A battery protection circuit and an atomization device

Abstract

The application relates to the atomization technical field and provides a battery protection circuit and atomization equipment. The battery protection circuit is applied to an electronic device and comprises a voltage monitoring unit, a charging and discharging protection unit, a separate charging control loop and a discharging control loop. The voltage monitoring unit is used for detecting the voltage of a battery in the electronic device. When the battery voltage is higher than an overcharge threshold value or an overdischarge threshold value, an overcharge protection signal or an overdischarge protection signal is output. A charging on-off circuit arranged in the charging control loop is used for cutting off the charging circuit of the battery in the electronic device and making the battery stop charging in response to the overcharge protection signal when the battery is overcharged. A discharging on-off circuit arranged in the discharging control loop is used for cutting off the power supply circuit in the electronic device and making the electronic device stop working in response to the overdischarge protection signal when the battery is overdischarged. The charging and discharging protection of the battery in the electronic device is realized.

Description

Technical Field

[0001] This application relates to the field of atomization equipment technology, specifically to a battery protection circuit and an atomization device. Background Technology

[0002] A vaporizer is an electronic device that generates an aerosol by heating an atomizing medium for users to inhale, aiming to simulate the experience of traditional cigarettes while reducing harmful substances such as tar and carbon monoxide produced during combustion. Its core components include a battery, an atomizer containing the atomizing medium and heating element, and control circuitry. Due to their portability, variety of flavors, and relatively low risk of secondhand smoke, vaporizers are gradually becoming a popular alternative to traditional tobacco.

[0003] Nebulizers rely on batteries for power during operation. However, batteries can swell, leak, overheat, or even explode under abnormal conditions such as overcharging, over-discharging, short circuits, or overcurrent. Therefore, battery protection circuits are necessary. These circuits monitor voltage and current during charging and automatically cut off charging once the battery is fully charged to prevent overcharging that could lead to swelling, rupture, or explosion. During discharging, they monitor battery voltage in real time and automatically cut off the circuit when the voltage drops to a critical value to prevent further discharge. Battery protection ensures that the battery operates within a safe voltage range, extending battery life and directly reducing the risk of fire or personal injury caused by battery malfunctions. It is a key technological design feature for ensuring user safety.

[0004] Currently, there are two common battery protection solutions. One is implemented through a lithium battery protection chip and peripheral circuits including a MOSFET. The lithium battery protection chip monitors the battery's current and voltage to determine whether protection conditions (such as overcharge, over-discharge, overcurrent, and short circuit) are triggered. When an abnormality is detected, a control signal is output to shut down the external MOSFET, cutting off the power supply to the signal processing circuit and the charging circuit of the control circuit. However, some atomizing devices operate at high currents, requiring high-power MOSFETs, which undoubtedly increases product cost and design complexity, and is not conducive to the miniaturization requirements of atomizing devices. The other solution also uses a lithium battery protection chip, but when it detects an abnormality, it outputs a control signal to cut off the signal processing circuit and the charging circuit of the control circuit. This allows for the miniaturization of atomizing devices, but the charging control circuit and the discharging control circuit are not grounded. When the battery outputs a large current, it will cause circuit interference, leading to inaccurate signals collected by the control circuit. Utility Model Content

[0005] This application proposes a battery protection circuit and an atomizing device with the battery protection circuit, which can solve the technical problems of existing battery protection circuits, such as complex structure, high power consumption, and interference from other circuits caused by the incompatibility of the charging control circuit and the discharging control circuit.

[0006] In a first aspect, embodiments of this application provide a battery protection circuit applied to an electronic device, the electronic device including a battery module, a control module, and a power supply circuit connected between the battery module and the control module, the power supply circuit being used to receive the output voltage of the battery module and supply power to the control module; the battery protection circuit includes:

[0007] A voltage monitoring unit has at least one voltage detection terminal, a charging control terminal, and a discharging control terminal; the voltage detection terminal is connected to the positive terminal of the battery module and is used to detect the voltage of the battery module; the charging control terminal is used to output an overcharge protection signal when the detected voltage of the battery module is higher than a first threshold; the discharging control terminal is used to output an over-discharge protection signal when the detected voltage of the battery module is lower than a second threshold.

[0008] The battery module has a separate charging control circuit and a discharging control circuit. The charging control circuit is connected between the battery module and an external power source, and the discharging control circuit is connected between the battery module and the power supply circuit.

