Atomization circuit and electronic atomization device
By employing multiple parallel overcurrent protection units in the electronic atomization device, the problem of increased cost under high current is solved, achieving low-cost and stable overcurrent protection and reducing the overall cost of the electronic atomization device.
Patent Information
- Application Number
- CN202422716966.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-07
AI Technical Summary
In existing electronic atomization devices, the design of multiple heating elements leads to increased current, requiring high-cost overcurrent protection chips, which in turn increases the overall cost.
Multiple overcurrent protection units are used in parallel. By superimposing overcurrent protection points, the cost of overcurrent protection is reduced. Lower-cost battery protection chips are used, and the parallel overcurrent protection units achieve overcurrent protection under high current.
It achieves effective overcurrent protection under high current, reduces the overall cost of electronic atomization devices, and improves the stability and reliability of overcurrent protection.
Smart Images
Figure CN223600857U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The embodiments of the present application relate to the technical field of electronic circuit, in particular to an atomization circuit and an electronic atomization device. BACKGROUND
[0002] With the development of electronic atomization devices, electronic atomization devices using multiple heating bodies appear in the market. For the above type of electronic atomization devices, the output power of the electronic atomization device will also increase accordingly, that is, the total current of the electronic atomization device increases, which leads to the need for higher current to achieve overcurrent protection, that is, a battery protection chip with a higher over-discharge current protection point is needed. However, this will result in higher cost. CONTENT OF THE UTILITY MODEL
[0003] The embodiments of the present application provide an atomization circuit and an electronic atomization device, which can achieve the purpose of reducing cost.
[0004] In a first aspect, the embodiments of the present application provide an atomization circuit, comprising:
[0005] A heating module, comprising one heating body or at least two parallelly connected heating bodies, a first end of the heating module being connected to a positive pole of a power supply, and a second end of the heating module being grounded;
[0006] An overcurrent protection module, a first end of the overcurrent protection module being grounded, a second end of the overcurrent protection module being connected to the positive pole of the power supply, and a third end of the overcurrent protection module being connected to a negative pole of the power supply, the overcurrent protection module being configured to disconnect the connection between the negative pole of the power supply and the ground when the current flowing through the heating module is greater than or equal to a preset current threshold, and being configured to establish the connection between the negative pole of the power supply and the ground when the current flowing through the heating module is less than the preset current threshold, wherein the overcurrent protection module comprises at least two parallelly arranged overcurrent protection units.
[0007] In one or more embodiments, the atomization circuit further comprises:
[0008] A filtering module connected between the positive pole of the power supply and the negative pole of the power supply, and configured to filter the voltage of the power supply.
[0009] In one or more embodiments, the atomization circuit further comprises:
[0010] A control module configured to output a control signal.
[0011] A switch module is connected between the positive pole of the power supply and the first end of the heat generating module, and is connected with the control module, and is configured to be turned on or turned off in response to the control signal, wherein the connection between the positive pole of the power supply and the first end of the heat generating module is established when the switch module is turned on, and the connection between the positive pole of the power supply and the first end of the heat generating module is disconnected when the switch module is turned off.
[0012] In one or more embodiments, the overcurrent protection unit comprises a battery protection chip;
[0013] The negative pole end of the battery protection chip is the first end of the overcurrent protection module, the power supply end of the battery protection chip is the second end of the overcurrent protection module, and the ground end of the battery protection chip is the third end of the overcurrent protection module.
[0014] In one or more embodiments, the battery protection chip adopts an SOT23-5 packaging mode.
[0015] In one or more embodiments, the specifications of each battery protection chip are the same.
[0016] In one or more embodiments, the filter module comprises a first resistor and a capacitor;
[0017] The first resistor and the capacitor are connected in series between the positive pole of the power supply and the negative pole of the power supply, and the connection point between the first resistor and the capacitor is connected with the second end of the overcurrent protection module.
[0018] In one or more embodiments, the switch module comprises a second resistor and a switch tube;
[0019] The second resistor is connected between the first end and the second end of the switch tube, the first end of the switch tube is connected with the control module, the second end of the switch tube is connected with the positive pole of the power supply, and the third end of the switch tube is connected with the first end of the heat generating module.
