KR101050332B1 - Mobile phone battery mounting device and mobile phone using method - Google Patents

Abstract

The present invention relates to a mobile phone battery mounting apparatus that can be equipped with two or more batteries at the same time and a mobile phone using method using the same. The present invention provides a mobile phone body, a first battery with a built-in thermistor, and a second battery stacked on the first battery and the first battery to simultaneously supply power to the mobile phone body by simultaneously mounting the same second battery as the first battery. It provides a mobile phone battery mounting device comprising a battery connector for connecting the parallel and a rear cover coupled to the mobile phone body to accommodate the second battery and the battery connector.
According to the present invention, by providing two or more removable batteries in one terminal at the same time by providing a battery connector, it is possible to use the terminal for a long time without replacing the battery, it is possible to use safely through the provision of an energy equalizer and the temperature monitoring of the battery.

Description

A Battery Inserting Apparatus For Mobile Phone And Using Method Of Mobile Phone Using The Same}

The present invention relates to a mobile phone, and more particularly, to a mobile phone battery mounting apparatus that can be equipped with two or more batteries at the same time and a mobile phone using method using the same.

Recently, with the rapid development of mobile phones and Internet communication, multimedia smartphones capable of various games, as well as Internet browsing, music or video playback, in addition to call functions have emerged, and the market share is gradually increasing.

In addition to phone calls, when watching movies or browsing the Internet, which requires relatively high power consumption, simultaneous use of smartphones is only a few hours.

In this case, the user may have to charge from time to time through a separate charger or the like, or may experience inconvenience in using multiple removable batteries at the same time.

Until now, an alternative to solve this problem is to prepare an external power supply (eg, a battery) and carry it separately. Existing external power is sold on the outside of the phone and is not connected directly to the phone's battery, but rather connected to a charging connector (usually a USB connector) to extend the use time by charging the battery inside. This method boosts the 3.7 V external battery to 5 V, sends it to the charging connector (USB connector), and performs a two-step voltage conversion process to charge the 3.7 V battery inside the mobile phone. There is a problem.

In addition, the existing external power supply provides a large-capacity battery manufactured by a non-mobile phone manufacturer, which is relatively high in price, and therefore, the marketability is not good, and the risk of explosion and fire of the provided battery also follows.

The present invention has been made to solve the above-mentioned problems, and aims to increase the use time of the mobile phone in an energy efficient and economical manner by simultaneously mounting two or more removable batteries in one mobile phone.

In addition, since a commercially available smart phone includes two batteries, it is not necessary to purchase additional batteries, and only a structure for mounting a plurality of batteries and a circuit for safety are provided so that the user can use the mobile phone economically. It is intended to be extensible.

In order to solve the above problems, the present invention provides a mobile phone battery mounting apparatus that can be supplied to the mobile phone main body by simultaneously mounting the mobile phone main body, the first battery with a built-in thermistor and the same second battery as the first battery; The mobile phone battery mounting apparatus includes a battery connector for connecting the first battery and a second battery stacked on the first battery in parallel, and a rear cover coupled with the mobile phone main body to receive the second battery and the battery connector. And a lower connector electrically connected to a first battery and an upper connector electrically connected to the second battery, respectively, at the lower and upper ends of the battery connector, wherein the mobile phone body is connected to the lower connector of the battery connector. And electrically connected to the first battery. It provides batteries for cell phones attached to the device.

In addition, the present invention is a mobile phone battery mounting apparatus for supplying power to the mobile phone body by simultaneously mounting a mobile phone body, a first battery with a built-in thermistor and the same second battery and a third battery as the first battery, The mobile phone battery mounting apparatus includes a first battery connector configured to parallelly connect the first battery and a second battery stacked on the first battery, and a second battery connected to the third battery stacked on the second battery and the second battery in parallel. And a rear cover coupled to the mobile phone main body to receive a battery connector, and the second battery, the third battery, the first battery connector, and the second battery connector, wherein the first battery connector protrudes downwards, A first terminal for electrically contacting the cellular phone body and the first battery and laterally spaced apart from the first terminal For example, a second terminal electrically contacted with the second battery, wherein the second battery connector protrudes downward to be electrically connected to the second battery and the third battery, and the third terminal. And a fourth terminal electrically spaced in contact with the third battery and laterally spaced from the terminal, such that the mobile phone main body can receive power from the first to third batteries. To provide.

