Battery assembly and electronic device including same

Abstract

An electronic device according to an embodiment of the present disclosure relates to a battery assembly and an electronic device including same. The electronic device may include: a housing; and a battery assembly disposed in the housing and including a battery cell and a cover member disposed to surround at least a portion of the battery cell. The battery cell including a curved region on both sides may include: a positive electrode including a positive electrode current collector and positive electrode active material coating portions disposed on both surfaces of the positive electrode current collector; a negative electrode including a negative electrode current collector and negative electrode active material coating portions disposed on both surfaces of the negative electrode current collector; and a separator disposed between the positive electrode and the negative electrode. Among the positive electrode active material coating portions, a positive electrode active material coating portion disposed adjacent to the battery cell may include a first pattern portion which is located in the curved region and is a combination of a plurality of unit patterns which are at least partially engraved and repeat.

Description

Battery assembly and electronic device including same

[0001] One embodiment disclosed in this document relates to a battery assembly and an electronic device including the same.

[0002] Thanks to remarkable advancements in information and communication technology and semiconductor technology, the proliferation and use of various electronic devices is rapidly increasing. In particular, recent electronic devices are being developed to enable portable communication.

[0003] Electronic devices can refer to devices that perform specific functions according to the programs installed on them, ranging from home appliances to electronic organizers, portable multimedia players, mobile communication terminals, tablet PCs, audio / video devices, desktop / laptop computers, and car navigation systems. For example, these electronic devices can output stored information as audio or video. As the integration of electronic devices increases and ultra-high-speed, high-capacity wireless communication becomes more widespread, a single electronic device, such as a mobile communication terminal, can now be equipped with various functions. For example, in addition to communication functions, entertainment functions such as games, multimedia functions such as music / video playback, communication and security functions for mobile banking, and functions such as schedule management and electronic wallets are being integrated into a single electronic device. These electronic devices are becoming smaller so that users can conveniently carry them.

[0004] Portable electronic devices may include batteries for use in a variety of locations, independent of power supply requirements. Battery cells included in the batteries may be formed by stacking a positive electrode, a separator, and a negative electrode, and winding the cells into a jelly roll shape.

[0005] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above-described matters constitute prior art related to the present disclosure.

[0006] During the winding process of a jelly roll-shaped battery cell, the R section, which is the bending area, can cause the N / P inversion phenomenon, a phenomenon in which the N / P ratio decreases due to the positive electrode area becoming larger than the negative electrode area. The N / P inversion phenomenon can cause unintended side reactions, which can impair the performance and stability of the battery.

[0007] An electronic device according to one embodiment of the present disclosure may provide a battery assembly having a predetermined pattern formed on a positive electrode plate and / or a negative electrode plate to prevent an N / P reversal phenomenon in a bending region of a jelly roll battery cell.

[0008] An electronic device according to one embodiment of the present disclosure may include a battery assembly including a housing, a battery cell disposed within the housing, and a cover member disposed to surround at least a portion of the battery cell. The battery cell including curved regions (R1, R2) on both sides may include a positive electrode including a positive current collector and positive active material coating portions disposed on both sides of the positive current collector, a negative electrode including a negative current collector and negative active material coating portions disposed on both sides of the negative current collector, and a separator disposed between the positive electrode and the negative electrode. Among the positive active material coating portions, a positive active material coating portion disposed near the center of the battery cell may include a first pattern portion that is located in the curved region and is a combination of a plurality of unit patterns that are engraved and repeated at least in part.

[0009] A battery assembly according to one embodiment of the present disclosure may include a battery cell and a cover member arranged to surround at least a portion of the battery cell. The jellyroll type battery cell including curved regions on both sides may include a positive electrode including a positive current collector and positive active material coating portions arranged on both sides of the positive current collector, a negative electrode including a negative current collector and negative active material coating portions arranged on both sides of the negative current collector, and a separator arranged between the positive electrode and the negative electrode. Among the positive active material coating portions, a positive active material coating portion arranged near the center of the battery cell may include a first pattern portion that is located in the curved region and is a combination of a plurality of unit patterns that are at least partially engraved and repeated.

[0010] However, the problem to be solved in this disclosure is not limited to the problem mentioned above, and may be determined in various ways without departing from the spirit and scope of this disclosure.

[0011] An electronic device according to one embodiment of the present disclosure may include a battery having a predetermined pattern formed on a positive electrode plate or a negative electrode plate corresponding to a bending area.

[0012] An electronic device according to one embodiment of the present disclosure can provide a jelly roll battery with improved N / P ratio reversal phenomenon in a bending region.

[0013] An electronic device according to one embodiment of the present disclosure can provide a battery with improved impregnation.

[0014] An electronic device according to one embodiment of the present disclosure can provide a battery with improved performance and stability.

[0015] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure belongs from the description below.

[0016] FIG. 1 is a block diagram of an electronic device within a network environment according to one embodiment disclosed in this document.

[0017] FIG. 2 is a perspective view showing the front of an electronic device according to one embodiment disclosed in this document.

[0018] FIG. 3 is a perspective view showing the rear side of the electronic device illustrated in FIG. 2 according to one embodiment disclosed in this document.

[0019] FIG. 4A is a front exploded perspective view of the electronic device illustrated in FIG. 2, according to one embodiment disclosed in this document.

[0020] FIG. 4b is an exploded perspective view showing the rear side of the electronic device illustrated in FIG. 2, according to one embodiment disclosed in this document.

[0021] FIG. 5A is a view of a battery assembly viewed from one direction according to an embodiment of the present disclosure.

[0022] FIG. 5b is a perspective view of an electrode assembly according to an embodiment of the present disclosure.

[0023] FIG. 5c is a side view of an electrode assembly according to an embodiment of the present disclosure viewed from one direction.

[0024] FIG. 6 is a process flow diagram for manufacturing a positive electrode plate or a negative electrode plate having an etching pattern in a curved area according to one embodiment of the present disclosure.

[0025] FIG. 7 is a side view of a bending region of a battery cell according to one embodiment of the present disclosure.

[0026] FIG. 8 is a cross-sectional view illustrating a first pattern portion formed on a second positive electrode activation coating portion of a positive electrode plate according to one embodiment of the present disclosure.

[0027] FIG. 9a is a cross-sectional view of a bipolar plate according to one embodiment of the present disclosure viewed from one direction.

[0028] FIG. 9b is a cross-sectional view of a portion of a bipolar plate according to one embodiment of the present disclosure, viewed from one direction.

[0029] FIG. 10A is a cross-sectional view illustrating a first unit pattern according to one embodiment of the present disclosure.

[0030] FIG. 10b is a cross-sectional view illustrating a grid-like pattern in which a first unit pattern and a second unit pattern are combined according to one embodiment of the present disclosure.

[0031] FIG. 11 is a side view of a bending region of a battery cell according to one embodiment of the present disclosure.

[0032] FIG. 12 is a cross-sectional view illustrating a second pattern portion formed on a second cathode-activated coating portion of a cathode plate according to one embodiment of the present disclosure.

[0033] FIG. 13a is a cross-sectional view of a cathode plate viewed from one direction according to one embodiment of the present disclosure.

[0034] FIG. 13b is a cross-sectional view of a portion of a cathode plate according to one embodiment of the present disclosure, viewed from one direction.

[0035] FIG. 14a is a cross-sectional view illustrating a third unit pattern according to one embodiment of the present disclosure.

[0036] FIG. 14b is a cross-sectional view illustrating a grid-like pattern in which a third unit pattern and a fourth unit pattern are combined according to one embodiment of the present disclosure.

[0037] Electronic devices according to the embodiments disclosed in this document may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to the embodiments disclosed in this document are not limited to the aforementioned devices.

[0038] The embodiments of this document and the terminology used herein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, phrases such as "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 "at least one of A, B, or C" can each include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish the corresponding component from other corresponding components, and do not limit the corresponding components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as being "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0039] The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0040] According to one embodiment, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to one embodiment, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each 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 one embodiment, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0041] FIG. 1 is a block diagram of an electronic device within a network environment according to one embodiment disclosed in this document.

[0042] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with an electronic device (104) or a server (108) via a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In one embodiment, the electronic device (101) may have at least one of these components (e.g., the connection terminal (178)) omitted, or one or more other components added. In one embodiment, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0043] The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or calculations. According to one embodiment, as at least a part of the data processing or calculations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or a secondary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor)) that can operate independently or together therewith. For example, if the electronic device (101) includes a main processor (121) and a secondary processor (123), the secondary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a specified function. The secondary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0044] The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, in the electronic device (101) itself where artificial intelligence is performed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0045] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0046] 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).

[0047] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0048] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can 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. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0049] The display module (160) can visually provide information to an external device (e.g., a user) of the electronic device (101). The display module (160) may include, for example, a display, a hall area program device, or a projector and a control circuit for controlling the device. In one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0050] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

[0051] The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) can 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, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0052] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) with an external electronic device (e.g., the electronic device (102)). In one 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.

[0053] The connection terminal (178) may include a connector through which the electronic device (101) may be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0054] A haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. In one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0055] The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0056] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least a part of a power management integrated circuit (PMIC).

[0057] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0058] The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (194) (e.g., a local area network (LAN) communication module, or a power line communication module). Among these communication modules, the corresponding communication module can communicate with an external electronic device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0059] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), an external electronic device (e.g., the electronic device (104)), or a network system (e.g., the second network (199)). According to one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0060] The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module (197) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In one embodiment, the antenna module (197) may include a plurality of antennas (e.g., 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), may be selected from the plurality of antennas by, for example, the communication module (190). 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. In one embodiment, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (197).

[0061] In one embodiment, the antenna module (197) may form a mmWave antenna module. In one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.

[0062] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0063] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In one 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 a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0064] FIG. 2 is a perspective view showing the front of an electronic device according to one embodiment disclosed in this document.

[0065] FIG. 3 is a perspective view showing the rear side of the electronic device illustrated in FIG. 2 according to one embodiment disclosed in this document.

[0066] Referring to FIGS. 2 and 3, an electronic device (101) according to one embodiment (e.g., the electronic device (101) of FIG. 1) may include a housing (110) that includes a first side (or front side) (110A), a second side (or back side) (110B), and a side surface (110C) that surrounds a space between the first side (110A) and the second side (110B). In one embodiment (not shown), the housing (110) may also refer to a structure that forms a portion of the first side (110A) of FIG. 2, the second side (110B) of FIG. 3, and the side surface (110C).

[0067] In one embodiment, the first side (110A) may be formed by a front plate (102) that is at least partially substantially transparent (e.g., a glass plate or a polymer plate comprising various coating layers). The second side (110B) may be formed by a substantially opaque back plate (111). The back plate (111) may be formed of, for example, coated or colored glass, ceramic, polymer, metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination of at least two of the foregoing materials. The side surface (110C) may be formed by a side structure (or “side bezel structure”) (118) that is joined to the front plate (102) and the back plate (111) and comprises a metal and / or a polymer. In one embodiment, the back plate (111) and the side structure (118) may be formed integrally and comprise the same material (e.g., a metal material such as aluminum).

[0068] In one embodiment, the front plate (102) may include a seamlessly extending region(s) that curves toward the back plate (111) from at least a portion of an edge. For example, the front plate (102) (or the back plate (111)) may include only one of the curved extending regions toward the back plate (111) (or the front plate (102)) at one edge of the first side (110A). In one embodiment, the front plate (102) or the back plate (111) may be substantially flat, in which case it may not include a curved extending region. When the front plate (102) or the back plate (111) includes a curved extending region, the thickness of the electronic device (101) in the portion that includes the curved extending region may be smaller than the thickness of other portions.

