CN114696403A

CN114696403A - Power adapter

Info

Publication number: CN114696403A
Application number: CN202011638954.7A
Authority: CN
Inventors: 张晨松; 林尚波; 江森龙; 田晨; 张加亮
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-07-01
Anticipated expiration: 2040-12-31
Also published as: WO2022143606A1; CN114696403B

Abstract

The application discloses power adapter belongs to the technical field of charging. The power adapter includes: the system comprises a plurality of adapter circuits and a charging interface which are connected in series, wherein two ends of the plurality of adapter circuits which are connected in series are respectively and electrically connected with the charging interface; the plurality of adapter circuits are used for switching the output state of at least one adapter circuit in the plurality of adapter circuits under the condition that a first electric energy parameter of the charging electric energy output by the power adapter through the charging interface is inconsistent with a second electric energy parameter of the charging electric energy required by the device to be charged. The technical scheme provided by the embodiment of the application can improve the output power of the power adapter.

Description

Power adapter

Technical Field

The application relates to the technical field of charging, in particular to a power adapter.

Background

In practical application, the electronic device generally needs to be charged through the power adapter, specifically, in the charging process, the electronic device may be connected to the power adapter through the charging interface, the power adapter may be connected to an external power source, the power adapter may perform processing such as voltage reduction on the charging electric energy output by the external power source, and output the processed charging electric energy to the electronic device through the charging interface to charge the electronic device.

In practical applications, the output power of the power adapter is closely related to the charging efficiency of the electronic device, and therefore, how to increase the output power of the power adapter has become a problem to be solved.

Disclosure of Invention

Based on this, the embodiment of the application provides a power adapter with higher output power.

The adapter is used for charging equipment to be charged, and comprises a plurality of adapter circuits and a charging interface which are connected in series, wherein two ends of the plurality of adapter circuits which are connected in series are respectively and electrically connected with the charging interface;

the plurality of adapter circuits are used for switching the output state of at least one adapter circuit in the plurality of adapter circuits under the condition that a first electric energy parameter of the charging electric energy output by the power adapter through the charging interface is inconsistent with a second electric energy parameter of the charging electric energy required by the device to be charged.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

in addition, in the power adapter provided by the embodiment of the present application, the plurality of adapter circuits are used for switching the output state of at least one adapter circuit in the plurality of adapter circuits under the condition that a first power parameter of the charging power output by the power adapter through the charging interface is inconsistent with a second power parameter of the charging power required by the device to be charged, so that the charging power output by the power adapter can be ensured to be matched with the charging power required by the device to be charged Therefore, the output power is improved, and meanwhile, the compatibility of the power adapter with various devices to be charged and different charging stages of the devices to be charged can be guaranteed.

Drawings

Fig. 1 is a schematic diagram of a power adapter provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of a power adapter provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of a power adapter provided in an embodiment of the present application;

fig. 4 is a schematic diagram of a power adapter according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In practical applications, the electronic device generally needs to be charged through the power adapter, where the output power of the power adapter is closely related to the charging efficiency of the electronic device, and the charging efficiency of the electronic device is higher the output power of the power adapter is, and conversely, the charging efficiency of the electronic device is lower the output power of the power adapter is.

In view of the above, increasing the output power of the power adapter has become a widely discussed and studied problem in the industry, and the embodiment of the present application provides a power adapter with high output power.

In addition, in the power adapter provided in the embodiment of the present application, the plurality of adapter circuits are configured to switch the output state of at least one adapter circuit of the plurality of adapter circuits when a first power parameter of the charging power output by the power adapter through the charging interface is inconsistent with a second power parameter of the charging power required by the device to be charged, the charging electric energy output by the power adapter can be matched with the charging electric energy required by the equipment to be charged, so that the output power is improved, and the compatibility of the power adapter with various equipment to be charged and different charging stages of the equipment to be charged can be ensured.

Referring to fig. 1, which is a schematic diagram of a power adapter provided in an embodiment of the present application, the power adapter is used for charging a device to be charged, as shown in fig. 1, the power adapter includes a plurality of adapter circuits 10 and a charging interface 20 connected in series, and two ends of the plurality of adapter circuits 10 connected in series are respectively electrically connected to the charging interface 20.

When the output power of a single adapter circuit 10 is constant, the output power can be increased by a multiple by connecting a plurality of adapter circuits 10 in series, and for example, when the output power of a single adapter circuit 10 is 50W, the output power after connecting two adapter circuits 10 in series can be about 100W, and therefore, the technical scheme of connecting a plurality of adapter circuits 10 in series can increase the overall output power of the power adapter.

