Battery reset circuit and equipment

Abstract

The invention provides a battery reset circuit and equipment. The battery reset circuit comprises a switching circuit module, a first diode and a reset key module, the first end of the first diode is connected with the switching circuit module and the reset key module, the second end of the first diode is connected with the battery, and the first diode is used for transmitting the voltage of the battery to the switching circuit module; the switching circuit module is used for switching on a power supply path in the switching circuit module to supply power to a load after receiving the voltage; and the reset key module is used for responding to closing operation of a user, so that the battery is grounded through the diode module to disconnect the power supply path. In the technical scheme, when the switching circuit module cannot receive the current of the battery passing through the diode module, the access for supplying power to the load is cut off, so that the quick reset of the system is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic circuit, and particularly relates to a battery reset circuit and equipment. BACKGROUND

[0002] Small electronic equipment and wearable equipment with built-in lithium battery have high integration, and are generally designed as lithium battery that cannot be disassembled. When the equipment runs for a long time or a program has a problem, the central processor may be dead, so that the system of the entire equipment enters an abnormal state such as a dead machine. At this time, power-off is the most reliable reset mode.

[0003] However, in the above equipment, the lithium battery is difficult to disassemble or cannot be disassembled. Once the system is dead and abnormal, the key is out of order, and the battery cannot be disassembled to quickly power off the system.

[0004] Therefore, how to design a simple and convenient battery reset scheme becomes a technical problem to be solved. SUMMARY

[0005] The present application provides a battery reset circuit and equipment to solve the problem that the prior art cannot simply and reliably reset the battery of the equipment.

[0006] In a first aspect, an embodiment of the present application provides a battery reset circuit, comprising: a switch circuit module, a first diode, and a reset button module, comprising:

[0007] A first end of the first diode is connected with the switch circuit module and the reset button module respectively, a second end of the first diode is connected with a battery, and the first diode is used to transmit the voltage of the battery to the switch circuit module;

[0008] The switch circuit module is used to turn on a power supply path in the switch circuit module to supply power to a load after receiving the voltage.

[0009] The reset button module is used to make the battery grounded through the diode module to disconnect the power supply path in response to a closing operation of a user.

[0010] In one or more embodiments, the circuit further comprises a second diode.

[0011] A first end of the second diode is connected with the switch circuit module and the reset button module respectively, and a second end of the second diode is connected with a charging interface.

[0012] The switch circuit module is used to turn on a power supply path in the switch circuit module after receiving the power supply of the charging interface and / or the voltage in the battery.

[0013] The reset button module is used to respond to the user's closing operation, causing the battery to be grounded through the current of the first diode and / or the power supply to be grounded through the second diode, thereby disconnecting the power supply path.

[0014] In one or more embodiments, the switching circuit module includes: an N-channel metal-oxide-semiconductor field-effect transistor and a P-channel metal-oxide-semiconductor field-effect transistor;

[0015] The gate of the N-channel metal-oxide-semiconductor field-effect transistor is connected to the first terminal of the first diode. The source of the N-channel metal-oxide-semiconductor field-effect transistor is grounded. The drain of the N-channel metal-oxide-semiconductor field-effect transistor is connected to the gate of the P-channel metal-oxide-semiconductor field-effect transistor. The source of the P-channel metal-oxide-semiconductor field-effect transistor is connected to the battery. The drain of the P-channel metal-oxide-semiconductor field-effect transistor is used to connect to the charging management unit.

[0016] The N-channel metal-oxide-semiconductor field-effect transistor is used to pull down the gate of the P-channel metal-oxide-semiconductor field-effect transistor after receiving a voltage, so that current flows through the P-channel metal-oxide-semiconductor field-effect transistor to the charging management unit to supply power to the load.

[0017] In one or more embodiments, the switching circuit module further includes: a first resistor;

[0018] The first end of the first resistor is connected to the source of the P-channel metal-oxide-semiconductor field-effect transistor, and the second end of the first resistor is connected to the gate of the P-channel metal-oxide-semiconductor field-effect transistor.

