Charging management circuit, charging system, electronic device and charging method

Abstract

The present application provides a charging management circuit, a charging system, an electronic device and a charging method. A DCDC conversion circuit in the charging management circuit comprises seven bridge arms and four capacitors. By means of controlling the bridge arms, the connection relationship between the capacitors can be adjusted, so as to obtain an output voltage that meets requirements, thereby realizing charging management. Moreover, the entirety of the first to seventh bridge arms and the four capacitors in the DCDC conversion circuit can be regarded as a single-phase switched-capacitor circuit, and therefore in the DCDC conversion circuit, compared with the DCDC conversion circuits in the prior art that comprise a two-phase switched-capacitor circuit, the number of switched-capacitor circuits is reduced, thereby avoiding the design redundancy in switches, so that the driving losses and switching losses can be reduced and the charging efficiency can be improved, and the footprint of the charging management circuit can also be reduced.

Description

A charging management circuit, a charging system, an electronic device and a charging method

[0001] Cross Reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202410444062.5, filed on April 10, 2024, and entitled "A charging management circuit, a charging system, an electronic device and a charging method", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the field of electronic technology, and in particular to a charging management circuit, a charging system, an electronic device and a charging method. BACKGROUND

[0004] With the continuous improvement of the charging power of electronic devices, the structure of the DCDC conversion circuit in the high-power charging scene is becoming more and more complex. The complex DCDC conversion circuit not only increases the number of transistors, but also increases the corresponding driving design module, resulting in large driving loss and switching loss, and also increases the occupied area of the DCDC conversion circuit, which is not conducive to the miniaturization design of the electronic device. SUMMARY

[0005] The present application provides a charging management circuit, a charging system, an electronic device and a charging method, which can reduce the occupied area of the charging management circuit, reduce the driving loss and switching loss, and improve the charging efficiency.

[0006] In a first aspect, the embodiments of the present application provide a charging management circuit, which comprises a DCDC conversion circuit, and the DCDC conversion circuit comprises: a first bridge arm, a second bridge arm, a third bridge arm, a fourth bridge arm, a fifth bridge arm, a sixth bridge arm, a seventh bridge arm, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor; the first end of the first bridge arm is connected with the first end of the first capacitor and the first end of the fifth bridge arm respectively, the second end of the first bridge arm is connected with the first end of the fourth capacitor and the first end of the third bridge arm respectively, and the bridge arm midpoint of the first bridge arm is connected with the first input and output end of the DCDC conversion circuit; the first end of the second bridge arm is connected with the first end of the second capacitor and the bridge arm midpoint of the third bridge arm respectively, the second end of the second bridge arm is connected with the ground end, and the bridge arm midpoint of the second bridge arm is connected with the second end of the first capacitor; the first end of the third bridge arm is also connected with the first end of the fourth capacitor, the second end of the third bridge arm is connected with the first end of the fourth bridge arm and the second input and output end of the DCDC conversion circuit respectively, and the bridge arm midpoint of the third bridge arm is also connected with the first end of the second capacitor; the first end of the fourth bridge arm is also connected with the second input and output end, the second end of the fourth bridge arm is connected with the ground end, and the bridge arm midpoint of the fourth bridge arm is connected with the second end of the second capacitor; the first end of the fifth bridge arm is also connected with the first end of the first capacitor, the second end of the fifth bridge arm is connected with the first end of the sixth bridge arm and the second input and output end respectively, and the bridge arm midpoint of the fifth bridge arm is connected with the first end of the third capacitor and the first end of the seventh bridge arm respectively; the first end of the sixth bridge arm is also connected with the second input and output end, the second end of the sixth bridge arm is connected with the ground end, and the bridge arm midpoint of the sixth bridge arm is connected with the second end of the third capacitor; and the first end of the seventh bridge arm is also connected with the first end of the third capacitor, the second end of the seventh bridge arm is connected with the ground end, and the bridge arm midpoint of the seventh bridge arm is connected with the second end of the fourth capacitor.

[0007] Thus, in the DCDC conversion circuit, the connection relationship between the capacitors can be adjusted through the cooperation of the seven bridge arms, so that the required output voltage is obtained, and the charging management is realized. Moreover, the whole formed by the first bridge arm to the seventh bridge arm and the four capacitors can be regarded as a single-phase switched capacitor circuit. Compared with the DCDC conversion circuit comprising a two-phase switched capacitor circuit in the prior art, the number of switched capacitor circuits is reduced, and the design redundancy of the switch is avoided, so that not only the driving loss and the switching loss can be reduced, the charging efficiency can be improved, but also the occupied area of the charging management circuit can be reduced.

