JP2002313431A - Nonaqueous electrolyte secondary battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To speedily and correctly detect a temperature rise or a pressure inside a power generating body without applying a burden on a positive electrode or a negative electrode. SOLUTION: A secondary battery is provided with the power generating body 10 composed of a positive electrode 11 and a negative electrode 14 laminated or wound through a separator 17, either one or both of a temperature sensor 21 and a pressure sensor 22, and a package 31 to seal the power generating body 10. Either one or both of a temperature detecting part 21a and a pressure detecting part are provided in the negative electrode 11, in the negative electrode 14, or between the positive electrode 11 and the negative electrode 14 that are laminated or wound in the power generating body 10 as they are coated with coating material 23. The coating material 23 is formed in the form of a flat plate or flat rectangular rod having a roughly similar width or length to a width of the positive electrode 11 and the negative electrode 14. A width or length of the coating material 23 is set to correspond to the width of the positive electrode 11 or the negative electrode 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-aqueous electrolyte secondary battery provided with a sensor.

[0002]

2. Description of the Related Art Conventionally, lead storage batteries and alkaline storage batteries have been used as secondary batteries used in electric vehicles and stationary power supply devices. However, in recent years, a non-aqueous electrolyte secondary battery such as a lithium battery, which can be reduced in size and weight, has been increased in capacity, and a battery capable of charging and discharging has been used. Such a non-aqueous electrolyte secondary battery is made by encapsulating a power generator formed by winding or laminating a positive electrode and a negative electrode filled with a positive electrode and a negative electrode active material via a separator, The capacity can be increased by connecting a plurality of power generators in series or in parallel.

On the other hand, such a non-aqueous electrolyte secondary battery has a relatively high calorific value during discharging or charging, and the electrolyte becomes unstable when the internal temperature of the battery exceeds 70 ° C. due to the large heat generation. The service life of the secondary battery is shortened, and the performance is extremely deteriorated. Further, if the high temperature exceeding 70 ° C. continues for a long time, the battery itself may be damaged. For this purpose, a temperature sensor for detecting the temperature of the power generator is provided on the secondary battery, and a cooling mechanism for cooling the secondary battery when the temperature sensor detects a temperature rise above a predetermined value, and a charge / discharge when the temperature rises. A separate protection circuit for stopping the operation is provided so that appropriate measures can be taken.

In a secondary battery having a metal package, a pressure sensor is provided instead of a temperature sensor.
Detects the pressure inside the package that has risen with the temperature rise at the time of overcharging, and stops charging by opening a safety valve provided on the package when the pressure sensor detects a pressure rise exceeding a predetermined value. Such is known. Further, depending on the type of the secondary battery, both a temperature sensor and a pressure sensor are provided to detect the pressure inside the package that has risen with the rise in the temperature of the power generator during overcharge, and the charging is stopped based on the detected output. Some of them are also known.

[0005]

However, even if the temperature sensor and the pressure sensor as described above are provided in the secondary battery, if the sensors are mounted on a package of the secondary battery, the power generator There is a problem that an accurate temperature rise or pressure cannot be detected in the above. In order to solve this problem, it has been proposed to provide a temperature sensor or a pressure sensor directly on the outer surface of the power generator via an adhesive film (JP-A-11-162527). However, providing a temperature sensor or a pressure sensor via a film requires a new part called the film, and has a problem that the number of parts is increased and the management burden is increased. Also, when the temperature or pressure of the power generator increases at a relatively high speed, even if the temperature or pressure on the outer surface of the power generator is detected,
The detected value does not indicate the temperature or pressure inside the power generator, and there is a problem that appropriate processing accompanying the rise in temperature or pressure inside the power generator is delayed, thereby deteriorating the performance of the power generator.

