KR20060094231A - Battery pack with switch for preventing short circuit - Google Patents

Abstract

A protective circuit board including a battery case having an opening formed at an outer surface thereof, a battery cell accommodated in the battery case, a power connection terminal accommodated in the battery case and electrically connected to the battery cell, and an exposed portion, a contact portion, and a connection portion. However, the exposed part is exposed to a part of the battery case, the contact part may be electrically connected to the power connection terminal, the connection part is elastic and the power terminal made of a conductive material electrically connecting the exposed part and the contact part, the movable part is movable The battery pack of the mobile communication device having a short circuit prevention switch including a switch interposed between the power connection terminal and the contact portion when the movement in one direction and intercepting the electrical connection between the power terminal and the protection circuit board, a simple switch Operation allows the user to set the battery power supply arbitrarily. Even if the power supply terminal is exposed to the outside of the battery pack, if it is set to the locked state, a short circuit due to contact with the outside can be prevented.

Mobile communication device, battery pack, short circuit protection, switch

Description

Battery pack of mobile communication device with short circuit prevention switch {Battery pack with switch for preventing short circuit}

1 is a perspective view from above and below of a battery pack of a mobile communication device having a short circuit prevention switch according to an exemplary embodiment of the present invention.

2 is an exploded perspective view of a battery pack of a mobile communication device having a short circuit prevention switch according to a preferred embodiment of the present invention.

Figure 3 is a perspective view from above of the lower case portion coupled to the switch and the power terminal in the state that the short-circuit prevention switch according to a preferred embodiment of the present invention is UNLOCKed.

Figure 4 is a perspective view of the lower case portion of the lower case coupled to the switch and the power terminal in the state that the short-circuit prevention switch according to a preferred embodiment of the present invention is UNLOCKed.

5 is a cross-sectional view taken along the line AA ′ of FIG. 4.

Figure 6 is a perspective view of the lower case portion coupled to the switch and the power terminal in the state in which the short-circuit prevention switch according to a preferred embodiment of the present invention is locked.

Figure 7 is a perspective view of the lower case portion coupled to the switch and the power terminal in the state that the short-circuit prevention switch is locked in accordance with a preferred embodiment of the present invention.

FIG. 8 is a cross-sectional view taken along line BB ′ of FIG. 7.

<Description of the symbols for the main parts of the drawings>

100: battery pack 110 with a short circuit prevention switch: the upper case

120: lower case 130: switch opening 140: power terminal opening

200: battery cell

300: protection circuit board 310: power connection terminal

400: power supply terminal 410: exposed portion 420: contact portion 430: connection portion

500: short circuit prevention switch

510: Insertion plate portion 520: Stopping protrusion 530: Handle portion

600: power terminal deformation prevention jaw

The present invention relates to a battery pack, and more particularly to a battery pack of a mobile communication device having a short circuit prevention switch.

Li-ion battery cells, which are mainly used as a power source for mobile communication devices such as mobile phones, have a risk of explosion or fire due to short circuits. The battery pack has two power terminals exposed to the outside, one for the power supply to the mobile phone body, and one for the battery charging.

Often, battery pack explosions are caused by a short circuit between the battery's external terminals and a metal object when the user unconsciously places the phone close to a metal object (such as a cell phone strap or a necklace). Conventional techniques for preventing this include omitting the external terminal of the battery and using only the internal terminal for power supply of a mobile phone and battery charging.

However, even if the external terminal is removed, there is always a risk of short circuit by the internal terminal alone, and as the external terminal disappears, it becomes difficult to simultaneously charge and supply power to a mobile phone with a single battery. .

 Prior arts related to the battery pack of a mobile communication device having a short circuit prevention switch, Korean Utility Model Publication No. 20-0357573 ('Mobile phone battery having a short circuit protection function and a charging cradle corresponding thereto') and No. 20-0359956 ('Mobile Phone Batteries with Short-Circuit Functions and Charging Cradles') and No. 20-0359958 ('Mobile Phone Batteries with Short-Circuit Functions and Charging Cradles').

