WO2021182814A1

WO2021182814A1 - Electronic device comprising pouch-type battery

Info

Publication number: WO2021182814A1
Application number: PCT/KR2021/002802
Authority: WO
Inventors: 김길호; 이연일
Original assignee: 삼성전자 주식회사
Priority date: 2020-03-10
Filing date: 2021-03-08
Publication date: 2021-09-16
Also published as: KR20210114592A

Abstract

An electronic device according to various embodiments of the present invention may comprise: a housing; and a battery disposed inside the housing. The battery may comprise: an electrode assembly having a first surface disposed to be oriented toward a first direction, a second surface disposed to be oriented toward a second direction opposite the first direction, and at least one lateral surface disposed to be oriented toward a third direction perpendicular to each of the first and second directions; and a pouch case surrounding the first surface, the second surface, and the lateral surface. The pouch case may comprise: a first pouch case surrounding the first surface and the lateral surface; a second pouch case disposed to overlap a portion of the first pouch case while surrounding the second surface and the lateral surface; and a sealing part formed by bonding each of both end portions of the first pouch case to the second pouch case. Various other embodiments are possible.

Description

Electronic Device Containing Pouch-Type Batteries

An embodiment of the present invention relates to a structure of a pouch-type battery for supplying power to an electronic device.

A pouch-type battery mounted inside to supply power to an electronic device is an aluminum pouch film (Al laminated film: Ny/Al/c-pp) folded in top/bottom to prevent leakage of electrolyte and infiltration of outside air. It may have a structure in which the upper/side surface is sealed by thermocompression bonding.

The sealed end of the pouch-type battery is exposed to an aluminum layer due to the cross-sectional structure of an aluminum laminated film, and when it comes into contact with metal outside the seating surface of the pouch-type battery, corrosion may occur. Therefore, the pouch-type battery has a structure in which insulation treatment is essential for the sealed portion, and there may be two types to insulate the sealing portion of the pouch-type battery.

The first type is Single Side Folding (SSF), in which the sealed part of the pouch-type battery is folded once and adhered to the side of the electrode assembly, and then an adhesive tape is attached to prevent exposure of the aluminum layer.

The second type is Double Side Folding (DSF), a structure in which the pouch-type sealed part is folded twice so that the exposed part of the aluminum layer is folded inward and not exposed.

However, the DSF (Double Side Folding) structure uses double-sided tape or glue after folding to fix the folded side part in close contact with the electrode assembly side, and as time passes, the fixed side part spreads, It may be larger than the designed width or the aluminum layer may be exposed.

In addition, the DSF structure may reduce the battery energy density because the side portion is folded twice when compared to the SSF (Single Side Folding) structure.

In the SSF (Single Side Folding) structure, a separate side tape is added, which may increase the cost of tape materials and man-hours.

In addition, in the structure of folding after sealing by changing the size of the exterior material (eg, pouch case) on both sides, the sealing position and the folding method increase the overall width of the battery, thereby increasing the volume of the pouch-type battery.

According to various embodiments of the present disclosure, there is provided an electronic device including a pouch-type battery capable of increasing battery energy density while maintaining the insulating effect of the folding structure of the pouch-type battery.

An electronic device according to various embodiments of the present disclosure includes a housing; and a battery disposed in the housing, wherein the battery has a first surface disposed to face a first direction, a second surface disposed to face a second direction opposite to the first direction, and the first and second surfaces an electrode assembly including at least one side surface disposed to face a third direction that is perpendicular to the direction; and a pouch case covering the first and second sides and the side, wherein the pouch case includes: a first pouch case surrounding the first side and the side; a second pouch case surrounding the second surface and the side surface, the second pouch case being disposed to overlap a portion of the first pouch case; And it may include a sealing portion formed by bonding both ends of the first pouch case to the second pouch case, respectively.

According to various embodiments of the present disclosure, it is possible to contribute in terms of battery energy density by reducing the battery mounting area increased due to the folding structure of the pouch case while maintaining the effect of the double-side folding structure.

Such a pouch-type battery mounting structure can increase the battery capacity in the same limited space of the electronic device, so it is effective to utilize the mounting space, and energy density can be increased as the thickness of the pouch case increases.

1 is a perspective view illustrating a front surface of a mobile electronic device according to an exemplary embodiment;

FIG. 2 is a perspective view illustrating a rear surface of the electronic device of FIG. 1 .

3 is an exploded perspective view illustrating an internal configuration of the electronic device of FIG. 1 .

