Battery module

Abstract

A battery module that does not communicate with the outside except for an external electrode is achieved. The battery module includes a battery and a package. The battery is provided with at least one protrusion. The package includes a restricting portion that restricts movement of the battery in a direction away from the bottom surface of the first recess due to an elastic force of the elastic member by coming into contact with the battery protrusion.

Description

Technical Field

[0001] The present invention relates to a battery module. Background Art

[0002] As power supplies or auxiliary power supplies for small electronic devices, various types of power supplies or auxiliary power supplies 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 housed within a storage space of a sealed container. The sealed container comprises a base member having a first current collector formed thereon and a cover member fixed relative to the base member and having a second current collector formed thereon, with the storage space being divided between the two members. The electrochemical element comprises a first electrode (lower electrode) and a second electrode (upper electrode). An elastic member is provided between the cover member and the second electrode within the storage space to press the second electrode toward the first electrode and to provide electrical conduction between the second electrode and the second current collector.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2012-069508 Summary of the Invention

[0007] A battery module according to one embodiment of the present invention comprises: a battery having electrodes on the upper and lower sides and at least one protrusion; and a package, wherein the package comprises: an insulating substrate having a first surface; a second surface located on the side opposite to the first surface; and a first recess opened on the first surface and accommodating the battery; 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 first recess and electrically connected to the battery and the first external electrode; a second electrode electrically connected to the battery and the second external electrode; an elastic component located on the first electrode and electrically connecting the battery and the first electrode; and a limiting component which limits the movement of the battery in a direction away from the bottom surface of the first recess due to the elastic force of the elastic component by abutting against the protrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a perspective view showing the appearance of an exemplary battery module according to Embodiment 1.

[0009] Figure 2 It is an exploded perspective view of the battery module.

[0010] Figure 3 is an exemplary bottom view of the battery module.

[0011] Figure 4 It is a top view of the battery module with the cover removed.

[0012] Figure 5 It is along Figure 4 Sectional view along line VV.

[0013] Figure 6 This is a cross-sectional view showing an example of the internal structure of the battery according to the first embodiment.

[0014] Figure 7 It is a cross-sectional view of a battery module which is a modified example of the above-mentioned battery module.

[0015] Figure 8 It is a cross-sectional view showing a modified example of the above-mentioned battery.

[0016] Figure 9 It is a plan view of a battery module as a modified example of the above-mentioned battery module with its cover removed.

[0017] Figure 10 It is along Figure 9 Sectional view along line XX.

[0018] Figure 11 This is a plan view of an exemplary battery module according to Embodiment 1 with its cover removed.

[0019] Figure 12 It is along Figure 11 Cross-sectional view taken along line XII-XII.

[0020] Figure 13 It is along Figure 11 Cross-sectional view taken along line XIII-XIII.

[0021] Figure 14 It is a cross-sectional view of a battery module which is a modified example of the above-mentioned battery module.

[0022] Figure 15 is a cross-sectional view of an exemplary battery module according to Embodiment 3.

[0023] Figure 16 It is a cross-sectional view of a battery module which is a modified example of the above-mentioned battery module.

[0024] Figure 17 is a cross-sectional view of an exemplary battery module according to a fourth embodiment.

[0025] Figure 18 It is a cross-sectional view of a battery module which is a modified example of the above-mentioned battery module.

[0026] Figure 19It is a cross-sectional view of a battery module which is a modified example of the above-mentioned battery module.

[0027] Figure 20 This is a plan view of an exemplary battery module according to Embodiment 5 with its cover removed.

[0028] Figure 21 It is along Figure 20 Sectional view along line XXII-XXII.

[0029] Figure 22 This is a diagram showing a state in which the battery of the fifth embodiment is housed in a battery package.

[0030] Figure 23 This is a plan view of an exemplary battery module according to Embodiment 6 with its cover removed.

[0031] Figure 24 It is along Figure 23 The sectional view along the line XXIV-XXIV.

[0032] Figure 25 This is a diagram showing a state in which a battery according to Embodiment 6 is housed in a battery package.

[0033] Figure 26 is a cross-sectional view of an exemplary battery module according to the seventh embodiment. DETAILED DESCRIPTION

[0034] In the electrochemical cell disclosed in Patent Document 1, the upper electrode of the electrochemical element is electrically connected to the cover member via the elastic member between the cover member and the second electrode, so that electrical conduction is established between the cover member and the outside.

[0035] The present invention realizes a battery module which is not electrically connected to the outside except for the external electrodes.

[0036] According to one embodiment of the present invention, a battery module that is not electrically connected to the outside except for the external electrodes can be realized.

[0037] The battery, battery package, and battery module according to the embodiments of the present disclosure are described with reference to the accompanying drawings. In the following description, the cover side of the battery package and the first surface side of the insulating substrate are sometimes referred to as the upper side, and the insulating substrate side of the battery package and the second surface side of the insulating substrate are sometimes referred to as the lower side. In addition, the up and down directions are sometimes referred to as the height direction (thickness direction). This distinction between up and down is only for convenience and does not limit the upper and lower positions when the battery module is actually used.

[0038] [Implementation Method 1]

[0039] Figure 1This is a perspective view showing an exemplary appearance of the battery module 500 according to the first embodiment. Figure 2 yes Figure 1 Exploded perspective view of a battery module 500. Figure 3 yes Figure 1 FIG. 5 is an exemplary bottom view of a battery module 500 . Figure 4 It is a plan view of the battery module 500 with the cover 160 removed. Figure 5 It is along Figure 4 Sectional view along line VV. Figure 6 2 is a diagram showing an example of the internal structure of the battery 200. Figure 5 In FIG, the internal structure of the battery 200 is omitted. Figure 6 In the figure, the protrusion 201 located on the side surface 214c is omitted.

[0040] like Figures 1 to 5 As shown, the battery module 500 includes a battery package 100 and one or more batteries 200 housed in a first recess 113 of the battery package 100 .

[0041] Battery Package

[0042] The battery package 100 may include an insulating substrate 110, a conductive elastic member 140, a restricting portion 150, and a lid 160. The restricting portion 150 abuts against the protrusion 201 of the battery 200, thereby restricting the battery 200 from moving away from the bottom surface of the first recess 113 of the insulating substrate 110 due to the elastic force of the elastic member 140.

[0043] The insulating substrate 110 has a first surface 111 and a second surface 112 located opposite the first surface 111. Furthermore, the insulating substrate 110 has a first recess 113 opening on the first surface 111 and a second recess 114 opening on the inner side of the first recess 113. In the battery module 500 of this embodiment, a single battery 200 is housed in the first recess 113. Multiple batteries may be housed in the first recess 113.

[0044] The insulating substrate 110 can be made of an insulating inorganic material. Examples of insulating inorganic materials include ceramics such as alumina sintered bodies (alumina ceramics), aluminum nitride sintered bodies, mullite sintered bodies, or glass ceramic sintered bodies. When the insulating substrate 110 is ceramic, since the battery 200 can be hermetically sealed, the battery 200 can be protected from the effects of humidity or oxygen in the external environment. The insulating substrate 110 can be composed of a plurality of stacked insulating layers or a single insulating layer. The insulating layer is composed of an insulating material such as alumina sintered bodies, glass ceramic sintered bodies, mullite sintered bodies, or aluminum nitride sintered bodies.

[0045] In the case where the insulating layer is composed of, for example, an alumina sintered body, the insulating substrate 110 is produced as follows. That is, first, a ceramic green sheet that will serve as the insulating layer is produced. Raw material powders such as alumina and silicon oxide are formed into sheets together with an appropriate organic binder and an organic solvent to produce a plurality of ceramic green sheets in the form of square sheets. Next, a laminate is produced by stacking these ceramic green sheets. The first recess 113 and the second recess 114 are formed by providing through holes in the ceramic green sheet using a mold or the like. Then, the insulating substrate 110 is produced by firing the laminate at a temperature of 1300 to 1600°C.

[0046] The insulating substrate 110 has a size of, for example, a side of a quadrilateral of 1 mm to 20 mm and a thickness of 0.3 mm to 5 mm. The size of the first recess 113 of the insulating substrate 110 can be set according to the size of the battery 200 .

