A charging control circuit and an atomization device

Abstract

The application discloses a charging control circuit and an atomization device, wherein the charging control circuit is applied to a battery of the atomization device and comprises a charging interface; the charging interface is provided with a power supply pin; a first charging chip is provided with a first input pin and a first output pin and is used for transforming an external current to output a first current; a second charging chip is provided with a second input pin and a second output pin and is used for transforming an external current to output a second current; an output port is electrically connected with the first output pin and the second output pin and is used for inputting a current to the battery; and the first input pin and the second input pin are electrically connected with the power supply pin. The first charging chip and the second charging chip respectively transform and output the first current and the second current, the heat dissipation burden of each chip is small, the heat generated in the charging process is dispersed, the concentration of the heat is reduced, the working efficiency and the service life of the chip are improved, and the risk of failure caused by overheating is reduced.

Description

Technical Field

[0001] This application relates to the field of atomization, and more particularly to a charging control circuit and an atomization device. Background Technology

[0002] The power supply for atomizing devices consists of a PCB board, a rechargeable battery, and various other circuits. The PCB board is generally small and thin. The lithium battery that powers the e-cigarette is usually placed close to the PCB board. The charging design of the PCB board is generally completed by a single charging chip. When the temperature is high, the charging current will automatically decrease, resulting in longer charging time and affecting the user's charging experience.

[0003] Furthermore, if the battery is too close to the charging chip, it may cause the local temperature of the lithium battery to become too high, posing a safety risk. Utility Model Content

[0004] The technical problem to be solved by this application is to address the issue that existing atomizing devices reduce the charging current due to excessively high operating temperature of the charging chip and cause safety risks to the battery cell due to excessively high local temperature of the battery cell during charging. To this end, a charging control circuit and an atomizing device are provided.

[0005] The technical solution adopted by this application to solve its technical problem is: a charging control circuit applied to the battery cell of an atomizing device, comprising: a charging interface for receiving external current; the charging interface having a power supply pin; a first charging chip having a first input pin and a first output pin for converting the external current to output a first current; a second charging chip having a second input pin and a second output pin for converting the external current to output a second current; and an output port configured to be electrically connected to the first output pin and the second output pin for inputting current to the battery cell; wherein the first input pin and the second input pin are configured to be electrically connected to the power supply pin.

[0006] In one embodiment, the charging control circuit includes: a first step-down resistor, one end of which is electrically connected to the power supply pin and the other end of which is electrically connected to the first input pin; and / or a second step-down resistor, one end of which is electrically connected to the power supply pin and the other end of which is electrically connected to the second input pin.

[0007] In one embodiment, the charging control circuit includes a fuse resistor, one end of which is electrically connected to the power supply pin, and the other end of which is electrically connected to the first input pin and the second input pin.

[0008] In one embodiment, the output port includes a first port and a second port, and the first output pin and the second output pin are configured to be electrically connected to the first port; the charging control circuit includes a lithium battery protection chip for detecting the state of the battery cell; the input terminal of the lithium battery protection chip is electrically connected to the first port, and the output terminal of the lithium battery protection chip is electrically connected to the second port.

[0009] In one embodiment, the charging control circuit includes: a first capacitor for filtering the current; wherein one end of the first capacitor is electrically connected to the input terminal of the lithium battery protection chip, and the other end is electrically connected to the output terminal of the lithium battery protection chip.

[0010] In one embodiment, the charging control circuit includes: a second capacitor for filtering the current; wherein one end of the second capacitor is electrically connected to the first port, and the other end is configured to be grounded.

[0011] In one embodiment, the charging control circuit includes a third capacitor for regulating the input current; wherein one end of the third capacitor is electrically connected to the input terminal of the first step-down resistor and / or the second step-down resistor, and the other end is configured to be grounded.

[0012] In one embodiment, the first charging chip is provided with a first current regulating pin, and the charging control circuit includes: a first current regulating resistor for configuring parameters of the first current; wherein, one end of the first current regulating resistor is electrically connected to the first current regulating pin, and the other end is configured to be grounded.

[0013] In one embodiment, the second charging chip is provided with a second current regulating pin, and the charging control circuit includes: a second current regulating resistor for configuring parameters of the second current; wherein, one end of the second current regulating resistor is electrically connected to the second current regulating pin, and the other end is configured to be grounded.