4A is an exploded perspective view illustrating an internal structure of an electrode assembly according to an exemplary embodiment;

4B is a plan view illustrating an electrode assembly according to an exemplary embodiment.

5A is a plan view illustrating the pouch-type battery manufacturing process according to various embodiments of the present invention, before the pouch-type battery packaging material is cut.

5B is a perspective view illustrating a state in which a pouch case material according to various embodiments of the present invention is folded in half;

6A is a plan view illustrating a pouch-type battery according to various embodiments of the present disclosure;

6B is a cross-sectional view showing a pouch-type battery manufactured according to various embodiments of the present invention, and is a view taken along the line A-A' of FIG. 6 .

7A to 7C are cross-sectional views sequentially illustrating a process of forming a sealing structure and a side folding structure of a pouch-type battery according to various embodiments of the present invention, respectively, and only one side thereof is shown.

8 is a view showing a cross-section of a pouch case according to various embodiments of the present invention, and is a view taken along line B-B' of FIG. 7A.

9A is a side cross-sectional view illustrating another stack-type pouch-type battery according to various embodiments of the present disclosure;

9B is a side cross-sectional view illustrating another stack-type pouch-type battery according to various embodiments of the present disclosure;

10A and 10B are plan views each showing an atypical pouch battery according to various embodiments of the present invention.

Hereinafter, various embodiments of the present disclosure are described with reference to the accompanying drawings. However, this is not intended to limit the present disclosure to specific embodiments, and it should be understood to cover various modifications, equivalents, and/or alternatives of the embodiments of the present disclosure. In connection with the description of the drawings, like reference numerals may be used for like components.

The electronic device according to various embodiments of the present disclosure may include, for example, a smartphone, a tablet personal computer (PC), a mobile phone, a video phone, and an e-book reader (e-). book reader), desktop PC (desktop personal computer), laptop PC (laptop personal computer), netbook computer, workstation, server, PDA (personal digital assistant), PMP (portable multimedia player), MP3 Players, mobile medical devices, cameras, or wearable devices (e.g. smart glasses, head-mounted-devices (HMDs)), electronic garments, electronic bracelets, electronic necklaces, electronic apps accessory, electronic tattoo, smart mirror, or smart watch).

In some embodiments, the electronic device may be a smart home appliance. Smart home appliances, for example, televisions, digital video disk (DVD) players, audio, refrigerators, air conditioners, vacuum cleaners, ovens, microwave ovens, washing machines, air purifiers, set-top boxes (set-top box), home automation control panel (home automation control panel), security control panel (security control panel), TV box (eg Samsung HomeSync ^TM , Apple TV ^TM or Google TV ^TM , game console (eg Xbox ^TM , PlayStation ^TM ), electronic dictionary, It may include at least one of an electronic key, a camcorder, or an electronic picture frame.

In another embodiment, the electronic device may include various medical devices (eg, various portable medical measuring devices (eg, a blood glucose monitor, a heart rate monitor, a blood pressure monitor, or a body temperature monitor), magnetic resonance angiography (MRA), magnetic resonance imaging (MRI), CT (computed tomography), imager, or ultrasound machine, etc.), navigation device, global positioning system receiver, EDR (event data recorder), FDR (flight data recorder), automotive infotainment device, marine use Electronic equipment (e.g. navigation devices for ships, gyro compasses, etc.), avionics, security devices, head units for vehicles, industrial or domestic robots, automatic teller's machines (ATMs) in financial institutions, POS in stores (point of sales), or internet of things (e.g. light bulbs, sensors, electricity or gas meters, sprinkler devices, smoke alarms, thermostats, street lights, toasters, exercise equipment, It may include at least one of a hot water tank, a heater, a boiler, etc.).

According to some embodiments, the electronic device is a piece of furniture or part of a building/structure, an electronic board, an electronic signature receiving device, a projector, or various measuring devices (eg, water, electricity, gas, or a radio wave measuring device). In various embodiments, the electronic device may be a combination of one or more of the various devices described above. The electronic device according to an embodiment may be a flexible electronic device. In addition, the electronic device according to an embodiment of the present disclosure is not limited to the above-described devices, and may include a new electronic device according to technological development.

1 is a perspective view illustrating a front surface of a mobile electronic device according to an exemplary embodiment; FIG. 2 is a perspective view illustrating a rear surface of the electronic device of FIG. 1 .