[0019] The N-channel metal-oxide-semiconductor field-effect transistor is used to disconnect the path from the P-channel metal-oxide-semiconductor field-effect transistor to the charging management unit when no voltage is received.

[0020] In one or more embodiments, the charging interface is also connected to the charging management unit;

[0021] The charging interface is used to charge the charging management unit when the battery is in a state of extremely low voltage, so that the charging management unit and the drain side of the P-channel metal-oxide-semiconductor field-effect transistor output voltage to charge the battery.

[0022] In one or more embodiments, the circuit further includes: a second resistor, wherein the first diode is a unidirectional diode;

[0023] The second end of the first diode is the anode, the first end of the first diode is the cathode, and the second resistor is connected between the first end of the first diode and the switching circuit module.

[0024] The second resistor is used to limit the current of the battery.

[0025] In one or more embodiments, the circuit further includes: a third resistor, wherein the second diode is a unidirectional diode;

[0026] The second end of the second diode is the anode, the first end of the second diode is the cathode, and the third resistor is connected between the first end of the second diode and the switching circuit module;

[0027] The third resistor is used to limit the current of the power supply.

[0028] In one or more embodiments, the circuit further includes: a bidirectional breakdown diode and a first capacitor;

[0029] One end of the bidirectional breakdown diode and the first capacitor connected in parallel is grounded, and the other end is connected between the reset button module and the switch circuit module.

[0030] The bidirectional breakdown diode and the first capacitor are used to protect the reset button module in case of over-discharge.

[0031] Secondly, embodiments of this application provide a device including: a battery reset circuit as described in the first aspect and various embodiments.

[0032] In one or more embodiments, the device further includes: a charging management unit and a load;

[0033] The charging management unit is connected to the switching circuit module in the battery reset circuit and is used to supply power to the load and / or charge the battery in the device.

[0034] The load is used to perform specific functions in the device.

[0035] The battery reset circuit and device provided in this application include a switching circuit module, a first diode, and a reset button module. The first terminal of the first diode is connected to both the switching circuit module and the reset button module, and the second terminal of the first diode is connected to the battery. The first diode transmits the battery voltage to the switching circuit module. Upon receiving the voltage, the switching circuit module activates its power supply path to supply power to the load. The reset button module responds to a user's closing operation, grounding the battery through the diode module to disconnect the power supply path. In this solution, the switching circuit module disconnects the power supply path to the load when it no longer receives current from the battery through the diode module, thus achieving rapid system reset. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0037] Figure 1 A schematic diagram of the battery reset circuit provided in the embodiments of this application. Figure One ;

[0038] Figure 2 A layout diagram of a reset button module;

[0039] Figure 3 A schematic diagram of the battery reset circuit provided in the embodiments of this application. Figure Two ;

[0040] Figure 4 A schematic diagram of the battery reset circuit provided in the embodiments of this application. Figure Three ;

[0041] Figure 5 A schematic diagram of the battery reset circuit provided in the embodiments of this application. Figure Four ;

[0042] Figure 6 This is a schematic diagram of a possible implementation of the battery reset circuit provided in an embodiment of this application;

[0043] Figure 7 Schematic diagram of the device provided in the embodiments of this application Figure One ;

[0044] Figure 8 Schematic diagram of the device provided in the embodiments of this application Figure Two .

[0045] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] Before introducing the embodiments of this application, the application background of the embodiments of this application will be explained first:

[0048] Small electronic devices and wearable devices with built-in lithium batteries are highly integrated and are generally designed with non-removable lithium batteries. When the device runs for a long time or there is a problem with the program, it may cause the central processing unit (CPU) to crash, causing the device system to enter an abnormal state such as a system crash. In this case, powering off is the most reliable way to reset. However, in this scenario where the battery is not removable, the user cannot restore the device by quickly powering off the battery.

[0049] In some technologies, certain devices come with built-in rocker switches or normally closed switches. These switches are connected in series with the main power supply circuit to disconnect the power supply.

[0050] In other technologies, in order to enable the lithium battery to be reset after power failure and thus achieve the effect of plugging and unplugging the lithium battery, many lithium batteries now have a built-in integrated circuit (IC) chip for power failure protection. An interface needs to be reserved at the lithium battery terminal or gold finger to connect to the system side, and software control is required.