[0069] According to one embodiment, the electronic device (101) may include at least one of a display (101), an audio module (e.g., a microphone hole (103), an external speaker hole (107), a call receiver hole (114)), a sensor module (e.g., a first sensor module (104), a second sensor module (not shown), a third sensor module (119)), a camera module (e.g., a first camera device (105), a second camera device (112), a flash (113)), a key input device (117), a light-emitting element (106), and a connector hole (e.g., a first connector hole (108), a second connector hole (109)). In one embodiment, the electronic device (101) may omit at least one of the components (e.g., the key input device (117) or the light-emitting element (106)) or may additionally include another component.

[0070] The display (101) may output a screen or be visually exposed, for example, through a significant portion of the first surface (110A) (e.g., the front plate (102)). In one embodiment, at least a portion of the display (101) may be visually exposed through the front plate (102) forming the first surface (110A) or through a portion of a side surface (110C). In one embodiment, the corners of the display (101) may be formed to be substantially the same as the adjacent outer shape of the front plate (102). In one embodiment (not shown), in order to expand the area where the display (101) is visually exposed, the gap between the outer edge of the display (101) and the outer edge of the front plate (102) may be formed to be substantially the same.

[0071] According to one embodiment, a recess or opening may be formed in a part of a screen display area of ​​the display (101), and at least one of an audio module (e.g., a call receiver hole (114)), a sensor module (e.g., a first sensor module (104)), a camera module (e.g., a first camera device (105)), and a light-emitting element (106) may be included that are aligned with the recess or opening. In one embodiment (not shown), at least one of an audio module (e.g., a call receiver hole (114)), a sensor module (e.g., a first sensor module (104)), a camera module (e.g., a first camera device (105)), a fingerprint sensor (not shown), and a light-emitting element (106) may be included on the back surface of the screen display area of ​​the display (101). In one embodiment (not shown), the display (101) may be coupled to or disposed adjacent to a touch sensing circuit, a pressure sensor capable of measuring the intensity (pressure) of a touch, and / or a digitizer that detects a magnetic field-type stylus pen.

[0072] According to one embodiment, the audio module (103, 107, 114) may include a microphone hole (103) and a speaker hole (e.g., an external speaker hole (107), a call receiver hole (114)). The microphone hole (103) may have a microphone disposed therein for acquiring external sound, and in one embodiment, multiple microphones may be disposed so as to detect the direction of the sound. The speaker hole may include an external speaker hole (107) and a call receiver hole (114). In one embodiment, the speaker hole (e.g., an external speaker hole (107), a call receiver hole (114)) and the microphone hole (103) may be implemented as a single hole, or a speaker may be included (e.g., a piezo speaker) without a speaker hole (e.g., an external speaker hole (107), a call receiver hole (114)).

[0073] According to one embodiment, the sensor module may generate an electrical signal or data value corresponding to an internal operating state of the electronic device (101) or an external environmental state. The sensor module may include, for example, a first sensor module (104) (e.g., a proximity sensor) and / or a second sensor module (not shown) (e.g., a fingerprint sensor) disposed on a first surface (110A) of the housing (110), and / or a third sensor module (119) disposed on a second surface (110B) of the housing (110). The second sensor module (not shown) (e.g., a fingerprint sensor) may be disposed on not only the first surface (110A) of the housing (110) (e.g., the display (101)), but also the second surface (110B) or the side surface (110C). The electronic device (101) may further include, for example, at least one of a gesture sensor, a gyro sensor, a pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor (104).

[0074] According to one embodiment, the camera module may include a first camera device (105) disposed on a first side (110A) of the electronic device (101), a second camera device (112) disposed on a second side (110B), and / or a flash (113). The camera devices (e.g., the first camera device (105), the second camera device (112)) may include one or more lenses, an image sensor, and / or an image signal processor. The flash (113) may include, for example, a light emitting diode or a xenon lamp. In one embodiment, one or more lenses (an infrared camera, a wide-angle lens, and a telephoto lens) and image sensors may be disposed on one side of the electronic device (101). In one embodiment, the flash (113) may emit infrared light, and the infrared light emitted by the flash (113) and reflected by the subject may be received through the third sensor module (119). The electronic device (101) or a processor of the electronic device (101) (e.g., the processor (120) of FIG. 1) may detect depth information of the subject based on the point in time when the infrared light is received by the third sensor module (119).

[0075] According to one embodiment, the key input device (117) may be disposed on a side surface (110C) of the housing (110). In one embodiment, the electronic device (101) may not include some or all of the above-mentioned key input devices (117), and the key input devices (117) that are not included may be implemented in other forms, such as soft keys, on the display (101). In one embodiment, the key input device may include a sensor module disposed on a second surface (110B) of the housing (110).

[0076] In one embodiment, the light-emitting element (106) may be disposed, for example, on the first surface (110A) of the housing (110). The light-emitting element (106) may provide, for example, status information of the electronic device (101) in the form of light. In one embodiment, the light-emitting element (106) may provide a light source that is linked to the operation of, for example, a camera module (e.g., the first camera device (105)). The light-emitting element (106) may include, for example, an LED, an IR LED, and a xenon lamp.

[0077] According to one embodiment, the connector hole (e.g., the first connector hole (108), the second connector hole (109)) may include a first connector hole (108) that can accommodate a connector (e.g., a USB connector) for transmitting and receiving power and / or data with an external electronic device (e.g., the electronic device (1002) of FIG. 1), and / or a second connector hole (e.g., an earphone jack) (109) that can accommodate a connector for transmitting and receiving audio signals with the external electronic device.

[0078] FIG. 4A is a front exploded perspective view of the electronic device illustrated in FIG. 2, according to one embodiment disclosed in this document.

[0079] FIG. 4b is an exploded perspective view showing the rear side of the electronic device illustrated in FIG. 2, according to one embodiment disclosed in this document.

[0080] Referring to FIGS. 4A and 4B , the electronic device (101) (e.g., the electronic device (101) of FIG. 1 , FIG. 2 , or FIG. 3 ) may include a side structure (210), a first support member (211) (e.g., a bracket), a front plate (220) (e.g., the front plate (102) of FIG. 2 ), a display (230) (e.g., the display (101) of FIGS. 2 and 3 ), a printed circuit board (or board assembly) (240), a battery (250), a second support member (260) (e.g., a rear case), an antenna, a camera assembly (207), and a rear plate (280) (e.g., the rear plate (111) of FIG. 3 ).

[0081] According to one embodiment, the electronic device (101) may omit at least one of the components (e.g., the first support member (211) or the second support member (260)) or may additionally include other components. At least one of the components of the electronic device (101) may be identical or similar to at least one of the components of the electronic device (101) of FIG. 2 or FIG. 3, and any redundant description will be omitted below.

[0082] According to one embodiment, the first support member (211) may be disposed inside the electronic device (101) and connected to the side structure (210) or may be formed integrally with the side structure (210). The first support member (211) may be formed of, for example, a metallic material and / or a non-metallic (e.g., a polymer) material. When formed at least partially of a metallic material, the side structure (210) or a portion of the first support member (211) may function as an antenna. The first support member (211) may have a display (230) coupled to one surface and a printed circuit board (240) coupled to the other surface. The printed circuit board (240) may be equipped with a processor (e.g., the processor (120) of FIG. 1), a memory (e.g., the memory (130) of FIG. 1), and / or an interface (e.g., the interface (177) of FIG. 1). The processor may include, for example, one or more of a central processing unit, an application processor, a graphics processing unit, an image signal processor, a sensor hub processor, or a communication processor.

[0083] In one embodiment, the first support member (211) and the side structure (210) may be combined to form a front case or housing (201). In one embodiment, the housing (201) may be generally understood as a structure for accommodating, protecting, or arranging a printed circuit board (240) or a battery (250). In one embodiment, the housing (201) may be understood as including structures that can be visually or tactilely perceived by a user in the appearance of the electronic device (101), for example, a side structure (210), a front plate (220), and / or a rear plate (280). In one embodiment, the 'front or rear side of the housing (201)' may mean the first side (110A) of FIG. 2 or the second side (110B) of FIG. 3. In one embodiment, the first support member (211) is positioned between the front plate (220) (e.g., the first side (110A) of FIG. 2) and the back plate (280) (e.g., the second side (110B) of FIG. 3) and may function as a structure for positioning electrical / electronic components such as a printed circuit board (240) or a camera assembly (207).

[0084] According to one embodiment, the display (230) may include a display panel (231) and a flexible printed circuit board (233) extending from the display panel (231). The flexible printed circuit board (233) may be understood to be electrically connected to the display panel (231) while being disposed, for example, at least partially on the rear surface of the display panel (231). In one embodiment, reference numeral '231' may be understood to be a protective sheet disposed on the rear surface of the display panel. For example, unless otherwise specified in the following detailed description, the protective sheet may be understood to be a part of the display panel (231). In one embodiment, the protective sheet may function as a buffer structure (e.g., a low-density elastomer such as a sponge) that absorbs external force or an electromagnetic shielding structure (e.g., a copper sheet (CU sheet)). According to one embodiment, the display (230) may be disposed on the inner surface of the front plate (220) and may output a screen through at least a portion of the first surface (110A) or the front plate (220) of FIG. 2 by including a light-emitting layer. As mentioned above, the display (230) may output a screen through substantially the entire area of ​​the first surface (110A) or the front plate (220) of FIG. 2.

[0085] According to one embodiment, the memory may include, for example, volatile memory or non-volatile memory.

[0086] According to one embodiment, the interface may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, and / or an audio interface. The interface may electrically or physically connect the electronic device (101) to an external electronic device, for example, and may include a USB connector, an SD card / MMC connector, or an audio connector.

[0087] According to one embodiment, the second support member (260) may include, for example, an upper support member (260a) and a lower support member (260b). In one embodiment, the upper support member (260a) may be arranged to surround a printed circuit board (240) together with a portion of the first support member (211). A circuit device implemented in the form of an integrated circuit chip (e.g., a processor, a communication module, or a memory) or various electrical / electronic components may be arranged on the printed circuit board (240), and according to an embodiment, the printed circuit board (240) may be provided with an electromagnetic shielding environment from the upper support member (260a). In one embodiment, the lower support member (260b) may be utilized as a structure on which electrical / electronic components such as a speaker module, an interface (e.g., a USB connector, an SD card / MMC connector, or an audio connector) may be arranged. In one embodiment, electrical / electronic components such as a speaker module, an interface (e.g., a USB connector, an SD card / MMC connector, or an audio connector) may be arranged on an additional printed circuit board (not shown). In this case, the lower support member (260b) may be arranged to surround the additional printed circuit board together with another part of the first support member (211). The speaker module or interface arranged on the additional printed circuit board (not shown) or the lower support member (260b) may be arranged corresponding to the audio module (e.g., the microphone hole (103) or the speaker hole (e.g., the external speaker hole (107), the call receiver hole (114))) or the connector hole (e.g., the first connector hole (108), the second connector hole (109)) of FIG. 2.

[0088] According to one embodiment, it can be positioned corresponding to the audio module (207) or connector hole (108, 109).

[0089] According to one embodiment, the battery (250) is a device for supplying power to at least one component of the electronic device (101), and may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. At least a portion of the battery (250) may be disposed substantially on the same plane as, for example, the printed circuit board (240). The battery (250) may be disposed integrally within the electronic device (101), or may be disposed detachably from the electronic device (101).

