Battery and electronic device comprising same

Abstract

This battery may include an electrode and a lead tab electrically connected to the electrode. The electrode may include an active material layer, a first current collector, and a second current collector. The first current collector may include a first portion disposed to overlap the active material layer on at least one surface of the first current collector, and a second portion that does not overlap the active material layer and protrudes from the first portion of the first current collector. The second current collector may include a portion overlapping the second portion of the first current collector, and another portion not overlapping the second portion of the first current collector. The lead tab may be coupled to another portion of the second current collector so as to be electrically connected to the electrode. A first distance from the first portion of the first current collector to a location where the lead tab is coupled to another portion of the second current collector may be shorter than a second distance from the first portion of the first current collector to a location where the second portion of the first current collector is coupled to a portion of the second current collector.

Description

Battery and electronic device including the same

[0001] The following descriptions relate to batteries and electronic devices containing them.

[0002] An electronic device may include various electronic components. The electronic device may include a battery for providing power to the electronic components. The battery may include a negative electrode, a positive electrode, and a separator disposed between them. An electrode tab extending from the electrode may be coupled to a lead tab. Power provided from the battery may be provided to the outside of the battery through the lead tab.

[0003] A battery is disclosed. The battery may include an electrode and a lead tab electrically connected to the electrode. The electrode may include an active material layer, a first current collector, and a second current collector. The first current collector may include a first portion disposed to overlap the active material layer on at least one surface of the first current collector, and a second portion protruding from the first portion of the first current collector without overlapping the active material layer. The second current collector may include a portion overlapping the second portion of the first current collector and another portion not overlapping the second portion of the first current collector. The lead tab may be electrically connected to the electrode through being coupled to the other portion of the second current collector. The first distance from the first part of the first current collector to the position where the lead tab is coupled to the other part of the second current collector may be shorter than the second distance from the first part of the first current collector to the position where the second part of the first current collector is coupled to the part of the second current collector.

[0004] An electronic device is disclosed. The electronic device may include a battery and an electronic component driven by power from the battery. The battery may include an electrode and a lead tab electrically connected to the electrode. The electrode may include an active material layer, a first current collector, and a second current collector. The first current collector may include a first portion disposed to overlap the active material layer on at least one surface of the first current collector, and a second portion protruding from the first portion of the first current collector without overlapping the active material layer. The second current collector may include a portion overlapping the second portion of the first current collector and another portion not overlapping the second portion of the first current collector. The lead tab may be electrically connected to the electrode through being coupled to the other portion of the second current collector. The first distance from the first part of the first current collector to the position where the lead tab is coupled to the other part of the second current collector may be shorter than the second distance from the first part of the first current collector to the position where the second part of the first current collector is coupled to the part of the second current collector.

[0005] FIG. 1 is a block diagram of an electronic device in a network environment according to various embodiments.

[0006] FIG. 2 is a block diagram of a power management module and a battery according to one embodiment.

[0007] FIG. 3a is a perspective view of a battery according to one embodiment.

[0008] FIG. 3b is a cross-sectional view of the battery of FIG. 3a cut along A-A'.

[0009] Fig. 3c is an exploded perspective view of the battery of Fig. 3a.

[0010] FIG. 4a is a cross-sectional view of the electrode of the battery in FIG. 3c cut along E-E'.

[0011] FIG. 4b is a cross-sectional view of the electrode of the battery in FIG. 3c cut along D-D'.

[0012] FIG. 4c is a cross-sectional view of the electrode of the battery in FIG. 3c cut along C-C'.

[0013] FIG. 4d is a cross-sectional view of the electrode of FIG. 3c cut along B-B'.

[0014] FIG. 5a is a top view of the positive electrode of a battery of an electronic device according to one embodiment.

[0015] FIG. 5b is a top view of the positive electrode of a battery of an electronic device according to one embodiment.

[0016] FIG. 5c is a top view of the positive electrode of a battery of an electronic device according to one embodiment.

[0017] FIG. 5d is a top view of the positive electrode of a battery of an electronic device according to one embodiment.

[0018] FIG. 6 is a flowchart illustrating a process of combining the electrode and lead tab of a battery of an electronic device according to one embodiment.

[0019] FIG. 7a is a drawing illustrating an electrode current collector according to one embodiment.

[0020] FIG. 7b is a drawing illustrating an electrode current collector coated with a positive active material according to one embodiment.

[0021] FIG. 7c is a drawing illustrating an electrode current collector with a portion of the unused area removed, according to one embodiment.

[0022] FIG. 7d is a drawing illustrating an example in which an additional current collector is positioned on top of an electrode current collector to be coupled to a non-transparent area, according to one embodiment.

[0023] FIG. 7e is a drawing illustrating an example in which an additional current collector is positioned on an electrode current collector so that the additional current collector is coupled to a non-transparent area, according to one embodiment.

[0024] FIG. 7f is a drawing illustrating an example in which an additional current collector and a non-current area are welded so that the additional current collector is joined to the non-current area according to one embodiment.

[0025] FIG. 7g is a drawing illustrating an example in which an electrode tab and an additional current collector are welded so that the electrode tab is coupled to the additional current collector according to one embodiment.

[0026] FIG. 8 is a drawing illustrating an electrode according to one embodiment.

[0027] FIG. 9a is a drawing illustrating a jelly roll according to one embodiment.

[0028] FIG. 9b is a drawing illustrating a cylindrical battery according to one embodiment.

[0029] FIG. 1 is a block diagram of an electronic device (101) in a network environment (100) according to various embodiments.

[0030] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) through a first network (198) (e.g., a short-range wireless communication network) or with at least one of an electronic device (104) or a server (108) through 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) through a server (108). According to one embodiment, the electronic device (101) may include a processor (120), memory (130), input module (150), sound output module (155), display module (160), audio module (170), sensor module (176), interface (177), connection terminal (178), haptic module (179), camera module (180), power management module (188), battery (189), communication module (190), subscriber identification module (196), or antenna module (197). In some embodiments, at least one of these components (e.g., connection terminal (178)) may be omitted from the electronic device (101), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (176), camera module (180), or antenna module (197)) may be integrated into a single component (e.g., display module (160)).

[0031] The processor (120) can control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) by executing software (e.g., a program (140)), and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (120) can store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in volatile memory (132), process the commands or data stored in volatile memory (132), and store the resulting data in 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 an auxiliary processor (123) that can operate independently or together with it (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, if the electronic device (101) includes a main processor (121) and an auxiliary processor (123), the auxiliary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a designated function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as part thereof.

[0032] The auxiliary processor (123) may control at least some of the functions or states associated with at least one component of the electronic device (101) (e.g., display module (160), sensor module (176), or communication module (190)) 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. According to one embodiment, the auxiliary processor (123) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (180) or communication module (190)). According to one embodiment, the auxiliary processor (123) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or through a separate server (e.g., server (108)). The learning algorithm may 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 may include a plurality of artificial neural network layers.An artificial neural network may be 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 the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0033] The memory (130) can store various data used by at least one component of the electronic device (101) (e.g., processor (120) or sensor module (176)). The data may include, for example, input data or output data for software (e.g., program (140)) and related commands. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0034] The program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0035] The input module (150) can receive commands or data to be used for a component of the electronic device (101) (e.g., processor (120)) from outside the electronic device (101) (e.g., user). The input module (150) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0036] The sound output module (155) can output a sound signal to the outside of the electronic device (101). The sound output module (155) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0037] The display module (160) can visually provide information to an external (e.g., user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling said device. According to 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 the force generated by said touch.

[0038] The audio module (170) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150) or output sound through the sound output module (155) or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphones) connected directly or wirelessly to the electronic device (101).

[0039] The sensor module (176) can detect the operating state of the electronic device (101) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (176) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0040] The interface (177) may support one or more specified protocols that can be used for the electronic device (101) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (102)). According to 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.

[0041] The connection terminal (178) may include a connector through which the electronic device (101) can 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).

[0042] The haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (179) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0043] The camera module (180) can capture still images and video. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0044] 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 part of a power management integrated circuit (PMIC).

[0045] The battery (189) can supply power to at least one component of the electronic device (101). According to one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0046] The communication module (190) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an 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 include one or more communication processors that operate independently of the processor (120) (e.g., application processor) and 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., cellular communication module, short-range wireless communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (104) through a first network (198) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (199) (e.g., 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 may 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 identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (196).

[0047] The wireless communication module (192) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The wireless communication module (192) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (192) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), 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), external electronic device (e.g., electronic device (104)), or network system (e.g., 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 realizing eMBB, loss coverage (e.g., 664 dB or less) for realizing mMTC, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 6 ms or less) for realizing URLLC.

[0048] An antenna module (197) can transmit a signal or power to an external source (e.g., an external electronic device) or receive it from an external source. According to one embodiment, the antenna module (197) may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to 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 a first network (198) or a second network (199), may be selected from the plurality of antennas, for example, by a 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. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (197).

[0049] According to various embodiments, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0050] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0051] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) through 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 performed on the electronic device (101) may be performed on one or more of the external electronic devices (102, 104, or 108). For example, if the electronic device (101) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (101) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or 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 provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (101) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (104) or the server (108) may be included within a 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.

[0052] FIG. 2 is a block diagram of a power management module and a battery according to one embodiment.