[0051] The prior art that this application aims to address has the following problems:

[0052] 1. Small handheld or wearable electronic devices with built-in lithium batteries have a high degree of integration. The lithium batteries are often difficult or non-removable. Once the system crashes or malfunctions, the buttons become unresponsive, and it is impossible to remove the battery to quickly cut off power to the system.

[0053] 2. In the case of using a switch connected in series with the main power supply circuit, especially in high current scenarios, the large current results in a larger usable switch size, which increases the size of the device and reduces portability.

[0054] 3. In current mobile devices, when the device is frozen, pressing and holding the power button will trigger the power management integrated circuit (PIMC) to power off and reset the system. However, if the PMIC also enters an abnormal frozen mode at this time, this operation will not be able to complete the power-off recovery of the system.

[0055] 4. In scenarios where a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) is used with logic control circuits or power-off protection IC chips, if the battery is over-discharged and the voltage is too low, the MOSFET may not be able to conduct or the IC may not work properly, resulting in the device being unable to charge.

[0056] In view of the technical problems existing in the prior art, the inventor of this application has the following concept: a reset button and switch circuit can be designed. When connected to a power source or battery, it can be directly grounded when closed, so as to quickly realize power off. When not closed, the power source or battery can be connected to the switch circuit. When the switch circuit receives the current from the power source or battery, it can conduct the path for the battery to supply power to the load, so as to realize normal equipment operation.

[0057] The technical solution of this application will now be described in detail through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0058] It is worth noting that the application areas of the battery reset circuit and device disclosed herein are not limited.

[0059] Figure 1 A schematic diagram of the battery reset circuit provided in the embodiments of this application. Figure One ,like Figure 1 As shown, the battery reset circuit may include: a switching circuit module, a first diode, and a reset button module;

[0060] In this embodiment, the scenario is described using a battery to power the load, and the battery resets after the system crashes.

[0061] The first end of the first diode is connected to the switch circuit module and the reset button module respectively, and the second end of the first diode is connected to the battery.

[0062] Optionally, the first diode is used to transfer the battery voltage to the switching circuit module;

[0063] In this implementation, the two ends of the first diode are connected to the battery and the switching circuit module, respectively. When the battery is discharging, the voltage in the battery flows into the switching circuit module through the first diode.

[0064] In this embodiment, the diode turns on when the voltage is greater than the diode's forward voltage. That is, the diode can be configured based on the actual power supply, battery, other requirements, etc.

[0065] Optionally, the switching circuit module is used to turn on the power supply path in the switching circuit module to supply power to the load after receiving voltage;

[0066] In this implementation, after receiving voltage, the switching circuit module turns on the power supply path in the switching circuit module, so that the battery uses the power supply path to supply power to the load.

[0067] In one possible implementation, as can be seen from the common content in the following implementation, the power supply path can be a path from the battery to the source of the P-channel metal-oxide-semiconductor field-effect transistor, through the drain of the P-channel metal-oxide-semiconductor field-effect transistor, to the charging management unit. After receiving electrical energy, the charging management unit performs power supply operation to the load, as detailed below.

[0068] Optionally, the reset button module is used to respond to the user's closing operation, causing the battery to be grounded through the diode module to disconnect the power supply path.

[0069] In this implementation, one side of the reset button module is grounded. When the reset button module is closed, the voltage of the battery through the first diode is grounded after passing through the closed reset button module, so that the switching circuit module cannot receive voltage, thereby disconnecting the power supply path in the switching circuit module and achieving the purpose of powering off the system.

[0070] In one possible implementation, the reset button module can be a reset button, such as a small button fixed to the device housing.

[0071] Optional, Figure 2 This is a layout diagram of a reset button module, such as... Figure 2 As shown, the reset button module can be a hidden button.

[0072] In one possible implementation, the hidden button is embedded on the side of the device, displaying a small hole. When the user uses an auxiliary tool such as a SIM card ejector tool to click the small hole, the battery is reset.

[0073] The above layout does not affect the appearance of the equipment.