[0047] like Figure 4 As shown, the size of the first recess 113 when viewed from above is slightly larger than the size of the battery 200 when viewed from above. The inner wall of the first recess 113 can be parallel to the thickness direction of the insulating substrate 110. The depth of the first recess 113 can be sufficient so that the battery 200 does not contact the lid 160 when the battery 200 is mounted on the battery package 100. The state in which the battery 200 is mounted on the battery package 100 refers to a state in which the protrusion 201 abuts the restricting portion 150 and the elastic member 140 is compressed. The depth of the first recess 113 can be greater than the height of the battery 200 accommodated in the first recess 113 and the uncompressed elastic member 140 combined. The top view shape of the first recess 113 is not limited to a circle and can be modified according to the shape of the battery 200. In this specification, the term "parallel" refers to parallelism to the extent that it can be observed and does not require strict parallelism.

[0048] like Figures 2 to 5 As shown, the insulating substrate 110 has a second recess 114 opened on the inner side of the first recess 113. Figures 2 to 5 As shown, the insulating substrate 110 may have two second recesses 114. The two second recesses 114 may be opposite to each other with the first recess 113 interposed therebetween. 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 first recess 113. Alternatively, the second recess 114 may be a recess formed in the entire inner periphery of the first recess 113. In other words, the second recess 114 may be a groove formed in the inner periphery of the first recess 113. The number and shape of the second recesses 114 may be determined based on the number and shape of the protrusions 201 and the configuration position of the protrusions 201 relative to the side surface 214c.

[0049] In this embodiment, if Figure 4 and Figure 5 As shown, the insulating substrate 110 includes two restricting portions 150. These two restricting portions 150 are opposed to each other across the first recess 113. Furthermore, the two restricting portions 150 are located at opposing corners of the insulating substrate 110. By arranging the restricting portions 150 at opposing positions across the first recess 113, the posture of the battery 200 can be stabilized. Furthermore, by locating the restricting portions 150 at the corners of the insulating substrate 110, the possibility of a reduction in the strength of the insulating substrate 110 can be reduced, the area for providing the restricting portions 150 can be easily secured, and the battery module 500 can be further reduced in size.

[0050] In this embodiment, the restricting portion 150 is a portion of the insulating substrate 110 located above the second recess 114. The restricting portion 150 has a locking surface 150X facing opposite the second surface 112. The locking surface 150X can also be considered the upper surface (top surface) of the second recess 114. Alternatively, the restricting portion 150 can be a convex portion that protrudes from the inner wall of the first recess 113 toward the center of the first recess 113.

[0051] The battery package 100 includes a restricting portion 150, which restricts the movement of the battery 200 away from the bottom surface of the first recess 113 due to the elastic force of the elastic member 140. In other words, the protrusion 201 of the battery 200 is pressed against the restricting portion 150 by the elastic member 140. As a result, the battery 200 is fixed while being pressed against the restricting portion 150. The elastic member 140 can absorb manufacturing errors such as variations in the height of the battery 200 and the depth of the first recess 113, as well as expansion and contraction of the battery 200. In addition, the elastic member 140 can mitigate impact during assembly of the battery module 500.

[0052] like Figure 5 As shown, the battery package 100 includes wiring conductors 130 on the surface and inside the insulating substrate 110. The wiring conductors 130 include a first electrode 131, a second electrode 132, a first connecting wiring 133A, a second connecting wiring 133B, a first external electrode 134A, and a second external electrode 134B.

[0053] The first electrode 131 is located on the bottom surface of the first concave portion 113 and is electrically connected to the first external electrode 134A via the first connection wiring 133A. The first electrode 131 may cover the entire surface of the bottom surface of the first concave portion 113. Figure 5As shown, the first electrode 131 may extend from the bottom surface of the first recess 113 into the interior of the insulating substrate 110. When the first electrode 131 extends into the interior of the insulating substrate 110, since the first connecting wiring 133A is located in the thicker portion of the insulating substrate 110, the bonding strength with the insulating substrate 110 is excellent. The first electrode 131 may also be contained within the bottom surface of the first recess 113 when viewed from above. In other words, the first connecting wiring 133A may extend from the bottom surface of the first recess 113 to the second surface 112 and connect to the first external electrode 134A without the first electrode 131 extending into the interior of the insulating substrate 110. In this case, the path from the battery 200 to the first external electrode 134A is shorter, resulting in lower resistance and improved efficiency in extracting power from the battery 200 contained in the first recess 113.

[0054] The second electrode 132 is located on the insulating substrate 110 and is an electrode electrically connected to the second external electrode 134B via the second connecting wiring 133B. In this embodiment, the second electrode 132 is located on the locking surface 150X of the limiting portion 150. The second electrode 132 may also extend from the locking surface 150X of the limiting portion 150 to the interior of the insulating substrate 110. The second electrode 132 may also cover the entire surface of the locking surface 150X of the limiting portion 150. In addition, the second electrode 132 may also be located on the bottom surface of the second recess 114. In this embodiment, as Figure 4 and Figure 5 As shown, in the insulating substrate 110, the second electrodes 132 are located on the locking surfaces 150X of the two limiting portions 150. Thus, by having a plurality of second electrodes 132, even if a connection failure occurs at one of the second electrodes 132, connection can be ensured at the other second electrodes 132, thereby improving the reliability of the electrical connection.

[0055] The first and second external electrodes 134A and 134B are respectively located on the second surface 112 of the insulating substrate 110. The first and second external electrodes 134A and 134B may extend from the second surface 112 of the insulating substrate 110 toward side surfaces (including corners between side surfaces).

[0056] 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 module 500 can be surface-mounted on a mounting substrate.

[0057] The elastic member 140 can be any member as long as it is elastic and conductive, for example, Figure 2 and Figure 5The spring is a leaf spring or disc spring that projects away from the bottom surface of the first recess 113. The elastic member 140 is located on the first electrode 131 and, when one or more batteries 200 are accommodated in the first recess 113, between the first electrode 131 and the battery 200. This electrically connects the first electrode 131 and the battery 200 via the elastic member 140. Furthermore, when the battery 200 is accommodated in the first recess 113, the elastic member 140 applies force to the battery 200, moving it away from the bottom surface of the first recess 113.

[0058] The cover 160 can close the opening of the first recess 113. The cover 160 can be made of ceramic or metal, for example. The cover 160 is electrically insulated from the first electrode 131 and the second electrode 132. The cover 160 and the insulating substrate 110 can be joined by soldering, brazing, frit glass, or resin. In this case, the joining is performed by overall heating using reflow heating. In the case of soldering or brazing, as Figure 5 As shown, the frame-shaped metal film 122 can be 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 also be formed on the first surface 111 through a metallization process. When the cover 160 made of ceramic and the frame-shaped metal film 122 are bonded using brazing, a metal film having the same structure as the frame-shaped metal film 122 can also be located on the lower surface of the cover 160. To improve the bondability of the brazing, a nickel film can also be formed on the surfaces of the frame-shaped metal film 122 and the cover 160 by electroplating.

[0059] When joining the cover 160 made of metal and the frame-shaped metal film 122, direct seam welding, laser welding or electron beam welding can be used. Since these welding methods are performed by locally heating the joint, they can be hermetically sealed or vacuum-sealed at low temperatures compared to joining by overall heating (reflow heating). By sealing at low temperatures, the effect 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. When the cover 160 is made of metal, an iron-nickel (Fe-Ni) alloy or an iron-nickel-cobalt (Fe-Ni-Co) alloy can be used as the material of the cover 160. These alloys have a small difference in thermal expansion with ceramics and are therefore suitable as the cover 160 of the insulating substrate 110.

[0060] By closing the opening of the first recess 113 with the cover 160 , the space surrounded by the cover 160 and the insulating substrate 110 , that is, the storage space for the battery 200 , can be hermetically sealed or vacuum-sealed.

