JP2002184375A - Cell, and electronic device using cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cell enabled to make the size small and thin and to reduce the cost, with improved reliability of electric connection, and to provide an electronic device using the cell. SOLUTION: The electronic device comprises a case 200, a cell body 34 arranged inside the case 200 having electrode taking out parts 50, 52, lands 42, 44 arranged inside the case 200 electrically connecting the electrode taking out parts 50, 52, and a solder part 200 arranged at an opening 300 which is formed to the electrode taking out parts 50, 52 electrically and mechanically connecting the electrode taking out part 50, 52 with the lands 42, 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery and an electronic device having the battery.

[0002]

2. Description of the Related Art FIG. 22 shows an example of the structure of a conventional battery. The conventional battery 1000 has an upper case 1001, a lower case 1002, a battery main body 1003, and the like. The battery body 1003 includes an upper case 1001 and a lower case 1002.
Is housed inside. The electrode take-out portions 1004 and 1005 of the battery body 1003 are provided with tabs 10 as shown in FIG.
06 are pin-point bonded by laser light, and these tabs 1006 are soldered to a substrate 1007. The connection portion 1008 with the outside is electrically connected to the substrate 1007 by pinpoint soldering manually by an operator.

[0003]

Since the tab and the lead-out portion of the electrode are pin-point-joined, the joining strength is low. Further, since the tab is used to connect the electrode take-out portion and the substrate, it is difficult to reduce the thickness, size, and cost. Accordingly, the present invention has been made to solve the above-mentioned problems, and to provide a battery and an electronic device having the battery, which can be reduced in size and thickness, can improve the reliability of electrical connection, and can reduce the cost. The purpose is.

[0004]

According to the present invention, a case, a battery body disposed in the case and having an electrode take-out part, and the electrode take-out part of the battery body arranged in the case and having the electrode take-out part are provided. And a solder portion that is disposed in an opening formed in the electrode lead-out portion of the battery body and electrically and mechanically connects the electrode lead-out portion and the land. A battery comprising: a battery; According to the first aspect, the battery main body is disposed in the case and has an electrode extraction portion. The lands are arranged in the case and electrically connect the electrode lead-out portions of the battery body. The solder portion is arranged in an opening where the battery body is formed in the electrode extraction portion,
The electrode take-out part and the land are electrically and mechanically connected. Thereby, the electrode take-out part of the battery main body can be easily and electrically and mechanically connected to the land using the solder part. Therefore, since the electrode take-out portion and the land of the battery body can be reliably electrically and mechanically connected only by using the solder portion, the size and thickness of the battery can be reduced, and the reliability of the electrical connection can be improved. Cost can be reduced.

According to a second aspect of the present invention, in the battery according to the first aspect, the lands are formed on a substrate disposed in the case.

According to a third aspect of the present invention, in the battery according to the first aspect, the land is formed directly on the case.

According to a fourth aspect of the present invention, in the battery according to the first aspect, the solder portion is electrically and mechanically connected to the electrode take-out portion and the land by melting with a laser beam. According to the fourth aspect, the solder portion is electrically and mechanically connected between the electrode extraction portion and the land by being melted by the laser beam. Thus, only by irradiating the laser beam, the electrode take-out portion and the land can be reliably electrically and mechanically connected.

According to a fifth aspect of the present invention, in the battery according to the fourth aspect, the solder portion is a solder ball. Claim 5
By using a solder ball as the solder portion, the solder ball can be easily loaded into the opening of the electrode extraction portion.

According to a sixth aspect of the present invention, in the battery according to the first aspect, the battery has the electrode take-out portion of the positive electrode and the electrode take-out portion of the negative electrode, and the electrode take-out portion of the positive electrode comprises:
Au plating using Ni as a base is formed on an Al base. According to the sixth aspect, the reliability of the solderability can be ensured by applying Au plating on the Ni base.

