CN114312038A - Power supply control system and method, printing equipment and power supply control method thereof - Google Patents
Power supply control system and method, printing equipment and power supply control method thereof Download PDFInfo
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- CN114312038A CN114312038A CN202111662596.8A CN202111662596A CN114312038A CN 114312038 A CN114312038 A CN 114312038A CN 202111662596 A CN202111662596 A CN 202111662596A CN 114312038 A CN114312038 A CN 114312038A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention discloses a power supply control system and method, printing equipment and a power supply control method thereof, wherein the printing equipment comprises a first power supply circuit, a power supply module, a power supply management circuit, a master control circuit and a printing module; the first power supply circuit is connected with the external power supply module and supplies power to power-using components of the printing equipment; when the printing equipment is in a printing working mode, the power supply module is used as a second power supply circuit and supplies power to the power supply management circuit together with the first power supply circuit; when the printing equipment is in a non-printing working mode, the power supply management circuit controls the first power supply circuit to charge the power supply module. The invention can realize the requirement of high peak current in the set working state of the electrical equipment such as a printer and the like through a convenient interface without configuring a power adapter. The invention reduces the cost of the whole machine, does not need the authentication of the adapter, reduces the authentication cost and simplifies the installation and wiring.
Description
Technical Field
The invention belongs to the technical field of printing equipment, relates to printing equipment, and particularly relates to a power supply control system and method, the printing equipment and a power supply control method thereof.
Background
At present, 58mm and 80mm thermal printers on the market are generally powered by a power adapter due to large power consumption in the printing process, and can provide large peak current so as to ensure the printing process and the stability of motor paper feeding. However, this solution is costly, requires higher authentication requirements for the device with the adapter, and, because the power adapter and the power cord are hung behind the device, it may cause a certain safety hazard and the wiring is messy.
In view of the above, there is an urgent need to design a new printer device to overcome at least some of the above-mentioned disadvantages of the existing printer devices.
Disclosure of Invention
The invention provides a power supply control system and method, printing equipment and a power supply control method thereof, which can realize the requirement of high peak current in the set working state of electric equipment such as printers and the like through a convenient interface without configuring a power adapter.
In order to solve the technical problem, according to one aspect of the present invention, the following technical solutions are adopted:
a printing apparatus, the printing apparatus comprising: the printing system comprises a first power supply circuit, a power supply module, a power supply management circuit, a main control circuit and a printing module;
the first power supply circuit is connected with the external power supply module and supplies power to power-using components of the printing equipment; the power management circuit is respectively connected with the first power supply circuit and the power module;
when the printing equipment is in a printing working mode, the power supply module is used as a second power supply circuit and supplies power to the power supply management circuit together with the first power supply circuit; the power management circuit outputs a supply voltage of a first output voltage to a first electric component of the printing module, and the power management circuit outputs a supply voltage of a second output voltage to a second electric component of the printing module and the main control circuit; wherein the first output voltage is greater than the second output voltage;
when the printing equipment is in a non-printing working mode, the power supply management circuit controls the first power supply circuit to charge the power supply module.
As an embodiment of the present invention, the power management circuit includes a power management main control circuit and a boost control circuit, and an output terminal of the power management main control circuit is connected to the boost control circuit; the boost control circuit is used for boosting the voltage output by the power management main control circuit to the first output voltage;
the output of the boost control circuit is connected with the first electric component of the printing module and provides a first output voltage for the first electric component of the printing module.
As an embodiment of the present invention, the power management circuit further includes a voltage conversion circuit, and an output terminal of the power management main control circuit is connected to the voltage conversion circuit; the voltage conversion circuit is used for converting the voltage output by the power management main control circuit into a second output voltage;
the output end of the voltage conversion circuit is connected with the second electrical component and the main control circuit of the printing module, and provides a second output voltage for the second electrical component and the main control circuit of the printing module.
As an embodiment of the present invention, the power module includes a battery supporting a high-rate discharge current;
the power management main control circuit comprises a battery voltage monitoring module and a charging management circuit, wherein the battery voltage monitoring module is used for detecting the voltage of a battery, and the charging management circuit is used for charging the battery;
the main control circuit comprises a charging cooperation management module, the charging cooperation management module is connected with the charging management circuit and used for sending a charging signal to the charging management circuit when the output voltage of the battery is lower than a set threshold value when the printing equipment is in a printing state, and the charging management circuit charges the battery when the printing equipment is in a non-printing state.
As an embodiment of the present invention, the voltage converting circuit includes a low voltage linear voltage stabilizing circuit, which is used to convert the voltage output by the power management main control circuit into a 3.3V voltage.
As an embodiment of the present invention, the main control circuit is connected to the print module, and configured to send a control signal to the print module;
the main control circuit is connected with the power management circuit and used for sending the working mode of the printing equipment to the power management circuit.
As an embodiment of the present invention, the first electrical component of the printing module includes a printing driving circuit, a printing driving mechanism and a heating mechanism, which are required to operate at a first output voltage;
the second electrical component of the print module comprises a print head control circuit required to operate at a second output voltage; the printing head control circuit is connected with the heating mechanism and used for sending a control signal to the heating mechanism.
As an embodiment of the present invention, the first power supply circuit is connected to a USB interface, and can be connected to an external power supply module through the USB interface; the power module is a battery supporting high-rate discharge current.
As an embodiment of the present invention, the power management circuit includes a charge control circuit; the charge control circuit includes: the circuit comprises a first chip U1, a first MOS transistor Q1 and a second MOS transistor Q2;
the source S of the first MOS transistor Q1 is grounded, the gate G of the first MOS transistor Q1 is connected to an input voltage, and the drain D of the first MOS transistor Q1 is connected to the gate G of the second MOS transistor Q2 and the resistor R12, so as to control the second MOS transistor Q2; the drain electrode D of the second MOS tube is connected to the first third pin and the first fourth pin of the first chip U1 through circuits, and the source electrode S of the second MOS tube is connected to the power supply module through circuits to control charging and discharging of the power supply module.
