CN211296335U - Wireless energy transfer device for flexible lithium battery - Google Patents
Wireless energy transfer device for flexible lithium battery Download PDFInfo
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- CN211296335U CN211296335U CN201921877028.8U CN201921877028U CN211296335U CN 211296335 U CN211296335 U CN 211296335U CN 201921877028 U CN201921877028 U CN 201921877028U CN 211296335 U CN211296335 U CN 211296335U
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- energy transfer
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Abstract
The utility model discloses a wireless energy transfer device facing to a flexible lithium battery, which adopts a transmitting coil and a flexible receiving coil to be connected in a non-contact magnetic coupling resonance mode to realize the wireless energy transfer function; the secondary receiving circuit, the rectifier and the charging control circuit are integrally designed on the circuit board, the circuit board is made of polyimide materials as base materials and can be bent and folded along any direction, so that the secondary receiving circuit can be well connected with a flexible energy storage device such as a flexible lithium battery, and the flexible mechanical performance of the secondary receiving circuit, the rectifier and the charging control circuit is not influenced; the utility model discloses a signal generator produces specific high frequency alternating current, and former limit transmitting circuit output is provided with adjustable inductance to adjust the reactive power matching circuit resonance, make and follow the active power of signal generator output is the biggest.
Description
Technical Field
The utility model relates to a new technical field of electrician, in particular to wireless power transmission device who has flexible receiving terminal towards flexible lithium cell.
Background
Wireless energy transfer technology has received increasing attention in recent years because it implements a reliable and convenient non-contact power supply manner, and wireless energy transfer is an inevitable trend in its development, particularly in the field of portable electronic devices.
The rapid development of flexible electronic products puts higher and higher requirements on energy supply systems of the flexible electronic products, the current charging mode of a flexible battery in the flexible electronic product still adopts a plug-in rigid charging mode, so that the flexible performance of the flexible battery is damaged, and the energy supply mode corresponding to the flexible battery becomes a bottleneck problem at present because the flexible equipment can be deformed at will.
Therefore, a wireless energy transfer device for a flexible lithium battery is needed to solve the existing technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the not enough of above-mentioned prior art, the utility model aims at providing a towards flexible lithium cell's wireless biography can device, the wireless charging circuit that utilizes wireless biography can mode to realize realizes providing the energy to flexible energy storage device, utilizes the characteristics of the flexibility and the miniaturization of wireless biography can device, matches the material performance characteristics of flexible equipment and flexible battery well to the realization is flexible mobile terminal energy supply.
The utility model discloses a realize through following technical scheme.
A wireless energy transfer device facing a flexible lithium battery comprises a primary side transmitting circuit and a secondary side receiving circuit; the primary side transmitting circuit is used for generating electromagnetic waves under the excitation of high-frequency alternating current; the secondary side receiving circuit is used for receiving electromagnetic wave form energy transmitted by the primary side transmitting circuit and generating high-frequency alternating current; the rear end of the secondary side receiving circuit is provided with a rectifier and a charging control circuit; the secondary side receiving circuit, the rectifier and the charging control circuit are integrally designed on a circuit board, and the circuit board is made of polyimide materials as base materials.
Furthermore, the device also comprises a signal generator arranged at the front end of the primary side transmitting circuit, wherein the signal generator is used for providing high-frequency alternating current for the primary side transmitting circuit.
Further, a direct current power supply and four PWM wave-controlled transistors are arranged on the signal generator; the four PWM wave-controlled transistors form a low-power full-bridge inverter circuit; the direct current power supply supplies power to the full-bridge inverter circuit; by controlling the on-off of the four PWM wave-controlled transistors, the output current of the direct current power supply generates a high-frequency current with a specific frequency after passing through a full-bridge inverter circuit.
Furthermore, the output end of the full-bridge inverter circuit is provided with an adjustable inductor for adjusting the resonance of the reactive power matching circuit, so that the active power output from the signal generator is the maximum.
Furthermore, the primary side transmitting circuit comprises a high-frequency alternating current capacitor element and a transmitting coil matched with the high-frequency alternating current capacitor element; under the specific high-frequency alternating current generated by the signal generator, the inductance value of the transmitting coil and the capacitance value of the high-frequency alternating current capacitive element are in a resonance condition, and under the corresponding high-frequency alternating current, the transmitting coil is excited to be in a resonance state, and a high-frequency electromagnetic field with the same frequency as the current of the signal generator is transmitted.
