JPH0636212U - Battery pack - Google Patents

Abstract

(57) [Abstract] [Purpose] Securely secure the protective element 1 in the correct position.
The lead wire 1A of the protection element 1 is prevented from being short-circuited to operate accurately. [Structure] A battery pack includes a plurality of batteries 2, a case 4 for accommodating the batteries 2, a protective element 1 for the battery 2 arranged between the batteries 2, and a protective element 1 arranged between the batteries 2. And an insulating holder 6 to be installed. The insulating holder 6 is sandwiched between the batteries 2, and the lead wire 1A of the protective element 1 is also sandwiched between them to fix the protective element 1. [Effect] The insulating holder 6 is used for the lead wire 1 of the protection element 1.
Since A is sandwiched and the protection element 1 is disposed between the batteries 2,
The protection element 1 can be reliably fixed in a correct position. Further, since the lead wire 1A is sandwiched and fixed, the short circuit of the lead wire 1A can be effectively prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a battery pack containing a plurality of batteries, and more particularly to a battery pack containing a protective element such as a temperature fuse.

[0002]

[Prior art]

 In recent years, the number of cordless products such as portable video cameras, transceivers, and mobile phones has increased, and a battery pack that integrates a plurality of secondary batteries is used as the power source for these products. These battery packs incorporate various protective elements in order to enhance safety. In addition to a thermostat, a fuse, a diode, a thermistor, etc. are used for the protection element. These protection elements are connected in series with the battery to protect the battery from heat generation and overcurrent. For example, a fuse prevents heat generation and rupture caused by incorrect use of the battery, and a thermostat shuts off the circuit when the battery heats up to protect the battery. The diode protects the reverse connection of the battery, and the temperature sensor such as the thermistor outputs the temperature signal of the battery to the charging device to control the charging state.

A conventional battery pack has a structure shown in FIGS. 1 and 2, and a protective element 1 is arranged between batteries. As shown in FIG. 1, a protective element 1 having lead wires 1A at both ends is arranged between batteries 2 by bending one lead wire 1A. An insulating tube 3 is attached to the protective element 1. The insulating tube 3 prevents the two lead wires 1A from coming into contact with each other and short-circuiting. Also, contact between the lead wire 1A and the battery 2 is prevented. As shown in FIG. 2, the protective element 1 thus processed is provided between two batteries 2 by spot welding the lead wires 1A to both ends of the battery 2. In order to widen the space between the batteries 2 in which the protective element 1 is interposed, the case 4 is provided with ribs 5 projecting inward. The rib 5 has a chevron shape so that it can be inserted between the batteries 2. In this way, the protective element 1 arranged between the batteries 2 is fixed to the battery 2 with a tape.

[0004]

[Problems to be solved by the device]

 In the battery pack having this structure, the protection element 1 cannot be securely fixed. Further, since the two lead wires 1A of the protection element 1 are extremely close to each other, there is a drawback that short-circuiting is likely to occur. When the lead wire 1A of the protection element 1 is short-circuited, the protection element 1 cannot protect the battery 2 and the battery cannot be used safely.

Further, a battery pack in which a protective element is set via an insulating holder is described in JP-A-64-35854. The battery pack described in this publication has an insulating holder 6 sandwiched between two batteries 2, as shown in FIG. Both surfaces of the insulating holder 6 have a shape along the surface of the cylindrical battery 2. The insulating holder 6 has a terminal plate 7 fixed to the upper surface thereof, and a concave portion 8 containing the protective element 1 therein is provided on the lower surface thereof as shown in the bottom view of FIG. The protective element 1 is placed and fixed in the recess 8. In order to prevent a short circuit between the two lead wires 1A of the protection element 1, a partition wall 9 is projected between the lead wires 1A.

The insulating holder 6 having this structure is restricted by the shape of the protective element to be set. For example, as shown in FIG. 1, the protective element 1 having the lead wires 1A at both ends is securely fixed to the recess 8 of the insulating holder 6 shown in FIG. 4 and the lead wire 1A is not short-circuited. Difficult to do. Furthermore, since the main body of the protection element 1 is inserted into the concave portion 8 and fixed, in the case of a sensor or the like that detects temperature, there is a drawback that the temperature sensing portion is covered by the insulating holder 6 and it becomes difficult to perform temperature sensing accurately. is there.

The present invention was developed with the object of further solving this drawback. An important object of the present invention is to provide a battery pack in which the protection element can be reliably fixed in a state in which it can be operated accurately, and further, a short circuit of lead wires can be effectively prevented.

[0008]

[Means for Solving the Problems]

 The battery pack of the present invention has the following configuration in order to achieve the above object. That is, the present invention provides a plurality of batteries 2, a case 4 for accommodating the batteries 2, a protective element 1 for the battery 2 arranged between the batteries 2, and a protective element 1 between the batteries 2. This is an improved battery pack including an insulating holder 6 to be attached. The battery pack of this invention has a unique structure in which the insulating holder 6 is sandwiched between the batteries 2 and the lead wire 1A of the protective element 1 is also sandwiched to fix the protective element 1.

