JP2001222990A - Battery and portable information device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery which is manufactured at a less cost with pos sible miniaturization and highly safe property. SOLUTION: The battery 20a has the following components: a battery core 21 to generate power, an anode terminal 22 and a cathode terminal 23 connected to the battery core 21, a laminated film 26 covering a part of the battery core 21 and a part of anode terminal 22 and cathode terminal 23, and a wiring layer 24 that is formed on a print circuit board 12 so as to electrically connected with the anode terminal 22 and that has a fusible part 24a which is cut by fusing when the current is over a predetermined level, and a PTC element 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery and a portable information terminal, and more particularly, to a battery having a safety function for preventing an abnormal rise in current value when short-circuiting or overcharging is performed, and a battery therefor. It relates to the portable information terminal used.

[0002]

2. Description of the Related Art In recent years, portable information terminals such as portable telephones, notebook computers, and video cameras have become widespread.
These portable information terminals use batteries for supplying power. As this battery, rechargeable 2
Secondary batteries are used.

In a battery for a portable information terminal, a current flowing through the battery increases when a short circuit occurs in the electric circuit for some reason or when the battery is charged with a large voltage. As a result, the battery generates excessive heat, and in the worst case, the battery may explode. To solve this problem, conventionally, a PTC element (Positive T
An element called emperature coefficient is incorporated. The electric resistance of the PTC element increases as the current flowing through the PTC element increases and the temperature increases,
When a certain temperature is reached, the resistance rises sharply and acts to suppress the current. Therefore, for example, when a battery having a PTC element is charged at a predetermined voltage or more, the PTC
The current flowing through the element becomes excessively large. And PT
When the temperature of the C element reaches a certain temperature, the resistance of the PTC element rises rapidly and suppresses the current. This can prevent the battery from becoming too hot.

[0004]

In recent years, the use of not only home power supplies but also automobile batteries as power supplies for charging batteries used in portable information terminals has been studied. Usually, the voltage of an automobile battery is 12 V for a passenger car and 24 V for a large automobile such as a truck.
V. On the other hand, the voltage of the battery used in the portable information terminal is about 4V. Therefore, when charging the battery from the vehicle battery, it is necessary to reduce the voltage to about 4V. However, there is a case where a battery for a portable information terminal is directly connected to a battery of an automobile to perform charging. In this case, the battery has 12V or 24V
A voltage of V is applied. When such a high voltage is applied, the above-mentioned PTC element causes dielectric breakdown, and there is a problem that the PTC element cannot reduce the current value flowing in the battery. Therefore, there is a problem that the temperature of the battery rises rapidly, and in the worst case, the battery explodes and an accident occurs.

Further, there is a case where so-called reverse charging is performed, in which the positive electrode of the battery is connected to the negative electrode of the power supply for charging and the negative electrode of the battery is connected to the positive electrode of the power supply for charging. When reverse charging is performed, a larger current flows than when a short circuit occurs in the electric circuit, and the temperature of the battery rises rapidly. Also in this case, the PTC element causes dielectric breakdown, and the battery explodes as described above.

[0006] Conventionally, in order to prevent such a rapid temperature rise, a battery in which a PTC element and a fuse made of a low melting point alloy are combined and these are housed in a battery pack is disclosed in Japanese Patent Laid-Open No. 6-349480. It is described in the gazette.

However, in the battery described in the above publication,
Since the PTC element and the fuse are provided in the battery pack, the PTC element or the fuse may come into contact with a conductive member in the battery pack. In this case, PTC
There has been a problem that the element and the fuse do not work to reduce the current, and the reliability is low.

Further, since the PTC element and the fuse are provided in the battery pack, there is a problem that the battery pack becomes large and the manufacturing cost increases.

In addition, there is a problem that the manufacturing cost is increased because a fuse which has not been conventionally provided is provided.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a battery and a portable information terminal which are highly reliable, can be miniaturized, and can be manufactured at low cost. It is intended for.

[0011]

A battery according to one aspect of the present invention includes a power generating element, a positive electrode terminal and a negative electrode terminal, an exterior member, a wiring layer, and a current control unit. The power generating element generates electric power. The positive terminal and the negative terminal are connected to the power generating element. The exterior member covers a part of the power generation element and the positive electrode terminal and the negative electrode terminal. The wiring layer is formed on the insulating substrate so as to be electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and has a fusible portion that melts and cuts when a predetermined current value is exceeded. The current control means is electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and reduces the value of the current flowing through the power generating element as the value of the current flowing through the power generating element increases. The fusible portion and the current control means are exposed from the exterior member.

In the battery configured as described above, when a short circuit occurs in the electric circuit, the current amount control means controls the current amount. If the current control means cannot control the current in the case of overcharging or reverse charging, the fusible portion melts and the current is cut off. Therefore, the temperature of the battery does not become too high, and the safety is improved. Also, since the fusible portion and the current amount control means are exposed from the exterior member,
These members do not come into contact with, for example, a power generation element in the exterior member. Therefore, even when a large current flows, the fusible portion is reliably melted and cut, thereby increasing the reliability of the battery. Further, since the fusible portion and the current control means are exposed from the exterior member, the exterior member can be downsized. Further, since the fusible portion is formed in the wiring layer, the fusible portion can be formed simultaneously with the formation of the wiring. Therefore, a fusible portion can be formed without providing a new member, and an increase in manufacturing cost can be suppressed. In the present invention, a PTC element or a thermal protector can be used as the current control means.

Preferably, one of the current control means and the fusible part is connected to the positive terminal, and the other of the current control means and the fusible part is connected to the negative terminal. In this case, the size of the battery can be reduced as compared with the case where the current amount control means and the fusible portion are connected to one of the positive terminal and the negative terminal.

Preferably, a fusible portion is connected to each of the positive terminal and the negative terminal. in this case,
Even if the fusible portion connected to one of the positive electrode terminal and the negative electrode terminal does not melt for some reason when the current value exceeds a predetermined value, the other fusible portion can be melted to interrupt the current. . Therefore, the reliability of the device can be further improved.

Preferably, the fusible portion of the wiring layer and a portion other than the fusible portion of the wiring layer have substantially the same thickness. In this case, by patterning the same conductive material, a wiring layer including a fusible portion and other portions can be formed, and the wiring layer can be formed in a small number of steps.

Preferably, the fusible portion of the wiring layer and portions other than the fusible portion of the wiring layer are made of the same material. In this case, the material does not change with time as compared with the case where another material is used, and the durability of the wiring layer can be improved.

Preferably, the fusible portion of the wiring layer has a relatively small cross-sectional area, and portions other than the fusible portion of the wiring layer have a relatively large cross-sectional area. In this case, by controlling the cross-sectional area of the fusible portion, the current value at which the fusible portion melts and cuts can be accurately controlled.

Preferably, the battery is attached to the portable information terminal such that the direction in which the antenna of the portable information terminal extends and the direction in which the fusible portion extends are substantially orthogonal to each other. In this case, since the antenna and the fusible portion are positioned so as to be substantially orthogonal, the electromagnetic wave transmitted and received by the antenna is not affected by the fusible portion. Therefore, the reliability of the portable information terminal increases.

Preferably, the length L of the fusible portion is defined so that the wavelength λ of the radio wave for wireless communication and the length L of the fusible portion satisfy the relationship represented by L ≦ λ / 4. . In this case, since the length L of the fusible portion and the wavelength λ of the radio wave satisfy the above-described relationship, the fusible portion does not adversely affect the radio wave.

Preferably, the wiring layer includes a plurality of fusible portions. The plurality of fusible portions are connected in parallel to one of the positive terminal and the negative terminal. in this case,
The current value at which the fusible portion melts and cuts can be set according to the number of fusible portions.

Preferably, the fusible portion is formed to extend in a meandering manner. In this case, since the fusible portion extends in a meandering manner, a long fusible portion exists in a small volume portion. Therefore, the electric resistance of the fusible portion increases, and the heat generated from the fusible portion is less likely to be radiated to the outside. As a result, the temperature of the fusible portion easily rises, and the fusible portion is easily melted and cut.

[0022] A portable information terminal according to one aspect of the present invention includes a main body, an antenna, and a battery. The antenna is attached to the body and extends in one direction. The battery is mounted on the body. The battery includes a power generation element, a positive electrode terminal and a negative electrode terminal, an exterior member, a wiring layer, and a current control unit. The power generating element generates electric power. The positive terminal and the negative terminal are connected to the power generating element. The exterior member covers the power generation element and a part of the positive electrode terminal and the negative electrode terminal. The wiring layer is
A fusible portion is formed on the insulating substrate so as to be electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and is melted and cut when exceeding a predetermined current value. The current control means is electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and reduces the value of the current flowing through the power generating element as the value of the current flowing through the power generating element increases. The wiring layer and the current control means are exposed from the exterior member. The direction in which the antenna extends and the direction in which the fusible portion extends are substantially orthogonal to each other.

In the portable information terminal configured as described above,
When a short circuit occurs in the electric circuit, the current amount control means controls the current amount. If the current control means cannot control the current in the case of overcharging or reverse charging, the fusible portion melts and the current is cut off. Therefore, the temperature of the battery does not become too high, and the safety is improved. Further, since the fusible portion and the current control means are exposed from the exterior member, these members do not come into contact with, for example, a power generation element in the exterior member. Therefore, even when a large current flows, the fusible portion is reliably melted and cut, thereby increasing the reliability of the battery. Further, since the fusible portion and the current control means are exposed from the exterior member, the exterior member can be downsized. Further, since the fusible portion is formed in the wiring layer, the fusible portion can be formed simultaneously with the formation of the wiring. Therefore, a fusible portion can be formed without providing a new member, and an increase in manufacturing cost can be suppressed. In addition, since the direction in which the antenna extends and the direction in which the fusible portion extends are substantially orthogonal to each other, the radio waves for wireless communication are not adversely affected and the reliability is high.

A portable information terminal according to another aspect of the present invention includes a main body and a battery. The main body has a wireless communication function. The battery is mounted on the body. The battery is a power generation element,
It includes a positive electrode terminal and a negative electrode terminal, an exterior member, a wiring layer, and current amount control means. The power generating element generates electric power. The positive terminal and the negative terminal are connected to the power generating element.
The exterior member covers the power generation element and a part of the positive electrode terminal and the negative electrode terminal. The wiring layer is formed on the insulating substrate so as to be electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and has a fusible portion that melts and cuts when a predetermined current value is exceeded. The current control means is electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and reduces the value of the current flowing through the power generating element as the value of the current flowing through the power generating element increases. The wiring layer and the current control means are exposed from the exterior member. The wavelength λ of the radio wave for wireless communication and the length L of the fusible portion satisfy the relationship represented by L ≦ λ / 4.

