Battery packages and battery modules

Abstract

To improve battery capacity relative to external volume. [Solution] The battery package comprises a metal housing for housing battery elements and a lid for sealing the metal housing. The lid has at least one through hole, a terminal electrode positioned through the through hole, and an insulating sealing material for fixing the terminal electrode. The terminal electrode has a protruding portion that extends from the lid toward the metal housing and is spring-loaded.

Description

Technical Field

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

Background Art

[0002] A technique of housing a battery element in a housing member and using it as a solid-state battery is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In such a technique, an improvement in battery capacity with respect to the external volume is desired.

Means for Solving the Problems

[0005] A battery package according to an aspect of the present disclosure includes a metal housing that houses a battery element, and a lid body that seals the metal housing. The lid body has at least one through hole, a terminal electrode positioned through the through hole, and an insulating sealing material that fixes the terminal electrode. The terminal electrode has a protruding portion that protrudes from the lid body toward the metal housing side and has spring properties.

[0006] A battery module according to an aspect of the present disclosure includes the above battery package and at least one battery element.

Effects of the Invention

[0007] [[ID=�2]] According to an aspect of the present disclosure, it is possible to improve the battery capacity with respect to the external volume.

Brief Description of the Drawings

[0008] [Figure 1] This is a cross-sectional view of a battery module according to Embodiment 1 of the present disclosure. [Figure 2] This is a perspective view of the cover according to Embodiment 1 of the present disclosure. [Figure 3] This is an enlarged view of region R in Figure 1. [Figure 4] This is a perspective view of the terminal electrode according to Embodiment 1. [Figure 5] This is a cross-sectional view showing a modified example of a terminal electrode. [Figure 6] This is a cross-sectional view showing a modified example of a terminal electrode. [Figure 7] This is a perspective view showing a modified example of a terminal electrode. [Figure 8] This is a cross-sectional view showing a modified example of a terminal electrode. [Figure 9] This is a perspective view of the lid according to Embodiment 2. [Figure 10] This is a partially enlarged cross-sectional view of a battery module equipped with terminal electrodes according to Embodiment 2. [Figure 11] This is a perspective view of the terminal electrode according to Embodiment 2. [Figure 12] This is a perspective view showing a modified example of a terminal electrode. [Figure 13] This is a perspective view showing a modified example of a terminal electrode. [Figure 14] This is a perspective view showing a modified example of a terminal electrode. [Figure 15] This is a cross-sectional view of a battery module according to Embodiment 3. [Figure 16] This is a cross-sectional view of a battery module according to Embodiment 4. [Figure 17] This is a cross-sectional view of a battery module according to Embodiment 5. [Figure 18] This is a cross-sectional view of a battery module according to Embodiment 6. [Figure 19] This is a cross-sectional view of a battery module according to Embodiment 7. [Figure 20] This is a cross-sectional view taken along the line XX-XX in Figure 19. [Figure 21] This is a cross-sectional view taken along the line XX-XX in another aspect of Figure 19. [Figure 22] It is a cross-sectional view of another aspect of the battery module according to Embodiment 7.

Mode for Carrying Out the Invention

[0009] Hereinafter, a battery package and a battery module according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, each of the drawings referred to below may show only the components necessary for explaining the embodiment in a simplified manner for convenience of explanation. That is, the battery package and the battery module according to each embodiment may include any components not shown in the respective drawings referred to. Also, note that the dimensions of the components in each drawing do not faithfully represent the dimensions of the actual components and the dimensional ratios of each member.

[0010] In the following description, the direction in which the lid is located with respect to the metal casing may be described as the vertical direction. This distinction between up and down is for convenience and does not limit the up and down when the battery module or the like is actually used. [[ID=1^5]]

[0011] 〔Embodiment 1〕 The battery module 900 according to Embodiment 1 will be described with reference to FIGS. 1 to 4. FIG. 1 is a cross-sectional view of the battery module 900. FIG. 2 is a perspective view of the lid 20 according to Embodiment 1. FIG. 3 is an enlarged view of the region R in FIG. 1. FIG. 4 is a perspective view of the terminal electrode 23 according to Embodiment 1. The cross-section shown in FIG. 1 corresponds to the cross-section taken along the line I-I in FIG. 2 as viewed in the arrow direction. In FIG. 2, the outer shape of the metal casing 10 when the lid 20 is attached to the metal casing 10 is shown by a broken line. In the following, the battery package in the present disclosure may be simply referred to as a package, and the battery element may be simply referred to as a battery.

