JP2001256931A - Battery, battery container, battery container material, and method of manufacturing battery container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make clearance hardly produced in a battery case that encloses power-generating elements and to prevent performance of the battery from lowering caused by the clearance. SOLUTION: The battery is equipped with power generating elements and a battery case accommodating the said elements. The battery case is composed of a metallic material, and provided with a resin layer on its inner face. A part of the said resin layer is missing, where metallic face of the battery case exposes to be electrically connected to the power generating elements.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to, for example, a lithium secondary battery.

[0002]

At present, mobile communication devices,
Miniaturization of electronic devices such as notebook computers, palmtop computers, integrated video cameras, portable CD players, headphone stereos, and cordless telephones.
Lighter and more portable, secondary batteries have been widely used as power supplies.

As secondary batteries, lead secondary batteries and nickel-cadmium batteries are well known.

Further, non-aqueous electrolyte secondary batteries using a material capable of doping and undoping lithium metal, a lithium alloy, or lithium ion as a negative electrode active material have been actively studied as being capable of obtaining a high energy density. Have been.

Above all, attention has been paid to cylindrical and rectangular spiral nonaqueous electrolyte secondary batteries in which the positive and negative strip electrodes are spirally wound through a separator to increase the electrode area, because they can be rapidly charged and discharged. I'm taking a bath.

This type of secondary battery has the structure shown in FIG. In FIG. 6, 1 is a negative electrode, 2 is a positive electrode, and 3 is a separator, and these constitute a power generating element.
The negative electrode 1 is, for example, a slurry formed by dispersing a negative electrode mixture composed of a mixture of pulverized needle coke (negative electrode active material) and polyvinylidene fluoride (binder) in a solvent, in the form of a strip of copper foil having a thickness of 10 μm. Is coated and dried on both surfaces of the negative electrode current collector, and compression-molded by a roller press machine to obtain a strip-shaped negative electrode 1. The positive electrode 2 is formed by firing a mixture of lithium carbonate and cobalt carbonate, for example, to form powdery LiCo.
O2 (a positive electrode active material) was obtained, and a slurry in which a positive electrode mixture obtained by adding graphite (a conductive material) and polyvinylidene fluoride (a binder) to a solvent was dispersed in a strip of aluminum foil having a thickness of 20 μm. Is coated and dried on both surfaces of the positive electrode current collector, and compression-molded by a roller press to form a belt-shaped positive electrode 2. The separator 3 is made of, for example, a microporous polypropylene film. Then, the negative electrode 1, the separator 3, the positive electrode 2, and the separator 3 are laminated in this order, and the layers are spirally wound. The spirally wound body is housed in the battery container body 4 to collect the negative electrode. In addition, one end of the negative electrode lead is attached to the negative electrode 1, the other end is connected to the battery container body 4, and one end of the positive electrode lead is attached to the positive electrode 2 to collect the current of the positive electrode. And a non-aqueous electrolyte in which a lithium salt is dissolved in an organic solvent is injected into the battery container body 4. By the way, metal materials are used for containers of this type of secondary battery.

However, since the electrolyte is injected into the container body 4, there is a risk of corrosion. When corrosion progresses and a through-hole is formed, the value as a battery is lost. As described above, the container usually includes the container body 4 and the lid 5. Then, after the power generating element is put in the container body 4 and the electrolytic solution is injected, the battery is completed by combining the lid 5. At this time, the integrity (sealing property) of the lid 5 with respect to the container body 4 must be perfect. For example, if a gap is formed, moisture may enter from here. When such a phenomenon occurs, that is, when moisture in the air enters the battery, the battery performance deteriorates due to a reaction with a battery active material, an electrolyte, or the like. Further, leakage of the electrolytic solution occurs from the gap. Therefore, the first problem to be solved by the present invention is:
It is difficult to create a gap in the battery container containing the power generation element,
An object of the present invention is to prevent a decrease in battery performance due to the gap.
A second problem to be solved by the present invention is to provide a technology that facilitates battery assembly.

