Aerosol-generating device
By incorporating charging protection circuits and reverse connection protection circuits into the aerosol generation device, the problems of expensive lithium battery protection chips and insufficient safety are solved, achieving cost reduction and improved safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN FIRST UNION TECH CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-07-10
AI Technical Summary
The lithium battery protection chips used in existing aerosol generation devices are expensive and lack reverse connection protection, resulting in high device costs and safety risks.
The charging protection circuit and the reverse connection protection circuit are respectively set on different branches of the battery cell. The charging protection circuit performs the protection function during the charging process, and the reverse connection protection circuit cuts off the current path when the battery cell is reverse connected. Combined with the low rated current lithium battery protection chip and the switching transistor, dual reverse connection protection is achieved.
It reduces the cost of aerosol generation devices and improves device safety through dual reverse connection protection, preventing damage to the controller and charging components.
Smart Images
Figure CN224474079U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of aerosol generation technology, and in particular to an aerosol generation device. Background Technology
[0002] In a prior art example, a lithium battery protection chip is placed between the positive and negative terminals of the battery cell in the aerosol generation device to perform battery protection functions during both charging and discharging. However, the lithium battery protection chip, which performs battery protection functions during both charging and discharging, is relatively expensive, increasing the cost of the aerosol generation device. In addition, the lithium battery protection chip does not have reverse connection protection, posing a safety risk to the aerosol generation device in the event of reverse connection or other similar situations. Utility Model Content
[0003] The purpose of this application is to provide an aerosol generating device that can reduce the cost of the aerosol generating device and improve its safety.
[0004] At least one embodiment of this application provides an aerosol generating apparatus, which includes:
[0005] Battery cell;
[0006] A charging circuit is provided, wherein a first battery cell branch is established between the charging circuit and the battery cell, and the charging circuit is configured to connect to an external device to charge the battery cell.
[0007] A charging protection circuit is provided on the first cell branch, and the charging protection circuit is configured to perform cell protection function during the charging process of the cell;
[0008] The controller is electrically connected to the charging circuit, and a second battery cell branch is established between the controller and the battery cell;
[0009] A reverse connection protection circuit is installed on the second cell branch;
[0010] The controller is configured to shut down the anti-reverse connection circuit when the battery cell is reverse-connected, thereby cutting off the current path of the second battery cell branch.
[0011] As an example, the aerosol generating device further includes a heating circuit with a heating element, a third battery cell branch established between the heating circuit and the battery cell, the heating circuit being electrically connected to the controller, and the controller being configured to control the battery cell to output drive power to the heating circuit, thereby causing the heating element in the heating circuit to heat the aerosol generating matrix to generate aerosols.
[0012] As an example, the charging protection circuit includes a lithium battery protection chip.
[0013] As an example, the rated current of the lithium battery protection chip is less than or equal to 2A.
[0014] As an example, the reverse connection protection circuit includes a switching transistor.
[0015] As an example, the heating circuit also includes:
[0016] A detection circuit is electrically connected to the battery cell, the controller, and the heating element, respectively. The detection circuit is configured to detect whether the heating element is connected to the current path of the third battery cell branch.
[0017] A sampling circuit is electrically connected to the controller and the heating element respectively, and the controller is further configured to detect the resistance of the heating element through the sampling circuit;
[0018] The output circuit is electrically connected to the battery cell, the controller, and the heating element, respectively. The controller is further configured to determine the driving power based on the resistance value of the heating element and control the output circuit to output the driving power.
[0019] As an example, the heating circuit further includes a first electrical connection point and a second electrical connection point. The heating element is connected to the current path of the third battery cell branch through the first electrical connection point and the second electrical connection point. The first electrical connection point is electrically connected to the detection circuit, the sampling circuit and the output circuit respectively, and the second electrical connection point is electrically connected to the ground terminal.
[0020] As an example, the aerosol generating device further includes an airflow sensor connected to the controller and the reverse connection protection circuit, respectively. The controller is also configured to control the reverse connection protection circuit to shut down when the battery cell is reverse connected, thereby cutting off the current path of the battery cell and the airflow sensor, and to select the current path of the third battery cell branch in response to a suction signal sent by the airflow sensor.