[0008] Optionally, the charging management circuit further comprises a controller connected with the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm respectively; the controller is configured to: in response to the first DC signal input from the first input / output terminal, control the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm to convert the first DC signal and output the converted first DC signal from the second input / output terminal; or in response to the second DC signal input from the second input / output terminal, control the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm to convert the second DC signal and output the converted second DC signal from the first input / output terminal. In this way, the charging management circuit can not only realize forward input, but also realize reverse output, thereby enriching the functions of the charging management circuit and expanding the application range of the charging management circuit.

[0009] Optionally, the first bridge arm comprises: a first bridge arm switch and a second bridge arm switch, a control electrode of the first bridge arm switch is connected with the controller, a first electrode of the first bridge arm switch is connected with the first end of the first capacitor and the first end of the fifth bridge arm respectively, and a second electrode of the first bridge arm switch is connected with the first input / output terminal and a second electrode of the second bridge arm switch; a control electrode of the second bridge arm switch is connected with the controller, a first electrode of the second bridge arm switch is connected with the first end of the fourth capacitor and the first end of the third bridge arm respectively, and a second electrode of the second bridge arm switch is further connected with the first input / output terminal; wherein the second electrode of the first bridge arm switch can be used as a bridge arm midpoint of the first bridge arm, the first electrode of the first bridge arm switch can be used as a first end of the first bridge arm, and the first electrode of the second bridge arm switch can be used as a second end of the first bridge arm.

[0010] The second bridge arm comprises: a third bridge arm switch and a fourth bridge arm switch, a control electrode of the third bridge arm switch is connected with the controller, a first electrode of the third bridge arm switch is connected with the second end of the first capacitor and a second electrode of the fourth bridge arm switch respectively, and a second electrode of the third bridge arm switch is connected with the first end of the second capacitor and a bridge arm midpoint of the third bridge arm respectively; a control electrode of the fourth bridge arm switch is connected with the controller, a first electrode of the fourth bridge arm switch is connected with the ground terminal, and a second electrode of the fourth bridge arm switch is further connected with the second end of the first capacitor; wherein the first electrode of the third bridge arm switch can be used as a bridge arm midpoint of the second bridge arm, the second electrode of the third bridge arm switch can be used as a first end of the second bridge arm, and the first electrode of the fourth bridge arm switch can be used as a second end of the second bridge arm.

[0011] The third bridge arm can include a fifth bridge arm switch and a sixth bridge arm switch, a control electrode of the fifth bridge arm switch being connected with the controller, a first electrode of the fifth bridge arm switch being connected with a first end of the second capacitor and a second electrode of the sixth bridge arm switch respectively, and a second electrode of the fifth bridge arm switch being connected with a first end of the fourth capacitor and a second end of the first bridge arm respectively; a control electrode of the sixth bridge arm switch being connected with the controller, a first electrode of the sixth bridge arm switch being connected with a first end of the fourth bridge arm, a second input-output end of the DCDC conversion circuit, a second end of the fifth bridge arm and a first end of the sixth bridge arm respectively, and a second electrode of the sixth bridge arm switch being further connected with the first end of the second capacitor; wherein the first electrode of the fifth bridge arm switch can be used as a bridge arm midpoint of the third bridge arm, the second electrode of the fifth bridge arm switch can be used as a first end of the third bridge arm, and the first electrode of the sixth bridge arm switch can be used as a second end of the third bridge arm.

[0012] The fourth bridge arm can include a seventh bridge arm switch and an eighth bridge arm switch, a control electrode of the seventh bridge arm switch being connected with the controller, a first electrode of the seventh bridge arm switch being connected with a second end of the second capacitor and a second electrode of the eighth bridge arm switch respectively, and a second electrode of the seventh bridge arm switch being connected with the second input-output end; a control electrode of the eighth bridge arm switch being connected with the controller, a first electrode of the eighth bridge arm switch being connected with the ground end, and a second electrode of the eighth bridge arm switch being further connected with the second end of the second capacitor; wherein the first electrode of the seventh bridge arm switch can be used as a bridge arm midpoint of the fourth bridge arm, the second electrode of the seventh bridge arm switch can be used as a first end of the fourth bridge arm, and the first electrode of the eighth bridge arm switch can be used as a second end of the fourth bridge arm.