[0020] In one or more embodiments, the switch tube is a PMOS tube, the first end of the switch tube is the gate of the PMOS tube, the second end of the switch tube is the source of the PMOS tube, and the third end of the switch tube is the drain of the PMOS tube.
[0021] In a second aspect, the embodiments of the present application provide an electronic atomization device, comprising:
[0022] The atomization circuit as described above;
[0023] A power supply connected with the atomization circuit to supply power for the atomization circuit.
[0024] The beneficial effects of this application are as follows: The atomization circuit of this application embodiment includes a heating module and an overcurrent protection module. The heating module includes one heating element or at least two heating elements connected in parallel. The first terminal of the heating module is connected to the positive terminal of the power supply, and the second terminal is grounded. The first terminal of the overcurrent protection module is grounded, the second terminal is connected to the positive terminal of the power supply, and the third terminal is connected to the negative terminal of the power supply. When the current flowing through the heating module is greater than or equal to a preset current threshold, an overcurrent abnormality occurs. The overcurrent protection module can then disconnect the connection between the negative terminal of the power supply and ground, thereby achieving the overcurrent protection function. Furthermore, since the overcurrent protection module includes at least two overcurrent protection units connected in parallel, the actual overcurrent protection point is the sum of the overcurrent protection points of each overcurrent protection unit, thus achieving a higher overcurrent protection point. Compared to battery protection chips in related technologies that require higher overcurrent protection points, this results in lower costs, achieving the goal of cost reduction. Attached Figure Description
[0025] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are not intended to limit the embodiments, and elements having the same reference numerals in the drawings are designated as similar elements.
[0026] Figure 1 This is a schematic diagram of the atomizing circuit provided in the embodiments of this application. Figure 1 ;
[0027] Figure 2 This is a schematic diagram of the atomizing circuit provided in the embodiments of this application. Figure 2 ;
[0028] Figure 3 This is a schematic diagram of the atomizing circuit provided in the embodiments of this application. Figure 3 ;
[0029] Figure 4 Is with Figure 3 The circuit structure corresponding to the block diagram shown. Detailed Implementation
[0030] 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 thoroughly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0031] It is to be noted that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements can exist between them.
[0032] In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.
[0033] Please refer to Figure 1 , Figure 1 The schematic diagram of the composition block diagram of the atomization circuit provided by the embodiments of the present application is shown in FIG. 1. As shown in FIG. 1, the atomization circuit 100 includes a heating module 10 and an overcurrent protection module 20. Figure 1
[0034] The heating module 10 includes one heating body La1 or at least two parallelly connected heating bodies, and the at least two parallelly connected heating bodies include a first heating body Lb1, a second heating body Lb2, …, and an Nth heating body LbN, where N is an integer greater than or equal to 2. The first end of the heating module 10 is connected to the positive pole BAT+ of the power supply, and the second end of the heating module 10 is grounded GND. The heating body is an object or device capable of generating heat, such as a resistance heating body or a coil heating body, etc.
[0035] The first end of the overcurrent protection module 20 is grounded GND, the second end of the overcurrent protection module 20 is connected to the positive pole BAT+ of the power supply, and the third end of the overcurrent protection module 20 is connected to the negative pole BAT- of the power supply. The overcurrent protection module 20 is configured to disconnect the connection between the negative pole BAT- of the power supply and the ground GND when the current flowing through the heating module 10 is greater than or equal to a preset current threshold, wherein when the connection between the negative pole BAT- of the power supply and the ground GND is disconnected, the entire circuit is cut off, and the heating module 10 loses power and stops running. The overcurrent protection module 20 is also configured to establish the connection between the negative pole BAT- of the power supply and the ground GND when the current flowing through the heating module 10 is less than the preset current threshold, wherein when the connection between the negative pole BAT- of the power supply and the ground GND is established, the heating module 10 can normally operate. The preset current threshold is a pre-set current threshold, which can be set based on the actual application scenario, and the embodiments of the present application do not make specific limitations. The overcurrent protection module 20 includes at least two parallelly arranged overcurrent protection units, i.e., the overcurrent protection module 20 includes a first overcurrent protection unit U1, a second overcurrent protection unit U2, …, and a Kth overcurrent protection unit UK, where K is an integer greater than or equal to 2.
