JP2024049847A - Battery device - Google Patents

Abstract

A battery device that can be configured small even when a fuse is placed inside a case is provided.
[Solution] A battery device 10 includes a case 11, a plurality of unit cells 12, and a fuse 14. The plurality of unit cells 12 are arranged in parallel inside the case 11. The fuse 14 is electrically connected to the unit cells 12, and is arranged in an area A between the unit cells 12 within the case 11 where the unit cells 12 face each other.
[Selected figure] Figure 3

Description

An embodiment of the present invention relates to a battery device.

Conventionally, there are electrical devices that operate using power supplied from a battery device. The battery devices used in such electrical devices have multiple unit cells arranged inside a case, and furthermore, a fuse is built into the wiring path between the unit cells to protect against overcurrent.

In addition to being placed outside the case, fuses can also be placed inside the case, but this can make it difficult to find a place to place the fuse inside the case, or the case must be made larger to accommodate the fuse.

JP 2004-185842 A

The problem that this invention aims to solve is to provide a battery device that can be constructed in a small size even if the fuse is placed inside the case.

The battery device of the embodiment includes a case, a plurality of unit cells, and a fuse. The plurality of unit cells are arranged in parallel inside the case. The fuse is electrically connected to the unit cells and is arranged in opposing areas between the unit cells inside the case.

The battery device of this embodiment is expected to be compact even when the fuse is placed inside the case.

1 is a perspective view of a battery device according to a first embodiment; FIG. 2 is a perspective view of the battery device with the cover removed. FIG. FIG. 2 is a plan view of the battery device with the cover removed. FIG. 2 is a perspective view of the battery device with the cover removed. FIG. 2 is a perspective view of the battery device with the cover removed. FIG. FIG. 2 is a wiring diagram of the battery device. FIG. 11 is a plan view of a battery device according to a second embodiment with the cover removed.

The first embodiment will be described below with reference to Figures 1 to 8.

The battery device 10 is used, for example, in emergency lighting devices such as emergency lights and emergency exit lights that run on battery power during power outages, and in other electrical devices that run on battery power.

The battery device 10 includes a case 11, a number of unit cells 12 arranged in parallel within the case 11, a connector 13 arranged in the case 11, and a fuse 14 arranged in the case 11. In this embodiment, four unit cells 12 are used.

The case 11 is made of insulating resin and includes a case body 20 and a lid 21 attached to one side, the top side, of the case body 20.

The case body 20 has a substantially C-shaped bottom surface 22 on the other side, which is the bottom surface, and a peripheral surface 23 that is raised from the periphery of the bottom surface 22, and is open on the top surface.

The case body 20 has four battery storage sections 24 arranged in parallel in a roughly arc shape along the bottom surface 22 so that the four unit cells 12 are arranged in parallel in a roughly arc shape along the bottom surface 22.

At the upper end of the outer peripheral surface of the peripheral portion 23, at each position between adjacent battery housing sections 24, there are provided mounting sections 25 for mounting the lid 21. The mounting sections 25 have mounting holes 26 that communicate in the vertical direction, and plate-shaped claw receivers 27 provided on the outer diameter side of the mounting holes 26. Some of these mounting sections 25 are disposed between adjacent battery housing sections 24 and between the unit cells 12 housed in the battery housing sections 24, providing gaps between adjacent battery housing sections 24 and between adjacent unit cells 12.

A connector mounting portion 28 for mounting the connector 13 is provided on the upper end of the inner peripheral surface of the peripheral portion 23. The connector mounting portion 28 is provided with a mounting base portion 29 on which the connector 13 is placed, and a notch portion 30 through which the connector 13 is inserted is provided at a position on the peripheral portion 23 that is continuous with the mounting base portion 29.

A mounting portion 31 for mounting the lid 21 protrudes from the center of the mounting base 29. The mounting portion 31 has a claw portion 32 facing in the opposite direction to the notch portion 30. A plurality of mounting walls 33 for mounting the connector 13 protrude from both sides of the mounting base 29.

The lid 21 is attached to the upper surface of the case body 20 to close it. On the outer peripheral surface of the lid 21, mounting claws 34 are protruding to be attached to each mounting portion 25 of the case body 20. The mounting claws 34 are inserted into the mounting holes 26 and engage with the claw receivers 27 to attach the lid 21 to the case body 20. On the inner side of the lid 21, mounting claws 35 are protruding to be attached to the mounting portions 31 of the case body 20. The mounting claws 35 are engaged with the claw portions 32 of the mounting portions 31 to attach the lid 21 to the case body 20. On the inner surface of the lid 21, a plurality of battery pressing portions 36 that press the unit cells 12 between the lid 21 and the case body 20 are provided, and a connector pressing portion 37 that presses the connector 13 between the lid 21 and the case body 20 is provided.

The cells 12 are made of rechargeable secondary batteries such as nickel-metal hydride batteries or lithium-ion batteries. The cells 12 are formed into a cylindrical shape, for example the size of a C-cell battery, with one end surface being a positive pole 40 and the other end surface being a negative pole 41. As shown in Figures 3 and 8, in this embodiment, adjacent cells 12 are arranged with the positive pole 40 and the negative pole 41 facing in opposite directions, and the opposite polarities are connected in series by lead electrodes 42. The lead electrodes 42 are conductive metal plates that are welded to the cells 12 for electrical connection. Four cells 12 are connected in series by the lead electrodes 42.

