CN110854941B - Split type low temperature smoking set charging detection control circuit - Google Patents
Split type low temperature smoking set charging detection control circuit Download PDFInfo
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- CN110854941B CN110854941B CN201810953493.9A CN201810953493A CN110854941B CN 110854941 B CN110854941 B CN 110854941B CN 201810953493 A CN201810953493 A CN 201810953493A CN 110854941 B CN110854941 B CN 110854941B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a split type low-temperature smoking set charging detection control circuit, which comprises a tobacco rod control circuit and a cigarette case control circuit; the cigarette rod control circuit is provided with a cigarette rod sensing unit, a cigarette rod triggering unit and a cigarette rod charging control unit, and the cigarette rod triggering unit is arranged on the cigarette case; the cigarette case control circuit is provided with a cigarette case induction unit, a cigarette case trigger unit, a cigarette case voltage boosting circuit unit, a cigarette case power supply switch and temperature measurement, and the cigarette case trigger unit is arranged on the cigarette rod. The induction unit on the cigarette rod and the trigger unit on the cigarette case and the induction unit on the cigarette case and the trigger unit on the cigarette rod are contacted or separated simultaneously, each simultaneously generates an access signal or a departure signal, the cigarette rod control circuit and the cigarette case control circuit are opened or closed simultaneously, so that charging is started or stopped, the existing setting of detecting pins is replaced, the setting quantity of connecting pins between the cigarette rod and the cigarette case is reduced, the good contact probability of the cigarette rod and the cigarette case is improved, and the realization of the charging function is ensured.
Description
Technical Field
The invention relates to the field of electronic cigarettes, in particular to a split type low-temperature smoking set charging detection control circuit.
Background
The split low-temperature smoking set consists of a tobacco rod and a cigarette case, and an energy supply box, namely the cigarette case, is generally matched because the tobacco rod is thin and the battery capacity is small and electric energy is required to be supplied.
When the cigarette case charges the cigarette rod, generally, the cigarette rod and the cigarette case are respectively provided with at least 4 connecting pins, wherein 2 are used for charging, and the other 2 are used for signal detection. If 2 signal detection pins are set, and 2 charging pins are added, the connection pins are too many (at least 4), when the cigarette rod and the cigarette case are smoked, the probability that all the connection pins are in good contact is very low, the realization of the charging function is influenced, and the cigarette case circuit is always in a circulating state of ' detecting the contact of the cigarette rod Pin and the cigarette rod-awakening the cigarette case circuit-detecting whether the cigarette rod is full of ' sleeping the cigarette case circuit-detecting the cigarette rod Pin ', the energy is wasted, and the stability of the cigarette case circuit is reduced.
If not set up signal detection Pin, though reduced the quantity of connecting Pin, can guarantee to charge that the Pin contact well realizes the tobacco rod function of charging, but tobacco rod and cigarette case can't detect mutual actuation and separately through signal detection Pin, can't carry out the tobacco rod and charge and detect the control: when to start charging, when to finish charging, when to switch the MCUs of the cigarette case and cigarette rod to a sleep mode, etc., which not only wastes energy, but also reduces the stability of the cigarette rod circuit and cigarette case circuit.
Disclosure of Invention
The invention provides a split type low-temperature smoking set charging detection control circuit.A cigarette rod triggering unit is arranged on a cigarette case and is used for triggering a cigarette rod sensing unit arranged on a cigarette rod; set up cigarette case trigger unit on the tobacco rod for trigger the cigarette case induction element on the cigarette case: the cigarette case and the cigarette rod are triggered and sensed mutually to detect mutual attraction and separation, so that the charging detection and control of the smoking set are realized.
Specifically, the technical solution for achieving the above technical object of the present invention is as follows:
a split type low-temperature smoking set charging detection control circuit comprises a tobacco rod control circuit and a cigarette case control circuit;
the tobacco rod control circuit comprises: the cigarette rod charging control device comprises a cigarette rod master control unit, a cigarette rod sensing unit, a cigarette rod charging control unit, a cigarette rod battery and a cigarette rod triggering unit; the tobacco rod sensing unit and the tobacco rod charging control unit are both connected with the tobacco rod master control unit, the tobacco rod charging control unit is also connected with a tobacco rod battery and a tobacco rod charging interface, and the tobacco rod battery also provides power for the tobacco rod master control unit and the tobacco rod sensing unit;
the cigarette case control circuit includes: the cigarette case comprises a cigarette case master control unit, a cigarette case induction unit, a cigarette case booster circuit unit, a cigarette case power supply switch and temperature measurement unit, a cigarette case battery and a cigarette case trigger unit; the cigarette case voltage boosting circuit unit, the cigarette case induction unit, the cigarette case power supply switch and the temperature measurement unit are all connected with the cigarette case master control unit, the cigarette case voltage boosting circuit unit is connected with a cigarette case battery and the anode Vout + of the cigarette case power supply interface, the cigarette case power supply switch is connected with the temperature measurement unit and the cathode Vout-of the cigarette case power supply interface, and the cigarette case battery also provides power for the cigarette case master control unit and the cigarette case induction unit;
the cigarette rod triggering unit is arranged on the cigarette case and used for triggering the cigarette rod sensing unit;
the cigarette case triggering unit is arranged on the cigarette rod and used for triggering the cigarette case induction unit.
