Battery package and battery module

Abstract

The electronic module according to the present disclosure, which realizes a battery module that is less susceptible to discharge to the outside, comprises: an insulating substrate having a first surface, a second surface on the opposite side from the first surface, and a recess opening in the first surface; a first electrode located on the bottom surface of the recess; a conductive elastic member on the first electrode; and a conductive member in contact with an upper surface electrode of the battery accommodated in the recess, the insulating substrate having a fixing portion that restricts the conductive member from moving in a direction 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 Art

[0002] As power sources or auxiliary power sources for small electronic devices, various types of power sources or auxiliary power sources that can be surface-mounted on a mounting substrate together with electronic circuit components have been proposed.

[0003] Patent document 1 discloses an electrochemical cell in which an electrochemical element is contained in a storage space of a sealed container. The sealed container has a base member formed with a first current collector and a cover member fixed to the base member and formed with a second current collector, and a storage space is divided between the two members. The electrochemical element has a first electrode (lower surface electrode) and a second electrode (upper surface electrode). An elastic member is provided between the cover member and the second electrode in the storage space, and the elastic member presses the second electrode toward the first electrode side and conducts the second electrode with the second current collector.

[0004] Prior art literature

[0005] Patent Literature

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

[0007] A battery package according to one embodiment of the present invention comprises: an insulating substrate having a first surface, a second surface located on the side opposite to the first surface, and a recessed portion opened 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 recessed portion 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 abutting against an upper surface electrode of a battery accommodated in the recessed portion and electrically connecting the upper surface electrode to the second electrode, wherein the insulating substrate has a fixing portion, and the fixing portion has a structure that restricts the conductive member from moving in a direction away from the bottom surface of the recessed portion.

[0008] A battery module according to one aspect of the present disclosure has a structure including the battery package according to one aspect of the present disclosure and a battery housed in a recessed portion of the battery package. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a perspective view showing the appearance of an example of the battery module according to the first embodiment.

[0010] Figure 2yes Figure 1 An exploded perspective view of a battery module.

[0011] Figure 3 This indicates that the cover is removed. Figure 1 A top view of an example of a battery module.

[0012] Figure 4 is along Figure 3 A cross-sectional view taken along line IV in FIG.

[0013] Figure 5 Yes means Figure 1 A bottom view of an example of a battery module.

[0014] Figure 6 The figure shows a case where a sealing pattern is formed on the second surface of the insulating substrate. Figure 1 Bottom view of the battery module.

[0015] Figure 7 It is a cross-sectional view showing an example of an elastic member.

[0016] Figure 8 It is a perspective view showing an example of an elastic member.

[0017] Fig. 9 It is a perspective view showing an example of an elastic member.

[0018] Fig.10 It is a cross-sectional view showing an example of an elastic member.

[0019] Fig.11 The case with a metal frame is shown. Figure 1 A cross-sectional view of a battery module.

[0020] Fig.12 It is a plan view showing another state of the locking portion included in the insulating substrate.

[0021] Fig.13 It is a plan view showing another state of the locking portion included in the insulating substrate.

[0022] Fig.14 is along Fig.13 Cross-sectional view along line XIV.

[0023] Fig.15 It means that the assembly has an inclined surface on the locking part. Figure 1 A cross-sectional view of a battery module.

[0024] Fig.16 It means that the step-shaped surface is assembled on the locking part. Figure 1 A cross-sectional view of a battery module.

[0025] Fig.17 It means that the assembly cutout is opened on the first surface and the recessed portion on the side of the locking portion. Figure 1 A top view of the battery module.

[0026] Fig.18 is along Fig.17 Cross-sectional views along line XVIII-A and line XVIII-B.

[0027] Fig.19 It is a cross-sectional view showing another example of engagement between the fixed portion and the locking portion.

[0028] Fig. 20 is along Fig.17 Sectional view along line XX-A and line XX-B.

[0029] Fig.21 This is a partially enlarged cross-sectional view of a battery module using a thin-film all-solid-state battery as a battery.

[0030] Fig. 22 This is a partially enlarged cross-sectional view of a battery module using a plurality of thin-film all-solid batteries as batteries.

[0031] Fig.23 It is a plan view showing another example of the battery module according to the first embodiment with the cover removed.

[0032] Fig.24 is along Fig.23 Sectional view along line XXIV.

[0033] Fig.25 It is a plan view showing another example of the battery module according to the first embodiment with the cover removed.

[0034] Fig.26 This is a cross-sectional view showing another example of the battery module according to the first embodiment.

[0035] Fig. 27 This is a cross-sectional view showing another example of the battery module according to the first embodiment.

[0036] Fig.28 This is a plan view showing an example of the battery module according to the second embodiment with the cover removed.

[0037] Fig.29 is along Fig.28 Sectional view taken along line XXIX.

[0038] Fig.30 is along Fig.28 Sectional view viewed along line XXX.

[0039] Fig.31 It is a cross-sectional view of the battery module according to the second embodiment showing another state of the connection portion of the conductive member.

[0040] Fig.32 It is a cross-sectional view of the battery module according to the second embodiment showing another state of the connection portion of the conductive member.

[0041] Fig.33 It is a cross-sectional view of the battery module according to the second embodiment showing another state of the connection portion of the conductive member.

[0042] Fig.34 It is a cross-sectional view of the battery module according to the second embodiment showing another aspect of the fixed portion of the conductive member.

[0043] Fig.35 It is a cross-sectional view of the battery module according to the second embodiment showing another aspect of the fixed portion of the conductive member.

[0044] Fig.36 It is a cross-sectional view of the battery module according to the second embodiment showing another aspect of the fixed portion of the conductive member.

[0045] Fig.37 This is a plan view showing a state of assembling the battery module according to the second embodiment in which the notch opens on the first surface and the recessed portion on the side of the locking portion.

[0046] Fig.38 is along Fig.37 A cross-sectional view taken along line XXXVIII.

[0047] Fig.39 is along Fig.37 Sectional view along line XXXIX.

[0048] Fig.40 It is a plan view showing another example of the battery module according to the second embodiment in a state where the cover is removed.

[0049] Fig.41 is along Fig.40 Sectional view along line XLI.

[0050] Fig.42 is along Fig.40 A cross-sectional view taken along line XLII.

[0051] Fig.43 It is a plan view showing another example of the battery module according to the second embodiment in a state where the cover is removed.

[0052] Fig.44 is along Fig.43 A cross-sectional view taken along line XLIV.

[0053] Fig.45 This is a cross-sectional view showing another example of the battery module according to the second embodiment.

[0054] Fig.46 It is a plan view showing another example of the battery module according to the second embodiment in a state where the cover is removed.

[0055] Fig.47 is along Fig.46 A cross-sectional view of line XLVII.

[0056] Fig.48 is along Fig.46 A cross-sectional view taken along line XLVIII.

[0057] Fig.49 This is a plan view showing an example of the battery module according to the third embodiment with the cover removed.

[0058] Fig.50 is along Fig.49 A cross-sectional view taken along line L.

[0059] Fig.51 It is a cross-sectional view of a battery module according to Embodiment 3 having a metal casing. DETAILED DESCRIPTION

[0060] In the electrochemical cell disclosed in Patent Document 1, the upper surface electrode of the electrochemical element is electrically connected to the cover member via an elastic member between the cover member and the second electrode, and is electrically connected to the outside in the cover member.

[0061] According to one aspect of the present disclosure, it is possible to realize a battery module in which discharge from members other than external electrodes to the outside is unlikely.

[0062] The battery package and battery module of the embodiment of the present disclosure are described with reference to the accompanying drawings. In the following description, the cover side and the first surface side of the insulating substrate in the battery package are sometimes described as the upper side, and the insulating substrate side and the second surface side of the insulating substrate in the battery package are sometimes described as the lower side. In addition, the up and down direction is sometimes described as the height direction (thickness direction). The distinction between up and down is for convenience and does not limit the up and down when the battery module is actually used.