The invention according to claim 7 is the battery according to claim 1, wherein the battery has the electrode take-out part of the positive electrode and the electrode take-out part of the negative electrode, and the electrode take-out part of the positive electrode comprises:
A solder layer is formed on an Al base. In claim 7,
Solder is applied to the solder plating, so that the solder wettability is naturally improved and the reliability of soldering is improved.

According to an eighth aspect of the present invention, there is provided an electronic apparatus to which a battery can be detachably mounted, wherein the battery is disposed in a case, a battery main body having an electrode extraction portion disposed in the case, and disposed in the case. And a land electrically connected to the electrode lead-out portion of the battery body, and an opening formed in the electrode lead-out portion of the battery body to electrically and mechanically connect the electrode lead-out portion and the land. And a solder portion that is electrically connected. In claim 8, the battery main body is disposed in the case and has an electrode take-out portion. The lands are arranged in the case and electrically connect the electrode lead-out portions of the battery body. The solder portion is disposed in an opening formed in the electrode take-out portion of the battery main body, and electrically and mechanically connects the electrode take-out portion and the land. Thereby, the electrode take-out part of the battery main body can be easily and electrically and mechanically connected to the land using the solder part. Therefore, the electrode take-out part and land of the battery body are
Since the electrical and mechanical connection can be reliably performed only by using the solder portion, the battery can be reduced in size and thickness, and the reliability of the electrical connection can be improved and the cost can be reduced.

According to a ninth aspect of the present invention, in the battery according to the eighth aspect, the lands are formed on a substrate disposed in the case.

According to a tenth aspect of the present invention, in the battery of the eighth aspect, the land is formed directly on the case.

According to an eleventh aspect of the present invention, in the battery according to the eighth aspect, the solder portion electrically and mechanically connects the electrode take-out portion and the land by melting with a laser beam. In the eleventh aspect, the solder portion electrically and mechanically connects the electrode take-out portion and the land by melting with the laser beam. Thus, only by irradiating the laser beam, the electrode take-out portion and the land can be reliably electrically and mechanically connected.

According to a twelfth aspect of the present invention, in the battery according to the eleventh aspect, the solder portion is a solder ball. According to the twelfth aspect, by using the solder ball as the solder portion, the solder ball can be easily loaded into the opening of the electrode extraction portion.

[0016]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limits are given, the scope of the present invention is not limited to these modes unless otherwise specified in the following description.

FIGS. 1 and 2 show a portable telephone as an example of an electronic apparatus having the battery of the present invention. A mobile phone 10 as an example of the electronic device includes a housing 12, a battery (battery) 100, a display unit 16, an antenna 14, and a speaker 2.
2, a microphone 20, an operation unit 18, and the like. Battery 10
Reference numeral 0 denotes a battery for supplying power to the mobile phone 10. The housing 12 has a front part 24 and a rear part 26. As shown in FIG. 2, a battery 100 is detachably attached to a lower portion of the rear portion 26 and to a back surface of the front portion 24. The display section 16 is a section for displaying various information, and for example, a liquid crystal display device can be used. The speaker 22 is for listening to voice, and the microphone 20 is for inputting the voice of the operator. Operation unit 18
Is a numeric keypad 18C, a button 18A for making a call
And a button 18B for hanging up the telephone.

FIG. 3 shows a structural example of the battery 100 of FIG. The battery 100 of FIG.
0, a lower case 32, a battery main body 34, a substrate 36, an electric connection portion 40, lands 42 and 44, and a label 46.

FIG. 4 shows an upper case 30, a lower case 32, a battery body (also referred to as a cell) 34, a substrate 36, and an electric connection portion 4.
0, the structures of the lands 42 and 44 are shown in an enlarged manner. The upper case 30 and the lower case 32 include a battery body 34 and a substrate 36
The material is, for example, plastic, specifically, ABS (acrylonitrile butadiene styrene), PC (polycarbonate), PC / AB
S (polycarbonate / acrylonitrile butadiene styrene), PBT (polybutylene terephthalate), P
It is made of a resin such as PS (polyphenylene sulfide) and modified PPE (polyphenylene ether).
The upper case 30 and the lower case 32 can be integrated by, for example, ultrasonic welding. The label 46 in FIG. 3 is attached to the outer surface 30B of the lower case 30, and the label 46 describes characteristics of the battery 100 and other information.

