A power management circuit

Abstract

A power management circuit for an electronic device. The circuit can include a battery (410) for providing a variable current to drive a load device (430), and a processing circuit (420) electrically connected to the battery (410) by a wire. The processing circuit (420) can be configured to detect a voltage applied to the processing circuit (420), and to power down the load device (430) in response to detecting that the voltage applied to the processing circuit (420) is less than a threshold. The voltage applied to the processing circuit (420) can depend on a battery (410) voltage of the battery (410), and a voltage drop caused by the variable current and a resistance of the wire from the battery (410). Changes in the voltage applied to the processing circuit (420) can lag changes in the variable current.

Description

Technical Field

[0001] This specification generally relates to a circuit for power management in electronic devices, and more specifically, to a circuit for managing power supplied by a battery in an electronic device. Background Technology

[0002] With the development of science and technology, electronic devices are becoming increasingly prevalent in people's lives. Typically, electronic devices (such as wireless headphones, mobile phones, and smart glasses) are powered by batteries so users can use them at any time. In some cases, once the battery is depleted or nearly depleted, the electronic device may be forced to shut down, potentially damaging the battery. Furthermore, forced shutdowns of electronic devices can also lead to a poor user experience. Therefore, there is a need for a circuit to better manage battery power and improve the user experience of electronic devices. Summary of the Invention

[0003] According to a first aspect of this specification, a circuit is provided for preventing an electronic device from shutting down due to excessive current consumption. The circuit may include a battery for providing the current consumption to drive a load device. The circuit may include a protection circuit electrically connected to the battery and for protecting the battery from abnormal conditions. The circuit may further include a processing circuit electrically connected to the battery via a wire. The processing circuit may be configured to detect a voltage applied to the processing circuit and, in response to detecting that the voltage applied to the processing circuit is less than a threshold, shut down the load device. The voltage applied to the processing circuit may depend on the battery voltage and the voltage drop caused by the current consumption and the resistance from the battery, the protection circuit, and the wire.

[0004] In some embodiments, the battery voltage varies with the battery's capacity percentage.

[0005] In some embodiments, the resistance from the battery includes a first resistance less than 200 mΩ.

[0006] In some embodiments, the resistor from the protection circuit includes a second resistor, which is between 10 mΩ and 50 mΩ.

[0007] In some embodiments, the resistance from the wire includes a third resistance less than 0.8 Ω / m.

[0008] In some embodiments, the wire is coated with tin or silver.

[0009] In some embodiments, the diameter of the wire is between 0.1 mm and 0.5 mm.

[0010] In some embodiments, the load device includes an electroacoustic element.

[0011] In some embodiments, the abnormal condition includes at least one of the following: battery overcharging, battery over-discharging, or battery overcurrent.

[0012] According to a second aspect of the present invention, an electronic device is provided, including circuitry for preventing the electronic device from shutting down due to excessive current consumption. The circuitry may include a battery for providing the current consumption to drive a load device. The circuitry may include a protection circuit electrically connected to the battery and for protecting the battery from abnormal conditions. The circuitry may further include a processing circuit electrically connected to the battery via a wire. The processing circuitry may be configured to detect a voltage applied to the processing circuitry and, in response to detecting that the voltage applied to the processing circuitry is less than a threshold, shut down the load device. The voltage applied to the processing circuitry may depend on the battery voltage and the voltage drop caused by the current consumption and the resistance from the battery, the protection circuitry, and the wires.

[0013] According to a third aspect of this specification, a circuit is provided for preventing an electronic device from shutting down due to excessive current consumption. The circuit may include a battery for providing a variable current to drive a load device. The circuit may also include processing circuitry electrically connected to the battery via wires. The processing circuitry may be configured to detect a voltage applied to the processing circuitry and, in response to detecting that the voltage applied to the processing circuitry is less than a threshold, shut down the load device. The voltage applied to the processing circuitry may depend on the battery voltage and the voltage drop caused by the variable current and the resistance from the battery and the wires. Changes in the voltage applied to the processing circuitry may lag behind changes in the variable current.

[0014] In some embodiments, the processing circuit includes a voltage detection unit for detecting the voltage applied to the processing circuit, and the circuit further includes a capacitor and a resistor, wherein: a first end of the resistor is electrically connected to an input terminal of the processing circuit, and a second end of the resistor is electrically connected to the capacitor; the voltage detection unit is electrically connected to a point between the resistor and the capacitor.

[0015] In some embodiments, the hysteresis time is related to the product of the resistance of the resistor and the capacitance of the capacitor.

[0016] In some embodiments, the circuit includes a capacitor and a diode, wherein: the anode of the diode is electrically connected to the load device, and the cathode of the diode is electrically connected to the processing circuit; the capacitor is electrically connected to the cathode of the diode; and the processing circuit is electrically connected to a point between the diode and the capacitor to detect the voltage applied to the processing circuit.

[0017] In some embodiments, the hysteresis time is related to the capacitance of the capacitor.

[0018] In some embodiments, the load device includes an electroacoustic element.

[0019] According to a fourth aspect of this specification, an electronic device is provided, including a circuit for preventing the electronic device from shutting down due to excessive current consumption. The circuit may include a battery for providing a variable current to drive a load device. The circuit may further include processing circuitry electrically connected to the battery via wires. The processing circuitry may be configured to detect a voltage applied to the processing circuitry and, in response to detecting that the voltage applied to the processing circuitry is less than a threshold, shut down the load device. The voltage applied to the processing circuitry may depend on the battery voltage and a voltage drop caused by the variable current and resistance from the battery and the wires. Changes in the voltage applied to the processing circuitry may lag behind changes in the variable current.

[0020] Additional features will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and accompanying drawings, or may be learned by the generation or operation of embodiments. The features of this specification may be realized and obtained by practice or use of various aspects of the methods, tools, and combinations set forth in the embodiments discussed below. Attached Figure Description

[0021] This application will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0022] Figure 1 This is a schematic diagram of an exemplary power management system 100 according to some embodiments of this specification;

[0023] Figure 2 These are schematic diagrams of exemplary circuits of electronic devices according to some embodiments of this specification;

[0024] Figure 3 This is a schematic diagram of an exemplary protection circuit for a battery according to some embodiments of this specification;

[0025] Figure 4 This is a block diagram of an exemplary electronic device with a battery according to some embodiments of this specification;

[0026] Figure 5 These are schematic diagrams of exemplary circuits of electronic devices shown according to some embodiments of this specification; and

[0027] Figure 6 This is a schematic diagram of an exemplary circuit of an electronic device according to some embodiments of this specification. Detailed Implementation

[0028] In the following detailed description, numerous specific details are set forth by way of example to provide a thorough understanding of the relevant application. However, it should be understood that those skilled in the art can practice this application without these details. In other instances, known methods, processes, systems, components, and / or circuits have been described at a relatively high level without detailed description to avoid unnecessarily obscuring various aspects of this specification. It will be apparent to those skilled in the art that various modifications can be made to the disclosed embodiments. Furthermore, the general principles defined herein can be applied to other embodiments and application scenarios without departing from the principles and scope of this application. Therefore, this application is not limited to the disclosed embodiments but should be given the broadest scope consistent with the claims.

