WO2017179765A1

WO2017179765A1 - Battery charger and battery pack

Info

Publication number: WO2017179765A1
Application number: PCT/KR2016/007031
Authority: WO
Inventors: Min Kim; Kangsong LEE; Kyungjong Kim; Siyoung Park
Original assignee: Lg Electronics Inc.
Priority date: 2016-04-12
Filing date: 2016-06-30
Publication date: 2017-10-19
Also published as: KR101812182B1; KR20170116799A

Abstract

A battery charger includes a housing containing a mounting unit, a connection unit projected from one side of a first face of the mounting unit, and a fixing unit which is extended in parallel with the first face of the mounting unit, a plurality of power supply terminals projected from the connection unit of the housing, a plurality of identification switches projected from the connection unit of the housing in a manner of being separated from the power supply terminal, and a controller configured to control power supplied from the power supply terminal according to a signal generated by the identification switch. Since the battery charger has versatility capable of charging various types of batteries, it is able to solve a problem of providing a battery charger according to a terminal or a problem of separately buying a battery charger according to a terminal.

Description

BATTERY CHARGER AND BATTERY PACK

The present invention relates to a battery charger and a battery pack usable for the battery charger. More particularly, the present invention relates to a battery charger capable of charging various types of batteries and a battery pack.

Terminals may be generally classified as mobile/portable terminals or stationary terminals according to their mobility. Mobile terminals may also be classified as handheld terminals or vehicle mounted terminals according to whether or not a user can directly carry the terminal.

Mobile terminals have become increasingly more functional. Examples of such functions include data and voice communications, capturing images and video via a camera, recording audio, playing music files via a speaker system, and displaying images and video on a display. Some mobile terminals include additional functionality which supports game playing, while other terminals are configured as multimedia players. More recently, mobile terminals have been configured to receive broadcast and multicast signals which permit viewing of content such as videos and television programs.

As such functions become more diversified, the mobile terminal can support more complicated functions such as capturing images or video, reproducing music or video files, playing games, receiving broadcast signals, and the like. By comprehensively and collectively implementing such functions, the mobile terminal may be embodied in the form of a multimedia player or device.

As the functions of the terminal are diversified, power consumption of the terminal is increasing. Hence, there exists needs for a high volume battery or a replaceable battery. Although a mobile terminal equipped with a battery of increased volume and a replaceable battery is releasing, there is a discomfort with carrying a battery-dedicated charging cradle due to a different specification per battery.

The present invention relates to a battery charger and a battery pack usable for the battery charger. One object of the present invention is to provide a battery charger capable of charging various types of batteries and a battery pack.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, according to one embodiment, a battery charger includes a housing containing a mounting unit, a connection unit projected from one side of a first face of the mounting unit, and a fixing unit which is extended in parallel with the first face of the mounting unit, a plurality of power supply terminals projected from the connection unit of the housing, a plurality of identification switches projected from the connection unit of the housing in a manner of being separated from the power supply terminal, and a controller configured to control power supplied by the power supply terminal according to a signal generated by the identification switch.

The mounting unit, the connection unit and the fixing unit are arranged by forming a shape of U and the power supply terminal and the identification switch can be arranged between the mounting unit and the fixing unit.

The power supply terminal can be more projected compared to the identification switch.

The power supply terminal can be formed on a terminal base projected from the connection unit.

The controller can differentiate voltage of power supplied by the power supply terminal according to a combination of switches for generating a signal among a plurality of the identification switches.

The battery charger can further include an operation unit capable of adjusting a space of a plurality of the power supply terminals.

The battery charger can further include a battery pack, which is inserted between the mounting unit and the fixing unit.

The battery pack can include a case into which a battery is inserted and the case including a first face and a first side, a terminal opening formed at a location corresponding to the power supply terminal of the first side, and an identification bump formed at a location corresponding to the identification switch of the first side.