[0009] The charge / discharge protection unit includes a charge on / off circuit disposed in the charging control circuit and a discharge on / off circuit disposed in the discharging control circuit. The charge on / off circuit is used to disconnect the connection between the external power supply and the battery module in response to the overcharge protection signal, so that the battery module stops obtaining voltage from the external power supply for charging, thereby realizing overcharge protection of the battery module. The discharge on / off circuit is used to disconnect the connection between the battery module and the power supply circuit in response to the overcharge protection signal, so that the battery module stops supplying power to the control module, thereby realizing over-discharge protection of the battery module.

[0010] In some embodiments, the discharge switching circuit includes a first switching circuit, the control terminal of the first switching circuit is connected to the discharge control terminal, the first terminal of the first switching circuit is connected to the battery module, and the second terminal of the first switching circuit is connected to the power supply circuit.

[0011] In some embodiments, the first switching circuit includes a switching transistor Q1, a switching transistor Q2, a resistor R1, a resistor R2, and a resistor R3;

[0012] The first end of resistor R2 is connected to the control terminal of the first switching circuit; the control terminal of switch Q1 is connected to the second end of resistor R2, and the first end of switch Q1 is grounded; the control terminal of switch Q2 is connected to the second end of switch Q1, the first end of switch Q2 is connected to the first terminal of the first switching circuit, and the second end of switch Q2 is connected to the second terminal of the first switching circuit; the first end of resistor R1 is connected to the first end of switch Q2, and the second end of resistor R1 is connected to the second end of switch Q1; the first end of resistor R3 is connected to the second end of resistor R2, and the second end of resistor R3 is grounded.

[0013] In some embodiments, the first switching circuit further includes a diode D1; the first end of the diode D1 is connected to the first end of the first switching circuit, and the second end of the diode D1 is connected to the first end of the switching transistor Q2.

[0014] In some embodiments, the charging on / off circuit includes a switching transistor Q3, the control terminal of the switching transistor Q3 is connected to the charging control terminal, the first terminal of the switching transistor Q3 is connected to a preset voltage terminal, and the second terminal of the switching transistor Q3 is connected to the negative terminal of the battery module.

[0015] In some embodiments, the voltage monitoring unit is a lithium battery protection chip; the lithium battery protection chip has at least one voltage detection terminal, which is connected to the positive terminal of at least one battery in the battery module through a resistor.

[0016] Secondly, embodiments of this application provide an atomizing device, comprising:

[0017] A battery module, comprising at least one rechargeable battery;

[0018] An atomization module includes an atomization matrix and a heating element for heating the atomization matrix to generate an aerosol;

[0019] A control module, at least for controlling the heating of the heating element and the charging of the battery module;

[0020] A power supply circuit, connected between the battery module and the control module, is used to receive the voltage output by the battery module and supply power to the control module;

[0021] The battery protection circuit includes a voltage monitoring unit, a charge / discharge protection unit, and separate charging control circuits and discharging control circuits.

[0022] The voltage monitoring unit has at least one voltage detection terminal, a charging control terminal, and a discharging control terminal; the voltage detection terminal is connected to the positive terminal of the battery module and is used to detect the voltage of the battery module; the charging control terminal is used to output an overcharge protection signal when the voltage of the battery module is detected to be higher than a first threshold; the discharging control terminal is used to output an over-discharge protection signal when the voltage of the battery module is detected to be lower than a second threshold.

[0023] The charging control circuit is connected between the battery module and an external power source, and the discharging control circuit is connected between the battery module and the power supply circuit.

[0024] The charge / discharge protection unit includes a charge on / off circuit disposed in the charge control circuit and a discharge on / off circuit disposed in the discharge control circuit. The charge on / off circuit, in response to the overcharge protection signal, disconnects the connection between the external power supply and the battery module, so that the battery module stops obtaining voltage from the external power supply for charging. The discharge on / off circuit, in response to the overcharge protection signal, disconnects the connection between the battery module and the power supply circuit, so that the battery module stops supplying power to the control module, thereby realizing over-discharge protection for the battery module.