[0036] In this embodiment, when the heat generating module 10 includes one heat generating body La1 and the resistance of the heat generating body La1 is low, or when the heat generating module 10 includes the first heat generating body Lb1, the second heat generating body Lb2, …, and the Nth heat generating body LbN connected in parallel, the total current flowing through the electronic atomization device including the atomization circuit 100 is large, especially when the resistance of the heat generating body La1 is lower or N is larger, the total current flowing through the electronic atomization device is larger. Therefore, it is necessary to implement overcurrent protection at a higher current.
[0037] In the related art, a battery protection chip with a higher over-discharge current protection point is usually used. However, the cost of such a battery protection chip is high, which in turn leads to a higher cost of the electronic atomization device. When the battery protection chip detects that the input current (i.e., the current flowing through the battery protection chip) exceeds a certain preset safety threshold, the circuit is automatically cut off. This preset safety threshold is the over-discharge current protection point.
[0038] In the embodiments of the present application, however, a plurality of overcurrent protection units, i.e., the first overcurrent protection unit U1, the second overcurrent protection unit U2, …, and the Kth overcurrent protection unit UK are connected in parallel to superimpose the over-discharge current protection points of the overcurrent protection units to implement overcurrent protection at a higher current. Since the over-discharge current protection point of the overcurrent protection unit is low, the cost of the overcurrent protection unit is low, and even if a plurality of overcurrent protection units are selected, the cost is still less than that of the battery protection chip. For example, when the over-discharge current protection point is doubled, the cost of the battery protection chip used is usually quadrupled, while only two overcurrent protection units are needed at this time, and the cost is doubled, which is much less than that of the battery protection chip with a higher over-discharge current protection point.
[0039] In some embodiments, the difference between the input currents of any two overcurrent protection units when the connection between the negative electrode BAT- of the power supply and the ground GND is disconnected is less than a preset difference.
[0040] The input current of the overcurrent protection unit is the current flowing through the overcurrent protection unit, i.e., the current flowing through the heat generating module 10. The preset difference is a preset difference, which can be set based on the actual application scenario, and the embodiments of the present application do not make specific limitations thereto.
[0041] Specifically, the difference between the input currents corresponding to the disconnection of the connection between the negative electrode BAT- of the power supply and the ground GND by any two overcurrent protection units is less than a preset difference value, and the protection points of the overdischarge currents corresponding to any two overcurrent protection units are relatively close or equal. For example, taking K=2 as an example, that is, the overcurrent protection module 20 includes a first overcurrent protection unit U1 and a second overcurrent protection unit U2, the input current (that is, the current flowing through the heating module 10, denoted as I1) corresponding to the disconnection of the connection between the negative electrode BAT- of the power supply and the ground GND by the first overcurrent protection unit U1; the input current (that is, the current flowing through the heating module 10, denoted as I2) corresponding to the disconnection of the connection between the negative electrode BAT- of the power supply and the ground GND by the second overcurrent protection unit U2, the difference between the current I1 and the current I2 is less than the preset difference value. Thus, when the current flowing through the heating module 10 is greater than or equal to the preset current threshold, the first overcurrent protection unit U1, the second overcurrent protection unit U2, …, and the Kth overcurrent protection unit UK can all realize overcurrent protection within a short interval of time, thereby improving the stability and reliability of overcurrent protection.
