WO2022050617A1 - Battery and electronic device including battery - Google Patents

Abstract

A battery according to various embodiments disclosed herein may comprise: a case; a first electrode assembly which is disposed in the case and includes at least one first positive electrode, at least one first negative electrode, and at least one first separator disposed between the at least one first positive electrode and the at least one first negative electrode; and a second electrode assembly which is disposed in the case, surrounds the first electrode assembly, and is wound in a roll, the second electrode including a second positive electrode, a second negative electrode, a second separator disposed between the second positive electrode and the second negative electrode, and a third separator disposed on the second positive electrode or the second negative electrode.

Description

Batteries and Electronic Devices Containing Batteries

Various embodiments of the present disclosure relate to a battery and an electronic device including the battery.

Due to the development of information and communication technology and semiconductor technology, the distribution and use of various electronic devices is rapidly increasing. In particular, recent electronic devices are being developed to be portable and to be able to communicate. In addition, electronic devices may output stored information as sound or image. As the degree of integration of electronic devices increases and high-speed and large-capacity wireless communication becomes common, various functions may be mounted in one electronic device such as a mobile communication terminal in recent years. For example, multimedia functions such as music/video reproduction as well as communication functions are being integrated into one electronic device. Such electronic devices are being miniaturized so that users can conveniently carry them.

As the use of electronic devices becomes daily, user demands for portability and usability of electronic devices may increase. According to such user demands, for example, wearable electronic devices that can be carried and used while worn on the body, such as wireless earphones, smart watches, and glasses-type electronic devices, are being commercialized, and charged with power of the electronic device, etc.; Secondary batteries capable of discharging are being used.

A lithium ion battery used as a secondary battery consists of a combination of unit cells including a positive electrode, a negative electrode, and a separator, and according to the specifications required for an electronic device, the unit cell is wound in a roll form or A secondary battery in which a plurality of unit cells are stacked may be used.

Since the lithium ion battery converts chemical energy into electrical energy using the redox reaction between the positive electrode and the negative electrode, the size of the unit cell in the lithium ion battery may be proportional to the capacity of the battery. However, in order to reduce the size and weight of the electronic device, there is a limitation in increasing the size of the battery.

In addition, in a cylindrical or coin-shaped battery, an empty space for insertion of a mandrel device for winding a unit cell may exist inside the battery, and due to the empty space, the capacity of the battery may be small compared to the volume of the battery .

According to various embodiments of the present disclosure, it is possible to provide a battery with an increased battery capacity by reducing an empty space formed inside the battery.

However, the problems to be solved in the present disclosure are not limited to the above-mentioned problems, and may be variously expanded without departing from the spirit and scope of the present disclosure.

According to various embodiments of the present disclosure, a battery is disposed in a case, the case, at least one first positive electrode, at least one first negative electrode, and the at least one first positive electrode and the at least one first negative electrode A first electrode assembly including at least one first separator disposed therebetween and a second electrode assembly disposed in the case and having a rolled roll shape surrounding the first electrode assembly, a second anode and a second cathode , a second electrode assembly including a second separator disposed between the second anode and the second cathode, and a third separator disposed on the second anode or the second cathode.

According to various embodiments of the present disclosure, an electronic device includes a housing and a battery disposed in the housing, wherein the battery includes a case, disposed in the case, at least one first positive electrode, and at least one first A first electrode assembly including a negative electrode, and at least one first separator disposed between the at least one first positive electrode and the at least one first negative electrode, and disposed in the case and surrounding the first electrode assembly A second electrode assembly having a wound roll shape, a second positive electrode, a second negative electrode, a second separator disposed between the second positive electrode and the second negative electrode, and disposed on the second positive electrode or the second negative electrode A second electrode assembly including a third separator may be included.

In the battery according to various embodiments of the present disclosure, the battery capacity may be increased while maintaining the volume of the battery by using the first electrode assembly accommodated in the second electrode assembly.

1A and 1B are perspective views of an electronic device, according to various embodiments of the present disclosure;

2 is a perspective view of a battery, in accordance with various embodiments of the present disclosure;

3 is a cross-sectional view of a battery, in accordance with various embodiments of the present disclosure;

4 is a cross-sectional view of a first electrode assembly according to various embodiments of the present disclosure;

5 is a cross-sectional view of a second electrode assembly according to various embodiments of the present disclosure;

6 is a cross-sectional view taken along line A-A` of FIG. 2 .

7A is a cross-sectional view taken along line B-B′ of FIG. 2 according to an embodiment of the present disclosure, and FIG. 7B is a cross-sectional view taken along line B-B′ of FIG. 2 according to another embodiment of the present disclosure.

8 is a schematic diagram of a first electrode assembly disposed in a central region, according to an embodiment of the present disclosure;

9 is a schematic diagram of a first electrode assembly disposed in a central region, according to another embodiment of the present disclosure;

The electronic device according to various embodiments disclosed in this document may have various types of devices. The electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device. The electronic device according to the embodiment of the present document is not limited to the above-described devices.

The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, but it should be understood to include various modifications, equivalents, or substitutions of the embodiments. In connection with the description of the drawings, like reference numerals may be used for similar or related components. The singular form of the noun corresponding to the item may include one or more of the item, unless the relevant context clearly dictates otherwise. As used herein, "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "A , B, or C" each may include any one of the items listed together in the corresponding one of the phrases, or all possible combinations thereof. Terms such as "first", "second", or "first" or "second" may be used simply to distinguish an element from other elements in question, and may refer elements to other aspects (e.g., importance or order) is not limited. It is said that one (eg, first) component is "coupled" or "connected" to another (eg, second) component, with or without the terms "functionally" or "communicatively". When referenced, it means that one component can be connected to the other component directly (eg by wire), wirelessly, or through a third component.

