JPH10261429A - Battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict the generation of heating even in the case where an internal short circuit is generated, and to improve the capacity, and to improve the safety by providing a short circuit means for generating a short circuit before the generation of internal short circuit when a stress and an acceleration at a degree for generating deformation is applied to a battery. SOLUTION: In a short circuit means, a first conductive means is formed of a negative electrode conductor 14, which is positioned most outside of an electrode group 2, and a holder 13 is formed of a separator opposite to the inside of the negative electrode conductor 14, and a second conductive means is formed of a positive electrode conductor 12 opposite to the inside of the holder 13. Consequently, in the case where both the conductive means are made to contact with each other by some cause, a short circuit similar with an external short circuit is generated. The holder 13 has an insulator, and holds a space between the first and the second conductive means, which are formed of the positive and the negative electrode conductors 12, 14, so that they do not contact with each other, and as a holder, a paper, a ceramic and a compound thereof is used. The second conductive means is electrically connected to a positive electrode plate, a positive electrode collector, a positive electrode terminal or a positive electrode lead for connecting the positive electrode collector and the positive electrode terminal to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery.

[0002]

2. Description of the Related Art As electronic devices have rapidly become smaller and lighter, there has been an increasing demand for the development of a secondary battery that is small, lightweight, has a high energy density, and can be repeatedly charged and discharged. . In addition, due to environmental problems such as air pollution and an increase in carbon dioxide, the early commercialization of electric vehicles is desired, and the development of an excellent secondary battery having features such as high efficiency, high output, high energy density, and light weight. Is required.

As a secondary battery satisfying these requirements, a secondary battery using a non-aqueous electrolyte has been put to practical use. This battery has several times the energy density of a battery using a conventional aqueous electrolyte solution. For example, a non-aqueous electrolyte secondary battery uses a cobalt composite oxide, nickel composite oxide, or spinel-type lithium manganese oxide for the positive electrode and a long-life lithium ion occluding and releasing carbon material for the negative electrode. 4 V class non-aqueous electrolyte secondary batteries have been put to practical use.

[0004]

In this non-aqueous electrolyte secondary battery, a high-capacity amorphous carbon or / and
High-capacity non-aqueous electrolyte secondary batteries using oxides and the like have been developed, and the technology for miniaturization and high capacity has been rapidly developed.

[0005] As described above, the prevention of overcharge and overdischarge, the prevention of internal short circuit, and the like have become major issues with the miniaturization and high capacity, that is, the dramatic increase in volume energy density. As a measure to prevent overcharge, a method of controlling a charging voltage by a charger and a measure to prevent an overdischarge by controlling a cutoff voltage at the time of discharge have become mainstream.

Also, in preparation for a failure of the control of the charger or the like or a large current generated due to an internal short circuit, the battery is provided with a safety valve and a current interrupting means which are opened when a predetermined battery internal pressure is reached. .

However, even if these countermeasures are taken, heat is generated due to a large current at the time of an internal short circuit, and there is no fundamental solution at present. In addition, such a problem is not limited to the non-aqueous electrolyte secondary battery, but is also a problem common to nickel cadmium batteries, metal hydride batteries, and the like.

Accordingly, it is an object of the present invention to provide a battery which can be effectively suppressed so as not to generate heat even if an internal short circuit occurs.

[0009]

A battery according to the present invention has a first conductive means comprising a conductor or having a conductor electrically connected to a negative electrode in which an electrode group is housed in a battery case. A second conductive means made of or having a conductor electrically connected to the positive electrode, and an insulating property in which the first conductive means and the second conductive means maintain an electrically non-contact state. And a short-circuit means including at least a holding means.

[0010] In the battery according to the second aspect of the invention, the portion of the positive electrode to which the second conductive means is electrically connected includes a positive electrode plate, a positive electrode current collector, a positive electrode terminal, or a positive electrode current collector and a positive electrode terminal. A positive electrode lead to be connected, wherein the negative electrode part to which the first conductive means is electrically connected is a negative electrode plate, a negative electrode current collector, a negative electrode terminal, or a negative electrode lead connecting the negative electrode current collector and the negative electrode terminal; It is characterized by being.

A battery according to a third aspect of the present invention is characterized in that the short-circuit means is formed in a battery case.

A battery according to a fourth aspect of the present invention is characterized in that the short-circuit means is provided outside the battery case.

The battery according to a fifth aspect of the present invention is a battery case in which the first conductive means also serves as a negative electrode terminal, and the positive and negative electrodes disposed on the outermost periphery of the electrode group around which the second conductive means are wound. It is characterized by being a metal foil film that is electrically connected.