As an embodiment of the present invention, the charging control circuit further includes a first inductor L1, a plurality of capacitors, and a plurality of resistors;
the second zero pin SW pin of the first chip U1 is respectively connected with the first nine pin SW pin of the first chip U1, the first end of a second capacitor C2, the first end of a first inductor L1, the first six pin SYS pin of the first chip U1, the first five pin SYS pin of the first chip U1, the first end of a fourth capacitor C4 and the first end of a fifth capacitor C5;
a second pin BTST of the first chip U1 is connected with a second end of a second capacitor C2; a second pin REGN of the first chip U1 is connected to a first end of a third capacitor C3, and a second end of the third capacitor C3 is grounded;
a first four pin BAT pin of the first chip U1 is respectively connected with a first three pin BAT pin of the first chip U1 and a drain of a second MOS transistor Q2, and a source of the second MOS transistor Q2 is respectively connected with a first end of a first two-resistor R12 and a first end of a first three-resistor R13;
the grid electrode of the second MOS transistor Q2 is respectively connected with the second end of the first diode R12 and the drain electrode of the first MOS transistor Q1; the source electrode of the first MOS tube Q1 is grounded; the grid electrode of the first MOS tube Q1 is connected with a power supply voltage;
a first pin VAC of the first chip U1 is respectively connected with a second four pin VBUS pin of the first chip U1 and a second end of a fourth resistor R4, and a first end of the fourth resistor R4 is connected with a power supply voltage;
a second third pin PMD pin of the first chip U1 is connected with a second end of a first capacitor C1, and a first end of the first capacitor C1 is grounded;
a second pin PSEL of the first chip U1 is connected with a second end of a first one-to-one resistor R11, and a first end of the first one-to-one resistor R11 is grounded;
the third pin NPG of the first chip U1 is connected to a fifth resistor R5, the fourth pin STAT of the first chip U1 is connected to a sixth resistor R6, the fifth pin SCL of the first chip U1 is connected to a seventh resistor R7, the sixth pin SDA of the first chip U1 is connected to an eighth resistor R8, and the seventh pin NINT of the first chip U1 is connected to a ninth resistor R9;
a ninth pin NCE of the first chip U1 is connected to a second terminal of a tenth resistor R10, and a first terminal of the tenth resistor R10 is grounded;
a first pin TS of the first chip U1 is respectively connected with a second end of a first resistor R1, a first end of a second resistor R2 and a first end of a third resistor R3; the second end of the second resistor R2 and the second end of the third resistor R3 are respectively grounded.
As an embodiment of the present invention, the boost control circuit includes: the second chip U2, a second inductor L2, a plurality of capacitors and a plurality of resistors;
the VCC pin of the second chip U2 is connected to the second end of the eighth capacitor C8, and the first end of the eighth capacitor C8 is grounded;
a VIN pin of the second chip U2 is respectively connected with a first end of a first fourth resistor R14, a first end of a sixth capacitor C6 and a first end of a second inductor L2; a second end of the sixth capacitor C6 is grounded;
a second end of the second inductor L2 is connected to a SW pin of a second chip U2 and a first end of a seventh capacitor C7, respectively, and a second end of the seventh capacitor C7 is connected to a BOOT pin of the second chip U2;
a VOUT pin of the second chip U2 is connected to a first end of a tenth capacitor C10, a first end of a first two-capacitor C12, a first end of a first five-capacitor C15, a first end of a first eight-resistor R18, and a first end of a first seven-capacitor C17, respectively;
the GND pin of the second chip U2, the second end of the tenth capacitor C10, the second end of the first two capacitor C12, the second end of the first five capacitor C15 and the second end of the first seven capacitor C17 are respectively grounded; a second end of the first eight resistor R18 is connected to the FB pin of the second chip U2 and a first end of a first nine resistor R19, respectively, and a second end of the first nine resistor R19 is grounded;
the COMP pin of the second chip U2 is respectively connected with a first end of a first capacitor C11 and a first end of a first seven resistor R17, and a second end of the first seven resistor R17 is connected with a first end of a first third capacitor C13; the second end of the first capacitor C11 and the second end of the first third capacitor C13 are respectively grounded;
the ILIM pin of the second chip U2 is connected to a first end of a first sixth resistor, and a second end of the first sixth resistor is grounded.
As an embodiment of the present invention, the voltage conversion circuit includes a third chip U3, a plurality of capacitors, and a plurality of resistors;
the IN pin of the third chip U3 is respectively connected with the second end of a first fourth resistor R14, the first end of a ninth capacitor C9 and the first end of a first fifth resistor R15; a second end of the ninth capacitor C9 is grounded, and a second end of the first fifth resistor R15 is connected to the EN pin of the third chip U3; the GND pin of the third chip U3 is grounded;
the BP/FB pin of the third chip U3 is connected with a first end of a first four-capacitor C14, and a second end of the first four-capacitor C14 is grounded; the OUT pin of the third chip U3 is connected to the first end of a first sixth capacitor C16 and the first end of a second zero resistor R20, respectively, and the second end of the first sixth capacitor C16 is grounded.
According to another aspect of the invention, the following technical scheme is adopted: a power supply control system is connected with a power utilization component of a corresponding power utilization device; the power supply control system includes: the power supply device comprises a first power supply circuit, a power supply module and a power supply management circuit;
the first power supply circuit is connected with an external power supply module; the power management circuit is respectively connected with the first power supply circuit and the power module;
when the electric equipment is in a first state, the power supply module serves as a second power supply circuit and supplies power to the power management circuit together with the first power supply circuit; the power management circuit outputs a supply voltage of a first output voltage to a first electrical component of the electrical device, and the power management circuit outputs a supply voltage of a second output voltage to a second electrical component of the electrical device; wherein the first output voltage is greater than the second output voltage;
when the electric equipment is in a second state, the power management circuit controls the first power supply circuit to charge the power module.