1 and 2 , an electronic device 100 according to an exemplary embodiment includes a first side (or front side) 110A, a second side (or back side) 110B, and a first side 110A and The housing 110 may include a side surface 110C surrounding the space between the second surfaces 110B. In another embodiment (not shown), the housing may refer to a structure forming a part of the first surface 110A, the second surface 110B, and the side surface 110C of FIG. 1 . According to one embodiment, the first surface 110A may be formed by the front plate 102 (eg, a glass plate comprising various coating layers, or a polymer plate) at least a portion of which is substantially transparent. The second surface 110B may be formed by the substantially opaque back plate 111 . The back plate 111 is formed by, for example, coated or colored glass, ceramic, polymer, metal (eg, aluminum, stainless steel (STS), or magnesium), or a combination of at least two of the above materials. can be The side surface 110C is coupled to the front plate 102 and the rear plate 111 and may be formed by a side bezel structure (or "side member") 118 including a metal and/or a polymer. In some embodiments, the back plate 111 and the side bezel structure 118 are integrally formed and may include the same material (eg, a metal material such as aluminum).

In the illustrated embodiment, the front plate 102 has a first region 110D that extends seamlessly by bending from the first surface 110A toward the rear plate, including a long edge of the front plate. edge) can be included at both ends. In the illustrated embodiment (see FIG. 2 ), the rear plate 111 may include a second region 110E that extends seamlessly from the second surface 110B toward the front plate at both ends of the long edge. have. In some embodiments, the front plate or the back plate may include only one of the first region or the second region. In the above embodiments, when viewed from the side of the electronic device, the side bezel structure has a first thickness (or width) on the side side that does not include the first region or the second region, and the first The region or the side surface including the second region may have a second thickness that is thinner than the first thickness.

According to an embodiment, the electronic device 100 includes a display 101 , an

audio module

103 , 107 , 114 , a

sensor module

104 , 119 , a

camera module

105 , 112 , 113 , and a key input device ( It may include at least one of 115 , 116 , 117 , an indicator 106 , and

connector holes

108 and 109 . In some embodiments, the electronic device 100 may omit at least one of the components (eg, the

key input device

115 , 116 , 117 , or the indicator 106 ) or additionally include other components. have.

The display 101 may be exposed through a substantial portion of the front plate 102 , for example. In some embodiments, at least a portion of the display 101 may be exposed through the front plate 102 forming the first area 110D of the first surface 110A and the side surface 110C. The display 101 may be disposed adjacent to or coupled to a touch sensing circuit, a pressure sensor capable of measuring the intensity (pressure) of a touch, and/or a digitizer that detects a magnetic field type stylus pen. In some embodiments, at least a portion of the

sensor module

104 , 119 , and/or at least a portion of a

key input device

115 , 116 , 117 comprises the first region 110D, and/or the second region may be disposed at 110E.

The

audio modules

103 , 107 , and 114 may include a microphone hole 103 and

speaker holes

107 and 114 . In the microphone hole 103, a microphone for acquiring an external sound may be disposed therein, and in some embodiments, a plurality of microphones may be disposed to detect the direction of the sound. The speaker holes 107 and 114 may include an external speaker hole 107 and a receiver hole 114 for a call. In some embodiments, the speaker holes 107 and 114 and the microphone hole 103 may be implemented as one hole, or a speaker may be included without the speaker holes 107 and 114 (eg, a piezo speaker).

The

sensor modules

104 and 119 may generate electrical signals or data values corresponding to an internal operating state of the electronic device 100 or an external environmental state. The

sensor modules

104 and 119 are, for example, a first sensor module 104 (eg, a proximity sensor) and/or a second sensor module (not shown) disposed on the first surface 110A of the housing 110 . ) (eg, a fingerprint sensor), and/or a third sensor module 119 (eg, an HRM sensor) disposed on the second surface 110B of the housing 110 . The fingerprint sensor may be disposed on the second surface 110B as well as the first surface 110A (eg, the home key button 115) of the housing 110 . The electronic device 100 includes a sensor module not shown, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, At least one of a humidity sensor and an illuminance sensor 104 may be further included.

The

camera modules

105 , 112 , and 113 include a first camera device 105 disposed on the first surface 110A of the electronic device 100 , and a second camera device 112 disposed on the second surface 110B of the electronic device 100 . ), and/or a flash 113 . The

camera modules

105 and 112 may include one or more lenses, an image sensor, and/or an image signal processor. The flash 113 may include, for example, a light emitting diode or a xenon lamp. In some embodiments, two or more lenses (wide-angle and telephoto lenses) and image sensors may be disposed on one side of the electronic device 100 .