A battery according to a sixth aspect of the present invention is a battery case in which the first conductive means also serves as a negative electrode terminal, and a positive electrode plate disposed on the outermost periphery of the electrode group around which the second conductive means is wound. It is a current collector.

In a battery according to a seventh aspect of the present invention, a battery case also serving as a negative electrode terminal is a first conductive means, and a battery case is disposed opposite to the outer surface of the negative electrode case and electrically connected to the positive electrode terminal. Alternatively, a conductor having a conductive path is the second conductive means.

The battery according to an eighth aspect of the present invention is characterized in that the short-circuit means is responsive to a stress that causes the battery to deform.

A battery according to a ninth aspect is characterized in that the holder is an elastic body.

A battery according to a tenth aspect is characterized in that the holder is plate-shaped and has a through hole.

According to an eleventh aspect of the present invention, there is provided a battery comprising a positive electrode having a positive electrode mixture layer having a lithium-containing metal oxide capable of inserting and extracting lithium ions, and a negative electrode having a host material capable of inserting and extracting lithium ions. A non-aqueous electrolyte secondary battery including a negative electrode on which an agent layer is formed.

Further, the present invention is characterized in that these are combined.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION A battery, here a non-aqueous electrolyte secondary battery in particular, will be described. When an external stress or acceleration is applied to deform a battery, an internal short circuit occurs.
The battery may generate heat and, in the worst case, may catch fire. The present inventors have investigated the cause in detail, and found that an excessive short-circuit current through the lithium-containing metal oxide of the positive electrode (hereinafter, referred to as a positive electrode host material) itself that occludes and releases lithium ions at an internal short-circuit location. It was clarified that the biggest factor was that the cathode host material was heated by this, causing a very large exothermic decomposition reaction.

Therefore, the inventors of the present invention have determined that the stress and the acceleration required to deform the battery (the stress varies depending on the strength of the battery case, the battery, the battery pack container, and the like. Examples include crushing, cutting, penetration, bending, pulling, and dropping from a high place with a sharp tip (a nail, a skewer, or the like).)
The short-circuit means electrically connected to the negative electrode and the positive electrode, respectively, by providing short-circuit means for short-circuiting prior to the internal short-circuit, that is, prior to the internal short-circuit when the battery is applied to the battery from outside the battery. Is conducted, a large current at the time of the internal short circuit flows via the short-circuit means without passing through the positive electrode host material itself.

Therefore, a large instantaneous current at the time of internal short circuit can be dispersed and flown to the positive electrode host material.
It is possible to effectively suppress heat generation and the like due to an internal short circuit as in a conventional battery.

In the present invention, in the case of a non-aqueous electrolyte lithium ion secondary battery, the host material of the negative electrode may be any material as long as it can occlude and release lithium ions, for example, graphite, coke,
Carbon, amorphous carbon, SnO, SnO ₂ ,
Sn _1-x M _x O (M = Hg, P, B, Si, Ge or S
b, where 0 ≦ X <1), Sn _1-x M _x O ₂ (M = Hg,
P, B, Si, Ge or Sb, provided that 0 ≦ X <1), S
n ₃ O ₂ (OH) ₂ , Sn _3-x M _× O ₂ (OH) ₂ (M = M
g, P, B, Si, Ge, Sb, As or Mn, where 0 ≦ X <3), LiSiO ₂ , SiO _2, SiO, SiO _{2 -x}
(0 ≦ X <1), Si _1−x M _x O (M = Hg, P, B, S
i, Ge or Sb, where 0 ≦ X <1), Si _1-x M _x O ₂
(M = Hg, P, B, Si, Ge or Sb, provided that 0 ≦
X <1), Si _1−x M _x O _2−y (M = Hg, P, B, Si,
Ge or Sb, provided that 0 ≦ X <1, 0 ≦ y <1) or L
One or more selected from iSnO ₂ can be exemplified. As described above, even when a battery having a large capacity of the negative electrode is used and the battery has a high capacity, the safety can be improved by applying the present invention.

In the non-aqueous electrolyte secondary battery according to the present invention, a combination of a positive electrode, a negative electrode and a separator with a non-aqueous electrolyte, or an organic or inorganic solid electrolyte as a positive electrode, a negative electrode and a separator is used. It may be a combination with a water electrolyte. Any known inorganic solid powder and non-aqueous electrolytic solution determined by an organic or inorganic solid electrolyte or organic binder as a separator or a separator can be used.

