JP2010033937A - Lithium-ion battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lithium-ion battery capable of achieving high operation voltage and high current density improving safety, battery performance, and handling characteristics. <P>SOLUTION: The lithium-ion battery 1 includes a battery element 2a wherein a positive electrode collector layer 21, a positive electrode active material layer 22, a solid electrolyte layer 23, a negative electrode active material layer 24, and a negative electrode collector layer 25 are laminated, an insulating laminated film 3 for housing the battery element 2a at a vacuum-sealed state, and a package 4 for housing n-sets of battery elements 2a vacuum-sealed in the laminated film 3. The package 4 has a pushing means 5 for pressurizing the battery element 2a in the laminated direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lithium ion battery, and more particularly to a lithium ion battery sealed in a laminate film.

In recent years, there has been an increase in demand for secondary batteries such as high-performance lithium batteries used in personal digital assistants, portable electronic devices, small household power storage devices, motorcycles powered by motors, electric vehicles, hybrid electric vehicles, etc. ing. As the applications for use expand, further improvements in safety and performance of secondary batteries are required.
Inorganic solid electrolytes are generally nonflammable due to their properties and are safer materials than commonly used organic solvent electrolytes. Therefore, development of a lithium battery having high safety using the electrolyte is desired.

  For example, Patent Document 1 discloses that an electrode body that includes a positive electrode containing a predetermined compound, a negative electrode, and a solid electrolyte, and in which the positive electrode and the negative electrode are laminated via the solid electrolyte, is a laminate film. A technique of a solid electrolyte battery is disclosed.

  Patent Document 2 discloses an all-solid battery in which an all-solid battery element in which a solid electrolyte is interposed between a positive electrode and a negative electrode is covered with an exterior body, and pressure is applied to the all-solid battery element inside the exterior body. The technology of an all-solid battery in which the all-solid-state battery element and the exterior body are in close contact with each other is disclosed.

  Patent Document 3 includes a positive electrode, a negative electrode disposed opposite to the positive electrode, and a solid electrolyte layer formed on at least one surface of the positive electrode and the negative electrode. The positive electrode and the negative electrode are a solid electrolyte layer. Is wound in the longitudinal direction in a state of being laminated so that the sides formed with each other face each other, sandwiched by an exterior film made of an insulating material, and sealed by heat-sealing the periphery of the exterior film under reduced pressure . The positive electrode is made smaller than the negative electrode, and a technique for manufacturing a solid electrolyte battery in which the solid electrolyte layer formed on the positive electrode smaller than the negative electrode is larger than the positive electrode is disclosed. ing.

  Further, in Patent Document 4, in an all-solid battery in which a positive electrode and a negative electrode are incorporated in a battery case via a solid electrolyte, a gap between at least one of the positive electrode terminal or the negative electrode terminal of the battery and an electrode connected to the terminal is disclosed. Discloses an all-solid-state battery technology characterized in that a PTC element and a low melting point alloy fuse are connected in series in a battery case.

  Patent Document 5 discloses a PTC element having an element body whose resistance value increases with a temperature rise in a predetermined temperature region, and a pair of first and second electrode plates bonded to the front and back surfaces of the element body. And at least one first electrode plate of the electrode plates is integrally formed with the first element joining piece to be joined to the element body and the first element joining piece, A first terminal joining piece extending from the piece toward the outside of the element body, and the first terminal joining piece is joined to a terminal plate made of a clad plate in which plates of two or more kinds of materials are laminated. The technology of the PTC element currently used is disclosed.

  In Patent Document 6, an electrode body and an electrolyte wound with a separator interposed between a positive electrode and a negative electrode are accommodated in an exterior body in which a resin layer is provided on the inner surface side of the metal layer, and a positive electrode terminal In the thin battery in which the negative electrode terminal is extended to the outside through the sealing portion of the outer package, each side of the separator of the wound electrode assembly is close to two sides facing each other on both sides of the folded portion of the folded package In this way, the electrode body is accommodated in the exterior body, and the two sides facing each other on both sides of the folded portion and the resin layers on the inner surface side of the portion facing the folded portion are bonded to each other to seal the exterior body. Technology is disclosed.