In the portable information terminal configured as described above,
When a short circuit occurs in the electric circuit, the current amount control means controls the current amount. If the current control means cannot control the current in the case of overcharging or reverse charging, the fusible portion melts and the current is cut off. Therefore, the temperature of the battery does not become too high, and the safety is improved. Further, since the fusible portion and the current control means are exposed from the exterior member, these members do not come into contact with, for example, a power generation element in the exterior member. Therefore, even when a large current flows, the fusible portion is reliably melted and cut, thereby increasing the reliability of the battery. Further, since the fusible portion and the current control means are exposed from the exterior member, the exterior member can be downsized. Further, since the fusible portion is formed in the wiring layer, the fusible portion can be formed simultaneously with the formation of the wiring. Therefore, a fusible portion can be formed without providing a new member, and an increase in manufacturing cost can be suppressed. Further, since the length L of the fusible portion and the wavelength λ of the radio wave satisfy the above relationship, the fusible portion does not adversely affect the radio wave.

A battery according to another aspect of the present invention includes a power generating element, a positive electrode terminal and a negative electrode terminal, an exterior member, and a current control unit. The power generating element generates a current.
The positive terminal and the negative terminal are connected to the power generating element. The exterior member covers the power generation element and a part of the positive electrode terminal and the negative electrode terminal. The current control means is electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and reduces the value of the current flowing through the power generating element as the value of the current flowing through the power generating element increases. At least one of the positive electrode terminal and the negative electrode terminal has a fusible portion that melts and cuts when a predetermined current value is exceeded. The fusible portion and the current control means are exposed from the exterior member.

In the battery configured as described above, when a short circuit occurs in the electric circuit, the current amount control means controls the current amount. If the current control means cannot control the current in the case of overcharging or reverse charging, the fusible portion melts and the current is cut off. Therefore, the temperature of the battery does not become too high, and the safety is improved. Further, since the fusible portion and the current control means are exposed from the exterior member, these members do not come into contact with, for example, a power generation element in the exterior member. Therefore, even when a large current flows, the fusible portion is reliably melted and cut, thereby increasing the reliability of the battery. Further, since the fusible portion and the current control means are exposed from the exterior member, the exterior member can be downsized. Further, a fusible portion is formed in a part of the positive electrode terminal or the negative electrode terminal. Therefore, the fusible portion can be manufactured at the same time when the positive electrode terminal or the negative electrode terminal is manufactured, and the manufacturing cost is not increased.

Preferably, a fusible portion is formed on each of the positive electrode terminal and the negative electrode terminal. In this case, even when the fusible portion formed on one of the positive electrode terminal and the negative electrode terminal does not melt for some reason when the current value exceeds a predetermined value, the other fusible portion melts and interrupts the current. be able to. Therefore, the reliability of the device can be further improved.

Preferably, the fusible portion and the portions of the positive electrode terminal and the negative electrode terminal other than the fusible portion have substantially the same thickness. In this case, since the fusible portion can be formed by removing a part of the positive electrode terminal and the negative electrode terminal, the manufacturing cost does not increase.

Preferably, the fusible portion and the portions of the positive electrode terminal and the negative electrode terminal other than the fusible portion are made of the same material. In this case, there is no change with time of the material as compared with the case where another material is used, and the durability is improved.

Preferably, the fusible portion has a relatively small cross-sectional area, and the portions of the positive electrode terminal and the negative electrode terminal other than the fusible portion have a relatively large cross-sectional area. In this case, by controlling the cross-sectional area of the fusible portion, the current value at which the fusible portion melts and cuts can be accurately controlled.

Preferably, the battery is attached to the portable information terminal such that the direction in which the antenna of the portable information terminal extends and the direction in which the fusible portion extends are substantially orthogonal to each other. In this case, since the antenna and the fusible portion are positioned so as to be substantially orthogonal, the electromagnetic wave transmitted and received by the antenna is not affected by the fusible portion. Therefore, the reliability of the portable information terminal increases.

Preferably, the length L of the fusible portion is defined so that the wavelength λ of the radio wave for wireless communication and the length L of the fusible portion satisfy the relationship represented by L ≦ λ / 4. . In this case, since the length L of the fusible portion and the wavelength λ of the radio wave satisfy the above relationship, the fusible portion does not adversely affect the electromagnetic waves.

Preferably, the fusible portion is formed to extend in a meandering manner. In this case, since the fusible portion extends in a meandering manner, a long fusible portion exists in a small volume portion. Therefore, the electric resistance of the fusible portion increases, and the heat generated from the fusible portion is less likely to be radiated to the outside. As a result, the temperature of the fusible portion easily rises, and the fusible portion is easily melted and cut.

A portable information terminal according to another aspect of the present invention includes a main body, an antenna, and a battery. The antenna is attached to the body and extends in one direction. The battery is mounted on the body. The battery includes a power generating element, a positive electrode terminal and a negative electrode terminal, an exterior member, and a current control unit. The power generating element generates electric power. The positive terminal and the negative terminal are connected to the power generating element. The exterior member covers the power generation element and a part of the positive electrode terminal and the negative electrode terminal. The current amount control means is electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and reduces the current value flowing through the power generation element as the current value flowing through the power generation element increases. At least one of the positive electrode terminal and the negative electrode terminal has a fusible portion that melts and cuts when a predetermined current value is exceeded. The fusible portion and the current control means are exposed from the exterior member. The direction in which the antenna extends and the direction in which the fusible portion extends are substantially orthogonal to each other.

In the portable information terminal configured as described above,
When a short circuit occurs in the electric circuit, the current amount control means controls the current amount. If the current control means cannot control the current in the case of overcharging or reverse charging, the fusible portion melts and the current is cut off. Therefore, the temperature of the battery does not become too high, and the safety is improved. Further, since the fusible portion and the current control means are exposed from the exterior member, these members do not come into contact with, for example, a power generation element in the exterior member. Therefore, even when a large current flows, the fusible portion is reliably melted and cut, thereby increasing the reliability of the battery. Further, since the fusible portion and the current control means are exposed from the exterior member, the exterior member can be downsized. Further, a fusible portion is formed in a part of the positive electrode terminal or the negative electrode terminal. Therefore, the fusible portion can be manufactured at the same time when the positive electrode terminal or the negative electrode terminal is manufactured, and the manufacturing cost is not increased. Further, since the direction in which the antenna extends and the direction in which the fusible portion extends are substantially orthogonal to each other, the fusible portion does not adversely affect electromagnetic waves transmitted and received from the antenna.

A portable information terminal according to another aspect of the present invention includes a main body and a battery. The main body has a wireless communication function. The battery is mounted on the body. The battery includes a power generating element, a positive electrode terminal and a negative electrode terminal, an exterior member, and a current control unit. The power generating element generates electric power. The positive terminal and the negative terminal are connected to the power generating element. The exterior member covers the power generation element and a part of the positive electrode terminal and the negative electrode terminal. The current amount control means is electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and reduces the current value flowing through the power generation element as the current value flowing through the power generation element increases. At least one of the positive electrode terminal and the negative electrode terminal has a fusible portion that melts and cuts when a predetermined current value is exceeded. The fusible portion and the current control means are exposed from the exterior member. The wavelength λ of the radio wave for wireless communication and the length L of the fusible portion satisfy the relationship represented by L ≦ λ / 4.

In the portable information terminal configured as described above,
When a short circuit occurs in the electric circuit, the current amount control means controls the current amount. If the current control means cannot control the current in the case of overcharging or reverse charging, the fusible portion melts and the current is cut off. Therefore, the temperature of the battery does not become too high, and the safety is improved. Further, since the fusible portion and the current control means are exposed from the exterior member, these members do not come into contact with, for example, a power generation element in the exterior member. Therefore, even when a large current flows, the fusible portion is reliably melted and cut, thereby increasing the reliability of the battery. Further, since the fusible portion and the current control means are exposed from the exterior member, the exterior member can be downsized. Further, a fusible portion is formed in a part of the positive electrode terminal or the negative electrode terminal. Therefore, the fusible portion can be manufactured at the same time when the positive electrode terminal or the negative electrode terminal is manufactured, and the manufacturing cost is not increased. Furthermore, since the wavelength λ of the radio wave and the length L of the fusible portion satisfy the above-described relationship, the fusible portion does not adversely affect the radio wave, so that the portable information terminal has high reliability.

[0039]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a top view of a mobile phone according to Embodiment 1 of the present invention. Referring to FIG. 1, a mobile phone 1a as a mobile information terminal according to Embodiment 1 of the present invention has a housing 2 as a main body. An antenna 40, a display panel 4, and operation keys 5 are attached to the housing 2. An antenna 40 in the housing 2;
The display panel 4 and the operation keys 5 are mounted. The antenna 40 is attached to the front end of the housing 2 and is formed of a linear conductor extending in the direction indicated by the arrow 40a. Most of the antenna 40 is housed in the housing 2 and the mobile phone 1
When a is used, it is used so as to protrude from the housing 2.

The display panel 4 is arranged at the center of the housing 2. The display panel 4 is composed of liquid crystal, and the mobile phone 1
The data received by a and the data transmitted by the mobile phone 1a are displayed in characters. The operation key 5 is attached to the center of the housing 2. The operation key 5 is a member for inputting information to an internal circuit provided in the mobile phone, and a person can input information by manually pressing the operation key 5.

FIG. 2 is a diagram for explaining the structure of the portable telephone and the battery according to the first embodiment of the present invention. Referring to FIG. 2, a mobile phone 1a includes a housing 2, an antenna 40, a printed circuit board 10 as an insulating substrate, a main circuit 30, and a battery 20a according to the first embodiment of the present invention.
And A printed circuit board 10 is fixed to a housing 2 as a main body. The main circuit 30 is provided on the printed circuit board 10.
Is provided. Power is supplied from the battery 20a to the main body circuit 30.