[0021] As an example, the aerosol generating device further includes a display circuit connected to the controller and the reverse connection protection circuit, respectively. The controller is also configured to control the reverse connection protection circuit to shut down when the battery cell is reverse connected, thereby cutting off the current path between the battery cell and the display circuit, and to control the display circuit to display parameter information of the aerosol generating device.
[0022] As an example, the aerosol generating device also includes an external power supply electrically connected to the reverse connection protection circuit.
[0023] The aerosol generating device provided in the above embodiments uses a charging protection circuit installed on the first battery cell branch established between the charging circuit and the battery cell to perform a battery cell protection function during the charging process. This solves the problem that lithium battery protection chips, which perform battery cell protection functions during both the charging and discharging processes, are relatively expensive, thereby reducing the cost of the aerosol generating device. At the same time, a reverse connection protection circuit is installed on the second battery cell branch established between the controller and the battery cell. When the battery cell is reverse connected, the reverse connection protection circuit is turned off, thereby cutting off the current path of the second battery cell branch. Therefore, the safety of the aerosol generating device is improved. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0025] Figure 1 This is a schematic diagram of the structure of an aerosol generating apparatus provided in some embodiments of this application;
[0026] Figure 2 This is a schematic diagram of the structure of an aerosol generating apparatus provided in other embodiments of this application;
[0027] Figure 3 This is a circuit diagram of a charging protection circuit provided in some embodiments of this application;
[0028] Figure 4 This is a schematic diagram of the heating circuit provided in some embodiments of this application;
[0029] Figure 5 This is a circuit diagram of a heating circuit provided in some embodiments of this application;
[0030] Figure 6 This is a schematic diagram of the structure of an aerosol generating apparatus provided in some embodiments of this application. Detailed Implementation
[0031] 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0032] The terms "first," "second," and "third" used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship or movement of the components in a specific orientation (as shown in the accompanying drawings). If the specific orientation changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.
[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0034] Please refer to Figure 1 This application provides an embodiment of an aerosol generating apparatus 100, comprising:
[0035] The battery cell 10 serves as the power source for the aerosol generating device 100, providing power to the electrical modules / components of the aerosol generating device 100.
[0036] The charging circuit 20 has a first battery cell branch 11 established between the charging circuit 20 and the battery cell 10. The charging circuit 20 is configured to connect to an external device to charge the battery cell 10.
[0037] A charging protection circuit 30 is provided on the first cell branch 11, and the charging protection circuit 30 is configured to perform cell protection function during the charging process of the cell 10.
[0038] The controller 40 is electrically connected to the charging circuit 20, and a second battery cell branch 12 is established between the controller 40 and the battery cell 10.
[0039] In one embodiment, the charging circuit 20 includes a detection circuit and a charging management chip. The detection circuit detects the input voltage at the input terminal of the charging circuit 20. When the input voltage / detection voltage equals a preset voltage, the controller 40 outputs a charging signal to the charging management chip, causing the charging management chip to charge the battery cell 10 according to the preset charging voltage and charging current. In a preferred embodiment, the detection circuit includes a voltage divider circuit. In a specific embodiment, the voltage divider circuit includes a first resistor and a second resistor connected in series. The first resistor and the second resistor divide the input voltage of the external device to obtain the detection voltage. The controller 40 obtains the detection voltage. Alternatively, the controller 40 can calculate the input voltage based on the detection voltage and the resistance values of the first and second resistors, and then the controller 40 outputs a charging signal to the charging management chip based on the input voltage / detection voltage.
[0040] As an example, when the charging management chip charges the battery cell 10 according to a preset charging voltage and current for a preset time, the charging management chip shuts down the charging function, thereby interrupting the charging path between the external device and the battery cell 10. As another example, the controller 40 is also configured to detect the battery cell 10's charge level. When it detects that the battery cell 10 is fully charged or that the battery cell 10's charge level has reached a preset level, it sends a shutdown signal to the charging management chip, which then shuts down the charging function, thereby interrupting the charging path between the external device and the battery cell 10.
[0041] The reverse connection protection circuit 50 is installed on the second cell branch 12.
[0042] The controller 50 is configured to control the reverse connection protection circuit 50 to shut down when the battery cell 10 is reverse connected, thereby cutting off the current path of the second battery cell branch 12.
[0043] In some embodiments, the reverse connection protection circuit includes a switching transistor.
