KR100591434B1 - Battery pack to prevent external short - Google Patents

Abstract

The present invention relates to a battery pack that can prevent external short, the technical problem to be solved when the conductive short member such as necklace, coin, key, clock, etc. in contact with the charging terminal, the flow of current is blocked, the charger is When connected, it is intended to provide a battery pack with normal current flow.

To this end, the battery pack according to the present invention includes a set terminal to be connected to an external set, and a battery pack provided with a charging terminal to be connected in parallel with the set terminal and connected to a charger. Disclosed is a configuration in which a semiconductor element through which a current passes and interrupts a discharge current due to a short is further connected. For example, the above-described semiconductor element is a PN junction semiconductor element and is provided so as to be reverse to the discharge current caused by the short and to the forward direction to the charge current by the charger.

Charge terminal, short, bare cell, charger, set terminal

Description

Battery pack to prevent external short {Battery pack protecting from external short}

1 is an exploded perspective view illustrating a battery pack capable of preventing an external short according to the present invention.

2A is a cross-sectional view illustrating a peripheral structure of a positive electrode charging terminal of a battery pack capable of preventing external short according to the present invention, and FIG. 2B is a cross-sectional view illustrating a peripheral structure of a negative electrode charging terminal.

3 is a block diagram illustrating a schematic circuit of a battery pack capable of preventing an external short according to the present invention.

4A is a circuit diagram illustrating a state in which a short is prevented when a short member contacts a charging terminal of a battery pack according to the present invention. FIG. 4B is a circuit diagram illustrating a state in which a short circuit is normally charged when a charger is connected to a charging terminal. .

<Description of Symbols for Main Parts of Drawings>

1,3; Opening 2; Upper case

4; Lower case 100; Core pack

110; Bare cells 111,112; lead

120; Protective circuit boards 121 and 122; Wiring

123; Protection circuit 124; Discharge switch

125; Charge switch 126; Sensor resistance

130; Terminal block 131; Positive charging terminal

131a, 131d, 132a, 132d; Challenge pattern

131b, 132c; P-type semiconductors 131c and 132b; N-type semiconductor

132; Negative charging terminal 134; Positive set terminal

135; Negative set terminal 136; Insulator

The present invention relates to a battery pack that can prevent an external short, and more particularly, when a conductive short member such as a necklace, a coin, a key, or a clock is in contact with a charging terminal, the flow of current is interrupted, and when a charger is connected. The present invention relates to a battery pack capable of preventing an external short circuit in which current flows normally.

In general, the battery pack is formed with a charging terminal on one side to be connected to the charger, the set terminal is formed on the other side to be connected to the set.

For example, in the case of a mobile phone, since the set terminal must be electrically connected to the mobile phone body, it is not exposed to the outside. That is, the set terminal is formed on the inner surface that is coupled to the mobile phone body. On the other hand, since the charging terminal must be connected to an external charger, it is exposed to the outside. That is, the charging terminal is formed on the outer surface of the battery pack. Of course, the set terminal and the charging terminal are connected in parallel in the battery pack.

In addition, the recent portable electronic devices, for example, the above-mentioned mobile phone or personal portable terminal has been miniaturized so that it can be easily put in the pocket or bag. Therefore, the probability that the conductor is shorted to the externally exposed charging terminal in a pocket or bag is very large. Of course, since the set terminal is connected to the set and is not exposed to the outside, there is almost no short probability, but the above-mentioned charging terminal has a high probability of being shorted to conductive short members such as necklaces, coins, keys, watches, and the like.

As such, when the charging terminal is shorted, the battery pack generates heat, and thus, the battery pack may explode or ignite, resulting in a very dangerous state for the user. Of course, the capacity available due to the discharge of the battery pack also rapidly decreases. Of course, in order to prevent such a short phenomenon, the battery pack is usually printed with a letter or the like to notice the danger caused by the short, there is a possibility that a short occurs at any time due to the carelessness of the user.

In addition, in order to prevent the short-circuit phenomenon described above, a configuration in which the charging terminal is exposed only when it is mounted on the charger by adding a mechanical configuration around the charging terminal and the charging terminal is covered when it is detached from the charger is also proposed. However, such a configuration has a disadvantage in that, since a new component must be added to the surface of the battery pack, manufacturing cost is high and it is easily broken by external impact during use.

 The present invention is to overcome the above-mentioned conventional problems, the object of the present invention is that when the conductive short member such as necklace, coin, key, clock, etc. in contact with the charging terminal, the flow of current is blocked, when the charger is connected An object of the present invention is to provide a battery pack capable of preventing an external short circuit in which current flows normally.