It should be noted that, as shown in fig. 1, the two adapter circuits 10 connected in series with each other means that: the VBUS pin of one of the adapter circuits 10 is connected to the GNDH pin of the other adapter circuit 10, and the plurality of adapter circuits 10 are connected in series with each other in the same manner as described above.

In an alternative embodiment of the present application, the adapter circuit 10 may be manufactured based on technologies without electrolytic capacitors and flat transformers, and in practical applications, the adapter circuit manufactured based on technologies without electrolytic capacitors and flat transformers is generally small in size, so that it is ensured that the size of the power adapter composed of a plurality of adapter circuits 10 is not too large.

In addition, compared with a power adapter consisting of a single adapter circuit manufactured based on the technology of the electrolytic-capacitor-free flat-plate transformer, the size of the power adapter provided by the embodiment of the application is not too small.

In practical application, if power adapter's volume is less, in order to guarantee safety, avoid in the use distance undersize between finger and power adapter's the contact pin, just need adopt the mode of infolding to place power adapter's contact pin in power adapter's inside, however, this can occupy a large amount of inner space of power adapter to bring more study cost of using power adapter for the user.

And power adapter's too big will be unfavorable for power adapter's accomodating, influences the flexibility and the convenience that power adapter used.

In view of the above circumstances, the power adapter provided in the embodiment of the present application is not too large in size on the one hand, and therefore, flexibility and convenience in use can be ensured, and on the other hand, is not too small in size, and therefore, the inward-folded contact pin can be prevented from occupying the internal space of the power adapter, and more learning cost for using the power adapter is prevented from being brought to a user.

In an alternative embodiment of the present application, the charging interface 20 may be a USB interface, a Type-C interface, or the like, and the specific Type of the charging interface 20 is not limited in this embodiment of the present application.

In the embodiment of the present application, the plurality of adapter circuits 10 are configured to switch the output state of at least one adapter circuit 10 in the plurality of adapter circuits 10 when a first power parameter of the charging power output by the power adapter through the charging interface 20 is inconsistent with a second power parameter of the charging power required by the device to be charged.

In this application embodiment, the electric energy parameter may be a voltage, or may be another parameter used for representing the charging electric energy, and this application embodiment does not limit a specific type of the electric energy parameter.

In an alternative embodiment of the present application, the plurality of adapter circuits 10 are specifically configured to: under the condition that the first electric energy parameter is inconsistent with the second electric energy parameter, switching the electric energy parameter of the charging electric energy output by the at least one adapter circuit 10 according to the difference between the second electric energy parameter and the first electric energy parameter; alternatively, in the case where the first power parameter is not consistent with the second power parameter, the at least one adapter circuit 10 is controlled to stop outputting the charging power.

For example, if the power adapter only has one adapter circuit 10 to output charging power currently, and the voltage of the output charging power is 5V, the voltage of the charging power output by the power adapter as a whole is 5V, and if the voltage of the charging power required by the device to be charged is 10V, one adapter circuit 10 other than the adapter circuit 10 that is outputting the charging power currently can be controlled to output the charging power according to the voltage of 5V, so that the voltage of the charging power output by the power adapter can reach 10V, and the requirement of the device to be charged on the charging power can be met.

For another example, if the power adapter has two adapter circuits 10 outputting charging power currently, and the voltages of the charging power output by the two adapter circuits 10 are both 5V, the voltage of the charging power output by the power adapter as a whole is 10V, and if the voltage of the charging power required by the device to be charged is 5V, one adapter circuit 10 outputting the charging power currently can be controlled to stop outputting the charging power, so that the voltage of the charging power output by the power adapter can be reduced to 5V, and the requirement of the device to be charged on the charging power can be met.

As can be seen from the above description, since the plurality of adapter circuits 10 can switch the output state of at least one adapter circuit 10 when the first power parameter is inconsistent with the second power parameter, it can be ensured that the charging power output by the power adapter can match with the charging power required by the device to be charged, and thus, while the output power is increased, the compatibility of the power adapter with various devices to be charged and different charging stages of the device to be charged can also be ensured.

In addition, it should be noted that, taking the power parameter as an example of the voltage, the range of the voltage output by a single adapter circuit is generally narrow, and in the embodiment of the present application, since the power adapter includes a plurality of adapter circuits connected in series, the range of the voltage output by the power adapter is the superposition of the ranges of the voltages output by the respective adapter circuits, and therefore, the range of the voltage output by the power adapter is larger, and therefore, the compatibility of the power adapter with various devices to be charged and different charging stages of the devices to be charged can be further ensured.