[0029] The terminology used herein is for the purpose of describing specific illustrative embodiments only and is not intended to be limiting. As indicated in this application and the claims, unless the context clearly indicates otherwise, words such as "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. It should be understood that the terms "comprising" and "including" as used herein refer only to explicitly identified features, integers, steps, operations, elements, and / or components, and do not exclude the presence and addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0030] It should be understood that the terms "system," "engine," "unit," "module," and / or "block," etc., used in this application are one way to distinguish hierarchical relationships between different parts, components, parts, sections, or components. However, these terms may be replaced by other expressions if the same purpose can be achieved.

[0031] Generally, as used herein, "module," "unit," or "block" refers to logic or a set of software instructions stored in hardware or firmware. The modules, units, or blocks described herein may be implemented in software and / or hardware, or stored in any non-transitory computer-readable medium or other storage device. In some embodiments, software modules / units / blocks may be compiled and linked into an executable program. It should be understood that software modules may be invoked from other modules / units / blocks or themselves, and / or may be invoked in response to a detected event or interrupt. Software modules / units / blocks for execution on a computing device may be provided on a computer-readable medium such as an optical disc, digital video disc, flash drive, magnetic disk, or any other tangible medium, or as a digital download (which may be stored in a compressed or installable format and requires installation, decompression, or decryption before execution). Such software code may be stored, partially or entirely, on a storage device executing the computing device for execution by the computing device. Software instructions may be embedded in firmware, such as erasable programmable read-only memory (EPROM). It should be further understood that hardware modules / units / blocks can be included in logical components such as gates and flip-flops, and / or can be included in programmable units such as programmable gate arrays or processors. The modules / units / blocks or computing device functions described herein can be implemented as software modules / units / blocks, but can be represented in hardware or firmware. Typically, the modules / units / blocks described herein are logical modules / units / blocks, not limited by their specific physical form or memory. This module / unit / block can be combined with other modules / units / blocks, or divided into multiple sub-modules / sub-units / sub-blocks. This description can apply to a system, an engine, or a part thereof.

[0032] Unless otherwise expressly indicated, it should be understood that when a unit, engine, module, or block is referred to as being "located in," "connected to," or "coupled to" another unit, engine, module, or block, said unit, engine, module, or block may be directly located in, connected to, coupled to, or connected to the other unit, engine, module, or block, or there may be intermediate units, engines, modules, or blocks. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed terms.

[0033] The features and characteristics described in this application, the functions and operating methods of the components of the related structures, and the economic efficiency of the combination and manufacture of the parts will become more apparent from the following description of the accompanying drawings, all of which constitute a part of this application. However, it should be understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this application. It should also be understood that the drawings are not drawn to scale.

[0034] In one aspect of this specification, a circuit is provided for preventing an electronic device from shutting down due to excessive current consumption. The circuit may include a battery for providing the current consumption to drive a load device. The circuit may include a protection circuit electrically connected to the battery and for protecting the battery from abnormal conditions. The circuit may also include a processing circuit electrically connected to the battery via a wire. The processing circuit can be used to detect a voltage applied to the processing circuit and, in response to detecting that the voltage applied to the processing circuit is less than a threshold, to shut down the load device. The voltage applied to the processing circuit may depend on the battery voltage and the voltage drop caused by the current consumption and the resistance from the battery, the protection circuit, and the wire. For example, the voltage applied to the processing circuit may be equal to the difference between the battery voltage and the voltage drop. Therefore, to reduce the probability of the electronic device shutting down due to excessive current consumption, the resistance of the battery, the protection circuit, and the wire can be set as small as possible to reduce the resulting voltage drop, and the voltage applied to the processing circuit can be made as large as possible (e.g., as close as possible to the battery voltage).

[0035] In another aspect of this specification, the circuit may include a battery for providing a variable current (also known as a variable current draw) to drive a load device. The circuit may also include processing circuitry electrically connected to the battery via wires. The processing circuitry may be used to detect a voltage applied to the processing circuitry and, in response to detecting that the voltage applied to the processing circuitry is less than a threshold, to de-energize the load device. The voltage applied to the processing circuitry may depend on the battery voltage and the voltage drop caused by the variable current and the resistance from the battery and the wires.

[0036] In some embodiments, changes in the voltage applied to the processing circuit may lag behind changes in the variable current. For illustrative purposes, the current consumed by the electronic device (i.e., the variable current) can vary at different points in time. For example, in the case where the load device is an electroacoustic element (such as the transducer of headphones), the current consumed by the electronic device can increase instantaneously at one moment to increase the volume of the output sound, and decrease at the next moment to decrease the output volume. According to the circuit of this specification, when the current consumed by the electronic device suddenly increases, the voltage applied to the processing circuit may not drop immediately, but rather decrease at a slower rate, creating a delay relative to the change in current consumption. Then, when the current consumed by the electronic device decreases at the next moment, the voltage applied to the processing circuit will increase accordingly. Therefore, the voltage applied to the processing circuit can increase at the next moment before it falls below a threshold, avoiding power-off of the electronic device due to a sudden increase in the current consumed by the electronic device.

[0037] Figure 1This is a schematic diagram of an exemplary power management system 100 according to some embodiments of this specification. The power management system 100 may include an electronic device 110, a server 120, a terminal device 130, a storage device 140, and a network 150.

[0038] Electronic device 110 can be any battery-powered device. In some embodiments, electronic device 110 may include headphones 110-1, smart glasses 110-2, unmanned aerial vehicle (UAV) 110-3, etc., or any combination thereof. In some embodiments, headphones 110-1 may include over-ear headphones, ear-hook headphones, in-ear headphones, hybrid rotating headphones, open-back headphones, etc., or any combination thereof. In some embodiments, smart glasses 110-2 may include virtual reality glasses, augmented reality glasses, glasses with headphones, etc., or any combination thereof. For example, virtual reality glasses and / or augmented reality glasses may include Google Glass, Oculus Rift, HoloLens, Gear VR, etc.