In addition, the present invention accommodates a mobile phone body, two batteries for supplying power to the mobile phone body, a battery connector electrically connected to the mobile phone body by connecting the two batteries in parallel, and accommodates the two batteries and the battery connector A method of using a mobile phone for simultaneously mounting a plurality of batteries in a mobile phone including a rear cover coupled to the mobile phone body, the first step of assembling and mounting the mobile phone body, the battery connector, the two batteries, and the rear cover ; Measuring a voltage difference between the two batteries and exceeding a set value, wherein the electrical connection between the mobile phone and the two batteries is cut off; And a third step of recovering electrical connection between the mobile phone and the two batteries when the voltage difference reaches a predetermined value or less.

As described above, according to the present invention, a battery connector and a battery cover may be provided to simultaneously mount two or more removable batteries in one terminal, thereby allowing the user to use the terminal for a long time without replacing the battery. In general, when N batteries are installed, when the current consumed by one battery is reduced by 1 / N and the chemical reaction inside the battery is slowed down, the self-heating is also reduced to N times or more (typically N * 1.2 times or more) times. Can be used to maximize energy efficiency. Reducing fever not only increases battery life, but also extends the life of batteries and cell phones.

In addition, the present invention is a method of directly expanding the battery capacity by connecting a plurality of batteries in parallel, compared to the conventional external power supply method for supplying power through a charging connector (generally a USB connector) more than 30% energy transfer efficiency Can be increased.

According to the present invention, by providing a battery connector including a mechanism for fixing a battery and a protection circuit at the same time, it is possible to extend the battery use time at a low price, thereby providing excellent economy and business feasibility.

1 is an exploded perspective view of a mobile phone equipped with two batteries using a battery mounting apparatus according to an embodiment of the present invention;
2A to 2C are perspective, front and side views of the battery connector shown in FIG. 1, respectively;
3 shows two batteries and a battery connector shown in FIG.
4 is an exploded perspective view of a mobile phone equipped with three batteries using a battery mounting apparatus according to another embodiment of the present invention;
5 is a schematic cross-sectional view of the three batteries and the battery connector shown in FIG. 4;
6 is a schematic electrode configuration of a mobile phone body, a plurality of batteries and a charging terminal according to the present invention;
7 is a schematic configuration diagram of a temperature protection circuit and an energy equalizer according to an embodiment of the present invention;
8 is a schematic diagram of an energy equalizer according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view showing a mobile phone equipped with two batteries at the same time using a mobile phone battery mounting apparatus according to the present invention, Figures 2a to 2c is a battery connector according to the invention, Figure 3 is a battery connector and two It is a perspective view which shows the electrode position of a battery.

1 to 3, a mobile phone battery mounting apparatus according to a preferred embodiment of the present invention includes a mobile phone main body 100, a first battery 110 incorporating a thermistor, and a second battery 120 identical to the first battery. At the same time, it is characterized in that to be able to supply power to the mobile phone body (100). The mobile phone battery mounting apparatus according to the present exemplary embodiment includes a battery connector 200 for connecting a first battery 110 and a second battery 120 stacked on the first battery 110 in parallel, and the second battery 120. And a rear cover 300 coupled with the mobile phone body to accommodate the battery connector 200.

Specifically, the mobile phone main body 100 is generally commercially available, and the two batteries 110 and 120 are preferably the same in shape, size, and charge amount.