The term “module” used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and is interchangeable with terms such as, for example, logic, logic block, component, or circuit. can be used as A module may be an integrally formed part or a minimum unit or a part of the part that performs one or more functions. For example, according to an embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

According to various embodiments, each component (eg, module or program) of the above-described components may include a singular or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. there is. According to various embodiments, one or more components or operations among the above-described corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg, a module or a program) may be integrated into one component. In this case, the integrated component may perform one or more functions of each component of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. . According to various embodiments, operations performed by a module, program, or other component are executed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations are executed in a different order, or omitted. or one or more other operations may be added.

1A is a perspective view of an electronic device according to various embodiments of the present disclosure; 1B is a perspective view of an electronic device viewed from another direction according to various embodiments of the present disclosure;

1A and 1B , the electronic device 100 may include a housing 101 and a component (eg, the battery 200 of FIG. 2 ) accommodated in the inner space of the housing 101 . According to an embodiment, the housing 101 includes a first housing 101a and a second housing 101b, and the housing 101 includes various types of housing 101 positioned between the first housing 101a and the second housing 101b. It may include spaces that house structures and/or electrical components.

According to various embodiments, the first housing 101a and/or the second housing 101b may be formed by ceramic, polymer, metal, or a combination of at least two of the above materials, and may be formed on an outer surface or an inner surface. at least one coating layer formed thereon.

According to various embodiments, the electronic device 100 guides an external sound (eg, a user's voice or a sound of the surrounding environment) to a component (eg, a microphone) of the electronic device 100 or A plurality of acoustic holes 111a, 111b, 111c configured to provide a path for radiating sound output from a component (eg, a speaker) to the outside of the electronic device 100, an external sound (eg, a user a dummy hole 111d, a sound hole 111a, configured to guide the voice of the voice or the sound of the surrounding environment) to a component (eg, a microphone) of the electronic device 100 or to adjust the pressure inside the ear canal to correspond to the pressure of the external environment; 111b and 111c) extend to the inside of the second housing 101b from at least one (eg, the sound hole 111b) to transmit an external sound (eg, a user's voice or a sound of the surrounding environment) of the electronic device 100 . An acoustic dimple 113 for guiding a component (eg, a microphone), a plurality of electrodes 141a for receiving charging power, and adjusting the pressure inside the ear canal to correspond to the pressure of the external environment or a vent hole 115 for inducing or emitting heat inside the housing 101 of the electronic device 100 to the outside, and/or a sensor for detecting whether the electronic device 100 is worn on the user's body It may include a disposed optical window 119 .

According to various embodiments, in a state in which the electronic device 100 is worn on the user's body, the first housing 101a is disposed to substantially face the user's body so that the outer surface CS is in contact with the user's body, The second housing 101b may face the external space. According to an embodiment, a part of the outer surface ES of the second housing 101b is visually exposed to the external space according to the shape of the user's body (eg, ears) or the state in which the electronic device 100 is worn. , other parts may be concealed by the user's body. According to an embodiment, a portion of the outer surface ES of the second housing 101b that is concealed by the user's body may contact the user's body.

2 is a perspective view of a battery, in accordance with various embodiments of the present disclosure; 3 is a cross-sectional view of a battery, in accordance with various embodiments of the present disclosure;

According to various embodiments, the battery 200 may supply power to at least one component of the electronic device (eg, the electronic device 100 of FIG. 1 ). According to an embodiment, the battery 200 may be a rechargeable secondary battery.

According to various embodiments, the battery 200 may be formed in various shapes. According to an embodiment, the battery 200 may be a small battery to be disposed in a miniaturized wearable electronic device (eg, the electronic device 100 of FIG. 1A ). For example, the battery 200 may be a coin or a cylinder ( cylinder) shape of the battery.

According to various embodiments, the battery 200 may include a plurality of electrode assemblies 300 and 400 . According to an embodiment, the battery 200 includes an inner electrode assembly (eg, the first electrode assembly 300 ) and an outer electrode assembly (eg, the second electrode assembly 400 ) surrounding the first electrode assembly 300 ). may include For example, the second electrode assembly 400 may surround the side surface (eg, the Y-axis direction) of the first electrode assembly 300 . According to an embodiment, the first electrode assembly 300 may be a unit cell (eg, the unit cell 310 of FIG. 4 ) itself or a combination of the unit cells 310 to be described later, and the second electrode assembly 400 . ) may be a unit cell (eg, the unit cell 410 of FIG. 5 ) itself, which will be described later.

4 is a cross-sectional view of a first electrode assembly according to various embodiments of the present disclosure;

Referring to FIG. 4 , the first electrode assembly 300 may include at least one unit cell 310 . The unit cell 310 is disposed between at least one first positive electrode 312 , at least one first negative electrode 314 , at least one first positive electrode 312 and at least one first negative electrode 314 . At least one first separator 316 may be included.

According to various embodiments, the first anode 312 may include a first substrate 312a and a first mixture 312b surrounding the first substrate 312a. For example, the first substrate 312a may be disposed between a pair of first mixtures 312b. According to an embodiment, the first substrate 312a may include aluminum (Al). According to an embodiment, the first mixture 312b includes lithium (Li) oxide including a transition metal (eg, at least one of cobalt (Co), manganese (Mn), or iron (Fe)). can do.

According to various embodiments, the first negative electrode 314 may include a second substrate 314a and a second mixture 314b surrounding the second substrate 314a. For example, the second substrate 314a may be disposed between a pair of second mixtures 314b. According to an embodiment, the second substrate 314a may include copper (Cu). According to an embodiment, the second mixture 314b may include graphite and/or lithium (Li) titanium (Ti) oxide.

According to various embodiments, the first separator 316 physically separates the first positive electrode 312 and the first negative electrode 314 , and a pore capable of moving a designated material (eg, lithium (Li) ions). (pore) may be a non-conductive porous body. According to an embodiment, the first separator 316 may be a synthetic resin (eg, polyethylene or polypropylene). According to an embodiment, one unit cell 310 may include two first separators 316 .

According to various embodiments, the unit cell 310 may include a first separator 316 and a fourth separator 318 spaced apart from each other. The fourth separator 318 may be disposed on the first anode 312 or the second cathode 314 . According to an embodiment, the positions of the first anode 312 and the first cathode 314 may be changed. For example, in FIG. 4 , the unit cell 310 is arranged in the order of the fourth separator 318 , the first anode 312 , the first separator 316 , the first cathode 314 , and the fourth separator 318 . and/or a fourth separator 418 , a first cathode 314 , a first separator 316 , and a first anode 312 , which may include unit cells 310 arranged in this order.

