JPH041636Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a power supply device used to power cordless equipment such as transceivers, handheld computers, and typewriters, and is a power supply device that is made by electrically connecting multiple batteries. It is related to the structure of

(b) Conventional technology A power supply device in which a plurality of secondary batteries such as nickel-cadmium batteries are electrically connected is used as a power source for cordless equipment, and as cordless equipment becomes smaller, the size and reliability of this power supply equipment has improved. Improvement in gender is strongly desired.

Generally, a power supply device has a configuration as shown in Japanese Utility Model Application Publication No. 141572/1983. In other words, a plurality of series-connected secondary batteries arranged in multiple rows, electrical components such as a temperature sensing element that detects battery temperature rise during charging, an overcurrent breaker that opens when detecting an overcurrent, and an external terminal. It consists of a battery case, etc. that stores these, and a secondary battery electrode terminal,
Electrical connections are made between the electrical components and the external terminals by soldering lead wires.

However, since the lead wire is covered with a covering tube and has a large thickness, when wiring is performed using a lead wire, the outer diameter becomes large and it is difficult to fit the lead wire into a predetermined size. This is because when leading the lead wires in the longitudinal direction of the battery rows arranged side by side, since the batteries are generally cylindrical, if the lead wires are placed in the space formed between the adjacent battery rows, the external size becomes larger. However, if it becomes necessary to lead the lead wires in the direction perpendicular to the longitudinal ends of the battery rows arranged side by side and in the direction perpendicular to the battery rows, the lead wires should be led out in a state that protrudes from the battery rows. This is because it has to be done. In addition, soldering is labor-intensive and difficult to automate, resulting in longer work times and a higher failure rate than welding.
When wiring using lead wires, there are many soldering points, which poses problems in workability and reliability.

When it comes to downsizing power supply devices, using a flexible wiring board can prevent the external size from increasing as would be the case when using lead wires, but it is not possible to directly weld to a flexible wiring board. However, electrical connections between the flexible wiring board and the battery power terminal, electrical components, and external terminals must be made by soldering, which is still unsatisfactory in terms of workability and reliability.

(c) Problems to be solved by the invention The present invention aims to provide a compact and highly reliable power supply device.

(d) Means for Solving the Problems The power supply device of the present invention connects the electrode terminals of a battery group made up of a plurality of batteries arranged on one side of an insulating sheet, electrical components and external terminals to a lead plate. A lead plate for electrically connecting these is arranged on the other surface of the insulating sheet.

(e) Effect If the electrode terminals of the battery group, electrical components, and external terminals are directly electrically connected using a lead plate that is thinner than the lead wire, the external size of the power supply device can be suppressed from increasing, and the electrode terminal Since the electrical connection can be made by spot welding and the external terminal lead plate, the number of soldering points can be reduced. In addition, although the lead plate is thin and sharp, if the lead plate is placed on the opposite side of the insulating sheet on which the battery group is placed, the presence of the insulating sheet may cause the lead plate to be damaged due to impact, etc. It is possible to prevent the plate from breaking the insulating member covering the battery and causing a short circuit.

(f) Examples An embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a perspective view of the power supply device of the present invention, Fig. 2 is an exploded perspective view thereof, Fig. 3 is a perspective view of the assembled battery, and Fig. 4 is a perspective view of the power supply device of the present invention.
The figure is a side view, and Figure 5 is a wiring diagram.
and a lid body 3.

The battery group 8 constituting the assembled battery 2 includes two 2
It is a combination of 5 battery rows, each consisting of a battery made by directly contacting the + and - electrodes to electrically connect the batteries in series, and then covering the two batteries with a paper tube 9.
Three adjacent rows of battery rows 4A, 4B, 4C
Two rows of battery rows 4 are placed in the two rows of space formed between them.
D and 4E are placed and their peripheries are fixed with tape 5. These 5 rows of battery rows have 10 batteries electrically connected in series by spot welding lead plates 6 to the electrodes of adjacent batteries at the end faces of the battery rows. The electrodes exposed on the end faces of battery rows 4A and 4C among the battery rows of
These serve as electrode terminals of the electrically connected battery group 8. One battery row 4A among the battery rows has a side circumferential surface by partially cutting out the paper cylinder 9 to expose a part of the side circumferential surface of the metal battery case, and an electric component for detecting battery temperature is installed in this exposed portion. A thermostat 7 is closely fixed with a heat conductive tape 10 such as an aluminum tape, and this thermostat 7 is located between battery examples 4C and 4E.