As an embodiment of the present invention, the power supply control system further includes a master control circuit, and the master control circuit is configured to acquire a state of the power consumption device and send the acquired state data of the power consumption device to the power management circuit.
As an embodiment of the present invention, the power management circuit includes a power management main control circuit and a boost control circuit, and an output terminal of the power management main control circuit is connected to the boost control circuit; the boost control circuit is used for boosting the voltage output by the power management main control circuit to the first output voltage;
the output of the boost control circuit is connected with the first electric component of the printing module and provides a first output voltage for the first electric component of the printing module.
As an embodiment of the present invention, the power module includes a battery supporting a high-rate discharge current;
the power management main control circuit comprises a battery voltage monitoring module and a charging management circuit, wherein the battery voltage monitoring module is used for detecting the voltage of a battery, and the charging management circuit is used for controlling the charging of the battery;
the main control circuit comprises a charging cooperation management module, the charging cooperation management module is connected with the charging management circuit and used for sending a charging signal to the charging management circuit when the output voltage of the battery is lower than a set threshold value when the printing equipment is in a printing state, and the charging management circuit charges the battery when the printing equipment is in a non-printing state.
As an embodiment of the present invention, the power management circuit further includes a voltage conversion circuit, and an output terminal of the power management main control circuit is connected to the voltage conversion circuit; the voltage conversion circuit is used for converting the voltage output by the power management main control circuit into a second output voltage;
the output end of the voltage conversion circuit is connected with the second electrical component and the main control circuit of the printing module, and provides a second output voltage for the second electrical component and the main control circuit of the printing module.
As an embodiment of the present invention, the electric device is a printing device; the electric component of the printing equipment comprises a printing module, wherein the printing module comprises a printing driving circuit, a printing driving mechanism, a heating mechanism and a printing head control circuit;
the first electric component comprises a printing driving circuit, a printing driving mechanism and a heating mechanism which need to work under a first output voltage;
the second electrical component comprises printhead control circuitry required to operate at a second output voltage; the printing head control circuit is connected with the heating mechanism and used for sending a control signal to the heating mechanism.
According to another aspect of the invention, the following technical scheme is adopted: a printing apparatus power supply control method, the printing apparatus power supply control method comprising:
step S1, acquiring the state of the printing device;
step S2, providing power supply for the electric parts of the printing device according to the state of the printing device;
when the printing equipment is in a printing working mode, the power supply module is used as a second power supply circuit and supplies power to the power supply management circuit together with the first power supply circuit; the power management circuit outputs a supply voltage of a first output voltage to a first electric component of the printing module, and the power management circuit outputs a supply voltage of a second output voltage to a second electric component of the printing module and the main control circuit; wherein the first output voltage is greater than the second output voltage;
when the printing equipment is in a non-printing working mode, the power supply management circuit controls the first power supply circuit to charge the power supply module.
According to another aspect of the invention, the following technical scheme is adopted: a power supply control method, the power supply control method comprising:
step S1, acquiring the state of the electric equipment;
step S2, providing power supply for the electric parts of the electric equipment according to the state of the electric equipment;
when the electric equipment is in a first state, the power supply module serves as a second power supply circuit and supplies power to the power management circuit together with the first power supply circuit; the power management circuit outputs a supply voltage of a first output voltage to a first electrical component of the electrical device, and the power management circuit outputs a supply voltage of a second output voltage to a second electrical component of the electrical device; wherein the first output voltage is greater than the second output voltage;
when the electric equipment is in a second state, the power management circuit controls the first power supply circuit to charge the power module.
The invention has the beneficial effects that: according to the power supply control system and method, the printing equipment and the power supply control method thereof, the requirement of high peak current in the set working state of the electric equipment such as the printer can be realized through a convenient interface, and a power adapter does not need to be configured. The invention reduces the cost of the whole machine, does not need the authentication of the adapter, reduces the authentication cost and simplifies the installation and wiring. In a use scenario of the invention, the invention provides a design scheme of a thermal printer powered by a common USB, which can solve the problem that the peak current of the traditional USB power supply is insufficient in a printing mode.
Drawings
FIG. 1 is a schematic diagram of a printing apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of the printing apparatus according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of a charge control circuit according to an embodiment of the invention.
Fig. 4 is a circuit diagram of a boost control circuit according to an embodiment of the invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
The description in this section is for several exemplary embodiments only, and the present invention is not limited only to the scope of the embodiments described. It is within the scope of the present disclosure and protection that the same or similar prior art means and some features of the embodiments may be interchanged.
The steps in the embodiments in the specification are only expressed for convenience of description, and the implementation manner of the present application is not limited by the order of implementation of the steps.
"coupled" in this specification includes both direct and indirect connections, such as through some active device, passive device, or electrically conductive medium; but also may include connections through other active or passive devices, such as through switches, follower circuits, etc., that are known to those skilled in the art for achieving the same or similar functional objectives.
The present invention discloses a printing apparatus (such as a thermal printer), fig. 1 is a schematic diagram of the printing apparatus according to an embodiment of the present invention; referring to fig. 1, the printing apparatus includes: the printing device comprises a first power supply circuit 1, a power supply module 2, a power supply management circuit 3, a main control circuit 4 and a printing module 5. The first power supply circuit 1 is connected with an external power supply module and supplies power to power-using components of the printing equipment; the power management circuit 3 is respectively connected with the first power supply circuit 1 and the power module 2.
When the printing device is in a printing working mode, the power supply module 2 serves as a second power supply circuit and supplies power to the power supply management circuit 3 together with the first power supply circuit; the power management circuit 3 outputs a supply voltage of a first output voltage to a first electrical component of the printing module 5, and the power management circuit 3 outputs a supply voltage of a second output voltage to a second electrical component of the printing module 5 and the main control circuit 4; wherein the first output voltage is greater than the second output voltage.