The printed circuit board 10 has a substantially rectangular shape.
It is composed of an insulating substrate and wiring formed on the surface of the substrate. The mobile phone 1 on the printed circuit board 10
A main circuit 30 is provided for processing radio waves transmitted and received by a. The main body circuit 30 is configured by electronic components such as wiring, resistors, capacitors, and coils. The battery 20a is electrically connected to the main body circuit 30. Battery 20
a is fixed to the printed circuit board 10. Battery 20a
Are a battery core 21 as a power generation element, a laminate film 26 as an exterior member, a positive electrode terminal 22, a negative electrode terminal 23, a wiring layer 24, and a PT as a current amount control means.
C element 25. A laminate film 26 covers the battery core 21 and a part of the positive terminal 22 and a part of the negative terminal 23. A positive electrode terminal 22 and a negative electrode terminal 23 are electrically connected to the battery core 21.

The laminate film 26 is made of a composite material in which an aluminum foil is sandwiched between polymer resins such as polypropylene and polyethylene. Therefore, the laminate film 26 has a three-layer structure of a polymer resin, an aluminum foil, and a polymer resin. Further, the thickness of the laminate film 26 is 300 μm or less.

The battery core 21 is provided so as to be surrounded and sealed by the laminate film 26. The battery core 21 is formed by winding a predetermined laminate. Battery core 21 is electrically connected to positive terminal 22 and negative terminal 23. 1st sheet (current collector aluminum foil)
And a second thin plate (a current collector copper foil) and a separator interposed therebetween to form a laminate. The current collector aluminum foil is connected to the positive terminal 22. The current collector copper foil is connected to the negative electrode terminal 23. A metal oxide containing lithium (a positive electrode active material) is applied to the current collector aluminum foil. An organic material containing lithium (a negative electrode active material) is applied to the current collector copper foil.

The positive electrode terminal 22 is made of aluminum foil, has a thickness of 0.2 to 0.5 mm, and has dimensions
The length × width is 7 mm × 4 mm. The negative electrode terminal 23 is made of aluminum foil and has a thickness of 0.2 to 0.5 m.
m, and the size is 7 mm × 4 mm in length × width.

The wiring layer 24 made of copper is connected to the positive electrode terminal 22. At both ends of the wiring layer 24,
A relatively wide wiring portion 24b is formed, and a relatively narrow fusible portion 24 is formed at the center of the wiring layer 24.
a is formed. The fusible portion 24a is connected to the battery core 2
The cross-sectional area is reduced so that when the current value flowing through the wiring layer 1 and the wiring layer 24 exceeds a predetermined current value, the cutting is performed.
That is, even if the current passing through the wiring layer 24 is constant, the current density of the current passing through the wiring portion 24b is relatively small and the current density of the current passing through the fusible portion 24a is large due to the difference in cross-sectional area. As a result, the fusible portion 24a rapidly generates heat, and this portion is melted to break the wiring layer 24. Although the wiring layer 24 is made of the same material in FIG. 2, the wiring portion 24b may be made of a material having a high melting point, and the fusible portion 24a may be made of a material having a low melting point.

The PTC element 25 is connected to the wiring layer 24. As the value of the current flowing through the PTC element 25 increases, the temperature of the PTC element 25 increases, and the electric resistance gradually increases. When the current value exceeds a predetermined value, the resistance rapidly increases. Therefore, the PTC element 25 is
1 has a function of decreasing the value of the current flowing in the battery core 21 as the value of the current flowing in the battery core 21 increases. The PTC element 25 can be replaced with a thermal protector. The fusible portion 24a and P
The TC element 25 is connected. The PTC element 25 is connected to the main circuit 30 by a wiring layer 31. The negative terminal 23 is connected to the main circuit 30 by a wiring layer 32. PTC element 25, positive terminal 22 and negative terminal 23
And the fusible part 24a are laminated film 2
It is exposed from 6.

FIG. 3 is a cross section of each part of the battery shown in FIG. FIG. 3A is a diagram showing a cross section according to one aspect viewed along line AA in FIG. 2, and FIG. 3B is a line BB in FIG. FIG. 4 is a diagram showing a cross section viewed along the line. FIG. 3C is a diagram showing a cross section viewed along line CC in FIG. (D) in FIG. 3 corresponds to A in FIG.
FIG. 9 is a diagram illustrating a cross section according to another aspect viewed along line −A.

Referring to FIG. 3A, printed circuit board 1
The fusible portion 24a is formed on the zero. The cross section of the fusible portion 24a is substantially rectangular. Fusible part 24
a has a height T ₁ of about 30 to 40 μm and a width W ₁ of about 20 μm.
0 μm. When the current flowing through the fusible portion 24a made of copper becomes approximately 8 A, the fusible portion 24a melts and the wiring layer 24 is disconnected. As the cross-sectional area of the fusible portion 24a decreases, the resistance of the fusible portion 24a increases, and the fusible portion 24a is melted and cut with a small current.

Referring to FIG. 3B, wiring portion 24b
Is formed on the printed circuit board 10. The cross section of the wiring portion 24b is substantially rectangular. The height of the wiring portion 24b is T
₁ , and the width W ₂ is about 500 μm.

Referring to FIG. 3C, printed circuit board 1
The wiring layer 24 is formed on the reference numeral 0. The wiring layer 24 includes a fusible portion 24a and a wiring portion 24b connected to the fusible portion 24a. Length L of fusible portion 24a
Is about 5 mm. As the length of the fusible portion 24a increases, the resistance of the fusible portion 24a increases, and the fusible portion 24a is melted and cut with a small current. Specifically, if the length of the fusible portion 24a is about 10 mm, the fusible portion 24a is melted and cut at a current of about 5 A, and if the length of the fusible portion 24a is about 2 mm, the length of the fusible portion 24a is about 10 A. The fusible portion 24a is melted and cut by the electric current. Therefore, by adjusting the length and cross-sectional area of the fusible portion 24a, the fusible portion 2a is adjusted.
4a can set a current value for melting and cutting. The positive terminal 2 is connected to the wiring portion 24b. The positive electrode terminal 22 is connected to the battery core 21. The battery core 21 and a part of the positive electrode terminal 22 are covered with a laminate film 26. The laminated film 26 is made of a resin layer 26
a, an aluminum layer 26b and a resin layer 26a. The laminate film 26 is in direct contact with the printed circuit board 10. Wavelength λ of radio wave for wireless communication
The length L of the fusible portion 24a is defined so that the length L of the fusible portion 24a satisfies the relationship represented by L ≦ λ / 4.

Referring to FIG. 3D, printed circuit board 1
The solder layer 27 may be provided on the fusible portion 24a on the zero.
In FIG. 3D, the size of the fusible portion 24a is the same as that shown in FIG. 3A, but the size of the fusible portion 24a may be reduced and the size of the solder layer 27 may be increased. .
As shown in FIG. 3D, the structure may be such that the solder layer 27 is formed only on the fusible portion 24a and the solder layer is not formed on the wiring portion 24b. The fusible portion 24a
Alternatively, a solder layer may be formed on both the wiring portion 24b. Further, the solder layer may be formed only on the wiring portion 24b without forming the solder layer on the fusible portion 24a.

When charging the battery 20a configured as described above, the positive terminal of the charging power supply is connected to the PTC element 25, and the negative terminal of the charging power supply is connected to the negative terminal 23. In this state, charging can be performed by applying the voltage of the charging power supply to the battery 20a.

The battery 20a thus configured first has a PTC element 25 as a safety element and a fusible portion 24a. Therefore, when a large current flows in the battery core 21 due to a short circuit or the like, the PTC element 25
Operates, the value of the current flowing through the battery core 21 can be reduced. Furthermore, when charging or reverse charging is performed by overvoltage and the PTC element 25 stops operating, a large current flows through the fusible portion 24a of the wiring layer 24.
As a result, the fusible portion 24a is melted and cut, so that the current can be cut off. Thereby, the battery core 21 can be prevented from becoming too hot, and the safety can be increased.

Further, since the fusible portion 24a is not covered with the laminate film 26 but is exposed from the laminate film 26, the fusible portion 24a is not affected by the electrolyte or the like in the laminate film 26. Therefore, when a predetermined current flows, the connection is reliably cut, so that the reliability is improved. Also,
The fusible portion 24a can be formed simultaneously with the formation of the wiring portion 24. Therefore, the fusible portion 24a can be formed without particularly increasing the number of manufacturing steps. Further, since the fusible portion 24a is not covered with the laminate film 26, the number of members covered by the laminate film 26 is reduced. Therefore, there is an effect that the size of the laminated film 26 can be reduced and the manufacturing cost does not increase.

Also, the mobile phone 1a according to the present invention
Is provided with the battery 20a having the above-described effects, and therefore has high safety.

(Embodiment 2) FIG. 4 is a diagram for illustrating the structure of a portable telephone and a battery according to Embodiment 2 of the present invention. Referring to FIG. 4, a mobile phone 1b according to a second embodiment of the present invention has a mobile phone 1c according to a third embodiment of the present invention.
And a battery 20b according to the above. The structure of the battery 20b is shown in FIG.
Is different from the battery 20a. That is, in the battery 20b,
The fusible portion 24a of the wiring layer 24 is substantially orthogonal to the direction in which the antenna 40 extends (the direction indicated by the arrow 40a), and differs from the battery 20a shown in FIG. 2 which does not have such a structure.

The mobile phone 1b and the battery 20b thus configured have the same effects as those of the mobile phone 1a and the battery 20a described in the first embodiment. Further, the direction in which the fusible portion 24a extends is substantially orthogonal to the direction in which the antenna 40 extends. Since the fusible portion 24a has a small width, this portion particularly easily affects radio waves. However, since the narrow portion is positioned so as to be orthogonal to the direction in which the antenna 40 extends, the influence on the radio wave is reduced. Therefore, in the mobile phone 1b, compared with the mobile phone 1a according to the first embodiment, there is an effect that radio wave modulation does not occur and a drop in voice can be prevented.

(Embodiment 3) FIG. 5 is a diagram for illustrating a structure of a mobile phone and a battery according to Embodiment 3 of the present invention. Referring to FIG. 5, a mobile phone 1c according to a third embodiment of the present invention is similar to the third embodiment of the present invention.
Battery 20c according to the above. The structure of the battery 20c is shown in FIG.
Is different from the battery 20a. That is, in the battery 20c, the positive terminal 22 is connected to the PTC element 25 and the fusible portion 24a in order, and the positive terminal 22 is connected to the battery 20a in which the fusible portion 24a and the PTC element 25 are connected in sequence. different.

The battery 20c has the same effect as the battery 20a shown in FIG. Further, such a mobile phone 1c has the same effect as the mobile phone 1a shown in FIG.

