CN205986258U - Overvoltage crowbar and wireless charging receiving device - Google Patents
Overvoltage crowbar and wireless charging receiving device Download PDFInfo
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- CN205986258U CN205986258U CN201620981999.7U CN201620981999U CN205986258U CN 205986258 U CN205986258 U CN 205986258U CN 201620981999 U CN201620981999 U CN 201620981999U CN 205986258 U CN205986258 U CN 205986258U
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- receiving coil
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Abstract
The utility model discloses an overvoltage crowbar and wireless charging receiving device, include energy that conveys with resonance mode receipt transmitting coil and receiving coil, the connection that converts alternating voltage to receiving coil is used for adjusting the resonance matching network of receiving coil's frequency, right alternating voltage carries out rectifier circuit and the detection circuitry of rectification transform in order to generate direct current charging voltage, detection circuitry detects direct current charging voltage's amplitude to carry out the comparison with the safety threshold who sets for, if charging voltage's amplitude exceedes the safety threshold who sets for, then control the adjustment of resonance matching network receiving coil's frequency of operation makes receiving coil be in non - resonant condition at transmitting coil's frequency of operation point, and then makes the receiving coil received loss of voltage, has reached receiving terminal overvoltage protection's purpose of design then. The utility model discloses an overvoltage crowbar, simple structure, the reliable operation has greatly improved the security that wireless charging receiving device charges.
Description
Technical field
This utility model belongs to wireless charging technical field, specifically, is to be related to a kind of being used for wireless charging system
In receiving terminal carry out overvoltage protection circuit design and based on described overvoltage crowbar design wireless charging receive dress
Put.
Background technology
Wireless charging technology comes from wireless power transmission technology, and low power wireless charging technology is frequently with electromagnetic induction
Formula, and powerful wireless charging technology then adopts resonant mode, by power supply unit（Charger）Transmit its energy to power device.
Power device is charged to the battery of its inside using the energy receiving, and is used for its own running simultaneously.Due to charger
And power device between, energy is transmitted with magnetic field, connect without electric wire between the two, therefore, charger and power device can
Accomplish that no conductive junction point exposes, safe, charging operations are convenient flexibly, in current mobile phone, TV, electric automobile etc.
Field has obtained increasingly being widely applied.
In the electronic product designing based on resonance type wireless charging technique, charger end is provided with transmitting coil,
Receiving terminal（That is, power device）It is provided with receiving coil, when transmitting coil and receiving coil are adjusted to same frequency, in other words
When transmitting coil and receiving coil resonate in a specific frequency, just can exchange therebetween energy each other.In reality
During border uses, when the voltage of transmitting coil is larger or transmitting coil leads to the voltage of transmitting terminal higher because of operation irregularity
When, receiving coil will receive larger voltage.When receiving voltage exceedes the secure threshold of load circuit in power device,
May result in the load circuit excessive pressure damages in power device, then affect the service life of power device.
In order to receiving terminal is carried out with overvoltage protection, existing solution is installation over-voltage protector in receiving terminal,
Such as electric fuse, varistor, stabilivolt etc., to play certain overvoltage protection, burning voltage in circuit, to reduce damage etc.
Effect.But, this over-voltage protection method is all to be realized with protection device consumed energy, and after long-term work, protection device can
Can be able to lose efficacy, therefore protective effect is very limited.
Content of the invention
The purpose of this utility model is to provide a kind of brand-new over-voltage protection technology for wireless charging receiving terminal,
During the electric voltage exception that receiving terminal receives, to be reduced by the way of resonant frequency and the transmitting coil mismatch adjusting receiving coil
The voltage of receiving coil, reaches the purpose of overvoltage protection then.
For solving above-mentioned technical problem, this utility model employs the following technical solutions and is achieved：
This utility model proposes a kind of overvoltage crowbar in one aspect, applies in wireless charging receiver,
Including with resonance manner receive transmitting coil transmission energy and be converted into alternating voltage receiving coil, connect described reception line
Enclose and be used for adjust the resonant matching network of the frequency of described receiving coil, described alternating voltage carried out with rectifying conversion to generate
The rectification circuit of DC charging voltage and testing circuit；Described testing circuit detects the amplitude of described DC charging voltage, and
It is compared with the secure threshold setting；If the amplitude of charging voltage exceedes the secure threshold of setting, control described resonance
Distribution network adjusts the operating frequency of described receiving coil, makes receiving coil be in disresonance at the operating frequency point of transmitting coil
State, and then so that the voltage that receiving coil receives is reduced.