The first and second objects are a battery comprising a power generating element and a battery container in which the power generating element is stored, wherein the battery container is made of a metal material. A resin layer is provided on the inner surface of the metal battery case, and a part of the resin layer is omitted, and the metal surface of the battery case is exposed to the inside of the battery case in the portion. The battery is characterized in that the exposed portion is electrically connected to the power generating element.

A battery comprising a power generating element and a battery container accommodating the power generating element, wherein the battery container includes a container body and a lid, and the container body is formed using a metal material. A resin layer is provided on the inner surface of the metal container main body, and a part of the resin layer is omitted, and the metal surface of the container main body is exposed inside the battery container in this part. And the battery is electrically connected to the power generating element at the exposed portion.

Furthermore, a battery comprising a power generating element and a battery container in which the power generating element is stored, wherein the battery container comprises a container body and a lid, wherein the container main body and the lid are made of a metal material And a resin layer is provided on the inner surface of the metal container main body, and a part of the resin layer is omitted, and the metal surface of the container main body in this portion is a battery container. It is exposed on the inside, is electrically connected to the power generating element at the exposed portion, and a resin layer is provided on at least one surface of the lid,
The problem is solved by a battery characterized in that when a battery container is configured by combining a container body and a lid, a resin layer provided on the lid and a resin layer provided on the container body are polymerized.

In particular, the present invention relates to a battery including a power generating element and a battery container housing the power generating element, wherein the battery container includes a container body and a lid, and the container body and the lid are made of a metal material. A resin layer is provided on the inner surface of the metal container main body, and a part of the resin layer is omitted, and the metal surface of the container main body is inside the battery container in this part. And is electrically connected to the power generating element at the exposed portion, and a resin layer is provided on at least one surface of the lid, and the battery is formed by combining the container body and the lid. In a case where a container is formed, a battery is characterized in that a resin layer provided on a lid body and a resin layer provided on a container body are fused.

[0011] A battery container for accommodating a power generating element, wherein the battery container is made of a metal material, and a resin layer is provided on an inner surface of the metal battery container. The problem is solved by a battery container characterized in that a part of the resin layer is omitted and a metal surface of the battery container is exposed inside the battery container in the portion.

[0012] A battery container for storing a power generating element, wherein the battery container is composed of a container body and a lid, and the container body is made of a metal material. Is provided with a resin layer on the inner surface thereof, and a part of the resin layer is omitted, and the metal surface of the container body is exposed to the inside of the container in this portion. Is done.

[0013] Also, a material of a battery container for accommodating a power generating element, wherein the material is made of a metal material, and a resin layer is provided on at least one surface of the metal material. The problem is solved by the material of the battery container, wherein the portion is missing and the metal surface is exposed in the portion.

A method for manufacturing a battery container accommodating a power generating element, the method comprising: attaching a resin film to at least one surface of a metal plate; and removing a part of the resin film so that the metal surface is exposed. Forming a composite plate of a resin film and a metal plate into a predetermined shape.

That is, the container body of the battery container, especially the battery container for housing the power generating element, is made of, for example, aluminum or an aluminum alloy (also simply referred to as an aluminum alloy).
And stainless steel and other metal materials.

Usually, the container is composed of a container body and a lid. Then, after the power generation element is stored in the container body, the lid is closed. The lid is usually closed by caulking or the like. At this time, if the joint between the container body and the lid is made of metal, it is extremely difficult to eliminate the gap between them. In some cases, it may be necessary to employ a cumbersome means such as welding.

However, at this time, if resin is interposed at the joint between the container body and the lid, it is difficult to form a gap. That is,
The hermeticity between the container body and the lid is improved. In particular, if they are fused by means such as heat sealing, the hermeticity is significantly improved.

Therefore, the first problem (deterioration of battery performance due to the gap) is solved by the configuration according to the present invention.

In the present invention, it is preferable to provide a resin layer on both the container body and the lid. In particular, it is preferable to provide a resin layer on both the container body and the lid on the inner surface side of the container. This is because the provision of the resin layers on both sides enhances the hermeticity when combined. However, even when the resin layer is provided only on the container body side, for example, the sealing performance is improved as compared with the case where the resin layer is not provided.