[0012] As shown in Figure 1, the battery module 900 comprises a package 100 and a battery 500. The package 100 comprises a metal housing 10 and a lid 20 that seals the metal housing 10. The lid 20 has at least one through hole 22, terminal electrodes 23 positioned through the through hole 22, and an insulating sealing material 24 that fixes the terminal electrodes 23 to the lid 20. The package 100 according to Embodiment 1 is an example in which there is only one lid 20 and the lid 20 has two terminal electrodes 23. In other words, the package 100 is an example in which two terminal electrodes 23 are provided on the same surface.

[0013] Package 100 is an example of a battery package according to this disclosure, and houses a battery 500 and has terminal electrodes 23 that are connected to a mounting substrate.

[0014] Battery 500 is an example of a battery element according to the present disclosure. In the example shown in Figure 1, battery 500 has an upper electrode 501 and a lower electrode 502. For example, battery 500 may be an all-solid-state battery in which a negative electrode layer, an electrolyte layer, and a positive electrode layer are stacked. In this case, the upper electrode 501 may be the positive electrode of the battery and the lower electrode 502 may be the negative electrode of the battery, or the upper electrode 501 may be the negative electrode of the battery and the lower electrode 502 may be the positive electrode of the battery. Battery 500 may be cylindrical, prismatic, or have any other shape.

[0015] The battery elements relating to this disclosure are not limited to the all-solid-state batteries described above, but may also be, for example, coin cells, primary batteries, secondary batteries, electric double-layer capacitors, or electric double-layer capacitors. Furthermore, the package 100 may house multiple battery elements. An example of housing multiple battery elements will be described later.

[0016] The metal housing 10 houses the battery 500. The metal housing 10 according to Embodiment 1 has a cap shape with a housing recess 11. The metal housing 10 may have a circular bottom surface and a cross-sectional shape parallel to the bottom surface of the housing recess 11, as shown in Figure 2, for example. In other words, the metal housing 10 may be cylindrical. The shape of the metal housing 10 can be arbitrarily changed, for example, depending on the shape of the battery element to be housed. For example, the metal housing 10 may have a cap shape with a rectangular bottom surface and a cross-sectional shape parallel to the bottom surface of the housing recess 11. The term "rectangle" is not limited to a strictly rectangular shape; for example, even if the corners are curved, it is acceptable as long as the overall shape is recognizable as rectangular.

[0017] The metal casing 10 can be easily manufactured, for example, by processing a metal sheet. Furthermore, because the metal casing 10 is made of metal, it can be made thinner than casings made of resin or ceramic. This makes it possible to increase the battery capacity relative to the size of the package 100's exterior.

[0018] The cover 20 seals the metal housing 10 by being joined to it. The cover 20 may be made of metal. The cover 20 has a metal substrate 21, two through holes 22 formed in the metal substrate 21, and two terminal electrodes 23 (23C, 23A). The terminal electrodes 23 are positioned in each of the two through holes 22. The terminal electrodes 23 are positioned through the through holes 22 and are fixed to the metal substrate 21 by an insulating sealant 24. By having one cover 20 have two terminal electrodes 23, a surface-mountable battery module can be realized that has two terminal electrodes 23 facing the same direction relative to the metal housing 10.

[0019] When manufacturing the battery module, the metal housing 10 and the metal base 21 of the lid 20 can be joined by welding or other means. In Embodiment 1, the metal base 21 is a plate-shaped member with a circular planar shape. The planar shape of the metal base 21 is not limited to a circle and can be arbitrarily deformed according to the shape of the metal housing 10. The size of the outer edge of the metal base 21 may be slightly larger than the size of the outer edge of the metal housing, or it may be approximately the same.

[0020] The through-hole 22 may, for example, have a rectangular shape when viewed from above. The shape of the through-hole 22 is not limited to a rectangle and can be arbitrarily changed according to the shape of the terminal electrode 23. As can be seen from Figures 1 and 2, the outer edge of the through-hole 22 is located outside the terminal electrode 23 when the cover 20 is viewed from above. In other words, in a plan view, the terminal electrode 23 is located without overlapping with the metal substrate 21. This reduces the possibility of the terminal electrode 23 coming into contact with the metal substrate 21. For example, if the plan view shape of the through-hole 22 is rectangular, the external electrode portion 233 of the terminal electrode 23 (see Figure 3), which will be described later, may also be rectangular. This ensures a constant distance from the metal substrate 21 around the entire circumference of the external electrode portion 233, and reduces the possibility of the external electrode portion 233 coming into contact with the metal substrate 21.

[0021] The insulating sealant 24 may be, for example, glass such as soda glass or borosilicate glass, or resin. The insulating sealant 24 fixes the terminal electrode 23 in the through hole 22 and seals the through hole 22. The insulating sealant 24 ensures insulation between the terminal electrode 23 and the metal substrate 21. If the insulating sealant 24 is glass, it has lower moisture permeability and higher strength compared to resin, resulting in superior airtight sealing and enabling the realization of a more reliable battery module.