On the other hand, the temperature sensor and the pressure sensor are connected to a lead wire for outputting a detection value in the temperature detection unit and the pressure detection unit, and the power generator is formed by laminating or winding a positive electrode and a negative electrode. Therefore, if the temperature sensor and the pressure sensor are directly inserted into the power generator, there is a problem that a lead wire of the sensor is connected to the positive electrode or the negative electrode to cause a short circuit. In addition, the non-uniform unevenness due to the presence of the temperature sensor and the pressure sensor makes it difficult to stack or wind the positive electrode and the negative electrode, and the stacked or wound positive electrode despite the presence of uneven unevenness. There is also a problem that stress is locally concentrated on the electrode or the negative electrode, and the power generator is damaged due to the stress. An object of the present invention is to provide a nonaqueous electrolyte secondary battery capable of quickly and accurately detecting a temperature rise value or a pressure inside a power generator without imposing a load on a positive electrode or a negative electrode.

[0007]

The invention according to claim 1 is
As shown in FIG. 1, the positive electrode 1
1 and a negative electrode 14, which are laminated or wound, and a temperature sensor 21 which is configured by covering a temperature detecting portion 21 a with a coating material 23 and detects the temperature of the power generator 10.
And a package 31 for hermetically sealing the power generator 10 together with the temperature sensor 21. The characteristic configuration is such that the temperature detecting portion 21 a is covered with the coating material 23 between the stacked or wound positive electrodes 11 or between the negative electrodes 14 or between the positive electrode 11 and the negative electrode 14 of the power generator 10. It is provided in a state. In the non-aqueous electrolyte secondary battery according to claim 1, the temperature sensor 21 is provided inside the power generator 10, so that the temperature rise value detected by the sensor 21 is an accurate value inside the power generator 10, The sensor 21 is the power generator 1
The temperature rise value inside 0 is accurately detected.

According to the second aspect of the present invention, there is provided a power generator 10 formed by laminating or winding a positive electrode 11 and a negative electrode 14 with a separator 17 interposed therebetween, a package 31 for hermetically sealing the power generator 10, This is an improvement of the non-aqueous electrolyte secondary battery including the pressure sensor 22 configured to cover the portion 22a with the coating material 23 and detecting the pressure inside the package 31. The characteristic configuration is such that the pressure detecting portion 22 a is covered with the coating material 23 between the stacked or wound positive electrodes 11 or between the negative electrodes 14 or between the positive electrode 11 and the negative electrode 14 of the power generator 10. It is provided in a state. In the non-aqueous electrolyte secondary battery according to claim 2, since the pressure sensor 22 is provided inside the power generator 10, the pressure value detected by the sensor 22 is an accurate value inside the power generator 10, and The sensor 22 accurately detects the pressure value inside the power generator 10.

According to a third aspect of the present invention, the power generator 10 is configured by laminating or winding the positive electrode 11 and the negative electrode 14 with the separator 17 interposed therebetween, and the temperature detecting portion 21 a is coated with the coating material 23. A temperature sensor 21 configured to detect the temperature of the power generator 10, a package 31 that seals the power generator 10 together with the temperature sensor 21, and a pressure detector 22 a covered with a coating material 23. This is an improvement of the nonaqueous electrolyte secondary battery including the pressure sensor 22 for detecting. The characteristic configuration is that the temperature detecting section 21a and the pressure detecting section 22a are covered with a single covering material 23, and the temperature detecting section 21a and the pressure detecting section 22a are covered with the covering material 23. Alternatively, it is provided between the wound positive electrode 11 or the negative electrode 14 or between the positive electrode 11 and the negative electrode 14. In the nonaqueous electrolyte secondary battery according to the third aspect, since the temperature sensor 21 and the pressure sensor 22 are provided inside the power generator 10, the temperature rise value and the pressure value detected by the sensors 21 and 22 are determined by the power generator. The sensor 21 and 22 accurately detect the temperature rise value and the pressure value inside the power generator 10.