For the ease of adjusting the frequency of receiving coil, described resonant matching network is provided with the standby of alternative access
With electric capacity, described testing circuit when the amplitude described charging voltage is detected exceedes the secure threshold of setting, by controlling institute
State idle capacity and access described resonant matching network, to change the frequency of described receiving coil so as to deviate described transmitting coil
Operating frequency point, then reduce described charging voltage, reach the purpose of overvoltage protection.
Access a kind of preferred implementation of resonant matching network, described idle capacity as described idle capacity selectivity
At least provided with one, the described receiving coil of one end connection, the other end is grounded by switch element；Described testing circuit is in inspection
When measuring described charging voltage not less than secure threshold, described switch element is controlled to disconnect, the described idle capacity of isolation；In inspection
When measuring described charging voltage and exceeding secure threshold, control described switching elements conductive, make described idle capacity ground connection, will be described
Idle capacity accesses described resonant matching network.
Preferably, described resonant matching network is provided with multiple matching capacitance, by configuring described matching capacitance
Capacitance, is in resonant condition to adjust described receiving coil in the operating frequency point of transmitting coil；Described idle capacity setting
There are two, one end of first idle capacity connects one end of described receiving coil, and the other end of receiving coil is by described
Matching capacitance connects one end of second idle capacity, and the other end of two idle capacities is led to by the switch of described switch element
Road is grounded, and the control end of described switch element connects described testing circuit.
Access another preferred implementation of resonant matching network as described idle capacity selectivity, described humorous
Shake and be provided with multiple matching capacitance, by configuring the capacitance of described matching capacitance, to adjust described reception line in matching network
Circle is in resonant condition in the operating frequency point of transmitting coil；Described idle capacity at least provided with one, described idle capacity
After connecting, it is connected in parallel on the two ends of one or more described matching capacitance, described switch with the switch ways of switch element
The control end of element connects described testing circuit, by controlling described switch element break-make, to control described idle capacity choosing
Access resonant matching network to selecting property.
Preferably, after multiple described matching capacitance are parallel with one another, it is in series with described receiving coil.
In order to mention the effect of constant charge voltage, between described rectification circuit and testing circuit, it is additionally provided with filtered electrical
Road, after the DC charging voltage for exporting to rectification circuit is filtered processing, then transmits to described testing circuit.
Further, described testing circuit is provided with voltage sampling circuit and comparator, described voltage sampling circuit
Described DC charging voltage is sampled, and forms sampled voltage；Described comparator receives described sampled voltage, and with reference
Voltage is compared, and when described sampled voltage is more than described reference voltage, exports effective control signal to resonance pair net
Network, to adjust the frequency of described receiving coil, makes described receiving coil be in disresonance at the operating frequency point of transmitting coil
State；Wherein, described reference voltage determines according to described secure threshold.
Preferably, described reference voltage is preferably changed by linear voltage regulator by described DC charging voltage and is generated, transmission
To the inverting input of described comparator, the in-phase input end of described comparator receives described sampled voltage, exports high level
Effectively control signal is to described resonant matching network.
This utility model proposes a kind of wireless charging receiver on the other hand, receives transmitting including with resonance manner
The energy of coil transmission is simultaneously converted into the receiving coil of alternating voltage, connects described receiving coil and be used for adjusting described reception line
Circle the resonant matching network of frequency, described alternating voltage is carried out with rectifying conversion to generate the rectification circuit of DC charging voltage
And testing circuit；Described testing circuit detects the amplitude of described DC charging voltage, and is compared with the secure threshold setting
Relatively；If the amplitude of charging voltage exceedes the secure threshold of setting, described resonant matching network is controlled to adjust described receiving coil
Operating frequency, make receiving coil be in non-resonant condition at the operating frequency point of transmitting coil, and then so that receiving coil is connect
The voltage receiving reduces.
Compared with prior art, advantage of the present utility model and good effect are：This utility model is based on resonance type wireless
The receiving terminal overvoltage crowbar of charging technique design, using adjustment receiving coil during the overtension receiving in receiving terminal
Resonance point and the mode of the operating frequency point mismatch of transmitting coil, to make the voltage of receiving coil reduce, then to have reached and connect
The purpose of design of receiving end overvoltage protection.Using this overvoltage crowbar, special overvoltage protector need not be set in receiving terminal
Part, on the one hand can solve the problems, such as because setting up the energy loss that over-voltage protector is brought, and on the other hand can solve overvoltage
The problems such as protection device easily disabler because of life-time service, significantly improves the overvoltage protection effect of receiving terminal then,
Contribute to extending the service life of wireless charging receiver.