The provision of the resin layer facilitates the sealing operation when the lid is fitted to the container body and the lid is closed, so that the assembly of the battery is facilitated and the second problem is also solved. You.

The present invention is directed to a battery container that houses a power generating element. Therefore, it is not sufficient to simply provide the resin layer on the inner surface side of the container body. This is because if the resin layer is provided on the entire inner surface of the container body, electrical connection with the power generating element cannot be established.

Therefore, in the present invention, a part of the resin layer is omitted, and the metal surface of the battery container is exposed to the inside of the battery container at the part where the resin layer is omitted. The battery container (metal portion) and the power generating element were electrically connected at the exposed portion.

As a result, for the first time, the function as a battery is exhibited, and the first and second problems are also solved.

In the present invention, a resin layer is provided on at least one surface of the metal material constituting the battery container. The material of the resin layer is not limited to a natural resin or a synthetic resin, but a material having heat sealability is preferable. Examples thereof include olefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, polyamide resins, vinyl chloride resins, styrene resins, and acrylic resins.

When the container body and the lid are made of an aluminum alloy (particularly, an Al alloy containing Mg), and the joining between the container body and the lid is to be performed by welding, the welding temperature is 600.
Since the temperature is not lower than ° C, minute cracks may be generated if the cooling is not performed slowly after welding. For this reason, when the battery container is made of an aluminum alloy, there are many restrictions.

However, according to the present invention, the container body and the lid can be joined without employing welding means. Heat sealing can be performed at 300 ° C. or less. Therefore, restrictions on the use of the aluminum alloy for the container body and the lid of the battery container are reduced, and the use of the aluminum alloy is facilitated.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Battery (Secondary Battery) According to the Present Invention
Is a battery including a power generation element and a battery container in which the power generation element is stored, wherein the battery container is formed using a metal material, and a resin layer is formed on an inner surface of the metal battery container. Is provided, a part of the resin layer is omitted, a metal surface of the battery container is exposed inside the battery container in the portion, and the exposed portion is electrically connected to the power generating element ( The battery case and the power generation element are electrically connected). Alternatively, a battery including a power generation element and a battery container containing the power generation element, wherein the battery container includes a container body and a lid, and the container body is configured using a metal material. A resin layer is provided on the inner surface of the metal container main body, and a part of the resin layer is omitted, and the metal surface of the container main body is exposed inside the battery container in the portion, The exposed portion is electrically connected to the power generating element (the container body and the power generating element are electrically connected). Alternatively, a battery including a power generation element and a battery container housing the power generation element, wherein the battery container includes a container main body and a lid, and the container main body and the lid are configured using a metal material. A resin layer is provided on the inner surface of the metal container main body, and a part of the resin layer is omitted, and the metal surface of the container main body is exposed inside the battery container in this part. And the exposed portion is electrically connected to the power generation element (the container body and the power generation element are electrically connected).
Further, a resin layer is provided on at least one surface of the lid, and when a battery container is configured by combining the container body and the lid, a resin layer provided on the lid and a resin layer provided on the container body are provided. Are polymerized. Alternatively, a battery including a power generation element and a battery container housing the power generation element, wherein the battery container includes a container body and a lid, and the container body and the lid are configured using a metal material. A resin layer is provided on the inner surface of the metal container main body, and a part of the resin layer is omitted, and the metal surface of the container main body is exposed inside the battery container in this part. The exposed portion is electrically connected to the power generating element (the container body and the power generating element are electrically connected), and a resin layer is provided on at least one surface of the lid, When a battery container is configured by combining a container body and a lid, a resin layer provided on the lid and a resin layer provided on the container body are fused. Note that the resin layer may be provided not only on the inner surface side of the container (container main body) but also on the outer surface side. Of course, if it is also provided on the outer surface side, the resin layer is removed from the electrically connected portion.