In order to achieve the above object, the present invention provides a battery pack having a set terminal to be connected to an external set, and a charging terminal to be connected to the set terminal in parallel to the charger, Disclosed is a configuration in which a semiconductor element for passing a charging current and blocking a discharge current due to a short circuit is further connected.

Here, the charging terminal is composed of a positive charging terminal and a negative charging terminal, the positive charging terminal is a P-type semiconductor is formed from the surface, the N-type semiconductor is bonded to the P-type semiconductor, the negative charging terminal is a N-type semiconductor from the surface The P-type semiconductor can be bonded to the N-type semiconductor.

As described above, in the battery pack capable of preventing the external short according to the present invention, when the external short member is connected to the positive and negative charging terminals, the discharge current of the bare cell is reversed with respect to the positive and negative charging terminals. The current cuts off the short.

In addition, in the battery pack according to the present invention, when the positive terminal and the negative terminal of the charger are connected to the positive charging terminal and the negative charging terminal, respectively, the charging current of the charger is forward with respect to the positive charging terminal and the negative charging terminal, and the Is approved.

Therefore, the battery pack according to the present invention blocks the short or discharge current by the external short member, while applying the charging current by the charger, thereby greatly improving the safety and reliability of the battery pack.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings such that those skilled in the art may easily implement the present invention.

1 is an exploded perspective view illustrating a battery pack capable of preventing an external short according to the present invention. Here, the battery pack shown in the drawings is only an example for understanding the present invention, the present invention is not limited to these drawings.

As shown, the battery pack includes an upper case 2 having an opening 1 of a predetermined size, a lower case 4 having an opening 3 of a predetermined size, and between the upper case 2 and the lower case 4. It is located in the core pack 100 which is charged or discharged with a certain energy.

The core pack 100 may include a bare cell 110, a protective circuit board 120 electrically connected to the bare cell 110 to control charging and discharging, and wires to the protective circuit board 120. It consists of a terminal block 130 connected by 121,122.

In addition, the terminal block 130 is provided with charging terminals 131 and 132 connected to the charger, and set terminals 134 and 135 connected to the set. Of course, the charging terminals 131 and 132 and the set terminals 134 and 135 are integrally formed, and since only functions thereof are different, the charging terminals 131 and 132 and the set terminals 134 and 135 will be described separately. In addition, the charging terminals 131 and 132 may include a positive charging terminal 131 and a negative charging terminal 132, and the set terminals 134 and 135 may also include a positive set terminal 134 and a negative set terminal 135. In addition, the charging terminals 131 and 132 and the set terminals 134 and 135 are formed on one insulator 136 surface.

Furthermore, the charging terminals 131 and 131 are exposed to the outside through the opening 1 of the upper case 2, and the set terminals 134 and 135 are exposed to the outside through the opening 3 of the lower case 4. However, the set terminals 134 and 135 exposed through the opening 3 of the lower case 4 are generally connected to a set (not shown), so that they are not exposed to the outside. That is, when the battery pack is connected to the set, the set terminals 134 and 135 are not exposed to the outside, but only the charging terminals 131 and 132 are exposed to the outside.

2A is a cross-sectional view illustrating a peripheral structure of a positive electrode charging terminal of a battery pack capable of preventing external short according to the present invention, and FIG. 2B is a cross-sectional view illustrating a peripheral structure of a negative electrode charging terminal.

As described above, the positive electrode charging terminal 131 is formed on the surface of the insulator 136. Of course, the anode set terminal 134 is also formed on the surface of the insulator 136 when connected to the cathode charging terminal 131. That is, the cathode charging terminal 131 and the anode set terminal 134 are formed in a substantially “??” shape, and a protective circuit board (1) is formed on one side of the cathode charging terminal 131 or the anode set terminal 134. The wiring 122 connected to 120 is connected.

The cathode charging terminal 131 may be formed of a conductive pattern 131a, a P-type semiconductor 131b, an N-type semiconductor 131c, and a conductive pattern 131d from a surface thereof. Such a configuration can easily be a diode. Here, the conductive patterns 131a and 131d may be formed of any one selected from aluminum (Al), copper (Cu), nickel (Ni), tungsten (W), alloys thereof, or equivalents thereof. It is not limited. In addition, the lower conductive pattern 131d is electrically connected to the wiring 122. Of course, the upper conductive pattern 131a is connected to and disconnected from the anode of the external charger. Moreover, the upper conductive pattern 131a is a region where the battery pack is mounted on the outer set and is always exposed when used.