The present invention relates to a mobile phone battery having a short circuit protection function and a charging cradle corresponding thereto, and according to whether the battery is installed in the charging cradle, opening and closing an electrical connection between the charging terminal and the cradle connecting terminal or between the circuit board and the charging terminal. The switch is installed separately in the battery cover, but since the switches have a structure that is opened and closed by interaction with the charging cradle, a hole is formed in the battery cover and a protrusion corresponding to the hole is formed in the charger accordingly. As a result of the additional structure, the holes are stuck with this material or there are aesthetic problems of portable devices.

In addition, the above devises are for preventing the short circuit of the charging terminal, there is a problem that can not prevent the short circuit of the power terminal of the battery pack for supplying power to the main body of the portable device.

The present invention provides a simple locking and unlocking switch device in a battery pack without a separate terminal protection case for preventing a short circuit of a battery of a mobile communication device. It is to provide a battery pack of a communication device.

In addition, the present invention is a battery pack of the mobile communication device having a short-circuit prevention switch that can be applied for short-circuit prevention of the power supply terminal for supplying power to the main body of the mobile communication device as well as the charging terminal connected to the charger. It is to provide a battery pack.

According to an aspect of the present invention, a protective circuit board including a battery case having an opening formed in the outer surface, a battery cell accommodated in the battery case, a power connection terminal accommodated in the battery case and electrically connected to the battery cell; Including an exposed part, a contact part and a connection part, the exposed part is exposed to a part of the battery case, the contact part may be electrically connected to the power connection terminal, the connection part is made of a conductive material which is elastic and electrically connects the exposed part and the contact part. Mobile communication with a short circuit prevention switch that is movably coupled to the power terminal and the opening, and is disposed between the power connection terminal and the contact part when moved in one direction to block an electrical connection between the power terminal and the protection circuit board. A battery pack of the device is provided.

The power supply terminal is integrally formed, and the connection portion is bent or curved one or more times from one end of the exposed portion to the inside of the battery case to extend so that the contact portion has an elastic force in the direction of the protective circuit board.

The switch may include an insertion portion of a non-conductive material and a handle portion coupled to the insertion portion through the opening and exposed to the outer surface of the battery case.

The power terminal is preferably a power supply terminal connected to the mobile communication device body or a charging terminal connected to the battery charger.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of a battery pack of a mobile communication device having a short circuit prevention switch according to the present invention.

1 is a perspective view from above and below of a battery pack of a mobile communication device having a short circuit prevention switch according to a preferred embodiment of the present invention, and FIG. 2 is a movement having a short circuit prevention switch according to a preferred embodiment of the present invention. An exploded perspective view of a battery pack of a communication device. 1 and 2, a battery pack 100 having a short circuit prevention switch, an upper case 110, a lower case 120, a switch opening 130, a power terminal opening 140, and a battery cell 200. ), The protection circuit board 300, the power terminal 400, the short circuit prevention switch 500 is shown.

The battery pack 100 having a short circuit prevention switch according to the present embodiment is a general mobile phone battery pack, the short circuit prevention switch 500 configured in a sliding manner is installed on the lower case 120 of the battery pack power terminal ( It has a structure that prevents damage to the battery, such as an explosion caused by a short circuit caused by the contact of a metallic object to the externally exposed portion of the 400).

2, the lower case 120 of the battery pack is provided with a switch opening 130 and a power terminal opening 130 at the bottom, the battery cell 200 on the lower case 120 ) Is placed, the power supply terminal 400 is located at a position corresponding to the power supply terminal opening 130 has an exposed surface for supplying power to the mobile phone body.

In addition, the protection circuit board 300 that is electrically connected to the battery cell 200 is placed inside the battery pack 100, because the power supply terminal 400 has a structure having elasticity inside the battery pack 100 The terminal 400 and the protection circuit board 300 are electrically connected to each other when the short circuit prevention switch is open.

