CN114362272A - Ultra-thin trinity power supply unit - Google Patents
Ultra-thin trinity power supply unit Download PDFInfo
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- CN114362272A CN114362272A CN202111061626.XA CN202111061626A CN114362272A CN 114362272 A CN114362272 A CN 114362272A CN 202111061626 A CN202111061626 A CN 202111061626A CN 114362272 A CN114362272 A CN 114362272A
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Abstract
The invention provides an ultrathin three-in-one power supply device. Including electric core, wireless charging coil, power supply port, planar transformer produces the electricity with the circuit board and is connected, on the embedding circuit board, wireless charging coil inlays on planar transformer, electric core is fixed in wireless charging coil avris, and the power supply end export meets the circuit board. The device integrates a charger, a mobile power supply and a wireless charging function, the product design is ultrathin, the output power is high, the output ports are multiple and different, and daily charging of all current consumer electronic products can be met.
Description
Technical Field
The invention relates to the technical field of power supply devices, in particular to an ultrathin three-in-one power supply device.
Background
The portable mobile power supply is used as an important branch of power conversion, and is widely used in various fields as an emergency and standby alternating current power supply due to the characteristics of stability, portability and environmental protection. In some special places, such as coal mines, the open air and places where electric energy cannot be normally supplied due to natural disasters such as ice disasters, flood disasters and earthquakes, the power supply device can be used as a standby power supply to supply power to equipment such as a communication system and medical equipment, so that smooth communication and normal work of the equipment such as the medical equipment are guaranteed.
The research direction of the portable power source focuses on daily use and business use, and realizes 5V voltage output for the purpose of supplying power to devices such as mobile phones. However, the mobile power supply devices on the market have the following disadvantages: (1) the portable power source device is large in size, large in size and inconvenient to carry. (2) And virtual charging, which is caused by low conversion rate of some mobile power supply devices. (3) The interface is few and can not carry out wireless charging, can only charge for the cell-phone, can not charge for other equipment.
Disclosure of Invention
The invention provides an ultrathin three-in-one power supply device, which is used for solving the problems that a mobile power supply device is too large in size, inconvenient to carry, too small in power supply capacity, incapable of charging equipment in time, few in power supply device output ports, and the same type of output ports cannot meet the requirement of charging more different equipment. The technical scheme is as follows:
an ultra-thin trinity power supply unit includes: the battery comprises a battery core, a wireless charging coil, a power supply port and a planar transformer, wherein the planar transformer is electrically connected with a circuit board and embedded into the circuit board, the wireless charging coil is embedded into the planar transformer, the battery core is fixed on the side of the wireless charging coil, and the outlet of the power supply port is connected with the circuit board.
As an embodiment in the present invention: the circuit board is also provided with an AC-DC conversion circuit and a secondary rectifying and filtering circuit; wherein the content of the first and second substances,
the AC-DC conversion circuit is externally connected with a mains supply and is used for converting the mains supply into direct current;
the secondary filter circuit is used for carrying out secondary rectification filtering on the converted current signal of the direct current to filter an alternating current signal;
as an embodiment in the present invention: the AC-DC conversion circuit further includes: the device comprises a planar transformer, a half-wave rectifying circuit, a filter circuit and a voltage stabilizing circuit.
The planar transformer is used for changing the voltage of alternating current commercial power.
The half-wave rectifier circuit utilizes the one-way conductivity of the diode, so that the voltage from the transformer can reach the load only in a half period, and the power frequency alternating current commercial power is converted into the pulsating direct current commercial power.
The filter circuit is used for filtering alternating current components in pulsating direct current for the first time, reducing the alternating current components and increasing the direct current components.
The voltage stabilizing circuit converts unstable direct current voltage into stable direct current voltage.