According to various embodiments, the first electrode assembly 300 may include a first positive electrode tab 320 and a first negative electrode tab 330 . According to an embodiment, the first positive electrode tab 320 may be electrically connected to the first positive electrode 312 , and the first negative electrode tab 330 may be electrically connected to the first negative electrode 314 . For example, the first positive electrode tab 320 may be connected to the first substrate 312a, and the first negative electrode tab 330 may be connected to the second substrate 314a. According to an embodiment, when the first electrode assembly 300 includes a plurality of stacked unit cells 310 , the first positive electrode tab 320 and the first negative electrode tab 330 are each of the plurality of unit cells. It may be electrically connected to the 310 . For example, the first positive electrode tab 320 may be connected to the plurality of first substrates 312a , and the first negative electrode tab 330 may be connected to the plurality of second substrates 314a.

According to various embodiments, the first positive electrode tab 320 and the first negative electrode tab 330 may be located in different directions with respect to the first electrode assembly 300 . For example, the first positive electrode tab 320 is positioned in a first direction (eg, a +Z direction) of the unit cell 310 of the first electrode assembly 300 , and the first negative electrode tab 330 is a first electrode It may be located in the second direction (eg, -Z direction) of the unit cell 310 of the assembly 300 . Since the first positive electrode tab 320 and the first negative electrode tab 330 are spaced apart, an internal short circuit of the first electrode assembly 300 and/or the battery (eg, the battery 200 of FIG. 2 ) can be prevented or reduced. can

According to various embodiments, at least a portion of the first electrode assembly 300 may face the second electrode assembly (eg, the second electrode assembly 400 of FIG. 3 ). For example, the first electrode assembly 300 includes side surfaces 300a and 300b facing the width direction (eg, the Y-axis direction) of the battery (eg, the battery 200 of FIG. 2 ), and the side surface 300a , 300b) may face the second electrode assembly 400 . According to an embodiment, the at least one fourth separator 318 of the first electrode assembly 300 is a separator (eg, the third separator 418 or the second separator of FIG. 5 ) of the second electrode assembly 400 . (416)) can be encountered.

5 is a cross-sectional view of a second electrode assembly according to various embodiments of the present disclosure;

Referring to FIG. 5 , the unit cell 410 of the second electrode assembly 400 is disposed between the second positive electrode 412 , the second negative electrode 414 , and the second positive electrode 412 and the second negative electrode 414 . a second separator 416 , and a third separator 418 disposed on the second anode 412 or the second cathode 414 . The configuration of the second anode 412 , the second cathode 414 , the second separator 416 , and the third separator 418 of FIG. 5 is the first anode 312 and the first cathode 314 of FIG. 4 . , the first separator 316 , and the fourth separator 318 may have the same configuration in whole or in part.

According to various embodiments, the second anode 412 may include a third substrate 412a and a third mixture 412b surrounding the third substrate 412a. For example, the third substrate 412a may be disposed between a pair of third mixtures 412b. According to an embodiment, the third substrate 412a may include aluminum (Al). According to an embodiment, the third mixture 412b includes lithium (Li) oxide including a transition metal (eg, at least one of cobalt (Co), manganese (Mn), or iron (Fe)). can do.

According to various embodiments, the second negative electrode 414 may include a fourth substrate 414a and a fourth mixture 414b surrounding the fourth substrate 414a. For example, the fourth substrate 414a may be disposed between a pair of fourth mixtures 414b. According to an embodiment, the fourth substrate 414a may include copper (Cu). According to an embodiment, the fourth mixture 414b may include graphite and/or lithium (Li) titanium (Ti) oxide.

According to various embodiments, the second separator 416 physically separates the second positive electrode 412 and the second negative electrode 414, and a pore capable of moving a designated material (eg, lithium (Li) ions). (pore) may be a non-conductive porous body. According to an embodiment, the second separator 416 may be a synthetic resin (eg, polyethylene or polypropylene).

According to various embodiments, the unit cell 410 may include a second separator 416 and a third separator 418 spaced apart from the second separator 416 . When the second electrode assembly 400 or the unit cell 410 is wound, the second separator 416 and the third separator 418 may be disposed between the second anode 412 and the second cathode 414 . there is. For example, the second electrode assembly 400 is disposed in the order of the second anode 412 , the second separator 416 , the second cathode 414 , and the third separator 418 , or the third separator 418 . , a second anode 412 , a second separator 416 , and a second cathode 414 may include a unit cell 410 disposed in this order. According to an embodiment, the third separation layer 418 may be formed to surround the central region 402 . According to an embodiment, the central region 402 may have a substantially cylindrical shape.

According to various embodiments, the second electrode assembly 400 may include a second positive electrode tab 420 and a second negative electrode tab 430 . According to an embodiment, the second positive electrode tab 420 may be electrically connected to the second positive electrode 412 , and the second negative electrode tab 430 may be electrically connected to the second negative electrode 414 .

According to various embodiments, the second positive electrode tab 420 and the second negative electrode tab 430 may be positioned in different directions with respect to the second electrode assembly 400 . For example, the second positive electrode tab 420 is positioned in the first direction (eg, the +Z direction) of the unit cell 410 of the second electrode assembly 400 , and the second negative electrode tab 430 is the second electrode It may be positioned in the second direction (eg, -Z direction) of the unit cell 410 of the assembly 400 . Since the second positive electrode tab 420 and the second negative electrode tab 430 are spaced apart, an internal short circuit of the second electrode assembly 400 and/or the battery (eg, the battery 200 of FIG. 2 ) can be prevented or reduced. can

6 is a cross-sectional view taken along line A-A` of FIG. 2 .