After the detailed description of this utility model embodiment is read in conjunction with the accompanying, other features of the present utility model and advantage
Will become clearer from.
Brief description
Fig. 1 is a kind of schematic block circuit diagram of embodiment of the overvoltage crowbar that this utility model is proposed；
Fig. 2 is a kind of circuit theory diagrams of embodiment of the overvoltage crowbar shown in Fig. 1；
Fig. 3 is the circuit theory diagrams of another embodiment of the overvoltage crowbar shown in Fig. 1.
Specific embodiment
Below in conjunction with the accompanying drawings specific embodiment of the present utility model is described in more detail.
The present embodiment proposes a kind of overvoltage crowbar based on resonance type wireless charging technique, applies in wireless charging system
The receiving terminal of system（That is, wireless charging receiver）, can in the overtension of receiving coil, adjust automatically receiving coil
Frequency point deviates the working frequency points of transmitting coil, enters mismatch Conditions by controlling receiving coil, so that receiving coil
Voltage reduces, and then reaches the purpose of design of overvoltage protection.
Its concrete methods of realizing is：In conjunction with shown in Fig. 1, first, according to different radio charging receiver to charging voltage
Ability to bear, preset secure threshold.According to the secure threshold setting, the reasonably transmitting coil in adjustment charger
Operating frequency, to meet charging requirement.Secondly, in wireless charging receiver, adjust the Frequency point of its receiving coil so as to
Resonant condition is entered at the operating frequency point of transmitting coil.Because impedance at present frequency point for the receiving coil is minimum, because
This energy conversion efficiency highest, can realize efficient reception and conversion to the magnetic field energy of transmitting coil transmitting.In transmitting
When coil working is normal, after rectified filtering of voltage being received by receiving coil etc. is processed, generates amplitude and be less than safety threshold
The DC charging voltage of value.Can be filled for the battery in wireless charging receiver using described DC charging voltage one side
Electricity, on the other hand can be supplied directly to the load circuit in wireless charging receiver, meet need for electricity during its operation.
When the input voltage of transmitting coil is larger or transmitting coil leads to transmitting terminal voltage higher because of operation irregularity, by receiving line
Enclose the charging voltage receiving will increase, may be beyond the secure threshold setting, then lead to load circuit crosses crushing
Bad.In order to wireless charging receiver is realized with overvoltage protection, the present embodiment is detecting the amplitude of described DC charging voltage
Exceed setting secure threshold when, change receiving coil frequency, matched receiving coil is adjusted to mismatch Conditions, that is,
Receiving coil is allowed to be in non-resonant condition at the operating frequency point of transmitting coil, so that the voltage of receiving coil reduces,
Reach the purpose of overvoltage protection.
In order to realize neatly adjusting to the frequency of receiving coil, resonance can be set in wireless charging receiver
Distribution network, connects described receiving coil, by adjusting the parameter value of the matching capacitance in resonant matching network, to adjust reception
Coil enters resonant condition at the operating frequency point of transmitting coil.In the overtension of receiving terminal, in order that receiving coil
Frequency shift, enter non-resonant condition, the present embodiment sets up optionally access standby in resonant matching network
With electric capacity, it is linked in resonant matching network when receiving-end voltage exceedes secure threshold by controlling idle capacity, so that
The frequency departure resonance point of receiving coil, enters mismatch Conditions.Now, the return loss of receiving coil increases, and impedance increases, and continues
And make to reduce by the charging voltage that receiving coil receives, play the effect of overvoltage protection.
Based on above-mentioned design philosophy, the present embodiment devises a set of overvoltage crowbar in wireless charging receiver,
As shown in figure 1, including the key components such as resonant matching network, rectification circuit, testing circuit, switch element, idle capacity.