FIGS. 5A and 5B show the battery main body 34.
2 shows an example of the shape. The battery body 34 in FIG. 5 has electrode take-out portions 50 and 52. Electrode take-out part 50
Is a negative electrode, which is made of, for example, nickel, and another electrode extraction portion 52 is a positive electrode, which is made of, for example, aluminum. Battery body 34
Is a battery that can be charged and discharged many times, such as a lithium ion battery, a lithium polymer battery, or a solid polymer battery. The battery body 34 is sealed with a case.

The substrate 36 shown in FIG. 3 and FIG.
This is a substrate disposed between the lower case (also referred to as a case) 30 and the lower case (also referred to as a second case) 32. The substrate 36 is, for example, rectangular and has a protection circuit for protecting the battery body 34. , Lands 42 and 44.
The protection circuit of the substrate 36 can define an upper limit voltage during charging or a lower limit voltage during discharging for safety. The substrate 36 is made of, for example, a glass epoxy substrate, a paper phenol substrate, a flexible printed wiring board, a liquid crystal polymer substrate, a ceramic substrate, or the like. Lands 42 and 44 are formed on one end and the other end of the substrate 36 shown in FIGS. The lands 42 and 44 are made of, for example, a conductive metal material,
For example, it is made of Cu plated with solder or Ni plated with Au. The land 42 in FIG. 3 is located on the substrate 36 at a position corresponding to the electrode lead-out portion 50, and the land 44 is located on the substrate 36 at a position corresponding to the electrode lead-out portion 52.

As shown in FIGS. 6 and 7, the electrode lead-out portion 50 is connected to the land 42 of the substrate 36, and the electrode lead-out portion 52 is electrically connected to the land 44 of the substrate 36.

FIG. 7 shows a substrate 36, a battery body (cell) 3
FIG. 8 is a rear view of FIG. FIG. 9 shows an upper case 30 and a lower case 32, an electric connection portion 40, a substrate 36, a battery body 34, and the like. The upper case 30 is also called an upper case, and the lower case 32 is also called a lower case.

FIG. 10 shows an example of a state in which the upper case 30, the lower case 32, the electric connection portion 40 and the like are assembled and completed. A battery body 34 is housed in the upper case 30 and the lower case 32. The upper case 30 and the lower case 32 constitute a case 200, in which the substrate 36 and the battery body 34 shown in FIG. 3 and FIG. I have. The one end 201 side of the case 200 is provided with an electric connection portion arrangement portion 202. The electric connection portion arrangement portion 202 is a portion where the electric connection portion is exposed and arranged, and is a part of the case 200. In the example of FIG. 10, the electric connection portion arrangement portion 202 is a rectangular shape viewed from the direction of E, and is a concave portion having a depth d. This recess-shaped electric connection portion arrangement portion 202
Is located approximately at the center of the center line CL of the case 200. Therefore, both sides of the case 200 are convex portions 203 as compared with the electric connection portion arrangement portion 202.

The surface 40R and the surface 40S of the electric connection portion 40
The surface 204 of the electrical connection arrangement part 202 and another surface 2
At 05, they are exposed flush. Characteristically, the thickness D of the electric connection portion arrangement portion 202 is formed to be smaller than the thickness D1 of the other portion 206 of the case 200 other than the electric connection portion arrangement portion 202. Case 2
The battery main body 34 is housed in the other portion 206 of 00. The electric connection part arrangement portion 202 accommodates the substrate 36 shown in FIG.
For this reason, it is necessary to increase the capacity of the battery body 34 according to the specifications of the electronic device using the battery 100, and even if the capacity of the battery body 34 is The thickness D1 of the other portion 206 of the case 200 may be increased without changing the size of the portion 40 and the electrical connection portion arrangement portion 202. For this reason, the size and dimensions can be standardized and unified for any model without changing the electrical connection portion arrangement portion 202, the electrical connection portion 40, and the board 36.