The case can include a first part, which is inserted between the mounting unit and the fixing unit, of first thickness corresponding to a distance between the mounting unit and the fixing unit and a second part of second thickness thicker than the first thickness.

The first part can include a guide groove of a shape corresponding to a shape of the fixing unit.

Positions of the guide groove, the terminal opening and the identification bump may respectively correspond to positions of the fixing unit, the power supply terminal and the identification switch.

The battery charger can further include a mounting wall for fixing a position of the battery positioned at the inside of the case to make a charging terminal of the battery locate at the terminal opening.

A position of the mounting wall may vary in the inside of the case.

To further achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, according to a different embodiment, a battery pack includes a case into which a battery is inserted and the case including a first face and a first side, a terminal opening formed on the first side of the case, a guide groove formed at a location adjacent to the first side of the first face of the case, and an identification bump formed on the first side of the case in a manner of being separated from the terminal opening.

The battery pack can further include a mounting wall for fixing a position of the battery positioned at the inside of the case to make a charging terminal of the battery locate at the terminal opening.

The battery pack can further include a fixed bump formed on the guide groove.

Since a battery charger according to the present invention has versatility capable of charging various types of batteries, it is able to solve a problem of providing a battery charger or a problem of separately buying a battery charger according to a terminal.

And, since it is able to configure a battery pack by improving a structure of a battery case, which is previously used for packing a battery, it is able to use a battery charger without any additional cost.

And, if a user carries a battery pack only, the user is able to charge a battery at any place where a battery charger exists, thereby increasing portability.

Effects obtainable from the present invention may be non-limited by the above mentioned effect. And, other unmentioned effects can be clearly understood from the following description by those having ordinary skill in the technical field to which the present invention pertains. It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1a is a block diagram for explaining a mobile terminal according to the present invention;

FIGS. 1b and 1c are conceptual diagrams for an example of a mobile terminal viewed from a different direction according to the present invention;

FIG. 2 is a block diagram for explaining a configuration of a battery charger according to the present invention;

FIG. 3 is a diagram for a state that a battery charger and a battery pack are combined with each other according to the present invention;

FIG. 4 is a perspective diagram for a battery charger viewed from one side according to the present invention;

FIG. 5 is a diagram for a battery pack according to the present invention;

FIG. 6 is a diagram for a shape that a battery pack and a battery are combined with each other according to the present invention;

FIG. 7 is a diagram for various embodiments for a state that a battery pack and a battery are combined with each other according to the present invention.

Description will now be given in detail according to exemplary embodiments disclosed herein, with reference to the accompanying drawings. For the sake of brief description with reference to the drawings, the same or equivalent components may be provided with the same reference numbers, and description thereof will not be repeated. In general, a suffix such as "module" and "unit" may be used to refer to elements or components. Use of such a suffix herein is merely intended to facilitate description of the specification, and the suffix itself is not intended to give any special meaning or function. In the present disclosure, that which is well-known to one of ordinary skill in the relevant art has generally been omitted for the sake of brevity. The accompanying drawings are used to help easily understand various technical features and it should be understood that the embodiments presented herein are not limited by the accompanying drawings. As such, the present disclosure should be construed to extend to any alterations, equivalents and substitutes in addition to those which are particularly set out in the accompanying drawings.

It will be understood that although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are generally only used to distinguish one element from another.

It will be understood that when an element is referred to as being "connected with" another element, the element can be directly connected with the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected with" another element, there are no intervening elements present.

A singular representation may include a plural representation unless it represents a definitely different meaning from the context. Terms such as "include" or "has" are used herein and should be understood that they are intended to indicate an existence of several components, functions or steps, disclosed in the specification, and it is also understood that greater or fewer components, functions, or steps may likewise be utilized.

Mobile terminals presented herein may be implemented using a variety of different types of terminals. Examples of such terminals include cellular phones, smart phones, user equipment, laptop computers, digital broadcast terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigators, portable computers (PCs), slate PCs, tablet PCs, ultra books, wearable devices (for example, smart watches, smart glasses, head mounted displays (HMDs)), and the like.

