shapes that can be visually recognized as rectangular overall, even if the corners are curved, for example.

[0016] [First embodiment] A battery package 1 and a battery module 100 according to the first embodiment will be described with reference to FIGS. 1 to 10. FIG. 1 is a schematic plan view showing the battery package 1 and the battery module 100 according to the first embodiment. FIG. 2 is a schematic bottom view of the battery package 1 shown in FIG. 1. FIG. 3 is a schematic cross-sectional view taken along line III-III in FIG. 1. FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 1. FIG. 5 is a schematic plan view showing the battery package 1 and the battery module 100 according to another aspect of the first embodiment. FIG. 6 is a schematic cross-sectional view taken along line VI-VI in FIG. 5. FIG. 7 is a schematic cross-sectional view taken along line VII-VII in FIG. 5. FIG. 8 is a schematic plan view showing the battery package 1 according to another aspect of the first embodiment. FIGS. 9 and 10 are schematic cross-sectional views showing the battery package according to another aspect of the first embodiment.

[0017] As shown in the example of FIGS. 1 to 7, a battery module 100 according to the first embodiment includes a battery package 1 according to the first embodiment and a battery 200 mounted in the battery package 1. The battery package 1 may include an insulating substrate 2, and the shape of the insulating substrate 2 in a plan view may be, for example, rectangular. The insulating substrate 2 is made of ceramics such as an aluminum oxide sintered body (alumina ceramics), an aluminum nitride sintered body, a mullite sintered body, or a glass ceramic sintered body. The insulating substrate 2 may have a single insulating layer or multiple laminated insulating layers. The shape of the insulating substrate 2 in a plan view is not limited to a rectangular shape and can be modified as appropriate.

[0018] As shown in the examples of FIGS. 1 and 3 to 7, the insulating substrate 2 may have a first surface 2a, a second surface 2b located opposite the first surface 2a, and multiple side surfaces 2c located between the first surface 2a and the second surface 2b. The first surface 2a of the insulating substrate 2 may be flat or may have irregularities. The second surface 2b of the insulating substrate 2 may be flat or may have irregularities. The insulating substrate 2 may have a recess 21 for accommodating the battery 200, and the recess 21 may open to the first surface 2a. The recess 21 of the insulating substrate 2 may have, for example, a circular shape in a planar view. The inner surface of the recess 21 of the insulating substrate 2 may be parallel to the thickness direction of the insulating substrate 2. The size of the recess 21 of the insulating substrate 2 in a planar view may be slightly larger than the size of the battery 200 in a planar view. The depth of the recess 21 of the insulating substrate 2 may be approximately the same as the thickness of the battery 200. The shape of the recess 21 in the insulating substrate 2 in plan view is not limited to a circular shape, and may be changed depending on the shape of the battery 200 in plan view.

[0019] As shown in the examples of FIGS. 1 and 3 to 7 , the battery package 1 may include a frame 3 surrounding the recess 21 on the first surface 2a of the insulating substrate 2. The frame 3 may include an insulating frame 31 positioned to surround the recess 21 on the first surface 2a of the insulating substrate 2. The insulating frame 31 may be made of ceramic and may be integrated with the insulating substrate 2. The insulating frame 31 may have a single insulating layer or multiple stacked insulating layers. The outline shape of the insulating frame 31 in a plan view may be rectangular. The inner surface of the insulating frame 31 may be circular. The size of the inner surface of the insulating frame 31 in a plan view may be slightly larger than the size of the recess 21 of the insulating substrate 2 in a plan view. The shape of the inner surface of the insulating frame 31 in a plan view is not limited to a rectangular shape and may be changed depending on the shape of the recess 21 of the insulating substrate 2 in a plan view, the shape or arrangement of the second electrode 7 (described later), and the shape or arrangement of the recessed step 31d (described later).

[0020] As in the examples shown in FIGS. 1 and 3 to 7, the insulating frame 31 may have a plurality of recessed steps 31d as receiving portions, and the plurality of recessed steps 31d may be located on the inner surface of the insulating frame 31. The plurality of recessed steps 31d of the insulating frame 31 may be arranged rotationally symmetrically with respect to the center of the insulating frame 31. In the first embodiment, the number of recessed steps 31d as receiving portions is two, but it may be three or more. Instead of the plurality of recessed steps 31d as receiving portions, an annular recessed step (not shown) may be located on the inner surface of the insulating frame 31.

[0021] 1 and 3 to 7, the frame 3 may have a frame-shaped metal film 32 located on the upper surface of the insulating frame 31 so as to surround the open side of the insulating frame 31. The frame-shaped metal film 32 may be bonded to the upper surface of the insulating frame 31. The frame-shaped metal film 32 is made of a metal powder metallization containing tungsten (W), molybdenum (Mo), manganese (Mn), silver (Ag), copper (Cu), or the like as an ingredient.

[0022] As in the examples shown in Figures 1, 3, and 4, the frame 3 may have a metal frame 33 located on the frame-shaped metal film 32 so as to surround the open side of the insulating frame 31. The metal frame 33 may be joined to the frame-shaped metal film 32 with a brazing material. The metal frame 33 may have a rectangular frame shape in plan view. The material of the metal frame 33 should preferably have a small thermal expansion difference with ceramics, and for example, an iron-nickel (Fe-Ni) alloy or an iron-nickel-cobalt (Fe-Ni-Co) alloy may be used.

[0023] 5 to 7, the battery package 1 may omit the metal frame 33 from the configuration of the frame portion 3. In this case, the battery package 1 and the battery module 100 can be made thinner.

[0024] As shown in the examples of FIGS. 2 to 4, 6, and 7, the battery package 1 may include a first external electrode 4 located on the second surface 2b of the insulating substrate 2. The first external electrode 4 may be located on one end side of the second surface 2b of the insulating substrate 2. The first external electrode 4 may be printed on the second surface 2b of the insulating substrate 2 and baked by firing. The first external electrode 4 may extend from the second surface 2b of the insulating substrate 2 to the side surface 2c (including the corner between the multiple side surfaces 2c). The first external electrode 4 may be electrically connectable to the first electrode of the mounting board via solder. The first external electrode 4 is made of the same metal powder metallization as the frame-shaped metal film 32.

[0025] As shown in the examples of FIGS. 2 to 4, 6, and 7, the battery package 1 may include a second external electrode 5 located on the second surface 2b of the insulating substrate 2. The second external electrode 5 may be located on the other end side of the second surface 2b of the insulating substrate 2. The second external electrode 5 may be printed on the second surface 2b of the insulating substrate 2 and baked by firing. The second external electrode 5 may extend from the second surface 2b of the insulating substrate 2 to the side surface 2c. The second external electrode 5 may be electrically connectable to the second electrode of the mounting board via solder. The second external electrode 5 is made of the same metal powder metallization as the frame-shaped metal film 32, etc.

[0026] As shown in the examples of Figures 3, 4, 6, and 7, the battery package 1 may include a first electrode 6 located on the bottom surface of the recess 21 of the insulating substrate 2. The first electrode 6 may be printed on the bottom surface of the recess 21 of the insulating substrate 2 and baked by firing. The first electrode 6 is a bottom electrode of the battery 200 accommodated in the recess 21 of the insulating substrate 2. 210 The first electrode 6 may extend from the bottom surface of the recess 21 of the insulating substrate 2 to the inside of the insulating substrate 2. The first electrode 6 may cover the entire bottom surface of the recess 21 of the insulating substrate 2.

[0027] The first electrode 6 is electrically connected to the first external electrode 4 by a first connecting wire J1. The first connecting wire J1 may have a through conductor penetrating one or more insulating layers and one or more wiring layers positioned between the insulating layers. The first electrode 6 and the first connecting wire J1 are made of the same metal powder metallization as the frame-shaped metal film 32, etc.

