Battery package and battery module

Abstract

An electronic module according to this disclosure that achieves a battery module that is less likely to discharge externally includes: an insulating substrate that includes a first surface, a second surface located opposite the first surface, and a recess that is open on the first surface; a first electrode located on the bottom surface of the recess; an electrically conductive elastic member located on the first electrode; and a conductive member that abuts an upper surface electrode of a battery contained in the recess, wherein the insulating substrate includes a fixing part that restricts the conductive member from moving away from the bottom surface of the recess.

Description

[Technical Field]

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

[0002] 2. Description of the Related Art Various types of power supplies or auxiliary power supplies that can be surface-mounted on a mounting board together with electronic circuit components have been proposed as power supplies or auxiliary power supplies for small electronic devices.

[0003] Patent Document 1 discloses an electrochemical cell in which an electrochemical element is housed within a housing space of a sealed container. The sealed container has a base member on which a first current collector is formed, and a lid member fixed to the base member and on which a second current collector is formed, with a housing space being defined between the two members. The electrochemical element has a first electrode (lower electrode) and a second electrode (upper electrode). An elastic member is disposed between the lid member and the second electrode within the housing space, pressing the second electrode toward the first electrode and establishing electrical continuity between the second electrode and the second current collector. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2012-69508 Summary of the Invention

[0005] A battery package according to one embodiment of the present disclosure comprises an insulating substrate having a first surface, a second surface opposite the first surface, and a recess opening to 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 on the insulating substrate and electrically connected to the second external electrode, a conductive elastic member located on the first electrode, and a conductive member that abuts against an upper electrode of a battery housed in the recess and electrically connects the upper electrode to the second electrode, wherein the insulating substrate has a fixing portion that restricts movement of the conductive member in a direction away from the bottom surface of the recess.

[0006] A battery module according to one aspect of the present disclosure includes a battery package according to one aspect of the present disclosure and a battery housed in a recess of the battery package. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view showing the appearance of an example of a battery module according to Embodiment 1. FIG. [Figure 2] FIG. 2 is an exploded perspective view of the battery module of FIG. 1. [Figure 3] 2 is a plan view showing an example of the battery module of FIG. 1 with the lid removed. FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV in FIG. 3. [Figure 5] FIG. 2 is a bottom view showing an example of the battery module of FIG. [Figure 6] 2 is a bottom view of the battery module of FIG. 1 showing a seal pattern formed on a second surface of the insulating substrate. FIG. [Figure 7] FIG. 4 is a cross-sectional view showing an example of an elastic member. [Figure 8] FIG. 2 is a perspective view showing an example of an elastic member. [Figure 9] FIG. 2 is a perspective view showing an example of an elastic member. [Figure 10] FIG. 4 is a cross-sectional view showing an example of an elastic member. [Figure 11] FIG. 2 is a cross-sectional view of the battery module of FIG. 1, showing the state in which a metal frame is provided. [Figure 12] 10 is a plan view showing another state of the locking portion provided on the insulating substrate. FIG. [Figure 13] 10 is a plan view showing another state of the locking portion provided on the insulating substrate. FIG. [Figure 14] FIG. 14 is a cross-sectional view taken along line XIV in FIG. 13. [Figure 15] 2 is a cross-sectional view showing the assembly of the battery module of FIG. 1 having an inclined surface in the locking portion. [Figure 16] 2 is a cross-sectional view showing the assembly of the battery module of FIG. 1 having a stepped surface in the locking portion. [Figure 17] 2 is a plan view showing how the battery module of FIG. 1 is assembled, in which the notches are open to the first surface and the recess on the sides of the locking portion. FIG. [Figure 18] 18 is a cross-sectional view taken along lines XVIII-A and XVIII-B in FIG. 17. [Figure 19] 10 is a cross-sectional view showing another example of engagement between a fixed portion and a locking portion. FIG. [Figure 20] 18 is a cross-sectional view taken along the lines XX-A and XX-B in FIG. 17. [Figure 21] FIG. 1 is a partially enlarged cross-sectional view of a battery module using a thin-film all-solid-state battery as the battery. [Figure 22] FIG. 1 is a partially enlarged cross-sectional view of a battery module using a plurality of thin-film all-solid-state batteries as batteries. [Figure 23] 10 is a plan view showing another example of the battery module according to Embodiment 1 with the lid removed. FIG. [Figure 24] FIG. 24 is a cross-sectional view taken along line XXIV in FIG. 23. [Figure 25] 10 is a plan view showing another example of the battery module according to Embodiment 1 with the lid removed. FIG. [Figure 26] 4 is a cross-sectional view showing another example of the battery module according to the first embodiment. FIG. [Figure 27]4 is a cross-sectional view showing another example of the battery module according to the first embodiment. FIG. [Figure 28] FIG. 10 is a plan view showing an example of a battery module according to a second embodiment with the lid removed. [Figure 29] FIG. 29 is a cross-sectional view taken along line XXIX in FIG. 28. [Figure 30] FIG. 29 is a cross-sectional view taken along the line XXX in FIG. 28. [Figure 31] 10 is a cross-sectional view of the battery module according to Embodiment 2, showing another state of the connection portion of the conductive member. FIG. [Figure 32] 10 is a cross-sectional view of the battery module according to Embodiment 2, showing another state of the connection portion of the conductive member. FIG. [Figure 33] 10 is a cross-sectional view of the battery module according to Embodiment 2, showing another state of the connection portion of the conductive member. FIG. [Figure 34] 10 is a cross-sectional view of the battery module according to Embodiment 2, showing another state of the fixed portion of the conductive member. FIG. [Figure 35] 10 is a cross-sectional view of the battery module according to Embodiment 2, showing another state of the fixed portion of the conductive member. FIG. [Figure 36] 10 is a cross-sectional view of the battery module according to Embodiment 2, showing another state of the fixed portion of the conductive member. FIG. [Figure 37] FIG. 10 is a plan view showing how a battery module according to a second embodiment is assembled, in which notches are open to the first surface and the recess on the sides of the locking portion. [Figure 38] FIG. 38 is a cross-sectional view taken along line XXXVIII in FIG. 37. [Figure 39] FIG. 38 is a cross-sectional view taken along line XXXIX in FIG. 37. [Figure 40] FIG. 10 is a plan view showing another example of a battery module according to Embodiment 2 with the lid removed. [Figure 41] FIG. 41 is a cross-sectional view taken along line XLI in FIG. 40. [Figure 42] FIG. 41 is a cross-sectional view taken along line XLII in FIG. 40. [Figure 43]FIG. 10 is a plan view showing another example of a battery module according to Embodiment 2 with the lid removed. [Figure 44] FIG. 44 is a cross-sectional view taken along line XLIV in FIG. 43. [Figure 45] 10 is a cross-sectional view showing another example of a battery module according to the second embodiment. FIG. [Figure 46] FIG. 10 is a plan view showing another example of a battery module according to Embodiment 2 with the lid removed. [Figure 47] FIG. 47 is a cross-sectional view taken along line XLVII in FIG. 46. [Figure 48] FIG. 47 is a cross-sectional view taken along line XLVIII in FIG. 46. [Figure 49] FIG. 10 is a plan view showing an example of a battery module according to a third embodiment with the lid removed. [Figure 50] FIG. 50 is a cross-sectional view taken along line L in FIG. 49. [Figure 51] FIG. 10 is a cross-sectional view of a battery module according to a third embodiment having a metal frame. DETAILED DESCRIPTION OF THE INVENTION

[0008] In the electrochemical cell disclosed in Patent Document 1, the upper electrode of the electrochemical element is electrically connected to the lid member by the elastic member between the lid member and the second electrode, resulting in electrical conduction with the outside at the lid member.

[0009] According to one aspect of the present disclosure, a battery module can be realized in which discharge to the outside is unlikely to occur from members other than the external electrodes.

[0010] A battery package and a battery module according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. In the following description, the lid side of the battery package and the first surface side of the insulating substrate may be referred to as the upper side, and the insulating substrate side of the battery package and the second surface side of the insulating substrate may be referred to as the lower side. The up-down direction may also be referred to as the height direction (thickness direction). This distinction between up and down is for convenience and does not limit the up-down direction when the battery module, etc. is actually used.