Referring to FIG. 6 , the battery 200 may include a case 210 , a first electrode assembly 300 , and a second electrode assembly 400 . The configuration of the first electrode assembly 300 and the second electrode assembly 400 of FIG. 6 is all or part the same as the configuration of the first electrode assembly 300 of FIG. 4 and the second electrode assembly 400 of FIG. 5 . can do.

According to various embodiments, the case 210 forms the exterior of the battery 200 and provides a space for accommodating the first electrode assembly 300 and the second electrode assembly 400 that are the components of the battery 200 . can provide For example, the case 210 may include a first case 220 , a second case 230 , and an insulating member 240 . According to an embodiment, the case 210 may include a pouch or can structure encapsulating the first electrode assembly 300 and the second electrode assembly 400 .

According to various embodiments, the first case 220 may form a part of the exterior of the battery 200 . For example, the first case 220 has a first outer surface 220a facing a first direction (eg, +Z direction) and a second direction opposite to the first direction (+Z direction) (eg, -Z direction). direction) facing the first inner surface 220b may be included. According to an embodiment, the first case 220 may include a conductive material, and may transmit power provided from the first electrode assembly 300 and the second electrode assembly 400 to the outside of the battery 200 .

According to various embodiments, the second case 230 may form a part of the exterior of the battery 200 . For example, the second case 230 has a second outer surface 230a facing a second direction (eg, -Z direction) and a first direction (eg, +Z direction) opposite to the second direction (-Z direction). direction) toward the second inner surface 230b. According to an embodiment, the second case 230 may include a conductive material, and may transmit power provided from the first electrode assembly 300 and the second electrode assembly 400 to the outside of the battery 200 .

According to various embodiments, the case 210 may be electrically connected to the first electrode assembly 300 and the second electrode assembly 400 . According to an embodiment, the first case 220 may include a first connection member 222 extending from the first inner surface 220b. The first connection member 222 may be connected to the first positive electrode tab 320 and the second positive electrode tab 420 . According to an embodiment, the second case 230 may include a second connection member 232 extending from the second inner surface 230b. The second connection member 232 may be connected to the first negative electrode tab 330 and the second negative electrode tab 430 .

According to various embodiments, the first electrode assembly 300 may be connected in parallel with the second electrode assembly 400 . According to one embodiment, the second positive electrode tab 420 of the second electrode assembly 400 is connected in parallel with the first positive electrode tab 320 of the first electrode assembly 300 , and the second electrode assembly 400 . The second negative electrode tab 430 may be connected in parallel with the first negative electrode tab 330 of the first electrode assembly 300 .

According to various embodiments, the first connection member 222 may couple the first positive electrode tab 320 and the second positive electrode tab 330 to the first case 220 . For example, one end 222a of the first connection member 222 is coupled to the first positive electrode tab 320 and the second positive electrode tab 330 , and the other end 222b is connected to the first case 220 . It may be coupled to the first inner surface 220b.

According to various embodiments, the second connection member 232 may couple the first negative electrode tab 330 and the second negative electrode tab 430 to the second case 230 . For example, one end 232a of the second connection member 232 is coupled to the first negative electrode tab 420 and the second negative electrode tab 430 , and the other end 232b is connected to the second case 230 . It may be coupled to the second inner surface 230b.

According to various embodiments, the insulating member 240 may be disposed between the first case 220 and the second case 230 . According to an embodiment, the insulating member 240 may prevent the first case 220 and the second case 230 from contacting each other. For example, the first case 220 and the second case 230 may be electrically connected through the first electrode assembly 300 and/or the second electrode assembly 400 , but may not be directly connected. .

According to various embodiments, the inner space 250 of the case 210 may be filled with an electrolyte (not shown). The electrolyte is a medium through which lithium ions can move between a positive electrode (eg, the first positive electrode 312 or the second positive electrode 412) and a negative electrode (eg, the first negative electrode 414 or the second negative electrode 424). can be used

According to various embodiments, the battery 200 may include an adhesive member 260 for bonding the first electrode assembly 300 to the second electrode assembly 400 . According to an embodiment, the adhesive member 260 may be disposed between the first electrode assembly 300 and the second electrode assembly 400 . For example, the adhesive member 260 may be formed on the surface of the first electrode assembly 300 (eg, the side surfaces 300a and 300b of FIG. 4 ) and the second separator 416 or the third separator of the second electrode assembly 400 . 418 may be disposed between.

7A is a cross-sectional view taken along line B-B′ of FIG. 2 according to an embodiment of the present disclosure, and FIG. 7B is a cross-sectional view taken along line B-B′ of FIG. 2 according to another embodiment of the present disclosure.

7A and 7B , the battery 200 may include a second electrode assembly 400 surrounding the first electrode assembly 300 . The configuration of the first electrode assembly 300 and the second electrode assembly 400 of FIGS. 7A and 7B is all or partly the same as the configuration of the first electrode assembly 300 and the second electrode assembly 400 of FIG. 3 . can do.

According to various embodiments, the first electrode assembly 300 may include a plurality of unit cells 310a. For example, the first electrode assembly 300 may be an electrode assembly in which a plurality of stacked unit cells 310a are combined. The configuration of the plurality of unit cells 310a of FIG. 7A may be all or partly the same as that of the unit cell 310 of FIG. 4 .

According to various embodiments, the first electrode assembly 300 may have a wound roll shape. For example, the first electrode assembly 300 may be a jelly roll-shaped electrode assembly, and the first electrode assembly 300 may be the unit cell 310b itself. When the first electrode assembly 300 has a wound roll shape, the first electrode assembly 300 may have a shape pressed by an external force. For example, a portion of the first electrode assembly 300 and/or the unit cell 310b may be stacked with another portion of the first electrode assembly 300 and/or the unit cell 310b.

