CN218526145U - Mobile power supply and wireless charging system - Google Patents
Mobile power supply and wireless charging system Download PDFInfo
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- CN218526145U CN218526145U CN202221975191.XU CN202221975191U CN218526145U CN 218526145 U CN218526145 U CN 218526145U CN 202221975191 U CN202221975191 U CN 202221975191U CN 218526145 U CN218526145 U CN 218526145U
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Abstract
The utility model belongs to the technical field of electronic equipment charging and specifically relates to a portable power source and wireless charging system. The utility model discloses portable power source and wireless charging system, through setting up the battery, wireless power transmitting circuit, battery charging and discharging circuit and transmission frequency controller, charge or from the battery to wireless power transmitting circuit release electric energy by battery charging and discharging circuit, and by transmission frequency controller control wireless power transmitting circuit at two at least different transmission frequencies with wireless mode transmission electric energy, thereby realized only setting up a set of transmitting circuit and transmitting coil in portable power source, just can charge to the different multiple rechargeable devices of treating of receiving frequency, portable power source's manufacturing cost has been reduced, reduce portable power source's volume and weight simultaneously, make it more portable.
Description
Technical Field
The utility model belongs to the technical field of electronic equipment charging and specifically relates to a portable power source and wireless charging system.
Background
Generally, a mobile power supply (portable power source) with a wireless charging function on the market combines a battery, a wireless electric energy transmitting circuit and an electric energy transmitting coil, and wireless charging of a mobile phone can be achieved. However, since the receiving frequencies of the electric energy of other electronic products such as a mobile phone and a watch are different, in order to wirelessly charge the watch, an electric energy transmitting circuit and an electric energy transmitting coil of the watch need to be configured in the mobile phone, which increases the manufacturing cost of the mobile phone. Additionally increased circuit and coil simultaneously, also increased precious volume and weight of charging, made the product be difficult for portablely.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a portable power source and a wireless charging system capable of wirelessly charging electronic devices with different receiving frequencies, such as a mobile phone and a watch, by only configuring a set of transmitting circuit and transmitting coil by adjusting the transmitting frequency of the transmitting coil, thereby reducing the manufacturing cost of the portable power source, and reducing the volume and weight of the portable power source, so as to make the portable power source more portable.
In a first aspect, an embodiment of the present invention provides a mobile power supply, the mobile power supply includes: a battery; a wireless power transmission circuit configured to wirelessly transmit power at least two different transmission frequencies; the battery charging and discharging circuit is connected with the battery and the wireless electric energy transmitting circuit and is used for charging the battery or releasing electric energy from the battery to the wireless electric energy transmitting circuit; and a transmission frequency controller connected to the wireless power transmission circuit, for controlling a transmission frequency of the wireless power transmission circuit.
Further, the wireless power transmitting circuit includes: the input end of the inverter circuit is connected with the battery charging and discharging circuit and the battery and is used for converting direct current into alternating current; and the resonance circuit is connected with the output end of the inverter circuit and used for transmitting electric energy in an electromagnetic induction mode.
Further, the transmission frequency controller is configured to collect a voltage of the resonance circuit and control a frequency of the alternating current output by the inverter circuit according to the voltage.
Further, the transmission frequency controller is configured to collect an input voltage and an input current of the inverter circuit, and control a frequency of the inverter circuit to output the alternating current according to the input voltage and the input current.
Further, the battery charge and discharge circuit includes: a charging port configured to connect a power supply; the charging circuit comprises a charging input end and a charging output end, the charging input end is connected with the charging port, and the charging output end is connected with the battery; and the discharge circuit comprises a discharge input end and a discharge output end, the discharge input end is connected with the battery, and the discharge output end is connected with the wireless electric energy transmitting circuit.
Further, the battery charging and discharging circuit further includes: and the first switch is arranged between the battery and the discharge circuit and used for connecting or disconnecting the battery and the discharge circuit.
Further, the battery charging and discharging circuit further includes: the charging branch is respectively connected with the charging input end and the discharging output end; the charging branch includes: and the second switch is used for switching on or switching off the charging branch.
Further, the battery charging and discharging circuit further includes: a management circuit connected to the charging port, the first switch, and the second switch, respectively, the management circuit configured to control the first switch to open and the second switch to close in response to the charging port being connected to a power source.
Further, the mobile power supply further includes: the casing, the battery, battery charge and discharge circuit, wireless power transmitting circuit with the transmission frequency controller all sets up inside the casing, battery charge and discharge circuit's input is connected to the casing is outside.