When the printing device is in a non-printing working mode, the power management circuit 3 controls the first power supply circuit 1 to charge the power module 2.
In an embodiment of the present invention, the power management circuit 3 includes a power management main control circuit 31 and a boost control circuit 32, and an output terminal of the power management main control circuit 31 is connected to the boost control circuit 32; the boost control circuit 32 is configured to boost the voltage output by the power management main control circuit 31 to the first output voltage. The output of the boost control circuit 32 is connected to the first electrical component of the print module 5 to provide a first output voltage to the first electrical component of the print module 5.
In an embodiment, the power management circuit 3 further includes a voltage conversion circuit 33, and an output terminal of the power management main control circuit 31 is connected to the voltage conversion circuit 33; the voltage converting circuit 33 is configured to convert the voltage output by the power management main control circuit 31 into a second output voltage. The output end of the voltage conversion circuit 33 is connected to the second electrical component of the print module 5 and the main control circuit 4, and provides a second output voltage for the second electrical component of the print module 5 and the main control circuit 4.
In a usage scenario of the present invention, the power management main control circuit 31 outputs a voltage of 4V, and the voltage conversion circuit 33 converts the voltage of 4V output by the power management main control circuit 31 into a voltage of 3.3V for circuit elements to use. The voltage conversion circuit 33 may be a low dropout linear regulator circuit or a buck circuit.
The power module 3 may include a battery that supports high rate discharge current. The power management main control circuit 31 may include a battery voltage monitoring module 311 and a charging management circuit 312, where the battery voltage monitoring module 311 is configured to detect the voltage of the battery, and the charging management circuit 312 is configured to perform charging control on the battery.
The main control circuit 4 may include a charging coordination management module 41, where the charging coordination management module 41 is connected to the charging management circuit 312, and is configured to send a charging signal to the charging management circuit 312 when an output voltage of a battery when the printing device is in a printing state is lower than a set threshold, where the charging management circuit 312 charges the battery when a subsequent printing device is in a non-printing state. When the charge level of the battery reaches the set value, the charge coordination management module 41 may control the charge management circuit 312 to stop charging. By the method, the charging behavior of the battery can be controlled, so that overcharge is prevented, and the service life of the battery is prolonged.
In addition, the main control circuit 4 may be connected to the print module 5, and configured to send a control signal to the print module 5. The main control circuit 4 may also be connected to the power management circuit 3, and configured to send the operating mode information of the printing apparatus to the power management circuit 3.
In one embodiment, the first electrical components of the print module 5 include a print driving circuit 51, a print driving mechanism 52 and a heat generating mechanism 53, which are required to operate at a first output voltage; the heating mechanism 53 may be a print head heating plate.
The second electrical component of the print module 5 comprises a print head control circuit 54 that needs to operate at a second output voltage; the print head control circuit 54 is connected to the heat generating mechanism 53, and configured to send a control signal to the heat generating mechanism 53.
In an embodiment of the present invention, the first power supply circuit 1 is connected to a USB interface, and can be connected to an external power supply module through the USB interface; the power module 2 is a battery supporting high-rate discharge current. Of course, the connection interface of the first power supply circuit 1 may also be other interfaces, such as a microsub interface and a Type-C interface, which may be used as a form of a USB interface; in addition, other interfaces that can provide power as will be appreciated by those skilled in the art may also be provided.
In an embodiment of the invention, the output voltage of the power module is U1, the first supply current is I1; the power supply power of the first power supply circuit is W1. The power consumption required by the operation of a printing part in the printing device is W2, and the printing part comprises a driving mechanism and a printing head; the conversion efficiency of the boost control circuit is A; the power consumption required by the master control circuitry and the printhead logic signal processing circuitry is W3. The first current value setting module sets a first supply current I1 ═ W2/a + W3-W1)/U1.
FIG. 2 is a schematic diagram of the components of a printing apparatus according to an embodiment of the present invention; referring to fig. 2, in a usage scenario of the present invention, the present invention employs a charging management chip (a part of a power management circuit) with power path management and rich voltage and current detection functions. The USB interface of the upper computer supplies power to the whole system and also charges the lithium battery when the system is idle; the power supply module can comprise a lithium battery, and the lithium battery can be a 18650 power battery with 2600mAH, and supports high-rate discharge; for example, 4C about 10A or so. Of course, the power module may also select other power sources that support high-rate discharge.
The power management circuit may include: the battery charging system comprises a charging management module, a power path module, a battery core over-temperature protection module, a battery core short-circuit protection module, an input voltage and current detection module and a battery voltage and current detection module.
The output of the charging management chip is about 4.0V, the first path is connected to a boosting power supply chip (a part of a boosting control circuit), the voltage is boosted to 7.4V, and then the stepping motor driving chip is supplied with power, and meanwhile, the heating sheet of the thermal sensitive printing head is supplied with power; and the other path of the voltage-stabilizing circuit is connected to a low-dropout linear voltage regulator (serving as a voltage-reducing control circuit), outputs 3.3V and supplies power to a microcontroller unit (serving as a part of a main control circuit) and a printing head logic signal processing circuit.
When the thermal printer works, the working current of the heating sheet is about 2.4A, the power consumption of the stepping motor is 0.6A, the power consumption Pprt during printing is 7.4V (2.4+0.6) A is 22.2W, the conversion efficiency of the boost chip is about 90%, and the power consumption P1 during printing is 22.2/0.9 is 24.67W; the power consumption P2 of the other microcontroller and the logic signal of the printing head is 4.0V 300mA 1.2W; when printing, the total power consumption P0, which the USB and the lithium battery need to provide, is 24.67+ 1.2-25.87W, the power consumption Pusb, which the USB can provide, is 5V × 500 mA-2.5W, the instantaneous power consumption Pbatt, which the lithium battery needs to provide, is 25.87-2.5-23.37W, the discharge current Id, which the lithium battery needs to provide, when printing, is 23.37W/4.0V — 5.8425a, and the ordinary lithium battery cannot achieve such a large discharge current, so we select a 18650 power battery, support a high-rate discharge current, and a maximum discharge current of about 4C and about 10A is enough to meet the large current required when we print.