[0028] When the first electrode 6 extends into the insulating substrate 2, the first connection wiring J1 is located in a thick portion of the insulating substrate 2, which is superior in strength. Also, the first electrode 6 does not have to extend into the insulating substrate 2. In this case, the first connection wiring J1 penetrates from the bottom surface of the recess 21 of the insulating substrate 2 to the second surface 2b, and the path from the battery 200 to the first external electrode 4 is short and has low resistance, thereby improving the efficiency of extracting power from the battery 200. The first electrode 6 and the first external electrode 4 may overlap in a top view, and if the first connection wiring J1 is located in the overlapping portion, the first connection wiring J1 will have low resistance.

[0029] As in the examples shown in FIGS. 1 and 3 to 7 , the battery package 1 may include a second electrode 7 located between the recess 21 on the first surface 2a of the insulating substrate 2 and the insulating frame 31 (frame 3). The second electrode 7 may be located between the recess 21 on the surface including the first surface 2a of the insulating substrate 2 and the frame 3 in a plan view of the first surface 2a of the insulating substrate 2. The second electrode 7 may be printed between the recess 21 on the first surface 2a of the insulating substrate 2 and the insulating frame 31, and baked by firing. The second electrode 7 may extend to the space between the insulating substrate 2 and the insulating frame 31. The second electrode 7 may be located between the upper electrode 21 of the battery 200 accommodated in the recess 21 of the insulating substrate 2. 220 1, 3, and 4, two second electrodes 7 may be located diagonally on the rectangular insulating substrate 2. In this case, the multiple second electrodes 7 may be electrically connected to each other by internal wiring (not shown). Alternatively, as shown in FIGS. 5 to 7, the second electrode 7 may be annular so as to surround the opening side of the recess 21 of the insulating substrate 2.

[0030] The second electrode 7 is electrically connected to the second external electrode 5 by a second connection wiring J2. The second connection wiring J2 may have a through conductor penetrating one or more insulating layers and one or more wiring layers located between the insulating layers. The second electrode 7 and the second connection wiring J2 are made of the same metal powder metallization as the frame-shaped metal film 32, etc.

[0031] When the second electrode 7 extends between the insulating substrate 2 and the insulating frame 31, the second connection wiring J2 is located in a thick portion of the insulating substrate 2, which provides excellent strength. The second electrode 7 does not have to extend between the insulating substrate 2 and the insulating frame 31. In this case, the second connection wiring J2 penetrates from the periphery of the recess 21 on the first surface 2a of the insulating substrate 2 to the second surface 2b, which shortens the path from the battery 200 to the second external electrode 5 and reduces resistance, thereby improving the efficiency of extracting power from the battery 200. The second electrode 7 and the second external electrode 5 may overlap in a top view, and if the second connection wiring J2 is located in this overlapping portion, the second connection wiring J2 will have low resistance.

[0032] As shown in the examples of FIGS. 3, 4, 6, and 7, when the insulating substrate 2 and insulating frame 31 are made of, for example, an aluminum oxide sintered body, the insulating substrate 2 and insulating frame 31 are manufactured as follows. A slurry is produced by adding and mixing an appropriate organic binder and solvent to raw material powders such as aluminum oxide and silicon oxide. This slurry is formed into a sheet using a doctor blade method, a calendar roll method, or the like to produce a ceramic green sheet for the insulating layer. The ceramic green sheet for the insulating layer is then punched appropriately to form holes with recesses 21 and recessed steps 31d. A plurality of ceramic green sheets for the insulating layer are then stacked to produce a laminate. The laminate is then fired at a high temperature (approximately 1300 to 1600°C) to produce the insulating substrate 2 and insulating frame 31.

[0033] When the frame-shaped metal film 32, the first external electrode 4, the second external electrode 5, the first electrode 6, the first connecting wire J1, the second electrode 7, and the second connecting wire J2 are, for example, metallized layers of tungsten, they can be formed as follows. The frame-shaped metal film 32, the first external electrode 4, the second external electrode 5, the first electrode 6, the wiring layer of the first connecting wire J1, the second electrode 7, and the wiring layer of the second connecting wire J2 are formed by printing a metal paste made by mixing tungsten powder with an organic solvent and an organic binder at predetermined positions on ceramic green sheets for insulating layers using a method such as screen printing, and then firing the laminate. The through conductors of the first connecting wire J1 and the second connecting wire J2 are formed by providing through conductor holes at predetermined positions on the ceramic green sheets for insulating layers and filling the through conductor holes with the metal paste.

[0034] The surfaces of the frame-shaped metal film 32, the first external electrode 4, the second external electrode 5, the first electrode 6, the first connection wiring J1, the second electrode 7, and the second connection wiring J2 that are exposed to the outside may be coated with a metal plating layer such as a nickel plating layer or a gold plating layer by a plating method such as electrolytic plating or electroless plating. This effectively reduces corrosion of the frame-shaped metal film 32, the first external electrode 4, the second external electrode 5, etc. The metal plating layer is not limited to a nickel plating layer or a gold plating layer, and may be other metal plating layers such as a nickel plating layer, a palladium plating layer, or a gold plating layer.

[0035] As in the examples shown in Figures 1 and 2 to 7, the battery package 1 may include a conductive metal plate 8 that uses elastic force to press the battery 200 against the bottom side of the recess 21 of the insulating substrate 2. The conductive metal plate 8 may be located on the opening side of the recess 21 of the insulating substrate 2. The conductive metal plate 8 may be located inside the insulating frame 31. The conductive metal plate 8 may have a metal plate main body 81 that is electrically connected to the upper electrode 220 of the battery 200, and the shape of the metal plate main body 81 in a planar view may be, for example, circular.

[0036] The metal plate main body 81 may be sized to substantially cover the opening of the recess 21 of the insulating substrate 2. In other words, the metal plate main body 81 may be sized to cover the upper electrode 220 of the battery 200 housed in the recess 21 of the insulating substrate 2. The metal plate main body 81 may be connected to the second electrode 7 in a state where it covers 50% or more of the opening area of ​​the recess 21 of the insulating substrate 2. In other words, the metal plate main body 81 may be electrically connected to at least 50% or more of the area of ​​the upper electrode 220 of the battery 200.

[0037] As shown in the examples in FIGS. 1 , 3 , 5 , and 6 , connection pieces 82 that electrically connect to the second electrode 7 from above may be provided at multiple locations on the peripheral edge of the metal plate main body 81. In other words, the conductive metal plate 8 may have multiple connection pieces 82 on its peripheral edge as connection portions that electrically connect to the second electrode 7 from above. Each connection piece 82 may be a strip-shaped portion that protrudes outward from the metal plate main body 81. The multiple connection pieces 82 are part of the peripheral edge of the conductive metal plate 8. The multiple connection pieces 82 may be arranged rotationally symmetrically with respect to the center of the metal plate main body 81. When each connection piece 82 is a strip-shaped portion that protrudes outward from the metal plate main body 81, the elastic force of each connection piece 82 can be adjusted by changing the width of each connection piece 82, thereby adjusting the degree of connection (connectivity) between each connection piece 82 and the second electrode 7.

[0038] 1 and 5, each connection piece 82 may extend toward a corner 3C of the frame 3. Each connection piece 82 may extend toward a corner of the insulating substrate 2. Furthermore, as shown in the example of FIG. 8, each connection piece 82 may extend toward a side of the frame 3 (an intermediate portion between the corners 3C). In the first embodiment, the number of connection pieces 82 is two, but it may be one or three or more.

[0039] As shown in the examples in Figures 1, 4, 5, and 7, locking pieces 83 that are engaged from below with the recessed step portions 31d of the insulating frame 31 may be provided at multiple locations on the peripheral edge of the metal plate main body 81. In other words, the conductive metal plate 8 may have multiple locking pieces 83 on its peripheral edge as locking portions that are engaged from below with the recessed step portions 31d of the insulating frame 31. Each locking piece 83 may be a strip-shaped portion that protrudes outward from the metal plate main body 81. The multiple locking pieces 83 are part of the peripheral edge of the conductive metal plate 8. The multiple locking pieces 83 may be arranged rotationally symmetrically with respect to the center of the metal plate main body 81.