Hereinafter, the present invention will be described with reference to preferred embodiments. However, it is needless to say that the present invention is not limited thereto without departing from the spirit of the present invention.

[0027]

Embodiment 1 The present invention will be described below using an embodiment in which the short-circuit means according to the present invention is provided inside a battery.

A conventional positive electrode plate has a current collector made of an aluminum foil having a thickness of 20 μm, and a lithium-cobalt composite oxide held as a lithium-containing metal oxide for absorbing and releasing lithium ions. The positive electrode plate was prepared by mixing 6 parts by weight of polyvinylidene fluoride as a binder and 3 parts by weight of acetylene black as a conductive agent with an active material 91.
The mixture was mixed with parts by weight, NMP (N-methylpyrrolidone) as a solvent was appropriately added to prepare a paste, and then applied to both surfaces of the current collector material and dried. And the thickness 18
Pressed to 0μm, leaving a rectangular lead 24m wide
m.

In a conventional negative electrode plate, 92 parts by weight of graphite as a host substance and 8 parts by weight of polyvinylidene fluoride as a binder are mixed on both sides of a current collector made of a copper foil having a thickness of 10 μm, and a solvent is mixed. A paste prepared by appropriately adding NMP was applied to both sides and dried. And
It was manufactured by rolling to a thickness of 220 μm and cutting to a width of 26 mm leaving a rectangular lead.

The separator has a thickness of 25 μm and a width of 28 mm.
Is a microporous polyethylene membrane.

The electrolyte was ethylene carbonate: diethyl carbonate = 1: 1 containing 1 mol / l of LiPF _6.
The mixed solution (volume ratio) was used.

FIG. 1 is an explanatory sectional view of a non-aqueous electrolyte secondary battery according to the present invention.

In the figure, 1 is a non-aqueous electrolyte battery, 2 is an electrode group, 3 is a positive electrode plate, 4 is a negative electrode plate, 5 is a separator, and 6 is a battery case. The configuration of the non-aqueous electrolyte battery 1 is a prismatic battery in which a spiral electrode group 2 composed of a positive electrode plate 3, a negative electrode plate 4, and a separator 5 and an electrolyte are accommodated in a battery case 6.

The battery case 6 has a thickness of 0.3 mm and an inner size of 3 mm.
The surface of an iron main body of 0 × 40 × 8.0 mm is plated with nickel having a thickness of 5 μm, and a hole (not shown) for injecting an electrolyte is provided at an upper side portion.

7 is a case cover, 8 is a safety valve, 10 is a positive electrode terminal, and 11 is a positive electrode lead.

Here, the positive electrode plate and the negative electrode plate located at the outermost periphery of the electrode group 2 are portions where the mixture of the host substance is not applied (that is, only the current collector). An electrode group for the next battery was manufactured, and a copper foil and an aluminum foil of a current collector were sequentially arranged from outside to face each other with a separator interposed therebetween. (Twelve positive electrode current collectors without the positive electrode mixture layer and one negative electrode current collector without the negative electrode mixture layer
4 is assumed. In addition, the positive electrode plate 3 is connected to the terminal 10 of the case lid 7 provided with the safety valve 8 and the positive electrode terminal 10 via the positive electrode lead 11. The negative electrode plate 4 is connected to the inner wall of the battery case 6 by contact. The battery is sealed by laser welding the lid 7 to the case 6.

FIG. 2 is an enlarged sectional explanatory view of an end portion of the nonaqueous electrolyte secondary battery according to the present invention.

In the short-circuit means according to the present invention, the negative electrode current collector 14 located at the outermost periphery of the electrode group 2 constitutes the first conductive means, and the separator 13 facing the inside of the current collector 14 is the holder. And the positive electrode current collector 12 facing the inside of the separator 13 constitutes the second conductive means. Therefore,
Here, the current collector 14, the current collector 12, and the holder 13 constitute short-circuit means. Therefore, if they come into contact for any reason, a short circuit similar to an external short circuit occurs.

The holding body 13 has an insulating property,
In addition, any material may be used as long as it can maintain an interval so that the conductive means 12 and 14 do not come into contact with each other. Examples other than the above include paper, ceramics, and composites thereof, and it goes without saying that various shapes can be applied. No.