Further, the inductance value of the adjustable inductor is set to be in a resonance state with the capacitance value of the high-frequency alternating current capacitance element, thereby stabilizing the high-frequency alternating current flowing in the transmitting coil.
Further, the secondary side receiving circuit comprises a flexible receiving coil and a coupling alternating current capacitance element matched with the flexible receiving coil for resonance; the flexible receiving coil and the capacitive element have their corresponding inductance and capacitance values set to be in resonance at the frequency of the signal generator.
Furthermore, the rectifier is a full-bridge rectifying circuit consisting of four same high-frequency Schottky diodes, and a filter capacitor matched with the high-frequency condition is additionally arranged to stably output direct current.
Further, the charge control circuit includes a first resistor, a second resistor, and a control circuit; the first resistor is connected with the second resistor in series, and the delivery end of the first resistor is electrically connected with the rectifier; the control circuit is electrically connected to the first and second resistors.
Furthermore, the control circuit comprises a buck-boost converter and a charging control chip; the charging control chip collects and detects the voltage at two ends of the load flexible lithium battery and the current condition supplied to the flexible lithium battery, and accordingly the control and regulation of the output voltage and the output current are realized by controlling the buck-boost converter.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1) the utility model adopts the connection of the transmitting coil and the flexible receiving coil in a non-contact magnetic coupling resonance mode to realize the wireless energy transfer function;
2) the secondary receiving circuit, the rectifier and the charging control circuit are integrally designed on the circuit board, the circuit board is made of polyimide materials as base materials and can be bent and folded along any direction, so that the secondary receiving circuit can be well connected with a flexible energy storage device such as a flexible lithium battery, and the flexible mechanical performance of the secondary receiving circuit, the rectifier and the charging control circuit is not influenced;
3) the utility model generates specific high-frequency alternating current through the signal generator; the output end of the primary side transmitting circuit is provided with an adjustable inductor to adjust the resonance of the reactive power matching circuit so as to maximize the active power output from the signal generator;
4) the utility model generates high frequency alternating current by the excited flexible receiving coil, and the high frequency alternating current is rectified into stable direct current by the full-bridge rectifying circuit to provide power for the charging control circuit; and then the charging control circuit controls the output voltage and current according to the electric quantity condition of the flexible lithium battery at the detection and collection load end, so that the flexible lithium battery is charged according to a standard charging curve.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of the system structure of the present invention;
FIG. 2 is a system circuit diagram of the present invention;
fig. 3 is a circuit diagram of the charging control circuit of the present invention.
In the figure: 1. a signal generator; 2. a primary side transmission circuit; 3. a secondary side receiving circuit; 4. a rectifier; 5. a charge control circuit; 11. a direct current power supply; 12. a PWM wave-controlled transistor; 13. an adjustable inductance; 21. a high-frequency alternating current capacitance element; 22. a transmitting coil; 31. a flexible receiving coil; 32. a coupling AC capacitive element; 41. a high frequency Schottky diode; 42. a filter capacitor; 51. a first resistor; 52. A second resistor; 53. a buck-boost converter; 54. a charging control chip; 55. a first controllable switch; 56. a first data output port; 57. a second controllable switch; 58. a second data output port.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
As shown in fig. 1 to 2, a wireless energy transfer device facing a flexible lithium battery comprises a signal generator 1, a primary side transmitting circuit 2, a secondary side receiving circuit 3, a rectifier 4 and a charging control circuit 5;
the signal generator 1 is used for generating high-frequency alternating current; the primary side transmitting circuit 2 is used for generating electromagnetic waves under the excitation of high-frequency alternating current generated by the signal generator 1 and transmitting the energy to the secondary side receiving circuit 3; the rectifier 4 is connected to the output end of the secondary side receiving circuit 3; the secondary side receiving circuit 3 outputs alternating current voltage with determined amplitude, the alternating current voltage is rectified by the rectifier 4, the output direct current voltage can be constant within a certain load change range, and then the current is supplied to a flexible load, namely a flexible lithium battery, through the charge control circuit 5.
The signal generator 1 is provided with a direct current power supply 11, a PWM (pulse width modulation) wave control transistor 12 and an adjustable inductor 13 matched with output power adjustment;
the four PWM wave-controlled transistors 12 form a low-power full-bridge inverter circuit;
the direct current power supply 11 supplies power to the full-bridge inverter circuit;
by controlling the on-off of the four PWM wave-controlled transistors 12, the output current of the direct current power supply 11 can generate a high-frequency current with a specific frequency required by the device after passing through the full-bridge inverter circuit;
the frequency of the middle-high frequency current in the utility model can be set to be in the range of 20kHz-2MHz according to the condition of other circuit parameters.