[0025] In some embodiments, the discharge switching circuit includes a switch Q1, a diode D1, a switch Q2, a resistor R1, a resistor R2, and a resistor R3;

[0026] The first end of resistor R2 is connected to the discharge control terminal; the control terminal of switch Q1 is connected to the second end of resistor R2, and the first end of switch Q1 is grounded; the first end of diode D1 is connected to the battery module; the control terminal of switch Q2 is connected to the second end of switch Q1, the first end of switch Q2 is connected to the second end of diode D1, and the second end of switch Q2 is connected to the power supply circuit; the first end of resistor R1 is connected to the first end of switch Q2, and the second end of resistor R1 is connected to the second end of switch Q1; the first end of resistor R3 is connected to the second end of resistor R2, and the second end of resistor R3 is grounded.

[0027] In some embodiments, the charging on / off circuit includes a switching transistor Q3, the control terminal of the switching transistor Q3 is connected to the charging control terminal, the first terminal of the switching transistor Q3 is connected to a preset voltage terminal, and the second terminal of the switching transistor Q3 is connected to the negative terminal of the battery module.

[0028] In some embodiments, the voltage monitoring unit is a lithium battery protection chip; the lithium battery protection chip has at least one voltage detection terminal, which is connected to the positive terminal of at least one battery in the battery module through a resistor;

[0029] The control module includes a microprocessor; the microprocessor, the power supply circuit, and the battery module share a common ground.

[0030] This application provides a battery protection circuit and an atomizing device. The battery protection circuit, applied in an electronic device, includes a voltage monitoring unit, a charge / discharge protection unit, and separate charging and discharging control circuits. The voltage monitoring unit detects the battery voltage in the electronic device and outputs an overcharge protection signal or an over-discharge protection signal when the battery voltage exceeds an overcharge or over-discharge threshold. A charging on / off circuit in the charging control circuit, responding to the overcharge protection signal when the battery is overcharged, cuts off the charging circuit in the electronic device, stopping charging. Similarly, a discharging on / off circuit in the discharging control circuit, responding to the over-discharge protection signal when the battery is over-discharged, cuts off the power supply circuit in the electronic device, stopping its operation. This application achieves precise decoupling of charge / discharge protection by separately configuring the charging and discharging control circuits, along with independent voltage monitoring and charge / discharge protection units. This eliminates the risk of malfunctions caused by overcharge / over-discharge signal coupling in a shared circuit and reduces electromagnetic interference between charging and discharging circuits. It also facilitates independent optimization of power device selection, reducing system power consumption, circuit design complexity, and cost. Attached Figure Description

[0031] 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.

[0032] Figure 1 This is a schematic diagram of the battery protection structure provided in one embodiment of this application.

[0033] Figure 2 This is a schematic diagram of the structure of a battery protection system provided in another embodiment of this application.

[0034] Figure 3 This is a circuit diagram of a battery protection circuit provided in one embodiment of this example.

[0035] Figure 4 This is a schematic diagram of the structure of an atomizing device provided in one embodiment of this application.

[0036] The accompanying drawings illustrate specific embodiments of this application, 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 concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0037] The present application will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0038] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0039] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship. Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages).

[0040] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0041] Figure 1 This is a schematic diagram of a battery protection circuit provided in one embodiment of this application. Figure 1As shown, the battery protection circuit provided in this embodiment is applied to an electronic device with a battery. The electronic device includes at least a battery module, a control module, and a power supply circuit connected between the battery module and the control module. The power supply circuit is used to receive the output voltage of the battery module and supply power to the control module. Specifically, the battery protection circuit provided in this embodiment includes a voltage monitoring unit 110, a charge / discharge protection unit 120, and separately configured charging control circuit 130 and discharging control circuit 140.

[0042] In this embodiment, the voltage monitoring unit 110 has a voltage detection terminal, a charging control terminal, and a discharging control terminal. There are one or more voltage detection terminals, each connected to the positive terminal of the battery module, used to detect the voltage of the battery module. That is, when the battery module of the electronic device has multiple cells, the multiple voltage detection terminals of the voltage monitoring unit 110 will be connected to the positive terminals of the multiple cells respectively, enabling the monitoring of voltage changes in each cell of the battery module. Compared to monitoring the voltage changes of the entire battery module, this allows for timely detection of overcharge or over-discharge problems in individual cells. The charging control terminal is used to output an overcharge protection signal indicating that overcharge protection is required when the voltage of any cell in the battery module is detected by the voltage detection terminal to be higher than a first threshold, i.e., the upper limit of the battery voltage. Similarly, the discharging control terminal is used to output an over-discharge protection signal indicating that over-discharge protection is required when the voltage of any cell in the battery module is detected by the voltage detection terminal to be lower than a second threshold, i.e., the lower limit of the battery voltage.