[0090] According to one embodiment, the electronic device (101) may further include a separate sub-circuit board (290) spaced apart from the printed circuit board (240) within the first support member (211). The sub-circuit board (290) may be electrically connected to the printed circuit board (240) via a connecting member such as a connecting flexible board or cable. The sub-circuit board (290) may be electrically connected to electrical components disposed in an end region of the electronic device (101), such as a battery (289) or a speaker, a USB connector, an antenna connector, and / or a SIM socket, to transmit signals and power.

[0091] Although not shown, the antenna may include a conductive pattern implemented on the surface of the second support member (260), for example, through a laser direct structuring process. In one embodiment, the antenna may include a printed circuit pattern formed on the surface of a thin film, and the thin film-type antenna may be disposed between the back plate (280) and the battery (250). The antenna may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and / or a magnetic secure transmission (MST) antenna. The antenna may, for example, perform short-range communication with an external device or wirelessly transmit and receive power required for charging. In one embodiment, another antenna structure may be formed by the side structure (210) and / or a portion or combination of the first support member (211).

[0092] In one embodiment, the camera assembly (207) may include at least one camera module. Within the electronic device (101), the camera assembly (207) may receive at least a portion of light incident through an optical hole or camera window (212, 213, 219). In one embodiment, the camera assembly (207) may be disposed on the first support member (211) at a location adjacent to the printed circuit board (240). In one embodiment, the camera module(s) of the camera assembly (207) may be generally aligned with one of the camera windows (212, 213, 219) and may be at least partially wrapped around the second support member (260) (e.g., the upper support member (260a)).

[0093] Below, the structure of the battery (250) is described in detail.

[0094] FIG. 5A is a view of a battery assembly (300) according to an embodiment of the present disclosure as viewed in one direction (e.g., in the z-axis direction).

[0095] FIG. 5b is a perspective view of an electrode assembly (305) according to an embodiment of the present disclosure.

[0096] FIG. 5c is a side view of an electrode assembly (305) according to an embodiment of the present disclosure viewed in one direction (e.g., in the y-axis direction).

[0097] According to one embodiment, an electronic device (e.g., an electronic device (101) of FIGS. 1 to 4) may include a housing (e.g., a housing (110) of FIGS. 1 and 2), a main circuit board (e.g., a printed circuit board (240) of FIGS. 4A and 4B) disposed within the housing (110), and a battery assembly (300).

[0098] The configuration of the battery assembly (300) of FIGS. 5A to 5C may be partially or entirely identical to the configuration of the battery (189) of FIG. 1 and / or the battery (250) of FIGS. 4A and 4B. The embodiments of FIGS. 5A to 5C may optionally be combined with the embodiments of FIGS. 4A to 4B. In one embodiment, an electronic device (e.g., the electronic device (101) of FIGS. 1 to 4) may include a housing (e.g., the housing (110) of FIGS. 1 and 2), a main circuit board (e.g., the printed circuit board (240) of FIGS. 4A and 4B) disposed within the housing (110), and a battery assembly (300).

[0099] According to one embodiment, the battery assembly (300) may power the processor (120), memory (130), input module (150), audio output module (155), audio module (170), sensor module (176), haptic module (179), and / or camera module (180) of the electronic device (101) disclosed in FIG. 1A.

[0100] According to one embodiment, the battery assembly (300) may include a cover member (301) and a battery cell (305). The cover member (301) may form an internal space for accommodating the battery cell (305). The cover member (301) may be implemented as, for example, a case (e.g., a can or a pouch) for accommodating the battery cell (305) therein. The cover member (301) may surround the battery cell (305) and seal the battery cell (305) from the outside.

[0101] According to one embodiment, the cover member (301) may include a material capable of responding to changes in the volume of the battery cell (305) corresponding to charging and discharging of the battery assembly (300). The cover member (301) may be formed of, for example, a metal such as aluminum or an aluminum alloy. The cover member (301) may also be formed by laminating, for example, layers of nylon, aluminum, and polypropylene.

[0102] According to one embodiment, the electrode assembly (305) may include a positive electrode plate (410), a first separator (420), a negative electrode plate (430), a second separator (440), a positive electrode tab (321) and / or a negative electrode tab (325).

[0103] According to one embodiment, the electrode assembly (305) may be positioned inside the pouch (401). The electrode assembly (305) may be positioned in the internal space of the pouch (401) and may be positioned together with the electrolyte through a process of being sealed after the electrolyte is injected.

[0104] According to one embodiment, the positive electrode plate (410), the first separator (420), the negative electrode plate (430), and the second separator (440) included in the electrode assembly (305) may be laminated and rolled. The positive electrode plate (410), the first separator (420), the negative electrode plate (430), and the second separator (440) included in the electrode assembly (305) may be overlapped and rolled. For example, the positive electrode plate (410), the first separator (420), the negative electrode plate (430), and the second separator (440) may be rolled and formed into a jelly roll shape.

[0105] According to one embodiment, when the positive electrode plate (410), the first separator (420), the negative electrode plate (430), and the second separator (440) are overlapped and wound, the electrode assembly (305) may be sequentially stacked and arranged from the outside with the positive electrode plate (410), the first separator (420), the negative electrode plate (430), and the second separator (440), and the positive electrode plate (410), the first separator (420), the negative electrode plate (430), and the second separator (440) may be repeatedly stacked and arranged in the inward direction of the second separator (440). In this case, the positive electrode plate (410), the first separator (420), the negative electrode plate (430), and the second separator (440) arranged in order from the outside may be referred to as a “first laminated structure,” and the positive electrode plate (410), the first separator (420), the negative electrode plate (430), and the second separator (440) arranged inward of the first laminated structure may be referred to as a “second laminated structure.” Without being limited to what is illustrated, when the electrode assembly (305) is repeatedly wound, the electrode assembly (305) may include at least one more laminated structure in addition to the first laminated structure and the second laminated structure.

[0106] According to one embodiment, based on the first laminated structure laminated at the outermost side in the electrode assembly (305) in a rolled state, the positive electrode plate (410) may be disposed at the outermost side of the electrode assembly (305). The first separator (420) included in the first laminated structure may be disposed on the inner side of the positive electrode plate (410) so as to be closer to the center (C) than the positive electrode plate (410). The negative electrode plate (430) included in the first laminated structure may be disposed on the inner side of the first separator (420) so as to be closer to the center (C) than the first separator (420). The second separator (440) included in the first laminated structure may be disposed on the inner side of the negative electrode plate (430) so as to be closer to the center (C) than the negative electrode plate (430). The positive electrode plate (410) and the negative electrode plate (430) may be insulated through the first separator (420).

[0107] According to one embodiment, the electrode assembly (305) of the battery assembly (300) can convert chemical energy of the positive electrode plate (410) and the negative electrode plate (430) into electrical energy. The electrode assembly (305) may have a positive electrode tab (321) and a negative electrode tab (325) spaced apart from each other at a center portion (C) (e.g., a core portion in the form of a jelly roll). The positive electrode tab (321) may be connected to a portion of the positive electrode plate (410). The negative electrode tab (325) may be connected to a portion of the negative electrode plate (430). At least a portion of the positive electrode tab (321) and the negative electrode tab (325) may be exposed to the outside of the pouch (301). Power may be supplied to, for example, a power management module (188) disclosed in FIG. 1 through the positive electrode tab (321) and the negative electrode tab (325).

[0108] In one embodiment, the positive electrode plate (410) may be an electrode through which electrons flow. Since a chemical reaction that loses electrons occurs on the positive electrode plate (410), it may be an electrode in which an oxidation reaction occurs. At least one surface of the positive electrode plate (410) may be coated with a positive electrode active material for positive electrode activity.

[0109] According to one embodiment, the negative electrode plate (430) may be an electrode through which electrons flow. Since a chemical reaction for obtaining electrons occurs at the negative electrode plate (430), it may be an electrode through which a reduction reaction occurs. At least one surface of the negative electrode plate (430) may be coated with a negative electrode active material for negative electrode activity. The positive electrode plate (410) and the negative electrode plate (430) may be interposed between the first separator (420) and generate current through a redox reaction.

[0110] According to one embodiment, the positive electrode plate (410) may include a plate or layer (e.g., aluminum foil) comprising a metal such as aluminum. The plate (or layer) may be understood as a positive electrode current collector for collecting current from the positive electrode. The plate included in the positive electrode plate (410) will be referred to as a first plate (e.g., the first plate (411) of FIG. 7). The negative electrode plate (430) may include a plate or layer (e.g., copper foil) comprising a metal such as copper. The plate (or layer) may be understood as a negative electrode current collector for collecting current from the negative electrode. The plate included in the negative electrode plate (430) will be referred to as a second plate (e.g., the second plate (431) of FIG. 11).

[0111] According to one embodiment, a cathode-activated coating portion (413, 415) coated with a cathode-activated material (e.g., the first cathode-activated coating portion (413) and the second cathode-activated coating portion (415) of FIG. 7) may be disposed on at least one surface of the first plate (411). The cathode-activated coating portions (413, 415) may include the first cathode-activated coating portion (413) and the second cathode-activated coating portion (415). Based on the first laminated structure of FIGS. 5b to 5c, the first cathode-activated coating portion (413) may be disposed on the outer surface of the first plate (411) when the battery cell (305) is wound. The second cathode-activated coating portion (415) may be disposed on the inner surface of the first plate (411) when the battery cell (305) is wound. For example, the second cathode-activated coating portion (415) may be positioned relatively closer to the center (C) of the battery cell (305) compared to the first cathode-activated coating portion (413).

[0112] According to one embodiment, a negative electrode activation coating portion (433, 435) coated with a negative electrode activation material may be disposed on at least one surface of the second plate (431). The negative electrode activation coating portion (433, 435) may include a first negative electrode activation coating portion (433) and a second negative electrode activation coating portion (435). The first negative electrode activation coating portion (433) may be disposed on an outer surface of the second plate (431) when the battery cell (305) is wound. The second negative electrode activation coating portion (435) may be disposed on an inner surface of the second plate (431) when the battery cell (305) is wound. For example, the second negative electrode activation coating portion (435) may be disposed relatively closer to the center (C) of the battery cell (305) compared to the first negative electrode activation coating portion (433).

[0113] According to one embodiment, a first separator (420) may be disposed between a positive electrode plate (410) and a negative electrode plate (430). The first separator (420) may be an insulating film that prevents the positive electrode plate (410) and the negative electrode plate (430) from contacting each other. The first separator (420) may insulate the positive electrode plate (410) and the negative electrode plate (430). The first separator (420) may prevent the positive electrode plate (410) and the negative electrode plate (430) from being short-circuited.

[0114] According to one embodiment, the first separator (420) and the second separator (440) may be formed of a porous polymer membrane such as polyethylene (PE) or polypropylene (PP).

[0115] According to one embodiment, the electrode assembly (305) may have a first outer surface (311a) and a second outer surface (311b) formed by a positive electrode plate (410) positioned at the outermost side. The electrode assembly (305) may have a first inner surface (300a) and a second inner surface (300b) formed by a second separator (440) positioned at the innermost side.

[0116] According to one embodiment, the battery cell (305) may have an upper end referred to as an upper end (331) and a lower end referred to as a lower end (341). As the battery cell (305) is wound, both sides of the side positioned between the upper end (331) and the lower end (341) may be bent, which may be referred to as bending regions (R1, R2) of the battery cell (305).