[0040] As in the examples shown in FIGS. 1 and 5, each locking piece 83 may extend toward a corner 3C of the frame 3. Each connecting piece 82 may extend toward a corner 3C of the frame 3, and each locking piece 83 may extend toward a corner 3C of the frame 3. In this case, two connecting pieces 82 may extend in one diagonal direction of the rectangular insulating substrate 2, and two locking pieces 83 may extend in the other diagonal direction of the rectangular insulating substrate 2. Furthermore, as in the example shown in FIG. 8, each locking piece 83 may extend toward a side of the frame 3. In the first embodiment, the number of locking pieces 83 is two, but it may be three or more.

[0041] In the battery package 1, the locking pieces 83 of the conductive metal plate 8 are locked from below into the recessed step portions 31d of the insulating frame 31, and the conductive metal plate 8 uses its elastic force to press the battery 200 against the bottom surface of the recess 21 of the insulating substrate 2. This allows the battery 200 to be mechanically fixed to the bottom of the recess 21 of the insulating substrate 2. If the locking pieces 83 are strip-shaped portions that protrude outward from the metal plate main body 81, the elastic force of each locking piece 83 can be adjusted by changing the width of each locking piece 83.

[0042] As shown in the examples in FIGS. 3, 4, 6, and 7, the battery package 1 may include a flat lid 9 that closes the opening of the frame 3. The lid 9 may have a rectangular shape in plan view, for example. The lid 9 may be joined to the frame 3. The lid 9 may be electrically insulated from the conductive metal plate 8. The lid 9 may be made of, for example, ceramics or metal. The lid 9 may be made of a material that has a small thermal expansion difference with ceramics, such as an iron-nickel (Fe-Ni) alloy or an iron-nickel-cobalt (Fe-Ni-Co) alloy. As long as the lid 9 can close the opening of the frame 3, the lid 9 may have a shape other than a rectangular shape in plan view.

[0043] The lid body 9 and the frame 3 may be joined using a joining material such as a brazing material. The lid body 9 and the frame 3 may be joined using glass, a brazing material, or a resin material as a joining material in order to improve the airtightness of the battery module 100. When the lid body 9 made of ceramic and the frame 3 are joined using a brazing material, a metal film may also be located on the outer edge of the lower surface of the lid body 9, and the metal film may have the same configuration as the frame-shaped metal film 32, for example.

[0044] The metal lid 9 and the metal frame 33 may be joined by welding such as seam welding to improve the airtight sealing of the battery module 100. When the metal frame 33 is omitted from the configuration of the frame 3, the metal lid 9 may be joined to the frame-shaped metal film 32 by welding such as direct seam welding, laser welding, or electron beam welding. Joining using seam welding, direct seam welding, laser welding, or electron beam welding involves localized heating of the joint, and therefore reduces the thermal impact on the battery 200 compared to using brazing joining, which involves overall heating (reflow heating).

[0045] The battery package 1 may be hermetically sealed in a low dew point atmosphere of -40°C or less, such as a nitrogen atmosphere, an argon atmosphere, or a vacuum atmosphere. This allows the environment around the battery 200 to be maintained at a low dew point, preventing moisture and oxygen from entering the battery package 1 from the outside and reducing the risk of deterioration of the battery material of the battery 200. Furthermore, before sealing the battery package 1, moisture inside the battery package 1 may be evaporated by pre-baking or the like.

[0046] 1, 3, 5, and 6, the insulating frame 31 has, on its upper surface, a plurality of first cutouts 31n that connect to the recesses 21 of the insulating substrate 2. The plurality of first cutouts 31n may be arranged rotationally symmetrically with respect to the center of the insulating frame 31. The second electrode 7 may overlap the first cutouts 31n of the insulating frame 31 in a plan view. The tip sides of the connection pieces 82 of the conductive metal plate 8 may overlap the first cutouts 31n of the insulating frame 31 in a plan view. In other words, before the lid 9 closes the opening of the frame 3, the upper sides (upper side) of the connection pieces 82 of the conductive metal plate 8 may be open.

[0047] The insulating frame 31 may have a plurality of second cutouts above the recessed step 31d. A portion of each locking piece 83 of the conductive metal plate 8 may overlap with each second cutout of the insulating frame 31 in a plan view. As in the example shown in Figures 1 and 5, the battery package 1 may omit the second cutouts from the configuration of the insulating frame 31. The insulating frame 31 having the plurality of first cutouts 31n and the plurality of second cutouts is formed by punching a ceramic green sheet for an insulating layer.

[0048] 9 and 10, the insulating frame 31 may have a guide portion 31g above the recessed step portion 31d. The cross-sectional shape of the guide portion 31g of the insulating frame 31 may be stepped or tapered downward so as to approach the center line 21s of the recess 21 of the insulating substrate 2. The insulating frame 31 having the guide portion 31g is formed by punching a ceramic green sheet for an insulating layer.

[0049] 1 and 3 to 7, the battery module 100 according to the first embodiment includes the battery package 1 according to the first embodiment and a battery 200 housed in a recess 21 of an insulating substrate 2 of the battery package 1. The lower electrode of the battery 200 210 may be electrically connected to the first electrode 6. 220 may be electrically connected to the conductive metal plate 8. Since the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1 and the battery module 100 can be surface-mounted on a mounting board.

[0050] The battery 200 may be any battery having a positive electrode or a negative electrode on the top and bottom, respectively. For example, the battery 200 may be an all-solid-state battery in which an anode layer, an electrolyte layer, and a cathode layer are stacked. The battery 200 may have current collectors on the outside of the anode layer and the outside of the cathode layer, respectively. One of the anode layer and the cathode layer of the all-solid-state battery is the bottom electrode 210 of the battery 200, and the other of the anode layer and the cathode layer of the all-solid-state battery is the top electrode 220 of the battery 200. The battery 200 may also be a coin battery in which the cathode layer, electrolyte layer, anode layer, and current collector layer are encapsulated in a metal exterior material. One electrode of the coin battery is the bottom electrode 210 of the battery 200, and the other electrode of the coin battery is the top electrode 220 of the battery 200.

[0051] In the battery package 1 and battery module 100, the second electrode 7, which is a metallized pad, is located between the recess 21 on the surface including the first surface 2a of the insulating substrate 2 and the frame 3 in a plan view of the first surface 2a of the insulating substrate 2. Therefore, during the manufacturing stage of the battery module 100, the second electrode 7 is in a position that is visible externally, making it easy to check the finished state of the battery package 1. Specifically, it is easy to check the surface state of the second electrode 7 (including checking for defects during printing) and measure the plating thickness.

[0052] Furthermore, in the battery package 1 and the battery module 100, the conductive metal plate 8 has a plurality of connection pieces 82 on its periphery as connection parts that electrically connect to the second electrode 7 from above. Therefore, during the manufacturing stage of the battery module 100, the connection state between the second electrode 7, which is a metallized pad, and the plurality of connection pieces 82 can be easily visually confirmed.

[0053] Therefore, according to the first embodiment of the present disclosure, during the manufacturing stage of the battery module 100, it is possible to easily visually determine whether the battery module 100 is good or defective, thereby reducing the concern that defective products will suddenly be released (effect (1)).

[0054] In the battery package 1 and the battery module 100, the lid 9 is electrically insulated from the conductive metal plate 8. Therefore, according to the first embodiment of the present disclosure, the risk of a short circuit between the lid 9 and other components is reduced, and power can be efficiently extracted from the battery 200 without discharging from the lid 9 to the outside (effect (2)).

[0055] In particular, when the conductive metal plate 8 is located inside the insulating frame 31, the insulation between the second electrode and the lid 9, etc. can be further improved. Therefore, according to the first embodiment of the present disclosure, it is possible to reduce the risk of a short circuit between the conductive metal plate 8 and the lid 9, etc. due to the spreading of the brazing material, etc. (effect (3)).