[0061] Figure 5The space S shown is the remaining space after the battery 200 is installed in the storage space. The volume ratio of space S to the external volume of the battery module 500 can be set to, for example, 5% to 30%. Furthermore, the distance between the lower surface of the cover 160 and the upper surface of the battery 200 can be, for example, 0.1 mm to 0.8 mm. Setting space S or the distance in this manner mitigates internal stress and pressure buildup in the battery 200 when the battery 200 expands due to high temperatures or generates gas, thereby improving the durability of the battery 200. Furthermore, even when external stress is applied to the cover 160, the space S between the cover 160 and the battery 200 reduces the stress. Furthermore, since the cover 160 does not contact the upper surface of the battery 200, discharge from components other than the external electrodes, such as the cover 160, to the outside is prevented. Therefore, power can be efficiently extracted from the battery 200 via the first and second external electrodes 134A, 134B.

[0062] Alternatively, the space S may be sealed in a nitrogen atmosphere or an argon atmosphere with a dew point of -20 degrees Celsius or less, or in a vacuum atmosphere. In this case, even if the ambient temperature and humidity rise, chemical reactions between moisture or oxygen and the battery material are suppressed, thereby improving the heat resistance and life of the battery 200.

[0063] Battery

[0064] The battery disclosed herein can be any battery having upper and lower electrodes. For example, it can be a button cell battery in which battery materials such as an electrolyte material, a positive electrode, a negative electrode, and a separator are arranged in a sealed metal container. The electrolyte material can be, for example, a solid electrolyte. Button cells are sometimes also called button cells. The battery disclosed herein can be a primary battery or a secondary battery. In addition, the battery disclosed herein can include not only chemical batteries but also power supply components such as double-layer capacitors and electric double-layer capacitors.

[0065] The battery 200 of this embodiment is a button battery. Figure 5 and Figure 6 As shown, battery 200 includes a positive electrode 211, a negative electrode 212, a positive electrode can 214, a negative electrode can 215, and a gasket 216. Separator 213 is located between positive electrode 211 and negative electrode 212 to retain an electrolyte material and reduce short circuiting.

[0066] The positive electrode can 214 is a container that houses the positive electrode 211. It can be a cylindrical container having an opening 214a and a bottom 214b. The negative electrode can 215 is a container that houses the negative electrode 212. It can be a cylindrical (cap-shaped) container having an opening 215a and a bottom 215b.

[0067] In this embodiment, the positive electrode can 214 is slightly larger than the negative electrode can 215 when viewed from above. Therefore, the negative electrode can 215 is inserted into the positive electrode can 214 through the opening 214a. Furthermore, the battery 200 has a bottom 215b that protrudes from the opening 214a, with a convex portion on the negative electrode can 215 side. When the positive electrode can 214 serves as the upper electrode, the negative electrode can serves as the lower electrode. When the negative electrode can 215 serves as the upper electrode, the positive electrode can 214 serves as the lower electrode.

[0068] The positive electrode can 214 and the negative electrode can 215, while containing the positive electrode 211, the negative electrode 212, and the separator 213, are secured to each other by an integral gasket 216 positioned between the inner surface of the positive electrode can 214 and the side surface 215c of the negative electrode can 215. The inner circumferential surface of the positive electrode can 214 refers to the surface of the positive electrode can 214 opposite the side surface 214c. This securing seals the positive electrode 211, the negative electrode 212, and the separator 213 within the metal container formed by the positive electrode can 214 and the negative electrode can 215.

[0069] The positive electrode can 214 can be made of, for example, stainless steel or cold-rolled steel. A nickel layer can be formed on the surface of the positive electrode can 214 by electroplating or pressure bonding. The negative electrode can 215 can be made of, for example, a clad material made by pressure bonding copper or nickel to stainless steel.

[0070] like Figure 2-5 As shown, the battery 200 may have at least one protrusion 201 on the side 214c. The protrusion 201 protrudes to the side of the battery 200. The protrusion 201 may be a conductive component. The protrusion 201 may be integrally formed with the positive electrode can 214. Alternatively, the protrusion 201 may be joined to the side 214c of the formed positive electrode can 214, for example, by brazing, soldering, or metal welding. Even in the case where the protrusion 201 is joined to the positive electrode can 214, the material of the protrusion 201 may be the same material as that of the positive electrode can 214. As the material of the protrusion 201, for example, materials generally used for metal springs may be cited. As the material, for example, in addition to the above-mentioned stainless steel, hard steel wire or piano wire may also be used.

[0071] The positive electrode can 214 has a protrusion 201 on its side surface 214c at a position where it abuts at least a portion of the restricting portion 150, described later, when the battery 200 is housed in the first recess 113. The positive electrode can 214 may have only one protrusion 201 on the side surface 214c, or may have multiple protrusions 201. In this embodiment, the positive electrode can 214 has two protrusions 201 at mutually opposing positions on the side surface 214c. Alternatively, the positive electrode can 214 may have a single annular protrusion 201 along the circumference of the side surface 214c. Alternatively, the positive electrode can 214 may have three or more protrusions 201 evenly spaced along the circumference of the side surface 214c. With these configurations, when the battery 200 is mounted on the battery package 100, the battery 200 does not tilt, and the battery 200 can be stably secured to the battery package 100. In addition, the possibility of the battery 200 contacting the cover 160 due to the battery 200 being tilted or moved can be reduced.

[0072] When the battery 200 is housed in the first recess 113, the protrusions 201 abut against at least a portion of the restricting portion 150. At this abutting portion, the second electrode 132 may be located between the protrusions 201 and the restricting portion 150. This restricts the movement of the battery 200 away from the bottom surface of the first recess 113 due to the elastic force of the elastic member 140. The number, size, shape, and position of the protrusions 201 on the side surface 214c are determined based on factors such as ease and cost of manufacturing the protrusions 201 and the durability of the restriction on this movement.

[0073] Furthermore, in this embodiment, the protrusions 201 are conductive and thus electrically connected to the second electrode 132 when housed in the first recess 113. The number, size, shape, and positions of the protrusions 201 can be determined based on the electrical connection with the second electrode 132. In other words, the number, size, shape, and positions of the protrusions 201 can be determined to reduce the possibility of the battery 200 tilting and causing poor electrical conduction when the battery 200 is housed in the first recess 113.

[0074] The shape of the cross section of the protrusion 201 along the radial direction of the battery 200 can be a shape whose length along the radial direction of the battery 200 increases from the negative electrode can 215 side to the positive electrode can 214 side. In this embodiment, the shape of the cross section of the protrusion 201 is a right triangle. The battery 200 is inserted into the first recess 113 from the negative electrode can 215 side. Therefore, when the shape of the cross section of the protrusion 201 is the above shape, the possibility of smoothly inserting the battery 200 into the first recess 113 can be increased. Therefore, the shape of the protrusion 201 can be determined in consideration of the ease of insertion into the first recess 113. The shape of the cross section is not limited to a right triangle, and can also be, for example, a trapezoid, a stepped shape, or an arc shape. In addition, the shape of the cross section can also be, for example, a rectangle.

[0075] When two or more batteries are stacked up and contained in the battery package 100 in the vertical direction, the battery farthest from the bottom surface of the first recess 113 can be the battery 200 having the protrusion 201. Figure 6 The battery is shown without the protrusion 201 .

[0076] As described above, in the battery module 500 of 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 or the like, and thus does not conduct electricity to the outside of the battery module 500. Consequently, discharge to the outside from components other than the external electrodes, such as the cover 160, is prevented, allowing efficient extraction of power from the battery 200 via the first external electrode 134A and the second external electrode 134B.

[0077] Furthermore, battery module 500 houses batteries having protrusions 201 within battery package 100 equipped with elastic members 140 and restrictors 150, eliminating the need for conductive resin to secure the batteries. This enables a battery module with high long-term reliability. Furthermore, the inclusion of elastic members 140 can absorb variations in battery height and depth within the recesses of the battery package.

[0078] The battery module 500 can be sealed with a sealing material such as a resin material around the edge of the battery module 500. In this way, the battery package 100A or the battery module 500 can be mounted on a substrate so that Figure 3 The illustrated battery package 100 has both the first external electrode 134A and the second external electrode 134B that are not exposed to the external environment. This prevents electrical short circuits between the first and second external electrodes 134A, 134B even if water intrudes into the mounting substrate or even in high-humidity environments, thereby reducing the possibility of leakage from the battery module 500.