For example, if a single adapter circuit outputs a voltage in the range of 5V to 10V, the two adapter circuits may output voltages in series in the range of 5V (only one adapter circuit operating at the lowest voltage output) to 20V (both adapter circuits operating at the highest voltage output).

Next, in the embodiments of the present application, a mode of switching an output state of at least one adapter circuit among a plurality of adapter circuits will be described.

First, the plurality of serially connected adapter circuits 10 described above may include a master adapter circuit and at least one slave adapter circuit, wherein the master adapter circuit is communicatively connected to the charging interface 20 and each slave adapter circuit, respectively, and the master adapter circuit continuously outputs charging power after the power adapter is powered on.

The master adapter circuit is configured to receive a charging request sent by a device to be charged through the charging interface 20, where the charging request carries a second power parameter, and is configured to control at least one slave adapter circuit to switch an output state when the first power parameter and the second power parameter are inconsistent.

In an optional embodiment of the present application, the master adapter circuit is specifically configured to send a first state switching control signal to the at least one slave adapter circuit when the first power parameter and the second power parameter are inconsistent, where the first state switching control signal is used to instruct the slave adapter circuit to switch the output state according to the first state switching control signal.

Optionally, after the power adapter is powered on, the master adapter circuit may continuously output the charging power, and each slave adapter circuit does not output the charging power, at this time, the master adapter circuit may monitor whether a charging request sent by the device to be charged is received, and compare whether the first power parameter and the second power parameter are consistent after the charging request is received.

If the second power parameter is greater than the first power parameter, in a possible implementation manner, the master adapter circuit may adjust the charging power output by the master adapter circuit based on a difference between the second power parameter and the first power parameter, so as to adapt the charging power output by the power adapter circuit to the charging power required by the device to be charged.

If the second power parameter is smaller than the first power parameter, the host adapter circuit may adjust the charging power output by the host adapter circuit based on a difference between the second power parameter and the first power parameter, so that the charging power output by the power adapter is adapted to the charging power required by the device to be charged.

Then, the host adapter circuit may continue to monitor whether a charging request sent by the device to be charged is received, and compare whether the first power parameter and the second power parameter are consistent after the charging request is received.

If the second power parameter is greater than the first power parameter, in one possible implementation, the master adaptor circuit may adjust the charging power output by the master adaptor circuit based on a difference between the second power parameter and the first power parameter, so as to adapt the charging power output by the power adaptor to the charging power required by the device to be charged, in another possible implementation, the master adaptor circuit may control the slave adaptor circuit that is currently outputting the charging power to increase the power parameter of the output charging power based on a difference between the second power parameter and the first power parameter, so as to adapt the charging power output by the power adaptor to the charging power required by the device to be charged, in yet another possible implementation, the master adaptor circuit may control the slave adaptor circuit that is not currently outputting the charging power based on a difference between the second power parameter and the first power parameter, therefore, the charging electric energy output by the power adapter is matched with the charging electric energy required by the equipment to be charged.

If the second power parameter is smaller than the first power parameter, in one possible implementation, the master adaptor circuit may adjust the charging power output by the master adaptor circuit based on a difference between the second power parameter and the first power parameter, so as to adapt the charging power output by the power adaptor to the charging power required by the device to be charged, in another possible implementation, the master adaptor circuit may control the slave adaptor circuit currently outputting the charging power to stop outputting the charging power based on a difference between the second power parameter and the first power parameter, so as to adapt the charging power output by the power adaptor to the charging power required by the device to be charged, in yet another possible implementation, the master adaptor circuit may control the slave adaptor circuit currently outputting the charging power to reduce the power parameter of the output charging power based on a difference between the second power parameter and the first power parameter, so that the charging electric energy output by the power adapter is matched with the charging electric energy required by the equipment to be charged.

In an optional embodiment of the present application, the master adapter circuit is further configured to control each slave adapter circuit to maintain the output state unchanged when the first power parameter is consistent with the second power parameter, or when a charging request sent by the device to be charged is not received.

Optionally, the master adapter circuit is specifically configured to periodically send a state maintaining control signal to each slave adapter circuit when the first power parameter is consistent with the second power parameter, or when a charging request sent by the device to be charged is not received, where the state maintaining control signal is used to instruct each slave adapter circuit to maintain the output state unchanged.