Further, a resin base 11 having a recess having a shape matching the curved surface formed by the side surfaces of the battery rows 4A and 4D is attached to the side surface of the battery group 8 where the battery rows 4A and 4D are located, Prevents misalignment of battery rows.

The battery group 8 and the resin base 11 are mounted on one side of a flexible insulating sheet 14 having long holes 12 and slits 13 as shown in FIG.
Battery rows 4A and 4C are arranged so that A, 4B, and 4C are in contact with each other, and lead plates a and b, which are punched out in a predetermined shape in advance, are the electrode terminals of the battery group 8.
are spot welded to the electrodes exposed on the end face of the
It is led out to the other surface of the insulating sheet 14. In this way, the battery row 4 in contact with the insulating sheet 14
Since the electrode terminals of battery group 8 were provided at A and 4C,
The lead plates a and b to be welded to the electrodes are attached to an insulating sheet 14.
The distance when deriving to the other surface of is shortened. As shown in FIG. 6, the lead plate a has a U-shaped concave portion 15 at its tip, and a T-shaped contact portion 16 at its base, which is bent vertically and spot-welded to the electrode. A connecting portion 17 is formed to which an external discharge terminal 18 is spot-welded. This external discharge terminal 1
8 is formed in a U-shaped cross section, and this U-shaped portion fits into a protrusion (not shown) formed on the bottom surface of the resin base 11, so that the lead plate a is connected to the battery group. A contact part 16 and a connecting part 17 are provided on two sides of 8.
By fixing them, it is possible to position the lead plate a on the outer surface of the insulating sheet 14, and it is also useful for fixing the battery group 8 and the resin base 11. On the other hand, since the elongated hole 12 of the insulating sheet 14 is formed to be located in the space formed between the battery rows 4A and 4B, the recess 15 of the lead plate a can be inserted through the elongated hole 12 of the sheet 14. When inserted into the space, the recess 15 does not protrude from the outer surface of the sheet 14. A U-shaped recess 19 similarly formed in the lead plate C disposed on the outer surface of the insulating sheet 14 is inserted into the elongated hole 12 of the insulating sheet 14.
Leads of diodes 20, which are electrical components for preventing backflow, are soldered to these recesses 15 and 19, respectively. Therefore, the diode 20 is located in the space between the battery rows 4A and 4B through the elongated hole 12 of the insulating sheet 14, and does not protrude from the outer surface of the sheet 14. Similarly, the lead plate b is spot-welded on the outer surface of the insulating sheet 14 to the lead plate d, one end of which is spot-welded to an external discharge terminal 21 fitted with a protrusion of the resin base 11. On the other hand, in the thermostat 7, one lead 22 is spot welded to the electrode of the battery row 4c, and the other lead 22 is spot welded to the electrode of the battery row 4c.
3 is spot welded to the lead plate e extending in a direction perpendicular to this lead 23, and the lead 23
By inserting this folded portion into the slit 13 provided in the flexible insulating sheet 14, the lead plate e is led out to the outer surface of the insulating sheet 14, and the insulating sheet 14 is curved and temporarily fixed along the side surface where the battery rows 4C and 4D of the battery group 8 are located.

In the unitized battery, tape is pasted to cover both end faces of the battery array and the surface of the insulating sheet 14 in order to fix the lead plates on the insulating sheet 14, and the insulating sheet 14 is curved. It is inserted into the main body case 1 with the lead plates c, d, and e protruding. That is, the main body case 1 is a box having an opening at one end, and has windows 24 and 25 on the bottom surface communicating with the outside as shown in FIG.
External charging terminals 26, 27, 28 and 30 are on the side wall.
are mounted side by side with their tips protruding outward from the opening and partially exposed on the outer surface of the side wall. When inserted from the side so that the insulating sheet and the side wall fitted with the external charging terminal face each other, the external charging terminals 18 and 21 formed on the assembled battery 2 are exposed through the windows 24 and 25 on the bottom of the main body case 1, respectively. In addition, the lead plates c, d, and e of the assembled battery 2 are in a state opposite to the external charging terminals 26, 27, and 28 attached to the main body case 1, respectively. These opposing lead plates c, d, and e are spot welded to external charging terminals 26, 27, and 28, respectively. After electrically connecting each other by spot welding, these electrically connected lead plates c, d, e and external charging terminals 26, 27, 28 are attached to the main body case 1.
Insert the lid 3 into the main case 1 by folding it inward.
When attached to the opening, the battery device shown in FIG. 1 is completed.