When the cigarette rod is smoked with the cigarette case, the cigarette rod sensing unit senses the approach of the cigarette rod triggering unit to generate a cigarette case access signal, and meanwhile, the cigarette case sensing unit senses the approach of the cigarette case triggering unit to generate a cigarette rod access signal; the cigarette rod master control unit receives and controls the charging function of the cigarette rod charging control unit to be opened according to the cigarette case access signal, meanwhile, the cigarette case master control unit receives and controls the boosting function of the cigarette case boosting circuit unit and the opening of the cigarette case power supply switch and temperature measurement according to the cigarette rod access signal, and the cigarette rod is connected with the cigarette rod charging interface to the cigarette case power supply interface when being sucked with the cigarette case, so that the cigarette rod control circuit and the cigarette case control circuit form a cigarette rod charging loop, and the cigarette case battery charges for a cigarette rod battery.
When the cigarette rod is separated from the cigarette case, the cigarette rod sensing unit senses the separation of the cigarette rod triggering unit to generate a cigarette case separation signal, and meanwhile, the cigarette case sensing unit senses the separation of the cigarette case triggering unit to generate a cigarette rod separation signal; the cigarette rod master control unit receives and closes according to the charging function of the cigarette rod charging control unit of the cigarette case leaving signal control, and meanwhile, the cigarette case master control unit receives and closes according to the boosting function of the cigarette case boosting circuit unit and the closing of the cigarette case power supply switch and temperature measurement of the cigarette case leaving signal control, so that the cigarette rod charging circuit formed by the cigarette rod control circuit and the cigarette case control circuit is disconnected, and the cigarette case battery stops charging for the cigarette rod battery.
When the induction unit on the cigarette rod interacts with the trigger unit on the cigarette case, the induction unit on the cigarette case interacts with the trigger unit on the cigarette rod, and the induction unit on the cigarette case and the trigger unit on the cigarette rod respectively simultaneously generate an access signal or a departure signal, so that the existing arrangement for detecting pins is replaced, the number of the connected pins is reduced, the good contact probability of the cigarette rod and the cigarette case is improved, and the realization of the charging function is ensured.
After the cigarette rod is disconnected with the cigarette case, the boosting function of the cigarette case boosting circuit and the power supply switch of the cigarette case are both closed to measure the temperature, and at the moment, the power supply interface of the cigarette case is uncharged, so that potential safety hazards cannot exist even if two connection pins are in short circuit.
Further, the cigarette rod control circuit further comprises a cigarette rod overcurrent protection unit, and the cigarette rod overcurrent protection unit is connected with the cigarette case battery.
Cigarette rod overcurrent protection unit: when the current of the tobacco rod battery is larger than a certain value, a loop where the battery is located is cut off, and overcurrent protection is realized.
Further, the tobacco rod control circuit further comprises a tobacco rod voltage stabilizing unit, and the tobacco rod battery, the tobacco rod master control unit and the tobacco rod sensing unit are all connected with the tobacco rod voltage stabilizing unit.
Cigarette rod steady voltage unit: the tobacco rod battery voltage fluctuates, especially after loading, which is more pronounced. After the voltage of the tobacco rod battery passes through the voltage stabilizing unit, high-precision stable voltage is output, and a stable power supply is provided for the tobacco rod master control unit and the tobacco rod sensing unit.
Further, the tobacco rod control circuit further comprises a tobacco rod indicating unit, and the tobacco rod indicating unit is connected with the tobacco rod master control unit.
The cigarette rod indicating unit displays the charging and discharging states.
Further, the cigarette case control circuit further comprises a cigarette case overcurrent protection unit, and the cigarette case overcurrent protection unit is connected with a cigarette case battery.
And the cigarette case overcurrent protection unit is used for cutting off a loop where the cigarette case battery is located when the current of the cigarette case battery is greater than a certain value, so that overcurrent protection is realized.
Further, the tobacco rod charging control unit comprises a charging chip U5, a MOS transistor Q1, a resistor R1, a resistor R2, a resistor R18, a resistor R19, an inductor L5 and a capacitor C5;
an enabling end TS of the charging chip U5 is connected in series to the positive electrode CH + of the smoke rod charging interface through a resistor R18 and is connected with the drain end of the MOS transistor Q1; the source electrode of the MOS tube Q1 is grounded; the control end of the MOS tube Q1 is connected with the smoke rod master control unit and is grounded through a resistor R19;
the power supply terminal VCC of the charging chip U5 is connected with the positive electrode CH + of the tobacco rod charging interface, the charging current setting terminal PROG of the charging chip U5 is grounded through a resistor R1, the charging completion indication terminal NSTDBY and the charging state indication terminal NCHRG of the charging chip U5 are both connected with the tobacco rod master control unit, the switch terminal LX of the charging chip U5 is connected in series with the positive electrode of the tobacco rod battery through an inductor L5, the end of the inductor L5 connected with the positive electrode of the tobacco rod battery is also connected in series with the ground through a capacitor C6, the grounding terminal GND of the charging chip U5 is grounded, and the battery voltage detection terminal BAT of the charging chip U5 is connected in series with the positive electrode of the tobacco rod battery through a resistor R2.