(Embodiment 4) FIG. 6 is a diagram for illustrating a structure of a portable telephone and a battery according to Embodiment 4 of the present invention. Referring to FIG. 6, a mobile phone 1d according to a fourth embodiment of the present invention is similar to the fourth embodiment of the present invention.
And a battery 20d according to the following. The structure of the battery 20d is shown in FIG.
Is different from the battery 20c indicated by. That is, in the battery 20d, the direction in which the fusible portion 24a extends is substantially orthogonal to the direction in which the antenna 40 extends (the direction indicated by the arrow 40a).
This is different from the battery 20c shown in FIG.

The portable telephone 1d and the battery 20d thus configured have the same effects as the portable telephone 1c and the battery 20c described in the first embodiment.

Since the fusible portion 24a has a small width, this portion is particularly liable to affect radio waves. However, since the narrow portion is positioned so as to be orthogonal to the direction in which the antenna 40 extends, the influence on the radio wave is reduced. Therefore, in this mobile phone 1d,
Compared to the mobile phone 1c according to the third embodiment, there is an effect that radio wave modulation and the like do not occur and a drop in sound can be prevented.

(Embodiment 5) FIG. 7 is a diagram for illustrating a structure of a mobile phone and a battery according to Embodiment 5 of the present invention. Referring to FIG. 7, a mobile phone 1e according to the fifth embodiment of the present invention has battery 20e according to the fifth embodiment. Battery 20e shown in FIG.
0a. That is, in the battery 20e, the negative electrode terminal 23
And a wiring layer 24 having a fusible portion 24a and a P
The difference from the battery 20a shown in FIG. 2 in which the wiring layer 24 and the PTC element 25 are connected to the positive electrode terminal 22 in order is that the TC element 25 is connected. The positive terminal 22 is the wiring layer 3
1 is connected to the main circuit 30, and the PTC element 25 is connected to the main circuit 30 by the wiring layer 32.

The battery 20e thus configured has the same effect as the battery 20a shown in FIG.

The mobile phone 1e thus configured
Has the same effect as the mobile phone 1a shown in FIG.

(Embodiment 6) FIG. 8 is a diagram for illustrating a structure of a mobile phone and a battery according to Embodiment 6 of the present invention. Referring to FIG. 8, a mobile phone 1f according to a sixth embodiment of the present invention is similar to the sixth embodiment of the present invention.
And a battery 20f according to the following. The structure of the battery 20f is shown in FIG.
Is different from the battery 20e indicated by. That is, the battery 20f differs from the battery 20e shown in FIG. 7 in that the fusible portion 24a of the wiring layer 24 is positioned so as to be substantially orthogonal to the direction in which the antenna 40 extends (the direction indicated by the arrow 40a). The wiring layer 24 is connected to the PTC element 25 by the wiring layer 32, and the PTC element 25 is connected to the main circuit 30. Positive electrode terminal 22 is connected to main circuit 30 by wiring layer 31.

The portable telephone 1f and the battery 20f thus configured have the same effects as the portable telephone 1e and the battery 20e shown in FIG. Further, since the fusible portion 24a has a small width, this portion tends to particularly affect radio waves. However, since the fusible portion 24a, which is relatively narrow in width, is positioned so that the direction in which the fusible portion 24a extends is substantially perpendicular to the direction in which the antenna 40 extends, radio waves are less affected by the fusible portion 24a. Therefore, in the mobile phone 1f, compared to the mobile phone 1e according to the fifth embodiment, it is possible to prevent the radio wave from being modulated and to prevent the sound quality from deteriorating.

(Embodiment 7) FIG. 9 is a diagram for illustrating the structure of a portable telephone and a battery according to Embodiment 7 of the present invention. Referring to FIG. 9, a mobile phone 1g according to a seventh embodiment of the present invention has a structure similar to that of the seventh embodiment of the present invention.
20 g of the battery according to. The structure of the battery 20g is shown in FIG.
Is different from the battery 20e indicated by. That is, in the battery 20g, the wiring layer 24 and the PTC element 25 are sequentially connected to the negative terminal 23 in that the PTC element 25 and the wiring layer having the fusible portion 24a are sequentially connected to the negative terminal 23. This is different from the battery 20e shown in FIG.

The battery 20g thus configured has the same effect as the battery 20e shown in FIG.

The portable telephone 1g having the battery 20g has the same effect as the portable telephone 1e shown in FIG.

(Embodiment 8) FIG. 10 is a diagram for illustrating a structure of a portable telephone and a battery according to an embodiment 8 of the present invention. Referring to FIG. 10, a mobile phone 1h according to the eighth embodiment of the present invention has a battery 20h according to the eighth embodiment of the present invention. The structure of the battery 20h is different from the battery 20g shown in FIG. That is, the battery 20h differs from the battery 20g shown in FIG. 10 in that the fusible portion 24a of the wiring layer 24 is positioned so as to be substantially orthogonal to the direction in which the antenna 40 extends (the direction indicated by the arrow 40a). The PTC element 25 and the wiring portion 24b are connected to the wiring layer 3
2 are connected.

The battery 20h thus configured has the same effect as the battery 20g shown in FIG.

Further, the portable telephone 1 constructed as described above
h and the battery 20h have the same effects as the mobile phone 1g and the battery 20g shown in FIG. Further, the direction in which the relatively narrow fusible portion 24a extends is the antenna 40
Is perpendicular to the direction in which the antenna 40 extends, so that the fusible portion 24a does not affect radio waves transmitted and received by the antenna 40. As a result, the radio wave is not modulated, and it is possible to prevent a decrease in sound quality.

(Embodiment 9) FIG. 11 is a diagram for illustrating a structure of a mobile phone and a battery according to Embodiment 9 of the present invention. Referring to FIG. 11, a mobile phone 1i according to the ninth embodiment of the present invention has a battery 20i according to the ninth embodiment of the present invention. The structure of the battery 20i is different from the battery 20a shown in FIG. That is, the battery 20i
Then, the PTC element is connected to the positive terminal 22, and the wiring layer 24 having the fusible portion 24 a is connected to the negative terminal 23.
2 is different from the battery 20a in which both the PTC element and the wiring layer 24 having the fusible portion 24a in the positive electrode terminal 22 are connected. The PTC element 25 is connected to the main circuit 30 by a wiring layer 31.

The battery 20i thus configured has the same effect as the battery 20a shown in FIG.

Further, a portable telephone 1i provided with a battery 20i
In this case, the PTC element is connected to one electrode terminal, and the fusible portion is connected to the other electrode terminal. The distance between the positive electrode terminal 30 and the positive electrode terminal 22 and the negative electrode terminal 23 can be reduced. for that reason,
There is an effect that the printed circuit board 10 can be reduced in size and the mobile phone 1i can be reduced in weight.

(Embodiment 10) FIG. 12 is a diagram for illustrating the structure of a portable telephone and a battery according to Embodiment 10 of the present invention. Referring to FIG. 12, a mobile phone 1i according to the tenth embodiment of the present invention has a battery 20j according to the tenth embodiment of the present invention. Battery 20j
Is different from the battery 20i shown in FIG. That is,
Battery 20j differs from battery 20i shown in FIG. 11 in that the direction in which fusible portion 24a extends is positioned so as to be substantially orthogonal to the direction in which antenna 40 extends (the direction indicated by arrow 40a).

The mobile phone 1j and the battery 20j thus configured have the same effects as the mobile phone 1i and the battery 20i shown in FIG.

Further, the fusible portion 24 having a relatively narrow width
Since the direction in which “a” extends is substantially orthogonal to the direction in which the antenna 40 extends, radio waves transmitted and received by the antenna 40 are less affected by the fusible portion 24 a. Therefore, it is possible to prevent a problem such as deterioration of sound quality without modulating radio waves.

(Embodiment 11) FIG. 13 is a diagram for illustrating a structure of a mobile phone and a battery according to an embodiment 11 of the present invention. Referring to FIG. 13, a mobile phone 1k according to the eleventh embodiment of the present invention has a battery 20k according to the eleventh embodiment of the present invention. Battery 20k
Is different from the battery 20i shown in FIG. That is, in the battery 20k, the wiring layer 24 having the fusible portion 24a is connected to the positive terminal 22 via the wiring layer 31, and the PTC element is connected to the negative terminal 23. This is different from the battery 20j shown in FIG. 11 in which the connected PTC element 25 is connected to the positive electrode terminal 22. The PTC element is connected to the main circuit 30 via the wiring layer 32.

The battery 20k thus configured has the same effect as the battery 20j shown in FIG. Further, the mobile phone 1k provided with the battery 20k has the same effect as the mobile phone 1j shown in FIG.

(Twelfth Embodiment) FIG. 14 is a diagram for illustrating a structure of a mobile phone and a battery according to a twelfth embodiment of the present invention. Referring to FIG. 14, a mobile phone 1m according to the twelfth embodiment of the present invention has a battery 20m according to the fourteenth embodiment of the present invention. Battery 20m
Is different from the battery 20k shown in FIG. In other words, in the battery 20m, the wiring layer 24 is positioned such that the direction in which the relatively narrow fusible portion 24a extends is substantially orthogonal to the direction in which the antenna 40 extends (the direction indicated by the arrow 40a).

In the portable telephone 1m and the battery 20m thus configured, first, the portable telephone 1k shown in FIG.
And the same effect as the battery 20k. Further, since the direction in which the fusible portion 24a extends is substantially perpendicular to the direction in which the antenna 40 extends, the radio waves transmitted and received by the antenna 40 are less affected by the fusible portion 24a. Therefore, there is no problem such as deterioration of sound quality due to no modulation of radio waves.

(Thirteenth Embodiment) FIG. 15 is a diagram for illustrating a structure of a mobile phone and a battery according to a thirteenth embodiment of the present invention. Referring to FIG. 15, a mobile phone 1n according to the thirteenth embodiment of the present invention has a battery 20n according to the thirteenth embodiment of the present invention. Battery 20n
Is different from the battery 20a shown in FIG. That is, battery 2
0n is obtained by attaching the wiring layer 24 having the fusible portion 24a to the negative electrode terminal 23 of the battery 20a shown in FIG.
Therefore, in the battery 20n, the wiring layer 24 having the fusible portion 24a is connected to the positive terminal 22, and the wiring layer 24 having the fusible portion 24a is connected to the negative terminal 23.

