A charging current regulation circuit for an electronic cigarette

Abstract

The utility model provides a kind of charging current regulating circuit for electronic cigarette, including power supply and charging circuit, the output of power supply is connected with the main control circuit board power supply of electronic cigarette, the output of charging circuit is connected with the charging of power supply, the input of charging circuit is connected with 5V constant voltage source, the input of charging circuit is also electrically connected with the main control circuit board of electronic cigarette, charging management chip U1 is equipped in charging circuit, charging management chip U1 can receive the charging current regulation control signal of the main control circuit board of electronic cigarette, charging circuit can be according to the control instruction of the main control circuit board of electronic cigarette Adjusting reduce the charging current of power supply.The utility model has the beneficial effect that: it can be realized when the battery charging capacity of electronic cigarette exceeds certain degree, automatically adjust and reduce the charging current to battery.

Description

Technical Field

[0001] This utility model relates to the field of protection circuit technology, specifically to a charging current regulation circuit for electronic cigarettes. Background Technology

[0002] Electronic cigarettes are electronic products that mimic traditional cigarettes, possessing the same appearance, smoke, taste, and feel, and even offering a wider variety of flavors than regular cigarettes. They work by atomizing nicotine and other substances into vapor for users to inhale. Generally, electronic cigarettes consist of three main parts: a cartridge containing the nicotine solution, an vaporizer, and a battery. The atomizer, powered by the battery, transforms the liquid nicotine in the cartridge into vapor, giving the user a similar sensation to smoking, allowing them to "exhale clouds of smoke."

[0003] Currently, most e-cigarettes on the market consist of a cartridge and the main body. The cartridge typically comprises a non-removable e-liquid tank and an atomizer. The e-liquid in the tank is atomized by the atomizer for the user to inhale. There are currently two main atomization methods: one is heat atomization, which uses a heating coil and a heating mesh to heat and atomize the e-liquid in the tank for inhalation; the other is ultrasonic atomization, where the e-liquid is ultrasonically atomized by the cartridge. Regardless of the atomization method, the atomizer in the cartridge needs to be powered, and the main body of the e-cigarette must contain a main control circuit board and a power supply.

[0004] In current technology, e-cigarettes generally use rechargeable batteries as their power source, requiring recharging after each use. However, existing e-cigarettes use a fixed charging power, which remains constant until the battery is fully charged. Due to the inherent characteristics of the battery, continuing to charge at a constant high power after the battery has exceeded 80% charge can cause it to overheat, posing a safety hazard of bulging or even explosion, resulting in a poor user experience. Although existing charging ICs with internal registers can change the charging current by writing different values ​​to the IC's internal register, these ICs are expensive and not competitive in the e-cigarette market. Utility Model Content

[0005] To address the problems in the prior art, this utility model provides a charging current regulation circuit for electronic cigarettes. By setting up a power supply and charging circuit that cooperate with each other in the charging current regulation circuit for electronic cigarettes, it is possible to automatically adjust and reduce the charging current supplied to the battery when the battery charge of the electronic cigarette exceeds a certain level. This significantly improves the protection capability of the electronic cigarette battery and solves the problem in the prior art where the constant charging power during electronic cigarette charging causes the battery to easily overheat, posing a safety hazard.

[0006] This utility model provides a charging current regulation circuit for electronic cigarettes, including a power supply and a charging circuit. The output terminal of the power supply is connected to the main control circuit board of the electronic cigarette for power supply, and the output terminal of the charging circuit is connected to the power supply for charging. The input terminal of the charging circuit is connected to a 5V constant voltage source and is also electrically connected to the main control circuit board of the electronic cigarette. The charging circuit is equipped with a charging management chip U1, which can receive the charging current regulation control signal from the main control circuit board of the electronic cigarette. The charging circuit can adjust and reduce the charging current to the power supply according to the control command of the main control circuit board of the electronic cigarette.