Meanwhile, each slave adapter circuit is also used for maintaining the output state unchanged after receiving the state maintaining control signal.

In the embodiment of the present application, the function of the master adapter circuit sending the state maintaining control signal to each slave adapter circuit is to indicate each slave adapter circuit to maintain the output state unchanged, and to notify each slave adapter circuit that the master adapter circuit is in the normal operating state and has not failed.

In an optional embodiment of the present application, each slave adapter circuit is further configured to stop outputting the charging power when the control signal sent by the master adapter circuit is not received within a preset time period. The control signal sent by the master adapter circuit may include the state maintaining control signal described above, and may also include a control signal instructing the slave adapter circuit to change the output state, for example, the first state switching control signal described above.

As can be seen from the above description, if the master adapter circuit does not send any control signal for a preset time period, it can be determined that the master adapter circuit is in an abnormal operating state and has failed, and at this time, the slave adapter circuits lose the control of the master adapter circuit, and in this case, the slave adapter circuits can stop outputting the charging power for safety.

In an optional embodiment of the present application, a watchdog self-check program may be preset in each slave adapter circuit, and each slave adapter circuit may detect whether it has not received a control signal sent by the master adapter circuit within a preset time period based on the watchdog self-check program. In an alternative embodiment of the present application, the preset time period may be 10s, of course, the 10s is only an example, and the specific size of the preset time period is not limited in the embodiment of the present application.

Referring to fig. 2, in an alternative embodiment of the present application, the power adapter further includes at least one switch circuit 30 (only one switch circuit 30 is exemplarily shown in fig. 2) in one-to-one correspondence with at least one slave adapter circuit S101 (only 1 slave adapter circuit S101 is exemplarily shown in fig. 2), each switch circuit 30 is connected in parallel with the corresponding slave adapter circuit S101, each switch circuit 30 is communicatively connected with the corresponding slave adapter circuit S101 (illustration of communication connection is not shown in fig. 2), and each switch circuit 30 is in a normally open state.

Each slave adapter circuit S101 is further configured to control the corresponding switch circuit 30 to be closed when the control signal sent by the master adapter circuit H101 is not received within the preset time period.

In an alternative embodiment of the present application, the switching circuit 30 may be implemented based on MOS transistors.

As shown in fig. 2, when the switch circuit 30 is in the open state, both the slave adapter circuit S101 and the master adapter circuit H101 can output the charging electric energy to the charging interface 20, and since the switch circuit 30 is connected in parallel to the slave adapter circuit S101, when the switch circuit 30 is closed, the slave adapter circuit S101 cannot output the charging electric energy to the charging interface 20.

Thus, in the embodiment of the present application, if the control signal sent by the master adapter circuit H101 is not received within the preset time period, that is, if it is determined that the master adapter circuit H101 is in the abnormal operating state and has failed, at this time, each slave adapter circuit S101 loses the control of the master adapter circuit H101, in this case, in view of safety, each slave adapter circuit S101 may not only stop outputting the charging power, but also control the corresponding switch circuit 30 to close, so as to further ensure that the slave adapter circuit S101 cannot output the charging power.

Referring to fig. 3, in an alternative embodiment of the present application, the master adapter circuit H101 includes a master processing component HC, and each slave adapter circuit S101 (only 1 slave adapter circuit S101 is exemplarily shown in fig. 3) includes a slave processing component SC, wherein the master processing component HC and each slave processing component SC are connected by a clock line (clk line) and a data line (data line).

Optionally, the master processing component HC and each slave processing component SC may be MCUs, the master processing component HC may implement functions such as comparing the first power parameter with the second power parameter and generating a control signal, and the slave processing component SC may implement functions such as monitoring whether a control signal is received within a preset time period and controlling the slave adapter circuit S101 to switch the state of outputting the charging power to the charging interface 20 according to the control of the master processing component HC, where the control signal may include the above-mentioned state maintaining control signal or may include a control signal instructing the slave adapter circuit to change the output state, for example, the above-mentioned first state switching control signal.

Of course, the master processing component HC and the slave processing component SC may also implement other processing, calculating and controlling functions related to charging, which is not described in detail herein in this embodiment of the present application.

In the embodiment of the present application, the master processing component HC and each slave processing component SC may perform unidirectional communication based on the clock line and the data line, that is, in the embodiment of the present application, the master processing component HC may transmit data to the slave processing component SC unidirectionally through the clock line and the data line.