The

key input devices

115 , 116 , 117 include a home key button 115 disposed on the first surface 110A of the housing 110 , a touch pad 116 disposed around the home key button 115 , and / or a side key button 117 disposed on the side surface 110C of the housing 110 may be included. In another embodiment, the electronic device 100 may not include some or all of the above-mentioned

key input devices

115 , 116 , 117 and the non-included

key input devices

115 , 116 , 117 display a display. It may be implemented in another form, such as a soft key on the 101 .

The indicator 106 may be disposed, for example, on the first side 110A of the housing 110 . The indicator 106 may provide status information of the electronic device 100 in the form of light, for example, and may include an LED.

The connector holes 108 and 109 include a first connector hole 108 capable of receiving a connector (eg, a USB connector) for transmitting and receiving power and/or data to and from an external electronic device, and/or an external electronic device. and a second connector hole (or earphone jack) 109 capable of accommodating a connector for transmitting and receiving audio signals.

Referring to FIG. 3 , the electronic device 300 includes a side bezel structure 310 , a first support member 311 (eg, a bracket), a front plate 320 , a display 330 , and a printed circuit board 340 . , a battery 350 , a second support member 360 (eg, a rear case), an antenna 370 , and a rear plate 380 . In some embodiments, the electronic device 300 may omit at least one of the components (eg, the first support member 311 or the second support member 360 ) or additionally include other components. . At least one of the components of the electronic device 300 may be the same as or similar to at least one of the components of the electronic device 100 of FIG. 1 or FIG. 2 , and overlapping descriptions will be omitted below.

The first support member 311 may be disposed inside the electronic device 300 and connected to the side bezel structure 310 , or may be integrally formed with the side bezel structure 310 . The first support member 311 may be formed of, for example, a metal material and/or a non-metal (eg, polymer) material. The first support member 311 may have a display 330 coupled to one surface and a printed circuit board 340 coupled to the other surface. The printed circuit board 340 may be equipped with a processor, memory, and/or an interface. The processor may include, for example, one or more of a central processing unit, an application processor, a graphics processing unit, an image signal processor, a sensor hub processor, or a communication processor.

Memory may include, for example, volatile memory or non-volatile memory.

The interface may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, and/or an audio interface. The interface may, for example, electrically or physically connect the electronic device 300 to an external electronic device, and may include a USB connector, an SD card/MMC connector, or an audio connector.

The battery 350 is a device for supplying power to at least one component of the electronic device 300 and may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. . At least a portion of the battery 350 may, for example, be disposed on a substantially same plane as the printed circuit board 340 . The battery 350 may be integrally disposed inside the electronic device 100 , or may be disposed detachably from the electronic device 100 .

The antenna 370 may be disposed between the rear plate 380 and the battery 350 . The antenna 370 may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna. The antenna 370 may, for example, perform short-range communication with an external device or wirelessly transmit/receive power required for charging. In another embodiment, the antenna structure may be formed by a part of the side bezel structure 310 and/or the first support member 311 or a combination thereof.

4A and 4B , the battery 250 according to an embodiment is an electrode assembly 50 including a pouch case 210 and a battery cell 220 , a positive electrode tab 231 or a negative electrode tab 232 . may include.

According to one embodiment, the pouch case 210 (or can) is a structure for providing an internal space 213 in which the battery cell 220 is accommodated, for example, the internal space 213 . It may include a first pouch case 211 and a second pouch case 212 disposed to be spaced apart from each other with the interposed therebetween. According to one embodiment, the pouch case 210 may be formed of a metal such as aluminum or an aluminum alloy.

According to one embodiment, the battery cell 220 is prepared by winding the positive electrode substrate (or positive electrode plate) 221 , the negative electrode substrate (or negative electrode plate) 222 , and the separator 223 to overlap and roll together. As the structure, for example, it may have a jelly-roll shape. According to an embodiment, after disposing the battery cell 220 in the inner space 213 of the pouch 210 , by a series of processes of injecting and sealing an electrolyte, the battery cell 220 is formed in the pouch 210 . ) may be disposed with the electrolyte in the inner space 213 .

Referring to FIG. 5A , a pouch case 40 may be prepared to seal the electrode assembly according to an exemplary embodiment. For example, the pouch case 40 may be a case including an aluminum layer.

According to one embodiment, the pouch case 43 before folding and sealing may be manufactured by cutting the pouch casing 40 along a solid line. According to one embodiment, the pouch case 43 is generally folded in half along the folding line f, and may be divided into first and

second pouch cases

41 and 42 .