[0022] As shown in Figure 1, the package 100 further comprises a conductor 40 (40C, 40A) connecting the electrodes of the battery 500 to the terminal electrodes 23, and an insulating member 30. In the package 100, the upper electrode 501 of the battery 500 is connected to the terminal electrode 23C via the conductor 40C. The lower electrode 502 of the battery 500 is connected to the terminal electrode 23A via the conductor 40A. The conductor 40 is not particularly limited as long as it is configured to allow electrical conductivity, but for example, it may be formed by bending a conductive plate-shaped member such as metal. Alternatively, the conductor 40 may consist of a combination of a plate-shaped member located between the battery 500 and the insulating member 30, and a wire connecting the plate-shaped members. The insulating member 30 may be a block or sheet made of an insulating material such as resin.

[0023] The package 100 may further include an insulating material 60 located inside the metal housing 10, along the inner surface of the metal housing 10. The insulating material 60 insulates the battery 500 and conductors 40 housed in the metal housing 10 from the metal housing 10. The insulating material 60 may be, for example, a resin coating or ceramic coating applied to the inner surface of the metal housing 10. Alternatively, the insulating material 60 may be a ceramic inner cylinder placed inside the metal housing 10. Alternatively, the insulating material 60 may be formed by thermal spraying ceramic onto the inner surface of the metal housing 10. If the inner surface of the metal housing 10 is not provided with insulating material 60, it may be provided with insulating material covering the portion of the conductors 40 that is not connected to the electrodes or terminal electrodes 23 of the battery 500.

[0024] As shown in Figures 3 and 4, the terminal electrode 23 has a protruding portion 231 that extends from the cover 20 toward the metal housing 10, an embedded portion 232 located within the through hole 22, and an external electrode portion 233 that is electrically connected to the mounting substrate. The protruding portion 231 has a connecting electrode portion 231A that is electrically connected to the electrode of the battery element, and a neck portion 231B that connects the connecting electrode portion 231A and the embedded portion 232. The dashed line L shown in Figure 4 indicates the boundary between the protruding portion 231 (neck portion 231B) and the embedded portion 232.

[0025] The protrusion 231 of the terminal electrode 23 has spring properties. More specifically, the protrusion 231 has spring properties against external forces when the battery 500 is housed in it. The spring properties of the terminal electrode 23 reduce misalignment of the components housed in the metal housing 10 and improve the reliability of the connection with the battery 500 and / or the conductor 40. Furthermore, because the terminal electrode 23 has spring properties, there is no need to place another elastic member inside the metal housing 10, thus increasing the battery capacity relative to the exterior of the package 100.

[0026] As shown in Figure 4, the connecting electrode portion 231A of the terminal electrode 23 extends in a plane parallel to the cover 20, and the neck portion 231B may have spring properties. More specifically, the connecting electrode portion 231A of the protruding portion 231 may have a flat plate portion, and this flat plate portion may extend in a plane parallel to the upper surface of the cover 20. By having the connecting electrode portion 231A extend in a plane parallel to the cover 20, the reliability of the connection with the battery 500 or the conductor 40 can be further improved. In this case, since the neck portion 231B is formed to be thinner than the connecting electrode portion 231A, the spring properties of the protruding portion 231 may be provided by the neck portion 231B. To further improve the spring properties, the neck portion 231B may have a spring structure with multiple bent portions.

[0027] As shown in Figure 4, the embedded portion 232 may extend to the external electrode portion 233 with a width equivalent to that of the neck portion 231B. By forming the embedded portion 232 with a narrow width, the distance between the embedded portion 232 and the inner wall of the through hole 22 increases. In other words, the thickness of the insulating sealant 24 in the radial direction of the through hole 22 increases around the embedded portion 232. As a result, a thin portion is formed in the insulating sealant 24, reducing the possibility of crack formation, and thus increasing the strength of the insulating sealant 24.

[0028] Furthermore, as shown in Figures 2 and 3, the embedded portion 232 may be positioned to penetrate approximately the center of the insulating sealant 24 (approximately the center of the through-hole 22) in a plan view, in the thickness direction of the metal substrate 21. With this configuration, the radial thickness of the through-hole 22 in the surrounding insulating sealant 24 becomes approximately the same. This creates a thin portion in the insulating sealant 24, further reducing the possibility of crack formation.