By way of non-limiting example only, further description will be made with reference to particular types of mobile terminals. However, such teachings apply equally to other types of terminals, such as those types noted above. In addition, these teachings may also be applied to stationary terminals such as digital TV, desktop computers, and the like.

Reference is now made to FIGS. 1A-1C, where FIG. 1A is a block diagram of a mobile terminal in accordance with the present disclosure, and FIGS. 1B and 1C are conceptual views of one example of the mobile terminal, viewed from different directions.

The mobile terminal 100 is shown having components such as a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a controller 180, and a power supply unit 190.

It is understood that implementing all of the illustrated components in The Fig. 1A is not a requirement, and that greater or fewer components may alternatively be implemented.

The wireless communication unit 110 typically includes one or more modules which permit communications such as wireless communications between the mobile terminal 100 and a wireless communication system, communications between the mobile terminal 100 and another mobile terminal, communications between the mobile terminal 100 and an external server. Further, the wireless communication unit 110 typically includes one or more modules which connect the mobile terminal 100 to one or more networks.

To facilitate such communications, the wireless communication unit 110 includes one or more of 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 input unit 120 includes a camera 121 for obtaining images or video, a microphone 122, which is one type of audio input device for inputting an audio signal, and a user input unit 123 (for example, a touch key, a push key, a mechanical key, a soft key, and the like) for allowing a user to input information. Data (for example, audio, video, image, and the like) is obtained by the input unit 120 and may be analyzed and processed by controller 180 according to device parameters, user commands, and combinations thereof.

The sensing unit 140 is typically implemented using one or more sensors configured to sense internal information of the mobile terminal, the surrounding environment of the mobile terminal, user information, and the like. For example, in FIG. 1A, the sensing unit 140 is shown having a proximity sensor 141 and an illumination sensor 142.

If desired, the sensing unit 140 may alternatively or additionally include other types of sensors or devices, such as a touch sensor, an acceleration sensor, a magnetic sensor, a G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared (IR) sensor, a finger scan sensor, a ultrasonic sensor, an optical sensor (for example, camera 121), a microphone 122, a battery gauge, an environment sensor (for example, a barometer, a hygrometer, a thermometer, a radiation detection sensor, a thermal sensor, and a gas sensor, among others), and a chemical sensor (for example, an electronic nose, a health care sensor, a biometric sensor, and the like), to name a few. The mobile terminal 100 may be configured to utilize information obtained from sensing unit 140, and in particular, information obtained from one or more sensors of the sensing unit 140, and combinations thereof.

The output unit 150 is typically configured to output various types of information, such as audio, video, tactile output, and the like. The output unit 150 is shown having a display unit 151, an audio output module 152, a haptic module 153, and an optical output module 154. The display unit 151 may have an inter-layered structure or an integrated structure with a touch sensor in order to facilitate a touch screen. The touch screen may provide an output interface between the mobile terminal 100 and a user, as well as function as the user input unit 123 which provides an input interface between the mobile terminal 100 and the user.

The interface unit 160 serves as an interface with various types of external devices that can be coupled to the mobile terminal 100. The interface unit 160, for example, may include any of wired or wireless ports, external power supply ports, wired or wireless data ports, memory card ports, ports for connecting a device having an identification module, audio input/output (I/O) ports, video I/O ports, earphone ports, and the like. In some cases, the mobile terminal 100 may perform assorted control functions associated with a connected external device, in response to the external device being connected to the interface unit 160.

The memory 170 is typically implemented to store data to support various functions or features of the mobile terminal 100. For instance, the memory 170 may be configured to store application programs executed in the mobile terminal 100, data or instructions for operations of the mobile terminal 100, and the like. Some of these application programs may be downloaded from an external server via wireless communication. Other application programs may be installed within the mobile terminal 100 at time of manufacturing or shipping, which is typically the case for basic functions of the mobile terminal 100 (for example, receiving a call, placing a call, receiving a message, sending a message, and the like). It is common for application programs to be stored in the memory 170, installed in the mobile terminal 100, and executed by the controller 180 to perform an operation (or function) for the mobile terminal 100.