[0013] The fifth bridge arm can include a ninth bridge arm switch and a tenth bridge arm switch, a control electrode of the ninth bridge arm switch being connected with the controller, a first electrode of the ninth bridge arm switch being connected with a first end of the third capacitor, a first end of the seventh bridge arm and a second electrode of the tenth bridge arm switch respectively, and a second electrode of the ninth bridge arm switch being connected with a first end of the first capacitor and a first end of the first bridge arm respectively; a control electrode of the tenth bridge arm switch being connected with the controller, a first electrode of the tenth bridge arm switch being connected with the second input-output end, and a second electrode of the tenth bridge arm switch being further connected with the first end of the third capacitor; wherein the first electrode of the ninth bridge arm switch can be used as a bridge arm midpoint of the fifth bridge arm, the second electrode of the ninth bridge arm switch can be used as a first end of the fifth bridge arm, and the first electrode of the tenth bridge arm switch can be used as a second end of the fifth bridge arm.

[0014] The sixth bridge arm can include an eleventh bridge arm switch and a twelfth bridge arm switch, a control electrode of the eleventh bridge arm switch being connected with the controller, a first electrode of the eleventh bridge arm switch being connected with a second end of the third capacitor and a second electrode of the twelfth bridge arm switch respectively, and a second electrode of the eleventh bridge arm switch being connected with the second input and output end; a control electrode of the twelfth bridge arm switch being connected with the controller, a first electrode of the twelfth bridge arm switch being connected with the ground end, and a second electrode of the twelfth bridge arm switch being further connected with the second end of the third capacitor; wherein the first electrode of the eleventh bridge arm switch can be used as a bridge arm midpoint of the sixth bridge arm, the second electrode of the eleventh bridge arm switch can be used as a first end of the sixth bridge arm, and the first electrode of the twelfth bridge arm switch can be used as a second end of the sixth bridge arm.

[0015] The seventh bridge arm can include a thirteenth bridge arm switch and a fourteenth bridge arm switch, a control electrode of the thirteenth bridge arm switch being connected with the controller, a first electrode of the thirteenth bridge arm switch being connected with a second end of the fourth capacitor and a second electrode of the fourteenth bridge arm switch respectively, and a second electrode of the thirteenth bridge arm switch being connected with a first end of the third capacitor; a control electrode of the fourteenth bridge arm switch being connected with the controller, a first electrode of the fourteenth bridge arm switch being connected with the ground end, and a second electrode of the fourteenth bridge arm switch being further connected with the second end of the fourth capacitor; wherein the first electrode of the thirteenth bridge arm switch can be used as a bridge arm midpoint of the seventh bridge arm, the second electrode of the thirteenth bridge arm switch can be used as a first end of the seventh bridge arm, and the first electrode of the fourteenth bridge arm switch can be used as a second end of the seventh bridge arm.

[0016] Optionally, the working process of the charging management circuit can include the following cases:

[0017] In case 1, the controller is specifically configured to control the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm to switch between the first mode and the second mode. In the first mode, the bridge arm switch between the first end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on (i.e., the first bridge arm switch is turned on), the bridge arm switch between the first end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on (i.e., the third bridge arm switch is turned on), the bridge arm switch between the first end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on (i.e., the fifth bridge arm switch is turned on), the bridge arm switch between the first end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on (i.e., the seventh bridge arm switch is turned on), the bridge arm switch between the second end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on (i.e., the tenth bridge arm switch is turned on), the bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on (i.e., the twelfth bridge arm switch is turned on), and the bridge arm switch between the second end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on (i.e., the fourteenth bridge arm switch is turned on). In the second mode, the bridge arm switch between the second end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on (i.e., the second bridge arm switch is turned on), the bridge arm switch between the second end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on (i.e., the fourth bridge arm switch is turned on), the bridge arm switch between the second end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on (i.e., the sixth bridge arm switch is turned on), the bridge arm switch between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on (i.e., the eighth bridge arm switch is turned on), the bridge arm switch between the first end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on (i.e., the ninth bridge arm switch is turned on), the bridge arm switch between the first end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on (i.e., the eleventh bridge arm switch is turned on), and the bridge arm switch between the first end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on (i.e., the thirteenth bridge arm switch is turned on). In this way, the controller can realize the input and output of electric energy from the first input and output end and the second input and output end, and the input and output of electric energy from the second input and output end and the first input and output end, thereby realizing the forward input and reverse output of electric energy and expanding the application range of the charging management circuit.