On the other hand, the short-circuit prevention switch 500 is slidably coupled between the power supply terminal 400 and the protection circuit board 300, in the locked (LOCK) state, a part of the short-circuit prevention switch 500 made of a non-conductive material is the power supply terminal. It is provided between the 400 and the protective circuit board 300 has a structure to block the electrical connection of both. Next, the upper case 110 of the battery pack is combined to assemble the battery pack 100 having the short circuit prevention switch according to the present embodiment.

3 is a perspective view of a lower case part coupled to a switch and a power terminal in a state in which a short circuit prevention switch according to a preferred embodiment of the present invention is UNLOCKed, and FIG. 4 is a short circuit prevention according to a preferred embodiment of the present invention. FIG. 5 is a perspective view of a lower case portion in which a switch and a power supply terminal are coupled while the switch is in the UNLOCK state, and FIG. 5 is a cross-sectional view of the portion AA ′ of FIG. 4. 3 to 5, the lower case 120, the switch opening 130, the protection circuit board 300, the power connection terminal 310, the power terminal 400, the exposed part 410, and the contact part 420. The connection part 430, the short circuit prevention switch 500, the insertion plate part 510, the stopping protrusion 520, the handle part 530, and the power terminal deformation preventing jaw 600 are illustrated.

As shown in FIG. 3, the exposed portion 410 of the power terminal exposed on the surface of the lower case 120 and the handle portion 530 of the short circuit prevention switch protruding through the male position opening 130 are located at the left side thereof. When the user removes the battery pack from the mobile phone body, the user can easily operate the handle 530 of the short circuit prevention switch to cut off the power supply to the power terminal 410 to prevent a short circuit.

In order to explain the structure of the short circuit prevention switch according to the present embodiment, FIG. 4 illustrates a lower case part in which a short circuit prevention switch and a power terminal are coupled while the short circuit prevention switch is UNLOCKed, and in FIG. 4 is a cross-sectional view taken along the line A-A 'of FIG.

The power supply terminal 400 according to the present embodiment includes an exposed portion 410 exposed to the outer surface of the lower case 120, a connecting portion 430 that is bent from the lower end of the exposed portion to the inner side of the lower case, and an end of the connecting portion. Consists of the contact portion 420 is formed to have a surface spaced apart from the exposed portion extending from. The exposed part 410, the connection part 430, and the contact part 420 are all made of a conductive material.

Meanwhile, in the present embodiment, the exposed part 410, the connecting part 430, and the contact part 420 of the power supply terminal 400 are integrally formed, but each of them is combined by applying a well-known technique to those skilled in the art. It may also be considered that the terminal 400 is configured to have elasticity in the inner direction of the lower case 120.

Short-circuit prevention switch 500 is formed so that the handle portion 530 is protruded from the plate-shaped insertion plate 510 so as to be inserted into the male position opening 130 to slide up and down, the insertion plate portion 510 is the bottom surface Wedge-shaped cross section is placed on the protective circuit board 300, the thickness is reduced toward one end so as to be easily inserted between the power connection terminal 310 of the protective circuit board 300 and the contact portion 420 of the power terminal 400. Has

In addition, to prevent deformation of the power terminal 400 caused by excessively inserted between the short circuit prevention switch 500 between the power connection terminal 310 of the protection circuit board 300 and the contact portion 420 of the power terminal 400. The stop projection 520 is formed at the other end of the insertion plate portion 510 of the short circuit prevention switch 500. Correspondingly, a power terminal deformation prevention jaw 600 is formed inside the lower case 120 where the connection part 430 of the short circuit prevention switch 400 is located, and thus the power terminal 400 due to excessive insertion of the insertion plate part 510. It will prevent the deformation of the.

When the short circuit prevention switch 500 is UNLOCKed, since the power supply terminal 400 and the power connection terminal 310 of the protection circuit board are always in contact with each other, the power supply is possible.