[0043] In some embodiments, the voltage monitoring unit 110 may include a lithium battery protection chip with at least one voltage detection terminal, which is connected to one or more cells of the battery module through a sampling resistor. Based on its built-in comparator, it performs threshold judgment on the collected voltage. When the detected voltage is higher than a first threshold, it outputs an overcharge protection signal through the charging control port. When the detected voltage is lower than a second threshold, it outputs an over-discharge protection signal through the discharge control port.

[0044] In this embodiment, the separate charging control circuit 130 and discharging control circuit 140 are used to reduce the multiple problems caused by parameter compromise and architectural limitations due to the shared circuit. For example, the shared circuit needs to continuously monitor the bidirectional charging and discharging current, which will lead to an increase in static power consumption. Common shared MOSFETs need to withstand both large current surges and high conduction losses at the same time. In addition, the shared circuit will also reduce the anti-interference capability of the battery protection circuit.

[0045] In this embodiment, the charging control circuit 130 is connected between the battery module and an external power source, and the discharging control circuit 140 is connected between the battery module and the power supply circuit.

[0046] The charge / discharge protection unit 120 includes a charge on / off circuit in the charge control circuit 130 and a discharge on / off circuit in the discharge control circuit 140. The charge on / off circuit, in response to an overcharge protection signal output by the overcharge control terminal of the voltage monitoring unit 110 when the voltage detection terminal detects that the voltage of at least one battery cell is higher than a first threshold, disconnects the external power supply and the battery module. This prevents the battery module from receiving voltage from the external power supply for charging, thus preventing the external power supply from continuing to charge the battery module and achieving overcharge protection for the battery module.

[0047] The discharge switching circuit is used to respond to the voltage detection terminal of the voltage monitoring unit 110 detecting that the voltage of at least one cell is lower than the second threshold. It disconnects the connection between the battery module and the power supply circuit through the overcharge protection signal output by the charging control terminal, so that the battery module stops supplying power to the control module, that is, cuts off the power supply to the control module of the electronic device, and then cuts off the output of the power circuit (not shown in the figure) of the battery module under the control module, thereby realizing the over-discharge protection of the battery module.

[0048] In summary, the battery protection circuit provided in this embodiment achieves precise decoupling of charge and discharge protection by separately setting up the charging control circuit and the discharging control circuit, and cooperating with independent voltage monitoring units and charge / discharge protection units. Specifically, the voltage monitoring unit can independently set overcharge protection thresholds and over-discharge protection thresholds for charging / discharging conditions, avoiding protection failures caused by parameter compromises in the shared circuit. The discrete architecture ensures that the charging on / off circuit only responds to overcharge signals and the discharging on / off circuit only responds to over-discharge signals, thereby eliminating the risk of malfunction caused by overcharge / over-discharge signal coupling in the shared circuit, and also reducing electromagnetic interference between charging and discharging circuits. In addition, the discrete control circuit is also beneficial for independently optimizing the selection of power devices for the characteristics of low-current long-term charging and high-current instantaneous discharging, reducing system static power consumption and dynamic losses, and improving battery energy efficiency and safety.

[0049] Figure 2 This is a schematic diagram of a battery protection structure provided in another embodiment of this application. Figure 2 As shown, the battery protection circuit provided in this embodiment, based on any of the above embodiments, provides an implementation of the charge / discharge protection unit 120. Specifically, the discharge on / off circuit disposed in the discharge control circuit 140 includes a first switching circuit. The control terminal of the first switching circuit is connected to the discharge control terminal, the first terminal of the first switching circuit is connected to the battery module, and the second terminal of the first switching circuit is connected to the power supply circuit. The first switching circuit turns on or off the connection between its first terminal and the second terminal according to the control signal output by the discharge control terminal, thereby realizing the on / off control between the battery module and the power supply circuit.