[0056] When the metal plate body 81 is connected to the second electrode 7 in a state where it covers 50% or more of the opening area of ​​the recess 21 of the insulating substrate 2, the metal plate body 81 and the upper electrode 200 of the battery 200 220 At least 50% or more of the area of ​​the battery 200 can be electrically connected. As a result, according to the first embodiment of the present disclosure, the connection resistance between the metal plate body 81 and the upper electrode 220 of the battery 200 can be reduced, and the power extraction efficiency can be increased. In addition, when the lid body 9 is joined or the battery module 100 is mounted, the battery 200 can be protected from radiant heat from the lid body 9 (effect (4)).

[0057] When each connection piece 82 extends toward a corner 3C of the frame 3, the size of the insulating substrate 2 in a plan view and the size of the frame 3 in a plan view can be made smaller than when each connection piece 82 extends toward a side of the frame 3. As a result, according to the first embodiment of the present disclosure, the battery package 1 and the battery module 100 can be made more compact (effect (5)).

[0058] When the locking pieces 83 extend toward the corners 3C of the frame 3, the size of the insulating substrate 2 in a plan view and the size of the frame 3 in a plan view can be made smaller than when the locking pieces 83 extend toward the sides of the frame 3. As a result, according to the first embodiment of the present disclosure, the battery package 1 and the battery module 100 can be made more compact (effect (6)).

[0059] When each second electrode 7 overlaps with each first notch 31n of the insulating frame 31 in a plan view, each connection piece 82 can be easily electrically connected to the second electrode 7 from above without contacting the connection pieces 82 with the inner surface of the insulating frame 31. As a result, according to the first embodiment of the present disclosure, the assembly (manufacturability) of the battery module 100 is improved, and misalignment of each connection piece 82 in the surface direction (direction along the first surface 2a) is suppressed, thereby improving the connectivity between each connection piece 82 and the second electrode 7.

[0060] When a portion of each locking piece 83 overlaps with each second notch of the insulating frame 31 in a plan view, each locking piece 83 can be easily inserted into and locked into the recessed step portion 31d of the insulating frame 31 while being elastically deformed. As a result, according to the first embodiment of the present disclosure, the assembly of the battery module 100 can be improved.

[0061] When the cross-sectional shape of the guide portion 31g of the insulating frame body 31 is stepped or tapered as described above, it becomes easier to insert and lock the locking pieces 83 into the recessed step portion 31d of the insulating frame body 31 while elastically deforming them. As a result, according to the first embodiment of the present disclosure, it is possible to improve the assembly efficiency of the battery module 100.

[0062] Second Embodiment A battery package 1A and a battery module 100A according to the second embodiment will be described with reference to Figs. 11 to 23. Fig. 11 is a schematic plan view showing the battery package 1A and the battery module 100A according to the second embodiment. Fig. 12 is a schematic perspective view of the battery package 1A shown in Fig. 11. Fig. 13 is a schematic perspective view of the battery package 1A shown in Fig. 11. Fig. 14 is a schematic cross-sectional view taken along line XIV-XIV in Fig. 11. Fig. 15 is a schematic cross-sectional view taken along line XV-XV in Fig. 11. Figs. 16 and 17 are schematic cross-sectional views showing a battery package 1A according to another aspect of the second embodiment.

[0063] As shown in the example of FIGS. 11 to 15, a battery module 100A according to the second embodiment includes a battery package 1A according to the second embodiment and a battery 200 mounted in the battery package 1A. The battery package 1A according to the second embodiment has the same configuration as the battery package 1 according to the first embodiment, except for some components. The following describes the configuration of the battery package 1A according to the second embodiment that differs from the battery package 1 according to the first embodiment. For ease of explanation, the same reference numerals are used to designate components that have the same functions as the components described in the first embodiment.

[0064] 11, the insulating frame 31 may have two inner corner portions 31C on its inner surface. The two inner corner portions 31C may be arranged rotationally symmetrically with respect to the center of the insulating frame 31. In the second embodiment, the number of recessed steps 31d serving as receiving portions (fixing portions) is two, but may be three or more. The insulating frame 31 may have an annular recessed step portion on its inner surface instead of the multiple recessed steps 31d.

[0065] 11, 12, and 14, the second electrode 7 may be located between the recess 21 on the first surface 2a of the insulating substrate 2 and the inner corner 31C side of the insulating frame 31. The second electrode 7 may be located between the recess 21 on the surface including the first surface 2a of the insulating substrate 2 and the frame 3, in a plan view of the first surface 2a of the insulating substrate 2. The second electrode 7 may be bonded between the recess 21 on the first surface 2a of the insulating substrate 2 and the inner corner 31C side of the insulating frame 31. The second electrode 7 may extend between the insulating substrate 2 and the insulating frame 31.

[0066] 11 , each connection piece 82 of the conductive metal plate 8 may extend toward an inner corner 31C of the insulating frame 31. By having each connection piece 82 of the conductive metal plate 8 extend in this manner, the upper side (upper portion) of each connection piece 82 of the conductive metal plate 8 may be open before the cover 9 closes the frame 3.

[0067] 14 and 16, each connection piece 82 of the conductive metal plate 8 may have an inverted U-shaped curved portion 82f that straddles the edge of the recess 21 of the insulating substrate 2. As in the example shown in Fig. 17, each connection piece 82 of the conductive metal plate 8 may have an L-shaped curved portion 82f that straddles the edge of the recess 21 of the insulating substrate 2. As in the example shown in Fig. 16 and 17, the tip end side (tip end side) of each connection piece 82 of the conductive metal plate 8 may be bent in an arc shape.

[0068] In the battery package 1A, the locking pieces 83 of the conductive metal plate 8 are locked from below into the recessed step portions 31d of the insulating frame 31, and the elastic force of the conductive metal plate 8 presses the battery 200 against the bottom side of the recessed portion 21 of the insulating substrate 2. This allows the battery 200 to be mechanically fixed to the bottom of the recessed portion 21 of the insulating substrate 2.

[0069] 11 and 12, a battery module 100A according to the second embodiment includes a battery package 1A according to the second embodiment and a battery 200 housed in a recess 21 of an insulating substrate 2 of the battery package 1A. 210may be electrically connected to the first electrode 6. 220 may be electrically connected to the conductive metal plate 8. Because the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1A and the battery module 100A can be surface-mounted on a mounting board.

[0070] In the battery package 1A and battery module 100A according to the second embodiment, the second electrode 7, which is a metallized pad, is located between the recess 21 on the surface including the first surface 2a of the insulating substrate 2 and the frame 3 in a plan view of the first surface 2a of the insulating substrate 2. Therefore, during the manufacturing stage of the battery module 100A, the second electrode 7 is in a position that is visible externally, making it easy to check the finished state of the battery package 1A. Specifically, it is easy to check the surface state of the second electrode 7 (including checking for defects during printing) and measure the plating thickness.

[0071] Furthermore, in the battery package 1A and the battery module 100A, the conductive metal plate 8 has a plurality of connection pieces 82 on its periphery as connection parts that electrically connect from above to the second electrode 7. Therefore, during the manufacturing stage of the battery module 100A, the connection state between the second electrode 7, which is a metallized pad, and the connection pieces 82 of the conductive metal plate 8 can be easily visually confirmed.

[0072] Therefore, according to the second embodiment of the present disclosure, in the manufacturing stage of the battery module 100A, it is possible to easily visually determine whether the battery module 100A is good or defective, eliminating the concern of accidentally releasing defective products.

[0073] When the upper side of each connection piece 82 of the conductive metal plate 8 is open before the lid body 9 closes the frame portion 3, each connection piece 82 can be easily electrically connected to the second electrode 7 from above without contacting the connection piece 82 with the inner surface of the insulating frame body 31. As a result, according to the second embodiment of the present disclosure, the assembly (manufacturability) of the battery module 100A can be improved.

[0074] When the second electrode 7 is positioned between the recess 21 on the first surface 2a of the insulating substrate 2 and the inner corner 31C of the insulating frame 31, the area of ​​the second electrode 7 can be increased. This makes it possible to easily electrically connect each connection piece 82 to the corresponding second electrode 7 from above, and also increases the connection strength between the connection piece 82 and the second electrode 7. As a result, according to the second embodiment of the present disclosure, the ease of assembly and connection reliability of the battery module 100A can be improved.

