Package for battery, battery module, and sealing method of battery module

Abstract

The present invention improves the connection reliability of a battery and the long-term reliability of a battery module. According to the present invention, an insulating substrate has a mounting section for mounting a battery including two electrode sections provided side by side along a first surface, a lid that covers the battery is positioned on the first surface side of the insulating substrate, the lid body is electrically insulated from a first electrode and a second electrode, and a package for the battery comprises a pressing member that presses the battery with an elastic force against the mounting section.

Description

Battery package, battery module, and battery module sealing method

[0001] The present disclosure relates to a battery package, a battery module, and a method for sealing a battery module.

[0002] Patent Document 1 discloses a battery module that can be surface-mounted on a circuit board as a power source or auxiliary power source for small electronic devices. The battery module (referred to as a surface-mounted battery in Patent Document 1) according to this prior art includes an insulating substrate (part of a component referred to as an exterior body in Patent Document 1), and a mounting portion for mounting a battery (referred to as a power generating element in Patent Document 1) is located on the upper surface of the insulating substrate. The battery includes two electrodes aligned along the upper surface of the insulating substrate.

[0003] A first external electrode (referred to as a positive electrode terminal electrode in Patent Document 1) is located on the underside of the insulating substrate. A second external electrode (referred to as a negative electrode terminal electrode in Patent Document 1) is located at a location on the underside of the insulating substrate separated from the first external electrode. The second external electrode is electrically connected to the second electrode. A first electrode (referred to as a positive electrode pad in Patent Document 1) is located at one left-right end of the mounting portion of the insulating substrate, and the first electrode is electrically connected to the first external electrode. A second electrode (referred to as a negative electrode pad in Patent Document 1) is located at the other left-right end of the mounting portion of the insulating substrate, and the second electrode is electrically connected to the first external electrode.

[0004] One of the two electrode portions of the battery (referred to as a positive end surface electrode in Patent Document 1) is electrically connected to the first electrode. The other of the two electrode portions of the battery (referred to as a negative end surface electrode in Patent Document 1) is electrically connected to the second electrode. One of the electrode portions of the battery is bonded to the first electrode by a conductive resin (referred to as a thermoplastic resin containing a conductive material in Patent Document 1). The other electrode portion of the battery is bonded to the second electrode by the conductive resin. In other words, the battery is fixed to the insulating substrate by the conductive resin.

[0005] Japanese Patent Application Publication No. 2004-152586

[0006] The battery package of the present disclosure comprises an insulating substrate having a first surface, a second surface opposite the first surface, and a mounting portion located on the first surface side for mounting a battery including two electrode portions, a first external electrode located on the second surface, a second external electrode located on the second surface, a first electrode located on one end side of the mounting portion and electrically connected to the first external electrode, a second electrode located on the other end side of the mounting portion and electrically connected to the second external electrode, a lid located on the first surface side, electrically insulated from the first electrode and the second electrode, and covering the battery, and a pressing member that presses the battery toward the mounting portion by elastic force.

[0007] In addition, the battery module according to the present disclosure includes the battery package and a battery mounted on the mounting portion, one of the two electrode portions electrically connected to the first electrode, and the other of the two electrode portions electrically connected to the second electrode portion.

[0008] In addition, the sealing method for a battery module according to the present disclosure is a method for sealing the battery module, in which the battery module is sealed while the pressing member arranged on the upper surface side of the battery is pressed by the lid body.

[0009] 11 is a schematic plan view showing a battery package and a battery module according to the first embodiment. FIG. 12 is a cross-sectional view taken along line II-II in FIG. 1. FIG. 13 is a schematic plan view showing a battery package and a battery module according to the first embodiment, with a metal frame omitted. FIG. 14 is a schematic cross-sectional view taken along line IV-IV in FIG. 3. FIG. 15 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the first embodiment. FIG. 16 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the first embodiment. FIG. 17 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the first embodiment. FIG. 18 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the first embodiment. FIG. 19 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the first embodiment. FIG. 19 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the first embodiment. FIG. 19 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the first embodiment. FIG. 1 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the second embodiment. FIG. 2 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the second embodiment. FIG. 3 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the second embodiment. FIG. 4 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the second embodiment. FIG. 5 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the second embodiment. FIG. 6 is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the second embodiment. FIG. 7 is a schematic cross-sectional view for explaining a sealing method for a battery module according to another aspect of the second embodiment. FIG. 8 is a schematic plan view showing a battery package and a battery module according to a third embodiment.23. A schematic cross-sectional view taken along line XXIV-XXIV in Fig. 23. A schematic plan view showing a battery package and a battery module according to a fourth embodiment. A schematic cross-sectional view showing a battery package and a battery module according to a fourth embodiment. A schematic plan view showing a battery package and a battery module according to a fifth embodiment. A schematic cross-sectional view taken along line XXVIII-XXVIII in Fig. 27. A schematic cross-sectional view showing a battery package and a battery module according to another aspect of the fifth embodiment. A schematic cross-sectional view showing a battery package and a battery module according to another aspect of the fifth embodiment. A schematic cross-sectional view showing a battery package and a battery module according to a sixth embodiment.

[0010] As the battery module is used for a long period of time, the conductive resin deteriorates due to moisture and oxygen present in the internal space of the battery module, or due to heat conduction from the environment in which the battery is used, reducing the bonding strength of the battery to the insulating substrate, making the battery more susceptible to peeling from the insulating substrate, and raising concerns about reduced connection reliability of the battery and long-term reliability of the battery module.

[0011] According to the present disclosure, the battery is less likely to peel off from the insulating substrate, and the battery connection reliability and the long-term reliability of the battery module can be improved.

[0012] Battery packages and battery modules according to embodiments will be described in detail below with reference to the drawings. However, for the sake of convenience, the figures referred to below show simplified views of only the components necessary for describing the embodiments. Therefore, battery packages and battery modules according to embodiments may include optional components not shown in the figures. Furthermore, the dimensions of the components in the figures do not necessarily faithfully represent the actual dimensions of the components and the dimensional ratios of each member. In this disclosure, "pressure-welded" refers to contact with pressure. "Rectangular" is not limited to a strict rectangular shape and includes shapes that can be visually recognized as a rectangle overall, even if the corners are curved. "Annular" refers to not only a circular annular shape but also a rectangular annular shape. "Upward" refers to one direction in the thickness direction of the insulating substrate, extending from the second surface side toward the first surface side of the insulating substrate. "Downward" refers to the other direction in the thickness direction of the insulating substrate, extending from the first surface side toward the second surface side of the insulating substrate.

[0013] A battery package 1 and a battery module 100 according to a first embodiment will be described with reference to FIGS. 1 to 4. FIG. 1 is a schematic plan view showing the battery package 1 and the battery module 100 according to the first embodiment. FIG. 1 shows a state in which a lid 9 is removed, and the lid 9 is indicated by a two-dot chain line in FIG. 1. FIG. 2 is a schematic cross-sectional view showing the battery package 1 and the battery module 100 according to the first embodiment. FIG. 3 is a schematic plan view showing the battery package 1 and the battery module 100 according to the first embodiment, with the metal frame omitted. FIG. 4 is a schematic cross-sectional view showing the battery package 1 and the battery module 100 according to the first embodiment, with the metal frame omitted.

[0014] As shown in the example of FIGS. 1 to 4 , a battery module 100 according to the first embodiment includes a battery package 1 according to the first embodiment and a battery 200 mounted in the battery package 1. The battery package 1 may include an insulating substrate 2, and the shape of the insulating substrate 2 in a plan view may be, for example, rectangular. The insulating substrate 2 is made of ceramics such as an aluminum oxide sintered body (alumina ceramics), an aluminum nitride sintered body, a mullite sintered body, or a glass ceramic sintered body. The insulating substrate 2 may have a single insulating layer or multiple laminated insulating layers. The shape of the insulating substrate 2 in a plan view is not limited to a rectangular shape and can be modified as appropriate.

[0015] As shown in the examples of FIGS. 1 to 4 , the insulating substrate 2 may have a first surface 2a, a second surface 2b located opposite the first surface 2a, and a plurality of side surfaces 2c located between the first surface 2a and the second surface 2b. The first surface 2a of the insulating substrate 2 may be flat or may have an uneven surface. The second surface 2b of the insulating substrate 2 may be flat or may have an uneven surface. The insulating substrate 2 may have a mounting portion 21 for mounting a battery 200 including two electrode portions 201, 202 aligned along the first surface 2a, and the mounting portion 21 may be located on the first surface 2a side of the insulating substrate 2. The battery 200 may be an all-solid-state battery. Alternatively, the battery 200 may be an electronic component capable of supplying electricity, such as a capacitor. The mounting portion 21 of the insulating substrate 2 may have a rectangular shape in plan view, for example. The mounting portion 21 may overlap the battery 200 when the battery module 100 is viewed in plan view. The size of the mounting portion 21 of the insulating substrate 2 in a plan view may be slightly larger than the size of the battery 200 in a plan view.

[0016] 1 to 4 , the battery package 1 may include an insulating frame 3 as an example of a frame located so as to surround the mounting portion 21 on the first surface 2a of the insulating substrate 2. The insulating frame 3 may be made of ceramics and may be integrated with the insulating substrate 2. The insulating frame 3 may have a single insulating layer or a plurality of laminated insulating layers.