Wherein, resonant matching network connects the receiving coil in wireless charging receiver, for adjusting to the frequency of receiving coil
Section.Adjust the capacitance of the matching capacitance in resonant matching network, make receiving coil and resonant matching network in transmitting coil
There is series resonance at operating frequency point, then receive the energy of transmitting coil transmission with resonance manner, and change generation exchange
Voltage.Using rectification circuit, rectifying conversion is carried out to the alternating voltage of receiving coil conversion output, to form DC charging voltage,
Power for the load circuit in wireless charging receiver, and charge for the battery in wireless charging receiver.Using detection
Circuit carries out sample detecting to the amplitude of described DC charging voltage, and is compared with secure threshold set in advance, if directly
The amplitude of current charge voltage not less than secure threshold then it represents that the voltage that receives of receiving coil is normal, protect by controlling switch element
Hold the off-state of acquiescence.Idle capacity is connected to described switch element, when switch element disconnects, controls described standby electricity
Hold and resonant matching network isolation, keep the resonant condition of receiving coil.When the amplitude that testing circuit detects charging voltage surpasses
When crossing the secure threshold setting, represent the overtension that receiving coil receives, need to execute overvoltage protection operation.Now, examine
Slowdown monitoring circuit output control signal, controls described switch element closure, idle capacity is accessed resonant matching network, then changes and connect
The Frequency point of take-up circle is so as to off-resonance point.Now, the return loss of receiving coil increases, and that is, receiving coil is in emission lines
It is in non-resonant condition, impedance increases, the voltage that receiving coil receives reduces, thus playing protection at the operating frequency point of circle
The effect of the load circuit in wireless charging receiver.
With reference to Fig. 2, Fig. 3, the particular circuit configurations and its operation principle of the overvoltage crowbar of the present embodiment are entered
The detailed elaboration of row.
As shown in Fig. 2 in the present embodiment, being provided with the matching capacitance of multi-channel parallel, example in described resonant matching network
As matching capacitance C3, C4, C5.After matching capacitance C3, C4, C5 parallel connection, it is in series with receiving coil L1, configuration described coupling electricity
Hold the capacitance of C3, C4, C5, so that receiving coil L1 is gone here and there at the operating frequency point of transmitting coil with resonant matching network
Connection resonance.Receive the energy of transmitting coil transmission using receiving coil L1, and be converted into AC voltages transmission to rectification circuit.Institute
State the alternating voltage that rectification circuit generates to receiving coil L1 and carry out rectifying conversion, generate DC voltage and carry out via filter circuit
After waveform shaping, export stable DC charging voltage Vin, transmit to load circuit or in wireless charging receiver
Battery charges.In testing circuit, design voltage sample circuit and comparator U1, are filled to described direct current using voltage sampling circuit
Piezoelectric voltage Vin is sampled, and generates sampled voltage Vo and transmits to one of input of comparator U1（For example, transmit to than
In-phase input end compared with device U1+）, connect reference voltage Vref in the another one input of comparator U1（For example, in comparator
The inverting input of U1-connection reference voltage Vref）, described reference voltage Vref should be according to the secure threshold determination setting.Make
A kind of preferred design for the present embodiment, it is possible to use linear voltage regulator LDO is carried out surely to described DC charging voltage Vin
Buckling is changed, to generate stable reference voltage Vref.The outfan of comparator U1 is connected to the control end of switch element K, profit
The low and high level Signal-controlled switch element K break-make being exported with comparator U1, and then change idle capacity C1, C2 in resonance coupling
Access in network or isolation.In the present embodiment, described idle capacity C1, C2 can arrange a road it is also possible to arrange
Multichannel, can connect receiving coil L1 using by one end of idle capacity C1 or C2, the other end is led to by the switch of switch element K
The mode of road ground connection, the selectivity realizing idle capacity C1 or C2 accesses, as shown in Figure 2.It is of course also possible to adopt standby electricity
After appearance C1 is connected with the switch ways of switch element K, the two ends of a road or multichannel matching capacitance C3, C4 or C5 wherein in parallel
Mode, to realize selectivity in resonant matching network for the idle capacity C1 and to access, as shown in Figure 3.
Fig. 2 shows the circuit design mode of setting two-way idle capacity C1, C2, by the one of wherein one road idle capacity C2
End connects to one end of described receiving coil L1, and the other end of receiving coil L1 passes through matching capacitance C3, C4 of series connection with it, C5
Parallel branch connect an other road idle capacity C1 one end, the other end of two-way idle capacity C1, C2 is connected to switch
The switch ways of element K, and by the switch ways ground connection of described switch element K.
When transmitting terminal is working properly, the alternating voltage being received by receiving coil L1 and generating is via rectification circuit and filter
The amplitude of the DC charging voltage Vin that wave circuit rectifying and wave-filtering exports after processing is less than the secure threshold setting, now by electricity
The sampled voltage Vo that pressure sample circuit collects is less than reference voltage Vref, and comparator U1 exports low level signal, controlling switch
Element K keeps the off-state of acquiescence.Now, idle capacity C1, C2 does not access resonant matching network, and receiving coil L1 is operated in
Under resonant condition.