In a second aspect, the embodiment of the present invention further provides a wireless charging system, which includes: the mobile power supply as described above; and the equipment to be charged is a mobile phone or a watch with a wireless power receiving circuit.
The utility model discloses portable power source and wireless charging system, through setting up the battery, wireless power transmitting circuit, battery charging and discharging circuit and transmission frequency controller, charge or from the battery to wireless power transmitting circuit release electric energy by battery charging and discharging circuit, and by transmission frequency controller control wireless power transmitting circuit at two at least different transmission frequencies with wireless mode transmission electric energy, thereby realized only setting up a set of transmitting circuit and transmitting coil in portable power source, just can charge to the different multiple rechargeable devices of treating of receiving frequency, portable power source's manufacturing cost has been reduced, reduce portable power source's volume and weight simultaneously, make it more portable.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a mobile power supply according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mobile power supply according to another embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a wireless charging system according to an embodiment of the present invention.
Legend: 1. a battery charge and discharge circuit; 11. a charging circuit; 12. a discharge circuit; 13. a charging branch; 14. a charging port; 15. a management circuit; u. a battery; s1, a first switch; s2, a second switch; 2. a wireless power transmitting circuit; 21. an inverter circuit; 22. a resonant circuit; C1. a capacitor; tx. A transmit coil; 3. a transmission frequency controller; 4. a housing; 5. a wireless power receiving circuit; C2. a second capacitor; rx. receive coil.
Detailed Description
The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.
Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
Meanwhile, it should be understood that, in the following description, a "circuit" refers to a conductive loop constituted by at least one element or sub-circuit through electrical or electromagnetic connection. When an element or circuit is referred to as being "connected to" another element or element/circuit is referred to as being "connected between" two nodes, it may be directly coupled or connected to the other element or intervening elements may be present, and the connection between the elements may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is intended that the two be absent intermediate elements.
Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, the mobile power supply of the embodiment of the present invention includes a battery U, a wireless power transmitting circuit 2, a battery charging and discharging circuit 1, and a transmitting frequency controller 3. Wherein the wireless power transmission circuit 2 is configured to wirelessly transmit power at least two different transmission frequencies. The battery charging and discharging circuit 1 is connected with the battery U and the wireless electric energy transmitting circuit 2 and is used for charging the battery U or releasing electric energy from the battery U to the wireless electric energy transmitting circuit 2. The transmission frequency controller 3 is connected to the wireless power transmission circuit 2, and is configured to control the transmission frequency of the wireless power transmission circuit 2 according to the reception frequency of the charged device.
As different electronic equipment receives different frequencies of electric energy in the wireless charging process, for example, the receiving frequency of a mobile phone is 110kHz-205kHz, and the receiving frequency of a watch is 300kHz-350kHz. Therefore, in the prior art, if a portable power source with a wireless charging function is to be implemented, a mobile phone can be wirelessly charged, and a watch can also be wirelessly charged, two sets of transmitting circuits and transmitting coils with different transmitting frequencies need to be equipped, which may cause a load on a circuit structure of the portable power source, increase cost, and increase the volume and mass of the portable power source, resulting in reduced portability.
By the above arrangement, the mobile power supply of the embodiment can realize that when the charged device is a mobile phone, the transmission frequency controller 3 controls the wireless power transmission circuit 2 to transmit power at the receiving frequency (for example, 110kHz to 205 kHz) of the mobile phone, and when the charged device is a watch, the transmission frequency controller 3 controls the wireless power transmission circuit 2 to transmit power at the receiving frequency (for example, 300kHz to 350 kHz) of the watch. Therefore, the mobile power supply can charge various devices to be charged with different receiving frequencies by only arranging one group of transmitting circuits and transmitting coils in the mobile power supply, the manufacturing cost of the mobile power supply is reduced, and meanwhile, the size and the weight of the mobile power supply are reduced, so that the mobile power supply is more portable.
In a specific implementation, the wireless power transmitting circuit 2 includes an inverter circuit 21 and a resonant circuit 22. The input end of the inverter circuit 21 is connected with the battery charging and discharging circuit 1 and the battery U, and is used for converting direct current into alternating current. In the mobile power supply, the output of the battery U and the battery charging and discharging circuit 1 is direct current, and the resonant circuit 22 can emit electric energy in an electromagnetic induction mode only by introducing alternating current. Therefore, the present embodiment is provided with an inverter circuit 21 for converting direct current power into alternating current power. The resonant circuit 22 is connected to an output terminal of the inverter circuit 21, and is configured to emit electric energy in an electromagnetic induction manner. Specifically, the resonance circuit 22 includes a capacitor C and a transmission coil TX. The transmitting coil TX is connected in series with a capacitor C for transmitting electrical energy to the device to be charged.
