KR20140036873A - Battery pack and mobile terminal having the same - Google Patents

Abstract

Provided are a battery pack and a mobile terminal having the same. The battery pack includes a first battery cell, a second battery cell, and a protection circuit module (PCM). The first battery cell is mounted in a battery groove. The second battery cell includes an overlapped part which is stacked and overlapped with at least a part of the first battery cell in a thickness direction; and an extended part which is extended from the overlapped part in the width direction of the first battery cell. The PCM has connection terminals electrically connected to the electrodes of the first and second battery cells to prevent the overcharge and overdischarge of the cells.

Description

BATTERY PACK AND MOBILE TERMINAL HAVING THE SAME}

The present invention relates to a mobile terminal having a battery pack having a new structure.

A mobile terminal is a portable electronic device that is portable and has one or more functions of voice and video call function, information input / output function, and data storing function.

As the functions of the mobile terminal are diversified, the mobile terminal is implemented in the form of a multimedia device having complicated functions such as photographing and photographing of a moving picture, reproduction of a music or video file, reception of a game and broadcasting.

Various new attempts have been made in terms of hardware or software to implement the complex functions of such multimedia devices. For example, a user interface (User Interface) environment is provided for a user to search for or select a function easily and conveniently. In another example, a reliability of a power supply is improved by changing a shape of a battery accommodating part.

In particular, as an improvement of the structural part of the terminal, a method of efficiently utilizing the internal space of the terminal and improving the design by changing the structure of the battery pack mounted on the terminal may be considered.

The present invention is to provide a battery pack of a new structure having a larger capacity by utilizing a limited space.

In addition, the present invention is to provide a battery pack and a mobile terminal having the same to secure a space for arranging the heating element and to reduce the waste space on the back of the terminal.

In order to solve the above problems, the battery pack according to an embodiment of the present invention, the first battery cell seated in the battery groove, the overlapping portion overlapping and stacked in the thickness direction with at least a portion of the first battery cell And a second battery cell including an extension part extending in the width direction of the first battery cell from the overlapping part, and electrodes of the first battery cell and the second battery cell to prevent overcharge and overdischarge of the cells. And a protection circuit module (PCM) having connection terminals electrically connected thereto.

As an example related to the present invention, the first battery cell includes a first electrode and a second electrode formed to be spaced apart from each other in the width direction, and the second battery cell is formed to be spaced apart from each other in the width direction. It includes four electrodes, the protective circuit module includes a connection terminal electrically connected to each of the terminals.

As another example related to the present invention, the first and second battery cells have the same shape, and one surface of the second battery cell corresponding to one surface of the first battery cell is opposite to the surface of the first battery cell. The first battery cell is disposed to face the second battery cell and overlaps the other surface of the second battery cell to face each other.

As another example related to the present invention, the second electrode and the third electrode overlap each other and are connected to the same connection terminal of the protective circuit module.

As another example related to the present invention, the first overlapping electrode connected to the first connection terminal of the protection circuit module by overlapping the first electrode and the third electrode, and the second electrode and the fourth electrode overlap each other. And a second overlapping electrode connected to the second connection terminal of the protection circuit module.

In order to solve the above problems, the mobile terminal according to an embodiment of the present invention includes a battery pack, a body having a battery groove on which the battery pack is seated, and a heating element mounted inside the body. . The battery pack extends in a width direction of the first battery cell from the overlapping portion and the overlapping portion overlapping and stacked in a thickness direction with at least a portion of the first battery cell and the first battery cell seated in the battery groove. And a second battery cell including an extension part formed to overlap the heating element in a thickness direction.

As an example related to the present invention, the mobile terminal includes a battery cover covering at least a portion of the body and the battery pack and having a curved edge curved in the thickness direction of the battery pack.

As another example related to the present invention, the battery pack includes a protection circuit module having connection terminals electrically connected to electrodes of the first and second battery cells.