[0063] [Implementation method 1]

[0064] Below, use Figure 1 to Figure 26One embodiment of the present disclosure will be described in detail. The battery modules 500A and 500A1 to 500A9 described in Embodiment 1 are examples of the battery modules 500 of the present disclosure. The battery packages 100A and 100A1 to 100A9 described in Embodiment 1 are examples of the battery packages 100 of the present disclosure.

[0065] Figure 1 This is a perspective view showing the appearance of an example of a battery module 500A according to the first embodiment.

[0066] Figure 2 yes Figure 1 An exploded perspective view of a battery module. Figure 3 This indicates that the cover is removed. Figure 1 A top view of an example of a battery module. Figure 4 is along Figure 3 A cross-sectional view taken along line IV in FIG. Figure 5 yes Figure 1 In the perspective view, each of the top view and the bottom view, a portion of the first electrode and the like is shaded with dots so as to be easily distinguished from the other portions.

[0067] like Figures 1 to 5 As shown, 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.

[0068] like Figures 1 to 5 As shown, the battery package 100A may include an insulating substrate 110 , a conductive elastic member 140 , a conductive member 150 , and a cover 160 .

[0069] The insulating substrate 110 has a first surface 111, a second surface 112 located opposite to the first surface 111, and a recess 113 opened in the first surface 111. In the battery module 500A, one battery 200 is accommodated in the recess 113. The number of batteries 200 accommodated in the recess 113 may be plural.

[0070] The insulating substrate 110 may be made of an insulating inorganic material. Examples of the insulating inorganic material include ceramics such as an alumina sintered body (alumina ceramics), an aluminum nitride sintered body, a mullite sintered body, or a glass ceramic sintered body. The insulating substrate 110 may be made of a plurality of laminated insulating layers or a single insulating layer. The insulating layer may be made of an insulating material such as an alumina sintered body, a glass ceramic sintered body, a mullite sintered body, or an aluminum nitride sintered body.

[0071] If the insulating layer is composed of, for example, an alumina sintered body, the insulating substrate 110 is manufactured as follows. That is, first, a ceramic green sheet is manufactured as the insulating layer. A plurality of ceramic green sheets in the form of quadrilateral sheets are manufactured by molding raw material powders such as alumina and silicon oxide into sheets together with a suitable organic binder and an organic solvent. Next, a laminate is manufactured by stacking these ceramic green sheets. The recess 113 and the second recess 114 are formed by providing a through hole in the ceramic green sheet using a mold or the like. Thereafter, the insulating substrate 110 is manufactured by firing the laminate at a temperature of 1300 to 1600°C.

[0072] The size of the insulating substrate 110 is, for example, 1 mm to 20 mm for one side of the quadrilateral, and 0.5 mm to 5 mm in thickness. The size of the recess 113 of the insulating substrate 110 can be set according to the size of the battery 200 .

[0073] like Figure 2 and Figure 4 As shown, the size of the concave portion 113 when viewed from above is slightly larger than the size of the battery 200 when viewed from above. The inner wall surface of the concave portion 113 may be parallel to the thickness direction of the insulating substrate 110. The depth of the concave portion 113 is greater than the overlapping height of the battery 200 accommodated in the concave portion 113, the elastic member 140 in a compressed state, and the conductive member 150. The shape of the concave portion 113 when viewed from above is not limited to a circle, and can be changed according to the shape of the battery 200.

[0074] like Figure 2 to Figure 5 As shown in FIG. 1 , the insulating substrate 110 has a second recess 114 opened on the inner wall surface of the recess 113. Specifically, as shown in FIG. Figure 2 to Figure 5 As shown, the insulating substrate 110 may also have two second recesses 114. The two second recesses 114 may also be opposite to each other with the recess 113 interposed therebetween. The number of the second recesses 114 is not limited to two, and a plurality of second recesses 114 may also be formed along the inner circumference of the recess 113. Alternatively, the second recess 114 may also be a recess formed throughout the entire inner circumference of the recess 113. In other words, the second recess 114 may also be a groove formed throughout the inner circumference of the recess 113.

[0075] In addition, the insulating substrate 110 has a fixing portion 115. The fixing portion 115 is a structural element that restricts the conductive member 150 from moving in a direction away from the bottom surface of the recess 113. According to this structure, the battery 200 accommodated 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 conductive member 150 is restricted from moving by the fixing portion 115. As a result, the battery 200 is fixed in a state of being pressed against the conductive member 150. The elastic member 140 can absorb manufacturing errors such as the height deviation of the battery 200 and the depth deviation of the recess 113, as well as the expansion and contraction of the battery 200. The elastic member 140 can mitigate the impact when assembling the battery module 500 (500A).

[0076] In the present embodiment, the insulating substrate 110 has, for example, a stopper 115A as the fixing portion 115. The stopper 115A is a portion of the insulating substrate 110 located above the second recess 114. The stopper 115A has a stopper surface 115a facing opposite to the second surface 112. The stopper surface 115a can also be said to be the upper surface (top plate) of the second recess 114. Alternatively, the stopper 115A can also be a protrusion protruding from the inner wall surface of the recess 113 toward the center of the recess 113.

[0077] The height from the bottom surface of the recess 113 to the stop surface 115a is less than the overlapping height of the battery 200 accommodated in the recess 113, the elastic component 140 in the non-compressed state, and the conductive component 150, and is equal to the overlapping height of the battery 200, the elastic component 140 in the compressed state, and the conductive component 150.

[0078] In this embodiment, if Figure 3 to Figure 5 As shown, the insulating substrate 110 has two stoppers 115A. The two stoppers 115A are opposed to each other with the recess 113 interposed therebetween. In addition, the two stoppers 115A are located at opposite corners of the insulating substrate 110. The stoppers 115A are arranged at opposite positions with the recess 113 interposed therebetween, thereby stabilizing the posture of the conductive member 150. In addition, by locating the stoppers 115A at the corners of the insulating substrate 110, it is possible to easily ensure an area for setting the stoppers 115A, and the battery module 500A can be further miniaturized.

[0079] The battery package 100A has wiring conductors 130 on the surface and inside of the 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.

[0080] The first electrode 131 is located on the bottom surface of the concave portion 113 and is electrically connected to the first external electrode 134A through the first connection wiring 133A. The first electrode 131 may cover the entire bottom surface of the concave portion 113. Figure 4 As shown, the first electrode 131 may also extend from the bottom surface of the recess 113 to the inside of the insulating substrate 110. In the case where the first electrode 131 extends to the inside of the insulating substrate 110, since the first connecting wiring 133A is located in the thicker portion of the insulating substrate 110, it is excellent in strength. The first electrode 131 may also be accommodated in the bottom surface of the recess 113 when viewed from above. In other words, the first electrode 131 may not extend to the inside of the insulating substrate 110, and the first connecting wiring 133A may pass through from the bottom surface of the recess 113 to the second surface 112 and be connected to the first external electrode 134A. In this case, the path from the battery 200 to the first external electrode 134A is shorter, and the resistance becomes lower, so the efficiency of extracting power from the battery 200 accommodated in the recess 113 becomes good.

[0081] The second electrode 132 is located on the insulating substrate 110 and is electrically connected to the second external electrode 134B through the second connection wiring 133B. The second electrode 132 may be located on at least one stop surface 115a of the insulating substrate 110. The second electrode 132 may extend from the stop surface 115a to the inside of the insulating substrate 110. The second electrode 132 may cover the entire surface of the stop surface 115a. In this embodiment, as shown in FIG. Figure 3 and Figure 4 As shown, in the insulating substrate 110, the second electrode 132 is located on the respective stop surfaces 115a of the two stop portions 115A. Thus, by having a plurality of second electrodes 132, the probability of at least one second electrode 132 being electrically connected to the conductive member 150 can be increased, thereby improving the reliability of the electrical connection.

[0082] The first external electrode 134A and the second external electrode 134B are respectively 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).

[0083] Since both the first external electrode 134A and the second external electrode 134B are 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 substrate.