[0075] When each connection piece 82 has a curved portion 82f, each connection piece 82 can be easily electrically connected to the corresponding second electrode 7 from above without contacting (interfering with) the edge of the recess 21 of the insulating substrate 2. Furthermore, the shape of the curved portion 82f of each connection piece 82 can set the elastic force of the conductive metal plate 8, thereby maintaining the connection between the connection piece 82 and the second electrode 7. As a result, according to the second embodiment of the present disclosure, the assembly ease and connection reliability of the battery module 100A can be improved.

[0076] When the tip side of each connection piece 82 is bent in an arc shape, the tip side of the connection piece 82 does not get caught even when it comes into contact with the inner surface of the insulating frame 31, and each connection piece 82 can be easily electrically connected to each second electrode 7 from above. As a result, according to the second embodiment of the present disclosure, the assembly of the battery module 100A can be improved.

[0077] In addition, the second embodiment of the present disclosure also achieves the same effects as the above-described effects (2), (3), (4), (5), and (6).

[0078] (Modification 1 of the second embodiment) A battery package 1A according to Modification 1 of the second embodiment will be described with reference to Fig. 18 to Fig. 20. Fig. 18 is a schematic plan view showing the battery package 1A according to Modification 1 of the second embodiment. Fig. 19 is a schematic plan view showing the state in which the locking piece 83 of the conductive metal plate 8 is inserted into the insertion opening 31i of the insulating frame 31. Fig. 20 is a schematic cross-sectional view taken along line XX-XX in Fig. 18.

[0079] 18 to 20, in a battery package 1A according to Modification 1 of the second embodiment, the insulating frame 31 may have a plurality of insertion openings 31i that open toward the upper side and toward the recess 21 side of the insulating substrate 2. Each insertion opening 31i of the insulating frame 31 may be connected to each recessed step 31d.

[0080] According to the battery package 1A of the first modified example of the second embodiment, simply by rotating the conductive metal plate 8 in one direction (the direction of the arrow in FIG. 19 ), the locking pieces 83 can be inserted into the insertion openings 31i of the insulating frame 31, and the locking pieces 83 can be easily locked from below into the recessed step portions 31d of the insulating frame 31. This allows the battery module 100A to be easily assembled (manufactured) according to the modified example of the second embodiment of the present disclosure.

[0081] Additionally, the first modification of the second embodiment of the present disclosure also achieves the same effects as the second embodiment described above.

[0082] (Modification 2 of the second embodiment) A battery package 1A according to Modification 2 of the second embodiment will be described with reference to Fig. 21 and Fig. 22. Fig. 21 is a schematic plan view showing a battery package and a battery module according to Modification 2 of the second embodiment. Fig. 22 is a schematic cross-sectional view taken along line XXII-XXII in Fig. 21.

[0083] As shown in the examples in FIGS. 21 and 22, the insulating frame 31 may have four inner corner portions 31C on its inner surface. The four inner corner portions 31C may be arranged rotationally symmetrically with respect to the center of the insulating frame 31. In addition, in Modification 2 of the second embodiment, the number of recessed step portions 31d may be four. The number of second electrodes 7 may be four. The number of connecting pieces 82 and the number of locking pieces 83 may each be four. The number of recessed step portions 31d, the number of second electrodes 7, the number of connecting pieces 82, and the number of locking pieces 83 are not limited to four, and may be three or five or more.

[0084] According to the battery package 1A of the second modification of the second embodiment, the contact area between the second electrode 7 and the connecting piece 82 is increased, resulting in a low-resistance connection between the second electrode 7 and the conductive metal plate 8. As a result, according to the second modification of the second embodiment of the present disclosure, the power of the battery 200 can be extracted more efficiently.

[0085] Furthermore, in the battery package 1A according to the second modification of the second embodiment, the elastic force of the conductive metal plate 8 can press the battery 200 evenly with a stronger force against the bottom side of the recess 21 of the insulating substrate 2. As a result, according to the second modification of the present disclosure, the fixing force of the battery 200 to the bottom of the recess 21 of the insulating substrate 2 can be increased, and the long-term reliability of the battery module 100A can be improved. 210 and the first electrode 6, thereby enabling the power of the battery 200 to be extracted more efficiently.

[0086] Additionally, the second modification of the second embodiment of the present disclosure also provides the same effects as the second embodiment described above.

[0087] Third Embodiment A battery package 1B and a battery module 100B according to the third embodiment will be described with reference to Fig. 23 to Fig. 25. Fig. 23 is a schematic plan view showing a battery package 1B and a battery module 100B according to the third embodiment. Fig. 24 is a schematic cross-sectional view taken along line XXIV-XXIV in Fig. 23. Fig. 25 is a schematic cross-sectional view taken along line XXV-XXV in Fig. 24. Fig. 26 is a schematic cross-sectional view showing a battery package 1B according to another aspect of the third embodiment.

[0088] As shown in the example of FIGS. 23 to 25, a battery module 100B according to the third embodiment includes a battery package 1B according to the third embodiment and a battery 200 mounted in the battery package 1B. The battery package 1B according to the third embodiment has the same configuration as the battery package 1A according to the second embodiment, except for some components. The following describes the configuration of the battery package 1B according to the third embodiment that differs from the battery package 1A according to the second embodiment. For ease of explanation, the same reference numerals are used to designate components that have the same functions as those described in the first and second embodiments.

[0089] As shown in the examples of FIGS. 23 to 25 , the insulating frame 31 may have four inner corner portions 31C on its inner surface. The four inner corner portions 31C may be arranged rotationally symmetrically with respect to the center of the insulating frame 31. Furthermore, the recess 21 of the insulating substrate 2 may have a plurality of recessed steps 21d as receiving portions, and the plurality of recessed steps 21d may be located on the inner surface of the recess 21 of the insulating substrate 2. The plurality of recessed steps 21d may be arranged rotationally symmetrically with respect to the center of the recess 21 of the insulating substrate 2. In the third embodiment, the number of recessed steps 21d is two, but it may be three or more. Instead of having the plurality of recessed steps 21d, the inner surface of the recess 21 of the insulating substrate 2 may have an annular recessed step.

[0090] As shown in the examples in FIGS. 23 and 25 , each locking piece 83 of the conductive metal plate 8 may be locked onto each recessed step 21d of the insulating substrate 2 from below. The insulating substrate 2 may also have a second notch 22 above each recessed step 21d. The multiple second notches 22 may be arranged rotationally symmetrically with respect to the center of the recess 21 of the insulating substrate 2. A portion of each locking piece 83 of the conductive metal plate 8 may overlap with the second notch 22 of the insulating substrate 2 in a plan view. In the battery package 1B, the second notch 22 may be omitted from the configuration of the insulating substrate 2. The insulating substrate 2 having the recess 21 and the multiple second notches 22 is formed by punching a ceramic green sheet for an insulating layer.

[0091] In the battery package 1B, each locking piece 83 of the conductive metal plate 8 is locked from below into the corresponding recessed step 21d of the recess 21 of the insulating substrate 2, and the elastic force of the conductive metal plate 8 presses the battery 200 against the bottom side of the recess 21 of the insulating substrate 2. This allows the battery 200 to be mechanically fixed to the bottom of the recess 21 of the insulating substrate 2.

[0092] figure 25 As shown in the example, the battery package 1B may omit the insulating frame 31 and the metal frame 33 from the configuration of the frame portion 3. In this case, the battery package 1B and the battery module 100B can be made thinner.

[0093] As shown in the example of FIG. 26, the battery package 1B may include a cap-shaped lid 9B that closes the opening of the frame 3. The lid 9B may be bonded to the frame-shaped metal film 32 that forms the frame 3. The lid 9B may be electrically insulated from the conductive metal plate 8. The lid 9B is made of a metal with a thermal expansion coefficient that is small compared to that of ceramics, such as an iron-nickel (Fe-Ni) alloy or an iron-nickel-cobalt (Fe-Ni-Co) alloy. The lid 9B may be made of ceramics instead of metal. When the lid 9B is made of metal, it can be produced by pressing a metal plate. When the lid 9B is made of ceramics, it may be produced by firing a laminate of ceramic green sheets, as with the insulating substrate 2, or by pressing ceramic powder into a cap shape and firing the resulting product.