[0074] The battery reset circuit provided in this application includes a switching circuit module, a first diode, and a reset button module. The first terminal of the first diode is connected to both the switching circuit module and the reset button module, and the second terminal of the first diode is connected to the battery. The first diode transmits the battery voltage to the switching circuit module. Upon receiving the voltage, the switching circuit module activates its power supply path to supply power to the load. The reset button module responds to a user's closing operation, grounding the battery through the diode module to disconnect the power supply path. In this solution, the switching circuit module disconnects the power supply path to the load when it no longer receives current from the battery through the diode module, thus achieving rapid system reset.

[0075] Based on the above embodiments, Figure 3 A schematic diagram of the battery reset circuit provided in the embodiments of this application. Figure Two ,like Figure 3 As shown, the battery reset circuit may also include a second diode.

[0076] In this embodiment, the scenario is described using a power supply connected to the device and the battery being reset after the system crashes.

[0077] The first end of the second diode is connected to the switch circuit module and the reset button module respectively, and the second end of the second diode is connected to the charging interface.

[0078] In this implementation, the charging interface is also connected to the unit at the load. One possibility is that the power supply directly powers the load (actually, it is connected to the battery management unit, which is connected to the load).

[0079] The two ends of the second diode are connected to the charging interface and the switching circuit module, respectively. When the power supply and / or the battery discharges, the voltage in the battery flows into the switching circuit module through the first diode and / or the second diode.

[0080] Optionally, the switching circuit module is used to turn on the power supply path in the switching circuit module after receiving power from the charging interface and / or voltage from the battery.

[0081] In this implementation, after receiving power from the charging interface and / or voltage from the battery, the switching circuit module turns on the power supply path in the switching circuit module, so that the battery uses the power supply path to supply power to the load.

[0082] When power is connected, the diode compares the voltage of the power supply with the voltage of the battery, and conducts the network with the higher voltage to the switching circuit module, thereby making the power supply path open.

[0083] Optionally, the reset button module is used to respond to the user's closing operation by grounding the battery through the current of the first diode and / or the power supply through the second diode to disconnect the power supply path.

[0084] In this implementation, one side of the reset button module is grounded. When the reset button module is closed, the voltage of the battery through the first diode is grounded after passing through the closed reset button module, so that the switching circuit module cannot receive voltage, thereby disconnecting the power supply path in the switching circuit module and achieving the purpose of powering off the system.

[0085] The battery reset circuit provided in this application embodiment further includes a second diode. The first end of the second diode is connected to both the switch circuit module and the reset button module, and the second end of the second diode is connected to the charging interface. The switch circuit module is used to turn on the power supply path after receiving power from the charging interface and / or voltage from the battery. The reset button module is used to disconnect the power supply path in response to a user's closing operation, causing the battery to be grounded through the current of the first diode and / or the power supply to be grounded through the second diode. This technical solution also achieves rapid system reset when a charger is connected.

[0086] Based on the above embodiments, Figure 4 A schematic diagram of the battery reset circuit provided in the embodiments of this application. Figure Three ,like Figure 4 As shown, the switching circuit module includes: an N-channel metal-oxide-semiconductor field-effect transistor and a P-channel metal-oxide-semiconductor field-effect transistor;

[0087] In this configuration, the gate of the N-channel metal-oxide-semiconductor field-effect transistor is connected to the first terminal of the first diode, the source of the N-channel metal-oxide-semiconductor field-effect transistor is grounded, the drain of the N-channel metal-oxide-semiconductor field-effect transistor is connected to the gate of the P-channel metal-oxide-semiconductor field-effect transistor, the source of the P-channel metal-oxide-semiconductor field-effect transistor is connected to the battery, and the drain of the P-channel metal-oxide-semiconductor field-effect transistor is used to connect to the charging management unit.

[0088] Optionally, the N-channel metal-oxide-semiconductor field-effect transistor is used to pull down the gate of the P-channel metal-oxide-semiconductor field-effect transistor after receiving a voltage, so that current flows through the P-channel metal-oxide-semiconductor field-effect transistor to the charging management unit to supply power to the load.