[0017] As shown in the examples of FIGS. 2 and 4 , the battery package 1 may include a first external electrode 4 located on the second surface 2 b of the insulating substrate 2. The first external electrode 4 may be located on one end of the second surface 2 b of the insulating substrate 2. The first external electrode 4 may be printed on the second surface 2 b of the insulating substrate 2 and baked by firing. The first external electrode 4 may extend from the second surface 2 b of the insulating substrate 2 to the side surface 2 c (including the corners between the multiple side surfaces 2 c). The first external electrode 4 may be electrically connectable to the first electrode of the mounting board via solder. The first external electrode 4 is made of a metal powder metallization containing tungsten (W), molybdenum (Mo), manganese (Mn), silver (Ag), copper (Cu), or the like as an ingredient.

[0018] As in the examples shown in Figures 2 and 4, the battery package 1 may include a second external electrode 5 located on the second surface 2b of the insulating substrate 2. The second external electrode 5 may be located on the other end side of the second surface 2b of the insulating substrate 2. The second external electrode 5 may be printed on the second surface 2b of the insulating substrate 2 and baked by firing. The second external electrode 5 may extend from the second surface 2b of the insulating substrate 2 to the side surface 2c. The second external electrode 5 may be electrically connectable to the second electrode of the mounting board via solder. The second external electrode 5 is made of the same metal powder metallization as the first external electrode 4.

[0019] 2 and 4 , the battery package 1 may include a first electrode 6 located on one end side of the mounting portion 21 of the insulating substrate 2. The first electrode 6 may be printed on the mounting portion 21 of the insulating substrate 2 and baked on by firing. The first electrode 6 is electrically connectable to one electrode portion 201 of two electrodes 201, 202 of the battery 200 mounted on the mounting portion 21 of the insulating substrate 2. The first electrode 6 may extend from the mounting portion 21 of the insulating substrate 2 to the boundary between the insulating substrate 2 and the insulating frame 3.

[0020] The first electrode 6 is electrically connected to the first external electrode 4 by a first connection wiring J1. The first connection wiring J1 may have a through conductor that penetrates one or more insulating layers and one or more wiring layers located between the insulating layers. The first electrode 6 and the first connection wiring J1 are made of the same metal powder metallization as the first external electrode 4, etc.

[0021] When the first electrode 6 extends to the boundary between the insulating substrate 2 and the insulating frame 3, the first electrode 6 is sandwiched between two insulating layers (the insulating substrate 2 and the insulating frame 3), resulting in superior bonding strength between the first electrode 6 and the insulating substrate 2. The through conductor of the first connection wiring J1 may penetrate from the mounting portion 21 of the insulating substrate 2 to the second surface 2b. In this case, the path from the battery 200 to the first external electrode 4 is short and has low resistance, thereby improving the efficiency of extracting power from the battery 200. The through conductor of the first connection wiring J1 may also be positioned so as to overlap the insulating frame 3 in a plan view (see FIG. 5). In this case, the strength of the battery package 1 can be improved even if the insulating substrate 2 is thin.

[0022] 2 and 4 , the battery package 1 may include a second electrode 7 located on the other end side of the mounting portion 21 of the insulating substrate 2. The second electrode 7 may be printed on the mounting portion 21 of the insulating substrate 2 and baked on by firing. The second electrode 7 is electrically connectable to the other electrode portion 202 of the two electrodes 201, 202 of the battery 200 mounted on the mounting portion 21 of the insulating substrate 2. The second electrode 7 may extend from the mounting portion 21 of the insulating substrate 2 to the boundary between the insulating substrate 2 and the insulating frame 3.

[0023] The second electrode 7 is electrically connected to the second external electrode 5 by a second connection wiring J2. The second connection wiring J2 may have a through conductor penetrating one or more insulating layers and one or more wiring layers located between the insulating layers. The second electrode 7 and the second connection wiring J2 are made of the same metal powder metallization as the first external electrode 4, etc.

[0024] When the second electrode 7 extends to the boundary between the insulating substrate 2 and the insulating frame 3, the second electrode 7 is sandwiched between two insulating layers (the insulating substrate 2 and the insulating frame 3), which provides excellent bonding strength between the second electrode 7 and the insulating substrate 2. In addition, the second electrode 7 does not have to extend to the boundary between the insulating substrate 2 and the insulating frame 3.

[0025] The through conductor of the second connection wiring J2 may penetrate from the mounting portion 21 to the second surface 2b of the insulating substrate 2. In this case, the path from the battery 200 to the second external electrode 5 is short and has low resistance, thereby improving the efficiency of extracting power from the battery 200. Furthermore, the through conductor of the second connection wiring J2 may be positioned so as to overlap with the insulating frame 3 in a plan view (see FIG. 5). In this case, the strength of the battery package 1 can be improved even if the insulating substrate 2 is thin.

[0026] As shown in the examples of FIGS. 1 to 4 , the battery package 1 may include a metal frame 8 as an example of an upper frame located on the upper surface of the insulating frame 3. When the metal frame 8 and the insulating frame 3 are joined with a brazing material, a frame-shaped metal film F may be located on the upper surface of the insulating frame 3. The frame-shaped metal film F is made of the same metal powder metallization as the first external electrode 4, etc. As a constituent material of the metal frame 8, it is preferable to use a material that has a small thermal expansion difference with ceramics, such as an iron-nickel (Fe—Ni) alloy or an iron-nickel-cobalt (Fe—Ni—Co) alloy. The battery package 1 may include a second insulating frame made of ceramic instead of the metal frame 8 as the upper frame located on the upper surface of the insulating frame 3.

[0027] 3 and 4, the metal frame 8 may be omitted from the components of the battery package 1. In this case, the battery package 1 and the battery module 100 can be made thinner, while reducing the component costs and assembly costs of the battery package 1.

[0028] In the example shown in FIGS. 1 to 4 , when the insulating substrate 2 and insulating frame 3 are made of, for example, an aluminum oxide sintered body, the insulating substrate 2 and insulating frame 3 are fabricated as follows: A slurry is produced by adding an appropriate organic binder and solvent to raw material powders such as aluminum oxide and silicon oxide. This slurry is then formed into a sheet using a doctor blade method, a calendar roll method, or the like to produce a ceramic green sheet for the insulating layer. The ceramic green sheet for the insulating layer is then punched appropriately to form holes, such as the receiving space 3s for the insulating frame 3. A plurality of ceramic green sheets for the insulating layer are then stacked to produce a laminate. The laminate is then fired at a high temperature (approximately 1300 to 1600°C) to produce the insulating substrate 2 and insulating frame 3.

[0029] When the first external electrode 4, the second external electrode 5, the first electrode 6, the first connection wiring J1, the second electrode 7, the second connection wiring J2, and the frame-shaped metal film F are, for example, metallized layers of tungsten, they can be formed as follows. The first external electrode 4, the second external electrode 5, the first electrode 6, the wiring layer of the first connection wiring J1, the second electrode 7, the wiring layer of the second connection wiring J, and the frame-shaped metal film F are formed by printing a metal paste, which is made by mixing tungsten powder with an organic solvent and an organic binder, at predetermined positions on ceramic green sheets for insulating layers by a method such as screen printing, and then firing the laminate. The through conductors of the first connection wiring J1 and the second connection wiring J2 are formed by providing through conductor holes at predetermined positions on the ceramic green sheets for insulating layers and filling the through conductor holes with metal paste.

[0030] The surfaces of the first external electrode 4, the second external electrode 5, the first electrode 6, the first connection wiring J1, the second electrode 7, the second connection wiring J2, and the frame-shaped metal film F that are exposed to the outside may be coated with a metal plating layer of nickel / gold by a plating method such as electrolytic plating or electroless plating. This effectively reduces corrosion of the first external electrode 4, the second external electrode 5, etc. The metal plating layer is not limited to a nickel / gold plating layer, but may be other metal plating layers including a nickel / palladium / gold plating layer, etc.

[0031] 2 and 4 , the battery package 1 may include a flat lid 9 that closes the opening (opening side) of the metal frame 8. The lid 9 may close the opening (opening side) of the insulating frame 3, or may cover the battery 200. The lid 9 may be bonded to the metal frame 8 or the insulating frame 3. The lid 9 may be located on the first surface 2a side of the insulating substrate 2 via the insulating frame 3 or the like. The lid 9 may be electrically insulated from the first electrode 6 and the second electrode 7.

[0032] As shown in the examples of Figures 2 and 4, the battery package 1 may include a lid located on the first surface 2a of the insulating substrate 2 and covering the battery 200. The lid 9 may be electrically insulated from the first electrode 6 and the second electrode 7. As shown in the example of Figure 4, the lid 9 may cover the opening (opening side) of the insulating frame 3 on the first surface 2a of the insulating substrate 2. As shown in the example of Figure 2, the lid 9 may cover the opening (opening side) of the metal frame 8 on the insulating frame 3. The lid 9 covering the opening (opening side) of the insulating frame 3 or the metal frame 8 may be flat. The lid 9 may be bonded to the frame-shaped metal film F on the metal frame 8 or the insulating frame 3.