[0014] In one embodiment, an atomizing device is also provided, including a battery cell and the charging control circuit described in any of the above embodiments.

[0015] The implementation of this application has the following beneficial effects: The charging control circuit provided by this application converts the output of the first current and the second current through the first charging chip and the second charging chip respectively, thereby dispersing the heat generated by the charging control circuit during the charging process. Compared with a large package chip, the heat dissipation burden of each chip is smaller, reducing the concentration of heat, which is conducive to improving the working efficiency and life of the chip and reducing the risk of failure due to overheating. In addition, the parallel arrangement of multiple small charging chips makes the layout on the circuit board more flexible, which can better adapt to different circuit board shapes, space constraints and wiring requirements, making it easier to design a compact and efficient charging circuit, reducing the area occupied by the circuit board and miniaturizing the circuit board. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this application, the following description will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this application and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0017] Figure 1 This is a circuit diagram of a charging control circuit according to this application;

[0018] Figure 2 This is another part of the circuit diagram of a charging control circuit of this application;

[0019] Figure 3 This is a schematic diagram of the structure of an atomizing device according to this application. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. 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.

[0021] 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.

[0022] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and do not imply any order or technical implications. Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages).

[0023] The temperature rise of individual charging chips in existing atomization devices is generally very high, which affects charging efficiency and chip stability, and may even shorten the lifespan of the chip and other components. In addition, the charging chip has a large area, which reduces the space left for other components on the circuit board, which may require a redesign of the layout and may even lead to an increase in the size of the circuit board, affecting the overall miniaturization and portability of e-cigarettes.

[0024] Therefore, this application proposes a charging control circuit that, without changing the circuit board area or even miniaturizing it, sets the charging circuit as two independent parallel charging chips. This disperses the heat generated during the charging process, improves heat dissipation, reduces the impact on charging, and enhances stability and lifespan. Simultaneously, each charging chip, as an independent small-package chip, can be flexibly spaced on the PCB circuit board, adapting to different circuit board shapes, reducing space constraints and wiring requirements, miniaturizing the circuit board area, and reducing the overall circuit board size.

[0025] 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 be described below with reference to the accompanying drawings.

[0026] Figure 1 This is a circuit diagram of a charging control circuit provided in one embodiment of this application. The charging control circuit provided in this embodiment can be used in the battery cell of an atomizing device, which includes a PCB board and a charging control circuit disposed on the PCB board.

[0027] like Figure 1As shown, the charging control circuit includes a first charging chip U3, a second charging chip U5, an output port, and a charging interface USB1. The first charging chip U3 and the second charging chip U5 are electrically connected to the charging interface USB1. The first charging chip U3 and the second charging chip U5 are mounted on the PCB board via connection pins and form a parallel circuit, with the first charging chip U3 and the second charging chip U5 spaced apart on the PCB board. Specifically, the first charging chip U3 has a first input pin (IN pin) and a first output pin (BAT pin) for converting external current to output a first current. The second charging chip U5 has a second input pin and a second output pin for converting external current to output a second current. The charging interface USB1 is used to receive external current and has a power supply pin. The first input pin and the second input pin are configured to be electrically connected to the power supply pin. The output port is configured to be electrically connected to the first output pin and the second output pin for inputting current to the battery cell 21.

[0028] In this embodiment, the first charging chip U3 and the second charging chip U5 are connected to the battery cell 21 via the first output pin and the second output pin, respectively. This allows the first charging chip U3 and the second charging chip U5 to be distributed across the circuit board, preventing the heat generated during charging from concentrating on a single area of ​​the PCB board and improving the PCB board's heat dissipation capacity. The reduced heat load on each chip and the dispersed distribution of heat generated during charging reduce the concentration of heat, which is beneficial for improving chip efficiency and lifespan, and lowering the risk of failure due to overheating.

[0029] In some embodiments, the first charging chip U3 and the second charging chip U5 are both small packaged chips with 5 pins, using SOT23 or MSOP packages, such as LTH7R, HP4059, HX6001F, etc. They have a smaller size, are more flexible in layout on the circuit board, and can better adapt to different circuit board shapes, space constraints and wiring requirements. This makes it easier to design compact and efficient charging circuits, reduce the area occupied by the circuit board, and miniaturize the circuit board.