The controller 180 typically functions to control overall operation of the mobile terminal 100, in addition to the operations associated with the application programs.

The controller 180 may provide or process information or functions appropriate for a user by processing signals, data, information and the like, which are input or output by the various components depicted in Fig. 1A, or activating application programs stored in the memory 170. As one example, the controller 180 controls some or all of the components illustrated in FIGS. 1A-1C according to the execution of an application program that have been stored in the memory 170.

The power supply unit 190 can be configured to receive external power or provide internal power in order to supply appropriate power required for operating elements and components included in the mobile terminal 100. The power supply unit 190 may include a battery, and the battery may be configured to be embedded in the terminal body, or configured to be detachable from the terminal body.

In case of a battery of a replaceable type, it is necessary to have a battery charger to charge the battery. In case of a legacy battery, the number of terminals, pin arrangement of a terminal, voltage and the like vary according to a mobile terminal. Hence, there is a problem that it is necessary to have a battery-dedicated battery charger. In order to solve the problem, the present invention provides a versatile battery charger and a battery pack for fixing a battery to the battery charger.

FIG. 2 is a block diagram for explaining a configuration of a battery charger 300 according to the present invention. Referring to FIG. 2, the battery charger 300 according to the present invention includes a controller 380, a power supply unit 340, a power supply terminal 320, a display unit 350, an identification switch 330, and an operation unit 360.

The battery charger 300 is equipped with the power supply unit 340 and the power supply terminal 320 to supply power to a battery 191. The power supply unit 340 includes a connector into which a power cable connected with external power is inserted and may further include a battery in the inside of a housing to make the battery charger 300 itself function as a portable charger.

Or, power can also be supplied by a wireless charging scheme without a connector. Wireless charging can deliver power using at least one of an inductive coupling scheme based on a magnetic induction phenomenon and a magnetic resonance coupling scheme based on an electromagnetic resonance phenomenon.

The power supply terminal 320 supplies power supplied from the power supply unit 340 to the battery 191 by contacting with a charging terminal 192 of the battery 191. It may have a plurality of power supply terminals 320 depending on the charging terminal 192 of the battery 191. A function of each of a plurality of the power supply terminals may vary according to the battery 191.

Since a voltage level of power supplied to the power supply terminal 320 varies according to the battery 191, it may be able to charge the battery only when a designated battery charger 300 is used according to the battery 191. Although charging is feasible using a different charger, if power is not supplied by a precise voltage, it is impossible to completely charge the battery 191 and a service life of the battery 191 can be shortened.

Hence, in order to charge an external battery 191, it is necessary to separately buy a battery charger 300. In particular, since a battery charger 300 is designated according to a battery 191, it is necessary to carry not only the battery 191 but also the battery charger 300 to charge the battery. Hence, a user may feel a discomfort.

The battery charger 300 according to the present invention obtains voltage of the battery 191 and terminal information using an identification switch 330 and may be then able to differently control voltage of power supplied from the power supply terminal 320 and PIN arrangement (+/-) of the terminal.

If a space of a terminal of the battery 191 and a space of the power supply terminal 320 are different from each other, the operation unit 360 can adjust the space of the power supply terminal 320. The display unit 350 can indicate whether or not a battery is charging using a display for outputting specific information or a light source that color is changing.

FIG. 3 is a diagram for a state that a battery charger and a battery pack are combined with each other according to the present invention and FIG. 4 is a perspective diagram for a battery charger viewed from one side according to the present invention. The battery charger 300 according to the present invention charges a battery 191 in a manner of being combined with a battery pack 200 in which the battery 191 is accommodated. The battery charger includes a mounting unit 311 including a first face, a connection unit 312 projected from one side of the first face of a mounting unit 311 and a housing 310 including a fixing unit 313, which is extended in parallel with the first face of the mounting unit 311. The mounting unit 311, the connection unit 312 and the fixing unit 313 are arranged to form a U shape and the battery pack 200 is inserted into a space formed by the mounting unit, the connection unit 312 and the fixing unit 313.