As shown in FIGS. 3 and 4, the electric connection portion arrangement portion 202 is formed with a housing portion 202A for fitting and holding the electric connection portion 40. The lower case 32 is also provided with a housing portion 202B for fitting and holding the electric connection portion 40.

FIG. 11 shows an example of the cross-sectional structure of the battery 100 and the front part 24 of the mobile phone 10. FIG.
The front part 24 of the housing 12, the substrate 36, the connection terminals 300 of the electrical connection part 40, and the like are shown.

The electric connection section 40 has a housing 41 and a plurality of connection terminals 300. The connection terminal 300
For example, as shown in FIG. 7, a plurality are arranged at equal intervals. As shown in FIGS. 11 and 12, the connection terminal 300 has a connection portion 302 and another connection portion 303. Since the connection portion 302 is electrically connected to the conductor pattern of the substrate 36, the connection portion 302 is
6 can be supported by mechanically and elastically sandwiching one surface and the other surface. Thereby, the connection portion 302 and the substrate 3
6 are electrically connected.

The connection part 303 of the connection terminal 300 shown in FIG.
Is a portion that can be detachably connected to a contact 304 provided to protrude from the front part 24 side of the mobile phone. The connection portion 302 is made of an elastic member 302A.
And 302B, the connection portion 303 is also formed by the elastic members 303A and 303B. A contact 304 is detachably inserted between the elastic members 303A and 303B, and the contact 304 can be elastically sandwiched and held by the elastic members 303A and 303B. Thus, the contact 304 and the elastic members 303A and 303B of the connection portion 303 can be electrically detachably connected. Therefore, the contact 304 and the substrate 36 can be electrically connected via the connection terminal 300.

The connection terminal 300 and the contact 304 shown in FIG. 12 are made of a metal material which is elastically deformable and has excellent conductivity.
For example, it is made of SUS (stainless steel), copper, phosphor bronze, beryllium copper, or the like. Connection terminal 3 in FIG.
15 and the housing 307 of FIG.
For example, PPS (polyphenylene sulfide), LCP, which are examples of plastics having excellent insulation properties
(Liquid crystal polymer), PA (polyamide) and the like.

As shown in FIG. 10, grooves 40H are formed in the surface 40R and the surface 40S of the electric connection portion 40. Face 4
0R is almost flush with the surface 204 of the electrical connection portion, and the surface 40S is roughly flush with the surface 205. Each groove 40
H is formed at a position corresponding to the connection portion 303 of each connection terminal 300 as shown in FIG.
The contact 304 on the fourth side can be inserted into the corresponding connection portion 300 by being inserted through the groove 40H and can be connected.

The electrode take-out portions 50 and 52 shown in FIGS. 6 and 7 are electrically and mechanically connected to the lands 42 and 44 of the substrate 36 by using a solder portion 200. FIGS. 13 to 15 show an example of a connection method for electrically connecting the electrode extraction portions 50 and 52 to the lands 42 and 44 using such a solder portion 200. FIG.
FIG. 15 is an enlarged view of FIG. 6. In FIG. 15, the electrode extraction portions 50 and 52 are electrically connected to the lands 42 and 44 using the solder portions 200.

Next, using the solder portion 200 shown in FIG.
The electrode extraction portions 50, 52 are connected to the lands 42, 4 of the substrate 36.
An example of a method of electrically and mechanically connecting each of the PDPs 4 is described. As shown in FIG. 13, a solder ball 200A is prepared as a solder portion. This solder ball 20
0A is, for example, lead-free solder, for example, Su-Zn
System, Si-Cu system or Sn-Ag system.
In addition, with ordinary solder, 1: 9 solder (high melting point, Sn: P
b = 1: 9), 4: 6 solder or the like.