JP 2002-117844 A JP 2000-106154 A JP 2007-180039 A Japanese Patent Laid-Open No. 11-144704 JP 2008-91505 A JP 2000-277062 A

  However, the techniques described in Patent Documents 1 to 6 described above can improve safety and handleability for one battery element, for example, but in a lithium ion battery with an increased operating voltage, There has been a problem that safety, battery performance, handling, etc. cannot be improved.

  The present invention has been made in view of the above problems, and provides a lithium ion battery that can obtain a high operating voltage and a high current density, and that can improve safety, battery performance, handleability, and the like. With the goal.

In order to achieve the above object, a lithium ion battery of the present invention includes a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer capable of occluding and releasing lithium ions, and a negative electrode current collector layer. The battery element is stacked, and an insulating laminate film that houses the battery element in a sealed state.
If it does in this way, since a battery element is interrupted | blocked from external air, decomposition | disassembly of a solid electrolyte can be suppressed and the fall of battery performance can be prevented. Moreover, since a battery element is accommodated in an insulating laminate film, handling property and safety can be improved.

Preferably, the battery element is vacuum-sealed with the laminate film.
If it does in this way, since the same pressure as atmospheric pressure will act on a battery element, each contact surface pressure of a battery element can be raised, and the fall of a current density can be suppressed. Moreover, deterioration of a solid electrolyte can be suppressed and a fall of battery performance can be prevented.

Preferably, the material of the solid electrolyte layer is a sulfide-based glass having Li, S, and P, or a sulfide-based glass ceramic having Li, S, and P.
If it does in this way, since a solid electrolyte layer contains sulfide, current density can be raised.

Moreover, it is preferable that one or two or more packages that store the battery elements sealed in the laminate film are provided, and the packages pressurize the battery elements in the stacking direction.
If it does in this way, each contact surface pressure of a battery element can be raised further, and the fall of current density can further be controlled.

Preferably, a positive electrode terminal connected to the positive electrode current collector layer and a negative electrode terminal connected to the negative electrode current collector layer, wherein at least one of the positive electrode terminal and the negative electrode terminal is a PTC element, It should be connected.
If it does in this way, when a battery element overheats, since an electric current can be automatically interrupted | blocked, the safety | security of a lithium ion battery can be improved.
The PTC element is a Positive Temperature Coefficient element.

Preferably, a positive electrode terminal connected to the positive electrode current collector layer and a negative electrode terminal connected to the negative electrode current collector layer are provided, and at least one of the positive electrode terminal and the negative electrode terminal is connected to a fuse. It is good to be.
If it does in this way, when overcurrent flows into a battery element, since an electric current can be automatically interrupted | blocked, the safety | security of a lithium ion battery can be improved.

  According to the lithium ion battery of the present invention, a high operating voltage and a high current density can be obtained, and safety, battery performance, handleability, and the like can be improved.

[First Embodiment of Lithium Ion Battery]
1A and 1B are schematic views of a lithium ion battery according to a first embodiment of the present invention, in which FIG. 1A shows a plan view and FIG. 1B shows an AA cross-sectional view.
In FIG. 1, a lithium ion battery 1 includes a battery element 2 and a laminate film 3.
The battery element 2 includes a positive electrode current collector layer 21 having a positive electrode terminal 211, a positive electrode active material layer 22, a solid electrolyte layer 23, a negative electrode active material layer 24, and a negative electrode current collector layer 25 having a negative electrode terminal 251. The structure is laminated in this order.
Furthermore, although the lithium ion battery 1 of this embodiment is a lithium secondary battery normally, it shall also contain a lithium primary battery.

(Solid electrolyte layer)
The solid electrolyte layer 23 is a thin film of lithium ion conductive solid electrolyte. The material of the solid electrolyte layer 23 of this embodiment is a sulfide-based glass having Li, S, and P, or a sulfide-based glass ceramic having Li, S, and P. If it does in this way, since the solid electrolyte layer 23 contains sulfide, the current density of the lithium ion battery 1 can be improved.
As a method for producing the solid electrolyte layer 23, a coating method, a pressing method, an AD (aerosol deposition) method, a vapor deposition method, or the like can be used. Moreover, it is good also as a structure which has a mesh etc. inside for shape maintenance.

The solid electrolyte layer 23 has a substantially rectangular thin plate shape, and the lower surface is in contact with the positive electrode active material layer 22 and the upper surface is in contact with the negative electrode active material layer 24.
The shape and size of the solid electrolyte layer 23 are not particularly limited. In addition, the material of the solid electrolyte layer 23 of the present invention is not limited to the above materials, and for example, a material composed of an organic compound, an inorganic compound, or both an organic / inorganic compound can be used. A well-known thing can be used in the battery field | area.