[0050] In some embodiments, when the battery module is discharging, if the battery voltage detected by the voltage detection terminal of the voltage monitoring unit 110 is higher than the second threshold, a high-level signal will be output through the discharge control terminal. At this time, the first switching circuit responds to the high-level signal and conducts its first and second terminals, that is, conducts the connection between the battery module and the power supply circuit. Thus, the control module can obtain the power supply voltage from the battery module and control the battery module to supply power to other functional modules in its power circuit, realizing one or more preset functions. Conversely, if the battery voltage detected by the voltage detection terminal of the voltage monitoring unit 110 is lower than the second threshold, a low-level signal will be output through the discharge control terminal, that is, an over-discharge protection signal indicating that the battery has over-discharged and needs to be over-discharged. At this time, the first switching circuit responds to the low-level signal and disconnects its first and second terminals, that is, disconnects the connection between the battery module and the power supply circuit. At this time, the control module will not be able to obtain the power supply voltage from the battery module, that is, the control module's control over the battery module is disconnected. The battery module no longer supplies power to other functional modules in its power circuit, realizing the protection of the battery module from over-discharge, and also causing the electronic device to stop working, so that it no longer consumes the battery power.

[0051] In this embodiment, the charging on / off circuit in the charging control loop 130 includes a second switching circuit. The control terminal of the second switching circuit is connected to the charging control terminal, the first terminal of the second switching circuit is connected to a preset voltage terminal, and the second terminal of the second switching circuit is connected to the negative terminal of the battery module, forming a charging loop for the battery module with the external power supply. The second switching circuit, according to the control signal output by the charging control terminal, turns on or off the connection between its first and second terminals, thereby realizing the on / off control between the external power supply and the battery module.

[0052] In some embodiments, when the battery module is charging, if the battery voltage detected by the voltage detection terminal of the voltage monitoring unit 110 is lower than the first threshold, a high-level signal will be output through the charging control terminal. At this time, the second switching circuit responds to the high-level signal and turns on its first and second terminals, that is, turns on the charging circuit between the battery module and the external power supply, so that the battery module can obtain the supply voltage from the external power supply to charge the battery. Conversely, if the battery voltage detected by the voltage detection terminal of the voltage monitoring unit 110 is higher than the first threshold, a low-level signal will be output through the charging control terminal, that is, an overcharge protection signal indicating that the battery has overcharged and overcharge protection is required. At this time, the second switching circuit responds to the low-level signal and disconnects its first and second terminals, that is, disconnects the connection of the charging circuit between the battery module and the external power supply. At this time, the battery module will not be able to obtain the charging voltage from the external power supply, thereby realizing the overcharge protection of the battery module.

[0053] Figure 3 This is a circuit diagram of a battery protection circuit provided in one embodiment of this invention. Figure 3 As shown, the battery protection circuit provided in this embodiment uses a lithium battery protection chip U1 in the voltage monitoring unit 110. It has two voltage detection terminals (V1 pin and V2 pin) that are connected to the battery module through sampling resistor R5 and resistor R6 respectively. It detects the positive voltage of at least two cells in the power supply module, the charging control terminal (OC pin) and the discharging control terminal (OD pin).

[0054] The first switching circuit of the discharge control loop 140 includes switching transistors Q1 and Q2, resistors R1, R2, and R3. Specifically, the first end of resistor R2 is connected to the control terminal of the first switching circuit, i.e., to the discharge control terminal (OD pin), and is used to obtain the over-discharge protection signal output when the battery voltage is lower than the second threshold. The control terminal of switching transistor Q1 is connected to the second end of resistor R2, and the first end of switching transistor Q1 is grounded. The control terminal of switching transistor Q2 is connected to the second end of switching transistor Q1, and the first end of switching transistor Q2 is connected to the first terminal of the first switching circuit, and the second end of switching transistor Q2 is connected to the second terminal of the first switching circuit. The first end of resistor R1 is connected to the first end of switching transistor Q2, and the second end of resistor R1 is connected to the second end of switching transistor Q1. The first end of resistor R3 is connected to the second end of resistor R2, and the second end of resistor R3 is grounded.

[0055] In some embodiments, the first switching circuit further includes a diode D1, with its first terminal connected to the first terminal of the first switching circuit and its second terminal connected to the first terminal of the switching transistor Q2. For example... Figure 3 As shown, diode D1 is placed between the power supply module and the power supply circuit. Its main purpose is to prevent the power supply circuit from obtaining voltage from the control module and then supplying voltage to the power supply module in reverse, that is, to prevent current reverse flow.

[0056] In this embodiment, the charging on / off circuit of the charging control loop 130 includes a second switching circuit, which includes a switching transistor Q3. The control terminal of the switching transistor Q3 is connected to the charging control terminal, the first terminal of the switching transistor Q3 is connected to the preset voltage terminal, and the second terminal of the switching transistor Q3 is connected to the negative terminal of the battery module, forming a charging loop between the battery module and the external power supply.