The output end of the full-bridge inverter circuit is provided with an adjustable inductor 13 for adjusting the resonance of the reactive power matching circuit, so that the active power output from the signal generator 1 is the maximum.
The primary side transmitting circuit 2 comprises a high-frequency alternating current capacitor element 21 and a transmitting coil 22 matched with the high-frequency alternating current capacitor element;
under a specific high-frequency alternating current generated by the signal generator 1, the inductance value of the transmitting coil 22 and the capacitance value of the high-frequency alternating current capacitive element 21 are in accordance with a resonance condition, so that under a corresponding high-frequency alternating current, the transmitting coil 22 is excited in a resonance state, and a high-frequency electromagnetic field having the same frequency as the current of the signal generator 1 is transmitted.
The inductance value of the adjustable inductor 13 should also be set to be in resonance with the capacitance value of the high-frequency ac capacitive element 21, so as to stabilize the high-frequency ac current flowing in the transmitting coil 22;
according to the biot-sakaval law in electromagnetism, when the amplitude of the alternating current in the transmitting coil 22 is constant, the amplitude of the magnetic field intensity of the corresponding excited electromagnetic field is also constant, so that the secondary side can excite stable alternating current, the amplitude of the output alternating voltage is constant, and the voltage stabilizing effect is achieved.
The secondary side receiving circuit 3 is used for receiving electromagnetic wave form energy emitted by the primary side coil and inducing high-frequency alternating current on the secondary side.
The secondary side receiving circuit 3 comprises a flexible receiving coil 31 and a coupling alternating current capacitance element 32 matched with the flexible receiving coil for resonance;
the signal generator 1 and the primary side transmitting circuit 2 can be regarded as a wireless energy transfer type transmitting end power supply of the secondary side receiving circuit 3, and the wireless energy transfer type transmitting end power supply has the overall function of generating a high-frequency electromagnetic field with specific frequency and transferring energy to a secondary side in the form of electromagnetic waves.
The flexible receiving coil 31 and the coupling ac capacitance element 32 inside the secondary receiving circuit 3 have their corresponding inductance and capacitance values set to be in resonance at the frequency of the signal generator 1.
The rectifier 4 is a full-bridge rectifier circuit composed of four identical high-frequency schottky diodes 41, and a filter capacitor 42 matched with the high-frequency condition is added to stably output direct current.
It is known from the above description that the secondary receiving circuit 3 outputs an ac voltage with a determined amplitude, so that after being rectified by the rectifier 4, the output dc voltage can be constant within a certain load variation range, i.e., the circuit topology is utilized to realize the function of voltage stabilization output.
As shown in fig. 3, the charge control circuit 5 includes a first resistor 51, a second resistor 52, and a control circuit;
the first resistor 51 is connected in series with a second resistor 52, the delivery end of which is electrically connected with the rectifier 4;
the control circuit is electrically connected to the first resistor 51 and the second resistor 52;
the control circuit comprises a BUCK-BOOST converter (BUCK-BOOST)53 and a charging control chip 54;
the direct current output from the rectifier 4 is first shunted by the first resistor 51 and the second resistor 52; the voltage is distributed in a certain proportion and then input into the charging control chip 54, so that the output voltage detection function is realized.
The charging control chip 54 collects and detects the voltage at the two ends of the loaded flexible lithium battery and the current supplied to the flexible lithium battery, and accordingly controls and regulates the output voltage and the current by controlling the buck-boost converter 53.
The charging control chip controls the on/off of the first external data output port 56 through the first controllable switch 55, and controls the on/off of the second data output port 58 through the second controllable switch 57.
The secondary receiving circuit 3, the rectifier 4 and the charging control circuit 5 are integrally designed on a circuit board, the circuit board is made of polyimide materials as base materials and can be bent and folded along any direction, and miniaturization, integration and flexibility of the circuit are achieved; and the flexible receiving coil 31 can be well matched with the flexible lithium battery, so that the flexible characteristic of the whole mechanical property can be still maintained after the flexible battery is connected with the corresponding wireless charging module.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not depart from the essence of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A wireless energy transfer device facing a flexible lithium battery is characterized by comprising a primary side transmitting circuit (2) and a secondary side receiving circuit (3); the primary side transmitting circuit (2) is used for generating electromagnetic waves under the excitation of high-frequency alternating current; the secondary side receiving circuit (3) is used for receiving electromagnetic wave form energy transmitted by the primary side transmitting circuit (2) and generating high-frequency alternating current; the rear end of the secondary side receiving circuit (3) is provided with a rectifier (4) and a charging control circuit (5); the secondary side receiving circuit (3), the rectifier (4) and the charging control circuit (5) are integrally designed on a circuit board, and the circuit board is made of polyimide materials as base materials.
