CN211266542U - Quick charging system capable of adjusting charging current - Google Patents
Quick charging system capable of adjusting charging current Download PDFInfo
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- CN211266542U CN211266542U CN202020135042.7U CN202020135042U CN211266542U CN 211266542 U CN211266542 U CN 211266542U CN 202020135042 U CN202020135042 U CN 202020135042U CN 211266542 U CN211266542 U CN 211266542U
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Abstract
The utility model discloses a quick charging system of adjustable charging current size relates to the quick charge field, its technical scheme main points include with treat charger electric connection's external port, with external port electric connection and to the power module of external port power supply, with external port electric connection and according to the control module who treats charger type control power module output current size, its technical effect has the function to filling soon or the corresponding electric current of ordinary type's the charger output of treating, single mouth that charges can the adaptation fill soon and ordinary type treat the charger.
Description
Technical Field
The utility model relates to a quick charge field, in particular to quick charging system of adjustable charging current size.
Background
With the continuous development of science and technology and the increasing requirements of users, various portable electronic devices are more and more, and the coverage range is wider and wider. Some electronic devices have their own batteries, and some electronic devices can be used only by accessing an adapter to a power supply, so that a power adapter for electronic devices, which is small and light, is also popular among users.
The mobile phone is the most frequently used electronic equipment of users at present, and the mobile phone has limited battery capacity due to the volume limitation, and cannot use a battery with large capacity and large volume, so that the quick charging adapter is produced. However, a general fast charger is connected to a mobile phone that does not support a fast charging mode, a large current easily damages a battery of the mobile phone, and at present, people often set two charging ports on the charger to adapt to different mobile phone models. However, in use, people need to distinguish different charging ports, and even have the risk of inserting mistakes, which is very inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a quick charging system of adjustable charging current size, it has to fill soon or the function of the corresponding electric current of the charger output of treating of ordinary type, and single mouth that charges can the adaptation fill soon and ordinary type treat the charger.
The above technical purpose of the present invention can be achieved by the following technical solutions:
a quick charging system capable of adjusting the magnitude of charging current comprises an external port, a control module and a power supply module, wherein the external port is electrically connected with a to-be-charged device and used for receiving an identification signal output by the to-be-charged device, the control module is electrically connected with the external port and outputs a control signal based on the identification signal, and the power supply module is electrically connected with the external port and supplies power to the external port;
the power supply module includes:
the direct current output unit is electrically connected with the external port and outputs direct current supply current to the external port;
the control unit comprises a control input end electrically connected with the control module and an output end used for outputting an adjusting signal, and the control unit controls the size of the adjusting signal based on the control signal;
and the current limiting switch is used for connecting the direct current output unit and the ground wire, comprises an enabling end connected with the output end of the control unit, and adjusts the size of the direct current supply current based on the size of the adjusting signal.
By adopting the technical scheme, the direct current output unit is electrically connected with the external port, and the external port supplies power to the charger. The external port is electrically connected with the charger to be charged, receives the identification signal output by the charger to be charged, and when the charger to be charged is of a type supporting a quick charging protocol, the identification signal is at a high level, otherwise, the identification signal is at a low level. When the control module receives the identification signal, the control module outputs a control signal accordingly. When the control unit receives the control signal, the control unit outputs corresponding adjusting signals with different levels to enlarge or reduce the channel of the current-limiting switch, so that the direct current supply current output by the direct current output unit is adjusted, the function of outputting corresponding current for a quick-charging or common-type charger is realized, the phenomenon that the common-charging charger is burnt out by large current or the low current cannot meet the requirement of the quick-charging charger is avoided, and two different charging ports are respectively arranged.
Further setting: the direct current output unit includes:
the first rectifying circuit is used for receiving external alternating current and rectifying the external alternating current into direct current intermediate current;
the transformer comprises a primary side, a secondary side and a tertiary side, wherein the input end and the output end of the primary side are respectively connected with the rectifying circuit and the current-limiting switch;
the second rectifying circuit is connected with two ends of the secondary side of the transformer and used for receiving the alternating current output by the secondary side and rectifying and outputting the direct current supply current;
the sampling circuit is connected to the tertiary side of the transformer and outputs a corresponding alternating sampling signal based on the induction voltage of the tertiary side;
the control unit also comprises an enabling input end connected with the sampling circuit, and the control unit controls whether the adjustment signal is output or not based on the magnitude of the alternating sampling signal; the current limiting switch controls the on-off of the current limiting switch based on the adjusting signal.