[0033] The shape of the lid body 9 in a plan view may be, for example, rectangular. The lid body 9 is made of, for example, ceramics or metal. The material of the lid body 9 may be a material that has a small difference in thermal expansion with ceramics, such as an iron-nickel (Fe-Ni) alloy or an iron-nickel-cobalt (Fe-Ni-Co) alloy. As long as the lid body 9 can close the opening of the insulating frame 3 (metal frame 8), the shape of the lid body 9 in a plan view may be a shape other than rectangular.

[0034] The lid body 9 and the metal frame 8 may be joined using a joining material such as a brazing material. The lid body 9 and the metal frame 8 may be joined using glass or a brazing material as a joining material in order to increase the airtightness of the battery module 100. When the lid body 9 made of ceramics and the metal frame 8 are joined using a brazing material, a metal film having the same configuration as the frame-shaped metal film F may also be located on the underside of the lid body 9.

[0035] The metal lid 9 and the metal frame 8 may be joined by welding, such as seam welding or laser welding, to improve the airtight sealing of the battery module 100. If the metal frame 8 is omitted from the configuration of the battery package 1, the metal lid 9 may be joined to the frame-shaped metal film F by welding, such as direct seam welding, laser welding, or electron beam welding, solder joining, or brazing. Joining using seam welding, direct seam welding, laser welding, or electron beam welding involves localized heating of the joint, and therefore reduces the thermal impact on the battery 200 compared to using brazing, which involves overall heating (reflow heating).

[0036] When the lid 9 is made of ceramic, the lid 9 and the insulating frame 3 can be joined by soldering, brazing, frit glass, or resin. In the case of soldering or brazing, a frame-shaped metal film F is disposed on the insulating frame 3.

[0037] The battery module 100 may be hermetically sealed in a low dew point atmosphere such as a nitrogen atmosphere, an argon atmosphere, or a vacuum atmosphere. By hermetically sealing the battery module 100, it is possible to reduce the risk of moisture, oxygen, and the like, which deteriorate the battery material of the battery 200, entering the storage space 3s from the outside of the battery package 1. By hermetically sealing the battery module 100 in a nitrogen atmosphere, an argon atmosphere, or a vacuum atmosphere, it is possible to remove moisture and oxygen, which deteriorate the battery material of the battery 200, from the storage space 3s of the battery package 1 to the maximum extent possible.

[0038] In particular, when the operating temperature of the battery 200 is −20° C. to 100° C., the battery module 100 may be hermetically sealed in a vacuum atmosphere of 10 Pa or less. When the operating temperature of the battery 200 is −50° C. to 120° C., the battery module 100 may be hermetically sealed in a vacuum atmosphere of 1 Pa or less. －１ From 10 －５ The battery 200 may be hermetically sealed at a high vacuum of 1000 W or less. By increasing the degree of vacuum and sealing, the moisture present in the package can be minimized, and at the same time, condensation inside the package can be reduced even if a temperature change occurs in the sealed battery 200. As a result, not only is adhesion of moisture to the elastic member reduced and deterioration suppressed, but also deterioration of battery performance due to reaction of moisture (particularly hydrogen ions) with battery materials (such as Li ions) can be reduced.

[0039] If the battery module 100 cannot be hermetically sealed in a vacuum atmosphere, it may be hermetically sealed in a nitrogen or argon atmosphere with a dew point of −40° C. or lower, and the nitrogen or argon gas atmosphere preferably has a dew point of −40° C. or lower. Since a nitrogen or argon atmosphere with a dew point of −40° C. corresponds to a vacuum atmosphere of about 10 Pa, even in this case, the risk of moisture adhesion to the battery 200 or elastic member due to condensation or the like can be reduced, and the durability of the battery module 100 can be increased.

[0040] Furthermore, before sealing the battery module 100, moisture inside the battery package 1 may be evaporated by pre-baking (heating). The pre-baking temperature may be equal to or higher than the temperature of the overall heating (reflow heating). In this way, by hermetically sealing after pre-baking, gases trapped in the walls of the storage space 3s of the battery package 1 can be released in advance, thereby reducing moisture, oxygen, and the like present in the storage space 3s of the battery package 1 after hermetically sealing.

[0041] Furthermore, the battery package 1 may be pre-baked with the internal space thereof reduced in pressure below atmospheric pressure. This lowers the boiling point of water, allowing water to evaporate at a lower temperature than under atmospheric pressure. This reduces the thermal impact on the battery 200, thereby reducing the risk of deterioration of the battery material of the battery 200.

[0042] 1 to 4 , the battery package 1 may include a coil spring 10 as an example of a pressing member that presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 with a downward elastic force (spring force). The coil spring 10 is an example of a metal spring that presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2, and is an example of an elastic member. The insulating portion 203 of the battery 200 is a portion between the two electrode portions 201, 202 of the battery 200. The coil spring is shown as an example of an elastic material, and any elastic material, regardless of material or shape, may be used, such as a leaf spring or sponge.

[0043] The coil spring 10, as an example of an elastic member, may be located between the lid 9 and the insulating portion 203 of the battery 200. The coil spring 10, as an example of an elastic member, may be pressed from above by the lid 9. The upper end of the coil spring 10, as an example of an elastic member, may be pressed against the back surface of the lid 9. The upper end of the coil spring 10, as an example of an elastic member, may be joined to the back surface of the lid 9. A portion of the lid 9 may be an elastic member that presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2. The movable range (expansion range) of the coil spring 10, as an example of an elastic member, may be 20% or more of the height (vertical dimension) of the coil spring 10 before elastic deformation so as to absorb manufacturing errors in the thickness of the battery 200 and the insulating frame 3. The coil spring 10 may press against the center of the battery 200 in a plan view. This allows the battery 200 to be more stably fixed.

[0044] 1 to 4 , the battery module 100 according to the first embodiment includes the battery package 1 according to the first embodiment and a battery 200 mounted on a mounting portion 21 of an insulating substrate 2 of the battery package 1. The battery 200 may be accommodated in an accommodating space 3s of an insulating frame 3. One electrode portion 201 of the battery 200 may be electrically connected to the first electrode 6. The other electrode portion 202 of the battery 200 may be electrically connected to the second electrode 7. Because the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1 and the battery module 100 can be surface-mounted on a mounting substrate.

[0045] According to the first embodiment, the cover 9 closes the opening of the insulating frame 3, and the downward elastic force of the coil spring 10 presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2, thereby mechanically fixing the battery 200 to the insulating substrate 2. Therefore, even if the battery module 100 is used for a long period of time, it is possible to reduce the risk of a decrease in the bonding strength of the battery 200 to the insulating substrate 2. As a result, according to the first embodiment, the battery 200 is less likely to peel off from the insulating substrate 2, and the connection reliability of the battery 200 and the long-term reliability of the battery module 100 can be improved (effect (1)).

[0046] Furthermore, the lid body 9 is electrically insulated from the first electrode 6 and the second electrode 7. Therefore, according to the example of the first embodiment, the risk of a short circuit between the lid body 9 and other components is reduced, and power can be efficiently extracted from the battery 200 without discharging from the lid body 9 to the outside (effect (2)).

[0047] When the battery package 1 includes an insulating frame 3 having a storage space 3s, the battery package 1 becomes more robust against external impact, further improving the connection reliability of the battery 200 and the long-term reliability of the battery module 100. In particular, when an internal space (gap) is provided between the rear surface of the lid 9 and the battery 200, the stress on the coil spring 10 can be alleviated even if the battery 200 expands (effect (3)). The depth of the storage space 3s shown in FIG. 2 is shallower than the thickness (height) of the battery 200. The depth of the storage space 3s shown in FIG. 4 is deeper than the thickness of the battery 200. As in the example shown in FIG. 4, when the depth of the storage space 3s is deeper than the thickness of the battery 200, the possibility of a short circuit between the electrodes 201, 202 of the battery 200 and the lid 9 via the frame-shaped metal film F and the metal frame 8 is reduced when the battery 200 is misaligned.

[0048] A battery package 1 and a battery module according to another aspect of the first embodiment will be described with reference to Figures 5 to 10. Figures 5 to 10 are schematic cross-sectional views showing a battery package 1 and a battery module 100 according to another aspect of the first embodiment.

[0049] 5 to 7 , the battery package 1 may include a first support member 11 that supports one electrode portion 201 of two electrode portions 201, 202 of the battery 200 from below. The first support member 11 may be located on one end side of the mounting portion 21 of the insulating substrate 2. The first support member 11 may be electrically connected to the first electrode 6. The first support member 11 may be elastically deformable in the vertical direction.

[0050] The battery package 1 may include a second support member 12 that supports the other electrode portion 202 of the two electrode portions 201, 202 of the battery 200 from below. The second support member 12 may be located on the other end side of the mounting portion 21 of the insulating substrate 2. The second support member 12 may be electrically connected to the second electrode 7. The second support member 12 may be elastically deformable in the vertical direction.

