WO2022220630A1

WO2022220630A1 - Battery structure and electronic device comprising same

Info

Publication number: WO2022220630A1
Application number: PCT/KR2022/005444
Authority: WO
Inventors: 허준영; 오부근; 염시훈
Original assignee: 삼성전자 주식회사
Priority date: 2021-04-16
Filing date: 2022-04-14
Publication date: 2022-10-20
Also published as: KR20220143398A

Abstract

An electronic device according to an embodiment disclosed in the present document comprises a battery, the battery comprising: an electrode assembly comprising a positive electrode layer, a negative electrode layer, and a separator disposed between the positive electrode layer and the negative electrode layer, wherein the positive electrode layer and the negative electrode layer are alternately laminated along a first direction; and a pouch for surrounding the electrode assembly, wherein the positive electrode layer comprises a first positive electrode, a first spacing maintenance member, and a second positive electrode along a second direction perpendicular to the first direction, and the negative electrode layer comprises a first negative electrode, a second spacing maintenance member, and a second negative electrode along the second direction.

Description

Battery structure and electronic device including same

Various embodiments disclosed herein relate to a structure of a battery and an electronic device including the same, and to a method of separating a plurality of cells of a battery.

Electronic devices (eg, smart phones) can receive power using batteries, and as electronic devices become larger and have higher capacities, there is an increasing demand for fast charging of batteries and securing stability in abuse environments.

The battery may include an electrode assembly including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, and a pouch surrounding the electrode assembly. In the electrode assembly, positive and negative electrodes are alternately stacked with a separator interposed therebetween to form one cell.

When a short circuit occurs inside a battery including an electrode assembly made of one cell, the entire energy of the battery is concentrated in one place, heat is intensified, and ignition may occur.

A battery including an electrode assembly including one cell may have a slow charging rate.

Various embodiments disclosed in this document may provide a battery structure for securing stability in an abuse environment of a battery and performing fast charging, an electronic device including the same, and the like.

An electronic device according to an embodiment disclosed in this document includes a battery, wherein the battery includes a positive electrode layer, a negative electrode layer, and a separator disposed between the positive electrode layer and the negative electrode layer, the positive electrode layer and the negative electrode layer an electrode assembly formed by being alternately stacked along the first direction, and a pouch surrounding the electrode assembly, wherein the anode layer includes a first anode and a first gap in a second direction perpendicular to the first direction a holding member, and a second anode, and the cathode layer may include a first cathode, a second spacing member, and a second cathode along the second direction.

An electronic device according to an embodiment disclosed in this document includes a battery, wherein the battery includes a positive electrode layer, a negative electrode layer, and a separator disposed between the positive electrode layer and the negative electrode layer, wherein the positive electrode layer and the negative electrode layer are An electrode assembly formed by being alternately stacked along a first direction, and a pouch surrounding the electrode assembly, wherein the positive electrode layer includes a first positive electrode and the first one in a second direction perpendicular to the first direction. and a second anode spaced apart from the anode, and the cathode layer may include a first cathode along the second direction and a second cathode spaced apart from the first cathode.

An electronic device according to an embodiment disclosed in this document includes a battery, wherein the battery includes a positive electrode layer, a negative electrode layer, and a separator disposed between the positive electrode layer and the negative electrode layer, wherein the positive electrode layer and the negative electrode layer are An electrode assembly formed by being alternately stacked in a first direction, and a pouch surrounding the electrode assembly, wherein the positive electrode layer includes a first positive electrode and the first positive electrode in a second direction perpendicular to the first direction. and a second anode spaced apart from; and between the first negative electrode and the second negative electrode, and in contact with another adjacent separator, the electrode assembly has a first height along the first direction and is located at the center of the first height. 1 The first length corresponding to the unfolded state of the separator is a second length corresponding to the unfolded state of the second separator positioned at a point higher than the center of the first height, and a second length corresponding to the unfolded state of the first height. The third separator may be formed to be shorter than a third length corresponding to an unfolded state.

According to various embodiments disclosed in this document, the electrode assembly may include a plurality of cells due to physical separation between the plurality of electrode substrates. Through this, when a short circuit occurs inside the battery, it is possible to ensure stability by dispersing concentrated energy, and a plurality of cells can be serially connected to perform fast charging.

In addition, various effects directly or indirectly identified through this document may be provided.

1 is a block diagram of an electronic device in a network environment according to an embodiment.

2A illustrates an electrode assembly including two cells according to an embodiment.

FIG. 2B illustrates a battery enclosing the electrode assembly shown in FIG. 2A in a pouch according to an embodiment.

FIG. 2C is a cross-sectional view taken along line A-A' of the battery shown in FIG. 2B according to an exemplary embodiment.

FIG. 2D is a cross-sectional view taken along line A-A' of the battery shown in FIG. 2B according to an exemplary embodiment.

3A illustrates an electrode assembly of a battery including three cells according to an embodiment.

FIG. 3B illustrates a battery in which the electrode assembly of FIG. 3B is surrounded by a pouch according to an exemplary embodiment.

3C is a cross-sectional view taken along line B-B' of the battery shown in FIG. 3B according to an embodiment.

4A illustrates an electrode assembly including two cells according to an embodiment.

4B is a cross-sectional view taken along line C-C' of the electrode assembly shown in FIG. 4A according to an exemplary embodiment.

5 is a cross-sectional view illustrating an electrode assembly including three cells according to an embodiment.

In connection with the description of the drawings, the same or similar reference numerals may be used for the same or similar components.

Hereinafter, various embodiments will be described with reference to the accompanying drawings. However, this is not intended to limit the specific embodiments, and should be understood to include various modifications, equivalents, and/or alternatives of the embodiments.

1 is a block diagram of an electronic device 101 in a network environment 100 according to an embodiment.

Referring to FIG. 1 , in a network environment 100 , an electronic device 101 communicates with an electronic device 102 through a first network 198 (eg, a short-range wireless communication network) or a second network 199 . It may communicate with the electronic device 104 or the server 108 through (eg, a long-distance wireless communication network). According to an embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108 . According to an embodiment, the electronic device 101 includes a processor 120 , a memory 130 , an input module 150 , a sound output module 155 , a display module 160 , an audio module 170 , and a sensor module ( 176), interface 177, connection terminal 178, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196 , or an antenna module 197 . In some embodiments, at least one of these components (eg, the connection terminal 178 ) may be omitted or one or more other components may be added to the electronic device 101 . In some embodiments, some of these components (eg, sensor module 176 , camera module 180 , or antenna module 197 ) are integrated into one component (eg, display module 160 ). can be

The processor 120, for example, executes software (eg, a program 140) to execute at least one other component (eg, a hardware or software component) of the electronic device 101 connected to the processor 120. It can control and perform various data processing or operations. According to one embodiment, as at least part of data processing or operation, the processor 120 converts commands or data received from other components (eg, the sensor module 176 or the communication module 190 ) to the volatile memory 132 . may be stored in , process commands or data stored in the volatile memory 132 , and store the result data in the non-volatile memory 134 . According to an embodiment, the processor 120 is the main processor 121 (eg, a central processing unit or an application processor) or a secondary processor 123 (eg, a graphic processing unit, a neural network processing unit (eg, a graphic processing unit, a neural network processing unit) a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, when the electronic device 101 includes the main processor 121 and the sub-processor 123 , the sub-processor 123 uses less power than the main processor 121 or is set to be specialized for a specified function. can The auxiliary processor 123 may be implemented separately from or as a part of the main processor 121 .