[0057] based on Figure 3 The battery protection circuit shown works as follows:

[0058] When the lithium battery protection chip U1 detects that the voltage of the battery cell in the battery module is between the first and second thresholds through the two voltage detection terminals (V1 pin and V2 pin), that is, the battery voltage meets the requirements, the charging control terminal (OC pin) and the discharging control terminal (OD pin) both output high-level signals. The switch Q3 in the charging control circuit 130 responds to the high-level signal and turns on, forming a charging circuit between the external power supply and the battery module, so that the battery module can obtain the input voltage to charge the battery when the external power supply is connected. The switches Q1 and Q2 in the discharging control circuit 140 respond to the high-level signal in turn and turn on, that is, they connect the battery module and the power supply circuit, so that the battery module can supply power to the control module and the electronic device can work normally.

[0059] When the lithium battery protection chip U1 detects that the voltage of any cell in the battery module is higher than the first threshold through the two voltage detection terminals (V1 pin and V2 pin), the charging control terminal (OC pin) will output a low-level signal. The switching transistor Q3 responds to the low-level signal and turns off, that is, it cuts off the charging circuit between the external power supply and the battery module, stops charging, and realizes the overcharge protection of the battery module.

[0060] When the lithium battery protection chip U1 detects that the voltage of any cell in the battery module is lower than the second threshold through the two voltage detection terminals (V1 pin and V2 pin), the discharge control terminal (OD pin) will output a low-level signal. Switching transistors Q1 and Q2 will turn off in response to the low-level signal, thus cutting off the connection between the battery module and the power supply circuit. This prevents the battery module from supplying power to the control module, stops the electronic device from working, and also realizes the over-discharge protection of the battery module.

[0061] Based on the circuit diagram above, since the charging control circuit 130 and the discharging control circuit 140 are discrete, high-power MOSFETs are not required for switching transistors Q1 and Q2, effectively reducing the system's static and dynamic power consumption, as well as the complexity and cost of the circuit design. Furthermore, it can be seen that the control module, power supply circuit, and battery module share a common ground, which reduces interference to the system when large currents occur. Only the ground connection needs to be ensured in the circuit design, resulting in virtually zero interference to the control module's signal processing.

[0062] It should be noted that, based on actual needs, selecting different electronic components and changing the high and low levels of their response signals according to the structure and principle of any of the above embodiments are variations that can be conceived by those skilled in the art and still fall within the protection scope of this application.

[0063] Figure 4 This is a schematic diagram of the structure of an atomizing device provided in one embodiment of this application. Figure 4As shown, the atomizing device provided in this embodiment includes at least a battery module 410, an atomizing module 420, a control module 430, a power supply circuit 440, and a battery protection circuit 450.

[0064] In this embodiment, the atomizing device is enclosed to form a cavity, in which the battery module 410, atomizing module 420, control module 430, power supply circuit 440, and battery protection circuit 450 are housed. The battery module 410 is connected to the control module 430 through the power supply circuit 440, providing a stable and safe voltage / current to the control module 430. At the same time, the battery module 410 is connected to the atomizing module 420 to form a power circuit, supplying power to the atomizing module 420 so that it can generate aerosol under the control of the control module 430.

[0065] Battery module 410 typically includes at least one rechargeable battery, which can be charged via an external power source when its charge is low or when the user is not currently using the atomizing device. It is usually a lithium-ion battery, which has advantages such as high energy density, long lifespan, and low self-discharge rate. High energy density means that more electrical energy can be stored in a relatively small volume and weight, which is beneficial for the miniaturization and portability design of atomizing devices.

[0066] The atomization module 420 includes an atomizing matrix and a heating element for heating the atomizing matrix to generate an aerosol. When the battery module 410 supplies power to the heating element under the control of the control module 430, the current is converted into heat energy through the heating element. The heat is transferred to the aerosol generating matrix through direct or indirect contact, causing it to evaporate and form an aerosol for the user to inhale. Common types of heating elements include heating wires and ceramic heating elements.

[0067] The control module 430 is at least used to control the heating element in the atomization module 420 to heat to a target temperature corresponding to a preset heating strategy and / or temperature-time curve, manage the charging of the battery module 410, and control the atomization device to perform one or more other functions. In some embodiments, the control module 430 includes means such as a central processing unit (CPU), microcontroller unit (MCU), field-programmable gate array (FPGA), and digital signal processing (DSP) for interpreting computer instructions and processing data in computer software. In some embodiments, the control module 430 is used to execute various computer applications in a computer-readable storage medium, thereby performing corresponding methods.

