JPH11144695A - Pack battery with built-in water soak detection seal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly judge that water invades in a case without peeling of a water soak detection seal. SOLUTION: A water soak detection seal 7 is labeled on an rectangular lithium battery 4 held in outer cases 1, 2 of a pack battery. A detection port 12 is drilled on the surface of the outer case 1 formed opposed to the water soak detection seal 7 and on the surface a transparent label seal 13 is labeled. The battery 4 is formed rectangular, and on the surface of an outer can of the battery 4 the water soak detection seal 7 is labeled. The transparent covering label member is formed as a label seal 13 for indicating the rating of a pack battery.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack having a submergence determination sticker attached thereto.

[0002]

2. Description of the Related Art Pack batteries are mainly used as power sources for portable equipment. In recent years, information communication devices such as mobile phones have spread rapidly, and pack batteries containing high-energy-density lithium-ion batteries have been developed in response to demands for smaller and lighter devices and longer continuous use times. Have been.
A battery pack containing a lithium-ion battery has a board on which an overcharge / overdischarge prevention circuit is mounted so that charging and discharging can be performed safely.

[0003] Further, the battery pack is molded into a shape conforming to the shape of various portable devices.
It is formed at a predetermined position by being routed by a lead plate or the like so as to correspond to the contact position on the device side.

As described above, inside the battery pack, in addition to a battery serving as a power supply, a printed board on which elements and the like are mounted, and further, a lead board for electrically connecting the battery, the printed board and the terminals, and the like. Many electric parts are stored.

[0005] On the other hand, since portable devices such as portable telephones are often used outdoors, there is a possibility that rainwater may enter the battery pack in rainy weather. When rainwater enters, a short circuit occurs between the electric components, which may cause an accident such as abnormal heat generation during use.

Therefore, as shown in FIG. 1, a method is employed in which a submergence determination seal 7 is affixed to a battery pack to check whether water droplets or the like have adhered to the battery pack.
The battery pack is used as a power source of a mobile phone, and is mounted on the battery mounting surface of the mobile phone with a substantially flat mounting surface having terminals. The back surface of the mounting surface forms an appearance together with the mobile phone, and has a rounded shape.

When the battery pack is mounted on a mobile phone, the mounting surface having the terminals is not exposed to the outside.
Although water does not directly enter, water may enter along the periphery of the case 1 from the gap between the battery mounting surface of the battery pack and the battery mounting surface of the device. If water adheres to the battery mounting surface, there is a possibility that the water may further enter the inside of the battery pack from the terminal portion.

For this reason, the water immersion judging seal 7 is attached to the mounting surface side to check for water intrusion. The submergence determination seal 7 is colored when it gets wet with water, and then keeps its colored state even when it dries, so that it can be determined whether or not it is wet with water. If it is wet, it can be used for a predetermined period until it dries, for example, to suspend use and prevent a short circuit accident.

[0009]

However, in the battery pack shown in FIG. 1, since the submergence determination seal 7 is attached to the outer surface of the case 1, it is necessary to accurately determine whether water has penetrated into the case 1. Cannot be determined. Further, there is a disadvantage that the seal 7 is peeled off because it is attached to the outer surface.

Accordingly, the present invention provides a battery pack that can accurately determine that water has entered the interior of the case without the fear of the water immersion determination seal coming off.

[0011]

According to the present invention, a battery is housed in an outer case, and a submergence determination seal is attached thereto.
A determination window is formed at a position on the surface of the outer case opposite to a position where the submergence determination seal is attached, and a transparent covering member that covers the determination window is provided.

Further, the battery is a prismatic type, and the submergence determination seal is attached to a surface of an outer can of the prismatic type battery.

Still further, the transparent covering member is a label sticker indicating a rating of the battery pack.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. The battery pack according to the present invention is used as a power source for a mobile phone. The external appearance of this battery pack is constituted by the exterior cases 1 and 2 divided into two parts. The outer case 1 has a substantially flat surface, and the outer case 2 has a rounded shape according to the appearance of the mobile phone. The outer case 1 having a substantially flat surface includes a terminal window 11 from which the terminal 3 is exposed, and is mounted on a battery mounting surface of the mobile phone.