[0051] As shown in the example of Fig. 5, the first support member 11 and the second support member 12 may each be a leaf spring. As shown in the example of Fig. 6, the first support member 11 and the second support member 12 may each be a coil spring. As shown in the example of Fig. 7, the first support member 11 and the second support member 12 may each be an elastic conductive sheet, rubber, or sponge (such as graphene meso sponge) as long as the material is a conductive material.

[0052] When the battery package 1 includes the first support member 11 and the second support member 12, even if the insulating substrate 2 warps upward in a convex shape, the first support member 11 and the second support member 12 can elastically deform in accordance with the warping of the insulating substrate 2, thereby absorbing the warping of the insulating substrate 2. Therefore, according to another example of the first embodiment, the connection state between one electrode portion 201 of the battery 200 and the first electrode 6, and the connection state between the other electrode portion 202 of the battery 200 and the second electrode 7 can be made more stable, and the connection reliability of the battery 200 can be further improved.

[0053] 5, even when a metal frame 8 is provided, the storage space 3s may be made deeper as in the case of FIG. 4. For example, the depth of the storage space 3s may be such that the battery 200 is located below the opening of the insulating frame 3 when the coil spring 10, the first support member 11, and the second support member 12 are in a compressed state due to sealing with the lid 9. This reduces the possibility of a short circuit between the electrodes 201, 202 of the battery 200 and the lid 9 via the frame-shaped metal film F and the metal frame 8.

[0054] 6, the frame-shaped metal film F may be disposed at a position away from the opening of the storage space 3s, thereby reducing the possibility of a short circuit between the electrodes 201, 202 and the lid 9 even if the electrodes 201, 202 of the battery 200 protrude from the opening.

[0055] 6 and 7 , the insulating substrate 2 may have a partition 22 that separates the accommodation space 3s of the insulating frame 3 into a first accommodation region for accommodating the first support member 11 and a second accommodation region for accommodating the second support member 12. The partition 22 of the insulating substrate 2 may be located in the center of the mounting portion 21.

[0056] When the insulating substrate 2 has the partition portion 22, it is possible to reduce misalignment of the first support member 11 with respect to the first surface 2 a of the insulating substrate 2, and misalignment with respect to the first surface 2 a of the insulating substrate 2. Therefore, according to another example of the first embodiment, the first support member 11 and the second support member 12 can stably support the two electrode portions 201, 202 of the battery 200.

[0057] 8 , the first electrode 6 may have a first bump 61 that contacts one electrode portion 201 of a pair of electrode portions 201, 202 of the battery 200. The second electrode 7 may have a second bump 71 that contacts the other electrode portion 202 of the pair of electrode portions 201, 202 of the battery 200. The first bump 61 and the second bump 71 are made of the same metal powder metallization as the first external electrode 4, etc., and can be easily formed by metallization printing. The thickness (height) of the first bump 61 and the second bump 71 is approximately 10 μm to 100 μm.

[0058] When the first electrode 6 has the first bump 61 and the second electrode 7 has the second bump 71, even if the insulating substrate 2 is warped in an upwardly convex shape, the connection state between one electrode portion 201 of the battery 200 and the first electrode 6, and the connection state between the other electrode portion 202 of the battery 200 and the second electrode 7 can be stabilized. Therefore, according to another example of the first embodiment, the connection reliability of the battery 200 can be further improved.

[0059] As shown in the examples of Figures 9 and 10, the insulating substrate 2 may have a recess 23 opening to the first surface 3a. The recess 23 of the insulating substrate 2 may be located between the first electrode 6 and the second electrode 7. Furthermore, as shown in the example of Figure 10, the battery package 1 may include a support member 13 that supports the insulating portion 203 of the battery 200 from below. The support member 13 may be located within the recess 23 of the insulating substrate 2. The support member 13 may be bonded to the bottom surface of the recess 23 of the insulating substrate 2. The support member 13 may be elastically deformable in the vertical direction. As shown in the example of Figure 10, the support member 13 may be a leaf spring. The support member 13 may also be an elastic member other than a leaf spring, such as a coil spring or rubber.

[0060] When the recess 23 of the insulating substrate 2 is located between the first electrode 6 and the second electrode 7, even if the insulating substrate 2 is warped upward in a convex shape, the battery 200 can be easily mounted on the mounting portion 21 of the insulating substrate 2. This makes it possible to improve the assembly efficiency of the battery module 100 according to another example of the first embodiment.

[0061] When the battery package 1 includes the support member 13, the elastic deformation of the support member 13 can reduce the impact on the battery 200 when the battery 200 is mounted on the mounting portion 21 of the insulating substrate 2. This makes it possible to further improve the assembly efficiency of the battery module 100 according to another example of the first embodiment.

[0062] Second Embodiment A battery package 1A and a battery module 100A according to a second embodiment will be described with reference to FIGS. 11 to 14 . FIG. 11 is a schematic plan view showing the battery package 1A and the battery module 100A according to the second embodiment. FIG. 12 is a schematic cross-sectional view taken along line XII-XII in FIG. 11 . FIG. 13 is a schematic plan view showing the battery package 1A and the battery module 100A according to the second embodiment, in which the arrangement of the leaf springs 14 is modified. FIG. 14 is a schematic cross-sectional view taken along line XIV-XIV in FIG. 13 . FIGS. 11 and 13 show the battery package 1A and the battery module 100A with the lid 9 removed, and the lid 9 is indicated by a two-dot chain line in FIGS. 11 and 13 .

[0063] As shown in the example of Figures 11 to 14, a battery module 100A according to the second embodiment includes a battery package 1A according to the second embodiment and a battery 200 mounted in the battery package 1. The battery package 1A according to the second embodiment has the same configuration as the battery package 1 according to the first embodiment, except for some components. Of the configuration of the battery package 1A according to the second embodiment, configurations that differ from the battery package 1 according to the first embodiment will be described. For ease of explanation, components that have the same functions as the components described in the first embodiment will be denoted by the same reference numerals.

[0064] 11 to 14 , the battery package 1A may include a leaf spring 14 as an example of a pressing member that uses a downward elastic force (spring force) to press the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2. The leaf spring 14 is an example of a metal spring that presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2, and is an example of an elastic member.

[0065] The leaf spring 14 may be located inside the metal frame 8 on the opening side of the storage space 3s of the insulating frame 3. The leaf spring 14 may have a pressure contact portion 14a located in its center and in pressure contact with the insulating portion 203 of the battery 200. The leaf spring 14 may have a curved portion 14b located between the center and an end portion and curved upward in a convex shape. The curved portion 14b of the leaf spring 14 may also be pressed from above by the lid 9. The end side of the leaf spring 14 may be located inside the metal frame 8 on the top surface of the insulating frame 3.

[0066] The movable range (expansion range) of the leaf spring 14, which is an example of an elastic member, may be 20% or more of the height (vertical dimension) of the leaf spring 14 before elastic deformation so as to absorb manufacturing errors in the thickness of the battery 200 and the insulating frame 3. The height of the leaf spring 14 before elastic deformation may be approximately 0.1 mm to 1.0 mm.

[0067] As shown in the examples of Figures 11 and 12 , the leaf spring 14 may be arranged inside the metal frame 8 along the arrangement direction of the two electrodes 201, 202 of the battery 200. As shown in the example of Figure 11 , the leaf spring 14 may be arranged so as to overlap the two electrodes 201, 202 and the insulating portion 203 of the battery 200 in a plan view. As shown in the examples of Figures 13 and 14 , the leaf spring 14 may be arranged inside the metal frame 8 in a direction perpendicular to the arrangement direction of the two electrodes 201, 202 of the battery 200. As shown in the example of Figure 13 , the leaf spring 14 may be arranged so as to be located between the two electrodes 201, 202 of the battery 200 and overlap the insulating portion 203 of the battery 200 in a plan view.

[0068] The leaf springs 14 may be made of a non-conductive elastic material. The leaf springs 14 may be made of non-conductive ceramic or plastic, in which case there will be no short circuit between the lid 9 and the battery 200. In particular, when the leaf springs 14 are made of non-conductive ceramic, the heat resistance of the leaf springs 14 is high, which can improve the long-term reliability of the battery module 100A.

[0069] 11 to 14 , a battery module 100A according to the second embodiment includes a battery package 1A according to the second embodiment and a battery 200 mounted on a mounting portion 21 of an insulating substrate 2 of the battery package 1A. The battery 200 may be accommodated in an accommodating space 3s of an insulating frame 3. One electrode portion 201 of the battery 200 may be electrically connected to the first electrode 6. The other electrode portion 202 of the battery 200 may be electrically connected to the second electrode 7. Because the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1A and the battery module 100A can be surface-mounted on a mounting substrate.

[0070] According to the second embodiment, the cover 9 closes the opening of the insulating frame 3, and the downward elastic force of the leaf spring 14 presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2, thereby mechanically fixing the battery 200 to the insulating substrate 2. This reduces the risk of a decrease in the bonding strength of the battery 200 to the insulating substrate 2 even after the battery module 100 has been in use for a long time. As a result, according to the second embodiment, the battery 200 is less likely to peel off from the insulating substrate 2, and the connection reliability of the battery 200 and the long-term reliability of the battery module 100A can be improved.