When the battery voltage is lower than the preset recharging battery voltage Vrechg, such as 3.8V, when the printer is not printing, the USB power supply can immediately charge the lithium battery, the charging efficiency is 93 percent, and the charging current Icharge is 5.0V 0.5A 93 percent/4.0V 0.58A. The total print time is calculated as follows: the printing speed is 100mm per second, the average length of each order is 300mm, 500-1000 orders are printed in one day, the total printing time T is 300mm/100 mm-1000 orders/60-50 minutes, and is less than one hour, which shows that charging can be carried out most of the day, charging can be carried out in the interval of stopping printing, and the battery is ensured to have enough capacity to support the printing of the subsequent order.
FIG. 3 is a circuit diagram of a charge control circuit according to an embodiment of the present invention; referring to fig. 3, in an embodiment of the invention, the power management circuit includes a charging control circuit; the charge control circuit includes: the MOS transistor comprises a first chip U1, a first MOS transistor Q1 and a second MOS transistor Q2.
The source S of the first MOS transistor Q1 is grounded, the gate G of the first MOS transistor Q1 is connected to an input voltage, and the drain D of the first MOS transistor Q1 is connected to the gate G of the second MOS transistor Q2 and the resistor R12, so as to control the second MOS transistor Q2; the drain electrode D of the second MOS tube is connected to the first third pin and the first fourth pin of the first chip U1 through circuits, and the source electrode S of the second MOS tube is connected to the power supply module through circuits to control charging and discharging of the power supply module.
In one embodiment, the charge control circuit further comprises a first inductor L1, a plurality of capacitors, and a plurality of resistors; the second zero pin SW of the first chip U1 is respectively connected to the first nine pin SW of the first chip U1, the first end of the second capacitor C2, the first end of the first inductor L1, the first six pin SYS of the first chip U1, the first five pin SYS of the first chip U1, the first end of the fourth capacitor C4, and the first end of the fifth capacitor C5.
A second pin BTST of the first chip U1 is connected with a second end of a second capacitor C2; the second pin REGN of the first chip U1 is connected to the first terminal of the third capacitor C3, and the second terminal of the third capacitor C3 is grounded.
A first four pin BAT pin of the first chip U1 is connected to a first three pin BAT pin of the first chip U1 and a drain of the second MOS transistor Q2, respectively, and a source of the second MOS transistor Q2 is connected to a first end of the first two-resistor R12 and a first end of the first three-resistor R13, respectively.
The grid electrode of the second MOS transistor Q2 is respectively connected with the second end of the first diode R12 and the drain electrode of the first MOS transistor Q1; the source electrode of the first MOS tube Q1 is grounded; the grid electrode of the first MOS tube Q1 is connected with a power supply voltage.
The first pin VAC of the first chip U1 is connected to the second fourth pin VBUS of the first chip U1 and the second end of the fourth resistor R4, respectively, and the first end of the fourth resistor R4 is connected to a power supply voltage.
A second third pin PMD pin of the first chip U1 is connected with a second end of a first capacitor C1, and a first end of the first capacitor C1 is grounded; the second pin PSEL of the first chip U1 is connected to the second end of the first resistor R11, and the first end of the first resistor R11 is grounded.
The third pin NPG of the first chip U1 is connected to a fifth resistor R5, the fourth pin STAT of the first chip U1 is connected to a sixth resistor R6, the fifth pin SCL of the first chip U1 is connected to a seventh resistor R7, the sixth pin SDA of the first chip U1 is connected to an eighth resistor R8, and the seventh pin NINT of the first chip U1 is connected to a ninth resistor R9.
The NCE pin of the ninth pin of the first chip U1 is connected to the second terminal of the tenth resistor R10, and the first terminal of the tenth resistor R10 is grounded. A first pin TS of the first chip U1 is respectively connected with a second end of a first resistor R1, a first end of a second resistor R2 and a first end of a third resistor R3; the second end of the second resistor R2 and the second end of the third resistor R3 are respectively grounded.
FIG. 4 is a circuit diagram of a boost control circuit according to an embodiment of the present invention; referring to fig. 4, in an embodiment of the present invention, the boost control circuit includes: the second chip U2, the second inductance L2, a plurality of capacitors and a plurality of resistors.
The VCC pin of the second chip U2 is connected to the second terminal of the eighth capacitor C8, and the first terminal of the eighth capacitor C8 is grounded. A VIN pin of the second chip U2 is respectively connected with a first end of a first fourth resistor R14, a first end of a sixth capacitor C6 and a first end of a second inductor L2; a second terminal of the sixth capacitor C6 is connected to ground.
The second end of the second inductor L2 is connected to the SW pin of the second chip U2 and the first end of the seventh capacitor C7, respectively, and the second end of the seventh capacitor C7 is connected to the BOOT pin of the second chip U2.
The VOUT pin of the second chip U2 is connected to the first end of the tenth capacitor C10, the first end of the first second capacitor C12, the first end of the first fifth capacitor C15, the first end of the first eighth resistor R18, and the first end of the first seventh capacitor C17, respectively.
The GND pin of the second chip U2, the second end of the tenth capacitor C10, the second end of the first two capacitor C12, the second end of the first five capacitor C15 and the second end of the first seven capacitor C17 are respectively grounded; the second end of the first eight resistor R18 is connected to the FB pin of the second chip U2 and the first end of the first nine resistor R19, respectively, and the second end of the first nine resistor R19 is grounded.