[0117] According to one embodiment, when the positive electrode plate (410), the first separator (420), the negative electrode plate (430), and the second separator (440) are sequentially laminated and rolled, curved regions (R1, R2) may be formed on both sides. The curved regions (R1, R2) formed on both sides may be referred to as "R sections." The curved regions (R1, R2) may include a first curved region (R1) and a second curved region (R2).

[0118] According to one embodiment, there may be a region in which the area of ​​the positive electrode plate (410) is relatively large with respect to the negative electrode plate (430) among the regions corresponding to the bending regions (R1, R2). Here, the value obtained by dividing the capacity of the negative electrode (negative electrode) by the capacity of the positive electrode (positive electrode) may be referred to as the N / P ratio. When the ratio of the positive electrode to the negative electrode decreases, the N / P ratio may decrease in the region, and this may be said to be an N / P inversion phenomenon. When the N / P inversion phenomenon occurs, lithium may be deposited on the surface of the negative electrode. When lithium is deposited, the electrolyte inside the battery may be depleted in the bending regions (R1, R2), which may deteriorate battery performance and stability.

[0119] In one embodiment, the occurrence of the N / P inversion phenomenon may result in unintended side reactions. In addition, since the bending regions (R1, R2) are packed at a relatively high pressure, the degree of electrolyte impregnation may be reduced, which may increase side reactions occurring in the bending regions (R1, R2). The side reactions may, for example, deteriorate battery performance and stability.

[0120] According to one embodiment, by etching a portion of the positive electrode active material coating portion (and / or the negative electrode active material coating portion) coated on one surface of the positive electrode plate (410) and / or the negative electrode plate (430) corresponding to the bending region (R1, R2) to form a predetermined negative pattern, the N / P inversion phenomenon can be prevented from occurring in the bending region (R1, R2).

[0121] According to one embodiment, by etching a portion of the positive electrode active material coating portion (and / or negative electrode active material coating portion) coated on one surface of the positive electrode plate (410) and / or the negative electrode plate (430) corresponding to the bending region (R1, R2) to form a predetermined negative pattern, the degree of impregnation of the electrolyte can be increased. For example, the positive electrode plate (410) (and / or negative electrode plate (410)) on which the predetermined negative pattern is formed has a relatively increased surface area in contact with the electrolyte, thereby increasing the degree of impregnation, or the degree of impregnation of the electrolyte can be increased by allowing the electrolyte to easily flow through a channel formed in the negative pattern in the positive electrode plate (410) (and / or negative electrode plate (410).

[0122] Hereinafter, a manufacturing process of a battery cell including a predetermined negative pattern formed in a curved area (R1, R2) of the positive electrode active material coating portion (negative electrode active material coating portion) will be described with reference to FIG. 6.

[0123] FIG. 6 is a process flow diagram for manufacturing a positive electrode plate (e.g., positive electrode plate (410) of FIG. 5c) or a negative electrode plate (e.g., negative electrode plate (430) of FIG. 5c) having an etching pattern in a curved area according to one embodiment of the present disclosure. Hereinafter, for convenience of explanation, the description will focus on the positive electrode plate (410), and the same can be applied to the manufacturing process of the negative electrode plate (430).

[0124] Referring to FIG. 6, in process 610, a mixing process for mixing a positive electrode active material and a solvent may be performed. In the mixing process, a binder may be added to increase the adhesion between particles of the positive electrode active material. For example, polyvinylidene fluoride (PVDF) may be used as the binder. When manufacturing the binder, n-methyl-2-pyrrolidone (NMP) may be used as a solvent in PVDF. In the mixing process, a conductive agent may be added to adjust the gap between the active materials. The positive electrode active material, solvent, binder, and conductive agent may be mixed to form a positive electrode slurry.

[0125] According to one embodiment, in process 620, a coating process may be performed to coat a positive electrode slurry on a plate (e.g., the first plate (411) of FIG. 7). The positive electrode slurry may be applied to at least one surface of the first plate (411). For example, the positive electrode slurry may be applied to one surface and / or the back surface of the first plate (411) to a predetermined thickness.

[0126] According to one embodiment, in process 630, a rolling process may be performed to roll the positive electrode slurry of the first plate (411) using a roll press. The positive electrode slurry applied to one side and / or the back side of the first plate (411) may be rolled to a predetermined thickness. When the battery cell (305) is wound, the positive electrode slurry disposed on the outside of the first plate (411) will be referred to as a first positive electrode active material coating portion (413), and the positive electrode slurry disposed on the inside of the first plate (411) will be referred to as a second positive electrode active material coating portion (415).

[0127] According to one embodiment, in process 640, an etching process may be performed to form a predetermined engraved pattern on the second positive electrode active material coating portion (415) disposed on the inside of the first plate (411) when winding the battery cell (305), or to form a predetermined engraved pattern on the second negative electrode active material coating portion (435) disposed on the inside of the second plate (431) when winding the battery cell (305). Through the etching process, the positive electrode active material and the conductive material included in the second positive electrode active material coating portion (415) may be physically detached by irradiating a binder (e.g., PVDF) with a light source (e.g., laser) having a predetermined wavelength. The device irradiating the light source may irradiate, for example, an optical fiber laser such as a Yb fiber laser. The predetermined wavelength may range from 300 nm to 10700 nm, for example. In the etching process, the intensity of the light source used and the time for which the light source is irradiated may differ depending on the type of light source, the wavelength of the light source, and the type of binder included in the positive electrode active material (or negative electrode active material).

[0128] According to one embodiment, a pattern portion (e.g., the first pattern portion (700) of FIG. 7 and / or the second pattern portion (700) of FIG. 11) may be formed in a predetermined area of ​​the second positive electrode active material coating portion (415) of the positive electrode plate (410) and the second negative electrode active material coating portion (435) of the negative electrode plate (430). The predetermined area may correspond, for example, to an area that is bent when a jelly roll-shaped battery cell (305) is wound (e.g., a bending area (R1, R2) of FIG. 5c).

[0129] For example, the pattern portion (500, 700) may be formed by repeating a plurality of unit patterns (e.g., the first unit pattern (501) of FIG. 8 or the second unit pattern (701) of FIG. 12). The unit patterns (501, 701) may have a predetermined width and depth, and may be arranged with a predetermined interval between the unit patterns.

[0130] In one embodiment, the etching process may include a cleaning process to remove the cathode active material (or anode active material) delaminated by the etching. A brush or air may be used to remove the delaminated material.

[0131] According to one embodiment, in process 650, a slitting process may be performed. Through the slitting process, the electrode may be cut to fit the battery specifications. In addition, after the slitting process, a notching process may be performed to form a positive electrode tab (e.g., a positive electrode tab (321) of FIG. 5b) and a negative electrode tab (e.g., a negative electrode tab (325) of FIG. 5b).

[0132] According to one embodiment, the positive electrode, negative electrode, and separator manufactured through processes 610 to 650 are repeatedly laminated in the order of positive electrode plate (410) - first separator (420) - negative electrode plate (430) - second separator (440), and then a jelly roll battery cell (305) can be manufactured through a winding method.

[0133] FIG. 7 is a side view of the bending region (R1, R2) of the battery cell (305) according to one embodiment of the present disclosure. FIG. 6 may be understood as illustrating a portion of the first bending region (R1) of FIG. 5c.

[0134] Fig. 8 is a cross-sectional view illustrating a first pattern portion (500) formed on a second positive electrode activation coating portion (415) of a positive electrode plate (410) according to one embodiment of the present disclosure. Fig. 8 may be understood as a cross-sectional view of the positive electrode plate (410) illustrated in Fig. 7 in a flat state before being wound. Hereinafter, for convenience of explanation, the description will be centered on the first bending region (R1), but the same may be applied to the second bending region (R2).

[0135] The embodiment of FIG. 8 can be optionally combined with the embodiments of FIGS. 5a to 5c and FIG. 7.

[0136] Referring to FIG. 7, a first pattern portion (500) may be positioned on a second positive electrode activation coating portion (415) of a positive electrode plate (410) corresponding to a bending region (R1, R2). The pattern portion (500) may be formed by repeating a predetermined unit pattern (e.g., the unit pattern (501) of FIG. 8).

[0137] According to one embodiment, the first pattern portion (500) is formed on the second cathode-activated coating portion (415) located inwardly of the battery cell (305) in the bending region (R1, R2), thereby preventing the phenomenon of the N / P ratio being reversed in the bending region (R1, R2). As a result, side reactions (e.g., lithium precipitation) that may occur due to the N / P reverse phenomenon in the bending region (R1, R2) can be minimized, thereby improving battery performance and stability.

[0138] According to one embodiment, by forming the first pattern portion (500) on the second positive electrode activation coating portion (415) instead of forming the first pattern portion (500) on the first positive electrode activation coating portion (413), process simplification and cost reduction can be achieved, and reduction in energy density of the battery cell (305) can be minimized.

[0139] According to one embodiment, a second pattern portion (700) (e.g., the second pattern portion (700) of FIG. 11) may be formed on a second negative electrode activation coating portion (435) located in the inner direction of the battery cell (305) in the bending region (R1, R2). The second pattern portion (700) formed on the second negative electrode activation coating portion (435) will be described below with reference to FIG. 11.

[0140] Referring to FIG. 8, the direction in which the positive electrode plate (410) in a flat state extends to the right may be referred to as a “first direction (d1),” and the thickness direction of the positive electrode plate (410) may be referred to as a “third direction (d3).” The first direction (d1) may be substantially the same as the direction in which the positive electrode plate (410) is wound when the battery cell (305) is wound, and the third direction (d3) may be substantially the same as the direction toward the center (C) of the battery cell (305) when the battery cell (305) is wound. The first direction (d1) may be referred to as the length direction of the positive electrode plate (410) (or the negative electrode plate (430)), and the third direction (d3) may be referred to as the depth direction of the positive electrode plate (410) (or the negative electrode plate (430)).

[0141] According to one embodiment, the first pattern portion (500) may be configured by repeating unit patterns (501). The unit patterns (501) may be formed by removing at least a portion of the second anodic activation coating portion (415) by an etching process (e.g., the etching process (640) of FIG. 6).

[0142] According to one embodiment, the unit pattern (501) may have a predetermined width in a first direction (d1) and a predetermined depth in a third direction (d3). The predetermined width of the unit pattern (501) will be referred to as a “first width (w1),” and the predetermined depth of the unit pattern (501) will be referred to as a “first depth (h1).” The first width (w1) may be, for example, a length in a range of 50 um (micrometer) to 200 um. The first depth (h1) may be, for example, a length in a range of 5 um to 30 um.

[0143] According to one embodiment, unit patterns (501) and adjacent unit patterns (501) may be spaced apart by a predetermined distance. The predetermined distance spaced apart between adjacent unit patterns (501) will be referred to as a "first distance (l1)." The first distance (l1) may be, for example, a length in the range of 0.5 mm to 5 mm.

[0144] According to one embodiment, the characteristics of the battery cell (305) (e.g., energy density or immersion degree of the battery cell (305)) may be determined by the first width (w1), the first depth (h1) of the unit pattern (501) and / or the first spacing (l1) between adjacent unit patterns (501). For example, the energy density of the battery cell (305) may decrease in response to an increase in the first width (w1) and / or the first depth (h1).