The solder ball 200A is a ball-shaped solder.
It can be inserted into an opening 300 formed at a predetermined position of 0,52. The opening 300 may be, for example, a circular hole or a notch of another shape.

On the other hand, the lands 42 and 44 of the substrate 36
Preferably, a hole 320 is formed. A hole 340 is also formed in the substrate 36 corresponding to the hole 320. In this manner, the holes 320 are formed in the lands 42 and 44 and the substrate 36
By forming the holes 340 in the holes, the positioning and fixing of the solder balls can be performed. In the state shown in FIG. 13, the electrode take-out parts 50 and 52 are positioned at an upper position of the substrate 36 in a state where the electrode take-out parts 50 and 52 are bent 180 degrees from the battery body 34.
In this state, the solder ball 200A is loaded in the direction of arrow J in FIG.

Next, as shown in FIG. 14, a jig 400 is preferably placed on the electrode take-out portions 50 and 52.
The jig 400 has a hole 400A.
The solder ball 200A is located in 0A. In this state, the lower portion of the solder ball 200A is held in a state of being fitted into the hole 320 of the lands 42 and 44, and
The peripheral surface of the solder ball 200A is held by the peripheral portion of the opening 300. By irradiating the laser beam L to the solder ball 200A in this state, the solder ball 200A is melted. As a result, the solder portion 200 is formed as shown in FIG. 15, so that the solder portion 200 fills the openings 300 of the electrode take-out portions 50 and 52, and connects the lands 42 and 44 and the electrode take-out portions 50 and 52 respectively. It can be electrically and mechanically connected. As the laser light L, a YAG laser light, an excimer laser light, a semiconductor laser light, or the like can be used. When the laser beam L is irradiated on the solder ball 200A in this manner, the solder ball 200A is held by the hole 400A of the jig 400, so that the solder ball 200A can be reliably held at a predetermined position.

FIG. 16 shows another embodiment of the present invention. In FIG. 16A, the electrode take-out sections 50, 52
Solder ball 200A is fixed to opening 301 in advance. The lower part of the solder ball 200A fits into the hole 320 of the lands 42, 44. Substrate 36
Is formed with a hole 340. If the laser beam L is irradiated in this state, the jig 4 used in FIG.
The use of 00 can be omitted. By irradiating the solder ball 200 </ b> A with the laser beam L, the solder part 200 divides the electrode extraction parts 50, 52 into the lands 42, 4 of the substrate 36, as shown in FIG.
4 can be electrically and mechanically connected to each other.

FIG. 17 shows the electrode take-out sections 50 and 52,
An example of the shape of the lands 42 and 44 of the substrate 36 is shown. FIG. 18 shows another example of the shapes of the electrode extraction portions 50 and 52 and the lands 42 and 44 of the substrate 36. In the example of FIG. 17, the solder portion 200 is formed between the electrode extraction portions 50 and 52 and the lands 42 and 44, respectively. In this case, the lands 42 and 44 correspond to the lands 60 on the back side of the substrate 36.
0 is electrically connected to a conductive portion 700 such as copper plating. The conductive portion 700 is formed on the inner peripheral surface of the hole 320 of the substrate 36 and between the lands 42 and 44 and the land 600. In the example of FIG.
7 shows an example in which the conducting portion 700 as shown in FIG. 7 is not formed. By forming the conductive portion 700 as shown in FIG. 17, the solder is also turned around the inner diameter portion of the hole, so that the area of the soldered portion is increased and the reliability is improved.