Further, the cigarette case boost circuit comprises a boost chip U4 and a resistor R15, the output end of the cigarette case battery is connected with the power input end VIN of the boost chip U4, the positive pole Vout + of the cigarette case power supply interface is connected with the boost conversion output end VOUT of the boost chip U4, and the enable end EN of the boost chip U4 is connected with the cigarette case master control unit through a series resistor R15.
Further, the cigarette case power supply switch and temperature measurement unit comprises a power supply switch chip U2, a resistor R24, a resistor R8, a resistor R5, a resistor R22 and a capacitor C4, wherein the model of the power supply switch chip U2 is Q/AP 6982; the grid terminal G of the power supply switch chip U2 is connected with the cigarette case master control unit through a series resistor R24 and is grounded through a resistor R5; the source terminal S of the power supply switch chip U2 is connected with the cigarette case master control unit through a series resistor R8 and is grounded through a resistor R22; the connection point of the resistor R8 and the cigarette case master control unit is also grounded through a capacitor C4; the drain end D of the power supply switch chip U2 is connected with the negative pole Vout-of the cigarette case power supply interface.
Further, the cigarette rod sensing unit is a hall switch, and the cigarette rod triggering unit is a magnet which is arranged on the cigarette case and corresponds to the cigarette rod sensing unit; the cigarette case induction unit is a Hall switch, and the cigarette case trigger unit is a magnet which is arranged on the cigarette rod and corresponds to the cigarette case induction unit.
Advantageous effects
The invention provides a split type low-temperature smoking set charging detection control circuit, when a cigarette rod is smoked by a cigarette case, a cigarette rod sensing unit senses the approach of a cigarette rod triggering unit to generate a cigarette case access signal, and simultaneously, a cigarette case sensing unit senses the approach of a cigarette case triggering unit to generate a cigarette rod access signal; the cigarette rod master control unit receives and controls the charging function of the cigarette rod charging control unit to be opened according to the cigarette case access signal, and meanwhile, the cigarette case master control unit receives and controls the boosting function of the cigarette case boosting circuit unit and the opening of the cigarette case power supply switch and the temperature measuring unit according to the cigarette rod access signal, so that the cigarette rod control circuit and the cigarette case control circuit form a cigarette rod charging loop, and the cigarette case battery charges the cigarette rod battery. When the cigarette rod is separated from the cigarette case, the cigarette rod sensing unit senses the separation of the cigarette rod triggering unit to generate a cigarette case separation signal, and meanwhile, the cigarette case sensing unit senses the separation of the cigarette case triggering unit to generate a cigarette rod separation signal; the cigarette rod master control unit receives and controls the charging function of the cigarette rod charging control unit to be closed according to the cigarette case leaving signal, and meanwhile, the cigarette case master control unit receives and controls the boosting function of the cigarette case boosting circuit unit and the closing of the cigarette case power supply switch and the temperature measuring unit according to the cigarette rod leaving signal, so that the cigarette rod charging circuit formed by the cigarette rod control circuit and the cigarette case control circuit is disconnected, and the cigarette case battery stops charging the cigarette rod battery.
Therefore, compared with the prior art, the invention has the following beneficial effects: when through the interact between the induction element on the tobacco rod and the trigger element on the cigarette case, the interaction between the induction element on the cigarette case and the trigger element on the tobacco rod all produces the access signal or leaves the signal respectively simultaneously, replaces the setting of current detection Pin to reduce the quantity of setting of being connected Pin between tobacco rod and the cigarette case, improve the good probability of tobacco rod and cigarette case contact, guarantee the realization of the function of charging. Moreover, after the cigarette rod is disconnected from the cigarette case, the boosting function of the cigarette case boosting circuit, the cigarette case power supply switch and the temperature measuring unit are both closed, and the cigarette case power supply interface is not electrified, so that potential safety hazards cannot exist even if two connecting pins are in short circuit. In addition, when the boosting function of the cigarette case boosting circuit, the cigarette case power supply switch and the temperature measuring unit are all closed, the cigarette rod and the cigarette case enter a sleep state, energy is saved, and meanwhile, the stability of the cigarette rod control circuit and the stability of the cigarette case control circuit are also improved.