By adopting the technical scheme, the initial state of the current limiting switch is a connected state, the first rectifying circuit is connected with the ground through the current limiting switch, when the first rectifying circuit is electrified, direct current intermediate current flows through the primary side, so that the primary side undergoes a current rising process, the tertiary side generates corresponding induction voltage and outputs a corresponding alternating sampling signal, the alternating sampling signal is input into the enabling input end, and the control unit outputs a corresponding adjusting signal based on the alternating sampling signal, so that the current limiting switch is controlled to be switched off. Because the current limiting switch is switched off, the current on the primary side disappears, at the moment, the alternating sampling signal received by the enabling input end is in a low level, and the control unit outputs a corresponding adjusting signal to be communicated with the current limiting switch again. The current limiting switch is repeatedly switched on and off, the secondary side correspondingly generates alternating induced current, and the second rectifying circuit receives the alternating current output by the secondary side and rectifies and outputs direct current supply current.
Further setting: the control module includes:
the control chip comprises an identification end connected to the external port for receiving the identification signal, a feedback end for outputting a feedback signal based on the identification signal, a control end for outputting a switching signal based on the identification signal, and a power supply end connected to the direct current output unit for supplying power to the control chip;
the controllable switch is arranged between the direct current output unit and the external port and connected to the control end of the control chip in parallel;
the optical coupler comprises a light emitting diode and a photoelectric triode, the light emitting diode is connected between the feedback end of the control chip and the direct current output unit in series, corresponding optical signals are output based on the feedback signals, the photoelectric triode is connected between the control input end of the control unit and the ground wire, and is used for receiving the optical signals and outputting corresponding control signals to the control input end of the control unit based on the optical signals sent by the light emitting diode.
By adopting the technical scheme, the control chip receives the identification signal input by the charger to be charged and outputs a corresponding feedback signal. When the identification signal corresponds to a quick-charging type charger to be charged, the feedback signal is at a low level, at the moment, the direct current supply current of the direct current output unit flows into the feedback end through the light emitting diode, the light emitting diode works to emit a light signal, so that the phototriode is conducted, and at the moment, the phototriode outputs a control signal at the low level to the control input end of the control unit. When the identification signal corresponds to a common type of charger to be charged, the feedback signal is at a high level, the light emitting diode does not work at the moment, the phototriode is not conducted, and the phototriode outputs a control signal at the high level to the control input end of the control unit at the moment.
Further setting: the first rectifying circuit comprises a rectifying bridge and a filter circuit, two input ends of the rectifying bridge are respectively connected with a live wire and a zero line, an input end of the filter circuit is connected with an output end of the rectifying bridge, and an output end of the filter circuit is connected with an input end of a primary side of the transformer.
By adopting the technical scheme, alternating current is rectified into direct current by the rectifier bridge, and the waveform of the direct current is more stable by the filter circuit.
Further setting: the model of the control chip is IP 2726.
Further setting: the second rectifying circuit comprises a rectifying chip, the rectifying chip comprises a drain terminal connected to one end of the secondary side of the transformer, a power supply terminal connected to one end of the secondary side of the transformer, which is far away from the drain terminal, and a grounding terminal connected to the ground wire, the grounding terminal and one end of the secondary side, which is far away from the drain terminal, are connected in series with a tenth capacitor and an eleventh capacitor, and two ends of the secondary side are connected in series with an eighth capacitor and a thirteenth resistor.
Further setting: the model of the rectifying chip is OB2004 AX.
By adopting the technical scheme, the second rectifying circuit receives the alternating current output by the secondary side of the transformer and rectifies and outputs the direct current supply current.
To sum up, the utility model discloses following beneficial effect has:
1. the charging port has the function of outputting corresponding current for the quick-charging or common-type charger to be charged, and a single charging port can be matched with the quick-charging and common-type charger to be charged;
2. through pulse width modulation, alternating current signals are modulated into high-frequency signals and then transformed, the transformation efficiency can be effectively enhanced, the size of the transformer is reduced, and the overall miniaturization of the charger is facilitated.