As another example, the battery pack includes at least one overlapping electrode formed by overlapping electrodes of the first battery cell and electrodes of the second battery cell.

As the battery pack according to at least one embodiment of the present invention configured as described above is stacked so that two battery cells are crossed with each other, the use range of the battery pack space may be widened until the shape of the battery mounting space is not a rectangular parallelepiped. Through this, it is possible to supply a larger capacity battery by utilizing a limited space.

In addition, the present invention can stack two battery cells to cross each other and overlap the electrodes of different battery cells to reduce the number of terminals connected to the protection circuit module. As a result, the internal wiring of the battery pack can be reduced and the convenience of assembly and fabrication can be pursued.

In addition, by having a battery cell extending in width so as to overlap with the heat generating element can effectively utilize the rear space of the terminal, it is possible to minimize the wasted space even when the edge of the battery case is curved.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.
FIG. 2A is a perspective view of an example of a mobile terminal according to the present invention. FIG.
FIG. 2B is a rear perspective view of the mobile terminal shown in FIG. 2A. FIG.
3 is an exploded view of a battery pack according to an embodiment of the present invention.
4 is an exploded view of a battery pack according to another embodiment of the present invention.
5 is an exploded view of a battery pack according to another embodiment of the present invention.
6 is a conceptual view of the mobile terminal of FIG.
7 is a cross-sectional view of the mobile terminal of FIG. 2B viewed from the bottom;
8 is a conceptual diagram of a mobile terminal according to another embodiment of the present invention.

Hereinafter, a mobile terminal related to the present invention will be described in detail with reference to the drawings. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. In addition, the suffix "module" and " part "for constituent elements used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

The mobile terminal described in this specification may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), and navigation. However, it will be understood by those skilled in the art that the configuration according to the embodiment described herein may be applied to a fixed terminal such as a digital TV, a desktop computer, or the like, except when applicable only to the mobile terminal 100. [

The mobile terminal 100 includes a wireless communication unit 110, an audio / video input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, A controller 170, a controller 180, a power supply 190, and the like. The components shown in Fig. 1 are not essential, so that the mobile terminal 100 having more or fewer components may be implemented. Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 receives a broadcast signal and / or broadcast related information from an external broadcast management server through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may refer to a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast-related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast-related information may exist in various forms. For example, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

For example, the broadcast receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only Broadcast-Handheld (ISDB-T), Integrated Services Digital Broadcast-Terrestrial (ISDB-T), and the like. Of course, the broadcast receiving module 111 may be adapted to other broadcasting systems as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 100. WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) and the like can be used as wireless Internet technologies.

The short-range communication module 114 refers to a module for short-range communication. Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as a short range communication technology.

The position information module 115 is a module for obtaining the position of the mobile terminal 100, and a representative example thereof is a Global Position System (GPS) module.

Referring to FIG. 1, an A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ Two or more cameras 121 may be provided depending on the use environment.

The microphone 122 receives an external sound signal through a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static pressure / capacitance), a jog wheel, a jog switch, and the like.

The sensing unit 140 may sense the position of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence of the user, the orientation of the mobile terminal 100, And generates a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it may sense whether the slide phone is opened or closed. In addition, whether the power supply unit 190 is supplied with power, whether the interface unit 170 is coupled to the external device may be sensed. Meanwhile, the sensing unit 140 may include a proximity sensor 141.

The output unit 150 is for generating output related to the visual, auditory or tactile sense and includes a display unit 151, an audio output module 152, an alarm unit 153, and a haptic module 154 .

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal 100 is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the mobile terminal 100 is in the video communication mode or the photographing mode, the photographed and / or received video or UI and GUI are displayed.

The display unit 151 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), a flexible display display, and a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display unit 151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display portion 151 of the terminal body.

There may be two or more display units 151 according to the embodiment of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display portions 151 may be spaced apart from one another or may be arranged integrally with one another, or may be disposed on different surfaces.