[0071] When the leaf spring 14 has the pressure contact portion 14a and the curved portion 14b, the pressure contact portion 14a of the leaf spring 14 is in pressure contact with the insulating portion 203 of the battery 200 with the end side of the leaf spring 14 in contact with the upper surface of the insulating frame 3 and the curved portion 14b of the leaf spring 14 pressed against the lid 9. This allows the elastic force of the leaf spring 14 to be effectively exerted, stabilizing the fixed state of the battery 200 to the insulating substrate 2. As a result, according to the example of the second embodiment, the connection reliability of the battery 200 and the long-term reliability of the battery module 100A can be further improved.

[0072] In addition, the second embodiment also achieves the same effects as the above-described effects (2) and (3).

[0073] A battery package 1A and a battery module 100A according to another aspect of the second embodiment will be described with reference to Figures 15 to 21. Figures 15 to 21 are schematic cross-sectional views showing a battery package 1A and a battery module 100A according to another aspect of the second embodiment.

[0074] As shown in the examples in FIGS. 15 and 16 , the insulating frame 3 may have a recessed step 31 on its opening side. The end of the leaf spring 14 may contact the bottom surface 31 a of the recessed step 31 of the insulating frame 3. The recessed step 31 of the insulating frame 3 may be annular. The recessed step 31 of the insulating frame 3 may be located on two opposing sides of the four sides of the opening side of the insulating frame 3 that contact the end of the leaf spring 14. The recessed step 31 of the insulating frame 3 does not have to be located over the entire edge of the opening side of the insulating frame 3, as long as it has a width large enough to accommodate the end of the leaf spring 14. Furthermore, as shown in the example in FIG. 16 , the end of the leaf spring 14 may be curved in an arc and may be located from the bottom surface 31 a of the recessed step 31 of the insulating frame 3 to the inner surface 31 i.

[0075] When the end side of the leaf spring 14 contacts the recessed step 31 of the insulating frame 3, the movement of the end side of the leaf spring 14 is restricted by the recessed step 31 of the insulating frame 3, thereby allowing the elastic force of the leaf spring 14 to be fully exerted and making it possible to more stably fix the battery 200 to the insulating substrate 2. As a result, according to another example of the second embodiment, it is possible to further improve the connection reliability of the battery 200 and the long-term reliability of the battery module 100A.

[0076] When the end side of the leaf spring 14 is bent in an arc shape, the end side of the leaf spring 14 does not get caught on the edge of the opening side of the accommodation space 3s of the insulating frame 3, and the leaf spring 14 can be positioned inside the metal frame 8. As a result, according to another example of the second embodiment, the assembly of the battery module 100A can be improved.

[0077] As shown in the example in FIG. 17 , the curved portion 14b of the leaf spring 14 may contact the back surface of the metal lid body 9 via an insulating sheet IS, which is an example of an insulating material. Part or all of the surface of the leaf spring 14 may be coated with an insulating material. An insulating material may be disposed between the leaf spring 14 and the battery 200. In these cases, the leaf spring 14 and the lid body 9 can be electrically insulated. Therefore, according to another aspect of the second embodiment, even if the pressure contact portion 14a of the leaf spring 14 is short-circuited to one of the two electrodes 201, 202 of the battery 200, the lid body 9 does not discharge electricity to the outside, and power can be efficiently extracted from the battery 200.

[0078] As shown in the example of FIG. 18 , instead of the leaf spring 14 having the curved portion 14 b, the leaf spring 14 may have both ends thereof engaged with a portion of the metal frame 8 from below, thereby exerting a downward elastic force (spring force). Instead of both ends of the leaf spring 14 being engaged with a portion of the metal frame 8 from below, the leaf spring 14 may be engaged with a portion of the insulating frame 3 from below. With this configuration, the battery 200 can be fixed by the leaf spring 14 before the lid 9 is joined, so that the lid 9 can be joined after confirming that the battery 200 is fixed by the leaf spring 14. Furthermore, an insulating member may be disposed between the leaf spring 14 and the metal frame 8. Part or all of the surface of the leaf spring 14 may be coated with an insulating member. An insulating member may be disposed between the leaf spring 14 and the battery 200.

[0079] In these cases, both ends of the leaf spring 14 are engaged from below with a part of the metal frame 8 or a part of the insulating frame 3, so that the pressure contact portion 14a of the leaf spring 14 is brought into pressure contact with the insulating portion 203 of the battery 200. This allows the elastic force of the leaf spring 14 to be effectively exerted, stabilizing the fixed state of the battery 200 relative to the insulating substrate 2. As a result, according to the example of the second embodiment, the connection reliability of the battery 200 and the long-term reliability of the battery module 100A can be further improved.

[0080] 19 , instead of the leaf spring 14 having the curved portion 14b, the end side of the leaf spring 14 may be bent into a horizontal U-shape. The end side of the leaf spring 14 may be located on the upper surface of the insulating frame 3. The end side of the leaf spring 14 may be pressed from above by the cover 9.

[0081] When the end of the leaf spring 14 is bent into a horizontal U-shape, the pressure contact portion 14a of the leaf spring 14 is pressed against the insulating portion 203 of the battery 200 while the end of the leaf spring 14 is pressed by the lid 9. This allows the elastic force of the leaf spring 14 to be effectively exerted, stabilizing the fixed state of the battery 200 relative to the insulating substrate 2. As a result, according to the second embodiment, the connection reliability of the battery 200 and the long-term reliability of the battery module 100A can be further improved.

[0082] As shown in the example of Figure 20, instead of the leaf spring 14 having the curved portion 14b, the end side of the leaf spring 14 may be pressed from above by the cover body 9 via an insulating ring IR as an example of an insulating member.

[0083] In this case, the end of the leaf spring 14 is pressed by the cover 9 via the insulating ring IR, and the pressure contact portion 14a of the leaf spring 14 is pressed against the insulating portion 203 of the battery 200. This allows the elastic force of the leaf spring 14 to be effectively exerted, stably fixing the battery 200 to the insulating substrate 2. As a result, according to the second embodiment, the connection reliability of the battery 200 and the long-term reliability of the battery module 100A can be further improved. Furthermore, as shown in FIG. 20 , a notch may be formed in the underside of the insulating ring IR to limit lateral displacement of the leaf spring 14.

[0084] 21 , instead of the leaf spring 14 having the curved portion 14b, the end side of the leaf spring 14 may be pressed from above by the cover 9. The end side of the leaf spring 14 may be joined to the rear surface of the cover 9.

[0085] When the end of the leaf spring 14 is joined to the back surface of the lid 9, it is possible to prevent the leaf spring 14 from shifting relative to the lid 9. This effectively utilizes the elastic force of the leaf spring 14 to stabilize the fixed state of the battery 200 relative to the insulating substrate 2 and reduce the risk of electrical conduction between the electrodes 201, 202 of the battery 200 and the lid 9. As a result, according to the second embodiment, it is possible to further improve the connection reliability of the battery 200 and the long-term reliability of the battery module 100A. Alternatively, a protrusion or the like may be provided on the back surface of the lid 9 to limit lateral movement of the leaf spring 14.

[0086] Additionally, the configurations shown in FIGS. 5 to 10 may also be applied to the battery package 1A according to the second embodiment.

[0087] A method for sealing a battery module according to the second embodiment will be described with reference to Fig. 22. Fig. 22 is a schematic cross-sectional view for explaining a method for sealing a battery module according to another aspect of the second embodiment.

[0088] 22 , the sealing method for a battery module according to the second embodiment is a method for sealing a battery module 100A, in which the battery module 100A is sealed while a metal lid 9 presses from above a leaf spring 14, which is an example of a pressing member, arranged on the upper surface of a battery 200. Specific details of the sealing method for a battery module 100A according to the second embodiment are as follows.

[0089] First, an example of seam welding sealing will be shown. The leaf spring 14 is placed on the upper surface of the battery 200 (the opening side of the insulating frame 3) so that the pressure contact portion 14a of the leaf spring 14 contacts the insulating portion 203 of the battery 200 and both end portions of the leaf spring 14 contact the upper surface of the insulating frame 3. Next, the battery package 1A is placed in a chamber filled with an inert gas such as nitrogen or argon using a baking device and pre-baked at a temperature of 100°C or higher to evaporate the moisture inside the battery package 1A. The battery package 1A may be pre-baked with the internal space of the battery package 1A reduced in pressure below atmospheric pressure.

[0090] Thereafter, in a nitrogen or argon atmosphere with a dew point of −40° C. or lower, the metal lid body 9 is brought into contact with the curved portion 14 b of the leaf spring 14, and the pusher PP presses the lid body 9 downward, thereby pressing the leaf spring 14 from above with the back surface of the lid body 9 in contact with the upper surface of the metal frame 8. With the lid body 9 pressing the leaf spring 14, spot welding is performed on a portion of the peripheral edge of the lid body 9 using a roller electrode RE, thereby joining the portion to the upper surface of the metal frame 8. Furthermore, seam welding is performed around the entire peripheral edge of the lid body 9 using the roller electrode RE, thereby joining the entire peripheral edge of the lid body 9 to the upper surface of the metal frame 8. This allows the battery module 100A to be sealed while the lid body 9 is pressed by the leaf spring 14. Instead of sealing the battery module 100A in a nitrogen or argon atmosphere with a dew point of −40° C. or less, the battery module 100A may be sealed in a vacuum atmosphere of 10 Pa or less.