[0084] The elastic member 140 can be any member as long as it has elasticity and conductivity, for example Figure 2 and Figure 4As shown, it may be a leaf spring or a disc spring configured in a manner protruding in a direction away from the bottom surface of the recess 113. The elastic member 140 is located on the first electrode 131, and when more than one battery 200 is accommodated in the recess 113, it is located between the first electrode 131 and the lower surface electrode 201 of the battery 200. The first electrode 131 and the lower surface electrode 201 of the battery 200 accommodated in the recess 113 are electrically connected via the elastic member 140. In addition, when the battery 200 is accommodated in the recess 113, the elastic member 140 applies force to the battery 200 in a direction in which the battery is away from the bottom surface of the recess 113.

[0085] The conductive member 150 is a member for electrically connecting the upper surface electrode 202 of the battery 200 to the second electrode 132. The conductive member 150 can be formed, for example, of a metal plate. The conductive member 150 abuts against the upper surface electrode 202 of the battery 200 accommodated in the recess 113. When two or more batteries are stacked in the recess 113 in the up-down direction, the conductive member 150 abuts against the upper surface electrode 202 of the battery 200 farthest from the bottom surface of the recess 113. The conductive member 150 can be made of metal. By making it made of metal, it is possible to realize a conductive member 150 with excellent conductivity and durability.

[0086] like Figure 2 to Figure 4 As shown, the conductive member 150A has a main body 151 that abuts against the upper surface electrode 202 of the battery 200 and a fixed portion 152 fixed to the corresponding stop portion 115A. When the battery module 500A is viewed from above, the main body 151 may have a shape that overlaps with the battery 200 or is one circle smaller than it. When two or more batteries are stacked in the recess 113 in the up and down direction, the main body 151 abuts against the upper surface electrode 202 of the battery 200 farthest from the bottom surface of the recess 113. The fixed portion 152 is a portion extending outward from the main body 151 in the radial direction when viewed from above. The fixed portion 152 may extend from the main body 151 in a straight line in a cross-sectional view. Alternatively, the fixed portion 152 may also have a curved portion or a bent portion. In any case, the elastic force of the fixed portion 152 can be set according to the width, thickness, and shape of the fixed portion 152, and the force with which the fixed portion 152 is pressed against the second electrode 132 can be adjusted. In addition, the force with which the main body 151 presses the upper surface 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.

[0087] 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 stopper 115A, the thickness of the conductive member 150, and the size (thickness) of the battery. By appropriately setting the height LM of the elastic member 140 in the compressed state, the fixed portion 152 is easily stopped at the stopper 115A. Figure 4 As shown, the height LM of the elastic member 140 in the compressed state is the distance between the lower surface of the battery 200 and the lower surface of the peripheral portion of the elastic member 140 (the portion abutting against the recess 113). The deformation amount of the elastic member 140 is the difference between the height in the non-compressed state and the height in the compressed state.

[0088] The conductive member 150 is pressed against the stop surface 115a by one or more batteries 200 applied by the elastic member 140, and the upper surface of the conductive member 150 abuts against the stop surface 115a of the second electrode 132, thereby the second electrode 132 is electrically connected to the upper surface of the conductive member 150. In addition, the lower surface of the conductive member 150 abuts against the upper surface electrode 202 of the battery 200, so the conductive member 150 is electrically connected to the battery 200. Thus, the upper surface electrode of the battery 200 is electrically connected to the second electrode 132. The conductive member 150 and the upper surface electrode 202 can be bonded, for example, by a conductive bonding material. In addition, the conductive member 150 can also be integrated with the outer packaging of the battery 200. In the case where the recess 113 accommodates more than two batteries, the conductive member 150 can be fixed to the upper surface electrode 202 of the battery 200 farthest from the bottom surface of the recess 113.

[0089] The cover 160 can block the opening of the recess 113. The cover 160 is electrically insulated from the first electrode 131 and the second electrode 132. The cover 160 is made of metal. Figure 2 and Figure 4 As shown, the frame-shaped metal film 122 is located on the first surface 111, and the cover 160 can be bonded to the frame-shaped metal film 122. The frame-shaped metal film 122 can be formed on the first surface 111 by metallization. On the surface of the frame-shaped metal film 122 and the cover 160, a nickel film can be formed by plating to improve the bonding property using solder. As the metal cover 160, a material with a small thermal expansion difference with ceramics can be used, for example, an iron-nickel (Fe-Ni) alloy or an iron-nickel-cobalt (Fe-Ni-Co) alloy can be used.

[0090] The opening of the recess 113 is blocked by the cover 160, so that the space S surrounded by the cover 160 and the insulating substrate 110 is hermetically sealed or vacuum sealed. The cover 160 and the frame-shaped metal film 122 can also be joined using a bonding material such as a solder. In this case, it is performed by overall heating based on reflow heating. Alternatively, direct seam welding, laser welding or electron beam welding can also be used in the joining of the cover 160 and the frame-shaped metal film 122. These welding methods are joined by local heating of the joint, so compared with the case of joining by overall heating (reflow heating), that is, brazing, it is possible to perform hermetic sealing or vacuum sealing at low temperatures. By sealing at low temperatures, the influence of heat on the battery 200 is small, and a low dew point airtight environment or a low dew point vacuum environment can be achieved.

[0091] If the volume obtained by subtracting the volume of the battery 200, the conductive member 150, and the elastic member 140 located in the space S from the volume of the space S is set as the gap volume, the ratio of the gap volume to the volume of the space S can be set to, for example, 5% to 30%. The gap amount between the cover 160 and the conductive member 150 can be set to, for example, 0.1 mm to 0.8 mm. They can be set for the battery module 500A in the initial state where the battery 200 is not expanded and no external force is applied to the cover 160. By setting the gap volume ratio or the gap amount in this way, when the battery 200 becomes high temperature and expands or when gas is generated, the internal stress and internal pressure of the battery 200 are alleviated, and the durability of the battery 200 is improved. In addition, even when stress is applied to the cover 160 from the outside, the stress applied to the battery 200 can be reduced by the gap between the cover 160 and the conductive member 150.

[0092] Alternatively, the space S may be sealed in a nitrogen atmosphere, an argon atmosphere, or a vacuum atmosphere, for example, at a dew point of -20 degrees or less. In this case, even if the ambient temperature and humidity rise, the chemical reaction between moisture or oxygen and the battery raw materials can be suppressed, and the heat resistance and life of the battery 200 are improved.

[0093] The battery 200 may also be a coin cell in which battery raw materials such as electrolyte materials, positive electrodes, negative electrodes, and separators are arranged in a metal container and sealed. A coin cell may also be called a button cell. The battery 200 may be a primary battery or a secondary battery. In addition, the battery 200 includes not only chemical batteries but also power supply elements such as double-layer capacitors and double-layer capacitors.

[0094] The battery 200 has electrodes on the upper surface and the lower surface (upper surface electrode 202, lower surface electrode 201). The upper surface electrode 202 of the battery 200 is a positive electrode or a negative electrode. By accommodating the battery 200 having electrodes on the upper and lower surfaces in the battery package 100 disclosed in the present invention, the surface of the battery 200 is mounted on the mounting substrate. As a battery 200, as long as it has electrodes on the upper and lower surfaces, the internal structure and materials of the battery 200 are not particularly limited. For example, as a battery 200, an all-solid battery having a structure in which a solid dielectric is sandwiched by a positive electrode and a negative electrode can be cited. The battery 200 can have a collector on the outside of the positive electrode and the negative electrode. The battery 200 can be circular or cylindrical, or square or prismatic, or can be other shapes.

[0095] Even when the battery 200 is a coin cell that cannot be surface mounted on a mounting substrate alone, it can be surface mounted on the mounting substrate through 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 cell, it can be easily sealed and made surface mounted even in a special working environment such as a dry atmosphere. In addition, it can be surface mounted on the mounting substrate even in a special working environment such as a dry atmosphere, which can improve the productivity of the circuit substrate device.