According to one embodiment, the horizontal length l1 of the first pouch case 41 is smaller than the horizontal length l2 of the second pouch case 42, and the vertical length l3 of the first pouch case 41 and The vertical length l3 of the second pouch case 42 may be manufactured to be the same. According to one embodiment, the edge portion generated by the difference between the horizontal length l1 of the first pouch case 41 and the horizontal length l2 of the second pouch case 42 may be a folded portion.

Referring to FIG. 5B , when the pouch case 43 according to an exemplary embodiment is approximately folded in half along the folding line f, the pouch case 43 may be disposed to overlap each other. The folded state of the pouch case 43 may protect one surface and the other surface of the electrode assembly 50 .

According to one embodiment, the pouch case 43 may have a sealing structure and a folding structure in order to seal both sides of the electrode assembly 50 in a wrapped state. According to one embodiment, the first surface of the pouch case 43 may have first folding parts formed on both edges 410 , and the second surface of the pouch case 43 is second folded on both edges 420 . An addition may be formed, and a third folding part 423 may be positioned between the first and second folding parts in the second pouch case 42 .

6A is a plan view illustrating a pouch-type battery according to various embodiments of the present disclosure; 6B is a cross-sectional view showing a pouch-type battery manufactured according to various embodiments of the present invention, and is a view taken along the line A-A' of FIG. 6A.

7A to 7C are side cross-sectional views sequentially illustrating a process of forming a sealing structure and a side folding structure of a pouch-type battery including a jelly roll type electrode assembly according to various embodiments of the present disclosure;

According to one embodiment, the jelly roll type electrode assembly 50 includes a battery cell (eg, battery cell 220 illustrated in FIG. 4A ), a positive electrode (or a positive electrode plate) (eg, positive electrode 221 illustrated in FIG. 4A ). ), a negative electrode (or negative electrode plate) (eg, the negative electrode 222 illustrated in FIG. 4A ) and a separator (eg, the separator 223 illustrated in FIG. 4B ) may be overlapped and wound together.

According to one embodiment, the electrode assembly 50 may include first and second surfaces and at least one side surface. According to one embodiment, the electrode assembly 10 includes a first surface disposed to face a first direction, a second surface disposed to face a second direction opposite to the first direction, and the first and second directions; It may be a structure including at least one or more side surfaces that are respectively disposed to face in a third direction facing vertically. In the electrode assembly 50 , a portion other than a portion of the positive electrode tab and the negative electrode tab may be sealed by the pouch case 43 .

7A to 7C , a process of forming the sealing structure and the folding structure of the pouch case 43 according to various embodiments of the present invention will be described as follows. Through the sealing and folding processes shown in FIGS. 7A to 7C , the pouch-type battery 400 including the side folding structure of the pouch case 43 as shown in FIG. 6 may be completed. The completed pouch-type battery 400 may be disposed in a housing (eg, the housing 110 shown in FIG. 1 ) of the electronic device.

According to one embodiment, the side folding structure of the pouch case 43 is a folding structure of the first and

second pouch cases

41 and 42 positioned on both sides 514 of the electrode assembly 50, respectively, and the electrode assembly ( By arranging the first and second

folding parts

411 and 421 in each corner region of both sides 514 when the both side surfaces 514 of 50 are doubled, and when the electrode assembly 50 is viewed in cross section, Battery mounting space can be secured.

According to an embodiment, the electrode assembly 50 may be divided into a stacked type or a winding type or a Jelly-roll type. FIG. 7A is a cross-section of one side of the winding type electrode assembly 50 . . According to one embodiment, the electrode assembly 50 may include first and

second surfaces

510 and 512 and both side surfaces 514 . For example, the first and

second surfaces

510 and 512 may have a generally flat cross-section, and each of both side surfaces 514 may have a curved, round shape. For example, the cross-section of both side surfaces 514 may be generally semi-circular in shape.

According to one embodiment, in the pouch-type battery 400, first and second spaces S1 and S2 may be provided between the vertical side surface 516 and the corners of both side surfaces 514, and the first and second spaces ( Since the first folding part 411 and the second folding part 421 can be arranged in S1 and S2, the battery mounting space can be efficiently used.

According to one embodiment, the first pouch case 41 may be disposed to surround the first surface 510 and both side surfaces 514 of the electrode assembly 50 . The first pouch case 41 may face the first surface 510 and both side surfaces 514 of the electrode assembly 50 one-to-one. According to one embodiment, the second pouch case 42 may be disposed to surround the second surface 512 and both side surfaces 514 of the electrode assembly 50 . The second pouch case 42 may face a part of the first pouch case 41 surrounding the second surface 512 and both side surfaces 514 of the electrode assembly 50 one-to-one.