As an embodiment in the present invention: the planar transformer includes: a magnetic core, a coil winding;
the magnetic core adopts a small-sized E-type, RM-type or annular ferrite magnetic core, is usually made of high-frequency power ferrite materials, and has lower magnetic core loss at high frequency;
the coil winding is formed by winding a plurality of layers of printed circuit boards, and the winding or copper sheet is overlapped on the planar high-frequency iron core to form a magnetic loop of the transformer.
As an embodiment in the present invention: the voltage stabilizing circuit adjusts the duty ratio of the control circuit through voltage feedback under the condition of keeping the output frequency of the control circuit unchanged by controlling PWM (pulse width modulation), thereby achieving stable voltage.
As an embodiment in the present invention: the circuit board is also provided with a first DC-DC circuit and a second DC-DC circuit;
the first DC-DC circuit is used for transmitting one path of the received commercial power to the charge and discharge management chip to charge the battery cell after the voltage of the received commercial power is reduced, and transmitting the other path of the commercial power to the power supply port to charge the equipment.
The second DC-DC circuit is used for directly transmitting the received commercial power to the other power supply port after the received commercial power is subjected to voltage reduction.
As an embodiment in the present invention: the circuit board is also provided with a charge and discharge management chip, and the charge and discharge management chip comprises a charge function and a discharge function; wherein the content of the first and second substances,
the charging function is used for performing constant-voltage charging on the battery cell by reducing the input voltage of the mains supply voltage after receiving the mains supply of the first DC-DC circuit;
and the discharging function is used for discharging after the voltage of the battery cell is reversely boosted.
As an embodiment in the present invention: the circuit board is also provided with an unlimited charging output which comprises a wireless transmitting charging coil and a wireless charging receiving coil of the mobile phone; wherein the content of the first and second substances,
the wireless transmitting charging coil generates a magnetic field through the coil, the magnetic field generates current, and the current is sent to the equipment receiving end;
the mobile phone wireless charging receiving coil is used for receiving the current of the wireless transmitting charging coil;
through the coupling energy of the wireless transmitting and charging coil and the wireless charging and receiving coil of the mobile phone, the current output by the transmitting coil is converted into direct current to charge the mobile phone through the receiving and converting circuit.
As an embodiment in the present invention: the circuit board is also provided with a temperature sensor; the temperature sensor is arranged outside the battery cell and fixed and connected with the circuit board, and when the measured temperature of the battery cell rises to reach a preset maximum value, the commercial power is disconnected, so that the battery cell is cooled.
As an embodiment in the present invention: the power supply device comprises a dry filter screen, wherein the dry filter screen is arranged inside a power supply device shell and used for protecting a circuit board.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a structural diagram of an ultra-thin three-in-one power supply device in an embodiment of the invention.
Fig. 2 is a circuit logic distribution diagram of an ultra-thin three-in-one power supply device according to an embodiment of the invention.
Fig. 3 is an AC-DC conversion circuit diagram of an ultra-thin three-in-one power supply device in an embodiment of the invention.
Fig. 4 is a first component circuit of an output circuit diagram of an ultra-thin three-in-one power supply device according to an embodiment of the invention.
Fig. 5 is a second component circuit of an output circuit diagram of an ultra-thin three-in-one power supply device according to an embodiment of the invention.
Fig. 6 is a third component circuit of an output circuit diagram of an ultra-thin three-in-one power supply device according to an embodiment of the invention.
Fig. 7 is a fourth component circuit of an output circuit diagram of an ultra-thin three-in-one power supply device in an embodiment of the invention.
Fig. 8 is a fifth component circuit of an output circuit diagram of an ultra-thin three-in-one power supply device according to an embodiment of the invention.
Fig. 9 is a sixth component circuit of an output circuit diagram of an ultra-thin three-in-one power supply device in an embodiment of the invention.
Fig. 10 is a seventh component circuit of an output circuit diagram of an ultra-thin three-in-one power supply device in an embodiment of the invention.
Fig. 11 is a diagram of the output of the mobile power supply of the ultra-thin three-in-one power supply device in the embodiment of the invention.