In the outer cases 1 and 2, a flat rectangular lithium ion battery 4, the terminal 3, and a printed circuit board 5 on which elements constituting an overcharge / overdischarge prevention circuit are mounted,
Further, a lead plate 6 and the like for electrically connecting them are housed. A submergence determination seal 7 is attached to a longitudinal side surface of the outer can of the flat prismatic lithium ion battery 4.

The exterior case 1 is provided with a judgment window 12 so that when the exterior cases 1 and 2 are connected, the water immersion judgment seal 7 is exposed through the judgment window 12. Further, a transparent label seal 13 is attached to the exterior case 1 so as to cover the determination window 12. In order to absorb the thickness of the label seal 13, the outer case 1 is configured such that the portion to which the label seal 13 is applied is reduced by the thickness of the seal so that the surface becomes flush when the seal is applied. .

The label seal 13 is transparent or translucent so that the submergence determination seal 7 can be seen. The label sticker 13 is printed with the model name and rating of the battery pack and is displayed.

The submergence determination seal 7 is colored when it gets wet with water, and then keeps its colored state even when it dries, so that it can be determined whether or not it is wet with water. By affixing the submergence determination seal 7 inside the outer case of the battery pack, it is possible to accurately determine whether water has entered the case. Further, since the battery is attached to the battery 4 in the case, the battery does not come off. And although it is stuck inside the case, the judgment window 1
2 and the judgment window 12 is covered with a transparent label seal 13, so that the submergence judgment seal 7 can be easily checked from the outside, and the judgment window 12 is closed by closing the label seal 13. Despite the drilling, no water can enter from here.

The judgment window 12 is provided on the outer case 1.
It is provided on the side. Since the outer case 1 is a mounting surface for the mobile phone, when the battery pack is mounted on the mobile phone, the judgment window 12 does not appear in the appearance. Therefore, the appearance of the mobile phone is not impaired.

FIG. 4 shows another embodiment of the present invention. In the exterior case 1 shown in this figure, only the portion where the judgment window 12 is formed is further lowered one step, and a transparent sheet 14 is attached here. Then, a label seal 15 is attached thereon. The label seal 15 is provided with a determination hole 16 from which the submergence determination seal 7 can be confirmed.

As a result, it is not necessary to make the label seal 15 transparent or translucent, and a colored seal can be used. As a result, the model name and rating of the battery pack can be easily displayed, and characters and symbols that can be easily identified can be printed without being affected by the color scheme of the outer case. In this case as well, the exterior case 1 has a portion to which the transparent sheet 14 is attached, which is one step lower by the thickness thereof, so that the case 1 is flush when the transparent sheet 14 and the label seal 15 are attached. It is supposed to be.

[0022]

According to the present invention, it is possible to accurately determine whether water has penetrated into the case by affixing the submergence determination seal to the exterior case of the battery pack.
In addition, since the judgment window is provided on the case and the transparent covering member is provided thereon, it is possible to prevent water from entering through the judgment window and easily check the seal from the outside.

Furthermore, since the submergence determination seal is affixed to the rectangular battery housed in the battery pack, it can be easily affixed and hardly peeled off.

Further, since the transparent covering member is also used as a label sticker indicating the rating of the battery pack,
There is no increase in the number of parts.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a conventional battery pack.

FIG. 2 is an external perspective view of the battery pack of the present invention.

FIG. 3 is an exploded perspective view of the battery pack of the present invention.

FIG. 4 is an exploded perspective view of a battery pack according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 2 Outer case 3 Terminal 4 Lithium ion battery 7 Submergence judgment seal 12 Judgment window 13, 15 Label seal 14 Transparent sheet

Claims (3)

[Claims] 1. A submergence determination seal is attached to a battery in an outer case, and a determination window is formed on a surface of the outer case opposite to a position where the submergence determination sticker is attached. And a transparent cover member for covering the determination window is provided. 2. The battery pack according to claim 1, wherein the battery has a rectangular shape, and the submergence determination seal is attached to a surface of an outer can of the prismatic battery. 3. The battery pack according to claim 1, wherein the transparent covering member is a label seal indicating a rating of the battery pack.