[0079] Alternatively, the first and second external electrodes 134A and 134B may be separated from the outer edge of the insulating substrate 110 and a sealing pattern may be provided surrounding the first and second external electrodes 134A and 134B. The sealing pattern may be made of a conductive material such as a weldable metal. The sealing pattern may surround each of the first and second external electrodes 134A and 134B.

[0080] By soldering the seal pattern to the pattern of the mounting substrate, the first and second external electrodes 134A, 134B located inside the seal pattern can be sealed. In other words, the battery package 100 or battery module 500 can be mounted on the substrate so that neither the first nor the second external electrodes 134A, 134B of the battery package 100 is exposed to the external environment. Furthermore, soldering can be performed simultaneously with soldering the first and second external electrodes 134A, 134B to the electrodes of the mounting substrate.

[0081] <Battery Modification 1>

[0082] Figure 7 1 is a cross-sectional view of a battery module 500A including a battery package 100 and a battery 200A. Figure 7 In FIG, the internal structure of the battery 200A is omitted from illustration. Figure 7 The battery 200A shown is a modified example of the battery 200. Figure 7 As shown, the protrusion 201A can be a conductive and flexible plate-like member (metal plate). When the battery 200A is accommodated in the first recess 113, the position of the protrusion 201A on the side surface 214c and the extending direction of the protrusion 201A are determined so that the end of the protrusion 201A abuts the second electrode 132.

[0083] The protrusion 201A may be a separate component from the positive electrode can 214 or the negative electrode can 215, and may be, for example, a plate-shaped component extending from the opening 214a. In this case, the protrusion 201A may be joined to the side surface 214c by, for example, brazing, soldering, or welding. This facilitates the manufacture of the positive electrode can 214, and consequently, the battery 200A.

[0084] The projection 201A may also engage with the side surface 214c so as to separate from the negative electrode can 215 side toward the positive electrode can 214 side. In other words, the projection 201A may have a hook shape. For example, the projection 201A may have a shape that is inclined or stepped from the negative electrode can 215 side toward the positive electrode can 214 side when viewed from the side. By engaging in this manner, the projection 201A can increase the likelihood that the battery 200A can be smoothly inserted into the first recess 113.

[0085] Alternatively, the projection 201A may be formed by, for example, stamping out a claw-shaped portion when stamping the positive electrode can 214 from a metal plate, and then bending the claw-shaped portion using a die or the like. The projection 201A may be a portion of the positive electrode can 214 extending outward from the opening 214a of the positive electrode can 214. In this manner, the projection 201A may be a component integrally formed with the positive electrode can 214.

[0086] In addition, the protrusion 201A has elasticity in the radial direction of the battery 200A. Therefore, when the battery 200A is inserted into the first recess 113, the protrusion 201A is deformed and contracted in the radial direction due to contact with the insulating substrate 110. Therefore, the protrusion 201A has the above-mentioned elasticity, thereby increasing the possibility of smoothly inserting the battery 200A into the first recess 113. When the protrusion 201A abuts the bottom surface of the second recess 114, the radial movement of the battery 200 is also restricted, and the battery 200 can be fixed to the battery package 100. In addition, when the second electrode 132 is also located on the bottom surface of the second recess 114, the protrusion 201A abuts (presses) the second electrode 132 due to the radial elasticity, thereby achieving a connection with lower resistance.

[0087] <Battery Modification 2>

[0088] Figure 8 Reference numerals 1011 and 1012 are diagrams showing modified examples of the battery 200. Figure 8 In each battery, the projection 201 on the side surface 214c and the internal structure of the battery are omitted. Figures 2 to 5 In the battery module 500 shown, the elastic member 140 is separated from the battery 200, but as shown in FIG. Figure 8 As shown, the elastic component 140 may also be fixed to the battery 200 . Figure 8 The elastic member 140 is shown as being fixed to the negative electrode can 215. Depending on the orientation of the battery 200 housed in the battery package 100, the elastic member 140 may also be fixed to the positive electrode can 214.

[0089] like Figure 8 As shown in the reference numeral 1011, the battery 200 may include a single leaf spring configured to protrude in a direction away from the bottom 215b as the elastic member 140. Figure 8 As shown in the reference numeral 1012 , the battery 200 may include a plurality of leaf springs as the elastic member 140 , which are arranged to protrude in a direction away from the bottom 215 b .

[0090] In addition, the battery 200 may also include a leaf spring that is arranged to protrude toward the bottom 215b as the elastic member 140 (see Figure 5) Alternatively, the battery 200A may include a coil spring as the elastic member 140 .

[0091] When two or more batteries are stacked up and accommodated in the battery package 100 in the vertical direction, the elastic member 140 only needs to be fixed to the bottom of the battery closest to the bottom surface of the first recess 113 .

[0092] The elastic member 140 is not limited to Figure 5 and Figure 8 Examples shown include leaf springs of other shapes, coil springs made of metal wire, conductive rubber, and conductive sponges. By using graphene mesoporous sponge (GMS) as the conductive sponge, an elastic member 140 with excellent conductivity and durability can be realized.

[0093] <Modification of Battery Package>

[0094] Figure 9 and Figure 10 1 is a diagram showing a battery module 500A2 including a battery package 100A and batteries 200 . Figure 9 This is a plan view showing an example of the battery module 500A2 in a state where the cover 160 is removed. Figure 10 It is along Figure 9 The arrow section view of line XX in the figure. Figure 10 , the internal structure of the battery 200 is omitted from the illustration. The battery package 100A is different from the battery package 100 in that it includes a frame portion 120 .

[0095] like Figure 9 As shown, battery package 100A includes a frame 120 on first surface 111 that surrounds first recess 113. This ensures a sufficient distance between the upper surface of battery 200 and lid 160. Consequently, the likelihood of contact between battery 200 and lid 160 can be further reduced. Furthermore, since metal lid 160 and frame 120 can be joined by seam welding or the like, battery 200 can be hermetically sealed.

[0096] The frame portion 120 includes a frame-shaped metal film 122 and a metal frame 123 joined to the frame-shaped metal film 122. In this case, the cover 160 is made of metal, the metal frame 123 can be joined to the frame-shaped metal film 122 with a brazing material, and the cover 160 can be joined (welded) to the metal frame 123. As welding, for example, seam welding, direct seam welding, laser welding, or electron beam welding can be used. In particular, seam welding is resistance welding via the metal frame 123, which is advantageous in local heating of the joint. During seam welding, a current is applied to the cover 160, 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.

[0097] To improve solderability, a nickel film may be formed by electroplating on the surfaces of the frame-shaped metal film 122 and the metal frame 123. The metal frame 123 may be made of a material having a small thermal expansion difference with ceramics, such as an iron-nickel (Fe-Ni) alloy or an iron-nickel-cobalt (Fe-Ni-Co) alloy.

[0098] As described above, the frame portion 120 includes the frame-shaped metal film 122 and the metal frame 123 , thereby reducing the possibility of contact between the battery 200 and the cover 160 and further improving the airtightness of the battery module 500A2 .

[0099] [Implementation Method 2]

[0100] For the sake of convenience, the same reference numerals are given to components having the same functions as those described in the above embodiment, and their description will not be repeated.

[0101] Figure 11 This is a plan view of an exemplary battery module 500B according to the second embodiment with the cover 160 removed. Figure 12 It is along Figure 11 Cross-sectional view taken along line XII-XII. Figure 13 It is along Figure 11 The cross-sectional view along the XIII-XIII line in the figure. Figure 12 and Figure 13 In FIG, the internal structure of the battery 200B is omitted from illustration.

[0102] like Figures 11 to 13 As shown, the battery module 500B includes a battery package 100B and one or more batteries 200B housed in a first recess 113 of the battery package 100B.

[0103] The battery package 100B includes an insulating substrate 110 and a frame portion 120B surrounding a first recess 113 on a first surface 111 of the insulating substrate 110. The frame portion 120B includes an insulating frame 124 positioned on the first surface 111, a frame-shaped metal film 122 positioned on the insulating frame 124, and a metal frame 123 bonded to the frame-shaped metal film 122. A cover 160 is bonded to the metal frame 123. The insulating frame 124 is made of a ceramic material.