Fig. 12 is a wireless charging/discharging diagram of an ultra-thin three-in-one power supply device according to an embodiment of the invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The invention discloses an ultrathin three-in-one power supply device, which is shown in figure 1 and comprises a battery cell (1), a wireless charging coil (2), a power supply port (3) and a planar transformer (4), wherein the planar transformer is electrically connected with a circuit board and is embedded in the circuit board, the wireless charging coil is embedded in the planar transformer, the battery cell is fixed on the side of the wireless charging coil, and the outlet of the power supply end is connected with the circuit board.
The working principle of the technical scheme is as follows:
a planar transformer: when AC mains voltage is applied to the primary winding, an AC current flows into the primary winding to generate an excitation effect, and an alternating magnetic flux is generated in the iron core, and the alternating magnetic flux not only passes through the primary winding, but also passes through the secondary winding, and respectively induces induced electromotive forces in the two windings. At this time, if the load of the secondary side and the external circuit is turned on, an alternating current flows out, and then electric energy is output.
Battery cell: the positive electrode of the cell is LiCoO2, a conductive agent and an adhesive, the slaughtering aluminum foil forms a positive plate, and the negative electrode is laminated graphite, the conductive agent and the adhesive coated on a copper foil base band. The reaction mechanism of the battery cell is that lithium ions are inserted and removed between the positive electrode and the negative electrode along with the progress of charging and discharging. Shuttle to and from the interior of the cell without the presence of metallic lithium.
Wireless coil that fills: the transmission of energy is finished by the continuous energy coupling of the coil, the system power time input end converts the communication commercial power into direct current through the full-bridge rectification circuit, or the 24V direct current end is used for directly supplying power to the system, and the direct current output after passing through the power supply handling module is converted into high-frequency communication power through the 2M active crystal oscillator inversion to supply a low-level winding. Energy is coupled through 2 inductance coils, and the current output by the secondary coil is converted into direct current to charge the battery through the receiving and converting circuit.
The power supply ports comprise a PD1 power supply port and a PD2 and USBA power supply port. PD power supply port: a high-definition digital display interface standard can be connected with a computer and a display and can also be connected with the computer and a home theater.
The beneficial effects of the above technical scheme are: the planar transformer has small volume and only 8mm of height. The number of turns of the winding is greatly less than that of the traditional transformer, the structure is more compact, the magnetic coupling is greatly superior to that of the traditional transformer, and the leakage reactance is less than 0.2%, so that the transformer can work at higher frequency and is beneficial to improving the power conversion efficiency. The compact core geometry limits the creation of hot spots, reduces heat dissipation, and thus allows for higher energy densities. Meanwhile, the heat dissipation condition of the transformer is greatly superior to that of the traditional transformer. Therefore, the volume and the weight of the planar transformer are greatly reduced, and the efficiency is higher. More importantly, the method provides a universal choice for the switch transformer in the switch power supply, and omits complicated calculation, material selection and transformer winding processes. The design is simplified and optimized, and meanwhile, the volume is reduced, and the cost is reduced. The placement and connection enable the space layout to be more reasonable and save more space.
As shown in fig. 2, when an alternating current mains supply is input, the alternating current mains supply passes through a rectification filter circuit, is transmitted to two DC-DC circuits for voltage reduction after being transformed by a planar transformer, the stable mains supply after voltage reduction is used for charging a battery through a charging and discharging management chip, meanwhile, the output of a power supply port is reduced to 5-20V for charging equipment, the charging and discharging management chip is used for charging the battery in a forward direction and discharging a load in a reverse direction, the voltage output by the DC-DC passes through a wireless charging chip, and when a mobile phone is received to enter, the mobile phone is charged through coil coupling;
the working principle of the technical scheme is as follows: after alternating current commercial power is input, alternating current of commercial power voltage after rectification and filtering is converted into stable direct current through AC-DC and is output, after the commercial power is transmitted to the DC-DC circuit, after the voltage reduction and conversion of the first DC-DC circuit, one path of the commercial power is transmitted to the charging and discharging management chip, the other path of the commercial power is transmitted to the power supply port for output, after the voltage reduction and conversion of the second DC-DC circuit, the commercial power is transmitted to the power supply port for output, and the quick charging of the battery core and the wireless charging and discharging of the battery core are realized through the charging and discharging management chip. The power ports include PD1, PD2 and USBA power ports.