[0009]

[Action]

 In the battery pack of this invention, the lead wire 1A of the protective element 1 such as a fuse is sandwiched, and the protective element 1 is arranged between the batteries 2. The protective element 1 with the lead wire 1A sandwiched therebetween is securely fixed between the battery 2 and the battery 2 via the two lead wires 1A, and accurately fixed at a predetermined position. In addition, since the lead wires 1A are fixed, it is possible to prevent them from coming into contact with each other and short-circuiting.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a battery pack for embodying the technical idea of the present invention, and the battery pack of the present invention has a component type, a material, a shape, a structure, and an arrangement. It is not specific to those listed below. The battery pack of this invention can be modified in various ways within the scope of the utility model registration claim.

Further, in this specification, in order to facilitate understanding of the scope of claims for utility model registration, the numbers corresponding to the members shown in the examples are referred to as “column for claims for utility model” and “column for action”. , And "members for solving the problems" are added. However, the members indicated in the claims for utility model registration are not specified as the members of the embodiment.

The battery pack shown in FIG. 5 includes four batteries 2, a case 4 for accommodating these batteries 2, a protective element 1 for the battery 2 arranged between the batteries 2, and a protective element 1. And an insulating holder 6 arranged between the batteries 2.

The four batteries 2 are connected in series via battery leads. The + pole of the battery 2 on the most + side is, as shown in FIGS. 6 and 7, the + terminal plate 7 provided on the lower surface of the insulating holder 6, and the − terminal of the battery 2 on the − side is −. Is connected to the terminal board 7. The terminal board 7 is fixed to the insulating holder 6 for fixing the protection element 1.

The case 4 is made of plastic and is formed into a box shape for accommodating the four batteries 2 arranged in parallel. The case 4 is composed of an upper case 4A and a lower case 4B that are vertically divided into two parts. In the state where the battery 2 is stored, the upper case 4A and the lower case 4B are connected by the edge of the peripheral wall to store the battery 2. In the figure, a terminal window 10 is opened in the lower case 4B to expose the terminal plate 7 to the outside. The terminal window 10 is opened according to the position of the terminal plate 7 fixed to the insulating holder 6.

The insulating holder 6 is shown in the front view of FIG. 6 and the side view of FIG. 7. The insulating holder 6 shown in these figures is arranged between the batteries 2 by sandwiching the lead wire 1A of the protection element 1. In order to sandwich the protective element 1, the insulating holder 6 is divided into two sandwiching pieces 6A on the left and right in FIG. The sandwiched pieces 6A divided into two are connected via a hinge 6B which is bendable. The hinge 6B is made of plastic and integrally molded with the sandwiching piece 6A. The sandwiching piece 6A is provided with a notch at a portion where the protective element 1 is sandwiched. The sandwiching piece 6A sandwiches the lead wire 1A with the protection element 1 positioned in the notch. In the insulating holder 6 in which the protective element 1 is located in the cutout in this way, it is not necessary to provide a heat insulating wall between the protective element 1 and the battery 2. This structure has a feature that the protection element 1 that operates at temperature can be operated accurately and quickly. The sandwiching piece 6A has a sandwiching rib 6C for the lead wire 1A in order to dispose the protective element 1 at a fixed position. The sandwiching rib 6C has a groove 6D at a sandwiching position of the lead wire 1A. As shown in FIG. 8, the groove 6D of the sandwiching rib 6C is provided at a position to sandwich the U-bent one lead wire 1A and the straight lead wire 1A. The insulating holder 6 of this structure fixes the protective element 1 in place by sandwiching the lead wire 1A as described below. As shown in FIG. 8, one lead wire 1A of the protection element 1 is bent in a U shape. As shown in the upper part of FIG. 6, the sandwiching rib 6C of the insulating holder 6 is opened, and the protective element 1 in which the lead wire 1A is bent U is set on the sandwiching piece 6A on the right. At this time, the lead wire 1A is guided to the groove 6D of the sandwiching rib 6C, and the protection element 1 is set on the sandwiching piece 6A. As shown in the lower part of FIG. 6, the hinge 6B is bent and the two sandwiching pieces 6A are closed. The closed sandwiching ribs 6C sandwich the lead wire 1A of the protection element 1 with the sandwiching ribs 6C that are in contact with each other. At this time, the lead wire 1A of the protective element 1 is guided to the groove 6D of the sandwiching rib 6C. The two sandwiching pieces 6A sandwiching the lead wire 1A of the protective element 1 are structured to be aligned at predetermined positions. In order to realize this, the insulating holder 6 shown in the upper part of FIG. 6 has a protrusion 6E on the contact surface of the right sandwiching piece 6A and a recess 6F on the contact surface of the left sandwiching piece 6A. It is provided. When the left and right sandwiching pieces 6A are put together, the protrusions 6E are fitted into the recesses 6F, and the two sandwiching pieces 6A are connected without displacement. Further, as a structure in which the protrusion 6E is fitted into the recess 6F so as not to easily come out, the two sandwiching pieces 6A can be connected via the protrusion 6E and the recess 6F.

