JP2001351593A - Battery pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack ensuring fixing of a conductive connection terminal and having good position accuracy. SOLUTION: In the battery pack in which the conductive connection terminal forming a conductive contact face on the outside is arranged on the inside of the opening arranged on the wall face of a container, a plurality of engagement parts for holding the conductive connection terminal are provided in the vicinity of a conductive contact face forming hole formed on the container face of the battery pack, and the conductive connection terminal is engaged with the engagement parts through elastic deformation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack, and more particularly to a battery having a conductive contact portion for forming a conductive connection between a charger and a contact of a battery-powered device during charging and discharging. It's about packs.

[0002]

2. Description of the Related Art Devices using a battery as a power source are widely used in small or portable devices. In these devices, when a secondary battery is used, a detachable battery pack according to a required power supply capacity is used. The battery pack includes one or more unit cells in a container made of a member made of an electrically insulating synthetic resin or the like, and a circuit for conductively connecting the unit cells so that a desired voltage or current can be output, or It has a built-in protection circuit for charging or discharging the battery.

Further, the surface of the container has a conductive contact portion for making a conductive connection with a battery-powered device or a charging device. The conductive contact part provided on the battery pack can be securely connected to equipment using a battery or a charging device, and if the battery pack is taken out of the equipment and left unattended, it may come into contact with conductive members and cause a short circuit accident, etc. It is provided in the recess of the container so that it does not happen.

FIG. 3 is a view for explaining a method of forming a conductive contact portion of a conventional battery pack. FIG. 3A is a perspective view in which a part of the lower container 3 of the battery pack is cut away. The lower container 3 of the battery pack has a contact surface which is closed by conductive connecting terminals attached to the inner surface of the lower container 3 on both sides across a ridge where two surfaces intersect and which is conductively connected to the contact surface of the conductive connecting terminal from the outside. It has a forming hole 9. The lower container has a mounting projection 15 to which the conductive connection terminal 7 can be fixed. Then, as shown in FIG. 3 (B), after the conductive connection terminal 7 is fitted to the mounting projection provided on the bottom surface of the lower container 3, the opening 17 of the conductive connection terminal 7 is fitted. The conductive connection terminal 7 is fixed by fusing the top by heat staking.

FIG. 3C is a cross-sectional view taken along the line CC 'in FIG. 3B, and shows a state in which the upper portion of the mounting projection is fixed by heat caulking. like this,
In the conventional battery pack, a heat caulking process of the conductive connection terminal is necessary, and the fixing accuracy by the heat caulking tends to lower the positional accuracy of the conductive connection terminal. A problem may occur in the conductive connection with the contact.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a battery pack capable of reliably performing conductive connection with a battery-powered device or a charger.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a battery pack provided with a conductive connection terminal for forming a conductive contact surface on an outer surface inside an opening provided in a wall surface of the container. In the vicinity of the formed conductive contact surface forming hole, has a plurality of engagement portions for holding the conductive connection terminal,
The problem can be solved by a battery pack in which the conductive connection terminal is engaged with the engagement portion by elastic deformation. Further, the battery pack has an opening formed continuously on two adjacent surfaces of the container, and the conductive connection terminal is formed of an L-shaped member.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a battery pack according to a first embodiment of the present invention; FIG. Provided is a battery pack which is mounted on a wall of the battery pack, has a secure fixation, has accurate mounting position accuracy of the conductive connection terminal, and can reliably perform conductive connection with a battery-using device and a charger. Things.

A battery pack according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view illustrating the appearance of the battery pack of the present invention. The battery pack 1 is composed of a lower container 3 and an upper container 5, accommodates a desired number of cells, provides a battery protection circuit and the like, and connects the cells and the conductive connection terminals 7 to each other. Container 5
Are joined by bonding with an adhesive or welding by means such as ultrasonic welding.

FIG. 2 is a diagram for explaining a mounting portion of the battery pack according to the present invention for attaching conductive connection terminals, and FIG.
FIG. 4 is a perspective view illustrating a mounting portion of a conductive connection terminal on the inner surface of the container of the battery pack. The lower container 3 of the battery pack has a contact surface forming hole 9 that is continuous on both sides across a ridge where two surfaces intersect, and near the contact surface forming hole 9,
It has an engaging portion 11 of a conductive connection terminal, and is fixed by engaging the conductive connection terminal 7 with the engaging portion 11. FIG.
FIG. 2B is a cross-sectional view taken along line AA ′ in FIG. 2A and is a diagram illustrating a method of attaching the conductive connection terminal 7 to the engagement portion 11. The wall surface 13 of the lower container 3 made of a synthetic resin material is elastically deformable, and is deformed outward, and at the same time, one end of the conductive connection terminal 7 is engaged with the bottom engagement portion 11a to form the conductive connection terminal. The other end of the conductive connection terminal 7 is elastically deformed and the other end of the conductive connection terminal 7 is attached to the side surface engaging portion 11b, and the conductive connection terminal 7 is fixed as shown in FIG.

FIG. 2 (D) is a cross-sectional view of FIG.
It is sectional drawing cut | disconnected by the B 'line, since a conductive connection terminal engages with the bottom part engaging part 11a and the side surface engaging part 11b, and is fixed. It is possible to obtain a battery pack in which the distances a and b between the conductive connection surface and the wall surface of the battery pack are small and the conductive connection can be reliably performed.

[0012] In the battery pack of the present invention, an example has been described in which the conductive connection terminal uses an L-shaped member for a junction between two wall surfaces, that is, a contact hole connected to two surfaces formed at corners. , May be formed only on one of the surfaces. Also, the conductive connection terminal is
A nickel plate or a thin plate of phosphor bronze plated with nickel plating, gold plating, or the like can be used, but it is preferable to use a spring-like member that can be strongly fixed to the engagement portion after elastic deformation.

[0013]

According to the battery pack of the present invention, the conductive connection terminals can be securely and easily mounted, and the position accuracy of the conductive connection terminals is excellent. And the conductive connection can be reliably performed.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an appearance of a battery pack.

FIG. 2 is a diagram illustrating a mounting portion of a conductive connection terminal of the battery pack of the present invention.

FIG. 3 is a diagram illustrating a conductive connection terminal portion of a conventional battery pack.

[Explanation of symbols]

1 ... battery pack, 3 ... lower container, 5 ... upper container,
7 ... conductive connection terminal, 9 ... conductive connection terminal contact hole, 11 ... engagement part, 11A ... first engagement part, 11B ... second engagement part, 13
... wall surface, 15 ... mounting projection, 17 ... opening

Claims (1)

[Claims] In a battery pack provided with a conductive connection terminal for forming a conductive contact surface on an outer surface inside an opening provided on a wall surface of a container, the battery pack is provided near a conductive contact surface forming hole formed on a container surface of the battery pack. A battery pack comprising: a plurality of engagement portions for holding conductive connection terminals, wherein the conductive connection terminals are engaged with the engagement portions by elastic deformation.