The battery connector 200 is for electrically connecting the mobile phone main body 100 and the two batteries 110 and 120. A lower connector 212 and an upper connector 222 are respectively disposed at the lower and upper ends of the battery connector 200. ) Is formed.

The lower connector 212 is for electrically connecting the mobile phone body 100 and the first battery 110. In addition, the lower connector 212 is inserted between the mobile phone main body 100 and the first battery 110 so that the battery connector 200 is fixed when the first battery 110 is mounted on the mobile phone main body 100. Can be. In addition, the upper connector 222 is for electrical contact with the second battery 220 stacked on the first battery 110. In order to prevent an electrical short circuit when the two batteries 110 and 120 are mounted and used, the upper connector 212 and the lower connector 222 are preferably spaced apart from each other and formed on the opposite side in the lateral direction.

In order to smoothly mount the battery connector 200 between the mobile phone body 100 and the first battery 110, the thickness of the lower connector 212 is preferably 0.5 mm or less. When the thickness of the lower connector 212 exceeds 0.5mm, it is because the first battery 110 is difficult to be inserted smoothly into the battery receiving space 102 of the mobile phone main body 100.

Specifically, the first battery 110 and the second battery 120 each include a first exposure electrode 112 and a second exposure electrode 212 formed at the same position, respectively, the upper connector 212 and the lower The connector 222 is formed in contact with the first exposure electrode 112 and the second exposure electrode 122, respectively. The first battery 110 and the second battery 220 are disposed such that the first exposure electrode 112 and the second exposure electrode 122 are laterally spaced apart from each other when stacked.

Therefore, the battery connector 200 and the first battery 100 are sequentially coupled to the mobile phone main body 100, and the exposure electrodes 112 and 122 of the second battery 120 are crossed on the first battery 110. When the upper surface of the first battery 110 and the bottom surface of the second battery 120 are stacked in contact with each other, the mobile phone main body 100 is connected to the first battery 110 and the second battery 120 through the battery connector 200. Power can be supplied by paralleled power supplies.

Therefore, according to the present invention, since more than twice the power can be supplied compared to the case of using only one battery, it is possible to secure more than twice the use time without replacing or additional charging of the battery.

As described above, when the mobile phone body 100, the battery connector 200, the first battery 110, and the second battery 120 are sequentially installed, the rear cover 300 may be coupled with the mobile phone body 100. Can be used.

The rear cover 300 according to the present invention is formed with a receiving space 302 that can accommodate the battery connector 200 and the second battery 120 protruding upward from the mobile phone body 100.

In addition, a charging electrode 304 is formed on the rear cover 300, and the charging electrode 304 is electrically connected to the upper connector 222 when the rear cover 300 is coupled. Therefore, according to the present invention, when the rear cover 300 is mounted, it is possible to directly charge through a separate charger (not shown) without separating the batteries 110 and 120 through the charging electrode 304. According to a preferred embodiment of the present invention, the charger is preferably a charger in the form of a holder that can lean against the mobile phone.

In general, a battery used in a mobile phone is a rechargeable secondary battery, and the battery includes a thermistor so that the temperature of the battery can be monitored by the charging device of the mobile phone. Since this protection circuit is designed to operate when one battery is used alone, separate measures should be taken to protect both batteries when charging two or more batteries at the same time.

In order to solve this problem, the present invention provides a separate overheat protection temperature protection circuit. The temperature protection circuit is preferably integrated into the battery connector.

6 and 7, according to the present invention, the first battery 110 is connected to the mobile phone body in a general manner, and the mobile phone body measures and protects the temperature of the first battery 110. The temperature of the added batteries (second to fourth batteries) is monitored in advance by monitoring the resistance value of the thermistor built in the first battery in a circuit embedded in a battery connector connected to the added batteries (second to fourth batteries). It is a circuit configured to stop charging by informing the mobile phone when it is measured above the set temperature. At this time, the preset temperature is preferably 40 ℃. In addition, the method of notifying the mobile phone body that the dangerous temperature may use a parallel connection of the resistor R1 between the temperature sensor electrode of the mobile phone and the negative power supply electrode. In this case, the resistance value to be connected in parallel is, for example, a battery having a temperature sensor electrode connected in parallel with a resistance of 3kΩ or less in the case of a battery using a 10kΩ NTC thermistor or 22kΩ or less in the case of a battery using a 100kΩ NTC thermistor. To stop charging.

