Battery package, battery module, and method for sealing battery module

Abstract

The present invention improves the connection reliability of a battery and the long-term reliability of a battery module. The battery package includes an insulating substrate having a mounting portion on which a battery including two electrode portions arranged along a first surface is mounted, a cover body covering the battery is positioned on a first surface side of the insulating substrate, the cover body is electrically insulated from the first electrode and the second electrode, and the battery package includes a pressing member that presses the battery toward the mounting portion by an elastic force.

Description

Technical Field

[0001] The present invention relates to a battery package, a battery module, and a method for packaging a battery module. Background Art

[0002] As a power source or auxiliary power source for small electronic devices, there is a battery module that can be surface-mounted on a circuit board as shown in Patent Document 1. This prior art battery module (referred to as a surface-mounted battery in Patent Document 1) has an insulating substrate (a part of a member referred to as an outer package in Patent Document 1), and a mounting portion for mounting a battery (referred to as a power generation element in Patent Document 1) is located on the upper surface of the insulating substrate. The battery includes two electrode portions arranged along the upper surface of the insulating substrate.

[0003] A first external electrode (referred to as a positive terminal electrode in Patent Document 1) is located on the lower surface of the insulating substrate. A second external electrode (referred to as a negative terminal electrode in Patent Document 1) is located at a position on the lower surface of the insulating substrate that is separated from the first external electrode. The second external electrode is electrically connected to the second electrode. The first electrode (referred to as a positive electrode pad in Patent Document 1) is located on one end side in the left-right direction of the mounting portion of the insulating substrate, and the first electrode is electrically connected to the first external electrode. The second electrode (referred to as a negative electrode pad in Patent Document 1) is located on the other end side in the left-right direction 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 face 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 face electrode in Patent Document 1) is electrically connected to the second electrode. One electrode portion of the battery is joined 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 joined to the second electrode by a conductive resin. In other words, the battery is fixed to the insulating substrate by a conductive resin.

[0005] Prior Art Documents

[0006] Patent Documents

[0007] Patent Document 1: Japanese Patent Laid-Open No. 2004-152586 Summary of the Invention

[0008] The encapsulation for a battery of the present invention includes: 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 at one end side of the mounting portion and electrically connected to the first external electrode; a second electrode located at the other end side of the mounting portion and electrically connected to the second external electrode; a cover located on the first surface side, electrically insulated from the first electrode and the second electrode, and covering the battery; and a pressing member for pressing the battery toward the mounting portion side by an elastic force.

[0009] In addition, the battery module of the present invention includes: the encapsulation for a battery; and a battery mounted on the mounting portion, one of the two electrode portions being electrically connected to the first electrode, and the other of the two electrode portions being electrically connected to the second electrode.

[0010] A method for sealing the battery module of the present invention, which is a method for sealing the battery module, includes sealing the battery module while pressing the pressing member disposed on the upper surface side of the battery by the cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic top view showing the encapsulation for a battery and the battery module of the first embodiment.

[0012] Figure 2 is along Figure 1 section II-II in.

[0013] Figure 3 is a schematic top view showing the encapsulation for a battery and the battery module of the first embodiment with the metal frame omitted.

[0014] Figure 4 is along Figure 3 section IV-IV in.

[0015] Figure 5 is a schematic cross-sectional view showing the encapsulation for a battery and the battery module of another form of the first embodiment.

[0016] Figure 6 is a schematic cross-sectional view showing the encapsulation for a battery and the battery module of another form of the first embodiment.

[0017] Figure 7 is a schematic cross-sectional view showing the encapsulation for a battery and the battery module of another form of the first embodiment.

[0018] Figure 8It is a schematic cross-sectional view showing a battery package and a battery module in other forms of the first embodiment.

[0019] Figure 9 It is a schematic cross-sectional view showing a battery package and a battery module in other forms of the first embodiment.

[0020] Figure 10 It is a schematic cross-sectional view showing a battery package and a battery module in other forms of the first embodiment.

[0021] Figure 11 It is a schematic top view showing a battery package and a battery module of the second embodiment.

[0022] Figure 12 It is along Figure 11 a cross-sectional view taken along line XII-XII in

[0023] Figure 13 It is a schematic top view showing a battery package and a battery module of the second embodiment in which the arrangement state of the leaf spring is changed.

[0024] Figure 14 It is along Figure 13 a schematic cross-sectional view taken along line XIV-XIV in

[0025] Figure 15 It is a schematic cross-sectional view showing a battery package and a battery module in other forms according to the second embodiment.

[0026] Figure 16 It is a schematic cross-sectional view showing a battery package and a battery module in other forms according to the second embodiment.

[0027] Figure 17 It is a schematic cross-sectional view showing a battery package and a battery module in other forms according to the second embodiment.

[0028] Figure 18 It is a schematic cross-sectional view showing a battery package and a battery module in other forms according to the second embodiment.

[0029] Figure 19 It is a schematic cross-sectional view showing a battery package and a battery module in other forms according to the second embodiment.

[0030] Figure 20 It is a schematic cross-sectional view showing a battery package and a battery module in other forms according to the second embodiment.

[0031] Figure 21It is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the second embodiment.

[0032] Figure 22 It is a schematic cross-sectional view for explaining a sealing method of a battery module according to another aspect of the second embodiment.

[0033] Figure 23 It is a schematic top view showing a battery package and a battery module according to the third embodiment.

[0034] Figure 24 It is along Figure 23 a schematic cross-sectional view taken along line XXIV-XXIV in

[0035] Figure 25 It is a schematic top view showing a battery package and a battery module according to the fourth embodiment.

[0036] Figure 26 It is a schematic cross-sectional view showing a battery package and a battery module according to the fourth embodiment.

[0037] Figure 27 It is a schematic top view showing a battery package and a battery module according to the fifth embodiment.

[0038] Figure 28 It is along Figure 27 a schematic cross-sectional view taken along line XXVIII-XXVIII in

[0039] Figure 29 It is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the fifth embodiment.

[0040] Figure 30 It is a schematic cross-sectional view showing a battery package and a battery module according to another aspect of the fifth embodiment.

[0041] Figure 31 It is a schematic cross-sectional view showing a battery package and a battery module according to the sixth embodiment. DETAILED DESCRIPTION

[0042] If the usage period of the battery module becomes longer, the conductive resin deteriorates due to moisture or oxygen present in the internal space of the battery module or due to heat conduction from the battery usage environment, etc., and thus the bonding strength of the battery to the insulating substrate decreases. As a result, the battery is likely to peel off from the insulating substrate, and there is a concern that the connection reliability of the battery and the long-term reliability of the battery module decrease.

[0043] According to the present invention, the battery is not easily peeled off from the insulating substrate, and the connection reliability of the battery and the long-term reliability of the battery module can be improved.

[0044] Hereinafter, the battery package and the battery module according to the embodiment will be described in detail with reference to the accompanying drawings. However, for ease of explanation, each of the drawings referred to below only schematically shows the constituent elements required for describing the embodiment. Therefore, the battery package and the battery module according to the embodiment can have any constituent elements not shown in the respective drawings referred to. In addition, the dimensions of the constituent elements in each drawing may not faithfully represent the actual dimensions of the constituent elements and the dimensional ratios of the respective members. In the present invention, crimping means contacting with pressure. The rectangular shape is not limited to a strictly rectangular shape. For example, it includes a shape that can be regarded as a rectangular shape as a whole even if the corners are curved. The annular shape includes not only a circular shape but also a rectangular annular shape. The upward direction refers to one direction in the thickness direction of the insulating substrate and is the direction from the second surface side of the insulating substrate toward the first surface side. The downward direction refers to the other direction in the thickness direction of the insulating substrate and is the direction from the first surface side of the insulating substrate toward the second surface side.

[0045] Refer to Figures 1 to 4 The battery package 1 and the battery module 100 according to the first embodiment will be described. Figure 1 It is a schematic top view showing the battery package 1 and the battery module 100 according to the first embodiment. Figure 1 It shows a state in which the cover body 9 is removed, and the cover body 9 is indicated by a two-dot chain line in Figure 1 it. Figure 2 It is a schematic cross-sectional view showing the battery package 1 and the battery module 100 according to the first embodiment. Figure 3 It is a schematic top view showing the battery package 1 and the battery module 100 according to the first embodiment with the metal frame omitted. Figure 4 It 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.

[0046] As Figures 1 to 4 shown in the example, the battery module 100 according to the first embodiment has the battery package 1 according to the first embodiment and the battery 200 mounted on the battery package 1. The battery package 1 can have an insulating substrate 2, and the top view shape of the insulating substrate 2 can be, for example, a rectangular shape. The insulating substrate 2 is made of, for example, a ceramic such as an alumina sintered body (alumina ceramic), a nitride sintered body, a mullite sintered body, or a glass-ceramic sintered body. The insulating substrate 2 can have a plurality of laminated insulating layers or one insulating layer. The top view shape of the insulating substrate 2 is not limited to a rectangular shape and can be appropriately changed.