[0039] In some embodiments, server 120 may be a single server or a group of servers. The server group may be centralized (e.g., a data center) or distributed (e.g., server 120 may be a distributed system). In some embodiments, server 120 may be local or remote. For example, server 120 may access information and / or data stored in terminal device 130 and / or storage device 140 via network 150. As another example, server 120 may directly connect to terminal device 130 and / or storage device 140 to access stored information and / or data. In some embodiments, server 120 may be implemented on a cloud platform. By way of example only, a cloud platform may include private cloud, public cloud, hybrid cloud, community cloud, distributed cloud, cross-cloud, multi-cloud, etc., or any combination thereof.

[0040] In some embodiments, server 120 may include processing device 122. Processing device 122 may process information and / or data related to electronic device 110 described herein. For example, processing device 122 may transmit battery information, such as battery status and battery update information, to electronic device 110 or terminal device 130 connected to electronic device 110. In some embodiments, processing device 122 may include one or more processing engines (e.g., a single-core processing engine or a multi-core processor). By way of example only, processing device 122 may include a central processing unit (CPU), application-specific integrated circuit (ASIC), application-specific instruction set processor (ASIP), graphics processing unit (GPU), physical processing unit (PPU), digital signal processor (DSP), field-programmable gate array (FPGA), programmable logic device (PLD), controller, microcontroller unit, reduced instruction set computer (RISC), microprocessor, etc., or any combination thereof.

[0041] Terminal device 130 can connect to electronic device 110 via wired or wireless means. Terminal device 130 can receive operational information from electronic device 110, such as battery usage and the operational status of one or more circuits of electronic device 110. Exemplary battery usage information may include current capacity percentage, battery lifespan, and battery performance logs. Furthermore, terminal device 130 can send instructions to electronic device 110 to operate electronic device 110 according to user commands. Instructions may include, for example, turning electronic device 110 on / off, adjusting the volume of electronic device 110, etc. In some embodiments, terminal device 130 may include mobile device 130-1, computer 130-2, wearable device 130-3, etc., or any combination thereof. In some embodiments, mobile device 130-1 may include smart home devices, smart mobile devices, virtual reality devices, augmented reality devices, etc., or any combination thereof. In some embodiments, smart home devices may include smart lighting devices, smart appliance control devices, smart monitoring devices, smart TVs, smart cameras, walkie-talkies, etc., or any combination thereof. In some embodiments, smart mobile devices may include smartphones, personal digital assistants (PDAs), gaming devices, navigation devices, point-of-sale (POS) devices, etc., or any combination thereof. In some embodiments, virtual reality (VR) devices and / or augmented reality (AR) devices may include VR headsets, VR glasses, VR patches, AR headsets, AR glasses, AR patches, etc., or any combination thereof. For example, VR devices and / or AR devices may include Google Glass, Oculus Rift, HoloLens, Gear VR, etc. In some embodiments, wearable devices 130-3 may include smart bracelets, smart shoes, smart glasses, smart headsets, smartwatches, smart clothing, smart backpacks, smart accessories, etc., or any combination thereof.

[0042] Storage device 140 can store data and / or instructions. For example, storage device 140 can store volume control instructions, speed control instructions, audio data, and other data. In some embodiments, storage device 140 can store data obtained from terminal device 130 and / or electronic device 110. In some embodiments, storage device 140 can store data and / or instructions that server 120 can execute or use. In some embodiments, storage device 140 may include mass storage devices, removable storage devices, volatile read-write memory, read-only memory (ROM), etc., or any combination thereof. Exemplary mass storage devices may include disks, optical disks, solid-state drives, etc. Exemplary removable storage devices may include flash drives, floppy disks, optical disks, memory cards, compact disks, magnetic tapes, etc. Exemplary volatile read-write memory may include random access memory (RAM). Exemplary RAM may include dynamic RAM (DRAM), double data rate synchronous dynamic RAM (DDR SDRAM), static RAM (SRAM), thyristor RAM (T-RAM), and zero-capacitance RAM (Z-RAM), etc. Exemplary ROMs may include mask ROMs (MROMs), programmable ROMs (PROMs), erasable programmable ROMs (EPROMs), electrically erasable programmable ROMs (EEPROMs), optical disc ROMs (CD-ROMs), and digital multifunction disk ROMs, etc. In some embodiments, the storage device 140 may be implemented on a cloud platform. By way of example only, the cloud platform may include private cloud, public cloud, hybrid cloud, community cloud, distributed cloud, cross-cloud, multi-cloud, etc., or any combination thereof.

[0043] In some embodiments, storage device 140 may be connected to network 150 to communicate with one or more components of power management system 100 (e.g., electronic device 110, server 120, and terminal device 130). One or more components of power management system 100 may access data or instructions stored in storage device 140 via network 150. In some embodiments, storage device 140 may be directly connected to or communicate with one or more components of power management system 100 (e.g., electronic device 110, server 120, and terminal device 130). In some embodiments, storage device 140 may be part of server 120.

[0044] Network 150 can facilitate the exchange of information and / or data. In some embodiments, one or more components of the power management system 100 (e.g., electronic device 110, server 120, terminal device 130, and storage device 140) can transmit information and / or data through network 150 to other components of the power management system 100. In some embodiments, network 150 can be any type of wired or wireless network, or any combination thereof. By way of example only, network 150 may include cable networks, wired networks, fiber optic networks, telecommunications networks, intranets, the Internet, local area networks (LANs), wide area networks (WANs), wireless local area networks (WLANs), metropolitan area networks (MANs), public switched telephone networks (PSTNs), Bluetooth networks, ZigBee networks, near field communication (NFC) networks, and any combination thereof. In some embodiments, network 150 may include one or more network access points. For example, network 150 may include wired or wireless network access points, such as base stations and / or Internet switching points, through which one or more components of the power management system 100 can connect to network 150 to exchange data and / or information.