[0089] In this implementation, after receiving the voltage from the power supply and / or the battery, the gate of the NMOS transistor is provided with a high level. At this time, the NMOS transistor is in the on state, that is, the drain of the NMOS transistor is grounded, that is, the gate of the PMOS transistor is pulled low, so that the source and drain of the PMOS transistor are connected, thereby realizing the current of the battery to the charging management unit to supply power to the load.

[0090] Furthermore, such as Figure 4 As shown, the switching circuit module also includes: a first resistor;

[0091] Wherein, the first end of the first resistor is connected to the source of the P-channel metal-oxide-semiconductor field-effect transistor, and the second end of the first resistor is connected to the gate of the P-channel metal-oxide-semiconductor field-effect transistor.

[0092] Optionally, the N-channel metal-oxide-semiconductor field-effect transistor is used to disconnect the path from the P-channel metal-oxide-semiconductor field-effect transistor to the charging management unit when no voltage is received.

[0093] In this implementation, when the reset button module is closed, the gate of the NMOS transistor will be pulled low and is in an off state. At this time, the gate of the PMOS transistor will be pulled high by the first pull-up resistor, the PMOS transistor will not conduct, and the battery will be disconnected from the back-end charging management unit, thus not supplying power to the load.

[0094] The battery reset circuit provided in this application embodiment includes a switching circuit module comprising an N-channel metal-oxide-semiconductor field-effect transistor (MOSFET) and a P-channel MOSFET. The gate of the N-channel MOSFET is connected to the first terminal of a first diode. The source of the N-channel MOSFET is grounded. The drain of the N-channel MOSFET is connected to the gate of the P-channel MOSFET. The source of the P-channel MOSFET is connected to the battery. The drain of the P-channel MOSFET is used to connect to a charging management unit. Upon receiving a voltage, the N-channel MOSFET pulls down the gate of the P-channel MOSFET, allowing current to flow through the P-channel MOSFET to the charging management unit to supply power to the load. This technical solution cleverly connects NMOS and PMOS transistors, enabling the connection between the battery and the charging management unit at the two ends of the PMOS transistor when the gate of the NMOS is energized, thereby powering on the device load.

[0095] Based on the above embodiments, Figure 5 A schematic diagram of the battery reset circuit provided in the embodiments of this application.Figure Four ,like Figure 5 As shown, the circuit may also include: a second resistor, and the first diode is a unidirectional diode;

[0096] The second end of the first diode is the anode, the first end of the first diode is the cathode, and the second resistor is connected between the first end of the first diode and the switching circuit module.

[0097] Optionally, the second resistor is used to limit the current of the battery.

[0098] Furthermore, such as Figure 5 As shown, the circuit may also include: a third resistor and a second diode that is a unidirectional diode;

[0099] The second end of the second diode is the anode, the first end of the second diode is the cathode, and the third resistor is connected between the first end of the second diode and the switching circuit module.

[0100] Optionally, a third resistor is used to limit the current of the power supply.

[0101] In addition, a unidirectional diode can ensure that current flows in only one direction, preventing the current from flowing in the reverse direction in the switching circuit module.

[0102] The first diode and the second diode can be electrostatic discharge (ESD) diodes.

[0103] Furthermore, such as Figure 5 As shown, the circuit also includes: a bidirectional breakdown diode and a first capacitor;

[0104] Among them, one end of the bidirectional breakdown diode and the first capacitor connected in parallel is grounded, and the other end is connected between the reset button module and the switch circuit module.

[0105] Optionally, a bidirectional breakdown diode and a first capacitor are used to protect the reset button module in case of over-discharge.

[0106] Under this implementation, the following functions are also possible:

[0107] 1. Filtering and Voltage Regulation: The first capacitor helps filter out high-frequency noise generated during the switching process of the reset button module, maintaining the stability and reliability of the circuit. The bidirectional breakdown diode can conduct when the voltage exceeds the set range, guiding the overvoltage to ground, thus providing protection and stabilizing the voltage;

[0108] 2. Protection of switches and other circuit components: The bidirectional breakdown diode can conduct when the voltage exceeds its breakdown voltage, releasing the overvoltage to ground and effectively protecting the reset button module and other electronic components from damage;

[0109] 3. Reduce electromagnetic interference: Through filtering and voltage stabilization, electromagnetic interference in the circuit can be reduced, and the overall anti-interference capability of the circuit can be improved.