[0096] Furthermore, by using the battery package 100A, the coin battery can be hermetically sealed at a higher level than that of a general coin battery. Since the positive and negative electrodes of a general coin battery are sealed with resin materials such as gaskets, moisture will penetrate from the outside over time, which may cause the battery material to deteriorate. The airtight seal of the battery package 100A disclosed in the present invention can block moisture from invading the inside of the coin battery from the outside. By blocking moisture, the life of the coin battery is improved. In particular, in sulfide-based batteries, moisture invading from the external environment may produce hydrogen sulfide, etc. By blocking moisture, the generation of hydrogen sulfide, etc. can be reduced. In the case of a coin battery, since the battery raw materials are double-sealed using a metal container and the battery package 100A, the leakage of sulfide materials from the battery package 100A can be greatly reduced.

[0097] As described above, in the battery package 100A according to the first embodiment, since the elastic member 140 is located between the battery 200 and the first electrode 131, the elastic member 140 is not electrically connected to the cover 160 and the like and is connected to the outside of the battery package 100A. As a result, no discharge is made to the outside from members other than the external electrodes such as the cover 160, so that power can be efficiently extracted from the battery 200 via the first external electrode 134A and the second external electrode 134B.

[0098] In addition, the battery package 100A has a conductive member 150 and an elastic member 140 fixed to the fixing portion, so that the battery can be fixed without using a conductive resin. As a result, a battery module with high long-term reliability can be realized. In addition, by having the elastic member 140, it is possible to absorb the variation in the height of the battery or the variation in the depth of the recessed portion of the battery package.

[0099] (Another example of the metallization pattern of the second surface)

[0100] Figure 6 It is a bottom view of a battery package 100A1 in which a sealing pattern is formed on the second surface of an insulating substrate.

[0101] like Figure 6 As shown in the battery package 100A1, the sealing pattern 136 surrounding the first external electrode 134A and the second external electrode 134B can also be located on the second surface 112 of the insulating substrate 110. The sealing pattern 136 is made of a conductive material such as a weldable metal. The sealing pattern 136 can surround the first external electrode 134A and the second external electrode 134B respectively.

[0102] By joining the sealing pattern 136 to the pattern of the mounting substrate using solder, the first external electrode 134A and the second external electrode 134B located inside the sealing pattern 136 can be sealed. That is, the battery package 100A1 or the battery module 500A1 can be mounted on the substrate in a manner that the first external electrode 134A and the second external electrode 134B of the battery package 100A1 are not exposed to the external environment. Therefore, even if water penetrates into the mounting substrate, an electrical short circuit between the first external electrode 134A and the second external electrode 134B will not occur, and leakage from the battery module 500A1 will not occur. In addition, the sealing based on solder joining can be performed simultaneously with the joining of the first external electrode 134A and the second external electrode 134B to the electrodes of the mounting substrate based on solder.

[0103] like Figure 5 As shown, when the seal pattern 136 is not located on the second surface 112 of the insulating substrate 110, the peripheral portion of the battery module 500A can be sealed by the seal material. In other words, the battery package 100A or the battery module 500A can be mounted on the substrate in a manner that the first external electrode 134A and the second external electrode 134B of the battery package 100A are not exposed to the external environment.

[0104] (Another example of elastic member)

[0105] Figure 7 , Figure 8 , Fig. 9 and Fig.10Each of them is a diagram showing another example of the elastic member.

[0106] The elastic member 140 is not limited to Figure 4 The examples shown may also be leaf springs of other shapes, coil springs formed of metal wires, conductive rubber, or conductive sponges.

[0107] For example, the elastic member 140 may be Figure 7 The leaf spring 140A is shown as protruding toward the bottom surface of the recess 113. The leaf spring may be disc-shaped or cap-shaped, and may be provided with a through hole or a slit. The leaf spring may also be a plurality of leaf springs obtained by dividing a cap-shaped spring. Alternatively, the elastic member 140 may include at least one Figure 8 The structure of the cantilever spring 140B shown in the figure may also include Fig.24 In the case of using the cantilever spring 140B, a plurality of them may be evenly arranged. Alternatively, the elastic member 140 may also be as follows Fig. 9 Coil spring 140C is shown.

[0108] In addition, if Fig.10 As shown, the elastic member 140 may be a leaf spring or a disc spring configured to protrude from the lower surface electrode 201 of the battery 200 toward the bottom surface of the recess 113. In addition, the elastic member 140 may be fixed to the lower surface electrode 201 of the battery 200 and integrated with the outer packaging of the battery 200. In the case where two or more batteries are accommodated in the recess 113, the elastic member 140 may be fixed to the lower surface electrode 201 of the battery 200 closest to the bottom surface of the recess 113.

[0109] Alternatively, the elastic member 140 may be conductive rubber or conductive sponge. By using graphene mesoporous sponge (GMS) as the conductive sponge, the elastic member 140 having excellent conductivity and durability can be realized.

[0110] (Example with metal frame)

[0111] Fig.11 It is a cross-sectional view of a battery module 500A2 including a battery package 100A2 having a metal frame.

[0112] like Fig.11As shown, the battery package 100A2 may have a metal frame 123 located above the first surface 111. In this case, the metal frame 123 may be joined to the frame-shaped metal film 122 by solder, and the cover 160 may be joined to the metal frame 123. The metal frame 123 and the cover 160 are joined, for example, using seam welding, direct seam welding, laser welding or electron beam welding. In particular, seam welding is resistance welding via the metal frame 123, and is advantageous in terms of local heating of the joint. Current is applied to the cover 160 during seam welding, but since the cover 160 is not electrically connected to the battery 200, the battery 200 will not be damaged by the current during seam welding. Moreover, since the conductive member 150 is located between the cover 160 and the battery 200, the effect of the radiant heat from the cover 160 generated during welding on the battery 200 is also reduced.

[0113] A nickel film may be formed by plating on the surface of the metal frame 123 to improve bonding properties using solder. As the metal frame 123, a material having a small thermal expansion difference with ceramics may be used, for example, an iron-nickel (Fe-Ni) alloy or an iron-nickel-cobalt (Fe-Ni-Co) alloy may be used.

[0114] (Another example related to the locking portion)

[0115] Fig.12 and Fig.13 They are respectively Figure 1 to Figure 5 The battery package 100A shown is a plan view of a battery package 100A3 and a battery package 100A4 having different forms of locking portions. Fig.12 and Fig.13 It is a plan view showing another state of the locking portion included in the insulating substrate. Fig.14 is along Fig.13 Cross-sectional view along line XIV.

[0116] The direction of the line connecting the two opposite stopper portions 115A may be any direction. Fig.12 As in the battery package 100A3 shown in the figure, the locking portion 115A may be located at a side portion instead of a corner portion of the insulating substrate 110 .

[0117] In addition, if Fig.13 and Fig.14 As shown, the second recess 114 may also be opened on the first surface 111 in the form of a notch cut out from the recess 113. In other words, in a plan view, the end of the upper surface of the second recess 114 is located outside the end of the lower surface. In other words, the inner side surface of the locking portion 115A is located outside the inner wall surface of the recess 113.

[0118] The opening of the second recess 114 guides the fixed portion 152 to be inserted into the second recess 114 , thereby facilitating the engagement of the fixed portion 152 with the locking portion 115A.

[0119] (Structure that facilitates insertion of the conductive member 150)

[0120] Fig.15 It means that the locking portion 115A has an inclined surface. Figure 1 A cross-sectional view of a battery module 500A. Fig.16 It means that the step-shaped surface assembled in the locking portion 115A is Figure 1 A cross-sectional view of a battery module 500A.

[0121] like Fig.15 and Fig.16 As shown, in the assembly process of the battery module 500A, the conductive member 150 is pressed into the recess 113 in a manner of being deformed convexly in the downward direction, thereby being inserted into the recess 113. Fig.15 and Fig.16 As shown, the upper surface of the locking portion 115A may be a stepped surface or an inclined surface close to the center of the recess 113. In other words, the protrusion of the locking portion 115A may gradually increase from the first surface 111 side toward the second surface 112 side. The inclination angle of the inclined surface obtained by approximating the stepped surface or the inclination angle of the inclined surface relative to the thickness direction of the insulating substrate 110 may be in the range of 1 degree to 45 degrees. The number of levels of the stepped surface may be 1 level or may be 2 or more levels. Even if there is a dimensional error between the insulating substrate 110 or the conductive member 150 or both, the fixed portion 152 of the conductive member 150 can be smoothly inserted into the second recess 114 by the stepped shape or the inclined surface.

