JP2003272586A - Terminal structure for battery pack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide terminal structure for a battery pack preventing the entrance of dust and water drops into the inside by preventing the generation of gaps between a battery pack body and a portion of a discharge terminal exposing to the outside of the battery pack body even if plastic molding is not so accurate. <P>SOLUTION: This terminal structure for a battery pack body comprises an upper cover and a lower cover housing a rechargeable lithium ion battery and a protection circuit board electrically protecting the battery, supplying electric power to or receiving it from an outside electronic equipment body, and detachably connected to the electronic equipment body, and in order to closely contact the discharge terminal of the protection circuit to a discharge terminal window of the battery pack from the inside, a spacer is arranged between the protection circuit board and the inside of the upper cover. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved battery pack terminal structure in which a discharge terminal can be closely adhered to a discharge terminal window of a battery pack body having a lithium ion battery therein.

[0002]

2. Description of the Related Art Recently, mobile phones have been made smaller and lighter, and the same is true of a battery pack body which is detachably attached to and receives electric power for a telephone function. This battery
A lithium ion battery that can be charged and discharged and a protection circuit board that has a function of electrically protecting the lithium ion battery and supplying power to an internal circuit of the mobile phone body are provided inside the pack body.

Since the above-mentioned battery pack body is very thin and small in size, considerable arrangement is required to dispose the lithium ion battery and the protection circuit board inside. In particular, a battery with a short horizontal and vertical dimension and a thin structure
In the case of the main body of the pack, the thin lithium-ion battery and the protective circuit board arranged inside are inevitably in a structure in which they are partially stacked vertically.

In such a case, extremely high precision is required for the dimensions of each part, and this precision can be realized by design, but if this is plastic-molded, a dimensional error will inevitably occur. Therefore, the upper lid and the lower part constituting the battery pack body are inevitable. The assembly with the lid is not sufficient, and it is very difficult to align the discharge terminals even among the charge terminals and discharge terminals exposed to the outside of the battery pack body.

If the alignment of the discharge terminals is not sufficient, a gap is created at this location, and dust, water droplets, etc. are likely to enter the interior, thus causing a failure. In addition, the dimensional error of each part, that is, the overlap with the lithium ion battery and the protection circuit board, affects the combination of the upper lid and the lower lid, and if both lids are ultrasonically welded, sufficient bonding may not be possible or the surface may not be joined. It causes lumpiness and deteriorates the yield as a product.

Therefore, when combining the upper lid and the lower lid,
In particular, if a means to correct the discharge terminal of the protection circuit board so that the discharge terminal of the protection circuit board can be closely adhered from the inside to the discharge terminal window is used, the design of the drawing is sufficient and even if the dimensions are slightly roughened by plastic molding, it is good. We paid attention to the fact that assembly is possible at the discharge terminal.

[0007]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to solve the problem of battery
(EN) A terminal structure of a battery pack that prevents a gap from being formed between the battery pack body and a discharge terminal exposed outside the pack body and prevents dust and water droplets from entering the inside.

[0008]

In order to solve the above-mentioned problems, one means of the present invention is to provide a rechargeable lithium ion battery and a battery that electrically protects this battery and externally supplies electric power to an electronic equipment body. In the terminal structure of the battery pack main body, which has a structure in which the electronic device main body is detachable from and consists of an upper cover and a lower cover for accommodating a protective circuit board for receiving and supplying
A spacer is arranged between a member other than the above-mentioned member in order to bring the member exposed to the outside from the pack body into close contact with the exposed portion,

The second means is composed of a rechargeable lithium-ion battery, an upper lid and a lower lid for accommodating an electric main body of the battery for electrically protecting the battery and an external electronic equipment body and a protection circuit board for receiving electric power. In the terminal structure of the battery pack body which is detachable from the electronic equipment body, a protection circuit board and an inner side of the upper lid are provided so that the discharge terminals of the protection circuit are closely attached to the discharge terminal windows of the battery pack body from the inside. Spacer is placed between

A third means is composed of a rechargeable lithium-ion battery, an upper lid and a lower lid for accommodating an electric main body of the battery for electrically protecting the battery and an external electronic equipment body and a protection circuit board for receiving electric power. In the terminal structure of the battery pack body which is detachably attached to the electronic device body, a protection circuit board and an inner side of the upper lid are provided so that the charging terminals of the protection circuit are closely attached to the charging terminal windows of the battery pack body from the inside. Spacer is placed between

The fourth means is composed of a rechargeable lithium-ion battery, an upper lid and a lower lid for accommodating an electric main body of the battery for electrically protecting the battery and an external electronic equipment body and a protection circuit board for receiving electric power. In the terminal structure of the battery pack main body which is detachable from the electronic equipment main body, the protection circuit board and the protection circuit board are provided in order to closely contact the charging and discharging terminals of the protection circuit with the charging and discharging terminal windows of the battery pack main body from inside. A spacer is arranged between the upper lid and the inside.