According to one embodiment, the first pouch case 41 surrounds the first side 510 and both side surfaces 514 of the electrode assembly 50, and both ends (eg, both edges shown in FIG. 5B ) 410)) may be respectively bonded to the second pouch case 42 to form the sealing portion 45. For example, the sealing part 45 may be formed by a heat treatment process. According to one embodiment, the sealing portion 45 is a portion of the second pouch case 42 by a heat treatment process at both ends (eg, both edges 410 shown in FIG. 5B) of the first pouch case 41. can be attached to According to one embodiment, both ends (eg, both edges 410 shown in FIG. 5B ) of the first pouch case 41 may be folded for a sealing process to form a first folding part 411 . .

According to one embodiment, the sealing part 45 may extend along both side surfaces 514 of the electrode assembly 50 , respectively. For example, the sealing part 45 may extend in a straight line. According to an exemplary embodiment, when the electrode assembly 50 is vertically cut, the sealing part 45 may be located close to a portion at one corner of both sides 514 of the electrode assembly 50 . According to one embodiment, in the pouch case 43 , both side surfaces 514 of the electrode assembly 50 may be sealed by the sealing part 45 , respectively.

Referring to FIG. 7B , according to one embodiment, the second pouch case 42 may form a second folding part 421 by folding both ends (eg, both edges 420 shown in FIG. 5B ), respectively. have. According to one embodiment, the second pouch case 42 includes an aluminum material layer, and the aluminum material layer may be exposed on the end surfaces 4210 located at both ends of the second pouch case 42 . The second folding part 421 may be formed in order to prevent the aluminum material layer exposed in the cross-section 4210 from being exposed to the outside of the pouch-type battery. According to one embodiment, the second folding unit 421 may prevent the end surfaces 4210 located at both ends of the second pouch case 42 from being exposed to the outside when the pouch case 43 is folded.

According to one embodiment, the second folding part 421 may be formed by folding both ends of the second pouch case 42 inward by approximately 180 degrees and then fixing the folded state.

Referring to FIG. 7C , according to an exemplary embodiment, the second pouch case 42 in which the second folding part 421 is formed is folded and a third folding part 423 surrounding both sides 514 of the electrode assembly 50 . ) can be formed. According to one embodiment, the third folding part 423 may additionally wrap both sides 514 of the electrode assembly 50 wrapped by the first pouch case 41 . According to an embodiment, both side surfaces 514 of the electrode assembly 50 may overlap a portion of the first pouch case 41 and the third folding unit 423 of the second pouch case 42 . According to one embodiment, when viewed from the side direction of the electrode assembly 50, the thickness of the pouch case protecting both sides 514 of the electrode assembly 50 is double, so the battery mounting space on both sides of the pouch-type battery can improve the efficiency of

According to one embodiment, the second pouch case 42 may be arranged so that at least a portion of the second folding unit 421 is folded by approximately 90 degrees so that at least a portion thereof is in contact with a portion of the first pouch case 41 . According to one embodiment, the second folding part 421 may be disposed in the first space S1 in the upper edge region of a portion of the first pouch case 41 surrounding both sides 514 . For example, the upper side of both side surfaces 514 of the electrode assembly may have a round shape having a curvature, and a first space S1 for accommodating the second folding part 421 may be provided.

According to an embodiment, the first folding part 411 and the second folding part 421 may face each other up and down, and the sealing part 45 and the second folding part 421 may face each other up and down.

According to an embodiment, the first folding part 411 extends along both edges of the first pouch case 41 (eg, both edges 410 shown in FIG. 5A ), respectively, and the second folding part 421 ) respectively extend along both edges of the second pouch case 42 (eg, both edges 420 shown in FIG. 5A ), and the third folding part 423 is parallel to the first folding part 411 ). may extend in each direction. For example, each of the first to third

folding parts

411 , 421 , and 423 may be spaced apart from each other and may be parallel to each other. Reference numeral 231 denotes a positive electrode tab, and 232 denotes a negative electrode tab.

According to one embodiment, at least a portion of the second folding unit 421 folded through the above process may be finally attached to both edges of the first pouch case 41 using an adhesive. For example, the adhesive may include a double-sided tape. Reference numeral 422 may be an adhesive part.

8 is a cross-sectional view showing the structure of a pouch case according to various embodiments of the present invention, and is a view taken along line B-B' of FIG. 7A.