[0110] 4. Improve circuit reliability and stability: Adding a first capacitor and a bidirectional breakdown diode can improve the reliability, stability and anti-interference ability of the circuit, and extend the service life of the entire circuit.

[0111] Furthermore, such as Figure 5 As shown, the charging interface is also connected to the charging management unit;

[0112] Optionally, the charging interface is used to charge the charging management unit when the battery is in a very low voltage state, so that the charging management unit outputs a voltage on the drain side of the P-channel metal-oxide-semiconductor field-effect transistor to charge the battery.

[0113] In this implementation, when the battery is in a dead state (i.e., the voltage is extremely low), the battery voltage is insufficient to keep the NMOS transistor on, causing the PMOS transistor to also be in an open state.

[0114] At this point, the gate of the NMOS transistor can be pulled high by inserting the charger, which in turn pulls the gate of the PMOS transistor low.

[0115] Meanwhile, since the charging voltage network of the charger is directly connected to the VBUS input terminal of the charging management unit (which can be a charging management chip), the gate circuit inside the charging management unit will open and switch to its BATTERY terminal to output voltage. At this time, the drain of the PMOS transistor remains at a high level. According to the characteristics of the MOS transistor body diode, the drain voltage of the PMOS transistor will be transmitted to the source of the NMOS transistor through the body diode. From this point on, the PMOS transistor is turned on, realizing the charging operation of the battery.

[0116] Subsequently, when the battery terminal voltage breaks free from over-discharge protection, and the charger is plugged in, the unidirectional conduction diode will compare the charger voltage with the battery voltage, and conduct the network with the higher voltage to the gate of the NMOS transistor, pulling it high to achieve conduction.

[0117] The battery reset circuit provided in this application embodiment, through the design of the resistor, unidirectional diode, bidirectional breakdown diode and capacitor mentioned above, achieves protection for the components involved in the battery reset circuit.

[0118] Based on the above embodiments, Figure 6 This is a schematic diagram of a possible implementation of the battery reset circuit provided in the embodiments of this application, such as... Figure 6As shown in the diagram, the schematic includes: unidirectional diode 61, unidirectional diode 62, reset button 63, NMOS transistor 64, PMOS transistor 65, resistor 66, bidirectional breakdown diode 67, capacitor 68, and other resistors and capacitors not marked with serial numbers.

[0119] Scenario 1: When the charger is not plugged in, the voltage of the lithium battery pulls the gate of NMOS transistor 64 high and turns it on. Since the gate of PMOS transistor 65 is connected to the drain of NMOS transistor 64, PMOS transistor 65 is also turned on at this time. The lithium battery will flow into the charging management chip through PMOS transistor 65 and then supply power to the back-end load of the device.

[0120] Scenario 2: When the charger is plugged in, unidirectional diodes 61 and 62 will compare the voltage of the charger with the voltage of the lithium battery, and conduct the higher voltage to the gate of NMOS transistor 64, pulling it high and thus turning it on; the subsequent process is the same as in Scenario 1.

[0121] Scenario 3: When reset button 63 is pressed, the gate of NMOS transistor 64 is pulled low and is in an off state. At this time, the gate of PMOS transistor 65 is pulled high by pull-up resistor 66, and PMOS transistor 65 is not conducting. The lithium battery will be disconnected from the charging management chip. After releasing reset button 63, the circuit immediately returns to Scenario 1, completing the operation of manually inserting and removing the lithium battery, thereby achieving lithium battery reset.

[0122] Scenario 4: When the lithium battery is in a dead state (e.g., with extremely low voltage), the voltage of the lithium battery is insufficient to keep the NMOS transistor 64 on and cause the PMOS transistor 65 to be in an open circuit state.

[0123] ① At this time, the gate of NMOS transistor 64 can be pulled high by inserting the charger, which will cause the gate of PMOS transistor 65 to be pulled low.