In a specific implementation, the transmission frequency controller 3 may determine the kind of the charged device by detecting the voltage of the wireless power transmission circuit 2. Specifically, the transmission frequency controller 3 is configured to collect the voltage on the capacitor C in the resonant circuit 22, and control the inverter circuit 21 to output the frequency of the alternating current according to the voltage variation on the capacitor C. When the mobile power supply is in a standby state, the wireless power transmitting circuit 2 enters a low power consumption mode, and in the low power consumption mode, the wireless power transmitting circuit 2 excites a small pulse with a specific frequency at intervals to detect whether the device to be charged enters a charging area. When a pulse is transmitted, the capacitor C will undergo a charging and discharging process, and therefore the voltage on the capacitor C will increase to a maximum value and decay to 0. When there is no device to be charged, the voltage on the capacitor C decays at a fixed rate, for example, from an amplitude to 0, taking time T0. When the device is to be charged, the loss of the transmitting coil TX will increase, the quality factor Q thereof will decrease, and the voltage on the capacitor C will decay faster. For example, when a watch enters a charging area, it takes time T1 for the voltage on the capacitor C to decay from the amplitude to 0, and when a mobile phone enters the charging area, it takes time T2 for the voltage on the capacitor C to decay from the amplitude to 0. Because the receiving coil in the mobile phone is larger than that in the watch, when the mobile phone enters a charging area, the loss of the transmitting coil TX is higher, the quality factor Q is lower, and the discharging speed of the capacitor C is faster, so that T2< T1< T0. In summary, the transmission frequency controller 3 can determine whether the device to be charged enters the charging area of the mobile power supply by detecting the attenuation speed of the voltage amplitude on the capacitor C, and at the same time, can determine the type of the device to be charged, and then controls the transmission frequency of the transmission circuit 2 according to the type of the device to be charged, so as to match the receiving frequency of the device to be charged, and supply power to the device to be charged. For example, when the transmission frequency controller 3 detects that the voltage decay time on the capacitor C is T1, it is determined that the charged device is a watch, and the transmission frequency controller 3 controls the wireless power transmission circuit 2 to operate at a frequency of 300kHz to 350kHz to charge the watch. Similarly, when the transmission frequency controller 3 detects that the voltage attenuation time on the capacitor C is T2, it is determined that the charged device is a mobile phone, and the transmission frequency controller 3 controls the wireless power transmission circuit 2 to operate at a frequency of 110kHz to 205kHz, so as to charge the mobile phone.
As shown in fig. 2, in some alternative embodiments, the transmission frequency controller 3 may be further configured to collect an input voltage and an input current of the inverter circuit 21, and control the frequency of the output alternating current of the inverter circuit 21 according to the input voltage and the input current. The input power of the wireless power transmitting circuit 2 can be calculated according to the input voltage and the input current. When there is no device to be charged, the loss of the transmitting coil TX is small, the Q value of the quality factor is high, and the input power P0 of the wireless power transmitting circuit 2 is low. When the watch enters a charging area, the loss of the transmitting coil TX is increased, the quality factor Q value is reduced, and the input power P1 of the wireless power transmitting circuit 2 is increased. Similarly, when the device entering the charging area is a mobile phone, the input power P2 of the wireless power transmitting circuit 2 will be higher. Therefore, the transmission frequency controller 3 of this embodiment acquires the input power of the wireless power transmitting circuit 2 by collecting the input voltage and the input current of the variable circuit 21, then determines whether a device enters a charging area according to the input power of the wireless power transmitting circuit 2, determines the type of the device, and controls the transmission frequency of the wireless power transmitting circuit 2 according to the type of the device to be charged, so as to match the receiving frequency of the device to be charged and supply power to the device to be charged.
In some optional embodiments, the transmission frequency controller 3 may also detect whether the device to be charged and the type of the device to be charged by controlling the wireless power transmission circuit 2 to transmit power at different frequencies according to a certain rule. When the device to be charged is in the charging area, the device to be charged receives the electric energy of the charging frequency matched with the device to be charged. At this time, because a load is connected, the power of the wireless power transmitting circuit 2 will be increased, and meanwhile, when the receiving circuit of the load receives the power signal matched with the charging frequency of the receiving circuit, a handshake protocol will be executed, so that the received power changes according to a certain rule, and the transmitting power of the wireless power transmitting circuit 2 will also change accordingly. The transmission frequency controller 3 connected to the transmission circuit 2 at this time detects the change in the power and controls the wireless power transmission circuit 2 to maintain the current transmission frequency. Therefore, the device to be charged is continuously charged.