[0029] Figures 5 and 6 are cross-sectional views showing modified examples of the terminal electrode 23. As shown in Figure 5, the embedded portion 232 of the terminal electrode 23 may penetrate the insulating sealant 24 at an angle. By having the embedded portion 232 inclined with respect to the upper and lower surfaces of the insulating sealant 24, the upper and lower ends of the embedded portion 232 are positioned closer to the outer edge or center of the metal substrate 21 than to the center of the insulating sealant 24. This allows for a larger area of ​​the connecting electrode portion 231A and the external electrode portion 233. Alternatively, as shown in the figure indicated by reference numeral 6001 in Figure 6, the embedded portion 232 of the terminal electrode 23 may have a crank shape with a bent portion. Alternatively, as shown in the figures indicated by reference numerals 6002 and 6003 in Figure 6, the embedded portion 232 of the terminal electrode 23 may have a crank shape with a curved portion. Because the embedded portion 232 has a bent or curved portion, in a plan view, the upper and lower ends of the embedded portion 232 are located closer to the outer edge or center of the metal substrate 21 than to the center of the insulating sealant 24. This allows for a larger area for the connecting electrode portion 231A and the external electrode portion 233.

[0030] Furthermore, as shown in the diagram indicated by reference numeral 6003 in Figure 6, the terminal electrode 23 may be positioned such that its height-direction center is located at the center of the insulating sealant 24 in the thickness direction. In other words, the terminal electrode 23 may be positioned such that, in a cross-sectional view, the embedded portion 232 is point-symmetric with respect to the center of the insulating sealant 24. In this case, the external electrode portion 233 may be separated from the surface of the insulating sealant 24.

[0031] As shown in Figure 3, the external electrode portion 233 extends along the outer surface of the insulating encapsulant 24, and in a plan view, the entire external electrode portion 233 may be located inside the outer edge of the insulating encapsulant 24. If the external electrode portion 233 extends substantially perpendicular to the lid 20 without bending from the embedding portion 232, the electrode on the mounting substrate side needs to have a three-dimensional structure. The shape of the external electrode portion 233 extending along the outer surface of the insulating encapsulant 24 makes it possible to realize a surface-mountable battery module 900. The external electrode portion 233 may also have a flat plate portion. Having a flat plate portion in the external electrode portion 233 increases the connection area with the electrode on the mounting substrate, thereby improving connection reliability.

[0032] Figure 7 is a perspective view showing a modified example of the terminal electrode 23. Figure 8 is a cross-sectional view showing a modified example of the terminal electrode 23. As shown in Figure 7, the external electrode portion 233 may have portions that extend in both the same direction as the extension direction of the connecting electrode portion 231A and in the opposite direction relative to the embedded portion 232. This configuration allows for an increase in the area of ​​the external electrode portion 233. By arranging the terminal electrode 23 shown in Figure 7 such that the extension direction of the connecting electrode portion 231A faces outward, the size of the battery housed within can be increased in plan view (see, for example, Figure 16).

[0033] Furthermore, as shown in the diagram indicated by reference numerals 8001 and 8002 in Figure 8, the terminal electrode 23 may have a bent portion from the connecting electrode portion 231A to the neck portion 231B, and at the boundary between the neck portion 231B and the embedded portion 232. This configuration allows for a wider area of ​​the connecting electrode portion 231A, while also enabling a configuration in which the insulating encapsulant 24 (approximately the center of the through-hole 22) penetrates the metal substrate 21 in the thickness direction when viewed from above.

[0034] Furthermore, as shown in the diagram indicated by reference numeral 8001 in Figure 8, the area of ​​the external electrode portion 233 may be increased by extending the external electrode portion 233 in both the same direction as the extension direction of the connecting electrode portion 231A and in the opposite direction relative to the embedding portion 232. Alternatively, as shown in the diagram indicated by reference numeral 8002 in Figure 8, the area of ​​the external electrode portion 233 may be increased by bending the external electrode portion 233.

[0035] (Summary of Embodiment 1) The battery package (package 100) according to Embodiment 1 comprises a metal housing 10 that houses a battery element (battery 500) and a lid 20 that seals the metal housing 10. The lid 20 has at least one through hole 22, a terminal electrode 23 positioned through the through hole 22, and an insulating sealing material 24 that fixes the terminal electrode 23. The terminal electrode 23 has a protruding portion 231 that protrudes from the lid 20 toward the metal housing 10 and has spring properties. The battery module 900 according to Embodiment 1 also comprises the package 100.

[0036] Because the terminal electrode 23 has a spring-like protrusion 231, there is no need to separately place an elastic member inside the package 100 to improve the connectivity between the battery 500 and the terminal electrode 23. In addition, because the metal housing 10 is made of metal, the thickness of the housing can be reduced. This makes it possible to increase the battery capacity relative to the external volume of the package 100.

[0037] [Embodiment 2] Other embodiments of this disclosure are described below. For convenience of explanation, components having the same function as those described in the above embodiments are denoted by the same reference numerals, and their descriptions are not repeated. Embodiment 2 describes another form of the terminal electrode 23 with reference to Figures 9 to 11.