The secondary processor 123 may, for example, act on behalf of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or when the main processor 121 is active (eg, executing an application). ), together with the main processor 121, at least one of the components of the electronic device 101 (eg, the display module 160, the sensor module 176, or the communication module 190) It is possible to control at least some of the related functions or states. According to an embodiment, the coprocessor 123 (eg, an image signal processor or a communication processor) may be implemented as part of another functionally related component (eg, the camera module 180 or the communication module 190 ). have. According to an embodiment, the auxiliary processor 123 (eg, a neural network processing device) may include a hardware structure specialized for processing an artificial intelligence model. Artificial intelligence models can be created through machine learning. Such learning may be performed, for example, in the electronic device 101 itself on which artificial intelligence is performed, or may be performed through a separate server (eg, the server 108). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but in the above example not limited The artificial intelligence model may include a plurality of artificial neural network layers. Artificial neural networks include deep neural networks (DNNs), convolutional neural networks (CNNs), recurrent neural networks (RNNs), restricted boltzmann machines (RBMs), deep belief networks (DBNs), bidirectional recurrent deep neural networks (BRDNNs), It may be one of deep Q-networks or a combination of two or more of the above, but is not limited to the above example. The artificial intelligence model may include, in addition to, or alternatively, a software structure in addition to the hardware structure.

The memory 130 may store various data used by at least one component (eg, the processor 120 or the sensor module 176 ) of the electronic device 101 . The data may include, for example, input data or output data for software (eg, the program 140 ) and instructions related thereto. The memory 130 may include a volatile memory 132 or a non-volatile memory 134 .

The program 140 may be stored as software in the memory 130 , and may include, for example, an operating system 142 , middleware 144 , or an application 146 .

The input module 150 may receive a command or data to be used by a component (eg, the processor 120 ) of the electronic device 101 from the outside (eg, a user) of the electronic device 101 . The input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (eg, a button), or a digital pen (eg, a stylus pen).

The sound output module 155 may output a sound signal to the outside of the electronic device 101 . The sound output module 155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from or as part of the speaker.

The display module 160 may visually provide information to the outside (eg, a user) of the electronic device 101 . The display module 160 may include, for example, a control circuit for controlling a display, a hologram device, or a projector and a corresponding device. According to an embodiment, the display module 160 may include a touch sensor configured to sense a touch or a pressure sensor configured to measure the intensity of a force generated by the touch.

The audio module 170 may convert a sound into an electric signal or, conversely, convert an electric signal into a sound. According to an embodiment, the audio module 170 acquires a sound through the input module 150 , or an external electronic device (eg, a sound output module 155 ) connected directly or wirelessly with the electronic device 101 . The electronic device 102) (eg, a speaker or headphones) may output a sound.

The sensor module 176 detects an operating state (eg, power or temperature) of the electronic device 101 or an external environmental state (eg, a user state), and generates an electrical signal or data value corresponding to the sensed state. can do. According to an embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, It may include a temperature sensor, a humidity sensor, or an illuminance sensor.

The interface 177 may support one or more specified protocols that may be used by the electronic device 101 to directly or wirelessly connect with an external electronic device (eg, the electronic device 102 ). According to an embodiment, the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 178 may include a connector through which the electronic device 101 can be physically connected to an external electronic device (eg, the electronic device 102 ). According to an embodiment, the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).

The haptic module 179 may convert an electrical signal into a mechanical stimulus (eg, vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic sense. According to an embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 may capture still images and moving images. According to an embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 188 may manage power supplied to the electronic device 101 . According to an embodiment, the power management module 188 may be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

The battery 189 may supply power to at least one component of the electronic device 101 . According to one embodiment, battery 189 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.

The communication module 190 is a direct (eg, wired) communication channel or a wireless communication channel between the electronic device 101 and an external electronic device (eg, the electronic device 102, the electronic device 104, or the server 108). It can support establishment and communication performance through the established communication channel. The communication module 190 may include one or more communication processors that operate independently of the processor 120 (eg, an application processor) and support direct (eg, wired) communication or wireless communication. According to one embodiment, the communication module 190 is a wireless communication module 192 (eg, a cellular communication module, a short-range communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (eg, : It may include a local area network (LAN) communication module, or a power line communication module). A corresponding communication module among these communication modules is a first network 198 (eg, a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network 199 (eg, legacy It may communicate with the external electronic device 104 through a cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (eg, a telecommunication network such as a LAN or a WAN). These various types of communication modules may be integrated into one component (eg, a single chip) or may be implemented as a plurality of components (eg, multiple chips) separate from each other. The wireless communication module 192 uses subscriber information (eg, International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 196 within a communication network such as the first network 198 or the second network 199 . The electronic device 101 may be identified or authenticated.

The wireless communication module 192 may support a 5G network after a 4G network and a next-generation communication technology, for example, a new radio access technology (NR). NR access technology includes high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and access to multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency) -latency communications)). The wireless communication module 192 may support a high frequency band (eg, mmWave band) to achieve a high data rate, for example. The wireless communication module 192 uses various techniques for securing performance in a high-frequency band, for example, beamforming, massive multiple-input and multiple-output (MIMO), all-dimensional multiplexing. It may support technologies such as full dimensional MIMO (FD-MIMO), an array antenna, analog beam-forming, or a large scale antenna. The wireless communication module 192 may support various requirements defined in the electronic device 101 , an external electronic device (eg, the electronic device 104 ), or a network system (eg, the second network 199 ). According to an embodiment, the wireless communication module 192 may include a peak data rate (eg, 20 Gbps or more) for realizing eMBB, loss coverage (eg, 164 dB or less) for realizing mMTC, or U-plane latency for realizing URLLC ( Example: Downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) can be supported.

The antenna module 197 may transmit or receive a signal or power to the outside (eg, an external electronic device). According to an embodiment, the antenna module 197 may include an antenna including a conductor formed on a substrate (eg, a PCB) or a radiator formed of a conductive pattern. According to an embodiment, the antenna module 197 may include a plurality of antennas (eg, an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is connected from the plurality of antennas by, for example, the communication module 190 . can be selected. A signal or power may be transmitted or received between the communication module 190 and an external electronic device through the selected at least one antenna. According to some embodiments, other components (eg, a radio frequency integrated circuit (RFIC)) other than the radiator may be additionally formed as a part of the antenna module 197 .

According to various embodiments, the antenna module 197 may form a mmWave antenna module. According to one embodiment, the mmWave antenna module comprises a printed circuit board, an RFIC disposed on or adjacent to a first side (eg, bottom side) of the printed circuit board and capable of supporting a designated high frequency band (eg, mmWave band); and a plurality of antennas (eg, an array antenna) disposed on or adjacent to a second side (eg, top or side) of the printed circuit board and capable of transmitting or receiving signals of the designated high frequency band. can do.

At least some of the components are connected to each other through a communication method between peripheral devices (eg, a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and a signal ( e.g. commands or data) can be exchanged with each other.

According to an embodiment, the command or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199 . Each of the external

electronic devices

102 or 104 may be the same as or different from the electronic device 101 . According to an embodiment, all or a part of operations executed in the electronic device 101 may be executed in one or more external

electronic devices

102 , 104 , or 108 . For example, when the electronic device 101 needs to perform a function or service automatically or in response to a request from a user or other device, the electronic device 101 may perform the function or service itself instead of executing the function or service itself. Alternatively or additionally, one or more external electronic devices may be requested to perform at least a part of the function or the service. One or more external electronic devices that have received the request may execute at least a part of the requested function or service, or an additional function or service related to the request, and transmit a result of the execution to the electronic device 101 . The electronic device 101 may process the result as it is or additionally and provide it as at least a part of a response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device 101 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device 104 may include an Internet of things (IoT) device. The server 108 may be an intelligent server using machine learning and/or neural networks. According to an embodiment, the external electronic device 104 or the server 108 may be included in the second network 199 . The electronic device 101 may be applied to an intelligent service (eg, smart home, smart city, smart car, or health care) based on 5G communication technology and IoT-related technology.

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 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 of which 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 simply be used 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).