The mounting unit 311 is arranged in parallel with the fixing unit 313 and the connection unit 312 is located between the mounting unit and the fixing unit to maintain a space between the mounting unit 311 and the fixing unit 313. The mounting unit 311 and the fixing unit 313 are respectively in contact with one side and another side of the battery pack 200 and the connection unit 312 is in contact with a side of one side of the battery pack 200.

As shown in FIG. 4, the power supply terminal 320 and the identification switch 330 are deployed at the connection unit 312, the power supply terminal 320 is in contact with a charging terminal 192, which is exposed via one side of the battery pack 200, of the battery 191, and the identification switch 330 is in contact with a bump formed at one side of the battery pack 200.

The battery pack 200 corresponds to a case 210 into which the battery 191 is inserted to fix the battery 191 at the battery charger 300 according to the present invention. In general, the battery pack 200 can be configured by remodeling a shape of the case 210, which is provided together with the battery 191. The battery pack 200 includes the case 210, an opening formed on the case 210, and an identification bump.

The case is made of an injected material and can accommodate the battery 191 in the inside of the case. When the battery 191 is distributed, the battery pack 200 is provided together with the battery 191 to protect the battery 191. The battery pack 200 can be used as a case 210 for carrying the battery 191 when a user carries the battery 191. In addition, according to the present invention, it may be able to charge batteries 191 of various specifications by the battery charger 300 using the battery pack 200 capable of being inserted into the battery charger 300.

FIG. 5 is a diagram for a battery pack 200 according to the present invention. A basic configuration of the battery pack corresponds to a case 210 including a first face, a second face and a side forming a circumference between the first face and the second face. A guide groove 240 corresponding to a shape of the fixing unit 313 of the battery charger 300 is formed on the first side of the case 210 and the guide groove plays a role of a guide when the battery pack 200 and the battery charger 300 are combined with each other.

A guide groove 240 corresponding to a shape of the mounting unit 311 of the battery charger 300 can also be formed on the second side of the case. If a size or a shape of the fixing unit 313 and a size or a shape of the mounting unit 311 are differentiated from that of FIG. 3, a size and a shape of the guide groove 240 can be differentiated on one side and another side of the case. Hence, it may be able to guide a direction into which the battery pack 200 is inserted.

As shown in FIG. 5, it may be able to form a first fixed bump 245 on the guide groove 240. The first fixed bump 245 is locked with a second fixed bump (not depicted), which is formed on the fixing unit 313 of the battery charger 300 and has a shape corresponding to a shape of the first fixed bump 245, and prevents the battery pack 200 from being deviated from the battery charger 300.

The battery pack 200 includes a first part on which the guide groove 240 is formed and a second part thicker than the first part. Since the first part is manufactured in accordance with a shape of the battery charger 300, first thickness of the first part is constant. Since the second part is not overlapped with the battery charger 300, there is no restriction on second thickness of the second part.

An opening 220 for exposing a charging terminal 192 of a battery 191 is formed on a first side of the battery pack 200 and the opening 220 is in contact with a power supply terminal 320 located at the connection unit 312 of the battery charger 300.

Since the power supply terminal 320 is in contact with the charging terminal 192 of the battery 191 positioned at the inside of the battery pack 200, the power supply terminal can be positioned in a manner of being more projected compared to the identification bump. For example, as shown in FIG. 4, the power supply terminal 320 can be deployed at a location more projected than the identification terminal in a manner of being positioned at a terminal base 321 projected from the connection unit 312. In this case, an opening 220 of the battery pack 200 is formed by a shape corresponding to a shape of the terminal base 321 to combine the battery pack 200 and the battery charger 300 with each other in a manner that the terminal base 321 is inserted into the opening 220.

