JPH1055790A - Feeding bus bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance power feeding capacity and waterproof capacity by providing an elastic support base on a back face of a connection terminal, properly pressure-contacting a power feeding junction face of the connection terminal with a mating connection portion, and sealing between the junction faces with a window frame of a pack for the connection terminal by a gasket made of rubber material capable of compression molding. SOLUTION: An elastic rubber based elastic support base 15 is integrally attached to a back side of a power feeding junction face 11 in a connection terminal 10a. This attachment is sintered by compression molding and integrally linked via a pressure contact hole 13 provided for a bending part 12. A gasket 16 is formed on an outer circumference side of the support base 15. This gasket 16 is also made of elastic rubber or resin material having elasticity. The gasket 16 comes into intimate contact with a window frame 33 of a top case 31 so that water or the like does not enter from the outside. Further, the gasket 16 can be formed thinly from the support base 15, and a battery can be easily assembled and miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply bus bar for a battery. In particular, the present invention relates to a power supply bus bar having a connection terminal with an improved energizing function as well as a waterproof function.

[0002]

2. Description of the Related Art As a prior art related to the present invention, there is a battery pack provided with a power supply bus bar shown in FIG.

FIG. 6 is a sectional view showing the structure of a connection terminal 53 in a bus bar 52 in a battery pack 50. In FIG. 6, a battery pack 50 has a power supply chamber 51 in which an upper case 50a and a lower case 50b are welded and a rechargeable battery A and the like are provided inside.

A rechargeable battery A is disposed in a power supply chamber 51 of the battery pack 50, and a bus bar 52 having a connection terminal 53 for supplying power from the rechargeable battery A to the outside is disposed.

The bus bar 52 is connected to the positive contact Aa of the rechargeable battery A.
Each terminal is connected to the negative side contact Ab, and connection terminals 53a and 53b are formed at the other end. It should be noted that the connection between the rechargeable battery A and the bus bar 52 is detailed only in the + terminal 60a.

[0006] The connection terminal 53 is attached to an attachment window 54 of the battery pack 50 so as to be electrically connected to an external connection contact (not shown).

The battery pack 50 is provided with a first connection terminal 53a and a second connection terminal 53b.

[0008] The first connection terminal 53a is provided integrally with a terminal block 55 made of a resin material. And it is attached to the attachment window 54 via the gasket 56. Further, the first connection terminal 53a is connected to the upper case 50 via a spacer 57.
a, or supported by the rechargeable battery A.

Due to the fact that the terminal block 55 is formed integrally with the connection terminal 53, when the terminal block 55 is formed integrally with the bus bar 52, the molding cost increases due to the size of the molding die. Therefore, the connection terminal 53 is divided, and one end 61 is connected to the bus bar 52.
Are connected by soldering. In the soldering step, the number of steps is increased because the connection terminal 53 side is gold-plated and the bus bar side must be solder-plated.

The second connection terminal 53b is connected to the lower case 5
0b, and is connected to the bus bar 52. The second connection terminal 53b is also attached to the attachment window 54 via the gasket 56, similarly to the first connection terminal 53a. In addition, between the second connection terminal 53b and the rechargeable battery A is attached via an insulating paper 58 or an insulating spacer.

[0011]

The above-mentioned connection terminal 53
Since the is formed integrally with the terminal block 55 made of a resin material, it is formed to be short due to the arrangement in a molding die. For this reason, since the connection terminal 53 must be soldered to the bus bar, the soldered portion 59 of the bus bar requires solder plating. Further, since the connection terminals 53 are plated with gold, two plating steps are required. Therefore, the connection circuit of the bus bar 52 increases the number of steps and causes a failure.

A gasket 56 is provided to seal the joint surface between the terminal block 55 and the cases 50a and 50b. However, since the gasket 56 is small enough to be attached with tweezers, it becomes difficult to attach it. Also, the sealing effect is insufficient.

Further, it is difficult to bond (sequence) the connection terminal 53 and the terminal block 55, and the terminal block 55 may peel off from the connection terminal 53 in some cases. In addition, the connection terminal 53 is supported by the terminal block 55. However, the insufficient elastic support causes a conduction failure.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to improve the current-carrying contact of a connection terminal and to easily penetrate from between the connection terminal and a mounting window. The purpose is to ensure a moisture seal.

[0015]

The power supply bus bar of the present invention has been made to solve the above-mentioned problems, and the technical means thereof is configured as follows.