[0124] ② Simultaneously, since the charger's charging voltage network is directly connected to the VBUS input terminal of the charging management chip, the gate circuit inside the charging management chip will open and switch to its BATTERY terminal to output voltage. At this time, the drain of PMOS transistor 65 remains at a high level. According to the characteristics of the MOS transistor body diode, the drain voltage will be transmitted to the source of NMOS transistor 64 through the body diode. From this point on, PMOS transistor 65 is turned on, realizing the charging operation of the lithium battery. When the lithium battery terminal voltage leaves the over-discharge protection, the entire circuit will return to the implementation shown in Scenario 2.

[0125] The technical principles and effects of this embodiment will not be elaborated here.

[0126] The following are embodiments of the device involved in this application.

[0127] Figure 7Schematic diagram of the device provided in the embodiments of this application Figure One ,like Figure 7 As shown, the device includes: a battery reset circuit involved in any of the above embodiments.

[0128] The implementation principle and technical effect of its battery reset circuit are as described above.

[0129] exist Figure 7 On this basis, Figure 8 Schematic diagram of the device provided in the embodiments of this application Figure Two ,like Figure 8 As shown, the device may also include: a charging management unit and a load;

[0130] Optionally, the charging management unit is connected to the switching circuit module in the battery reset circuit for supplying power to the load and / or charging the battery in the device.

[0131] In one possible implementation, the principle of charging the battery in the device can be as follows: combined with the battery reset circuit mentioned above, when the charger charging voltage network is directly connected to the VBUS input terminal of the charging management unit (e.g., the charging management chip), the gate circuit inside the charging management chip will open and switch to its BATTERY terminal to output voltage. At this time, the drain of the PMOS transistor remains at a high level. According to the characteristics of the MOS transistor body diode, the drain voltage will be transmitted to the source of the PMOS transistor through the body diode. From this point on, the PMOS transistor is turned on, realizing the charging operation of the charger to the battery.

[0132] The principle of supplying power to the load can be as follows: the battery supplies power to the load through the PMOS transistor and the charging management unit.

[0133] Optionally, the load is used to perform specific functions within the device.

[0134] In one possible implementation, the functionality of the payload varies depending on its type. Here are some examples of possible implementations:

[0135] 1. Displays: Including screens such as Liquid Crystal Display (LCD) and Organic Light-Emitting Diode (OLED), used to display information, graphics and video.

[0136] 2. Processor: Includes chips such as the Central Processing Unit (CPU) and the Graphics Processing Unit (GPU), which are used to process data and execute programs.

[0137] 3. Sensors: Various sensors, such as accelerometers, gyroscopes, Global Positioning System (GPS), cameras, optical sensors, etc., are used to acquire environmental data or user input.

[0138] 4. Communication module: including modules such as Wi-Fi, Bluetooth, and cellular network, used for wireless communication and data transmission.

[0139] 5. Audio components: including speakers, microphones, headphone ports, etc., used for audio input and output.

[0140] 6. Memory: including Random Access Memory (RAM), flash memory, etc., used for data storage and access.

[0141] 7. Vibrator: Used to provide tactile feedback.

[0142] 8. Input devices: such as touch screens, physical keyboards, buttons, etc., used for user input.

[0143] 9. Light-emitting diode (LED) lamp: used for status indication or notification.

[0144] Furthermore, the device may also include a battery.

[0145] In this implementation, the battery type can be selected based on the device type and performance:

[0146] 1. Lithium-ion batteries (English: Li-ion): Widely used in various devices, featuring high energy density and long service life.

[0147] 2. Lithium polymer battery (LiPo): Similar to lithium-ion battery, but thinner and lighter, usually used in thin devices.

[0148] 3. Nickel-metal hydride (NiMH) batteries: These are relatively common and have a long cycle life and relatively low cost.

[0149] 4. Nickel-cadmium (NiCd) batteries: Used less frequently, but still used in some devices, they have high durability and low self-discharge rate.

[0150] 5. Zinc-carbon batteries (alkaline batteries): A common type of disposable battery, suitable for low-power devices such as remote controls and flashlights.

[0151] That is, there is no limitation on the types of devices used in the circuit applications involved in the embodiments of this application.