As shown in FIG. 5, an identification bump may have a form of a bump projected from a first side of a case 210. Or, as shown in FIG. 7, the identification bump may have a form of a groove (hole) formed on the first side of the case 210.

In case of the former identification bump, since the bump pushes the identification switch 330 and an identification switch located at a part where the bump is not formed is not pushed, a controller 380 detects a signal of the identification switch 330 pushed by the bump and may be then able to identify information on a battery 191 inserted into the battery pack 200.

In case of the latter identification bump, since a groove does not push the switch and an identification switch 330 located at a part where the groove is not formed is pushed, the controller 380 detects the identification switch, which is not pushed by the groove, and may be then able to identify information on the battery 191 inserted into the battery pack 200.

For example, when voltage supplied by the power supply terminal 320 is controlled by a signal detected by 3 identification switches, it may be able to differently supply voltage according to 8 cases. In particular, when the n number of switches are used, voltage can be divided into the 2ⁿ number of voltages. Table 1 in the following shows an embodiment of differently controlling supply voltage using 3 switches.

First switch	Second switch	Third switch	Supply voltage
ON	OFF	OFF	4.30V
OFF	ON	OFF	4.35V
OFF	OFF	ON	4.40V
ON	ON	OFF	4.45V
OFF	ON	ON	4.50V
ON	OFF	ON	4.55V
OFF	OFF	OFF	4.60V
ON	ON	ON	4.65V

It may be able to change not only strength of supply voltage but also pin arrangement of the power supply terminal 320. For example, in case of a battery 191 including 4 terminals, the battery can include not only +/- terminal but also an ID terminal for providing temperature information (Th) of the battery 191 and information on an attribute of the battery 191. Since an arrangement of each terminal varies according to the battery 191, pin arrangement of a terminal may vary according to a signal detected by the identification switch 330.

Or, a space of the power supply terminal 320 can be adjusted via the operation unit 360 by providing information on a space between charging terminals 192. The number of identification terminals may increase or decrease according to the amount of the information.

Positions of the identification bump and the opening 220 should be arranged at locations corresponding to the identification switch 330 and the power supply terminal 320 of the battery charger 300. Hence, although a size of the battery pack 200 varies, locations of the guide groove 240, the identification bump and the opening are constantly maintained.

FIG. 6 is a diagram for various embodiments for a state that a battery pack and a battery are combined with each other according to the present invention. As shown in FIG. 6, a shape of the battery pack 200 is differentiated according to a type of a battery 191. Yet, as mentioned in the foregoing description, positions of a guide groove 240, an identification bump, and an opening 220 are constantly maintained.

Since the number of the identification bump varies according to a type, when a position of the guide groove 240 is compared with a position of the opening 220, a distance between a center of (a) to (c) guide grooves 240 and a center of the opening 220 is constantly maintained by A. A position of the power supply terminal 320 is fixed for the fixing unit 313 of the battery charger 300. Hence, the position is constantly fixed to match with the distance.

Instead, a size except the positions of the guide groove240, the identification bump and the opening 220 can be changed according to a size of the battery 190. Hence, as shown in FIG. 6 (a) to (c), it may be able to install a battery pack 200 of various shapes.

Since a position of the opening 220 of the battery pack 200 should be matched with a position of a charging terminal 192 of the battery 191, as shown in FIG. 6 (a), it may have an asymmetrical shape on the basis of the guide groove 240. Yet, in case of having a symmetrical shape, it may be able to more stably combine the battery with the battery pack. Hence, in order to use the battery pack 200, which is symmetrical on the basis of the guide groove 240, it may be able to further include a mounting wall 250 to fix a position of the battery 191 in the inside of the battery pack 200.