(Positive electrode active material layer)
As a material constituting the positive electrode active material layer 22, a material used as a positive electrode active material in the battery field can be used. For example, in the sulfide system, titanium sulfide (TiS ₂ ), molybdenum sulfide (MoS ₂ ), iron sulfide (FeS, FeS ₂ ), copper sulfide (CuS), nickel sulfide (Ni ₃ S ₂ ), and the like are used. Preferably TiS ₂ is used.
In the oxide system, bismuth oxide (Bi ₂ O ₃ ), bismuth lead acid (Bi ₂ Pb ₂ O ₅ ), copper oxide (CuO), vanadium oxide (V ₆ O ₁₃ ), lithium cobalt oxide (LiCoO ₂ ) Lithium nickelate (LiNiO ₂ ), lithium manganate (LiMnO ₂ ) and the like are used. It is also possible to use a mixture of these. Preferably, lithium cobaltate is used.

Further, the positive electrode active material layer 22 has a rectangular thin plate shape substantially the same as the solid electrolyte layer 23, and the lower surface is in contact with the positive electrode current collector layer 21 and the upper surface is in contact with the solid electrolyte layer 23.
As the material constituting the positive electrode active material layer 22, in addition to the above, niobium selenide (NbSe ₃₎ is used. In addition, although not shown in the drawing, a material having electrical conductivity for allowing electrons to smoothly move in the positive electrode active material as a conductive auxiliary agent to the material constituting the positive electrode active material layer 22. You may add suitably. The electrically conductive substance is not particularly limited. For example, a conductive substance such as acetylene black, carbon black, or carbon nanotube or a conductive polymer such as polyaniline, polyacetylene, or polypyrrole may be used. They can be used alone or in combination.

(Positive electrode current collector layer)
The material of the positive electrode current collector layer 21 is copper, magnesium, stainless steel, titanium, iron, cobalt, nickel, zinc, aluminum, germanium, indium, lithium, or an alloy thereof.
The positive electrode current collector layer 21 has a rectangular thin plate shape that is substantially the same as the positive electrode active material layer 22. The lower surface is in contact with the laminate film 3, and the upper surface is in contact with the positive electrode active material layer 22.
In addition, the positive electrode current collector layer 21 of the present embodiment has a long and thin plate-like positive electrode terminal 211 protruding from one corner of one side of the rectangle. The positive electrode terminal 211 is usually press-molded integrally with the positive electrode current collector layer 21.

(Negative electrode active material layer)
As a material constituting the negative electrode active material layer 24, a material used as a negative electrode active material capable of occluding and releasing lithium ions in the battery field can be used. For example, carbon materials, specifically artificial graphite, graphite carbon fiber, resin-fired carbon, pyrolytic vapor-grown carbon, coke, mesocarbon microbeads (MCMB), furfuryl alcohol resin-fired carbon, polyacene, pitch-based carbon Examples include fibers, vapor grown carbon fibers, natural graphite, and non-graphitizable carbon. Or it may be a mixture thereof. Preferably, it is artificial graphite.
In addition, metallic lithium, metallic indium, metallic aluminum, metallic silicon, and alloys combined with these metals themselves, other elements, and compounds can be used as the material of the negative electrode active material layer 24.
Furthermore, the negative electrode active material layer 24 may be mixed with the solid electrolyte used in the solid electrolyte layer 23.
The negative electrode active material layer 24 has a rectangular thin plate shape that is substantially the same as the solid electrolyte layer 23, and the lower surface is in contact with the solid electrolyte layer 23 and the upper surface is in contact with the negative electrode current collector layer 25.

(Negative electrode current collector layer)
The material of the negative electrode current collector layer 25 is copper, magnesium, stainless steel, titanium, iron, cobalt, nickel, zinc, aluminum, germanium, indium, lithium, or an alloy thereof.
The negative electrode current collector layer 25 has a rectangular thin plate shape that is substantially the same as the negative electrode active material layer 24, and the lower surface is in contact with the negative electrode active material layer 24 and the upper surface is in contact with the laminate film 3.
Further, the negative electrode current collector layer 25 of the present embodiment has an elongated thin plate-like negative electrode terminal 251 that protrudes from the other corner (one of the corners facing the positive electrode terminal 211) on one side of the rectangle. . The negative electrode terminal 251 is usually press-molded integrally with the negative electrode current collector layer 25.