[0104] The battery package 100B is different from the insulating substrate 110 in that the second electrode 132 is arranged on the first surface 111 of the insulating substrate 110. Figure 13 As shown, in Embodiment 2, the second electrode 132 is located between the frame portion 120B and the first recess 113 on the first surface 111 .

[0105] The shape of the insulating frame 124 in a plan view can be any shape that allows the second electrode 132 located on the first surface 111 to be exposed. Furthermore, the insulating frame 124 and the restricting portion 150B can overlap when viewed from above. In other words, the insulating frame 124 and the second protrusion 201Y of the battery 200B, described later, can overlap when viewed from above. This overlap of the insulating frame 124 and the restricting portion 150B can improve the strength of the restricting portion 150B.

[0106] The second recess 114 can be open on the first surface 111, and the lower surface of the insulating frame 124 becomes the top surface of the second recess 114. In this case, the limiting portion is the portion of the insulating frame 124 that overlaps with the second recess 114 when viewed from above. The locking surface of the limiting portion is the portion of the lower surface of the insulating frame 124 that is exposed to the second recess 114. In other words, the insulating frame 124 has a convex portion protruding from the inner surface of the second recess 114, and the convex portion can function as a limiting portion. Even if the second protrusion 201Y of the battery 200B abuts against the protrusion of the insulating frame 124, the battery 200B is not conductive with the cover 160 because the insulating frame 124 is between the cover 160 and the second protrusion 201Y.

[0107] In addition, if Figure 12 As shown, when the restriction portion 150B, which is a portion of the insulating substrate 110, is interposed between the insulating frame 124 and the second protrusion 201Y, a metal frame may be used in place of the insulating frame 124. The metal frame may also have a protrusion protruding from the upper surface of the metal frame. The protrusion of the metal frame may also function as the metal frame 123. In this case, the battery package 100B does not need to include the frame-shaped metal film 122 and the metal frame 123.

[0108] In the battery module 500B, the height obtained by adding the depth of the first recess 113 and the height of the insulating frame 124 can be sufficient as long as the battery 200B does not contact the cover 160 when the battery 200B is mounted on the battery package 100B. The state in which the battery 200B is mounted on the battery package 100B refers to a state in which the second protrusion 201Y abuts the restricting portion 150B and the elastic member 140 is compressed. The height obtained by adding the depth of the first recess 113 and the height of the insulating frame 124 can be greater than the combined height of the battery 200B housed in the first recess 113 and the uncompressed elastic member 140.

[0109] The battery 200B may include, as the protrusions 201B, a first protrusion 201X that abuts against the second electrode 132 and a second protrusion 201Y that abuts against the restriction portion 150B.

[0110] In the battery module 500B, the restriction portion 150B is a portion of the insulating substrate 110B located between the second recess 114 and the insulating frame 124 .

[0111] When battery 200B is housed in first recess 113, positive electrode can 214 has a second protrusion 201Y on side 214c at a position that abuts at least a portion of a restricting portion 150B, described later. This restricts movement of battery 200B away from the bottom surface of first recess 113 due to the elastic force of elastic member 140.

[0112] In this embodiment, the positive electrode can 214 has second protrusions 201Y at opposing positions on the side surface 214c. The number, size, shape, and position of the second protrusions 201Y on the side surface 214c can be determined similarly to the protrusions 201 in the first embodiment.

[0113] In the battery package 100B, the restriction portion 150B does not need to include the second electrode 132 . Therefore, unlike the protrusion 201 in the first embodiment, the second protrusion 201Y does not need to have a function of electrically connecting to the second electrode 132 .

[0114] Furthermore, the positive electrode can 214 has a first protrusion 201X on the side surface 214c at a position that abuts at least a portion of the second electrode 132 located on the first surface 111 when the battery 200B is housed in the first recess 113. The positive electrode can 214 may have only one first protrusion 201X on the side surface 214c, or may have a plurality of first protrusions 201X. In this embodiment, the positive electrode can 214 has first protrusions 201X at mutually opposing positions at the uppermost portion of the side surface 214c.

[0115] The number, size, and shape of the first protrusions 201X can be appropriately modified based on the position, size, and shape of the second electrode 132. Furthermore, the number, size, shape, and position of the first protrusions 201X on the side surface 214c can be determined to reduce the likelihood of the battery 200B tilting and causing poor conduction when the battery 200B is housed in the first recess 113. In this embodiment, the first protrusions 201X are plate-shaped.

[0116] To reduce the possibility of the above-mentioned conduction failure, the first protrusions 201X and the second protrusions 201Y may be alternately arranged along the outer circumference of the battery 200B. In this embodiment, the two first protrusions 201X and the two second protrusions 201Y are alternately arranged along the circumference of the side surface 214c at 90° intervals.

[0117] The first protrusions 201X and the second protrusions 201Y are arranged alternately and at equal intervals along the circumference of the side surface 214c. This prevents the battery 200B from tilting when mounted on the battery package 100B, allowing the battery 200B to be stably secured to the battery package 100B. This also reduces the likelihood of the battery 200B contacting the cover 160 due to tilting or movement of the battery 200B.

[0118] In addition, in this embodiment, Figure 11 and Figure 12 As shown, the two restricting portions 150B are positioned opposite each other across the first recess 113. Furthermore, the two restricting portions 150B are located at opposing corners of the insulating substrate 110. By arranging the restricting portions 150B at opposing positions across the first recess 113, the posture of the battery 200B can be stabilized. Furthermore, by locating the restricting portions 150B at the corners of the insulating substrate 110, the possibility of weakening the insulating substrate 110 can be reduced, the area for the restricting portions 150B can be easily secured, and the battery module 500B can be further reduced in size.

[0119] Furthermore, since the two first protrusions 201X can be electrically connected to the two second electrodes 132, respectively, the likelihood of poor electrical conduction between the first protrusions 201X and the second electrodes 132 can be further reduced, regardless of the flatness of the first surface 111. To further reduce the likelihood of poor electrical conduction, the battery package 100B may include three or more second electrodes 132, and the battery 200B may include three or more first protrusions 201X.

[0120] The first protrusion 201X and the second protrusion 201Y may also be integrally formed with the positive electrode can 214. Alternatively, the first protrusion 201X and the second protrusion 201Y may be joined to the upper surface of the positive electrode can 214 by, for example, brazing, soldering, or metal welding. Figure 7 The material of the first and second protrusions 201X and 201Y may be the same as that of the positive electrode can 214 or any of the materials listed as the material of the protrusions 201 in the first embodiment.

[0121] Furthermore, as described above, the second protrusion 201Y may not be electrically connected to the second electrode 132. Therefore, the second protrusion 201Y may not be electrically conductive. In this case, the material of the second protrusion 201Y may be, for example, rubber or plastic. The second protrusion 201Y may be bonded to the side surface 214c using, for example, resin.

[0122] In the battery module 500B with the cover 160 removed, the second electrode 132 is exposed on the upper surface of the battery package 100B. Therefore, the appearance of the second electrode 132 and the connection between the first protrusion 201X for conducting electricity and the second electrode 132 can be visually confirmed.

[0123] In battery module 500B, the insulating substrate 110 includes a first recess 113 and a second recess 114. The restricting portion 150B is located on the insulating substrate between the second recess 114 and the insulating frame 124. However, the insulating substrate 110 may not include the second recess 114. In this case, the insulating frame 124 above the second raised portion 201Y includes a protrusion protruding from the inner surface of the first recess 113. This protrusion can function as the restricting portion 150B. In other words, the restricting portion 150B may also be part of the insulating frame 124.

[0124] <Battery Variations>

[0125] Figure 14 1 is a cross-sectional view of a battery module 500B2 including a battery package 100B and a battery 200B2. Figure 14 The internal structure of battery 200B2 is omitted from illustration. Battery 200B2 has a conductive member 218 on the upper surface (corresponding to bottom 214b) of the positive electrode can 214. Conductive member 218 may be, for example, a conductive plate-shaped member (metal plate). When viewing battery 200B2 from above, the portion of conductive member 218 that protrudes from side surface 214c functions as first protrusion 201X.

