CN111463908A - Wireless charging parallel chip device, wireless charging method and wireless charging device - Google Patents
Wireless charging parallel chip device, wireless charging method and wireless charging device Download PDFInfo
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- CN111463908A CN111463908A CN202010462120.9A CN202010462120A CN111463908A CN 111463908 A CN111463908 A CN 111463908A CN 202010462120 A CN202010462120 A CN 202010462120A CN 111463908 A CN111463908 A CN 111463908A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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Abstract
The application discloses a wireless charging parallel chip device, a wireless charging method and a wireless charging device, and belongs to the field of wireless charging. The wireless charging parallel chip device comprises a resonance unit, wherein the resonance unit is connected with a bridge rectifier chip, the bridge rectifier chip comprises at least two rectifier units and a control chip which are connected in parallel, and the rectifier units are connected with the control chip. A wireless charging device, comprising: the wireless charging parallel chip device. When the method and the device are in a high-power charging state, the parasitic resistance is reduced due to the parallel connection influence of the rectifying units, so that the power loss on the rectifying units is reduced, and the heating rate is reduced.
Description
Technical Field
The invention belongs to the field of wireless charging, and particularly relates to a wireless charging parallel chip device, a wireless charging method and a wireless charging device.
Background
The wireless charging technology is derived from a wireless power transmission technology and can be divided into a low-power wireless charging mode and a high-power wireless charging mode. The low power wireless charging usually adopts the electromagnetic induction type, such as Qi mode for charging the mobile phone, the power supply equipment (charger) transmits the energy to the device for power utilization, and the device charges the battery by using the received energy and simultaneously provides the device for self operation. Because the charger and the electric device transmit energy by magnetic field, the charger and the electric device are not connected by electric wires, so that no conductive contact is exposed.
In a high-power charging state, the chip emits heat due to the parasitic resistance of the chip, so that the transmission power is wasted.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a wireless charging parallel chip device, a wireless charging method and a wireless charging device, and solves the problems that when the current is increased, an inductance coil wastes large power consumption and generates heat.
The utility model provides a wireless parallelly connected chip device that charges, includes resonance unit, bridge rectifier chip, resonance unit with bridge rectifier chip connects, bridge rectifier chip is parallelly connected with another rectifier chip.
The resonance unit comprises at least two resonance cavities.
The number of the resonant cavities is two, the resonant cavities comprise a first resonant cavity and a second resonant cavity which are connected in parallel, the first resonant cavity comprises a first inductor L s1 and a first capacitor Cs1 which are connected in series, the second resonant cavity comprises a second inductor L s2 and a second capacitor Cs2 which are connected in series, and two ends of the first resonant cavity and the second resonant cavity are both connected with the input end of the bridge rectifier chip;
a first switch M5e is arranged between the second capacitor and the bridge rectifier chip in series, and a second switch is arranged between the second inductor and the bridge rectifier chip in series;
a wire is connected between the first inductor L s1 and the first capacitor Cs1, and to the second inductor L2 and the second capacitor Cs 2.
The first capacitor Cs1 and the second capacitor Cs2 have the same capacitance value.
The first inductor L s1 and the second inductor L s2 have equal inductance values.
The second switch comprises two field effect transistors, a first transistor M6e and a second transistor M7 e;
the gate of the first transistor M6e is connected to the gate of the second transistor M7e and also connected to the first driving terminal DRV _ M6e of the bridge rectifier chip, the source of the first transistor M6e is connected to the source of the second transistor M7e, the drain of the first transistor M6e is connected to one end of the second inductor L s2, and the drain of the second transistor M7e is connected to one end of the first inductor L s 1.
And the first resonant cavity and the second resonant cavity are connected with a filter capacitor in parallel.
The rectifying chip comprises a rectifying unit and a logic control unit, and the rectifying unit is connected with the bridge rectifying chip through the logic control unit.
The resonance unit includes a resonance cavity.
A wireless charging method is realized by using the wireless charging parallel resonant cavity;
in a first working state, when the first switch and the second switch are both cut off, the first resonant cavity is accessed;
and in a second working state, when the first switch and the second switch are both conducted, the first resonant cavity and the second resonant cavity are accessed.