The COMP pin of the second chip U2 is respectively connected with a first end of a first capacitor C11 and a first end of a first seven resistor R17, and a second end of the first seven resistor R17 is connected with a first end of a first third capacitor C13; the second end of the first capacitor C11 and the second end of the first third capacitor C13 are grounded, respectively. The ILIM pin of the second chip U2 is connected to a first end of a first sixth resistor, and a second end of the first sixth resistor is grounded.
Referring to fig. 4, the voltage conversion circuit includes a third chip U3, capacitors, and resistors; the IN pin of the third chip U3 is respectively connected with the second end of the first fourth resistor R14, the first end of the ninth capacitor C9 and the first end of the first fifth resistor R15; a second end of the ninth capacitor C9 is grounded, and a second end of the first fifth resistor R15 is connected to the EN pin of the third chip U3; the GND pin of the third chip U3 is grounded. The BP/FB pin of the third chip U3 is connected with a first end of a first four-capacitor C14, and a second end of the first four-capacitor C14 is grounded; the OUT pin of the third chip U3 is connected to the first end of a first sixth capacitor C16 and the first end of a second zero resistor R20, respectively, and the second end of the first sixth capacitor C16 is grounded.
In a usage scenario of the present invention, referring to fig. 3 and 4, after the device is connected to the USB port of the upper computer, VBUS _5V supplies power to the whole device, and a part of electricity of the first chip U1 charges the 18650 lithium battery through the second MOS transistor Q2; meanwhile, the first chip U1 supplies power to the second chip U2 booster circuit through the first inductor L1, and the output of the second chip U2 supplies power to the printing head and the motor driving chip; the first chip U1 also supplies power to the third chip U3 (voltage reduction control circuit), and the output of the third chip U3 supplies power to system circuits such as a microprocessor.
The invention further discloses a power supply control system, which is connected with the power utilization part of the corresponding power utilization equipment; the power supply control system includes: the power supply device comprises a first power supply circuit 1, a power supply module 2 and a power supply management circuit 3. Reference is made to fig. 1 and the above description relating to the composition of the printing apparatus. The first power supply circuit 1 is connected with an external power supply module; the power management circuit 3 is respectively connected with the first power supply circuit 1 and the power module 2.
When the electric equipment is in a first state, the power supply module 2 serves as a second power supply circuit and supplies power to the power management circuit 3 together with the first power supply circuit 1; the power management circuit 3 outputs a supply voltage of a first output voltage to a first electrical component of the electrical device, and the power management circuit outputs a supply voltage of a second output voltage to a second electrical component of the electrical device; wherein the first output voltage is greater than the second output voltage.
When the electric equipment is in a second state, the power management circuit controls the first power supply circuit to charge the power module.
In an embodiment of the present invention, the power supply control system further includes a main control circuit 4, where the main control circuit 4 is configured to obtain a state of the electrical device, and send the obtained state data of the electrical device to the power management circuit 3.
In an embodiment of the present invention, the electric device is a printing device; the power utilization component of the printing equipment comprises a printing module, and the printing module comprises a printing driving circuit, a printing driving mechanism, a heating mechanism and a printing head control circuit. The first electric component comprises a printing driving circuit, a printing driving mechanism and a heating mechanism which need to work under a first output voltage; the second electrical component comprises printhead control circuitry required to operate at a second output voltage; the printing head control circuit is connected with the heating mechanism and used for sending a control signal to the heating mechanism. Of course, the electric equipment may be other electric equipment.
Of course, the same electric component may exist in the first type electric component and the second type electric component; for example, the first type of electrical component may include a print head, which mainly includes a heating mechanism (e.g., a heating plate) of the print head, and the second type of electrical component may also include a print head, which mainly includes a logic signal processing circuit of the print head.
The invention also discloses a printing equipment power supply control method, which comprises the following steps:
step S1, acquiring the state of the printing device;
step S2, providing power supply for the electric parts of the printing device according to the state of the printing device;
when the printing equipment is in a printing working mode, the power supply module is used as a second power supply circuit and supplies power to the power supply management circuit together with the first power supply circuit; the power management circuit outputs a supply voltage of a first output voltage to a first electric component of the printing module, and the power management circuit outputs a supply voltage of a second output voltage to a second electric component of the printing module and the main control circuit; wherein the first output voltage is greater than the second output voltage;
when the printing equipment is in a non-printing working mode, the power supply management circuit controls the first power supply circuit to charge the power supply module.
The invention further discloses a power supply control method, which comprises the following steps:
step S1, acquiring the state of the electric equipment;
step S2, providing power supply for the electric parts of the electric equipment according to the state of the electric equipment;
when the electric equipment is in a first state, the power supply module serves as a second power supply circuit and supplies power to the power management circuit together with the first power supply circuit; the power management circuit outputs a supply voltage of a first output voltage to a first electrical component of the electrical device, and the power management circuit outputs a supply voltage of a second output voltage to a second electrical component of the electrical device; wherein the first output voltage is greater than the second output voltage;
when the electric equipment is in a second state, the power management circuit controls the first power supply circuit to charge the power module.
In summary, the power supply control system and method, the printing device and the power supply control method thereof provided by the invention can realize the requirement of high peak current in the set working state of the electrical equipment such as the printer and the like through a convenient interface without configuring a power adapter. The invention reduces the cost of the whole machine, does not need the authentication of the adapter, reduces the authentication cost and simplifies the installation and wiring.
It should be noted that the present application may be implemented in software and/or a combination of software and hardware; for example, it may be implemented using Application Specific Integrated Circuits (ASICs), general purpose computers, or any other similar hardware devices. In some embodiments, the software programs of the present application may be executed by a processor to implement the above steps or functions. As such, the software programs (including associated data structures) of the present application can be stored in a computer-readable recording medium; such as RAM memory, magnetic or optical drives or diskettes, and the like. In addition, some steps or functions of the present application may be implemented using hardware; for example, as circuitry that cooperates with the processor to perform various steps or functions.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The description and applications of the invention herein are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Effects or advantages referred to in the embodiments may not be reflected in the embodiments due to interference of various factors, and the description of the effects or advantages is not intended to limit the embodiments. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention.