[0030] Specifically, both the first charging chip U3 and the second charging chip U5 include an IN pin, a BAT pin, a GND pin, an ISET pin, and a CHRG pin. The IN pin is used to connect to the power supply, the BAT pin is connected to the battery cell, the GND pin is grounded, the ISET pin is used to set and monitor the charging current, and the CHRG pin is an open-drain charging status output pin used to determine the charging status of the battery cell. In other implementations, the first charging chip U3 and the second charging chip U5 can also be smaller charging chips with 6 or 8 pins to reduce the space occupied on the PCB board.

[0031] This embodiment uses the coordinated control of the first input pin and the first output pin, the second input pin and the second output pin to transform the external input current, and controls the first current and the second current to be input into the battery cell through the output port, thereby controlling the overall current input to the battery cell by the charging circuit.

[0032] In one embodiment, the charging circuit further includes a first step-down resistor R28 and / or a second step-down resistor R29, wherein one end of the first step-down resistor R28 is electrically connected to a power supply pin and the other end is electrically connected to a first input pin. One end of the second step-down resistor R29 is electrically connected to a power supply pin and the other end is electrically connected to a second input pin.

[0033] It should be noted that the first step-down resistor R28 is connected in series with the first charging chip U3, and the second step-down resistor R29 is connected in series with the second charging chip U5. They are used to reduce the voltage input to the first charging chip U3 and the second charging chip U5 respectively by voltage division to reduce the heat generation of the charging chips.

[0034] It is understandable that the first step-down resistor R28 and the second step-down resistor R29 can be replaced by a linear regulator, a potentiometer (variable resistor), a Zener diode (connected in parallel across the first charging chip U3 and the second charging chip U5), a transformer, etc., to divide the voltage between the first charging chip U3 and the second charging chip U5 through energy conversion or consumption, thereby reducing heat generation.

[0035] In one embodiment, the charging circuit further includes a first current-regulating resistor R20 for configuring parameters of the first current. The first charging chip U3 has a first current-regulating pin, one end of the first current-regulating resistor is electrically connected to the first current-regulating pin, and the other end is configured to be grounded.

[0036] In one embodiment, the charging circuit further includes a second current-regulating resistor R21 for configuring the second current. The second charging chip U5 has a second current-regulating pin, one end of the second current-regulating resistor is electrically connected to the second current-regulating pin, and the other end is configured to be grounded.

[0037] In some embodiments, a first charging chip U3, a first step-down resistor R28, and a first current-regulating resistor R20 form a first charging module 11, wherein the input terminal of the first charging chip is connected to the first step-down resistor R28, and the output terminal is connected to the first current-regulating resistor R20. Similarly, a second charging chip U5, a second step-down resistor R29, and a second current-regulating resistor R21 form a second charging module 12, wherein the input terminal of the second charging chip U5 is connected to the second step-down resistor R29, and the output terminal is connected to the second current-regulating resistor R21. The first charging module 11 and the second charging module 12 are independent of each other and can be flexibly combined and configured according to actual needs to meet the different requirements of charging multiple devices simultaneously, thereby improving the adaptability and versatility of the charging system. At the same time, the independent modules facilitate fault diagnosis and maintenance, allowing for quick location and replacement of faulty modules, reducing system downtime.

[0038] Furthermore, when the first charging module 11 and the second charging module 12 operate in parallel, they automatically adjust their respective output first and second currents through internal feedback circuits and control algorithms. Specifically, the input terminals of the first charging chip U3 and the second charging chip U5 are connected in parallel to the charging interface USB1, and their output terminals are also connected in parallel to the battery cell 21 of the atomizing device. In this way, the current provided by the charging interface USB1 can be shared by the first charging chip U3 and the second charging chip U5, with each chip undertaking a portion of the charging current, thereby improving the overall charging capacity.

[0039] Furthermore, the first charging chip U3 and the second charging chip U5 have communication capabilities, exchanging information such as their respective operating status and current and voltage parameters through a specific communication protocol. This enables more precise collaborative operation, optimizes the charging process, and improves charging efficiency and stability.