The battery (rechargeable battery) container according to the present invention is a container for a battery containing a power generating element, wherein the battery container is made of a metal material, and an inner surface of the metal battery container. Is provided with a resin layer, and a part of the resin layer is omitted, and the metal surface of the battery container is exposed to the inside of the battery container in this portion. Alternatively, it is a battery container for storing a power generating element, wherein the battery container includes a container main body and a lid, and the container main body is configured using a metal material, and is provided on an inner surface of the metal container main body. Is provided with a resin layer, and a part of the resin layer is omitted, and the metal surface of the container body is exposed to the inside of the container in this portion. Note that the resin layer may be provided not only on the inner surface side of the container (container main body) but also on the outer surface side. Of course, if it is also provided on the outer surface side, the resin layer is removed from the electrically connected portion. Also, a resin layer may be provided on the lid.

The material of the container of the battery (secondary battery) according to the present invention is the material of the container of the battery that houses the power generating element, wherein the material is made of a metal material, and at least one surface of the metal material is used. Is provided with a resin layer, a part of the resin layer is omitted, and a metal surface is exposed at the part.

The method for producing a battery (rechargeable battery) container according to the present invention is a method for producing a battery container for accommodating a power generating element, comprising: attaching a resin film to at least one surface of a metal plate; A step of removing a part of the resin film, and a step of forming a composite plate of the resin film and the metal plate into a predetermined shape. Either the step of removing a part of the resin film so that the metal surface is exposed or the step of forming a composite plate of the resin film and the metal plate into a predetermined shape may be performed first. That is, after the step of removing a part of the resin film so that the metal surface is exposed, even if a step of forming a composite plate of the resin film and the metal plate into a predetermined shape is performed, or the resin film and the metal plate After the step of forming the composite plate into a predetermined shape, a step of removing a part of the resin film so that the metal surface is exposed may be performed. Alternatively, they may be performed simultaneously.

The metal material constituting the battery container (container main body and / or lid) in the present invention may be an aluminum alloy, stainless steel, or the like. Aluminum alloys are preferred in terms of lightness and corrosion resistance. In particular, Mg
An Al alloy containing 4.0 wt% is also preferable because of its high mechanical strength.

The resin layer provided (laminated) on the surface of the metal material is made of a resin having a heat sealing property. For example, olefin resin, polyester resin, polyamide resin, vinyl chloride resin,
Styrene-based resins, acrylic-based resins, and the like can be given.

The power generating element of the secondary battery according to the present invention includes a negative electrode having a metal foil provided with a coating containing a negative electrode active material and a binder, and a coating having a metal foil containing a positive electrode active material and a binder. And a positive electrode provided on the surface thereof is spirally wound with a separator interposed therebetween. In particular, a negative electrode provided with a coating containing a negative electrode active material and a binder on the surface of the metal foil, and a positive electrode provided with a coating containing a positive electrode active material and a binder on the surface of the metal foil, a separator, Is a cylindrical, non-aqueous electrolyte type secondary battery having an electrode structure wound in a spiral shape with the electrode interposed therebetween. Various materials such as copper, nickel, stainless steel, and aluminum can be used as a material for forming the metal foil. Copper or the like is mainly used as the negative electrode current collector, while aluminum or aluminum alloy is mainly used as the positive electrode current collector.

Then, a positive electrode is formed by providing a coating film containing a positive electrode active material and a binder on a metal foil such as an aluminum foil. Any positive electrode active material may be used as long as it can dope and dedope lithium ions. For example, Lix Coy Mz O2 (M is at least one selected from Al, In, and Sn, and x, y, and z are 0 <x ≦
1.1, 0.5 <a number satisfying y ≦ 1, z ≦ 0.1), L
ix CoO2 (0 <x≤1), Lix Coy Niz O2
(X, y, z are positive numbers satisfying 0 <x ≦ 1, y + z = 1), Lix MnO2 (0 <x ≦ 1), Lix Mn2O
4 (0 <x ≦ 1), LiCox Mn2-x O4 (0 <x ≦
0.5), Lix Cr3 O8 (0 <x ≦ 1), LiCr
O2, Lix V2 O5 (0 <x≤1), Lix V6 O13
(0 <x ≦ 1), Li1 + x V3 O8 (0 <x ≦ 1), L
ix MoO3 (0 <x≤1), Lix MoS2 (0 <x
≦ 1), Lix Ti2 O4 (0 <x ≦ 1), Lix Ti
2 S2 (0 <x ≦ 1). Preferred are lithium cobalt oxide and lithium manganese oxide.
Particularly preferred is lithium cobalt oxide.