FIG. 7 is a diagram for a shape that a battery pack 200 and a battery 191 are combined with each other according to the present invention. It is able to include a mounting wall 250 for fixing a position of the battery 191 to make a position of a charging terminal 192 of the battery 191 positioned at the inside of the battery pack 200 locate at an opening 220 of the battery pack 200. The mounting wall 250 may be formed at an entire side of the battery pack 200. Or, as shown in FIG. 6 (b) or Fig. 7, the mounting wall can be configured as a partly projected from.

Since a battery charger 300 according to the present invention has versatility capable of charging various types of batteries 191, it is able to solve a problem of separately buying a battery charger 300 according to a terminal.

And, since it is able to configure a battery pack 200 by improving a structure of a battery case, which is previously used for packing a battery, it is able to use a battery charger 300 without any additional cost.

And, if a user carries a battery pack 200 only, the user is able to charge a battery at any place where a battery charger 300 exists, thereby increasing portability.

The foregoing embodiments are merely exemplary and are not to be considered as limiting the present disclosure. The present teachings can be readily applied to other types of methods and apparatuses. This description is intended to be illustrative, and not to limit the scope of the claims.

Claims

A battery charger, comprising:

a housing containing a mounting unit, a connection unit projected from one side of a first face of the mounting unit, and a fixing unit which is extended in parallel with the first face of the mounting unit;

a plurality of power supply terminals projected from the connection unit of the housing;

a plurality of identification switches projected from the connection unit of the housing in a manner of being separated from the power supply terminals; and

a controller configured to control power supplied by the power supply terminal according to a signal generated by the identification switch.
The battery charger of claim 1, wherein the mounting unit, the connection unit and the fixing unit are arranged by forming a shape of U and wherein the power supply terminal and the identification switch are arranged between the mounting unit and the fixing unit.
The battery charger of claim 1, wherein the power supply terminal is more projected compared to the identification switch.
The battery charger of claim 1, wherein the power supply terminal is formed on a terminal base projected from the connection unit.
The battery charger of claim 1, wherein the controller is configured to differentiate voltage of power supplied by the power supply terminal or pin arrangement of the power supply terminal according to a combination of switches for generating a signal among a plurality of the identification switches.
The battery charger of claim 1, further comprising an operation unit is capable of adjusting a space of a plurality of the power supply terminals.
The battery charger of claim 1, further comprising a battery pack, which is inserted between the mounting unit and the fixing unit,

wherein the battery pack comprises:

a case into which a battery is inserted and the case containing a first face and a first side,

a terminal opening formed at a location corresponding to the power supply terminal of the first side, and

an identification bump formed at a location corresponding to the identification switch of the first side.
The battery charger of claim 7, wherein the case comprises a first part, which is inserted between the mounting unit and the fixing unit, of first thickness corresponding to a distance between the mounting unit and the fixing unit and a second part of second thickness thicker than the first thickness.
The battery charger of claim 8, wherein the first part comprises a guide groove of a shape corresponding to a shape of the fixing unit.
The battery charger of claim 9, wherein positions of the guide groove, the terminal opening and the identification bump respectively correspond to positions of the fixing unit, the power supply terminal and the identification switch.
The battery charger of claim 7, further comprising a mounting wall for fixing a position of the battery positioned at the inside of the case to make a charging terminal of the battery locate at the terminal opening.
The battery charger of claim 7, further comprising a mounting wall for fixing a position of the battery positioned at the inside of the case to make a charging terminal of the battery locate at the terminal opening.
A battery pack, comprising:

a case into which a battery is inserted and the case containing a first face and a first side;

a terminal opening formed on the first side of the case;

a guide groove formed at a location adjacent to the first side of the first face of the case; and

an identification bump formed on the first side of the case in a manner of being separated from the terminal opening.
The battery pack of claim 13, further comprising a mounting wall for fixing a position of the battery positioned at the inside of the case to make a charging terminal of the battery locate at the terminal opening.
The battery pack of claim 13, further comprising a fixed bump formed on the guide groove.