[0091] The above describes an example of a sealing method for the structure of Figure 22, but even in the case of other structures or other sealing forms, the battery module 100A can be hermetically sealed by pressing the leaf spring 14, which is an example of an elastic member, with the lid body 9.

[0092] According to the battery module sealing method of the second embodiment, the battery module 100A is sealed while the lid body 9 presses the leaf spring 14 from above, so that the battery module 100A can be easily sealed while maintaining the airtightness of the battery module 100A, thereby improving the assembly ease of the battery module 100A.

[0093] The battery module sealing method according to the second embodiment may be applied to sealing not only the battery module 100A but also the battery module 100 described above and the battery module 100B (100C, 100D) described below.

[0094] Third Embodiment A battery package 1B and a battery module 100B according to a third embodiment will be described with reference to Fig. 23 and Fig. 24 . Fig. 23 is a schematic plan view showing a battery package 1B and a battery module 100B according to the third embodiment. Fig. 23 shows a state in which the lid 9 has been removed, and the lid 9 is indicated by a two-dot chain line in Fig. 23 . Fig. 24 is a schematic cross-sectional view taken along line XXIV-XXIV in Fig. 23 .

[0095] As shown in the example of Figures 23 and 24, a battery module 100B according to the third embodiment includes a battery package 1B according to the third embodiment and a battery 200 mounted in the battery package 1B. The battery package 1B according to the third embodiment has the same configuration as the battery package 1 according to the first embodiment, except for some components. Among the configurations of the battery package 1B according to the third embodiment, those components that differ from the battery package 1 according to the first embodiment will be described. For ease of explanation, the same reference numerals will be used to designate components that have the same functions as the components described in the first embodiment.

[0096] 23 and 24 , the battery package 1B may include a rubber plate 15 as an example of a pressing member that presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 by a downward elastic force (spring force). The rubber plate 15 may be located on the back surface side of the lid 9. The rubber plate 15 may be bonded to the back surface of the lid 9. The rubber plate 15 may be sandwiched between the back surface of the lid 9 and the insulating portion 203 of the battery 200. The rubber plate 15 may be porous or non-conductive.

[0097] 23 and 24 , a battery module 100B according to the third embodiment includes a battery package 1B according to the third embodiment and a battery 200 mounted on a mounting portion 21 of an insulating substrate 2 of the battery package 1B. The battery 200 may be accommodated in an accommodating space 3s of an insulating frame 3. One electrode portion 201 of the battery 200 may be electrically connected to the first electrode 6. The other electrode portion 202 of the battery 200 may be electrically connected to the second electrode 7. Because the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1B and the battery module 100B can be surface-mounted on a mounting substrate.

[0098] According to the third embodiment, the cover 9 closes the opening side of the insulating frame 3, and the downward elastic force of the rubber plate 15 presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2, thereby mechanically fixing the battery 200 to the insulating substrate 2. Therefore, even if the battery module 100B is used for a long period of time, it is possible to reduce the risk of a decrease in the bonding strength of the battery 200 to the insulating substrate 2. As a result, according to the third embodiment, the battery 200 is less likely to peel off from the insulating substrate 2, and it is possible to improve the connection reliability of the battery 200 and the long-term reliability of the battery module 100B.

[0099] In addition, the third embodiment also achieves the same effects as the above-described effects (2) and (3).

[0100] [Fourth Embodiment] A battery package 1B and a battery module 100B according to a third embodiment will be described with reference to Fig. 25 and Fig. 26. Fig. 25 is a schematic plan view showing a battery package 1C and a battery module 100C according to a fourth embodiment. Fig. 25 shows a state in which the lid body 9 has been removed, and the lid body 9 is indicated by a two-dot chain line in Fig. 25. Fig. 26 is a schematic cross-sectional view taken along line XXV-XXV in Fig. 25.

[0101] 25 and 26 , a battery module 100C according to the fourth embodiment includes a battery package 1C according to the fourth embodiment and a battery 200 mounted in the battery package 1C. The battery package 1C according to the fourth embodiment has the same configuration as the battery package 1 according to the first embodiment, except for some components. The following describes the configuration of the battery package 1C according to the fourth embodiment that differs from the battery package 1 according to the first embodiment. For ease of explanation, the same reference numerals are used for components that have the same functions as the components described in the first embodiment.

[0102] As shown in the examples of Figures 25 and 26, the lid body 9 may have a protrusion 91 that protrudes downward. The protrusion 91 of the lid body 9 may press the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 with a downward elastic force. In other words, the protrusion 91 of the lid body 9 may correspond to a pressing member that presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 with a downward elastic force. The protrusion 91 may be located in the center of the lid body 9. The protrusion 91 may be a curved portion that curves a portion of the flat lid body 9 downward. The protrusion 91 may be a thick portion that thickens a portion of the lid body 9. The protrusion 91 may be a protrusion bonded to the back surface of the lid body 9.

[0103] As shown in the example in FIG. 26 , the protrusion 91 of the lid 9 may be inverted upside down to press the battery 200 from above toward the mounting portion 21 of the insulating substrate 2. Specifically, after joining the lid 9, the upwardly protruding protrusion 91 may be inverted downward, so that the inverted protrusion 91 presses the battery 200 from above toward the mounting portion 21 of the insulating substrate 2. In FIG. 26 , the protrusion 91 of the lid 9 before inversion is shown by a two-dot chain line. The internal space of the battery package 1C, including the storage space 3s, may be sealed in a state where the pressure is reduced below atmospheric pressure so that the protrusion 91 of the lid 9 can be easily inverted upside down. The lid 9 having the protrusion 91 may be fabricated by stamping a metal plate. The lid 9 having the protrusion 91 may be fabricated by stamping and pressing a metal plate.

[0104] 25 and 26 , a battery module 100C according to the fourth embodiment includes a battery package 1C according to the fourth embodiment and a battery 200 mounted on a mounting portion 21 of an insulating substrate 2 of the battery package 1C. The battery 200 may be accommodated in an accommodating space 3s of an insulating frame 3. One electrode portion 201 of the battery 200 may be electrically connected to the first electrode 6. The other electrode portion 202 of the battery 200 may be electrically connected to the second electrode 7. Because the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1C and the battery module 100C can be surface-mounted on a mounting substrate.

[0105] According to the fourth embodiment, the lid 9 closes the opening of the insulating frame 3, and the protrusion 91 of the lid 9 is inverted upside down as needed. The downward elastic force of the protrusion 91 of the lid 9 presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2, mechanically fixing the battery 200 to the insulating substrate 2. This reduces the risk of a decrease in the bonding strength of the battery 200 to the insulating substrate 2, making the battery 200 less likely to peel off from the insulating substrate 2, even after the battery module 100C has been in use for a long period of time. Furthermore, because the protrusion 91 does not contact the battery 200 when the lid 9 is joined, heat during joining of the lid 9 and current during seam welding are less likely to be transmitted to the battery 200, reducing the risk of heat-induced deterioration of the battery 200. According to the fourth embodiment, the connection reliability of the battery 200 and the long-term reliability of the battery module 100C can be improved.

[0106] Furthermore, according to the fourth embodiment, the convex portion 91 of the lid 9 corresponds to a pressing member that uses a downward elastic force to press the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2. Therefore, according to the fourth embodiment, the number of parts in the battery package 1C and the battery module 100C can be reduced, and the configurations of the battery package 1C and the battery module 100C can be simplified.

[0107] In addition, the fourth embodiment also achieves the same effects as the above-described effects (2) and (3).

[0108] Fifth Embodiment A battery package 1D and a battery module 100D according to a fifth embodiment will be described with reference to Figures 27 and 28. Figure 27 is a schematic plan view showing a battery package 1D and a battery module 100D according to the fifth embodiment. Figure 27 shows a state in which a lid 9D is removed, and the lid 9D is indicated by a two-dot chain line in Figure 27. Figure 28 is a schematic cross-sectional view taken along line XXVIII-XXXVIII in Figure 27.

[0109] As shown in the example of Figures 27 and 28, a battery module 100D according to the fifth embodiment includes a battery package 1D according to the fifth embodiment and a battery 200 mounted in the battery package 1D. The battery package 1D according to the fifth embodiment has the same configuration as the battery package 1 according to the first embodiment, except for some components. Among the configurations of the battery package 1D according to the fifth embodiment, those components that differ from the battery package 1 according to the first embodiment will be described. For ease of explanation, the same reference numerals will be used to designate components that have the same functions as the components described in the first embodiment.

[0110] As shown in the examples of Figures 27 and 28, a battery package 1D may include a cup-shaped lid 9D instead of the insulating frame 3, metal frame 8, and flat lid 9. The lid 9D may be positioned so as to cover the mounting portion 21 on the first surface 2a side of the insulating substrate 2. The lid 9D may have an accommodation space 9Ds inside for accommodating the battery 200. When the metal lid 9D and the insulating substrate 2 are joined with a brazing material, a frame-shaped metal layer F may be positioned on the upper surface of the insulating substrate 2. The frame-shaped metal film F is made of the same metal powder metallization as the first external electrode 4, etc. The metal lid 9D can be produced by pressing a metal plate.