FIG. 19 shows an example of the configuration of an electrode extraction section 50 corresponding to a negative electrode. FIG. 20 shows an example of forming the electrode lead-out portion 52 which is a positive electrode. FIG. 21 shows another example of forming the electrode lead-out portion 52 as a positive electrode.
In the electrode extraction part 50 of FIG.
A u-flash (Au plating) 50B is formed.
By forming the Au flash 50B on the Ni substrate 50A in this manner, the soldering performance, that is, the solder wettability can be significantly improved. In the electrode extraction part 52 of FIG. 20, a Ni base 50D is formed on the surface of the Al base 50C, and an Au flash (A) is formed on the Ni base 50D.
u plating) 50E. By forming the Au flash 50E in this manner, the electrode take-out portion 5 is formed.
2 can significantly improve the wettability of the solder. FIG. 2
In the one electrode extraction portion 52, the solder wettability can be improved even if the solder 50F is directly formed on the surface of the Al base 50C. The solder 50F of FIG. 21 is formed as follows. The Al base 50C is placed in the melted solder layer to form an electrode in which Al and the solder are directly bonded by ultrasonic waves. FIG. 5C shows this tank 3000. Ultrasonic vibration 3002 on melted solder 3001
Is given, cavitation occurs around the ultrasonic horn 3003. This cavitation is also called a cavity. The metal atoms in the solder 3001 evaporate into bubbles in this almost vacuum-closed cavity. Thereafter, the vibration mode of the ultrasonic vibration 3002 is reversed, the cavity is crushed at a stretch, and the surrounding solder 3001 rushes toward the center and collides. At this time, a large impact and a destructive force are generated, and the action of cleaning dirt on the surface of the electrode 3004 of the polymer battery and the action of destroying the oxide film and bonding the solder 3000 to the metal work. It can be coupled to the electrode 3004.

In the embodiment shown in FIGS. 19 to 21, the solder shown in FIG. As a result, the extraction electrode of the battery and the substrate can be easily electrically and mechanically connected by soldering. At this time, the electrode take-out portions 50 and 52 are joined together at the time when the solder portions are provided by a reflow furnace or the like.

In the embodiment of the present invention, a solder ball is used to form a solder portion. However, in addition to a ball-shaped solder, a cubic shape, a rectangular parallelepiped shape, another polygonal shape,
For example, a triangular shape may be used.

As described above, in the embodiment of the present invention, as shown in FIG. 15, the electrode extraction portions 50 and 52 of the battery body 34 are connected to the lands 42 and 44 of the substrate 36 by using the solder portion 200. Since the connection can be easily made electrically and mechanically, the battery and the electronic device having the battery can be reduced in size and thickness. In addition, the number of components for such electrical connection can be reduced, and the processing cost can be reduced, so that the cost can be reduced. The electrical connection between the electrode extraction portion 50 and the land can be easily performed, and since the electrode extraction portion and the land are directly joined by using the solder portion 200, the electrical and mechanical connection reliability is improved. be able to. Further, the land may be formed directly on the circuit formed directly inside the case without using the substrate instead of the substrate.

In the embodiment of the present invention, unlike the related art,
Since the electrode take-out portion and the land of the substrate 36 can be directly electrically and mechanically connected without using another component such as a terminal, the workability can be improved, and the bonding strength is increased because the connection is not pinpoint bonding. Can be.

The present invention is not limited to the above embodiment. In the above-described embodiment, the case has, for example, a rectangular parallelepiped shape, but is not limited to this, and may of course adopt a cylindrical shape or another shape. The electronic device on which the battery of the present invention is mounted is not limited to a mobile phone, but is applied to a portable computer, a portable game device, a digital still camera, a video camera, a personal information terminal, and the like. Of course, it doesn't matter.

[0045]

As described above, according to the present invention,
The size and thickness can be reduced, the reliability of the electrical connection can be improved, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a mobile phone as an example of an electronic apparatus having a battery of the present invention.

FIG. 2 is a rear view of the mobile phone of FIG. 1;

FIG. 3 is an exploded perspective view of the battery shown in FIG.

FIG. 4 is an enlarged view of the battery of FIG. 3;

FIG. 5 is a diagram showing a battery main body.

FIG. 6 is a diagram showing an example in which a battery main body is connected to a substrate.