The input voltage receiving when transmitting coil is larger or transmitting coil leads to launch terminal voltage relatively because of operation irregularity
Gao Shi, the alternating voltage being received and being generated by receiving coil L1 is defeated after processing via rectification circuit and filter circuit rectifying and wave-filtering
The amplitude of the DC charging voltage Vin going out raises, and has exceeded the secure threshold setting.Now, gathered by voltage sampling circuit
The sampled voltage Vo arriving is more than reference voltage Vref, and comparator U1 exports the effective control signal of high level, controlling switch element K
Conducting, and then so that the other end of idle capacity C1, C2 is grounded.Now, idle capacity C1, C2 accesses resonant matching network, leads to
The working frequency points of receiving coil L1 change, and deviate from resonance point.Now, the return loss of receiving coil L1 increases, impedance
Raising, then so that reducing by the voltage that receiving coil L1 receives, thus serving the effect of overvoltage protection.
Fig. 3 shows that idle capacity C1 selectivity is linked into the circuit design in resonant matching network by another.That is,
After idle capacity C1 is connected with the switch ways of switch element K, it is connected in parallel on wherein one tunnel coupling electricity in resonant matching network
Hold the two ends of C5.When charging voltage Vin is not less than the secure threshold setting, comparator U1 exports low level signal, and control is opened
Close element K to remain off, make idle capacity C1 isolate resonant matching network.When transmitting terminal electric voltage exception, lead to receiving terminal
Charging voltage Vin exceed setting secure threshold when, then comparator U1 output the effective control signal of high level, controlling switch
Element K turns on, and idle capacity C1 is accessed resonant matching network, and is in parallel with matching capacitance C5, then changes receiving coil
The working frequency points of L1, make receiving coil L1 and transmitting coil mismatch, receiving coil L1 at the operating frequency point of transmitting coil not
It again is at resonant condition, thus impedance increases, the voltage receiving reduces, and has reached the purpose of overvoltage protection.
Certainly, described idle capacity can also be selectively switched in resonant matching network using other modes, with reality
The now adjustment to the working frequency points of receiving coil L1.
In the present embodiment, described switch element K can have switch from transistor, controllable silicon, field effect transistor etc. and make
Electronic component, the present embodiment does not carry out concrete restriction to this.
Overvoltage crowbar of the present utility model, is come by the way of the working frequency points off-resonance point adjusting receiving coil
Reduce receiving-end voltage, compare the circuit design mode using over-voltage protector for the tradition, circuit relatively reliable, the Bu Huiyin of work
Lead to the forfeiture of function for the inefficacy of over-voltage protector, greatly improve the safety of wireless charging receiver charging.
Certainly, described above is not to restriction of the present utility model, and this utility model is also not limited to the example above,
Change, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model,
Also protection domain of the present utility model should be belonged to.
Claims (10)
1. a kind of overvoltage crowbar, applies in wireless charging receiver it is characterised in that including：
Receiving coil, is received the energy of transmitting coil transmission, and is converted into alternating voltage with resonance manner；
Resonant matching network, connects described receiving coil, for adjusting the frequency of described receiving coil；
Rectification circuit, carries out rectifying conversion to described alternating voltage, to generate DC charging voltage；
Testing circuit, detects the amplitude of described DC charging voltage, and is compared with the secure threshold setting；If charging voltage
Amplitude exceed the secure threshold of setting, then output control signals to resonant matching network, to adjust the work of described receiving coil
Working frequency, makes receiving coil be in non-resonant condition at the operating frequency point of transmitting coil, and then so that receiving coil is received
Voltage reduce.
2. overvoltage crowbar according to claim 1 is it is characterised in that be provided with described resonant matching network can
The idle capacity that selectivity accesses, described testing circuit exceedes the secure threshold of setting in the amplitude described charging voltage is detected
When, access described resonant matching network by controlling described idle capacity, to adjust described in the frequency departure of described receiving coil
The operating frequency point of transmitting coil, reduces described charging voltage then.
3. overvoltage crowbar according to claim 2 is it is characterised in that described idle capacity is at least provided with one,
The described receiving coil of one end connection, the other end is grounded by switch element；Described testing circuit is detecting the described electricity that charges
When pressure is not less than secure threshold, described switch element is controlled to disconnect, the described idle capacity of isolation；The described electricity that charges is being detected
When pressure exceedes secure threshold, control described switching elements conductive, make described idle capacity ground connection, described idle capacity is accessed institute
State resonant matching network.