[0053] Referring to FIG. 2, the power management module (188) may include a charging circuit (210), a power regulator (220), or a power gauge (230). The charging circuit (210) can charge the battery (189) using power supplied from an external power source to the electronic device (101). According to one embodiment, the charging circuit (210) can select a charging method (e.g., normal charging or fast charging) based on at least some of the types of external power sources (e.g., power adapter, USB, or wireless charging), the magnitude of power available from the external power source, or the attributes of the battery (189), and charge the battery (189) using the selected charging method. The external power source may be wired to the electronic device (101), for example, through a connection terminal (178), or wirelessly connected through an antenna module (197).

[0054] The power regulator (220) can generate multiple powers having different voltage or different current levels by adjusting the voltage level or current level of the power supplied from, for example, an external power source or a battery (189). The power regulator (220) can adjust the power of the external power source or battery (189) to a voltage or current level suitable for each of the components included in the electronic device (101). According to one embodiment, the power regulator (220) may be implemented in the form of a low drop-out (LDO) regulator or a switching regulator. The power gauge (230) can measure usage status information for the battery (189) (e.g., capacity of the battery (189), number of charge / discharge cycles, voltage, or temperature).

[0055] The power management module (188) can determine charge state information related to the charging of the battery (189) (e.g., lifespan, overvoltage, undervoltage, overcurrent, overcharge, overdischarge, overheating, short circuit, or swelling) based at least part of the measured usage state information, using, for example, a charging circuit (210), a voltage regulator (220), or a power gauge (230). The power management module (188) can determine whether the battery (189) is normal or abnormal based at least part of the determined charge state information. If the state of the battery (189) is determined to be abnormal, the power management module (188) can adjust the charging of the battery (189) (e.g., reducing the charging current or voltage, or stopping the charging). According to one embodiment, at least some of the functions of the power management module (188) may be performed by an external control device (e.g., a processor (120)).

[0056] According to one embodiment, the battery (189) may include a battery protection circuit module (PCM) (240). The battery protection circuit (240) may perform one or more of various functions (e.g., a pre-shutdown function) to prevent performance degradation or burnout of the battery (189). The battery protection circuit (240) may additionally or substantially be configured as at least part of a battery management system (BMS) capable of performing various functions including cell balancing, measuring battery capacity, measuring charge / discharge cycles, measuring temperature, or measuring voltage.

[0057] According to one embodiment, at least a portion of the usage status information or charge status information of the battery (189) may be measured using a corresponding sensor (e.g., temperature sensor) among the sensor modules (276), a power gauge (230), or a power management module (188). According to one embodiment, the corresponding sensor (e.g., temperature sensor) among the sensor modules (176) may be included as part of the battery protection circuit (240) or placed near the battery (189) as a separate device.

[0058] FIG. 3a is a perspective view of a battery according to one embodiment. FIG. 3b is an exploded perspective view of the battery of FIG. 3b. FIG. 3c is a cross-sectional view of the battery of FIG. 3a taken along A-A'.

[0059] The battery (300) of FIG. 3a may be referred to as the aforementioned battery module (189). For example, the battery (300) may be a rechargeable secondary battery. For example, the battery (300) may be a lithium-ion battery.

[0060] A battery (300) according to one embodiment may include a case (340). The case (340) may form the exterior of the battery (300). Components of the battery (300) (e.g., negative electrode (311), positive electrode (312), separator (350), and electrolyte in FIG. 3c) may be accommodated within the case (340). The case (340) may protect the components accommodated inside. The case (340) may include a pouch-type case or a prismatic (or cylindrical) case. The case (340) illustrated in FIG. 3a is illustrated as a pouch-type case, but is not limited thereto. For example, the case (340) may be a prismatic (or cylindrical) case.

[0061] In one embodiment, an electronic device (e.g., the electronic device (101) of FIG. 1) may include electronic components for implementing various functions (e.g., a processor (e.g., the processor (120) of FIG. 1), an audio module (e.g., the audio module (170) of FIG. 1), a camera module (e.g., the camera module (180) of FIG. 1), and / or an antenna module (e.g., the antenna module (197) of FIG. 1). A battery (300) of the electronic device (101) may be configured to provide power for the operation of the electronic components.

[0062] In one embodiment, the battery (300) may include a lead tab (330). For example, the lead tab (330) may be electrically connected to an electrical circuit such as a battery protection circuit module (PCM). For example, the lead tab (330) may provide an electrical connection between an electrode (e.g., electrode (310) in FIG. 3b) placed within the case (340) and an electronic component outside the battery (300). The battery protection circuit module (PCM) may be placed in a terrace seal area (341).

[0063] In one embodiment, power from the battery (300) can be provided to each of the electronic components through the lead tab (330). For example, power stored in the battery (300) can be provided to the outside through the lead tab (330) (discharge), and power provided to charge the battery (300) from the outside can be provided to the battery (300) through the lead tab (330) (charge). The lead tab (330) can be coupled to an electrode tab (e.g., electrode tab (320) of FIG. 3b) of an electrode (310) disposed inside the case (340). The lead tab (330) may include a first lead tab (331) in contact with a first electrode tab (e.g., first electrode tab (321) of FIG. 3A) and a second lead tab (332) in contact with a second electrode tab (e.g., second electrode tab (322) of FIG. 3A). A portion of the lead tab (330) may be exposed to the outside of the case (340). A portion of the lead tab (330) extending from the inside of the case (340) to the outside of the case (340) may be exposed to the side of the case (340). To seal the case (340) where the lead tab (330) is exposed, a terrace seal (341) containing an insulating material may be formed on the side of the case (340).

[0064] Referring to FIG. 3b, in one embodiment, the battery (300) may include a lead tab (330) connected to an electrode (310). The lead tab (330) may be exposed outside the case (340) by extending through the terrace seal (341) of the case (340). The lead tab (330) may be electrically connected to an external circuit or electrically connected to another battery to form a battery module or battery pack.

[0065] In one embodiment, the lead tab (330) may comprise a conductive material. For example, the lead tab (330) may comprise a metal. A portion of the lead tab (330) may be exposed to the outside of the case (340), and an electrode tab (320) extending from the electrode (310) may extend toward another portion of the lead tab (330) located within the case (340). The electrode tab (320) may be at least partially bent so as to be coupled with the lead tab (330).

[0066] In one embodiment, the electrode (310) may include an electrode tab (320). The electrode tab (320) may extend from the electrode (310) and be coupled to a lead tab (330). In one embodiment, the methods of coupling the lead tab (330) and the electrode tab (320) may vary. For example, a method of welding the lead tab (330) to the electrode tab (320) using ultrasound may be used. Alternatively, a method of welding the lead tab (330) to the electrode tab (320) using a laser may be used. Alternatively, a method of pre-welding the lead tab (330) by adding a separate substrate in the electrode process for manufacturing the electrode (310) may be used.

[0067] In one embodiment, referring to FIG. 3c, components of a battery (300) may be arranged inside a case (340). For example, a negative electrode (311), a positive electrode (312), a separator (350), and an electrolyte may be arranged inside the case (340). The battery (300) illustrated in FIG. 3c may be a stack-type battery in which the negative electrode (311) and the positive electrode (312) are alternately stacked. The negative electrode (311) and the positive electrode (312), respectively, may be referred to as a cathode and an anode based on the discharge of the battery (300).

[0068] In one embodiment, the electrode (310) may include a negative electrode (311) and a positive electrode (312) having electrically opposite characteristics. The electrode (310) may include an electrode current collector and an electrode active material layer coated on the electrode current collector. In one embodiment, the negative electrode (311) may include a negative electrode substrate and a negative electrode active material layer coated on the negative electrode substrate. In one embodiment, the positive electrode (312) may include a positive electrode substrate and a positive electrode active material layer coated on the positive electrode substrate.

[0069] For example, the cathode substrate and / or the anode substrate may comprise a non-conductive material (e.g., a polymer). For example, the polymer may comprise polyethylene (PE) or polyethylene terephthalate (PET).

[0070] In one embodiment, the negative active material layer may include a negative active material involved in the electrochemical reaction of the negative electrode (311), a conductive material to improve electrical conductivity within the negative electrode (311), and a binder to enable the negative active material layer to be easily attached to the negative substrate. In one embodiment, the negative active material may include graphite, LTO (lithium titanate), silicon (Si), germanium (Ge), tin (Sn), or lithium oxide (Li2O). In one embodiment, the binder of the negative active material layer may use a polymer material such as PVDF (polyvinylidene fluoride), PAA (polyacrylic acid), SBR (styrene-butadiene rubber), and CMC (carboxymethylcellulose).

[0071] In one embodiment, the positive active material layer may include a positive active material involved in the electrochemical reaction of the positive electrode (312), a conductive material for improving electrical conductivity within the positive electrode (312), and a binder so that the positive active material layer can be easily attached to the positive substrate. In one embodiment, the positive active material may include LiCoO2, LiNiCoMnO2, LiNiCoAlO2, LiTiS2, LiCoO2, LiNiO2, LiMnO2, LiMn2O4, LiCo2O4, LiFePO4, LiMnPO4, LiCoPO4, LiFeSO4F, or LiVPO4F, but is not limited thereto. In one embodiment, a polymer material such as PVDF may be used as the binder of the positive active material layer.