[0126] The conductive member 218 can be joined to the upper surface of the positive electrode can 214 by, for example, brazing, soldering, or welding. Alternatively, the protrusion 201 can be integrally formed with the positive electrode can 214. The conductive member 218 can be made of the same material as the positive electrode can 214, or any of the materials listed as the material for the protrusion 201 in Embodiment 1.

[0127] [Implementation Method 3]

[0128] Figure 15 : is a cross-sectional view showing an example of a battery module 500C. Figure 15 In the figure, the internal structure of the battery 200C is omitted. Figure 15 As shown, the battery module 500C includes a battery package 100C and a battery 200C housed in a first recess 113 of the battery package 100C.

[0129] like Figure 15As shown, the battery 200C has a conductive protrusion 201C, and the conductive protrusion 201C has an elastic force. When the battery 200C is accommodated in the first recess 113, the protrusion 201C is electrically connected to the second electrode 132 located on the inner surface of the second recess 114. In the battery package 100C, the second electrode 132 is located on the inner surface (bottom surface) of the second recess 114. The second electrode 132 is connected to the second connection wiring 133B via the internal wiring 135 located inside the insulating substrate 110. The second electrode 132 can also be located on the upper surface (top surface) of the second recess 114. The protrusion 201C abuts against the limiting portion 150 due to the elastic force of the elastic component 140.

[0130] The projection 201C is formed by joining a portion of a conductive and flexible plate-like member (metal plate) to the side surface 214c and bending or folding the portion not joined to the side surface 214c. The plate-like member can be joined to the side surface 214c by, for example, brazing, soldering, or metal welding.

[0131] Therefore, the battery 200C having the protrusion 201C can be manufactured simply by joining the plate-shaped member to the side surface 214c and bending it. Therefore, the battery 200C can be manufactured easily.

[0132] In addition, the protrusion 201C having a curved or bent portion has elasticity in the radial direction of the battery 200C. Therefore, when the battery 200C is inserted into the first recess 113, the protrusion 201C is deformed and contracted in the radial direction due to contact with the insulating substrate 110. Therefore, the protrusion 201C has the above-mentioned elasticity, thereby increasing the possibility of smoothly inserting the battery 200C into the first recess 113. When the protrusion 201C abuts the bottom surface of the second recess 114, the radial movement of the battery 200C is also restricted, and the battery 200C can be fixed to the battery package 100C. In addition, due to the radial elasticity, the protrusion 201C abuts (presses) the internal wiring 135 located on the bottom surface of the second recess 114, thereby achieving a lower resistance connection.

[0133] <Battery Variations>

[0134] Figure 16 1 is a cross-sectional view of a battery module 500C2 including a battery package 100C and a battery 200C2. Figure 16 In the figure, the internal structure of the battery 200C2 is omitted.

[0135] The battery 200C2 has a conductive member 218C.

[0136] Conductive component 218C2 includes a first portion 218X and a second portion 218Y. First portion 218X is the portion of conductive component 218C2 that extends at least radially of battery cell 200C2. Second portion 218Y is the portion of conductive component 218C2 that extends along side surface 214c. Protrusion 201C2 is located at the end of second portion 218Y.

[0137] Second portion 218Y is spaced apart from side surface 214c. Therefore, second portion 218Y has elasticity in the radial direction of battery cell 200C2. Therefore, second portion 218Y is deformed to contract in the radial direction, and protrusion 201C2 is easily inserted into first recess 113.

[0138] The cross-sectional shape of the protrusion 201C2 along the radial direction of the battery 200C2 can be, for example, an arc. However, this cross-sectional shape can also be such that the length along the radial direction of the battery 200C2 increases from the negative electrode can 215 side toward the positive electrode can 214 side. For example, the cross-sectional shape can be a right triangle, a trapezoid, a stepped shape, or an arc. Alternatively, the cross-sectional shape can be, for example, a rectangle.

[0139] First portion 218X can be joined to the upper surface of positive electrode can 214, for example, by brazing, soldering, or welding. Second portion 218Y can be formed by bending conductive member 218C2. Protrusion 201C2 can be joined to the end of second portion 218Y, for example, by brazing, soldering, or welding.

[0140] However, the protrusion 201C2 may be integrally formed with the conductive member 218C2. Furthermore, the protrusion 201C2 may be a curved portion or bent portion formed by bending the end of the second portion 218Y. Furthermore, the conductive member 218C2 may be integrally formed with the positive electrode can 214.

[0141] [Implementation Method 4]

[0142] Figure 17 : is a cross-sectional view showing an example of a battery module 500D. Figure 17 In the figure, the internal structure of the battery 200D is omitted. Figure 17 As shown, the battery module 500D includes a battery package 100D and one or more batteries 200D housed in a first recess 113 of the battery package 100D.

[0143] In the battery module 500D, the battery 200D is housed such that the positive electrode can 214 is located on the bottom side of the first recess 113 and the negative electrode can 215 is located on the opening side of the first recess 113 .

[0144] In the battery package 100D, the insulating substrate 110D does not have a second recess, unlike the insulating substrate 110 of the first embodiment. On the other hand, the battery package 100D has a locking metal member 170 electrically connected to the first electrode 131. The locking metal member 170 includes a side plate 171 extending along the inner side surface of the first recess 113 in a direction from the bottom surface of the first recess 113 toward the opening of the first recess 113. The side plate 171 has a restricting portion 150D. More specifically, the side plate 171 has a through hole 172 whose edge abuts against the protrusion 201D, and this through hole 172 functions as the restricting portion 150D.

[0145] like Figure 17 As shown, battery 200D has a protrusion 201D. The cross-sectional shape of protrusion 201D along the radial direction of battery 200D is such that its length increases from the positive electrode can 214 side toward the negative electrode can 215 side. In this embodiment, the cross-sectional shape of protrusion 201D is a right triangle.

[0146] Battery 200D includes a conductive member 218D extending from the upper surface (negative electrode can 215) of battery 200D. Conductive member 218D may be, for example, a plate-like member (metal plate) that is conductive. Conductive member 218D may be flexible. In this case, conductive member 218D exhibits elasticity in the vertical direction.

[0147] In this embodiment, the conductive component 218D has a pad 219 at the end thereof that contacts the second electrode 132. Since the conductive component 218D has elasticity, the pad 219 is pressed against the second electrode 132. As a result, the resistance in the connection between the conductive component 218D and the second electrode 132 is reduced. However, the conductive component 218D may also be Figure 14 The conductive member 218 shown is a plate-shaped member that does not have a pad 219.

[0148] The conductive member 218D may be joined to the upper surface of the battery 200D, for example, by soldering, tin welding, or metal welding. The pad 219 may be joined to an end of the conductive member 218D, for example, by soldering, tin welding, or metal welding.

[0149] However, the pad 219 may be integrally formed with the conductive member 218D. Furthermore, the pad 219 may be a bent portion or folded portion formed by bending the end of the conductive member 218D. Furthermore, the conductive member 218D may be integrally formed with the negative electrode canister 215.

[0150] According to the structure of the battery module 500D, the positive electrode of the battery 200D may be connected to the first electrode 131 and the first external electrode 134A, and the negative electrode may be connected to the second electrode 132 and the second external electrode 134B.

[0151] Figure 18 1 is a cross-sectional view of a battery module 500D2 including a battery package 100D2 and a battery 200D2. Figure 18 In the figure, the internal structure of the battery 200D2 is omitted.

[0152] The battery 200D2 has a conductive component 218D2. The conductive component 218D2 is connected to Figure 17 The conductive component 218D is different in that a conductive and flexible plate-shaped component (metal plate) is bent in the vertical direction.

[0153] The conductive component 218D2 has elasticity in the vertical direction. This can absorb manufacturing errors such as deviations in the height direction of the battery 200D2 and deviations in the depth of the first recess 113, as well as expansion and contraction of the battery 200D2. This can stabilize the conduction between the second electrode 132 and the conductive component 218D2. Since the conductive component 218D2 has a portion that is bent in the vertical direction, it is easier to deform than the conductive component 218D. Figure 18 As shown, the battery package 100D2 may also have a step portion on the first surface 111 of the insulating substrate 110D2 to accommodate the bent portion of the conductive member 218D2. In this case, the second electrode 132 may be formed on the upper surface of the step portion.