Claims (17)
1. A printing apparatus, characterized in that the printing apparatus comprises: the printing system comprises a first power supply circuit, a power supply module, a power supply management circuit, a main control circuit and a printing module;
the first power supply circuit is connected with the external power supply module and supplies power to power-using components of the printing equipment; the power management circuit is respectively connected with the first power supply circuit and the power module;
when the printing equipment is in a printing working mode, the power supply module is used as a second power supply circuit and supplies power to the power supply management circuit together with the first power supply circuit; the power management circuit outputs a supply voltage of a first output voltage to a first electric component of the printing module, and the power management circuit outputs a supply voltage of a second output voltage to a second electric component of the printing module and the main control circuit; wherein the first output voltage is greater than the second output voltage;
when the printing equipment is in a non-printing working mode, the power supply management circuit controls the first power supply circuit to charge the power supply module.
2. The printing apparatus of claim 1, wherein:
the power management circuit comprises a power management main control circuit and a boost control circuit, and the output end of the power management main control circuit is connected with the boost control circuit; the boost control circuit is used for boosting the voltage output by the power management main control circuit to the first output voltage;
the output of the boost control circuit is connected with the first electric component of the printing module and provides a first output voltage for the first electric component of the printing module.
3. The printing apparatus of claim 2, wherein:
the power management circuit further comprises a voltage conversion circuit, and the output end of the power management main control circuit is connected with the voltage conversion circuit; the voltage conversion circuit is used for converting the voltage output by the power management main control circuit into a second output voltage;
the output end of the voltage conversion circuit is connected with the second electrical component and the main control circuit of the printing module, and provides a second output voltage for the second electrical component and the main control circuit of the printing module.
4. The printing apparatus of claim 3, wherein:
the power supply module comprises a battery supporting high-rate discharge current;
the power management main control circuit comprises a battery voltage monitoring module and a charging management circuit, wherein the battery voltage monitoring module is used for detecting the voltage of a battery, and the charging management circuit is used for controlling the charging of the battery;
the main control circuit comprises a charging cooperation management module, the charging cooperation management module is connected with the charging management circuit and used for sending a charging signal to the charging management circuit when the output voltage of the battery is lower than a set threshold value when the printing equipment is in a printing state, and the charging management circuit charges the battery when the printing equipment is in a non-printing state.
5. The printing apparatus of claim 3, wherein:
the voltage conversion circuit comprises a low-voltage linear voltage stabilizing circuit and is used for converting the voltage output by the power management main control circuit into 3.3V voltage.
6. The printing apparatus of claim 1, wherein:
the main control circuit is connected with the printing module and used for sending a control signal to the printing module;
the main control circuit is connected with the power management circuit and used for sending the working mode of the printing equipment to the power management circuit.
7. The printing apparatus of claim 1, wherein:
the first electric component of the printing module comprises a printing driving circuit, a printing driving mechanism and a heating mechanism which need to work under a first output voltage;
the second electrical component of the print module comprises a print head control circuit required to operate at a second output voltage; the printing head control circuit is connected with the heating mechanism and used for sending a control signal to the heating mechanism.
8. The printing apparatus of claim 1, wherein:
the first power supply circuit is connected with a USB interface and can be connected with an external power supply module through the USB interface; the power module is a battery supporting high-rate discharge current.
9. The printing apparatus of claim 1, wherein:
the power management circuit comprises a charging control circuit; the charge control circuit includes: the circuit comprises a first chip U1, a first MOS transistor Q1 and a second MOS transistor Q2;
the source S of the first MOS transistor Q1 is grounded, the gate G of the first MOS transistor Q1 is connected to an input voltage, and the drain D of the first MOS transistor Q1 is connected to the gate G of the second MOS transistor Q2 and the resistor R12, so as to control the second MOS transistor Q2; the drain electrode D of the second MOS tube is connected to the first third pin and the first fourth pin of the first chip U1 through circuits, and the source electrode S of the second MOS tube is connected to the power supply module through circuits to control charging and discharging of the power supply module.
10. The printing apparatus of claim 9, wherein:
the charge control circuit further includes: a first inductor L1, a plurality of capacitors and a plurality of resistors;
the second zero pin SW pin of the first chip U1 is respectively connected with the first nine pin SW pin of the first chip U1, the first end of a second capacitor C2, the first end of a first inductor L1, the first six pin SYS pin of the first chip U1, the first five pin SYS pin of the first chip U1, the first end of a fourth capacitor C4 and the first end of a fifth capacitor C5;
a second pin BTST of the first chip U1 is connected with a second end of a second capacitor C2; a second pin REGN of the first chip U1 is connected to a first end of a third capacitor C3, and a second end of the third capacitor C3 is grounded;
a first pin VAC of the first chip U1 is respectively connected with a second four pin VBUS pin of the first chip U1 and a second end of a fourth resistor R4, and a first end of the fourth resistor R4 is connected with a power supply voltage;
a second third pin PMD pin of the first chip U1 is connected with a second end of a first capacitor C1, and a first end of the first capacitor C1 is grounded;
a second pin PSEL of the first chip U1 is connected with a second end of a first one-to-one resistor R11, and a first end of the first one-to-one resistor R11 is grounded;
the third pin NPG of the first chip U1 is connected to a fifth resistor R5, the fourth pin STAT of the first chip U1 is connected to a sixth resistor R6, the fifth pin SCL of the first chip U1 is connected to a seventh resistor R7, the sixth pin SDA of the first chip U1 is connected to an eighth resistor R8, and the seventh pin NINT of the first chip U1 is connected to a ninth resistor R9;
a ninth pin NCE of the first chip U1 is connected to a second terminal of a tenth resistor R10, and a first terminal of the tenth resistor R10 is grounded;
a first pin TS of the first chip U1 is respectively connected with a second end of a first resistor R1, a first end of a second resistor R2 and a first end of a third resistor R3; the second end of the second resistor R2 and the second end of the third resistor R3 are respectively grounded.