[0018] Further, the voltage transmitted through the first input and output end is four times the voltage transmitted through the second input and output end. Thus, when electric energy is input from the first input and output end and output from the second input and output end, the input voltage can be stepped down; when electric energy is input from the second input and output end and output from the first input and output end, the input voltage can be stepped up.

[0019] In case 2, the DCDC conversion circuit further comprises a first voltage control unit, and the first voltage control unit is connected with the first end of the second capacitor, the bridge arm midpoint of the third bridge arm, the first output end of the DCDC conversion circuit and the controller respectively. The controller is further configured to control the first voltage control unit, the third bridge arm and the fourth bridge arm to output the second DC signal from the first output end after boosting the second DC signal in response to the second DC signal input from the second input / output end. In this way, when the battery needs to supply power to the high-voltage load and the high-voltage load is connected to the first output end, the battery can input power from the second input / output end and output the power from the first output end after processing, so as to supply power to the high-voltage load through the cooperation of the first voltage control unit, the third bridge arm and the fourth bridge arm. In addition, when the high-voltage load needs a higher voltage, the second DC signal input from the second input / output end can also be boosted to meet the voltage requirement of the high-voltage load. It should be understood that when the charging management circuit and the battery are applied to an electronic device, the high-voltage load can be a high-voltage motor, an intelligent power amplifier or other high-voltage devices in the electronic device, which can be set according to actual needs, and is not limited here.

[0020] The first voltage control unit comprises a first switch and a first inductor, the control electrode of the first switch is connected with the controller, the first electrode of the first switch is connected with the first end of the second capacitor and the bridge arm midpoint of the third bridge arm respectively, and the second electrode of the first switch is connected with the first end of the first inductor. The second end of the first inductor is connected with the first output end.

[0021] In addition, the controller is specifically configured to control the first voltage control unit, the third bridge arm and the fourth bridge arm to switch between the first mode and the second mode in response to the second DC signal input from the second input / output end. The first mode comprises a state in which the first switch is turned on and the bridge arm switch between the first end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on (i.e., the seventh bridge arm switch is turned on). The second mode comprises a state in which the first switch is turned on, the bridge arm switch between the second end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on (i.e., the sixth bridge arm switch is turned on), and the bridge arm switch between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on (i.e., the eighth bridge arm switch is turned on). In this way, the voltage input from the second input / output end can be boosted to meet the voltage requirement of the high-voltage load.

[0022] Case 3: The DCDC conversion circuit further comprises a second voltage control unit, the second voltage control unit is connected with the first end of the third capacitor, the bridge arm midpoint of the fifth bridge arm, the second output end of the DCDC conversion circuit and the controller respectively; the controller is further configured to: in response to the second DC signal input from the second input / output end, control the second voltage control unit, the fifth bridge arm and the sixth bridge arm to output the second DC signal after boosting the voltage of the second DC signal from the second output end. In this way, when the battery needs to supply power to the high-voltage load and the high-voltage load is connected to the second output end, the battery can input power from the second input / output end and output it from the second output end after processing, so as to realize power supply to the high-voltage load; and when the high-voltage load needs a higher voltage, the second DC signal input from the second input / output end can also be boosted to meet the voltage demand of the high-voltage load.

[0023] The second voltage control unit comprises a second switch and a second inductor, the control electrode of the second switch is connected with the controller, the first electrode of the second switch is connected with the first end of the third capacitor and the bridge arm midpoint of the fifth bridge arm respectively, and the second electrode of the second switch is connected with the first end of the second inductor; the second end of the second inductor is connected with the second output end.

[0024] The controller is specifically configured to: in response to the second DC signal input from the second input / output end, control the second voltage control unit, the fifth bridge arm and the sixth bridge arm to switch between the first mode and the second mode; wherein the first mode comprises the state that the second switch is turned on, the bridge arm switch located between the second end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on (i.e. the tenth bridge arm switch is turned on), and the bridge arm switch located between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on (i.e. the twelfth bridge arm switch is turned on); the second mode comprises the state that the second switch is turned on and the bridge arm switch located between the first end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on (i.e. the eleventh bridge arm switch is turned on). Thus, the voltage input from the second input / output end is boosted to meet the voltage demand of the high-voltage load.