[0007] This utility model is further improved by including a current regulating resistor R1, a resistor R7, a resistor R2, and a capacitor C2 in the charging circuit. The charging management chip U1 has 8 pins. The 8th pin of the charging management chip U1 is connected to a 5V constant voltage source. The 8th pin of the charging management chip U1 is also connected to one end of the resistor R2. The other end of the resistor R2 is connected to one end of the capacitor C2. The 6th pin of the charging management chip U1 is connected to one end of the current regulating resistor R1 and one end of the resistor R7. The other end of the current regulating resistor R1 is electrically connected to the main control circuit board of the electronic cigarette and can receive the charging current regulation control signal from the main control circuit board of the electronic cigarette. The 1st pin of the charging management chip U1 is connected to the power supply for charging. The 5th pin of the charging management chip U1, the other end of the capacitor C2, and the other end of the resistor R7 are grounded.

[0008] In a further improvement to this invention, a capacitor C1 is also provided in the charging circuit. The first pin of the charging management chip U1 is connected to one end of the capacitor C1 and the power supply for charging, and the other end of the capacitor C1 is grounded.

[0009] In a further improvement to this invention, a resistor R3 is provided in the charging circuit, and the fourth pin of the charging management chip U1 is connected to one end of the resistor R3, while the other end of the resistor R3 is grounded.

[0010] This utility model is further improved, and the charging management chip U1 is model number LP4073.

[0011] In a further improvement to this invention, the power supply is a rechargeable lithium battery.

[0012] Compared with the prior art, the beneficial effects of this utility model are: it provides a charging current regulation circuit for electronic cigarettes. By setting up a power supply and a charging circuit that cooperate with each other in the charging current regulation circuit for electronic cigarettes, the charging circuit can adjust and reduce the charging current to the power supply according to the control instructions of the main control circuit board of the electronic cigarette. It can automatically adjust and reduce the charging current to the battery when the battery charge of the electronic cigarette exceeds a certain level, which significantly improves the protection capability of the electronic cigarette battery, extends the service life of the electronic cigarette battery, improves the charging safety of the electronic cigarette, and has low cost. It also solves the problem in the prior art that the constant charging power during electronic cigarette charging causes the battery to easily overheat and poses a safety hazard. Attached Figure Description

[0013] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a circuit diagram of a charging current adjustment circuit for electronic cigarettes according to the present invention. Detailed Implementation

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0016] 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 the present invention. 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.

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0018] like Figure 1 As shown, this utility model provides a charging current regulation circuit for electronic cigarettes, including a power supply and a charging circuit. The output terminal of the power supply is connected to the main control circuit board of the electronic cigarette for power supply, and the output terminal of the charging circuit is connected to the power supply for charging. The input terminal of the charging circuit is connected to a 5V constant voltage source and is also electrically connected to the main control circuit board of the electronic cigarette. The charging circuit is equipped with a charging management chip U1, which is model LP4073. The charging management chip U1 can receive the charging current regulation control signal from the main control circuit board of the electronic cigarette. The power supply is a rechargeable lithium battery. The charging circuit also includes current regulating resistors R1, R7, and R2, and capacitor C2. The charging management chip U1 has eight pins. Pin 8 of the charging management chip U1 is connected to a 5V constant voltage source. Pin 8 of the charging management chip U1 is also connected to one end of resistor R2. The other end of resistor R2 is connected to one end of capacitor C2. Pin 6 of the charging management chip U1 is connected to one end of current regulating resistor R1 and one end of resistor R7. The other end of current regulating resistor R1 is electrically connected to the main control circuit board of the electronic cigarette and can receive charging current regulation control signals from the main control circuit board. Pin 1 of the charging management chip U1 is connected to the power supply for charging. Pin 5 of the charging management chip U1, the other end of capacitor C2, and the other end of resistor R7 are grounded. The charging circuit also includes capacitor C1. Pin 1 of the charging management chip U1 is connected to one end of capacitor C1 and the power supply for charging, while the other end of capacitor C1 is grounded. The charging circuit also includes resistor R3. Pin 4 of the charging management chip U1 is connected to one end of resistor R3, while the other end of resistor R3 is grounded. In this embodiment, the charging circuit can adjust and reduce the charging current to the power supply according to the control instructions of the main control circuit board of the electronic cigarette. When the electronic cigarette is charging normally, the control signal Iset of the main control circuit board of the electronic cigarette to the other end of the current regulating resistor R1 is set to the input state. At this time, the charging current is the charging current set by the resistor R7. When the battery power of the electronic cigarette exceeds the set threshold, which is set to 80% in this embodiment, the control signal Iset of the main control circuit board of the electronic cigarette to the other end of the current regulating resistor R1 is set to the output state. At this time, the charging current is the charging current of the resistor R7 and the current regulating resistor R1, that is, the charging current is reduced. It can realize the automatic adjustment and reduction of the charging current to the battery when the battery power of the electronic cigarette exceeds a certain level, which significantly improves the protection capability of the electronic cigarette battery, extends the service life of the electronic cigarette battery, and improves the charging safety of the electronic cigarette.