[0145] According to one embodiment, the degree of impregnation of the battery cell (305) may increase in response to an increase in the first width (w1) and / or the first depth (h1). As the first width (w1) and / or the first depth (h1) increases, the degree of impregnation may increase because the surface area where the electrolyte comes into contact with the positive electrode plate (410) increases. In addition, as the first width (w1) and / or the first depth (h1) increases, the width and depth of a channel through which the electrolyte can easily flow in the positive electrode plate (410) increase, so that the degree of impregnation may increase.

[0146] In one embodiment, the energy density of the battery cell (305) may increase in response to an increase in the first gap (l1). For example, the degree of impregnation of the battery cell (305) may decrease in response to an increase in the first gap (l1). Accordingly, the first width (w1), the first depth (h1), and / or the first gap (l1) may be determined in consideration of minimizing a decrease in the energy density of the battery cell (305) while simultaneously maximizing the degree of impregnation.

[0147] FIG. 9a is a cross-sectional view of a bipolar plate (410) viewed from one direction according to one embodiment of the present disclosure.

[0148] FIG. 9b is a cross-sectional view of a portion of a bipolar plate (410) viewed from one direction according to one embodiment of the present disclosure.

[0149] It can be understood that Fig. 9a illustrates a state in which a positive electrode plate (410) is unfolded when the positive electrode plate (410) is wound once to form a battery cell (305), and Fig. 9b illustrates a state in which a positive electrode plate (410) is unfolded when the positive electrode plate (410) is wound multiple times to form a battery cell (305).

[0150] Referring to FIGS. 9A and 9B, a cross-sectional view of a positive electrode plate (410) formed by sequentially stacking a first positive electrode activation coating portion (e.g., the first positive electrode activation coating portion (413) of FIG. 8), a first plate (411) (e.g., the first plate (411) of FIG. 8), and a second positive electrode activation coating portion (415) may be understood as a cross-sectional view viewed from above. Hereinafter, a first direction (d1) (e.g., the first direction (d1) of FIG. 8) may be understood as a horizontal direction of the positive electrode plate (410) before the positive electrode plate (410) is wound, and a second direction (d2) may be understood as a vertical direction of the positive electrode plate (410) before the positive electrode plate (410) is wound. The second direction (d2) may be referred to as a width direction of the positive electrode plate (410). The third direction (d3) (e.g., the third direction (d3) of FIG. 8) can be understood as the thickness direction of the positive electrode plate (410). Before the positive electrode plate (410) is wound, the first to third directions (d1, d2, d3) can be arranged perpendicular to each other.

[0151] According to one embodiment, the bipolar plate (410) can be wound along the first direction (d1).

[0152] According to one embodiment, the first pattern portion (500) may be arranged in a repeating manner as the bipolar plate (410) extends in the first direction (d1). The first pattern portion (500) may be arranged in a repeating manner as a plurality of unit patterns (e.g., the unit pattern (501) of FIG. 8).

[0153] According to one embodiment, as the positive electrode plate (410), the first separator (420) (e.g., the first separator (420) of FIG. 7), the negative electrode plate (430) (e.g., the negative electrode plate (430) of FIG. 7), and the second separator (440) (e.g., the second separator (440) of FIG. 7) are wound to form a battery cell (e.g., the battery cell (305) of FIG. 5b), the first pattern portion (500) may be formed in a curved area of ​​the positive electrode plate (410) (e.g., the first curved area (R1) and / or the second curved area (R2) of FIG. 5c).

[0154] Although not shown, as the battery cell (305) is wound, the area of ​​the outer-positioned bending region (R1, R2) may be relatively larger than the area of ​​the inner-positioned bending region (R1, R2). Accordingly, the area of ​​the outer-positioned first pattern portion (500) among the plurality of first pattern portions (500) may be relatively larger than the area of ​​the inner-positioned first pattern portion (500).

[0155] In one embodiment, as the battery cell (305) is wound, the width of the first pattern portion (500) may increase.

[0156] For example, in FIG. 9a, if the first pattern portion (500) located on the left is referred to as the 1-1 pattern portion (500-1) (e.g., the first pattern portion (500) of FIG. 8) and the first pattern portion (500) located on the right is referred to as the 1-2 pattern portion (500-2) (e.g., the first pattern portion (500) of FIG. 8), the horizontal length (r1) of the 1-1 pattern portion (500-1) may be relatively shorter than the horizontal length (r1') of the 1-2 pattern portion (500-2).

[0157] For example, in FIG. 9b, if the first pattern portions (500) located in the d1 direction from the left are sequentially referred to as the 1-1 pattern portion (500-1), the 1-2 pattern portion (500-2), and the 1-3 pattern portion (500-3), the horizontal length (r11) of the 1-1 pattern portion (500-1) may be relatively shorter than the horizontal length (r12) of the 1-2 pattern portion (500-2), and the horizontal length (r12) of the 1-2 pattern portion (500-2) may be relatively shorter than the horizontal length (r13) of the 1-3 pattern portion (500-3).

[0158] According to one embodiment, as the battery cell (305) is wound multiple times, the distance between adjacent first pattern portions (500) may increase. For example, in FIG. 9b, if the distance between the 1-1 pattern portion (500-1) and the 1-2 pattern portion (500-2) adjacent to the right side of the 1-1 pattern portion (500-1) is "p11", and the distance between the 1-2 pattern portion (500-2) and the 1-3 pattern portion (500-3) adjacent to the right side of the 1-2 pattern portion (500-2) is "p12", then p11 <p12의 관계를 만족할 수 있다.

[0159] According to one embodiment, the unit pattern (501) may be implemented as a linear first unit pattern (e.g., the first unit pattern (501a) of FIG. 10a or the first unit pattern (501b) of FIG. 10b), or may be implemented as a combination of a second unit pattern (e.g., the second unit pattern (501c) of FIG. 10b) that is substantially vertically arranged with the first unit pattern (501b).

[0160] Regarding the first unit pattern (501a, 501b) and the second unit pattern (501c), this will be described in FIGS. 10a and 10b.

[0161] FIG. 10a is a cross-sectional view illustrating a first unit pattern (501a) according to one embodiment of the present disclosure.

[0162] FIG. 10b is a cross-sectional view illustrating a grid-like pattern in which a first unit pattern (501b) and a second unit pattern (501c) are combined according to one embodiment of the present disclosure.

[0163] FIGS. 10A and 10B may be understood as enlarged views of the first pattern portion (500) of FIGS. 9A and 9B (e.g., any one of the 1-1 pattern portion (500-1), the 1-2 pattern portion (500-2), or the 1-3 pattern portion (500-3), and the embodiments of FIGS. 10A and 10B may be optionally combined with the embodiments of FIGS. 8, 9A, and 9B. For example, the unit pattern (501) illustrated in FIG. 8 may include the first unit pattern (501a) of FIG. 10A, or may include the first unit pattern (501b) and the second unit pattern (501c) of FIG. 10B.

[0164] Referring to FIG. 10a, the first pattern portion (500) may be formed by repeatedly arranging a plurality of first unit patterns (501a). The first unit patterns (501a) may be arranged substantially parallel to the second direction (d2), and the plurality of first unit patterns (501a) may be spaced apart at a predetermined interval in the first direction (d1). The first unit pattern (501a) may have a first width (w1) (e.g., the first width (w1) of FIG. 8). The first width (w1) may be, for example, a length in the range of 50 um to 200 um. Two adjacent first unit patterns (501a) among the plurality of first unit patterns (501a) may be spaced apart at a first interval (l1) (e.g., the first interval (l1) of FIG. 8). The first interval (l1) may be, for example, a length in the range of 0.5 mm to 5 mm. Although not shown, the first unit pattern (501a) may have a predetermined depth in the third direction (d3). The predetermined depth may be a first depth (e.g., the first depth (h1) of FIG. 8). The first depth (h1) may be, for example, a length in the range of 5 um to 30 um. By changing at least one of the first width (w1), the first interval (l1), and the first depth (h1) of the first unit pattern (501a), the first pattern portion (500) of various shapes may be formed.

[0165] According to one embodiment, the first unit pattern (501a) can be formed by removing at least a portion of the second anode-activated coating portion (e.g., the second anode-activated coating portion (415) of FIG. 7). The first unit pattern (501a) can be formed by etching at least a portion of the second anode-activated coating portion (415) by a light source having a predetermined wavelength (e.g., a laser).

[0166] Referring to FIG. 10b, the first pattern portion (500) may be formed by repeatedly arranging first unit patterns (501b) (e.g., the first unit pattern (501a) of FIG. 10a). The first pattern portion (500) may include a first unit pattern (501b) and a second unit pattern (501c). The first unit pattern (501b) may be arranged substantially parallel to the second direction (d2), and a plurality of first unit patterns (501b) may be spaced apart at a predetermined interval in the first direction (d1). The second unit pattern (501c) may be arranged substantially parallel to the first direction (d1), and a plurality of second unit patterns (501c) may be spaced apart at a predetermined interval in the second direction (d2). The second unit pattern (501c) may be arranged substantially perpendicular to the first unit pattern (501b). A plurality of first unit patterns (501b) and a plurality of second unit patterns (501c) can intersect to form a grid-shaped pattern.

[0167] According to one embodiment, the first unit pattern (501b) may have a first-first width (w11) (e.g., the first width (w1) of FIG. 8). The first-first width (w11) may be, for example, a length in the range of 50 μm to 200 μm. Two adjacent first unit patterns (501b) among the plurality of first unit patterns (501b) may be spaced apart by a first-first interval (l11) (e.g., the first interval (l1) of FIG. 8). The first-first interval (l11) may be, for example, a length in the range of 0.5 mm to 5 mm.

[0168] According to one embodiment, the second unit pattern (501c) may have a first-second width (w12) (e.g., the first width (w1) of FIG. 8). The first-first width (w11) may be, for example, a length in the range of 50 μm to 200 μm. Two adjacent second unit patterns (501c) among the plurality of second unit patterns (501c) may be spaced apart by a first-second interval (l12) (e.g., the first interval (l1) of FIG. 8). The first-second interval (l12) may be, for example, a length in the range of 0.5 mm to 5 mm.

[0169] Although not shown, the first unit pattern (501b) and the second unit pattern (501c) may have a predetermined depth in the third direction (d3). The predetermined depth may be a first depth (e.g., the first depth (h1) of FIG. 8). The first depth (h1) may be, for example, a length in the range of 5 um to 30 um.

[0170] According to one embodiment, various combinations of first pattern portions (500) can be formed by changing at least one of the first width (w1), the first interval (l1), and the first depth (h1) of the first unit pattern (501b) and the second unit pattern (501c).

[0171] According to one embodiment, the first unit pattern (501b) and the second unit pattern (501c) can be formed by removing at least a portion of the second anode-activated coating portion (e.g., the second anode-activated coating portion (415) of FIG. 7). The first unit pattern (501b) and the second unit pattern (501c) can be formed by etching at least a portion of the second anode-activated coating portion (415) by a light source having a predetermined wavelength (e.g., a laser).