[0154] In this embodiment, the conductive member 218D2 includes a pad 219 at its end that contacts the second electrode 132. Because the conductive member 218D2 is elastic, the pad 219 is pressed against the second electrode 132. This reduces the resistance in the connection between the conductive member 218D2 and the second electrode 132. However, the conductive member 218D2 does not necessarily have the pad 219.

[0155] Figure 19 1 is a cross-sectional view of a battery module 500D3 including a battery package 100D3 and a battery 200D2. Figure 19 In the figure, the internal structure of the battery 200D2 is omitted.

[0156] The battery package 100D3 includes a locking metal member 170D. The locking metal member 170D includes a side plate 171 that extends along the inner side surface of the first recess 113 in a direction from the bottom surface of the first recess 113 toward the opening of the first recess 113. The side plate 171 includes a limiting portion 150D2. More specifically, the side plate 171 includes a bent portion 173 at the end of the side plate 171, and the bent portion 173 functions as the limiting portion 150D2. The bent portion 173 bends from the extension direction of the side plate 171 toward the battery 200D2. As a result, the protrusion 201D of the battery 200D2 can abut against the limiting portion 150D2 due to the elastic force of the elastic member 140.

[0157] [Implementation 5]

[0158] Figure 20 This is a plan view showing an example of the battery module 500E in a state where the cover 160 is removed. Figure 21 It is along Figure 20 The sectional view along the line XXII-XXII in the figure. Figure 21 In the figure, the internal structure of the battery 200E is omitted.

[0159] like Figure 20 and Figure 21 As shown, the battery module 500E includes a battery package 100E and a battery 200E housed in a first recess 113 of the battery package 100E.

[0160] Battery 200E includes a conductive member 218E on the upper surface of the positive electrode can 214. Conductive member 218E may be, for example, a conductive plate-shaped member (metal plate). In a plan view of battery 200E, conductive member 218E includes a protrusion 201E protruding from side surface 214c.

[0161] like Figure 21 As shown, the protrusion 201E protrudes upward or obliquely upward relative to the positive electrode can 214. The battery 200E has four protrusions 201E at equal intervals along the periphery of the battery 200E. The protrusions 201E have through holes 201EP.

[0162] The insulating substrate 110E has a limiting portion 150E that protrudes from the inner wall of the first recess 113 toward the center of the first recess 113. In other words, the limiting portion 150E is a convex portion that protrudes from the inner side surface of the first recess 113. In the battery package 100E, the second electrode 132 is located on the lower surface of the limiting portion 150E. By engaging the limiting portion 150E with the through hole 201EP of the protrusion 201E, the battery 200E can be electrically connected to the second electrode 132 located on the lower surface of the limiting portion 150E. The second electrode 132 can also be located on the upper surface of the limiting portion 150E, which is part of the inner side surface of the insulating substrate 110E. In this case, the protrusion 201E is electrically connected to the second electrode 132 located on the upper surface of the limiting portion 150E by the force that expands toward the side of the protrusion 201E. Furthermore, by engaging the restricting portion 150E with the through-hole 201EP, the battery 200E is restricted from moving away from the bottom surface of the first recess 113. The presence of the through-hole 201EP allows the battery 200E to be more stably held within the first recess 113. Furthermore, by adjusting the position of the through-hole 201EP, the position of the battery 200E within the first recess 113 can be adjusted.

[0163] Figure 22 1 is a diagram showing a state where a battery 200E is housed in a battery package 100E. Figure 22 In the figure, the internal structure of the battery 200E is omitted. Figure 22 As shown, the battery 200E can be accommodated and fixed in the battery package 100E by elastic deformation of the conductive member 218E.

[0164] In Embodiment 5, an example is shown in which protrusion 201E has through-hole 201EP. However, protrusion 201E may not have through-hole 201EP. In this case, the upper end of protrusion 201E abuts against the lower surface of restricting portion 150E, thereby achieving electrical connection between battery 200E and second electrode 132 and restricting movement of battery 200E away from the bottom surface of first recess 113.

[0165] [Implementation Method 6]

[0166] Figure 23 This is a plan view showing an example of the battery module 500F in a state where the cover 160 is removed. Figure 24 It is along Figure 23 The sectional view along the line XXIV-XXIV. Figure 25 This is a diagram showing a state in which a battery 200F is housed in a battery package 100F. Figure 25 The bottom figure is along Figure 23 The sectional view along the XXV-XXV line in the figure. Figure 24 and Figure 25 In FIG, the internal structure of the battery 200F is omitted from the illustration.

[0167] like Figure 23 and Figure 24 As shown, the battery module 500F includes a battery package 100F and a battery 200F housed in a first recess 113 of the battery package 100F. The battery package 100F includes an insulating substrate 110F.

[0168] The insulating substrate 110F has a restricting portion 150F protruding from the inner wall of the first recess 113 toward the center of the first recess 113. The insulating substrate 110F also has a step portion on the first surface 111. The second electrode 132 is located on the upper surface of the step portion.

[0169] Battery 200F includes a conductive member 218F located on the upper surface of the positive electrode can 214. Conductive member 218F may be, for example, a conductive plate-shaped member (metal plate). In a plan view of battery 200F, conductive member 218F includes a first protrusion 201FX and a second protrusion 201FY that protrude from side surface 214c.

[0170] like Figure 24 As shown, the first protrusion 201FX may extend upward or diagonally upward relative to the positive electrode can 214. Furthermore, the portion protruding from the positive electrode can 214 includes a plurality of curved portions that curve in a vertically varying direction. The first protrusion 201FX is electrically connected to the second electrode 132. The plurality of curved portions provides vertical elasticity for the first protrusion 201FX, ensuring stable electrical connection with the second electrode 132.

[0171] The second protrusion 201FY has a through hole 201FP. The restriction portion 150F engages with the through hole 201FP of the second protrusion 201FY, thereby restricting the movement of the battery 200F away from the bottom surface of the first recess 113 .

[0172] In this embodiment, the two first protrusions 201X and the two second protrusions 201Y are positioned alternately along the circumference of the side surface 214c and at intervals of 90 degrees. Figure 25 As shown, the battery 200F can be accommodated and fixed in the battery package 100F by elastic deformation of the conductive member 218F.

[0173] [Implementation Method 7]

[0174] Figure 26 1 is a cross-sectional view showing an example of a battery module 500G with the cover 160 removed. Figure 26 In the figure, the internal structure of the battery 200G is omitted.

[0175] like Figure 26 As shown, the battery module 500G includes a battery package 100G and a battery 200G housed in a first recess 113 of the battery package 100G.

[0176] The battery 200G has a conductive member 218G on the upper surface of the positive electrode can 214. The battery 200G also has a protrusion 201G that extends downward from the conductive member 218G along the side surface 214c of the battery 200G and further protrudes upward or obliquely upward.

[0177] Alternatively, the protrusion 201G and the protrusion 201A (see Figure 7 ) Similarly, the structure may be a protrusion upward or obliquely upward from the side surface 214c of the battery 200G. The protrusion 201G has a through hole 201GP.

[0178] The insulating substrate 110G of the battery package 100G has a plurality of restricting portions 150G protruding from the inner wall of the first recess 113 toward the center of the first recess 113. In the battery package 100G, the second electrode 132 is located on the lower surface of the restricting portion 150G.

[0179] By engaging the restricting portion 150G with the through-hole 201GP of the projection 201G, an electrical connection is achieved between the battery 200G and the second electrode 132 located on the lower surface of the restricting portion 150G. In the battery package 100G, the projection 201G protrudes upward from the side surface 214c of the battery 200G. The through-hole 201GP of the projection 201G engages with the restricting portion 150G on the side of the battery 200G, thereby reducing the space S between the battery 200G and the lid 160. This improves the energy density of the battery module 500G.

[0180] Furthermore, if Figure 26 As shown, in insulating substrate 110G, second electrode 132 may be located on the upper surface of at least one limiting portion 150G and on the inner side surface of insulating substrate 110E above the limiting portion 150G. This structure increases the contact area between protrusion 201G and the second electrode, reducing the connection resistance between battery 200G and second electrode 132 and improving power extraction efficiency.