Examples of the binder include polysaccharides such as starch, polyvinyl alcohol, carboxymethylcellulose, hydroxypropylcellulose, regenerated cellulose, diacetylcellulose, polyvinyl chloride, polyvinylpyrrolidone, tetrafluoroethylene, polyvinylidene fluoride,
One or a mixture of two or more selected from thermoplastic resins such as polyethylene, polypropylene, styrene-butadiene rubber, fluororubber, and polyethylene oxide, and polymers having rubber elasticity are used.

Then, a paint containing 0.1 to 20 parts by weight of a binder with respect to 100 parts by weight of the active material is coated with a paint having a thickness of 15 to 20 parts.
Apply to μm aluminum foil. The coating thickness (thickness after drying) is 30 to 300 μm per side, particularly 70 to 1 μm.
30 μm.

In the coating film, if necessary, graphite such as natural graphite or synthetic graphite, carbon black, acetylene black, carbon fiber, metal powder, metal fiber, polyphenylene derivative, or other conductive polymer may be used. It contains a conductive agent, an olefin-based polymer such as polypropylene and polyethylene, or a filler such as glass fiber.

A negative electrode is formed in the same manner as described above or by a known method.

As the separator, for example, one kind of a microporous film of a polyolefin such as polyethylene or polypropylene, or two or more kinds of laminated films can be used. Also, polyolefin, polyester, polyamide,
A nonwoven fabric such as cellulose can be used alone or in combination with the microporous membrane.

Then, a negative electrode, a separator, a positive electrode, and a separator are laminated in this order, and the layers are spirally wound. The spirally wound body is housed in a battery container body, and in order to collect the negative electrode, Attach one end of the negative electrode lead to the negative electrode, connect the other end to the battery container body, and collect the positive electrode current.
One end of the positive electrode lead was attached to the positive electrode, the other end was connected to the battery lid, and a non-aqueous electrolyte solution in which a lithium salt was dissolved in an organic solvent was injected into the battery container body to produce a lithium ion secondary battery. .

As a solvent constituting the electrolytic solution, an organic solvent such as propylene carbonate, ethylene carbonate, butylene carbonate, diethyl carbonate, tetrahydrofuran, dimethyl sulfoxide, and acetonitrile, particularly an aprotic solvent is used. As the solute, a lithium salt is used. As lithium salts,
For example, LiClO4, LiAsF6, LiBF4, Li
PF6, LiCF3 SO3, LiCH3 SO3, LiC
One, two or more selected from the group of 1, LiBr, LiI and the like are used.

In addition to the above-mentioned electrolyte, a solid electrolyte can be used. The solid electrolyte includes an inorganic solid electrolyte and an organic solid electrolyte. You may use together an inorganic solid electrolyte and an organic solid electrolyte. Examples of the inorganic solid electrolyte include oxides, sulfides, nitrides, and halides of lithium. Examples of the organic solid electrolyte include a polyethylene oxide derivative, a polymer containing a polyethylene oxide derivative, a polypropylene oxide derivative, and a polymer containing a polypropylene oxide derivative.

Hereinafter, a more specific description will be given.

FIGS. 1 to 5 show an embodiment of the secondary battery according to the present invention. FIG. 1 is a schematic sectional view of the secondary battery, and FIGS. .

In each figure, 1 is a negative electrode, 2 is a positive electrode, and 3 is a separator. These form a power generating element.
The details of the negative electrode 1, the positive electrode 2, and the separator 3 are as described above. Then, the negative electrode 1, the separator 3, the positive electrode 2, and the separator 3 are stacked in this order, and are spirally wound, and the spirally wound body is housed in the battery container body 4. In addition, a non-aqueous electrolyte obtained by dissolving a lithium salt in an organic solvent is injected into the battery container body 4.