[0172] Although not shown, when the positive electrode plate (410) is wound once or multiple times to form a battery cell (305) (e.g., battery cell (305) of FIG. 5b), it may include a first pattern portion (500) to which different unit patterns are applied corresponding to the bending region (e.g., bending region (R1, R2) of FIG. 5c). For example, in the first curved region (R1), the positive electrode plate (410) may include a first pattern portion (500) to which a first pattern shape (e.g., a first unit pattern (501a) having a linear shape) is applied, and in the second curved region (R2), the positive electrode plate (410) may include a first pattern portion (500) to which a second pattern shape (e.g., a first unit pattern (501b) and a second unit pattern (501c) having a grid shape) is applied. In various embodiments, the first pattern shape and the second pattern shape may be formed with the same pattern. As another example, in the first curved region (R1), the positive electrode plate (410) may include a first pattern portion (500-1) to which a first unit pattern (501a) having a linear shape is applied. In a curved region different from the first curved region (R1) (e.g., R2, R3 (not shown)), the positive electrode plate (410) may include a first unit pattern having a linear shape. It may include a first pattern portion (e.g., 500-2, 500-3) to which a pattern (501b) is applied. Two adjacent first unit patterns (501a) among a plurality of first unit patterns (501a) may be spaced apart by a 1-1 interval (l1). The 1-1 interval (l1) may be, for example, a length in the range of 0.5 mm to 5 mm. Two adjacent first unit patterns (501b) among a plurality of first unit patterns (501b) may be spaced apart by a 1-1 interval (l11). The 1-1 interval (l11) may be, for example, a length in the range of 0.5 mm to 5 mm.

[0173] In addition, although not shown, when the positive electrode plate (410) is wound once or multiple times to form a battery cell (305), it may include a first pattern portion (500) in which the width of the unit pattern, the depth of the unit pattern, and the spacing between the unit patterns are applied differently corresponding to the bending areas (R1, R2). For example, the first pattern portion (500) may be composed of only the first unit pattern (501a) (e.g., the first pattern portion (500) of FIG. 10a), or may be composed of a combination of the first unit pattern (501b) and the second unit pattern (501c) (e.g., the first pattern portion (500) of FIG. 10b), or may be composed of a combination of unit patterns of various patterns (not shown). For example, the first pattern portion (500) may be composed by arranging a plurality of unit patterns to cross each other in a diagonal direction, or may be composed by arranging unit patterns of various shapes other than a straight line shape. The above unit patterns may have a predetermined width and a predetermined depth, and adjacent unit patterns may be spaced apart at a predetermined interval.

[0174] According to one embodiment, by forming the first unit pattern (501a; 501b) and / or the second unit pattern (501c) on the second cathode-activated coating portion (415), the N / P inversion phenomenon can be prevented from occurring in the bending region (R1, R2), and battery performance and stability can be improved.

[0175] FIG. 11 is a side view of the bending region (R1, R2) of a battery cell (305) according to one embodiment of the present disclosure. FIG. 11 may be understood as illustrating a portion of the first bending region (R1) of FIG. 5c. Furthermore, the embodiment of FIG. 11 may optionally be combined with the embodiment of FIG. 7.

[0176] Referring to FIG. 11, when a jelly roll-shaped battery cell (305) is wound, a first pattern portion (500) and a second pattern portion (700) may be formed corresponding to the curved areas (R1, R2) located on both sides. The first pattern portion (500) may be disposed on the second positive electrode activation coating portion (415) located on the inside of the positive electrode plate (410). The second pattern portion (700) may be disposed on the second negative electrode activation coating portion (435) located on the inside of the negative electrode plate (430). Since the first pattern portion (500) is substantially the same as the first pattern portion (500) illustrated in FIGS. 7 to 10, the following description will focus on the second pattern portion (700).

[0177] According to one embodiment, the second pattern portion (700) may be formed on the second cathode-activated coating portion (435). The second pattern portion (700) may be formed by etching the second cathode-activated coating portion (435). The second cathode-activated coating portion (435) located on the inner side of the battery cell (305) may have a relatively low possibility of an N / P inversion phenomenon occurring.

[0178] According to one embodiment, the N / P ratio of the battery cell (305) can be appropriately maintained by forming a second pattern portion (700) on the second cathode-activated coating portion (435) corresponding to the bending area.

[0179] According to one embodiment, the second pattern portion (700) formed on the second cathode-activating coating portion (435) can increase the degree of impregnation of the electrolyte introduced into the battery cell (305). For example, due to the second pattern portion (700) formed on the second cathode-activating coating portion (435), the cross-sectional area of ​​the cathode plate (430) in contact with the electrolyte can be increased, or the electrolyte can easily flow through a channel formed by the second pattern portion (700).

[0180] According to one embodiment, by forming a second pattern portion (700) on the second cathode-activated coating portion (435), the N / P inversion phenomenon can be prevented and the degree of impregnation can be increased, thereby improving battery performance and stability.

[0181] FIG. 12 is a cross-sectional view illustrating a second pattern portion (700) formed on a second cathode-activating coating portion (435) of a cathode plate (430) according to one embodiment of the present disclosure. FIG. 12 may be understood as a cross-sectional view of the cathode plate (430) illustrated in FIG. 11 in a flat state before being wound. For convenience of explanation, the description will be centered on the first bending region (R1), but the same may be applied to the second bending region (R2). In addition, the first to third directions (d1, d2, d3) illustrated in FIG. 12 and below are substantially the same as the first to third directions (d1, d2, d3) of FIGS. 8 to 10.

[0182] Referring to FIG. 12, the second pattern portion (700) may be configured by repeating unit patterns (701). The unit pattern (701) may be formed by removing at least a portion of the second cathode-activated coating portion (435) by an etching process (e.g., the etching process (640) of FIG. 6).

[0183] According to one embodiment, the unit pattern (701) may have a predetermined width in the first direction (d1) and a predetermined depth in the third direction (d3). The predetermined width of the unit pattern (701) will be referred to as a “second width (w2),” and the predetermined depth of the unit pattern (701) will be referred to as a “second depth (h2).” The second width (w2) may be, for example, a length in the range of 50 um (micrometer) to 200 um. The second depth (h2) may be, for example, a length in the range of 5 um to 30 um.

[0184] According to one embodiment, unit patterns (701) and adjacent unit patterns (701) may be spaced apart by a predetermined distance. The predetermined distance spaced apart between adjacent unit patterns (701) will be referred to as a "second distance (l2)." The second distance (l2) may be, for example, a length in the range of 0.5 mm to 5 mm.

[0185] According to one embodiment, the characteristics of the battery cell (305) (e.g., energy density or immersion degree of the battery cell (305)) may be determined by the second width (w2), the second depth (h2) of the unit pattern (701) and / or the second spacing (l2) between adjacent unit patterns (701). For example, the energy density of the battery cell (305) may decrease in response to an increase in the second width (w2) and / or the second depth (h2).

[0186] According to one embodiment, the degree of impregnation of the battery cell (305) may increase in response to an increase in the second width (w2) and / or the second depth (h2). As the second width (w2) and / or the second depth (h2) increases, the degree of impregnation may increase because the surface area where the electrolyte comes into contact with the negative electrode plate (430) increases. In addition, as the second width (w2) and / or the second depth (h2) increases, the width and depth of a channel through which the electrolyte can easily flow in the negative electrode plate (430) may increase, thereby increasing the degree of impregnation.

[0187] In one embodiment, the energy density of the battery cell (305) may increase in response to an increase in the second spacing (l2). For example, the degree of impregnation of the battery cell (305) may decrease in response to an increase in the second spacing (l2). Accordingly, the second width (w2), the second depth (h2), and / or the second spacing (l2) may be determined in consideration of minimizing a decrease in the energy density of the battery cell (305) while simultaneously maximizing the degree of impregnation.

[0188] FIG. 13a is a cross-sectional view of a cathode plate (430) viewed from one direction according to one embodiment of the present disclosure.

[0189] FIG. 13b is a cross-sectional view of a portion of a cathode plate (430) viewed from one direction according to one embodiment of the present disclosure.

[0190] It can be understood that Fig. 13a illustrates a state in which the negative plate (430) is unfolded when the negative plate (430) is wound once to form a battery cell (305), and Fig. 13b illustrates a state in which the negative plate (430) is unfolded when the negative plate (430) is wound multiple times to form a battery cell (305).

[0191] Referring to FIGS. 13A and 13B, a cross-sectional view of a cathode plate (430) formed by sequentially stacking a first cathode-activated coating portion (e.g., the first cathode-activated coating portion (433) of FIG. 12), a second plate (431), and a second cathode-activated coating portion (435) may be understood as a cross-sectional view viewed from above. Hereinafter, a first direction (d1) (e.g., the first direction (d1) of FIG. 12) may be understood as a horizontal direction of the cathode plate (430) before the cathode plate (430) is wound, and a second direction (d2) may be understood as a vertical direction of the cathode plate (430) before the cathode plate (430) is wound. The second direction (d2) may be referred to as a width direction of the cathode plate (430). The third direction (d3) (e.g., the third direction (d3) of FIG. 12) can be understood as the thickness direction of the negative electrode plate (430). Before the negative electrode plate (430) is wound, the first to third directions (d1, d2, d3) can be arranged perpendicular to each other.

[0192] According to one embodiment, the cathode plate (430) can be wound along the first direction (d1).

[0193] According to one embodiment, the second pattern portion (700) may be arranged in a repeating manner as the cathode plate (430) extends in the first direction (d1). The second pattern portion (700) may be arranged in a repeating manner as a plurality of unit patterns (e.g., the unit pattern (701) of FIG. 12).

[0194] According to one embodiment, as the positive electrode plate (410) (e.g., the positive electrode plate (410) of FIG. 11), the first separator (420) (e.g., the first separator (420) of FIG. 11), the negative electrode plate (430) and the second separator (440) (e.g., the second separator (440) of FIG. 11) are wound to form a battery cell (e.g., the battery cell (305) of FIG. 5b), the second pattern portion (700) may be formed in a curved area of ​​the negative electrode plate (430) (e.g., the first curved area (R1) and / or the second curved area (R2) of FIG. 5c).

[0195] Although not shown, as the battery cell (305) is wound, the area of ​​the outer-positioned bending region (R1, R2) may be relatively larger than the area of ​​the inner-positioned bending region (R1, R2). Accordingly, the area of ​​the outer-positioned second pattern portion (700) among the plurality of second pattern portions (700) may be relatively larger than the area of ​​the inner-positioned second pattern portion (700).

[0196] In one embodiment, as the battery cell (305) is wound, the width of the first pattern portion (500) may increase.

[0197] For example, in FIG. 13a, if the second pattern portion (700) located on the left is referred to as the 2-1 pattern portion (700-1) (e.g., the 2nd pattern portion (700) of FIG. 12) and the second pattern portion (700) located on the right is referred to as the 2-2 pattern portion (700-2) (e.g., the 2nd pattern portion (700) of FIG. 12), the horizontal length (r2) of the 2-1 pattern portion (700-1) may be relatively shorter than the horizontal length (r2') of the 2-2 pattern portion (700-2).

[0198] For example, in FIG. 13b, if the second pattern portions (700) located in the d1 direction from the left are sequentially referred to as the 2-1 pattern portion (700-1), the 2-2 pattern portion (700-2), and the 2-3 pattern portion (700-3), the horizontal length (r21) of the 2-1 pattern portion (700-1) may be relatively shorter than the horizontal length (r22) of the 2-2 pattern portion (700-2), and the horizontal length (r22) of the 2-2 pattern portion (700-2) may be relatively shorter than the horizontal length (r23) of the 2-3 pattern portion (700-3).

[0199] According to one embodiment, as the battery cell (305) is wound multiple times, the distance between adjacent second pattern portions (700) may increase. For example, in FIG. 13b, if the distance between the 2-1 pattern portion (700-1) and the 2-2 pattern portion (700-2) adjacent to the right side of the 2-1 pattern portion (700-1) is "p21", and the distance between the 2-2 pattern portion (700-2) and the 2-3 pattern portion (700-3) adjacent to the right side of the 2-2 pattern portion (700-2) is "p22", then p21 <p22의 관계를 만족할 수 있다.