[0181] 〔Summary column〕

[0182] (1) The battery module in mode 1 of the present disclosure comprises: a battery having electrodes on the upper and lower sides and at least one protrusion; and a package, the package comprising: an insulating substrate having a first surface; a second surface located on the side opposite to the first surface; and a first recessed portion opening on the first surface and accommodating the battery; 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 first recessed portion and electrically connected to the battery and the first external electrode; a second electrode electrically connected to the battery and the second external electrode; an elastic component located on the first electrode and electrically connecting the battery and the first electrode; and a limiting portion, which limits the movement of the battery in a direction away from the bottom surface of the first recessed portion due to the elastic force of the elastic component by abutting against the protrusion.

[0183] (2) A battery module according to aspect 2 of the present disclosure is the battery module according to aspect 1, wherein the second electrode is located in the restriction portion.

[0184] (3) A battery module according to aspect 3 of the present disclosure is the battery module according to aspect 1 or 2, wherein the protrusion protrudes laterally from the battery.

[0185] (4) A battery module according to aspect 4 of the present disclosure is the battery module according to aspect 1 or 2, wherein the projection protrudes upward from the upper surface of the battery.

[0186] (5) In the battery module of mode 5 disclosed herein, based on the battery module of any one of modes 1 to 4 described above, the insulating substrate has a second recess opening on the inner side surface of the first recess, and the insulating substrate located between the second recess and the first surface is the limiting portion.

[0187] (6) A battery module according to aspect 6 of the present disclosure is the battery module according to aspect 5, wherein the second electrode is located on the inner surface of the second recess.

[0188] (7) A battery module according to aspect 7 of the present disclosure is the battery module according to any one of aspects 1 to 4, wherein the insulating substrate has a convex portion protruding from the inner side surface of the first concave portion, and the convex portion serves as the restricting portion.

[0189] (8) A battery module according to aspect 8 of the present disclosure is the battery module according to aspect 7, wherein the second electrode is located on the convex portion.

[0190] (9) The battery module of mode 9 of the present disclosure is based on the battery module of any one of the above-mentioned modes 1 to 8, wherein the battery has a first protrusion electrically connected to the second electrode and a second protrusion abutting the limiting portion as the protrusion, the package has a frame portion surrounding the recess on the first surface, and the second electrode is located between the frame portion and the recess on the first surface.

[0191] (10) In the battery module according to aspect 10 of the present disclosure, in addition to the battery module according to aspect 9, the first protrusions and the second protrusions are alternately arranged along the outer circumference of the battery.

[0192] (11) A battery module according to aspect 11 of the present disclosure is the battery module according to any one of aspects 1 to 10, wherein the elastic member is a metal spring.

[0193] (12) The battery module of mode 12 disclosed herein is based on the battery module of mode 1 above, wherein the package has a locking metal part electrically connected to the first electrode, the locking metal part has a side plate extending along the inner side surface of the recess in a direction from the bottom surface of the recess toward the opening of the recess, and the side plate has a limiting portion.

[0194] (13) A battery module according to aspect 13 of the present disclosure is the battery module according to any one of aspects 1 to 12, further comprising a cover that closes the recess and insulates the battery.

[0195] (14) A battery module according to aspect 14 of the present disclosure is the battery module according to any one of aspects 1 to 13, wherein the battery module includes a frame portion surrounding the first recess on the first surface.

[0196] (15) A battery module according to aspect 15 of the present disclosure is the battery module according to aspect 14, wherein the frame portion includes a frame-shaped metal film and a metal frame body joined to the frame-shaped metal film.

[0197] (16) In a battery module according to aspect 16 of the present disclosure, in addition to the battery module according to aspect 15, the frame portion includes an insulating frame body between the frame-shaped metal film and the first surface.

[0198] [Additional Notes]

[0199] The invention of the present disclosure has been described above based on the accompanying drawings and embodiments. However, the invention of 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 disclosed in different embodiments are also included in the technical scope of the invention involved in the present disclosure. That is to say, those skilled in the art should note that various deformations or modifications can be easily made according to the present invention. It should also be noted that these deformations or modifications are included in the scope of the present invention.

[0200] Captions

[0201] 500, 500A, 500A2, 500B, 500B2, 500C, 500C2, 500D, 500D2, 500D3, 500E, 500F, 500G: Battery modules

[0202] 100, 100A, 100B, 100C, 100D, 100D2, 100D3, 100E, 100F, 100G: Battery packaging

[0203] 110, 110B, 110D, 110D2, 110E, 110F, 110G: Insulating substrate

[0204] 113: First recess

[0205] 114: Second recess

[0206] 120, 120B: Frame

[0207] 122: Frame-shaped metal film

[0208] 123: Metal frame

[0209] 124: Insulation frame

[0210] 130: Wiring conductor

[0211] 131: First electrode

[0212] 132: Second electrode

[0213] 134A: First external electrode

[0214] 134B: Second external electrode

[0215] 140: Elastic components

[0216] 150, 150B, 150D, 150D2, 150E, 150F, 150G: Restriction

[0217] 160: Cover

[0218] 170, 170D: Metal parts for locking

[0219] 171: Side panels

[0220] 200, 200A, 200B, 200B2, 200C, 200C2, 200D, 200D2, 200E, 200F, 200G: Battery

[0221] 201, 201A, 201B, 201C, 201C2, 201D, 201E, 201G: raised

[0222] 201FX, 201X: First raised part

[0223] 201FY, 201Y: Second raised portion

Claims

1. A battery module, wherein: have: a battery having electrodes on the upper and lower sides and at least one protrusion; and Package, having: an insulating substrate having a first surface; a second surface located opposite to the first surface; and a first recessed portion opened in the first surface and accommodating the battery; 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 first recess and electrically connected to the battery and the first external electrode; a second electrode electrically connected to the battery and the second external electrode; an elastic component, located on the first electrode and electrically connecting the battery and the first electrode; as well as The restricting portion restricts the battery from moving away from the bottom surface of the first recess due to the elastic force of the elastic member by abutting against the protrusion.

2. The battery module according to claim 1, wherein: The second electrode is located at the restriction portion.

3. The battery module according to claim 1 or 2, wherein: The protrusion protrudes toward the side of the battery.

4. The battery module according to claim 1 or 2, wherein: The protrusion protrudes upward from the upper surface of the battery.

5. The battery module according to any one of claims 1 to 4, wherein The insulating substrate has a second recessed portion opened on the inner side surface of the first recessed portion. The insulating substrate located between the second recess and the first surface serves as the restriction portion.

6. The battery module according to claim 5, wherein: The second electrode is located on an inner surface of the second recess.

7. The battery module according to any one of claims 1 to 4, wherein: The insulating substrate has a convex portion protruding from the inner side surface of the first concave portion, The convex portion is the restricting portion.

8. The battery module according to claim 7, wherein: The second electrode is located on the protrusion.

9. The battery module according to any one of claims 1 to 8, wherein: The battery has a first protrusion and a second protrusion as the protrusion, the first protrusion is electrically connected to the second electrode; the second protrusion abuts against the restriction portion, The package includes a frame portion surrounding the first recess on the first surface. The second electrode is located between the frame and the first recess on the first surface.

10. The battery module according to claim 9, wherein: The first protrusions and the second protrusions are alternately arranged along the outer circumference of the battery.

11. The battery module according to any one of claims 1 to 10, wherein: The elastic member is a metal spring.

12. The battery module according to claim 1, wherein: The package body has a locking metal member electrically connected to the first electrode, The locking metal member includes a side plate extending along the inner side surface of the first recess in a direction from the bottom surface of the first recess toward the opening of the first recess. The side plate has a restricting portion.

13. The battery module according to any one of claims 1 to 12, wherein: The battery module includes a cover that closes the first recess and insulates the battery.

14. The battery module according to any one of claims 1 to 13, wherein: The battery module includes a frame portion surrounding the first recess on the first surface.

15. The battery module according to claim 14, wherein: The frame portion includes a frame-shaped metal film and a metal frame body bonded to the frame-shaped metal film.

16. The battery module according to claim 15, wherein: The frame portion includes an insulating frame body between the frame-shaped metal film and the first surface.

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