6 is a perspective view of a lower case part coupled to a switch and a power terminal in a state in which a short circuit prevention switch according to a preferred embodiment of the present invention is locked, and FIG. 7 is a short circuit prevention according to a preferred embodiment of the present invention. 8 is a perspective view of a lower case portion in which a switch and a power supply terminal are coupled while the switch is locked, and FIG. 8 is a cross-sectional view of the portion BB ′ of FIG. 7. 6 to 8, the lower case 120, the switch opening 130, the protection circuit board 300, the power connection terminal 310, the power terminal 400, the exposed part 410, and the contact part 420. The connection part 430, the short circuit prevention switch 500, the insertion plate part 510, the stopping protrusion 520, the handle part 530, and the power terminal deformation preventing jaw 600 are illustrated.

 When the user pushes up the handle 130 of the short circuit prevention switch 500 to the upper side as necessary, and becomes the UNLOCK state, the insertion plate 510 of the short circuit prevention switch 500 made of a non-conductive material is connected to the power terminal. Inserted between the contact portion 420 and the power connection terminal 310 of the protection circuit board, the power supply is cut off by separating and separating the two, even if a conductive object such as metal contacts the exposed portion 410 of the power terminal short circuit of the battery pack This is avoided. The lower case 120, the switch opening 130, the protection circuit board 300, the stop protrusion 520, and the description of the power terminal deformation preventing jaw 600 are omitted as described above.

 The battery pack of the mobile communication device having the short circuit prevention switch of the present invention is described and illustrated on the premise that the power supply terminal is a power supply terminal for supplying power to the main body of the mobile communication device in the above-described embodiments and the accompanying drawings. The principle of the present invention can be applied to prevent short circuit of the charging terminal connected to the charger.

In addition, although the battery pack of the mobile communication device having a short circuit prevention switch of the present invention has been described and shown as a battery pack having a short circuit prevention switch employed in a mobile phone in the foregoing embodiments and the accompanying drawings, the principle of the present invention is It can be applied not only to mobile phones but also to mobile communication devices such as PDAs and MP3 players.

As described above, the present invention is capable of various substitutions, modifications, and alterations within the scope of the invention without departing from the spirit of the present invention as shown in the claims to those skilled in the art. It is apparent that the present invention is not limited to the embodiment and the accompanying drawings.

According to the present invention having such a configuration, a user can arbitrarily set the power supply of the battery by a simple switch operation, and even if the power terminal is set to a locked state even if the power terminal is exposed to the outside of the battery pack, a short circuit due to contact with the outside can be prevented. It is possible to provide a battery pack of a mobile communication device having a short circuit prevention switch.

In addition, it is possible to provide a battery pack of a mobile communication device having a short-circuit prevention switch that can be applied for short circuit protection of a power supply terminal for supplying power to a main body of a mobile communication device as well as a charging terminal connected to a charger. .

Claims (4)

A battery case having an opening formed on an outer surface thereof; A battery cell accommodated in the battery case; A protection circuit board accommodated in the battery case and including a power connection terminal electrically connected to the battery cell; And an exposed part, a contact part, and a connection part, wherein the exposed part is exposed to a part of the battery case, and the contact part is electrically connected to the power connection terminal. The connection part is elastic and the exposed part and the contact part are electrically connected. A power terminal made of a conductive material connected to each other; A movement coupled to the opening, the movement having a short circuit prevention switch including a switch interposed between the power connection terminal and the contact portion to move an electrical connection between the power terminal and the protection circuit board when moved in one direction; Battery pack of communication device. The method of claim 1, The power supply terminal is integrally formed, and the connection part is bent or bent one or more times from one end of the exposed part to the inside of the battery case to be extended so that the contact part has an elastic force in the direction of the protective circuit board. Battery pack of mobile communication device equipped with. The method of claim 1, The switch is inserted into the non-conductive material; The battery pack of the mobile communication device having a short circuit prevention switch including a handle portion penetrating through the opening and coupled to the insertion portion and exposed to an outer surface of the battery case. The method according to claim 1 or 2, The power terminal is a battery pack of a mobile communication device having a short-circuit prevention switch which is a power supply terminal connected to the main body of the mobile communication device or a charging terminal connected to the battery charger.

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