Drawings
FIG. 1 is a block diagram of a tobacco rod control circuit of the present invention;
fig. 2 is a block diagram of the cigarette pack control circuit of the present invention;
FIG. 3 is a circuit diagram of the tobacco rod master control unit of the present invention;
FIG. 4 is a circuit diagram of the tobacco rod sensing unit of the present invention;
FIG. 5 is a circuit diagram of the tobacco rod charging control unit and the tobacco rod overcurrent protection unit of the present invention;
FIG. 6 is a circuit diagram of the tobacco rod voltage stabilizing unit of the present invention;
FIG. 7 is a circuit diagram of a heating body and a temperature detecting unit according to the present invention;
FIG. 8 is a circuit diagram of the cigarette rod indicating unit of the present invention;
figure 9 is a circuit diagram of the cigarette pack master control unit of the present invention;
FIG. 10 is a circuit diagram of the cigarette pack booster circuit unit of the present invention;
FIG. 11 is a circuit diagram of the cigarette pack power switch and temperature measurement of the present invention;
fig. 12 is a circuit diagram of the cigarette pack sensing unit of the present invention;
fig. 13 is a circuit diagram of a cigarette case overcurrent protection unit of the invention;
fig. 14 is a circuit diagram of a cigarette pack indicating unit of the present invention;
fig. 15 is a circuit diagram of the cigarette pack charging unit of the present invention.
Reference numerals: 11-rod master control unit, 12-rod sensing unit, 13-rod charging control unit, 14-rod battery, 15-rod charging interface, 16-rod overcurrent protection unit, 17-rod voltage stabilization unit, 18-rod indication unit, 19-heating body and temperature detection unit, 21-cigarette case master control unit, 22-cigarette case battery, 23-cigarette case voltage boosting circuit unit, 24-cigarette case sensing unit, 25-cigarette case power supply switch and temperature measurement, 26-cigarette case power supply interface, 27-cigarette case overcurrent protection unit, 28-cigarette case indication unit, 29-cigarette case charging unit.
Detailed Description
The invention provides a split type low-temperature smoking set charging detection control circuit which comprises a tobacco rod control circuit and a cigarette case control circuit.
As shown in fig. 1, the tobacco rod control circuit comprises: the cigarette rod charging control device comprises a cigarette rod master control unit 11, a cigarette rod sensing unit 12, a cigarette rod charging control unit 13, a cigarette rod battery 14 and a cigarette rod triggering unit; the tobacco stem sensing unit 12 and the tobacco stem charging control unit 13 are both connected with the tobacco stem master control unit 11, the tobacco stem charging control unit 13 is also connected with a tobacco stem battery 14 and a tobacco stem charging interface 15, and the tobacco stem battery 14 also provides power for the tobacco stem master control unit 11 and the tobacco stem sensing unit 12; the cigarette rod triggering unit is arranged on the cigarette case and used for triggering the cigarette rod sensing unit 12;
as shown in fig. 2, the pack control circuit includes: the cigarette case comprises a cigarette case master control unit 21, a cigarette case induction unit 24, a cigarette case booster circuit unit 23, a cigarette case power supply switch and temperature measurement unit 25, a cigarette case battery 22 and a cigarette case trigger unit; the cigarette case voltage boosting circuit unit 23, the cigarette case induction unit 24, the cigarette case power supply switch and the temperature measurement unit 25 are all connected with the cigarette case master control unit 21, the cigarette case voltage boosting circuit unit 23 is connected with the cigarette case battery 22 and the positive electrode Vout + of the cigarette case power supply interface 26, the cigarette case power supply switch is connected with the temperature measurement unit 25 and the negative electrode Vout-of the cigarette case power supply interface 26, and the cigarette case battery 22 also provides power for the cigarette case master control unit 21 and the cigarette case induction unit 24; the cigarette case triggering unit is arranged on the cigarette rod and used for triggering the cigarette case induction unit 24.
When the cigarette rod is smoked with the cigarette case, the cigarette rod sensing unit 12 senses the approach of the cigarette rod triggering unit to generate a cigarette case access signal, and meanwhile, the cigarette case sensing unit 24 senses the approach of the cigarette case triggering unit to generate a cigarette rod access signal. The cigarette rod master control unit 11 receives and controls the charging function of the cigarette rod charging control unit 13 to be turned on according to the cigarette case access signal, and meanwhile, the cigarette case master control unit 21 receives and controls the boosting function of the cigarette case boosting circuit unit 23 and the turning-on of the cigarette case power supply switch and the temperature measuring unit 25 according to the cigarette rod access signal. Because the cigarette case power supply interface 26 is connected with the cigarette rod charging interface 15 when the cigarette rod is smoked with the cigarette case, the cigarette rod control circuit and the cigarette case control circuit form a cigarette rod charging loop, and the cigarette case battery 22 charges the cigarette rod battery 14.
When the cigarette rod is separated from the cigarette case, the cigarette rod sensing unit 12 senses the separation of the cigarette rod triggering unit to generate a cigarette case separation signal, and meanwhile, the cigarette case sensing unit 24 senses the separation of the cigarette case triggering unit to generate a cigarette rod separation signal; the cigarette rod master control unit 11 receives and controls the charging function of the cigarette rod charging control unit 13 to be turned off according to the cigarette case leaving signal, and at the same time, the cigarette case master control unit 21 receives and controls the boosting function of the cigarette case boosting circuit unit 23 and the turning off of the cigarette case power supply switch and the temperature measuring unit 25 according to the cigarette rod leaving signal, so that the cigarette rod charging circuit formed by the cigarette rod control circuit and the cigarette case control circuit is disconnected, and the cigarette case battery 22 stops charging the cigarette rods.