According to various embodiments, the first electrode assembly 300 may be an electrode assembly having a single plate shape or a folding shape, and may be a unit cell 310 itself. For example, the at least one first positive electrode (eg, first positive electrode 312 in FIG. 4 ), the at least one first negative electrode (eg, first negative electrode 314 in FIG. 4 ), and the at least one Each of the first separators (eg, the first separator 316 of FIG. 4 ) may be provided one by one. According to an embodiment, the first electrode assembly 300 includes one positive electrode (eg, the first positive electrode 312 of FIG. 4 ), one negative electrode (eg, the first negative electrode 314 of FIG. 4 ), and one It may be a rectangular unit cell 310 including a separation membrane (eg, the first separation membrane 316 of FIG. 4 ) or a folded unit cell 310 . The configuration of the unit cell 310b of FIG. 7B may be all or partly the same as that of the unit cell 310 of FIG. 4 .

According to various embodiments, the second electrode assembly 400 may include one unit cell 410 . According to an embodiment, the second electrode assembly 400 may have a wound roll shape. For example, the second electrode assembly 400 may be a jelly roll-shaped electrode assembly surrounding the central region 402 , and the second electrode assembly 400 may be the unit cell 410 itself. . According to an embodiment, the first electrode assembly 300 may be disposed in the central region 402 formed by the second electrode assembly 400 . According to an embodiment, the central region 402 may be a space configured to insert a device (eg, a mandrel) for winding the unit cell 410 of the second electrode assembly 400 . According to an embodiment, the volume of the first electrode assembly 300 may be smaller than the volume of the second electrode assembly 400 .

8 is a schematic diagram of a first electrode assembly disposed in a central region, according to an embodiment of the present disclosure; 9 is a schematic diagram of a first electrode assembly disposed in a central region, according to another embodiment of the present disclosure;

8 and 9 , the first electrode assembly 300 may include a plurality of unit cells 340 , 350 , and 360 . The configuration of the plurality of unit cells 340 , 350 , and 360 of FIGS. 8 and 9 may be all or partly the same as that of the unit cell 310 of FIG. 4 .

According to various embodiments, the first electrode assembly 300 includes at least one first unit cell 340 , at least one second unit cell 350 , and at least one third unit cell 360 . can do. According to an embodiment, at least one first unit cell 340 , at least one second unit cell 350 , and at least one third unit cell 360 may be stacked. For example, the at least one second unit cell 350 may be disposed between the at least one first unit cell 340 and the at least one third unit cell 350 .

According to various embodiments, the first unit cell 340 , the second unit cell 350 , and the third unit cell 360 may include a positive electrode (eg, the first positive electrode 312 of FIG. 4 ) and a negative electrode (eg, a negative electrode). : the first cathode 314 of FIG. 4 ), and a separator (eg, the first separator 316 and the fourth separator 318 of FIG. 4 ). According to an embodiment, the first unit cell 340 includes a 1-1 positive electrode 342 , a 1-1 negative electrode 344 , and a 1-1 positive electrode 342 and a 1-1 negative electrode 344 . It may include a 1-1 separation membrane 346 disposed in the , and a 1-2 separation membrane 348 disposed on the 1-1 positive electrode 342 or the 1-1 negative electrode 344 . According to an exemplary embodiment, the second unit cell 350 is formed between the 1-2-th positive electrode 352 , the 1-2-th negative electrode 354 , and the 1-2-th positive electrode 352 and the 1-2 negative electrode 354 . It may include a 1-3 th separator 356 disposed on , and a 1-4 th separator 358 disposed on the 1-2 th anode 352 or the 1-2 th cathode 354 . According to an embodiment, the third unit cell 360 is formed between the 1-3 positive electrode 362 , the 1-3 negative electrode 364 , and the 1-3 positive electrode 362 and the 1-3 negative electrode 364 . It may include a 1-5th separator 366 disposed on the , and a 1-6th separator 368 disposed on the 1-3 anode 362 or the 1-3 cathode 364 .

According to various embodiments, the first electrode assembly 300 may include a first unit cell 340 , a second unit cell 350 , and a third unit cell 360 having substantially the same length. For example, the first unit cell 340 , the second unit cell 350 , and the third unit cell 360 have the same length in the width direction (eg, the Y-axis direction), and the first electrode assembly 300 . ) may have a rectangular or square shape.

According to various embodiments, the first electrode assembly 300 may be formed in a shape corresponding to the central region 402 formed by the second electrode assembly 400 . For example, the first electrode assembly 300 may include a plurality of unit cells 340 , 350 , and 360 having different lengths. According to an embodiment, the plurality of unit cells 340 , 350 , and 360 of the first electrode assembly 300 may correspond to the central region 402 having a substantially circular shape, so that the center of the central region 402 . The closer to the , the longer the length may be. For example, the third length d3 of the at least one third unit cell 360 is longer than the second length d2 of the at least one second unit cell 350, and the at least one second unit cell ( The second length d2 of the 350 may be longer than the first length d1 of the at least one first unit cell 340 .

According to various embodiments, the types of the plurality of unit cells 340 , 350 , 360 and 370 of the first electrode assembly 300 may be formed in various ways. For example, the first electrode assembly 300 may further include at least one unit cell 370 shorter than the first unit cell 340 .

division	second electrode assembly				battery
	Length of central area (D)	Width of the second cathode (W)	of the second cathode Length (H)	capacity	capacity increase
Example 1	0.25	0.177	0.38	3.2	3.8
Example 2	0.233	0.165	0.38	2.8	4.7
Example 3	0.25	0.25	0.38	4.08	4.8
Example 4	0.233	0.233	0.38	3.64	6.07

[Table 1] is for comparing the capacity of the battery 200 including the first electrode assembly 300 and the second electrode assembly 400 and the capacity of the battery 200 including only the second electrode assembly 400 is a table

Referring to [Table 1], the capacity of the battery 200 may be determined based on the structures of the first electrode assembly 300 and/or the second electrode assembly 400 . For example, the capacity of the battery 200 depends on the shape of the first electrode assembly 300 , the size of the central region 402 of the second electrode assembly 400 , and the negative electrode of the second electrode assembly 400 (eg, FIG. 5 , it may be determined based on at least one of the length and width of the second cathode 414 ) and the capacity of the second electrode assembly 400 . According to an embodiment, in Embodiments 1, 2, 3, and 4, the current density of the second electrode assembly 400 may be 3.4 mAh/cm ² .