Various embodiments of the present document include one or more instructions stored in a storage medium (eg, internal memory 136 or external memory 138) readable by a machine (eg, electronic device 101). may be implemented as software (eg, the program 140) including For example, the processor (eg, the processor 120 ) of the device (eg, the electronic device 101 ) may call at least one of the one or more instructions stored from the storage medium and execute it. This makes it possible for the device to be operated to perform at least one function according to the called at least one command. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' only means that the storage medium is a tangible device and does not contain a signal (eg, electromagnetic wave), and this term is used in cases where data is semi-permanently stored in the storage medium and It does not distinguish between temporary storage cases.

According to one embodiment, the method according to various embodiments disclosed in this document may be provided as included in a computer program product. Computer program products may be traded between sellers and buyers as commodities. The computer program product is distributed in the form of a machine-readable storage medium (eg compact disc read only memory (CD-ROM)), or via an application store (eg Play Store ^TM ) or on two user devices ( It can be distributed (eg downloaded or uploaded) directly, online between smartphones (eg: smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium such as a memory of a server of a manufacturer, a server of an application store, or a memory of a relay server.

According to various embodiments, each component (eg, a module or a 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. have. 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.

2A illustrates an electrode assembly 200 including two cells according to an embodiment.

Referring to FIG. 2A , the electrode assembly 200 includes a positive electrode (not shown), a negative electrode (not shown), a separator 220 , and a positive electrode tab 231 (eg, a first positive electrode tab 231-1, a second positive electrode). It may include a tab 231 - 2 ), a negative electrode tab 232 (eg, a first negative electrode tab 232-1 and a second negative electrode tab 232 - 2 ), and a spacing member 241 . The positive electrode may include a positive electrode substrate and a positive electrode active material coated on at least one surface of the positive electrode substrate. The negative electrode may include a negative electrode substrate and an anode active material coated on at least one surface of the negative electrode substrate. Components included in the electrode assembly 200 may not be limited to those illustrated in FIG. 2A . For example, the electrode assembly 200 may include a binder or a conductive material applied to the positive electrode substrate and the negative electrode substrate.

According to an embodiment, the anode substrate may be formed of a metal that is a combination of aluminum, stainless steel, titanium, copper, silver, or a material selected from these. . The positive active material may be applied to the surface of the positive electrode substrate. For example, the positive electrode active material may be applied to one or both surfaces of the positive electrode substrate.

According to an embodiment, the positive active material may be formed of a material capable of reversibly occluding and releasing lithium ions. For example, the positive active material is lithium cobalt oxide, lithium nickel oxide, lithium nickel cobalt oxide, lithium nickel cobalt aluminum oxide, nickel lithium transition metal oxides such as lithium nickel cobalt manganese oxide, lithium manganese oxide and lithium iron phosphate, nickel sulfides, sulfides It may include at least one material selected from the group consisting of copper sulfides, sulfur, iron oxides, and vanadium oxides.

According to an embodiment, a binder (not shown) and a carbon additive (not shown) may be further applied to the surface of the cathode substrate in addition to the cathode active material. The conductive material may refer to fine powdered carbon added in a small amount to improve conductivity between particles of an active material or to a metal current collector in the electrode and prevent the binder from acting as an insulator.

According to one embodiment, the binder is polyvinylidene fluoride (polyvinylidene fluoride), vinylidene fluoride / hexafluoropropylene copolymer (vinylidene fluoride / hexafluoropropylene copolymer), vinylidene fluoride / tetrafluoroethylin copolymer ( Polyvinylidene fluoride-containing binders such as vinylidene fluoride/tetrafluoroethylene copolymer, sodium-carboxymethyl cellulose, lithium-carboxymethyl cellulose, etc. carboxymethyl cellulose-containing binders, polyacrylic acid, lithium-polyacrylic acid, acrylic, polyacrylonitrile, polymethyl methacrylate ), acrylate-containing binders such as polybutylacrylate), polyimide-imides, polytetrafluoroethylene, polyethylene oxide, polypyrrole (polypyrrole), lithium-Nafion, and at least one material selected from the group consisting of styrene butadiene rubber-containing polymers.

According to an embodiment, the conductive material is a carbon-containing conducting agent such as carbon black, carbon fiber and graphite, and a conductive fiber such as metal powder. fiber), carbon fluoride powder, metal powders such as zinc oxides and nickel powder, zinc oxides and conductive whiskers such as potassium titanate ), conductive metal oxides such as titanium oxides, and conductive polymers such as polyphenylene derivatives may include at least one material selected from the group consisting of.

According to an embodiment, the negative electrode substrate may be formed of at least one metal selected from the group consisting of copper, stainless steel, nickel, aluminum, and titanium. The negative active material may be applied to the surface of the negative electrode substrate. For example, the negative active material may be applied to one or both surfaces of the negative electrode substrate.

According to an embodiment, the anode active material may be formed of a material capable of forming an alloy together with lithium or a material capable of reversibly intercalating and deintercalating lithium. For example, the anode active material may include at least one material selected from the group consisting of metals, carbon-containing materials, metal oxides, and lithium metal nitrides. have.

According to one embodiment, the metal is lithium, silicon, magnesium, calcium, aluminum, germanium, tin, lead, arsenic ( arsenic), antimony, bismuth, silver, gold, zinc, cadmium, mercury, copper, iron, nickel ( nickel), cobalt (cobalt), and indium (indium) may include at least one material selected from the group consisting of.

According to an embodiment, the carbon-based material is graphite, graphite carbon fiber, coke, mesocarbon microbeads (MCMBS), polyacene, pitch-based carbon. It may include at least one material selected from the group consisting of a pitch-derived carbon fiber and a hard carbon.

According to an embodiment, the metal oxide is lithium titanium oxides, titanium oxides, molybdenum oxides, niobium oxides, iron oxides, tungsten oxides ), including at least one selected from the group consisting of tin oxides, amorphous tin oxide composites, silicon monoxide, cobalt oxides and nickel oxides can do.

According to an embodiment, a binder and a conductive material may be further applied to the surface of the anode substrate in addition to the anode active material. The binder and the conductive material may be the same as or similar to the binder and the conductive material applied to the positive electrode substrate.

According to an embodiment, the separator 220 may be disposed between the anode substrate and the cathode substrate, and may insulate the anode substrate and the cathode substrate from each other. For example, the separator 220 may be formed of a porous polymer membrane such as polyethylene or polypropylene membrane.

According to an embodiment, the spacing member 241 may be disposed between two electrode substrates positioned at the same height. For example, the spacing member 241 may be disposed between two electrode substrates (eg, positive electrode substrates or negative electrode substrates) positioned at a first height of the electrode assembly 200 .

According to an embodiment, the spacing member 241 may be formed of a flame retardant made of acrylic, silicone double-sided tape, or oriented polystyrene (OPS). The spacing member 241 may block heat transfer between two electrode substrates positioned at the same height.

According to an embodiment, the electrode assembly 200 may include a positive electrode tab 231 and a negative electrode tab 232 on each of the two electrode substrates spaced apart through the spacing member 241 . The positive electrode tab 231 and the negative electrode tab 232 may form a pair and be disposed on each of the plurality of electrode substrates physically and/or electrically separated through the spacing member 241 . For example, the electrode assembly 200 may include a first positive electrode substrate (eg, the first positive electrode of FIG. 2C ) spaced apart through the spacing member 241 (eg, the first spacing member 241-1 of FIG. 2C ). a first positive electrode tab 231-1 and a first negative electrode tab 232-1 and It may include a second positive electrode tab 231 - 2 and a second negative electrode tab 232 - 2 . For another example, the electrode assembly 200 may include a second negative electrode substrate (eg, the first electrode assembly of FIG. 2C ) spaced apart through the spacing member 241 (eg, the second spacing member 241 - 2 of FIG. 2C ). The first positive electrode tab 231-1 and the first negative electrode tab 232-1 are respectively disposed on the negative electrode substrate 212-1) and the second negative electrode substrate (eg, the second negative electrode substrate 212-2 of FIG. 2C). and a second positive electrode tab 231 - 2 and a second negative electrode tab 232 - 2 .