[0011] [Embodiment 1] An embodiment of the present disclosure will be described in detail below with reference to Figures 1 to 26. Battery modules 500A, 500A1 to 500A9 described in embodiment 1 are an example of a battery module 500 according to the present disclosure. Also, battery packages 100A, 100A1 to 100A9 described in embodiment 1 are an example of a battery package 100 according to the present disclosure.

[0012] FIG. 1 is a perspective view showing the appearance of an example of a battery module 500A according to embodiment 1. FIG. 2 is an exploded perspective view of the battery module of FIG. 1. FIG. 3 is a plan view showing an example of the battery module of FIG. 1 with the lid removed. FIG. 4 is a cross-sectional view taken along line IV in FIG. 3. FIG. 5 is a bottom view showing an example of the battery module of FIG. 1. In the perspective view, each plan view, and bottom view, some of the first electrodes and the like are shaded in a dot pattern to make them easily distinguishable from others.

[0013] As shown in FIGS. 1 to 5, the battery module 500A includes a battery package 100A and one or more batteries 200 housed in a recess 113 of the battery package 100A.

[0014] As shown in FIGS. 1 to 5, a battery package 100A may include an insulating substrate 110, a conductive elastic member 140, a conductive member 150, and a lid 160.

[0015] The insulating substrate 110 has a first surface 111, a second surface 112 located on the opposite side to the first surface 111, and a recess 113 that opens to the first surface 111. In the battery module 500A, one battery 200 is housed in the recess 113. A plurality of batteries 200 may be housed in the recess 113.

[0016] The insulating substrate 110 may be made of an insulating inorganic material. Examples of insulating inorganic materials include ceramics such as aluminum oxide sintered body (alumina ceramics), aluminum nitride sintered body, mullite sintered body, and glass ceramic sintered body. The insulating substrate 110 may be made of a single insulating layer or multiple laminated insulating layers. The insulating layer is made of an insulating material such as aluminum oxide sintered body, glass ceramic sintered body, mullite sintered body, or aluminum nitride sintered body.

[0017] When the insulating layer is made of, for example, an aluminum oxide sintered body, insulating substrate 110 is produced as follows. That is, first, ceramic green sheets that will become the insulating layers are produced. Raw material powders such as aluminum oxide and silicon oxide are formed into sheets together with an appropriate organic binder and organic solvent to produce multiple rectangular ceramic green sheets. Next, these ceramic green sheets are stacked to produce a laminate. Recess 113 and second recess 114 are formed by forming through holes in the ceramic green sheets using a mold or the like. Thereafter, the laminate is fired at a temperature of 1300 to 1600°C to produce insulating substrate 110.

[0018] The dimensions of insulating substrate 110 are, for example, a rectangular side length of 1 mm to 20 mm, and a thickness of insulating substrate 110 of 0.5 mm to 5 mm. The dimensions of recess 113 of insulating substrate 110 can be set according to the size of battery 200.

[0019] 2 and 4, the size of the recess 113 in a plan view is slightly larger than the size of the battery 200 in a plan view. The inner wall surface of the recess 113 may be parallel to the thickness direction of the insulating substrate 110. The depth of the recess 113 is larger than the height of the battery 200 accommodated in the recess 113, the elastic member 140 in a compressed state, and the conductive member 150. The shape of the recess 113 in a plan view is not limited to a circle, and can be changed depending on the shape of the battery 200.

[0020] As shown in FIGS. 2 to 5, the insulating substrate 110 has a second recess 114 that opens to the inner wall surface of the recess 113. Specifically, as shown in FIGS. 2 to 5, the insulating substrate 110 may have two second recesses 114. The two second recesses 114 may be opposed to each other with the recess 113 in between. The number of second recesses 114 is not limited to two, and a plurality of second recesses 114 may be formed along the inner periphery of the recess 113. Alternatively, the second recess 114 may be a single recess formed over the entire inner periphery of the recess 113. In other words, the second recess 114 may be a groove formed over the inner periphery of the recess 113.

[0021] The insulating substrate 110 also includes a fixing portion 115. The fixing portion 115 is a component that restricts the movement of the conductive member 150 in a direction away from the bottom surface of the recess 113. With this configuration, the battery 200 housed in the recess 113 is sandwiched between the elastic member 140 and the conductive member 150. In other words, the battery 200 is pressed against the conductive member 150 by the elastic member 140, and the movement of the conductive member 150 is restricted by the fixing portion 115. As a result, the battery 200 is fixed in a state where it is pressed against the conductive member 150. The elastic member 140 can absorb manufacturing errors such as variations in the height of the battery 200 and the depth of the recess 113, as well as expansion and contraction of the battery 200. The elastic member 140 can absorb impacts that occur when assembling the battery module 500 (500A).

[0022] In this embodiment, the insulating substrate 110 includes, for example, a locking portion 115A as the fixing portion 115. The locking portion 115A is a portion of the insulating substrate 110 that is located above the second recess 114. The locking portion 115A has a locking surface 115a that faces the second surface 112. The locking surface 115a can also be said to be the upper surface (ceiling) of the second recess 114. Alternatively, the locking portion 115A may be a protrusion that protrudes from the inner wall surface of the recess 113 toward the center of the recess 113.

[0023] The height from the bottom surface of the recess 113 to the locking surface 115a is smaller than the height of the battery 200 housed in the recess 113, the elastic member 140 in an uncompressed state, and the conductive member 150 stacked together, and is equal to the height of the battery 200, the elastic member 140 in a compressed state, and the conductive member 150 stacked together.

[0024] In this embodiment, as shown in FIGS. 3 to 5, the insulating substrate 110 has two locking portions 115A. The two locking portions 115A face each other with the recess 113 in between. The two locking portions 115A are located at opposite corners of the insulating substrate 110. By arranging the locking portions 115A at opposite positions with the recess 113 in between, the posture of the conductive member 150 can be stabilized. Furthermore, by locating the locking portions 115A at the corners of the insulating substrate 110, it is possible to easily ensure an area for providing the locking portions 115A and further miniaturize the battery module 500A.

[0025] The battery package 100A includes wiring conductors 130 on the surface and inside of an insulating substrate 110. The wiring conductors 130 include a first electrode 131, a second electrode 132, a first connection wiring 133A, a second connection wiring 133B, a first external electrode 134A, and a second external electrode 134B.

[0026] The first electrode 131 is located on the bottom surface of the recess 113 and is electrically connected to the first external electrode 134A by the first connection wiring 133A. The first electrode 131 may cover the entire bottom surface of the recess 113. Alternatively, the first electrode 131 may extend from the bottom surface of the recess 113 to the inside of the insulating substrate 110, as shown in FIG. 4. When the first electrode 131 extends to the inside of the insulating substrate 110, the first connection wiring 133A is located in a thick portion of the insulating substrate 110, which provides excellent strength. The first electrode 131 may be contained within the bottom surface of the recess 113 in a plan view. In other words, the first electrode 131 may not extend to the inside of the insulating substrate 110, and the first connection wiring 133A may penetrate from the bottom surface of the recess 113 to the second surface 112 and connect to the first external electrode 134A. In this case, the path from the battery 200 to the first external electrode 134A is shorter and has lower resistance, so that the efficiency of extracting power from the battery 200 housed in the recess 113 improves.

[0027] The second electrode 132 is located on the insulating substrate 110 and is electrically connected to the second external electrode 134B by the second connection wiring 133B. The second electrode 132 may be located on at least one of the locking surfaces 115a of the insulating substrate 110. The second electrode 132 may extend from the locking surface 115a to the inside of the insulating substrate 110. The second electrode 132 may cover the entire surface of the locking surface 115a. In this embodiment, as shown in FIGS. 3 and 4, the second electrode 132 is located on each of the locking surfaces 115a of the two locking portions 115A of the insulating substrate 110. By providing a plurality of second electrodes 132 in this manner, the probability that at least one of the second electrodes 132 is electrically connected to the conductive member 150 can be increased, thereby improving the reliability of the electrical connection.

[0028] The first external electrode 134A and the second external electrode 134B are each located on the second surface 112 of the insulating substrate 110. The first external electrode 134A and the second external electrode 134B may extend from the second surface 112 of the insulating substrate 110 to the side surfaces (including the corners between the side surfaces).