[0040] Specifically, in the charging control circuit, the first current-regulating resistor R20, the second current-regulating resistor R21, the first step-down resistor R28, and / or the second step-down resistor R29 serve as voltage divider resistors. The first charging module 11 and the second charging module 12 are connected to the same external power supply through the first step-down resistor R28 and / or the second step-down resistor R29. Both the first input pin and the second input pin are connected to the positive terminal of the power supply and ground. They are connected to the first port of the output port through the first current-regulating resistor R20 and the second current-regulating resistor R21. The input power is distributed through the first current-regulating resistor R20, the second current-regulating resistor R21, the first step-down resistor R28, and / or the second step-down resistor R29, controlling the output of the first output pin and the second output pin to output the first current and the second current. The overall current is output to the battery cell 21 through the shared circuit of the first port of the output port.

[0041] It should be noted that the first charging chip U3 and the second charging chip U5 are compatible with each other, including in terms of operating voltage, current, and communication protocol. The input voltage range of the first charging chip U3 and the second charging chip U5 matches the output voltage of the charging interface, and they can work in coordination through appropriate logic circuits, so that the charging function will not be affected by signal conflicts.

[0042] In this embodiment, the first charging module 11 and the second charging module 12 use current sharing control to ensure that their output impedances are as equal as possible. That is, the first charging chip U3 and the second charging chip U5 have current sharing functionality, enabling reasonable distribution of the charging current and providing precise current based on the battery or load requirements. This ensures that the first current and the second current are equal, avoiding problems such as prolonged charging time or reduced efficiency caused by uneven current distribution, and improving overall charging efficiency.

[0043] It should be noted that the first charging chip U3 and the second charging chip U5 exchange data through a communication interface, informing each other of their output current information and current operating status. Based on the information obtained through communication, the first charging chip U3 and the second charging chip U5 internally run current-sharing algorithms, adjusting their outputs according to the other's current to achieve current sharing. For example, when the first charging chip U3 detects that its output current is greater than that of the second charging chip U5, it can appropriately reduce its output voltage or duty cycle, and vice versa.

[0044] To ensure optimal current sharing between the first charging module 11 and the second charging module 12, and to minimize charging current errors between the two modules, the specifications of the first charging chip U3 and the second charging chip U5, the first step-down resistor R28 and the second step-down resistor R29, and the first current regulating resistor R20 and the second current regulating resistor R21 are identical. If the first charging chip U3 and the second charging chip U5 are rigorously selected and tested, ensuring high parameter consistency, output voltage deviations caused by individual chip differences can be reduced from the outset.

[0045] Furthermore, to reduce the error between the first current and the second current, this embodiment can rationally plan the PCB layout to make the parameters such as the line length and line width from the two charging chips to the load as consistent as possible, so as to reduce the impact of line impedance differences on the output voltage.

[0046] In other embodiments, the first charging module 11 or the second charging module 12 can be configured to manage regular charging, while the other charging module can be used to implement fast charging or special charging functions to improve charging efficiency or meet the charging requirements of different devices. In other words, the first charging chip and the second charging chip use uneven current control charging. The first charging chip U3 or the second charging chip U5 can be designed as the main charging chip, responsible for the main charging function, inputting the first current or the second current as the main charging current into the battery cell through the first port. For example, the first charging chip U3 and the second charging chip U5 can operate at different times. In the initial stage of charging, the first charging chip U3 uses a larger first current for fast charging; when the battery level reaches a certain point, it switches to the second charging chip U5 using a smaller second current for trickle charging to ensure the battery cell is fully charged without overcharging. Furthermore, the most suitable charging mode can be selected based on the battery cell's charging state to improve charging efficiency and battery life.

[0047] In one embodiment, the charging control circuit further includes a protection circuit, which includes a fuse resistor F1. One end of the fuse resistor F1 is electrically connected to a power supply pin, and the other end is electrically connected to a first input pin and a second input pin of the first charging chip U3.

[0048] When the first current, the second current, or the overall current of the charging control circuit is too large or the duration is too long, the fuse resistor F1 will melt due to the heat generated by its own resistance exceeding its heat dissipation capacity, thereby cutting off the charging control circuit.