A case where the above power supply device is used as a power source for a device will be explained. When this power supply device is attached to a device, the external discharge terminals 24 and 25 located on the bottom surface of the main body case 1 come into contact with the input terminals of the device to be used, thereby enabling the device to be driven. On the other hand, when charging the power supply device, the external charging terminals 26, 27, and 28, which are glued to the charger and located on the side surface of the main body case 1, are used by bringing them into contact with the charging terminals of the charger. In this way, if the external terminals for charging and discharging are provided on different but adjacent sides of the power supply device, the external terminals will be disconnected when the power supply device is inserted into the device or charger from the wrong direction. It is safe because the user does not touch the input terminal or the charging terminal.

In addition, the power supply device with the above configuration uses a lead plate to directly electrically connect the electrode terminals of the battery group, battery parts, and external terminals, which increases the number of welding points and reduces the number of soldering points, improving work efficiency. The occurrence of electrical connection defects can be suppressed, and reliability is also improved. In addition, since the lead plate is placed between the battery group and the battery group with an insulating sheet interposed between them, there is no chance that the lead plate will tear the paper tube that covers the side surface of the battery due to an impact and come into contact with the battery, causing a short circuit. can be prevented. Furthermore, the lead plate is thinner than the lead wires, and the electric components are inserted and fixed into the spaces between the battery rows through long holes provided in the insulating sheet, so the power supply device can be made smaller.

Further, as in the above embodiment, the assembled battery is formed into a unit in advance, and when the assembled battery is inserted into the main body case, the external terminal formed on the assembled battery is exposed through the window provided in the main body case. Therefore, there is no need to separately attach external terminals to the main body case, and external terminals can be easily installed on the bottom of the main body case, where it is difficult to attach external terminals. This is effective when forming external terminals.

(g) Effects of the invention The power supply device of the invention directly electrically connects a battery group made up of a plurality of batteries arranged on one side of an insulating sheet, electrical components, and external terminals using a lead plate, and Since the lead plate for electrically connecting these is arranged on the other surface of the insulating sheet, it is possible to provide a small and highly reliable power supply device.

[Brief explanation of the drawing]

The drawings all relate to the present invention, and Fig. 1 is a perspective view of the power supply device, Fig. 2 is an exploded perspective view thereof, Fig. 3 is a perspective view of the assembled battery, Fig. 4 is a side view thereof, and Fig. 5 is a perspective view of the power supply device. 6 is an enlarged view of the main parts of the assembled battery, FIG. 7 is a plan view of the insulating sheet, and FIG. 8 is a sectional view of the main body case. 14...Insulating sheet, 8...Battery group, 7,20
...Electrical parts, 18, 21, 26, 27, 28...
...external terminal, a, b, c, d, e...lead plate,
4A, 4B, 4C, 4D, 4E...Battery row, 12
...Through hole (long hole), 15, 19...U-shaped part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A battery group consisting of a plurality of batteries arranged on one side of an insulating sheet, electrical components, and external terminals are directly electrically connected by a lead plate, and these are A power supply device characterized in that a lead plate for electrical connection is arranged on the other surface of the insulating sheet. (2) The battery group is composed of a plurality of battery rows, and two predetermined lead plates arranged on the other side of the insulating sheet have a through hole provided in the insulating sheet between the battery rows. A U-shaped portion is formed to be inserted into the space formed in the U-shaped portion, and the electrical component is held in the space by electrically and mechanically connecting and fixing the electrical component to the U-shaped portion. A power supply device according to claim (1) of the utility model registration claim, characterized in that: