Charging and discharging circuit and electronic device

Abstract

The present disclosure relates to a charging and discharging circuit and an electronic device. The charging and discharging circuit comprises: a battery comprising a first switching unit and a battery cell, a first end of the first switching unit being electrically connected to a negative electrode of the battery cell, a second end of the first switching unit being configured to be electrically connected to a ground terminal, and a positive electrode of the battery cell being configured to be electrically connected to a first load; a power management circuit comprising a second switching unit, a first end of the second switching unit being configured to be electrically connected to a first interface; and a first charge pump circuit, a first end of the first charge pump circuit being electrically connected to the positive electrode of the battery cell, and a second end of the first charge pump circuit being electrically connected to a second end of the second switching unit. In the case that the battery is charged to a full charge amount, by controlling the conduction and disconnection of the first switching unit and the second switching unit, the first load can be supplied with power via the power management circuit and the charging of the battery is stopped, thereby avoiding the problem of recharging caused by the battery supplying power to the first load, and thus improving the reliability of the charging and discharging circuit.

Description

Technical Field

[0001] This disclosure relates to the field of charging and discharging technology, and in particular to a charging and discharging circuit and electronic device. Background Technology

[0002] With the rapid development of technology, charging devices charge batteries through charging and discharging circuits to bring them to full charge. However, even when the battery is fully charged, there is a problem of repeated charging, leading to poor reliability of the charging and discharging circuits. Utility Model Content

[0003] To overcome the problems existing in related technologies, this disclosure provides a charging and discharging circuit and an electronic device.

[0004] According to a first aspect of this disclosure, a charging and discharging circuit is provided, the charging and discharging circuit comprising:

[0005] The battery includes a first switching unit and a battery cell. A first terminal of the first switching unit is electrically connected to the negative terminal of the battery cell, a second terminal of the first switching unit is electrically connected to a ground terminal, and the positive terminal of the battery cell is electrically connected to a first load.

[0006] A power management circuit, the power management circuit including a second switching unit, the first end of the second switching unit being used for electrical connection with a first interface;

[0007] A first charge pump circuit, wherein a first terminal of the first charge pump circuit is electrically connected to the positive electrode of the battery cell, and a second terminal of the first charge pump circuit is electrically connected to the second terminal of the second switching unit.

[0008] In this embodiment, when the battery is fully charged, the power management circuit can supply power to the first load and stop charging the battery by controlling the on and off states of the first and second switching units. This avoids the problem of recharging caused by the battery supplying power to the first load, thereby improving the reliability of the charging and discharging circuit.

[0009] In some embodiments of this disclosure, the first switching unit is a charging transistor of the battery, and the second switching unit is a charging transistor of the power management circuit.

[0010] In some embodiments of this disclosure, the number of battery cells is one; or, the number of battery cells is multiple, and the multiple battery cells are connected in series.

[0011] Wherein, the voltage ratio between the second terminal and the first terminal of the first charge pump circuit is 1:N, where N is the number of battery cells.

[0012] In some embodiments of this disclosure, the first load includes at least one of a display module, an audio module, and a communication module.

[0013] In some embodiments of this disclosure, the first terminal of the second switching unit serves as the first terminal of the power management circuit and is electrically connected to the first interface; the second terminal of the second switching unit serves as the second terminal of the power management circuit and is electrically connected to the second terminal of the first charge pump circuit; and the third terminal of the power management circuit is electrically connected to the second load.

[0014] In some embodiments of this disclosure, when the battery is fully charged, the first switching unit is turned off and the second switching unit is turned on.

[0015] In some embodiments of this disclosure, the charging and discharging circuit further includes:

[0016] A third switching unit is electrically connected between the first interface and the first end of the second switching unit;

[0017] A first overvoltage protection circuit is electrically connected between the third switching unit and the first terminal of the second switching unit.

[0018] In some embodiments of this disclosure, the charging and discharging circuit further includes:

[0019] The second charge pump circuit has a first terminal for electrical connection to the first interface and a second terminal for electrical connection to the positive electrode of the battery cell. The second charge pump circuit is used to charge the battery by converting the voltage of the charging device electrically connected to the first interface.

[0020] In some embodiments of this disclosure, the charging and discharging circuit further includes:

[0021] The second overvoltage protection circuit has a first terminal electrically connected to the third terminal of the power management circuit, and a second terminal electrically connected to the second interface.

[0022] In some embodiments of this disclosure, the charging and discharging circuit further includes:

[0023] A voltage conversion circuit is provided, wherein a first terminal of the voltage conversion circuit is electrically connected to the positive terminal of the battery cell, a second terminal of the voltage conversion circuit is electrically connected to the first interface, and the voltage conversion circuit is used to convert the voltage of the battery to supply power to a third load electrically connected to the first interface.

[0024] In some embodiments of this disclosure, the charging and discharging circuit further includes:

[0025] The third overvoltage protection circuit is electrically connected between the second terminal of the voltage conversion circuit and the first interface.

[0026] According to a second aspect of this disclosure, an electronic device is provided, the electronic device including the charging and discharging circuit described above.

[0027] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0028] The charging and discharging circuit includes a battery, a power management circuit, and a first charge pump circuit. The battery includes a first switching unit and battery cells, and the power management circuit includes a second switching unit. The interface, power management circuit, first charge pump circuit, and battery are sequentially electrically connected to form a charging path to charge the battery and simultaneously supply power to a first load electrically connected to the battery. When the battery is fully charged, by controlling the on and off states of the first and second switching units, power can be supplied to the first load via the power management circuit while stopping battery charging. This avoids the problem of recharging caused by the battery supplying power to the first load, thereby improving the reliability of the charging and discharging circuit.

[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0031] Figure 1 This is a schematic diagram of the structure of a charging and discharging circuit provided in an exemplary embodiment of this disclosure;

[0032] Figure 2 This is a schematic diagram of a power supply path provided in an exemplary embodiment of this disclosure;

[0033] Figure 3 This is a schematic diagram of a power supply path provided in another exemplary embodiment of this disclosure;

[0034] Figure 4 This is a schematic diagram of the structure of a charging and discharging circuit provided in another exemplary embodiment of this disclosure;

[0035] Figure 5 This is a schematic diagram of a power supply path provided in another exemplary embodiment of this disclosure;

[0036] Figure 6 This is a schematic diagram of a power supply path provided in another exemplary embodiment of this disclosure;

[0037] Figure 7This is a system block diagram of an electronic device provided in an exemplary embodiment of the present disclosure.

[0038] In the picture:

[0039] 10-Battery; 11-First switching unit; 12-Battery cell; 20-Power management circuit; 21-Second switching unit; 30-First charge pump circuit; 40-First load; 50-First interface; 60-Second load; 70-Third switching unit; 80-First overvoltage protection circuit; 90-Second charge pump circuit; 100-Second overvoltage protection circuit; 110-Second interface; 120-Voltage conversion circuit; 130-Third overvoltage protection circuit; 400-Electronic device; 402-Processing component; 404-Memory; 406-Power supply component; 408-Multimedia component; 410-Audio component; 412-Input / output interface; 414-Sensor component; 416-Communication component; 420-Processor; GND-Ground terminal. Detailed Implementation

[0040] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this invention as detailed in the appended claims. It should also be understood that the term “and / or” as used herein refers to any or all possible combinations including one or more of the associated listed items.

[0041] With the rapid development of technology, charging devices charge batteries through charging and discharging circuits, bringing the batteries to full charge. These devices can charge batteries at different rates, which not only increases the charging speed but also extends the battery's lifespan.

[0042] An exemplary embodiment of this disclosure provides a charging and discharging circuit, which includes a battery and a power management circuit. The battery is electrically connected to a first load, and the power management circuit is electrically connected to the battery and a second load. When a charging device charges the battery through the charging and discharging circuit, the charging device can also supply power to the first and second loads during the charging process, without requiring the battery to supply power to increase the battery's charging rate. However, when the battery is fully charged, the charging device stops charging the battery, but can still supply power to the second load through the power management circuit. When the first load is running, the battery needs to supply power to the first load. This causes the battery's charge to gradually decrease when it reaches full charge and the charging device is electrically connected to the power management circuit. When the battery's charge decreases to a certain level, the charging device needs to recharge the battery, resulting in the problem of repeated charging of the battery.

[0043] An exemplary embodiment of this disclosure also provides a charging and discharging circuit, such as Figure 1 As shown, the charging and discharging circuit includes a battery 10, a power management circuit 20, and a first charge pump circuit 30. The battery 10 includes a first switching unit 11 and a cell 12. A first terminal of the first switching unit 11 is electrically connected to the negative terminal of the cell 12, and a second terminal of the first switching unit 11 is electrically connected to the ground terminal GND. The positive terminal of the cell 12 is electrically connected to a first load 40. The power management circuit 20 includes a second switching unit 21, and a first terminal of the second switching unit 21 is electrically connected to a first interface 50. The first terminal of the first charge pump circuit 30 is electrically connected to the positive terminal of the cell 12, and a second terminal of the first charge pump circuit 30 is electrically connected to the second terminal of the second switching unit 21.

[0044] In this embodiment, the charging and discharging circuit includes a battery, a power management circuit, and a first charge pump circuit. The battery includes a first switching unit and a battery cell, and the power management circuit includes a second switching unit. The interface, power management circuit, first charge pump circuit, and battery are sequentially electrically connected to form a charging path to charge the battery and simultaneously supply power to a first load electrically connected to the battery. When the battery is fully charged, by controlling the on and off states of the first and second switching units, power can be supplied to the first load via the power management circuit while stopping battery charging. This avoids the problem of recharging caused by the battery supplying power to the first load, thereby improving the reliability of the charging and discharging circuit.

[0045] For example, the power management circuit 20 may include a power management integrated circuit (PMIC). The power management circuit 20 and the first charge pump circuit 30 are used for charging and discharging the battery 10, as well as supplying power to the first load 40.

[0046] For example, the first end of the first load 40 is electrically connected to the first end of the first charge pump circuit 30 and the positive terminal of the battery cell 12, and the second end of the first load 40 is electrically connected to the ground terminal GND.

[0047] For example, the first interface 50 is used for electrical connection with a charging device, through which the charging device charges the battery 10.

[0048] In one embodiment, the first switching unit 11 is a charging transistor of the battery 10, and the second switching unit 21 is a charging transistor of the power management circuit 20.

[0049] In this embodiment, the battery's charging transistor and the power management circuit's charging transistor are used to turn the electrical connection between the battery cell and the charging device on or off, so that the charging device can charge or stop charging the battery. By using the battery's charging transistor and the power management circuit's charging transistor as the first switching unit and the second switching unit, the problem of recharging caused by the battery supplying power to the first load is avoided, thereby improving the reliability of the charging and discharging circuit.

[0050] For example, the first switching unit 11 includes a transistor and a diode connected in parallel, and the diode can be the body diode of the transistor. The anode of the diode is electrically connected to the negative terminal of the cell 12, and the cathode of the diode is electrically connected to the ground terminal GND.

[0051] In one embodiment, the number of battery cells 12 is one. The voltage ratio between the second terminal and the first terminal of the first charge pump circuit 30 is 1:1.

[0052] In this embodiment, when the single-cell battery is fully charged, by controlling the on and off states of the first and second switching units, the problem of repeated charging of the single-cell battery caused by the single-cell battery supplying power to the first load can be avoided, thereby improving the reliability of the charging and discharging circuit.

[0053] In one embodiment, there are multiple battery cells 12 connected in series. The voltage ratio between the second and first terminals of the first charge pump circuit 30 is 1:N, where N is the number of battery cells 12. N is greater than 1.

[0054] In this embodiment, when the multi-cell battery is fully charged, by controlling the on and off states of the first and second switching units, the problem of repeated charging of the multi-cell battery caused by the multi-cell battery supplying power to the first load can be avoided, thereby improving the reliability of the charging and discharging circuit.

[0055] In one embodiment, the first load 40 includes at least one of a display module, an audio module, and a communication module.

[0056] In this embodiment, when the battery is fully charged, at least one of the display module, audio module, and communication module may be in operation. If power is supplied to the first load via the battery, the battery charge will gradually decrease, leading to a recharging issue. By controlling the on and off states of the first and second switching units, the power management circuit replaces the battery in supplying power to the first load, ensuring the battery charge remains at full charge and improving the reliability of the charging and discharging circuit.

[0057] In one embodiment, the first end of the second switching unit 21 serves as the first end of the power management circuit 20 and is electrically connected to the first interface 50, the second end of the second switching unit 21 serves as the second end of the power management circuit 20 and is electrically connected to the second end of the first charge pump circuit 30, and the third end of the power management circuit 20 is electrically connected to the second load 60.

[0058] In this embodiment, when the second switching unit is turned on, the charging device can supply power to the first load and the battery through the first interface, the second switching unit, and the first charge pump circuit, charging the battery and enabling the first load to operate. Since the second load is not directly electrically connected to the battery but is electrically connected to the third terminal of the power management circuit, the charging device can supply power to the second load through the first interface and the power management circuit. Because the battery does not need to supply power to the second load, the battery's charge level can be maintained at full charge, thereby improving the reliability of the charging and discharging circuit.

[0059] In one embodiment, when the battery 10 is fully charged, the first switch unit 11 is turned off and the second switch unit 21 is turned on.

[0060] In this embodiment, when the battery is fully charged, the first switch unit is disconnected to prevent the charging device from continuously charging the battery and causing safety hazards, and also to prevent the battery from supplying power to the first load. The second switch unit is turned on, allowing the charging device to supply power to the first load through the power management circuit and the first charge pump circuit, ensuring the normal operation of the first load. By disconnecting the first switch unit and turning on the second switch unit, the charging device can replace the battery in supplying power to the first load, avoiding the problem of repeated battery charging and thus improving the reliability of the charging and discharging circuit.

[0061] For example, such as Figure 2 As shown, in the first operating state of the charging and discharging circuit, the first switching unit 11 is open and the second switching unit 21 is closed. In the second operating state of the charging and discharging circuit, the first switching unit 11 is closed and the second switching unit 21 is open. The first operating state can be that the first load 40 is in a running state, and the second operating state can be that the first load 40 is in a stopped running state.

[0062] For example, the charging and discharging circuit is equipped with an automatic control state. When the battery 10 is fully charged and the first load 40 is in operation, the charging and discharging circuit enters the automatic control state. If the power of the first load 40 is greater than the power output of the first charge pump circuit 30, the battery 10 will supply power to the first load 40 through the body diode of the first switching unit 11. Figure 3 As shown, both the charging device and the battery 10 supply power to the first load 40. When the battery 10 supplies power to the first load 40 for a long time, the body diode remains in a reverse breakdown state for an extended period, resulting in higher impedance and reduced power supply efficiency. Therefore, upon entering the automatic control state, the current of the first switching unit 11 is detected. When the current of the first switching unit 11 exceeds a preset value, the first switching unit 11 is turned on to supply power to the first load 40 from the battery 10. When the current of the first switching unit 11 is less than the preset value, the current output by the battery 10 to the first load 40 is smaller or non-existent, and the first switching unit 11 remains off. The current of the first switching unit 11 can be detected at preset intervals to reduce the power consumption of the electronic device. For example, the interval can be 30 seconds, 1 minute, 5 minutes, 10 minutes, etc.

[0063] For example, when the battery 10 is fully charged and the first load 40 is in operation, the first switch unit 11 is disconnected and the second switch unit 21 is turned on, and the charging device supplies power to the first load 40 through the power management circuit 20 and the first charge pump circuit 30. At this time, the charging and discharging circuit enters the automatic control state. When the first load 40 switches from the operating state to the stopped operating state, the second switch unit 21 is first controlled to disconnect, and then the first switch unit 11 is controlled to turn on, so as to prevent the charging device from charging the battery 10 through the power management circuit 20 and causing the battery 10 to recharge. Then the charging and discharging circuit exits the automatic control state.

[0064] For example, when the battery 10 is fully charged and the first load 40 is in a stopped state, the first switch unit 11 is turned on and the second switch unit 21 is turned off. At this time, the charging and discharging circuit exits the automatic control state. When the first load 40 switches from the stopped state to the running state, the second switch unit 21 is turned on first, and then the first switch unit 11 is turned off. The charging device supplies power to the first load 40 through the power management circuit 20 and the first charge pump circuit 30 to prevent the battery 10 from being recharged, thus entering the automatic control state.