[0122] The conductive member 150 may have a material or a shape that is easily deformed to convexly move downward, or both. This makes it easy to insert the conductive member 150 into the recess 113. In addition, the conductive member 150 may have a material or a shape that is difficult to deform to convexly move upward, or both. This makes it difficult for the fixed portion 152 of the conductive member 150 to disengage from the locking portion 115A.

[0123] Fig.17 1 is a top view showing the assembled battery module 500A5. In other words, the insulating substrate 110 of the battery module 500A5 opens on 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 on the first surface 111 on the side of the locking portion 115A. Fig.18 is along Fig.17 Cross-sectional views along line XVIII-A and line XVIII-B. Fig.19 It is a cross-sectional view showing another example of engagement between the fixed portion and the locking portion. Fig. 20 is along Fig.17 Sectional view along line XX-A and line XX-B.

[0124] like Fig.17 and Fig.18 As shown, the second recess 114 of the battery package 100A5 may be opened in the recess 113 below the stopper 115A, and may be opened on the side of the stopper 115A at the first surface 111 and the recess 113. According to this structure, the fixed portion 152 can be guided to be inserted into the second recess 114 and below the stopper 115A, and the conductive member 150 can be easily fixed.

[0125] like Fig.17 and Fig. 20 As shown, first, the fixed portion 152 and the main body 151 are inserted into the second recess 114 and the recess 113 respectively from the opening of the first surface 111. Next, the fixed portion 152 is moved below the stop portion 115A by rotating the conductive member 150. In order to facilitate the rotation of the conductive member 150, a concave-convex or convex portion may be provided on the upper surface of the main body 151.

[0126] In addition, if Fig.18 As shown in FIG. 1 , the corner of the fixed portion 152 on the front side in the rotation direction may also be chamfered so that the fixed portion 152 can be easily moved below the stop portion 115A. The corner of the stop portion 115A on the side that meets the fixed portion 152 may also be chamfered so that the fixed portion 152 can be easily moved below the stop portion 115A. Fig.19 As shown, in order to facilitate the movement of the fixed portion 152 below the stopper 115A, the entire fixed portion 152 or the top end may be angled with the main body 151 in such a way that the front side becomes lower in the rotation direction. The structure in which the fixed portion 152 and the main body 151 are angled can also reduce the possibility of the fixed portion 152 that temporarily enters below the stopper 115A by rotation falling back. The surface of the fixed portion 152 that contacts the insulating substrate 110 may be rough so that the conductive member 150 is not easily reversely rotated due to the vibration of the battery package 100 (100A).

[0127] (Another example of a battery)

[0128] Fig.21 It is a partially enlarged cross-sectional view of a battery module 500A using a battery 200X which is a thin-film all-solid battery as a battery. Fig. 22 It is a partially enlarged cross-sectional view of a battery module 500A using a plurality of thin-film all-solid batteries, namely, batteries 200X as batteries.

[0129] like Fig.21 As shown, the battery module 500A may have a thin-film type all-solid battery, namely a battery 200X. The battery 200X has a structure in which a negative electrode layer 220, an electrolyte layer 230 and a positive electrode layer 240 are stacked on a metal plate 210, and the metal plate 210 has a function as a collector. The metal plate 210 is, for example, a plate of copper, aluminum, stainless steel, etc., and the thickness of the metal plate 210 is, for example, 0.1 mm to 0.5 mm. The negative electrode layer 220, the electrolyte layer 230 and the positive electrode layer 240 are formed, for example, by evaporation or sputtering. The battery 200X may have a resin cover 250 covering the end face of the negative electrode layer 220, the end face of the electrolyte layer 230 and the end face of the positive electrode layer 240, and the resin cover 250 is made of an insulating resin. The battery module 500A may also have a non-thin-film type all-solid battery.

[0130] exist Fig.21 In the case of the battery package 100A of the example shown, the metal plate 210 corresponds to the lower surface electrode 201, and the positive electrode layer 240 corresponds to the upper surface electrode 202. The negative electrode layer 220, the electrolyte layer 230, and the positive electrode layer 240 are stacked in 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 surface electrode 202.

[0131] The position of the end face of the negative electrode layer 220, the position of the end face of the electrolyte layer 230, and the position of the end face of the positive electrode layer 240 may also be staggered. For example, the negative electrode layer 220, the electrolyte layer 230, and the positive electrode layer 240 may be made smaller or larger in the order in which they are stacked. In addition, the electrolyte layer 230 may be made larger than the positive electrode layer 240 and the negative electrode layer 220. In this case, the possibility of a short circuit between the positive electrode layer 240 and the negative electrode layer 220 in the lateral direction can be reduced.

[0132] In addition, if Fig. 22 As shown, the battery module 500A may also have a plurality of batteries 200X. The plurality of batteries 200X may be stacked in series in the up-down direction and accommodated in the recess 113 of the battery package 100. A conductive bonding material may be between the plurality of batteries 200X. The end of the electrolyte layer 230 may cover the end of the negative electrode layer 220. By forming a thin film battery on a larger metal plate and monolithically forming it into a specified size, a plurality of batteries 200X can be efficiently manufactured. The plurality of batteries 200X may also be connected by contact without a bonding material. By clamping 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.

[0133] In general, thin-film all-solid batteries have high energy density, high safety, and excellent cycle life. In addition, as described above, by using the battery module 500 with the battery 200X of the metal plate 210, the battery 200X can be mass-produced and the productivity of the battery module 500A can be improved. Specifically, after the negative electrode layer 220, the electrolyte layer 230, and the positive electrode layer 240 are formed on the metal plate 210, the battery 200X having a size matching the recess 113 of the insulating substrate 110 is cut out by cutting, etc., and installed in the recess 113 of the insulating substrate 110. As a result, the productivity of the battery module 500A is improved.

[0134] In addition, 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 are improved. Therefore, the power extraction efficiency of the battery 200X is improved.

[0135] (Another example of a fixed part)

[0136] Hereinafter, an example in which the fixing portion 115 is a locking metal member or a fixing metal film fixed or bonded to the insulating substrate 110 will be described.

[0137] Fig.23 This is a top view of the battery module 500A6 with the cover removed. Fig.24 is along Fig.23 Sectional view along line XXIV. Fig.25 This is a top view of the battery module 500A7 with the cover removed. Fig.26 It is a cross-sectional view of the battery module 500A8.

[0138] like Fig.23 and Fig.24 As shown, the insulating substrate 110 may have, for example, a locking metal piece 115B fixed or joined to the insulating substrate 110 as the fixing portion 115. Compared with the insulating substrate 110 having the second recess 114, the insulating substrate 110 having the locking metal piece 115B is easier to manufacture. In addition, 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 piece 115B and the conductive member 150 to contact the cover body 160, the insulating substrate 110 may have a cutout 116 (see Fig.24), the locking metal part 115B can be joined to the bottom surface of the cutout 116. The depth of the cutout 116 can also be made greater than the height of the locking metal part 115B, so that the locking metal part 115B and the conductive member 150 are difficult to contact the cover 160. When the depth of the cutout 116 is the same as or smaller than the height of the locking metal part 115B, the metal frame 123 or the insulating frame made of ceramic material or both can be located between the insulating substrate 110 and the cover 160. Fig.23 In the embodiment, the bottom surface of the cutout 116 can be regarded as the first surface 110, and the part of the insulating substrate 110 that stands out from the outside of the cutout 116 can be regarded as the insulating frame. That is, the insulating substrate 110 can also have the locking metal fitting 115B on the first surface 110 and the insulating frame outside it.

[0139] The locking metal member 115B may be fixed to the insulating substrate 110 in a state where the conductive member 150 presses the battery 200. The locking metal member 115B may be bonded to the 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 ).

[0140] like Fig.25 As shown, the locking metal fitting 115B may be opened at the side of the recess 113. When the conductive member 150 is rotated, the fixed portion 152 is inserted into the locking metal fitting 115B from the side opening of the locking metal fitting 115B.