A bus bar having a window frame for mounting a connection terminal and being mounted in a power room of a pack having a power room therein, and a power supply circuit connected to a power supply, and arranged in the window frame connected to the power supply circuit. A connection terminal having an energizing joint surface to be joined to the mating contact, and an elastic support base made of a rubber-like elastic material that is integrally adhered to a surface of the connection terminal opposite to the energizing joint surface and supports the energizing joint surface. And a gasket bonded to the connection terminal to seal between the bonded terminal and the window frame.

[0017]

The power supply bus bar constructed as described above is connected to the power supply circuit 2 connected to a power source such as a battery by connecting terminals 10.
And the connecting terminal 10 is integrally provided with the elastic supporting base 15, so that when the contact of the partner is brought into contact with the connecting terminal 10, the elastic supporting base 15 is connected to the energized joint surface 11 of the connecting terminal 10. To make contact with the contacts by elastic force. At the same time, the gasket 16 is
3, so that moisture or the like can be prevented from entering the power supply chamber 34 through the window frame 33 of the pack 30.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a power supply bus bar according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view showing a power supply bus bar according to an embodiment of the present invention attached to a battery pack.

In FIG. 1, reference numeral 1 denotes a power supply bus bar.
The power supply bus bar 1 is provided at one end with a positive terminal 5a that contacts the positive contact Aa of the rechargeable battery A and a negative terminal 5b that contacts the negative contact Ab. A plate-shaped power supply circuit 2 having both hardware and software is formed in a band shape from the terminals 5a and 5b to the connection terminal 10 side.

The power supply circuit 2 is made of a Ni plate. The insulating film 3 made of polyimide or the insulating film 3 made of polyamide is adhered to both sides except for the current-carrying surface 11.
The insulating film 3 prevents the current flowing through the power supply circuit 2 from leaking.

A first connection terminal 1 is provided at one end of the power supply circuit 2.
0a is formed. The outer surface of the first connection terminal 10a is formed with a current-carrying joint surface 11 for joining with a mating contact. The bent portions 1 are provided on both sides of the energized joining surface 11.
2

An elastic support 15 made of an elastic rubber, which is a rubber-like elastic material, is integrally adhered to the back side of the current-carrying surface 11 of the first connection terminal 10a. This adhesive is baked by compression molding, and is integrally connected via an adhesive hole 13 provided in the bent portion 12.

A gasket 16 is formed on the outer peripheral side of the elastic support base 15. The gasket 16 is also made of elastic rubber or resin material having elasticity. The gasket 16 is configured to be in close contact with the window frame 33 of the upper case 31 so that moisture and the like do not enter from the outside.

The gasket 16 may be formed thinner than the elastic support base 15. The material of the gasket 16 is preferably a rubber material that can be compression-molded so as to exhibit a sealing ability.

The window frame 33 of the lower case 32 is also provided with a second connection terminal 10b. This second connection terminal 10b
Is formed at the other end of the power supply circuit 2 by being bent in a U-shape.

The energized bonding surface 1 of the second connection terminal 10b
An elastic support base 15 is fixed to the back side of 1 by being baked in the same manner as the first connection terminal 10a. A gasket 16 is integrally bonded around the elastic support base 15 to the front and back of the second connection terminal 10b. This gasket 16
Are strongly integrally fixed through an adhesive hole 13 penetrating the connection terminal 10.

The elastic support 15 is also made of a rubber material. The rechargeable battery A side of the gasket 16 functions as a spacer and at the same time acts as an insulator.

The elastic support 15 of the first connection terminal 10a
May be held via a spacer, but the upper case 3
1 may be directly supported, or may be directly supported on the rechargeable battery side.

FIG. 2 is a plan view of a main part of a power supply bus bar showing another embodiment, and FIG. 3 is a sectional view taken along line XX of FIG. FIG. 4 is a sectional view taken along line YY of FIG.

The power supply bus bar 1 shown in FIG. 2 is provided with three connection terminals 10, 10, 10 in parallel. An insulating film 3 made of a polyimide material is adhered to both sides of the power supply circuit 2 to insulate the power supply to the outside. The power supply circuit 2 and the connection terminals 10 are Ni plates, but other well-known conductors are also used.

The connection terminal 10 is formed so as to project in a U-shape as shown in FIG. The surface projecting in a U-shape is the energization bonding surface 11. Also, both sides of the U-shape are bent portions 12. Further, an elastic support base 15 made of rubber or resin material having rubber-like elasticity is baked and adhered to the inside of the U-shape so as to be integrated. The insulating film 3 is also bonded between the connection terminal 10 and the elastic support 15.

A gasket 16 is formed around the elastic support base 15. The elastic support 15 and the gasket 16 are continuously integrated on the side surface of the elastic support 15 and connected. Further, the gasket 16 is connected to the connection terminal 10.
Are mechanically coupled to the connection terminal 10 via an adhesive hole 13 provided outside the bent portion 12 of the electronic device and are integrally fixed thereto.