[0065] In one embodiment, such as Figure 4As shown, the charging and discharging circuit also includes a third switching unit 70 and a first overvoltage protection circuit 80. The third switching unit 70 is electrically connected between the first interface 50 and the first end of the second switching unit 21, and the first overvoltage protection circuit 80 is electrically connected between the third switching unit 70 and the first end of the second switching unit 21.

[0066] In this embodiment, by providing a third switching unit, it is possible to control whether the charging device supplies power to the battery and the load, thereby improving the reliability of the charging and discharging circuit. Furthermore, when the input voltage to the charging device is too high, the first overvoltage protection circuit can provide protection, preventing damage to the charging and discharging circuit due to excessive voltage, thus further improving the reliability of the charging and discharging circuit.

[0067] For example, the first end of the third switching unit 70 is electrically connected to the first interface 50, and the second end of the third switching unit 70 is electrically connected to the first end of the first overvoltage protection circuit 80. The second end of the first overvoltage protection circuit 80 is electrically connected to the first end of the second switching unit 21.

[0068] In one embodiment, the charging and discharging circuit further includes a second charge pump circuit 90. A first terminal of the second charge pump circuit 90 is electrically connected to the first interface 50, and a second terminal of the second charge pump circuit 90 is electrically connected to the positive terminal of the battery cell 12. The second charge pump circuit 90 is used to charge the battery 10 by converting the voltage of the charging device electrically connected to the first interface 50.

[0069] In this embodiment, the charging device charges the battery at a relatively slow rate when using the power management circuit and the first charge pump circuit. The charging device charges the battery at a faster rate when using the second charge pump circuit. By charging the battery at different rates at different charging stages, not only can the charging speed of the battery be improved, but the battery's lifespan can also be extended, thereby improving the reliability of the charging and discharging circuit.

[0070] For example, the first terminal of the second charge pump circuit 90 is electrically connected to the second terminal of the third switching unit 70 and the first terminal of the first overvoltage protection circuit 80. The voltage ratio between the first terminal and the second terminal of the second charge pump circuit 90 is 1:N.

[0071] In one embodiment, the charging and discharging circuit further includes a second overvoltage protection circuit 100. A first terminal of the second overvoltage protection circuit 100 is electrically connected to a third terminal of the power management circuit 20, and a second terminal of the second overvoltage protection circuit 100 is used to be electrically connected to a second interface 110.

[0072] In this embodiment, by setting a second overvoltage protection circuit, when the voltage output by the power management circuit is too high, the second overvoltage protection circuit can protect against damage to the external device electrically connected to the second interface caused by excessive voltage. Furthermore, the power management circuit can supply power to the external device through the second overvoltage protection circuit and the second interface to drive the external device, thereby improving the reliability of the charging and discharging circuit.

[0073] For example, the first interface 50 and the second interface 110 can be different types of interfaces. The first interface 50 can be, for example, a Type-C interface, and the second interface 110 can be, for example, a Spring Pin interface.

[0074] In one embodiment, the charging and discharging circuit further includes a voltage conversion circuit 120. The first terminal of the voltage conversion circuit 120 is electrically connected to the positive terminal of the battery cell 12, and the second terminal of the voltage conversion circuit 120 is used to be electrically connected to the first interface 50. The voltage conversion circuit 120 is used to convert the voltage of the battery 10 and supply power to the third load electrically connected to the first interface 50.

[0075] In this embodiment, when an external device is electrically connected to the first interface, the voltage conversion circuit can convert the battery voltage into a suitable supply voltage to drive the third load (external device). Since the battery can supply power not only to the load inside the electronic device but also to the external device, the reliability of the charging and discharging circuit is improved.

[0076] For example, the voltage conversion circuit 120 may include a boost circuit, a buck circuit, or a buck-boost circuit, etc.

[0077] In one embodiment, the charging and discharging circuit further includes a third overvoltage protection circuit 130. The third overvoltage protection circuit 130 is electrically connected between the second terminal of the voltage conversion circuit 120 and the first interface 50.

[0078] In this embodiment, by setting a third overvoltage protection circuit, when the voltage output by the voltage conversion circuit is too high, the third overvoltage protection circuit can protect against damage to external devices electrically connected to the first interface caused by excessive voltage, thereby improving the reliability of the charging and discharging circuit.