Referring to FIG. 8 , the pouch case 43 according to an embodiment may include a metal layer 432 and at least one

non-metal layer

431 and 433 . For example, the metal layer 432 may be protected by the

non-metal layers

431 and 433 as an aluminum deposition layer. The

non-metal layers

431 and 433 are insulating layers, and may include a nylon material layer 431 and a cast polypropylene layer 433 (cast polypropylene). According to an embodiment, a nylon material layer 431 may be adhered to one surface of the metal layer 432 , and a cast polypropylene layer 433 (cast polypropylene) may be adhered to the other surface thereof. According to one embodiment, an adhesive layer may be formed between the nylon material layer 431 and the metal layer 432 , and an adhesive layer may be formed between the cast polypropylene layer 433 and the metal layer 432 . According to one embodiment, the nylon material layer 431 may face outward, and the cast polypropylene layer 433 may be positioned toward the electrode assembly.

According to one embodiment, the thickness of the metal layer 432 , the nylon material layer 431 , and the cast polypropylene layer 433 may be different from each other. For example, the metal layer 432 is the thickest, and then the cast polypropylene layer 433 may be thicker than the nylon material layer 431 .

9A is a cross-sectional view of a pouch-type battery including another stacked electrode assembly according to various embodiments of the present disclosure, and may be a cross-sectional view taken along line A-A' of FIG. 6A .

Referring to FIG. 9A , in the pouch-type battery 600 according to an embodiment, the electrode assembly 70 may be stacked. According to one embodiment, the stack type electrode assembly 70 includes a positive electrode plate (eg, the positive electrode plate 221 illustrated in FIG. 4A ), a negative electrode plate (eg, the negative electrode plate 222 illustrated in FIG. 4A ), and isolates between the positive and negative plates. A structure in which a battery cell 701 including a separator (eg, the separator 223 shown in FIG. 4A ) is repeatedly stacked vertically can be a structure. The electrode assembly 70 stacked in this type may be sealed by an exterior material, for example, the pouch case 43 .

According to one embodiment, the pouch-type battery 600 has a different structure than the pouch-type battery 400 shown in FIG. 6 , only the electrode assembly, and the remaining structures are the same, so detailed descriptions of the same structure are duplicated. It will be omitted to avoid description.

According to one embodiment, in the electrode assembly 70 , the

individual battery cells

701 , 702 , and 703 may be disposed in a top-down stacking type. According to one embodiment, the

individual battery cells

701 , 702 , and 703 may be formed to have substantially the same shape as each other, for example, to have the same horizontal and vertical lengths. For example, the battery cell 701 located above the electrode assembly 70, the battery cell 702 located at the bottom, and the battery cell 703 located in the middle between the upper and lower portions of the electrode assembly 70 may have substantially the same horizontal and vertical length. can

9B is a cross-sectional view of another stacked pouch type battery according to various embodiments of the present disclosure, and may be a view taken along line A-A' of FIG. 6A .

Referring to FIG. 9B , in the pouch-type battery 610 according to an embodiment, the electrode assembly 71 may be a stack type. The stack type electrode assembly 71 includes a positive electrode plate (eg, the positive electrode plate 221 illustrated in FIG. 4A ), a negative electrode plate (eg, the negative electrode plate 222 illustrated in FIG. 4A ), and a separator separating the positive electrode plate and the negative electrode plate (eg, FIG. 4A ). As a structure including the separator 223 shown in FIG. 1 , a positive electrode plate, a separator, a negative electrode plate, and a separator may be repeatedly stacked in the vertical direction. The electrode assembly 71 stacked in this type may be sealed by an exterior material, for example, the pouch case 43 (eg, the pouch case 43 shown in FIG. 6 ).

According to one embodiment, the pouch-type battery 610 has a different structure than the pouch-type battery 400 illustrated in FIG. 6 , only the electrode assembly, and the remaining structures are the same, so detailed descriptions of the same structure are duplicated. It will be omitted to avoid description.

According to an embodiment, in the electrode assembly 71 , individual battery cells 701 may be disposed in a top-down stacking type. According to an embodiment, the individual battery cells 701 may have different shapes, for example, a rectangular shape when viewed from the top of the battery. The electrode assembly 71 stacked in this type may be sealed by an exterior material, for example, the pouch case 43 (eg, the pouch case 43 shown in FIG. 6 ).

According to an embodiment, in the electrode assembly 71 , the size of the battery cells 712 disposed in the middle between the upper and lower portions may be relatively larger than the

battery cells

711 and 713 disposed at the upper and lower portions. For example, the battery cells 711-713 of the electrode assembly may be stacked in such a way that the size of the battery cells gradually increases from the upper part to the middle part, and the size of the battery cells gradually decreases from the middle part to the lower part.