The beneficial effects of the above technical scheme are: through the transformer, the PWM IC, the two DC-DC circuits, the charge and discharge management chip and the wireless charge output, the connection of the mobile power supply device is realized, and the power supply device can realize wired charging and wireless charging. The product has integrated charger, portable power source, and wireless function of charging, output is big, and the delivery outlet is many and diverse, can satisfy all current consumer electronics daily charges. The product design thickness is ultra-thin, the whole thickness does not exceed 20mm, the charger looks thinner than the same specification, and the whole space utilization rate reaches the utmost.
The circuit board is also provided with an AC-DC conversion circuit and a secondary rectifying and filtering circuit; as shown in fig. 3, in which,
the AC-DC conversion circuit is externally connected with a mains supply and is used for converting the mains supply into direct current;
the secondary filter circuit is used for carrying out secondary rectification filtering on the converted current signal of the direct current to filter an alternating current signal;
the working principle of the technical scheme is as follows:
a secondary rectification circuit: the diodes in the rectifier circuit have unidirectional conductivity. When the positive half cycle is carried out, the diode is conducted, and the positive half cycle of the sine wave is obtained on the load resistor. When the negative half cycle is carried out, the diode is conducted, and the negative half cycle of the sine wave is obtained on the load resistor. The positive and negative half cycles of the load resistor are synthesized to obtain unidirectional pulsating voltage in the same direction.
Secondary filter circuit: the waveform is adjusted to a stable direct current, and alternating current components in the pulsating direct current are filtered, so that the alternating current components are reduced, and the direct current components are increased.
The beneficial effects of the above technical scheme are: the AC-DC conversion circuit has small volume, light weight and smaller occupied space in the power supply device, so that the power supply device is lighter, the AC-DC conversion circuit has higher anti-interference performance and wider output voltage range; the secondary rectifying and filtering circuit converts and filters the commercial power passing through the AC-DC conversion circuit again.
The AC-DC conversion circuit further includes: the device comprises a planar transformer, a half-wave rectifying circuit, a filter circuit and a voltage stabilizing circuit.
The planar transformer is used for changing the voltage of alternating current commercial power.
The half-wave rectifier circuit utilizes the one-way conductivity of the diode, so that the voltage from the transformer can reach the load only in a half period, and the power frequency alternating current commercial power is converted into the pulsating direct current commercial power.
The filter circuit is used for filtering alternating current components in pulsating direct current for the first time, reducing the alternating current components and increasing the direct current components.
The voltage stabilizing circuit converts unstable direct current voltage into stable direct current voltage.
The working principle of the technical scheme is as follows: when the primary side of the transformer applies an alternating voltage U1 and the current flowing through the primary winding is I1, the current can generate alternating magnetic flux in the iron core, so that the primary winding and the secondary winding are in electromagnetic connection.
A half-wave rectifier circuit inside the AC-DC conversion circuit: by utilizing the unidirectional conductivity of the diode, the voltage from the transformer can reach the load only in a half period, so that the power frequency alternating current is converted into the pulsating direct current.
The single-phase pulsating direct-current voltage obtained by rectifying the filter circuit in the AC-DC conversion circuit contains alternating-current components with various frequencies, and cannot be directly adopted, and the filter circuit is required to be arranged in order to filter or inhibit alternating-current components to obtain smooth direct-current voltage. The filter circuit is placed directly behind the rectifier circuit, and is used for filtering out ripples in the rectified output voltage, and generally consists of reactance elements, such as a capacitor C connected in parallel with two ends of a load resistor or an inductor L connected in series with the load, and various complex filter circuits formed by combining capacitors and inductors.