FIG. 2B illustrates a battery 201 surrounding the electrode assembly 200 shown in FIG. 2A with a pouch 230 according to an exemplary embodiment.

Referring to FIG. 2B , the battery 201 may include an electrode assembly (eg, the electrode assembly 200 of FIG. 2A ) and a pouch 230 . The electrode assembly 200 may be accommodated in the pouch 230 to form the battery 201 .

According to an embodiment, a positive electrode tab (eg, the first positive electrode tab 231-1, the second positive electrode tab 231-2) and a negative electrode tab (eg, the first negative electrode tab 232-1, the second negative electrode) A portion of the tab 232 - 2 may be exposed to the outside of the pouch 230 .

2C and 2D are cross-sectional views taken along line A-A' of the battery 201 shown in FIG. 2B according to an embodiment.

Referring to FIG. 2C , the battery 201 may include an electrode assembly (eg, the electrode assembly 200 of FIG. 2A ) and a pouch 230 . The electrode assembly may include an anode layer 251 , a cathode layer 252 , and a separator 220 disposed between the anode layer 251 and the cathode layer 252 .

According to an embodiment, the anode layer 251 may include at least one anode. For example, the anode layer 251 may include a first anode 251-1 and a second anode 251-2. The positive electrode may include a positive electrode substrate (eg, a first positive electrode substrate 211-1 and a second positive electrode substrate 211-2) and a coating layer of a positive electrode active material applied to both surfaces of the positive electrode substrate. For example, the first positive electrode 251-1 may include a first positive electrode substrate 211-1 and a coating layer of a positive electrode active material applied to both surfaces of the first positive electrode substrate 211-1. As another example, the second positive electrode 251 - 2 may include a coating layer of a positive electrode active material applied to both surfaces of the second positive electrode substrate 211 - 2 and the second positive electrode substrate 211 - 2 .

According to an embodiment, the negative electrode layer 252 may include at least one negative electrode. For example, the negative electrode layer 252 may include a first negative electrode 252-1 and a second negative electrode 252-2. The negative electrode may include a negative electrode substrate (eg, the first negative electrode substrate 212-1 and the second negative electrode substrate 212-2) and a coating layer of the negative electrode active material applied to both surfaces of the negative electrode substrate. For example, the first negative electrode 252-1 may include a coating layer of a negative active material applied to both surfaces of the first negative substrate 212-1 and the first negative substrate 212-1. As another example, the second negative electrode 252 - 2 may include a coating layer of a negative active material applied to both surfaces of the second negative substrate 212 - 2 and the second negative substrate 212 - 2 .

According to an embodiment, the pouch 230 may include a first pouch 230 - 1 and a second pouch 230 - 2 . The first pouch 230 - 1 may be adhered to one surface of the electrode assembly, and the second pouch 230 - 2 may be adhered to the other surface of the electrode assembly. For example, the first pouch 230-1 may be adhered to one surface of the separator 220 disposed at the top of the electrode assembly. For another example, the second pouch 230 - 2 may be adhered to one surface of the separator 220 disposed at the lowermost end of the electrode assembly.

According to an embodiment, the anode layer 251 and the first cathode 252-1 and the second cathode ( The negative electrode layers 252 corresponding to the layers 252 - 2 are arranged side by side may be alternately stacked along the first direction to form an electrode assembly (eg, the electrode assembly 200 of FIG. 2A ). .

According to an embodiment, the anode layer 251 includes a first anode 251-1, a first spacing member 241-1, and a second anode 251 in a second direction perpendicular to the first direction. -2) may be included.

According to an embodiment, the negative electrode layer 252 may include a first negative electrode 252-1, a second spacing member 241-2, and a second negative electrode 252-2 along the second direction. can

According to an embodiment, a length of the anode in the second direction may be shorter than a length of the cathode in the second direction. The length in the second direction may mean a width. For example, a length of the first anode 251-1 in the second direction may be shorter than a length of the first cathode 252-1 in the second direction. A length of the second anode 251 - 2 in the second direction may be shorter than a length of the second cathode 252 - 2 in the second direction.

According to an embodiment, the length of the anode substrate in the second direction may be shorter than the length of the cathode substrate in the second direction. For example, a length of the first anode substrate 211-1 in the second direction may be shorter than a length of the first cathode substrate 212-1 in the second direction. A length of the second anode substrate 211 - 2 in the second direction may be shorter than a length of the second cathode substrate 212 - 2 in the second direction.

According to an embodiment, the plurality of spacing members (eg, the first spacing member 241-1 and the second spacing member 241-2) stacked along the first direction may include an electrode layer (eg, the first spacing member 241 - 2 ). : Between a plurality of electrodes disposed on the anode layer 251 and the cathode layer 252 (eg, between the first anode 251-1 and the second anode 251-2 and the first cathode 252-1) ) and the second cathode 252-2) may be physically and/or electrically separated.

According to an embodiment, the plurality of spacing members (eg, the first spacing member 241-1 and the second spacing member 241-2) stacked in the first direction are substantially in size. may be the same. For example, the height and width of the first gap maintaining member 241-1 disposed between the first anode substrate 211-1 and the second anode substrate 211-2 positioned at a first height are the first The height and width of the first spacing member 241-1 disposed between the first anode substrate 211-1 and the second anode substrate 211-2 positioned higher or lower than the height may be substantially the same as the height and width of the first anode substrate 211-2. can The height may mean a length in the first direction, and the width may mean a length in the second direction.

According to an embodiment, the height of the plurality of spacing members (eg, the first spacing member 241-1 and the second spacing member 241-2) is a positive electrode substrate (eg, a first positive electrode substrate ( 211-1), the height of the second anode substrate 211-2) and the height of the coating layer of the cathode active material applied to both surfaces of the cathode substrate, or the height of the cathode substrate (eg, the first cathode substrate 212-1) ), the height of the second anode substrate 212-2) and the height of the coating layer of the anode active material applied to both surfaces of the cathode substrate may be substantially equal to or greater than the sum of the heights.

According to an embodiment, the height of the first spacing member 241-1 may be substantially the same as the height of the first positive electrode 251-1 or the height of the second positive electrode 251-2. The second spacing member 241 - 2 may be substantially equal to the height of the first negative electrode 252-1 or the height of the second negative electrode 252 - 2 .

According to an embodiment, the heights of the plurality of anodes 251-1 and 251-2 disposed on the anode layer 251 may be substantially the same. For example, the height of the first anode 251-1 may be substantially the same as the height of the second anode 251-2. The heights of the plurality of cathodes 252-1 and 252-2 disposed on the cathode layer 252 may be substantially the same. For example, the height of the first cathode 252-1 may be substantially the same as the height of the second cathode 252-2.

According to an embodiment, when the battery 201 is viewed from the outside of the battery 201 in a second direction opposite to the first direction, the plurality of spacing members (eg, the first spacing member 241 ) -1), the second spacing members 242 - 2) may be stacked to overlap each other. For example, the plurality of spacing members (eg, the first spacing member 241-1 and the second spacing member 241-2) may be stacked along a first axis facing the first direction. have.

According to an embodiment, the first spacing member 241-1 is spaced apart from the first anode substrate 211-1 and the first anode 251-1 by a predetermined distance, and the second anode substrate 211-2 ) and the second anode 251-2 may be spaced apart from each other by a predetermined distance and disposed between the first anode 251-1 and the second anode 251-2.

According to an embodiment, the second spacing member 241 - 2 includes the first negative electrode substrate 212-1 or the first negative electrode 252-1, and the second negative electrode substrate 212-2 or the second negative electrode. It may be disposed between the first cathode substrate 212-1 and the second cathode substrate 212-2 by being adjacent to or in contact with 252-2 at the same time.