4. overvoltage crowbar according to claim 3 is it is characterised in that be provided with many in described resonant matching network
The individual matching capacitance for making described receiving coil be in resonant condition at the operating frequency point of transmitting coil；
Described idle capacity is provided with two, and one end of first idle capacity connects one end of described receiving coil, receives line
The other end of circle connects one end of second idle capacity by described matching capacitance, and the other end of two idle capacities passes through
The switch ways ground connection of described switch element, the control end of described switch element connects described testing circuit.
5. overvoltage crowbar according to claim 2 is it is characterised in that be provided with many in described resonant matching network
The individual matching capacitance for making described receiving coil be in resonant condition at the operating frequency point of transmitting coil；
Described idle capacity, at least provided with one, after described idle capacity is connected with the switch ways of switch element, is connected in parallel on
The two ends of one or more described matching capacitance, the control end of described switch element connects described testing circuit, leads to
Cross the on off operating mode changing described switch element, to control described idle capacity to be selectively accessing resonant matching network.
6. the overvoltage crowbar according to claim 4 or 5 is it is characterised in that multiple described matching capacitance is mutual simultaneously
After connection, it is in series with described receiving coil.
7. overvoltage crowbar according to claim 1 is it is characterised in that between described rectification circuit and testing circuit
It is additionally provided with filter circuit, after the DC charging voltage for exporting to rectification circuit is filtered processing, transmit to described
Testing circuit.
8. the overvoltage crowbar according to any one of claim 1 to 5,7 is it is characterised in that in described testing circuit
In be provided with：
Voltage sampling circuit, samples to described DC charging voltage, forms sampled voltage；
Comparator, is received described sampled voltage, and is compared with reference voltage, when described sampled voltage is more than described reference electricity
During pressure, export effective control signal to resonant matching network, to adjust the frequency of described receiving coil, make described receiving coil
It is in non-resonant condition at the operating frequency point of transmitting coil；
Wherein, described reference voltage determines according to described secure threshold.
9. overvoltage crowbar according to claim 8 is it is characterised in that described reference voltage is by described DC charging electricity
Pressure is changed by linear voltage regulator and is generated, and transmits to the inverting input of described comparator, the in-phase input end of described comparator
Receive described sampled voltage, the output effective control signal of high level is to described resonant matching network.
10. a kind of wireless charging receiver is it is characterised in that be provided with overvoltage as claimed in any one of claims 1-9 wherein
Protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620981999.7U CN205986258U (en) | 2016-08-30 | 2016-08-30 | Overvoltage crowbar and wireless charging receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620981999.7U CN205986258U (en) | 2016-08-30 | 2016-08-30 | Overvoltage crowbar and wireless charging receiving device |
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| CN205986258U true CN205986258U (en) | 2017-02-22 |
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| CN201620981999.7U Active CN205986258U (en) | 2016-08-30 | 2016-08-30 | Overvoltage crowbar and wireless charging receiving device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300520A (en) * | 2016-08-30 | 2017-01-04 | 歌尔科技有限公司 | The overvoltage crowbar of wireless charging receiving terminal and over-voltage protection method |
| CN109986975A (en) * | 2017-11-20 | 2019-07-09 | 丰田自动车株式会社 | Power receiving system and Wireless power transmission system including it |
| CN110979042A (en) * | 2019-12-20 | 2020-04-10 | 中兴新能源汽车有限责任公司 | Wireless charging receiving device and wireless charging control method and wireless charging system |
-
2016
- 2016-08-30 CN CN201620981999.7U patent/CN205986258U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300520A (en) * | 2016-08-30 | 2017-01-04 | 歌尔科技有限公司 | The overvoltage crowbar of wireless charging receiving terminal and over-voltage protection method |
| CN109986975A (en) * | 2017-11-20 | 2019-07-09 | 丰田自动车株式会社 | Power receiving system and Wireless power transmission system including it |
| CN109986975B (en) * | 2017-11-20 | 2022-04-12 | 丰田自动车株式会社 | Power receiving device and wireless power transmission system including the same |
| CN110979042A (en) * | 2019-12-20 | 2020-04-10 | 中兴新能源汽车有限责任公司 | Wireless charging receiving device and wireless charging control method and wireless charging system |
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