[0068] In this embodiment, the battery protection circuit 450 includes a voltage monitoring unit 4510, a charge / discharge protection unit 4520, and separate charging control circuit 4530 and discharging control circuit 4530.

[0069] The voltage monitoring unit 4510 has at least one voltage detection terminal, a charging control terminal, and a discharging control terminal; the voltage detection terminal is connected to the positive terminal of the battery module 410 and is used to detect the voltage of the battery module 410; the charging control terminal is used to output an overcharge protection signal when the voltage of the battery module 410 is detected to be higher than a first threshold; and the discharging control terminal is used to output an over-discharge protection signal when the voltage of the battery module 410 is detected to be lower than a second threshold.

[0070] The charging control circuit 4530 is connected between the battery module 410 and an external power source, and the discharging control circuit 4530 is connected between the battery module 410 and the power supply circuit 440.

[0071] The charge / discharge protection unit 4520 includes a charge on / off circuit disposed in the charge control circuit 4530 and a discharge on / off circuit disposed in the discharge control circuit 4530. The charge on / off circuit responds to the overcharge protection signal by disconnecting the connection between the external power supply and the battery module 410, so that the battery module 410 stops obtaining voltage from the external power supply for charging. The discharge on / off circuit responds to the overcharge protection signal by disconnecting the connection between the battery module 410 and the power supply circuit 440, so that the battery module 410 stops supplying power to the control module 430, thereby realizing over-discharge protection for the battery module 410.

[0072] It should be noted that the structure and implementation principle of the battery protection circuit 450 in this embodiment are the same as those described above. Figure 1-3 They belong to the same battery protection circuit and have the same technical effect, so they will not be described again here to avoid repetition.

[0073] In summary, the battery protection circuit in the atomizing device provided in this embodiment, by separately setting up the charging control circuit and the discharging control circuit, establishes a safer, more efficient, and reliable battery protection system for the atomizing device, thereby improving the safety of the atomizing device.

[0074] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art, under the guidance of this application, can make several simple deductions, modifications or substitutions based on the spirit of this application and the scope of protection of the claims without departing from the spirit of this application and the claims. All of these are within the protection scope of this application.

Claims

1. A battery protection circuit applied to an electronic device, the electronic device including a battery module, a control module, and a power supply circuit connected between the battery module and the control module, the power supply circuit being used to receive the output voltage of the battery module and supply power to the control module; Its features are, The battery protection circuit includes: A voltage monitoring unit has at least one voltage detection terminal, a charging control terminal, and a discharging control terminal; the voltage detection terminal is connected to the positive terminal of the battery module and is used to detect the voltage of the battery module; the charging control terminal is used to output an overcharge protection signal when the detected voltage of the battery module is higher than a first threshold; the discharging control terminal is used to output an over-discharge protection signal when the detected voltage of the battery module is lower than a second threshold. The battery module has a separate charging control circuit and a discharging control circuit. The charging control circuit is connected between the battery module and an external power source, and the discharging control circuit is connected between the battery module and the power supply circuit. The charge / discharge protection unit includes a charge on / off circuit disposed in the charging control circuit and a discharge on / off circuit disposed in the discharging control circuit. The charge on / off circuit is used to disconnect the connection between the external power supply and the battery module in response to the overcharge protection signal, so that the battery module stops obtaining voltage from the external power supply for charging, thereby realizing overcharge protection of the battery module. The discharge on / off circuit is used to disconnect the connection between the battery module and the power supply circuit in response to the overcharge protection signal, so that the battery module stops supplying power to the control module, thereby realizing over-discharge protection of the battery module.

2. The battery protection circuit according to claim 1, characterized in that, The discharge switching circuit includes a first switching circuit, the control terminal of the first switching circuit is connected to the discharge control terminal, the first terminal of the first switching circuit is connected to the battery module, and the second terminal of the first switching circuit is connected to the power supply circuit.