[0072] In one embodiment, a separator (350) may be interposed between the positive electrode (312) and the negative electrode (311). The separator (350) may provide a passage through which lithium ions can pass and may prevent physical contact (or direct electrical short circuit) between the negative electrode (311) and the positive electrode (312).

[0073] In one embodiment, the electrolyte may provide a path for lithium ions to move between the positive electrode (312) and the negative electrode (311). For example, the electrolyte may include a liquid electrolyte or a gel electrolyte.

[0074] In one embodiment, the electrode (310) may include an electrode tab (320). For example, the electrode tab (320) may include a first electrode tab (321) extending from a negative electrode (311) and a second electrode tab (322) extending from a positive electrode (312). The first electrode tab (321) may be referred to as the negative electrode tab, and the second electrode tab (322) may be referred to as the positive electrode tab.

[0075] In one embodiment, the bonding force between the lead tab (330) and the electrode tab (320) may be affected by the difference in physical properties between the lead tab (330) and the electrode tab (320). The lead tab (330) may include a conductive material (e.g., metal). If the electrode tab (320) bonded to the lead tab (330) includes a non-conductive material (e.g., polymer), the bonding force may be weakened by the difference in physical properties between the conductive material of the lead tab (330) and the non-conductive material of the electrode tab (320).

[0076] FIG. 4a is a cross-sectional view of the electrode of the battery in FIG. 3c cut along E-E'. FIG. 4b is a cross-sectional view of the electrode of the battery in FIG. 3c cut along D-D'.

[0077] Figure 4a, which shows a cross-sectional view cut along E-E' of Figure 3c, and Figure 4b, which shows a cross-sectional view cut along D-D' of Figure 3c, show that the arrangement relationship of the electrode (310) and components may vary depending on the position of the electrode tab being cut.

[0078] In one embodiment, referring to FIG. 4a, the electrode (310) may include a plurality of negative electrodes (311), a plurality of positive electrodes (312), and a plurality of separators (350).

[0079] In one embodiment, referring to an enlarged view of the connection structure between a cathode electrode (311) and a cathode lead tab (331), the cathode electrode (311) may include a cathode electrode current collector (411) and at least one cathode active material layer (413, 415). For example, the cathode active material layer (413, 415) may be formed by coating on the upper surface (or first surface) and / or lower surface (or second surface) of the cathode electrode current collector (411). For example, the cathode electrode current collector (411) may include a plurality of layers. For example, the cathode electrode current collector (411) may have a non-conductive layer (411-3). For example, the cathode electrode current collector (411) may include a non-conductive material (e.g., a polymer). For example, the negative electrode current collector (411) may include a layer (411-3) of a non-conductive material (e.g., a polymer). For example, the polymer may include polyethylene (PE) or polyethylene terephthalate (PET). For example, the negative electrode current collector (411) may have a conductive layer (411-1, 411-2). For example, the negative electrode current collector (411) may include a conductive layer (411-1, 411-2) formed by coating the upper surface (or first surface) and / or lower surface (or second surface) of the non-conductive layer (411-3). In one embodiment, the conductive layer (411-1, 411-2) of the negative electrode current collector (411) may include a metal (e.g., copper (Cu)).

[0080] In one embodiment, the negative electrode current collector (411) comprises a polymer and may include an electrode layer (conductive layer) on the upper and / or lower surface of the polymer. For example, in the case of the negative electrode current collector (411), the electrode layer may be formed on the upper and / or lower surface of the polymer. Here, the polymer may be a non-conductive layer (411-3), and the electrode layer may be a conductive layer (411-1, 411-2).

[0081] For example, the negative electrode active material layer (413, 415) may include a negative electrode active material, a conductive material, and a binder. For example, the negative electrode active material layer (413, 415) may be disposed on a non-conductive layer (411-3) and / or a conductive layer (411-1, 411-2) of the negative electrode current collector (411). The negative electrode active material layer (413, 415) may include a first active material layer (413) disposed on the upper surface (or first surface) of the negative electrode current collector (411) and a second active material layer (415) disposed on the lower surface (or second surface) of the negative electrode current collector (411). However, it is not limited thereto. For example, the active material layer (413, 415) may be disposed on one of the upper surface (or first surface) and lower surface (or second surface) of the negative electrode current collector (411).

[0082] In one embodiment, a region (430) of the negative electrode (311) that includes at least one negative active material layer (413, 415) (or a region coated with the negative active material) may be referred to as a coating region (435). In one embodiment, a region (430) of the negative electrode (311) that does not include at least one negative active material layer (413, 415) (or a region not coated with the negative active material) may be referred to as a non-coating region (431). In one embodiment, the coating region (435) may be referred to as a first part of the negative electrode (311) (or a first part of the negative electrode current collector (411).

[0083] In one embodiment, the thicknesses (T1, T2) of at least one negative active material layer (413, 415) coated on the negative electrode current collector (411) may be thicker than the thickness (T3) of the negative electrode current collector (411). For example, the thicknesses (T1, T2) of at least one negative active material layer (413, 415) coated on the negative electrode current collector (411) may be about 40 to 50 μm. For example, the thickness (T3) of the negative electrode current collector (411) may be about 8 μm. In one embodiment, the thickness (T3-3) of the non-conductive layer (411-3) of the negative electrode current collector (411) may be about 6 μm, and the thicknesses (T3-1, T3-2) of the conductive layers (411-1, 411-2) may be 1 μm. For example, the thickness (T3) of the negative electrode current collector (411) may have a value obtained by adding the thickness (T3-3) of the non-conductive layer (411-3) and the thicknesses (T3-1, T3-2) of the conductive layers (411-1, 411-2). The aforementioned values ​​are merely examples, and the embodiments are not limited to the aforementioned values ​​of thickness. The thickness (T1), thickness (T2), and / or thickness (T3) are not limited to the values ​​of the above embodiments and may be formed with other values.

[0084] In one embodiment, an additional current collector (421, 425) may be coupled (or attached) to the upper surface (or first surface) and / or lower surface (or second surface) of the non-circulating region (431) (or, negative electrode current collector (411)) of the negative electrode (311). For example, the additional current collector (421, 425) may be coupled (or attached) to the upper surface (or first surface) and / or lower surface (or second surface) of the non-circulating region (431) (or, negative electrode current collector (411)) of the negative electrode (311) so as to be electrically connected to at least one negative active material layer (413, 415). For example, when a negative electrode active material is coated on both sides of a negative electrode current collector (411), two additional current collectors (421, 425) may be attached (or attached) to each side of the negative electrode current collector (411) coated with the negative electrode active material. However, this is not limited thereto. For example, when a negative electrode active material is coated on only one side of the negative electrode current collector (411), one additional current collector (421, 425) may be attached (or attached) to one side of the negative electrode current collector (411) coated with the negative electrode active material.

[0085] For example, additional current collectors (421, 425) may include a first additional current collector (421) covering the upper surface (or, first surface) of the negative electrode current collector (411) and a second additional current collector (425) covering the lower surface (or, second surface). In one embodiment, the first additional current collector (421) may be physically coupled with the second additional current collector (425) in an area where the non-transparent region (431) and the second additional current collector (425) overlap.

[0086] For example, additional current collectors (421, 425) can be joined to the cathode electrode tab (321) of the cathode electrode current collector (411) by welding them at the portion (441, 443) overlapping with the cathode electrode tab (321). For example, the additional current collectors (421, 425) and the cathode electrode tab (321) can be melted and fused by frictional heat generated by ultrasonic vibration, and then the additional current collectors (421, 425) can be welded onto the cathode electrode tab (321) through a cooling process. Alternatively, the additional current collectors (421, 425) and the electrode tab (321) can be melted and fused by high heat generated by a laser, and then the additional current collectors (421, 425) can be welded onto the cathode electrode tab (321) through a cooling process.

[0087] In one embodiment, referring to FIG. 4b, each of the cathode electrode tabs (321) of the plurality of cathode electrodes (311) may be electrically connected to the cathode lead tab (331). In FIG. 4b, some of the cathode electrode tabs (321) are shown as not being electrically connected to the cathode lead tab (331), but this is merely an example, and all of the cathode electrode tabs (321) of the plurality of cathode electrodes (311) may be electrically connected to the cathode lead tab (331).

[0088] In one embodiment, the negative lead tab (331) may include a conductive material to provide an electrical connection between the negative electrode (311) and an external circuit. For example, the negative lead tab (331) may include a metal. For example, the negative lead tab (331) may be the same type of metal (e.g., aluminum) as the additional current collectors (421, 425).

[0089] In FIG. 4b, compared to FIG. 4a, the non-existent region (431) may be removed. Accordingly, the negative lead tab (331) may be joined to the additional current collectors (421, 425) by welding them to the additional current collectors (421, 425) in the portion (445) where the non-existent region (431) has been removed. For example, the negative lead tab (331) may be joined to the additional current collectors (421, 425) by welding them to the additional current collectors (421, 425) in the portion (445) that does not overlap with the negative electrode tab (321). The welding of the negative lead tab (331) to the additional current collectors (421, 425) in the portion (445) that does not overlap with the negative electrode tab (321) may be explained with reference to FIG. 5a through 5d below.