[0025] In case 4, the controller is specifically configured to control the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm to switch between the first mode and the second mode. In the first mode, the bridge arm switch between the first end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on (i.e., the first bridge arm switch is turned on), the bridge arm switch between the first end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on (i.e., the third bridge arm switch is turned on), all the bridge arm switches in the third bridge arm are turned on (i.e., the fifth bridge arm switch and the sixth bridge arm switch are turned on), the bridge arm switch between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on (i.e., the eighth bridge arm switch is turned on), the bridge arm switch between the second end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on (i.e., the tenth bridge arm switch is turned on), the bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on (i.e., the twelfth bridge arm switch is turned on), and the bridge arm switch between the second end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on (i.e., the fourteenth bridge arm switch is turned on). In the second mode, the bridge arm switch between the second end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on (i.e., the second bridge arm switch is turned on), the bridge arm switch between the second end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on (i.e., the fourth bridge arm switch is turned on), the bridge arm switch between the second end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on (i.e., the sixth bridge arm switch is turned on), the bridge arm switch between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on (i.e., the eighth bridge arm switch is turned on), all the bridge arm switches in the fifth bridge arm are turned on (i.e., the ninth bridge arm switch and the tenth bridge arm switch are turned on), the bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on (i.e., the twelfth bridge arm switch is turned on), and the bridge arm switch between the first end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on (i.e., the thirteenth bridge arm switch is turned on). In this way, the controller can realize the input and output of electric energy from the first input and output end and the second input and output end, and the input and output of electric energy from the second input and output end and the first input and output end, thereby realizing the forward input and reverse output of electric energy and expanding the application range of the charging management circuit.

[0026] Further, the voltage transmitted through the first input and output end is twice the voltage transmitted through the second input and output end. Thus, when the electric energy is input from the first input and output end and output from the second input and output end, the input voltage can be stepped down, and when the electric energy is input from the second input and output end and output from the first input and output end, the input voltage can be stepped up.

[0027] In case 5, the controller is specifically configured to control the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm to be in a first mode. The first mode includes: all the bridge arm switches in the first bridge arm being turned on (i.e., the first bridge arm switch and the second bridge arm switch being turned on), the bridge arm switch between the second end of the second bridge arm and the bridge arm midpoint of the second bridge arm being turned on (i.e., the fourth bridge arm switch being turned on), all the bridge arm switches in the third bridge arm being turned on (i.e., the fifth bridge arm switch and the sixth bridge arm switch being turned on), the bridge arm switch between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm being turned on (i.e., the eighth bridge arm switch being turned on), all the bridge arm switches in the fifth bridge arm being turned on (i.e., the ninth bridge arm switch and the tenth bridge arm switch being turned on), the bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm being turned on (i.e., the twelfth bridge arm switch being turned on), and the bridge arm switch between the second end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm being turned on (i.e., the fourteenth bridge arm switch being turned on). In this way, the controller can control the working modes of the seven bridge arms to achieve the input of electric energy from the first input and output end and the output of electric energy from the second input and output end, and the input of electric energy from the second input and output end and the output of electric energy from the first input and output end, thereby achieving the forward input and reverse output of electric energy and expanding the application range of the charging management circuit.

[0028] Further, the voltage transmitted through the first input and output end is the same as the voltage transmitted through the second input and output end. Thus, the input of electric energy from the first input and output end and the output of electric energy from the second input and output end can be achieved, the input of electric energy from the second input and output end and the output of electric energy from the first input and output end can also be achieved, and electric energy loss can be avoided.

[0029] It should be understood that the above five cases can be used alone or in combination, wherein the three cases of case 1, case 2 and case 3 can be randomly combined when used in combination, such as but not limited to: case 1 and case 2 are combined, case 2 and case 3 are combined, case 1 and case 3 are combined, or case 1, case 2 and case 3 are combined, which can be determined according to actual conditions and is not limited herein.

[0030] In addition, in the present application, each switch and each bridge arm switch can be, but is not limited to, a switching device with a control terminal, such as a field effect transistor, a triode, etc., which can be designed according to actual needs and is not limited herein. Taking the switch and the bridge arm switch as a field effect transistor as an example, the control terminal is the gate, the first terminal is the source, and the second terminal is the drain; or the first terminal is the drain, and the second terminal is the source.