The insulating holder 6 for sandwiching the protective element 1 as described above is sandwiched between the batteries 2 arranged in parallel and housed in the case 4. In order to be sandwiched between the cylindrical batteries 2, as shown in FIG. 7, the outer surface of the sandwiching piece 6A has a shape along the cylinder of the battery 2, that is, a shallow U-shaped groove extending vertically. 6D is formed in the shape. The insulating holder 6 of this shape has a feature that it can be arranged in the case 4 without any displacement in a state where the batteries 2 are fitted on both sides.

In this way, the protective element 1 sandwiched between the insulating holders 6 is arranged between the batteries 2, and the lead plate welded to the ends of the lead wires 1 A is spot-welded to the electrodes of the battery 2. . In this state, the protection element 1 mounted between the batteries 2 detects, for example, a fuse that is blown by an excessive current or temperature, a thermostat that is cut off by temperature, a diode that cuts off current when reversely connected, and a temperature of the battery 2. A temperature sensor such as a thermistor is used. A protective element 1 such as a fuse, a thermostat and a diode is connected in series with the battery 2. The temperature sensor is not connected in series with the battery 2 and outputs a temperature signal to the outside of the battery pack via a special terminal.

The insulating holder 6 for sandwiching the protective element 1 and fixing it between the batteries 2 can also be used as a base for fixing the terminal plate 7 of the battery 2. The insulating holder 6 used together with the base of the terminal board 7 fixes the terminal board 7 to the lower surface in FIGS. 6 and 7, for example. The terminal window 10 fixed to the insulating holder 6 is housed in the case 4 and exposed to the outside of the battery pack through the terminal window 10 of the case 4.

As shown in FIG. 5 to FIG. 7, the insulation holder 6 for taking out the lead wire 1A of the protection element 1 vertically can prevent the lead wires 1A from being short-circuited with each other because the lead wires 1A can be separated from each other. it can.

[0020]

[Effect of device]

 The battery pack of this invention has a feature that the protective element can be securely fixed at an accurate position. The reason is that the lead wire of the protective element is sandwiched and fixed by an insulating holder arranged between the batteries. The protective element with the lead wire sandwiched is fixed in place so as not to move through the lead wire.

Further, since the lead wire of the protection element is sandwiched in the battery pack of the present invention, it is possible to effectively prevent the two lead wires provided in the protection element from being short-circuited. This is because the lead wire can be fixed without moving. Therefore, there is a feature that the protection element can be operated reliably.

Furthermore, since the battery pack of the present invention holds the protective element in place by sandwiching the lead wire, the insulating tape or the wall between the protective element and the battery is omitted if necessary. You can also For this reason, when a temperature sensor or thermostat that detects the temperature of the battery is used as the protection element, there is a feature that the operation of the protection element can be performed accurately and quickly.

[Brief description of drawings]

FIG. 1 is a front view showing a bent state of a lead wire of a protection element incorporated in a conventional battery pack.

FIG. 2 is a cross-sectional view of a conventional battery pack in which the protection element shown in FIG. 2 is arranged between batteries.

FIG. 3 is a perspective view of a conventional battery pack.

FIG. 4 is a bottom view of the insulating holder of the battery pack shown in FIG.

FIG. 5 is an exploded perspective view showing an example of the battery pack of the present invention.

6 is a front view showing a state in which a protection element is attached to the insulating holder shown in FIG.

7 is a side view of the insulating holder shown in FIG.

FIG. 8 is a front view showing a bent state of a lead wire of a protective element sandwiched between insulating holders.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Protective element 1A ... Lead wire 2 ... Battery 3 ... Insulation tube 4 ... Case 4A ... Upper case 4B ...
Lower case 5 ... Rib 6 ... Insulation holder 6A ... Clamping piece 6B ...
Hinge 6C ... Clamping rib 6D ... Groove 6E ... Projection 6F ... Recess 7 ... Terminal plate 8 ... Recess 9 ... Partition 10 ... Terminal window

Claims (1)

[Scope of utility model registration request] 1. A battery pack comprising a plurality of batteries, a case for accommodating the batteries, a battery protection element disposed between the batteries, and an insulating holder having the protection element disposed between the batteries. The battery pack is characterized in that the insulating holder is sandwiched between the batteries, and the lead wire of the protective element is sandwiched to fix the protective element.