Further, one end of the negative electrode lead is attached to the negative electrode 1 and the other end is connected to the battery container main body 4 to collect the current of the negative electrode.
It is connected to the. One end of the positive electrode lead is attached to the positive electrode 2, and the other end is connected to the battery cover 5 in order to collect the current of the positive electrode.

The battery container body 4 contains Mg of 2.0 to 4.0.
% Of an Al-Mg alloy.
A 7 to 20 μm thick polyethylene terephthalate film 6 having a high resistance to an electrolyte is laminated on the inner surface thereof. In a predetermined portion (position where the other end of the negative electrode lead is connected to the battery container body 4) 7, the laminated polyethylene terephthalate film is removed. That is, at the location indicated by reference numeral 7, the metal surface of the battery case main body 4 is exposed on the inner surface side, so that the other end of the negative electrode lead can be connected to the battery case main body 4. That is, an electrical connection is made between the battery container body 4.

The battery container body 4 is composed of a peripheral side surface portion and a bottom surface portion. A predetermined portion from which the laminated polyethylene terephthalate film is removed (the other end of the negative electrode lead is connected to the battery container body 4). 7) may be located on either the peripheral side surface portion or the bottom surface portion. Further, although the description has been made assuming that the peripheral side surface portion and the bottom surface portion are integrated, the battery container main body 4 may be configured by combining the separately configured peripheral side surface portion and bottom surface portion. Even when the battery container body 4 is configured by combining the peripheral side surface portion and the bottom surface portion which are separate bodies, if the resin is laminated on the inner surface side,
A problematic gap cannot be formed at the joint between the peripheral side surface and the bottom surface. In addition, a gap that causes a problem cannot be formed even at the joint between the peripheral side surfaces. That is,
Since the adhesiveness is ensured by the resin interposed therebetween, a problematic gap cannot be formed at the joint.

A polyethylene terephthalate film is also laminated on the outer surface of the peripheral side surface and the outer surface of the bottom surface of the battery container body 4 as necessary.

The battery lid 5 is made of an Al-Mg alloy containing 2.0 to 4.0% of Mg. A 7 to 20 μm thick polyethylene terephthalate film 8 having a high resistance to the electrolyte is laminated on the inner surface (lower surface). At a predetermined portion (position where the other end of the positive electrode lead is welded to the battery cover 5) 9, the laminated polyethylene terephthalate film is removed. That is, at the location indicated by reference numeral 9, the metal surface of the battery lid 5 is exposed on the inner surface side, so that the other end of the positive electrode lead can be connected to the battery lid 5. That is, an electrical connection is made between the battery lid 5.

The power generation element is housed in the battery container body 4,
After the electrolyte is injected, the battery cover 5 is assembled,
The battery lid 5 is fixed to the battery container main body 4 by means such as caulking. At this time, the polyethylene terephthalate film 6 and the polyethylene terephthalate film 8 that are laminated to each other overlap at the joint between the battery container body 4 and the battery lid 5 as can be seen from the partially enlarged view of FIG. Then, since the overlapping portion is sealed by the heat sealing means, the polyethylene terephthalate film 6 and the polyethylene terephthalate film 8 are fused and the gap at the joint portion is eliminated.
That is, a sufficient hermeticity can be ensured.

Even if the battery case body 4 and the battery cover 5 are made of a metal material, an insulating resin, that is, polyethylene terephthalate films 6 and 8 are interposed between the battery case body 4 and the battery cover 5. Therefore, insulation between the two is sufficiently ensured, and there is no need to provide a gasket for ensuring insulation.

Next, a method for manufacturing the battery container body 4 and the battery lid 5 will be described.

First, as shown in FIG.
A plate material 10 made of an Al-Mg alloy having a thickness of m is prepared.

Next, as shown in FIG. 3, a polyethylene terephthalate film 11 having a predetermined thickness, for example, 7 to 20 μm, is bonded to the plate material 10.