When the induction unit on the cigarette rod interacts with the trigger unit on the cigarette case, the induction unit on the cigarette case interacts with the trigger unit on the cigarette rod, and the induction unit on the cigarette case and the trigger unit on the cigarette rod respectively simultaneously generate an access signal or a departure signal, so that the existing arrangement for detecting pins is replaced, the number of the connected pins is reduced, the good contact probability of the cigarette rod and the cigarette case is improved, and the realization of the charging function is ensured.
After the cigarette rod is disconnected from the cigarette case, the boosting function of the cigarette case boosting circuit and the power supply switch of the cigarette case are both closed together with the temperature measuring unit 25, and at the moment, the power supply interface 26 of the cigarette case is not electrified, so that potential safety hazards cannot exist even if two connecting pins are in short circuit. And when the boosting function of the cigarette case boosting circuit, the cigarette case power supply switch and the temperature measuring unit 25 are all closed, the cigarette rod and the cigarette case enter a sleep state, so that energy is saved, and meanwhile, the stability of the cigarette rod control circuit and the stability of the cigarette case control circuit are also improved.
As shown in fig. 1 and 5, the tobacco rod control circuit further includes a tobacco rod overcurrent protection unit 16, which is connected to the tobacco rod battery 14. The cigarette rod overcurrent protection unit 16 comprises a cigarette rod battery protection chip, and when the current of the cigarette rod battery 14 is greater than a certain value, the cigarette rod battery protection chip cuts off a loop where the cigarette rod battery 14 is located, so that overcurrent protection is realized.
Because the voltage of the tobacco rod battery 14 is obviously fluctuated particularly after the tobacco rod battery is loaded, the tobacco rod control circuit is provided with the tobacco rod voltage stabilizing unit 17, and the tobacco rod battery 14, the tobacco rod master control unit 11 and the tobacco rod sensing unit 12 are all connected with the tobacco rod voltage stabilizing unit 17, as shown in fig. 1. As shown in fig. 6, the tobacco rod voltage stabilizing unit 17 includes a voltage stabilizing chip, the tobacco rod battery 14 outputs the voltage Vbat to the input Vin of the tobacco rod voltage stabilizing chip, and after passing through the tobacco rod voltage stabilizing chip, outputs the high-precision voltage V285, so as to provide a stable power supply for the tobacco rod master control unit 11 and the tobacco rod sensing unit 12.
In addition, as shown in fig. 1, the tobacco rod control circuit further comprises a tobacco rod indicating unit 18, which comprises two LEDs connected with the tobacco rod general control unit, as shown in fig. 8. The tobacco rod battery 14 outputs a stabilized voltage V285 to power the LEDs through the tobacco rod voltage stabilizing unit 17. The tobacco rod indicating unit 18 is connected with the tobacco rod master control unit 11 and is used for receiving a control signal of the tobacco rod master control unit 11, so that the charging and discharging states of the tobacco rod battery 14 are displayed.
As shown in fig. 2, the cigarette case control circuit further includes a cigarette case overcurrent protection unit 27, and the cigarette case overcurrent protection unit 27 is connected to the cigarette case battery 22. As shown in fig. 13, the cigarette case overcurrent protection unit includes a cigarette case battery current protection chip, and when the current of the cigarette case battery 22 is greater than a certain value, the cigarette case battery current protection chip cuts off the loop where the cigarette case battery 22 is located, so as to implement overcurrent protection.
Specifically, in the present embodiment, as shown in fig. 5, the smoke rod charging control unit 13 includes a charging chip U5, a MOS transistor Q1, a resistor R1, a resistor R2, a resistor R18, a resistor R19, an inductor L5, and a capacitor C5; the model of the charging chip is HM 5052.
An enabling end TS of the charging chip U5 is connected in series to the positive electrode CH + of the smoke rod charging interface 15 through a resistor R18 and is connected with the drain end of the MOS transistor Q1; the source electrode of the MOS tube Q1 is grounded; the gate of the MOS transistor Q1 is connected to the smoke rod overall control unit 11 and is grounded through a resistor R19. The opening and closing of the cigarette rod charging control unit 13 is realized by opening and closing the charging function of the charging chip U5.
The power supply terminal VCC of the charging chip U5 is connected with the positive electrode CH + of the tobacco rod charging interface 15. The charging current setting terminal PROG of the charging chip U5 is grounded through a resistor R1 for setting a maximum charging current. The charging completion indication terminal NSTDBY of the charging chip U5 is connected to the smoke-rod overall control unit 11, and indicates that it is fully charged when it is at a low level. The charging state indicating terminal NCHRG of the charging chip U5 is connected to the tobacco rod overall control unit 11, and indicates that charging is being performed when the charging state indicating terminal NCHRG is at a low level. The switch end LX of the charging chip U5 is connected in series to the positive electrode of the smoke rod battery 14 through an inductor L5 to provide large current for charging the smoke rod battery 14; and the end of the inductor L5 connected to the positive terminal of the smoke rod battery 14 is also connected in series to ground through a capacitor C6. The ground end GND of the charging chip U5 is grounded, the battery voltage detection terminal BAT of the charging chip U5 is connected in series to the anode of the tobacco rod battery 14 through a resistor R2, and the end voltage of the tobacco rod battery 14 can be set.