(Hereinafter, referred to as a 'touch screen') in which a display unit 151 and a sensor for sensing a touch operation (hereinafter, referred to as 'touch sensor') form a mutual layer structure, It can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display unit 151 or a capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. As a result, the controller 180 can know which area of the display unit 151 is touched.

Referring to FIG. 1, a proximity sensor 141 may be disposed in an inner region of the mobile terminal 100 surrounded by the touch screen or near the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or a nearby object without mechanical contact using the force of an electromagnetic field or infrared rays. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

Examples of the proximity sensor include a transmission photoelectric sensor, a direct reflection photoelectric sensor, a mirror reflection photoelectric sensor, a high frequency oscillation proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of allowing the pointer to be recognized without being in contact with the touch screen so that the pointer is located on the touch screen is referred to as a "proximity touch", and the touch The act of actually touching the pointer on the screen is called "contact touch." The position where the pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding to the touch screen when the pointer is touched.

The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, and the like). Information corresponding to the detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

The sound output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. The sound output module 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The audio output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events generated in the mobile terminal 100 include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 151 or the audio output module 152 so that they may be classified as a part of the alarm unit 153.

The haptic module 154 generates various tactile effects that the user can feel. Vibration is a representative example of the haptic effect generated by the haptic module 154. The intensity and pattern of the vibration generated by the hit module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 154 may be used for stimulation such as a pin array vertically moving with respect to the contact skin surface, a jetting force or suction force of air through an injection or inlet, grazing to the skin surface, contact of an electrode, and electrostatic force. Various tactile effects can be generated, such as effects by the endothermic and the reproduction of a sense of cold using the elements capable of endotherm or heat generation.

The haptic module 154 can be implemented not only to transmit the tactile effect through the direct contact but also to allow the user to feel the tactile effect through the muscular sensation of the finger or arm. The haptic module 154 may include two or more haptic modules 154 according to the configuration of the portable terminal 100.

The memory 160 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 160 may store data on vibration and sound of various patterns outputted when a touch is input on the touch screen.

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM A disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data to the external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module is a chip for storing various information for authenticating the use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM), a general user authentication module A Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

When the mobile terminal 100 is connected to an external cradle, the interface unit 170 may be a path through which power from the cradle is supplied to the mobile terminal 100, or various commands A signal may be transmitted to the mobile terminal 100. The various command signals or the power source inputted from the cradle may be operated as a signal for recognizing that the mobile terminal 100 is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal 100. For example, voice communication, data communication, video communication, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180. [

The controller 180 may perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

The various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein include application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), and the like. It may be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing other functions. The described embodiments may be implemented by the controller 180 itself.

According to the software implementation, embodiments such as the procedures and functions described herein may be implemented as separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code can be implemented in a software application written in a suitable programming language. The software code is stored in the memory 160 and can be executed by the control unit 180. [

2A is a perspective view of a mobile terminal 100 according to an embodiment of the present invention. 2B is a rear perspective view of the mobile terminal 100 shown in FIG. 2A.

1, 2A, and 2B, the mobile terminal 100 includes a bar-shaped terminal body. However, the present invention is not limited thereto, and can be applied to various structures such as a slide type, a folder type, and a swing type in which two or more bodies are relatively movably coupled. Further, the mobile terminal 100 described herein may be any portable electronic device having a camera and flash, such as a mobile phone, a smart phone, a notebook computer, a digital broadcast terminal, a PDA Personal Digital Assistants), PMO (Portable Multimedia Player), and the like.

The terminal body includes a case (which may be referred to as a casing, a housing, a cover, and the like) that forms an appearance. The case includes a battery case 103 covering a front case 101 and a surface opposite to the front case 101 and a rear case 102 disposed between the front case 101 and the battery cover 103 Can be distinguished. Various electronic components are installed in a space formed between the front case 101 and the rear case 102. [ The cases may be formed by injection molding a synthetic resin, or may be formed to have a metal material such as stainless steel (STS) or titanium (Ti) or the like.