The portable telephone 1n and the battery 20n thus configured have the same effects as the portable telephone 1a and the battery 20a shown in FIG. Further, a wiring layer 24 having a fusible portion 24a is connected to both the positive terminal 22 and the negative terminal 23. Therefore, the fusible portion 24 of either one of the wiring layers 24 depends on a predetermined current value.
a does not melt, the other fusible portion 24
a melts. As a result, either fusible portion 2
Since 4a is reliably melted, the reliability of the apparatus is further improved.

(Embodiment 14) FIG. 16 is a diagram for illustrating a structure of a mobile phone and a battery according to Embodiment 14 of the present invention. Referring to FIG. 16, a mobile phone 1p according to the fourteenth embodiment of the present invention has a battery 20p according to the fourteenth embodiment of the present invention. Battery 20p
Is different from the battery 20n shown in FIG. That is, the wiring layer 24 having the fusible portion 24a is connected to the positive electrode terminal 22 of the battery 20p. The fusible portion 24a is substantially perpendicular to the direction in which the antenna 40 extends (the direction indicated by the arrow 40a). Further, a PTC element 25 is connected to the negative terminal 23. A wiring layer 24 having a fusible portion 24a is connected to the PTC element 25. Fusible part 24a
Is substantially orthogonal to the direction in which the antenna 40 extends (arrow 40a).

In the portable telephone 1p and the battery 20p thus configured, first, the portable telephone 1n shown in FIG.
And the same effect as the battery 20n. Furthermore, since the direction in which the two fusible portions 24a extend is substantially orthogonal to the direction in which the antenna 40 extends, radio waves transmitted and received by the antenna 40 are not affected by the fusible portion 24a.
As a result, the radio waves are not modulated, so that problems such as deterioration of sound quality do not occur.

(Embodiment 15) FIG. 17 is a diagram for illustrating a structure of a mobile phone and a battery according to Embodiment 15 of the present invention. Referring to FIG. 17, mobile phone 101a according to the fifteenth embodiment of the present invention has battery 120a according to the fifteenth embodiment of the present invention. The battery 120a includes a battery core 21 similar to the battery 20a of FIG.
It has a negative electrode terminal 23 and a laminate film 26.
A positive electrode terminal 122 made of an aluminum alloy is connected to the battery core 21. The laminated film 26 covers a part of the positive electrode terminal 122 and the laminated film 26 does not cover the other part. The portion of the positive electrode terminal 22 that is not covered with the laminate film 26 has a relatively narrow fusible portion 122a and a relatively wide electrode portion 12a.
2b are formed. The fusible portion 122a is configured to melt and cut when the value of the current flowing through the positive electrode terminal 122 exceeds a predetermined value.

An electrode portion 122b is formed so as to be connected to the fusible portion 122a. The width of the electrode portion 122b is substantially the same as the width of the negative electrode terminal 23. Positive terminal 122
Are electrically connected to the PTC element by the wiring layer 31. The PTC element is connected to the printed circuit board 10.
The negative electrode terminal 23 is electrically connected to the main circuit 30 by a wiring layer 32.

FIG. 18 is a sectional view of each part of the positive electrode terminal shown in FIG. FIG. 18A is a diagram showing a cross section according to one aspect viewed along line AA in FIG. FIG. 18B is a diagram illustrating a cross section viewed along line BB in FIG. 17. (C) of FIG. 18 corresponds to AA in FIG.
FIG. 4 shows a cross-section according to another aspect viewed along a line.
Referring to FIG. 18A, a fusible portion 122a is provided above printed circuit board. Fusible part 12
2a has a thickness T ₂ of about 100 μm and a width W ₃ of about 50 μm.
m. Referring to FIG. 18B, electrode portion 122
The thickness b is T ₂ and the width W ₄ is about 3 mm. In addition,
The direction in which the fusible portion 122a extends and the direction in which the antenna 40 extends may be substantially orthogonal.

Referring to FIG. 18C, fusible portion 1
A solder layer 127 is formed on the electrode portion 122a.
It is not necessary to form the solder layer 127 on b. Further, the solder layer 127 may be formed on both the fusible portion 122a and the electrode portion 122b. Furthermore, the fusible part
The solder layer may be formed on the electrode portion 122b without forming the solder layer on the electrode portion 22a. The cross section perpendicular to the cross sections shown in FIGS. 18A and 18B is similar to the cross section shown in FIG. 3C.

The portable wireless device 101a thus configured
And the battery 120a, first, P
Since the TC element 24 and the fusible portion 122a are formed, it has the same safety as the mobile phone 1a and the battery 20a shown in FIG.

Further, since the fusible portion 122a is exposed from the laminate film 26, a conductive substance such as an electrolyte in the laminate film 26 is exposed to the fusible portion 12a.
Isolated from 2a. Therefore, when the fusible portion 122a is melted and cut, the current flowing through the positive electrode terminal 122 can be reliably shut off, and the reliability increases. Further, since the fusible portion 122a can be formed in the same manner as the formation of the positive electrode terminal 122, an increase in manufacturing cost can be suppressed. Further, compared to the case where the fusible portion 122a is provided in the laminate film 26,
Can be reduced in size.

Further, as compared with the case where a fusible portion is provided between the electrode terminal and the main body circuit 30, the electrode terminal and the main body circuit
Since the distance between them is small, the printed circuit board 10 can be downsized. As a result, the mobile phone 101a
Can be reduced in weight.

(Embodiment 16) FIG. 19 is a diagram for illustrating a structure of a mobile phone and a battery according to Embodiment 16 of the present invention. Referring to FIG. 19, a mobile phone 101b according to the sixteenth embodiment of the present invention has a battery 120b according to the sixteenth embodiment of the present invention. The structure of the battery 120b is different from the battery 120a shown in FIG.
That is, in the battery 120b, the negative electrode terminal 23 is connected to the wiring layer 32.
17 is different from the battery 120a shown in FIG. 17 in which the PTC element 25 is connected to the positive electrode terminal 22 in that the PTC element 25 is connected via the.

The mobile phone 101b thus configured
First, the battery 120b has the same effect as the mobile phone 101a and the battery 120a shown in FIG.

Also, the mobile phone 1 having the battery 120b
01b has the same effect as the mobile phone 101a shown in FIG.

(Embodiment 17) FIG. 20 is a diagram for illustrating a structure of a mobile phone and a battery according to Embodiment 17 of the present invention. Referring to FIG. 20, a mobile phone 101c according to the seventeenth embodiment of the present invention has a battery 120c according to the seventeenth embodiment of the present invention. Battery 120c has the same structure as battery 20a shown in FIG.
1, a positive electrode terminal 22 and a laminate film 26. The negative electrode terminal 123 is connected to the battery core 21.
A part of the negative electrode terminal 123 is covered with the laminate film 26, but the other part is not covered with the laminate film 26. A fusible portion 123a and an electrode portion 123b are formed in a portion of the negative electrode terminal 123 that is not covered with the laminate film 26. Fusible part 123
The width of a is relatively small, and the width of the electrode portion 123b is relatively wide. The fusible portion 123a and the electrode portion 123b are made of aluminum foil. The fusible portion 12
3a and the electrode portion 123b have substantially the same thickness,
The fusible portion 123a has a relatively small cross-sectional area, and the electrode portion 123b has a relatively large cross-sectional area. The negative terminal 123 is connected to the PTC element 25 via the wiring layer 32. The PTC element 25 is connected to the main circuit 30. Positive electrode terminal 22 is connected to main circuit 30 by wiring layer 31.

In the battery 120c thus configured,
First, there is an effect similar to that of the battery 120a shown in FIG.
Further, the mobile phone 101c provided with the battery 120c
In this case, there is an effect similar to that of the mobile phone 101a shown in FIG.

(Embodiment 18) FIG. 21 is a diagram for illustrating a structure of a mobile phone and a battery according to an embodiment 18 of the invention. Referring to FIG. 21, a mobile phone 101d according to the eighteenth embodiment of the present invention has a battery 120d according to the eighteenth embodiment of the present invention. The structure of the battery 120d is different from that of the battery 120c shown in FIG.
That is, in the battery 120d, the wiring layer 31 is connected to the positive electrode terminal 22.
20 is different from the battery 120c shown in FIG. 20 in which the PTC element 25 is connected to the negative terminal 123.

In the battery 120d thus configured,
First, there is an effect similar to that of the battery 120c shown in FIG.
The mobile phone 101d provided with the battery 120d has the same effect as the mobile phone 101c shown in FIG.

(Embodiment 19) FIG. 22 is a diagram for describing a structure of a mobile phone and a battery according to Embodiment 19 of the present invention. Referring to FIG. 22, a mobile phone 101e according to the nineteenth embodiment of the present invention has a battery 120e according to the nineteenth embodiment of the present invention. Battery 1
20e has a positive terminal 122 and a negative terminal 123. That is, the battery 120e is the battery 12e shown in FIG.
The negative electrode terminal 0a is replaced with a negative electrode terminal 123 shown in FIG. Therefore, the fusible portions 122a and 123a are formed on the positive electrode terminal 122 and the negative electrode terminal 123.

The portable telephone 101e thus configured
And the battery 120e, first, the battery 12 shown in FIG.
0a has the same effect. Further, both the fusible portions 122a and 1
23a, the current flowing through the positive terminal 122 and the negative terminal 123 becomes a predetermined value.
Even if either one of the fusible portions 122a and 123a does not melt, the other fusible portions 122a and 123a can melt and interrupt the current. Therefore, the reliability is improved and the safety is further improved.

(Embodiment 20) FIG. 23 is a diagram of a battery according to Embodiment 20 of the present invention. FIG. 23A is a top view of a battery according to Embodiment 20 of the present invention, FIG. 23B is a bottom view, and FIG.
It is a figure which shows the cross section seen along CC line | wire in 3 (A). Referring to FIG. 23A, a battery 170a according to Embodiment 20 of the present invention includes a battery core 21, a positive electrode terminal 22, a negative electrode terminal 23, and a laminate film 26.
, An insulating substrate 110, a positive terminal plate 132, and a negative terminal plate 133. The battery core 21, the positive electrode terminal 22, the negative electrode terminal 23 and the laminate film 26 are the same as the battery core 21, the positive electrode terminal 22, the negative electrode terminal 23 and the laminate film 26 shown in FIG. Positive terminal 2
2 and the insulating substrate 110 so as to contact the negative electrode terminal 23.
Is provided. A conductive positive electrode terminal plate 132 and a negative electrode terminal plate 133 are fixed on the insulating substrate 110. Each of the positive electrode terminal plate 132 and the negative electrode terminal plate 133 has substantially the same size, and both have a rectangular shape. These positive electrode terminal plate 132 and negative electrode terminal plate 133
Is in direct contact with a contact pin of a mobile phone or the like. The positive terminal plate 132 is positioned on the positive terminal 22, and the negative terminal plate 133 is positioned on the negative terminal 23.