[0010] The invention according to claim 4 is the invention according to claims 1 to 3.
The invention according to any one of the above, wherein the coating material 23 is the positive electrode 1
1 and a flat or rectangular rod having a width or length substantially the same as the width direction of the negative electrode 14 so that the width or length of the coating material 23 is adjusted to the width of the positive electrode 11 or the negative electrode 14. Laminated or wound positive electrode 1 of power generator 10
1 is a nonaqueous electrolyte secondary battery in which a coating material 23 is provided between the negative electrodes 14 or between the positive electrodes 11 and the negative electrodes 14. In the nonaqueous electrolyte secondary battery according to the fourth aspect, even if the coating material 23 is provided and the positive electrode 11 and the negative electrode 14 are laminated or wound, the presence of the coating material 23 Uneven unevenness does not occur on the lamination surface or the winding surface, and the lamination or winding of the positive electrode 11 and the negative electrode 14 does not become difficult. Therefore, no local stress is generated in the laminated or wound positive electrode 11 or negative electrode 14 with the covering material 23 provided, and the damage of the power generator 10 due to the local stress is effectively prevented. To prevent.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIGS. 1 and 2,
The non-aqueous electrolyte secondary battery in this embodiment is a lithium ion polymer secondary battery 9, which is
The power generator 10 includes a temperature sensor 21 that detects the temperature of the power generator 10, a package 31 that seals the power generator 10 with the temperature sensor 21, and a pressure sensor 22 that detects the pressure inside the package 31. . The power generator 10 has a structure in which a separator 17 is interposed between a positive electrode 11 and a negative electrode 14, and the positive electrode 11 and the negative electrode 14 are laminated. The positive electrode 11 is a positive electrode current collector foil 12
The negative electrode 14 is obtained by applying a negative electrode active material 16 to the surface of a negative electrode current collector foil 15. The separator 17 is interposed between the positive electrode active material 13 formed on the positive electrode current collector foil 12 and the negative electrode active material 16 formed on the surface of the negative electrode current collector foil 15. In the power generator 10, a strip-shaped negative electrode current collector foil 15 is used in order to increase the discharge capacity, and the strip-shaped negative electrode current collector foil 15 is folded with a separator 17 on the surface of the negative electrode active material 16. Be folded. The negative electrode current collector foil 15 in this embodiment is a Cu foil, and the negative electrode active material 16 is a graphite-based active material.

In the power generator 10, a plurality of positive electrodes 11 each having an area corresponding to the folded area are sandwiched between separators 17 excluding the folds of the folded negative electrode 14. The separator 17 is also formed on the surface of the cathode active material 13 of the sandwiched cathode electrode 11. The cathode current collector foil 12 in this embodiment is an Al foil, and the cathode active material 13 is, for example, LiCoO _2. Is done. That is, the positive electrode 11 and the negative electrode 14 are laminated with the separator 17 interposed therebetween, and the lamination is performed by thermocompression bonding. Specifically, a plurality of positive electrodes 11 are arranged on the negative electrode 14 at a predetermined pitch corresponding to the interval between the folds, and the positive electrode 11 and the negative electrode 14 are thermocompression bonded with the separator 17 interposed therebetween. The arrangement of the plurality of positive electrodes 11 on the negative electrode 14 is as follows.
As shown in FIG. 2, one end 12 b of the plurality of positive electrode current collector foils 12 is connected to one end 15 of the strip-shaped negative electrode current collector foil 15.
b, the other end 1 of the strip-shaped negative electrode current collector foil 15
5a are arranged so as to protrude from the other end portions 12a of the plurality of positive electrode current collector foils 12, and the respective positive electrode electrodes 11 are arranged with a portion corresponding to the fold of the negative electrode electrode 14.

As shown in FIG. 4, the positive electrode 1
1 is stacked on the negative electrode 14 so that the positive electrode 11
This is performed by alternately bending the folds of the negative electrode 14 where no is arranged. When folded in this way, as shown in FIG. 1, a plurality of positive electrodes 11 each having an area corresponding to the folded area are provided between the separators 17 excluding the folds of the negative electrode 14 thus folded. Is pinched.
As shown in FIG. 2, one end 12 b of the plurality of positive electrode current collector foils 12 protrudes from one end 15 b of the band-shaped negative electrode current collector foil 15, and The other end 15 a is the other end 12 of the plurality of positive electrode current collector foils 12.
are stacked in a state of protruding from a.