One end of a lead wire 43 is welded and electrically connected to the positive pole 40 of the battery cell 12 at one end of the series connection, and the other end of this lead wire 43 is electrically connected to the connector 13.

A lead electrode 42 is welded and electrically connected to the negative pole 41 of the unit battery 12 at the other end of the series connection, one end of a lead wire 44 is welded and electrically connected to this lead electrode 42, the other end of this lead wire 44 is welded and connected to one end of the fuse 14, one end of a lead wire 45 is welded and electrically connected to the other end of the fuse 14, and the other end of this lead wire 45 is electrically connected to the connector 13.

The connector 13 also has a connector body 50 that is attached to the connector mounting portion 28 of the case 11, and a connector connection portion 51 that protrudes from the cutout portion 30 to the outside of the case 11. A pair of connector terminals are arranged within the connector connection portion 51.

In the connector main body 50, an insertion hole 52 is formed on the end face side opposite to the protruding direction of the connector connection part 51, through which the lead wires 43, 45 at both ends connected in series to the multiple unit cells 12 are inserted. The lead wires 43, 45 inserted into the insertion hole 52 are electrically connected to a pair of connector terminals in the connector 13. Furthermore, a fitting groove 53 is formed in the center of the end face side of the connector main body 50, which fits into the mounting part 31 protruding from the connector mounting part 28. With this fitting groove 53 fitted into the mounting part 31, the mounting part 31 is positioned in the center of the width of the insertion hole 52, and the lead wires 43, 45 inserted into the insertion hole 52 are separated in the width direction by the mounting part 31 and inserted.

On both sides of the connector body 50, there are engagement parts 54 that engage with the mounting walls 33 on both sides of the connector mounting part 28.

The connector connection part 51 is connected to a connector of an electrical device such as a lighting device.

Fuse 14 is a current fuse that melts when a current of a predetermined value or more flows. Fuse 14 is electrically connected to the middle of wiring 60 that connects unit cell 12 and connector 13, and is electrically connected between lead wires 44 and 45.

The fuse 14 is disposed between the two unit cells 12 that face the insertion opening 52 of the connector 13, in an area A between these two unit cells 12 that face each other. In area A, a part of the wiring 60 connected to the fuse 14 is also disposed together with the fuse 14. The fuse 14 may be disposed in area A supported by the wiring 60, or may be disposed in area A held by a separate fuse holding member.

When assembling the battery device 10, the four cells 12, the lead electrodes 42, the lead wires 43, 44, 45, the connector 13, and the fuse 14 are first electrically connected to form a battery unit, and this battery unit is then inserted into the case body 20, and the lid 21 is attached to cover the case body 20.

When inserting the battery unit into the case body 20, each battery cell 12 is inserted into each battery housing section 24 of the case body 20, and the fuse 14 and the lead wires 44, 45 connected to this fuse 14 are placed in area A between the two battery cells 12 that face the insertion opening 52 of the connector 13. Furthermore, the connector 13 is placed in the connector attachment section 28. At this time, the lead wires 44, 45 connected to the connector 13 are placed separately on both sides in the width direction of the attachment section 31 that protrudes from the connector attachment section 28.

By attaching the lid 21 over the case body 20, each battery cell 12 and connector 13 are sandwiched and held between the case body 20 and the lid 21.

In the battery device 10 configured in this manner, the fuses 14 are disposed in the area A between the unit cells 12 facing each other inside the case 11, so the fuses 14 can be configured to be small even when disposed inside the case 11.

Between the unit cells 12 and the unit cells 12, there is a mounting portion 25 for mounting the lid 21 to the case body 20 of the case 11, so there is a gap between the unit cells 12 and the unit cells 12, and this gap can be effectively used to place the fuse 14.

A portion of the wiring 60 connected to the fuse 14 is also arranged in the area A between the unit cells 12, making it easier to arrange the wiring 60 within the case 11 and allowing the wiring 60 to be short.

The connector 13 and the fuse 14 are positioned opposite each other, making it easy to arrange the wiring 60 inside the case 11 and shortening the length of the wiring 60.

As shown in FIG. 9, in the second embodiment, even in the case of a battery device 10 that houses a larger number of unit cells 12 in the case 11, the fuses 14 can be arranged in the area A between the unit cells 12 facing each other in the case 11, allowing the fuses 14 to be arranged in a small size even when placed in the case 11.

Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims.

REFERENCE SIGNS LIST 10 Battery device 11 Case 12 Cell 13 Connector 14 Fuse 60 Wiring Area A

Claims (3)

Case and;
a plurality of unit cells arranged in parallel within the case;
a fuse electrically connected to the battery cell and disposed in an opposing area between the battery cells within the case;
A battery device comprising: The battery device according to claim 1 , further comprising a wiring electrically connected to the fuse, the wiring being partially disposed in the area in the case where the fuse is disposed. The battery device according to claim 1 , further comprising a connector arranged in a position on the case opposite the fuse.

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