[0047] As Figures 1 to 4As in the example shown, the insulating substrate 2 may also have a first surface 2a, a second surface 2b located on the side opposite to 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 a flat surface or may have irregularities. The second surface 2b of the insulating substrate 2 may be a flat surface or may have irregularities. The insulating substrate 2 may have a mounting portion 21 for mounting a battery 200 including two electrode portions 201 and 202 arranged 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 a all-solid-state battery. Alternatively, the battery 200 may also be an electronic component such as a capacitor that can supply power. The top view shape of the mounting portion 21 of the insulating substrate 2 may be, for example, a rectangular shape. The mounting portion 21 may also be a portion that overlaps the battery 200 when the battery module 100 is viewed from above. The size of the mounting portion 21 of the insulating substrate 2 in top view may be one size larger than the size of the battery 200 in top view.

[0048] As Figures 1 to 4 in the example shown, the battery package 1 may have an insulating frame 3 as an example of a frame body that is located on the first surface 2a of the insulating substrate 2 so as to surround the mounting portion 21. The insulating frame 3 may be made of ceramic and integrated with the insulating substrate 2. The insulating frame 3 may have a plurality of stacked insulating layers or one insulating layer.

[0049] As Figure 2 and Figure 4 in the example shown, the battery package 1 may have a first external electrode 4 located on the second surface 2b of the insulating substrate 2. The first external electrode 4 may be located on one end side of the second surface 2b of the insulating substrate 2. The first external electrode 4 may be printed on the second surface 2b of the insulating substrate 2 and baked and adhered to the second surface 2b of the insulating substrate 2. The first external electrode 4 may extend from the second surface 2b of the insulating substrate 2 to the side surface 2c (including the corners between the plurality of side surfaces 2c). The first external electrode 4 may be electrically connected to the first electrode of the mounting substrate via solder. The first external electrode 4 is composed of metallized metal powder containing tungsten (W), molybdenum (Mo), manganese (Mn), silver (Ag), copper (Cu), or the like in its composition.

[0050] As Figure 2 and Figure 4As in the example shown, the battery package 1 may have 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 and adhered to the second surface 2b of the insulating substrate 2 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 connected to the second electrode of the mounting substrate via solder. The second external electrode 5 is composed of the same metallized metal powder as the first external electrode 4.

[0051] As Figure 2 and Figure 4 shown in the example, the battery package 1 may have 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 and adhered to the mounting portion 21 of the insulating substrate 2 by firing. The first electrode 6 can be electrically connected to one of the two electrode portions 201 and 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 portion between the insulating substrate 2 and the insulating frame 3.

[0052] The first electrode 6 is electrically connected to the first external electrode 4 through the first connection wiring J1. The first connection wiring J1 may have a through-conductor penetrating one or a plurality of insulating layers and one or a plurality of wiring layers located between the insulating layers. The first electrode 6 and the first connection wiring J1 are composed of the same metallized metal powder as the first external electrode 4 and the like.

[0053] When the first electrode 6 extends to the boundary portion between the insulating substrate 2 and the insulating frame 3, since the first electrode 6 is disposed being sandwiched by two insulating layers (the insulating substrate 2 and the insulating frame 3), the bonding strength between the first electrode 6 and the insulating substrate 2 is excellent. 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, forming a low resistance, so that the extraction efficiency of electrons from the battery 200 can be improved. In addition, the through-conductor of the first connection wiring J1 may be disposed at a position overlapping the insulating frame 3 in a top view (refer to Figure 5 ). In this case, even if the insulating substrate 2 is thin, the strength of the battery package 1 can be improved.

[0054] As Figure 2 and Figure 4As in the example shown, the battery package 1 may have a second electrode 7 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 and adhered to the mounting portion 21 of the insulating substrate 2 by baking. The second electrode 7 can be electrically connected to the other electrode portion 202 of the two electrode portions 201 and 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 portion between the insulating substrate 2 and the insulating frame 3.

[0055] The second electrode 7 is electrically connected to the second external electrode 5 through the second connection wiring J2. The second connection wiring J2 may have a through-conductor penetrating one or a plurality of insulating layers and one or a plurality of wiring layers located between the insulating layers. The second electrode 7 and the second connection wiring J2 are composed of the same metallized metal powder as the first external electrode 4 and the like.

[0056] When the second electrode 7 extends to the boundary portion between the insulating substrate 2 and the insulating frame 3, since the second electrode 7 is disposed being sandwiched by two insulating layers (the insulating substrate 2 and the insulating frame 3), the bonding strength between the second electrode 7 and the insulating substrate 2 is excellent. In addition, the second electrode 7 may not extend to the boundary portion between the insulating substrate 2 and the insulating frame 3.

[0057] The through-conductor of the second connection wiring J2 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 second external electrode 5 is short, and a low resistance is formed, so that the extraction efficiency of power from the battery 200 can be improved. In addition, the through-conductor of the second connection wiring J2 may be disposed at a position overlapping the insulating frame 3 in a top view (see Figure 5 ). In this case, even if the insulating substrate 2 is thin, the strength of the battery package 1 can be improved.

[0058] As Figures 1 to 4 shown in the example, the battery package 1 may have a metal frame 8 as an example of an upper frame on the upper surface side of the insulating frame 3. When the metal frame 8 and the insulating frame 3 are joined by solder, 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 composed of the same metallized metal powder as the first external electrode 4 and the like. As the constituent material of the metal frame 8, a material having a small thermal expansion difference from ceramics can be used. For example, an iron-nickel (Fe-Ni) alloy or an iron-nickel-cobalt (Fe-Ni-Co) alloy can be used. As the upper frame on the upper surface side of the insulating frame 3, the battery package 1 may also have a second insulating frame made of ceramics instead of the metal frame 8.

[0059] As Figure 3 and Figure 4As in the example shown, the metal frame 8 can be omitted from the components of the battery package 1. In this case, it is possible to reduce the thickness of the battery package 1 and the battery module 100, and to reduce the component cost and assembly cost of the battery package 1.

[0060] As Figures 1 to 4 in the example shown, when the insulating substrate 2 and the insulating frame 3 are made of, for example, an alumina sintered body, the insulating substrate 2 and the insulating frame 3 are manufactured as follows. An appropriate organic binder, solvent, etc. are added to and mixed with raw material powders such as alumina and silica to produce a slurry. The slurry is formed into a sheet by a doctor blade method or a calender roll method to produce a green sheet for an insulating layer. Further, appropriate punching processes such as holes for forming the accommodation space 3s of the insulating frame 3 are performed on the green sheet for the insulating layer. Then, a plurality of green sheets for the insulating layer are laminated to produce a laminate. Then, the laminate is fired at a high temperature (about 1300 to 1600 °C) to produce the insulating substrate 2 and the insulating frame 3.

[0061] In the case where 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 metallization layers of tungsten, for example, they can be formed as follows. A metal paste prepared by mixing tungsten powder with an organic solvent and an organic binder is printed at a specified position on the green sheet for the insulating layer by a method such as a screen printing method, and the laminate is fired to form 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. By providing through-conductor holes at specified positions in the green sheet for the insulating layer and filling the through-conductor holes with the metal paste, the through-conductors of the first connection wiring J1 and the second connection wiring J2 are formed.

[0062] A nickel plating layer / gold plating layer can be adhered as a metal plating layer to 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 by a plating method such as an electrolytic plating method or a electroless plating method. Thereby, corrosion of the first external electrode 4, the second external electrode 5, etc. can be effectively reduced. The metal plating layer is not limited to the nickel plating layer / gold plating layer, and can also be other metal plating layers including a nickel plating layer / palladium plating layer / gold plating layer, etc.

[0063] As Figure 2 and Figure 4As in the example shown, the battery package 1 may have a flat cover 9 that closes the opening (opening side) of the metal housing 8. The cover 9 may close the opening (opening side) of the insulating housing 3 or may cover the battery 200. The cover 9 may be joined to the metal housing 8 or the insulating housing 3. The cover 9 may be located on the first surface 2a side of the insulating substrate 2 via the insulating housing 3 or the like. The cover 9 may be electrically insulated from the first electrode 6 and the second electrode 7.

[0064] As Figure 2 and Figure 4 in the example shown, the battery package 1 may have a cover located on the first surface 2a side of the insulating substrate 2 that covers the battery 200. The cover 9 may be electrically insulated from the first electrode 6 and the second electrode 7. As Figure 4 in the example shown, the cover 9 may close the opening (opening side) of the insulating housing 3 on the first surface 2a of the insulating substrate 2. As Figure 2 in the example shown, the cover 9 may close the opening (opening side) of the metal housing 8 on the insulating housing 3. The cover 9 that closes the opening (opening side) of the insulating housing 3 or the metal housing 8 may be flat. The cover 9 may be joined to the frame-shaped metal film F on the metal housing 8 or the insulating housing 3.

[0065] The top view shape of the cover 9 may be, for example, a rectangular shape. The cover 9 is made of, for example, ceramic or metal. As the material constituting the cover 9, a material with a small thermal expansion difference from the ceramic can be used. For example, an iron-nickel (Fe-Ni) alloy or an iron-nickel-cobalt (Fe-Ni-Co) alloy can be used. If the cover 9 can close the opening of the insulating housing 3 (metal housing 8), the top view shape of the cover 9 may be a shape other than a rectangular shape.

[0066] The joining of the cover 9 to the metal housing 8 may be, for example, a joining using a joining material such as solder. In order to improve the airtightness of the battery module 100, the joining of the cover 9 to the metal housing 8 may be performed using glass or solder as the joining material. When joining the ceramic cover 9 and the metal housing 8 with solder, a metal film having the same structure as the frame-shaped metal film F may also be located on the lower surface of the cover 9.

[0067] In order to improve the airtight seal of the battery module 100, the lid 9 made of metal and the metal frame 8 can be joined by welding such as seam welding, laser welding, etc. In the case where the metal frame 8 is omitted from the structure of the battery package 1, the lid 9 made of metal can 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. Since the joining using seam welding, direct seam welding, laser welding or electron beam welding is a joining by locally heating the joining part, the thermal influence on the battery 200 is smaller than in the case of joining by overall heating (reflow heating), i.e., brazing.

[0068] In the case where the lid 9 is made of ceramic, the lid 9 and the insulating frame 3 can be joined by solder joining, brazing, glass frit or resin. In the case of solder joining or brazing, the frame-shaped metal film F is disposed on the insulating frame 3.

[0069] The battery module 100 can be hermetically sealed under a low dew point such as a nitrogen atmosphere, an argon atmosphere or a vacuum atmosphere. Thereby, by hermetically sealing the battery module 100, the possibility of moisture, oxygen, etc. that deteriorate the battery materials of the battery 200 invading the accommodation space 3s from the outside of the battery package 1 can be reduced. By hermetically sealing the battery module 100 in a nitrogen atmosphere, an argon atmosphere or a vacuum atmosphere, the moisture or oxygen that deteriorates the battery materials of the battery 200 can be removed from the accommodation space 3s of the battery package 1 to the maximum extent.

[0070] In particular, when the operating temperature of the battery 200 is -20°C to 100°C, the battery module 100 can be hermetically sealed in a vacuum environment of 10 Pa or less. When the operating temperature of the battery 200 is -50°C to 120°C, the battery module 100 can be hermetically sealed in a vacuum environment of 1 Pa or less, or can also be hermetically sealed in a high vacuum environment of 10 -1 ~10 -5 By sealing under a higher vacuum, the moisture present in the package can be minimized. At the same time, even when the temperature of the battery 200 changes after sealing, the occurrence of condensation inside the package can be reduced. As a result, not only can the adhesion of moisture to the elastic member be reduced to suppress deterioration, but also the deterioration of the battery performance due to the reaction between moisture (especially hydrogen ions) and the battery materials (Li ions, etc.) can be reduced.

[0071] If the battery module 100 cannot be hermetically sealed in a vacuum environment, it can be hermetically sealed in a nitrogen environment with a dew point below -40°C or in an argon environment. The dew point of the nitrogen environment or the argon environment can be below -40°C. Since a nitrogen environment or an argon environment with a dew point of -40°C is equivalent to a vacuum environment of about 10 Pa, in this case, it is also possible to reduce the possibility of moisture adhering to the battery 200 or the elastic member due to condensation or the like, and to improve the durability of the battery module 100.

[0072] In addition, before sealing the battery module 100, the moisture inside the battery package 1 can be evaporated by pre-drying (heating). The temperature of the pre-drying can be equal to or higher than the temperature of the overall heating (reflow heating). Thus, by performing hermetic sealing after pre-drying, it is possible to release in advance the gas or the like trapped by the wall of the accommodation space 3s of the battery package 1, and to reduce the moisture, oxygen, etc. present in the accommodation space 3s of the battery package 1 after tight sealing.

[0073] Moreover, the internal space of the battery package 1 can be pre-dried in a state of reduced pressure compared to the atmospheric pressure. Thus, the boiling point of water is lowered, and moisture can be evaporated at a lower temperature compared to under the atmospheric pressure. As a result, the thermal impact on the battery 200 becomes smaller, and the possibility of deterioration of the battery material of the battery 200 can be reduced.

[0074] As Figures 1 to 4 shown in the example, the battery package 1 can have a spiral 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 using the downward elastic force (spring force). The spiral 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 the portion between the two electrode portions 201 and 202 of the battery 200. The spiral spring is shown as an example of an elastic body material, and as long as it is an elastic body material, the material and shape are not limited, and it can also be a leaf spring or a sponge, etc.

[0075] The helical spring 10, which is an example of an elastic member, can be located between the lid 9 and the insulating portion 203 of the battery 200. The helical spring 10, which is an example of an elastic member, can be pressed from above by the lid 9. The upper end portion of the helical spring 10, which is an example of an elastic member, can be in press contact with the back surface of the lid 9. The upper end portion of the helical spring 10, which is an example of an elastic member, can also be joined to the back surface of the lid 9. A part of the lid 9 can be an elastic member that presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2. In order to absorb the manufacturing error in the thickness of the battery 200 and the insulating frame 3, the movable range (expansion and contraction range) of the helical spring 10, which is an example of an elastic member, can be 20% or more of the height (dimension in the vertical direction) of the helical spring 10 before elastic deformation. When viewed from above, the helical spring 10 can press the central portion of the battery 200. Thereby, the battery 200 can be fixed more stably.

[0076] As Figures 1 to 4 shown in the example, the battery module 100 of the first embodiment has: the battery package 1 of the first embodiment; the battery 200 mounted on the mounting portion 21 of the insulating substrate 2 of the battery package 1. The battery 200 can be accommodated in the accommodation space 3s of the insulating frame 3. One electrode portion 201 of the battery 200 can be electrically connected to the first electrode 6. The other electrode portion 202 of the battery 200 can be electrically connected to the second electrode 7. Since the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1 and the battery module 100 can be surface-mounted on the mounting substrate.

[0077] According to the example of the first embodiment, by closing the opening side of the insulating frame 3 with the lid 9, the helical spring 10 presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 by the downward elastic force, so that the battery 200 can be mechanically fixed to the insulating substrate 2. Therefore, even if the usage period of the battery module 100 becomes longer, the possibility of a decrease in the bonding strength between the battery 200 and the insulating substrate 2 can be reduced. Thereby, according to the example of the first embodiment, the battery 200 is not easily peeled off from the insulating substrate 2, so that the connection reliability of the battery 200 and the long-term reliability of the battery module 100 (function and effect (1)) can be improved.

[0078] In addition, the lid 9 is electrically insulated from the first electrode 6 and the second electrode 7. Therefore, according to the example of the first embodiment, the possibility of a short circuit occurring between the lid 9 and other components can be reduced, and no electric discharge occurs from the lid 9 to the outside, so that electric power can be efficiently taken out from the battery 200 (function and effect (2)).

[0079] When the battery package 1 includes the insulating housing 3 having the accommodation space 3s, the battery package 1 becomes robust against external impacts, thereby further improving the connection reliability of the battery 200 and the long-term reliability of the battery module 100. In particular, when there is an internal space (gap) between the back surface of the lid 9 and the battery 200, even if the battery 200 expands, the stress of the coil spring 10 can be alleviated (effect (3)). Figure 2 The depth of the shown accommodation space 3s is shallower than the thickness (height) of the battery 200. Figure 4 The depth of the shown accommodation space 3s is deeper than the thickness of the battery 200. As Figure 4 In the example shown, if the depth of the accommodation space 3s is deeper than the thickness of the battery 200, the possibility of short circuit between the electrode portions 201, 202 of the battery 200 and the lid 9 via the frame-shaped metal film F and the metal housing 8 can be reduced in the case of displacement of the battery 200.

[0080] Refer to Figures 5 to 10 and the battery package 1 and the battery module of other forms of the first embodiment will be described. Figures 5 to 10 It is a schematic cross-sectional view showing the battery package 1 and the battery module 100 of other forms of the first embodiment.

[0081] As Figures 5 to 7 In the example shown, the battery package 1 may have the first support member 11 that supports one of the two electrode portions 201, 202 of the battery 200 from below. The first support member 11 may be located at 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 configured to be elastically deformable in the vertical direction.

[0082] The battery package 1 may also have the 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 at 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 configured to be elastically deformable in the vertical direction.

[0083] As Figure 5 In the example shown, both the first support member 11 and the second support member 12 may be leaf springs. As Figure 6 In the example shown, both the first support member 11 and the second support member 12 may also be coil springs. As Figure 7As in the example shown, if both the first support member 11 and the second support member 12 are made of a conductive material, they can be an elastic conductive sheet, rubber, sponge (such as graphene meso sponge, etc.).

[0084] When the battery package 1 has the first support member 11 and the second support member 12, even if the insulating substrate 2 has a convex warp in the upward direction, the first support member 11 and the second support member 12 can elastically deform according to the warp of the insulating substrate 2, thereby absorbing the warp of the insulating substrate 2. Therefore, according to an example of another form 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 thus the connection reliability of the battery 200 can be further improved.

[0085] In addition, as Figure 5 shown in the example, when there is a metal frame 8, the accommodation space 3s can be made deeper in the same way as Figure 4 For example, the depth of the accommodation space 3s can be such a depth that, by using the seal of the cover body 9, the battery 200 is lower than the opening of the insulating frame 3 in a state where the spiral spring 10, the first support member 11 and the second support member 12 are in a compressed state. Thereby, the possibility of short circuit between the electrode portions 201 and 202 of the battery 200 and the cover body 9 via the frame-shaped metal film F and the metal frame 8 can be reduced.

[0086] Alternatively, as Figure 6 shown in the example, the frame-shaped metal film F can be arranged at a position separated outward from the opening of the accommodation space 3s. Thereby, even when the electrode portions 201 and 202 of the battery 200 protrude from the opening, the possibility of short circuit between the electrode portions 201 and 202 and the cover body 9 can be reduced.

[0087] As Figure 6 and Figure 7 shown in the example, the insulating substrate 2 can have a partition portion 22 in the accommodation space 3s of the insulating frame 3 that separates the first accommodation area for accommodating the first support member 11 and the second accommodation area for accommodating the second support member 12. The partition portion 22 of the insulating substrate 2 can be located at the central portion of the mounting portion 21.

[0088] When the insulating substrate 2 has the partition portion 22, it is possible to reduce the positional deviation of the first support member 11 with respect to the first surface 2a of the insulating substrate 2 and the positional deviation with respect to the first surface 2a of the insulating substrate 2. Therefore, according to an example of another form of the first embodiment, the two electrode portions 201 and 202 of the battery 200 can be stably supported by the first support member 11 and the second support member 12.

[0089] As Figure 8 shown in the example, the first electrode 6 may have the first bump 61 that contacts one of the pair of electrode portions 201 and 202 of the battery 200, i.e., the electrode portion 201. The second electrode 7 may have the second bump 71 that contacts the other electrode portion 202 of the pair of electrode portions 201 and 202 of the battery 200. The first bump 61 and the second bump 71 are made of the same metallized metal powder as the first external electrode 4 and the like, so that they can be easily formed by metallization printing. The thickness (height) of the first bump 61 and the second bump 71 is about 10 μm to 100 μm.

[0090] 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 warps convexly in the upward direction, 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 an example of another form of the first embodiment, the connection reliability of the battery 200 can be further improved.

[0091] As Figure 9 and Figure 10 shown in the example, the insulating substrate 2 may have the recess 23 that opens on 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. In addition, as Figure 10 shown in the example, the battery package 1 may have the support member 13 that supports the insulating portion 203 of the battery 200 from below. The support member 13 may be located in the recess 23 of the insulating substrate 2. The support member 13 may be joined to the bottom surface of the recess 23 of the insulating substrate 2. The support member 13 may be configured to be elastically deformable in the vertical direction. As Figure 10 shown in the example, 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 helical spring or rubber.

[0092] 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 warps convexly in the upward direction, the battery 200 can be easily mounted on the mounting portion 21 of the insulating substrate 2. Thus, according to an example of another form of the first embodiment, the assemblability of the battery module 100 can be improved.

[0093] When the battery package 1 has the support member 13, when the battery 200 is mounted on the mounting portion 21 of the insulating substrate 2, the impact applied to the battery 200 due to the elastic deformation of the support member 13 can be reduced. Thus, according to an example of another aspect of the first embodiment, the assemblability of the battery module 100 can be further improved.

[0094] [Second Embodiment]

[0095] Refer to Figures 11 to 14 , and the battery package 1A and the battery module 100A of the second embodiment will be described. Figure 11 FIG. is a schematic top view showing the battery package 1A and the battery module 100A of the second embodiment. Figure 12 is along Figure 11 in the XII-XII line of the schematic cross-sectional view. Figure 13 FIG. is a schematic top view showing the battery package 1A and the battery module 100A of the second embodiment after changing the arrangement state of the leaf spring 14. Figure 14 is along Figure 13 in the XIV-XIV line of the schematic cross-sectional view. Figure 11 and Figure 13 show the state where the cover 9 is removed, and the cover 9 is shown by a two-dot chain line in Figure 11 and Figure 13 .

[0096] As Figures 11 to 14 shown in the example, the battery module 100A of the second embodiment has the battery package 1A of the second embodiment and the battery 200 mounted on the battery package 1. The battery package 1A of the second embodiment has the same structure as the battery package 1 of the first embodiment except for a part of the structure. The structure of the battery package 1A of the second embodiment that is different from the battery package 1 of the first embodiment will be described. For ease of explanation, components having the same functions as those already described in the first embodiment are labeled with the same reference numerals.

[0097] As Figures 11 to 14 shown in the example, the battery package 1A may have a leaf spring 14 as an example of a pressing member, and the pressing member presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 by the downward elastic force (spring force). 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.

[0098] The leaf spring 14 can be located on the opening side of the accommodation space 3s of the insulating housing 3 inside the metal housing 8. The leaf spring 14 can have a crimping portion 14a located at its central portion and crimped to the insulating portion 203 of the battery 200. The leaf spring 14 can have a bending portion 14b located between its central portion and end portion and convexly bent upward. Additionally, the bending portion 14b of the leaf spring 14 can be pressed from above by the cover body 9. The end side of the leaf spring 14 can be located inside the metal housing 8 on the upper surface of the insulating housing 3.

[0099] The movable range (expansion and contraction range) of the leaf spring 14 as an example of the elastic member can be 20% or more of the height (dimension in the up and down direction) of the leaf spring 14 before elastic deformation, so as to absorb the manufacturing error of the thickness of the battery 200 and the insulating housing 3, and the height of the leaf spring 14 before elastic deformation can be about 0.1 mm to 1.0 mm.

[0100] As Figure 11 and Figure 12 In the example shown, the leaf spring 14 can be arranged inside the metal housing 8 along the arrangement direction of the two electrode portions 201, 202 of the battery 200. As Figure 11 In the example shown, in a plan view, the leaf spring 14 can be arranged to overlap the two electrode portions 201, 202 and the insulating portion 203 of the battery 200. Additionally, as Figure 13 and Figure 14 In the example shown, the leaf spring 14 can be arranged inside the metal housing 8 in a direction orthogonal to the arrangement direction of the two electrode portions 201, 202 of the battery 200. As Figure 13 In the example shown, the leaf spring 14 can be arranged to be located between the two electrode portions 201, 202 of the battery 200 and overlap the insulating portion 203 of the battery 200 in a plan view.

[0101] The leaf spring 14 can be a non-conductive elastic member. The leaf spring 14 can be made of non-conductive ceramic or plastic, in which case, there will be no short circuit between the cover body 9 and the battery 200. In particular, when the leaf spring 14 is made of non-conductive ceramic, the leaf spring 14 has high heat resistance, which can improve the long-term reliability of the battery module 100A.

[0102] As Figures 11 to 14As in the example shown, the battery module 100A of the second embodiment has the battery package 1A of the second embodiment and the battery 200 mounted on the mounting portion 21 of the insulating substrate 2 of the battery package 1A. The battery 200 can be accommodated in the accommodation space 3s of the insulating frame 3. One electrode portion 201 of the battery 200 can be electrically connected to the first electrode 6. The other electrode portion 202 of the battery 200 can be electrically connected to the second electrode 7. Since the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1A and the battery module 100A can be surface-mounted on the mounting substrate.

[0103] According to the example of the second embodiment, by closing the opening side of the insulating frame 3 with the cover 9, the leaf spring 14 presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 by the downward elastic force, so that the battery 200 can be mechanically fixed to the insulating substrate 2. Therefore, even if the usage period of the battery module 100 becomes longer, the possibility of the bonding strength between the battery 200 and the insulating substrate 2 decreasing can be reduced. Thus, according to the example of the second embodiment, the battery 200 is not easily peeled off from the insulating substrate 2, thereby improving the connection reliability of the battery 200 and the long-term reliability of the battery module 100A.

[0104] In the case where the leaf spring 14 has a crimping portion 14a and a bending portion 14b, in a state where the end side of the leaf spring 14 contacts the upper surface of the insulating frame 3 and the bending portion 14b of the leaf spring 14 is pressed by the cover 9, the crimping portion 14a of the leaf spring 14 is crimped to the insulating portion 203 of the battery 200. Therefore, the elastic force of the leaf spring 14 can be effectively exerted, and the fixing state of the battery 200 relative to the insulating substrate 2 can be stabilized. Thus, 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.

[0105] In addition, the example of the second embodiment also has the same effects as the aforementioned effects (2) and (3).

[0106] Refer to Figures 15 to 21 The battery package 1A and the battery module 100A of other forms of the second embodiment will be described. Figures 15 to 21 It is a schematic cross-sectional view showing the battery package 1A and the battery module 100A of other forms according to the second embodiment.

[0107] As Figure 15 and Figure 16As in the example shown, the insulating housing 3 may have a concave stepped portion 31 on its opening side. The end side of the leaf spring 14 may contact the bottom surface 31a of the concave stepped portion 31 of the insulating housing 3. The concave stepped portion 31 of the insulating housing 3 may be annular. The concave stepped portion 31 of the insulating housing 3 may be located on the opposite two side portions among the four side portions on the opening side of the insulating housing 3 where the end side of the leaf spring 14 contacts. As long as the concave stepped portion 31 of the insulating housing 3 has a width for accommodating the end side of the leaf spring 14, it may not be located in the entire area of the side portion on the opening side of the insulating housing 3. In addition, as Figure 16 in the example shown, the end side of the leaf spring 14 may be bent into an arc shape and may be arranged from the bottom surface 31a of the concave stepped portion 31 of the insulating housing 3 to the inner side surface 31i.