[0042] In some embodiments, as shown in FIG. 1, the atomization circuit 100 further includes a filtering module 30 connected between the positive electrode BAT+ of the power supply and the negative electrode BAT- of the power supply. The filtering module 30 is configured to filter the voltage of the power supply. The filtering module 30 can reduce the noise and ripple in the voltage of the power supply to improve the quality of the power supply, ensure that the voltage of the power supply is more stable and smooth, and prevent the first overcurrent protection unit U1, the second overcurrent protection unit U2, …, and the Kth overcurrent protection unit UK from being damaged due to excessive voltage of the power supply, thereby protecting the first overcurrent protection unit U1, the second overcurrent protection unit U2, …, and the Kth overcurrent protection unit UK. Figure 2
[0043] In some embodiments, as shown in FIG. 1, the atomization circuit 100 further includes a control module 40 and a switching module 50. The switching module 50 is connected between the positive electrode BAT+ of the power supply and the first end of the heating module 10, and is connected with the control module 40. Figure 3
[0044] Specifically, the control module 40 is configured to output a control signal. The switching module 50 is configured to be turned on or turned off in response to the control signal. When the switching module 50 is turned on, the connection between the positive electrode BAT+ of the power supply and the first end of the heating module 10 is established, and at this time, when overcurrent protection does not occur, the heating module 10 is powered on and can operate normally. When the switching module 50 is turned off, the connection between the positive electrode BAT+ of the power supply and the first end of the heating module 10 is disconnected.
[0045] For example, the control signal can be a PWM signal, and then by adjusting the duty cycle of the PWM signal, the voltage applied to the heat generating module 50 can be adjusted.
[0046] Please refer to Figure 4 , Figure 4 For the circuit structure corresponding to the block diagram shown in Figure 3 As shown in Figure 4 , the overcurrent protection unit includes a battery protection chip, that is, the first overcurrent protection unit U1, the second overcurrent protection unit U2, …, and the Kth overcurrent protection unit UK all include a battery protection chip.
[0047] Among them, the negative terminal of the battery protection chip (that is, the VM pin of the battery protection chip) is the first terminal of the overcurrent protection module, the power terminal of the battery protection chip (that is, the VDD pin of the battery protection chip) is the second terminal of the overcurrent protection module, and the ground terminal of the battery protection chip (that is, the GND pin of the battery protection chip) is the third terminal of the overcurrent protection module.
[0048] Specifically, when the current flowing through the heat generating module 10 is greater than or equal to the preset current threshold, the connection between the negative terminal of the battery protection chip and the ground terminal of the battery protection chip is disconnected; when the current flowing through the heat generating module 10 is less than the preset current threshold, the connection between the negative terminal of the battery protection chip and the ground terminal of the battery protection chip is established.
[0049] In some embodiments, the battery protection chip adopts a lithium battery protection chip with a model number of xb5606.
[0050] In some embodiments, the battery protection chip adopts an SOT23-5 packaging method. Since multiple battery protection chips are connected in parallel, more space is needed. By adopting the SOT23-5 packaging method, the space occupied by the battery protection chip can be relatively small, which can be suitable for application scenarios with limited space.
[0051] In some embodiments, the specifications of each battery protection chip are the same. Therefore, the over-discharge current protection points of any two battery protection chips are relatively close or equal; when the current flowing through the heat generating module 10 is greater than or equal to the preset current threshold, each battery protection chip can realize overcurrent protection within a short interval, the response speed is fast, and it is beneficial to improve the stability and reliability of overcurrent protection.
[0052] In some embodiments, the filter module 30 includes a first resistor R1 and a capacitor C1.
[0053] The first resistor R1 and the capacitor C1 are connected in series between the positive pole BAT+ of the power supply and the negative pole BAT- of the power supply, and a connection point between the first resistor R1 and the capacitor C1 is connected with the second end of the overcurrent protection module 10. The first resistor R1 and the capacitor C1 form an RC filter, and the RC filter attenuates unwanted frequency components through the combination of resistors and capacitors, thereby improving the stability and smoothness of the power supply output.
[0054] In some embodiments, the switch module 50 includes a second resistor R2 and a switch tube Q1.