[0012]

By arranging the above spacers, the terminals can be brought into close contact with the inside of the battery pack even if the dimensions are insufficient, and therefore dust, water droplets, etc. can be prevented from entering the inside of the battery pack. It is a terminal structure.

[0013]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a battery pack body 1 mounted on the back side of a mobile phone, for example, and this battery pack body 1 is composed of an upper lid 2 and a lower lid 3. The battery pack body 1 has a protection circuit 5 having a discharge terminal 4 inside and a lithium-ion battery 6 arranged vertically.

In this case, the discharge terminal 4 is partially exposed from the discharge terminal window 7 of the lower lid 3 and has a structure capable of electrically conducting to the electrode of the mobile phone body. Reference numeral 8 is a terminal seat that electrically insulates the left and right discharge terminals 4. A spacer 9 is arranged at a position corresponding to the protection circuit 5 and the discharge terminal 4 on the back side of the upper lid 2. The spacer 9 is arranged with its thickness adjusted so that there is no gap between the discharge terminal 4 and the discharge terminal window 7. As a result, it is possible to realize assembly with no gap even if the dimensions are slightly rough in plastic molding.

The discharging terminal 4 is not limited to the discharging terminal 4 and may be a charging terminal, or may be used between other members. Further, the spacer 9 may have adhesiveness on both sides, or of course, may be on one side, and a material having electrical insulation may be adopted if necessary.

[0017]

As described above, according to the present invention, since the spacer is disposed between the members, particularly between the protective circuit board and the upper lid, which positionally corresponds to the discharge terminal, the discharge terminal can be firmly attached to the discharge terminal window. There is an effect that it is possible to sufficiently correct rough dimensions.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a battery pack as an embodiment of the present invention.

FIG. 2 is a schematic view from the direction of arrow A in FIG.

[Explanation of symbols]

1 Battery pack body 2 Top lid 3 Lower lid 4 discharge terminals 5 Protection circuit 6 batteries 7 Discharge terminal window 8 terminal seat 9 spacers

Claims (4)

[Claims] 1. An electronic device main body comprising an upper lid and a lower lid for accommodating a chargeable / dischargeable lithium ion battery and an external electronic equipment main body for electrically protecting the battery and a protection circuit board for receiving electric power. In the terminal structure of the battery pack body having a detachable structure, a spacer is arranged between the battery pack body and a member other than the member in order to bring the member exposed to the outside into close contact with the exposed portion. Battery pack terminal structure characterized by. 2. An electronic device main body comprising a rechargeable lithium ion battery and an upper lid and a lower lid for accommodating an electric device main body for electrically protecting the battery and an external electronic device main body and a protection circuit board for receiving electric power. In the terminal structure of the battery pack body having a detachable structure, a spacer is provided between the protection circuit board and the inside of the upper lid in order to closely contact the discharge terminal of the protection circuit with the discharge terminal window of the battery pack body. The terminal structure of the battery pack is characterized in that 3. An electronic device main body comprising an upper lid and a lower lid for accommodating a chargeable / dischargeable lithium ion battery and an external electronic equipment main body for electrically protecting the battery and a protection circuit board for receiving electric power. In the terminal structure of the battery pack body having a detachable structure, a spacer is provided between the protection circuit board and the inside of the upper lid in order to closely contact the charging terminal of the protection circuit with the charging terminal window of the battery pack body from the inside. The terminal structure of the battery pack is characterized in that 4. An electronic device main body comprising an upper lid and a lower lid for accommodating a chargeable / dischargeable lithium ion battery and an external electronic equipment main body for electrically protecting this battery and a protection circuit board for receiving electric power. In the terminal structure of the battery pack body having a detachable structure, the protection circuit board and the inside of the upper lid are provided so that the charging and discharging terminals of the protection circuit are closely attached to the charging and discharging terminal windows of the battery pack body from the inside. A terminal structure for a battery pack, characterized in that a spacer is arranged between the terminals.