[0019] As can be seen from the above, this utility model provides a charging current regulation circuit for electronic cigarettes. By setting up a power supply and a charging circuit that cooperate with each other in the charging current regulation circuit for electronic cigarettes, the charging circuit can adjust and reduce the charging current to the power supply according to the control instructions of the main control circuit board of the electronic cigarette. It can automatically adjust and reduce the charging current to the battery when the battery charge of the electronic cigarette exceeds a certain level, which significantly improves the protection capability of the electronic cigarette battery, extends the battery life of the electronic cigarette battery, improves the charging safety of the electronic cigarette, and has low cost. It solves the problem in the prior art that the constant charging power during electronic cigarette charging causes the battery to easily overheat and poses a safety hazard.

[0020] The specific embodiments described above are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. A charging current regulation circuit for electronic cigarettes, characterized in that: The device includes a power supply and a charging circuit. The output of the power supply is connected to the main control circuit board of the electronic cigarette, and the output of the charging circuit is connected to the power supply for charging. The input of the charging circuit is connected to a 5V constant voltage source and is also electrically connected to the main control circuit board of the electronic cigarette. The charging circuit contains a charging management chip U1, which can receive charging current adjustment control signals from the main control circuit board of the electronic cigarette. The charging circuit can adjust and reduce the charging current to the power supply according to the control instructions of the main control circuit board of the electronic cigarette.

2. The charging current regulation circuit for electronic cigarettes according to claim 1, characterized in that: The charging circuit also includes a current regulating resistor R1, a resistor R7, a resistor R2, and a capacitor C2. The charging management chip U1 has 8 pins. The 8th pin of the charging management chip U1 is connected to a 5V constant voltage source. The 8th pin of the charging management chip U1 is also connected to one end of the resistor R2. The other end of the resistor R2 is connected to one end of the capacitor C2. The 6th pin of the charging management chip U1 is connected to one end of the current regulating resistor R1 and one end of the resistor R7. The other end of the current regulating resistor R1 is electrically connected to the main control circuit board of the electronic cigarette and can receive the charging current regulation control signal from the main control circuit board of the electronic cigarette. The 1st pin of the charging management chip U1 is connected to the power supply for charging. The 5th pin of the charging management chip U1, the other end of the capacitor C2, and the other end of the resistor R7 are grounded.

3. The charging current regulation circuit for electronic cigarettes according to claim 2, characterized in that: The charging circuit also includes a capacitor C1. The first pin of the charging management chip U1 is connected to one end of the capacitor C1 and the power supply for charging, and the other end of the capacitor C1 is grounded.

4. The charging current regulating circuit for electronic cigarettes according to claim 3, characterized in that: The charging circuit also includes a resistor R3. The fourth pin of the charging management chip U1 is connected to one end of the resistor R3, and the other end of the resistor R3 is grounded.

5. The charging current regulation circuit for electronic cigarettes according to claim 4, characterized in that: The charging management chip U1 is model LP4073.

6. The charging current regulating circuit for electronic cigarettes according to claim 5, characterized in that: The power supply is a rechargeable lithium battery.

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