[0044] In one specific embodiment, the reverse connection protection circuit 50 includes a PMOS transistor. In other embodiments, the reverse connection protection circuit 50 may also include an NMOS transistor, a field-effect transistor, a thyristor, a triac, a transistor, an IGBT, or other switching devices.
[0045] It should be noted that the aerosol generating device 100 has dual reverse connection protection, which improves the safety of the aerosol generating device 100 and gives it a higher safety level. The reverse connection protection circuit 50 is one layer of protection. When the battery cell 10 is reverse-connected, the reverse connection protection circuit 50 shuts off, thereby cutting off the current path of the second battery cell branch 12 and protecting the control components, including the controller 40, from damage. The charging protection circuit 30 is the other layer of protection. When the battery cell 10 is reverse-connected, the switching device inside the charging protection circuit 30 shuts off, thereby cutting off the current path of the first battery cell branch 11 and protecting the charging components, including the charging circuit 20, from damage. In other words, when the battery cell 10 is reverse-connected, both the charging and control components of the aerosol generating device 100 have reverse connection protection.
[0046] Based on the above, please refer to Figure 2 and Figure 4 The aerosol generating device 100 also includes a heating circuit 60 with a heating element 61. A third battery cell branch 13 is established between the heating circuit 60 and the battery cell 10. The heating circuit 60 is also electrically connected to a controller 40. The controller 40 is also configured to control the battery cell 10 to output drive power to the heating circuit 60, thereby causing the heating element 61 in the heating circuit 60 to heat the aerosol generating matrix to generate aerosol.
[0047] Heating element 61 preferably comprises a resistive material. Suitable resistive materials include, but are not limited to, semiconductors, such as doped ceramics, conductive ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of semiconductor and ceramic materials. Alternatively, heating element 61 may comprise an infrared heating element, a photon source, or an induction heating element.
[0048] The heating element 61 can take any suitable form. For example, the heating element 61 can take the form of a heating plate. Alternatively, the heating element 61 can take the form of a housing or substrate with different conductive portions, or a resistive metal tube. A liquid storage section can be combined with a disposable heating element. Alternatively, if the aerosol generating matrix is liquid, one or more heating needles or rods through the liquid aerosol generating matrix may be suitable. Alternatively, the heating element 61 can be a dish (end) heater or a combination of a dish heater and a heating needle or rod. Alternatively, the heating element 61 can comprise a flexible sheet. Other alternatives include heating wires or filaments, such as nickel-chromium (Ni-Cr), platinum, tungsten, or alloy wires, or heating plates. Alternatively, the heating element 61 can be deposited in or on a rigid carrier material.
[0049] One or more heating elements 61 can be appropriately arranged to heat the aerosol generation matrix most effectively.
[0050] Through the above implementation, the power supply network of battery cell 10 is separated into the first battery cell branch 11, the second battery cell branch 12 and the third battery cell branch 13.
[0051] In some embodiments, the charging protection circuit 30 includes a lithium battery protection chip.
[0052] according to Figure 3 In the illustrated embodiment, the charging protection circuit 30 includes a lithium battery protection chip U1. The lithium battery protection chip U1 includes a VDD pin, a VM pin, and a GND pin. Both the VM pin and the GND pin are grounded. The VDD pin is connected to both the battery cell 10 and the charging circuit 20, and is used to receive the charging voltage output by the charging circuit 20, which is equal to the cell voltage VBAT of the battery cell 10. As an example, the lithium battery protection chip U1 can be an XB3303G model lithium battery protection chip. In some other embodiments, the charging protection circuit 30 also includes a resistor R1 and a capacitor C1, electrically connected to the corresponding pins of the lithium battery protection chip U1, which can realize a combination of one or more functions such as current limiting, pin protection, and filtering.
[0053] It should be noted that since the lithium battery protection chip U1 is configured to perform cell protection function during the charging process of cell 10, its internal structure is relatively simple and its cost is relatively low compared to lithium battery protection chips that realize overcharge, over-discharge, over-temperature, and short circuit protection during the charging and discharging processes of cell 10. This is of great significance for reducing the production cost of aerosol generation device 100.
[0054] In some embodiments, the rated current of the lithium battery protection chip is less than or equal to 2A.