[0111] 27 and 28 , a battery module 100D according to the fifth embodiment includes the battery package 1D according to the fifth embodiment and a battery 200 mounted on the mounting portion 21 of the insulating substrate 2 of the battery package 1D. The battery 200 may be housed in the housing space 9Ds of the lid 9D. One electrode portion 201 of the battery 200 may be electrically connected to the first electrode 6. The other electrode portion 202 of the battery 200 may be electrically connected to the second electrode 7. Because the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1D and the battery module 100D can be surface-mounted on a mounting substrate.

[0112] According to the fifth embodiment, the cover 9D covers the mounting portion 21 of the insulating substrate 2, and the downward elastic force of the coil spring 10, which is an example of a pressing member, presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2, thereby mechanically fixing the battery 200 to the insulating substrate 2. Therefore, even if the battery module 100D is used for a long period of time, it is possible to reduce the risk of a decrease in the bonding strength of the battery 200 to the insulating substrate 2. As a result, according to the fifth embodiment, the battery 200 is less likely to peel off from the insulating substrate 2, and the connection reliability of the battery 200 and the long-term reliability of the battery module 100D can be improved.

[0113] According to the example of the fifth embodiment, since the lid body 9D has a storage space 9Ds, the insulating frame body 3 can be omitted from the configuration of the battery package 1D, thereby simplifying the configuration of the battery package 1D and reducing the manufacturing cost of the battery package 1D.

[0114] In addition, the fifth embodiment also achieves the same effect as the above-described effect (2).

[0115] A battery package 1D and a battery module 100D according to another aspect of the fifth embodiment will be described with reference to Figures 29 and 30. Figures 29 and 30 are schematic cross-sectional views showing a battery package and a battery module according to another aspect of the fifth embodiment.

[0116] As shown in the example in FIG. 29 , the lid 9D may have a protrusion 91D protruding downward from its center. The periphery of the protrusion 91D on the lid 9D may be elastically deformable. The protrusion 91D of the lid 9D may be displaceable in the vertical direction due to elastic deformation of the periphery. The protrusion 91D of the lid 9D may be elastically deformable in the vertical direction. The lid 9D may function as a pressing member that presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 with a downward elastic force. In this case, the protrusion 91D of the lid 9D may function as a pressure contact portion that presses the insulating portion 203 of the battery 200.

[0117] When the lid body 9D has a protrusion 91D, the lid body 9D covers the mounting portion 21 of the insulating substrate 2, and the protrusion 91D presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 with a downward elastic force, thereby mechanically fixing the battery 200 to the insulating substrate 2.

[0118] Furthermore, since the lid body 9D having the protrusion 91D corresponds to a pressing member, according to another example of the fifth embodiment, the number of parts of the battery package 1D can be reduced, thereby simplifying the configuration of the battery package 1D and reducing the manufacturing cost of the battery package 1D.

[0119] 30 , the lid 9D may be made of ceramics, just like the insulating substrate 2. The lid 9D made of ceramics may be made by firing a laminate of ceramic green sheets, just like the insulating substrate 2, or by pressing ceramic powder into a cup shape and firing it. The lid 9D may also have a recess 92D on its back side for accommodating part of a coil spring 10, which is an example of a pressing member.

[0120] When the lid body 9D has the recess 92D, it is easy to position the coil spring 10 relative to the lid body 9D. Therefore, even if the lid body 9D is cup-shaped or flat, according to another example of the fifth embodiment, the assembly of the battery module 100D can be improved.

[0121] As in the examples shown in Figures 27 to 30, the first surface 2a of the insulating substrate 2 is a flat surface, but the insulating substrate 2 may have a recess that opens onto the first surface 2a and is used to accommodate the battery 200.

[0122] Sixth Embodiment A battery package 1E and a battery module 100E according to a sixth embodiment will be described with reference to Fig. 31. Fig. 31 is a cross-sectional view of the battery package 1E according to the sixth embodiment.

[0123] As shown in the example of FIG. 31, a battery module 100E according to the sixth embodiment includes a battery package 1E according to the sixth embodiment and a battery 200 mounted in the battery package 1E.

[0124] 31 , a battery package 1E may include an insulating frame 3 and a cup-shaped lid 9E. A battery 200 may be housed in a space including the housing space 3s of the insulating frame 3 and the housing space 9Es of the lid 9E.

[0125] Lid 9E may be made of ceramics, similar to insulating substrate 2. Lid 9E made of ceramics may be formed by firing a laminate of ceramic green sheets, similar to insulating substrate 2, or by pressing ceramic powder into a cup shape and firing the pressed ceramic powder. Lid 9E may also have a recess 92E on its back side for accommodating leaf spring 14, which is an example of a pressing member.

[0126] Because the battery package 1E has an insulating frame 3, the height of the lid 9E is lower than, for example, the lid 9D shown in Fig. 30 . Also, because the battery package 1E has a lid 9E, the height of the insulating frame 3 is lower than, for example, the insulating frame 3 shown in Fig. 26 . Because the heights of the lid 9E and the insulating frame 3 can be reduced, the thickness (wall width) of the lid 9E and the insulating frame 3 can be reduced, thereby increasing the storage volume for the battery 200. In other words, the volumetric energy density of the battery module 100E can be improved.

[0127] The insulating frame 3 and the lid 9E can be joined using a hermetic sealable frit seal, AuSn seal, solder seal, etc. When frit seal is used to seal the insulating frame 3 and the lid 9E, the possibility of short-circuiting between the electrodes 201, 202 of the battery 200 can be reduced.

[0128] [Other Embodiments] The number of batteries 200 accommodated in the accommodation space 3s of the insulating frame 3 in the battery package 1 (1A to 1E) is not limited to one and may be multiple. The number of batteries 200 accommodated in the accommodation space 9Fs of the lid 9F in the battery package 1F is not limited to one and may be multiple.

[0129] Battery control semiconductor elements for controlling the battery 200 may be housed within the housing space 3s of the insulating frame 3 in the battery package 1 (1A-1E) and within the housing space 9Fs of the lid 9F in the battery package 1F. Battery control semiconductor elements include a DC / DC converter that supplies a constant power supply voltage, a reset IC that monitors the power supply, and a switch IC that turns the power supply on and off. Electronic components such as coils and capacitors may also be housed within the housing space 3s of the insulating frame 3 in the battery package 1 (1A-1E) and within the housing space 9Fs of the lid 9F in the battery package 1F.

[0130] The battery module 100 (100A to 100E) may include a desiccant that absorbs moisture. The desiccant may be located on the underside of the lid 9. The desiccant may be located between the inner surface of the insulating frame 3 and the side surface of the battery 200 in the battery module 100 (100A to 100C). For example, silica gel or calcium chloride may be used as the desiccant. When the battery module 100 (100A to 100E) includes a desiccant, deterioration of the battery material of the battery 200 due to chemical reactions with moisture can be suppressed.

[0131] In one embodiment, (1) an insulating substrate having a first surface, a second surface opposite the first surface, and a mounting portion located on the first surface side for mounting a battery including two electrode portions, a first external electrode located on the second surface, a second external electrode located on the second surface, a first electrode located on one end side of the mounting portion and electrically connected to the first external electrode, a second electrode located on the other end side of the mounting portion and electrically connected to the second external electrode, a lid body located on the first surface side, electrically insulated from the first electrode and the second electrode, and covering the battery, and a pressing member that presses the battery toward the mounting portion by elastic force.

[0132] (2) The battery package of (1) may further include a frame body positioned to surround the mounting portion on the first surface and having an accommodation space inside for accommodating the battery, and the lid body may close the opening side of the frame body.

[0133] (3) In the battery package of (1) or (2), the pressing member may be a metal spring.

[0134] (4) In the battery package of (2), the pressing member may be a leaf spring.

[0135] (5) The battery package of (4) may further include an upper frame body located on the upper surface side of the frame body and surrounding the open side of the frame body, and the leaf spring may have a pressure contact portion located in the center and pressing against the battery, and a curved portion located between the center and the end and curved convexly upward, the curved portion being pressed from above by the lid body, and the end side of the leaf spring may be located inside the upper frame body on the upper surface of the frame body.

[0136] (6) In the battery package of (5), the frame may have a recessed step on the opening side thereof, and the end side of the leaf spring may contact the bottom surface of the recessed step.

[0137] (7) In the battery package of (6), the end of the leaf spring may be bent into an arc and positioned from the bottom surface of the recessed step to the inner surface.

[0138] (8) In the battery package of (3), the lid may be made of metal, and the metal spring may be in contact with the lid via an insulating member.

[0139] (9) In any of the battery packages (4) to (7), an upper frame body may be further provided, which is located on the upper surface side of the frame body and surrounds the opening side of the frame body, and the leaf spring may exert elastic force by having both ends thereof engaged from below with a part of the frame body or a part of the upper frame body.

[0140] (10) In any of the battery packages (4) to (7), an upper frame body may be provided, located on the upper surface side of the frame body and surrounding the opening side of the frame body, the leaf spring having a pressure contact portion located in the center and pressure-contacting the battery, and the end side of the leaf spring may be bent into a horizontal U-shape, located on the upper surface of the frame body, and pressed from above by the lid body.