[0108] When the end side of the leaf spring 14 contacts the concave stepped portion 31 of the insulating housing 3, the movement of the end side of the leaf spring 14 is restricted by the concave stepped portion 31 of the insulating housing 3, so that the elastic force of the leaf spring 14 can be fully exerted, and the fixed state of the battery 200 relative to the insulating substrate 2 can be made more stable. Thus, according to an example of another form 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.

[0109] When the end side of the leaf spring 14 is bent into an arc shape, the end side of the leaf spring 14 will not be hooked on the edge portion of the opening side of the accommodation space 3s of the insulating housing 3, so that the leaf spring 14 can be located inside the metal housing 8. Thus, according to an example of another form of the second embodiment, the assemblability of the battery module 100A can be improved.

[0110] As Figure 17 in the example shown, the bent portion 14b of the leaf spring 14 may contact the back surface of the cover 9 made of metal via an insulating sheet IS as an example of an insulating member. A part or all of the surface of the leaf spring 14 may be coated with an insulating material. An insulating member may be arranged between the leaf spring 14 and the battery 200. In this case, the leaf spring 14 can be electrically insulated from the cover 9. Therefore, according to another form of the second embodiment, even if a short circuit occurs between the crimping portion 14a of the leaf spring 14 and any one of the two electrode portions 201 and 202 of the battery 200, no electric discharge will occur from the cover 9 to the outside, so that electric power can be efficiently taken out from the battery 200.

[0111] As Figure 18As in the example shown, instead of the leaf spring 14 having a bent portion 14b, the leaf spring 14 can be engaged with a part of the metal housing 8 from below through its both end portions, thereby exerting a downward elastic force (spring force). Instead of the both end portions of the leaf spring 14 being engaged with a part of the metal housing 8 from below, they can be engaged with a part of the insulating housing 3 from below. According to this structure, since the cover 9 can be joined after fixing the battery 200 using the leaf spring 14, the cover 9 can be joined after confirming the fixing of the battery 200 by the leaf spring 14. In addition, an insulating member can be disposed between the leaf spring 14 and the metal housing 8. A part or all of the surface of the leaf spring 14 can be coated with an insulating material. An insulating member can be disposed between the leaf spring 14 and the battery 200.

[0112] In these cases, through the both end portions of the leaf spring 14 being engaged with a part of the metal housing 8 or a part of the insulating housing 3 from below, the crimping portion 14a of the leaf spring 14 is crimped to the insulating portion 203 of the battery 200. Therefore, the elastic force of the leaf spring 14 can be effectively exerted, and the fixing state of the battery 200 relative to the insulating substrate 2 can be stabilized. Thus, 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.

[0113] As Figure 19 in the example shown, instead of the leaf spring 14 having a bent portion 14b, the end side of the leaf spring 14 can be bent into a horizontal U shape. The end side plate spring of the leaf spring 14 can be located on the upper surface of the insulating housing 3. The end side of the leaf spring 14 can be pressed from above by the cover 9.

[0114] In the case where the end side of the leaf spring 14 is bent into a horizontal U shape, in a state where the end side of the leaf spring 14 is pressed by the cover 9, the crimping portion 14a of the leaf spring 14 is crimped to the insulating portion 203 of the battery 200. Therefore, the elastic force of the leaf spring 14 can be effectively exerted, and the fixing state of the battery 200 relative to the insulating substrate 2 can be stabilized. Thus, 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.

[0115] As Figure 20 in the example shown, instead of the leaf spring 14 having a bent portion 14b, the end side of the leaf spring 14 can be pressed from above by the cover 9 via an insulating ring IR as an example of an insulating member.

[0116] In this case, with the end portion side of the leaf spring 14 being pressed by the cover body 9 via the insulating ring IR, the crimping portion 14a of the leaf spring 14 is crimped to the insulating portion 203 of the battery 200. Accordingly, the elastic force of the leaf spring 14 can be effectively exerted, and the fixing state of the battery 200 relative to the insulating substrate 2 can be stabilized. Thus, 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. Moreover, as Figure 20 shown, the lateral displacement of the leaf spring 14 can be restricted by forming a cutout on the lower surface of the insulating ring IR.

[0117] As Figure 21 shown in the example, instead of the leaf spring 14 having a bent portion 14b, the end portion side of the leaf spring 14 can be pressed from above by the cover body 9. The end portion side of the leaf spring 14 can be joined to the back surface of the cover body 9.

[0118] When the end portion side of the leaf spring 14 is joined to the back surface of the cover body 9, the positional displacement of the leaf spring 14 relative to the cover body 9 can be eliminated. Accordingly, the elastic force of the leaf spring 14 can be effectively exerted, the fixing state of the battery 200 relative to the insulating substrate 2 can be stabilized, and the possibility of conduction between the electrode portions 201 and 202 of the battery 200 and the cover body 9 can be reduced. Thus, 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. Alternatively, a projection or the like for restricting the lateral movement of the leaf spring 14 can be provided on the back surface of the cover body 9.

[0119] In addition, regarding the battery package 1A of the second embodiment, the structure shown above can also be applied. Figures 5 to 10 shown.

[0120] Refer to Figure 22 to describe the sealing method of the battery module of the second embodiment. Figure 22 is a schematic cross-sectional view for explaining the sealing method of the battery module in another form of the second embodiment.

[0121] As Figure 22 shown in the example, the sealing method of the battery module of the second embodiment is a method for sealing the battery module 100A, in which while pressing the leaf spring 14, which is an example of a pressing member disposed on the upper surface side of the battery 200, from above by the cover body 9 made of metal, the battery module 100A is sealed. The specific content of the sealing method of the battery module 100A of the second embodiment is as follows.

[0122] First, an example of the case of seam-welding sealing is shown. The leaf spring 14 is disposed on the upper surface side (the opening side of the insulating housing 3) of the battery 200 in such a manner that the crimping 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 housing 3. Next, the battery package 1A is placed in a chamber filled with an inert gas such as nitrogen or argon by a drying device, and pre-dried at a temperature of 100°C or higher to evaporate the moisture inside the battery package 1A. The battery package 1A may also be pre-dried in a state where the internal space of the battery package 1A is decompressed to a pressure lower than the atmospheric pressure.

[0123] Then, directly in a nitrogen environment or an argon environment with a dew point of -40°C or lower, the lid 9 made of metal is brought into contact with the bent portion 14b of the leaf spring 14, and the lid 9 is pressed downward by the pressing portion PP. Thus, in a state where the back surface of the lid 9 contacts the upper surface of the metal housing 8, the leaf spring 14 is pressed from above by the lid 9. Then, in a state where the leaf spring 14 is pressed by the lid 9, a part of the peripheral portion of the lid 9 is spot-welded using the roller electrode RE, thereby joining a part of the peripheral portion of the lid 9 to the upper surface of the metal housing 8. Further, by performing seam-welding on the entire peripheral portion of the lid 9 using the roller electrode RE, the entire peripheral portion of the lid 9 is joined to the upper surface of the metal housing 8. Thereby, the battery module 100A can be sealed while pressing the lid 9 by the leaf spring 14. Instead of sealing the battery module 100A in a nitrogen environment or an argon environment with a dew point of -40°C or lower, the battery module 100A may also be sealed in a vacuum environment of 10 Pa or lower.

[0124] An example of the sealing method in the above-described Figure 22 structure has been given, but even in the case of other structures or other sealing methods, the battery module 100A can be hermetically sealed while pressing the leaf spring 14, which is an example of an elastic member, by the lid 9.

[0125] According to the sealing method of the battery module of the second embodiment, the battery module 100A is sealed while pressing the leaf spring 14 from above by the lid 9. Therefore, the battery module 100A can be easily sealed while maintaining the airtightness of the battery module 100A, and thus the assemblability of the battery module 100A can be improved.

[0126] The sealing method of the battery module of the second embodiment can be applied not only to the battery module 100A, but also to the sealing methods for the aforementioned battery module 100 and the subsequent battery modules 100B (100C, 100D).

[0127] [Third Embodiment]

[0128] Refer toFigure 23 and Figure 24 The battery package 1B and the battery module 100B of the third embodiment will be described. Figure 23 It is a schematic plan view showing the battery package 1B and the battery module 100B of the third embodiment. Figure 23 It shows the state where the lid 9 is removed, and the lid 9 is indicated by a two-dot chain line in Figure 23 it. Figure 24 It is a schematic cross-sectional view along the line XXIV-XIV in Figure 23 it.

[0129] As in the examples shown in Figure 23 and Figure 24 The battery module 100B of the third embodiment has the battery package 1B of the third embodiment and the battery 200 mounted on the battery package 1B. The battery package 1B of the third embodiment has the same structure as the battery package 1 of the first embodiment except for a part of the structure. The structure of the battery package 1B of the third embodiment that is different from the battery package 1 of the first embodiment will be described. For ease of explanation, members having the same functions as those already described in the first embodiment are denoted by the same reference numerals.