10A is a plan view illustrating an atypical pouch-type battery according to various embodiments of the present disclosure;

Referring to FIG. 10A , according to one embodiment, the amorphous pouch-type battery 620 of various shapes may be manufactured according to the shape of various pouch exterior materials, and the battery body 622 is shown in FIGS. 7A to 7C along the side of the battery body 622 . A side folding structure may be applied.

According to one embodiment, in the pouch-type battery 620 , the battery body 622 may be symmetrical and vertically asymmetrical.

According to one embodiment, in the atypical pouch-type battery 620, the number of sides to which the side folding structure is applied may vary, and since the number of sides to which the side folding structure is applied increases, a greater energy density increase effect can be expected. have. Reference numeral 621 denotes a (+) electrode tab, and 623 denotes a (-) electrode tab.

10B is a plan view illustrating an atypical pouch-type battery according to various embodiments of the present disclosure.

Referring to FIG. 10B , according to one embodiment, the amorphous pouch-type battery 630 of various shapes may be manufactured according to the shape of various pouch exterior materials, and the battery body 632 is shown in FIGS. 7A to 7C along the side of the battery body 632 . A side folding structure may be applied.

According to one embodiment, in the pouch-type battery 630 , the battery body 632 may have a vertical and/or left-right asymmetric shape.

According to one embodiment, the number of sides to which the side folding structure is applied may vary in the atypical pouch-type battery 630, and since the number of sides to which the side folding structure is applied increases, a greater energy density increase effect can be expected. have. Reference numeral 631 denotes a (+) electrode tab, and 633 denotes a (-) electrode tab.

The various embodiments of the present disclosure disclosed in the present specification and drawings are merely specific examples to easily explain the technical content of the present disclosure and help the understanding of the present disclosure, and are not intended to limit the scope of the present disclosure. Therefore, the scope of the present disclosure should be construed as including all changes or modifications derived from the technical spirit of the present disclosure in addition to the embodiments disclosed herein as being included in the scope of the present disclosure.

Claims

In an electronic device,

housing; and

a battery disposed within the housing;

the battery is

At least a first surface disposed to face the first direction, a second surface disposed to face a second direction opposite to the first direction, and a third direction perpendicular to the first and second directions, respectively an electrode assembly including one or more sides; and

and a pouch case surrounding the first surface, the second surface and the side surface,

The pouch case

a first pouch case surrounding the first side and the side;

a second pouch case surrounding the second surface and the side surface, the second pouch case being disposed to overlap a portion of the first pouch case; and

and a sealing part formed by bonding both ends of the first pouch case to the second pouch case, respectively.
The electronic device of claim 1 , wherein the sealing part is disposed adjacent to a corner region at lower ends of both sides of the electrode assembly.
The electronic device of claim 2 , wherein the sealing part is manufactured by a heat treatment method.
The electronic device of claim 1, wherein first folding parts are formed at both ends of the first pouch case, respectively.
The electronic device of claim 4 , wherein the first folding part includes the sealing part.
5 . The electronic device of claim 4 , wherein the first folding part is disposed adjacent to a corner region at lower ends of both sides of the electrode assembly.
The electronic device of claim 4 , wherein second folding parts are formed at both ends of the second pouch case.
The electronic device of claim 7 , wherein the second folding part is disposed in contact with the second pouch case, and disposed adjacent to upper corners of both sides of the electrode assembly.
8. The method of claim 7, wherein each of the second folding parts are folded in a direction facing each other, are folded in the electrode assembly direction and attached to a part of the first pouch case, and are positioned so that the cross section is not exposed to the outside of the pouch-type battery electronic device.
The electronic device of claim 7 , wherein the second pouch case includes a third folding unit that surrounds a portion of the first pouch case located on both sides of the electrode assembly.
The electronic device of claim 10 , wherein the first folding part is disposed between the electrode assembly and the third folding part.
According to claim 1, wherein the pouch case

aluminum layer;

a nylon layer attached to one surface of the aluminum layer; and

It includes a cast polypropylene layer attached to the other surface of the aluminum layer,

The electronic device in which the nylon layer faces outside the pouch case, and the cast polypropylene layer faces toward the electrode assembly.
The electronic device of claim 10 , wherein the first and second folding parts are folded by approximately 180 degrees, and the third folding parts are folded by approximately 90 degrees.
The electronic device of claim 7 , wherein the sealing part faces the second folding part.
The electronic device of claim 1 , wherein the electrode assembly is either a winding type or a stack type.