[0090] For example, the cathode lead tab (331) and additional current collectors (421, 425) may be melted and fused by frictional heat generated by ultrasonic vibration, and then the cathode lead tab (331) may be welded onto the additional current collectors (421, 425) through a cooling process. Alternatively, the cathode lead tab (331) and additional current collectors (421, 425) may be melted and fused by high heat generated by a laser, and then the cathode lead tab (331) may be welded onto the additional current collectors (421, 425) through a cooling process. In one embodiment, the cathode electrode tab (321) may be bent toward the cathode lead tab (331) by welding the additional current collectors (421, 425) to the cathode lead tab (331).

[0091] FIG. 4c is a cross-sectional view of the electrode of the battery in FIG. 3c cut along C-C'. FIG. 4d is a cross-sectional view of the electrode of the battery in FIG. 3c cut along B-B'.

[0092] Figure 4c, showing a cross-sectional view cut along C-C' of Figure 3c, and Figure 4d, showing a cross-sectional view cut along B-B' of Figure 3c, show that the arrangement relationship of the electrode (310) and components may vary depending on the position of the electrode tab being cut.

[0093] In one embodiment, referring to FIG. 4c, the electrode (310) may include a plurality of negative electrodes (311), a plurality of positive electrodes (312), and a plurality of separators (350).

[0094] In one embodiment, referring to an enlarged view of the connection structure between a positive electrode (312) and a positive lead tab (332), the positive electrode (312) may include a positive electrode current collector (451) and at least one positive active material layer (453, 455). For example, the positive active material layer (453, 455) may be formed by coating on the upper surface (or first surface) and / or lower surface (or second surface) of the positive electrode current collector (451). For example, the positive electrode current collector (451) may include a plurality of layers. For example, the positive electrode current collector (451) may have a non-conductive layer (451-3). For example, the positive electrode current collector (451) may include a non-conductive material (e.g., a polymer). For example, the positive electrode current collector (451) may include a layer (451-3) of a non-conductive material (e.g., a polymer). For example, the polymer may include polyethylene (PE) or polyethylene terephthalate (PET). For example, the positive electrode current collector (451) may have a conductive layer (451-1, 451-2). For example, the positive electrode current collector (451) may include a conductive layer (451-1, 451-2) formed by coating the upper surface (or first surface) and / or lower surface (or second surface) of a non-conductive layer (451-3). In one embodiment, the conductive layer (451-1, 451-2) of the positive electrode current collector (451) may include a metal (e.g., aluminum (Al)).

[0095] In one embodiment, the positive electrode current collector (451) comprises a polymer and may include an electrode layer (conductive layer) on the upper and / or lower surface of the polymer. For example, in the case of the positive electrode current collector (451), the electrode layer may be formed on the upper and / or lower surface of the polymer. Here, the polymer may be a non-conductive layer (451-3), and the electrode layer may be a conductive layer (451-1, 451-2).

[0096] For example, the positive active material layer (453, 455) may include a positive active material, a conductive material, and a binder. For example, the positive active material layer (453, 455) may be disposed on a non-conductive layer (451-3) and / or a conductive layer (451-1, 451-2) of the positive electrode current collector (451). The positive active material layer (453, 455) may include a first active material layer (453) disposed on the upper surface (or first surface) of the positive electrode current collector (451) and a second active material layer (455) disposed on the lower surface (or second surface) of the positive electrode current collector (451). However, it is not limited thereto. For example, the active material layer (453, 455) may be disposed on one of the upper surface (or first surface) and lower surface (or second surface) of the positive electrode current collector (451).

[0097] In one embodiment, an area (or area coated with a positive active material) containing at least one positive active material layer (453, 455) in the region (470) of the positive electrode (312) may be referred to as a retained area (475). In one embodiment, an area (or area not coated with a positive active material) not containing at least one positive active material layer (453, 455) in the region (470) of the positive electrode (312) may be referred to as a non-retained area (471).

[0098] In one embodiment, the thicknesses (T4, T5) of at least one positive active material layer (453, 455) coated on the positive electrode current collector (451) may be thicker than the thickness (T6) of the positive electrode current collector (451). For example, the thicknesses (T4, T5) of at least one positive active material layer (453, 455) coated on the positive electrode current collector (451) may be about 40 to 50 μm. For example, the thickness (T6) of the positive electrode current collector (451) may be about 8 μm. For example, the thickness (T6-3) of the non-conductive layer (451-3) of the positive electrode current collector (451) may be about 6 μm, and the thicknesses (T6-1, T6-2) of the conductive layers (451-1, 451-2) may be 1 μm. For example, the thickness (T6) of the positive electrode current collector (451) may have a value obtained by adding the thickness (T6-3) of the non-conductive layer (451-3) and the thicknesses (T6-1, T6-2) of the conductive layers (451-1, 451-2). The aforementioned values ​​are merely examples, and the embodiments are not limited to the aforementioned thickness values. The thickness (T1), thickness (T2), and / or thickness (T3) are not limited to the values ​​of the above embodiments and may be formed with other values.

[0099] In one embodiment, an additional current collector (461, 465) may be coupled (or attached) to the upper surface (or first surface) and / or lower surface (or second surface) of the non-positive region (471) (or positive electrode current collector (451)) of the positive electrode (312). For example, the additional current collector (461, 465) may be coupled (or attached) to the upper surface (or first surface) and / or lower surface (or second surface) of the non-positive region (471) (or positive electrode current collector (451)) of the positive electrode (312) so as to be electrically connected to at least one positive active material layer (453, 455). For example, when a positive active material is coated on both sides of a positive electrode current collector (451), two additional current collectors (461, 465) may be attached (or, attached) to each side of the positive electrode current collector (451) coated with the positive active material. However, this is not limited thereto. For example, when a positive active material is coated on only one side of the positive electrode current collector (451), one additional current collector (461, 465) may be attached (or, attached) to one side of the positive electrode current collector (451) coated with the positive active material.

[0100] For example, additional current collectors (461, 465) may include a first additional current collector (461) covering the upper surface (or, first surface) of the positive electrode current collector (451) and a second additional current collector (465) covering the lower surface (or, second surface). In one embodiment, the first additional current collector (461) may be physically coupled with the second additional current collector (465) in an area where the unlit region (471) and the second additional current collector (465) overlap.

[0101] For example, additional current collectors (461, 465) can be joined to the positive electrode tab (322) of the positive electrode current collector (451) by welding them at the portion (481, 483) overlapping with the positive electrode tab (322). For example, the additional current collectors (461, 465) and the positive electrode tab (322) can be melted and fused by frictional heat generated by ultrasonic vibration, and then the additional current collectors (461, 465) can be welded onto the positive electrode tab (322) through a cooling process. Alternatively, the additional current collectors (461, 465) and the positive electrode tab (322) can be melted and fused by high heat generated by a laser, and then the additional current collectors (461, 465) can be welded onto the positive electrode tab (322) through a cooling process.

[0102] In one embodiment, referring to FIG. 4d, each positive electrode tab (322) of a plurality of positive electrodes (312) may be electrically connected to a positive lead tab (332). In FIG. 4d, some of the positive electrode tabs (322) are shown as not being electrically connected to the positive lead tab (332), but this is merely an example, and all positive electrode tabs (322) of the plurality of positive electrodes (312) may be electrically connected to the positive lead tab (332).

[0103] In one embodiment, the positive lead tab (332) may include a conductive material to provide an electrical connection between the positive electrode (312) and an external circuit. For example, the positive lead tab (332) may include a metal. For example, the positive lead tab (332) may be the same type of metal (e.g., aluminum) as the additional current collectors (461, 465).

[0104] In FIG. 4d, compared to FIG. 4c, the non-existent region (471) may be removed. Accordingly, the positive lead tab (332) may be joined to the additional current collectors (461, 465) by welding them to the additional current collectors (461, 465) in the portion (485) where the non-existent region (471) has been removed. For example, the positive lead tab (332) may be joined to the additional current collectors (461, 465) by welding them to the additional current collectors (461, 465) in the portion (485) that does not overlap with the positive electrode tab (322). The welding of the positive lead tab (332) to the additional current collectors (461, 465) in the portion (485) that does not overlap with the positive electrode tab (322) may be explained with reference to FIG. 5a through 5d below.

[0105] For example, the positive lead tab (332) and additional current collectors (461, 465) may be melted and fused by frictional heat generated by ultrasonic vibration, and then the positive lead tab (332) may be welded onto the additional current collectors (461, 465) through a cooling process. Alternatively, the positive lead tab (332) and additional current collectors (461, 465) may be melted and fused by high heat generated by a laser, and then the positive lead tab (332) may be welded onto the additional current collectors (461, 465) through a cooling process. In one embodiment, the positive electrode tab (322) may be bent toward the positive lead tab (332) by welding the additional current collectors (461, 465) to the positive lead tab (333).

[0106] FIG. 5a is a top view of the positive electrode of a battery of an electronic device according to one embodiment.

[0107] Referring to FIG. 5a, the electrode current collector of the positive electrode (312) may include a retaining region (475) coated with an active material (or overlapping with the active material layer) and a non-coated region (471) not coated with an active material (or not overlapping with the active material layer).

[0108] In one embodiment, an additional current collector (460) may be positioned to cover a non-clear area (471) of the positive electrode (312). In one embodiment, an additional current collector (460) may be positioned to cover the non-clear area (471) of the positive electrode (312) and the area where the non-clear area has been removed. For example, the additional current collector (460) may include a first additional current collector (e.g., 461 in FIG. 4b) covering the upper surface (or, first surface) of the non-clear area (471) and a second additional current collector (e.g., 465 in FIG. 4b) covering the lower surface (or, second surface).