[0200] According to one embodiment, the unit pattern (701 in FIG. 12) may be implemented as a linear third unit pattern (e.g., the third unit pattern (701a) in FIG. 14a or the third unit pattern (701b) in FIG. 14b), or may be implemented as a combination of a fourth unit pattern (e.g., the fourth unit pattern (701c) in FIG. 14b) that is substantially vertically arranged with the third unit pattern (701b). The third unit patterns (701a, 701b) and the fourth unit pattern (701c) will be described with reference to FIGS. 14a and 14b.

[0201] FIG. 14a is a cross-sectional view illustrating a third unit pattern (701a) according to one embodiment of the present disclosure.

[0202] FIG. 14b is a cross-sectional view illustrating a grid-like pattern in which a third unit pattern (701b) and a fourth unit pattern (701c) are combined according to one embodiment of the present disclosure.

[0203] FIGS. 14a and 14b may be understood as enlarged views of the second pattern portion (700) of FIGS. 13a and 13b (e.g., the 2-1 pattern portion (700-1), the 2-2 pattern portion (700-2), or the 2-3 pattern portion (700-3)), and the embodiments of FIGS. 14a and 14b may be optionally combined with the embodiments of FIGS. 12 and 13. For example, the unit pattern (701) illustrated in FIG. 12 may include the third unit patterns (701a, 701b) of FIG. 14a, or may include the third unit pattern (701a) and the fourth unit pattern (701c) of FIG. 14b.

[0204] Referring to FIG. 14a, the second pattern portion (700) may be formed by repeatedly arranging a plurality of third unit patterns (701a). The third unit patterns (501a) may be arranged substantially parallel to the second direction (d2), and the plurality of third unit patterns (701a) may be spaced apart at a predetermined interval in the first direction (d1). The third unit pattern (701a) may have a second width (w2) (e.g., the second width (w2) of FIG. 12). The second width (w2) may be, for example, a length in the range of 50 um to 200 um. Two adjacent third unit patterns (701a) among the plurality of third unit patterns (701a) may be spaced apart at a second interval (l2) (e.g., the second interval (l2) of FIG. 12). The second gap (l2) may be, for example, a length in the range of 0.5 mm to 5 mm. Although not shown, the third unit pattern (701a) may have a predetermined depth in the third direction (d3). The predetermined depth may have a second depth (e.g., the second depth (h2) of FIG. 12). The second depth (h2) may be, for example, a length in the range of 5 um to 30 um. By changing at least one of the second width (w2), the second gap (l2), and the second depth (h2) of the third unit pattern (701a), the first pattern portion (500) of various shapes may be formed.

[0205] According to one embodiment, the third unit pattern (701a) can be formed by removing at least a portion of the second anodic activation coating portion (e.g., the second cathodic activation coating portion (435) of FIG. 11). The third unit pattern (701a) can be formed by etching at least a portion of the second cathodic activation coating portion (435) by a light source having a predetermined wavelength (e.g., a laser).

[0206] Referring to FIG. 14b, the second pattern portion (700) may be formed by repeatedly arranging third unit patterns (701b) (e.g., the third unit pattern (701a) of FIG. 14a). The second pattern portion (700) may include a third unit pattern (701b) and a fourth unit pattern (701c). The third unit pattern (701b) may be arranged substantially parallel to the second direction (d2), and a plurality of third unit patterns (701b) may be spaced apart at a predetermined interval in the first direction (d1). The fourth unit pattern (701c) may be arranged substantially parallel to the first direction (d1), and a plurality of fourth unit patterns (701c) may be spaced apart at a predetermined interval in the second direction (d2). The fourth unit pattern (501c) may be arranged substantially perpendicular to the third unit pattern (701b). A plurality of third unit patterns (701b) and a plurality of fourth unit patterns (701c) can intersect to form a grid-shaped pattern.

[0207] According to one embodiment, the third unit pattern (701b) may have a second-first width (w21) (e.g., the second width (w2) of FIG. 12). The second-first width (w21) may be, for example, a length in the range of 50 μm to 200 μm. Two adjacent third unit patterns (701b) among the plurality of third unit patterns (701b) may be spaced apart by a second-first interval (l21) (e.g., the first interval (l2) of FIG. 12). The second-first interval (l21) may be, for example, a length in the range of 0.5 mm to 5 mm.

[0208] According to one embodiment, the fourth unit pattern (701c) may have a second-second width (w22) (e.g., the second width (w2) of FIG. 12). The second-second width (w22) may be, for example, a length in the range of 50 μm to 200 μm. Two adjacent second unit patterns (701c) among the plurality of fourth unit patterns (701c) may be spaced apart by a second-second interval (l22) (e.g., the second interval (l2) of FIG. 12). The second-second interval (l22) may be, for example, a length in the range of 0.5 mm to 5 mm.

[0209] Although not shown, the third unit pattern (701b) and the fourth unit pattern (701c) may have a predetermined depth in the third direction (d3). The predetermined depth may have a second depth (e.g., the second depth (h2) of FIG. 12). The second depth (h2) may have a length in the range of, for example, 5 um to 30 um.

[0210] According to one embodiment, various combinations of second pattern portions (700) can be formed by changing at least one of the second width (w2), second spacing (l2), and second depth (h2) of the third unit pattern (701b) and the fourth unit pattern (701c).

[0211] According to one embodiment, the third unit pattern (701b) and the fourth unit pattern (701c) can be formed by removing at least a portion of the second cathode-activated coating portion (e.g., the second cathode-activated coating portion (435) of FIG. 11). The third unit pattern (701b) and the fourth unit pattern (701c) can be formed by etching at least a portion of the second cathode-activated coating portion (435) by a light source having a predetermined wavelength (e.g., a laser).

[0212] Although not shown, when the negative electrode plate (430) is wound once or multiple times to form a battery cell (305) (e.g., battery cell (305) of FIG. 5b), it may include a second pattern portion (700) to which different unit patterns are applied corresponding to the bending regions (e.g., bending regions R1 and R2 of FIG. 5c). For example, in the first bending region (R1), the negative electrode plate (430) may include a second pattern portion (700) to which a third pattern shape (e.g., a third unit pattern (701a) having a linear shape) is applied, and in the second bending region (R2), the negative electrode plate (430) may include a second pattern portion (700) to which a fourth pattern shape (e.g., a third unit pattern (701b) and a fourth unit pattern (701c) having a lattice shape) are applied in combination. In various embodiments, the third pattern shape and the fourth pattern shape may be formed with the same pattern. As another example, in the first bending region (R1), the cathode plate (430) may include a second pattern portion (700-1) to which a third unit pattern (701a) having a linear shape is applied. In a bending region other than the first bending region (R1) (e.g., R2, R3 (not shown)), the cathode plate (430) may include a second pattern portion (e.g., 700-2, 700-3) to which a third unit pattern (701b) having a linear shape is applied. Two adjacent third unit patterns (701a) among the plurality of third unit patterns (701a) may be spaced apart by a second-first interval (l2). The second-first interval (l2) may be, for example, a length in the range of 0.5 mm to 5 mm. Among the plurality of third unit patterns (701b), two adjacent third unit patterns (701b) may be spaced apart by a second-first interval (l21). The second-first interval (l21) may be, for example, a length in the range of 0.5 mm to 5 mm.

[0213] In addition, although not shown, when the negative plate (430) is wound once or multiple times to form a battery cell (305), a second pattern portion (700) may be included in which the width of the unit pattern, the depth of the unit pattern, and the spacing between the unit patterns are applied differently in response to the bending areas (R1, R2). For example, the second pattern portion (700) may be composed of only the third unit pattern (701a) (e.g., the second pattern portion (700) of FIG. 14a), or may be composed of a combination of the third unit pattern (701b) and the fourth unit pattern (701c) (e.g., the second pattern portion (700) of FIG. 14b), or may be composed of a combination of unit patterns of various patterns (not shown). For example, the second pattern portion (700) may be composed by arranging a plurality of unit patterns to cross each other in a diagonal direction, or may be composed by arranging unit patterns of various shapes other than a straight line shape. The above unit patterns may have a predetermined width and a predetermined depth, and adjacent unit patterns may be spaced apart at a predetermined interval.

[0214] According to one embodiment, by forming a third unit pattern (701a; 701b) and / or a fourth unit pattern (701c) on the second cathode-activated coating portion (435), the N / P inversion phenomenon can be prevented from occurring in the bending region (R1, R2), and battery performance and stability can be improved.

[0215] An electronic device (101) according to one embodiment of the present disclosure may include a battery (205) having a predetermined pattern formed on a positive electrode plate (410) or a negative electrode plate (430) corresponding to a bending area.

[0216] An electronic device (101) according to one embodiment of the present disclosure can provide a jelly roll battery with improved N / P ratio reversal phenomenon in a bending region.

[0217] An electronic device (101) according to one embodiment of the present disclosure can provide a battery with improved impregnation.

[0218] An electronic device (101) according to one embodiment of the present disclosure can provide a battery with improved performance and stability.

[0219] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure belongs from the description below.

[0220] An electronic device according to one embodiment of the present disclosure (e.g., electronic device (101) of FIG. 1) may include a battery assembly (250; 300) including a housing (110) and a cover member (301) disposed within the housing (110) and arranged to surround at least a portion of the battery cell (305). The battery cell (305) including the curved regions (R1, R2) on both sides may include a positive electrode (410) including a positive electrode current collector (411) and positive electrode active material coating portions (413, 415) arranged on both sides of the positive electrode current collector (411), a negative electrode (430) including a negative electrode current collector (431) and negative electrode active material coating portions (433, 435) arranged on both sides of the negative electrode current collector (431), and a separator (420, 440) arranged between the positive electrode (410) and the negative electrode (430). Among the above-described positive electrode active material coating portions (413, 415), the positive electrode active material coating portion (415) positioned adjacent to the center (C) of the battery cell (305) is located in the curved region (R1, R2) and may include a first pattern portion (500) which is a combination of a plurality of unit patterns (501) that are repeated at least in part and engraved.

[0221] In an electronic device (101) according to one embodiment of the present disclosure, the first pattern portion (500) may include first unit patterns (501a) arranged in the width direction (d2) of the anode (410).

[0222] In an electronic device (101) according to one embodiment of the present disclosure, the first unit pattern (501a) may have a predetermined width (w1) and a predetermined depth (h1), and adjacent first unit patterns (501a) may be arranged to be spaced apart from each other by a predetermined interval (l1).

[0223] In an electronic device (101) according to one embodiment of the present disclosure, the predetermined width (w1) may be 50 um (micrometer) to 200 um.

[0224] In an electronic device (101) according to one embodiment of the present disclosure, the predetermined depth (h1) may be 5 um to 30 um.

[0225] In an electronic device (101) according to one embodiment of the present disclosure, the predetermined gap (l1) may be 0.5 mm to 5 mm.

[0226] In an electronic device (101) according to one embodiment of the present disclosure, the first pattern portion (500) may further include second unit patterns (501c) that are arranged substantially perpendicular to the first unit patterns (501a; 501b). The second unit patterns (501c) may have a predetermined width (w12) and a predetermined depth (h12), and adjacent second unit patterns (501c) may be arranged to be spaced apart from each other by a predetermined interval (l12).