Referring to FIG. 2D , the first spacing member 241-1 includes a first anode substrate 211-1 or a first anode 251-1, and a second cathode substrate 211-2 or a second anode. It may be disposed between the first anode substrate 211-1 and the second anode substrate 211-2 by being adjacent to or in contact with 251-2 at the same time.

According to an embodiment, the electronic device 101 may include a battery 201 . The battery 201 includes a positive electrode layer, a negative electrode layer, and a separator 220 disposed between the positive electrode layer and the negative electrode layer, wherein the positive electrode layer and the negative electrode layer are alternately stacked in a first direction. The electrode assembly 200 and a pouch 230 surrounding the electrode assembly 200 may be included. The anode layer may include a first anode 251-1, a first spacing member 241-1, and a second anode 251-1 in a second direction perpendicular to the first direction. . The negative electrode layer may include a first negative electrode 252-1, a second spacing member 241-2, and a second negative electrode 252-2 in the second direction.

According to an embodiment, the first spacing member 241-1 and the second spacing member 241-2 may be formed of a flame retardant.

According to an embodiment, the flame retardant may be made of one of acrylic, silicone double-sided tape, or oriented polystyrene (OPS).

According to an embodiment, a center of the first anode 251-1 and a center of the first cathode 252-1 may be disposed on a first axis parallel to the first direction. A center of the second anode 251 - 2 and a center of the second cathode 252 - 2 may be disposed on a second axis parallel to the first direction.

According to an embodiment, a center of the first spacing member 241-1 and a center of the second spacing member 241-2 may be disposed on a third axis parallel to the first direction.

According to an embodiment, the third axis is between the first anode 251-1 and the second anode 251-2, and between the first cathode 252-1 and the second cathode 252-2. ) can be located between

According to an embodiment, a length of the first anode 251-1 in the second direction may be substantially the same as a length of the second anode 251-2 in the second direction. A length of the first cathode 252-1 in the second direction may be substantially the same as a length of the second cathode 252-2 in the second direction.

According to an embodiment, a length of the first anode 251-1 in the second direction may be shorter than a length of the first cathode 252-1 in the second direction. A length of the second anode 251 - 2 in the second direction may be shorter than a length of the second cathode 252 - 2 in the second direction.

According to an embodiment, the first anode 251-1 and the second anode 251-2 may be disposed to be spaced apart from the first spacing member 241-1, and the first cathode ( 252-1) and the second negative electrode 252-2 may be disposed adjacent to the second spacing member 241-2.

According to an embodiment, the first anode 251-1 and the second anode 251-2 may be disposed adjacent to the first spacing member 241-1, and the first cathode ( 252-1) and the second negative electrode 252-2 may be disposed adjacent to the second spacing member 241-2.

According to an embodiment, a length of the first spacing member 241-1 in the first direction may be substantially the same as a length of the anode layer in the first direction. A length of the second spacing member 241 - 2 in the first direction may be substantially the same as a length of the negative electrode layer in the first direction.

According to an embodiment, the first anode 251-1 includes a first anode substrate, the second anode 251-2 includes a second anode substrate, and the first anode substrate and the second anode substrate The positive electrode substrate may include a positive electrode active material applied to one or both surfaces of the first positive electrode substrate and the second positive electrode substrate. The first cathode 252-1 comprises a first cathode substrate, the second cathode 252-2 comprises a second cathode substrate, and the first cathode substrate and the second cathode substrate are the first cathode substrates. It may include a negative active material applied to one or both surfaces of the first negative electrode substrate and the second negative electrode substrate.

According to an embodiment, the electronic device 101 may include a battery 201 . The battery 201 includes a positive electrode layer, a negative electrode layer, and a separator 220 disposed between the positive electrode layer and the negative electrode layer, wherein the positive electrode layer and the negative electrode layer are alternately stacked in a first direction. The formed electrode assembly 200 may include a pouch 230 surrounding the electrode assembly 200 . The anode layer may include a first anode 251-1 in a second direction perpendicular to the first direction and a second anode 251-2 spaced apart from the first anode 251-1. . The negative electrode layer may include a first negative electrode 252-1 and a second negative electrode 252-2 spaced apart from the first negative electrode 252-1 in the second direction.

According to an embodiment, a center of the first anode 251-1 and a center of the first cathode 251-2 may be disposed on a first axis parallel to the first direction, and the second anode may be disposed on a first axis parallel to the first direction. A center of 251 - 2 and a center of the second cathode 252 - 2 may be disposed on a second axis parallel to the first direction.

According to an embodiment, the electronic device 101 includes a first spacing member 241-1 disposed between the first anode 251-1 and the second anode 251-2, and the first A second spacing member 241 - 2 disposed between the negative electrode 252-1 and the second negative electrode 252 - 2 may be included.

3A illustrates an electrode assembly 300 including three cells according to an embodiment.

Hereinafter, content overlapping with the content described with reference to FIG. 2A will be omitted.

Referring to FIG. 3A , the electrode assembly 300 includes a positive electrode (not shown), a negative electrode (not shown), a separator 220 , and a positive electrode tab 231 (eg, a first positive electrode tab 231-1, a second positive electrode). tab 231-2, third positive electrode tab 231-3), negative electrode tab 232 (eg, first negative electrode tab 232-1, second negative electrode tab 232-2, third negative electrode tab) (232-3)) and

spacing members

241 and 242 may be included. The positive electrode may include a positive electrode substrate and a coating layer of a positive electrode active material applied to at least one surface of the positive electrode substrate. The negative electrode may include a negative electrode substrate and a coating layer of a negative active material applied to at least one surface of the negative electrode substrate. Components included in the electrode assembly 300 may not be limited to those illustrated in FIG. 3A . For example, the electrode assembly 300 may include a binder or a conductive material applied to the positive electrode substrate and the negative electrode substrate.

According to an embodiment, the spacing

members

241 and 242 may be respectively disposed between three electrode substrates (or electrodes) positioned at the same height. For example, the spacing member 241 may be disposed between the first anode substrate 211-1 and the second cathode substrate 211-2 positioned at a first height of the electrode assembly 300 . As another example, the spacing member 241 may be disposed between the first negative electrode substrate 212-1 and the second negative electrode substrate 212-2 positioned at a first height of the electrode assembly 300 . As another example, the spacing member 242 may be disposed between the second anode substrate 211 - 2 and the third anode substrate 211-3 positioned at a first height of the electrode assembly 300 . As another example, the spacing member 242 may be disposed between the second negative electrode substrate 211 - 2 and the third negative electrode substrate 212 - 3 positioned at a first height of the electrode assembly 300 .

According to an embodiment, the spacing

members

241 and 242 may block heat transfer between three electrode substrates (or electrodes) positioned at the same height.

According to an embodiment, the electrode assembly 300 may include an electrode tab on each of the three electrode substrates spaced apart (or separated) through the spacing

members

241 and 242 . For example, the first positive electrode substrate 211-1 includes a first positive electrode tab 231-1, the second positive electrode substrate 211-2 includes a second positive electrode tab 231-2, The third anode substrate 211-3 may include a third cathode tab 231-3. As another example, the first negative electrode substrate 212-1 includes a first negative electrode tab 232-1, the second negative electrode substrate 212-2 includes a second negative electrode tab 231-2, and , the third negative electrode substrate 212 - 3 may include a third negative electrode tab 232 - 3 .

FIG. 3B illustrates a battery 301 in which the electrode assembly 300 of FIG. 3B is surrounded by a pouch 230 according to an embodiment.

Referring to Fig. 3B, the battery 301 may include an electrode assembly (eg, the electrode assembly 300 of Fig. 3A and the pouch 230. The electrode assembly 300 is accommodated in the pouch 230, the battery ( 230) can be formed.