The terminal body includes a display unit 151, a first sound output unit 152, a signal input unit 120, and a front camera unit 121.

The display unit 151 includes an LCD (Liquid Crystal Display) module, an OLED (Organic Light Emitting Diodes) module, and an e-paper for visually expressing information. The display unit 151 may include touch sensing means for inputting data by a touch method. Hereinafter, the display unit 151 including the touch sensing unit will be referred to as a 'touch screen'. If there is a touch on any one place on the touch screen, contents corresponding to the touched position are input. The content input by the touch method may be a letter or a number, an instruction in various modes, a menu item which can be designated, and the like. The touch sensing means is formed in a light-transmissive manner so that the display unit 151 can be seen, and a structure for enhancing the visibility of the touch screen in a bright place may be included. According to FIG. 2A, the touch screen occupies most of the front surface of the front case 101.

The first sound output unit 152 may be implemented as a receiver for delivering a call sound to a user's ear or a loud speaker for outputting various alarm sounds or multimedia playback sounds.

The front camera unit 121 processes an image frame such as a still image or a moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [

The image frame processed by the front camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ The front camera unit 121 may be provided in two or more depending on the use environment.

The signal input unit 230 is operated to receive a command for controlling the operation of the mobile terminal 100, and may include a plurality of input keys. The input keys may also be referred to as a manipulating portion and may be employed in any manner as long as the user has a tactile sense and operates in a tactile manner.

For example, a dome switch or touch screen capable of receiving a command or information by a push or touch operation of a user, a touch pad, or a wheel, a jog type or a joystick for rotating a key . The contents input by the signal input unit 230 can be variously set. For example, to enter start, end, scroll, and the like.

A side key 132, an interface unit 170, and an acoustic input unit 122 are disposed on a side surface of the rear case 102.

The side key 132 may be collectively referred to as an operation unit and is capable of receiving a command for controlling the operation of the mobile terminal 100. The side key 132 may be employed in any manner as long as the user is operating in a tactile manner with a tactile impression. The contents input by the side key 132 can be variously set. For example, by the side key 132, commands such as control of the image input unit, adjustment of the size of the sound output from the sound output unit 152, or switching to the touch recognition mode of the display unit 151 can be received have.

The sound input unit 122 may be implemented, for example, in the form of a microphone to receive a user's voice, other sounds, or the like.

The interface unit 170 is a channel for allowing the mobile terminal 100 related to the present invention to exchange data with an external device. For example, the interface unit 170 may be a wired or wireless connection terminal for connecting to an earphone, a port for short-range communication (for example, an IrDA port, a Bluetooth port, a wireless LAN port Wireless LAN Port) or the like, or power supply terminals for supplying power to the mobile terminal 100. The interface unit 170 may be implemented as a socket for receiving an external card such as a SIM (Subscriber Identification Module) or a UIM (User Identity Module) or a memory card for storing information.

A power supply unit 190 and a rear camera unit 121 'are disposed on the rear surface of the terminal body.

A flash is disposed adjacent to the rear camera unit 121 '. The flash illuminates the subject toward the subject when the subject is photographed by the rear camera unit 121 '.

A mirror may be disposed adjacent to the flash. The mirror allows the user to illuminate the user's own face or the like in the case where the user intends to photograph the user himself / herself (self-photographing) using the rear camera unit 121 '.

The rear camera unit 121 'may have a photographing direction substantially opposite to that of the front camera unit 121 disposed on the front side and may be a camera having different pixels from the front camera unit 121.

For example, the front camera unit 121 has low pixels so that it is easy to capture a face of a user in the case of a video call or the like and send it to the other party. The rear camera unit 121 ' It is preferable to have a high pixel because it is often not transmitted. The front and rear camera units 121 and 121 'may be installed on the terminal body so as to be rotatable or pop-upable.

The battery supplies power to the mobile terminal 100. The battery may be built in the main body of the terminal or may be detachable from the outside of the main body of the terminal.