The voltage stabilizing circuit in the AC-DC conversion circuit adopts the simplest unadjustable serial voltage stabilizing circuit, ensures that the output voltage changes within the range of +/-2V, and consists of an adjusting tube VT4, a current limiting resistor R4 and a voltage stabilizing diode VD 15. When the output voltage is increased due to some reason, due to the voltage stabilizing effect of the VD15, Ube of the VT4 is increased (the emitter electrode potential is changed to be negative), so that the base electrode current of the VT4 is reduced, the internal resistance of the adjusting tube is increased, the tube voltage drop is increased, and the output voltage is reduced; likewise, when the output voltage drops, the output voltage is raised again by the opposite change, so that the output voltage is kept basically constant.
The beneficial effects of the above technical scheme are: the AC-DC conversion circuit has high efficiency, small volume and small occupied area. The AC-DC conversion circuit has perfect protection measures and has protection for the problems of undervoltage, overcurrent, short circuit and the like; the AC-DC module power supply has good electromagnetic compatibility, reliable operation and no pollution to a power grid; the AC-DC conversion circuit has an excellent current sharing control mode, can realize uniform load distribution, and prolongs the service life of the module. The AC-DC conversion circuit has stable performance and high reliability, so the AC-DC conversion circuit has wider application range; the half-wave rectification circuit has large output ripple, low power utilization rate and simple circuit. Compared with the conventional transformer, the planar transformer has the advantages that the size of the magnetic core is greatly reduced, and particularly, the height is reduced to the maximum. This feature has considerable attraction to power supply equipment where space is severely restricted, and thus can be the preferred magnetic element in many power supply equipment. The voltage stabilizing circuit has the characteristics of high voltage stabilizing precision, stable and reliable work, simple surrounding circuit, small volume, light weight and the like. The planar transformer and the voltage stabilizing circuit have the advantages of higher power density, higher efficiency, lower leakage inductance, better heat dissipation and lower cost of the power supply device.
As shown in fig. 4-10, the circuit board is further provided with a first DC-DC circuit and a second DC-DC circuit;
the first DC-DC circuit is used for transmitting one path of the received commercial power to the charge and discharge management chip to charge the battery cell after the voltage of the received commercial power is reduced, and transmitting the other path of the commercial power to the power supply port to charge the equipment;
and the second DC-DC circuit is used for transmitting the received commercial power to the power supply port after the voltage of the commercial power is reduced.
The working principle of the technical scheme is as follows: when the switch S is closed, the VD diode bears negative voltage and is turned off, the inductor is charged, 21V mains supply flows in the forward direction, and the current value of the first DC-DC circuit shows an exponential rising trend. When the switch S is disconnected, the VD diode plays a role of follow current, the inductor starts to discharge, the current gradually drops, and the current returns to the other end of the inductor through the load and the diode, so that power is supplied for a short time, and the mains supply is reduced. The mains supply which is reduced to 5-20V is transmitted through PD2 and USBA port for output. After the second DC-DC circuit is subjected to voltage reduction, one path of the second DC-DC circuit transmits the commercial power to the charge and discharge management chip to charge the battery cell, and the other path of the second DC-DC circuit charges the equipment through the PD1 port.
The beneficial effects of the above technical scheme are: the DC-DC output circuit is adopted to step down the DC mains supply, the efficiency is high, the reliability is good, and the electromagnetic radiation interference is generated by the quick and instantaneous change of voltage and current waveforms in the circuit. The synchronous switch control IC can directly drive the external MOS, provides wide-voltage, large-current and high-power high-efficiency DC-DC conversion for a user system, and flexibly supports various high-voltage and high-power applications; the synchronous switch conversion IC provides a high-efficiency power supply conversion scheme with high integration level, high density and simplified peripheral devices for a system by integrating the power MOS of the ultra-low Rdson.