According to an embodiment, a positive electrode tab (eg, the first positive electrode tab 231-1, the second positive electrode tab 231-2, and the third positive electrode tab 231-3) and the negative electrode tab (eg, the first negative electrode) A portion of the tab 232-1, the second negative electrode tab 232-2, and the third negative electrode tab 232-3) may be exposed to the outside of the pouch 230.

3C is a cross-sectional view taken along line B-B' of the battery 301 shown in FIG. 3B according to an embodiment.

Referring to FIG. 3C , the battery 301 may include an electrode assembly (eg, the electrode assembly 300 of FIG. 3A ) and a pouch 230 . The electrode assembly may include an anode layer 251 , a cathode layer 252 , and a separator 220 disposed between the anode layer 251 and the cathode layer 252 .

According to an embodiment, the anode layer 251 may include at least one anode. For example, the anode layer 251 may include a first anode 251-1, a second anode 251-2, and a third anode 251-3. The first positive electrode 251-1 may include a first positive electrode substrate (not shown) and a coating layer of a positive electrode active material applied to both surfaces of the first positive electrode substrate. The second positive electrode 251 - 2 may include a second positive electrode substrate (not shown) and a coating layer of a positive electrode active material applied to both surfaces of the second positive electrode substrate. The third positive electrode 251-3 may include a third positive electrode substrate (not shown) and a coating layer of a positive electrode active material applied to both surfaces of the third positive electrode substrate.

According to an embodiment, the negative electrode layer 252 may include at least one negative electrode. For example, the negative electrode layer 252 may include a first negative electrode 252-1, a second negative electrode 252-2, and a third negative electrode 252-3. The first negative electrode 252-1 may include a first negative electrode substrate (not shown) and a coating layer of a negative active material applied to both surfaces of the first negative electrode substrate. The second negative electrode 252 - 2 may include a second negative electrode substrate (not shown) and a coating layer of a negative active material applied to both surfaces of the second negative electrode substrate. The third negative electrode 252 - 3 may include a third negative electrode substrate (not shown) and a coating layer of a negative active material applied to both surfaces of the third negative electrode substrate.

According to an embodiment, the pouch 230 may include a first pouch 230 - 1 and a second pouch 230 - 2 . The first pouch 230-1 may be adhered to one surface of the separator 220 disposed at the top of the electrode assembly. For another example, the second pouch 230 - 2 may be disposed on one surface of the separator 220 disposed at the lowermost end of the electrode assembly.

According to an embodiment, the anode layer 251 and the first cathode corresponding to a layer in which the first anode 251-1, the second anode 251-2, and the third anode 251-3 are arranged side by side The negative electrode layers 252 corresponding to the layers 252-1, the second negative electrode 252-2, and the third negative electrode 252-3 arranged side by side are alternately stacked in the first direction to form an electrode assembly. (eg, the electrode assembly 300 of FIG. 3A ) may be formed.

According to an embodiment, the anode layer 251 includes a first anode 251-1, a first spacing member 241-1, and a second anode 251- in a second direction perpendicular to the first direction. 2), a third spacing member 242-1, and a third anode 251-3 may be included.

According to an embodiment, a length of the anode in the second direction may be shorter than a length of the cathode in the second direction. The length in the second direction may mean a width. For example, the width of the first anode 251-1 may be smaller than the width of the first cathode 252-1. The width of the second anode 251 - 2 may be smaller than the width of the second cathode 252 - 2 . The width of the third anode 251-3 may be smaller than the width of the third cathode 252-3.

According to an embodiment, although not shown, the length of the anode substrate in the second direction may be shorter than the length of the cathode substrate in the second direction. For example, the width of the first anode substrate may be smaller than the width of the second cathode substrate. As another example, the width of the second anode substrate may be smaller than the width of the second cathode substrate. A width of the third anode substrate may be smaller than a width of the third cathode substrate.

According to an embodiment, the plurality of spacing members (eg, the first spacing member 241-1 and the second spacing member 241-2) stacked along the first direction may include an electrode layer (eg, the first spacing member 241 - 2 ). : Between the plurality of electrodes disposed on the anode layer 251 and the cathode layer 252 (eg, between the first anode 251-1 and the second anode 251-2, the second anode 251-2) ) and the third anode 251-3, between the first cathode 252-1 and the second cathode 252-2, and between the second cathode 252-2 and the third cathode substrate 252-3. ) can be physically and/or electrically isolated.

According to an embodiment, the plurality of spacing members 241-1, 241-2, 242-1, and 242-2 stacked in the first direction may have substantially the same size.

According to an embodiment, the height of the plurality of spacing members 241-1, 241-2, 242-1, and 242-2 may be substantially the same as the height of the positive electrode or the negative electrode. Although not shown, the positive electrode may include a coating layer of a positive electrode active material applied to both surfaces of the positive electrode substrate and the positive electrode substrate, and the negative electrode includes a coating layer of the negative electrode active material applied to both surfaces of the negative electrode substrate and the negative electrode substrate can do. For example, the height of the plurality of spacing members 241-1, 241-2, 242-1, and 242-2 is the height of the positive electrode substrate and the height of the coating layer of the active material applied to both surfaces of the positive electrode substrate. The total height or the height of the negative electrode substrate and the height of the negative electrode active material applied to both surfaces of the negative electrode substrate may be substantially equal to or greater than the total height.

According to an embodiment, the height of the first spacing member 241-1 and the third spacing member 242-1 is the first positive electrode 251-1, the second positive electrode 251-2, and the third The height of the anode 251-3 may be substantially the same. For another example, the heights of the second spacing member 241 - 2 and the fourth spacing member 242 - 2 are the first negative electrode 252-1 , the second negative electrode 252 - 2 , and the third negative electrode. may be substantially equal to the height of (252-3).

According to an embodiment, the heights of the plurality of anodes 251-1, 251-2, and 251-3 disposed on the anode layer 251 may be substantially the same. For example, the height of the first anode 251-1 may be substantially equal to the height of the second anode 251-2 and the height of the third anode 251-3. The heights of the plurality of cathodes 252-1, 252-2, and 252-3 disposed on the cathode layer 252 may be substantially the same. For example, the height of the first cathode 252-1 may be substantially the same as the height of the second cathode 252-2 and the height of the third cathode 252-3.

According to an embodiment, when the battery 301 is viewed from the outside of the battery 301 in a second direction opposite to the first direction, the plurality of spacing members 241-1, 241-2, 242 -1 and 242-2) may be stacked to overlap each other. For example, the plurality of spacing members (eg, the first spacing member 241-1 and the second spacing member 241-2) may be stacked along a first axis facing the first direction. have. As another example, the plurality of spacing members (eg, the third spacing member 242-1 and the fourth spacing member 242-2) may be stacked along a second axis facing the first direction. can

According to an embodiment, the first spacing member 241-1 is spaced apart from the first positive electrode 251-1 by a predetermined distance and spaced apart from the second positive electrode 251-2 by a predetermined distance to the first positive electrode ( 251-1) and the second anode 251-2. The third spacing member 242-1 is spaced apart from the second positive electrode 251-2 and the third positive electrode 251-3 by a predetermined distance, and the second positive electrode 251-2 and the third positive electrode 251-3 are spaced apart from each other. ) can be placed between

According to an embodiment, the second gap maintaining member 242-1 is adjacent to or in contact with the first negative electrode 252-1 and the second negative electrode 252-2 at the same time to form the first negative electrode 212-1 and the second negative electrode 252-2. It may be disposed between the two cathodes 212 - 2 . The fourth spacing member 242 - 2 is adjacent to or in contact with the second negative electrode 252 - 2 and the third negative electrode 252 - 3 at the same time so that the second negative electrode 252 - 2 and the third negative electrode 252 - 3 are adjacent to each other. ) can be placed between

According to an embodiment, although not shown in FIG. 3C , similarly to the content described with reference to FIG. 2D , the first spacing member 241-1 and the third spacing member 242-1 are the anodes 251-1 and 251 . -2) and may be disposed adjacent to or in contact with. For example, the first spacing member 241-1 is adjacent to or in contact with the first positive electrode 251-1 and the second positive electrode 251-2 at the same time, so that the first positive electrode 251-1 and the second positive electrode 251-1 are contacted with each other. (251-2) can be placed between. For another example, the third spacing member 242-1 is adjacent to or in contact with the second anode 251-2 and the third anode 251-3 at the same time to form the second anode 251-2 and the third anode 251-2. It may be disposed between the anodes 251-3.