A wireless charging device comprises the wireless charging parallel chip device.
The beneficial effect that this application reached:
the invention provides a wireless charging parallel chip device and a wireless charging device.
Drawings
FIG. 1: the wireless charging parallel chip device provided by the embodiment of the invention is provided with a schematic diagram of two resonant cavities;
FIG. 2: the wireless charging parallel chip device of the embodiment of the invention is provided with a schematic diagram of a resonant cavity.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
The utility model provides a wireless parallelly connected chip device that charges, includes resonance unit, bridge rectifier chip, resonance unit with bridge rectifier chip connects, bridge rectifier chip is parallelly connected with another rectifier chip.
The resonance unit comprises at least two resonance cavities.
The number of the resonant cavities is two, the resonant cavities comprise a first resonant cavity and a second resonant cavity which are connected in parallel, the first resonant cavity comprises a first inductor L s1 and a first capacitor Cs1 which are connected in series, the second resonant cavity comprises a second inductor L s2 and a second capacitor Cs2 which are connected in series, and two ends of the first resonant cavity and the second resonant cavity are both connected with the input end of the bridge rectifier chip;
a first switch M5e is arranged between the second capacitor and the bridge rectifier chip in series, and a second switch is arranged between the second inductor and the bridge rectifier chip in series;
a wire is connected between the first inductor L s1 and the first capacitor Cs1, and to the second inductor L2 and the second capacitor Cs 2.
The wire function is that when two resonant cavities are connected in parallel, the inductance value of L is reduced, C is increased, and the front resonant frequency and the rear resonant frequency are stable, in a preferred embodiment, L s1 and L s2 are set to have the same inductance value, Cs1 and Cs2 have the same capacitance value, at the moment, the inductance value of a new resonant cavity connected in parallel is half of the original inductance value, the capacitance value is twice of the original capacitance value, the resonant frequency is totally unchanged, and the new resonant cavity is matched with the resonant cavity at the transmitting end after being changed, so that the maximum transmission efficiency is ensured.
The first capacitor Cs1 and the second capacitor Cs2 have the same capacitance value.
The first inductor L s1 and the second inductor L s2 have equal inductance values.
A wireless charging method is realized by using the wireless charging parallel resonant cavity;
in a first working state, when the first switch and the second switch are both cut off, the first resonant cavity is accessed;
and in a second working state, when the first switch and the second switch are both conducted, the first resonant cavity and the second resonant cavity are accessed.
When the first switch and the second switch are both turned off, that is, the first switch M5e, the first transistor M6e and the second transistor M7e are all turned off, and are connected to the first resonant cavity;
at the moment, the device is in a low-power consumption use state, and is connected into a resonant cavity, and the heating is not high due to the fact that the current is small;
l s1, Cs1 are 8 muH, 300nH in order to make the receiving coil easily driven by the wireless transmitting coil;
at low power, the first resonant cavity L s1, Cs1 operates at a resonant frequency:
wherein f isT1L s1 is the inductance of the first inductor L s1, and Cs1 is the capacitance of the first capacitor Cs1, which is the resonant frequency in the first operating state;
in a second working state, when the first switch and the second switch are both turned on, that is, the first switch M5e, the first transistor M6e and the second transistor M7e are all turned on, and are connected to the first resonant cavity and the second resonant cavity;
in the low-power use state, the current is low, the heat generated by the resonant cavity is low, the temperature rise is not obvious, and the influence on the operation of the semiconductor device is not obvious.
Under the condition of low power, if the resonant cavity is not changed, the heating power of the resonant cavity is increased, the temperature is increased, and the normal operation of the semiconductor device is influenced. Because the total power transmitted from the transmitting end to the receiving end is constant, the heating power of the resonant cavity is increased, and the power actually used for charging is reduced. Therefore, in the high-power use state, the other resonant cavity is merged into the resonant unit through the change of the connection relation, so that the overall parasitic resistance of the resonant unit is reduced, the heating power is reduced, and the actual charging efficiency is improved.