In addition, a capacitor C1 is arranged between the positive electrode CH + and the negative electrode CH-of the smoke rod charging interface 15, and the negative electrode CH-of the smoke rod charging interface 15 is grounded.
When the cigarette rod is connected with the cigarette case, the cigarette rod master control unit 11 outputs a high level to the grid of the MOS tube Q1, the MOS tube Q1 is cut off, the enabling end TS of the charging chip U5 is a high level, the charging chip U5 opens the charging function, and the cigarette rod charging control unit 13 opens. When the cigarette rod is separated from the cigarette case, when the cigarette rod master control unit 11 outputs a low level to the gate of the MOS transistor Q1, the MOS transistor Q1 is turned on, the enable terminal TS of the charging chip U5 is pulled low, the charging chip U5 turns off the charging function, and the cigarette rod charging control unit 13 turns off.
As shown in fig. 10, the cigarette case voltage boost circuit includes a voltage boost chip U4, a resistor R15, and a voltage boost chip U4, and is used for a conventionally set peripheral circuit of voltage boost conversion, the output terminal of the cigarette case battery 22 is connected with the power input terminal VIN of the voltage boost chip U4, the positive electrode Vout + of the cigarette case power supply interface 26 is connected with the voltage boost conversion output terminal Vout of the voltage boost chip U4, and the enable terminal EN of the voltage boost chip U4 is connected with the cigarette case general control unit 21 through a series resistor R15.
When the cigarette rod and the cigarette case are connected, the cigarette case master control unit 21 outputs a high level to the enable end EN of the boosting chip U4, the boosting chip opens the boosting function, the boosting conversion output end VOUT of the boosting chip U4 outputs 5V standard voltage, and the cigarette case power supply interface 26 has 5V voltage. When the cigarette rod is separated from the cigarette case, the cigarette case master control unit 21 outputs a low level to the enable end EN of the boosting chip U4, the boosting function of the boosting chip U4 is invalid, and the boosting conversion output end VOUT of the boosting chip U4 has no voltage output, so that the cigarette case power supply interface 26 also has no voltage output.
As shown in fig. 11, the cigarette case power supply switch and temperature measurement unit 25 includes a power supply switch chip U2, a resistor R24, a resistor R8, a resistor R5, a resistor R22, and a capacitor C4, and the power supply switch chip U2 is Q/AP 6982; the grid terminal G of the power supply switch chip U2 is connected with the cigarette case master control unit 21 through a series resistor R24 and is grounded through a resistor R5; the source terminal S of the power supply switch chip U2 is connected with the cigarette case master control unit 21 through a series resistor R8 and is grounded through a resistor R22; the connection point of the resistor R8 and the cigarette case master control unit 21 is also grounded through a capacitor C4; the drain end D of the power supply switch chip U2 is connected with the negative pole Vout-of the cigarette case power supply interface 26; in the embodiment, the power supply switch of the heating body and the temperature measurement are integrated into a whole, and in order to provide larger current, the power supply switch is connected with a plurality of ports outside the MOS tube, so that the current flowing through the switch is increased.
The cigarette case power supply interface 26 is exposed and is uncharged when the cigarette rod is separated from the cigarette case, so that potential safety hazards cannot exist even if the anode and the cathode of the cigarette case power supply interface 26 are short-circuited. Only when the cigarette case detects that the cigarette rod is closed, the cigarette case power supply switch and the temperature measuring unit 25 are turned on to supply power to the outside.
As shown in fig. 4 and 12, the cigarette rod sensing unit 12 is a hall switch S2, the output end VDD of the cigarette rod hall switch S2 is connected to the cigarette rod master control unit 11, and the cigarette rod triggering unit is a magnet disposed on the cigarette case and corresponding to the cigarette rod sensing unit 12; the cigarette case sensing unit 24 is a Hall switch S3, the output end VDD of the cigarette case Hall switch S3 is connected with the cigarette case master control unit 21, and the cigarette case triggering unit is a magnet which is arranged on the cigarette rod and corresponds to the cigarette case sensing unit 24.
When the cigarette rod is sucked to the cigarette case: the cigarette rod hall switch S2 senses a magnet on the cigarette case, and the output end VDD outputs an edge signal (rising edge or falling edge), that is, a cigarette case access signal, to the cigarette rod master control unit 11 to wake up the cigarette rod master control unit 11, so that the cigarette rod charging control unit 13 opens the charging function; meanwhile, the cigarette case hall switch S3 senses the magnet on the cigarette rod, and the output end VDD outputs an edge signal (rising edge or falling edge), that is, a cigarette rod access signal, to the cigarette case general control unit 21 to wake up the cigarette case general control unit 21, so that the cigarette case voltage boosting circuit unit 23 is enabled and the cigarette case power supply switch and the temperature measuring unit 25 are turned on, and the cigarette case voltage boosting circuit outputs a standard 5V voltage, so that the cigarette case power supply interface 26 has a 5V voltage. Because the cigarette rod is attracted with the cigarette case, the cigarette case power supply interface 26 is connected with the cigarette rod charging interface 15, the cigarette rod control circuit and the cigarette case control circuit form a cigarette rod charging loop, and the cigarette case battery 22 charges the cigarette rod battery 14.