[0029] Since the first external electrode 134A and the second external electrode 134B are both located on the second surface 112 of the insulating substrate 110, the battery package 100A, in other words, the battery module 500A, can be surface mounted on a mounting board.

[0030] The elastic member 140 may be any member that is elastic and conductive, and may be, for example, a plate spring or a disc spring that is positioned so as to be convex in a direction away from the bottom surface of the recess 113, as shown in FIGS. 2 and 4 . The elastic member 140 is positioned on the first electrode 131, and when one or more batteries 200 are housed in the recess 113, the elastic member 140 is positioned between the first electrode 131 and the bottom electrode 201 of the battery 200. The first electrode 131 and the bottom electrode 201 of the battery 200 housed in the recess 113 are electrically connected via the elastic member 140. Furthermore, when the battery 200 is housed in the recess 113, the elastic member 140 biases the battery 200 in a direction away from the bottom surface of the recess 113.

[0031] The conductive member 150 is a member for electrically connecting the top electrode 202 of the battery 200 and the second electrode 132. The conductive member 150 may be formed, for example, from a metal plate. The conductive member 150 abuts against the top electrode 202 of the battery 200 housed in the recess 113. When two or more batteries are housed in a vertically stacked state in the recess 113, the conductive member 150 abuts against the top electrode 202 of the battery 200 that is farthest from the bottom surface of the recess 113. The material of the conductive member 150 may be a metal. By using a metal, a conductive member 150 with excellent conductivity and durability can be realized.

[0032] As shown in FIGS. 2 to 4, the conductive member 150A includes a main body portion 151 that contacts the upper electrode 202 of the battery 200 and a fixed portion 152 that is fixed to the corresponding locking portion 115A. When the battery module 500A is viewed from above, the main body portion 151 may have a shape that overlaps the battery 200 or is slightly smaller. When two or more batteries are stacked vertically and housed in the recess 113, the main body portion 151 contacts the upper electrode 202 of the battery 200 that is farthest from the bottom surface of the recess 113. The fixed portion 152 is a portion that extends radially outward from the main body portion 151 in a plan view. In a cross-sectional view, the fixed portion 152 may extend linearly from the main body portion 151. Alternatively, the fixed portion 152 may have a curved or bent portion. In either case, the elastic force of the fixed part 152 can be set according to the width, thickness, and shape of the fixed part 152, and the force with which the fixed part 152 is pressed against the second electrode 132 can be adjusted. Also, the force with which the main body part 151 is pressed against the upper electrode 202 of the battery 200 can be adjusted. As a result, the reliability of the electrical connection between the second electrode 132 and the conductive member 150, and between the battery 200 and the conductive member, can be improved.

[0033] The height LM of the elastic member 140 in the compressed state can be set according to the depth of the recess 113, the thickness of the locking portion 115A, the thickness of the conductive member 150, the dimensions (thickness) of the battery, and the like. By appropriately setting the height LM of the elastic member 140 in the compressed state, the fixed portion 152 can be easily locked to the locking portion 115A. As shown in FIG. 4, the height LM of the elastic member 140 in the compressed state is the distance between the bottom surface of the battery 200 and the bottom surface of the peripheral portion of the elastic member 140 (the portion abutting the recess 113). The deformation amount of the elastic member 140 is the difference between the height in the uncompressed state and the height in the compressed state.

[0034] The conductive member 150 is pressed against the locking surface 115a by one or more batteries 200 biased by the elastic member 140, and the upper surface of the conductive member 150 is Second electrode 132 on the locking surface 115aThe second electrode 132 is electrically connected to the upper surface of the conductive member 150 by abutting against the upper electrode 202 of the battery 200. Furthermore, the lower surface of the conductive member 150 abuts against the upper electrode 202 of the battery 200, thereby electrically connecting the conductive member 150 and the battery 200. This electrically connects the upper electrode of the battery 200 to the second electrode 132. The conductive member 150 and the upper electrode 202 may be joined together by, for example, a conductive bonding material. Furthermore, the conductive member 150 may be integrated with the exterior of the battery 200. When two or more batteries are housed in the recess 113, the conductive member 150 may be fixed to the upper electrode 202 of the battery 200 that is farthest from the bottom surface of the recess 113.

[0035] The lid 160 may close the opening of the recess 113. The lid 160 is electrically insulated from the first electrode 131 and the second electrode 132. The lid 160 is made of metal. As shown in FIGS. 2 and 4, a frame-shaped metal film 122 may be positioned on the first surface 111, and the lid 160 may be joined onto the frame-shaped metal film 122. The frame-shaped metal film 122 may be formed on the first surface 111 by metallization. A nickel film may be formed on the surfaces of the frame-shaped metal film 122 and the lid 160 by plating to improve the bondability with a brazing material. The metal lid 160 may be made of a material that has 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.

[0036] By closing the opening of the recess 113 with the lid 160, the space S surrounded by the lid 160 and the insulating substrate 110 is hermetically sealed or vacuum sealed. The lid 160 and the frame-shaped metal film 122 may be joined using a joining material such as a brazing material. In this case, the entire structure is heated by reflow heating. Alternatively, direct seam welding, laser welding, or electron beam welding may be used to join the lid 160 and the frame-shaped metal film 122. These welding methods involve localized heating of the joint, and therefore can achieve hermetically sealing or vacuum sealing at lower temperatures than brazing, which involves heating the entire structure (reflow heating). Sealing at low temperatures reduces the thermal impact on the battery 200, allowing a low-dew-point airtight environment or a low-dew-point vacuum environment to be achieved.

[0037] If the volume of the space S minus the volumes of the batteries 200, conductive members 150, and elastic members 140 located within the space S is defined as the gap volume, the ratio of the gap volume to the volume of the space S may be set to, for example, 5% to 30%. The gap amount between the lid body 160 and the conductive member 150 may be set to, for example, 0.1 mm to 0.8 mm. These settings may be made for the battery module 500A in an initial state where the batteries 200 are not expanded and no external force is applied to the lid body 160. By setting the gap volume ratio or the gap amount in this manner, increases in internal stress and internal pressure of the battery 200 are alleviated when the battery 200 expands due to high temperatures or when gas is generated, thereby improving the durability of the battery 200. Furthermore, even when external stress is applied to the lid body 160, the stress applied to the battery 200 is reduced due to the gap between the lid body 160 and the conductive member 150.

[0038] Alternatively, the space S may be sealed in an atmosphere such as a nitrogen atmosphere, an argon gas atmosphere, or a vacuum, with a dew point of, for example, −20° C. or less. In this case, even if the environmental temperature and humidity rise, chemical reactions between the moisture or oxygen and the battery material are suppressed, improving the heat resistance and lifespan of the battery 200.

[0039] The battery 200 may be a coin battery in which battery materials such as an electrolyte material, a positive electrode, a negative electrode, and a separator are placed in a metal container and sealed. A coin battery is also called a button battery. The battery 200 may be a primary battery or a secondary battery. The battery 200 may also include not only chemical batteries but also power supply elements such as electric double layer capacitors.

[0040] The battery 200 has electrodes (top electrode 202, bottom electrode 201) on its top and bottom surfaces. The top electrode 202 of the battery 200 is a positive electrode or a negative electrode. By housing the battery 200 having electrodes on its top and bottom surfaces in the battery package 100 of the present disclosure, the battery 200 is surface-mounted on a mounting substrate. The internal configuration and materials of the battery 200 are not particularly limited as long as the battery 200 has electrodes on its top and bottom surfaces. For example, the battery 200 may be an all-solid-state battery having a structure in which a solid electrolyte is sandwiched between a positive electrode and a negative electrode. The battery 200 may have current collectors on the outside of the positive electrode and the negative electrode. The battery 200 may be round or cylindrical, rectangular or prismatic, or have any other shape.

[0041] Even if the battery 200 is a coin battery that cannot be surface-mounted on a mounting substrate by itself, it can be surface-mounted on a mounting substrate using the battery package 100A. For example, even if the battery material of the battery 200 is a sulfide-based battery material, by using a sealed coin battery, it can be easily sealed and made into a surface-mount type even without a special working environment such as a dry atmosphere. Furthermore, it can be surface-mounted on a mounting substrate even without a special working environment such as a dry atmosphere, thereby improving the productivity of circuit board devices.