[0109] In one embodiment, the additional current collector (460) can be joined to the positive electrode tab (322) by being welded in the portion (535) overlapping with the non-transparent area (471). For example, the additional current collector (460) and the positive electrode tab (322) may be melted and fused by frictional heat generated by ultrasonic vibration, and then the additional current collector (460) may be welded onto the positive electrode tab (322) through a cooling process. Alternatively, the additional current collector (460) and the positive electrode tab (322) may be melted and fused by high heat generated by a laser, and then the additional current collector (460) may be welded onto the positive electrode tab (322) through a cooling process.

[0110] In one embodiment, the positive lead tab (332) may be electrically connected to the active material layer through an additional current collector (460). For example, the positive lead tab (332) may be physically connected to the additional current collector (460) electrically connected to the active material layer by welding it to the additional current collector (460). For example, the distance (525) between the location (530) where the positive lead tab (332) is physically connected to the additional current collector (460) and the boundary (510) of the retaining area (475) may be shorter than the distance (520) of the non-retaining area (471). In one embodiment, the positive lead tab (332) may be physically connected to the additional current collector (460) at a location (530) within a portion that does not overlap with the positive electrode tab (322). However, it is not limited thereto. In one embodiment, the positive lead tab (332) may be physically coupled to an additional current collector (460) at a location (530) that is shorter than the distance (520) of the non-existent area (471), regardless of whether it overlaps with the positive electrode tab (322). The location (530) where the positive lead tab (332) is physically coupled to the additional current collector (460) may be between the boundary (510) of the retaining area (475) and the non-existent area distance (520).

[0111] For example, the positive lead tab (332) and the additional current collector (460) may be melted and fused by frictional heat generated by ultrasonic vibration, and then the positive lead tab (332) may be welded onto the additional current collector (460) through a cooling process. Alternatively, the positive lead tab (332) and the additional current collector (460) may be melted and fused by high heat generated by a laser, and then the positive lead tab (332) may be welded onto the additional current collector (460) through a cooling process.

[0112] With reference to FIG. 5a, the positive electrode (312) has been described, but the structure of FIG. 5a can also be applied to the negative electrode. For example, the positive electrode (312) of FIG. 5a can be replaced with the negative electrode (e.g., 311 of FIG. 4a). For example, the retaining region (475) of FIG. 5a can be replaced with the retaining region of the negative electrode (e.g., 435 of FIG. 4a). For example, the non-retaining region (471) of FIG. 5a can be replaced with the non-retaining region of the negative electrode (311) (e.g., 431 of FIG. 4a). For example, the additional current collector (460) of FIG. 5a can be replaced with the additional current collector of the negative electrode (311) (e.g., 421, 425 of FIG. 4a). For example, the positive electrode tab (322) of FIG. 5a may be replaced with the negative electrode tab (e.g., 321 of FIG. 4a) of the negative electrode (311). For example, the negative lead tab (331) may be physically coupled to an additional current collector (e.g., 421, 425 of FIG. 4a) to be electrically connected to the active material layer by being welded to an additional current collector (460). For example, the length between the location where the negative lead tab (331) is physically coupled to the additional current collector (421, 425) and the boundary of the retaining region (e.g., 435 of FIG. 4a) may be shorter than the length of the unoccupied region (e.g., 431 of FIG. 4a).

[0113] FIG. 5b is a top view of the positive electrode of a battery of an electronic device according to one embodiment.

[0114] FIG. 5b may illustrate an example in which the positive lead tab (332) is coupled to an additional current collector (460) in a state physically separated from the boundary (510) of the retaining region (475) compared to FIG. 5a. In FIG. 5b, the retaining region (471) (or positive electrode tab (322)) is exemplified as being located between the positive lead tab (332) and the boundary (510) of the retaining region (475), but this is merely an example. For example, the retaining region (471) (or positive electrode tab (322)) may not exist between the positive lead tab (332) and the boundary (510) of the retaining region (475).

[0115] Referring to FIG. 5b, the electrode current collector of the positive electrode (312) may include a retaining area (475) and a non-retaining area (471). In one embodiment, an additional current collector (460) may be positioned to cover the non-retaining area (471) of the positive electrode (312). In one embodiment, the additional current collector (460) may be joined to the positive electrode tab (322) by being welded at a portion (535) that overlaps with the non-retaining area (471).

[0116] In one embodiment, the positive lead tab (332) may be electrically connected to the active material layer through an additional current collector (460). For example, the positive lead tab (332) may be physically connected to the additional current collector (460) electrically connected to the active material layer by welding it to the additional current collector (460). For example, the distance (525) between the location (530) where the positive lead tab (332) is physically connected to the additional current collector (460) and the boundary (510) of the retaining area (475) may be shorter than the distance (520) of the non-retaining area (471). In one embodiment, the positive lead tab (332) may be physically connected to the additional current collector (460) at a location (530) within a portion that does not overlap with the positive electrode tab (322). However, it is not limited thereto. In one embodiment, the positive lead tab (332) can be physically coupled to an additional current collector (460) at a location (530) at a distance (525) shorter than the distance (520) of the non-existent area (471), regardless of whether it overlaps with the positive electrode tab (322).

[0117] With reference to FIG. 5b, the positive electrode (312) has been described, but the structure of FIG. 5b can also be applied to the negative electrode. For example, the positive electrode (312) of FIG. 5b can be replaced with the negative electrode (e.g., 311 of FIG. 4a). For example, the retaining region (475) of FIG. 5b can be replaced with the retaining region of the negative electrode (e.g., 435 of FIG. 4a). For example, the non-retaining region (471) of FIG. 5b can be replaced with the non-retaining region of the negative electrode (311) (e.g., 431 of FIG. 4a). For example, the additional current collector (460) of FIG. 5b can be replaced with the additional current collector of the negative electrode (311) (e.g., 421, 425 of FIG. 4a). For example, the positive electrode tab (322) of FIG. 5b may be replaced with the negative electrode tab of the negative electrode (311) (e.g., 321 of FIG. 4a). For example, the negative lead tab (331) may be physically coupled to an additional current collector (421, 425) to be electrically connected to the active material layer by welding to an additional current collector (460). For example, the length between the location where the negative lead tab (331) is physically coupled to the additional current collector (421, 425) and the boundary of the holding area (435) may be shorter than the length of the non-conducting area (431).

[0118] FIG. 5c is a top view of the positive electrode of a battery of an electronic device according to one embodiment.

[0119] FIG. 5c may show an example in which, compared to FIG. 5a, the positive lead tab (332) is coupled to an additional current collector (460) between the non-blocking regions (471).

[0120] Referring to FIG. 5c, the electrode current collector of the positive electrode (312) may include a retaining region (475) and a non-retaining region (471). For example, the non-retaining region (471) may include a first non-retaining region (541) and a second non-retaining region (545) physically separated from the first non-retaining region (541).

[0121] In one embodiment, an additional current collector (460) may be positioned to cover the unoccupied area (471) of the positive electrode (312). In one embodiment, the additional current collector (460) may be joined to the positive electrode tab (322) by being welded at the portion (535, 539) that overlaps with the unoccupied area (471).

[0122] In one embodiment, the positive lead tab (332) may be electrically connected to the active material layer through an additional current collector (460). For example, the positive lead tab (332) may be physically connected to the additional current collector (460) electrically connected to the active material layer by welding it to the additional current collector (460). For example, the positive lead tab (332) may be physically connected to the additional current collector (460) between the first non-circular area (541) and the second non-circular area (545).

[0123] For example, the distance (525) between the location (530) where the positive lead tab (332) is physically coupled to the additional current collector (460) and the boundary (510) of the retention area (475) may be shorter than the distance (520) of the non-retention area (471). In one embodiment, the positive lead tab (332) may be physically coupled to the additional current collector (460) at a location (530) between a first non-retention area (541) and a second non-retention area (545) that do not overlap with the positive electrode tab (322). However, it is not limited thereto. In one embodiment, the positive lead tab (332) may be physically coupled to the additional current collector (460) at a location (530) at a distance (525) shorter than the distance (520) of the non-retention area (471), regardless of whether it overlaps with the positive electrode tab (322).

[0124] With reference to FIG. 5c, the positive electrode (312) has been described, but the structure of FIG. 5c can also be applied to the negative electrode. For example, the positive electrode (312) of FIG. 5c can be replaced with the negative electrode (e.g., 311 of FIG. 4a). For example, the retaining region (475) of FIG. 5c can be replaced with the retaining region of the negative electrode (e.g., 435 of FIG. 4a). For example, the non-retaining region (471) of FIG. 5c can be replaced with the non-retaining region of the negative electrode (311) (e.g., 431 of FIG. 4a). For example, the additional current collector (460) of FIG. 5c can be replaced with the additional current collector of the negative electrode (311) (e.g., 421, 425 of FIG. 4a). For example, the positive electrode tab (322) of FIG. 5c can be replaced with the negative electrode tab of the negative electrode (311) (e.g., 321 of FIG. 4a). For example, the negative lead tab (331) can be physically coupled to an additional current collector (421, 425) to be electrically connected to the active material layer by welding it to an additional current collector (460). For example, the length between the location where the negative lead tab (331) is physically coupled to the additional current collector (421, 425) and the boundary of the holding area (435) can be shorter than the length of the non-conducting area (431).