Optionally, during each communication between the master processing component HC and the slave processing component SC, the master processing component HC may send a clock pulse signal to the slave processing component SC through the clock line, where the clock pulse signal may include n (for example, n may be equal to 16) clock pulses, and at the same time as sending the clock pulse signal, the master processing component HC may send data, which may be the control signal described above, to the slave processing component SC through the data line, where the size of the data sent by the master processing component HC to the slave processing component SC is n bits. The slave processing component SC may read 1 bit of data from the data line at the instant of the rising edge of the clock pulse signal.

In the following, the embodiment of the present application will describe 16 bits included in the electrical first state switching control signal by taking n equal to 16 as an example.

For example, the data on the 1 st to 8 th bits may indicate an output voltage value, the 9 th to 11 th bits are charging power output control bits, that is, the data on the 9 th to 11 th bits may indicate whether to output charging power, and the 12 th to 15 th bits are data headers, which may be 1111 in a normal case.

In addition to the master processing component HC and the slave processing component SC may communicate through a clock line and a data line, in an alternative embodiment of the present application, the master processing component HC and the slave processing component SC may also communicate through a bus communication manner similar to I2C or similar to SPI, which is not specifically limited in this embodiment of the present application.

In the embodiment of the present application, the power adapter further includes at least one logic level conversion circuit 40 (only 1 logic level conversion circuit 40 is exemplarily shown in fig. 3) corresponding to each slave processing component SC, and each logic level conversion circuit 40 is connected in series to the clock line and the data line between the master processing component HC and the corresponding slave processing component SC.

Each logic level conversion circuit 40 is configured to convert the logic level of a signal transmitted on the clock line and the data line connected in series, based on the reference ground of the master adapter circuit H101 and the corresponding slave adapter circuit S101.

In the embodiment of the present application, the master processing component HC and the slave processing component SC can communicate with each other on the secondary side of the transformer of the adapter, and therefore, since the reference of the master adapter circuit H101 and the slave adapter circuit S101 are different, it is necessary to perform the conversion processing of the logic level to realize the communication between the master adapter circuit H101 and the slave adapter circuit S101.

In an alternative embodiment of the present application, the master processing component HC and the slave processing component SC may also communicate at the primary level of the transformer of the adapter, in which case, the logic level conversion process may not be required, and the logic level conversion circuit 40 is not required.

Referring to fig. 4, in an alternative embodiment of the present application, the power adapter may further include an adapter midplane 50, wherein the charging interface 20, each switch circuit 30, and each logic level conversion circuit 40 may be disposed on the adapter midplane 50.

It is to be noted that, for the sake of simplicity of illustration, only the master adapter circuit H101 and one slave adapter circuit S101 are exemplarily shown in fig. 4, and accordingly, only one switch circuit 30 and one logic level conversion circuit 40 are also shown.

Since adapter midplane 50 is only provided with charging interface 20, switch circuit 30 and logic level shift circuit 40, adapter midplane 50 is thin, and its thickness is about the same as the thickness of PCB. In alternative embodiments of the present application, the adapter midplane 50 may be disposed between two adapter circuits, e.g., the adapter midplane 50 may be disposed between a master adapter circuit H101 and a slave adapter circuit S101, and further e.g., in the case of a power adapter comprising a plurality of slave adapter circuits S101, the adapter midplane 50 may be disposed between two slave adapter circuits S101.

While the above description has been made of a first manner of switching the output state of at least one of the plurality of adapter circuits, the present embodiment will be described of a second manner of switching the output state of at least one of the plurality of adapter circuits.

In the second mode, the power adapter may further include a control circuit, and the control circuit is communicatively connected to each adapter circuit 10 and the charging interface 20.

The control circuit is configured to receive a charging request sent by a device to be charged through the charging interface 20, where the charging request carries a second power parameter, compare whether the first power parameter and the second power parameter are consistent, and control the at least one adapter circuit 10 to switch the output state when the first power parameter and the second power parameter are inconsistent.

In an optional embodiment of the present application, the control circuit is specifically configured to send a second state switching control signal to the at least one adapter circuit when the first power parameter and the second power parameter are inconsistent, where the second state switching control signal is used to instruct the adapter circuit to switch the output state according to the second state switching control signal.

In the second mode, the adapter circuit is not divided into a master adapter circuit and a slave adapter circuit, and a dedicated control circuit is provided for controlling each adapter circuit included in the power adapter by the control circuit, without controlling the other slave adapter circuits by the master adapter circuit.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.