[0042] Furthermore, the battery package 100A allows the coin battery to be hermetically sealed at a higher level than general coin batteries. General coin batteries seal the positive and negative electrodes with a resin material such as a gasket, which can allow moisture to infiltrate from the outside over time and cause deterioration of the battery materials. The hermetic sealing provided by the battery package 100A of the present disclosure can block moisture from entering the coin battery from the outside. Blocking moisture improves the life of the coin battery. In particular, with sulfide-based batteries, there is a concern that moisture infiltrating from the external environment may generate hydrogen sulfide and other substances. Blocking moisture can reduce the generation of hydrogen sulfide and other substances. In the case of coin batteries, the battery material is doubly sealed by the metal container and the battery package 100A, which significantly reduces leakage of sulfide materials from the battery package 100A.

[0043] As described above, in the battery package 100A according to embodiment 1, the elastic member 140 is positioned between the battery 200 and the first electrode 131, and therefore the elastic member 140 is not electrically connected to the lid 160 or the like, and is not electrically connected to the outside of the battery package 100A. This prevents discharge to the outside from members other than the external electrodes, such as the lid 160, and allows power to be efficiently extracted from the battery 200 via the first external electrode 134A and the second external electrode 134B.

[0044] Furthermore, the battery package 100A includes the conductive member 150 and the elastic member 140 that are fixed to the fixing portion, allowing the battery to be fixed without using conductive resin. This allows for a battery module with high long-term reliability to be realized. Furthermore, the elastic member 140 can accommodate variations in the height of the battery or the depth of the recess in the battery package.

[0045] (Another example of the metallized pattern on the second side) FIG. 6 is a bottom view of a battery package 100A1 in which a seal pattern is formed on the second surface of the insulating substrate.

[0046] As in the battery package 100A1 shown in Fig. 6, a seal pattern 136 surrounding the peripheries of the first external electrode 134A and the second external electrode 134B may be located on the second surface 112 of the insulating substrate 110. The seal pattern 136 is made of a conductive material such as a solderable metal. The seal pattern 136 may surround each of the peripheries of the first external electrode 134A and the second external electrode 134B.

[0047] By joining the seal pattern 136 to the pattern of the mounting substrate with solder, the first external electrode 134A and the second external electrode 134B located inside the seal pattern 136 can be sealed. In other words, the battery package 100A1 or the battery module 500A1 can be mounted on the substrate so that neither the first external electrode 134A nor the second external electrode 134B of the battery package 100A1 is exposed to the external environment. Therefore, even if water penetrates the mounting substrate, an electrical short circuit does not occur between the first external electrode 134A and the second external electrode 134B, and no current leakage occurs from the battery module 500A1. Furthermore, sealing by soldering can be performed simultaneously with soldering the first external electrode 134A and the second external electrode 134B to the electrodes of the mounting substrate.

[0048] 5, when the seal pattern 136 is not located on the second surface 112 of the insulating substrate 110, the periphery of the battery module 500A can be sealed with a sealing material such as a resin material. In other words, the battery package 100A or the battery module 500A can be mounted on a substrate so that neither the first external electrode 134A nor the second external electrode 134B of the battery package 100A is exposed to the external environment.

[0049] (Another example of elastic member) 7, 8, 9 and 10 are diagrams showing other examples of the elastic member.

[0050] The elastic member 140 is not limited to the example shown in FIG. 4, and may be, for example, a leaf spring of another shape, a coil spring formed from a metal wire, conductive rubber, or conductive sponge.

[0051] For example, the elastic member 140 may be a leaf spring 140A that is convex toward the bottom surface of the recess 113 as shown in FIG. 7. The leaf spring may be dish-shaped or hat-shaped, and may have a through-hole or slit. The leaf spring may be a plurality of leaf springs formed by dividing a hat-shaped spring. Alternatively, the elastic member 140 may include at least one cantilever spring 140B as shown in FIG. 8, or may include a plurality of cantilever springs as shown in FIG. 24. When using cantilever springs 140B, multiple cantilever springs may be evenly spaced. Alternatively, the elastic member 140 may be a coil spring 140C as shown in FIG. 9.

[0052] 10 , the elastic member 140 may be a plate spring or a disc spring positioned so as to protrude from the lower electrode 201 of the battery 200 toward the bottom surface of the recess 113. Furthermore, the elastic member 140 may be fixed to the lower electrode 201 of the battery 200 and be integrated with the exterior of the battery 200. When two or more batteries are housed in the recess 113, the elastic member 140 may be fixed to the lower electrode 201 of the battery 200 that is closest to the bottom surface of the recess 113.

[0053] Alternatively, the elastic member 140 may be a conductive rubber or a conductive sponge. By using graphene meso sponge (GMS) as the conductive sponge, the elastic member 140 can be realized with excellent conductivity and durability.

[0054] (Example with metal frame) FIG. 11 is a cross-sectional view of a battery module 500A2 including a battery package 100A2 having a metal frame.

[0055] As shown in FIG. 11 , the battery package 100A2 may have a metal frame 123 positioned above the first surface 111. In this case, the metal frame 123 may be joined to the frame-shaped metal film 122 using brazing filler metal, and the lid 160 may be joined to the metal frame 123. The metal frame 123 and the lid 160 may be joined by, for example, seam welding, direct seam welding, laser welding, or electron beam welding. Seam welding, which is resistance welding via the metal frame 123, is particularly advantageous for localized heating of the joint. Although a current is applied to the lid 160 during seam welding, the lid 160 is not electrically connected to the battery 200, so the current during seam welding will not damage the battery 200. Furthermore, the conductive member 150 located between the lid 160 and the battery 200 also reduces the impact of radiant heat from the lid 160 generated during welding on the battery 200.

[0056] To improve the bonding property with brazing material, a nickel film may be formed by plating on the surface of the metal frame 123. The metal frame 123 should preferably be made of a material that has a small difference in thermal expansion with ceramics, such as an iron-nickel (Fe-Ni) alloy or an iron-nickel-cobalt (Fe-Ni-Co) alloy.

[0057] (Another example regarding the locking part) Figures 12 and 13 are plan views of a battery package 100A3 and a battery package 100A4, respectively, which have locking portions different from those of the battery package 100A shown in Figures 1 to 5. They are plan views showing other aspects of the locking portions provided on the insulating substrate. Figure 14 is a cross-sectional view taken along line XIV in Figure 13.

[0058] The direction of the line connecting the two opposing locking portions 115A may be in either direction. For example, as in the battery package 100A3 shown in Figure 12, the locking portion 115A may be located on a side of the insulating substrate 110 instead of on a corner.

[0059] 13 and 14, second recess 114 may open to first surface 111 as if a notch had been made in recess 113. In other words, the edge of the upper surface of second recess 114 is positioned outward from the edge of the lower surface in a plan view. In other words, the inner surface of locking portion 115A is positioned outward from the inner wall surface of recess 113. The opening of the second recess 114 guides the insertion of the fixed portion 152 into the second recess 114, facilitating engagement between the fixed portion 152 and the locking portion 115A.

[0060] (Configuration for facilitating insertion of conductive member 150) Fig. 15 is a cross-sectional view showing the assembly of battery module 500A of Fig. 1 having inclined surfaces on locking portions 115A. Fig. 16 is a cross-sectional view showing the assembly of battery module 500A of Fig. 1 having stepped surfaces on locking portions 115A.

[0061] As shown in FIGS. 15 and 16 , during the assembly process of the battery module 500A, the conductive member 150 is inserted into the recess 113 by being pushed into the recess 113 so as to deform convexly downward. As shown in FIGS. 15 and 16 , the upper surface of the locking portion 115A may be a stepped or inclined surface that approaches the center of the recess 113. In other words, the protrusion of the locking portion 115A may gradually increase from the first surface 111 toward the second surface 112. The inclination angle of the inclined surface approximating this stepped surface may be in the range of 1 to 45 degrees with respect to the thickness direction of the insulating substrate 110. The stepped surface may have one or more steps. Even if there are dimensional errors in the insulating substrate 110, the conductive member 150, or both, the stepped shape or inclined surface allows the fixed portion 152 of the conductive member 150 to be smoothly inserted into the second recess 114.