[0141] (11) In any of the battery packages (4) to (7), an upper frame body may be further provided, which is located on the upper surface side of the frame body and surrounds the open side of the frame body, the lid body is made of metal, the leaf spring has a pressure contact portion located in the center and pressure-contacting with an insulating portion of the battery, and the end side of the leaf spring may be located on the upper surface of the frame body and pressed from above by the lid body via an insulating member.

[0142] (12) In the battery package according to any one of (1) to (11), the lid may have a protrusion that protrudes downward, and the protrusion may correspond to the pressing member.

[0143] (13) In the battery package of (12) above, the protrusion may press the battery from above toward the mounting portion by turning the battery upside down.

[0144] (14) In any of the battery packages (2) to (13), the battery package may further include a first support member located on one end of the mounting portion, electrically connected to the first electrode, elastically deformable, and supporting one of the two electrode portions from below, and a second support member located on the other end of the mounting portion, electrically connected to the second electrode, elastically deformable, and supporting the other of the two electrode portions from below.

[0145] (15) In the battery package of (14), the insulating substrate may be located on the mounting portion and have a partition portion that separates the accommodation space into a first accommodation area for accommodating the first support member and a second accommodation area for accommodating the second support member.

[0146] (16) In the battery package according to any one of (1) to (15), the first electrode may have a first bump, and the second electrode may have a second bump.

[0147] (17) In the battery package according to any one of (1) to (16), the insulating substrate may have a recess that opens to the first surface and is located between the first electrode and the second electrode.

[0148] (18) The battery package of (17) may further include a support member that is located within the recess, is elastically deformable, and supports the battery from below.

[0149] (19) In the battery package of (1), the lid may be cup-shaped, positioned to cover the mounting portion on the first surface side, and have an accommodation space inside for accommodating the battery.

[0150] (20) In the battery package of (19), the lid may have a projection projecting downward from the center thereof, and the lid may correspond to the pressing member.

[0151] (21) In the battery package according to any one of (1) to (20), the lid may have a recess for accommodating a part of the pressing member.

[0152] (22) A battery module includes a battery package according to any one of (1) to (21) above, and a battery mounted on the mounting portion, one of the two electrode portions electrically connected to the first electrode, and the other of the two electrode portions electrically connected to the second electrode.

[0153] (23) A method for sealing a battery module is a method for sealing the battery module, in which the battery module is sealed while the pressing member arranged on the upper surface side of the battery is pressed by the lid body.

[0154] The invention according to the present disclosure has been described above based on the drawings and examples. However, the invention according to the present disclosure is not limited to the above-described embodiments. In other words, the invention according to the present disclosure can be modified in various ways within the scope of the present disclosure, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the invention according to the present disclosure. In other words, it should be noted that a person skilled in the art would easily be able to make various modifications or corrections based on the present disclosure. It should also be noted that these modifications or corrections are included in the scope of the present disclosure.

[0155] DESCRIPTION OF SYMBOLS 1 Battery package (battery package according to first embodiment) 2 Insulating substrate 2a First surface 2b Second surface 2c Side surface 21 Mounting portion 22 Partition portion 23 Recessed portion 3 Insulating frame (frame) 3s Storage space 4 First external electrode 5 Second external electrode 6 First electrode J1 First connection wiring 61 First bump 7 Second electrode J2 Second connection wiring 71 Second bump 8 Metal frame (upper frame) 9 Lid 10 Coil spring (pressing member) 11 First support member 12 Second support member 13 Support member 100 Battery module (battery module according to first embodiment) 200 Battery 201 Electrode portion 202 Electrode portion 203 Insulating portion 1A Battery package (battery package according to second embodiment) 14 Leaf spring (pressing member) 14a Pressure contact portion 14b Curved portion 31 Recessed step portion 31a Bottom surface 31i Inner surface 100A Battery module (battery module according to second embodiment) 1B Battery package (battery package according to third embodiment) 15 Rubber plate (elastic member) 100B Battery module (battery module according to third embodiment) 1C Battery package (battery package according to fourth embodiment) 91 Convex portion 100C Battery module (battery module according to fourth embodiment) 1D Battery package (battery package according to fifth embodiment) 9D Lid 9Ds Storage space 91D Protrusion 92D Depression 100D Battery module (battery module according to fifth embodiment) 1E Battery package (battery package according to sixth embodiment) 9E Lid 9Es Storage space 92E Depression 100E Battery module (battery module according to fifth embodiment)

Claims

1. an insulating substrate having a first surface, a second surface opposite to the first surface, and a mounting portion located on the first surface side for mounting a battery including two electrode portions; a first external electrode located on the second surface; a second external electrode located on the second surface; a first electrode located on one end side of the mounting portion and electrically connected to the first external electrode; a second electrode located on the other end side of the mounting portion and electrically connected to the second external electrode; a lid body that is located on the first surface side, is electrically insulated from the first electrode and the second electrode, and covers the battery; a pressing member that presses the battery toward the mounting portion by means of an elastic force.

2. a frame body positioned on the first surface so as to surround the mounting portion and having an accommodation space therein for accommodating the battery; The battery package according to claim 1 , wherein the lid closes the open side of the frame.

3. The battery package according to claim 1 , wherein the pressing member is a metal spring.

4. The battery package according to claim 2 , wherein the pressing member is a leaf spring.

5. Further provided is an upper frame body located on the upper surface side of the frame body and surrounding the opening side of the frame body, the leaf spring has a pressure contact portion located in a center portion thereof and pressure-contacting the battery, and a curved portion located between the center portion and an end portion thereof and curved in a convex shape facing upward; 5. The battery package according to claim 4, wherein the curved portion is pressed from above by the lid, and an end side of the leaf spring is located inside the upper frame on the top surface of the frame.

6. The frame has a recessed step on its opening side, The battery package according to claim 5 , wherein an end side of the leaf spring contacts a bottom surface of the recessed step portion.

7. 7. The battery package according to claim 6, wherein the end of the leaf spring is bent into an arc and positioned from the bottom surface of the recessed step to the inner surface thereof.

8. The lid is made of metal, The battery package according to claim 3 , wherein the metal spring contacts the lid body via an insulating member.

9. Further provided is an upper frame body located on the upper surface side of the frame body and surrounding the opening side of the frame body, 5. The battery package according to claim 4, wherein the leaf spring exerts elastic force by having both ends thereof engaged from below with a part of the frame or a part of the upper frame.

10. Further provided is an upper frame body located on the upper surface side of the frame body and surrounding the opening side of the frame body, 5. The battery package according to claim 4, wherein the leaf spring has a pressure contact portion located at a center thereof and pressure-contacting the battery, and an end side of the leaf spring is bent into a horizontal U-shape, located on the upper surface of the frame, and pressed from above by the lid.

11. Further provided is an upper frame body located on the upper surface side of the frame body and surrounding the opening side of the frame body, The lid is made of metal, 5. The battery package according to claim 4, wherein the leaf spring has a pressure-contact portion located at a center thereof and pressure-contacting an insulating portion of the battery, and an end side of the leaf spring is located on the upper surface of the frame and is pressed from above by the lid via an insulating member.

12. 2. The battery package according to claim 1, wherein the lid has a protrusion that protrudes downward, the protrusion corresponding to the pressing member.

13. The battery package according to claim 12 , wherein the protrusion presses the battery from above toward the mounting portion when the battery is turned upside down.

14. a first support member that is located on one end side of the mounting portion, is electrically connected to the first electrode, is elastically deformable, and supports one of the two electrode portions from below; 3. The battery package of claim 2, further comprising: a second support member located on the other end side of the mounting portion, electrically connected to the second electrode, elastically deformable, and supporting the other of the two electrode portions from below.

15. 15. The battery package of claim 14, wherein the insulating substrate is located in the mounting portion and has a partition portion that separates the accommodation space into a first accommodation area for accommodating the first support member and a second accommodation area for accommodating the second support member.

16. 2. The battery package according to claim 1, wherein the first electrode has a first bump and the second electrode has a second bump.

17. 2. The battery package according to claim 1, wherein the insulating substrate has a recess that opens to the first surface and is located between the first electrode and the second electrode.

18. 18. The battery package according to claim 17, further comprising a support member that is located within the recess, is elastically deformable, and supports the battery from below.

19. 2. The battery package according to claim 1, wherein the lid is cup-shaped, positioned to cover the mounting portion on the first surface side, and has an accommodation space therein for accommodating the battery.

20. 20. The battery package according to claim 19, wherein the lid has a projection that projects downward at a center thereof, and the lid corresponds to the pressing member.

21. The battery package according to claim 1 , wherein the lid has a recess for accommodating a part of the pressing member.

22. The battery package according to any one of claims 1 to 21; a battery mounted on the mounting portion, one of the two electrode portions electrically connected to the first electrode, and the other of the two electrode portions electrically connected to the second electrode.

23. 23. A method for sealing a battery module according to claim 22, comprising: a battery module sealing method, the battery module being sealed while the pressing member disposed on the upper surface side of the battery is pressed by the lid;