As described above in the background technology of the present invention, various designs are applied to the mobile terminal 100 recently developed and released to reflect the aesthetic needs of the user. To this end, research is being made to efficiently utilize the space by making the edge of the battery cover 103 curved to ergonomically design the terminal or reducing unnecessary space inside the terminal and arranging components to overlap each other. In addition, as the performance of terminals increases, demand for battery capacity increases. Hereinafter, the structure of the battery pack 200 that can satisfy both of these requirements will be described in detail.

3 is an exploded view of a battery pack 200 according to an embodiment of the present invention.

Referring to this figure, the battery pack 200 may include a first battery cell 210, a second battery cell 220, a protection circuit module 250, and the like. The first battery cell 210 includes a first electrode 211 and a second electrode 212. The second battery cell 220 includes a third electrode 221 and a fourth electrode 222. The electrodes may be formed to be exposed to the outside of the battery cell and may be electrically connected to an external power terminal.

The protection circuit module 250 is electrically connected to the electrodes of the battery cell and serves as a safety device to prevent the explosion of the battery pack 200. That is, the protection circuit module 250 is prevented from being charged to a voltage higher than the normal charging voltage to prevent overheating or explosion due to overcharging, the battery below a certain voltage to prevent damage to the battery pack 200 due to overdischarge Blocks the cell from being discharged, stops discharging when there is an abnormal current flow in the battery due to a device error, and instantly stops charging when a large amount of current flows in the battery pack 200 due to an external short circuit. do.

The protection circuit module 250 includes at least one connection terminal. Referring to FIG. 3, four connection terminals are formed in the protection circuit module 250 and are electrically connected to the first to fourth electrodes 222, respectively. The protection circuit module 250 includes a power supply terminal. The power terminal of the protection circuit module is electrically connected to the power terminal of the mobile terminal 100. That is, the protection circuit module 250 electrically connects the battery cell and the main body of the mobile terminal 100 and prevents each battery cell from being overcharged or overdischarged.

The first battery cell 210 and the second battery cell 220 are alternately overlapped with each other as shown. That is, the second battery cell 220 includes an overlapping portion that overlaps and is stacked in the thickness direction of at least a portion of the first battery cell 210 and the first battery cell 210, and the first battery cell 210 from the overlapping portion. It includes an extension extending in the width direction of the. Since the extension portion extends from the overlapping portion, an empty space is formed below the extension portion. This space can be utilized to efficiently arrange the internal circuits of the terminal.

In the figure, a case of two battery cells is illustrated for convenience, but the above structure may also be applied to three or more battery cells. For example, all three battery cells may be overlapped with each other, or the first battery cell 210 and the second battery cell 220 may each be a plurality of cell aggregates. That is, below, the first battery cell 210 and the second battery cell 220 include a cell complex in which a plurality of cells overlap each other.

4 is an exploded view of a battery pack 200 according to another embodiment of the present invention.

Referring to FIG. 4, the battery pack 200 includes at least one overlapping electrode formed by overlapping electrodes of the first battery cell 210 and the second battery cell 220 with each other. The first battery cell 210 includes a first electrode 211 and a second electrode 212, and the second battery cell 220 includes a third electrode 221 and a fourth electrode 222. As shown, the second electrode 212 and the third electrode 221 overlap each other to form an overlapping electrode. That is, the first electrode 211 is connected to the first connection terminal 251a of the protection circuit module 250, the overlapping electrode is connected to the second connection terminal 251b, and the fourth electrode 222 is connected to the third connection terminal 251c. ) Is connected.

The power terminal 252 of the protection circuit module 250 contacts the power terminal of the mobile terminal 100 or the terminal of the charger to electrically connect the battery cells and the terminal or the charger.

5 is an exploded view of a battery pack 200 according to another embodiment of the present invention.