According to various embodiments, in a battery having a cylindrical or coin shape, the first electrode assembly 300 is accommodated in the central region 402 surrounded by the second electrode assembly 400 , so that the total capacity of the battery 200 . can be increased.

According to various embodiments, Embodiments 1 and 2 are embodiments including the first electrode assembly 300 of FIG. 8 . For example, Embodiments 1 and 2 are embodiments of the first electrode assembly 300 including a plurality of unit cells 340 , 350 , and 360 having substantially the same size.

According to Embodiment 1, the battery 200 has a diameter D of the central region 402 of 0.25 cm, and a negative electrode (eg, the second negative electrode 414 in FIG. 5 ) (eg, in FIG. 5 ). The length (H) of the second cathode 414 is 0.38 cm, the width of the second cathode 414 (eg, the width W of the second cathode 414 in FIG. 5 ) is 0.177 cm, and the capacitance The capacity may include the second electrode assembly 400 having a capacity of 3.2 mAh and the first electrode assembly 300 disposed in the central region 402 formed by the second electrode assembly 400 . The first electrode assembly 300 may include a plurality of unit cells 340 , 350 , and 360 having substantially the same size. For example, the first electrode assembly 300 includes 14 unit cells (eg, the unit cell 310 of FIG. 4 ), and a thickness of each unit cell 310 (eg, the first unit cell 340 ). ) may have a thickness (t)) of 0.0132 mm. According to an embodiment, the capacity of the battery 200 including the first electrode assembly 300 and the second electrode assembly 400 may increase by 3.8% compared to the capacity of the second electrode assembly 400 .

According to the second embodiment, the battery 200 has a length D of a diameter of the central region 402 of 0.233 cm, and a length of a negative electrode (eg, the second negative electrode 414 in FIG. 5 ) (eg, in FIG. 5 ). The length (H) of the second cathode 414 is 0.38 cm, the width of the second cathode 414 (eg, the width W of the second cathode 414 in FIG. 5 ) is 0.165 cm, and the capacitance The capacity may include the second electrode assembly 400 having a capacity of 2.8 mAh and the first electrode assembly 300 disposed in the central region 402 formed by the second electrode assembly 400 . The first electrode assembly 300 may include a plurality of unit cells 340 , 350 , and 360 having substantially the same size. For example, the first electrode assembly 300 includes 13 unit cells (eg, the unit cell 310 of FIG. 4 ), and a thickness of each of the unit cells 310 (eg, the first unit cell 340 ). ) may have a thickness (t)) of 0.0132 mm. According to an embodiment, the capacity of the battery 200 including the first electrode assembly 300 and the second electrode assembly 400 may increase by 4.7% compared to the capacity of the second electrode assembly 400 .

According to various embodiments, Examples 3 and 4 are examples including the first electrode assembly 300 of FIG. 9 . For example, Examples 3 and 4 are examples of the first electrode assembly 300 including a plurality of unit cells 340 , 350 , and 360 having different sizes.

According to the third embodiment, the battery 200 has a length D of a diameter of the central region 402 of 0.25 cm, and a length of a negative electrode (eg, the second negative electrode 414 in FIG. 5 ) (eg, in FIG. 5 ). The length (H) of the second negative electrode 414) is 0.38 cm, the width of the negative electrode (eg, the width (W) of the second negative electrode 414 in FIG. 5 ) is 0.25 cm, and the capacity is 4.08 It may include a second electrode assembly 400 of mAh and a first electrode assembly 300 disposed in a central region 402 formed by the second electrode assembly 400 . The first electrode assembly 300 may include a plurality of unit cells 340 , 350 , and 360 having different sizes. For example, the first electrode assembly 300 may include a plurality of unit cells 340 , 350 , and 360 having a sum of widths of 3.16 mm. According to an embodiment, the capacity of the battery 200 including the first electrode assembly 300 and the second electrode assembly 400 may increase by 4.8% compared to the capacity of the second electrode assembly 400 .

According to the fourth embodiment, the battery 200 has a diameter D of 0.233 cm of the central region 402, a negative electrode (eg, the second negative electrode 414 in FIG. 5 ) has a length of 0.38 cm, and the negative electrode has a width of 0.233 cm, a capacity of 3.64 mAh, and a second electrode assembly 400 and a first electrode assembly 300 disposed in a central region 402 formed by the second electrode assembly 400 . may include The first electrode assembly 300 may include a plurality of unit cells 340 , 350 , and 360 having different sizes. For example, the first electrode assembly 300 may include a plurality of unit cells 340 , 350 , and 360 having a sum of widths of 2.82 mm. According to an embodiment, the capacity of the battery 200 including the first electrode assembly 300 and the second electrode assembly 400 may increase by 6.07% compared to the capacity of the second electrode assembly 400 .

According to various embodiments of the present disclosure, the battery (eg, the battery 200 of FIG. 2 ) is disposed in a case (eg, the case 210 of FIG. 6 ), the case, and at least one first positive electrode ( Example: first anode 312 of FIG. 4 ), at least one first cathode (eg, first cathode 314 of FIG. 4 ), and between the at least one first anode and the at least one first cathode A first electrode assembly (eg, the first electrode assembly 300 of FIG. 4 ) including at least one first separator (eg, the first separator 316 of FIG. 4 ) disposed in the case, and disposed in the case , a wound roll-shaped second electrode assembly (eg, the second electrode assembly 400 of FIG. 5 ) surrounding the first electrode assembly, and a second positive electrode (eg, the second positive electrode 412 of FIG. 5 ) , a second negative electrode (eg, the second negative electrode 414 of FIG. 5 ), a second separator disposed between the second positive electrode and the second negative electrode (eg, the second separator 416 of FIG. 5 ), and the A second electrode assembly (eg, the second electrode assembly 400 of FIG. 5 ) including a second positive electrode or a third separator (eg, the third separator 418 of FIG. 5 ) disposed on the second negative electrode may include

According to various embodiments, the first electrode assembly may include at least one fourth separator (eg, the fourth separator 318 of FIG. 4 ) disposed on the at least one first anode or the at least one first cathode. ), and the at least one fourth separator may face the third separator.