[0130] As in the examples shown in Figure 23 and Figure 24 The battery package 1B may have a rubber plate 15 as an example of a pressing member, and this pressing member presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 by the downward elastic force (spring force). The rubber plate 15 may be located on the back side of the lid 9. The rubber plate 15 may be joined to the back of the lid 9. The rubber plate 15 may be clamped between the back of the lid 9 and the insulating portion 203 of the battery 200. The rubber plate 15 may be porous or non-conductive.

[0131] As in the examples shown in Figure 23 and Figure 24 The battery module 100B of the third embodiment has the battery package 1B of the third embodiment and the battery 200 mounted on the mounting portion 21 of the insulating substrate 2 of the battery package 1B. The battery 200 may be accommodated in the accommodation space 3s of the 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. Since the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1B and the battery module 100B can be surface-mounted on the mounting substrate.

[0132] According to the example of the third embodiment, the opening side of the insulating housing 3 is blocked by the cover body 9, and the rubber plate 15 presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 by the downward elastic force, so that the battery 200 can be mechanically fixed to the insulating substrate 2. Therefore, even if the usage period of the battery module 100B becomes longer, the possibility of the bonding strength between the battery 200 and the insulating substrate 2 decreasing can be reduced. Thus, according to the example of the third embodiment, the battery 200 is not easily peeled off from the insulating substrate 2, thereby improving the connection reliability of the battery 200 and the long-term reliability of the battery module 100B.

[0133] In addition, the example of the third embodiment also has the same effects as the above-described effects (2) and (3).

[0134] [Fourth Embodiment]

[0135] Refer to Figure 25 and Figure 26 to describe the battery package 1B and the battery module 100B of the third embodiment. Figure 25 FIG. is a schematic plan view showing the battery package 1C and the battery module 100C of the fourth embodiment. Figure 25 It shows the state where the cover body 9 is removed, and the cover body 9 is shown by a double-dot chain line in Figure 25 FIG. Figure 26 It is a schematic cross-sectional view taken along the line XXV-XXV in Figure 25 FIG.

[0136] As in the examples shown in Figure 25 and Figure 26 the battery module 100C of the fourth embodiment has the battery package 1C of the fourth embodiment and the battery 200 mounted on the battery package 1C. The battery package 1C of the fourth embodiment has the same structure as the battery package 1 of the first embodiment except for a part of the structure. The structure of the battery package 1C of the fourth embodiment that is different from the battery package 1 of the first embodiment will be described. For the sake of convenience of description, components having the same functions as those already described in the first embodiment are denoted by the same reference numerals.

[0137] As in Figure 25 and Figure 26As shown in the example, the cover 9 may have a convex portion 91 protruding in the downward direction. The convex portion 91 of the cover 9 can press the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 by the downward elastic force. In other words, the convex portion 91 of the cover 9 can 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 by the downward elastic force. The convex portion 91 may be located at the central portion of the cover 9. The convex portion 91 may be a bent portion formed by bending a part of the flat cover 9 in the downward direction. The convex portion 91 may be a thick-walled portion that thickens a part of the cover 9. The convex portion 91 may be a protrusion joined to the back surface of the cover 9.

[0138] As Figure 26 shown in the example, the convex portion 91 of the cover 9 can press the battery 200 toward the mounting portion 21 of the insulating substrate 2 from the upper direction by flipping it up and down. Specifically, after the cover 9 is joined, the convex portion 91 protruding in the upward direction can be flipped downward, and the flipped convex portion 91 presses the battery 200 toward the mounting portion 21 of the insulating substrate 2 from the upper direction. In Figure 26 , the convex portion 91 of the cover 9 in the state before flipping is indicated by a dashed double-dotted line. It is also possible to perform sealing in a state where the internal space of the battery package 1C including the accommodation space 3s is decompressed to be lower than the atmospheric pressure so that the convex portion 91 of the cover 9 can be easily flipped up and down. The cover 9 having the convex portion 91 can also be manufactured by blanking a metal plate. The cover 9 having the convex portion 91 can also be manufactured by blanking and stamping a metal plate.

[0139] As Figure 25 and Figure 26 shown in the example, the battery module 100C of the fourth embodiment includes the battery package 1C of the fourth embodiment and the battery 200 mounted on the mounting portion 21 of the insulating substrate 2 of the battery package 1C. The battery 200 can be accommodated in the accommodation space 3s of the insulating frame 3. One electrode portion 201 of the battery 200 can be electrically connected to the first electrode 6. The other electrode portion 202 of the battery 200 can be electrically connected to the second electrode 7. Since the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1C and the battery module 100C can be surface-mounted on the mounting substrate.

[0140] According to the example of the fourth embodiment, the cover 9 closes the opening side of the insulating housing 3, and the convex portion 91 of the cover 9 is turned upside down as needed. Then, the convex portion 91 of the cover 9 presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 by the downward elastic force, so that the battery 200 can be mechanically fixed to the insulating substrate 2. Therefore, even if the usage period of the battery module 100C becomes longer, the possibility of the bonding strength between the battery 200 and the insulating substrate 2 decreasing can be reduced, and thus the battery 200 is not easily peeled off from the insulating substrate 2. In addition, since the convex portion 91 does not contact the battery 200 when the cover 9 is joined, the heat at the time of joining the cover 9 and the current at the time of seam welding are not easily transmitted to the battery 200, and thus the possibility of the battery 200 deteriorating due to heat can be reduced. According to the example of the fourth embodiment, the connection reliability of the battery 200 and the long-term reliability of the battery module 100C can be improved.

[0141] In addition, according to the example of the fourth embodiment, the convex portion 91 of the cover 9 serves as a pressing member that presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 by the downward elastic force. Therefore, according to the example of the fourth embodiment, the number of components of the battery package 1C and the battery module 100C can be reduced, and thus the structures of the battery package 1C and the battery module 100C can be simplified.

[0142] In addition, the example of the fourth embodiment also has the same effects as the above-described effects (2) and (3).

[0143] [Fifth Embodiment]

[0144] Refer to Figure 27 and Figure 28 to describe the battery package 1D and the battery module 100D of the fifth embodiment. Figure 27 is a schematic top view showing the battery package 1D and the battery module 100D of the fifth embodiment. Figure 27 represents a state where the cover 9D is removed, and the cover 9D is indicated by a two-dot chain line in Figure 27 . Figure 28 is a schematic cross-sectional view taken along line XXVIII-XXVIII in Figure 27 .

[0145] As shown in Figure 27 and Figure 28As in the example shown, the battery module 100D of the fifth embodiment has the battery package 1D of the fifth embodiment and the battery 200 mounted on the battery package 1D. The battery package 1D of the fifth embodiment has the same structure as the battery package 1 of the first embodiment except for a part of the structure. The structure of the battery package 1D of the fifth embodiment that is different from the battery package 1 of the first embodiment will be described. For ease of explanation, components having the same functions as those already described in the first embodiment are labeled with the same reference numerals.

[0146] As Figure 27 and Figure 28 shown in the example, the battery package 1D may have a cup-shaped cover 9D to replace the insulating frame 3, the metal frame 8, and the flat cover 9. The cover 9D may be configured to cover the mounting portion 21 on the first surface 2a side of the insulating substrate 2. The cover 9D may have an accommodation space 9Ds for accommodating the battery 200 inside thereof. When the cover 9D made of metal is joined to the insulating substrate 2 with solder, the frame-shaped metal film F may be located on the upper surface of the insulating substrate 2. The frame-shaped metal film F is composed of the same metallized metal powder as the first external electrode 4 and the like. The cover 9D made of metal can be manufactured by stamping a metal plate.

[0147] As Figure 27 and Figure 28 shown in the example, the battery module 100D of the fifth embodiment has the battery package 1D of the fifth embodiment and the battery 200 mounted on the mounting portion 21 of the insulating substrate 2 of the battery package 1D. The battery 200 may be accommodated in the accommodation space 9Ds of the cover 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. Since the first external electrode 4 and the second external electrode 5 are located on the second surface 2b of the insulating substrate 2, the battery package 1D and the battery module 100D can be surface-mounted on the mounting substrate.

[0148] According to the example of the fifth embodiment, by covering the mounting portion 21 of the insulating substrate 2 with the cover 9D, 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 using the downward elastic force, so that the battery 200 can be mechanically fixed to the insulating substrate 2. Therefore, even if the usage period of the battery module 100D becomes longer, the possibility of the bonding strength between the battery 200 and the insulating substrate 2 decreasing can be reduced. Thus, according to the example of the fifth embodiment, the battery 200 is not easily peeled off from the insulating substrate 2, thereby improving the connection reliability of the battery 200 and the long-term reliability of the battery module 100D.

[0149] According to the example of the fifth embodiment, since the lid 9D has an accommodation space 9Ds, the insulating frame 3 can be omitted from the structure of the battery package 1D, simplifying the structure of the battery package 1D and reducing the manufacturing cost of the battery package 1D.

[0150] In addition, the example of the fifth embodiment also has the same effect as the aforementioned effect (2).