Although the thickness of the Ni plate of the power supply circuit 2 and the connection terminal 10 is about 0.25 mm, the thickness is set as necessary in view of the power supply capacity and flexibility. Also, the insulating film 3
Used a polyamide material in addition to polyimide. And the thickness was about 0.3 mm, but 0.1 mm ~
Those having a range of 0.6 mm were also employed. In addition, gasket 1
6 is 0.1 mm thick from the surface of the connection conductor surface of the connection terminal 10.
The shape protrudes from 3 to 0.5 mm, and the thickness is set as required.

FIG. 5 shows another embodiment of the bus bar of the present invention.

FIG. 5 is a sectional view of another embodiment taken along line YY shown in FIG. In this embodiment, the elastic frame 15 is reduced to one, and the window frame 3
3 is also one. The one elastic support base 15 is provided with three connection terminals 10.

The insulating film 3 is adhered over the entire surface between the connection terminal 10 and the elastic support base 15 as well. Also in the case of the insulating film 3, a polyamide or polyimide material was used.
However, even if other insulating materials are used, a sufficient function can be obtained.

The power supply bus bar 1 of the present invention is effective when used in a battery pack of a portable communication device, a telephone, a PHS, etc., but is excellent in waterproofing in other devices using the power supply bus bar 1. Is recognized.

In particular, it has been found that moisture is prevented from entering the power supply chamber 34 of the pack, and that the contact terminal 10 has an excellent contact energizing effect. In addition, the wiring assembly of the power supply bus bar 1 is simplified, and there is no failure in energization, and the reliability of performance is improved. Further, when the power supply bus bar 1 is used, the battery pack 21 can be downsized. Further, by using the rubber material for the elastic support base 15 and the gasket 16, the power supply circuit can be molded with a small molding die at the longest, so that production costs can be reduced.

[0040]

According to the power supply bus bar of the present invention, since the elastic supporting base is provided on the back surface of the connection terminal, the current-carrying joint surface of the connection terminal can be appropriately pressed against the mating connection portion, and the current-carrying capacity can be improved. It has an excellent effect.

Further, a compression-moldable rubber gasket that can be molded into the connection terminal together with the elastic support base can seal the joint between the pack and the window frame to prevent moisture from entering the power supply chamber. It can be effectively prevented.

Further, since the elastic support base is made of a rubber-like elastic material, the connection terminals can be directly supported by the power supply member (for example, the outer surface of the rechargeable battery), so that the assembly is simplified and the size is reduced. Can be expected.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a power supply bus bar according to an embodiment of the present invention, which is attached to a battery pack.

FIG. 2 is a plan view of a main part of a power supply bus bar according to another embodiment of the present invention.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a sectional view taken along line YY of FIG. 2;

FIG. 5 is the same cross-sectional view as FIG. 4 of still another embodiment of the present invention.

FIG. 6 is a cross-sectional view in which a conventional bus bar is attached to a battery pack.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Power supply bus bar 2 ... Power supply circuit 3 ... Insulating film 5, 60 ... Terminal 5a, 60a ... + terminal 5b, 60b ... Negative terminal 6 ... With solder 10, 53 ... Connection terminal 10a ... First connection terminal 10b Second connection terminal 11 Current bonding surface 12 Bend 13 Adhesive hole 15 Elastic support 16 Gasket 20 Batteries 21 and 50 ... Battery pack 30 ... Pack 31, 50a ... Upper case 32, 50b ... Lower case 33 ... Window frame 34, 51 ... Power supply room 52 ... Bus bar 53a ... First connection terminal 53b ... Second Connection terminal 54: Mounting window 55: Terminal block 56: Gasket 57: Spacer 58: Insulating paper 59: Solder 61: One end 62: Connection A: Rechargeable battery Aa: + Side contact Ab… -−side contact

Claims (1)

[Claims] 1. A window frame (3) for mounting a connection terminal (10).
A bus bar (1) mounted in the power supply chamber (34) of the pack (30) having the power supply chamber (34) therein and having the power supply circuit (34) therein;
And the window frame (33) connected to the power supply circuit (2).
And a connection terminal (10) having a current-carrying joint surface (11) to be joined to a mating contact and to be integrally bonded to the opposite surface of the connection terminal (10) from the current-carrying joint surface (11). And an elastic support base (15) made of a rubber-like elastic material for supporting the energizing joint surface (11), and is adhered to the connection terminal (10) so that the connection terminal (10) and the window frame (33) A power supply bus bar, characterized by having a gasket (16) for sealing between them.