As shown in figures 4-10, the DC-DC output circuit of the ultrathin three-in-one power supply device is also provided with a BUCK circuit. The DC-DC converter is divided according to the structural form of a power switch and can be divided into a non-isolated type (a main circuit does not have a high-frequency transformer), an isolated type and the like, wherein the non-isolated type DC converter has three basic circuit topologies, and one of the three basic circuit topologies is a Buck (Buck) type.
The working principle of the technical scheme is as follows: the main components of the BUCK circuit comprise a switch tube T, a freewheeling diode D, an energy storage inductor L, an output filter capacitor C and a load resistor R.
When the control circuit outputs a high level pulse, the switch is switched on, the anode voltage of the freewheeling diode D is zero, the cathode voltage is the direct-current power supply voltage, therefore, the reverse direction is cut off, and the current flowing on the switch flows through the inductor L to supply power to the load R; at the moment, the current in the L gradually rises, self-induction potentials with positive left end and negative right end are generated at the two ends of the L to prevent the current from rising, the L converts the electric energy into magnetic energy to be stored, after the time ton, the control circuit pulse is in a low level, the switch is switched off, but the current in the L cannot change suddenly, the self-induction potentials with positive left end and negative right end generated at the two ends of the inductor L prevent the current from falling, so that the D is switched on in a forward bias mode, the current in the L forms a loop through the D, the current value gradually falls, and the magnetic energy stored in the L is converted into the electric energy to be released and supplied to the load R. After the time toff, the control circuit pulses to turn on the switching tube, and the process is repeated, and the filter capacitor C is used for reducing the pulsation of the output voltage.
The beneficial effects of the above technical scheme are: the switching tube of the BUCK circuit is equivalent to a PWM modulator, proper duty ratio is set, the obtained voltage is square waves, the diode provides a loop for the filter in the state that the switch is turned off, the obtained output voltage and the output current are filtered, the inductor is used for resisting the change of the current, the capacitor is used for resisting the change of the voltage, and stable output voltage and output current can be obtained.
As shown in fig. 11, the circuit board is further provided with a charge and discharge management chip, and the charge and discharge management chip SC8813 includes a charging function and a discharging function; wherein the content of the first and second substances,
the charging function is used for performing constant-voltage charging on the battery cell by reducing the input voltage of the mains supply voltage after receiving the mains supply of the first DC-DC circuit;
and the discharging function is used for discharging after the voltage of the battery cell is reversely boosted.
The working principle of the technical scheme is as follows: the SC8813 chip is a buck charging controller with an I2C interface and supports the reverse boost discharging operation of the battery. The lithium battery can support a very wide input and output voltage range, and is suitable for 1-4 lithium battery applications.
In the charging mode, the SC8813 efficiently completes the battery charging by dropping the input voltage higher than the battery voltage. SC8813 supports sophisticated charge cycle management including: trickle charge, constant current charge, and constant voltage charge. In the discharging mode, the SC8813 can perform reverse boosting discharge with high efficiency, and the output voltage can reach 36V at most. The SC8813 integrates an I2C interface so that a user can easily select a charge/discharge mode and program input current limit values, output current limit values, and output voltages through I2C. It also supports DP/DM charging handshake, adapter access detection, load access detection and low current detection. And it has integrated inside it a PMOS driver that can be used for external power path management, an open drain output for general control. The SC8813 has perfect protection including under-voltage locking, over-voltage protection, over-current protection, short circuit warning, over-temperature protection and the like, thereby ensuring safety under various abnormal conditions. SC8813 provides a 32-pin 4X4 QFN package. When the commercial power of 5-20V of the second DC-DC circuit is received, the input voltage of the commercial power is reduced, the battery cell is charged at a constant voltage, in a discharging mode, the output voltage can reach 36V at most through reverse boosting and discharging, and the input current limiting value, the output current limiting value and the output voltage can be set through 12C programming.