11. The printing apparatus of claim 2, wherein:
the boost control circuit includes: the second chip U2, a second inductor L2, a plurality of capacitors and a plurality of resistors;
the VCC pin of the second chip U2 is connected to the second end of the eighth capacitor C8, and the first end of the eighth capacitor C8 is grounded;
a VIN pin of the second chip U2 is respectively connected with a first end of a first fourth resistor R14, a first end of a sixth capacitor C6 and a first end of a second inductor L2; a second end of the sixth capacitor C6 is grounded;
a second end of the second inductor L2 is connected to a SW pin of a second chip U2 and a first end of a seventh capacitor C7, respectively, and a second end of the seventh capacitor C7 is connected to a BOOT pin of the second chip U2;
a VOUT pin of the second chip U2 is connected to a first end of a tenth capacitor C10, a first end of a first two-capacitor C12, a first end of a first five-capacitor C15, a first end of a first eight-resistor R18, and a first end of a first seven-capacitor C17, respectively;
the GND pin of the second chip U2, the second end of the tenth capacitor C10, the second end of the first two capacitor C12, the second end of the first five capacitor C15 and the second end of the first seven capacitor C17 are respectively grounded; a second end of the first eight resistor R18 is connected to the FB pin of the second chip U2 and a first end of a first nine resistor R19, respectively, and a second end of the first nine resistor R19 is grounded;
the COMP pin of the second chip U2 is respectively connected with a first end of a first capacitor C11 and a first end of a first seven resistor R17, and a second end of the first seven resistor R17 is connected with a first end of a first third capacitor C13; the second end of the first capacitor C11 and the second end of the first third capacitor C13 are respectively grounded;
the ILIM pin of the second chip U2 is connected to a first end of a first sixth resistor, and a second end of the first sixth resistor is grounded.
12. The printing apparatus of claim 3, wherein:
the voltage conversion circuit comprises a third chip U3, a plurality of capacitors and a plurality of resistors;
the IN pin of the third chip U3 is respectively connected with the second end of a first fourth resistor R14, the first end of a ninth capacitor C9 and the first end of a first fifth resistor R15; a second end of the ninth capacitor C9 is grounded, and a second end of the first fifth resistor R15 is connected to the EN pin of the third chip U3; the GND pin of the third chip U3 is grounded;
the BP/FB pin of the third chip U3 is connected with a first end of a first four-capacitor C14, and a second end of the first four-capacitor C14 is grounded; the OUT pin of the third chip U3 is connected to the first end of a first sixth capacitor C16 and the first end of a second zero resistor R20, respectively, and the second end of the first sixth capacitor C16 is grounded.
13. A power supply control system is connected with a power utilization component of a corresponding power utilization device; characterized in that the power supply control system comprises: the power supply device comprises a first power supply circuit, a power supply module and a power supply management circuit;
the first power supply circuit is connected with an external power supply module; the power management circuit is respectively connected with the first power supply circuit and the power module;
when the electric equipment is in a first state, the power supply module serves as a second power supply circuit and supplies power to the power management circuit together with the first power supply circuit; the power management circuit outputs a supply voltage of a first output voltage to a first electrical component of the electrical device, and the power management circuit outputs a supply voltage of a second output voltage to a second electrical component of the electrical device; wherein the first output voltage is greater than the second output voltage;
when the electric equipment is in a second state, the power management circuit controls the first power supply circuit to charge the power module.
14. The power supply control system according to claim 13, characterized in that:
the power management circuit comprises a power management main control circuit and a boost control circuit, and the output end of the power management main control circuit is connected with the boost control circuit; the boost control circuit is used for boosting the voltage output by the power management main control circuit to the first output voltage;
the output of the boost control circuit is connected with the first electric component of the printing module and provides a first output voltage for the first electric component of the printing module.
15. The power supply control system according to claim 14, characterized in that:
the power management circuit further comprises a voltage conversion circuit, and the output end of the power management main control circuit is connected with the voltage conversion circuit; the voltage conversion circuit is used for converting the voltage output by the power management main control circuit into a second output voltage;
the output end of the voltage conversion circuit is connected with the second electrical component and the main control circuit of the printing module, and provides a second output voltage for the second electrical component and the main control circuit of the printing module.
16. A printing apparatus power supply control method, characterized by comprising:
step S1, acquiring the state of the printing device;
step S2, providing power supply for the electric parts of the printing device according to the state of the printing device;
when the printing equipment is in a printing working mode, the power supply module is used as a second power supply circuit and supplies power to the power supply management circuit together with the first power supply circuit; the power management circuit outputs a supply voltage of a first output voltage to a first electric component of the printing module, and the power management circuit outputs a supply voltage of a second output voltage to a second electric component of the printing module and the main control circuit; wherein the first output voltage is greater than the second output voltage;
when the printing equipment is in a non-printing working mode, the power supply management circuit controls the first power supply circuit to charge the power supply module.
17. A power supply control method, characterized by comprising:
step S1, acquiring the state of the electric equipment;
step S2, providing power supply for the electric parts of the electric equipment according to the state of the electric equipment;
when the electric equipment is in a first state, the power supply module serves as a second power supply circuit and supplies power to the power management circuit together with the first power supply circuit; the power management circuit outputs a supply voltage of a first output voltage to a first electrical component of the electrical device, and the power management circuit outputs a supply voltage of a second output voltage to a second electrical component of the electrical device; wherein the first output voltage is greater than the second output voltage;
when the electric equipment is in a second state, the power management circuit controls the first power supply circuit to charge the power module.
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| CN114312038B (en) | 2023-07-07 |
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