When the charging current increases, Rx sends a predetermined instruction to Tx, and Tx increases the voltage of a transmitting coil; simultaneously, the following steps:
DRV_M5e＝BSTP；
DRV_M6e＝BSTN；
DRV _ M5e is a voltage of DRV _ M5e of the bridge rectifier IC, DRV _ M6e is a voltage of DRV _ M6e of the bridge rectifier IC, BSTP is a voltage of BSTP, and BSTN is a voltage of BSTN.
M5e, M6e and M7e are turned on simultaneously, the on-resistance is 10mohms, L s 2-L s1 and Cs 2-Cs 1 are reasonably designed, and the inductance and capacitance of the resonant cavity are as follows:
the resonant frequency of the cavity is thus constant:
of these, L sTotalIs the total inductance of the resonator, CsTotalIs the total capacitance of the resonator.
However, the parallel connection of L s1 and L s2 changes the series parasitic resistance of the coil to 1/2, thereby saving power consumption and reducing heat generation.
The second switch comprises two field effect transistors, a first transistor M6e and a second transistor M7 e;
the gate of the first transistor M6e is connected to the gate of the second transistor M7e and also connected to the first driving terminal DRV _ M6e of the bridge rectifier chip, the source of the first transistor M6e is connected to the source of the second transistor M7e, the drain of the first transistor M6e is connected to one end of the second inductor L s2, and the drain of the second transistor M7e is connected to one end of the first inductor L s 1.
The effect is to prevent the field effect transistor from being turned on when being in the off state, and the potential at L s1 is influenced.
And the first resonant cavity and the second resonant cavity are connected with a filter capacitor in parallel.
The rectifying chip comprises a rectifying unit and a logic control unit, the rectifying unit is connected with the bridge rectifying chip through the logic control unit, as shown in fig. 1, the detailed connection mode is described as follows:
the circuit specifically comprises a first switch M5e, a first transistor M6e, a second transistor M7e, a first inductor L s1, a second inductor L s2, a first capacitor Cs1 and a second capacitor Cs 2;
the first inductor L s1 and the first capacitor Cs1 are connected in series to form a first resonant cavity, the second inductor L s2 and the second capacitor Cs2 are connected in series to form a second resonant cavity, and the first resonant cavity and the second resonant cavity are connected in parallel and are both connected with a bridge rectifier chip.
The first switch M5e is located at the side of the second capacitor Cs2 of the second resonant cavity, and is respectively connected with the second capacitor Cs2 and the bridge rectifier chip, the first transistor M6e is connected in series with the second transistor M7e, is placed at the side of the second inductor L s2 of the second resonant cavity, and is respectively connected with the second inductor L s2 and the bridge rectifier chip, and the connection between the first inductor L s1 and the first capacitor Cs1 is connected with the connection between the second inductor L s2 and the second capacitor Cs 2.
In the first resonant cavity, one end of the first capacitor Cs1 is connected to a connection point ACP of a bridge rectifier chip, the other end of the first capacitor Cs1 is connected to a connection point of the first inductor L s1 and a connection point of the second inductor L s2 and the second capacitor Cs2, the other end of the first inductor L s1 is connected to a connection point ACN of the bridge rectifier chip, the connection point ACN of the bridge rectifier chip is connected to a drain of the second transistor M7e, a source of the second transistor M7e is connected to a source of the first transistor M6e, a gate of the second transistor M7e is connected to a gate of the first transistor M6e and a driving signal terminal DRV _ M6e of the bridge rectifier chip, a drain of the first transistor M6e is connected to one end of the second inductor L s2, the other end of the second inductor M L s2 is connected to one end of the second capacitor Cs2, and the other end of the second capacitor Cs2 is connected to a connection point of the first switch M865, a drain of the first switch M865 and a drain switch e is connected to a drain of the bridge rectifier chip switch M365.
A first rectifying unit comprising: m1, M2, M3, M4.
A second rectification unit including: m1e, M2e, M3e, M4 e.
The resonant unit comprises a resonant cavity, as shown in fig. 2.