A conventional battery having no short-circuit means is designated by A (however, the difference from the battery of the present invention is that the current collectors of the positive electrode plate and the negative electrode plate, which are the outermost periphery of the electrode group 2, are also each made of active material or The battery according to the present invention is designated as B). Electrode is vacuum-injected into each electrode and separator so that the electrolyte is sufficiently wetted and free electrolyte does not exist outside the electrode group. The holes were sealed, and five batteries (A, B) each having a design capacity of 900 mAh were produced, a total of ten batteries. However, the amount of the electrolyte was 4 ml.

[Tests and Results] In each of these batteries A and B, a current of 0.5 C was applied for 3 hours.
The battery was charged at a constant current and a constant voltage up to 1 V to obtain a fully charged state.

Using 20 of these batteries, an iron nail having a diameter of 2.5 mm was penetrated from the side of the battery case, and the appearance was observed. In all of the batteries of the present invention, heat generation of 120 ° C. or less was recognized. No other abnormalities were observed. However, in the conventional battery, smoke was observed at the same time when the battery temperature rose to 200 ° C. or higher.

[0043]

Embodiment 2 Hereinafter, the present invention will be described using another embodiment in which the short-circuit means according to the present invention is provided outside the battery.

A conventional battery was manufactured in the same manner as in Example 1.

FIG. 3 is an explanatory sectional view of a nonaqueous electrolyte secondary battery according to the present invention according to this embodiment.

In the figure, 1 is a non-aqueous electrolyte secondary battery, 2
Is an electrode group, 3 is a negative electrode plate, 4 is a positive electrode plate, 5 is a separator,
6 is a battery case. The configuration of the non-aqueous electrolyte secondary battery 1 is a prismatic battery in which a spiral electrode group 2 including a positive electrode plate 4, a negative electrode plate 3, and a separator 5 and an electrolyte are accommodated in a battery case 6.

The battery case 6 has a thickness of 0.3 mm and an inner size of 3 mm.
The surface of an iron main body of 0 × 40 × 8.0 mm is plated with nickel having a thickness of 5 μm, and a hole (not shown) for injecting an electrolyte is provided at an upper side portion.

7 is a case cover, 8 is a safety valve, 10 is a positive electrode terminal, 11 is a positive electrode lead, and 13 is a holder. However,
The active material was not applied to the current collector 12 of the positive electrode plate located at the outermost periphery of the electrode group 2.

The holding body 13 is a butyl rubber having a plate-shaped through hole here (here, the thickness is 0.4 mm), and here is particularly a lattice shape (the through hole has a side length of 3 m).
m, and the distance between the through holes was 2 mm. ) Is formed. Then, an epoxy-based adhesive (manufactured by Yuka Shell; Epico-
828, epomate was used as a curing agent and mixed. ).

Here, the holding body 13 is provided on the inner wall surface of the case 6 facing the electrode plate surface on which the mixture layer of the active material or the host material of the wound electrode group 2 is formed. 7), that is, on the inner wall 3 of the case 2.

As another example of the holding body 13, a plurality of convex bodies having a mountain-shaped cross section may be arranged.
It is not limited to these. ((A) of FIGS. 3 and 4)
And (B)) In addition to the rubber, the holding body may be an elastic body having insulating properties such as a resin plate. Needless to say, the electrolyte must have corrosion resistance.

Here, the inner wall surface 6 ′ of the battery case 6 is the first
, The current collector 12 represents the second conductive means. Therefore, here, the inner wall surface 6 ′, the current collector 12, and the holder 13 constitute a short-circuit means, and are configured in the battery case.

The positive electrode plate 4 includes a safety valve 8 and a positive electrode terminal 1.
0 is connected via a positive electrode lead 11 to a terminal 10 of a case lid 7 provided with a zero. The negative electrode plate 3 is connected to the inner wall of the battery case 6 via a negative electrode lead. The battery is sealed by laser welding the lid 7 to the case 6.

A is a conventional battery having no short-circuit means,
With the battery according to the present invention having the above-mentioned structure as C, the electrodes were sufficiently wetted with the electrolyte and the electrolyte was sufficiently wetted, and the amount of free electrolyte not present outside the electrode group was vacuum-injected to seal the holes, and the design capacity was 9%.
Five batteries (A, C) of 00 mAh each were produced, a total of 10 batteries. However, the amount of the electrolyte was 4 ml.

[Tests and Results] In each of these batteries A and C, a current of 0.5 C was applied for 3 hours.
The battery was charged at a constant current and a constant voltage up to 1 V to obtain a fully charged state.