[0062] Conductive member 150 may have a material or a shape that is easily deformed downwardly convexly, or both. This makes it easy to insert conductive member 150 into recess 113. Conductive member 150 may also have a material or a shape that is difficult to deform upwardly convexly, or both. This makes it difficult for fixed portion 152 of conductive member 150 to disengage from locking portion 115A.

[0063] FIG. 17 is a plan view showing the assembly of the battery module 500A5. The insulating substrate 110 of the battery module 500A5 opens to the first surface 111 and the recess 113 on the side of the locking portion 115A. In other words, the second recess 114 of the battery module 500A5 opens to the first surface 111 on the side of the locking portion 115A. FIG. 18 is a cross-sectional view taken along lines XVIII-A and XVIII-B in FIG. 17. FIG. 19 is a cross-sectional view showing another example of engagement between the fixed portion and the locking portion. FIG. 20 is a cross-sectional view taken along lines XX-A and XX-B in FIG. 17.

[0064] 17 and 18, the second recess 114 of the battery package 100A5 may open to the recess 113 below the locking portion 115A, and may also open to the first surface 111 and the recess 113 on the sides of the locking portion 115A. This configuration guides the insertion of the fixed portion 152 into the second recess 114 and below the locking portion 115A, and makes it easier to fix the conductive member 150.

[0065] 17 and 20, first, fixed portion 152 and main body portion 151 are inserted into second recess 114 and recess 113, respectively, through the opening in first surface 111. Next, conductive member 150 is rotated to move fixed portion 152 below locking portion 115A. To facilitate rotation of conductive member 150, the top surface of main body portion 151 may have irregularities or protrusions.

[0066] 18, the corner of the fixed portion 152 on the front side in the rotation direction may be chamfered to facilitate the movement of the fixed portion 152 below the locking portion 115A. The corner of the locking portion 115A on the side that meets the fixed portion 152 may be chamfered to facilitate the movement of the fixed portion 152 below the locking portion 115A. Also, as shown in FIG. 19, the entirety or the tip of the fixed portion 152 may be angled with the main body portion 151 so that the front side in the rotation direction is lower to facilitate the movement of the fixed portion 152 below the locking portion 115A. The configuration in which the fixed portion 152 is angled with the main body portion 151 further reduces the possibility that the fixed portion 152, once it has advanced below the locking portion 115A due to rotation, will move back. The surface of the fixed portion 152 that comes into contact with the insulating substrate 110 may be rough so that the conductive member 150 is less likely to rotate in the reverse direction due to vibration of the battery package 100 (100A).

[0067] (Another example of a battery) Fig. 21 is a partially enlarged cross-sectional view of a battery module 500A that uses a battery 200X, which is a thin-film all-solid-state battery, as the battery. Fig. 22 is a partially enlarged cross-sectional view of a battery module 500A that uses a plurality of batteries 200X, which are thin-film all-solid-state batteries, as the battery.

[0068] As shown in FIG. 21 , the battery module 500A may include a battery 200X, which is a thin-film all-solid-state battery. The battery 200X has a configuration in which an anode layer 220, an electrolyte layer 230, and a cathode layer 240 are stacked on a metal plate 210, and the metal plate 210 functions as a current collector. The metal plate 210 is made of, for example, copper, aluminum, or stainless steel, and has a thickness of, for example, 0.1 mm to 0.5 mm. The anode layer 220, the electrolyte layer 230, and the cathode layer 240 are formed by, for example, vapor deposition or sputtering. The battery 200X may include a resin cover 250 that covers the end faces of the anode layer 220, the electrolyte layer 230, and the cathode layer 240, and the resin cover 250 is made of insulating resin. The battery module 500A may also include an all-solid-state battery that is not a thin-film type.

[0069] 21 , the metal plate 210 corresponds to the lower electrode 201, and the positive electrode layer 240 corresponds to the upper electrode 202. The negative electrode layer 220, the electrolyte layer 230, and the positive electrode layer 240 are stacked in this order from the lower metal plate 210, but the negative electrode layer 220 and the positive electrode layer 240 may be stacked in reverse. In this case, the negative electrode layer 220 corresponds to the upper electrode 202.

[0070] The positions of the end faces of the anode layer 220, the electrolyte layer 230, and the cathode layer 240 may be misaligned. For example, the anode layer 220, the electrolyte layer 230, and the cathode layer 240 may be stacked in the order of smaller or larger. The electrolyte layer 230 may also be larger than the cathode layer 240 and the anode layer 220. In this case, the possibility of a short circuit between the cathode layer 240 and the anode layer 220 in the lateral direction can be reduced.

[0071] 22, the battery module 500A may include a plurality of batteries 200X. The plurality of batteries 200X may be housed in series in the recess 113 of the battery package 100, stacked vertically. A conductive bonding material may be interposed between the plurality of batteries 200X. The end of the electrolyte layer 230 may cover the end of the negative electrode layer 220. The plurality of batteries 200X can be efficiently manufactured by forming a thin-film battery on a large metal plate and then cutting it into individual pieces of a predetermined size. The plurality of batteries 200X may be connected by contact without using a bonding material. By sandwiching and pressing the plurality of batteries 200X between the elastic member 140 and the conductive member 150, the contact resistance between the plurality of batteries 200X can be reduced.

[0072] Generally, thin-film all-solid-state batteries have high energy density, high safety, and excellent recycle life. In addition, as described above, by using the battery 200X having the metal plate 210 in the battery module 500, mass production of the battery 200X becomes possible, improving the productivity of the battery module 500A. Specifically, after forming the anode layer 220, electrolyte layer 230, and cathode layer 240 on the metal plate 210, the battery 200X is cut out by dicing or the like to a size that matches the recess 113 of the insulating substrate 110, and then placed in the recess 113 of the insulating substrate 110. This improves the productivity of the battery module 500A.

[0073] Furthermore, by using the battery 200X having the metal plate 210 in the battery module 500A, the adhesion between the metal plate 210 and the negative electrode layer 220, the adhesion between the negative electrode layer 220 and the electrolyte layer 230, and the adhesion between the positive electrode layer 240 and the electrolyte layer 230 is improved. This increases the power extraction efficiency of the battery 200X.

[0074] (Another example of a fixed part) In the following, an example will be described in which the fixing portion 115 is a locking metal fitting or a fixing metal film that is fixed or joined to the insulating substrate 110.

[0075] Fig. 23 is a plan view of battery module 500A6 with the lid removed. Fig. 24 is a cross-sectional view taken along line XXIV in Fig. 23. Fig. 25 is a plan view of battery module 500A7 with the lid removed. Fig. 26 is a cross-sectional view of battery module 500A8.

[0076] 23 and 24, the insulating substrate 110 may include, as the fixing portion 115, for example, a locking metal fitting 115B fixed or joined to the insulating substrate 110. Compared to the insulating substrate 110 including the second recess 114, the insulating substrate 110 including the locking metal fitting 115B is easier to manufacture. Furthermore, the strength of the insulating substrate 110 can be improved, and the strength of the fixing portion 115 can be improved. In order to make it difficult for the locking metal fitting 115B and the conductive member 150 to come into contact with the lid 160, the insulating substrate 110 has a first surface 115B. 111and a notch 116 (see FIG. 24) opening into the recess 113, and the locking metal fitting 115B may be bonded onto the bottom surface of the notch 116. The depth of the notch 116 may be greater than the height of the locking metal fitting 115B so that the locking metal fitting 115B and the conductive member 150 are less likely to come into contact with the lid 160. If the depth of the notch 116 is the same as or smaller than the height of the locking metal fitting 115B, a metal frame 123 and / or an insulating frame made of a ceramic material may be positioned between the insulating substrate 110 and the lid 160. In FIG. 23, the bottom surface of the notch 116 is referred to as the first surface. 111 The insulating substrate 110 can be regarded as a first surface, and the portion of the insulating substrate 110 rising outside the notch 116 can be regarded as an insulating frame. 111 The locking metal fitting 115B may be provided on the inside, and an insulating frame body may be provided on the outside thereof.