On the other hand, the temperature sensor 21 has a temperature detecting section 21a.
Is coated with a coating material 23, and the pressure sensor 22 is configured such that a pressure detection unit 22a is coated with the coating material 23,
The temperature detecting section 21a and the pressure detecting section 22a are covered with a single covering material 23. As the temperature detecting unit 21a, an element whose electric characteristics change according to the temperature, for example, a thermistor element whose resistance decreases as the temperature increases can be used.
For the pressure detection unit 22a, a strain gauge or a semiconductor element having a different resistance depending on the pressure can be used. Temperature detector 21
The pressure sensor a and the pressure detection unit 22a are preferably thin in order to make the temperature sensor 21 and the pressure sensor 22 integrally formed by being covered with the covering material 23 thin.

As shown in FIG. 5, lead wires 2 are provided on both side surfaces of the temperature detecting section 21a and the pressure detecting section 22a, respectively.
One end of each of 1b and 21b is electrically connected. The lead wires 21b and 22b in this embodiment are disposed in parallel with their tips bent outward in order to widen the distance between the wires. The coating material 23 that covers the temperature detection unit 21a, the pressure detection unit 22a, and a part of the lead wire 21b is formed of three layers of insulating films 23a, 23b, and 23c that are adhered to each other. Three layers of insulating films 23a, 23b, 23c
Is a flexible synthetic resin film with sufficient strength,
A film made of rubber, which is an elastic substance, is used. Examples of the synthetic resin include flame-retardant ABS resin and poly-4
Examples thereof include a fluorine resin represented by fluorinated ethylene, a phenol resin, a polyester resin, a polyethylene resin, a polypropylene resin, a polystyrene resin, an epoxy resin, and a polycarbonate. Examples of the rubber include styrene butadiene rubber, acrylonitrile butadiene rubber, butadiene rubber, isoprene rubber, silicon rubber, fluorine rubber, urethane rubber, and acrylic rubber.

The insulating films 23a, 23b and 23c are preferably added with a substance which provides flame retardancy or self-extinguishing properties. Examples of the additive include hexabromobenzene, polytetrafluoroethylene, and tetrafluoroethylene.
Ethylene copolymer, tetrafluoroethylene-perfluoroalkylvinyl ether copolymer, tetrafluoroethylene-6
Organic halides such as fluorinated propylene copolymers, phosphoric esters such as dimethylmethylphosphonate and resoryl phenyl phosphate, or inorganic flame retardants such as antimony trioxide, antimony pentoxide, zinc borate, zinc stannate, etc. No. Insulating film 23a, 2
The thickness of each of 3b and 23c is adjusted to an optimum value according to the type of synthetic resin or the like to be used.
b is formed to be thicker than the thickness of the temperature detecting section 21a and the pressure detecting section 22a, and the insulating films 23a and 23c sandwiching the intermediate insulating film 23b from both sides are connected to the lead wires 2a.
Since it is necessary to ensure insulation between 1b, 22b and the positive and negative electrodes 11, 14, a film having a thickness of 20 to 200 μm is preferable.

A notch 23d corresponding to the external shape of a part of the lead wires 21b, 21b connected to the temperature detecting portion 21a and the pressure detecting portion 22a and both side surfaces thereof is formed in the intermediate insulating film 23b. The notch 23d has a temperature detecting section 21a, a pressure detecting section 22a, and a lead wire 21a.
In the state where a part of b and 21b are inserted, a pair of insulating films 23a and
3c is laminated and bonded. This lamination is performed by using an adhesive or by thermocompression bonding. The coating material 23 composed of the three layers of insulating films 23a, 23b, and 23c is applied to the positive electrode in a state where they are laminated and bonded. 1
It has a width substantially the same as the width direction of the first and negative electrodes 14, and is formed in a flat plate shape having substantially the same outer shape as the single positive electrode 11.