[0045] Those skilled in the art will understand that when the elements (or components) of the power management system 100 are executed, the elements can perform their functions via electrical signals and / or electromagnetic signals. For example, when electronic device 110 sends an audio signal to server 120, the processing circuitry of electronic device 110 can generate an electrical signal that encodes the audio signal. The processing circuitry of electronic device 110 can then transmit the electrical signal to an output port. If electronic device 110 communicates with server 120 via a wired network, the output port can be physically connected to a cable, which can further transmit the electrical signal to an input port of server 120. If electronic device 110 communicates with server 120 via a wireless network, the output port of electronic device 110 can be one or more antennas that convert electrical signals into electromagnetic signals. Within electronic device 110, when the processing circuitry processes instructions, issues instructions, and / or performs actions, the instructions and / or actions are performed via electrical signals. For example, when the processing circuitry retrieves or saves data from a storage medium, it can send electrical signals to a read / write device of the storage medium, which can read or write structured data in the storage medium. Structured data can be transmitted to the processing circuit in the form of electrical signals via the bus of electronic device 110. Here, an electrical signal can refer to a single electrical signal, a series of electrical signals, and / or multiple discrete electrical signals.

[0046] Figure 2 These are schematic diagrams of exemplary circuits of electronic devices according to some embodiments of this specification. Figure 2 As shown, circuit 200 may include battery 210, processing circuit 220, load device 230 and protection circuit 240.

[0047] Battery 210 can be used to provide power to processing circuitry 220, load device 230, and / or protection circuitry 240 via one or more wires. Power can be delivered externally to battery 210 as current and / or voltage. For example, battery 210 can provide consuming current to drive load device 230. As another example, battery 210 can provide voltage to processing circuitry 220 to support signal processing. In some embodiments, battery 210 may include lithium-ion batteries, lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, etc., or combinations thereof. In some embodiments, wires can transmit data signals from processing circuitry 220 to load device 230 or any other device (e.g., terminal device 130, storage device 140). In some embodiments, wires may be made of copper, silver, tin, aluminum, iron, nickel, zinc, etc., or any combination thereof. For example, wires may be copper wire coated with tin or silver.

[0048] The battery voltage of battery 210 can vary with the capacity percentage of battery 210. In some cases, the battery voltage of battery 210 can be directly proportional to the capacity percentage of battery 210. The higher the capacity percentage of battery 210, the higher the battery voltage of battery 210 may be. For example, when the capacity percentage of battery 210 is 100%, the battery voltage of battery 210 may be at its maximum value (e.g., 4.2V). When the capacity percentage of battery 210 is less than 20%, the battery voltage of battery 210 may drop to a value lower than the maximum value (e.g., 2.5V). Battery 210 may have an internal resistance 212 (also referred to as a first resistor) that shares a portion of the battery voltage when battery 210 provides consumed current to load device 230. Therefore, the output voltage of battery 210 may be lower than the battery voltage of battery 210. In some embodiments, the internal resistance 212 of battery 210 may depend on the size, chemistry, temperature, and discharge current (i.e., the total current flowing through the battery, which includes...) of battery 210. Figure 2 (e.g., current consumption under certain conditions).

[0049] Processing circuit 220 can control the operation of the load device. In some embodiments, processing circuit 220 may include voltage detection unit 222 for detecting the voltage applied to processing circuit 220. In some embodiments, the voltage applied to processing circuit 220 may depend on the battery voltage of battery 210 and the voltage drop caused by the current draw of various resistors derived from circuit 200 (e.g., battery 210, protection circuit 240, and / or wires). In some embodiments, processing circuit 220 may power off load device 230 in response to detecting that the voltage applied to processing circuit 220 is less than a threshold. The threshold may be a fixed value or associated with the battery voltage of battery 210. For example, the threshold may not exceed 50%, 55%, 60%, 65%, 70%, or 75% of the maximum battery voltage of battery 210. In some embodiments, processing circuit 220 and load device 230 may be connected in series or in parallel.

[0050] The load device 230 can be a device powered by electricity from the battery 210. In some embodiments, the load device 230 may include electroacoustic elements, power elements, etc., or any combination thereof. The electroacoustic elements may include transducers that generate sound. The power elements may include electric motors, etc., that provide kinetic energy. The load device 230 can be integrated into different electronic devices. For example, the load device 230 can be integrated into headphones, mobile phones, smart glasses, drones, etc.

[0051] By way of example only, load device 230 could be a headphone transducer that converts electrical signals into sound signals. In this regard, the current consumption of load device 230 could vary depending on the content played by the headphones. For example, headphones might need to output sound at different volumes (e.g., a song may have different volumes at different times), so the current consumption of load device 230 would vary over time. The louder the output sound, the greater the current consumption of load device 230 might be. As another example, load device 230 could be an electric motor that drives a device (e.g., a UAV) to move at different speeds. In this case, the higher the speed, the greater the current consumption of load device 230 might be.

[0052] Protection circuit 240 can be used to protect battery 210 from abnormal conditions. In some embodiments, abnormal conditions may include at least one of overcharging, over-discharging, or overcurrent of battery 210. In some embodiments, protection circuit 240 may include one or more components, such as a protection integrated circuit (IC), one or more resistors, one or more capacitors, one or more switches, etc. Therefore, under normal operating conditions of circuit 200, when battery 210 provides current to load device 230, a second resistor can be obtained from protection circuit 240, which can share another portion of the battery voltage. Further description of the structure of protection circuit 240 can be found elsewhere in this specification (e.g., Figure 3 (and its description).

[0053] In some embodiments, the overcurrent protection point of the protection circuit 240 may be associated with a second resistance of the protection circuit 240. As used herein, the overcurrent protection point refers to a current value above which the battery 210 can disconnect the load device 230. The lower the second resistance of the protection circuit 240, the higher the overcurrent protection point may be. This is because the current flowing through the protection circuit 240 can cause a voltage drop in the protection circuit 240 due to the following equation (1).

[0054] U = IR, (1)

[0055] Where U represents the voltage drop of protection circuit 240, I represents the current flowing through protection circuit 240, and R represents the second resistance of protection circuit 240. Protection circuit 240 can detect the voltage drop to determine whether the overcurrent protection point has been reached. For example, protection circuit 240 will only disconnect load device 230 when the voltage drop detected by protection circuit 240 is greater than 0.24V. According to equation (1), a decrease in the second resistance may lead to an increase in the overcurrent protection point. For example, if the second resistance is 200mΩ, the overcurrent protection point can be determined to be 1.2A. If the second voltage of protection circuit 240 decreases to 100mΩ, the overcurrent protection point of protection circuit 240 can be increased to 2.4A.