Drawings
Fig. 1 is a main board portion of a fast charging system capable of adjusting the magnitude of a charging current in the present embodiment;
fig. 2 is a sub-board portion of the quick charging system in which the magnitude of the charging current can be adjusted in the present embodiment.
In the figure, the position of the upper end of the main shaft,
1. an external port;
2. a power supply module;
21. a DC output unit;
211. a first rectifying circuit; 2111. a rectifier bridge; 2112. a filter circuit;
212. a second rectifying circuit; 213. a sampling circuit;
22. a current limiting switch; 23. a control unit;
3. and a control module.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the quick charging system includes an external port 1 electrically connected to a to-be-charged device, a power supply module 2 electrically connected to the external port 1 and supplying power to the external port 1, and a control module 3 electrically connected to the external port 1 and controlling the output current of the power supply module 2 according to the type of the to-be-charged device.
The external port 1 is an interface supporting a fast charging mode, and in this embodiment, is a TYPE-C interface supporting a fast charging mode. The interface includes a VBUS pin for power supply, a DM pin for transmitting a data positive signal, a DP pin for transmitting a data negative signal, a CC1 pin and a CC2 pin for determining positive and reverse directions, and a GND pin for ground. The DM pin and the DP pin are used for receiving an identification signal which is output by the charger and used for judging whether the quick charging type is supported or not.
The power supply module 2 includes a dc output unit 21, a current limiting switch 22 electrically connected to the dc output unit 21, and a control unit 23 for controlling the switching and current threshold of the current limiting switch 22.
The dc output unit 21 includes a first rectifying circuit 211, a second rectifying circuit 212, a sampling circuit 213, and a transformer including a primary side Np, a secondary side Ns, and a tertiary side Nf for coupling the first rectifying circuit 211, the second rectifying circuit 212, and the sampling circuit 213 together, respectively.
The first rectifying circuit 211 comprises a rectifying bridge 2111 and a filtering circuit 2112, wherein two input terminals of the rectifying bridge 2111 are respectively connected to the live line and the neutral line, and an input terminal of the filtering circuit 2112 is connected to an output terminal of the rectifying bridge 2111. The filter circuit 2112 includes a fifth resistor R5, a first inductor L1, a first capacitor C1, a second capacitor C2 and a second inductor L2, wherein the first capacitor C1 and the second capacitor C2 are polar capacitors, the positive terminal of the first capacitor C1 is connected to the output terminal of the rectifier bridge 2111, and the negative terminal is connected to the ground through the second inductor L2. The fifth resistor R5 and the first inductor L1 are connected in parallel, one end of the fifth resistor R5 is connected to the output end of the rectifier bridge 2111, the other end of the fifth resistor R1 is connected to the positive terminal of the second capacitor C2, and the negative terminal of the second capacitor C2 is connected to ground. The end of the first inductor L1 away from the rectifier bridge 2111 is the output end of the first rectifier circuit 211, is connected to the primary side Np of the transformer, and outputs the dc intermediate current.
The second rectifying circuit 212 includes a rectifying chip, a ninth capacitor C9, a thirteenth resistor R13, a tenth capacitor C10, an eleventh capacitor C11, and a twelfth capacitor C12, in this embodiment, the model of the rectifying chip is OB2004AX, and includes a Drain terminal Drain, GND, a channel terminal Vdd, and a power supply terminal Vin, the Drain terminal Drain is connected to one end of the secondary side Ns of the transformer, the channel terminal Vdd is connected to the ground through the tenth capacitor C10, the ground terminal GND is connected to the ground, and the power supply terminal Vin is connected to one end of the secondary side Ns of the transformer, which is far from the Drain terminal. The ninth capacitor C9 and the thirteenth resistor R13 are connected in series across the secondary side Ns of the transformer. The eleventh capacitor C11 and the twelfth capacitor C12 are polar capacitors, the positive terminals of the polar capacitors are connected to one end of the secondary side Ns of the transformer, which is far away from the drain terminal of the rectifier chip, and the negative terminals of the polar capacitors are connected to the ground wire. The end of the secondary side Ns of the transformer, which is far away from the drain terminal of the rectifier chip, is an output terminal of the second rectifier circuit 212, and is also an output terminal of the dc output unit 21, and outputs a dc supply current.