In the drawing, reference numeral 111 is a lead connecting the protective circuit board 120 and the cathode of the bare cell 110, and 112 is a lead connecting the protective circuit board 120 and the positive electrode of the bare cell 110.

Meanwhile, the negative charging terminal 132 is also formed on the surface of the insulator 136. Of course, the negative electrode set terminal 135 is also formed on the surface of the insulator 136 to be connected to the negative electrode charging terminal 132. That is, the negative charge terminal 132 and the negative electrode set terminal 135 is formed in a substantially "??" shape, the protective circuit board 120 on one side of the negative charge terminal 132 or the negative electrode set terminal 135. Is connected to the wiring 121.

The cathode charging terminal 132 may be formed of a conductive pattern 132a, an N-type semiconductor 132b, a P-type semiconductor 132c, and a conductive pattern 132d from a surface thereof. Such a configuration can easily be a diode. The conductive patterns 132a and 132d may be formed of any one selected from aluminum, copper, nickel, tungsten, an alloy thereof, or an equivalent thereof, but are not limited thereto. In addition, the lower conductive pattern 132d is electrically connected to the wiring 121. Of course, the upper conductive pattern 132a is connected to and disconnected from the negative electrode of the external charger. Moreover, the upper conductive pattern 132a is an area where the battery pack is mounted on the outer set and is always exposed when in use.

3 is a block diagram illustrating a schematic circuit of a battery pack capable of preventing an external short according to the present invention. The conductive pattern is not shown here for convenience of description. In addition, the components in the blocks indicated by the dotted lines are electronic components implemented in the protective circuit board. Of course, the present invention is not limited to the components disclosed in the protection circuit board, and various types of protection circuit boards are possible.

First, a protection circuit 123 is connected to a bare cell 110 having a positive electrode and a negative electrode in parallel. Therefore, since the protection circuit 123 is connected to the bare cell 110 in parallel, the protection circuit 123 may sense the charge / discharge voltage of the bare cell 110. In addition, a cathode charging terminal 131 and a cathode set terminal 134 are connected to the anode of the bare cell 110. Of course, as described above, the positive electrode charging terminal 131 and the positive electrode set terminal 134 are in parallel with each other. In addition, a discharge switch 124 and a charge switch 125 are connected between the positive electrode charging terminal 131 and the bare cell 110.

Meanwhile, a negative charging terminal 132 and a negative electrode set terminal 135 are connected to the negative electrode of the bare cell 110. Of course, as described above, the negative charge terminal 132 and the negative electrode set terminal 135 are in parallel with each other. In addition, a sensor resistor 126 is further connected between the negative charging terminal 132 and the bare cell 110 to detect the charge / discharge current by the protection circuit 123.

For reference, the protection circuit 123 turns off the charge switch 125 when the bare cell 110 is in an overcharge voltage or an overcharge current state, and the bare cell 110 is in an overdischarge voltage or overdischarge current state. The discharge switch 124 is turned off.

4A is a circuit diagram illustrating a state in which a short is prevented when a short member contacts a charging terminal of a battery pack according to the present invention. FIG. 4B is a circuit diagram illustrating a state in which a short circuit is normally charged when a charger is connected to a charging terminal. . Here, it should be noted that the positive set terminal and the negative set terminal are not exposed to the outside when coupled to the outer set as described above, and therefore do not contact the conductive short member.

First, referring to FIG. 4A, a conductive short member 201 such as a necklace, a coin, a key, and a clock as described above is in contact with the positive electrode charging terminal 131 and the negative electrode charging terminal 132.

Accordingly, the discharge current of the bare cell 110 tries to pass through the positive charge terminal 131 through the discharge switch 124 and the charge switch 125. However, since the N-type semiconductor 131c and the P-type semiconductor 131b are formed in a reverse direction with respect to the discharge current of the bare cell 110, the positive electrode charging terminal 131 has a discharge current of the bare cell 110. Cannot pass through the positive charge terminal 131.

In addition, the discharge current of the bare cell 110 tries to pass through the negative charging terminal 132. However, since the N-type semiconductor 132b and the P-type semiconductor 132c are installed in the reverse direction with respect to the discharge current, the cathode charging terminal 132 also has a discharge current of the bare cell 110. Cannot pass).