According to various embodiments, the first electrode assembly may include a 1-1 positive electrode (eg, the 1-1 positive electrode 342 of FIG. 8 ) and a 1-1 negative electrode (eg, the 1-1 negative electrode of FIG. 8 ). (344)), and a 1-1 separator disposed between the 1-1 positive electrode and the 1-1 negative electrode (eg, the 1-1 separator 346 of FIG. 8), and the 1-1 separator At least one first unit cell (eg, the first unit cell of FIG. 8 ) including a 1-2 th separator (eg, the 1-2 th separator 348 of FIG. 8 ) disposed on the positive electrode or the 1-1 negative electrode unit cell 340), a 1-2 positive electrode (eg, the 1-2 positive electrode 352 of FIG. 8), a 1-2 negative electrode (eg, the 1-2 negative electrode 354 of FIG. 8), and A 1-3 separator (eg, the 1-3 separator 356 of FIG. 8 ) disposed between the 1-2 positive electrode and the 1-2 negative electrode, and the 1-2 positive electrode or the first- 2 At least one second unit cell (eg, the second unit cell 350 of FIG. 8 ) including the 1-4th separator (eg, the 1-4th separator 356 of FIG. 8 ) disposed on the negative electrode , and 1-3 positive electrodes (eg, 1-3 positive electrode 362 of FIG. 8 ), 1-3 negative electrode (eg, 1-3 negative electrode 364 of FIG. 8 ), and 1-3 above A 1-5th separator (eg, the 1-5th separator 366 of FIG. 8 ) disposed between the positive electrode and the 1-3 negative electrode, and disposed on the 1-3 positive electrode or the 1-3 negative electrode at least one third unit cell (eg, the third unit cell 360 of FIG. 8 ) including the first to sixth separation membranes (eg, the 1-6 separation membrane 368 of FIG. 8 ); At least one second unit cell may be disposed between the at least one first unit cell and the at least one third unit cell.

According to various embodiments, the third length (eg, the third length d3 of FIG. 9 ) of the at least one third unit cell is the second length of the at least one second unit cell (eg, FIG. 9 ) is longer than the second length d2 of the battery, and the second length is longer than the first length (eg, the first length d1 of FIG. 9 ) of the at least one first unit cell.

According to various embodiments, in the first electrode assembly, the first electrode assembly includes a first positive electrode tab (eg, the first positive electrode tab 320 of FIG. 4 ) connected to the at least one first positive electrode and the a first negative electrode tab (eg, the first negative electrode tab 330 of FIG. 4 ) connected to at least one first negative electrode, wherein the second electrode assembly includes a second positive electrode tab (eg, a second positive electrode tab) connected to the second positive electrode The second positive electrode tab 420 of FIG. 5) and a second negative electrode tab connected to the second negative electrode (eg, the second negative electrode tab 430 of FIG. 4 ) may be included.

According to various embodiments, the first positive electrode tab and the second positive electrode tab may be connected in parallel, and the first negative electrode tab and the second negative electrode tab may be connected in parallel.

According to various embodiments, the case has a first outer surface (eg, the first outer surface 220a in FIG. 6 ) facing the first direction (eg, the +Z direction in FIG. 6 ), and a second opposite to the first outer surface A first case (eg, the first inner surface 220b of FIG. 6 ) including one inner surface (eg, the first inner surface 220b of FIG. 6 ), and a first connection member extending from the first inner surface (eg, the first connection member 222 of FIG. 6 ) : the first case 220 of FIG. 6), the second outer surface (eg, the second outer surface 230a of FIG. 6) facing the second direction (eg, the -Z direction in FIG. 6) opposite to the first direction) , a second inner surface opposite to the second outer surface (eg, the second inner surface 230b of FIG. 6 ), and a second connecting member extending from the second inner surface (eg, the second connecting member 232 of FIG. 6 ) ) including a second case (eg, the second connection member 232 of FIG. 6 ), wherein the at least one first positive electrode tab and the second positive electrode tab are connected to the first connection member, and the At least one first negative electrode tab and the second negative electrode tab may be connected to the second connection member.

According to various embodiments, the case may include an insulating member (eg, the insulating member 240 of FIG. 6 ) disposed between the first case and the second case.

According to various embodiments, the first electrode assembly may have a wound roll shape, and a portion of the first electrode assembly may be stacked with another portion of the electrode assembly.

According to various embodiments, the first electrode assembly may include one of an anode of one of the at least one first anode, a cathode of one of the at least one first cathode, and one of the at least one first separator may include a separation membrane of

According to various embodiments, the at least one first positive electrode may include a first substrate including aluminum (eg, the first substrate 312a in FIG. 4 ) and a first mixture including lithium oxide (eg, in FIG. 4 ). a first mixture 312b), wherein the second positive electrode includes a third substrate including aluminum (eg, the third substrate 412a of FIG. 5 ) and a third mixture containing lithium oxide (eg, FIG. 5 ) of the third mixture 412b).

According to various embodiments, the at least one first negative electrode includes a second substrate including copper (eg, the second substrate 314a of FIG. 4 ) and a second mixture containing graphite (eg, the second substrate of FIG. 4 ) 2 mixture 314b), wherein the second negative electrode includes a fourth substrate including copper (eg, the fourth substrate 414a of FIG. 5) and a fourth mixture containing graphite (eg, the fourth substrate of FIG. 5) 2 mixture 414b).

According to various embodiments, the battery may further include an adhesive member (eg, the adhesive member 260 of FIG. 6 ) disposed between the first electrode assembly and the second electrode assembly.

According to various embodiments, the case may have a coin or cylindrical shape.