[0125] FIG. 5d is a top view of the positive electrode of a battery of an electronic device according to one embodiment.

[0126] FIG. 5d can show an example in which the unlit area (471) has a concave shape compared to FIG. 5c.

[0127] Referring to FIG. 5d, the electrode current collector of the positive electrode (312) may include a retaining region (475) and a non-retaining region (471). For example, the non-retaining region (471) may include a dent region (550) within a concave shape.

[0128] In one embodiment, an additional current collector (460) may be positioned to cover the unoccupied area (471) of the positive electrode (312). In one embodiment, the additional current collector (460) may be joined to the positive electrode tab (322) by being welded at the portion (535, 539) that overlaps with the unoccupied area (471).

[0129] In one embodiment, the positive lead tab (332) may be electrically connected to the active material layer through an additional current collector (460). For example, the positive lead tab (332) may be physically connected to the additional current collector (460) electrically connected to the active material layer by welding it to the additional current collector (460). For example, the positive lead tab (332) may be physically connected to the additional current collector (460) in a space provided through a dent area (550).

[0130] For example, the distance (525) between the location (530) where the positive lead tab (332) is physically coupled to the additional current collector (460) and the boundary (510) of the retention area (475) may be shorter than the distance (520) of the non-retention area (471). In one embodiment, the positive lead tab (332) may be physically coupled to the additional current collector (460) at a location (530) within a dent area (550) that does not overlap with the positive electrode tab (322). However, it is not limited thereto. In one embodiment, the positive lead tab (332) may be physically coupled to the additional current collector (460) at a location (530) at a distance (525) shorter than the distance (520) of the non-retention area (471), regardless of whether it overlaps with the positive electrode tab (322).

[0131] With reference to FIG. 5d, the positive electrode (312) has been described, but the structure of FIG. 5d can also be applied to the negative electrode. For example, the positive electrode (312) of FIG. 5d can be replaced with the negative electrode (e.g., 311 of FIG. 4a). For example, the retaining region (475) of FIG. 5d can be replaced with the retaining region of the negative electrode (e.g., 435 of FIG. 4a). For example, the non-retaining region (471) of FIG. 5d can be replaced with the non-retaining region of the negative electrode (311) (e.g., 431 of FIG. 4a). For example, the additional current collector (460) of FIG. 5d can be replaced with the additional current collector of the negative electrode (311) (e.g., 421, 425 of FIG. 4a). For example, the positive electrode tab (322) of FIG. 5d can be replaced with the negative electrode tab of the negative electrode (311) (e.g., 321 of FIG. 4a). For example, the negative lead tab (331) can be physically coupled to an additional current collector (421, 425) to be electrically connected to the active material layer by welding to an additional current collector (460). For example, the length between the location where the negative lead tab (331) is physically coupled to the additional current collector (421, 425) and the boundary of the holding area (435) can be shorter than the length of the unoccupied area (431).

[0132] FIG. 6 is a flowchart illustrating a process of combining an electrode and a lead tab of a battery of an electronic device according to one embodiment. FIG. 7a is a drawing illustrating an electrode current collector according to one embodiment. FIG. 7b is a drawing illustrating an electrode current collector coated with a positive active material according to one embodiment. FIG. 7c is a drawing illustrating an electrode current collector with a portion of the non-positive area removed according to one embodiment. FIG. 7d is a drawing illustrating an example in which an additional current collector is positioned on the electrode current collector to be combined with the non-positive area according to one embodiment. FIG. 7e is a drawing illustrating an example in which an additional current collector is positioned on the electrode current collector so that the additional current collector is combined with the non-positive area according to one embodiment. FIG. 7f is a drawing illustrating an example in which an additional current collector and a non-positive area are welded so that the additional current collector is combined with the non-positive area according to one embodiment. FIG. 7g is a drawing illustrating an example in which an electrode tab and an additional current collector are welded so that the electrode tab is combined with the additional current collector according to one embodiment.

[0133] Referring to Fig. 6, in process 610, a portion of the unmarked area can be removed.

[0134] In one embodiment, the positive electrode current collector (451) of FIG. 7a may comprise a non-conductive material (e.g., a polymer). For example, the polymer may comprise polyethylene (PE) or polyethylene terephthalate (PET).

[0135] In one embodiment, the positive electrode current collector (451) comprises a polymer and may include an electrode layer on the upper and / or lower surface of the polymer. For example, in the case of the positive electrode current collector (451), an aluminum (Al) layer may be formed on the upper and / or lower surface of the polymer.

[0136] In one embodiment, an anode active material layer (e.g., 453 in FIG. 7b) may be formed on the upper surface (or, first surface) and / or lower surface (or, second surface) of the anode electrode current collector (451). In one embodiment, the anode active material layer (453) may be formed by coating the anode active material on the upper surface (or, first surface) and / or lower surface (or, second surface) of the anode electrode current collector (451). In one embodiment, the anode active material may be coated on a portion of the upper surface (or, first surface) and / or lower surface (or, second surface) of the anode electrode current collector (451). For example, the area of ​​the anode electrode current collector (451) coated with the anode active material may be referred to as a retaining area (e.g., 475 in FIG. 7b) (or anode active material layer). In one embodiment, the area of ​​the positive electrode current collector (451) that is not coated with the positive active material may be referred to as an uncoated area (e.g., 471, 710 in FIG. 7b).

[0137] In one embodiment, among the blank regions (471, 710), the blank region (710) that is not formed as an anode electrode tab may be removed (or etched) (or excluded). In one embodiment, among the blank regions (471, 710), a portion of the blank region (471) that is formed as an anode electrode tab may be removed (or etched) (or excluded). For example, referring to FIG. 7c, a portion of the blank region (471) may be removed (or etched) (or excluded) so that the blank region (471) is formed in a gear shape.

[0138] Referring again to Fig. 6, in process 620, an additional current collector can be combined on the blackout area.

[0139] In one embodiment, referring to FIG. 7d, an additional current collector (461, 465) may be coupled (or attached) to the upper surface (or first surface) and / or lower surface (or second surface) of the non-positive region (471) (or positive electrode current collector (451)) of the positive electrode (312). For example, the additional current collector (461, 465) may be coupled (or attached) to the upper surface (or first surface) and / or lower surface (or second surface) of the non-positive region (471) (or positive electrode current collector (451)) of the positive electrode (312) so as to be electrically connected to at least one positive active material layer (453, 455). For example, if the positive active material is coated on only one side of the positive electrode current collector (451), one additional current collector (461) may be attached (or, attached) to one side of the positive electrode current collector (451) coated with the positive active material. For example, if the positive active material is coated on both sides of the positive electrode current collector (451), two additional current collectors (461) may be attached (or, attached) to each side of the positive electrode current collector (451) coated with the positive active material.

[0140] In one embodiment, referring to FIG. 7e, an additional current collector (461) can be joined to the positive electrode tab (322) of the positive electrode current collector (451) by welding it to the portion overlapping with the positive electrode tab (322). For example, the additional current collector (461) and the positive electrode tab (322) may be melted and fused by frictional heat generated by ultrasonic vibration, and then the additional current collector (461) may be welded onto the positive electrode tab (322) through a subsequent cooling process. Alternatively, the additional current collector (461) and the electrode tab (322) may be melted and fused by high heat generated by a laser, and then the additional current collector (461) may be welded onto the positive electrode tab (322) through a subsequent cooling process. By welding the additional current collector (461) to the portion overlapping with the positive electrode tab (322), a welding mark (e.g., a bead (720)) may be created on the additional current collector (461).

[0141] In one embodiment, referring to FIG. 7e, the positive electrode current collector (451) and the additional current collector (461) may be cut along the cutting planes (731, 732, 733, 734, 735, 741, 742, 743, 744, 745, 746). For example, as illustrated in FIG. 7f, a plurality of positive electrodes (312) may be manufactured by cutting the positive electrode current collector (451) and the additional current collector (461) along the cutting planes (731, 732, 733, 734, 735, 741, 742, 743, 744, 745, 746).

[0142] For example, a single positive electrode (312) may have multiple beads (e.g., 751, 752, 753, 754 of FIG. 7g) created by welding an additional current collector (461) multiple times in the portion overlapping with the positive electrode tab (322).

[0143] Referring again to Fig. 6, in process 630, a lead tab can be joined to an additional current collector at a location where the blank area and the additional current collector do not overlap.

[0144] In one embodiment, an additional current collector (461, 465) and a lead tab (332) located in the area where the blank area (471) has been removed may be combined.

[0145] In one embodiment, referring to FIG. 7g, a positive lead tab (332) may be coupled (or attached) to one of the additional current collectors (461, 465) (e.g., additional current collector (461)). For example, the positive lead tab (332) may be electrically connected to at least one positive active material layer (453, 455) through the additional current collector (461, 465).

[0146] In one embodiment, the positive lead tab (332) can be joined to the additional current collector (461, 465) by welding it to the additional current collector (461, 465) in a portion that does not overlap with the positive electrode tab (322). For example, the positive lead tab (332) and the additional current collector (461, 465) may be melted and fused by frictional heat generated by ultrasonic vibration, and then the positive lead tab (332) may be welded onto the additional current collector (461, 465) through a cooling process. Alternatively, the positive lead tab (332) and the additional current collector (461, 465) may be melted and fused by high heat generated by a laser, and then the positive lead tab (332) may be welded onto the additional current collector (461, 465) through a cooling process. As the positive lead tab (332) is welded to the additional current collector (461, 465), beads (761, 762, 763, 764) may be present on the positive lead tab (332).