(Laminate film)
The laminate film 3 has insulating properties and flexibility, and stores the battery element 2 in a sealed state.
The laminate film 3 of the present embodiment is a substantially rectangular bag that houses the battery element 2. That is, the laminate film 3 is formed into a bag shape by heat-welding the three sides of the rectangle in advance by the welding portion 33, and the remaining one side of the rectangle is the opening end portion 31. The battery element 2 is accommodated from the opening end 31, and then the opening end 31 is heat-welded so as to sandwich the positive electrode terminal 211 and the negative electrode terminal 251. By this welding, the laminate films 3 are welded to each other, and the laminate film 3 that comes into contact with the positive electrode terminal 211 and the negative electrode terminal 251 is brought into close contact with the positive electrode terminal 211 and the negative electrode terminal 251 by the welding portion 32. Thus, the laminate film 3 accommodates the battery element 2 in a sealed state.
If it does in this way, since the battery element 2 is interrupted | blocked from external air, decomposition | disassembly of the solid electrolyte in the solid electrolyte layer 23 can be suppressed, and the fall of battery performance can be prevented. Moreover, since the battery element 2 is accommodated by the insulating laminate film 3, the handleability and safety can be improved.

Further, the laminate film 3 of the present embodiment evacuates the inside of the laminate film 3 before the opening end portion 31 is welded, and the battery element 2 is vacuum-sealed. This evacuation is usually evacuated to several hundred to several tens of Pa, but is not particularly limited.
In this way, the battery element 2 is subjected to substantially the same pressure as the atmospheric pressure. Therefore, in the battery element 2, the contact surface pressure between the positive electrode current collector layer 21 and the positive electrode active material layer 22, the positive electrode active material layer 22 and the solid The contact surface pressure with the electrolyte layer 23, the contact surface pressure between the solid electrolyte layer 23 and the negative electrode active material layer 24, and the contact surface pressure between the negative electrode active material layer 24 and the negative electrode current collector layer 25 can be increased. A decrease in current density can be suppressed. In addition, deterioration of the solid electrolyte in the solid electrolyte layer 23 can be suppressed, and deterioration in battery performance can be prevented. Furthermore, since the laminate film 3 having insulating properties is in close contact with the side surfaces of the positive electrode current collector layer 21, the positive electrode active material layer 22, the solid electrolyte layer 23, the negative electrode active material layer 24, and the negative electrode current collector layer 25, for example, The concern that the positive electrode active material layer 22 and the negative electrode active material layer 24 are short-circuited can be eliminated.

The structure of the laminate film 3 (for example, the type and quantity of the laminated films) is not particularly limited, and is usually a structure excellent in insulation, flexibility, heat resistance, weldability, strength, etc. Is used.
For example, an aluminum laminate film or the like is suitably used as the laminate film 3.
In order to improve the adhesion between the positive electrode terminal 211 and the negative electrode terminal 251 and the laminate film 3, a primer, an adhesive, or the like may be used.

As described above, according to the lithium ion battery 1 of the present embodiment, since the battery element 2 is cut off from the outside air, the decomposition of the solid electrolyte can be suppressed and the battery performance can be prevented from being lowered. Moreover, since the battery element 2 is accommodated in the insulating laminate film 3, handling property and safety can be improved.
Furthermore, since substantially the same pressure as the atmospheric pressure acts on the battery element 2, each contact surface pressure of the battery element 2 can be increased, and a decrease in current density can be suppressed. Moreover, deterioration of a solid electrolyte can be suppressed and a fall of battery performance can be prevented.
Moreover, since the solid electrolyte layer 23 contains sulfide, the current density can be improved.

[Second Embodiment of Lithium Ion Battery]
FIG. 2 shows a schematic front view of the lithium ion battery according to the second embodiment of the present invention.
3 shows a schematic BB cross-sectional view in FIG.
2 and 3, the lithium ion battery 1a includes n (n is a natural number of 4 or more) battery elements 2a vacuum-sealed in the laminate film 3, as compared with the lithium ion battery 1 of the first embodiment described above. The difference is that they are housed in the package 4 in a stacked state. Other configurations are almost the same as those of the lithium ion battery 1. In this embodiment, n is a natural number of 4 or more, but in the present invention, n may be a natural number.
2 and 3, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
Moreover, although the lithium ion battery 1a is a lithium secondary battery normally, it shall also include a lithium primary battery.