The sampling circuit 213 comprises a seventh resistor R7, two ends of the seventh resistor R7 are respectively connected to one end of the tertiary side Nf of the transformer and the control unit 23, one end of the seventh resistor R7 far away from the tertiary side Nf of the transformer is an output end of the sampling circuit 213, and a corresponding alternating sampling signal is output based on the induced voltage at the two ends of the tertiary side. The end of the tertiary side Nf of the transformer remote from the seventh resistor R7 is connected to ground.
The control unit 23 includes a control input electrically connected to the control module 3 and an output for outputting a regulation signal. In this embodiment, the control unit 23 is an OB2633x chip, and includes a power supply terminal VCC, an output terminal GATE, an enable output terminal PRT, a chip selection terminal CS, a control input terminal FB, and a ground terminal GND.
The output terminal GATE is connected to the current-limiting switch 22 via an eighth resistor R8, the end of the eighth resistor R8 remote from the output terminal GATE is connected to the output terminal GATE via a diode D4, and the diode D4 is directed from the end of the eighth resistor R8 remote from the output terminal GATE toward the output terminal GATE. An eleventh resistor R11 and a twelfth resistor R12 are connected between one end of the ninth resistor R9 far away from the eighth resistor R8 and the ground line in parallel.
The chip select terminal CS is connected to the end of the twelfth resistor R12 away from the ground through the tenth resistor R10, and is also connected to the ground through the eighth capacitor C8.
The supply terminal VCC is connected to the output terminal of the first rectifying circuit 211 via a first resistor R1 and a second resistor R2, and further connected to the end of the tertiary side Nf of the voltage regulator away from ground via a sixth resistor R6 and a diode D3, wherein the direction of the diode D3 is directed from the tertiary side Nf of the voltage regulator to the supply terminal VCC. A fifth capacitor C5 and a sixth capacitor C6 are connected in parallel between the power supply terminal VCC and the ground line.
The ground terminal GND is connected to the ground wire, and the control input terminal FB is connected to the control module 3. The enable output PRT is connected to the output of the sampling circuit 213 for receiving the ac sampling signal.
The current limiting switch 22 is connected to the end of the transformer primary Np remote from the output of the first rectifying circuit 211. In this embodiment, the current limiting switch 22 is an NMOS transistor Q1, and the output terminal of the first rectifying circuit 211 is connected to the drain terminal of the NMOS transistor Q1.
The control module 3 comprises a control chip, a controllable switch and an optical coupler.
The control chip comprises an identification end connected to the external port 1 for receiving the identification signal, a feedback end for outputting a feedback signal based on the identification signal, a control end for outputting a switching signal based on the identification signal, and a power supply end connected to the direct current output unit 21 for supplying power to the control chip. The controllable switch is arranged between the direct current output unit 21 and the external port 1 and connected to the control end of the control chip. In this embodiment, the controllable switch is an NMOS transistor Q2, and the model of the control chip is IP 2726. The gate of the NMOS transistor Q2 is connected to the control chip, the drain is connected to the output terminal of the power supply module 2, the source is connected to the VBUS pin of the external port 1, and the digital ground is further connected through a fifteenth capacitor C15.
The control chip comprises a DM pin connected with a DM pin of an external port 1, a DP pin connected with a DP pin of the external port 1, a CC1 pin connected with a CC1 pin of the external port 1, a CC2 pin connected with a CC2 pin of the external port 1, a CSN pin connected with the ground wire through a twenty-first resistor R21, a CSP pin connected with one end of the twenty-first resistor R21 far away from the ground wire, a GND pin connected with the ground wire through a twenty-first resistor R21, and an NTC pin connected with the ground wire through a fixed resistor RT1, an FB pin connected to a nineteenth resistor R19, a CMPI pin connected to an eighteenth capacitor C18, a CMPV pin connected to digital ground, a VCC pin connected to digital ground through a thirteenth capacitor C13, a VIN pin connected to the drain of NMOS transistor Q2 and also connected to digital ground through a fourteenth capacitor C14, a VOUT1G pin connected to the gate of NMOS transistor Q2 and also connected to the external port 1VBUS pin through a twentieth resistor R20, and a VOUT pin connected between the source of NMOS transistor Q2 and the external port 1VBUS pin. The identification terminal is a DM pin and a DP pin, and the control terminal is VOUT 1G. One ends of the nineteenth resistor R19 and the eighteenth capacitor C18, which are far away from the control chip, are connected to the drain of the NMOS tube Q2 sequentially through the seventeenth capacitor C17 and the eighteenth resistor R18. The nineteenth resistor R19 is also connected to ground through the zener diode D5 at the end of the control chip, wherein the anode of the zener diode D5 is connected to ground. The nineteenth resistor R19 is also connected to ground through a seventeenth resistor R17 at the end of the controller chip. The nineteenth resistor R19 is a feedback end from the end of the control chip, used for outputting a feedback signal and connected to the optical coupler.