In a specific embodiment, the battery charging and discharging circuit 1 includes a charging port 14, a charging circuit 11, and a discharging circuit 12. The charging port 14 is used for connecting a power supply. The charging circuit 11 includes a charging input terminal connected to the charging port 14 and a charging output terminal connected to the battery U. The discharge circuit 12 includes a discharge input terminal connected to the battery U and a discharge output terminal connected to the wireless power transmitting circuit 2. When the battery U of the portable power source needs to be charged, the battery U can be connected to an external power source through the charging port 14, the battery U can be charged through the charging circuit 11, and when the charging port 14 is not connected to the external power source, the charging circuit 11 does not work. When the mobile power supply charges for the charging equipment, the electric energy stored in the battery U is transmitted to the wireless electric energy transmitting circuit 2 through the discharging circuit 12, and is transmitted by the wireless electric energy transmitting circuit 2 like the charging equipment, so that the wireless charging of the equipment is realized.
In some optional embodiments, the battery charging and discharging circuit 1 further includes a first switch S1. The first switch S1 is disposed between the battery U and the discharge circuit 12, and is used for connecting or disconnecting the battery U and the discharge circuit 12. In the present embodiment, by providing the first switch S1, it is possible to disconnect the battery U from the discharge circuit 12 when the other device is not charged by using the mobile power supply for a long time, so as to avoid additional consumption of electric energy in the battery U.
In some optional embodiments, the battery charging and discharging circuit 1 further comprises a charging branch 13. The charging branch 13 is connected to the charging input terminal and the discharging output terminal, and a second switch S2 is disposed on the charging branch 13 for switching on or off the charging branch 13. Charging branch 13 is used for providing the electric energy for wireless power transmitting circuit 2 when portable power source's battery U charges, makes portable power source self when charging, can also charge other equipment, and can not cause the loss to battery U. Specifically, when the charging port 14 is powered on, by closing the second switch S2, the electric energy received by the charging port 14 can be transmitted to the battery U through the charging circuit 11, and simultaneously transmitted to the wireless electric energy transmitting circuit 2 through the charging branch 13. Meanwhile, the connection between the battery U and the discharging circuit can be cut off by disconnecting the first switch S1, so that the problem that the service life of the battery is shortened due to the fact that the battery U discharges while being charged is solved.
In some optional embodiments, the battery charging and discharging circuit 1 further comprises a management circuit 15. The management circuit 15 is connected to the charging port 14, the first switch S1, and the second switch S2, respectively, and the management circuit 15 is configured to control the first switch S1 to be opened and the second switch S2 to be closed in response to the charging port 14 being connected to the power supply. Specifically, when charging port 14 switches on external power supply, management circuit 15 will detect that charging port 14 has current input, management circuit 15 will automatically control first switch S1 disconnection this moment, cut off battery U and discharge circuit 12' S connection, make discharge circuit 12 no longer discharge, control second switch S2 closure simultaneously, make charging branch 13 switch on, the external power supply that is received by charging port 14 directly supplies power to wireless power transmitting circuit 2 through charging branch 13, thereby automatic realization is when portable power source self charges, can also charge other equipment, and can not cause the loss to battery U.
In a specific implementation, the mobile power supply further comprises a housing 4. Battery U, battery charge and discharge circuit 1, wireless power transmitting circuit 2 and transmission frequency controller 3 all set up inside casing 4, and battery charge and discharge circuit 1's input can be connected to the casing 4 outside through charging port 14. When the portable power source is used for charging, electronic equipment such as a mobile phone or a watch with a wireless charging function is only required to be close to a charging area on the shell 4.
Fig. 3 is a schematic circuit structure diagram of a wireless charging system according to an embodiment of the present invention. As shown in fig. 3, the wireless charging system of the present embodiment includes the mobile power supply and the device to be charged, where the device to be charged is a mobile phone or a watch having the wireless power receiving circuit 5. Specifically, the wireless power receiving circuit 5 includes a receiving coil RX and a second capacitor C2. The receiving coil RX is used to couple with the transmitting coil TX so as to receive the power transmitted by the wireless power transmitting circuit 2 in an electromagnetic induction manner.