[0147] For example, the length between the location where the positive lead tab (332) is physically coupled to the additional current collector (461) and the boundary of the retention area (475) may be shorter than the length of the non-retaining area (471). In one embodiment, the positive lead tab (332) may be physically coupled to the additional current collector (461) in a portion that does not overlap with the positive electrode tab (322).

[0148] FIG. 8 is a drawing illustrating an electrode according to one embodiment. FIG. 9a is a drawing illustrating a jelly roll according to one embodiment. FIG. 9b is a drawing illustrating a cylindrical battery according to one embodiment.

[0149] Referring to FIG. 8, the positive electrode (812) may have one electrode tab. The positive electrode (812) of FIG. 8 may be a wider (or, extending in the width direction) electrode compared to the positive electrode (312) manufactured through the process illustrated in FIG. 7a through 7f.

[0150] In one embodiment, the additional current collector (461) can be joined to the positive electrode tab (322) of the positive electrode current collector (451) by welding it to the portion overlapping with the positive electrode tab (322). For example, the positive electrode (812) may have multiple beads (751, 752, 753, 754) created by welding the additional current collector (461) to the portion overlapping with the positive electrode tab (322) multiple times.

[0151] In one embodiment, the positive lead tab (332) may be coupled (or attached) to an additional current collector (461). For example, the positive lead tab (332) may be electrically connected to at least one positive active material layer through the additional current collector (461).

[0152] In one embodiment, the positive lead tab (332) can be joined to the additional current collector (461) by welding it to the additional current collector (461) in a portion that does not overlap with the positive electrode tab (322). For example, the positive lead tab (332) and the additional current collector (461) may be melted and fused by frictional heat generated by ultrasonic vibration, and then the positive lead tab (332) may be welded onto the additional current collector (461) through a cooling process. Alternatively, the positive lead tab (332) and the additional current collector (461) may be melted and fused by high heat generated by a laser, and then the positive lead tab (332) may be welded onto the additional current collector (461) through a cooling process. As the positive lead tab (332) is welded to the additional current collector (461), beads (761, 762, 763, 764) may be present on the positive lead tab (332).

[0153] For example, the length between the location where the positive lead tab (332) is physically coupled to the additional current collector (461) and the boundary of the retention area (475) may be shorter than the length of the non-retaining area (471). In one embodiment, the positive lead tab (332) may be physically coupled to the additional current collector (461) in a portion that does not overlap with the positive electrode tab (322).

[0154] With reference to FIG. 8, the positive electrode (812) has been described, but the structure of FIG. 8 may also be applied to the negative electrode. For example, the positive electrode (812) of FIG. 8 may be replaced with the negative electrode. For example, the retaining region (475) of FIG. 8 may be replaced with the retaining region of the negative electrode (e.g., 435 of FIG. 4a). For example, the non-retaining region (471) of FIG. 8 may be replaced with the non-retaining region of the negative electrode (311) (e.g., 431 of FIG. 4a). For example, the additional current collector (460) of FIG. 8 may be replaced with the additional current collector of the negative electrode (311) (e.g., 421, 425 of FIG. 4a). For example, the positive electrode tab (322) of FIG. 8 may be replaced with the negative electrode tab of the negative electrode (311) (e.g., 321 of FIG. 4a). For example, the negative lead tab (331) may be physically coupled to an additional current collector (421, 425) to be electrically connected to the active material layer by welding to an additional current collector (460). For example, the length between the location where the negative lead tab (331) is physically coupled to the additional current collector (421, 425) and the boundary of the holding area (435) may be shorter than the length of the unused area (431).

[0155] FIG. 9a is a drawing illustrating a jelly roll according to one embodiment. FIG. 9b is a drawing illustrating a cylindrical battery according to one embodiment.

[0156] Referring to FIG. 9a, the jelly roll (910) may be formed by rolling (or winding) (or rotating) the cathode electrode (911) (or cathode sheet) (or cathode plate), the anode electrode (912) (or anode sheet) (or anode plate), and separators (951, and 955) in a designated rotational direction (e.g., clockwise or counterclockwise). In one embodiment, the cathode electrode (911) may correspond to a cathode electrode of a structure corresponding to the anode electrode (312) described with reference to FIG. 7g. In one embodiment, the cathode electrode (911) may correspond to a cathode electrode of a structure corresponding to the anode electrode (812) described with reference to FIG. 8. In one embodiment, the anode electrode (912) may correspond to the anode electrode (312) described with reference to FIG. 7g. In one embodiment, the positive electrode (912) may correspond to the positive electrode (812) described with reference to FIG. 8.

[0157] For example, the jelly roll (910) may be formed by spirally rolling (or winding) with separators (951, 955) stacked between the negative electrode (911) and the positive electrode (912). For example, the jelly roll (910) may be formed by stacking and rolling (or winding) one negative electrode (911), one positive electrode (912), and two separators (951, 955). However, it is not limited thereto. Additionally, the jelly roll (910) may include two or more negative sheets, two or more positive sheets, and three or more separators.

[0158] In one embodiment, the separators (951, 955) can prevent the negative electrode (911) and the positive electrode (912) from coming into electrical contact with each other.

[0159] In one embodiment, referring to FIG. 9b, the case (960) of the battery (900) may accommodate a jelly roll (910) inside. In one embodiment, the case (960) may be referred to as a housing, can, or enclosure of the battery (900) in terms of forming the exterior of the battery (900). For example, the case (960) may have an approximately cylindrical shape.

[0160] In one embodiment, the case (960) may be formed of a conductive material through which current can flow. In one embodiment, the case (960) may include a first body (961) and a second body (962). The first body (961) may form a top portion (or lid) (or cap) of the case (960) to seal an opening of the second body (962). The first body (961) may also be referred to as a cover plate. The second body (962) may be formed in a cylindrical shape with an open portion that is sealed by the first body (961). The second body (962) may form a bottom portion and a side wall (or side) (or shell) of the case (960). The second body (962) may also be referred to as a battery body (or battery can body). An insulator (963) may be present between the first body (961) and the second body (962) so that the first body (961) and the second body (962) do not come into electrical contact with each other.

[0161] In one embodiment, the negative lead tab (931) can electrically connect the negative electrode (911) of the jelly roll (910) and the first body (961) of the case (960) (or at least a part of the first body (961)). The negative lead tab (931) may be formed in the shape of a rectangular strip. The negative lead tab (931) may be welded to the first body (961) of the case (960) (or at least a part of the first body (961)) (or the negative electrode (911)). Accordingly, the first body (961) may function as a negative electrode terminal of the battery (900). Hereinafter, at least a part of the first body (961) of the case (960) to which the negative lead tab (931) is electrically connected may be referred to as the negative electrode tab. In one embodiment, the cathode lead tab (931) may be electrically connected to the cathode electrode (911). In one embodiment, the cathode lead tab (931) may include a portion located on the first surface (or top surface) of the case (960). The cathode lead tab (931) may be electrically connected to the cathode electrode (911) by passing through the first surface (or top surface) of the case (960).

[0162] In one embodiment, the positive lead tab (932) can electrically connect the positive electrode (912) of the jelly roll (910) and the second body (962) of the case (960) (or at least a part of the second body (962)). The positive lead tab (932) may be formed in the shape of a rectangular strip. The positive lead tab (932) may be welded to the second body (962) of the case (960) (or at least a part of the second body (962)) (or the positive electrode (912)). Accordingly, the second body (962) may function as a positive electrode terminal of the battery (900). Hereinafter, at least a part of the second body (962) of the case (960) to which the positive lead tab (932) is electrically connected may be referred to as the positive electrode tab. In one embodiment, the positive lead tab (932) may be electrically connected to the positive electrode (912). In one embodiment, the positive lead tab (932) may include a portion located on the second surface (or bottom surface) of the case (960). The positive lead tab (932) may be electrically connected to the positive electrode (912) by passing through the second surface (or bottom surface) of the case (960).

[0163] The technical problems to be solved in this disclosure are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this disclosure pertains.

[0164] As described above, the battery (300) may include electrodes (311, 312) and lead tabs (331, 332) electrically connected to the electrodes (311, 312). The electrodes (311, 312) may include an active material layer (413, 453), a first current collector (411, 451), and a second current collector (420, 460). The first current collector (411, 451) may include a first portion (435, 475) disposed to overlap with the active material layer (413, 453) on at least one surface of the first current collector (411, 451), and a second portion (431, 471) protruding from the first portion (435, 475) of the first current collector (411, 451) without overlapping with the active material layer (413, 453). The second current collector (420, 460) may include a portion that overlaps with the second portion (431, 471) of the first current collector (411, 451), and another portion that does not overlap with the second portion (431, 471) of the first current collector (411, 451). The lead tab (331, 332) can be electrically connected to the electrode (312) through being coupled to the other part of the second current collector (420, 460). The first distance (525) from the first part (435, 475) of the first current collector (411, 451) to the position (530) where the lead tab (331, 332) is coupled to the other part of the second current collector (420, 460) may be shorter than the second distance (520) from the first part (435, 475) of the first current collector (411, 451) to the position where the second part (431, 471) of the first current collector (411, 451) is coupled to the part of the second current collector (420, 460).