The optical coupler comprises a light emitting diode U2-A and a phototriode U2-B, wherein the light emitting diode U2-A is connected between the feedback end of the control chip and the direct current output unit 21 in series, and outputs corresponding optical signals based on feedback signals. The photo transistor U2-B is an NPN transistor having a collector connected to the control input of the control unit 23 and an emitter connected to ground. The photo transistor U2-B is used for receiving the optical signal and outputting a corresponding control signal to the control input terminal of the control unit 23 based on the optical signal emitted by the light emitting diode.
The working principle of the quick charging system is as follows:
after the first rectifying circuit 211 is connected to the mains supply, the output terminal of the control unit 23 is set high, the gate voltage of the current limiting switch 22 is higher than the source voltage, and the first rectifying circuit 211 is connected to the ground through the current limiting switch 22, at this time, a direct current intermediate current flows through the primary side, so that the primary side undergoes a current rising process, the tertiary side generates a corresponding induced voltage and outputs a high-level alternating sampling signal to the enable input terminal, and the control unit 23 outputs a low-level adjusting signal at the output terminal based on the received high-level alternating sampling signal, so that the current limiting switch 22 is turned off. Since the current limiting switch 22 is turned off, the current on the primary side disappears, at this time, the alternating sampling signal received by the enable input terminal is at a low level, and the control unit 23 outputs a corresponding adjusting signal to connect the current limiting switch 22 again. Since the current limiting switch 22 is repeatedly turned on and off, the secondary side correspondingly generates an alternating induced current, and the second rectifying circuit 212 receives the alternating current output by the secondary side and rectifies and outputs a direct current supply current.
The direct current output unit 21 is electrically connected with the external port 1 through a controllable switch, and the external port 1 supplies power to the charger. After receiving the direct current power supply, the control chip turns on the controllable switch, so that the power supply module 2 is communicated with the external port 1. The external port 1 is electrically connected with the charger to be charged, receives an identification signal output by the charger to be charged, and when the charger to be charged is of a type supporting a quick charging protocol, the identification signal is at a high level, otherwise, the identification signal is at a low level. When the control chip receives the identification signal corresponding to the protocol supporting the quick charging, the control chip correspondingly outputs the feedback signal with low level, otherwise, the control chip outputs the feedback signal with high level. When the control chip outputs a low-level feedback signal, the power supply module 2 supplies power to the light emitting diode, the light emitting diode outputs a light signal, the phototriode receives the light signal, and outputs a low-level control signal to the control unit 23; when the control chip outputs a high-level feedback signal, the phototriode is not turned on, and a high-level control signal is output to the control unit 23.
When the control unit 23 receives the high-level control signal corresponding to the fast charging mode, it outputs a relatively high-level adjustment signal to enlarge the channel of the current-limiting switch 22, so as to increase the direct-current intermediate current output by the first rectifying circuit 211, and accordingly increase the direct-current supply current output by the second rectifying circuit 212. When the control unit 23 receives the low-level control signal corresponding to the normal charging mode, it outputs a relatively low high-level adjustment signal to expand the channel of the current-limiting switch 22, so as to reduce the direct-current intermediate current output by the first rectifying circuit 211, and accordingly reduce the direct-current supply current output by the second rectifying circuit 212. In conclusion, the function of outputting corresponding current for the quick-charging or common-type charger to be charged is realized, the phenomenon that the common charger to be charged is burnt out by large current or the quick-charging charger cannot be satisfied by low current is avoided, and therefore the situation that two different charging ports are respectively arranged is avoided.
The above-mentioned embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the present invention.