(Battery element)
Compared with the battery element 2 of the first embodiment, the battery element 2 a of the present embodiment has a plug-in type pin terminal (male) 212 connected to the positive electrode terminal 211 and a plug-in type pin terminal (female) 252 connected to the negative electrode terminal 251. Further, it is different in that the base portions of the plug-in type pin terminal (male) 212 and the plug-in type pin terminal (female) 252 are vacuum-sealed by the laminate film 3.
The remaining configuration of the battery element 2a is substantially the same as that of the battery element 2.

The plug-in type pin terminal (male) 212 and the plug-in type pin terminal (female) 252 are one-touch connectors.
Although not shown in FIGS. 2 and 3 so as not to be complicated, the plug-in type pin terminals (male) 212 of the nth battery element 2a farthest from the pressing means 5 are plug-in type pin terminals (male) at both ends. ) 212 and the plug-in type pin terminal (female) 252 are connected to the external connection terminal (positive electrode) 421 provided on the upper lid 42.
Further, the plug-in type pin terminal (female) 252 of the n-th battery element 2a is connected to the n−1th-th line by wiring connected to the plug-in type pin terminal (male) 212 and the plug-in type pin terminal (female) 252 at both ends. It is connected to a plug-in type pin terminal (male) 212 of the battery element 2a. In this way, the n battery elements 2a are connected in series, and the plug-type pin terminal (female) 252 of the first battery element 2a closest to the pressing means 5 has plug-type pin terminals (male) at both ends. The external connection terminal (negative electrode) 422 provided on the upper lid 42 is connected by wiring to which 212 and the plug-in type pin terminal (female) 252 are connected.
Thus, the battery element 2a of this embodiment can greatly improve the handleability by including the one-touch type connector. Moreover, since the electrode does not expose the plug-in type pin terminal (male) 212 and the plug-in type pin terminal (female) 252, safety can be greatly improved.

Here, preferably, a PTC element (not shown) is connected in series to the wiring that connects the insertion-type pin terminal (female) 252 and the insertion-type pin terminal (male) 212 of the adjacent battery element 2a. It is good to have.
If it does in this way, when the battery element 2a overheats, since an electric current can be interrupted | blocked automatically, the safety | security of the lithium ion battery 1a can be improved.

Preferably, a fuse (not shown) is connected in series to the wiring connecting the plug-in type pin terminal (female) 252 and the external connection terminal (negative electrode) 422 of the first battery element 2a. It is good to be.
If it does in this way, when overcurrent flows into battery element 2a, since an electric current can be automatically interrupted | blocked, the safety | security of lithium ion battery 1a can be improved.
In the present embodiment, the above-described wiring is used, but a terminal block (not shown) attached to the upper lid 42 may be used.

(package)
The package 4 has a substantially rectangular parallelepiped box 41 having a flange at the top, and a substantially rectangular upper lid 42 for closing the flange. The box body 41 and the upper lid 42 of the present embodiment are made of metal. However, it is not limited to metal, for example, it may be made of resin.
The box 41 stores n battery elements 2a vacuum-sealed on the laminate film 3 in a stacked state.
The upper lid 42 is provided with an external connection terminal (positive electrode) 421 and an external connection terminal (negative electrode) 422, and is screwed to the flange of the box body 41.

Here, it is preferable that the package 4 includes a pressing unit 5 for pressing the n battery elements 2a vacuum-sealed on the laminate film 3 in the stacking direction.
The pressing means 5 is fastened to a substantially rectangular flat plate-shaped pressing plate 51 in which an elastic body 52 made of rubber or resin is embedded, and a female screw formed on the front plate of the box body 41, and the elastic body 52 is The bolt 53 is pressed in the pressing direction. In addition, since the pressing plate 51 is pressed by the four bolts 53, the battery element 2a can be pressed almost uniformly.
If it does in this way, each contact surface pressure of the n battery element 2a accommodated so that it may laminate | stack can be raised further, and the fall of a current density can further be suppressed. Further, by loosening the bolt 53, the battery element 2a can be easily replaced. That is, the performance and handleability of the battery can be improved.