[0038] Figure 9 is a perspective view of the cover 20X according to Embodiment 2. For the sake of clarity, Figure 9 illustrates how multiple batteries 500A, which are an example of a battery element, are stacked on the terminal electrode 23X. The batteries 500A are button batteries. Figure 10 is a partially enlarged cross-sectional view of a battery module according to the present disclosure, which includes the terminal electrode 23X according to Embodiment 2. Figure 11 is a perspective view of the terminal electrode 23X.

[0039] As shown in Figures 9 to 11, the cover 20X according to Embodiment 2 differs from Embodiment 1 in that it is equipped with a terminal electrode 23X instead of the terminal electrode 23. The terminal electrode 23X has a protruding portion 231X that protrudes from the cover 20X toward the metal housing 10, an embedded portion 232X located within the through hole 22, and an external electrode portion 233X that is electrically connected to the mounting substrate. The protruding portion 231X has a connecting electrode portion 231AX that is electrically connected to the electrode of the battery element, and a neck portion 231BX that connects the connecting electrode portion 231AX and the embedded portion 232X.

[0040] The connecting electrode portion 231AX of the terminal electrode 23X differs from the terminal electrode 23 of Embodiment 1 in that it has a protruding portion P. Specifically, the connecting electrode portion 231AX has a flat plate portion and a protruding portion P that protrudes further toward the battery element than the flat plate portion. The protruding portion P may be located between the flat plate portion and the neck portion 231BX. As shown in Figure 9, the presence of the protruding portion P in the connecting electrode portion 231AX restricts the movement of the battery 500A. This improves the reliability of the connection between the terminal electrode 23X and the battery 500A.

[0041] Figures 12 to 14 are perspective views showing modified examples of the terminal electrode 23X. As shown in Figures 12 and 13, the protrusion P may be formed by bending a part of the connecting electrode portion 231AX upward. Alternatively, as shown in the example in Figure 11, the protrusion P may be located across the entire width of the connecting electrode portion 231AX, or as shown in the example in Figure 14, the width of the protrusion P and the width of the neck portion 231BX may be the same.

[0042] Furthermore, the external electrode portion 233X may have portions that extend in both the same direction as the extension direction of the connecting electrode portion 231AX and in the opposite direction relative to the embedded portion 232X. This configuration allows for an increase in the area of ​​the external electrode portion 233X.

[0043] [Embodiment 3] Embodiment 3 describes an example in which a battery package having two terminal electrodes on the same plane accommodates multiple battery elements, using Figure 15. Figure 15 is a cross-sectional view of a battery module 900A according to Embodiment 3.

[0044] The battery module 900A according to Embodiment 3 comprises a package 100 and a plurality of batteries 500. As shown in Figure 15, in the battery module 900A, the plurality of batteries 500 are connected in parallel. In the example shown in Figure 15, all of the plurality of batteries 500 are housed so that the positive electrode is at the top and the negative electrode is at the bottom. The conductor 40C extending from the positive electrode of the battery 500 is aggregated and connected to the terminal electrode 23C. The conductor 40A extending from the negative electrode of the battery 500 is aggregated and connected in parallel to the terminal electrode 23A.

[0045] By connecting multiple batteries 500 housed within the battery module 900A in parallel, a battery module with a large battery capacity can be realized.

[0046] [Embodiment 4] Embodiment 4 describes an example in which the battery element housed in the battery package according to this disclosure is a battery having electrode portions on the left and right sides, using Figure 16. Figure 16 is a cross-sectional view of the battery module 900B according to Embodiment 4.

[0047] The battery module 900B according to Embodiment 4 comprises a package 100B and a battery 500B. The battery 500B may be, for example, an all-solid-state battery or a capacitor. More specifically, the battery 500B may be, for example, a multi-layer ceramic capacitor (MLCC), a tantalum capacitor, or a film capacitor. The battery 500B has a positive electrode 501B and a negative electrode 502B.

[0048] Package 100B comprises a metal housing 10B and a lid 20B. If the battery 500B is rectangular, the metal housing 10B may be a cup-shaped housing having a rectangular recess in plan view. In this case, the external shape of the metal housing 10B and the lid 20B in plan view may also be rectangular.

[0049] The side walls of the metal housing 10B may be substantially perpendicular to the lid 20B, or they may be inclined as shown in Figure 16. Having substantially perpendicular side walls of the metal housing 10B allows for a larger battery size (battery capacity) relative to the battery module 900B. Having inclined side walls of the metal housing 10B facilitates the molding of the metal housing 10B.