[0141] like Fig.26 As shown, for example, the insulating substrate 110 may have 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, welding, or metal welding based on laser irradiation or the like. The insulating substrate 110 having the fixing metal film 115C is easy to manufacture compared to the insulating substrate 110 having the second recess 114. In addition, 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. In order to make it difficult for the conductive member 150 to contact the cover 160, the fixing metal film 115C may be located on the bottom surface of the cutout 116. In order to make it difficult for the conductive member 150 to contact the cover 160, the frame may be located between the insulating substrate 110 and the cover 160.

[0142] (Another Example of Conductive Member 150)

[0143] Fig. 27 FIG. 5 is a cross-sectional view of a battery module 500A9 in which the conductive member can be flipped. Fig. 27As shown, the conductive member 150 may be a reversible leaf spring having a protrusion at the center thereof that presses the battery 200 from above by being reversed up and down. Fig. 27 The upper figure is a cross-sectional view showing the state of the conductive member 150 before being turned over. Fig. 27 The following figure is a cross-sectional view showing the state of the conductive member 150 after being turned over. The conductive member 150 can be inserted into the second recess 114 and the recess 113 in an upwardly convex shape. The conductive member 150 can be in an upwardly convex shape before the fixed portion is inserted into the second recess 114. During or after the insertion, the conductive member 150 can be turned over to a downwardly convex shape. The main body 151 of the conductive member 150 in a downwardly convex shape presses the battery downward to compress the elastic member 140. The battery 200 is pressed against the conductive member 150 by the compressed elastic member 140, and the movement of the conductive member 150 is restricted by the fixed portion 115, and the battery 200 is fixed. By using the thickness of the conductive member 150 or the reversible convex portion of the conductive member 150 in the central portion, the battery package 100A9 can accommodate the battery 200 in various thicknesses and various numbers.

[0144] In reference Figures 17 to 20 In the structure for rotating the conductive member 150, the conductive member 150 is convex upward during the rotation of the conductive member 150, so that the fixed portion 152 does not abut against the stop surface 115a, and the conductive member 150 is easy to rotate. After the conductive member 150 is located below the stop portion 115A, the conductive member 150 is turned over and becomes convex downward, so that the fixed portion 152 can abut against the stop surface 115a. Through this abutment, the fixed portion 152 is electrically connected to the second electrode 132.

[0145] [Implementation method 2]

[0146] Other embodiments of the present disclosure are described below. For ease of description, components having the same functions as those described in the above embodiments are denoted by the same reference numerals, and their descriptions are not repeated. The battery modules 500B, 500B2 to 500B6 described in Embodiment 2 are examples of the battery modules 500 involved in the present disclosure. In addition, the battery modules 100B, 100B2 to 100B6 described in Embodiment 2 are examples of the battery package 100 involved in the present disclosure.

[0147] Fig.28 It is a plan view showing the battery module 500B in a state where the cover is removed. Fig.29 is along Fig.28 Sectional view taken along line XXIX. Fig.30 is along Fig.28 Sectional view viewed along line XXX.

[0148] like Figures 28 to 30 As shown, in the battery package 100B according to the present embodiment, the conductive member 150 includes a main body 151, a connecting portion 153, and a fixed portion 152. The main body 151 is a portion that contacts the upper surface 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 the locking portion 115A, the fixed portion 152 is a portion that is locked to the locking portion 115A.

[0149] The conductive member 150 may have only one connection portion 153 or may have two or more. The reliability of the electrical connection between the second electrode 132 and the conductive member 150 can be improved by using two or more connection portions 153. 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 opposite corners of the insulating substrate 110.

[0150] In a plan view, the connecting portion 153 and the fixed portion 152 extend radially outward from the main body 151, respectively. The elastic force of the connecting portion 153 can be set according to the width, thickness, and shape of the connecting portion 153, and the force pressing the connecting portion 153 against the second electrode 132 can be adjusted. The elastic force of the fixed portion 152 can be set according to the width, thickness, and shape of the fixed portion 152, and the force pressing the main body 151 against the upper surface 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.

[0151] In a plan view, the extension direction of the connecting portion 153 may also be different from any extension direction of the fixed portion 152. 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 two directions is greater than 0 degrees. In a plan view, the connecting portion 153 and the fixed portion 152 are located in different directions relative to the center of the recess 113, so the second electrode 132 is configured in a different direction from the locking portion 115A. In a case where the top view shape of the insulating substrate 110 is rectangular and the top view shape of the battery 200 is circular, the fixing portion 115 and the second electrode can be configured at a position that does not overlap in a plan view.

[0152] exist Figures 28 to 30, an example is shown in which a line connecting two opposite connecting portions 153 to each other intersects a line connecting two opposite fixed portions 152 to each other to form an angle. In this case, the two fixing portions 115 and the two second electrodes 132 can be respectively arranged at the four corners of the insulating substrate 110 when viewed from above. In the case where the insulating substrate 110 is roughly square when viewed from above, the intersection angle is approximately 90°. Thus, the battery package 100B can be miniaturized. In the battery package 100B, the insulating substrate 110 can have a cutout 116 opening in the first surface 111 and the recess 113, and the second electrode 132 can be located on the bottom surface of the cutout 116.

[0153] like Fig.28 As shown, sometimes the battery package 100 (100B) has a plurality of second electrodes 132 and a plurality of stoppers 115A. In such a case, it is also possible that, in a plan view, the two second electrodes 132 are located at positions opposite to each other with the recess 113 between them, and the two stoppers 115A are located at positions opposite to each other with the recess 113 between them. In addition, the line connecting the two second electrodes 132 to each other and the line connecting the two stoppers 115A can form an angle. By configuring the second electrodes 132 and the stoppers 115A in this way, the pressing fixation based on the elastic member 140 and the conductive member 150 becomes stable. Assume that even if the elastic member 140 is rotated and twisted with the line connecting the opposing stoppers 115A to each other as the center axis, at least one of the two connecting portions 153 is in contact with 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 located at line-symmetrical or rotationally-symmetrical positions so as to surround the recess 113 .

[0154] In cross-sectional view, the connection portion 153 and the fixed portion 152 may extend from the main body 151 in a straight line, or may have a curved portion or a bent portion between the connection portion connected to the main body 151 and the end portion. Fig.29 In the embodiment, the connection portion 153 includes a U-shaped curved portion convex upward (toward the cover body 160 ) and a flat plate portion abutting against the second electrode 132 .

[0155] Fig.31 , Fig.32 and Fig.33 is along Fig.28 The sectional view of the battery module 500B taken along the line XXIX shows an example in which the connection portion 153 of the conductive member 150 has another shape. Fig.31 In the embodiment, the connection portion 153 includes a convex portion that is convex toward the cover 160 and a flat plate portion that abuts against the second electrode 132 .

[0156] exist Fig.32In the embodiment, the connection portion 153 has a convex portion that is convex toward the cover 160, a flat plate portion that contacts the second electrode 132, and an end portion that is bent (rounded) upward. Fig.33 In the embodiment, the connection portion 153 has a convex portion convex toward the cover body 160 and an end portion bent downward. By bending the end portion, even if the connection portion 153 contacts the insulating substrate 110, the conductive member 150 can be smoothly inserted into the recess 113.

[0157] like Fig.29 , Fig.31 , Fig.32 and Fig.33 As shown, the connection portion 153 has a curved portion or a bent portion, so that the elastic force can be easily adjusted according to the width and shape of the connection portion 153. In addition, the shape of the curved portion or the bent portion makes it easy to adjust the force of the connection portion 153 abutting against the second electrode 132. In addition, since the connection portion 153 has a curved portion or a bent portion, it can have elasticity in the direction transverse to the main body 151, that is, in the radial direction. In addition, the connection portion 153 can have elasticity in the thickness direction of the main body 151. Through this elasticity, the dimensional error in the thickness direction during manufacturing and the impact during assembly can be absorbed.