Referring to FIG. 5, the battery pack 200 includes two overlapping electrodes formed by overlapping electrodes of the first battery cell 210 and the second battery cell 220. The first battery cell 210 includes a first electrode 211 and a second electrode 212, and the second battery cell 220 includes a third electrode 221 and a fourth electrode 222. As illustrated, the first electrode 211 and the fourth electrode 222 overlap each other to form a first overlapping electrode 231, and the second electrode 212 and the third electrode 221 overlap each other. The second overlapping electrode 241 is formed. That is, the first overlapping electrode 231 is connected to the first connection terminal 251a of the protection circuit module 250, and the second overlapping electrode 241 is connected to the second connection terminal 251b.

FIG. 6 is a conceptual view of the mobile terminal 100 of FIG. 2B viewed from the rear side, and FIG. 7 is a cross-sectional view of the mobile terminal 100 of FIG. 2B viewed from the bottom surface thereof.

Referring to the drawings, a printed circuit board is mounted inside the mobile terminal, and heating elements 183 are mounted on one surface of the printed circuit board. As shown, the battery groove 192 is formed to be recessed toward the inside of the terminal from the back of the terminal and the heat generating element 183 is mounted on the lower portion of the non-recessed surface.

In other words, according to FIG. 6, the terminal body may include a first region in which the printed circuit board is disposed and a second region in which the printed circuit board is not disposed when viewed from the rear of the terminal. The battery groove 192 is formed in the second region and the heat generating element 183 is disposed in the first region.

According to another embodiment of the present invention, the mounting groove 192a may be formed in the first region. The seating groove 192a is recessed toward the heat generating element 183 from the outer surface of the terminal in the thickness direction of the heat generating element 183.

The battery pack 200 may be seated in the battery groove 192. More specifically, the battery pack 200 includes a protection circuit module including a first battery cell 210 and a second battery cell 220 overlapping each other and a casing and a charging terminal formed to surround the cells. 250). The first battery cell 210 is seated in the battery groove 192. The second battery cell 220 includes an overlapping portion overlapping and stacked in at least a portion of the first battery cell 210 in the thickness direction, and an extension part extending in the width direction of the first battery cell 210 from the overlapping portion. do. The extension part is seated in the seating groove 192a and overlaps the heating element 183 in the thickness direction. In an embodiment in which the seating groove 192a is not formed, the extension part overlaps the rear surface of the terminal and overlaps the thickness direction of the heating element 183.

The second battery cell 220 may be formed to protrude from the rear surface of the terminal. In other words, the second battery cell 220 may be formed thicker than the thickness of the mounting groove 192a as shown in FIG. 2B.

According to one embodiment of the invention, the battery cover 103 covers at least a portion of the terminal body and the battery pack 200, and has a curved edge that is bent in the thickness direction of the battery pack 200. In other words, the mobile terminal 100 equipped with the battery cover 103 has a shape in which the thickness becomes thinner toward the edge. The central part of the terminal has a larger space and the closer the edge is, the thinner the terminal is.

8 is a conceptual diagram of a mobile terminal 100 according to another embodiment of the present invention.

Referring to FIG. 8, a printed circuit board is mounted inside the mobile terminal, and heating elements 183 are mounted on one surface of the printed circuit board. As shown, the battery groove 192 is formed to be recessed toward the inside of the terminal from the back of the terminal and the heat generating element 183 is mounted on the lower portion of the non-recessed surface.

In other words, according to FIG. 8, the terminal body may include a first region in which the printed circuit board is disposed and a second region in which the printed circuit board is not disposed when viewed from the rear of the terminal. The battery groove 192 is formed in the second region and the heat generating element 183 is disposed in the first region.

According to another embodiment of the present invention, the mounting groove 192a may be formed in the first region. The seating groove 192a is recessed toward the heat generating element 183 from the outer surface of the terminal in the thickness direction of the heat generating element 183.