The beneficial effects of the above technical scheme are: through the charge and discharge management chip, not only can realize efficient charge and discharge, still possess perfect protection, including functions such as undervoltage locking, overvoltage protection, overcurrent protection, short circuit warning and excess temperature protection to guarantee the safety under the various abnormal conditions.
As shown in FIG. 11, the model of the charging and discharging management chip is SC 8813.
As shown in fig. 12, the circuit board is further provided with a charge and discharge management chip, and the charge and discharge management chip includes a charging function and a discharging function; wherein the content of the first and second substances,
the charging function is used for performing constant-voltage charging on the battery cell by reducing the input voltage of the mains supply voltage after receiving the mains supply of the first DC-DC circuit;
and the discharging function is used for discharging after the voltage of the battery cell is reversely boosted.
The working principle of the technical scheme is as follows: through near-field induction, the wireless charging equipment conducts energy to the charging terminal equipment, and the terminal equipment converts the received energy into electric energy to be stored in a battery of the equipment. The principle of energy conduction is inductive coupling, an exposed conductive interface can be guaranteed, messy transmission lines among devices can be omitted, and the electric toothbrush is safer for electronic devices which are often in contact with conductive media such as liquid.
The beneficial effects of the above technical scheme are: the technology content is high, the operation is convenient, and relatively long-distance wireless energy conversion can be implemented. Wireless charging and wired charging are combined, and more devices can be charged simultaneously.
The circuit board is also provided with a temperature sensor; the temperature sensor is arranged outside the battery cell and fixed and connected with the circuit board, and when the measured temperature of the battery cell rises to reach a preset maximum value, the commercial power is disconnected, so that the battery cell is cooled.
The working principle of the technical scheme is as follows: the temperature sensor comprises a temperature measuring piece, an electronic tag and metal.
Temperature measurement: the temperature change of the battery core is sensed, and the shape memory type material and the product with the initial shape can be recovered to the initial shape through the treatment of external condition stimulation means such as heating and the like after being deformed and fixed.
The temperature measuring piece expands along with the rise of the temperature monotonously and drives the metal plate to rise monotonously to be pulled into the distance between the metal plate and the electronic tag. When the preset temperature is reached, the power supply device cuts off the input of the commercial power,
the top metal plate rises monotonously and changes the distance between the top metal plate and the electronic tag. The signal emitted by the electronic tag is changed, so that the temperature of the battery core is deduced by measuring the signal intensity.
The beneficial effects of the above technical scheme are: the conventional temperature sensor is high in temperature detection accuracy and has a wide measurement range. The disadvantages are high development cost and reliability of the chip to be considered. And the power consumption is very large, often reaches several mW or even higher, and the reading distance of the tag is below 1 meter, so the structure of an analog-to-digital sensor (ADC) is obviously not suitable for a passive RFID tag chip. For the active/semi-active RFID tag approach, the cost of the sensor is increased due to the addition of the battery. Meanwhile, the size is large, and the installation is limited. But this device is low-cost, convenient to detect, and is small, easily installs and among the ultra-thin power supply unit.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The utility model provides an ultra-thin trinity power supply unit which characterized in that includes: the battery comprises a battery cell (1), a wireless charging coil (2), a power supply port (3) and a planar transformer (4), wherein the planar transformer is electrically connected with a circuit board and embedded into the circuit board, the wireless charging coil is embedded into the planar transformer, the battery cell is fixed on the side of the wireless charging coil, and the outlet of a power supply end is connected with the circuit board.
2. The ultra-thin three-in-one power supply device as claimed in claim 1, wherein the circuit board is further provided with an AC-DC conversion circuit and a secondary rectifying and filtering circuit; wherein the content of the first and second substances,
the AC-DC conversion circuit is externally connected with a mains supply and is used for converting the mains supply into direct current;
and the secondary filter circuit is used for performing secondary rectification filtering on the converted current signal of the direct current to filter an alternating current signal.