[0055] As mentioned earlier, the power supply network for the separate battery cell 10 consists of a first battery cell branch 11, a second battery cell branch 12, and a third battery cell branch 13. Based on the principle of parallel current sharing, the current flowing through the first battery cell branch 11, the second battery cell branch 12, and the third battery cell branch 13 is reduced, thereby lowering the rated current requirement for the lithium battery protection chip. This is advantageous for selecting a low-cost lithium battery protection chip. Generally speaking, the lower the rated current of a lithium battery protection chip, the simpler its internal structure and the lower its cost. Therefore, selecting a low-cost lithium battery protection chip is sufficient to perform the battery cell protection function during the charging process of the battery cell 10.
[0056] according to Figure 4 and Figure 5 As shown, the heating circuit 60 also includes:
[0057] The detection circuit 62 is electrically connected to the battery cell 10, the controller 40 and the heating element 61 respectively. The detection circuit 62 is configured to detect whether the heating element 61 is connected to the current path of the third battery cell branch 13.
[0058] The sampling circuit 63 is electrically connected to the controller 40 and the heating element 61 respectively. The controller 40 is also configured to detect the resistance of the heating element 61 through the sampling circuit 63.
[0059] The output circuit 64 is electrically connected to the battery cell 10, the controller 40 and the heating element 61 respectively. The controller 40 is also configured to determine the driving power according to the resistance value of the heating element 61 and control the output circuit 64 to output the driving power.
[0060] Based on the above, the heating circuit 60 also includes a first electrical connection point 60a and a second electrical connection point 60b. The heating element 61 is connected to the current path of the third battery cell branch 13 through the first electrical connection point 60a and the second electrical connection point 60b. The first electrical connection point 60a is electrically connected to the detection circuit 62, the sampling circuit 63 and the output circuit 64 respectively, and the second electrical connection point 60b is electrically connected to the ground terminal.
[0061] In one embodiment, the aerosol generating device 100 includes a battery rod and an atomizer, wherein a detection circuit 62, a sampling circuit 63, and an output circuit 64 are located in the battery rod, and a heating element 61 is located in the atomizer. As an example, when the atomizer is inserted into the battery rod, the battery rod and the atomizer are electrically connected. At this time, the heating element 61 is electrically connected between a first electrical connection point 60a and a second electrical connection point 60b, such that the heating element 61 is connected to the current path of the third battery cell branch 13.
[0062] like Figure 5 As shown, the heating element 61 includes a heating wire RL. The detection circuit 62 includes a PMOS transistor Q1, resistors R2 and R3; the gate of PMOS transistor Q1 is connected to the R_EN pin of controller 40, the source of PMOS transistor Q1 is connected to the battery cell 10 to receive the battery cell voltage VBAT, the drain of PMOS transistor Q1 is electrically connected to the first electrical connection point 60a through resistor R3, and resistor R2 is electrically connected between the source and gate of PMOS transistor Q1. The sampling circuit 63 includes a resistor R4; one end of resistor R4 is electrically connected to the first electrical connection point 60a, and the other end of resistor R4 is connected to the RL_ADC pin of controller 40. The output circuit 64 includes a PMOS transistor Q2 and a resistor R5; the gate of PMOS transistor Q2 is connected to the RLPWM pin of controller 40, the drain of PMOS transistor Q2 is electrically connected to the first electrical connection point 60a, the source of PMOS transistor Q2 is connected to the battery cell 10 to receive the battery cell voltage VBAT, and resistor R5 is electrically connected between the source and gate of PMOS transistor Q2.
[0063] Based on the above, please refer to Figure 6 The aerosol generating device 100 also includes:
[0064] The airflow sensor 70 is connected to the controller 40 and the reverse connection protection circuit 50 respectively. The controller 40 is also configured to control the reverse connection protection circuit 50 to turn off when the battery cell 10 is reverse connected, thereby cutting off the current path of the battery cell 10 and the airflow sensor 70, and to select the current path of the third battery cell branch 13 in response to the suction signal sent by the airflow sensor 70.
[0065] The display circuit 80 is connected to the controller 40 and the reverse connection protection circuit 50 respectively. The controller 40 is also configured to control the reverse connection protection circuit 50 to turn off when the battery cell 10 is reverse connected, thereby cutting off the current path between the battery cell 10 and the display circuit 80, and to control the display circuit 80 to display the parameter information of the aerosol generating device 100.
[0066] The external power supply 90 is electrically connected to the reverse connection protection circuit 50.