To sum up, the utility model discloses portable power source and wireless charging system, through setting up battery U, wireless power transmitting circuit 2, battery charging and discharging circuit 1 and transmission frequency controller 3, charge or from battery U to wireless power transmitting circuit 2 release electric energy by battery charging and discharging circuit 1, and by transmission frequency controller 3 control wireless power transmitting circuit 2 at two at least different transmitting frequency with wireless mode transmission electric energy, thereby realized only setting up a set of transmitting circuit and transmitting coil TX in portable power source, just can charge to the different multiple rechargeable devices of treating of receiving frequency, portable power source's manufacturing cost has been reduced, reduce portable power source's volume and weight simultaneously, make it more portable.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A mobile power supply, comprising:
a battery (U);
a wireless power transmission circuit (2) configured to wirelessly transmit power at least two different transmission frequencies;
the battery charging and discharging circuit (1) is connected with the battery (U) and the wireless power transmitting circuit (2) and is used for charging the battery (U) or releasing power from the battery (U) to the wireless power transmitting circuit (2); and
and the transmitting frequency controller (3) is connected with the wireless power transmitting circuit (2) and is used for controlling the transmitting frequency of the wireless power transmitting circuit (2).
2. Mobile power supply according to claim 1, characterized in that said wireless power transmission circuit (2) comprises:
the input end of the inverter circuit (21) is connected with the battery charging and discharging circuit (1) and the battery (U) and is used for converting direct current into alternating current; and
and the resonance circuit (22) is connected with the output end of the inverter circuit (21) and is used for transmitting electric energy in an electromagnetic induction mode.
3. Mobile power supply according to claim 2, characterized in that the transmission frequency controller (3) is configured to collect a voltage of the resonance circuit (22) and to control the frequency of the output alternating current of the inverter circuit (21) in accordance with the voltage.
4. The mobile power supply according to claim 2, wherein the transmission frequency controller (3) is configured to collect an input voltage and an input current of the inverter circuit (21) and control a frequency of the output alternating current of the inverter circuit (21) according to the input voltage and the input current.
5. Mobile power supply according to claim 1, characterized in that the battery charge-discharge circuit (1) comprises:
a charging port (14) configured to connect to a power source;
a charging circuit (11) comprising a charging input terminal and a charging output terminal, wherein the charging input terminal is connected with the charging port (14), and the charging output terminal is connected with the battery (U); and
and the discharge circuit (12) comprises a discharge input end and a discharge output end, the discharge input end is connected with the battery (U), and the discharge output end is connected with the wireless electric energy transmitting circuit (2).
6. Mobile power supply according to claim 5, characterized in that said battery charge and discharge circuit (1) further comprises:
a first switch (S1) provided between the battery (U) and the discharge circuit (12) for connecting or disconnecting the battery (U) and the discharge circuit (12).
7. Mobile power supply according to claim 6, characterized in that said battery charge and discharge circuit (1) further comprises:
a charging branch (13) respectively connected with the charging input end and the discharging output end;
the charging branch (13) comprises:
a second switch (S2) for switching the charging branch (13) on or off.
8. Mobile power supply according to claim 7, characterized in that said battery charge and discharge circuit (1) further comprises:
a management circuit (15) connected to the charging port (14), the first switch (S1) and the second switch (S2), respectively, the management circuit (15) being configured to control the first switch (S1) to open and the second switch (S2) to close in response to the charging port (14) being connected to a power source.
9. The mobile power supply according to claim 1, wherein the mobile power supply further comprises:
casing (4), battery (U) battery charge and discharge circuit (1) wireless power transmitting circuit (2) with transmission frequency controller (3) all set up inside casing (4), the input of battery charge and discharge circuit (1) is connected to casing (4) are outside.
10. A wireless charging system, comprising:
the mobile power supply of any one of claims 1-9; and
the device to be charged is a mobile phone or a watch with a wireless power receiving circuit (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221975191.XU CN218526145U (en) | 2022-07-26 | 2022-07-26 | Mobile power supply and wireless charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221975191.XU CN218526145U (en) | 2022-07-26 | 2022-07-26 | Mobile power supply and wireless charging system |
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| Publication Number | Publication Date |
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| CN218526145U true CN218526145U (en) | 2023-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221975191.XU Active CN218526145U (en) | 2022-07-26 | 2022-07-26 | Mobile power supply and wireless charging system |
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| CN (1) | CN218526145U (en) |
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2022
- 2022-07-26 CN CN202221975191.XU patent/CN218526145U/en active Active
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