[0151] Refer to Figure 29 and Figure 30 , and other forms of the battery package 1D and the battery module 100D of the fifth embodiment will be described. Figure 29 and Figure 30 are schematic cross-sectional views showing other forms of the battery package and the battery module of the fifth embodiment.

[0152] As Figure 29 shown in the example, the lid 9D can have a protrusion 91D protruding downward at its central portion. The peripheral portion of the protrusion 91D of the lid 9D can be elastically deformable. The protrusion 91D of the lid 9D can be displaced in the vertical direction by the elastic deformation of its peripheral portion. The protrusion 91D of the lid 9D can be elastically deformed in the vertical direction. The lid 9D can be equivalent to a pressing member that presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 using the downward elastic force. In this case, the protrusion 91D of the lid 9D can be equivalent to a crimping portion that crimps with the insulating portion 203 of the battery 200.

[0153] When the lid 9D has the protrusion 91D, by covering the mounting portion 21 of the insulating substrate 2 with the lid 9D, the protrusion 91D presses the insulating portion 203 of the battery 200 toward the mounting portion 21 of the insulating substrate 2 using the downward elastic force, thereby mechanically fixing the battery 200 to the insulating substrate 2.

[0154] In addition, since the lid 9D having the protrusion 91D is equivalent to a pressing member, according to the example of other forms of the fifth embodiment, the number of components of the battery package 1D can be reduced, the structure of the battery package 1D can be simplified, and the manufacturing cost of the battery package 1D can be reduced.

[0155] As Figure 30 shown in the example, similar to the insulating substrate 2, the lid 9D can be made of ceramic. The lid 9D made of ceramic can be fired after laminating ceramic green sheets in the same manner as the insulating substrate 2, or can be fired after being formed into a cup shape by stamping ceramic powder. In addition, the lid 9D can have a recess 92D on its back side for accommodating a part of the spiral spring 10, which is an example of a pressing member.

[0156] When the lid body 9D has the recess 92D, the positioning of the coil spring 10 with respect to the lid body 9D becomes easy. Therefore, even if the lid body 9D is cup-shaped or flat-plate-shaped, according to an example of another form of the fifth embodiment, the assemblability of the battery module 100D can be improved.

[0157] As Figures 27 to 30 shown in the example, the first surface 2a of the insulating substrate 2 is a flat surface, but the insulating substrate 2 may also have a recess that opens on the first surface 2a and is used to accommodate the battery 200.

[0158] [Sixth Embodiment]

[0159] Refer to Figure 31 , and the battery package 1E and the battery module 100E of the sixth embodiment will be described. Figure 31 It is a cross-sectional view of the battery package 1E of the sixth embodiment.

[0160] As Figure 31 shown in the example, the battery module 100E of the sixth embodiment has the battery package 1E of the sixth embodiment and the battery 200 mounted on the battery package 1E.

[0161] As Figure 31 shown in the example, the battery package 1E may have an insulating frame 3 and a cup-shaped lid body 9E. The battery 200 can be accommodated in the space including the accommodation space 3s of the insulating frame 3 and the accommodation space 9Es of the lid body 9E.

[0162] The lid body 9E can be made of ceramic in the same manner as the insulating substrate 2. The lid body 9E made of ceramic can be fired after laminating ceramic green sheets in the same manner as the insulating substrate 2, or can be fired after being formed into a cup shape by stamping ceramic powder. In addition, the lid body 9E may have a recess 92E on its back side for accommodating a leaf spring 14 as an example of a pressing member.

[0163] Since the battery package 1E has the insulating frame 3, the height of the lid body 9E is, for example, lower than that of the lid body 9D shown in Figure 30 . In addition, since the battery package 1E has the lid body 9E, the height of the insulating frame 3 is, for example, lower than that of the insulating frame 3 shown in Figure 26 . Since the heights of the lid body 9E and the insulating frame 3 can be reduced, the thickness (wall width) of the lid body 9E and the insulating frame 3 can be made thinner, and thus the accommodation volume for accommodating the battery 200 can be increased. In other words, the volumetric energy density of the battery module 100E can be improved.

[0164] The insulating housing 3 and the cover 9E can be joined by using a glass frit seal, an AuSn seal, a solder seal, etc. that can provide an airtight seal. When a glass frit seal is used for sealing the insulating housing 3 and the cover 9E, the possibility of a short circuit occurring between the electrode portions 201 and 202 of the battery 200 can be reduced.

[0165] [Other Embodiments]

[0166] The number of batteries 200 in the accommodation space 3s of the insulating housing 3 accommodated in the battery package 1 (1A to 1E) is not limited to one, and can be plural. The number of batteries 200 in the accommodation space 9Fs of the cover 9F accommodated in the battery package 1F is not limited to one, and can also be plural.

[0167] In the accommodation space 3s of the insulating housing 3 in the battery package 1 (1A to 1E) and in the accommodation space 9Fs of the cover 9F in the battery package 1F, a battery control semiconductor element for controlling the battery 200 can be accommodated. The battery control semiconductor element includes a DC / DC converter that supplies a constant power supply voltage, a reset IC that monitors the power supply, and a switch IC that turns on / off the power supply. In addition, electronic components such as coils and capacitors can be accommodated in the accommodation space 3s of the insulating housing 3 in the battery package 1 (1A to 1E) and in the accommodation space 9Fs of the cover 9F in the battery package 1F.

[0168] The battery module 100 (100A to 100E) can have a desiccant that absorbs moisture. The desiccant can be located below the cover 9. The desiccant can be located at a position between the inner side surface of the insulating housing 3 and the side surface of the battery 200 in the battery module 100 (100A to 100C). As the desiccant, for example, silica gel or calcium chloride can be used. If the battery module 100 (100A to 100E) has a desiccant, deterioration of the battery material of the battery 200 due to a chemical reaction with moisture can be suppressed.

[0169] In one embodiment, (1) a battery package, comprising: 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 at one end side of the mounting portion and electrically connected to the first external electrode; a second electrode located at the other end side of the mounting portion and electrically connected to the second external electrode; a cover 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 side by elastic force.

[0170] (2) In the battery package of (1) above, the battery package may further have a frame. The frame is located on the first surface so as to surround the mounting portion, and has an accommodation space for accommodating the battery inside. The cover body may block the opening side of the frame.

[0171] (3) In the battery package of (1) or (2) above, the pressing member may be a metal spring.

[0172] (4) In the battery package of (2) above, the pressing member may be a leaf spring.

[0173] (5) In the battery package of (4) above, the battery package may further have an upper frame located on the upper surface side of the frame and surrounding the opening side of the frame. The leaf spring may have a pressing portion located at the central portion of the leaf spring and in pressure contact with the battery, and a bent portion located between the central portion and the end portion and bent convexly upward. The bent portion may be pressed from above by the cover body. The end side of the leaf spring may be located inside the upper frame on the upper surface of the frame.

[0174] (6) In the battery package of (5) above, the frame may have a concave stepped portion on its opening side. The end side of the leaf spring may be in contact with the bottom surface of the concave stepped portion.

[0175] (7) In the battery package of (6) above, the end side of the leaf spring may be bent into an arc shape and arranged from the bottom surface of the concave stepped portion to the inner side surface.

[0176] (8) In the battery package of (3) above, the cover body may be made of metal. The metal spring may be in contact with the cover body via an insulating member.

[0177] (9) In any one of the battery packages of (4) to (7) above, the battery package may further have an upper frame located on the upper surface side of the frame and surrounding the opening side of the frame. The leaf spring may engage with a part of the frame or a part of the upper frame from below through its two end portions, thereby exerting an elastic force.

[0178] (10) In any one of the battery packages of (4) to (7) above, the battery package may further have an upper frame located on the upper surface side of the frame and surrounding the opening side of the frame. The leaf spring may have a pressing portion located at the central portion of the leaf spring and in pressure contact with the battery. The end side of the leaf spring may be bent into a horizontal U shape and located on the upper surface of the frame, and be pressed from above by the cover body.

[0179] (11) In any one of the battery packages in (4) to (7) above, the battery package may further include an upper frame located on the upper surface side of the frame and surrounding the opening side of the frame. The cover may be made of metal. The leaf spring may have a crimping portion located at the central portion of the leaf spring and crimping against the insulating portion of the battery. The end portion side of the leaf spring may be located on the upper surface of the frame and be pressed from above by the cover via an insulating member.

[0180] (12) In any one of the battery packages in (1) to (11) above, the cover may have a convex portion protruding downward, and the convex portion may serve as the pressing member.

[0181] (13) In the battery package of (12) above, the convex portion may press the battery toward the mounting portion side from above by flipping up and down.

[0182] (14) In any one of the battery packages in (2) to (13) above, the battery package may further include: a first support member located at one end side of the mounting portion, electrically connected to the first electrode, capable of elastic deformation, and supporting one of the two electrode portions from below; and a second support member located at the other end side of the mounting portion, electrically connected to the second electrode, capable of elastic deformation, and supporting the other of the two electrode portions from below.

[0183] (15) In the battery package of (14) above, the insulating substrate may have a partitioning portion located at the mounting portion and partitioning a first accommodation region for accommodating the first support member from a second accommodation region for accommodating the second support member within the accommodation space.