[0050] The lid 20B has terminal electrodes 23C and 23A. Terminal electrode 23C is electrically connected to the positive electrode 501B, and terminal electrode 23A is electrically connected to the negative electrode 502B. The configuration of terminal electrodes 23C and 23A is as shown in Embodiment 1, but terminal electrodes 23C and 23A may be arranged such that, when viewed from above, the connecting electrode portion 231A is closer to the outer edge of the lid 20B than the external electrode portion 233. In other words, terminal electrodes 23C and 23A may be arranged such that the connecting electrode portion 231A extends outward. This makes it easier to connect the two positive electrodes 501B and negative electrodes 502B, which are located separately on the left and right sides, to the terminal electrodes 23C and 23A. Furthermore, it is possible to house the largest possible battery in the metal housing 10B while positioning the terminal electrodes 23C and 23A closer to the center of the lid B. This allows for a higher energy density battery module 900B without increasing the size of the lid 20B or the battery module 900B.

[0051] [Embodiment 5] Embodiment 5 describes an example in which the terminal electrodes 23 are located at the top and bottom of the battery package according to the present disclosure, using Figure 17. Figure 17 is a cross-sectional view of the battery module 900C according to Embodiment 5.

[0052] The battery module 900C according to Embodiment 5 comprises a package 100C and a battery 500. The package 100C comprises a metal housing 10C and two lids 20C. The metal housing 10C is a cylindrical housing and has two openings at the top and bottom. The two lids 20C seal the two openings, respectively. Each lid 20C has one through hole 22 and one terminal electrode 23.

[0053] The terminal electrode 23C located above package 100C is connected to the upper electrode 501 of battery 500, and the terminal electrode 23A located below it is connected to the lower electrode 502. This configuration makes it possible to realize a battery module in which the terminal electrodes 23 are located vertically.

[0054] [Embodiment 6] Embodiment 6 describes an example in which a battery package with terminal electrodes 23 positioned vertically houses multiple battery elements, using Figure 18. Figure 18 is a cross-sectional view of a battery module 900D according to Embodiment 6.

[0055] The battery module 900D according to Embodiment 6 comprises a package 100D and a plurality of batteries 500. As shown in Figure 18, in the battery module 900D, the plurality of batteries 500 are connected in parallel. In the example shown in Figure 18, all of the plurality of batteries 500 are housed such that the positive electrode is located at the top and the negative electrode is located at the bottom. The positive electrode of the battery 500 is connected in parallel to the terminal electrode 23C by a conductor 40C. The negative electrode of the battery 500 is connected in parallel to the terminal electrode 23A by a conductor 40A.

[0056] By connecting multiple batteries 500 in parallel within the battery module 900D, a battery module with a large battery capacity can be realized. If the voltage of the battery module 900C is to be increased, multiple batteries 500 can be connected in series.

[0057] [Embodiment 7] Embodiment 7 describes an example in which the battery package according to the present disclosure further includes a ceramic substrate inside, using Figures 19 to 22. Figure 19 is a cross-sectional view of the battery module 900E according to Embodiment 7. Figure 20 is a cross-sectional view taken along the line XX-XX in Figure 19. Figure 21 is a cross-sectional view taken along the line XX-XX in Figure 19 when the battery module 900E is in a different configuration from that of Figure 20. For simplicity, in Figures 20 and 21, only the outline of the ceramic substrate 70 is shown with a solid line, and only the outline of the battery 500 is shown with a dashed line.

[0058] The battery module 900E according to Embodiment 7 comprises a package 100E and a battery 500. Figure 19 shows an example in which multiple batteries 500 are housed, but the number of batteries 500 housed may be one. The package 100E comprises a metal housing 10E, a lid 20E, and a ceramic substrate 70.

[0059] The ceramic substrate 70 is positioned opposite the lid 20E and is electrically connected to the terminal electrodes 23. The ceramic substrate 70 has a first electrode 71 (71C, 71A) electrically connected to the battery 500 and a second electrode 72 (72C, 72A) electrically connected to the terminal electrodes 23.

[0060] The ceramic substrate 70 has a first surface 701 located on the battery 500 side and a second surface 702 located on the terminal electrode 23 side. The first electrode 71 is located on the first surface 701, and the second electrode 72 is located on the second surface. By including the ceramic substrate 70 in the package 100E, the battery 500 can be stably placed on the ceramic substrate 70. Furthermore, the pattern formation of the first electrode 71 and the second electrode 72 on the ceramic substrate 70 offers a high degree of freedom. Therefore, it is possible to facilitate the connection between the battery 500 and / or the conductor 40 and the first electrode 71, as well as the connection between the second electrode 72 and the terminal electrode 23, and to improve the reliability of these connections.