[0077] The locking fitting 115B may be fixed to the insulating substrate 110 with the conductive member 150 pressed against the battery 200. The locking fitting 115B may be joined to a fixing metal film 115C on the insulating substrate 110. The fixing metal film 115C may also serve as the second electrode 132 (see FIG. 26).

[0078] 25, the locking metal fitting 115B may have openings at the recess 113 and at the side. When the conductive member 150 is rotated, the fixed portion 152 is inserted into the locking metal fitting 115B through the side opening of the locking metal fitting 115B.

[0079] As shown in FIG. 26 , the insulating substrate 110 may include, for example, a fixing metal film 115C as the fixing portion 115. The fixed portion 152 may be joined to the fixing metal film 115C by brazing, soldering, or metal welding using laser irradiation. Compared to the insulating substrate 110 including the second recess 114, the insulating substrate 110 including the fixing metal film 115C is easier to manufacture. Furthermore, the strength of the insulating substrate 110 can be improved, and the strength of the fixing portion 115 can be improved. The fixing metal film 115C may also serve as the second electrode 132. The fixing metal film 115C may be located on the bottom surface of the notch 116 to prevent the conductive member 150 from coming into contact with the lid 160. A frame may be located between the insulating substrate 110 and the lid 160 to prevent the conductive member 150 from coming into contact with the lid 160.

[0080] (Another example of the conductive member 150) FIG. 27 is a cross-sectional view of a battery module 500A9 having a reversible conductive member. As shown in FIG. 27, the conductive member 150 may be a reversible leaf spring having a convex portion in the center that presses the battery 200 from above when the conductive member 150 is inverted. The upper view of FIG. 27 is a cross-sectional view showing the conductive member 150 before inversion, and the lower view of FIG. 27 is a cross-sectional view showing the conductive member 150 after inversion. The conductive member 150 may be inserted into the second recess 114 and the recess 113 with an upwardly convex shape. The conductive member 150 may have an upwardly convex shape before the fixed portion 152 is inserted into the second recess 114. The conductive member 150 may be inverted to a downwardly convex shape during or after insertion. The battery is pressed downward by the main body 151 of the downwardly convex conductive member 150, compressing the elastic member 140. The compressed elastic member 140 presses the battery 200 against the conductive member 150, and the movement of the conductive member 150 is restricted by the fixing portion 115, thereby fixing the battery 200. Depending on the thickness of the conductive member 150 or the reversible protrusion that the conductive member 150 has in its center, the battery package 100A9 can accommodate batteries 200 of various thicknesses and various numbers.

[0081] 17 to 20, the configuration in which conductive member 150 is rotated allows conductive member 150 to rotate easily because conductive member 150 has an upwardly convex shape, so that fixed portion 152 does not come into contact with locking surface 115a while conductive member 150 is rotating. After conductive member 150 is positioned below locking portion 115A, conductive member 150 is inverted to assume a downwardly convex shape, allowing fixed portion 152 to come into contact with locking surface 115a. This contact electrically connects fixed portion 152 to second electrode 132.

[0082] [Embodiment 2] Other embodiments of the present disclosure are described below. For ease of explanation, components having the same functions as those described in the above embodiments are denoted by the same reference numerals, and their description will not be repeated. Battery modules 500B, 500B2 to 500B6 described in embodiment 2 are examples of battery modules 500 according to the present disclosure. Battery packages 100B, 100B2 to 100B6 described in embodiment 2 are examples of battery packages 100 according to the present disclosure.

[0083] Fig. 28 is a plan view showing the battery module 500B with the cover removed. Fig. 29 is a cross-sectional view taken along line XXIX in Fig. 28. Fig. 30 is a cross-sectional view taken along line XXX in Fig. 28.

[0084] As shown in FIGS. 28 to 30, in a battery package 100B according to this embodiment, a conductive member 150 includes a main body portion 151, a connecting portion 153, and a fixed portion 152. The main body portion 151 is a portion that abuts against the upper electrode 202 of the battery 200. The connecting portion 153 is a portion that is electrically connected to the corresponding second electrode 132. The fixed portion 152 is a portion that is fixed to the corresponding fixing portion 115. When the fixing portion 115 is a locking portion 115A, the fixed portion 152 is a portion that is locked to the locking portion 115A.

[0085] The conductive member 150 may have only one connecting portion 153, or two or more connecting portions 153. Two or more connecting portions 153 can improve the reliability of the electrical connection between the second electrode 132 and the conductive member 150. The conductive member 150 may have two or more fixed portions 152. The center of the force pressing the battery 200 may be located on a line segment connecting the two or more fixed portions 152 or within a polygon. The two fixed portions 152 may be located at diagonal corners of the insulating substrate 110.

[0086] In a plan view, connecting portion 153 and fixed portion 152 each extend radially outward from main body portion 151. The elastic force of connecting portion 153 can be set according to the width, thickness, and shape of connecting portion 153, and the force with which connecting portion 153 is pressed against second electrode 132 can be adjusted. The elastic force of fixed portion 152 can be set according to the width, thickness, and shape of fixed portion 152, and the force with which main body portion 151 is pressed against upper electrode 202 of battery 200 can be adjusted. As a result, the reliability of the electrical connection between second electrode 132 and conductive member 150 and between battery 200 and the conductive member can be improved.

[0087] The extension direction of the connecting portion 153 may be different from the extension direction of any of the fixed portions 152 in a plan view. The extension direction of the connecting portion 153 forms an angle with the extension direction of the nearest fixed portion 152 in a plan view. "Forming an angle" means that the angle between the two directions is greater than 0 degrees. Because the connecting portion 153 and the fixed portion 152 are located in different directions relative to the center of the recess 113 in a plan view, the second electrode 132 is disposed in a different direction from the locking portion 115A. When the insulating substrate 110 has a rectangular shape in a plan view and the battery 200 has a circular shape in a plan view, the fixing portion 115 and the second electrode can be disposed in positions where they do not overlap in a plan view.

[0088] 28 to 30 show an example in which a line connecting two opposing connection portions 153 and a line connecting two opposing fixed portions 152 intersect and form an angle. In this case, the two fixing portions 115 and the two second electrodes 132 can be disposed at the four corners of the insulating substrate 110 in a plan view. When the insulating substrate 110 is substantially square in a plan view, the intersection angle is approximately 90°. This allows the battery package 100B to be miniaturized. In the battery package 100B, the insulating substrate 110 has a notch 116 that opens to the first surface 111 and the recess 113, and the second electrode 132 may be located on the bottom surface of the notch 116.

[0089] As shown in FIG. 28, a battery package 100 (100B) may include multiple second electrodes 132 and multiple locking portions 115A. In this case, in a plan view, two second electrodes 132 may be positioned opposite each other across a recess 113, and two locking portions 115A may be positioned opposite each other across the recess 113. Furthermore, a line connecting the two second electrodes 132 and a line connecting the two locking portions 115A may form an angle. This arrangement of the second electrodes 132 and the locking portions 115A stabilizes the pressing and fixing by the elastic member 140 and the conductive member 150. Even if the elastic member 140 rotates and twists around the line connecting the opposing locking portions 115A as a central axis, at least one of the two connecting portions 153 will abut against the second electrode 132. When the battery package 100 (100B) has three or more locking portions 115A, the three or more locking portions 115A may be positioned in line symmetry or rotational symmetry so as to surround the recess 113.

[0090] In a cross-sectional view, connecting portion 153 and fixed portion 152 may each extend in a straight line from main body portion 151, or may have a curved or bent portion between the connecting portion with main body portion 151 and the end portion. In Fig. 29, connecting portion 153 has a U-shaped curved portion that is convex upward (toward lid body 160) and a flat portion that abuts against second electrode 132.

[0091] 31, 32, and 33 are cross-sectional views taken along line XXIX of battery module 500B in FIG. 28, showing examples in which connecting portion 153 of conductive member 150 has a different shape. In FIG. 31, connecting portion 153 has a protruding portion that protrudes toward lid body 160 and a flat portion that abuts against second electrode 132.

[0092] 32, connecting portion 153 has a convex portion that convex toward lid body 160, a flat portion that abuts second electrode 132, and an end portion that is curved (rounded) upward. In Fig. 33, connecting portion 153 has a convex portion that convex toward lid body 160 and an end portion that is curved downward. Because the end portion is curved, even if connecting portion 153 comes into contact with insulating substrate 110, conductive member 150 can be smoothly inserted into recess 113.