[0094] As shown in the examples of FIGS. 23 to 25, a battery module 100B according to the third embodiment includes a battery package 1B according to the third embodiment and a battery 200 housed in a recess 21 in an insulating substrate 2 of the battery package 1B. The lower electrode 210 of the battery 200 may be electrically connected to the first electrode 6. The upper electrode 220 of the battery 200 may be electrically connected to a conductive metal plate 8. Because the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1B and the battery module 100B can be surface-mounted on a mounting board. In FIGS. 24 and 26, only the outline of the battery 200 is shown by a two-dot chain line.

[0095] In the battery package 1B and battery module 100B according to the third embodiment, the second electrode 7, which is a metallized pad, is located between the recess 21 on the surface including the first surface 2a of the insulating substrate 2 and the frame 3 in a plan view of the first surface 2a of the insulating substrate 2. Therefore, during the manufacturing stage of the battery module 100B, the second electrode 7 is in a position that is visible externally, making it easy to check the finished state of the battery package 1B. Specifically, it is easy to check the surface state of the second electrode 7 (including checking for defects during printing) and measure the plating thickness.

[0096] Furthermore, in the battery package 1B and the battery module 100B, the conductive metal plate 8 has a plurality of connection pieces 82 on its periphery as connection parts that electrically connect from above to the second electrode 7. Therefore, during the manufacturing stage of the battery module 100B, the connection state between the second electrode 7, which is a metallized pad, and the connection pieces 82 of the conductive metal plate 8 can be easily visually confirmed.

[0097] Therefore, according to the third embodiment of the present disclosure, in the manufacturing stage of the battery module 100B, it is possible to easily visually determine whether the battery module 100B is a good product or a defective product, eliminating the concern that defective products will be accidentally released onto the market.

[0098] When a portion of each locking piece 83 overlaps with each second cutout portion 22 of the insulating substrate 2 in a plan view, each locking piece 83 can be easily inserted into and locked into the recessed step portion 31d of the insulating frame body 31 while being elastically deformed. As a result, according to the third embodiment of the present disclosure, the assembly of the battery module 100B can be improved.

[0099] Additionally, according to the third embodiment of the present disclosure, the same effects as those of the second embodiment of the present disclosure are achieved.

[0100] [Fourth embodiment] A battery package 1C and a battery module 100C according to a fourth embodiment will be described with reference to Fig. 27 to Fig. 29. Fig. 27 is a schematic plan view showing a battery package 1C and a battery module 100C according to the fourth embodiment. Fig. 28 is a schematic cross-sectional view taken along line XXVIII-XXVIII in Fig. 27. Fig. 29 is a schematic cross-sectional view taken along line XXIX-XXIX in Fig. 27.

[0101] As shown in the example of FIGS. 27 to 29, a battery module 100C according to the fourth embodiment includes a battery package 1C according to the fourth embodiment and a battery 200 mounted in the battery package 1C. The battery package 1C according to the fourth embodiment has the same configuration as the battery package 1B according to the third embodiment, except for some components. The following describes the configuration of the battery package 1C according to the fourth embodiment that differs from the battery package 1B according to the third embodiment. For ease of explanation, the same reference numerals are used to designate components that have the same functions as those described in the first to third embodiments.

[0102] As in the examples shown in Figures 27 to 29, the battery package 1C may include a conductive metal plate 8C that uses elastic force to press the battery 200 against the bottom side of the recess 21 of the insulating substrate 2. The conductive metal plate 8C may be located on the opening side of the recess 21 of the insulating substrate 2. The conductive metal plate 8C may be located inside the insulating frame 31. The conductive metal plate 8C may have a rectangular shape in a plan view. The conductive metal plate 8C may be located on the upper electrode of the battery 200. 220 The metal plate body 81C may be electrically connected to the

[0103] The metal plate main body 81C may be sized to substantially cover the opening of the recess 21 of the insulating substrate 2. In other words, the metal plate main body 81C may be sized to cover the upper electrode 220 of the battery 200 housed in the recess 21 of the insulating substrate 2. The metal plate main body 81C may be connected to the second electrode 7 in a state where it covers 50% or more of the opening area of ​​the recess 21 of the insulating substrate 2.

[0104] As shown in the examples of FIGS. 27 and 28, the conductive metal plate 8C may have two connection portions 82C at two corners that are electrically connected to the second electrode 7 from above. The two connection portions 82C may be part of the periphery of the conductive metal plate 8C and may be corners of the rectangular conductive metal plate 8C. The two connection portions 82C may be arranged diagonally relative to the center of the conductive metal plate 8C. The pair of connection portions 82C may be provided on a metal plate main body 81C.

[0105] As shown in the examples of FIGS. 27 and 29, the conductive metal plate 8C may have two locking portions 83C at the remaining two corners thereof that are locked from below into the recessed step portion 21d of the insulating substrate 2. The two locking portions 83C may be part of the periphery of the conductive metal plate 8C and may be corners of the rectangular conductive metal plate 8C. The two locking portions 83C may be disposed diagonally relative to the center of the conductive metal plate 8C. The pair of locking portions 83C may be provided on a metal plate main body 81C.

[0106] The insulating substrate 2 may have a second cutout 22 above each recessed step 21d. A portion of each locking piece 83C may overlap, in plan view, with the corresponding second cutout 22 of the insulating substrate 2. The battery package 1C may omit the second cutout 22 from the configuration of the insulating substrate 2.

[0107] In the battery package 1C, the latching portions 83C are latched from below into the recessed step portions 21d of the insulating frame 31, and the elastic force of the conductive metal plate 8C presses the battery 200 against the bottom surface of the recess 21 of the insulating substrate 2. This allows the battery 200 to be mechanically fixed to the bottom of the recess 21 of the insulating substrate 2.

[0108] 27 to 29, a battery module 100C according to the fourth embodiment includes a battery package 1C according to the fourth embodiment and a battery 200 housed in a recess 21 of an insulating substrate 2 of the battery package 1C. 210 may be electrically connected to the first electrode 6. The upper electrode 220 of the battery 200 may be electrically connected to the conductive metal plate 8. Because the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1C and the battery module 100C can be surface-mounted on a mounting board. In Figure 28, only the outline of the battery 200 is shown by a two-dot chain line.

[0109] In the battery package 1C and battery module 100C according to the fourth embodiment, the second electrode 7, which is a metallized pad, is located between the recess 21 on the surface including the first surface 2a of the insulating substrate 2 and the frame 3 in a plan view of the first surface 2a of the insulating substrate 2. Therefore, during the manufacturing stage of the battery module 100C, the second electrode 7 is in a position that is visible externally, making it easy to check the finished state of the battery package 1C. Specifically, it is easy to check the surface state of the second electrode 7 (including checking for defects during printing) and measure the plating thickness.

[0110] Furthermore, in the battery package 1C and the battery module 100C, the conductive metal plate 8C has a plurality of connection portions 82C at two corners that electrically connect to the second electrode 7 from above. Therefore, during the manufacturing stage of the battery module 100C, the connection state between the second electrode 7, which is a metallized pad, and the connection portions 82C can be easily visually confirmed.

[0111] Therefore, according to the fourth embodiment of the present disclosure, in the manufacturing stage of the battery module 100C, it is possible to easily visually determine whether the battery module 100C is a good product or a defective product, eliminating the concern that defective products will be accidentally released onto the market.

[0112] When a part of each locking portion 83C overlaps with each second cutout portion 22 of the insulating substrate 2 in a plan view, each locking portion 83C can be easily inserted into and locked into the recessed step portion 21d of the insulating substrate 2 while being elastically deformed. As a result, according to the fourth embodiment of the present disclosure, the assembly of the battery module 100B can be improved.

[0113] Additionally, according to the fourth embodiment of the present disclosure, the same effects as those of the second embodiment of the present disclosure are achieved.