[0061] In the battery module 900E, multiple batteries 500 are connected in parallel. In the example shown in Figure 19, all of the batteries 500 are housed with the positive electrode at the top and the negative electrode at the bottom. The conductor 40C extending from the positive electrode of battery 500 is aggregated and connected to the first electrode 71C of the ceramic substrate 70. The first electrode 71C is electrically connected to the second electrode 72C via via conductors 73 and / or internal wiring 74 within the ceramic substrate 70. The second electrode 72C is electrically connected to the terminal electrode 23C. The conductor 40A extending from the negative electrode of battery 500 is aggregated and connected to the first electrode 71A. The first electrode 71A is electrically connected to the second electrode 72A via via conductors 73 and / or internal wiring 74 within the ceramic substrate 70. The second electrode 72A is electrically connected to the terminal electrode 23A.

[0062] The metal housing 10E may have a limiting portion on its inner surface that restricts the movement of the ceramic substrate 70 relative to the metal housing 10E. For example, the ceramic substrate 70 may have a rectangular planar shape, as shown in Figure 20. In this case, the metal housing 10E may have a notch 102 that engages with the corner of the ceramic substrate 70 at a position corresponding to the corner of the ceramic substrate 70, as shown in Figure 20. The notch 102 is an example of a limiting portion according to this disclosure.

[0063] Alternatively, the metal housing 10E may have projections 103 that protrude inward and restrict the movement (e.g., rotation) of the ceramic substrate 70. The projections 103 are an example of a restricting portion according to the present disclosure.

[0064] The presence of a limiting portion in the metal housing 10E facilitates alignment between the ceramic substrate 70 and the metal housing 10E. Furthermore, if the metal housing 10E is cylindrical and the ceramic substrate is rectangular, the possibility of the ceramic substrate 70 rotating within the metal housing 10E and separating the second electrode 72 and the terminal electrode 23 can be reduced. The limiting portion, such as the notch 102 or projection 103, may be provided in the insulating material on the inner surface of the metal housing 10E.

[0065] Figure 22 is a cross-sectional view of a battery module 900F, which is another embodiment of the battery module 900E. The battery module 900F has a ceramic substrate 70E instead of a ceramic substrate 70. The ceramic substrate 70E has a first surface 701 located on the battery 500 side and a second surface 702 located on the terminal electrode 23 side. The ceramic substrate 70F has a recess 75 located on the second surface 702 opposite the terminal electrode 23, and the second electrode 72 is located on the bottom surface of the recess 75.

[0066] The terminal electrode 23 is connected to the second electrode 72 within the recess 75, and the recess 75 restricts its lateral movement. This reduces the possibility that the position of the terminal electrode 23 connected to the second electrode 72 may shift, causing the second electrode 72 and the terminal electrode 23 to separate.

[0067] 〔summary〕 (1) A battery package according to Embodiment 1 of the present disclosure comprises a metal housing for housing battery elements and a lid for sealing the metal housing, wherein the lid has at least one through hole, a terminal electrode positioned through the through hole, and an insulating sealing material for fixing the terminal electrode, and the terminal electrode has a protruding portion that protrudes from the lid toward the metal housing and is spring-loaded.

[0068] (2) In the battery package according to embodiment 2 of the present disclosure, in embodiment 1, the metal housing is cap-shaped with a housing recess, and the lid has two through holes and two terminal electrodes.

[0069] (3) In the battery package according to embodiment 3 of the present disclosure, in embodiment 2 above, the terminal electrode has an external electrode portion that is electrically connected to a mounting substrate, the external electrode portion extends along the outer surface of the insulating encapsulant, and in a plan view, the entire external electrode portion is located inside the outer edge of the insulating encapsulant.

[0070] (4) In the battery package according to embodiment 4 of the present disclosure, in embodiment 1, the metal housing is a cylindrical housing, the cylindrical housing has two openings, and has two covers that seal the two openings, and each of the two covers has one through hole and one terminal electrode.

[0071] (5) The battery package according to embodiment 5 of the present disclosure further comprises a ceramic substrate located opposite the lid and electrically connected to the terminal electrodes in any of embodiments 1 to 4, wherein the ceramic substrate has a first electrode electrically connected to the battery element and a second electrode electrically connected to the terminal electrodes, as described in claim 1.

[0072] (6) In the battery package according to embodiment 6 of the present disclosure, in embodiment 5, the metal housing has a limiting portion on its inner surface that restricts the movement of the ceramic substrate relative to the metal housing.

[0073] (7) In the battery package according to embodiment 7 of the present disclosure, in embodiment 5 or 6, the ceramic substrate has a first surface located on the battery element side and a second surface located on the terminal electrode side, and a recess located on the second surface opposite to the terminal electrode, wherein the second electrode is located on the bottom surface of the recess.

[0074] (8) In any of embodiments 1 to 7, the battery package according to embodiment 8 of the present disclosure has an embedded portion located within the through hole, and the protruding portion has a connecting electrode portion electrically connected to the electrode of the battery element and a neck portion connecting the connecting electrode portion and the embedded portion, wherein the connecting electrode portion extends in a plane parallel to the cover and the neck portion is spring-like.