[0056] As described above, when the processing circuit 220 detects that the voltage applied to it is less than a threshold, the processing circuit 220 can power off the load device 230. In some embodiments, to prevent the load device 230 from being powered off when the current consumption of the load device 230 suddenly increases (meaning that the first resistor, the second resistor, etc., can share more of the battery voltage, resulting in a smaller voltage applied to the processing circuit 220), the first resistance of the battery 210, the second resistance of the protection circuit 240, and / or the resistance of the wires (also referred to as the third resistance) can be made as small as possible. In some embodiments, by selecting the material of the battery 210 and optimizing the structure, the first resistance of the battery 210 can be set to less than 200mΩ. For example, the first resistance of the battery 210 can be set to less than 190mΩ, 180mΩ, 170mΩ, 160mΩ, or 150mΩ. In some embodiments, by simplifying the circuit structure of the protection circuit 240, the second resistance of the protection circuit 240 can be set between 10mΩ and 50mΩ. For example, the second resistance can be between 15mΩ and 45mΩ, or between 20mΩ and 40mΩ, or between 25mΩ and 35mΩ, etc. Alternatively, the second resistance can be 50mΩ, 48mΩ, 43mΩ, 58mΩ, 33mΩ, 30mΩ, 28mΩ, 23mΩ, 18mΩ, 13mΩ, etc. In some embodiments, by selecting the material of the wire and adjusting the configuration of the wire, the third resistance of the wire can be set to less than 0.8Ω / m. For example, the wire can be made of a more conductive material (e.g., copper, silver) and have a thicker diameter, thereby setting the third resistance of the wire to no more than 0.7Ω / m, 0.6Ω / m, 0.5Ω / m, 0.45Ω / m, 0.4Ω / m, 0.35Ω / m, 0.3Ω / m, 0.25Ω / m, 0.2Ω / m, etc. In some embodiments, the diameter of the wire can be between 0.1mm and 0.5mm. For example, the diameter of the wire can be 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, etc. In some other embodiments, the third resistance of the wire can be further reduced by coating it with one or more layers of a specific material (e.g., tin or silver).

[0057] It should be noted that the above description is for illustrative purposes only and is not intended to limit the scope of this specification. Various changes and modifications can be made by those skilled in the art based on the teachings of this specification. However, these changes and modifications do not depart from the scope of this specification. In some embodiments, one or more components may be omitted and / or one or more additional components may be added to circuit 200. For example, circuit 200 may include a first load device connected in series with processing circuit 220 and a second load device connected in parallel with processing circuit 220. As another example, protection circuit 240 may be removed from circuit 200.

[0058] Figure 3 This is a schematic diagram of an exemplary protection circuit for a battery according to some embodiments of this specification. The protection circuit 240 can be electrically connected to the battery 210 via one or more wires and can be used to protect the battery 210 from abnormal conditions, thereby preventing damage to the battery 210. In some embodiments, abnormal conditions may include at least one of overcharging, over-discharging, or overcurrent of the battery 210. (Refer to...) Figure 3 The protection circuit 240 may include a protection integrated chip (IC) 310, a first resistor 320, a second resistor 330, a capacitor 340, a first switching element 350, and a second switching element 360.

[0059] The protection integrated chip 310 can be used to detect the battery voltage and / or battery current of the battery 210 during charging and / or discharging. The protection integrated chip 310 can be connected to the positive terminal of the battery 210 via a first input pin 11 and to the negative terminal of the battery 210 via a second input pin 12, serving as a reference point for the protection integrated chip 310. In some embodiments, to filter out interference signals from the battery voltage of the battery 210, the protection circuit 240 may further include an RC filter circuit consisting of a first resistor 320 and a capacitor 340.

[0060] The protection integrated chip 310 can be used to control a first switching element 350 and / or a second switching element 360 based on battery voltage and / or battery current, thereby controlling the current flowing into and / or out of the battery. In some embodiments, the first switching element 350 may include a first negative metal-oxide-semiconductor field-effect transistor (NMOS FET) 352 and a first diode 354, and the second switching element 360 may include a second NMOS FET 362 and a second diode 364. The gate of the first switching element 350 may be connected to an over-discharge control output pin 23 of the protection integrated chip 310. The gate of the second switching element 360 may be connected to an overcharge control output pin 22. The first switching element 350 and the second switching element 360 may be connected in series between the battery 210 and terminal 380, so that they can control the power supply from the battery 210 to a load device (e.g., an electroacoustic component), or the power supply from the charger to the battery 210 when the battery 210 is charging. Specifically, the first diode 354 may be forward connected between the source and drain of the first switching element 350. Accordingly, the second diode 364 can be forward-biased between the source and drain of the second switching element 360. In some embodiments, the protection integrated chip 310 can also be used to detect the discharge current of the battery 210 via the overcurrent control output pin 21. The overcurrent control output pin 21 of the protection integrated chip 310 can be connected to one end of the second resistor 330, and the other end can be connected to the other end of the second resistor 330. One end of the second resistor 330 can be connected to terminal 380.

[0061] During charging, current can flow through the first switching element 350, regardless of the value of the control signal at the gate of the first switching element 350, and charging can be controlled by the second switching element 360. Specifically, during the charging of the battery 210 by the charger, the battery voltage of the battery 210 can gradually increase. When the protection integrated chip 310 detects that the battery voltage is higher than a first voltage threshold (i.e., the overcharge protection point), the protection integrated chip 310 can send a control signal to the second switching element 360 through the overcharge control output pin 22 to disconnect the second switching element 360, thereby disconnecting the charger from the battery 210. In this case, the battery 210 can discharge through the diode 364 until the battery voltage equals the voltage detected by the protection integrated chip 310, at which point the second switching element 360 can be turned on.

[0062] During discharge, current can flow through the second switching element 360, regardless of the value of the control signal at the gate of the second switching element 360, and the discharge can be controlled by the first switching element 350. Specifically, as the battery 210 discharges to the load device (e.g., load device 230), the battery voltage of the battery 210 gradually decreases. When the protection integrated chip 310 detects that the battery voltage is lower than a second voltage threshold (i.e., the over-discharge protection point), the protection integrated chip 310 can send a control signal to the first switching element 350 via the over-discharge control output pin 23 to disconnect the first switching element 350 to disconnect the load device from the battery 210. In some embodiments, to prevent the battery 210 from burning out due to excessive current (e.g., when the load device is short-circuited), the protection integrated chip 310 can detect the discharge current of the battery 210 (i.e., the total current from terminal 370 to terminal 380) via the overcurrent detection pin 21. When the discharge current of battery 210 is higher than the third voltage threshold (i.e., the overcurrent protection point), the protection integrated chip 310 can send a control signal to the first switching element 350 through the over-discharge control output pin 23 to disconnect the first switching element 350, so that battery 210 can stop discharging.