FIG. 7 is a plan view showing a substrate, an electric connection portion, and the like arranged in a lower case.

FIG. 8 is a rear view of FIG. 7;

FIG. 9 is a sectional view showing an upper case, a lower case, an electric connection portion, and the like.

FIG. 10 is a perspective view showing a battery.

FIG. 11 is a diagram showing an example of a cross-sectional structure taken along line AA of FIG. 7;

FIG. 12 is a perspective view showing a connection terminal of an electric connection portion and a contact on a mobile phone side.

FIG. 13 is a view showing a state before a solder ball is loaded into an opening of the electrode lead-out portion in order to electrically connect the electrode lead-out portion to a land of the substrate.

FIG. 14 is a view showing a state where laser light is irradiated after a solder ball is loaded into an opening of an electrode take-out portion.

FIG. 15 is a view showing a state in which an electrode extraction portion and a land are directly connected by a solder portion formed by melting a solder ball;

FIG. 16 is a diagram showing a state in which the electrode take-out portion and the land of the substrate are combined by another method in the present invention.

FIG. 17 is a diagram showing an example of forming a land and a conductive portion of a substrate.

FIG. 18 is a diagram showing another example of forming a land on a substrate.

FIG. 19 is a diagram showing a configuration example of an electrode extraction portion (negative electrode).

FIG. 20 is a diagram showing a configuration example of an electrode extraction portion (positive electrode).

FIG. 21 is a diagram showing another configuration example of the electrode take-out portion (positive electrode).

FIG. 22 is a perspective view showing a connection example of a conventional battery body.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Cellular phone (electronic device), 30 ... Upper case, 32 ... Lower case, 34 ... Battery body (cell), 36 ... Board, 42, 44 ... Board land , 50, 52... Electrode take-out part of battery body, 10
0: Battery, 200: Case, 200: Solder part, 200A: Solder ball, 300: Opening of electrode extraction part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kiyoshi Tomura 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Shunji Amano 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Junichi Osako 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F-term (reference) 5H040 AA04 AS13 AT04 AY04 CC01 CC11 DD02 DD07 LL01

Claims (12)

[Claims] 1. A case, a battery body disposed in the case and having an electrode lead-out part, a land placed in the case and electrically connecting the electrode lead-out part of the battery body, and the battery A battery, comprising: a solder portion that is disposed in an opening formed in the electrode extraction portion of a main body and electrically and mechanically connects the electrode extraction portion and the land. 2. The battery according to claim 1, wherein the lands are formed on a substrate disposed in the case. 3. The battery according to claim 1, wherein the land is formed directly on the case. 4. The battery according to claim 1, wherein the solder portion electrically and mechanically connects the electrode extraction portion and the land by melting with a laser beam. 5. The battery according to claim 4, wherein the solder portion is a solder ball. 6. An electrode lead-out part of a positive electrode and the electrode lead-out part of a negative electrode, wherein the electrode lead-out part of the positive electrode is made of Ni on an Al base material.
The battery according to claim 1, wherein the Au plating is formed on a substrate. 7. The positive electrode according to claim 1, further comprising a positive electrode lead-out part and a negative electrode lead-out part, wherein the positive electrode lead-out part forms a solder layer on an Al base material. battery. 8. An electronic device to which a battery can be removably mounted, wherein the battery includes a case, a battery main body having an electrode take-out portion disposed in the case, and a battery main body having the electrode main body disposed in the case. A land for electrically connecting the electrode lead-out part, and a solder disposed in an opening formed in the electrode lead-out part of the battery body to electrically and mechanically connect the electrode lead-out part and the land. And a battery unit. 9. The battery according to claim 8, wherein the lands are formed on a substrate disposed in the case. 10. The battery according to claim 8, wherein the land is formed directly on the case. 11. The battery according to claim 8, wherein the solder portion electrically and mechanically connects the electrode extraction portion and the land by melting with a laser beam. 12. The battery according to claim 11, wherein the solder portion is a solder ball.