  The means for pressing the battery element 2a is not limited to the pressing means 5 described above. For example, although not shown, a metal spring may be used instead of the elastic body 52 described above. Moreover, when the battery element 2a is one piece or several pieces, you may resin-mold in the state which pressed the battery element 2a in the press direction. Furthermore, the battery element 2a sealed in the laminate film 3 may be pressed in the stacking direction by sandwiching the battery element 2a between a metal plate and a resin plate.

As described above, according to the lithium ion battery 1a of the present embodiment, n battery elements 2a can be connected in series in the package 4, so that the operating voltage can be increased, Safety can be improved by the battery element 2a being solid.
Further, even when a large number of battery elements 2a are used, the pressing means 5 causes the contact surface pressure between the positive electrode current collector layer 21 and the positive electrode active material layer 22 in each battery element 2a, and the positive electrode active material layer 22 to be used. The contact surface pressure between the solid electrolyte layer 23 and the solid electrolyte layer 23, the contact surface pressure between the solid electrolyte layer 23 and the negative electrode active material layer 24, and the contact surface pressure between the negative electrode active material layer 24 and the negative electrode current collector layer 25 are further increased. And a decrease in current density can be further suppressed.
Furthermore, the battery element 2a is provided with one-touch type connectors (plug-in type pin terminal (male) 212 and plug-in type pin terminal (female) 252), so that the handleability can be greatly improved. Moreover, since the electrode does not expose the plug-in type pin terminal (male) 212 and the plug-in type pin terminal (female) 252, safety can be greatly improved.

The lithium ion battery according to the present invention has been described with reference to the preferred embodiments. However, the lithium ion battery according to the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. It goes without saying that implementation is possible.
For example, although not shown, the lithium ion battery 1a has a terminal block and current control means (for example, the voltage and current of each battery element 2a detected on the lower surface of the upper lid 42, and a power transistor based on this detection signal. A sequencer for controlling the current and the like may be provided, and the amount of current may be automatically controlled when an overcurrent flows through the battery element 2a. If it does in this way, the safety | security and added value of the lithium ion battery 1a can be improved.

Moreover, the lithium ion battery 1a may have a structure in which the package 4 can be sealed, and an absorbent that adsorbs hydrogen sulfide may be accommodated therein. In this way, even if the laminate film 3 or the battery element 2a is destroyed due to an accident or the like and hydrogen sulfide is generated, the outflow of hydrogen sulfide to the outside of the package 4 can be prevented.
Furthermore, when the package 4 is an airtight container, a safety valve for suppressing an increase in internal pressure may be provided.

  Moreover, the lithium ion battery 1 of the first embodiment may have a configuration in which the PTC element and the fuse in the second embodiment are provided in a state of being housed in the laminate film 3. In this way, the safety of the lithium ion battery 1 can be improved.

1A and 1B are schematic views of a lithium ion battery according to a first embodiment of the present invention, in which FIG. 1A shows a plan view and FIG. 1B shows an AA cross-sectional view. FIG. 2 shows a schematic front view of the lithium ion battery according to the second embodiment of the present invention. FIG. 3 shows a schematic BB cross-sectional view in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a Lithium ion battery 2, 2a Battery element 3 Laminate film 4 Package 5 Pressing means 21 Positive electrode collector layer 22 Positive electrode active material layer 23 Solid electrolyte layer 24 Negative electrode active material layer 25 Negative electrode collector layer 31 Open end 32 Welding part 33 Welding part 41 Box 42 Upper lid 51 Press plate 52 Elastic body 53 Bolt 211 Positive electrode terminal 212 Plug-in type pin terminal (male)
251 Negative terminal 252 Plug-in type pin terminal (female)
421 External connection terminal (positive electrode)
422 External connection terminal (negative electrode)

Claims (4)

A battery element in which a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer capable of occluding and releasing lithium ions, and a negative electrode current collector layer;
A lithium ion battery, comprising: an insulating laminate film that houses the battery element in a sealed state.   The lithium ion battery according to claim 1, wherein the battery element is vacuum-sealed by the laminate film.   3. The lithium according to claim 1, wherein the material of the solid electrolyte layer is a sulfide-based glass having Li, S, and P, or a sulfide-based glass ceramic having Li, S, and P. 4. Ion battery.   It has one or two or more packages that contain the battery elements sealed in the laminate film, and the packages pressurize the battery elements in the stacking direction. The lithium ion battery according to item.

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