According to various embodiments of the present disclosure, an electronic device (eg, the electronic device 100 of FIG. 1A or FIG. 1B ) includes a housing (eg, the housing 101 of FIG. 1 ) and a battery (eg, the battery disposed in the housing) : battery 200 of FIG. 2 ), wherein the battery includes a case (eg, case 210 of FIG. 6 ), disposed in the case, and at least one first positive electrode (eg, first of FIG. 4 ) anode 312 ), at least one first cathode (eg, first cathode 314 in FIG. 4 ), and at least one second cathode disposed between the at least one first anode and the at least one first cathode 1 a first electrode assembly (eg, the first electrode assembly 300 of FIG. 4 ) including a separator (eg, the first separator 316 of FIG. 4 ), and disposed in the case, the first electrode assembly A second electrode assembly (eg, the second electrode assembly 400 of FIG. 5 ) in the shape of a wound roll that surrounds, a second positive electrode (eg, the second positive electrode 412 of FIG. 5 ), a second negative electrode (eg, the second electrode assembly 400 of FIG. 5 ) the second cathode 414 of FIG. 5 ), a second separator disposed between the second anode and the second cathode (eg, the second separator 416 of FIG. 5 ), and the second anode or the second cathode A second electrode assembly (eg, the second electrode assembly 400 of FIG. 5 ) including a third separator (eg, the third separator 418 of FIG. 5 ) disposed on the negative electrode may be included.

According to various embodiments, in the first electrode assembly, the first electrode assembly includes a first positive electrode tab (eg, the first positive electrode tab 320 of FIG. 4 ) connected to the at least one first positive electrode and the a first negative electrode tab (eg, the first negative electrode tab 330 of FIG. 4 ) connected to at least one first negative electrode, wherein the second electrode assembly includes a second positive electrode tab (eg, a second positive electrode tab) connected to the second positive electrode a second positive electrode tab 420 of FIG. 5 ) and a second negative electrode tab connected to the second negative electrode (eg, the second negative electrode tab 430 of FIG. 4 ), the first positive electrode tab and the second positive electrode tab The tabs may be connected in parallel, and the first negative electrode tab and the second negative electrode tab may be connected in parallel.

The various batteries of the present disclosure described above and electronic devices including the batteries are not limited by the above-described embodiments and drawings, and it is understood that various substitutions, modifications, and changes are possible within the technical scope of the present disclosure. It will be clear to one of ordinary skill in the art.

Claims (15)

1. in the battery,

   case;

   a first separator disposed in the case and comprising at least one first positive electrode, at least one first negative electrode, and at least one first separator disposed between the at least one first positive electrode and the at least one first negative electrode 1 electrode assembly; and

   A second electrode assembly disposed in the case and having a wound roll shape surrounding the first electrode assembly,

   a second electrode assembly including a second anode, a second cathode, a second separator disposed between the second anode and the second cathode, and a third separator disposed on the second anode or the second cathode included battery.
2. According to claim 1,

   The first electrode assembly includes at least one fourth separator disposed on the at least one first anode or the at least one first cathode, wherein the at least one fourth separator faces the third separator battery.
3. According to claim 1,

   The first electrode assembly is

   A 1-1 positive electrode, a 1-1 negative electrode, a 1-1 separator disposed between the 1-1 positive electrode and the 1-1 negative electrode, and the 1-1 positive electrode or the 1-1 negative electrode at least one first unit cell including a 1-2 separation membrane disposed thereon;

   A 1-2 positive electrode, a 1-2 negative electrode, a 1-3 separator disposed between the 1-2 positive electrode and the 1-2 negative electrode, and the 1-2 positive electrode or the 1-2 negative electrode at least one second unit cell including first to fourth separation membranes disposed thereon, and

   A 1-3 positive electrode, a 1-3 negative electrode, and a 1-5 separator disposed between the 1-3 positive electrode and the 1-3 negative electrode, and the 1-3 positive electrode or the 1-3 negative electrode at least one third unit cell including a 1-6 separation membrane disposed thereon;

   The at least one second unit cell is disposed between the at least one first unit cell and the at least one third unit cell.
4. 4. The method of claim 3,

   A third length of the at least one third unit cell is longer than a second length of the at least one second unit cell, and the second length is longer than a first length of the at least one first unit cell.
5. According to claim 1,

   The first electrode assembly includes at least one first positive electrode tab connected to the at least one first positive electrode and at least one first negative electrode tab connected to the at least one first negative electrode,

   The second electrode assembly includes at least one second positive electrode tab connected to the second positive electrode and at least one second negative electrode tab connected to the second negative electrode.
6. 6. The method of claim 5,

   the at least one first positive electrode tab and the at least one second positive electrode tab are connected in parallel;

   the at least one first negative electrode tab and the at least one second negative electrode tab are connected in parallel.
7. 6. The method of claim 5,

   The case includes a first case including a first outer surface facing in a first direction, a first inner surface opposite to the first outer surface, and a first connection member extending from the first inner surface;

   a second case including a second outer surface facing a second direction opposite to the first direction, a second inner surface opposite to the second outer surface, and a second connection member extending from the second inner surface,

   the at least one first positive electrode tab and the second positive electrode tab are connected to the first connection member;

   The at least one first negative electrode tab and the second negative electrode tab are connected to the second connection member.
8. 8. The method of claim 7,

   The case includes an insulating member disposed between the first case and the second case.
9. According to claim 1,

   The first electrode assembly has a wound roll shape, and a portion of the first electrode assembly is stacked with another portion of the electrode assembly.
10. According to claim 1,

    wherein the first electrode assembly includes a positive electrode of one of the at least one first positive electrode, a negative electrode of one of the at least one first negative electrode, and one separator of the at least one first separator.
11. According to claim 1,

    The at least one first positive electrode includes a first base material containing aluminum and a first mixture containing lithium oxide,

    The second positive electrode is a battery comprising a third base material containing aluminum and a third mixture containing lithium oxide.
12. According to claim 1,

    The at least one first negative electrode includes a second substrate including copper and a second mixture including graphite,

    The second negative electrode includes a fourth base material including copper and a fourth mixture including graphite.
13. According to claim 1,

    The battery further comprising an adhesive member disposed between the first electrode assembly and the second electrode assembly.
14. According to claim 1,

    The case is a coin or cylindrical battery.
15. An electronic device comprising the battery of claim 1, comprising:

    comprising a housing;

    wherein the battery is disposed within the housing.

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