JP2003331821A - Lead plate structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lead plate structure for connecting a lead plate led from the negative pole of a flat square lithium ion battery to the other electrode without being short-circuited to the positive pole of the battery. <P>SOLUTION: This lead plate structure comprises the flat square lithium ion battery, a lead plate member having a groove extending near the negative side of the battery to a side edge with a bent at the corner part of the battery, and the lead plate housed in the groove of the lead plate member and having one end fixed to the negative side by spot welding and the other end fixed to the other electrode. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead plate structure for fixing a lead plate spot-welded to a negative pole of a flat prismatic lithium-ion battery to the periphery of the battery.

[0002]

2. Description of the Related Art Portable electronic devices, such as mobile phones, have become lighter and smaller, and have various shapes and colors. In particular, when the mobile phone becomes thin, the battery pack that supplies power to the mobile phone cannot be made thin and miniaturized so that the appearance of the mobile phone cannot be matched. When a thin, square, flat lithium ion battery is housed in a case to form a battery pack, the battery pack is required to be as thin as possible. Will be placed.

One end of the lead plate is spot-welded and fixed to the negative electrode of the battery, while the other end is elongated and laid around the periphery of the battery to be soldered and fixed to an electrode such as a printed circuit board. There is a concern that it will not be stable and will sway to the left and right.Of course, the positive electrode of the battery and the lead plate will be insulated via an electrical insulating material, but there is a concern that the lead plate will short-circuit to the positive electrode through the insulating material due to vibration or the like. is there.

[0004]

The problem to be solved by the present invention is to provide a lead plate structure in which a lead plate derived from the negative electrode of a flat or prismatic lithium-ion battery is connected to the other electrode without short-circuiting to the positive electrode of the battery. Is provided.

[0005]

A flat or prismatic lithium ion battery, a lead plate member having a groove extending from the vicinity of the negative side of the battery to a side edge by bending at a corner of the battery, and the lead plate A lead plate structure, characterized in that the lead plate is housed in the groove of the member and has one end fixed to the minus side by spot welding and the other end fixed to the other electrode.

[0006]

The lead plate is housed in the groove of the lead plate member and attached to the periphery of the battery by the adhesive means so that the lead plate is not short-circuited to the positive side of the battery.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the accompanying drawings, FIG. 1 and FIG. Reference numeral 1 is a lithium-ion battery, which is flat and square and is formed in a plate shape. Around the battery 1, a positive electrode 2 and a negative electrode 3 are formed on the top. When forming a thin pack that is restricted in the thickness direction of the battery 1, the lead plate 4 is inevitably arranged on the periphery of the battery 1. That is, the lead plate 4
Is thin and plate-shaped and spot-welded to the positive electrode 3 of the battery 1. Although not shown, the tip reaches the side edge of the battery 1 from the spot welded to the negative electrode 3 and is fixed to the electrode of the printed board.

Therefore, since both ends of the lead plate 4 are fixed to the electrodes but there is a risk of swinging in the middle, the lead plate 4 is arranged in the groove 6 of the lead plate member 5 formed in a shape along the peripheral edge of the battery 1. To do. The lead plate member 5 has electrical insulation and is thin so that it does not spread laterally. Next, the back side of the lead plate member 5 is bonded to the peripheral edge of the battery 1 by a lead plate member bonding means such as an adhesive tape 7.
This prevents the lead plate 4 from being short-circuited with the positive electrode of the battery 1.

[0009]

As described above, according to the present invention, a flat-shaped lithium ion battery, and a lead plate member having a groove extending from the vicinity of the negative side of the battery to the side edge by bending at the corner of the battery, The lead plate member is housed in the groove and has one end fixed to the minus side by spot welding and the other end fixed to the other electrode. There is no fear of short-circuiting the plates.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a perspective view of the lead plate structure of FIG.

[Explanation of symbols]

1 Lithium ion battery 2 plus poles 3 minus pole 4 lead plate 5 Lead plate member 6 grooves 7 Lead member adhesive tape

Claims (5)

[Claims] 1. A flat prismatic lithium-ion battery, a lead plate member having a groove extending from the vicinity of the negative side of the battery to a side edge by bending at a corner of the battery, and in the groove of the lead plate member. A lead plate structure, characterized in that the lead plate is housed in and has one end fixed to the minus side by spot welding and the other end fixed to the other electrode. 2. A flat prismatic lithium ion battery, a lead plate member having a groove extending from the vicinity of the negative side of the battery to a side edge by bending at a corner of the battery, and in the groove of the lead plate member. A lead plate that is housed in a battery and has one end fixed to the minus side by spot welding and the other end fixed to the other electrode; and a lead plate that is interposed between the lead plate member and the side edge of the battery. A lead plate structure comprising: a lead plate member adhering means for adhering and fixing the periphery of the battery. 3. The lead plate structure according to claim 1, wherein the lead plate member adhering means is a tape. 4. The lead plate structure according to claim 1, wherein the lead plate member adhering means is provided on the battery surface side of the lead plate member. 5. A flat prismatic lithium ion battery, a lead plate member having a groove extending from the vicinity of the negative side of the battery to a side edge by bending at a corner of the battery, and in the groove of the lead plate member. A lead plate having one end fixed to the minus side by spot welding and the other end fixed to the other electrode, and the lead plate member is interposed between the lead plate member and the side edge of the battery. A lead plate structure comprising: a lead plate member adhering means for adhering and fixing to the peripheral edge of the battery; and a lead plate member adhering means for adhering the lead plate to the groove of the lead plate member.