4A illustrates an electrode assembly 400 including two cells according to an embodiment.

Referring to FIG. 4A , the electrode assembly 400 includes a positive electrode (not shown), a negative electrode (not shown), a separator 220 , and a positive electrode tab 231 (eg, a first positive electrode tab 231-1, a second positive electrode). tab 231 - 2 ), and a negative electrode tab 232 (eg, a first negative electrode tab 232-1 and a second negative electrode tab 232 - 2 ). A portion of the separator 220 may have a first wrinkle pattern 441 . The positive electrode may include a positive electrode substrate and a coating layer of a positive electrode active material applied to at least one surface of the positive electrode substrate. The negative electrode may include a negative electrode substrate and a coating layer of a negative active material applied to at least one surface of the negative electrode substrate. Components included in the electrode assembly 400 may not be limited to those illustrated in FIG. 4A . For example, the electrode assembly 400 may include a binder or a conductive material applied to the positive electrode substrate and the negative electrode substrate.

According to an embodiment, the separator 220 may be in contact with another adjacent separator 220 between two electrode substrates positioned at a first height and between two electrode substrates positioned lower than the first height. can A first wrinkle pattern 441 may be formed by contacting the separator 220 and another separator 220 adjacent to the separator 220 .

4B is a cross-sectional view taken along line C-C' of the electrode assembly 400 shown in FIG. 4A according to an exemplary embodiment.

4B, the electrode assembly 400 has a first height 411, the anode layer 251, the cathode layer 252, a separator disposed between the anode layer 251 and the cathode layer 252 ( 220) may be included. Although not shown in FIG. 4B , the pouch may form a battery while enclosing the electrode assembly 400 .

According to an embodiment, the positive electrode layer 251 and the negative electrode layer 252 may be alternately stacked along the first direction to form the electrode assembly 400 .

According to an embodiment, the anode layer 251 is a second anode 251 spaced apart from the first anode 251-1 and the first anode substrate 251-1 in a second direction perpendicular to the first direction. -2) may be included.

According to an embodiment, the negative electrode layer 252 may include a first negative electrode 252-1 and a second negative electrode 252-2 spaced apart from the first negative electrode 252-1 in the second direction. have.

According to an embodiment, the first positive electrode 251-1 may include a first positive electrode substrate 211-1 and a coating layer of a positive electrode active material applied to both surfaces of the first positive electrode substrate 211-1. The second positive electrode 251 - 2 may include a second positive electrode substrate 211 - 2 and a coating layer of a positive electrode active material applied to both surfaces of the second positive electrode substrate 211 - 2 .

According to an embodiment, the first negative electrode 252-1 may include a coating layer of a negative active material applied to both surfaces of the first negative substrate 212-1 and the first negative substrate 212-1. The second negative electrode 252 - 2 may include a second negative electrode substrate 212 - 2 and a coating layer of a negative active material applied to both surfaces of the second negative electrode substrate 212 - 2 .

According to an embodiment, a length of the anode in the second direction may be shorter than a length of the cathode in the second direction. The length in the second direction may mean a width. For example, the width of the first anode 251-1 may be shorter than the width of the first cathode 252-1. The width of the second anode 251 - 2 may be shorter than the width of the second cathode 252 - 2 .

According to an embodiment, between the first anode 251-1 and the second anode 251-2 and between the first cathode 252-1 and the second cathode 252-2, the adjacent separator 220 ) may be in contact with each other to form a first wrinkle pattern 441 . A first wrinkle pattern 441 formed by contacting adjacent separators 220 is formed between a plurality of electrodes (eg, a first anode 251-1) disposed on an electrode layer (eg, an anode layer, a cathode layer) and between the second anode 252-2 and between the first cathode 252-1 and the second cathode 212-2) may be physically and/or electrically separated.

According to an embodiment, the first length corresponding to the unfolded state of the first separator positioned at the center of the first height 411 may include the unfolded second separator positioned at a point higher than the center of the first height 411 . The second length corresponding to the state and the third length corresponding to the unfolded state of the third separator positioned at a point lower than the center of the first height 411 may be shorter than the third length corresponding to the unfolded state.

According to an embodiment, the electronic device 101 may include a battery. The battery includes a positive electrode layer, a negative electrode layer, and a separator 220 disposed between the positive electrode layer and the negative electrode layer, and an electrode assembly formed by alternately stacking the positive electrode layer and the negative electrode layer in a first direction ( 400 ), and a pouch surrounding the electrode assembly 400 . The anode layer may include a first anode 251-1 in a second direction perpendicular to the first direction and a second anode 251-2 spaced apart from the first anode 251-1. . The negative electrode layer may include a first negative electrode 252-1 and a second negative electrode 252-2 spaced apart from the first negative electrode 252-1 in the second direction. The separator 220 is formed between the first positive electrode 251-1 and the second positive electrode 251-2, and between the first negative electrode 252-1 and the second negative electrode 252-2. , may be in contact with another adjacent separation membrane 220 . The electrode assembly 400 may have a first height 411 in the first direction. The first length corresponding to the unfolded state of the first separator positioned at the center of the first height 411 is a second length corresponding to the unfolded state of the second separator positioned at a point higher than the center of the first height and a third length corresponding to an unfolded state of a third separator positioned at a point lower than the center of the first height.

According to an embodiment, the first anode 251-1 includes a first anode substrate, the second anode includes a second anode substrate, and the first anode substrate and the second anode substrate are It may include a positive active material applied to one or both surfaces of the first positive electrode substrate and the second positive electrode substrate. The first cathode 252-1 comprises a first cathode substrate, the second cathode 252-2 comprises a second cathode substrate, and the first cathode substrate and the second cathode substrate are the first cathode substrates. It may include a negative active material applied to one or both surfaces of the first negative electrode substrate and the second negative electrode substrate.

5 is a cross-sectional view of an electrode assembly 500 including three cells according to an embodiment.

Hereinafter, content overlapping those described in FIG. 4B will be omitted, and unlike the electrode assembly 400 having the first pleat pattern 441 , the first pleat pattern 441 and the second pleat pattern 442 are provided. The electrode assembly 500 will be described.

According to one embodiment, the electrode assembly 500 has a first height 411, the positive electrode layer 251, the negative electrode layer 252, a separator disposed between the positive electrode layer 251 and the negative electrode layer 252 ( 220) may be included.

According to an embodiment, the anode layer 251 may include a first anode 251-1 and a second anode 251-spaced apart from the first anode 251-1 in a second direction perpendicular to the first direction. 2), and a third anode 251-3 spaced apart from the second anode 251-2.

According to an embodiment, the negative electrode layer 252 includes a first negative electrode 252-1, a second negative electrode 252-2 spaced apart from the first negative electrode 252-1, and a second negative electrode layer 252 in the second direction. A third negative electrode 252-3 spaced apart from the negative electrode 252-2 may be included.

According to an embodiment, the first positive electrode 251-1 may include a first positive electrode substrate (not shown) and a coating layer of a positive electrode active material applied to both surfaces of the first positive electrode substrate. The second positive electrode 251 - 2 may include a second positive electrode substrate (not shown) and a coating layer of a positive electrode active material applied to both surfaces of the second positive electrode substrate. The third positive electrode 251-3 may include a third positive electrode substrate (not shown) and a coating layer of a positive electrode active material applied to both surfaces of the third positive electrode substrate.