Using 10 of these batteries, an iron nail having a diameter of 2.5 mm was penetrated from the side of the battery case, and the appearance was observed. In all of the batteries of the present invention, heat generation of 120 ° C. or less was recognized. No other abnormalities were observed. However, in the conventional battery, smoke was observed at the same time when the battery temperature rose to 200 ° C. or higher.

In the present embodiment, the current collector of the positive electrode plate is used as the second conductive means. However, a metal foil film made of aluminum or an alloy thereof is provided on the outermost periphery of the electrode group so that the positive electrode is electrically connected to the current collector. To the second conductive means.

[0058]

Embodiment 3 Hereinafter, the present invention will be described using an embodiment in which the short-circuit means according to the present invention is provided outside the battery.

A conventional battery was manufactured in the same manner as in Example 1.

FIG. 5 is an explanatory sectional view of a battery pack containing a non-aqueous electrolyte battery according to another embodiment of the present invention.

In the figure, 1 is a non-aqueous electrolyte battery, 2 is an electrode group, 3 is a positive electrode plate, 4 is a negative electrode plate, 5 is a separator, 6 is a battery case, 7 is a case cover, 8 is a safety valve, 10 is a positive electrode. The terminal, 11 is a positive electrode lead, and 12 is a conductor (here, a metal, particularly an aluminum plate is used) formed in an L-shaped cross section so as to face the outer surface of the battery case. 13 is a holder.

Reference numeral 24 denotes a battery pack for storing batteries, 15 denotes a battery pack housing made of hard plastic, 16 denotes a sealing plate, and the battery pack housing and the like are equivalent to those widely used as products. . Further, the positive electrode plate and the negative electrode plate according to the present invention were manufactured as the same as those of the conventional battery.

The holder 13 is provided on the outer wall of the battery case here, and is formed by shaping inorganic solid particles (here, MgO) using a binder (polyvinylidene fluoride; PVdF). I have. Then, the NMP solution of polyimide is fixed to the outer surface of the case length side facing the metal conductor 12 using an adhesive.

Here, the shape of the holding body 13 is formed in a semicircular cross section, the diameter is 2.0 mm, the height is 0.5 mm, and the holding bodies 13 are arranged at intervals of 3 mm. Note that the arrangement shape, the number of arrangements, and the arrangement location may be appropriately determined from the size of the battery and the like, and the fixing method and the like are not limited thereto.

As the other shape of the holder 13, a spherical shape, a square shape in cross section, or an elliptical shape in cross section is exemplified.

The internal structure of the battery is the same as that of the conventional battery of Example 1, and the manufacturing method is also the same.

Here, the outer wall surface 6 ′ of the battery case 6 is the first conductive means, and the conductor 12 connected to the positive terminal is the second conductive means. Therefore, here, the inner wall surface 6 ', the metal conductor 12, and the holder 13 constitute a short-circuit means, and are constituted outside the battery case.

A conventional battery having no short-circuit means is denoted by A,
With the battery according to the present invention as D, the electrolyte was sufficiently wetted by the electrodes and the separator, and the hole was sealed by vacuum-injecting the amount of free electrolyte outside the electrode group to a design capacity of 900 mAh.
5 batteries (A, D) were prepared, each for a total of 10 batteries.
However, the amount of the electrolyte was 4 ml.

[Tests and Results] In each of these batteries A and D, a current of 0.5 C was applied for 3 hours.
The battery was charged at a constant current and a constant voltage up to 1 V to obtain a fully charged state.

Using 20 of these batteries, an iron nail having a diameter of 2.5 mm was penetrated from the side of the battery case, and the appearance was observed. In all of the batteries of the present invention, heat generation of 120 ° C. or less was recognized. No other abnormalities were observed. However, in the conventional battery, smoke was observed at the same time when the battery temperature rose to 200 ° C. or higher.

Similarly, when 20 pieces were each crushed with a round bar having a diameter of 25 mm until the thickness became half, all the batteries of the present invention generated heat of 120 ° C. or less. Not at all. However, in the conventional battery, smoke was observed at the same time when the battery temperature rose to 200 ° C. or higher.

In the above embodiment, the case where the lithium-cobalt composite oxide is used as the lithium-containing metal oxide of the positive electrode has been described. However, lithium-cobalt-based composite oxide, lithium nickel or lithium-nickel-based composite oxide, and titanium disulfide are used. It goes without saying that a manganese-based material such as spinel-type lithium manganese oxide or vanadium pentoxide and molybdenum trioxide can be used.

In addition, although the battery according to the above embodiment is rectangular, any shape such as a cylindrical shape, a coin shape or a paper shape may be used.

It is needless to say that the present invention is applicable regardless of the type of the battery.