3. The ultra-thin three-in-one power supply device as claimed in claim 2, wherein the AC-DC converter circuit further comprises: the power supply comprises a planar transformer, a half-wave rectifying circuit, a filter circuit and a voltage stabilizing circuit;
the planar transformer is used for changing the voltage of alternating current commercial power;
the half-wave rectifier circuit utilizes the one-way conductivity of the diode, so that the voltage from the transformer can reach a load only in a half cycle, and the power frequency alternating current commercial power is converted into pulsating direct current commercial power;
the filter circuit is used for filtering alternating current components in pulsating direct current for the first time, reducing the alternating current components and increasing the direct current components;
the voltage stabilizing circuit converts unstable direct current voltage into stable direct current voltage.
4. The ultra-thin three-in-one power supply device as claimed in claim 3, wherein the planar transformer comprises: a magnetic core, a coil winding;
the magnetic core adopts a small-sized E-type, RM-type or annular ferrite magnetic core, is usually made of high-frequency power ferrite materials, and has lower magnetic core loss at high frequency;
the coil winding is formed by winding a plurality of layers of printed circuit boards, and the winding or copper sheet is overlapped on the planar high-frequency iron core to form a magnetic loop of the transformer.
5. The ultra-thin three-in-one power supply device as claimed in claim 3, wherein the voltage regulator circuit adjusts the duty ratio thereof by voltage feedback under the condition that the output frequency of the control circuit is not changed by controlling PWM (pulse width modulation), thereby achieving a stable voltage.
6. The ultra-thin three-in-one power supply device as claimed in claim 1, wherein a first DC-DC circuit and a second DC-DC circuit are further disposed on the circuit board;
the first DC-DC circuit is used for transmitting one path of the received commercial power to the charge and discharge management chip to charge the battery cell after the voltage of the received commercial power is reduced, and transmitting the other path of the commercial power to the power supply port to charge the equipment.
The second DC-DC circuit is used for directly transmitting the received commercial power to the other power supply port after the received commercial power is subjected to voltage reduction.
7. The ultra-thin three-in-one power supply device as claimed in claim 1, wherein a charge and discharge management chip is further disposed on the circuit board, and the charge and discharge management chip includes a charge function and a discharge function; wherein the content of the first and second substances,
the charging function is used for performing constant-voltage charging on the battery cell by reducing the input voltage of the mains supply voltage after receiving the mains supply of the first DC-DC circuit;
and the discharging function is used for discharging after the voltage of the battery cell is reversely boosted.
8. The ultra-thin three-in-one power supply device as claimed in claim 1, wherein the circuit board is further provided with an infinite charging output comprising a wireless transmitting charging coil and a wireless charging receiving coil of a mobile phone; wherein the content of the first and second substances,
the wireless transmitting charging coil generates a magnetic field through the coil, the magnetic field generates current, and the current is sent to the equipment receiving end;
the mobile phone wireless charging receiving coil is used for receiving the current of the wireless transmitting charging coil;
through the coupling energy of the wireless transmitting and charging coil and the wireless charging and receiving coil of the mobile phone, the current output by the transmitting coil is converted into direct current to charge the mobile phone through the receiving and converting circuit.
9. The ultra-thin three-in-one power supply device as claimed in claim 1, wherein a temperature sensor is further disposed on the circuit board;
the temperature sensor is arranged outside the battery cell and fixed and connected with the circuit board, and when the measured temperature of the battery cell rises to reach a preset maximum value, the commercial power is disconnected, so that the battery cell is cooled.
10. The ultra-thin three-in-one power supply device of claim 1, comprising: and the drying filter screen is arranged inside the power supply device shell and used for protecting the circuit board.
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| CN202111061626.XA CN114362272A (en) | 2021-09-10 | 2021-09-10 | Ultra-thin trinity power supply unit |
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| CN202111061626.XA CN114362272A (en) | 2021-09-10 | 2021-09-10 | Ultra-thin trinity power supply unit |
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Application publication date: 20220415 |