As shown in FIG. 4, the temperature sensor 21 and the pressure sensor 22, which are integrally formed by covering the temperature detecting portion 21a and the pressure detecting portion 22a with the coating material 23, have the width of the coating material 23 set to the negative electrode. The power generator 10 is provided between the stacked negative electrodes 14 so as to match the width of the power generator 10. Here, the coating material 23 is composed of the positive electrode 11 and the negative electrode 1.
And a single positive electrode 11 having substantially the same width as the width direction
Even if the temperature sensor 21 and the pressure sensor 22 are provided and the positive electrode 11 and the negative electrode 14 are laminated, the sensor 2
Due to the presence of 1,2, uneven unevenness does not occur on the lamination surface, and the lamination of the positive electrode 11 and the negative electrode 14 does not become difficult. For this reason, even if the temperature sensor 21 and the pressure sensor 22 are provided in a stacked state, the positive electrode 1
There is no local concentration of stress on the first or negative electrode 14, and the resulting damage to the power generator is effectively prevented.

As shown in FIGS. 2 to 4, all one end portions 12b of the plurality of positive electrode current collector foils 12 are laminated,
One end of the electrode-like positive electrode terminal 26 has a plurality of positive electrode current collector foils 12.
Is inserted between all of the one end portions 12b. In the inserted state, one end of the positive electrode terminal 26 is connected to one end 12 b of all the plurality of positive electrode current collector foils 12 by a plurality of staples 27 caulked in a direction intersecting the insertion direction. On the other hand, all the other ends 15a of the plurality of negative electrode current collector foils 15 are laminated, and one end of the electrode-like negative electrode terminal 28 is connected to all the other ends 15a of the plurality of negative electrode current collector foils 15 laminated. Inserted between. In the inserted state, a plurality of staples 27 caulked in a direction intersecting the insertion direction
Thereby, one end of the negative electrode terminal 28 is connected to all the other ends 15 a of the plurality of negative electrode current collector foils 15. A flexible expanded metal or a perforated metal electrode is used for each of the positive electrode terminal 26 and the negative electrode terminal 28 in this embodiment.

As shown in FIGS. 1 and 2, the power generator 10 having the temperature sensor 21 and the pressure sensor 22 provided therein is hermetically sealed by a package 31. As the package 31 in this embodiment, an aluminum foil laminated with modified polypropylene is used. The power generator 10 is sandwiched between a pair of packages 31 so that the laminated modified polypropylenes are opposed to each other, and the periphery of the stacked packages 31 is thermocompression-bonded in a vacuum atmosphere so that the modified polypropylenes are thermally fused to each other to generate power. 10
Are sealed with a package 31.

At the time of sealing, as shown in FIG. 2, the pair of packages 31 are connected to their positive terminals 26 and 26 such that the other end of the positive terminal 26 and the other end of the negative terminal 28 respectively appear outside the package 31. The negative terminal 28 is interposed. Further, as shown in FIG.
1 and the lead wires 21b and 22 of the pressure sensor 22, respectively.
The lead wires 21b and 22b are sandwiched so that the other end of b is exposed outside the package 31, respectively. And
In this state, the periphery of the pair of packages 31 is thermocompression-bonded,
The secondary battery 9 in which the power generator 10 is sealed in the package 26 is obtained.