The battery pack 200 may be seated in the battery groove 192. More specifically, the battery pack 200 includes a protection circuit module including a first battery cell 210 and a second battery cell 220 overlapping each other and a casing and a charging terminal formed to surround the cells. 250). The first battery cell 210 is seated in the battery groove 192. The second battery cell 220 includes an overlapping portion overlapping and stacked in at least a portion of the first battery cell 210 in the thickness direction, and an extension part extending in the width direction of the first battery cell 210 from the overlapping portion. do. The extension part is seated in the seating groove 192a and overlaps the heating element 183 in the thickness direction. In an embodiment in which the seating groove 192a is not formed, the extension part overlaps the rear surface of the terminal and overlaps the thickness direction of the heating element 183.

The second battery cell 220 may be formed to protrude from the rear surface of the terminal. In other words, the second battery cell 220 may be formed thicker than the thickness of the mounting groove 192a as shown in FIG. 2B.

As the battery pack 200 according to at least one embodiment of the present invention configured as described above is stacked so that two battery cells are staggered from each other, the use range of the battery pack space may be widened until the shape of the battery mounting space is not a rectangular parallelepiped. . Through this, it is possible to supply a larger capacity battery by utilizing a limited space.

In addition, the present invention can stack the two battery cells to cross each other and overlap the electrodes of different battery cells to reduce the number of terminals connected to the protection circuit module 250. Therefore, the internal wiring of the battery pack 200 may be reduced, and convenience of assembly and fabrication may be pursued.

In addition, the battery cell having a width extending so as to overlap with the heat generating element 183 can effectively utilize the rear space of the terminal, it is possible to minimize the wasted space even when the edge of the battery case is curved.

The mobile terminal 100 described above is not limited to the configuration and method of the embodiments described above, but the embodiments may be configured by selectively combining all or part of the embodiments so that various modifications can be made. .

Claims (9)

A first battery cell seated in a battery groove;
A second battery cell including an overlapping part overlapping and stacked in at least a portion of the first battery cell in a thickness direction and an extension part extending from the overlapping part in a width direction of the first battery cell; And
A battery pack comprising a protection circuit module (PCM) having a connection terminal electrically connected to the electrodes of the first battery cell and the second battery cell to prevent overcharging and over-discharge of the cells. . The method of claim 1,
The first battery cell includes a first electrode and a second electrode spaced apart from each other in the width direction,
The second battery cell includes a third electrode and a fourth electrode spaced apart from each other in the width direction,
The protection circuit module comprises a connection terminal electrically connected to the terminals, respectively. The method of claim 1,
The first and second battery cells have the same shape,
One surface of the second battery cell corresponding to one surface of the first battery cell is disposed to face in a direction opposite to the surface of the first battery cell so that one surface of the first battery cell and the other surface of the second battery cell face each other. Battery pack characterized in that. 3. The method of claim 2,
And the second electrode and the third electrode overlap each other and are connected to the same connection terminal of the protective circuit module. 3. The method of claim 2,
A first overlapping electrode connected to the first connection terminal of the protection circuit module by overlapping the first electrode and the third electrode;
And a second overlapping electrode connected to the second connection terminal of the protection circuit module by overlapping the second electrode and the fourth electrode. A battery pack;
A body having a battery groove in which the battery pack is seated; And
It includes a heating element mounted inside the body,
The battery pack (100)
A first battery cell seated in the battery groove; And
And an overlapping portion overlapping and stacking at least a portion of the first battery cell in a thickness direction, and an extension portion extending from the overlapping portion in the width direction of the first battery cell and overlapping the heating element in the thickness direction. A mobile terminal comprising two battery cells. The method according to claim 6,
And a battery cover covering at least a portion of the body and the battery pack, the battery cover having a curved edge curved in the thickness direction of the battery pack. The method according to claim 6,
The battery pack (100)
And a protective circuit module having connection terminals electrically connected to the electrodes of the first and second battery cells. 9. The method of claim 8,
The battery pack (100)
And at least one overlapping electrode formed by overlapping an electrode of the first battery cell and an electrode of the second battery cell.

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