[0152] 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 battery reset circuit, characterized in that, include: Switching circuit module, first diode, reset button module; The first end of the first diode is connected to the switching circuit module and the reset button module respectively, and the second end of the first diode is connected to the battery. The first diode is used to transmit the voltage of the battery to the switching circuit module. The switching circuit module is used to turn on the power supply path in the switching circuit module to supply power to the load after receiving voltage; The reset button module is used to respond to the user's closing operation, causing the battery to be grounded through the diode module, thereby disconnecting the power supply path.

2. The circuit according to claim 1, characterized in that, The circuit also includes: a second diode; The first end of the second diode is connected to the switch circuit module and the reset button module, respectively, and the second end of the second diode is connected to the charging interface; The switching circuit module is used to turn on the power supply path in the switching circuit module after receiving the power from the charging interface and / or the voltage in the battery. The reset button module is used to respond to the user's closing operation, causing the battery to be grounded through the current of the first diode and / or the power supply to be grounded through the second diode, thereby disconnecting the power supply path.

3. The circuit according to claim 1 or 2, characterized in that, The switching circuit module includes: an N-channel metal-oxide-semiconductor field-effect transistor and a P-channel metal-oxide-semiconductor field-effect transistor; The gate of the N-channel metal-oxide-semiconductor field-effect transistor is connected to the first terminal of the first diode. The source of the N-channel metal-oxide-semiconductor field-effect transistor is grounded. The drain of the N-channel metal-oxide-semiconductor field-effect transistor is connected to the gate of the P-channel metal-oxide-semiconductor field-effect transistor. The source of the P-channel metal-oxide-semiconductor field-effect transistor is connected to the battery. The drain of the P-channel metal-oxide-semiconductor field-effect transistor is used to connect to the charging management unit. The N-channel metal-oxide-semiconductor field-effect transistor is used to pull down the gate of the P-channel metal-oxide-semiconductor field-effect transistor after receiving a voltage, so that current flows through the P-channel metal-oxide-semiconductor field-effect transistor to the charging management unit to supply power to the load.

4. The circuit according to claim 3, characterized in that, The switching circuit module further includes: a first resistor; The first end of the first resistor is connected to the source of the P-channel metal-oxide-semiconductor field-effect transistor, and the second end of the first resistor is connected to the gate of the P-channel metal-oxide-semiconductor field-effect transistor. The N-channel metal-oxide-semiconductor field-effect transistor is used to disconnect the path from the P-channel metal-oxide-semiconductor field-effect transistor to the charging management unit when no voltage is received.

5. The circuit according to claim 3, characterized in that, The charging interface is also connected to the charging management unit; The charging interface is used to charge the charging management unit when the battery is in a state of extremely low voltage, so that the charging management unit and the drain side of the P-channel metal-oxide-semiconductor field-effect transistor output voltage to charge the battery.

6. The circuit according to claim 1 or 2, characterized in that, The circuit further includes: a second resistor, wherein the first diode is a unidirectional diode; The second end of the first diode is the anode, the first end of the first diode is the cathode, and the second resistor is connected between the first end of the first diode and the switching circuit module. The second resistor is used to limit the current of the battery.

7. The circuit according to claim 2, characterized in that, The circuit further includes: a third resistor, and the second diode is a unidirectional diode; The second end of the second diode is the anode, the first end of the second diode is the cathode, and the third resistor is connected between the first end of the second diode and the switching circuit module; The third resistor is used to limit the current of the power supply.

8. The circuit according to claim 1 or 2, characterized in that, The circuit also includes: a bidirectional breakdown diode and a first capacitor; One end of the bidirectional breakdown diode and the first capacitor connected in parallel is grounded, and the other end is connected between the reset button module and the switch circuit module. The bidirectional breakdown diode and the first capacitor are used to protect the reset button module in case of over-discharge.

9. A device, characterized in that, include: The battery reset circuit according to any one of claims 1-8.

10. The device according to claim 9, characterized in that, The device also includes: a charging management unit and a load; The charging management unit is connected to the switching circuit module in the battery reset circuit and is used to supply power to the load and / or charge the battery in the device. The load is used to perform specific functions in the device.

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