The temperature protection circuit according to the present invention may be configured in an analog manner consisting of a comparison circuit and a transistor or in a digital manner including an A / D converter and a microcontroller.

In addition, the temperature protection circuit uses a PTC thermistor or a polymer positive temperature coefficient device (PPTC) between the batteries 110 and 120 to maintain the same voltage between the first battery 110 and the second battery 120. It may also include.

That is, when the voltages of the first battery 100 and the second battery 120 are different, current flows between both batteries. Providing a PTC thermistor or PPTC between both batteries ensures that an appropriate amount of current flows safely in the circuit as the temperature of the device changes with the amount of current flowing through the device. Thus, the voltage between both batteries 100 and 200 can be kept the same.

According to the present invention, when a plurality of batteries are installed in parallel, a high current flows between the batteries when the voltages between the batteries are different, which may cause a fire or failure. Therefore, when the voltage difference exceeds a reference value by measuring the voltage difference between the batteries, the parallel connection is performed. It provides an energy equalizer that shuts off and slowly flows current through the resistor to make a parallel connection when the voltage difference between multiple batteries drops below the reference value.

The energy equalizer according to the present invention may be built in the battery connector 200 or the rear cover 300 as needed to directly mount a battery having a different voltage to the mobile phone main body, or separately provided to an external device to provide voltages of a plurality of batteries. It can also be mounted on the phone body after keeping the same.

First, the case where the energy equalizer is included in the battery connector 200 will be described. 7 and 8, the first battery 110 is basically always electrically connected to a mobile phone to supply power. The energy equalizer connects the resistor R between the first battery 110 and the second battery 120 so that the batteries are connected in parallel only when the voltage difference between the resistors R is less than or equal to a preset value. Power supply). When two batteries of different voltages are connected through a resistor, current flows, and after a predetermined time, the voltage difference between both batteries approaches 0V. For safe use of the mobile phone, it is preferable that power is supplied to the mobile phone main body 100 only when the voltage difference between the first battery 110 and the second battery 120 is 20 mV or less.

The present invention provides a fuse (F) between the battery and the mobile phone main body to further ensure safety even when the voltage difference between the battery is less than the reference value. The fuse is not limited, but it is preferable to use a polyfuse capable of repeated permanent use rather than a disposable fuse.

In particular, the fuse may be a PTC thermistor or a polymeric positive temperature coefficient device (PPTC). PPTC is also called a resettable fuse, and when the PPTC is installed, the fuse does not short-circuit even when overcurrent flows. Therefore, it can be used without replacing the fuse. In the case of PPTC, when an overcurrent flows in a circuit, the PPTC is changed from a low resistor to a high resistor by Joule heat generated by the current.

Specifically, when the battery connector 200, the first battery 110, the second battery 120, and the rear cover 300 are mounted on the mobile phone main body 100, the voltage between the two batteries 110 and 120. Measure and compare the differences. As a result of the measurement, when the voltage difference between the two batteries 110 and 120 exceeds the reference value, the mobile phone main body 100 is powered by the first battery 110. That is, when the voltage difference between the two batteries 110 and 120 exceeds the reference value, the electrical connection of the second battery 120 is released for safety. In this case, when a safe amount of current flows through the resistor R installed between the two batteries 110 and 120, and a predetermined time passes, the voltage difference between the two batteries 110 and 120 reaches a reference value or less. It is desirable for the electrical connection between the 100 and the second battery 120 to be restored. In this case, the resistance R installed between the two batteries 110 and 120 is preferably 1 kV to 10 kK.