[0158] In addition, by having a curved portion or a bent portion in the connecting portion 153, it is possible to cope with changes in the thickness of the battery 200 relative to 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 stop surface 115a. That is, by using a conductive member 150 having a curved portion or a bent portion, one insulating substrate 110 and an elastic member 140 can cope with batteries of different thicknesses. As a specific example, by changing the bending direction of the bent portion, the range of the thickness of the battery 200 that can be accommodated can be changed. For example, when the bent portion is bent upward, it can cope with thin batteries, and when it is bent downward, it can cope with thick batteries.

[0159] like Fig.28 , Fig.29 , Fig.32 and Fig.33 As shown, the insulating substrate 110 may have a cutout 116 opened at the first surface 111 and the recess 113, and the second electrode 132 may be located at the bottom surface of the cutout 116. Alternatively, as shown in FIG. Fig.31 As shown, the second electrode 132 may be located on the first surface 111. In either case, the second electrode is exposed on the upward surface. In addition, the second electrode 132 abuts against and is electrically connected to the lower surface of the connection portion 153 of the conductive member 150.

[0160] With this structure, the appearance of the second electrode 132 and the connection between the conductive member 150 and the second electrode 132 can be visually confirmed. In addition, 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 using a screen printing method.

[0161] Fig.34 , Fig.35 and Fig.36 is along Fig.28 The sectional view of the battery module 500B taken along the line XXVIII shows an example in which the fixed portion 152 of the conductive member 150 has another shape. Figure 34 to Figure 36 In the embodiment, the conductive member 150 has a bent portion bent downward at a boundary between the main body portion 151 and the fixed portion 152 or at the fixed portion 152 .

[0162] like Fig.34 , Fig.35 , Fig.36 As shown, the conductive member 150 may have a bent portion or a folded portion at the fixed portion 152, and may have elasticity in a direction that crosses the main body 151, that is, in a radial direction. Fig.34 As shown in the figure, the fixed portion 152 is deformed in a manner of contracting in the radial direction, and the conductive member 150 is easily inserted into the recess 113. In addition, after the insertion, the fixed portion 152 returns in a manner of expanding in the radial direction, and the fixed portion 152 is locked in the locking portion 115A. The conductive member 150 is not easily displaced in the radial direction.

[0163] like Fig.35 and Fig.36 As shown, the upper surface of the stopper 115A may be a stepped surface or an inclined surface close to the center of the recess 113. In other words, the protrusion of the stopper 115A increases stepwise or gradually from the first surface 111 side toward the second surface 112 side. The inclination angle of the inclined surface obtained by approximating the stepped surface or the inclination angle of the inclined surface relative to the thickness direction of the insulating substrate 110 may be in the range of 1 degree to 45 degrees. According to this structure, the fixed portion 152 of the conductive member 150 can be easily inserted under the stopper 115A.

[0164] Fig.37 1 is a plan view showing the assembled state of the battery module 500B2. In the battery package 100B2 of the battery module 500B2, the insulating substrate 110 is opened at the first surface 111 and the recessed portion 113 on the side of the locking portion 115A. Fig.38 is along Fig.37 A cross-sectional view taken along line XXXVIII. Fig.39 is along Fig.37 Sectional view along line XXXIX.

[0165] like Figure 37 to Figure 39 As shown, in the assembly process of the battery module 500B2, the fixed portion 152 and the main body 151 are inserted into the second recess 114 and the recess 113 from the opening of the first surface 111. Then, by rotating the conductive member 150, the fixed portion 152 moves below the locking portion 115A, and the fixed portion 152 can be locked to the locking portion 115A. Fig.38 As shown, the fixed portion 152 may also have a bent portion bent upward, and the top end of the fixed portion 152 may be located above the main body 151 .

[0166] (Other examples)

[0167] Fig.40 It is a plan view of the battery module 500B3 with the cover removed. Fig.41 is along Fig.40 Sectional view along line XLI. Fig.42 is along Fig.40 A cross-sectional view taken along line XLII. Fig.43 It is a top view of the battery module 500B4 with the cover removed. Fig.44 is along Fig.43 A cross-sectional view taken along line XLIV. Fig.45 It is a cross-sectional view of the battery module 500B5. Fig.46 This is a plan view of the battery module 500B6 with the cover removed. Fig.47 is along Fig.46 A cross-sectional view of line XLVII. Fig.48 is along Fig.46 A cross-sectional view taken along line XLVIII.

[0168] like Fig.40 , Fig.41 , Fig.43 and Fig.44 As shown in FIG. 1 , the insulating substrate 110 may include, for example, a locking metal member 115B fixed or joined to the insulating substrate 110 as the fixing portion 115. Fig.43 As shown, the locking metal fitting 115B may be opened at the side of the recess 113. When the conductive member 150 is rotated, the fixed portion 152 is inserted into the locking metal fitting 115B from the side opening of the locking metal fitting 115B.

[0169] like Fig.45 As shown, 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, welding, or metal welding.

[0170] like Fig.46 As shown, the conductive member 150 may have four connecting portions 153, or may have four fixed portions 152. Not limited thereto, the conductive member 150 may have three or more than five connecting portions 153, or may have three or more than five fixed portions 152. The number of connecting portions 153 and the number of fixed portions 152 of one conductive member 150 may also be different.

[0171] [Implementation method 3]

[0172] Other embodiments of the present disclosure are described below. The battery modules 500C and 500C2 described in Embodiment 3 are examples of the battery module 500 involved in the present disclosure. In addition, the battery packages 100C and 100C2 described in Embodiment 3 are examples of the battery packages 100 involved in the present disclosure.

[0173] Fig.49 It is a top view of the battery module 500C with the cover removed. Fig.50 is along Fig.49 A cross-sectional view taken along line L. Fig.51 1 is a cross-sectional view of a battery module 500C2. The battery module 500C2 is different from the battery module 500C in that it includes a metal frame 123.

[0174] like Fig.49 , Fig.50 and Fig.51 As shown, in the battery package 100C, the connection portion 153 may at least partially overlap with the corresponding fixed portion 152 in a perspective plan view. The stopper portion 115A is sandwiched between the connection portion 153 and the corresponding fixed portion 152. According to this structure, the fixation of the conductive member 150 relative to the insulating substrate 110 becomes stronger. Since the connection portion 153 and the fixed portion 152 are located in the same direction relative to the center of the recess 113 in a plan view, the second electrode 132 is located in the same direction as the stopper portion 115A. In the case where the top view shape of the insulating substrate 110 is rectangular and the top view shape of the battery 200 is circular, the battery package 100 (100C) can be miniaturized by locating the second electrode 132 at the corner of the insulating substrate 110.

[0175] like Fig.50 and Fig.51 As shown in FIG. 1 , the second electrode 132 can be located on the upper surface of the stopper portion 115A. Therefore, the second electrode 132 can abut against and be electrically connected to the lower surface of the connecting portion 153 of the conductive member 150. In addition, the appearance of the second electrode 132 and the connection between the conductive member 150 and the second electrode 132 can be visually confirmed. Fig.15 and 16 As shown in the example, the fixed portion 152 is inserted into the second recess 114 by pressing the conductive member 150. Alternatively, Fig.17 and Fig.18 As in the illustrated example, the fixed portion 152 may be inserted into the second recess 114 by rotating the conductive member 150 .

[0176] like Fig.50 As shown, in order to make it difficult for the conductive member 150 to contact the cover 160, the insulating substrate 110 may have a cutout 116 opened at the first surface 110 and the recess 113, and the second electrode 132 may be located at the bottom surface of the cutout 116. Fig.51 As shown, in order to make it difficult for the conductive member 150 to contact the cover 160 , the metal frame 123 or the insulating frame or both may be located between the insulating substrate 110 and the cover 160 .

[0177] 〔Summarize〕

[0178] Method 1 of the present disclosure is a battery package, which comprises: an insulating substrate having a first surface, a second surface located on the side opposite to the first surface, and a recessed portion opened 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 recessed portion 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 abutting against an upper surface electrode of a battery accommodated in the recessed portion and electrically connecting the upper surface electrode and the second electrode, the insulating substrate having a fixing portion, the fixing portion restricting the conductive member from moving in a direction away from the bottom surface of the recessed portion.