Referring to FIG. 23B, battery 170a
An insulating substrate 111 is attached to the lower surface of the substrate so as to contact the positive terminal 22 and the negative terminal 23. On the insulating substrate 111, a wiring layer 124 and a PTC element 125 are provided. The wiring layer 124 and the PTC element 125 are connected. The wiring layer 124 has a relatively small width fusible portion 124a and a relatively wide wiring portion 124b. The fusible portion 124a has a relatively small cross-sectional area, and the wiring portion 124b has a relatively large cross-sectional area. The fusible portion 124a and the wiring portion 124b have substantially the same thickness. Meltable portion 124a and wiring portion 124b
Are each made of copper. FIG. 23C shows that the fusible portion 124a of the wiring layer 124 extends so as to be substantially perpendicular to the direction in which the positive terminal 22 and the negative terminal 23 extend.
With reference to, the positive terminal 22 and the negative terminal 23 are formed so as to be embedded in the insulating substrate 111. An insulating substrate 110 is stacked on the insulating substrate 111. Under the insulating substrate 111, the wiring layer 124 and the PTC element 12
5 are provided. A positive electrode terminal plate 132 and a negative electrode terminal plate 133 are fixed on the insulating substrate 110, respectively.
The positive electrode terminal 22 is connected to a wiring portion 124b at one end of the wiring layer 124 by a lead wire 141. Wiring layer 12
4 is connected to one end of the PTC element 125. The other end of the PTC element 125 is connected to a positive terminal plate 132 by a lead wire 142. Negative electrode terminal plate 23 is connected to negative electrode terminal plate 133 by lead wire 143.

When using the battery constructed as described above, the positive terminal plate 132 and the negative terminal plate 133 are respectively connected to the circuit of the portable information terminal. Thereby, the battery 1
A current can be supplied to the portable information terminal from 70a. To perform charging, the positive terminal plate 132 is connected to the positive terminal of the power source for charging, and the negative terminal plate 133 is connected to the negative terminal of the power source for charging. Thereby, charging can be performed.

In the battery 170a thus configured,
First, when a large current flows through the PTC element 125 due to a short circuit or the like, the temperature of the PTC element 125 increases, and the resistance of the PTC element 125 increases. Thereby, the PTC element 1
25 can be reduced. Furthermore, if a large current flows due to overcharging or reverse charging, PT
The C element 125 may cause dielectric breakdown. Even in this case, the fusible portion 124a of the wiring layer 124 is melted and cut. Thereby, the current can be cut off.

The fusible portion 124a and the PTC element 125 are not covered with the laminate film 26 but are exposed from the laminate film 26. This allows
Since there is no conductive substance such as an electrolyte near the fusible portion 124a, the current can be reliably shut off when the fusible portion 124a is melted and cut.

Further, since the fusible portion 124a of the fusible portion 124a and the wiring portion 124b have the same material and the same thickness, the fusible portion 124a can be manufactured at the same time when the wiring portion 124b is manufactured. Further, since the fusible portion 124a of the wiring layer 124 extends so as to be substantially orthogonal to the direction in which the positive electrode terminal 22 and the negative electrode terminal 23 extend, the size of the battery 170a can be reduced.

(Embodiment 21) FIG. 24 is a sectional view of a battery according to Embodiment 21 of the present invention. Referring to FIG. 24, in battery 170b, positive electrode terminal 22 is sequentially connected with P
The fusible portion 124 of the TC element 125 and the wiring layer 124
23 is different from the battery 170a shown in FIG. 23 in which the fusible portion 124a and the PTC element 125 are connected to the positive electrode terminal 22 in that order. The positive terminal 22
And the PTC element 125 are connected by a lead wire 141, and the positive terminal plate 132 and the wiring portion 124 of the wiring layer 124 are connected.
b is connected by a lead wire 142. Note that a top view and a bottom view of the battery 170b illustrated in FIG. 24 are similar to those illustrated in FIGS. 23A and 23B.

The battery 170b thus configured has the same effect as the battery 170a shown in FIG.

(Embodiment 22) FIG. 25 is a sectional view of a battery according to Embodiment 22 of the present invention. Referring to FIG. 25, a battery 17 according to a twenty-second embodiment of the present invention will be described.
0c, the wiring layer 124 and the PT
23 is different from the battery 170a shown in FIG. 23 in which the wiring layer 124 and the PTC element 125 are sequentially connected to the positive electrode terminal 22 in that the C element 125 is connected. The top view and the bottom view of the battery 170c are the same as the top view and the bottom view shown in FIGS. The positive electrode terminal 22 and the positive electrode terminal plate 132 are connected by a lead wire 141. Negative electrode terminal 23 and wiring portion 124b of wiring layer 124
Are connected by a lead wire 143. The PTC element 125 and the negative terminal plate 133 are connected by a lead wire 144.

In the battery 170a thus configured,
There is an effect similar to that of the battery 170a shown in FIG.

(Embodiment 23) FIG. 26 is a sectional view of a battery according to Embodiment 23 of the present invention. Referring to FIG. 26, a battery 17 according to a twenty-third embodiment of the present invention
0d, the PTC element 125 and the fusible portion 124a of the wiring layer 124 are sequentially connected to the negative terminal 23.
Battery 170c shown in FIG. 25 to which element 125 is connected
And different. Negative electrode terminal 23 and PTC element 125 are connected by lead wire 143. Electrode part 1 of wiring layer 124
24b and the negative electrode terminal plate 133 are connected by a lead wire 144.

In the battery 170d thus configured,
There is an effect similar to that of the battery 170a shown in FIG.

(Embodiment 24) FIG. 27 shows a battery according to Embodiment 24 of the present invention. (A) of FIG. 27 is a top view of a battery according to the twenty-seventh embodiment of the present invention, (B) is a bottom view, and (C) is a CC line in (A) of FIG. FIG. 4 is a diagram showing a cross section viewed along the line.

Referring to FIG. 27A, battery 170e
Is similar to the top view of the battery 170a shown in FIG.

Referring to FIG. 27B, battery 170e
Now, the wiring layer 124 and the PTC element 1 on the insulating substrate 111
23 is different from the battery 170a in FIG. 23 in which the PTC element 125 and the wiring layer 124 are directly connected on the insulating substrate 111 in that they are not in direct contact with each other. In addition, the positive electrode terminal 22
The PTC element 125 is positioned so as to face the PTC element 125, and the wiring layer 124 is positioned so as to face the positive terminal 22 at a point where the wiring layer 124 is positioned so as to face the negative terminal 23. Are different from the battery 170a shown in FIG.

Referring to FIG. 27C, the positive electrode terminal 22
Is connected to the PTC element 125 by a lead wire 141. The PTC element 125 is connected to a positive terminal plate 132 by a lead wire 142. The negative electrode terminal 23 is connected to the wiring portion 124 b at one end of the wiring layer 124 by the lead wire 143.
It is connected to the. Wiring portion 1 at the other end of wiring layer 124
Reference numeral 24b is connected to the negative electrode terminal plate 133 by a lead wire 144.

With the battery 170e thus configured,
It has the same effect as the battery 170a. (Embodiment 25)
FIG. 28 shows a battery according to the twenty-fifth embodiment of the invention. (A) in FIG. 25 is a top view of the battery according to the twenty-fifth embodiment of the invention, (B) is a bottom view, and (C) is a C- cell in FIG. 28 (A). It is a figure showing the section seen along the C line. Referring to FIG. 28A,
The top view of the battery 170f is the battery 1 shown in FIG.
This is similar to the top view of 70a.

Referring to FIG. 28B, battery 170f
Then, the wiring layer 124 is positioned so as to face the positive terminal 22, and the PTC element 125 is positioned so as to face the negative terminal 23.
27, in which the PTC element 125 is located so as to face the positive terminal 22 and the wiring layer 124 is located so as to face the negative terminal 23.
0e.

Referring to FIG. 28C, the positive electrode terminal 22
Is connected to a wiring portion 124b at one end of the wiring layer 124 by a lead wire 141. The wiring portion 124 b at the other end of the wiring layer 124 is connected to the positive electrode terminal plate 132 by a lead wire 142.

The negative terminal 23 is connected to the lead wire 143 by PT.
Connected to C element 125. PTC element 125 is connected to negative electrode terminal plate 133 by lead wire 144.

With the battery 170f configured as described above,
There is an effect similar to that of the battery 170a shown in FIG.

(Embodiment 26) FIG. 29 shows a battery according to Embodiment 26 of the present invention. FIG. 29A is a bottom view of the battery according to Embodiment 26 of the present invention, and FIG. 29B is a bottom view of FIG.
It is a figure which shows the cross section seen along the -B line.

Referring to FIG. 29A, a battery 170g according to the twenty-sixth embodiment of the present invention is different from battery 120a shown in FIG. 17 in battery core 21, negative electrode terminal 23, laminated film 26 and positive electrode terminal 122. Having. Further, the insulating substrate 111 and the PTC element 125 are similar to the insulating substrate 111 and the PTC element 125 shown in FIG.

Referring to FIG. 29B, the positive electrode terminal 12
2 is connected to the PTC element 125 by a lead wire 141. The PTC element 125 is connected to a positive terminal plate 132 by a lead wire 142. The negative terminal 23 is connected to the negative terminal plate 133 by a lead wire 143.

[0130] In the battery 170g thus configured,
It has the same effect as the battery 170a shown in FIG. Further, since the fusible portion 122a is incorporated in the positive electrode terminal 122, there is an effect that the battery can be made thinner than when the fusible portion is formed on the insulating substrate 111.

(Embodiment 27) FIG. 30 is a sectional view of a battery according to Embodiment 27 of the present invention. Referring to FIG. 30, battery 17 according to the twenty-seventh embodiment of the present invention is shown.
0h, the PTC element 125 is connected to the negative terminal 23 via the lead wire 143, and the positive terminal 122
Battery 17 shown in FIG. 29 to which TC element 125 is connected
Different from 0g. PTC element 125 is connected to negative electrode terminal plate 133 by lead wire 144. The bottom view of the battery 170h shown in FIG. 30 is the same as that shown in FIG.