In addition, by providing a separate display means on the rear cover 300, it is preferable to be able to visually check the voltage difference between the two batteries. LCD, LED, etc. can be used as a display means.

According to the present invention, the operation of the energy equalizer may be composed of an analog comparator and a transistor, or may be performed in a digital manner including an A / D converter, a microcontroller and a transistor.

Next, the case where the energy equalizer is provided separately from the mobile phone will be described. In this case, a resistor is connected between the two batteries so that current flows between the batteries to reduce the voltage difference, and when the voltage difference is less than a predetermined voltage, the LED or the LCD indicates that the parallel mounting is possible. At this time, the resistance mounted between the battery is preferably between 1 kV to 10 kK, and the voltage difference that can be mounted in parallel is preferably 20 mV or less.

In addition, it is desirable that the energy equalizer separately provided to the outside has a separate charging circuit to have a function of charging a battery when an external power source is connected.

According to another aspect of the present invention, the present invention provides a mobile phone battery device that can be used by mounting three or more batteries at the same time. For convenience of explanation, the use of three batteries mounted at the same time will be described, but the present invention is not limited thereto.

4 and 5, the mobile phone battery mounting apparatus according to the present embodiment includes a mobile phone main body 100, a first battery 110 incorporating a thermistor, and a second battery 120 identical to the first battery 110. ) And the third battery 130 are mounted at the same time to supply power to the mobile phone body 100. The mobile phone battery mounting apparatus includes a first battery connector 400, a second battery 120, and a second battery 120 connected in parallel to the first battery 110 and the second battery 120 stacked on the first battery 110. A second battery connector 500 connecting the third batteries 130 stacked on the second battery 120 in parallel, and the second battery 120, the third battery 130, and the first battery connector 400. And a rear cover 500 coupled to the mobile phone body 100 to accommodate the second battery connector 500.

The first battery connector 400 protrudes downward to be in a lateral direction with the first terminal 412 and the first terminal 412 electrically contacting the mobile phone body 100 and the first battery 110. The second terminal 422 is spaced apart from and electrically connected to the second battery 120.

In addition, the second battery connector 500 protrudes downward to form a third terminal 512 and the third terminal 512 to electrically contact the second battery 120 and the third battery 130. And a fourth terminal 522 that is laterally spaced apart from and electrically connected to the third battery 130.

According to the present invention, in order to prevent electrical short between each battery even when the same three batteries are stacked, the exposed electrode of each battery is characterized in that arranged as far as possible. That is, when sequentially stacking three batteries 110, 120, and 130, the positions of the exposed electrodes 112, 122, and 132 formed in each battery may be alternately arranged left and right, so that the first battery connector 400 and the second battery may be alternately disposed. The positions of the first to fourth terminals 412, 422, 512, and 522 formed in the battery connector 500 are adjusted.

In the case where three or more batteries are stacked and used, there is a problem that it is difficult to fix three or more batteries, unlike the above-described embodiment using two batteries.

Accordingly, the present invention provides a circumferential wall and fixing means for accommodating the batteries 120 and 130 in the first battery connector 400 and the second battery connector 500, respectively.

That is, the first battery connector 400 and the second battery connector 500 according to the present embodiment have one surface 402 for electrical connection between the mobile phone main body 100 and the three batteries 110, 120, and 130. A temperature protection circuit and various connection terminals are formed at 502 to include a peripheral wall for accommodating one battery.

For smooth positioning of the two batteries 120 and 130 protruding upward from the mobile phone main body 100, the height of the circumferential wall of the battery connectors 400 and 500 is equal to or higher than the height of the batteries 120 and 130. It is desirable to be slightly smaller than the height of 120 and 130. However, for stable electrical connection, it is preferable that the height of one surface 402, 502 on which various connection terminals and temperature protection circuits are formed is the same as the height of the battery 120, 130. In addition, it is preferable that the thickness of the circumferential wall is formed to be about 1 to 2 mm so that the accommodation space of the rear cover 300 is not too large.