Further, the organic solvent is not fundamentally limited. The same effects as those of the present invention can be obtained as long as they are conventionally used for lithium batteries. For example, as a solvent, a low-viscosity solvent such as 1,2-dimethoxyethane, dimethyl carbonate, ethyl methyl carbonate, diethyl carbonate, or methyl formate is mixed with a high dielectric constant solvent such as propylene carbonate, ethylene carbonate, γ-butyrolactone, or sulfolane. What was done can be used. In addition, the present invention can be applied to a lithium secondary battery using lithium metal or an alloy thereof having the highest energy density.

The adhesive used in this embodiment is not limited, but any adhesive can be used as long as it has an electrolytic solution resistance and can fix the holder. The fixing method is also limited to the adhesive. Nor.

[0077]

According to the present invention, since a large instantaneous current at the time of an internal short circuit can be dispersed and flown to the positive electrode host material, heat generation and the like due to the internal short circuit of the conventional battery can be effectively suppressed. Can be.

Therefore, it is possible to provide a battery such as a non-aqueous electrolyte secondary battery which can not only increase the capacity but also improve the safety.

Accordingly, the industrial value of the present invention is extremely high.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view of a non-aqueous electrolyte secondary battery of the present invention according to Example 1;

FIG. 2 is an enlarged cross-sectional end view of the nonaqueous electrolyte secondary battery of the present invention according to the first embodiment.

FIG. 3 is an explanatory sectional view of a non-aqueous electrolyte secondary battery of the present invention according to Example 2.

FIG. 4 is an explanatory view showing one embodiment of a holder for short-circuit means according to the present invention.

FIG. 5 is an explanatory sectional view of a battery pack containing a non-aqueous electrolyte secondary battery according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nonaqueous electrolyte secondary liquid battery 2 Electrode group 5 Separator 6 Case 7 Lid 8 Safety valve 10 Positive electrode terminal 11 Positive electrode lead 12 Second conductor 13 Holder 14 First conductor

Claims (11)

[Claims] 1. A battery in which an electrode group is housed in a battery case, wherein the first conductive means is made of or has a conductor electrically connected to the negative electrode, and is electrically connected to the positive electrode. A short circuit comprising at least a second conductive means made of or having a conductive body, and an insulating holding means for holding the first conductive means and the second conductive means in an electrically non-contact state. A battery provided with means. 2. A positive electrode portion electrically connecting the second conductive means is a positive electrode plate, a positive electrode current collector, a positive electrode terminal, or a positive electrode lead connecting the positive electrode current collector and the positive electrode terminal,
The negative portion electrode electrically connecting the first conductive means is a negative electrode plate, a negative electrode current collector, a negative electrode terminal, or a negative electrode lead connecting the negative electrode current collector and the negative electrode terminal. Item 7. The battery according to Item 1. 3. The battery according to claim 1, wherein said short-circuit means is formed in a battery case. 4. The battery according to claim 1, wherein the short-circuit means is provided outside the battery case. 5. A metal foil, wherein the first conductive means is a battery case also serving as a negative electrode terminal, and the second conductive means is electrically connected to a positive electrode disposed on the outermost periphery of the wound electrode group. 5. The battery according to claim 1, wherein the battery is a membrane. 6. The first conductive means is a battery case also serving as a negative electrode terminal, and the second conductive means is a current collector of a positive electrode plate disposed on the outermost periphery of the wound electrode group. Claims 1 and 2,
The battery according to 3 or 4. 7. A battery case, which also serves as a negative electrode terminal, is a first conductive means, wherein a conductor or a conductor having a conductive path which is disposed opposite to the outer surface of the negative electrode case and is electrically connected to the positive electrode terminal is provided. Second
The battery according to claim 1, 2, 3, or 4, wherein the battery is a conductive means. 8. The method according to claim 1, wherein the short-circuit means is responsive to a stress that causes the battery to deform.
The battery according to 3, 4, 5, 6, or 7. 9. The battery according to claim 1, wherein the holder is an elastic body. 10. The method according to claim 1, wherein the holding body is plate-shaped and has a through hole.
The battery according to 5, 6, 7 or 8. 11. A positive electrode having a positive electrode mixture layer having a lithium-containing metal oxide capable of inserting and extracting lithium ions, and a negative electrode having a negative electrode mixture layer having a host material capable of inserting and extracting lithium ions. A non-aqueous electrolyte secondary battery comprising:
The battery according to 4, 5, 6, 7, 8, 9, or 10.