JPH0238371Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a battery pack used as a power source for portable equipment or a memory pack-up.

(b) Prior art A battery group consisting of a pair of halved cases, at least two batteries housed in an internal space formed by overlapping these cases and electrically coupled to each other, and the battery group. A battery pack is disclosed in Japanese Utility Model Application Publication No. 150267/1983, which includes positive and negative external terminal plates, one end of which is connected to the positive and negative terminals of the battery, and the other end of which is exposed outside the case.

In this type of battery pack, in order to facilitate the process of connecting the positive and negative external terminal plates to the positive and negative terminals of the battery group, one case on the side that houses the battery group is shaped like a shallow dish, as seen in the above publication. The other case is shaped like a deep dish.

(c) Purpose of the invention The present invention simplifies the process of connecting the positive and negative terminals of the battery group to the external terminal boards of the positive and negative terminals in a battery pack in which a pair of half-split cases have approximately the same shape, thereby simplifying the assembly process. The purpose is to measure.

(d) Structure of the invention The battery pack of the invention includes a pair of half-split cases having substantially the same shape, and at least two casings electrically connected to each other and housed in an internal space formed by overlapping these cases. A battery group consisting of batteries, and a generally L-shaped battery group, in which one end of the positive and negative terminals of the battery group are fixed by welding, and the other end is exposed outside the case and extends and is locked in a recess in the side wall of the case. positive and negative external terminal plates, wherein a notch is formed on the end face of one of the cases to allow exposure of the positive and negative terminals of the battery group, and a cutout is formed on the end face of the other case. The one end of the positive and negative electrode external terminal plate is welded and fixed to the positive and negative electrode terminal through the notch, and the battery group is connected to one side by the positive and negative electrode external terminal plate. It is characterized in that it is held in the case and that one of the cases and the other of the cases are joined.

(e) Examples Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 to 7, reference numerals 1 and 2 are a pair of half-split cases made of synthetic resin having substantially the same shape, and an internal space is formed by overlapping these cases.

Reference numeral 4 denotes a battery group formed by connecting at least two batteries 3, 3 in series (the case of two batteries is illustrated in this embodiment), and the positive and negative electrode terminals 5 as the battery group are provided on the upper surface of the battery group. , 6 are located.

The end face of one case 1 is formed with notches 7, 7 through which the positive and negative terminals 5, 6 of the battery group 4 are exposed, and the positive and negative terminals are located at positions opposite to the notches 7, 7. Through hole 1 through which external terminal plates 8 and 9 are inserted
0, 10 are provided, and positive and negative external terminal plates 8,
Recesses 11, 11 on which the externally exposed parts of the case No. 9 are placed.
is provided.

On the other hand, protrusions 12, 12 are formed on the end face of the other case 2 to fit into the notches 7, 7 formed in the end face of the one case 1. A groove 13 provided on the outer surface of the case 2 is a groove for preventing reverse insertion.

Next, the assembly method will be described in detail with reference to FIGS. 6 and 7.

First, as shown in FIG. 6, the battery group 4, in which a pair of batteries are arranged in parallel, is inserted into the recess of one case 1, and the positive and negative external terminal plates 8 and 9 are respectively inserted into the case 1.
through the through holes 10, 10 of each terminal plate 8,
One end of the battery 9 is set at a position corresponding to the positive and negative terminals 5 and 6 of the battery group 4.

Next, as shown in FIG. 7, the positive and negative external terminal plates 8 and 9 are attached to the corresponding positive and negative terminals 5 and 6 using a pair of welding electrodes (not shown) through the notches 7 and 7 of the case 1, respectively. Welded to electrically and mechanically connect.

In addition, for the lower surface of the battery group 4, a connecting piece 1 incorporating a fuse is connected between the battery group and the lower end surface of the case 1.
4 is inserted and welded in the same manner as described above through the notches 7', 7' provided on the lower end surface to electrically connect the pair of batteries 3, 3 in series.

In this embodiment, also on the lower surface of the case, notches 7', 7' are provided on the end surface of the case 1, and protrusions 12', 12' are provided on the end surface of the case 2, so that the unit cell can be inserted through the notches. Although we have shown an example in which the connection piece installation process is performed to connect between the cells, it is also possible to connect the cells in advance before inserting them into the case. There is no need to form cutouts or protrusions.

Thereafter, the case 2 is placed on the case 1, and the joined portions of both cases are bonded together by, for example, ultrasonic welding to complete the process.

FIG. 8 shows a plan view of a battery pack according to another embodiment of the present invention. In this embodiment, the cutout portion 15 of the case 1 includes a portion exposing the positive and negative terminals of the battery group, and is cut into a large size. This embodiment differs from the previous embodiment in that the protrusion 16 of the case 2 is formed in a shape corresponding to the shape of the notch 15.

(f) Effect of the invention According to the invention, a notch is formed on the end face of one of the two halves of the case to expose the positive and negative terminals of the battery group, so that the two halves can be connected through this notch. With the welding electrodes, the positive and negative terminals and the positive and negative terminal plates of the battery group can be easily welded, respectively, and even if the two halves of the case are made into approximately the same shape, the connection process can be easily performed and assembly is possible. In addition to simplifying the process, a protrusion is formed on the end face of the other case that fits into the notch formed in the end face of one case during polymerization, so the connection part is not exposed in the completed battery pack and the appearance is improved. It is something that cannot be lost,
This type of battery pack has extremely great practical value.

[Brief explanation of the drawing]

The drawings are all related to the present invention and are shown in Figures 1 to 7.
The figures show one embodiment of the present invention, in which Fig. 1 is a plan view of the battery pack, Fig. 2 is a bottom view of the battery pack, and Fig. 3 is a top view of the battery pack.
Figure 4 is a cross-sectional view taken along line a-a' in Figure 4, Figure 4 is a cross-sectional view taken along line b-b' in Figure 3, Figure 5 is a cross-sectional view taken along line c-c' in Figure 3, and Figures 6 and 7 show the assembled state. FIG. FIG. 8 is a plan view of a battery pack according to another embodiment of the present invention. 1, 2...Pair of split cases, 3, 3...Batteries, 4...Battery group, 7, 7', 15...Notches,
8, 9...Positive and negative electrode external terminal board, 10...Through hole, 1
1... recess, 12, 16... protrusion, 13... groove for preventing reverse insertion.

Claims (1)

[Scope of utility model registration request] A battery group consisting of a pair of half-split cases 1 and 2 having approximately the same shape, and at least two batteries 3 that are housed in an internal space formed by overlapping these cases 1 and 2 and electrically coupled to each other. 4, one end of each of the positive and negative terminals 5, 6 of the battery group 4 is welded and fixed, and the other end is exposed outside the case, and the case 1,
The terminals of the battery group 4 are provided with substantially L-shaped positive and negative electrode external terminal plates 8 and 9 that are extended and locked in the recesses 11 in the side walls of the battery group 4, and Notches 7 and 15 are formed in which the notches 5 and 6 can be exposed, and protrusions 12 and 16 that fit into the notches 7 and 15 are formed on the end face of the other case 2, and the notches 7 and 6 are exposed. The ends of the positive and negative electrode external terminal plates 8 and 9 are welded and fixed to the positive and negative electrode terminals 5 and 6 through the positive and negative electrode external terminal plates 8 and 9, and the battery group 4 is connected to one of the cases by the positive and negative electrode external terminal plates 8 and 9. 1, and the battery pack is formed by joining the case 1 on one side and the case 2 on the other side.