In the lithium ion polymer secondary battery 9 thus configured, desired electricity can be obtained by using the other ends of the positive and negative terminals 26 and 28 drawn from the package 31 as terminals of the battery. it can. The secondary battery 9 has a relatively high calorific value when discharging or charging, but since the temperature sensor 21 and the pressure sensor 22 are provided between the stacked negative electrodes 14 of the power generator 10, the power generator When the package 10 is brought into close contact with the package 31, the temperature sensor 21 and the pressure sensor 22
It adheres naturally to the power generator 10 without using the adhesive film body required in 1-162527. Therefore, the sensors 21 and 22 quickly and accurately detect the temperature rise value and the pressure inside the power generator. As a result, a cooling mechanism that cools the secondary battery 9 when the temperature sensor 21 detects a temperature rise equal to or more than a predetermined value, and stops charging when the pressure sensor 22 detects an internal pressure rise. With the appropriate measures, the original safety and reliability of the secondary battery 9 can be improved.

In the above-described embodiment, the secondary battery provided with both the temperature sensor 21 and the pressure sensor 22 is shown. However, the secondary battery may be provided with only the temperature sensor 21. , Only the pressure sensor 22 may be provided. Further, in the above-described embodiment, an example is shown in which both the temperature sensor 21 and the pressure sensor 22 are provided between the stacked negative electrodes 14 of the power generator 10. One or both of them may be provided between the positive electrode 11 and the positive electrode 11 and the negative electrode 14.

Further, in the above-described embodiment, the power generator 10 in which the positive electrode 11 and the negative electrode 14 are laminated is used, and the flat cover having a width substantially equal to the width direction of the positive electrode 11 and the negative electrode 14 is used. Although the material 23 is shown, as shown in FIG. 6, the power generator 10 may be a material in which the positive electrode 11 and the negative electrode 14 are wound, and the coating material 23 is the width of the positive electrode 11 and the negative electrode 14. It may be formed in a rectangular bar shape having the same length as the direction. A positive electrode 11 and a negative electrode 14 are provided by providing one or both of a temperature sensor 21 and a pressure sensor 22 having a rectangular bar-shaped coating material 23.
Is wound, since the covering material 23 has substantially the same length as the width direction of the positive electrode 11 and the negative electrode 14, the presence of the sensors 21 and 22 may cause unevenness on the winding surface. There is no difficulty in winding the positive electrode 11 and the negative electrode 14, and the positive electrode 11 or the negative electrode 1
The local concentration of stress at 4 is avoided.

Furthermore, in the above-described embodiment, the description has been made using the covering material 23 formed by laminating and bonding the three layers of insulating films 23a, 23b, and 23c. One or both of the detection portions 22b can be covered, and the outer shape is formed in a flat plate shape or a rectangular rod shape having substantially the same width or length as the width direction of the positive electrode 11 and the negative electrode 14. If it is, the temperature detecting unit 21a, the pressure detecting unit 22a and a part of the lead wires 21b, 21b connected to both side surfaces thereof are mounted on a mold, and a synthetic resin or rubber is compression-molded or molded into the mold. The coating material 23 in which the temperature detecting section 21a and the like are embedded may be formed by injection molding. However, after compression molding or injection molding of rubber, it is necessary to apply heat to perform vulcanization.

[0026]

As described above, according to the present invention, the temperature detecting section and the pressure detecting section are provided between the stacked or wound power generators between the positive electrode or the negative electrode, or between the positive electrode and the negative electrode. The temperature rise value and the pressure value detected by one or both of the temperature sensor and the pressure sensor are accurate values inside the power generator because one or both of the parts are covered with the coating material. Thus, the temperature rise value or the pressure inside the power generator can be detected quickly and accurately. In this case, the coating material is formed in a flat plate or a rectangular rod shape having substantially the same width or length as the width direction of the positive electrode and the negative electrode, and the width or length of the coating material is adjusted to the width of the positive electrode or the negative electrode. If a coating material is provided between the stacked or wound positive electrode or between the negative electrode or between the positive electrode and the negative electrode of the power generator, even if the positive electrode and the negative electrode are stacked or wound, The presence of this coating material does not cause unevenness on the lamination surface or winding surface of the positive electrode and the negative electrode, and does not make lamination or winding of the positive electrode and the negative electrode difficult. For this reason, even when laminating or winding with this coating material provided, stress is not locally concentrated on the positive electrode or the negative electrode, and damage to the power generator caused thereby can be effectively prevented. .