In addition, in order to fix the two battery connectors 400 and 500, a plurality of grooves 404 and protrusions 504 correspond to an upper surface of the first battery connector 400 and a lower surface of the second battery connector 500, respectively. Formed in position. Therefore, when the second battery connector 500 is stacked on the first battery connector 400, the groove 404 and the protrusion 504 may be coupled to fix the two battery connectors 400 and 500. The first battery connector 400 is inserted and fixed between the mobile phone body 100 and the first battery 110 as in the above-described embodiment.

As in the above-described embodiment, an exposed electrode 304 is formed on the rear cover 300 of the mobile phone battery mounting apparatus according to the present embodiment, so that the battery 110, 120, 130 can be directly charged by an external charger.

In addition, the two battery connectors 400 and 500 may each include the same temperature protection circuit and energy equalizer as in the above-described embodiment, and in this case, the battery may be prevented from overheating during charging and the battery voltage may be maintained the same. have. Detailed description thereof will be omitted.

According to the present invention, two or more batteries can be simultaneously installed and used in a mobile phone to secure sufficient usage time. Furthermore, the user can install two or more batteries through a thermal protection circuit and an energy equalizer to prevent overheating during charging and use, respectively. Even if you can safely use the phone.

100 cell phone body
110, 120, 130 first to third batteries
200, 400, 500 battery connectors
212, 222 connectors
300 rear cover

Claims (19)