[0063] Figure 4 This is a block diagram illustrating an exemplary electronic device with a battery according to some embodiments of this specification. Figure 4 As shown, the electronic device 110 may include a battery 410, a processing circuit 420, and a load device 430. The processing circuit 420 and / or the load device 430 may be electrically connected to the battery 410 via one or more wires. In some embodiments, the battery 410 may be connected to... Figure 2 The battery 210 described herein is similar to or the same as that described herein. Processing circuitry 420 may be similar to or the same as processing circuitry 220, and / or load device 430 may be similar to or the same as load device 230. One or more wires may have resistance similar to that described elsewhere in this specification.

[0064] Battery 410 can be used to supply power to processing circuitry 420 and / or load device 430 via wires. For example, battery 410 can provide a variable current (also known as variable current consumption) to drive load device 430. As another example, battery 410 can provide voltage to processing circuitry 420 to support signal processing by processing circuitry 420. Battery 410 may have a battery voltage and internal resistance. Due to the presence of internal resistance, the output voltage of battery 410 may be lower than the battery voltage of battery 410. That is, internal resistance may cause the output voltage of battery 410 to drop. More descriptions of battery 410 can be found elsewhere in this specification (e.g., Figure 2 (and its description).

[0065] The processing circuit 420 may be a circuit powered by the battery 410. The processing circuit 420 may include a voltage detection unit 422 for detecting the voltage applied to the processing circuit 420. The voltage applied to the processing circuit 420 may depend on the battery voltage of the battery 410. The processing circuit 420 may be used to power off the load device 430 in response to detecting that the voltage applied to the processing circuit 420 is less than a threshold. For example, when the processing circuit 420 determines that the voltage detected by the voltage detection unit 422 is less than a threshold, the processing circuit 420 may initiate a power-off command to power off the load device 430.

[0066] The load device 430 can receive power from the battery 410. In some embodiments, the load device 430 may include electroacoustic components, power components, etc., or combinations thereof. In some embodiments, the load device 430 may be integrated into different electronic devices. For example, the load device 430 may be integrated into headphones, mobile phones, smart glasses, drones, etc. The load device 430 may consume current, which may vary depending on the purpose for which the load device 430 is intended. For example, the load device 430 may be a transducer for headphones, consuming current to convert electrical signals into sound signals based on the content being played. The louder the output sound, the greater the current consumption of the load device 430 may be. As another example, the load device 430 may be a motor that consumes current to drive the device to move at different speeds. The higher the speed, the greater the current consumption of the load device 430 may be.

[0067] In some embodiments, the internal resistance of the battery 410, the resistance originating from the wires, and / or one or more resistances external to the processing circuit 420 may be referred to as the dissipation resistance of the electronic device 110. When the battery 410 supplies dissipated current to the load device 430, the dissipation resistance of the electronic device 110 can share a portion of the battery voltage. Therefore, changes in the dissipated current of the load device 430 may cause changes in the voltage applied to the processing circuit 420. For example, when the dissipated current of the load device 430 increases, the dissipation resistance can share the increased voltage from the battery voltage, resulting in a decrease in the voltage applied to the processing circuit 420. In some embodiments, the voltage decrease in the processing circuit 420 may cause the voltage applied to the processing circuit 420 to fall below a threshold, thereby causing the processing circuit 420 to power off the load device 430. For example, when the capacity percentage of the battery 410 is low (e.g., less than 20%), the battery voltage of the battery 410 may drop to a value less than a maximum value (e.g., 4.2V) (e.g., 3.0V). In this situation, due to the sharp increase in current consumption of the load device 410, the voltage applied to the processing circuit 420 may more easily drop below a threshold value. Therefore, the electronic device 110 can be specifically designed to avoid the voltage applied to the processing circuit 420 suddenly dropping below the threshold due to a sharp increase in current consumption. For example, the electronic device 110 may include, for example, Figure 5 The resistors and capacitors shown are connected in the circuitry of electronic device 110. The resistors and capacitors can cause changes in the voltage applied to processing circuitry 420 to lag behind changes in the current consumed by load device 430. As another example, electronic device 110 may include, for instance... Figure 6 The diodes and capacitors shown are connected in the circuit of electronic device 110. The diodes and capacitors can cause voltage changes on processing circuit 420 to lag behind changes in the current consumed by load device 430.

[0068] It should be noted that the above description is for illustrative purposes only and is not intended to limit the scope of this specification. Various changes and modifications can be made by those skilled in the art based on the teachings of this specification. However, these changes and modifications do not depart from the scope of this specification. For example, a protection circuit can be added to electronic device 110 to protect battery 410 from abnormal conditions (e.g., overcurrent, over-discharge, and / or overcharge of battery 410). When battery 410 provides draining current to load device 430, the protection circuit can share a portion of the battery voltage. As another example, a Bluetooth module can be added to electronic device 110.

[0069] Figure 5 These are schematic diagrams of exemplary circuits of electronic devices according to some embodiments of this specification. Figure 5As shown, circuit 500 may include battery 510, processing circuit 520, load device 530, resistor 540 and capacitor 550.

[0070] Battery 510 can be used to provide variable current (i.e., variable current consumption) to drive load device 530 via one or more wires. Battery 510 may include internal resistance 512. Battery 510 may have a battery voltage that varies with the capacity percentage of battery 510. The higher the capacity percentage of battery 510, the higher the battery voltage of battery 510 can be. Further description of battery 510 can be found in the [link / details]. Figure 2 The battery 210 described herein and its instructions can be found. One or more wires may also have resistance as described elsewhere in this specification.

[0071] The processing circuit 520 may include a voltage detection unit for detecting the voltage applied to the processing circuit 520. The processing circuit 520 may de-energize the load device 530 in response to detecting that the voltage applied to the processing circuit 520 is less than a threshold. In some embodiments, the processing circuit 520 and the load device 530 may be connected in parallel. A first terminal of the resistor 540 may be electrically connected to an input terminal of the processing circuit 520 and one end of the load device 530. A second terminal of the resistor 540 may be electrically connected to a capacitor 550. The voltage detection unit 522 may be electrically connected to the point between the resistor 540 and the capacitor 550.

[0072] During the discharge process of battery 510, when the current consumed by load device 530 remains stable (e.g., at a first current value of 1A), the potential at point 1 can be equal to the potential at point 2. Assuming the resistance between voltage detection unit 522 and ground is sufficiently large, and the current flowing through voltage detection unit 522 is close to zero, the potential at point 3 can also be equal to (or substantially equal to) the potential at points 1 or 2. In this case, the voltage detected by voltage detection unit 522 can be considered as the voltage applied to processing circuit 520.