Therefore, even if the conductive short member 201 such as a necklace, a coin, a key, a clock, or the like comes into contact with the cathode charging terminal 131 and the cathode charging terminal 132 as a whole, a substantial short phenomenon does not occur.

Meanwhile, referring to FIG. 4B, the charger 202 as described above is connected to the positive electrode charging terminal 131 and the negative electrode charging terminal 132.

Therefore, the charging current of the charger 202 tries to pass through the positive charging terminal 131. In this case, since the P-type semiconductor 131b and the N-type semiconductor 131c are formed in the forward direction with respect to the charging current, the charging current of the charger 202 is the positive charging terminal 131. ) Can be passed.

In addition, the charging current of the charger 202 tries to pass through the negative charging terminal 132. In this case, since the P-type semiconductor 132c and the N-type semiconductor 132b are also formed in the forward direction with respect to the charging current, the cathode charging terminal 132 may pass through the cathode charging terminal 132. do.

Therefore, when the charger 202 is connected to the positive electrode charging terminal 131 and the negative electrode charging terminal 132 as a whole, substantial charging is performed on the bare cell 110. Furthermore, when the bare cell 110 is connected to the charger 202 in the reverse direction, that is, the positive charging terminal 131 is connected to the negative electrode of the charger 202, the negative charging terminal 132 is connected to the charger 202. Even when connected to the positive electrode of the negative electrode, reverse charging does not proceed due to the PN semiconductor junction structures of the positive electrode charging terminal 131 and the negative electrode charging terminal 132.

As described above, in the battery pack capable of preventing external shorting according to the present invention, when an external short member is connected to the positive and negative charging terminals, the discharge current of the bare cell is determined with respect to the positive and negative charging terminals. Reverse current causes a short circuit.

In addition, in the battery pack according to the present invention, when the positive and negative terminals of the charger are connected to the positive and negative charging terminals, respectively, the charging current of the charger is applied to the bare cell in a forward direction with respect to the positive and negative charging terminals. .

Therefore, the battery pack according to the present invention blocks the short or discharge current by the external short member, while applying the charging current by the charger, thereby greatly improving the safety and reliability of the battery pack.

Moreover, even if the battery pack according to the present invention is connected to the charger in the reverse direction, the flow of reverse current is cut off to further improve the safety and reliability of the battery pack.

What has been described above is only one embodiment for implementing a battery pack capable of preventing an external short according to the present invention, the present invention is not limited to the above-described embodiment, as claimed in the following claims As described above, any person having ordinary knowledge in the field of the present invention without departing from the gist of the present invention will have the technical spirit of the present invention to the extent that various modifications can be made.

Claims (9)

A battery pack having a set terminal to be connected to an external set, and having a charging terminal to be connected in parallel to the set terminal and connected to a charger, The charging terminal includes a positive charging terminal and a negative charging terminal, the positive charging terminal is formed of a P-type semiconductor from the surface, the N-type semiconductor is bonded to the P-type semiconductor, the negative charging terminal is N-type from the surface A semiconductor pack is formed, and a P-type semiconductor is bonded to the N-type semiconductor, and a charging current passes, and a discharge current caused by a short cuts off the battery short, which can be prevented. delete The battery as claimed in claim 1, wherein the set terminal is connected to an external set and is not exposed to the outside, and the charging terminal is exposed to the outside so as to be connected to and disconnected from the charger. pack. delete The positive electrode conductive pattern of claim 1, wherein an anode conductive pattern for electrical connection with the anode terminal of the charger is formed on the P-type semiconductor surface of the cathode charging terminal. A battery pack capable of preventing an external short, characterized in that a negative electrode conductive pattern for electrical connection with the negative terminal of the charger is formed on the N-type semiconductor surface of the negative electrode charging terminal. The battery pack as claimed in claim 5, wherein the positive electrode conductive pattern and the negative electrode conductive pattern are formed of any one selected from aluminum, copper, nickel, tungsten or alloys thereof. The battery pack as claimed in claim 1, wherein the positive and negative charging terminals are connected to the positive and negative electrodes of the bare cell via a protection circuit, respectively. The method of claim 7, wherein when the external short member is connected to the positive and negative charging terminal, the discharge current of the bare cell is reverse to the positive and negative charging terminals, the short is cut off. Battery pack to prevent external short. 8. The method of claim 7, wherein when the positive terminal and the negative terminal of the charger are connected to the positive and negative charging terminals, respectively, the charging current of the charger is forward with respect to the positive and negative charging terminals, and thus is applied to the bare cell. A battery pack capable of preventing external shorting, characterized in that applied.

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