[0049] In one embodiment, such as Figure 2 As shown, the protection circuit also includes a lithium battery protection chip U4 for detecting the status of the battery cell. Specifically, the output port includes a first port and a second port, and the first output pin and the second output pin are configured to be electrically connected to the first port. The input terminal of the lithium battery protection chip U4 is electrically connected to the first port of the output port, and the output terminal of the lithium battery protection chip U4 is electrically connected to the second port.

[0050] In this embodiment, the charging control circuit further includes a first capacitor C13, a second capacitor C9, and a third capacitor C10. The first capacitor C13 is used to filter the current. One end of the first capacitor C13 is electrically connected to the input terminal of the lithium battery protection chip, and the other end is electrically connected to the output terminal of the lithium battery protection chip. During charging or discharging, the power supply voltage may experience high-frequency fluctuations (ripple). The first capacitor C13 absorbs these fluctuations through its "charge and discharge" characteristics, providing a stable DC voltage to the lithium battery protection chip.

[0051] Similarly, the second capacitor C9 is also used to filter the current. One end of the second capacitor C9 is electrically connected to the first port, and the other end is configured to be grounded. When the battery cell is powered, the power supply voltage may fluctuate (ripple) due to load changes (such as transient current requirements of the chip) or the operation of other components in the circuit (such as switching transistors). The second capacitor C9 absorbs these fluctuations through its "charge and discharge" characteristics, making the voltage smoother.

[0052] In other embodiments, the first capacitor C13 and the second capacitor C9 can be filtered by means of LC filter network (inductor + capacitor), RC filter circuit (resistor + capacitor) to ensure stable circuit operation.

[0053] The third capacitor C10 is used to regulate the input current. One end of the third capacitor C10 is electrically connected to the input terminal of the first step-down resistor R28 and / or the second step-down resistor R29, and the other end is configured to be grounded. The voltage at the power input terminal may experience ripple (voltage fluctuation) due to power grid fluctuations, switching power supply operation, etc. The third capacitor C10 absorbs these fluctuations through its "charge and discharge" characteristics, making the output voltage more stable.

[0054] like Figure 3 As shown, one embodiment of this application also provides an atomizing device 200, including a battery cell 21 and a PCB board 22, and a charging control circuit disposed on the PCB board 22, wherein the charging control circuit can be the charging control circuit of any of the above embodiments.

[0055] In one embodiment, the charging control circuit includes two charging chips: a first charging chip 221 and a second charging chip 222. Both the first charging chip 221 and the second charging chip 222 are electrically connected to the charging interface, and their output pins are electrically connected to the output port. This application uses the first charging chip 221 to convert the external input current into a first current, and the second charging chip 222 to convert the external current into a second current. The first and second currents are then input into the battery cell through the output port. By coordinating the control of the first charging chip 221 and the second charging chip 222 to convert the external input current and control the first and second currents to be input into the battery cell through the output port, the overall current input to the battery cell by the charging circuit is controlled.

[0056] It should be noted that the charging current of the atomizing device needs to reach over 900mA to shorten the charging time. However, the chips that meet the design requirements are relatively large, with a typical chip area of ​​6.2mm x 5.0mm. In this embodiment, the first charging chip 221 and the second charging chip 222 are smaller in size. If an SOT23-5 chip is used, its size is 3.0mm x 2.9mm. The heat conduction path from the inside of the chip to the outside is short, allowing for faster heat dissipation and preventing heat accumulation. The two small charging chips disperse the heat, and compared to a large packaged chip, the heat dissipation burden on each chip is smaller, which helps improve chip efficiency and lifespan, and reduces the risk of failure due to overheating.

[0057] Furthermore, the rated current of the first charging chip 221 and the second charging chip 222 reaches 600mA, that is, the first current and the second current each reach 600mA. By directly connecting the first charging chip 221 and the second charging chip 222 in parallel, the first output pin and the second output pin are connected in parallel to the output port, and the rated current of the output port can reach 1200mA, thereby increasing the charging current input to the battery cell and shortening the charging time.