[0073] When the current consumed by the load device 530 instantaneously increases from a first current value to a second current value (e.g., 2A) higher than the first current value at a first time point, the total voltage distributed across the consumption resistor can increase, for example, from 0.6V to 1.2V, because the circuit 500 includes a consumption resistor (e.g., the internal resistance 512 of the battery 510, and / or the resistance of the wires). Therefore, the potential at point 1 or point 2 can immediately decrease from the first voltage value (e.g., 3.6V) to the second voltage value (e.g., 3V). However, due to the presence of resistor 540 and capacitor 550, the potential at point 3 cannot instantaneously decrease to the second voltage value. At the first time point, capacitor 550 can act as a temporary power source to maintain the potential at point 3 at the second voltage value. Then, capacitor 550 begins to discharge, and the potential at point 3, i.e., the voltage detected by voltage detection unit 522, can decrease according to the following formula (2):

[0074]

[0075] Where V(t) represents the time-varying potential at point 3, V0 represents the difference between the first voltage value and the second voltage value, V′ represents the second voltage value, R represents the resistance of resistor 540, and C represents the capacitance of capacitor 550.

[0076] In other words, the voltage drop detected by the voltage detection unit 522 may lag behind the change in current consumption of the load device 530. For convenience, the lag time can be defined as the time required for the potential at point 3 to drop from the first voltage value corresponding to the first current value to a specific voltage value. The specific voltage value can be any value between the first voltage value and the second voltage value, such as the average of the first voltage value and the second voltage value, or a value close to the second voltage value. The lag time can be related to the product of the resistance of resistor 540 and the capacitance of capacitor 550. For example, the larger the product of the resistance of resistor 540 and the capacitance of capacitor 550, the longer the lag time. In some situations, by setting the resistor and capacitor, the lag time can be set to 800 microseconds, 600 microseconds, 400 microseconds, 200 microseconds, 100 microseconds, 80 microseconds, 50 microseconds, 40 microseconds, 30 microseconds, 20 microseconds, 10 microseconds, 5 microseconds, etc.

[0077] Similarly, when the current consumed by the load device 530 decreases instantaneously from a second current value (i.e., 2A) to a third current value (e.g., 1.5A) below the second current value at a second time point, the total voltage distributed across the consumption resistor can decrease. Therefore, the potential at point 1 or point 2 can immediately increase from the second voltage value to the third voltage value corresponding to the third current value. The increase in voltage detected by the voltage detection unit 522 may also lag behind the change in the current consumed by the load device 530. The capacitor 550 can be charged, and the potential at point 3, i.e., the voltage detected by the voltage detection unit 522, can gradually increase. In this case, at the second time point, the voltage applied to the processing circuit 520 can begin to increase before dropping to a second voltage value that may be below a threshold, thereby preventing the electronic device from shutting down due to a sudden increase in the current consumed by the electronic device.

[0078] It should be noted that the above description is for illustrative purposes only and is not intended to limit the scope of this specification. Various changes and modifications can be made by those skilled in the art based on the teachings of this specification. However, these changes and modifications do not depart from the scope of this specification. For example, circuit 500 may also include one or more additional components, such as... Figure 2 The protection circuit described herein. The resistor may come from one or more additional components. Therefore, when the battery 510 provides current to the load device 530, one or more additional components may share part of the battery voltage, causing a voltage drop applied to the processing circuit 520 when the current consumed by the load device 530 increases sharply.

[0079] Figure 6 These are schematic diagrams of exemplary circuits of electronic devices according to some embodiments of this specification. Figure 6 As shown, circuit 600 may include battery 610, processing circuit 620, load device 630, diode 640 and capacitor 650.

[0080] Battery 610 may include, as elsewhere in this specification (e.g., Figure 2 and Figure 5The internal resistance 612 and battery voltage are described in the description. Processing circuitry 620 may include a voltage detection unit 622 for detecting the voltage applied to processing circuitry 620. Processing circuitry 620 may de-energize load device 630 in response to detecting that the voltage applied to processing circuitry 620 is less than a threshold. Processing circuitry 620 and load device 630 may be connected in parallel. Diode 640 may include a cathode and an anode, allowing current to flow primarily from anode to cathode through diode 640. The anode of diode 640 may be electrically connected to load device 630 and / or battery 610. The cathode of diode 640 may be electrically connected to processing circuitry 620. Therefore, diode 640 may allow current to flow from battery 610 to processing circuitry 620 and may prevent current from flowing from processing circuitry 620 to load device 630. In some embodiments, diode 640 may include a PN junction diode, Schottky diode, light-emitting diode, Zener diode, transient voltage suppressor (TVS) diode, etc., or any combination thereof. Capacitor 650 can be electrically connected to the cathode of diode 640. Processing circuit 620 can be electrically connected to the point between diode 640 and capacitor 650 to detect the voltage applied to processing circuit 620.

[0081] During the discharge of battery 610, when the current consumed by load device 630 remains stable (e.g., at the first current value, 1A), the potential at point 4 can be equal to (or substantially equal to) the potential at point 5 because diode 640 has low resistance (close to zero) in the direction from the anode to the cathode of diode 640.

[0082] When the current consumed by the load device 630 instantaneously increases from a first current value to a second current value (e.g., 2A) higher than the first current value at a first time point, the total voltage distributed across the consumption resistor can increase, for example, from 0.6V to 1.2V, because the circuit 600 includes a consumption resistor (e.g., the internal resistance 612 of the battery 610, and / or the resistance of the wires). Therefore, the potential at point 4 can immediately decrease from the first voltage value (e.g., 3.6V) to the second voltage value (e.g., 3V). However, due to the presence of the diode 640 and the capacitor 650, the potential at point 5 cannot instantly decrease to the second voltage value. At the first time point, the capacitor 650 can act as a temporary power source, maintaining the potential at point 5 at the second voltage value. Then, the capacitor 650 begins to discharge, and the potential at point 5, i.e., the voltage detected by the voltage detection unit 622, gradually decreases. That is, the decrease in voltage detected by the voltage detection unit 622 can lag behind the change in the current consumed by the load device 630. The lag time can be related to the capacitance of the capacitor 650. For example, the larger the capacitance of capacitor 650, the greater the lag time can be.