[0093] As shown in FIGS. 29, 31, 32, and 33, connecting portion 153 has a curved or bent portion, which makes it easy to adjust the elastic force according to the width and shape of connecting portion 153. Furthermore, the shape of the curved or bent portion makes it easy to adjust the force with which connecting portion 153 abuts against second electrode 132. Furthermore, connecting portion 153 has a curved or bent portion, which makes it possible for connecting portion 153 to have elasticity in a direction transverse to main body portion 151, i.e., in the radial direction. Furthermore, connecting portion 153 may have elasticity in the thickness direction of main body portion 151. This elasticity makes it possible to absorb dimensional errors in the thickness direction during manufacturing and impacts during assembly.

[0094] Furthermore, by having a curved or bent portion, the connecting portion 153 can accommodate changes in the thickness of the battery 200, such as the thickness of the battery package 100, the depth of the recess 113, or the height from the bottom surface of the recess 113 to the locking surface 115a. In other words, by using a conductive member 150 having a curved or bent portion, a single insulating substrate 110 and elastic member 140 can accommodate batteries of different thicknesses. As a specific example, by changing the bending direction of the bent portion, the range of thicknesses of the battery 200 that can be accommodated can be changed. For example, if the bent portion bends upward, it can accommodate thinner batteries, and if it bends downward, it can accommodate thicker batteries.

[0095] 28, 29, 32, and 33, insulating substrate 110 may have a cutout 116 that opens to first surface 111 and recess 113, with second electrode 132 located on the bottom surface of cutout 116. Alternatively, as shown in FIG. 31, second electrode 132 may be located on first surface 111. In either case, second electrode 132 is exposed on the upward-facing surface. In addition, second electrode 132 abuts against and is electrically connected to the lower surface of connection portion 153 of conductive member 150.

[0096] This configuration allows visual confirmation of the appearance of the second electrode 132 and the connection between the conductive member 150 and the second electrode 132. Furthermore, when the second electrode 132 is located on the first surface 111, the second electrode 132 and the frame-shaped metal film 122 can be formed in the same process. For example, the second electrode 132 and the frame-shaped metal film 122 can be formed in the same process by screen printing.

[0097] 34, 35 and 36 show the battery module 500B of FIG. XXX 34 to 36, which are cross-sectional views taken along the arrows, show examples in which fixed portion 152 of conductive member 150 has a different shape. In Figures 34 to 36, conductive member 150 has a bent portion that bends downward at the boundary between main body portion 151 and fixed portion 152 or at fixed portion 152.

[0098] 34, 35, and 36, conductive member 150 may have a curved or bent portion in fixed portion 152, and may have elasticity in a direction transverse to main body portion 151, i.e., in the radial direction. As shown in FIG. 34, fixed portion 152 deforms so as to contract in the radial direction, making it easy to insert conductive member 150 into recess 113. After insertion, fixed portion 152 returns to its original state so as to expand in the radial direction, and fixed portion 152 is locked by locking portion 115A. Conductive member 150 is less likely to shift in the radial direction.

[0099] 35 and 36, the upper surface of locking portion 115A may be a stepped or inclined surface that approaches the center of recess 113. In other words, the protrusion amount of locking portion 115A increases stepwise or gradually from first surface 111 toward second surface 112. The inclination angle of the inclined surface approximating this stepped surface or the inclination angle of this inclined surface may be in the range of 1 degree to 45 degrees with respect to the thickness direction of insulating substrate 110. With this configuration, fixed portion 152 of conductive member 150 can be easily inserted below locking portion 115A.

[0100] Fig. 37 is a plan view showing the assembly of a battery module 500B2. In the battery package 100B2 of the battery module 500B2, the insulating substrate 110 opens to the first surface 111 and the recess 113 on the side of the locking portion 115A. Fig. 38 is a cross-sectional view taken along line XXXVIII in Fig. 37. Fig. 39 is a cross-sectional view taken along line XXXIX in Fig. 37.

[0101] 37 to 39, in the assembly process of battery module 500B2, fixed portion 152 and main body portion 151 are inserted into second recess 114 and recess 113, respectively, through the openings in first surface 111. Thereafter, by rotation of conductive member 150, fixed portion 152 moves below locking portion 115A, and fixed portion 152 can be locked by locking portion 115A. As shown in FIG. 38, fixed portion 152 may have a bent portion that bends upward, and the tip of fixed portion 152 may be located above main body portion 151.

[0102] (Another example) Fig. 40 is a plan view of battery module 500B3 with the lid removed. Fig. 41 is a cross-sectional view taken along line XLI in Fig. 40. Fig. 42 is a cross-sectional view taken along line XLII in Fig. 40. Fig. 43 is a plan view of battery module 500B4 with the lid removed. Fig. 44 is a cross-sectional view taken along line XLIV in Fig. 43. Fig. 45 is a cross-sectional view of battery module 500B5. Fig. 46 is a plan view of battery module 500B6 with the lid removed. Fig. 47 is a cross-sectional view taken along line XLVII in Fig. 46. Fig. 48 is a cross-sectional view taken along line XLVIII in Fig. 46.

[0103] 40, 41, 43, and 44, insulating substrate 110 may include, as fixing portion 115, for example, locking fitting 115B that is fixed or joined to insulating substrate 110. As shown in Fig. 43, locking fitting 115B may have openings in recess 113 and on the side. By rotating conductive member 150, fixed portion 152 is inserted into locking fitting 115B through the side opening of locking fitting 115B.

[0104] 45, the insulating substrate 110 may include, for example, a fixing metal film 115C as the fixing portion 115. The fixed portion 152 may be joined to the fixing metal film 115C by brazing, soldering, or metal welding.

[0105] 46, conductive member 150 may have four connecting portions 153 and four fixed portions 152. However, the present invention is not limited to this, and conductive member 150 may have three or five or more connecting portions 153 and three or five or more fixed portions 152. The number of connecting portions 153 and the number of fixed portions 152 included in one conductive member 150 may differ.

[0106] [Embodiment 3] Other embodiments of the present disclosure are described below. Battery modules 500C and 500C2 described in embodiment 3 are examples of the battery module 500 according to the present disclosure. Battery packages 100C and 100C2 described in embodiment 3 are examples of the battery package 100 according to the present disclosure.

[0107] Fig. 49 is a plan view of battery module 500C with the lid removed. Fig. 50 is a cross-sectional view taken along line L in Fig. 49. Fig. 51 is a cross-sectional view of battery module 500C2. Battery module 500C2 differs from battery module 500C in that it has a metal frame 123.

[0108] As shown in Figures 49, 50, and 51, in a battery package 100C, a connecting portion 153 may at least partially overlap a corresponding fixed portion 152 in a top see-through view. A locking portion 115A is sandwiched between the connecting portion 153 and the corresponding fixed portion 152. This configuration strengthens the fixation of the conductive member 150 to the insulating substrate 110. Because the connecting portion 153 and the fixed portion 152 are positioned in the same direction relative to the center of the recess 113 in a plan view, the second electrode 132 is positioned in the same direction as the locking portion 115A. If the insulating substrate 110 has a rectangular shape in a plan view and the battery 200 has a circular shape in a plan view, the battery package 100 (100C) can be made smaller by positioning the second electrode 132 at a corner of the insulating substrate 110.

[0109] As shown in FIGS. 50 and 51 , the second electrode 132 can be positioned on the upper surface of the locking portion 115A. This allows the second electrode 132 to abut and electrically connect with the lower surface of the connecting portion 153 of the conductive member 150. Furthermore, the appearance of the second electrode 132 and the connection between the conductive member 150 and the second electrode 132 can be visually confirmed. Furthermore, as in the example shown in FIGS. 15 and 16 , the fixed portion 152 is inserted into the second recess 114 by pushing the conductive member 150 in. Alternatively, as in the example shown in FIGS. 17 and 18 , the fixed portion 152 may be inserted into the second recess 114 by rotating the conductive member 150.

[0110] As shown in FIG. 50, the insulating substrate 110 has a first surface 150a and a second surface 150b of the insulating substrate 110. 111 51 , a metal frame 123 and / or an insulating frame may be located between the insulating substrate 110 and the lid 160 so that the conductive member 150 is less likely to come into contact with the lid 160.