Claims

1. A power adapter is used for charging equipment to be charged and is characterized by comprising a plurality of adapter circuits and a charging interface which are connected in series, wherein two ends of the plurality of adapter circuits which are connected in series are respectively and electrically connected with the charging interface;

the adapter circuits are used for switching the output state of at least one adapter circuit in the adapter circuits under the condition that a first electric energy parameter of the charging electric energy output by the power adapter through the charging interface is inconsistent with a second electric energy parameter of the charging electric energy required by the device to be charged.

2. The power adapter as described in claim 1, wherein said plurality of adapter circuits are specifically configured to: under the condition that the first electric energy parameter is inconsistent with the second electric energy parameter, switching at least one electric energy parameter of the charging electric energy output by the adapter circuit according to the difference between the second electric energy parameter and the first electric energy parameter; alternatively, the first and second electrodes may be,

and under the condition that the first power parameter is inconsistent with the second power parameter, controlling at least one adapter circuit to stop outputting the charging power.

3. The power adapter as claimed in claim 1, wherein the plurality of adapter circuits includes a master adapter circuit and at least one slave adapter circuit, the master adapter circuit being communicatively connected to the charging interface and each of the slave adapter circuits, respectively, the master adapter circuit continuously outputting charging power after the power adapter circuit is powered on;

the master adapter circuit is used for receiving a charging request sent by the equipment to be charged through the charging interface, wherein the charging request carries the second electric energy parameter;

the master adapter circuit is further configured to control at least one slave adapter circuit to switch an output state when the first power parameter and the second power parameter are inconsistent.

4. The power adapter as recited in claim 3,

the master adapter circuit is specifically configured to send a first state switching control signal to at least one of the slave adapter circuits when the first power parameter and the second power parameter are inconsistent, where the first state switching control signal is used to instruct the slave adapter circuit to switch an output state according to the first state switching control signal.

5. The power adapter as recited in claim 3,

the master adapter circuit is further configured to control each slave adapter circuit to maintain an output state unchanged when the first power parameter is consistent with the second power parameter or when the charging request sent by the device to be charged is not received.

6. The power adapter as recited in claim 5,

the master adapter circuit is specifically configured to periodically send a state maintaining control signal to each slave adapter circuit when the first power parameter is consistent with the second power parameter or when the charging request sent by the device to be charged is not received, where the state maintaining control signal is used to instruct each slave adapter circuit to maintain an output state unchanged.

7. The power adapter as recited in claim 6,

and each slave adapter circuit is used for stopping outputting the charging electric energy under the condition that the control signal sent by the master adapter circuit is not received within a preset time period.

8. The power adapter as claimed in claim 7, further comprising at least one switching circuit in one-to-one correspondence with the at least one slave adapter circuit, each switching circuit connected in parallel with a corresponding slave adapter circuit, each switching circuit communicatively connected with a corresponding slave adapter circuit, each switching circuit being in a normally open state;

each slave adapter circuit is further configured to control the corresponding switch circuit to be closed when the control signal sent by the master adapter circuit is not received within the preset time period.

9. The power adapter as claimed in claim 8, wherein the master adapter circuit comprises a master processing component, each of the slave adapter circuits comprises a slave processing component, and the master processing component and each of the slave processing components are connected by a clock line and a data line;

the power adapter further comprises at least one logic level conversion circuit corresponding to each slave processing assembly one to one, and each logic level conversion circuit is connected in series to the clock line and the data line between the master processing assembly and the corresponding slave processing assembly;

each of the logic level conversion circuits is configured to perform conversion processing on the logic levels of the signals transmitted on the clock line and the data line connected in series according to the reference ground of the master adapter circuit and the corresponding slave adapter circuit.

10. The power adapter as claimed in claim 9, further comprising an adapter midplane, wherein the charging interface, each of the switch circuits and each of the logic level shift circuits are disposed on the adapter midplane.

11. The power adapter as described in claim 10, wherein said adapter midplane is disposed between two of said adapter circuits.

12. The power adapter as claimed in claim 1, further comprising a control circuit, wherein the control circuit is communicatively connected to each of the adapter circuits and the charging interface, respectively;

the control circuit is used for receiving a charging request sent by the equipment to be charged through the charging interface, wherein the charging request carries the second electric energy parameter;

the control circuit is further configured to control at least one of the adapter circuits to switch an output state when the first power parameter and the second power parameter are inconsistent.

13. The power adapter as recited in claim 12,

the control circuit is specifically configured to send a second state switching control signal to at least one adapter circuit when the first power parameter and the second power parameter are inconsistent, where the second state switching control signal is used to instruct the adapter circuit to switch an output state according to the second state switching control signal.