[0165] In one embodiment, the second current collector (460) may include a first part (461) covering a first surface of the first current collector (451), and a second part (465) covering a second surface opposite to the first surface of the first current collector (451). The first part (461) may be coupled to the second part (465) at the portion where the second part (541) of the first current collector (451) and the second part (465) overlap each other.

[0166] The location where the lead tab (332) is coupled to the other area of ​​the second current collector (420, 460) can be distinguished from the location where the first part (461) is coupled to the second part (465).

[0167] The active material layer (453) may be disposed on one of the first surface and the second surface.

[0168] The above active material layer may include a first active material layer (453) disposed on the first surface and a second active material layer (455) disposed on the second surface.

[0169] The first current collector (451) may have a non-conductive layer and a conductive layer. The active material layer (453) may be placed on the conductive layer.

[0170] The non-conductive layer of the first current collector (451) may include a polyethylene layer.

[0171] The second current collector (460) and the conductive layer may be aluminum.

[0172] The first current collector (411, 451) may include a third portion (545) that protrudes from the first portion (435, 475) of the first current collector (451) and is spaced apart from the second portion (541) of the first current collector (451), without overlapping with the active material layer (453). The second current collector (420, 460) may be coupled to the second and third portions (541, 545). The lead tab (332) may be electrically coupled to the electrode (312) in a concave portion defined by the first, second, and third portions (475, 541, 545).

[0173] The battery (300) may include another electrode (311) having a polarity different from that of the electrode (312), and a separator that electrically separates the electrode (312) and the other electrode (311). The electrode (312), the separator (350), and the other electrode (311) may be sequentially stacked in the thickness direction of the battery (300).

[0174] The battery (300) may include another electrode (311) having a polarity different from that of the electrode (312), and a separator that electrically separates the electrode (312) and the other electrode (311). The electrode (312), the separator, and the other electrode (311) may be wound in a clockwise direction.

[0175] As described above, the electronic device (101) may include a battery (300) and an electronic component driven by power from the battery (300). The battery (300) may include electrodes (311, 312) and lead tabs (331, 332) electrically connected to the electrodes (311, 312). The electrodes (311, 312) may include an active material layer (413, 453), a first current collector (411, 451), and a second current collector (420, 460). The first current collector (411, 451) may include a first portion (435, 475) disposed to overlap with the active material layer (413, 453) on at least one surface of the first current collector (411, 451), and a second portion (431, 471) protruding from the first portion (435, 475) of the first current collector (411, 451) without overlapping with the active material layer (413, 453). The second current collector (420, 460) may include a portion that overlaps with the second portion (431, 471) of the first current collector (411, 451), and another portion that does not overlap with the second portion (431, 471) of the first current collector (411, 451). The lead tab (331, 332) can be electrically connected to the electrode (312) through being coupled to the other part of the second current collector (420, 460). The first distance (525) from the first part (435, 475) of the first current collector (411, 451) to the position (530) where the lead tab (331, 332) is coupled to the other part of the second current collector (420, 460) may be shorter than the second distance (520) from the first part (435, 475) of the first current collector (411, 451) to the position where the second part (431, 471) of the first current collector (411, 451) is coupled to the part of the second current collector (420, 460).

[0176] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs.

[0177] The electronic device according to the various embodiments disclosed in this document may be a device of various forms. The electronic device may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a consumer electronics device. The electronic device according to the embodiments of this document is not limited to the devices described above.

[0178] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said 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 said items unless the relevant context clearly indicates otherwise. In this document, each of 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" may 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 a component from another component and do not limit the components in any other aspect (e.g., importance or order). Where any component (e.g., the first) is referred to as "coupled" or "connected" to another component (e.g., the second), with or without the terms "functionally" or "communicationally," it means that said component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0179] The term “module” as used in the 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, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof 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).

[0180] According to various embodiments, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to various embodiments, one or more of the components or operations among the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to various embodiments, operations performed by the module, program, or other components 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.

Claims

1. In the battery (300), Electrodes (311, 312), and It includes lead tabs (331, 332) electrically connected to the electrodes (311, 312), and The above electrodes (311, 312) are, Active material layer (413, 453), The first entire house (411, 451), and Includes the second collector (420, 460), The above first collector (411, 451) is, A first portion (435, 475) disposed to overlap the active material layer (413, 453) on at least one surface of the first current collector (411, 451), and It includes a second portion (431, 471) that protrudes from the first portion (435, 475) of the first current collector (411, 451) without overlapping with the active material layer (413, 453), The above second collector (420, 460) is, A portion overlapping with the second portion (431, 471) of the first current collector (411, 451), and It includes another part that does not overlap with the second part (431, 471) of the first current collector (411, 451), and The lead tabs (331, 332) are electrically connected to the electrode (312) through being coupled to the other part of the second current collector (420, 460), and The first distance (525) from the first part (435, 475) of the first current collector (411, 451) to the position (530) where the lead tab (331, 332) is coupled to the other part of the second current collector (420, 460) is shorter than the second distance (520) from the first part (435, 475) of the first current collector (411, 451) to the position where the second part (431, 471) of the first current collector (411, 451) is coupled to the part of the second current collector (420, 460). battery.

2. In Claim 1, The above second collector (460) is, A first part (461) covering the first surface of the first collector (451), and It includes a second part (465) covering a second surface opposite to the first surface of the first collector (451), and The first part (461) is coupled to the second part (465) at the portion where the second part (431, 471) and the second part (465) of the first collector (451) overlap each other. battery.

3. In Claim 2, The position where the lead tab (332) is coupled to the other area of ​​the second current collector (420, 460) is distinguished from the position where the first part (461) is coupled to the second part (465). battery.

4. In Claim 2, The above active material layer (453) is disposed on one of the first surface and the second surface, battery.

5. In Claim 2, The above active material layer is, A first active material layer (453) disposed on the first surface, and A second active material layer (455) disposed on the second surface, battery.

6. In any one of claims 1 to 5, The first current collector (451) above has a non-conductive layer and a conductive layer, The above active material layer (453) is disposed on the conductive layer, battery.

7. In Claim 6, The non-conductive layer of the first current collector (451) comprises a polyethylene layer. battery.

8. In Claim 6, The second current collector (460) and the conductive layer above comprise aluminum, battery.

9. In any one of claims 1 to 8, The above first collector (411, 451) is, It includes a third part (545) that is not overlapped with the active material layer (453), protrudes from the first part (435, 475) of the first current collector (451), and is spaced apart from the second part (541) of the first current collector (451). The second current collector (420, 460) is combined with the second and third parts (541, 545), and The lead tab (332) is electrically coupled to the electrode (312) in a concave portion defined by the first, second, and third portions (475, 541, 545). battery.

10. In any one of claims 1 to 9, Another electrode (311) having a different polarity from the above electrode (312), and It includes a separator (350) that electrically separates the above electrode (312) and the other electrode (311), and The electrode (312), the separator (350), and the other electrode (311) are sequentially stacked in the thickness direction of the battery (300). battery.

11. In any one of claims 1 to 10, Another electrode (311) having a different polarity from the above electrode (312), and It includes a separator (350) that electrically separates the above electrode (312) and the other electrode (311), and The electrode (312), the separator (350), and the other electrode (311) are wound clockwise. battery.

12. In the electronic device (101), Battery (300), and It includes an electronic component driven by power from the battery (300), The above battery (300) is, Electrodes (311, 312), and It includes lead tabs (331, 332) electrically connected to the electrodes (311, 312), and The above electrodes (311, 312) are, Active material layer (413, 453), The first entire house (411, 451), and Includes the second collector (420, 460), The above first collector (411, 451) is, A first portion (435, 475) disposed to overlap the active material layer (413, 453) on at least one surface of the first current collector (411, 451), and It includes a second portion (431, 471) that protrudes from the first portion (435, 475) of the first current collector (411, 451) without overlapping with the active material layer (413, 453), The above second collector (420, 460) is, A portion overlapping with the second portion (431, 471) of the first current collector (411, 451), and It includes another part that does not overlap with the second part (431, 471) of the first current collector (411, 451), and The lead tabs (331, 332) are electrically connected to the electrode (312) through being coupled to the other part of the second current collector (420, 460), and The first distance (525) from the first part (435, 475) of the first current collector (411, 451) to the position (530) where the lead tab (331, 332) is coupled to the other part of the second current collector (420, 460) is shorter than the second distance (520) from the first part (435, 475) of the first current collector (411, 451) to the position where the second part (431, 471) of the first current collector (411, 451) is coupled to the part of the second current collector (420, 460). Electronic device.

13. In Claim 12, The above second collector (460) is, A first part (461) covering the first surface of the first collector (451), and It includes a second part (465) covering a second surface opposite to the first surface of the first collector (451), and The first part (461) is coupled to the second part (465) at the portion where the second part (431, 471) and the second part (465) of the first collector (451) overlap each other. Electronic device.

14. In Claim 13, The position where the lead tab (332) is coupled to the other area of ​​the second current collector (420, 460) is distinguished from the position where the first part (461) is coupled to the second part (465). Electronic device.

15. In Claim 13, The above active material layer (453) is disposed on one of the first surface and the second surface, Electronic device.

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