[0111] 〔summary〕 A first aspect of the present disclosure is a battery package comprising an insulating substrate having a first surface, a second surface opposite the first surface, and a recess opening to 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 on the insulating substrate and electrically connected to the second external electrode, a conductive elastic member located on the first electrode, and a conductive member that abuts against an upper surface electrode of a battery housed in the recess and electrically connects the upper surface electrode and the second electrode, wherein the insulating substrate has a fixing portion that restricts movement of the conductive member in a direction away from the bottom surface of the recess.

[0112] A second aspect of the present disclosure is the battery package according to the first aspect, wherein the second electrode is electrically connected to the upper surface of the conductive member.

[0113] Aspect 3 of the present disclosure is a battery package described in aspect 1 or 2 above, in which the conductive member comprises a main body portion that abuts the upper electrode of the battery, a connection portion that extends outward from the main body portion in a planar view and is electrically connected to the second electrode, and a fixed portion that extends outward from the main body portion in a planar view and is fixed to the fixing portion.

[0114] A fourth aspect of the present disclosure is the battery package according to the third aspect, wherein the extending direction of the connecting portion and the extending direction of the fixed portion form an angle.

[0115] A fifth aspect of the present disclosure is the battery package according to the third or fourth aspect, wherein the second electrode is electrically connected to the underside of the connection portion.

[0116] A sixth aspect of the present disclosure is the battery package according to any one of the first to fifth aspects, which includes a plurality of the second electrodes and a plurality of the fixing portions.

[0117] A seventh aspect of the present disclosure is a battery package described in the sixth aspect above, wherein the two second electrodes are positioned opposite each other across the recess, the two fixing portions are positioned opposite each other across the recess, and the line connecting the two second electrodes and the line connecting the two fixing portions form an angle.

[0118] Aspect 8 of the present disclosure is the battery package according to any one of Aspects 1 to 7 above, wherein the fixing portion is a locking portion having a locking surface that faces the second surface.

[0119] A ninth aspect of the present disclosure is a battery package described in the eighth aspect, wherein the upper surface of the engaging portion is a stepped or inclined surface that approaches the center of the recess toward the bottom surface of the recess.

[0120] Aspect 10 of the present disclosure is a battery package described in any one of Aspects 3 to 5 above, or any one of Aspects 6 to 9 above that cites Aspect 3 above, in which the connection portion and the fixed portion overlap when viewed from above.

[0121] Aspect 11 of the present disclosure is a battery package described in aspect 10 above, wherein the second electrode is located on the upper surface of the fixing portion and is electrically connected to the lower surface of the connection portion.

[0122] Aspect 12 of the present disclosure is a battery package described in aspect 8 or 9 above, or any one of aspects 9 to 11 above that cites aspect 8 above, wherein the insulating substrate has a notch that opens into the recess below the engaging portion and opens into the first surface and the recess on the side of the engaging portion.

[0123] Aspect 13 of the present disclosure is a battery package described in any one of Aspects 3 to 5 above, or any one of Aspects 6 to 12 above that cites Aspect 3 above, wherein the fixed portion and / or the connection portion have a curved or bent portion and are elastic in a direction crossing the main body portion.

[0124] In a fourteenth aspect of the present disclosure, the conductive member is a leaf spring having a protrusion in the center that presses the battery from above when the battery is turned upside down. The above aspect 14. The battery package according to any one of 1 to 13.

[0125] A fifteenth aspect of the present disclosure is a method for manufacturing a semiconductor device, wherein the fixing portion is a locking metal fitting joined onto the insulating substrate. The above aspect 8. The battery package according to any one of 1 to 7.

[0126] Aspect 16 of the present disclosure is a battery package described in any one of Aspects 3 to 5 above, or any one of Aspects 6 to 7 above that cites Aspect 3 above, wherein the fixed portion in the fixing portion is metal-welded.

[0127] A seventeenth aspect of the present disclosure is a battery module including the battery package according to any one of the first to sixteenth aspects above, and a battery housed in the recess of the battery package.

[0128] Aspect 18 of the present disclosure is the battery module according to aspect 17, wherein the battery is an all-solid-state battery.

[0129] A nineteenth aspect of the present disclosure is the battery module according to the seventeenth aspect, wherein the battery is a thin-film all-solid-state battery in which an anode layer, an electrolyte layer, and a cathode layer are stacked on a metal plate.

[0130] A 20th aspect of the present disclosure is a battery module described in Aspect 17 above, wherein the battery is a coin battery.

[0131] [Additional Notes] 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 can easily 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]

[0132] 100, 100A, 100B, 100C battery packages 110 insulating substrate 111 Page 1 112 Side 2 113 Recess 115 Fixed part 115A Locking part 115a Locking surface 115B Locking hardware 131 1st electrode 132 2nd electrode 134A First external electrode 134B 2nd external electrode 140 Elastic member 150 Conductive material 151 Main body 152 Fixed part 153 Connection 200 batteries 201 Bottom electrode 202 Top electrode 210 Metal plate 220 negative electrode layer 230 Electrolyte layer 240 Positive electrode layer 500, 500A, 500B, 500C battery modules

Claims

1. an insulating substrate having a first surface, a second surface opposite to the first surface, and a recessed portion opening into 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 on the insulating substrate and electrically connected to the second external electrode; a conductive elastic member located on the first electrode; a conductive member that contacts an upper electrode of a battery accommodated in the recess and electrically connects the upper electrode and the second electrode, The insulating substrate has a fixing portion that restricts movement of the conductive member in a direction away from the bottom surface of the recess.

2. The battery package according to claim 1 , wherein the second electrode is electrically connected to the upper surface of the conductive member.

3. The conductive member is a main body portion that abuts against the upper electrode of the battery; a connection portion that extends outward from the main body portion in a plan view and is electrically connected to the second electrode; The battery package according to claim 1 or 2, further comprising: a fixed portion that extends outward from the main body portion in a plan view and is fixed to the fixing portion.

4. The battery package according to claim 3 , wherein the extending direction of the connecting portion and the extending direction of the fixed portion form an angle.

5. The battery package according to claim 3 , wherein the second electrode is electrically connected to the lower surface of the connection portion.

6. The battery package according to claim 1 or 2, comprising a plurality of the second electrodes and a plurality of the fixing portions.

7. The two second electrodes are located at positions facing each other with the recess in between, The two fixing portions are located at positions facing each other with the recessed portion therebetween, The battery package according to claim 6 , wherein a line connecting the two second electrodes and a line connecting the two fixing portions form an angle.

8. 3. The battery package according to claim 1, wherein the fixing portion is a locking portion having a locking surface facing the second surface.

9. 9. The battery package according to claim 8, wherein the upper surface of the locking portion is a stepped or inclined surface that approaches the center of the recess toward the bottom surface of the recess.

10. The battery package according to claim 3 , wherein the connecting portion and the fixed portion overlap each other in a top see-through view.

11. The battery package according to claim 10 , wherein the second electrode is located on an upper surface of the fixing portion and is electrically connected to a lower surface of the connecting portion.

12. 9. The battery package according to claim 8, wherein the insulating substrate has a cutout that opens into the recess below the locking portion and opens into the first surface and the recess on a side of the locking portion.

13. The battery package according to claim 3 , wherein the fixed portion and / or the connecting portion has a curved or bent portion and has elasticity in a direction transverse to the main body portion.

14. 3. The battery package according to claim 1, wherein the conductive member is a leaf spring having a protrusion in the center thereof that presses the battery from above when the spring is turned upside down.

15. 3. The battery package according to claim 1, wherein the fixing portion is a locking metal fitting joined onto the insulating substrate.

16. The battery package according to claim 3 , wherein the fixed portion of the fixing portion is metal-welded to the fixed portion.

17. The battery package according to claim 1 or 2; a battery housed in the recess of the battery package.

18. The battery module according to claim 17 , wherein the battery is an all-solid-state battery.

19. The battery module according to claim 17 , wherein the battery is a thin-film all-solid-state battery in which an anode layer, an electrolyte layer, and a cathode layer are stacked on a metal plate.

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

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