[0058] In some embodiments, the first charging chip 221 and the second charging chip 222 are connected in parallel in the charging control circuit. Each chip outputs only 450mA of current. The chip output current is relatively small, with a large rated margin, which reduces its own heat generation and enables it to operate stably within the set current range. The parallel connection of the first charging chip 221 and the second charging chip 222 reduces the chip's own heat generation, ensuring stable chip operation. At the same time, it helps to optimize the PCB layout, disperse heat generation, and avoid heat source concentration, thus reducing the safety risks to the battery cell.

[0059] Furthermore, the wafers in the first charging chip 221 and the second charging chip 222 are allowed to operate at temperatures ranging from -40°C to 125°C, which can adapt to the high-temperature environment caused by charging heat. This ensures the consistency and stability of the electrical performance of the first charging chip 221 and the second charging chip 222, reduces signal delay and distortion caused by temperature changes, and ensures that the first charging chip 221 and the second charging chip 222 can process data accurately and quickly at various temperatures.

[0060] To reduce heat generation during charging, the first charging chip 221 and the second charging chip 222 are positioned close to the heat dissipation channel in the PCB board 22 so that the heat generated by the first charging chip 221 and the second charging chip 222 can be dissipated through the heat dissipation channel.

[0061] Furthermore, the PCB board has copper plating on both sides at the positions corresponding to the connection pins of the first charging chip 221 and the second charging chip 222. The copper plating area is larger than the copper plating area of ​​the corresponding connection pins of the lithium battery protection chip. In addition, the copper plate on the back of the via is added to disperse heat and achieve heat dissipation, so as to avoid local overheating of the PCB and conduction to the battery cell.

[0062] 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 charging control circuit applied to a battery cell of an atomization device, characterized in that, include: A charging interface is provided for receiving external current; the charging interface is equipped with power pins. The first charging chip has a first input pin and a first output pin, which are used to transform the external current to output a first current; The second charging chip has a second input pin and a second output pin, which are used to transform the external current to output a second current; The output port is configured to be electrically connected to the first output pin and the second output pin for current input to the battery cell; The first input pin and the second input pin are configured to be electrically connected to the power supply pin.

2. The charge control circuit according to claim 1, characterized by include: The first step-down resistor has one end electrically connected to the power supply pin and the other end electrically connected to the first input pin. And / or, a second step-down resistor, one end of which is electrically connected to the power supply pin and the other end of which is electrically connected to the second input pin.

3. The charge control circuit according to claim 1, characterized by include: A fusible resistor, one end of which is electrically connected to the power supply pin, and the other end of which is electrically connected to the first input pin and the second input pin.

4. The charging control circuit according to claim 2, characterized in that, The output port includes a first port and a second port, and the first output pin and the second output pin are configured to be electrically connected to the first port. The charging control circuit further includes a lithium battery protection chip for detecting the state of the battery cell; the input terminal of the lithium battery protection chip is electrically connected to the first port, and the output terminal of the lithium battery protection chip is electrically connected to the second port.

5. The charging control circuit according to claim 4, characterized in that, include: The first capacitor is used to filter the current. One end of the first capacitor is electrically connected to the input terminal of the lithium battery protection chip, and the other end is electrically connected to the output terminal of the lithium battery protection chip.

6. The charging control circuit according to claim 5, characterized in that, include: The second capacitor is used to filter the current. One end of the second capacitor is electrically connected to the first port, and the other end is configured to be grounded.

7. The charging control circuit according to claim 6, characterized in that, include: The third capacitor is used to regulate the input current. One end of the third capacitor is electrically connected to the input terminal of the first step-down resistor and / or the second step-down resistor, and the other end is configured to be grounded.

8. The charging control circuit according to claim 1, characterized in that, The first charging chip has a first current regulating pin, and the charging control circuit includes: The first current-adjusting resistor is used to configure the parameters of the first current; One end of the first current-regulating resistor is electrically connected to the first current-regulating pin, and the other end is configured to be grounded.

9. The charging control circuit according to claim 8, characterized in that, The second charging chip has a second current adjustment pin, and the charging control circuit includes: The second current-adjusting resistor is used to configure the parameters of the second current; One end of the second current-regulating resistor is electrically connected to the second current-regulating pin, and the other end is configured to be grounded.

10. An atomizing device, characterized in that, include: The battery cell and the charging control circuit according to any one of claims 1 to 9.

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