3. The battery protection circuit according to claim 2, characterized in that, The first switching circuit includes a switching transistor Q1, a switching transistor Q2, a resistor R1, a resistor R2, and a resistor R3; The first end of resistor R2 is connected to the control terminal of the first switching circuit; the control terminal of switch Q1 is connected to the second end of resistor R2, and the first end of switch Q1 is grounded; the control terminal of switch Q2 is connected to the second end of switch Q1, the first end of switch Q2 is connected to the first terminal of the first switching circuit, and the second end of switch Q2 is connected to the second terminal of the first switching circuit; the first end of resistor R1 is connected to the first end of switch Q2, and the second end of resistor R1 is connected to the second end of switch Q1; the first end of resistor R3 is connected to the second end of resistor R2, and the second end of resistor R3 is grounded.

4. The battery protection circuit according to claim 3, characterized in that, The first switching circuit further includes a diode D1; the first end of the diode D1 is connected to the first end of the first switching circuit, and the second end of the diode D1 is connected to the first end of the switching transistor Q2.

5. The battery protection circuit according to claim 1, characterized in that, The charging on / off circuit includes a switching transistor Q3. The control terminal of the switching transistor Q3 is connected to the charging control terminal. The first terminal of the switching transistor Q3 is connected to a preset voltage terminal, and the second terminal of the switching transistor Q3 is connected to the negative terminal of the battery module.

6. The battery protection circuit according to claim 1, characterized in that, The voltage monitoring unit is a lithium battery protection chip; the lithium battery protection chip has at least one voltage detection terminal, which is connected to the positive terminal of at least one battery in the battery module through a resistor.

7. An atomizing device, characterized in that, include: A battery module, comprising at least one rechargeable battery; An atomization module includes an atomization matrix and a heating element for heating the atomization matrix to generate an aerosol; A control module, at least for controlling the heating of the heating element and the charging of the battery module; A power supply circuit, connected between the battery module and the control module, is used to receive the voltage output by the battery module and supply power to the control module; The battery protection circuit includes a voltage monitoring unit, a charge / discharge protection unit, and separate charging control circuits and discharging control circuits. The voltage monitoring unit has at least one voltage detection terminal, a charging control terminal, and a discharging control terminal; the voltage detection terminal is connected to the positive terminal of the battery module and is used to detect the voltage of the battery module; the charging control terminal is used to output an overcharge protection signal when the voltage of the battery module is detected to be higher than a first threshold; the discharging control terminal is used to output an over-discharge protection signal when the voltage of the battery module is detected to be lower than a second threshold. The charging control circuit is connected between the battery module and an external power source, and the discharging control circuit is connected between the battery module and the power supply circuit. The charge / discharge protection unit includes a charge on / off circuit disposed in the charge control circuit and a discharge on / off circuit disposed in the discharge control circuit. The charge on / off circuit, in response to the overcharge protection signal, disconnects the connection between the external power supply and the battery module, so that the battery module stops obtaining voltage from the external power supply for charging. The discharge on / off circuit, in response to the overcharge protection signal, disconnects the connection between the battery module and the power supply circuit, so that the battery module stops supplying power to the control module, thereby realizing over-discharge protection for the battery module.

8. The atomizing device according to claim 7, characterized in that, The discharge switching circuit includes a switch Q1, a diode D1, a switch Q2, a resistor R1, a resistor R2, and a resistor R3; The first end of resistor R2 is connected to the discharge control terminal; the control terminal of switch Q1 is connected to the second end of resistor R2, and the first end of switch Q1 is grounded; the first end of diode D1 is connected to the battery module; the control terminal of switch Q2 is connected to the second end of switch Q1, the first end of switch Q2 is connected to the second end of diode D1, and the second end of switch Q2 is connected to the power supply circuit; the first end of resistor R1 is connected to the first end of switch Q2, and the second end of resistor R1 is connected to the second end of switch Q1; the first end of resistor R3 is connected to the second end of resistor R2, and the second end of resistor R3 is grounded.

9. The atomizing device according to claim 7, characterized in that, The charging on / off circuit includes a switching transistor Q3. The control terminal of the switching transistor Q3 is connected to the charging control terminal. The first terminal of the switching transistor Q3 is connected to a preset voltage terminal, and the second terminal of the switching transistor Q3 is connected to the negative terminal of the battery module.

10. The atomizing device according to claim 7, characterized in that, The voltage monitoring unit is a lithium battery protection chip; the lithium battery protection chip has at least one voltage detection terminal, and the voltage detection terminal is connected to the positive terminal of at least one battery in the battery module through a resistor; The control module includes a microprocessor; the microprocessor, the power supply circuit, and the battery module share a common ground.

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