[0227] In an electronic device (101) according to one embodiment of the present disclosure, among the negative active material coating portions (433, 435), the negative active material coating portion (435) positioned adjacent to the center of the battery cell (305) is located in the curved region (R1, R2) and may include a second pattern portion (700) which is a combination of a plurality of unit patterns (701) that are repeated at least in part and engraved.

[0228] In an electronic device (101) according to one embodiment of the present disclosure, the second pattern portion (700) may include third unit patterns (701a) arranged in the width direction (d2) of the cathode (430).

[0229] In an electronic device (101) according to one embodiment of the present disclosure, the third unit pattern (701a) may have a predetermined width (w2) and a predetermined depth (h2), and adjacent third unit patterns (701a) may be arranged to be spaced apart from each other by a predetermined interval (l2).

[0230] In an electronic device (101) according to one embodiment of the present disclosure, the second pattern portion (700) may further include fourth unit patterns (701c) that are arranged substantially perpendicular to the third unit patterns (701a; 701b). The fourth unit pattern (701c) may have a predetermined width (w22) and a predetermined depth (h22), and adjacent fourth unit patterns (701c) may be arranged to be spaced apart from each other by a predetermined interval (l22).

[0231] In an electronic device (101) according to one embodiment of the present disclosure, the area of ​​the first pattern portion (500) or the second pattern portion (700) may be determined to correspond to the area of ​​the curved region (R1, R2).

[0232] In an electronic device (101) according to one embodiment of the present disclosure, the shape of the unit patterns (701a; 701b; 701c) constituting the second pattern portion (700) may be the same as or different from the shape of the unit patterns (501a; 501b; 501c) constituting the first pattern portion (500).

[0233] In an electronic device (101) according to one embodiment of the present disclosure, the first pattern portion (500) may include a plurality of first pattern portions (500-1, 500-2, 500-3). The shapes of the unit patterns (501a; 501b; 501c) constituting different first pattern portions (500-1, 500-2, 500-3) among the plurality of first pattern portions (500-1, 500-2, 500-3) may be the same or different from each other.

[0234] In an electronic device (101) according to one embodiment of the present disclosure, the second pattern portion (700) may include a plurality of second pattern portions (700-1, 700-2, 700-3). The shapes of the unit patterns (701a; 701b; 701c) constituting different second pattern portions (700-1, 700-2, 700-3) among the plurality of second pattern portions (700-1, 700-2, 700-3) may be the same or different from each other.

[0235] A battery assembly according to one embodiment of the present disclosure (e.g., battery (250) of FIG. 4A or battery assembly (300) of FIG. 5A) may include a battery cell (305) and a cover member (301) arranged to surround at least a portion of the battery cell (305). The battery cell (305) of a jelly-roll type having curved regions (R1, R2) on both sides may include a positive electrode (410) including a positive electrode current collector (411) and positive electrode active material coating portions (413, 415) arranged on both sides of the positive electrode current collector (411), a negative electrode (430) including a negative electrode current collector (431) and negative electrode active material coating portions (433, 435) arranged on both sides of the negative electrode current collector (431), and a separator (420, 440) arranged between the positive electrode (410) and the negative electrode (430). Among the above-described positive electrode active material coating portions (413, 415), the positive electrode active material coating portion (415) positioned adjacent to the center (C) of the battery cell (305) is located in the curved region (R1, R2) and may include a first pattern portion (500) which is a combination of a plurality of unit patterns (501) that are repeated at least in part and engraved.

[0236] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the first pattern portion (500) may include first unit patterns (501a) arranged in the width direction (d2) of the positive electrode (410).

[0237] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the first unit pattern (501a) may have a predetermined width (w1) and a predetermined depth (h1), and adjacent first unit patterns (501a) may be arranged to be spaced apart from each other by a predetermined interval (l1).

[0238] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the predetermined width (w1) may be 50 um (micrometer) to 200 um.

[0239] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the predetermined depth (h1) may be 5 um to 30 um.

[0240] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the predetermined gap (l1) may be 0.5 mm to 5 mm.

[0241] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the first pattern portion (500) may further include second unit patterns (501c) that are arranged substantially perpendicular to the first unit patterns (501a; 501b). The second unit patterns (501c) may have a predetermined width (w12) and a predetermined depth (h12), and adjacent second unit patterns (501c) may be arranged to be spaced apart from each other by a predetermined interval (l12).

[0242] In a battery assembly (250; 300) according to one embodiment of the present disclosure, among the negative active material coating portions (433, 435), the negative active material coating portion (435) positioned adjacent to the center of the battery cell (305) is located in the curved region (R1, R2) and may include a second pattern portion (700) which is a combination of a plurality of unit patterns (701) that are repeated at least in part engraved.

[0243] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the second pattern portion (700) may include third unit patterns (701a) arranged in the width direction (d2) of the negative electrode (430).

[0244] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the third unit pattern (701a) may have a predetermined width (w2) and a predetermined depth (h2), and adjacent third unit patterns (701a) may be arranged to be spaced apart from each other by a predetermined interval (l2).

[0245] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the second pattern portion (700) may further include fourth unit patterns (701c) that are arranged substantially perpendicular to the third unit patterns (701a; 701b). The fourth unit patterns (701c) may have a predetermined width (w22) and a predetermined depth (h22), and adjacent fourth unit patterns (701c) may be arranged to be spaced apart from each other by a predetermined interval (l22).

[0246] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the area of ​​the first pattern portion (500) or the second pattern portion (700) may be determined to correspond to the area of ​​the curved region (R1, R2).

[0247] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the shape of the unit pattern (701a; 701b; 701c) constituting the second pattern portion (700) may be the same as or different from the shape of the unit pattern (501a; 501b; 501c) constituting the first pattern portion (500).

[0248] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the first pattern portion (500) may include a plurality of first pattern portions (500-1, 500-2, 500-3). The shapes of the unit patterns (501a; 501b; 501c) constituting different first pattern portions (500-1, 500-2, 500-3) among the plurality of first pattern portions (500-1, 500-2, 500-3) may be the same or different from each other.

[0249] In a battery assembly (250; 300) according to one embodiment of the present disclosure, the second pattern portion (700) may include a plurality of second pattern portions (700-1, 700-2, 700-3). The shapes of the unit patterns (701a; 701b; 701c) constituting different second pattern portions (700-1, 700-2, 700-3) among the plurality of second pattern portions (700-1, 700-2, 700-3) may be the same or different from each other.

Claims

1. In an electronic device (101), Housing (110); and A battery assembly (250; 300) is disposed within the housing (110) and includes a battery cell (305) and a cover member (301) disposed to surround at least a portion of the battery cell (305). The battery cell (305) including the bending region (R1, R2) on both sides, A cathode (410) including a cathode current collector (411) and cathode active material coating portions (413, 415) arranged on both sides of the cathode current collector (411); A negative electrode (430) including a negative electrode current collector (431) and negative electrode active material coating parts (433, 435) arranged on both sides of the negative electrode current collector (431); and It includes a separator (420, 440) placed between the positive electrode (410) and the negative electrode (430), Among the above cathode active material coating parts (413, 415), the cathode active material coating part (415) positioned adjacent to the center (C) of the battery cell (305) is An electronic device (101) comprising a first pattern portion (500) which is a combination of a plurality of unit patterns (501) that are positioned in the above-mentioned curved region (R1, R2) and are repeated at least in part.

2. In paragraph 1, The first pattern portion (500) includes first unit patterns (501a) arranged in the width direction (d2) of the anode (410). Electronic device (101).

3. In paragraph 2, An electronic device (101), wherein the first unit pattern (501a) has a predetermined width (w1) and a predetermined depth (h1), and adjacent first unit patterns (501a) are arranged at a predetermined interval (l1).

4. In paragraph 3, The above-mentioned predetermined width (w1) is 50 um (micrometer) to 200 um, electronic device (101).

5. In paragraph 3 or 4, An electronic device (101) wherein the above-described depth (h1) is 5 um to 30 um.

6. In any one of paragraphs 3 to 5, The above predetermined interval (l1) is 0.5 mm to 5 mm, electronic device (101).

7. In any one of paragraphs 2 to 6, The first pattern portion (500) further includes second unit patterns (501c) that are arranged substantially perpendicular to the first unit pattern (501a; 501b), An electronic device (101), wherein the second unit pattern (501c) has a predetermined width (w12) and a predetermined depth (h12), and adjacent second unit patterns (501c) are arranged at a predetermined interval (l12).

8. In any one of paragraphs 1 to 7, Among the negative electrode active material coating parts (433, 435), the negative electrode active material coating part (435) positioned adjacent to the center of the battery cell (305) is An electronic device (101) comprising a second pattern portion (700) which is a combination of a plurality of unit patterns (701) that are positioned in the above-mentioned curved region (R1, R2) and are repeated at least in part.

9. In paragraph 8, An electronic device (101), wherein the second pattern portion (700) includes third unit patterns (701a) arranged in the width direction (d2) of the cathode (430).

10. In paragraph 9, An electronic device (101), wherein the third unit pattern (701a) has a predetermined width (w2) and a predetermined depth (h2), and adjacent third unit patterns (701a) are arranged at a predetermined interval (l2).

11. In clause 9 or 10, The second pattern portion (700) further includes fourth unit patterns (701c) that are arranged substantially vertically with the third unit patterns (701a; 701b), An electronic device (101), wherein the fourth unit pattern (701c) has a predetermined width (w22) and a predetermined depth (h22), and adjacent fourth unit patterns (701c) are arranged at a predetermined interval (l22).

12. In any one of paragraphs 8 to 11, An electronic device (101), wherein the area of ​​the first pattern portion (500) or the second pattern portion (700) is determined corresponding to the area of ​​the curved region (R1, R2).

13. In any one of paragraphs 8 to 12, An electronic device (101) in which the shape of the unit pattern (701a; 701b; 701c) constituting the second pattern portion (700) is the same as or different from the shape of the unit pattern (501a; 501b; 501c) constituting the first pattern portion (500).

14. In any one of paragraphs 8 to 13, The first pattern section (500) includes a plurality of first pattern sections (500-1, 500-2, 500-3), The second pattern section (700) includes a plurality of second pattern sections (700-1, 700-2, 700-3). The shapes of the unit patterns (501a; 501b; 501c) constituting different first pattern parts (500-1, 500-2, 500-3) among the plurality of first pattern parts (500-1, 500-2, 500-3) are the same or different from each other, An electronic device (101) in which the shapes of the unit patterns (701a; 701b; 701c) constituting different second pattern portions (700-1, 700-2, 700-3) among the plurality of second pattern portions (700-1, 700-2, 700-3) are identical or different from each other.

15. In the battery assembly (250; 300), It comprises a battery cell (305) and a cover member (301) arranged to surround at least a portion of the battery cell (305). The battery cell (305) of the jelly-roll type including curved regions (R1, R2) on both sides, A cathode (410) including a cathode current collector (411) and cathode active material coating portions (413, 415) arranged on both sides of the cathode current collector (411); A negative electrode (430) including a negative electrode current collector (431) and negative electrode active material coating parts (433, 435) arranged on both sides of the negative electrode current collector (431); and It includes a separator (420, 440) placed between the positive electrode (410) and the negative electrode (430), Among the above cathode active material coating parts (413, 415), the cathode active material coating part (415) positioned adjacent to the center (C) of the battery cell (305) is A battery assembly (250; 300) comprising a first pattern portion (500) which is a combination of a plurality of unit patterns (501) that are positioned in the above-mentioned curved area (R1, R2) and are repeated at least in part.

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