Claims (7)
1. A quick charging system capable of adjusting the magnitude of charging current is characterized by comprising an external port (1) electrically connected with a to-be-charged device and used for receiving an identification signal output by the to-be-charged device, a control module (3) electrically connected with the external port (1) and used for outputting a control signal based on the identification signal, and a power supply module (2) electrically connected with the external port (1) and used for supplying power to the external port (1);
the power supply module (2) comprises:
the direct current output unit (21) is electrically connected with the external port (1) and outputs direct current supply current to the external port (1);
the control unit (23) comprises a control input end electrically connected with the control module (3) and an output end used for outputting an adjusting signal, and controls the size of the adjusting signal based on the control signal;
and the current limiting switch (22) is used for connecting the direct current output unit (21) and the ground wire and comprises an enabling end connected with the output end of the control unit (23), and the current limiting switch (22) adjusts the size of the direct current supply current based on the size of the adjusting signal.
2. The adjustable charging current magnitude rapid charging system according to claim 1,
the DC output unit (21) includes:
a first rectifying circuit (211) for receiving an external alternating current and rectifying it into a direct intermediate current;
the transformer comprises a primary side, a secondary side and a tertiary side, wherein the input end and the output end of the primary side are respectively connected with the first rectifying circuit (211) and the current limiting switch (22);
the second rectifying circuit (212) is connected to two ends of the secondary side of the transformer and is used for receiving the alternating current output by the secondary side and rectifying and outputting the direct current supply current;
the sampling circuit (213) is connected to one end of the tertiary side of the transformer and outputs a corresponding alternating sampling signal based on the induction voltage of the tertiary side;
the control unit (23) further comprises an enabling input end connected with the sampling circuit (213), and the control unit controls whether the adjustment signal is output or not based on the size of the alternating sampling signal; the current limiting switch (22) controls the on-off of the current limiting switch based on the adjusting signal.
3. The fast charging system capable of adjusting the magnitude of charging current according to claim 2, wherein the control module (3) comprises:
the control chip comprises an identification end connected to the external port (1) for receiving the identification signal, a feedback end for outputting a feedback signal based on the identification signal, a control end for outputting a switch signal based on the identification signal, and a power supply end connected to the direct current output unit (21) for supplying power to the control chip;
the controllable switch is arranged between the direct current output unit (21) and the external port (1) and connected to the control end of the control chip in parallel;
and the optical coupler comprises a light emitting diode and a phototriode, the light emitting diode is connected between the feedback end of the control chip and the direct current output unit (21) in series and outputs a corresponding optical signal based on the feedback signal, and the phototriode is connected between the control input end of the control unit (23) and the ground wire and used for receiving the optical signal and outputting a corresponding control signal to the control input end of the control unit (23) based on the optical signal sent by the light emitting diode.
4. The rapid charging system capable of adjusting the magnitude of a charging current according to claim 3, wherein said first rectifying circuit (211) comprises a rectifying bridge (2111) and a filter circuit (2112), two input terminals of said rectifying bridge (2111) are connected to the live line and the neutral line, respectively, an input terminal of said filter circuit (2112) is connected to an output terminal of said rectifying bridge (2111), and an output terminal of said filter circuit (2112) is connected to an input terminal of the primary side of the transformer.
5. The fast charging system of claim 4, wherein the model of the control chip is IP 2726.
6. The fast charging system capable of adjusting the magnitude of charging current according to claim 5, wherein said second rectifying circuit (212) comprises a rectifying chip, said rectifying chip comprises a drain terminal connected to one end of the secondary side of the transformer, a power supply terminal connected to one end of the secondary side of the transformer far from the drain terminal, and a ground terminal connected to ground, said ground terminal and one end of the secondary side far from the drain terminal are connected in series with a tenth capacitor and an eleventh capacitor, and two ends of said secondary side are connected in series with an eighth capacitor and a thirteenth resistor.
7. The rapid charging system capable of adjusting the magnitude of charging current according to claim 6, wherein the model of the rectifying chip is OB2004 AX.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020135042.7U CN211266542U (en) | 2020-01-19 | 2020-01-19 | Quick charging system capable of adjusting charging current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020135042.7U CN211266542U (en) | 2020-01-19 | 2020-01-19 | Quick charging system capable of adjusting charging current |
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| CN211266542U true CN211266542U (en) | 2020-08-14 |
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| CN202020135042.7U Expired - Fee Related CN211266542U (en) | 2020-01-19 | 2020-01-19 | Quick charging system capable of adjusting charging current |
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