[0179] Aspect 2 of the present disclosure provides the battery package according to aspect 1 above, wherein the second electrode is electrically connected to an upper surface of the conductive member.

[0180] Mode 3 of the present disclosure is a battery package according to the above-mentioned mode 1 or 2, wherein the conductive component comprises: a main body portion, which abuts against the upper surface electrode of the battery; a connecting portion, which extends outward from the main body portion in a plan view and is electrically connected to the second electrode; and a fixed portion, which extends outward from the main body portion in a plan view and is fixed to the fixing portion.

[0181] A fourth aspect of the present disclosure is the battery package according to the third aspect, wherein an extending direction of the connecting portion and an extending direction of the fixed portion form an angle.

[0182] Aspect 5 of the present disclosure is the battery package according to aspect 3 or 4, wherein the second electrode is electrically connected to a lower surface of the connection portion.

[0183] Aspect 6 of the present disclosure provides the battery package according to any one of aspects 1 to 5, further comprising a plurality of the second electrodes and a plurality of the fixing portions.

[0184] Mode 7 of the present disclosure is a battery package according to the above-mentioned mode 6, wherein the two second electrodes are located at positions opposite to each other with the recess in between, the two fixing parts are located at positions opposite to each other with the recess in between, and the line connecting the two second electrodes to each other forms an angle with the line connecting the two fixing parts to each other.

[0185] Aspect 8 of the present disclosure is the battery package according to any one of aspects 1 to 7, wherein the fixing portion is a locking portion having a locking surface facing the second surface.

[0186] Aspect 9 of the present disclosure is the battery package according to aspect 8, wherein the upper surface of the locking portion is a stepped surface or an inclined surface approaching the center of the recessed portion toward the bottom surface of the recessed portion.

[0187] Aspect 10 of the present disclosure is a battery package according to any one of aspects 3 to 5 or any one of aspects 6 to 9 referring to aspect 3, wherein the connecting portion overlaps the fixed portion in a perspective plan view.

[0188] Aspect 11 of the present disclosure is the battery package according to aspect 10, wherein the second electrode is located on the upper surface of the fixing portion and is electrically connected to the lower surface of the connecting portion.

[0189] Mode 12 of the present disclosure is a battery package according to mode 8 or 9, or any one of modes 9 to 11 cited from mode 8, wherein the insulating substrate has a cutout at the opening of the recess below the locking portion and at the first surface and the recess opening on the side of the locking portion.

[0190] Mode 13 of the present disclosure is a battery package according to any one of modes 3 to 5 above or any one of modes 6 to 12 above that refers to mode 3 above, wherein the fixed portion and / or the connecting portion has a bent portion or a folded portion and is elastic in a direction transverse to the main body portion.

[0191] Aspect 14 of the present disclosure is the battery package according to any one of aspects 1 to 13, wherein the conductive member is a leaf spring having a convex portion at the center thereof that presses the battery from above by being turned upside down.

[0192] Aspect 15 of the present disclosure is the battery package according to any one of aspects 1 to 7, wherein the fixing portion is a locking metal member joined to the insulating substrate.

[0193] Aspect 16 of the present disclosure is a battery package according to any one of aspects 3 to 5 or any one of aspects 6 to 7 referring to aspect 3, wherein in the fixing portion, the fixed portion is welded by metal.

[0194] A seventeenth aspect of the present disclosure is a battery module comprising: the battery package according to any one of the first to sixteenth aspects; and a battery housed in a recessed portion of the battery package.

[0195] Aspect 18 of the present disclosure is a battery module according to aspect 17 above, wherein the battery is an all-solid-state battery.

[0196] Aspect 19 of the present disclosure is a battery module according to aspect 17 above, wherein the battery is a thin-film type all-solid battery in which a negative electrode layer, an electrolyte layer, and a positive electrode layer are stacked on a metal plate.

[0197] Mode 20 of the present disclosure is a battery module according to Mode 17 above, wherein the battery is a coin cell.

[0198] [Additional Notes]

[0199] The invention involved in the present disclosure is described above based on the drawings and embodiments. However, the invention involved in the present disclosure is not limited to the above-mentioned embodiments. That is, the invention involved in the present disclosure can be variously modified within the scope shown in the present disclosure, and the embodiments obtained by appropriately combining the technical means respectively disclosed in different embodiments are also included in the technical scope of the invention involved in the present disclosure. In other words, it should be noted that those skilled in the art can easily make various deformations or modifications based on the present disclosure. In addition, it should also be noted that these deformations or modifications are included in the scope of the present disclosure.

[0200] Description of Reference Numerals

[0201] 100, 100A, 100B, 100C battery packaging

[0202] 110 Insulation substrate

[0203] 111 Page 1

[0204] 112 Side 2

[0205] 113 concavity

[0206] 115 Fixed part

[0207] 115A Stopper

[0208] 115a Stop surface

[0209] 115B Metal parts for locking

[0210] 131 First Electrode

[0211] 132 second electrode

[0212] 134A First external electrode

[0213] 134B Second external electrode

[0214] 140 Elastic member

[0215] 150 Conductive components

[0216] 151 Main body

[0217] 152 Fixed part

[0218] 153 Connection

[0219] 200 Batteries

[0220] 201 Lower surface electrode

[0221] 202 Upper surface electrode

[0222] 210 Metal Plate

[0223] 220 Negative electrode layer

[0224] 230 Electrolyte layer

[0225] 240 positive electrode layer

[0226] 500, 500A, 500B, 500C battery modules

Claims

1. A battery package, wherein: have: An insulating substrate having a first surface, a second surface located on a side opposite to the first surface, and a recessed portion opened 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 on the insulating substrate and electrically connected to the second external electrode; A conductive elastic member, located on the first electrode; as well as a conductive member that contacts the upper surface electrode of the battery housed in the recess and electrically connects the upper surface electrode and the second electrode; The insulating substrate includes 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 an upper surface of the conductive member.

3. The battery package according to claim 1 or 2, wherein: The conductive member has: A main body portion abutting against the upper surface electrode of the battery; a connecting portion extending outward from the main body portion in a plan view and electrically connected to the second electrode; as well as The fixed portion 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: An extending direction of the connecting portion forms an angle with an extending direction of the fixed portion.

5. The battery package according to claim 3 or 4, wherein: The second electrode is electrically connected to the lower surface of the connection portion.

6. The battery package according to any one of claims 1 to 5, wherein A plurality of the second electrodes and a plurality of the fixing parts are provided.

7. The battery package according to claim 6, wherein: The two second electrodes are located at positions facing each other across the recess, The two fixing portions are located at positions opposite to each other across the recess. A line connecting the two second electrodes to each other and a line connecting the two fixing portions to each other form an angle.

8. The battery package according to any one of claims 1 to 7, wherein The fixing portion is a locking portion having a locking surface facing the second surface.

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

10. The battery package according to any one of claims 3 to 5, wherein In a plan view, the connecting portion overlaps with the fixed portion.

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

12. The battery package according to claim 8 or 9, wherein: The insulating substrate includes a cutout that opens in the recessed portion below the locking portion and opens in the first surface and the recessed portion on the side of the locking portion.

13. The battery package according to any one of claims 3 to 5, wherein The fixed portion and / or the connecting portion has a bent portion or a folded portion and is elastic in a direction transverse to the main body portion.

14. The battery package according to any one of claims 1 to 13, wherein The conductive member is a leaf spring having a protrusion at the center thereof that presses the battery from above by being turned upside down.

15. The battery package according to any one of claims 1 to 7, wherein The fixing portion is a locking metal member joined to the insulating substrate.

16. The battery package according to any one of claims 3 to 5, wherein In the fixing portion, the fixed portion is welded by metal.

17. A battery module, wherein: have: The battery package according to any one of claims 1 to 16; and The battery is housed in the recessed portion 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 type all-solid battery in which a negative electrode layer, an electrolyte layer, and a positive electrode layer are stacked on a metal plate.

20. The battery module according to claim 17, wherein: The battery is a coin cell.

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