The resonant cavity comprises a first inductor L s1, a first capacitor Cs 1;
one end of the first inductor L s1 is connected to one end of a first capacitor Cs1, the other end of the first capacitor Cs1 is connected to the connection point ACP and one end of the filter capacitor C3, and the other end of the first inductor L s1 is connected to the other end of the first capacitor C3 and the connection point ACN.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (11)
1. The wireless charging parallel chip device comprises a resonance unit and a bridge rectifier chip, wherein the resonance unit is connected with the bridge rectifier chip, and the wireless charging parallel chip device is characterized in that the bridge rectifier chip is connected with another rectifier chip in parallel.
2. The wireless charging parallel chip device according to claim 1, wherein: the resonance unit comprises at least two resonance cavities.
3. The wireless charging parallel chip device according to claim 2, wherein the number of the resonant cavities is two, and the wireless charging parallel chip device comprises a first resonant cavity and a second resonant cavity which are connected in parallel with each other, the first resonant cavity comprises a first inductor (L s1) and a first capacitor (Cs1) which are connected in series with each other, the second resonant cavity comprises a second inductor (L s2) and a second capacitor (Cs2) which are connected in series with each other, and two ends of the first resonant cavity and the second resonant cavity are both connected with the input end of the bridge rectifier chip;
a first switch is arranged between the second capacitor and the bridge rectifier chip in series, and a second switch is arranged between the second inductor and the bridge rectifier chip in series;
a wire is connected between the first inductor (L s1) and the first capacitor (Cs1) and between the second inductor (L s2) and the second capacitor (Cs 2).
4. The wireless charging parallel chip device according to claim 2, wherein: the first capacitance (Cs1) and the second capacitance (Cs2) are equal in capacitance value.
5. The wireless charging parallel chip apparatus of claim 3, wherein the first inductor (L s1) and the second inductor (L s2) have equal inductance values.
6. The wireless charging parallel chip device according to claim 2, wherein: the second switch comprises two field effect transistors, a first transistor (M6e) and a second transistor (M7 e);
the gate of the first transistor (M6e) is connected to the gate of the second transistor (M7e) and is also connected to the first driving terminal (DRV _ M6e) of the bridge rectifier chip, the source of the first transistor (M6e) is connected to the source of the second transistor (M7e), the drain of the first transistor (M6e) is connected to one end of the second inductor (L s2), and the drain of the second transistor (M7e) is connected to one end of the first inductor (L s 1).
7. The wireless charging parallel chip device according to any one of claims 1 to 6, wherein: and the first resonant cavity and the second resonant cavity are connected with a filter capacitor in parallel.
8. The wireless charging parallel chip device according to claim 7, wherein: the rectifying chip comprises a rectifying unit and a logic control unit, and the rectifying unit is connected with the bridge rectifying chip through the logic control unit.
9. The wireless charging parallel chip device according to claim 1, wherein: the resonance unit includes a resonance cavity.
10. A wireless charging method is realized by using the wireless charging parallel resonant cavity of any claim 1 to 9, and is characterized in that:
in a first working state, when the first switch and the second switch are both cut off, the first resonant cavity is accessed;
and in a second working state, when the first switch and the second switch are both conducted, the first resonant cavity and the second resonant cavity are accessed.
11. A wireless charging device, characterized in that: the wireless charging parallel chip device of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010462120.9A CN111463908A (en) | 2020-05-27 | 2020-05-27 | Wireless charging parallel chip device, wireless charging method and wireless charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010462120.9A CN111463908A (en) | 2020-05-27 | 2020-05-27 | Wireless charging parallel chip device, wireless charging method and wireless charging device |
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| Publication Number | Publication Date |
|---|---|
| CN111463908A true CN111463908A (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010462120.9A Pending CN111463908A (en) | 2020-05-27 | 2020-05-27 | Wireless charging parallel chip device, wireless charging method and wireless charging device |
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| Country | Link |
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| CN (1) | CN111463908A (en) |
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- 2020-05-27 CN CN202010462120.9A patent/CN111463908A/en active Pending
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Address after: Room 01, 10 / F, block a, Tiangong building, No.30 Xueyuan Road, Haidian District, Beijing Applicant after: Meixinsheng Technology (Beijing) Co.,Ltd. Address before: Room 01, 10 / F, block a, Tiangong building, No.30 Xueyuan Road, Haidian District, Beijing Applicant before: MAXIC TECHNOLOGY (BEIJING) Co.,Ltd. |
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