[0079] An exemplary embodiment of this disclosure provides a charging and discharging circuit, such as Figure 4As shown, the charging and discharging circuit includes a battery 10, a power management circuit 20, a first charge pump circuit 30, a third switching unit 70, a first overvoltage protection circuit 80, a second charge pump circuit 90, a second overvoltage protection circuit 100, a voltage conversion circuit 120, and a third overvoltage protection circuit 130. The battery 10 includes a first switching unit 11 and two battery cells 12. The power management circuit 20 includes a second switching unit 21. The two battery cells 12 are connected in series. The first terminal of the first switching unit 11 is electrically connected to the negative terminal of one battery cell 12, and the second terminal of the first switching unit 11 is electrically connected to the ground terminal GND. The positive terminal of the other battery cell 12 is electrically connected to the first terminal of the first charge pump circuit 30, the second terminal of the second charge pump circuit 90, the first terminal of the voltage conversion circuit 120, and the first load 40. The first terminal of the second switching unit 21 is electrically connected to the second terminal of the first overvoltage protection circuit 80 and the second terminal of the first charge pump circuit 30. The third terminal of the power management circuit 20 is electrically connected to the second load 60 and the first terminal of the second overvoltage protection circuit 100. The first terminal of the first overvoltage protection circuit 80 is electrically connected to the second terminal of the third switching unit 70 and the first terminal of the second charge pump circuit 90. The second terminal of the second overvoltage protection circuit 100 is used to electrically connect to the second interface 110. The first end of the third switching unit 70 is electrically connected to the first interface 50 and the first end of the third overvoltage protection circuit 130, and the second end of the third overvoltage protection circuit 130 is electrically connected to the second end of the voltage conversion circuit 120.

[0080] For example, such as Figure 5 As shown, when the battery 10 is not fully charged, both the first switching unit 11 and the second switching unit 21 are turned on, and the charging device supplies power to the second load 60 and the first load 40 while charging the battery 10. Figure 6 As shown, when the battery 10 is fully charged and the first load 40 is in operation, the first switch unit 11 is open and the second switch unit 21 is closed, and the charging device supplies power to the first load 40 and the second load 60, and the charging and discharging circuit enters the automatic control state. When the first load 40 is in the stopped operation state, the first switch unit 11 is closed and the second switch unit 21 is open, and the charging and discharging circuit exits the automatic control state.

[0081] In one exemplary embodiment, an electronic device is provided, which includes the charging and discharging circuit described above. The electronic device includes, for example, a mobile phone, a laptop computer, a tablet computer, and a wearable device.

[0082] refer to Figure 7As shown, the electronic device 400 may include one or more of the following components: a processing component 402, a memory 404, a power supply component 406, a multimedia component 408, an audio component 410, an input / output (I / O) interface 412, a sensor component 414, and a communication component 416.

[0083] Processing component 402 typically controls the overall operation of electronic device 400, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 402 may include one or more processors 420 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 402 may include one or more modules to facilitate interaction between processing component 402 and other components. For example, processing component 402 may include a multimedia module to facilitate interaction between multimedia component 408 and processing component 402.

[0084] Memory 404 is configured to store various types of data to support the operation of electronic device 400. Examples of this data include instructions for any application or method operating on electronic device 400, contact data, phonebook data, messages, pictures, videos, etc. Memory 404 can be implemented by any type of volatile or non-volatile storage terminal or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0085] Power supply component 406 provides power to various components of electronic device 400. Power supply component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 400.

[0086] Multimedia component 408 includes a screen that provides an output interface between electronic device 400 and user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of touch or swipe actions but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 408 includes a front-facing camera module and / or a rear-facing camera module. When electronic device 400 is in an operating mode, such as shooting mode or video mode, the front-facing camera module and / or rear-facing camera module may receive external multimedia data. Each front-facing camera module and rear-facing camera module may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0087] Audio component 410 is configured to output and / or input audio signals. For example, audio component 410 includes a microphone (MIC) configured to receive external audio signals when electronic device 400 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 404 or transmitted via communication component 416. In some embodiments, audio component 410 also includes a speaker for outputting audio signals.