Then, as shown in FIG. 4, a plate material 10 on which a polyethylene terephthalate film 11 is laminated.
Is pressed into a predetermined shape by a pressing means, and a weak cut is formed in the polyethylene terephthalate film 11 at a desired position during the pressing. Then, by hooking and peeling the inside of the cut, a metal plate of which the metal surface of the plate material 10 is exposed is obtained as shown in the sectional view of FIG.

Then, by molding this into a predetermined shape, a cylindrical or square battery container main body 4 and battery cover 5 as shown in FIG. 1 are obtained.

The electrical connection between the power generating element and the container becomes possible.・ It is difficult to form a gap in the battery container.・ Battery assembly is easy.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a secondary battery according to the present invention.

FIG. 2 is a schematic view (cross-sectional view) of a secondary battery container according to the present invention in a manufacturing stage.

FIG. 3 is a schematic view (cross-sectional view) of a secondary battery container according to the present invention in a manufacturing stage.

FIG. 4 is a schematic diagram (plan view) of a secondary battery container according to the present invention in a manufacturing stage.

FIG. 5 is a schematic view (cross-sectional view) of a secondary battery container according to the present invention in a manufacturing stage.

FIG. 6 is a schematic sectional view of a conventional secondary battery.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Negative electrode 2 Positive electrode 3 Separator 4 Battery container main body 5 Battery lid 6,8 Polyethylene terephthalate film 7,9 Polyethylene terephthalate film removal part 10 Board material 11 Polyethylene terephthalate film

Continued on the front page (72) Inventor Toshiaki Yamada 2-3-3 Shiba 2-chome, Minato-ku, Tokyo Mitsubishi Aluminum Corporation F-term (reference) 5H011 AA09 CC02 CC06 CC08 DD00 DD01 DD05 DD13 DD21 KK01 5H029 AJ14 AK03 AL08 AM02 AM03 AM07 BJ02 BJ14 CJ01 CJ05 CJ06 CJ11 DJ02 EJ01 EJ12 EJ14 HJ12

Claims (8)

[Claims] 1. A battery comprising: a power generating element; and a battery container in which the power generating element is stored, wherein the battery container is formed using a metal material, and an inner surface of the metal battery container is provided. Is provided with a resin layer, a part of the resin layer is omitted, a metal surface of the battery container is exposed to the inside of the battery container in the portion, and the exposed portion is electrically connected to the power generating element. A battery connected to the battery. 2. A battery comprising a power generating element and a battery container in which the power generating element is stored, wherein the battery container includes a container body and a lid, and the container body is formed using a metal material. A resin layer is provided on the inner surface of the metal container main body, and a part of the resin layer is omitted, and the metal surface of the container main body is exposed inside the battery container in this portion. And
A battery, wherein the exposed portion is electrically connected to the power generating element. 3. The lid is made of a metal material.
A resin layer is provided on at least one surface of the lid, and when a battery container is configured by combining the container body and the lid, a resin layer provided on the lid and a resin layer provided on the container body are provided. 3. The battery according to claim 2, wherein the battery is polymerized. 4. The battery according to claim 3, wherein the resin layer provided on the lid and the resin layer provided on the container body are fused. 5. A container for a battery containing a power generating element, wherein the battery container is made of a metal material, and a resin layer is provided on an inner surface of the metal battery container. A battery case, wherein a part of the resin layer is omitted, and a metal surface of the battery case is exposed inside the battery case in the portion. 6. A container for a battery containing a power generating element, wherein the battery container comprises a container body and a lid, wherein the container body is formed using a metal material, and wherein the metal container body is provided. A battery container, wherein a resin layer is provided on an inner surface of the battery container, and a part of the resin layer is omitted, and a metal surface of the container body is exposed to the inside of the container in the portion. 7. A material for a battery container that houses a power generating element, wherein the material is made of a metal material, and a resin layer is provided on at least one surface of the metal material. A material for a battery container, wherein a part is missing and a metal surface is exposed in the part. 8. A method for manufacturing a battery container accommodating a power generating element, comprising: attaching a resin film to at least one surface of a metal plate; and removing a part of the resin film so that the metal surface is exposed. Forming a composite plate of a resin film and a metal plate into a predetermined shape.