[0114] Fifth Embodiment A battery package 1D and a battery module 100D according to the fifth embodiment will be described with reference to Fig. 30 to Fig. 32. Fig. 30 is a schematic plan view showing a battery package 1D and a battery module 100D according to the fifth embodiment. Fig. 31 is a schematic cross-sectional view taken along line XXXI-XXXI in Fig. 30. Fig. 32 is a schematic cross-sectional view taken along line XXXII-XXXII in Fig. 30.

[0115] As shown in the example of FIGS. 30 to 32, a battery module 100D according to the fifth embodiment includes a battery package 1D according to the fifth embodiment and a battery 200 mounted in the battery package 1D. The battery package 1D according to the fifth embodiment has the same configuration as the battery package 1B according to the third embodiment, except for some components. The following describes the configuration of the battery package 1D according to the fifth embodiment that differs from the battery package 1B according to the third embodiment. For ease of explanation, the same reference numerals are used for components that have the same functions as those described in the first to fourth embodiments.

[0116] 30 to 32, instead of the recess 21 of the insulating substrate 2 having multiple recessed steps 21d on its inner surface, multiple fasteners 10 may be located as receiving portions on the edge of the opening side of the recess 21 on the first surface 2a of the insulating substrate 2. The multiple fasteners 10 may be arranged rotationally symmetrically with respect to the center of the recess 21 of the insulating substrate 2. Each fastener 10 may be located between the recess 21 on the first surface 2a of the insulating substrate 2 and a corner portion 3C of the insulating frame 31. When each fastener 10 is joined to the first surface 2a of the insulating substrate 2 with a brazing material, a metal film M having the same configuration as the frame-shaped metal film 32 may be located on the first surface 2a of the insulating substrate 2.

[0117] Each fastener 10 may be open toward the recess 21 side of the insulating substrate 2. The conductive metal plate 8 may have a plurality of locking pieces 83 on its periphery as locking portions that are locked onto the fasteners 10 from below.

[0118] In the battery package 1D, the locking pieces 83 of the conductive metal plate 8 are locked from below by the fasteners 10, and the elastic force of the conductive metal plate 8 presses the battery 200 against the bottom of the recess 21 of the insulating substrate 2. This allows the battery 200 to be mechanically fixed to the bottom of the recess 21 of the insulating substrate 2.

[0119] As shown in the examples of FIGS. 30 to 32 , a battery module 100D according to the fifth embodiment includes a battery package 1D according to the fifth embodiment and a battery 200 accommodated in a recess 21 in an insulating substrate 2 of the battery package 1D. A bottom electrode 210 of the battery 200 may be electrically connected to the first electrode 6. An top electrode 220 of the battery 200 may be electrically connected to a conductive metal plate 8. Because the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1D and battery module 100D can be surface-mounted on a mounting board.

[0120] In the battery package 1D and battery module 100D according to the fifth embodiment, the second electrode 7, which is a metallized pad, is located between the recess 21 on the surface including the first surface 2a of the insulating substrate 2 and the frame 3 in a plan view of the first surface 2a of the insulating substrate 2. Therefore, during the manufacturing stage of the battery module 100D, the second electrode 7 is in a position that is visible externally, making it easy to check the finished state of the battery package 1D. Specifically, it is easy to check the surface state of the second electrode 7 (including checking for defects during printing) and measure the plating thickness.

[0121] Furthermore, in the battery package 1D and the battery module 100D, the conductive metal plate 8 has a plurality of connection pieces 82 on its periphery as connection portions that electrically connect to the second electrode 7 from above. Therefore, during the manufacturing stage of the battery module 100D, the connection state between the second electrode 7, which is a metallized pad, and the conductive metal plate 8 can be easily visually confirmed.

[0122] Therefore, according to the fifth embodiment of the present disclosure, in the manufacturing stage of the battery module 100D, it is possible to easily visually determine whether the battery module 100D is a good product or a defective product, eliminating the concern that defective products will be accidentally released onto the market.

[0123] Additionally, according to the fifth embodiment of the present disclosure, the same effects as those of the third embodiment of the present disclosure are achieved.

[0124] (Modification 1 of the fifth embodiment) A battery package 1D and a battery module 100D according to a modification of the fifth embodiment will be described with reference to Fig. 33 to Fig. 35. Fig. 33 is a schematic plan view showing a battery package 1D and a battery module 100D according to a modification of the fifth embodiment. Fig. 34 is a schematic plan view showing the state before the locking piece 83 is inserted into the clasp 10. Fig. 35 is a schematic cross-sectional view taken along line XXXV-XXXV in Fig. 34.

[0125] As shown in the example of FIGS. 33 to 35, in a battery package 1D according to a modification of the fifth embodiment, each fastener 10 may be open to the side and to the recess 21 side of the insulating substrate 2.

[0126] According to the battery package 1D of the modified fifth embodiment, simply by rotating the conductive metal plate 8 in one direction (the direction of the arrow in FIG. 34), each locking piece 83 can be inserted into each fastener 10 from the side, and each locking piece 83 can be easily locked from below to each fastener 10. As a result, according to the modified fifth embodiment of the present disclosure, the assembly (manufacturability) of the battery module 100D can be improved.

[0127] Additionally, the first modification of the second embodiment of the present disclosure also achieves the same effects as the second embodiment described above.

[0128] Other Embodiments The number of batteries 200 housed in the recess 21 of the insulating substrate 2 is not limited to one, but may be multiple.

[0129] A battery control semiconductor element for controlling the battery 200 may be housed in the recess 21 of the insulating substrate 2. The battery control semiconductor element includes a DC / DC converter that supplies a constant power supply voltage, a reset IC that monitors the power supply, and a switch IC that turns the power supply on and off. Electronic components such as a coil and a capacitor may also be housed in the recess 21 of the insulating substrate 2. Such semiconductor elements and electronic components may be housed in a recess separate from the recess 21 that houses the battery 200, for example, in a recess that opens to the second surface 2b of the insulating substrate 2.

[0130] The battery module 100 (100A to 100D) may include a desiccant that absorbs moisture. The desiccant may be located on the underside of the lid 9. The desiccant may be located between the inner surface of the recess 21 of the insulating substrate 2 and the side surface of the battery 200. For example, silica gel or calcium chloride may be used as the desiccant. When the battery module 100 (100A to 100D) includes a desiccant, deterioration of the battery material of the battery 200 due to chemical reactions with moisture can be suppressed.

[0131] In one embodiment, (1) a battery package includes an insulating substrate having a first surface, a second surface opposite the first surface, and a recess that opens to the first surface and is used to accommodate a battery; a frame that surrounds the recess on the first surface; a first external electrode located on the second surface; a second external electrode located on the second surface; a first electrode located on the bottom surface of the recess and electrically connected to the first external electrode; a second electrode located between the recess and the frame on the surface of the insulating substrate in a plan view of the first surface and electrically connected to the second external electrode; a receiving portion located on the frame or the insulating substrate; a connection portion located on the opening side of the recess and electrically connecting to the second electrode from above; and a locking portion that locks to the receiving portion, the conductive metal plate pressing the battery against the bottom surface of the recess by elastic force; and a lid that is electrically insulated from the conductive metal plate and closes the frame.

[0132] (2) In the battery package of (1), the frame may have an insulating frame surrounding the recess on the first surface, and the second electrode may be located inside the insulating frame.

[0133] (3) In the battery package of (1) or (2), the receiving portion may be a plurality of recessed steps or an annular recessed step located on the inner surface of the frame portion, and a portion of the peripheral edge of the conductive metal plate may be engaged with the recessed steps from below as the engaging portion.

[0134] (4) In the battery package of (1) or (2), the receiving portion may be a plurality of recessed steps or an annular recessed step located on the inner surface of the recess, and a portion of the peripheral edge of the conductive metal plate may be engaged with the recessed steps from below as the engaging portion.

[0135] (5) In the battery package of (1) or (2), the receiving portion may be a plurality of recessed steps or an annular recessed step located on the inner surface of the frame portion, and the conductive metal plate may have a plurality of locking pieces on its periphery that are engaged with the recessed steps from below as the locking portion.