With the battery 170h configured as described above,
There is an effect similar to that of the battery 170g shown in FIG.

(Embodiment 28) FIG. 31 shows a battery according to an embodiment 28 of the present invention. FIG. 28A is a bottom view of the battery according to the twenty-eighth embodiment of the present invention, and FIG.
It is a figure which shows the cross section seen along the -B line.

Referring to FIG. 31A, a battery 170i according to the twenty-eighth embodiment of the present invention has the same battery core 21, positive electrode terminal 22, laminated film 26, and negative electrode as battery 120e shown in FIG. It has a terminal 123, an insulating substrate 111 similar to the battery 170a of FIG. 23, and a PTC element 125.

Referring to FIG. 31B, the positive electrode terminal 22
Is connected to the PTC element 125 by a lead wire 141. The PTC element 125 is connected to a positive terminal plate 132 by a lead wire 142. The negative terminal 123 is connected to the negative terminal plate 133 by a lead wire 143.

In the battery 170i thus configured,
There is an effect similar to that of the battery 170g shown in FIG. Further, since the fusible portion 123a is incorporated in the negative electrode terminal 123, there is an effect that the battery can be made thinner than when the fusible portion is formed on the insulating substrate 111.

(Embodiment 29) FIG. 32 is a sectional view of a battery according to Embodiment 29 of the present invention. Referring to FIG. 29, a battery 17 according to a twenty-ninth embodiment of the present invention is shown.
0j, the PTC element 125 is connected to the negative terminal 123 by the lead wire 143.
Battery 1 shown in FIG.
70i. In battery 170j, positive electrode terminal 22 is connected to positive electrode terminal plate 132 by lead wire 141. The negative terminal 123 is connected to the PTC element 125 by the lead wire 143.
Connected to. PTC element 125 is connected to negative electrode terminal plate 133 by lead wire 144.

In the battery 170j thus configured,
There is an effect similar to that of the battery 170i shown in FIG.

(Embodiment 30) FIG. 33 is a bottom view of a battery according to an embodiment 30 of the invention. Referring to FIG. 33, a battery 17 according to a thirtieth embodiment of the present invention is shown.
0k is a combination of the battery 170g shown in FIG. 29A and the negative electrode terminal 123 shown in FIG. As a method for connecting the positive electrode terminal 122, the negative electrode terminal 123, and the PTC element 125, the connection methods shown in FIGS. Although not shown in FIG. 33, the positive terminal 122 is connected to the positive terminal plate, and the negative terminal 123 is connected to the negative terminal plate.

In the battery 170k thus configured,
First, there is an effect similar to that of the battery 170g shown in FIG.
Further, fusible portions 122a and 123a are formed on the positive terminal 122 and the negative terminal 123, respectively.
Therefore, even when the current flowing through the positive electrode terminal 122 and the negative electrode terminal 123 exceeds a predetermined value and one of the fusible portions does not melt, the other fusible portion is melted, so that safety is further improved.

(Embodiment 31) FIG. 34 is a side view of a battery according to an embodiment 31 of the present invention. Referring to FIG. 34, a battery 17 according to a thirty-first embodiment of the present invention.
0 m denotes a metal can 201, a positive electrode terminal 202, a PTC element 203, a wiring layer 204, and lead wires 211 to 213.
And A PTC element 203 and a wiring layer 204 are formed on a metal can 201 with an insulating layer (not shown) as an insulating substrate interposed. The lead wire 211 connects the metal can 201 and the PTC element 203. Wiring layer 20
4 and the portable information terminal are connected by a lead wire 212, and the positive terminal 202 and the portable information terminal are connected by a lead wire 213.

The metal can 201 is made of iron.
01a, a bottom surface 201b and an upper surface 201c. The metal can 201 has a rectangular parallelepiped shape, and is filled with a battery core (not shown) as a power generation element. Side 2
01a is a cylindrical shape, and its opening is
c and the bottom surface 201b. The bottom surface 201b functions as a negative electrode terminal of the battery. The PTC element 203 is fixed to the side surface 201a. PTC
The element 203 is connected to the bottom surface 201b of the metal can 201 by a lead wire 211. The PTC element 203 is connected to the wiring layer 204. The wiring layer 204 includes a wiring portion 2
04b and a fusible portion 204a. The wiring portion 204b has a relatively large cross-sectional area and a relatively wide width. On the other hand, the fusible portion 204a
It has a relatively small cross-sectional area and a relatively small width.

The wiring portion 204b and the fusible portion 204
a are both made of the same material (copper) and have the same thickness.

The wiring portion 204b provided at one end of the wiring layer 204 is connected to the PTC element 203, and the wiring portion 204b provided at the other end is connected to the portable information terminal via the lead wire 212.

FIG. 35 is a side view of the battery viewed from the direction indicated by arrow A in FIG. Referring to FIG. 35, side surface 201a of the metal can has a substantially rectangular shape. Side 201
The PTC element 203 and the wiring layer 204 are mounted on a.

[0146] With the battery 170m configured as described above,
First, there is an effect similar to that of the battery shown in FIG. Furthermore, since the battery core is covered with the metal can 201, the battery is not deformed even when an external pressure is applied, and there is an effect that a contact failure or the like does not occur.

(Embodiment 32) FIG. 36 is a diagram for illustrating a structure of a portable telephone and a battery according to an embodiment 32 of the present invention. Referring to FIG. 36, a mobile phone 1r according to the thirty-second embodiment of the present invention has a battery 20r according to the thirty-second embodiment of the present invention. Battery 20r
Is different from the battery 20a shown in FIG. That is, in the battery 20r, the positive electrode terminal 22 has two fusible portions 2
4A is different from the battery 20 a in which one fusible portion 24 a is connected to the positive electrode terminal 22. The wiring layer 24 includes two fusible portions 24a. The two fusible portions 24a are connected to the positive electrode terminal 22 in parallel with each other. The wiring layer 24 of the battery 20r has the same dimensions as the wiring layer 24 shown in FIG. Each fusible part 2
The fusible portion 24a melts and cuts when the current flowing through 4a becomes approximately 8A, that is, when the current flowing through positive terminal 22 becomes approximately 16A.

The battery 20c has the same effect as the battery 20a shown in FIG. The fusible portion 24a
By setting the number, the upper limit value of the current flowing through the positive electrode terminal 22 can be set.

Further, such a portable telephone 1c has the same effect as the portable telephone 1a shown in FIG.

(Thirty-third Embodiment) FIG. 37 is a view illustrating a structure of a mobile phone and a battery according to a thirty-third embodiment of the present invention. FIG. 37A shows Embodiment 3
FIG. 37B is a diagram for explaining the structure of the mobile phone and the battery according to one aspect of the third embodiment, and FIG.
FIG. 11 is a diagram for explaining a structure of a mobile phone and a battery according to another aspect of No. 3; Referring to FIG. 37A, a mobile phone 1s according to the thirty-third embodiment of the present invention has a battery 20s according to the thirty-third embodiment of the present invention. The structure of the battery 20s is different from the battery 20i shown in FIG. That is, in the battery 20s, the fusible portion 24a of the wiring layer 24
In that the fusible portion 24
a is different from the battery 20i having a linear shape.

Referring to FIG. 37B, a portable telephone 1t according to the thirty-third embodiment of the present invention has a battery 20t according to the thirty-third embodiment of the present invention. Battery 20t
Is different from the battery 20i shown in FIG. That is,
The battery 20t differs from the battery 20i in that the fusible portion 24a of the wiring layer 24 extends in a zigzag manner in a zigzag manner.

The portable telephones 1s and 1t and the batteries 20s and 20t thus configured have the same effects as the portable telephone 1i and the battery 20i shown in FIG.

Further, since the fusible portion 24a extends in a meandering manner, the long fusible portion 24a exists in a small volume portion. Therefore, the electric resistance of the fusible portion 24a increases, and the heat generated from the fusible portion 24a is less likely to be radiated to the outside. As a result, the temperature of the fusible portion 24a tends to rise, and the fusible portion 24a
Is easily melted and cut.

Although the embodiments of the present invention have been described above, the embodiments shown here can be variously modified.

First, the material constituting the laminate film is not limited to a three-layer structure including a resin layer, an aluminum layer, and a resin layer, but may include more layers.

The material of the positive electrode terminal and the negative electrode terminal is not limited to aluminum or copper, but may be any commonly used material.

One of the positive electrode terminal and the negative electrode terminal may be electrically connected to the aluminum foil in the laminate film. Also, a mobile phone has been described as a mobile information terminal, but it may be used for a notebook computer or a video tape recorder.

Further, in the above-described embodiment, the case where a battery is used as the lithium secondary battery has been described. However, the present invention is not limited to the lithium secondary battery, and may be applied to other secondary batteries, such as a nickel cadmium battery. Good. Further, the present invention can be applied to a primary battery.

Further, Embodiments 1 to 31 and 33
In the battery shown by, the fusible portion may be connected in parallel as shown in the thirty-second embodiment. Further, the number of fusible portions is not limited to two, and can be changed as needed.

In all of the embodiments, if the wavelength of the radio wave for wireless communication is λ and the length of the fusible portion is L, the fusible portion satisfies the relationship represented by L ≦ λ / 4. May be defined.

Also, the fusible portion 24a shown in FIGS. 2 to 16 and 36, FIG. 17 to FIG.
3, the fusible portion 124a of FIG. 34, the fusible portion 124a of FIG.
a is shown in FIGS. 37A and 37B.
It may be formed so as to extend in a meandering manner as shown in FIG.

The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[0163]

According to the first to tenth and thirteenth to twentieth aspects of the present invention, a highly safe battery can be provided.

According to the invention described in claims 11, 12, 21 and 22, a highly secure portable information terminal can be provided.

[Brief description of the drawings]

FIG. 1 is a top view of a mobile phone according to Embodiment 1 of the present invention.

FIG. 2 is a diagram for describing a structure of a mobile phone and a battery according to the first embodiment of the present invention.

FIG. 3 is a cross section of each part of the battery shown in FIG.

FIG. 4 is a diagram for illustrating a structure of a mobile phone and a battery according to a second embodiment of the present invention.

FIG. 5 is a diagram for illustrating a structure of a mobile phone and a battery according to a third embodiment of the present invention.

FIG. 6 is a diagram for illustrating a structure of a mobile phone and a battery according to a fourth embodiment of the present invention.