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line AA of FIG. 2 showing a secondary battery of the present invention.

FIG. 2 is a cross-sectional view of the secondary battery taken along line BB of FIG. 1;

FIG. 3 is a perspective view of a power generator in the secondary battery.

FIG. 4 is an exploded perspective view showing the configuration of the secondary battery.

FIG. 5 is an exploded perspective view showing the configuration of the temperature sensor and the pressure sensor.

FIG. 6 is a perspective view showing the configuration of another power generator according to the present invention.

[Explanation of symbols]

 Reference Signs List 9 secondary battery 10 power generator 11 positive electrode 14 negative electrode 17 separator 21 temperature sensor 21a temperature detector 22 pressure sensor 22a pressure detector 23 coating material 31 package

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiro Higami 1-297 Kitabukurocho, Omiya City, Saitama Prefecture Inside Mitsubishi Materials Corporation Research Institute (72) Inventor Morinbin Zhang 1-297 Kitabukurocho, Omiya City, Saitama Mitsubishi Material Co., Ltd. F-term (Reference) 5H029 AJ12 BJ02 BJ14 DJ02 DJ04 5H030 AA10 AS01 AS08 FF22 FF31 FF64

Claims (4)

[Claims] A power generator (1) comprising a positive electrode (11) and a negative electrode (14) laminated or wound via a separator (17).
0), a temperature sensor (21) configured to be covered with a coating material (23) with a temperature detecting section (21a) and detecting the temperature of the power generator (10).
And a package (31) for sealing the power generator (10) together with the temperature sensor (21), in a non-aqueous electrolyte secondary battery, wherein the power generator (10) is a laminated or wound positive electrode ( 11), between the negative electrode (14), or between the positive electrode (11) and the negative electrode (14), the temperature detecting portion (21a) is provided in a state covered by the coating material (23). Non-aqueous electrolyte secondary battery characterized by the following. 2. A power generator (1) comprising a positive electrode (11) and a negative electrode (14) laminated or wound via a separator (17).
0), a package (31) for sealing the power generator (10), and a pressure sensor configured to cover the pressure detecting portion (22a) with a coating material (23) and configured to detect the pressure inside the package (31). (22), a non-aqueous electrolyte secondary battery comprising: between the stacked or wound positive electrode (11) or between the negative electrode (14) or the positive electrode (11) of the power generator (10) and A non-aqueous electrolyte secondary battery, wherein the pressure detecting portion (22a) is provided between the negative electrode (14) in a state covered by a coating material (23). 3. A power generator (1) configured by laminating or winding a positive electrode (11) and a negative electrode (14) via a separator (17).
0), a temperature sensor (21) configured to be covered with a coating material (23) with a temperature detecting section (21a) and detecting the temperature of the power generator (10).
And a package (31) for sealing the power generator (10) together with the temperature sensor (21), and a pressure detector (22a) comprising a coating material (23).
A non-aqueous electrolyte secondary battery including a pressure sensor (22) configured to detect a pressure inside the package (31), wherein the temperature detection unit (21a) and the pressure detection unit (22a) The power generating body (10) is laminated or wound with the temperature detecting unit (21a) and the pressure detecting unit (22a) being covered with the covering material (23). A nonaqueous electrolyte secondary battery provided between the turned positive electrode (11) or between the negative electrode (14) or between the positive electrode (11) and the negative electrode (14). 4. The coating material (23) comprises a positive electrode (11) and a negative electrode.
(14) is formed in the shape of a flat plate or a rectangular rod having substantially the same width or length as the width direction of the coating material (23), and the width or length of the coating material (23) of the positive electrode (11) or the negative electrode (14). The coating between the stacked or wound positive electrode (11) or between the negative electrode (14) or between the positive electrode (11) and the negative electrode (14) of the power generator (10) according to the width. The non-aqueous electrolyte secondary battery according to any one of claims 1 to 3, further comprising a material (23).