[0088] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0089] Sensor assembly 414 includes one or more sensors for providing state assessments of various aspects of electronic device 400. For example, sensor assembly 414 may detect the on / off state of electronic device 400, the relative positioning of components such as the display and keypad of electronic device 400, changes in position of electronic device 400 or a component of electronic device 400, the presence or absence of user contact with electronic device 400, orientation or acceleration / deceleration of electronic device 400, and temperature changes of electronic device 400. Sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 414 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0090] Communication component 416 is configured to facilitate wired or wireless communication between electronic device 400 and other terminals. Electronic device 400 can access wireless networks based on communication standards, such as WiFi, 2G, 3G, 4G, 5G, or combinations thereof. In one exemplary embodiment, communication component 416 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 416 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0091] In an exemplary embodiment, the electronic device 400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing terminals (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0093] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0094] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0095] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A charging and discharging circuit, characterized in that, The charging and discharging circuit includes: The battery includes a first switching unit and a battery cell. A first terminal of the first switching unit is electrically connected to the negative terminal of the battery cell, a second terminal of the first switching unit is electrically connected to a ground terminal, and the positive terminal of the battery cell is electrically connected to a first load. A power management circuit, the power management circuit including a second switching unit, the first end of the second switching unit being used for electrical connection with a first interface; A first charge pump circuit, wherein a first terminal of the first charge pump circuit is electrically connected to the positive electrode of the battery cell, and a second terminal of the first charge pump circuit is electrically connected to the second terminal of the second switching unit.

2. The charging and discharging circuit according to claim 1, characterized in that, The first switching unit is the charging transistor of the battery, and the second switching unit is the charging transistor of the power management circuit.

3. The charging and discharging circuit according to claim 1, characterized in that, The number of the battery cell is one; or, the number of the battery cells is multiple, and the multiple battery cells are connected in series. Wherein, the voltage ratio between the second terminal and the first terminal of the first charge pump circuit is 1:N, where N is the number of battery cells.

4. The charging and discharging circuit according to claim 1, characterized in that, The first load includes at least one of a display module, an audio module, and a communication module.

5. The charging and discharging circuit according to claim 1, characterized in that, The first terminal of the second switching unit serves as the first terminal of the power management circuit and is electrically connected to the first interface. The second terminal of the second switching unit serves as the second terminal of the power management circuit and is electrically connected to the second terminal of the first charge pump circuit. The third terminal of the power management circuit is electrically connected to the second load.

6. The charging and discharging circuit according to claim 1, characterized in that, When the battery is fully charged, the first switch unit is turned off and the second switch unit is turned on.

7. The charging and discharging circuit according to claim 1, characterized in that, The charging and discharging circuit also includes: A third switching unit is electrically connected between the first interface and the first end of the second switching unit; A first overvoltage protection circuit is electrically connected between the third switching unit and the first terminal of the second switching unit.

8. The charging and discharging circuit according to claim 1, characterized in that, The charging and discharging circuit also includes: The second charge pump circuit has a first terminal for electrical connection to the first interface and a second terminal for electrical connection to the positive electrode of the battery cell. The second charge pump circuit is used to charge the battery by converting the voltage of the charging device electrically connected to the first interface.

9. The charging and discharging circuit according to claim 1, characterized in that, The charging and discharging circuit also includes: The second overvoltage protection circuit has a first terminal electrically connected to the third terminal of the power management circuit, and a second terminal electrically connected to the second interface.

10. The charging and discharging circuit according to any one of claims 1 to 9, characterized in that, The charging and discharging circuit also includes: A voltage conversion circuit is provided, wherein a first terminal of the voltage conversion circuit is electrically connected to the positive terminal of the battery cell, a second terminal of the voltage conversion circuit is electrically connected to the first interface, and the voltage conversion circuit is used to convert the voltage of the battery to supply power to a third load electrically connected to the first interface.

11. The charging and discharging circuit according to claim 10, characterized in that, The charging and discharging circuit also includes: The third overvoltage protection circuit is electrically connected between the second terminal of the voltage conversion circuit and the first interface.

12. An electronic device, characterized in that, The electronic device includes a charging and discharging circuit as described in any one of claims 1 to 11.

Images