According to an embodiment, the first negative electrode 252-1 may include a first negative electrode substrate (not shown) and a coating layer of a negative active material applied to both surfaces of the first negative electrode substrate. The second negative electrode 252 - 2 may include a second negative electrode substrate (not shown) and a coating layer of a negative active material applied to both surfaces of the second negative electrode substrate. The third negative electrode 252 - 3 may include a third negative electrode substrate (not shown) and a coating layer of a negative active material applied to both surfaces of the third negative electrode substrate.

According to an embodiment, between the first anode 251-1 and the second anode 251-2 and between the first cathode 252-1 and the second cathode 252-2, the adjacent separator 220 ) may be in contact with each other to form a first wrinkle pattern 441 . Between the second positive electrode 251-2 and the third positive electrode 251-3 and between the second negative electrode 252-2 and the third negative electrode 252-3, the adjacent separators 220 are second wrinkled They may be in contact while forming a pattern 442 . A first wrinkle pattern 441 formed by contacting adjacent separators 220 is formed between a plurality of electrodes (eg, a first anode) disposed on an electrode layer (eg, the positive electrode layer 251 and the negative electrode layer 252 ). (between 251-1 and the second anode 251-2 and between the first cathode 252-1 and the second cathode 252-2) may be physically and/or electrically separated. A second wrinkle pattern 442 formed by contacting adjacent separators 220 is formed between a plurality of electrodes disposed on the electrode layers 251 and 252 (eg, the second anode substrate 211 - 2 and the third anode). between the substrates 212-3 and between the second cathode substrate 212-2 and the third cathode substrate 212-3) may be physically and/or electrically separated.

According to an embodiment, the first length corresponding to the unfolded state of the first separator positioned at the first height 411 is in the state in which the second separator positioned at a higher point than the center of the first height 411 is unfolded. The corresponding second length and the third length corresponding to the unfolded state of the third separator positioned at a point lower than the center of the first height 411 may be shorter than the third length.

Effects obtainable in the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art to which the present disclosure belongs from the description below. will be.

Methods according to the embodiments described in the claims or specifications of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored in the computer-readable storage medium are configured to be executable by one or more processors in an electronic device (device). One or more programs include instructions for causing an electronic device to execute methods according to embodiments described in a claim or specification of the present disclosure.

Such programs (software modules, software) include random access memory, non-volatile memory including flash memory, read only memory (ROM), electrically erasable programmable ROM (electrically erasable programmable read only memory, EEPROM), magnetic disc storage device, compact disc-ROM (CD-ROM), digital versatile discs (DVDs), or other It may be stored in an optical storage device or a magnetic cassette. Alternatively, it may be stored in a memory composed of a combination of some or all thereof. In addition, each configuration memory may be included in plurality.

In addition, the program is transmitted through a communication network consisting of a communication network such as the Internet, an intranet, a local area network (LAN), a wide area network (WAN), or a storage area network (SAN), or a combination thereof. It may be stored on an attachable storage device that can be accessed. Such a storage device may be connected to a device implementing an embodiment of the present disclosure through an external port. In addition, a separate storage device on the communication network may be connected to the device implementing the embodiment of the present disclosure.

In the specific embodiments of the present disclosure described above, components included in the disclosure are expressed in the singular or plural according to the specific embodiments presented. However, the singular or plural expression is appropriately selected for the context presented for convenience of description, and the present disclosure is not limited to the singular or plural component, and even if the component is expressed in plural, it is composed of a singular or singular. Even an expressed component may be composed of a plurality of components.

Meanwhile, although specific embodiments have been described in the detailed description of the present disclosure, various modifications are possible without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the described embodiments and should be defined by the claims described below as well as the claims and equivalents.

Claims

In an electronic device,

including a battery;

The battery is:

an electrode assembly comprising a positive electrode layer, a negative electrode layer, and a separator disposed between the positive electrode layer and the negative electrode layer, wherein the positive electrode layer and the negative electrode layer are alternately stacked in a first direction; and

a pouch surrounding the electrode assembly;

The anode layer includes a first anode, a first spacing member, and a second anode along a second direction perpendicular to the first direction,

and the cathode layer includes a first cathode, a second spacing member, and a second cathode along the second direction.
The method according to claim 1,

and the first spacing member and the second spacing member are made of a flame retardant.
3. The method according to claim 2,

The flame retardant is made of one of acrylic, silicone double-sided tape, or OPS (Oriented polystyrene), the electronic device.
The method according to claim 1,

A center of the first anode and a center of the first cathode are disposed on a first axis parallel to the first direction,

and a center of the second anode and a center of the second cathode are disposed on a second axis parallel to the first direction.
The method according to claim 1,

and a center of the first spacing member and a center of the second spacing member are disposed on a third axis parallel to the first direction.
6. The method of claim 5,

and the third axis is positioned between the first anode and the second anode, and between the first cathode and the second cathode.
The method according to claim 1,

a length of the first anode in the second direction is substantially equal to a length of the second anode in the second direction;

and a length of the first cathode in the second direction is substantially equal to a length of the second cathode in the second direction.
The method according to claim 1,

A length of the first anode in the second direction is shorter than a length of the first cathode in the second direction,

and a length of the second anode in the second direction is shorter than a length of the second cathode in the second direction.
The method according to claim 1,

The electronic device of claim 1, wherein the first anode and the second anode are disposed to be spaced apart from the first spacing member, and the first cathode and the second cathode are disposed adjacent to the second spacing member.
The method according to claim 1,

The first anode and the second anode are disposed adjacent to the first spacing member, and the first cathode and the second cathode are disposed adjacent to the second spacing member.
The method according to claim 1,

a length of the first spacing member in the first direction and a length of the anode layer in the first direction are substantially the same,

and a length of the second spacing member in the first direction and a length of the cathode layer in the first direction are substantially the same.
In an electronic device,

including a battery;

The battery is:

an electrode assembly comprising a positive electrode layer, a negative electrode layer, and a separator disposed between the positive electrode layer and the negative electrode layer, wherein the positive electrode layer and the negative electrode layer are alternately stacked in a first direction; and

a pouch surrounding the electrode assembly;

the anode layer includes a first anode and a second anode spaced apart from the first anode along a second direction perpendicular to the first direction;

the negative electrode layer includes a first negative electrode along the second direction and a second negative electrode spaced apart from the first negative electrode;

The separator is in contact with another adjacent separator between the first anode and the second anode, and between the first cathode and the second cathode,

The electrode assembly has a first height along the first direction,

The first length corresponding to the unfolded state of the first separator positioned at the center of the first height includes the second length and the second length corresponding to the unfolded state of the second separator positioned at a higher point than the center of the first height. An electronic device, which is formed to be shorter than a third length corresponding to a state in which the third separator positioned at a point lower than the center of one height is unfolded.
13. The method of claim 12,

a length of the first anode in the second direction is substantially equal to a length of the second anode in the second direction;

and a length of the first cathode in the second direction is substantially equal to a length of the second cathode in the second direction.
13. The method of claim 12,

A length of the first anode in the second direction is shorter than a length of the first cathode in the second direction,

and a length of the second anode in the second direction is shorter than a length of the second cathode in the second direction.
13. The method of claim 12,

The first anode includes a first anode substrate, the second anode includes a second anode substrate, and the first anode substrate and the second anode substrate are formed of the first anode substrate and the second anode substrate. a positive active material applied to one or both surfaces; and

The first cathode comprises a first cathode substrate, the second cathode comprises a second cathode substrate, and the first cathode substrate and the second cathode substrate are the first cathode substrate and the second cathode substrate. An electronic device comprising a negative active material applied to one or both surfaces.