When the tobacco rod leaves the cigarette box: the cigarette rod hall switch S2 cannot sense the magnet on the cigarette case, and the output end VDD outputs an edge signal (falling edge or rising edge), i.e., a cigarette case leaving signal, to the cigarette rod master control unit 11 to enable the cigarette rod charging control unit 13 to turn off the charging function; meanwhile, the cigarette case hall switch S3 cannot sense the magnet on the cigarette rod, the output end VDD outputs an edge signal (falling edge or rising edge), that is, a cigarette rod leaving signal, to the cigarette case master control unit 21 so that the cigarette case booster circuit unit 23 fails and the cigarette case power supply switch and the temperature measurement unit 25 are turned off, the cigarette case power supply interface 26 is not powered, and thus, the cigarette rod charging loop formed by the cigarette rod control circuit and the cigarette case control circuit is disconnected, and the cigarette case battery 22 stops charging the cigarette rod battery 14.
In this embodiment, in the tobacco rod control circuit of the present application, as shown in fig. 1, the tobacco rod master control unit 11, the tobacco rod voltage stabilizing unit 17 and the tobacco rod battery 14 are further connected to two sections of heating bodies and temperature detecting units 19. As shown in fig. 7, the heating body and temperature detecting unit includes a heating body and a temperature sensor, which are respectively connected to the smoke rod master control unit 11. When the tobacco rod is started and smoking begins, the tobacco rod battery 14 begins to heat the first section of heating body F1, meanwhile, the temperature sensor R7 detects the real-time temperature of the section and sends the real-time temperature to the tobacco rod master control unit 11, and when the temperature reaches a target temperature value, the tobacco rod enters a heat preservation state. After a certain period of time, the tobacco rod battery 14 stops heating the first-stage heating body F1 after the tobacco is volatilized. After the first section is heated, the smoke rod battery 14 starts to heat the second section of heating body F2, and simultaneously the temperature sensor R17 detects the real-time temperature of the section, and when the temperature reaches the target temperature value, the section enters a heat preservation state. And after a certain time, stopping the second section of heating and shutting down the machine after the tobacco is volatilized.
Specifically, as shown in fig. 3, the tobacco rod master control unit 11 includes a tobacco rod master control chip U1. The cigarette rod master control chip U1 receives signals output from the cigarette rod sensing unit 12, charging state signals output from the cigarette rod charging control unit 13, temperature signals detected by the temperature sensor, and the like for each I/O port, and outputs control signals through each I/O port according to these signals, thereby controlling the enable terminal of the charging chip of the cigarette rod charging control unit 13 to turn on or off the charging function, control the heating function of the heating body to be turned on, and control various status displays of the cigarette rod indicating unit 18.
In this embodiment, in the cigarette case control circuit of the present application, the cigarette case general control unit 21 and the cigarette case battery 22 are further connected to the cigarette case charging unit 29 and the cigarette case indicating unit 28, respectively. As shown in fig. 15, the cigarette case charging unit 29 is controlled by the cigarette case general control unit 21 to charge the cigarette case battery BT1 through the USB interface J1. Meanwhile, as shown in fig. 14, the cigarette case indication unit 28 includes 5 LEDs, two ends of which are respectively connected to the cigarette case battery 22 and the cigarette case general control unit 21, and the LEDs are powered by the cigarette case battery and receive the control signal of the cigarette case general control unit 21 to display the charging state, the electric quantity, and the like of the cigarette case battery 22.
Specifically, as shown in fig. 9, the cigarette case total control unit 21 includes a cigarette case total control chip. The cigarette rod master control chip receives signals output by the cigarette case induction unit 24 and charging state signals output by the cigarette case charging unit 29 through the I/O ports, outputs control signals through the I/O ports according to the signals, controls the enabling end of the boosting chip of the cigarette case boosting circuit unit 23 to turn on or turn off the boosting function, and controls the power supply switch of the cigarette case and the temperature measuring unit 25 to turn on or turn off.
The foregoing is merely a preferred embodiment of the invention and it will be appreciated by those skilled in the art that changes could be made to the embodiment herein without departing from the spirit of the invention. The above examples are merely illustrative and should not be taken as limiting the scope of the invention.