[0136] (6) In the battery package of (1) or (2), the receiving portion may be a plurality of recessed steps or an annular recessed step located on the inner surface of the recess, and the conductive metal plate may have a plurality of locking pieces on its periphery that are engaged with the recessed steps from below as the locking portion.

[0137] (7) In the battery packaging of any one of (1) to (6) above, the upper side (top) of the connection portion may be open before the lid body closes the frame portion.

[0138] (8) In any one of (1) to (6) above, the insulating frame may have a first notch on its upper surface that is connected to the recess, and the second electrode may overlap the first notch in a plan view.

[0139] (9) In the battery package according to any one of (1) to (8), the connection portion may extend toward a corner of the frame portion.

[0140] (10) In the battery package according to any one of (1) to (9), the connection portion may have a curved portion that straddles the edge of the recess.

[0141] (11) In the battery package according to any one of (1) to (10), the tip of the connection portion may be bent into an arc.

[0142] (12) In the battery package of (5) above, the frame may have a plurality of second cutouts above the recessed step, and a portion of each locking piece may overlap the second cutout in a plan view.

[0143] (13) In the battery package of (5), the frame portion may have a guide portion above the recessed step portion, and the cross-sectional shape of the guide portion may be stepped or tapered so as to approach the center line of the recess in the downward direction.

[0144] (14) In the battery package of (5), the frame may have a plurality of insertion openings that open to the upper side and the recessed side, and each insertion opening may be connected to the recessed step portion.

[0145] (15) In the battery package of (1) or (2), the receiving portion may be a plurality of fasteners located on the first surface, and the conductive metal plate may have a plurality of fastening pieces on its periphery that are fastened to the fasteners from below as the fastening portion.

[0146] (16) In the battery package of (15) above, each of the clasps may be open to the side and to the recessed portion.

[0147] (17) A battery module includes a battery package according to any one of (1) to (16) above, and a battery housed in the recess of the battery package, the battery having a lower electrode electrically connected to the first electrode and an upper electrode electrically connected to the conductive metal plate.

[0148] (18) In the battery module of (17), the battery may be an all-solid-state battery in which an anode layer, an electrolyte layer, and a cathode layer are stacked.

[0149] (19) In the battery module of (17), the battery may be a coin battery.

[0150] The invention according to the present disclosure has been described above based on the drawings and examples. However, the invention according to the present disclosure is not limited to the above-described embodiments. In other words, the invention according to the present disclosure can be modified in various ways within the scope of the present disclosure, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the invention according to the present disclosure. In other words, it should be noted that a person skilled in the art would easily be able to make various modifications or corrections based on the present disclosure. It should also be noted that these modifications or corrections are included in the scope of the present disclosure. [Explanation of symbols]

[0151] 1 Battery package (battery package according to the first embodiment) 2. Insulating substrate 2a 1st page 2b 2nd side 2c side 21 Recess 3 Frame 31 Insulating frame 31d Recessed portion (receiving portion) 31n First notch 31g Guide part 32 Frame-shaped metal membrane 33 Metal frame 3C corner 4 1st external electrode 5 Second external electrode 6 1st electrode J1 First connection wire 7 Second electrode J2 Second connection wiring 8. Conductive metal plate 81 Metal plate body 82 Connection piece (connection part) 82f curved section 83 Locking piece (locking part) 9 Lid 100 Battery module (battery module according to the first embodiment) 200 batteries 210 Bottom electrode 220 Top electrode 1A Battery package (battery package according to the second embodiment) 31C inner corner 31i insertion slot 100A Battery Module (Battery Module According to Second Embodiment) 1B Battery package (battery package according to the third embodiment) 21d Concave step 22 Second notch 9B Lid 100B Battery module (battery module according to the third embodiment) 1C Battery package (battery package according to the fourth embodiment) 8C conductive metal plate 81C Metal plate body 82C connection part 83C Locking part 100C Battery module (battery module according to the fourth embodiment) 1D Battery Package (Battery Package According to Fifth Embodiment) 10 Stopper plate (receiving part) 100D Battery module (battery module according to the fifth embodiment) J1 First connection wire J2 Second connection wiring

Claims

1. an insulating substrate having a first surface, a second surface opposite to the first surface, and a recessed portion that opens to the first surface and is used to accommodate a battery; a frame portion surrounding the recessed portion on the first surface; a first external electrode located on the second surface; a second external electrode located on the second surface; a first electrode located on a bottom surface of the recess and electrically connected to the first external electrode; a second electrode located between the recess and the frame portion on the surface of the insulating substrate in a plan view of the first surface, and electrically connected to the second external electrode; a receiving portion located on the frame portion or the insulating substrate; a conductive metal plate located on the opening side of the recess, the conductive metal plate having a connection portion electrically connected to the second electrode from above and a locking portion that is locked to the receiving portion, and that presses the battery toward the bottom surface of the recess by elastic force; a lid that is electrically insulated from the conductive metal plate and closes the frame portion.

2. 2. The battery package according to claim 1, wherein the frame portion has an insulating frame surrounding the recess on the first surface, and the second electrode is located inside the insulating frame.

3. 2. The battery package of claim 1, wherein the receiving portion is a plurality of recessed steps or an annular recessed step located on the inner surface of the frame portion, and a portion of the peripheral edge of the conductive metal plate is engaged with the recessed steps from below as the engaging portion.

4. 2. The battery package of claim 1, wherein the receiving portion is a plurality of recessed steps or an annular recessed step located on the inner surface of the recess, and a portion of the peripheral edge of the conductive metal plate is engaged with the recessed steps from below as the engaging portion.

5. 2. The battery package of claim 1, wherein the receiving portion is a plurality of recessed steps or an annular recessed step located on the inner surface of the frame portion, and the conductive metal plate has a plurality of locking pieces on its peripheral edge as the locking portion that are locked to the recessed steps from below.

6. 2. The battery package according to claim 1, wherein the receiving portion is a plurality of recessed steps or an annular recessed step located on the inner surface of the recess, and the conductive metal plate has a plurality of locking pieces on its peripheral edge as the locking portion that are locked to the recessed steps from below.

7. 2. The battery package according to claim 1, wherein an upper side of the connection portion is open before the lid body closes the frame portion.

8. The battery package according to claim 2 , wherein the insulating frame has a first cutout portion on its upper surface that is connected to the recess, and the second electrode overlaps the first cutout portion in a plan view.

9. 2. The battery package according to claim 1, wherein the connection portion extends toward a corner portion of the frame portion.

10. The battery package according to claim 1 , wherein the connecting portion has a curved portion that straddles an edge of the recess.

11. The battery package according to claim 1 , wherein a tip end of the connection portion is bent into an arc shape.

12. The battery package according to claim 5 , wherein the frame portion has a plurality of second cutouts above the recessed step portion, and a portion of each of the locking pieces overlaps with the second cutout in a plan view.

13. 6. The battery package according to claim 5, wherein the frame portion has a guide portion above the recessed step portion, and the cross-sectional shape of the guide portion is stepped or tapered so as to approach the center line of the recess in a downward direction.

14. 6. The battery package according to claim 5, wherein the frame has a plurality of insertion openings that open to an upper side and to the recessed side, and each insertion opening is connected to the recessed step portion.

15. the receiving portion is a plurality of detents located on the first surface; 2. The battery package according to claim 1, wherein the conductive metal plate has a plurality of locking pieces on its periphery as the locking portions, the locking pieces being locked from below by the fasteners.

16. 16. The battery package according to claim 15, wherein each of the clasps is open to a side and to the recessed side.

17. A battery package according to any one of claims 1 to 16; a battery housed in the recess of the battery package, the battery having a lower electrode electrically connected to the first electrode and an upper electrode electrically connected to the conductive metal plate.

18. The battery module according to claim 17 , wherein the battery is an all-solid-state battery in which an anode layer, an electrolyte layer, and a cathode layer are stacked.

19. The battery module of claim 17 , wherein the battery is a coin battery.

Images