[0184] (16) In any one of the battery packages in (1) to (15) above, the first electrode may have a first bump, and the second electrode may have a second bump.

[0185] (17) In the battery package of (1) to (16) above, the insulating substrate may have a recess opening on the first surface and located between the first electrode and the second electrode.

[0186] (18) In the battery package of (17) above, the battery package may further include a support member located within the recess, capable of elastic deformation, and supporting the battery from below.

[0187] (19) In the battery package of (1) above, the cover body may be cup-shaped, and the cover body may be located on the first surface side so as to cover the mounting portion, and an accommodation space for accommodating the battery may be provided inside the cover body.

[0188] (20) In the battery package of (19) above, the cover body may have a protrusion protruding downward in the central portion thereof, and the cover body may serve as the pressing member.

[0189] (21) In any of the battery packages of (1) to (20) above, the cover body may have a recess for accommodating a part of the pressing member.

[0190] (22) A battery module, comprising: the 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 being electrically connected to the first electrode, and the other of the two electrode portions being electrically connected to the second electrode.

[0191] (23) A method for sealing a battery module for sealing the battery module, wherein the battery module is sealed while pressing the pressing member disposed on the upper surface side of the battery by the cover body.

[0192] As described above, the invention of the present disclosure has been described based on the respective drawings and embodiments. However, the invention of the present disclosure is not limited to the foregoing embodiments. That is, the invention of the present disclosure can be variously modified within the scope shown in the present disclosure, and embodiments obtained by appropriately combining the technical means separately disclosed in different embodiments are also included in the technical scope of the invention of the present disclosure. That is, it should be noted that those skilled in the art can easily make various deformations or corrections based on the present disclosure. In addition, it should also be noted that these deformations or corrections are included within the scope of the present disclosure.

[0193] Description of reference numerals:

[0194] 1 Battery package (battery package of the first embodiment)

[0195] 2 Insulating substrate

[0196] 2a First surface

[0197] 2b Second surface

[0198] 2c Side surface

[0199] 21 Mounting portion

[0200] 22 Partition portion

[0201] 23 Recess

[0202] 3 Insulating housing (housing)

[0203] 3s Accommodating space

[0204] 4 First external electrode

[0205] 5 Second external electrode

[0206] 6 First electrode

[0207] J1 First connection wiring

[0208] 61 First bump

[0209] 7 Second electrode

[0210] J2 Second connection wiring

[0211] 71 Second bump

[0212] 8 Metal housing (upper housing)

[0213] 9 Cover

[0214] 10 Helical spring (pressing member)

[0215] 11 First support member

[0216] 12 Second support member

[0217] 13 Support member

[0218] 100 Battery module (battery module of the first embodiment)

[0219] 200 Battery

[0220] 201 Electrode portion

[0221] 202 Electrode portion

[0222] 203 Insulating portion

[0223] 1A Battery package (battery package of the second embodiment)

[0224] 14 Leaf spring (pressing member)

[0225] 14a Crimping portion

[0226] 14b Bending portion

[0227] 31 Concave step portion

[0228] 31a Bottom surface

[0229] 31i Inner side surface

[0230] 100A Battery Module (Battery Module of the Second Embodiment)

[0231] 1B Battery Encapsulation (Battery Encapsulation of the Third Embodiment)

[0232] 15 Rubber Sheet (Elastic Member)

[0233] 100B Battery Module (Battery Module of the Third Embodiment)

[0234] 1C Battery Encapsulation (Battery Encapsulation of the Fourth Embodiment)

[0235] 91 Convex Portion

[0236] 100C Battery Module (Battery Module of the Fourth Embodiment)

[0237] 1D Battery Encapsulation (Battery Encapsulation of the Fifth Embodiment)

[0238] 9D Cover

[0239] 9Ds Accommodating Space

[0240] 91D Protrusion

[0241] 92D Depression

[0242] 100D Battery Module (Battery Module of the Fifth Embodiment)

[0243] 1E Battery Encapsulation (Battery Encapsulation of the Sixth Embodiment)

[0244] 9E Cover

[0245] 9Es Accommodating Space

[0246] 92E Depression

[0247] 100E Battery Module (Battery Module of the Fifth Embodiment)

Claims

1. An encapsulation body for a battery, wherein it has: 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 at one end side of the mounting portion and electrically connected to the first external electrode; a second electrode located at the other end side of the mounting portion and electrically connected to the second external electrode; a cover 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 side by elastic force.

2. The encapsulation body for a battery according to claim 1, wherein the encapsulation body for a battery further has a frame body that is located on the first surface so as to surround the mounting portion and has an accommodation space for accommodating the battery inside, and the cover closes the opening side of the frame body.

3. The encapsulation body for a battery according to claim 1 or 2, wherein the pressing member is a metal spring.

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

5. The encapsulation body for a battery according to claim 4, wherein the encapsulation body for a battery further has an upper frame body that is located on the upper surface side of the frame body and surrounds the opening side of the frame body, the leaf spring has a pressing portion located at the central portion of the leaf spring and in pressure contact with the battery, and a bending portion located between the central portion and the end portion and bent convexly upward, the bending portion is pressed from above by the cover, and the end portion side of the leaf spring is located inside the upper frame body on the upper surface of the frame body.

6. The encapsulation body for a battery according to claim 5, wherein the frame body has a concave stepped portion on its opening side, and the end portion side of the leaf spring contacts the bottom surface of the concave stepped portion.

7. The encapsulation body for a battery according to claim 6, wherein the end portion side of the leaf spring is bent in an arc shape and is arranged from the bottom surface of the concave stepped portion to the inner side surface.

8. The encapsulation body for a battery according to claim 3, wherein the cover is made of metal, and the metal spring contacts the cover via an insulating member.

9. The encapsulation body for a battery according to any one of claims 4 to 7, wherein the encapsulation body for a battery further has an upper frame body that is located on the upper surface side of the frame body and surrounds the opening side of the frame body, the leaf spring exerts elastic force by engaging with a part of the frame body or a part of the upper frame body from below through its both end portions.

10. The encapsulation body for a battery according to any one of claims 4 to 7, wherein the encapsulation body for a battery further has an upper frame body that is located on the upper surface side of the frame body and surrounds the opening side of the frame body, the leaf spring has a pressing portion located at the central portion of the leaf spring and in pressure contact with the battery, the end portion side of the leaf spring is bent in a horizontal U shape, is located on the upper surface of the frame body, and is pressed from above by the cover.

11. The encapsulation body for a battery according to any one of claims 4 to 7, wherein The encapsulation for the battery further includes an upper frame located on the upper surface side of the frame and surrounding the opening side of the frame. The cover is made of metal. The leaf spring has a crimping portion located at the central portion of the leaf spring and crimped to the insulating portion of the battery. The end side of the leaf spring is located on the upper surface of the frame and is pressed from above by the cover via an insulating member.

12. The encapsulation for the battery according to any one of claims 1 to 11, wherein The cover has a convex portion protruding downward, and the convex portion serves as the pressing member.

13. The encapsulation for the battery according to claim 12, wherein The convex portion presses the battery toward the mounting portion side from above by flipping up and down.

14. The encapsulation for the battery according to any one of claims 2 to 13, wherein The encapsulation for the battery further includes: A first support member, located at one end side of the mounting portion, electrically connected to the first electrode, capable of elastic deformation, and supporting one of the two electrode portions from below; And A second support member, located at the other end side of the mounting portion, electrically connected to the second electrode, capable of elastic deformation, and supporting the other of the two electrode portions from below.

15. The encapsulation for the battery according to claim 14, wherein The insulating substrate has a partitioning portion located at the mounting portion, and in the accommodation space, partitions a first accommodation area for accommodating the first support member from a second accommodation area for accommodating the second support member.

16. The encapsulation for the battery according to any one of claims 1 to 15, wherein The first electrode has a first bump, and the second electrode has a second bump.

17. The encapsulation for the battery according to any one of claims 1 to 16, wherein The insulating substrate has a recess that opens on the first surface and is located between the first electrode and the second electrode.

18. The encapsulation for the battery according to claim 17, wherein The encapsulation for the battery further includes a support member located in the recess, capable of elastic deformation, and supporting the battery from below.

19. The encapsulation for the battery according to claim 1, wherein The cover is cup-shaped, and is configured to cover the mounting portion on the first surface side, and has an accommodation space for accommodating the battery inside the cover.

20. The encapsulation for the battery according to claim 19, wherein The cover has a protrusion protruding downward at its central portion, and the cover serves as the pressing member.

21. The encapsulation for the battery according to any one of claims 1 to 20, wherein The cover has a recess for accommodating a part of the pressing member.

22. A battery module, wherein It includes: The encapsulation for the battery according to any one of claims 1 to 21; and A battery mounted on the mounting portion, one of the two electrode portions being electrically connected to the first electrode, and the other of the two electrode portions being electrically connected to the second electrode.

23. A sealing method for a battery module, which is used to seal the battery module according to claim 22, wherein, while pressing the pressing member disposed on the upper surface side of the battery by using the cover body, the battery module is sealed.

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