[0075] (9) The battery package according to embodiment 9 of the present disclosure further comprises an insulating material located inside the metal housing, along the inner surface of the metal housing, in any of embodiments 1 to 8 above.

[0076] (10) A battery module according to embodiment 10 of the present disclosure comprises a battery package according to any of embodiments 1 to 9 and at least one battery element.

[0077] (11) The battery module according to embodiment 11 of the present disclosure comprises a plurality of battery elements, wherein the plurality of battery elements are connected in parallel.

[0078] (12) The battery module according to aspect 12 of the present disclosure is, in aspect 10 or 11, a solid-state battery, a coin cell, a primary battery, a secondary battery, an electric double-layer capacitor, or an electric double-layer capacitor having a negative electrode layer, an electrolyte layer, and a positive electrode layer stacked together.

[0079] [Additional Notes] The inventions described in this disclosure have been explained based on the drawings and embodiments. However, the inventions described in this disclosure are not limited to the embodiments described above. That is, the inventions described in this disclosure can be modified in various ways within the scope shown in this disclosure, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the inventions described in this disclosure. In other words, it should be noted that it is easy for those skilled in the art to make various modifications or alterations based on this disclosure. Furthermore, it should be noted that these modifications or alterations are included in the scope of this disclosure. [Explanation of Symbols]

[0080] 900, 900A, 900B, 900C, 900D, 900E, 900F... Battery Modules 100, 100B, 100C, 100D, 100E... Packages (battery packages) 10, 10B, 10C, 10E... Metal casing 20, 20B, 20C, 20E, 20X...Lid body 21...metal substrate 22... Through hole 23, 23A, 23C, 23X...Terminal electrode 24. Insulating sealant 30...Insulating material 40, 40A, 40C... conductor 60...Insulating material 70, 70E, 70F... Ceramic substrates 71, 71A, 71C...1st electrode 72, 72A, 72C...2nd electrode 75···recess 231, 231X...Protrusion 231A, 231AX... Connecting electrode section 231B, 231BX... Neck 232, 232X...Embedded part 233, 233X...External electrode section 500, 500A, 500B...Battery (battery element)

Claims

1. A metal casing that houses the battery components, It comprises a lid that seals the metal housing, The cover has at least one through hole, a terminal electrode positioned through the through hole, and an insulating sealing material for fixing the terminal electrode. The terminal electrodes have a springy projection that extends from the cover toward the metal housing, and is a battery package.

2. The metal housing has a cap shape with a housing recess, The battery package according to claim 1, wherein the cover has two through holes and two terminal electrodes.

3. The terminal electrode has an external electrode portion that is electrically connected to the mounting substrate. The external electrode portion extends along the outer surface of the insulating sealant, The battery package according to claim 2, wherein, in a plan view, the entire external electrode portion is located inward from the outer edge of the insulating encapsulant.

4. The aforementioned metal housing is a cylindrical housing, The cylindrical housing has two openings, It has two covers that seal the two openings, The battery package according to claim 1, wherein each of the two lids has one through hole and one terminal electrode.

5. The lid is positioned opposite to the ceramic substrate and is further electrically connected to the terminal electrodes, The battery package according to claim 1, wherein the ceramic substrate has a first electrode electrically connected to the battery element and a second electrode electrically connected to the terminal electrode.

6. The battery package according to claim 5, wherein the metal housing has a limiting portion on its inner surface that restricts the movement of the ceramic substrate relative to the metal housing.

7. The aforementioned ceramic substrate is The first surface located on the battery element side and the second surface located on the terminal electrode side, The second surface has a recess located opposite to the terminal electrode, The battery package according to claim 5, wherein the second electrode is located on the bottom surface of the recess.

8. The terminal electrode has an embedded portion located within the through hole, The protruding portion has a connecting electrode portion that is electrically connected to the electrode of the battery element, and a neck portion that connects the connecting electrode portion and the embedded portion. The connecting electrode portion extends in a plane parallel to the cover, The battery package according to claim 1, wherein the neck portion has spring properties.

9. The battery package according to claim 1, further comprising an insulating material positioned along the inner surface of the metal housing inside the metal housing.

10. A battery module comprising a battery package according to any one of claims 1 to 9 and at least one battery element.

11. Equipped with multiple battery elements, The battery module according to claim 10, wherein the plurality of battery elements are connected in parallel.

12. The battery module according to claim 10, wherein the battery element is an all-solid-state battery, a coin cell, a primary battery, a secondary battery, an electric double-layer capacitor, or an electric double-layer capacitor, in which a negative electrode layer, an electrolyte layer, and a positive electrode layer are stacked.

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