Claims (6)
1. A split type low-temperature smoking set charging detection control circuit is characterized by comprising a tobacco rod control circuit and a cigarette case control circuit;
the tobacco rod control circuit comprises: the cigarette rod charging control device comprises a cigarette rod master control unit, a cigarette rod sensing unit, a cigarette rod charging control unit, a cigarette rod battery and a cigarette rod triggering unit; the tobacco rod sensing unit and the tobacco rod charging control unit are both connected with the tobacco rod master control unit, the tobacco rod charging control unit is also connected with a tobacco rod battery and a tobacco rod charging interface, and the tobacco rod battery also provides power for the tobacco rod master control unit and the tobacco rod sensing unit;
the cigarette case control circuit includes: the cigarette case comprises a cigarette case master control unit, a cigarette case induction unit, a cigarette case booster circuit unit, a cigarette case power supply switch and temperature measurement unit, a cigarette case battery and a cigarette case trigger unit; the cigarette case voltage boosting circuit unit, the cigarette case induction unit, the cigarette case power supply switch and the temperature measurement unit are all connected with the cigarette case master control unit, the cigarette case voltage boosting circuit unit is connected with a cigarette case battery and the anode Vout + of the cigarette case power supply interface, the cigarette case power supply switch is connected with the temperature measurement unit and the cathode Vout-of the cigarette case power supply interface, and the cigarette case battery also provides power for the cigarette case master control unit and the cigarette case induction unit;
the cigarette rod triggering unit is arranged on the cigarette case and used for triggering the cigarette rod sensing unit;
the cigarette case triggering unit is arranged on the cigarette rod and used for triggering the cigarette case induction unit;
the cigarette case voltage boosting circuit comprises a voltage boosting chip U4 and a resistor R15, the output end of a cigarette case battery is connected with the power input end VIN of the voltage boosting chip U4, the positive electrode Vout + of a cigarette case power supply interface is connected with the voltage boosting conversion output end VOUT of the voltage boosting chip U4, and the enabling end EN of the voltage boosting chip U4 is connected with the cigarette case master control unit through a series resistor R15;
the tobacco rod charging control unit comprises a charging chip U5, an MOS tube Q1, a resistor R1, a resistor R2, a resistor R18, a resistor R19, an inductor L5 and a capacitor C5;
an enabling end TS of the charging chip U5 is connected in series to the positive electrode CH + of the smoke rod charging interface through a resistor R18 and is connected with the drain end of the MOS transistor Q1; the source electrode of the MOS tube Q1 is grounded; the control end of the MOS tube Q1 is connected with the smoke rod master control unit and is grounded through a resistor R19;
a power supply terminal VCC of a charging chip U5 is connected with a positive electrode CH + of a tobacco rod charging interface, a charging current setting terminal PROG of the charging chip U5 is grounded through a resistor R1, a charging completion indication terminal NSTDBY and a charging state indication terminal NCHRG of the charging chip U5 are both connected with a tobacco rod master control unit, a switch terminal LX of the charging chip U5 is connected in series with the positive electrode of a tobacco rod battery through an inductor L5, one end of the inductor L5 connected with the positive electrode of the tobacco rod battery is also connected in series with the ground through a capacitor C6, a grounding terminal GND of the charging chip U5 is grounded, and a battery voltage detection terminal BAT of the charging chip U5 is connected in series with the positive electrode of the tobacco rod battery through a resistor R2;
the cigarette case power supply switch and temperature measuring unit comprises a power supply switch chip U2, a resistor R24, a resistor R8, a resistor R5, a resistor R22 and a capacitor C4, wherein the model of the power supply switch chip U2 is Q/AP 6982; the grid terminal G of the power supply switch chip U2 is connected with the cigarette case master control unit through a series resistor R24 and is grounded through a resistor R5; the source terminal S of the power supply switch chip U2 is connected with the cigarette case master control unit through a series resistor R8 and is grounded through a resistor R22; the connection point of the resistor R8 and the cigarette case master control unit is also grounded through a capacitor C4; the drain end D of the power supply switch chip U2 is connected with the negative pole Vout-of the cigarette case power supply interface.
2. The circuit of claim 1, wherein the tobacco rod control circuit further comprises a tobacco rod overcurrent protection unit, and the tobacco rod overcurrent protection unit is connected with a tobacco rod battery.
3. The circuit of claim 1, wherein the tobacco rod control circuit further comprises a tobacco rod voltage stabilizing unit, and the tobacco rod battery, the tobacco rod master control unit and the tobacco rod sensing unit are all connected with the tobacco rod voltage stabilizing unit.
4. The circuit of claim 1, wherein the tobacco rod control circuit further comprises a tobacco rod indicating unit, and the tobacco rod indicating unit is connected with the tobacco rod general control unit.
5. The circuit of claim 1, wherein the pack control circuit further comprises a pack over-current protection unit connected to a pack battery.
6. The circuit of claim 1, wherein the cigarette rod sensing unit is a hall switch, and the cigarette rod triggering unit is a magnet disposed on the cigarette case and corresponding to the cigarette rod sensing unit; the cigarette case induction unit is a Hall switch, and the cigarette case trigger unit is a magnet which is arranged on the cigarette rod and corresponds to the cigarette case induction unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810953493.9A CN110854941B (en) | 2018-08-21 | 2018-08-21 | Split type low temperature smoking set charging detection control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810953493.9A CN110854941B (en) | 2018-08-21 | 2018-08-21 | Split type low temperature smoking set charging detection control circuit |
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| CN110854941A CN110854941A (en) | 2020-02-28 |
| CN110854941B true CN110854941B (en) | 2021-01-29 |
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| CN114176261B (en) * | 2021-12-28 | 2024-04-09 | 四川三联新材料有限公司 | Device for heating non-combustible tobacco |
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