[0055] The second resistor R2 is connected between the first end and the second end of the switch tube Q1, the first end of the switch tube Q1 is connected with the control module 40, the second end of the switch tube Q1 is connected with the positive pole BAT+ of the power supply, and the third end of the switch tube Q1 is connected with the first end of the heat generating module 10. Thus, through the pull-up action of the second resistor R2, the first end of the switch tube Q1 can be prevented from being in a high resistance state during power-on, so that the first end of the switch tube Q1 has a certain level to control the switch tube Q1. In addition, the second resistor R2 can also provide a discharge current during the disconnection of the switch tube Q1 to ensure that the switch tube Q1 can be reliably turned off.
[0056] In this embodiment, the switch tube Q1 is taken as a PMOS tube as an example. The first end of the switch tube Q1 is the gate (i.e., G terminal) of the PMOS tube, the second end of the switch tube Q1 is the source (i.e., S terminal) of the PMOS tube, and the third end of the switch tube Q1 is the drain (i.e., D terminal) of the PMOS tube. When the control signal input at the G terminal is at a high level, the PMOS tube is disconnected at this time, and the power supply cannot supply power to the heat generating module 10; when the control signal input at the G terminal is at a low level, the PMOS tube is turned on, and the circuit between the power supply and the heat generating module 10 is connected, and the power supply can provide power to the heat generating module 10.
[0057] In addition, the switch tube Q1 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate-commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field-effect transistor (JFET) device, a MOS-controlled thyristor (MCT) device, etc. In addition, Figure 4 The switch tube Q1 shown in the figure can be implemented as a plurality of switches connected in parallel.
[0058] The electronic atomization device provided in the embodiments of the present application also includes the atomization circuit 100 and the power supply.
[0059] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the present application specification and drawings, is also included in the patent protection scope of the present application.
[0060] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order. Those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. An atomization circuit, characterized by, The application relates to an atomization circuit. The atomization circuit comprises: a heating module, a current protection module, a filter module, a control module and a switch module. The heating module comprises one heating body or at least two heating bodies connected in parallel, a first end of the heating module is connected with a positive pole of a power supply, and a second end of the heating module is grounded.
2. The fogging circuit of claim 1, wherein, The current protection module comprises at least two current protection units arranged in parallel, a first end of the current protection module is grounded, a second end of the current protection module is connected with the positive pole of the power supply, and a third end of the current protection module is connected with a negative pole of the power supply. The filter module is connected between the positive pole of the power supply and the negative pole of the power supply and is configured to filter the voltage of the power supply.
3. The fogging circuit of claim 1, wherein, The control module is configured to output a control signal. The switch module is connected between the positive pole of the power supply and the first end of the heating module and is connected with the control module and is configured to be turned on or turned off in response to the control signal. The current protection unit comprises a battery protection chip.
4. The fogging circuit of claim 1, wherein, The negative pole end of the battery protection chip is the first end of the current protection module, the power supply end of the battery protection chip is the second end of the current protection module, and the ground end of the battery protection chip is the third end of the current protection module. The battery protection chip adopts an SOT23-5 packaging mode.
5. The fogging circuit of claim 4, wherein, The specifications of the battery protection chips are the same.
6. The fogging circuit of claim 4, wherein, The filter module comprises a first resistor and a capacitor.
7. The fogging circuit of claim 2, wherein, The first resistor and the capacitor are connected in series between the positive pole of the power supply and the negative pole of the power supply, and a connection point between the first resistor and the capacitor is connected with the second end of the current protection module. The switch module comprises a second resistor and a switch tube.
8. The fogging circuit of claim 3, wherein, The second resistor is connected between the first end and the second end of the switch tube, the first end of the switch tube is connected with the control module, the second end of the switch tube is connected with the positive pole of the power supply, and the third end of the switch tube is connected with the first end of the heating module. The switch tube is a PMOS tube, the first end of the switch tube is the gate of the PMOS tube, the second end of the switch tube is the source of the PMOS tube, and the third end of the switch tube is the drain of the PMOS tube.
9. The fogging circuit of claim 8, wherein, The application relates to an atomization circuit.
10. An electronic atomizing device, characterized by, The atomization circuit comprises the atomization circuit according to any one of claims 1-9. The power supply is connected with the atomization circuit and supplies power for the atomization circuit.