2. The wireless energy transfer device facing the flexible lithium battery as recited in claim 1, characterized in that the device further comprises a signal generator (1) arranged at the front end of the primary side transmission circuit (2), wherein the signal generator (1) is used for providing high-frequency alternating current for the primary side transmission circuit (2).
3. The wireless energy transfer device facing the flexible lithium battery as claimed in claim 2, wherein the signal generator (1) is provided with a direct current power supply (11) and four PWM wave-controlled transistors (12); the four PWM wave-controlled transistors (12) form a low-power full-bridge inverter circuit; the direct current power supply (11) supplies power to the full-bridge inverter circuit; by controlling the on and off of the four PWM wave-controlled transistors (12), the output current of the direct current power supply (11) generates a high-frequency current with a specific frequency after passing through a full-bridge inverter circuit.
4. The wireless energy transfer device for the flexible lithium battery as claimed in claim 3, wherein the output end of the full-bridge inverter circuit is provided with an adjustable inductor (13) to adjust the resonance of the reactive power matching circuit, so that the active power output from the signal generator (1) is maximized.
5. The wireless energy transfer device facing the flexible lithium battery as recited in claim 4, characterized in that the primary side transmitting circuit (2) comprises a high frequency alternating current capacitor element (21) and a matched transmitting coil (22); under the specific high-frequency alternating current generated by the signal generator (1), the inductance value of the transmitting coil (22) and the capacitance value of the high-frequency alternating current capacitance element (21) are in a resonance condition, and under the corresponding high-frequency alternating current, the transmitting coil (22) is excited to be in a resonance state, and transmits a high-frequency electromagnetic field with the same frequency as the current of the signal generator (1).
6. The wireless energy transfer device facing the flexible lithium battery as recited in claim 5, characterized in that the inductance value of the adjustable inductor (13) is set to be in resonance with the capacitance value of the high-frequency alternating current capacitor element (21), so as to stabilize the high-frequency alternating current flowing in the transmitting coil (22).
7. The wireless energy transfer device facing the flexible lithium battery as recited in claim 1, characterized in that the secondary receiving circuit (3) comprises a flexible receiving coil (31) and a coupling alternating current capacitive element (32) matched with the flexible receiving coil for resonance; the flexible receiving coil (31) and the coupling AC capacitive element (32) have their corresponding inductance and capacitance values set to be in resonance at the frequency of the signal generator (1).
8. The wireless energy transfer device facing the flexible lithium battery as claimed in claim 1, wherein the rectifier (4) is a full-bridge rectifier circuit composed of four identical high-frequency schottky diodes (41), and a filter capacitor (42) matched with the high-frequency condition is added to smooth the output direct current.
9. The wireless energy transfer device oriented to the flexible lithium battery according to claim 1, characterized in that the charge control circuit (5) comprises a first resistor (51), a second resistor (52) and a control circuit; the first resistor (51) is connected in series with a second resistor (52), the delivery end of which is electrically connected with the rectifier (4); the control circuit is electrically connected to the first resistor (51) and the second resistor (52).
10. The wireless energy transfer device facing the flexible lithium battery as claimed in claim 9, wherein the control circuit comprises a buck-boost converter (53) and a charging control chip (54); the charging control chip (54) collects and detects the voltage at two ends of the load flexible lithium battery and the current supplied to the flexible lithium battery, and accordingly, the control and regulation of the output voltage and the output current are realized by controlling the buck-boost converter (53).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921877028.8U CN211296335U (en) | 2019-11-01 | 2019-11-01 | Wireless energy transfer device for flexible lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921877028.8U CN211296335U (en) | 2019-11-01 | 2019-11-01 | Wireless energy transfer device for flexible lithium battery |
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| Publication Number | Publication Date |
|---|---|
| CN211296335U true CN211296335U (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921877028.8U Active CN211296335U (en) | 2019-11-01 | 2019-11-01 | Wireless energy transfer device for flexible lithium battery |
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| Country | Link |
|---|---|
| CN (1) | CN211296335U (en) |
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- 2019-11-01 CN CN201921877028.8U patent/CN211296335U/en active Active
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