[0067] The airflow sensor 70, display circuit 80, and external power supply 90 can be configured according to the actual needs of the aerosol generating device 100.
[0068] In summary, the aerosol generating device provided in this application embodiment uses a charging protection circuit installed on the first battery cell branch established between the charging circuit and the battery cell to perform a battery cell protection function during the charging process. This solves the problem that lithium battery protection chips, which perform battery cell protection functions during both the charging and discharging processes, are relatively expensive, thereby reducing the cost of the aerosol generating device. Simultaneously, an anti-reverse connection circuit is installed on the second battery cell branch established between the controller and the battery cell. When the battery cell is reverse-connected, the anti-reverse connection circuit is turned off, thereby cutting off the current path of the second battery cell branch. Therefore, the safety of the aerosol generating device is improved.
[0069] It should be noted that the preferred embodiments of this application are given in the specification and accompanying drawings, but are not limited to the embodiments described in this specification. Furthermore, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
Claims
1. An aerosol generating device, characterized in that, include: Battery cell; A charging circuit is provided, wherein a first battery cell branch is established between the charging circuit and the battery cell, and the charging circuit is configured to connect to an external device to charge the battery cell. A charging protection circuit is provided on the first cell branch, and the charging protection circuit is configured to perform cell protection function during the charging process of the cell; The controller is electrically connected to the charging circuit, and a second battery cell branch is established between the controller and the battery cell; A reverse connection protection circuit is installed on the second cell branch; The controller is configured to shut down the anti-reverse connection circuit when the battery cell is reverse-connected, thereby cutting off the current path of the second battery cell branch.
2. The aerosol generating apparatus according to claim 1, characterized in that, The aerosol generating device further includes a heating circuit with a heating element, a third battery cell branch is established between the heating circuit and the battery cell, the heating circuit is also electrically connected to the controller, and the controller is further configured to control the battery cell to output drive power to the heating circuit, thereby causing the heating element in the heating circuit to heat the aerosol generating matrix to generate aerosol.
3. The aerosol generating apparatus according to claim 1, characterized in that, The charging protection circuit includes a lithium battery protection chip.
4. The aerosol generating apparatus according to claim 3, characterized in that, The rated current of the lithium battery protection chip is less than or equal to 2A.
5. The aerosol generating apparatus according to claim 1, characterized in that, The reverse connection protection circuit includes a switching transistor.
6. The aerosol generating apparatus according to claim 2, characterized in that, The heating circuit also includes: A detection circuit is electrically connected to the battery cell, the controller, and the heating element, respectively. The detection circuit is configured to detect whether the heating element is connected to the current path of the third battery cell branch. A sampling circuit is electrically connected to the controller and the heating element respectively, and the controller is further configured to detect the resistance of the heating element through the sampling circuit; The output circuit is electrically connected to the battery cell, the controller, and the heating element, respectively. The controller is further configured to determine the driving power based on the resistance value of the heating element and control the output circuit to output the driving power.
7. The aerosol generating apparatus according to claim 6, characterized in that, The heating circuit further includes a first electrical connection point and a second electrical connection point. The heating element is connected to the current path of the third battery cell branch through the first electrical connection point and the second electrical connection point. The first electrical connection point is electrically connected to the detection circuit, the sampling circuit and the output circuit respectively, and the second electrical connection point is electrically connected to the ground terminal.
8. The aerosol generating apparatus according to claim 2, characterized in that, The aerosol generating device further includes an airflow sensor connected to the controller and the reverse connection protection circuit, respectively. The controller is also configured to control the reverse connection protection circuit to shut down when the battery cell is reverse connected, thereby cutting off the current path of the battery cell and the airflow sensor, and to select the current path of the third battery cell branch in response to the suction signal sent by the airflow sensor.
9. The aerosol generating apparatus according to claim 1, characterized in that, The aerosol generating device further includes a display circuit, which is connected to the controller and the reverse connection protection circuit respectively. The controller is also configured to control the reverse connection protection circuit to turn off when the battery cell is reverse connected, thereby cutting off the current path between the battery cell and the display circuit, and to control the display circuit to display the parameter information of the aerosol generating device.
10. The aerosol generating apparatus according to claim 1, characterized in that, The aerosol generating device also includes an external power supply, which is electrically connected to the reverse connection protection circuit.