[0083] Similarly, when the current consumed by the load device 630 decreases instantaneously from a second current value (e.g., 2A) to a third current value (e.g., 1.5A) below the second current value at a second time point, the total voltage distributed across the consumption resistor can decrease. The increase in voltage detected by the voltage detection unit 622 can also lag behind the change in the current consumed by the load device 630. The capacitor 650 can be charged, and the potential at point 5, i.e., the voltage detected by the voltage detection unit 622, can gradually increase. In this case, at the second time point, the voltage applied to the processing circuit 620 can begin to increase before dropping to a second voltage value below a threshold, thereby preventing the electronic device from shutting down due to a sudden increase in its current consumption.

[0084] It should be noted that the above description is for illustrative purposes only and is not intended to limit the scope of this specification. Various changes and modifications can be made by those skilled in the art based on the teachings of this specification. However, these changes and modifications do not depart from the scope of this specification. For example, circuit 600 may also include one or more additional components, such as... Figure 2 The protection circuit described herein. The resistor may come from one or more additional components. Therefore, when the battery 610 supplies current to the load device 630, one or more additional components can share part of the battery voltage, thereby causing the voltage applied to the processing circuit 620 to drop when the current consumption of the load device 630 increases sharply.

[0085] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0086] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0087] Furthermore, those skilled in the art will understand that aspects of this application can be described and illustrated through several patentable types or situations, including any new and useful combination of processes, machines, products, or substances, or any new and useful improvements thereof. Accordingly, aspects of this application can be implemented entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. All of the above hardware or software may be referred to as a “data block,” “module,” “engine,” “unit,” “component,” or “system.” Furthermore, aspects of this application may manifest as a computer product located on one or more computer-readable media, the product including computer-readable program code.

[0088] Computer storage media may contain a propagated data signal containing computer program code, for example, on baseband or as part of a carrier wave. This propagated signal may take various forms, including electromagnetic, optical, and suitable combinations thereof. Computer storage media can be any computer-readable medium other than a computer-readable storage medium, which can be connected to an instruction execution system, apparatus, or device to enable communication, propagation, or transmission of a program for use. The program code located on the computer storage medium can be propagated through any suitable medium, including radio, cable, fiber optic cable, RF, or similar media, or any combination of the above media.

[0089] The computer program code required for the operation of each part of this application can be written in any one or more programming languages, including object-oriented programming languages ​​such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C#, VB.NET, Python, etc.; conventional procedural programming languages ​​such as C, Visual Basic, Fortran2003, Perl, COBOL2002, PHP, ABAP; dynamic programming languages ​​such as Python, Ruby, and Groovy; or other programming languages. This program code can run entirely on the user's computer, or as a standalone software package on the user's computer, or partially on the user's computer and partially on a remote computer, or entirely on a remote computer or processing device. In the latter case, the remote computer can be connected to the user's computer through any network, such as a local area network (LAN) or wide area network (WAN), or connected to an external computer (e.g., via the Internet), or in a cloud computing environment, or used as a service such as Software as a Service (SaaS).

[0090] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this application are not intended to limit the order of the processes and methods of this application. Although the foregoing disclosure has discussed some currently considered useful embodiments of the invention through various examples, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the substance and scope of the embodiments of this application. For example, while the system components described above can be implemented using hardware devices, they can also be implemented solely through software solutions, such as installing the described system on existing servers or mobile devices.

[0091] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0092] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0093] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent are incorporated herein by reference. This excludes historical application documents that are inconsistent with or conflict with the content of this application, as well as documents that limit the broadest scope of the claims in this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail.

[0094] Finally, it should be understood that the embodiments described in this application are merely illustrative of the principles of the embodiments of this application. Other modifications may also fall within the scope of this application. Therefore, alternative configurations of the embodiments of this application are considered as examples and not limitations, and are regarded as consistent with the teachings of this application. Accordingly, the embodiments of this application are not limited to the embodiments explicitly described and illustrated in this application.

Claims

1. A circuit, characterized in that, include: A battery is used to provide current to drive load devices; A protection circuit, electrically connected to the battery, is used to protect the battery from abnormal conditions. as well as The processing circuit, electrically connected to the battery via wires, is used for: Detect the voltage applied to the processing circuit; and The load device is powered off in response to detecting that the voltage applied to the processing circuit is less than a threshold, wherein the voltage applied to the processing circuit depends on the battery voltage of the battery and the voltage drop caused by the current and the resistance from the battery, the protection circuit and the wires; wherein the change in the voltage applied to the processing circuit lags behind the change in the current; The circuit includes a capacitor and a diode, wherein: The anode of the diode is electrically connected to the load device, and the cathode of the diode is electrically connected to the processing circuit. The capacitor is electrically connected to the cathode of the diode; and The processing circuit is electrically connected to the diode and the capacitor to detect the voltage applied to the processing circuit.

2. The circuit according to claim 1, characterized in that, The battery voltage varies with the battery's capacity percentage.

3. The circuit according to claim 1, characterized in that, The resistance from the battery includes a first resistance, which is less than 200mΩ.

4. The circuit according to claim 3, characterized in that, The resistor from the protection circuit includes a second resistor, which is between 10mΩ and 50mΩ.

5. The circuit according to claim 1, characterized in that, The resistance from the wire includes a third resistance, which is less than 0.8 Ω / m.

6. The circuit according to claim 1, characterized in that, The wires are coated with tin or silver.

7. The circuit according to claim 1, characterized in that, The diameter of the wire is between 0.1 mm and 0.5 mm.

8. The circuit according to claim 1, characterized in that, The load device includes electroacoustic components.

9. The circuit according to claim 1, characterized in that, The abnormal situation includes at least one of the following: battery overcharging, battery over-discharging, or battery overcurrent.

10. The circuit according to claim 1, characterized in that, The hysteresis time is related to the capacitance of the capacitor.

11. An electronic device comprising a circuit, characterized in that, The circuit includes: Batteries, used to provide variable current to drive load devices; and The processing circuit, electrically connected to the battery via wires, is used for: Detect the voltage applied to the processing circuit; and In response to detecting that the voltage applied to the processing circuit is less than a threshold, the load device is powered off, wherein the voltage applied to the processing circuit depends on the battery voltage of the battery and the voltage drop caused by the variable current and the resistance from the battery and the wires, wherein the change in the voltage applied to the processing circuit lags behind the change in the variable current; The circuit includes a capacitor and a diode, wherein: The anode of the diode is electrically connected to the load device, and the cathode of the diode is electrically connected to the processing circuit. The capacitor is electrically connected to the cathode of the diode; and The processing circuit is electrically connected to the diode and the capacitor to detect the voltage applied to the processing circuit.

12. The electronic device according to claim 11, characterized in that, The load device includes electroacoustic components.

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