FIG. 7 is a diagram for illustrating a structure of a mobile phone and a battery according to a fifth embodiment of the present invention.

FIG. 8 is a diagram for illustrating a structure of a mobile phone and a battery according to a sixth embodiment of the present invention.

FIG. 9 is a diagram for illustrating a structure of a mobile phone and a battery according to a seventh embodiment of the present invention.

FIG. 10 is a diagram for illustrating structures of a mobile phone and a battery according to an eighth embodiment of the present invention.

FIG. 11 is a view illustrating a structure of a mobile phone and a battery according to a ninth embodiment of the present invention.

FIG. 12 is a diagram for illustrating structures of a mobile phone and a battery according to a tenth embodiment of the present invention.

FIG. 13 is a view illustrating a structure of a mobile phone and a battery according to an eleventh embodiment of the present invention.

FIG. 14 is a view illustrating a structure of a mobile phone and a battery according to a twelfth embodiment of the present invention.

FIG. 15 is a view illustrating a structure of a mobile phone and a battery according to a thirteenth embodiment of the present invention.

FIG. 16 is a view illustrating a structure of a mobile phone and a battery according to a fourteenth embodiment of the present invention.

FIG. 17 is a view illustrating a structure of a mobile phone and a battery according to a fifteenth embodiment of the present invention.

18 is a sectional view of each part of the positive electrode terminal shown in FIG.

FIG. 19 is a view illustrating a structure of a mobile phone and a battery according to a sixteenth embodiment of the present invention.

FIG. 20 is a view illustrating a structure of a mobile phone and a battery according to a seventeenth embodiment of the present invention.

FIG. 21 is a view illustrating a structure of a mobile phone and a battery according to an eighteenth embodiment of the present invention.

FIG. 22 is a view illustrating a structure of a mobile phone and a battery according to a nineteenth embodiment of the present invention.

FIG. 23 shows a battery according to a twentieth embodiment of the present invention.

FIG. 24 is a sectional view of a battery according to a twenty-first embodiment of the present invention.

FIG. 25 is a sectional view of a battery according to a twenty-second embodiment of the present invention.

FIG. 26 is a cross sectional view of a battery according to a twenty third embodiment of the present invention.

FIG. 27 shows a battery according to Embodiment 24 of the present invention.

FIG. 28 is a diagram showing a battery according to Embodiment 25 of the present invention.

FIG. 29 is a diagram showing a battery according to Embodiment 26 of the present invention.

FIG. 30 is a sectional view of a battery according to Embodiment 27 of the present invention.

FIG. 31 shows a battery according to a twenty-eighth embodiment of the present invention.

FIG. 32 is a sectional view of a battery according to Embodiment 29 of the present invention.

FIG. 33 is a bottom view of a battery according to Embodiment 30 of the present invention.

FIG. 34 is a side view of a battery according to Embodiment 31 of the present invention.

FIG. 35 is a side view of the battery as viewed from the direction indicated by arrow A in FIG.

FIG. 36 is a view illustrating a structure of a mobile phone and a battery according to a thirty-second embodiment of the present invention.

FIG. 37 is a view illustrating a structure of a mobile phone and a battery according to Embodiment 33 of the present invention.

[Explanation of symbols]

1a to 1t, 101a to 101e Mobile phone, 10
Printed circuit boards, 20a to 20t, 120a to 120e,
170a to 170m battery, 21 battery core, 22, 1
22, 202 Positive terminal, 23, 123 Negative terminal, 2
4 wiring layer, 24a, 122a, 123a fusible portion, 25, 203 PTC element, 40 antenna, 11
0,111 insulating substrate.

Claims (22)

[Claims] A power generating element for generating electric power; a positive electrode terminal and a negative electrode terminal connected to the power generating element; an exterior member covering a part of the power generating element and the positive electrode terminal and the negative electrode terminal; A wiring layer formed on the insulating substrate so as to be electrically connected to at least one of the negative electrode terminals and having a fusible portion that melts and cuts when exceeding a predetermined current value; and at least one of the positive electrode terminal and the negative electrode terminal And a current amount control unit that is electrically connected to the power generation element and decreases a current value flowing through the power generation element as a current value flowing through the power generation element increases. Batteries that are exposed from. 2. The positive electrode terminal is connected to one of the current control means and the fusible portion, and the negative terminal is connected to the other of the current control means and the fusible portion. The battery according to claim 1. 3. The battery according to claim 1, wherein the fusible portion is connected to each of the positive terminal and the negative terminal. 4. The battery according to claim 1, wherein the fusible portion of the wiring layer and a portion other than the fusible portion of the wiring layer have substantially the same thickness. 5. The battery according to claim 1, wherein the fusible portion of the wiring layer and a portion other than the fusible portion of the wiring layer are made of the same material. 6. The wiring layer according to claim 1, wherein a fusible portion of the wiring layer has a relatively small cross-sectional area, and a portion other than the fusible portion of the wiring layer has a relatively large cross-sectional area. The battery according to claim 1. 7. The portable information terminal according to claim 1, wherein the battery is attached to the portable information terminal such that a direction in which the antenna of the portable information terminal extends and a direction in which the fusible portion extends are substantially orthogonal to each other. The battery as described. 8. The length L of the fusible portion is defined so that the wavelength λ of the radio wave for wireless communication and the length L of the fusible portion satisfy the relationship represented by L ≦ λ / 4. , Claim 1
The battery according to any one of claims 1 to 7. 9. The wiring layer includes a plurality of the fusible portions, and the plurality of fusible portions are connected to one of the positive electrode terminal and the negative electrode terminal in parallel with each other.
9. The battery according to any one of items 1 to 8. 10. The battery according to claim 1, wherein the fusible portion is formed to extend in a meandering manner. 11. A main body, an antenna attached to the main body and extending in one direction, and a battery attached to the main body, wherein the battery is connected to the power generation element for generating electric power, and the power generation element. A positive electrode terminal and a negative electrode terminal; an exterior member that covers the power generating element and a part of the positive electrode terminal and the negative electrode terminal; and an insulating member formed on an insulating substrate so as to be electrically connected to at least one of the positive electrode terminal and the negative electrode terminal. A wiring layer having a fusible portion that melts and cuts when the current value exceeds a predetermined current value, and is electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and the power generation increases as the current value flowing through the power generation element increases. A current amount control means for reducing a current value flowing through the element, wherein the wiring layer and the current amount control means are exposed from the exterior member; Antenna is substantially perpendicular to the direction in which direction said Allowed fused portion extends extending, portable information terminal. 12. A main body having a wireless communication function, a battery attached to the main body, the battery includes: a power generating element for generating electric power; a positive terminal and a negative terminal connected to the power generating element; A power generation element and an exterior member that covers a part of the positive electrode terminal and the negative electrode terminal; and a power supply element that is formed on the insulating substrate so as to be electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and that exceeds a predetermined current value. And a wiring layer having a fusible portion to be melted and cut, electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and decreasing a current value flowing through the power generation element as the current value flowing through the power generation element increases. Current amount control means, wherein the wiring layer and the current amount control means are exposed from the exterior member, and the wavelength λ of radio waves for wireless communication and the fusible Minute and the length L satisfy the relationship represented by L ≦ λ / 4, a portable information terminal. 13. A power generating element for generating electric power, a positive electrode terminal and a negative electrode terminal connected to the power generating element, an exterior member covering a part of the power generating element and the positive electrode terminal and the negative electrode terminal, And a current amount control unit electrically connected to at least one of the negative electrode terminals and reducing a current value flowing through the power generating element as a current value flowing through the power generating element increases, wherein at least one of the positive electrode terminal and the negative electrode terminal is provided. A battery having a fusible portion that melts and cuts when exceeding a predetermined current value, wherein the fusible portion and the current amount control means are exposed from the exterior member. 14. The battery according to claim 13, wherein the fusible portion is formed on each of the positive electrode terminal and the negative electrode terminal. 15. The battery according to claim 13, wherein the fusible portion and the portions of the positive electrode terminal and the negative electrode terminal other than the fusible portion have substantially the same thickness. 16. The battery according to claim 13, wherein the fusible portion and the portions of the positive electrode terminal and the negative electrode terminal other than the fusible portion are made of the same material. 17. The method according to claim 13, wherein the fusible portion has a relatively small cross-sectional area, and portions of the positive electrode terminal and the negative electrode terminal other than the fusible portion have a relatively large cross-sectional area. The battery according to claim 1. 18. The portable information terminal according to claim 13, wherein the battery is attached to the portable information terminal such that a direction in which the antenna of the portable information terminal extends and a direction in which the fusible portion extends are substantially orthogonal to each other. Batteries. 19. The length of the fusible portion is defined such that the wavelength λ of the radio wave for wireless communication and the length L of the fusible portion satisfy a relationship represented by L ≦ λ / 4. Claim 1
19. The battery according to any one of 3 to 18. 20. The fusible part according to claim 13, wherein the fusible part is formed to extend in a meandering manner.
The battery according to the item. 21. A main body, an antenna attached to the main body and extending in one direction, and a battery attached to the main body, wherein the battery is connected to the power generation element for generating electric power, and the power generation element. A positive electrode terminal and a negative electrode terminal; an exterior member that covers a part of the power generating element and the positive electrode terminal and the negative electrode terminal; and a current value that is electrically connected to at least one of the positive electrode terminal and the negative electrode terminal and that flows through the power generating element. Current amount control means for reducing a current value flowing through the power generating element as the size increases, at least one of the positive electrode terminal and the negative electrode terminal has a fusible portion that melts and cuts when a predetermined current value is exceeded, The melting portion and the current amount control means are exposed from the exterior member, and a direction in which the antenna extends and a direction in which the fusible portion extends are substantially the same. Interlinking, portable information terminals. 22. A main body having a wireless communication function, a battery attached to the main body, the battery includes: a power generating element for generating electric power; a positive terminal and a negative terminal connected to the power generating element; A power generating element and an exterior member that covers a part of the positive electrode terminal and the negative electrode terminal, and electrically connected to at least one of the positive electrode terminal and the negative electrode terminal, and flows into the power generating element as a current flowing through the power generating element increases. Current amount control means for reducing a current value, at least one of the positive electrode terminal and the negative electrode terminal has a fusible portion that melts and cuts when exceeding a predetermined current value, and the fusible portion and the current amount control means Is exposed from the exterior member, and the wavelength λ of the radio wave for wireless communication and the length L of the fusible portion satisfy a relationship represented by L ≦ λ / 4. Terminal.