A mobile phone battery mounting apparatus for supplying power to the mobile phone main body by simultaneously installing a mobile phone main body, a first battery having a built-in thermistor, and a second battery identical to the first battery.
The mobile phone battery mounting apparatus is coupled to the mobile phone main body to accommodate the first battery and a second battery stacked on the first battery in parallel, and the second battery and the battery connector, the mobile phone body and A rear cover having a charging circuit connected to charge the first and second batteries,
Lower and upper ends of the battery connector are respectively formed with a lower connector electrically connected with a first battery and an upper connector electrically connected with the second battery, and the mobile phone body is connected to the first connector through a lower connector of the battery connector. Electrically connected to the battery,
The upper connector and the lower connector are spaced apart from each other, so that a short between both batteries is prevented when the first battery and the second battery are stacked.
The first battery and the second battery each include a first exposure electrode and a second exposure electrode formed at the same position, and the upper connector and the lower connector are respectively in contact with the first exposure electrode and the second exposure electrode. The first battery and the second battery are formed such that the first exposure electrode and the second exposure electrode are laterally spaced apart from each other when stacked.
The lower connector is inserted between the mobile phone main body and the first battery, to fix the battery connector when the first battery is mounted on the mobile phone main body,
A charging electrode is formed on the rear cover, one end of the charging electrode is electrically connected to the upper connector, and the other end is exposed to the outside of the rear cover.
The battery connector is provided with a temperature protection circuit electrically connected to the charging electrode is a mobile phone battery mounting apparatus, characterized in that to prevent overheating of the two batteries when charging. delete delete delete The method of claim 1,
Mobile phone battery mounting device, characterized in that the thickness of the lower connector is 0.5mm or less. delete The method of claim 1,
And the temperature protection circuit is configured to stop charging of the battery when the temperature of any one of the first and second batteries exceeds 40 ° C. according to a change in the resistance value of the thermistor. The method of claim 1,
The temperature protection circuit includes a comparison circuit and a transistor or an A / D converter and a microcontroller, and by connecting a resistor in parallel between the temperature sensor electrode and the negative power supply electrode of the first battery, according to the comparison circuit. The mobile phone battery mounting device, characterized in that configured to stop the charging of the battery when the temperature of any one of the first and second batteries exceeds 40 ℃. The method of claim 8,
And the magnitude of the resistance is determined in correspondence with the resistance value of the thermistor. The method of claim 1,
In order to keep the voltages of the first and second batteries the same, the battery connector is provided with an energy equalizer comprising a resistor and a comparator connected between the first and second batteries,
The rear cover is provided with an LED lamp,
And the LED lamp is turned on when the voltage difference between the first and second batteries connected in parallel is less than or equal to a set range. The method of claim 1,
The mobile phone battery mounting apparatus further includes an energy equalizer including a comparator and a transistor or an A / D converter and a microcontroller to maintain the voltages of the first and second batteries the same.
The charging electrode is electrically connected to the energy equalizer,
The energy equalizer further comprises a resistor, a comparator, and an LED lamp connected between the first and second batteries to maintain the voltages of the first and second batteries the same;
And the LED lamp is turned on when it is determined that the voltage difference between the first and second batteries connected in parallel is 20 mV or less. The method of claim 11,
The mobile phone battery mounting device is a mobile phone battery mounting device, characterized in that it comprises a fuse between both batteries to prevent the overcurrent flows therein. The method of claim 12,
And the fuse includes a PTC thermistor or a polymeric positive temperature coefficient device (PPTC), so that the fuse can be used without replacing the fuse. The method of claim 1,
The temperature protection circuit further comprises a PTC thermistor or a polymer positive temperature coefficient device (PPTC) between the two batteries to maintain the same voltage of the first and second batteries. The method of claim 11,
Mobile phone battery mounting device, characterized in that the size of the resistor is 1 kW to 10 kW. A mobile phone battery mounting apparatus for supplying power to the mobile phone main body by simultaneously installing a mobile phone main body, a first battery having a built-in thermistor, and a second battery and a third battery same as the first battery.
The mobile phone battery mounting apparatus may include a first battery connector configured to parallelly connect the first battery and a second battery stacked on the first battery, and a third battery connected to the third battery stacked on the second battery and the second battery in parallel. A second battery connector, and a rear cover coupled with the mobile phone body to receive the second battery, the third battery, the first battery connector, and the second battery connector;
The first battery connector protrudes downward to have a first terminal for electrically contacting the mobile phone body and the first battery, and a second side that is laterally spaced from the first terminal to be in electrical contact with the second battery. Including terminals,
The second battery connector protrudes downward to form a third terminal for electrically contacting the second battery and the third battery, and a second terminal that is laterally spaced apart from the third terminal to be in electrical contact with the third battery. Including 4 terminals,
The mobile phone main body may receive power from the first to third batteries,
The first and second battery connectors may each include a circumferential wall for accommodating the second and third batteries, and a plurality of grooves and protrusions may be formed on an upper surface of the first battery connector and a lower surface of the second battery connector, respectively. Is formed in a corresponding position, the projection is inserted into the groove when the first and second battery connector is stacked, the first and second battery connector is fixed,
A charging circuit and a charging electrode are formed on the rear cover, one end of the charging electrode is electrically connected to the fourth terminal, and the other end is exposed to the outside of the rear cover.
The first and second battery connectors include a temperature protection circuit that prevents the first to third batteries from overheating during charging.
And the temperature protection circuit is configured to stop charging when the temperature of any one of the first to third batteries exceeds 40 ° C by observing a resistance value change of the thermistor. delete delete A mobile phone main body, two batteries for supplying power to the mobile phone main body, a battery connector electrically connected to the mobile phone main body by connecting the two batteries in parallel, and the mobile phone main body to accommodate the two batteries and the battery connector. A method of using a mobile phone for simultaneously mounting a plurality of batteries in a mobile phone comprising a back cover coupled with,
A first step of assembling and mounting the mobile phone body, a battery connector, the two batteries, and a rear cover;
Measuring a voltage difference between the two batteries and disconnecting an electrical connection with one of the two parallel connected batteries when the voltage difference exceeds 20 mV, such that the mobile phone main body is powered by one battery; And
And a third step of restoring the connection of the battery cut off in the second step when the voltage difference is less than 20 mV so that the mobile phone main body is supplied with power by the two batteries.

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