[0031] In a second aspect, the embodiments of the present application further provide a charging system, which can include: a charging device and at least one power receiving device, the power receiving device including: a battery, and the charging management circuit as described in the first aspect and any one of the embodiments of the first aspect; the battery being connected with the second input / output terminal of the DC / DC conversion circuit in the charging management circuit; the charging device being configured to provide electric energy to the charging management circuit; and the charging management circuit being configured to charge the battery by using the electric energy, thereby improving the charging efficiency of the charging system for the battery.

[0032] It should be understood that, since the principle of solving the problem of the charging system is similar to the principle of solving the problem of the charging management circuit, the implementation and technical effects of the charging system can be referred to the implementation and technical effects of the charging management circuit, and the repeated parts will not be described herein.

[0033] In a third aspect, the embodiments of the present application further provide an electronic device, which can include: the charging management circuit as described in the first aspect and any one of the embodiments of the first aspect, and the battery, the second input / output terminal of the DC / DC conversion circuit in the charging management circuit being connected with the battery, thereby improving the charging efficiency of the electronic device.

[0034] It should be understood that, since the principle of solving the problem of the electronic device is similar to the principle of solving the problem of the charging management circuit, the implementation and technical effects of the electronic device can be referred to the implementation and technical effects of the charging management circuit, and the repeated parts will not be described herein.

[0035] In a fourth aspect, the embodiments of the present application also provide a charging method, which is used for charging by using the charging management circuit according to the first aspect and any one of the embodiments of the first aspect. The charging method can include: the controller, in response to the first direct current signal input from the first input / output terminal of the DCDC conversion circuit, controls the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to convert the first direct current signal and output the converted first direct current signal from the second input / output terminal of the DCDC conversion circuit; or, in response to the second direct current signal input from the second input / output terminal, controls the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to convert the second direct current signal and output the converted second direct current signal from the first input / output terminal; wherein the first end of the first bridge arm is connected with the first end of the first capacitor and the first end of the fifth bridge arm respectively, the second end of the first bridge arm is connected with the first end of the fourth capacitor and the first end of the third bridge arm respectively, and the bridge arm midpoint of the first bridge arm is connected with the first input / output terminal of the DCDC conversion circuit; the first end of the second bridge arm is connected with the first end of the second capacitor and the bridge arm midpoint of the third bridge arm respectively, the second end of the second bridge arm is connected with the ground terminal, and the bridge arm midpoint of the second bridge arm is connected with the second end of the first capacitor; the first end of the third bridge arm is also connected with the first end of the fourth capacitor, the second end of the third bridge arm is connected with the first end of the fourth bridge arm and the second input / output terminal of the DCDC conversion circuit respectively, and the bridge arm midpoint of the third bridge arm is also connected with the first end of the second capacitor; the first end of the fourth bridge arm is also connected with the second input / output terminal, the second end of the fourth bridge arm is connected with the ground terminal, and the bridge arm midpoint of the fourth bridge arm is connected with the second end of the second capacitor; the first end of the fifth bridge arm is also connected with the first end of the first capacitor, the second end of the fifth bridge arm is connected with the first end of the sixth bridge arm and the second input / output terminal respectively, and the bridge arm midpoint of the fifth bridge arm is connected with the first end of the third capacitor and the first end of the seventh bridge arm respectively; the first end of the sixth bridge arm is also connected with the second input / output terminal, the second end of the sixth bridge arm is connected with the ground terminal, and the bridge arm midpoint of the sixth bridge arm is connected with the second end of the third capacitor; and the first end of the seventh bridge arm is also connected with the first end of the third capacitor, the second end of the seventh bridge arm is connected with the ground terminal, and the bridge arm midpoint of the seventh bridge arm is connected with the second end of the fourth capacitor.

[0036] Thus, in the DCDC conversion circuit, the connection relationship between the capacitors can be adjusted by the cooperation of the seven bridge arms, so that the required output voltage is obtained, and the charging management is realized. Moreover, the whole of the first bridge arm to the seventh bridge arm and the four capacitors can be regarded as a single-phase switched capacitor circuit. Compared with the DCDC conversion circuit including a two-phase switched capacitor circuit in the prior art, the number of switched capacitor circuits is reduced, and the design redundancy of the switch is avoided, so that not only the driving loss and the switching loss can be reduced, the charging efficiency can be improved, but also the occupied area of the charging management circuit can be reduced.

[0037] Optionally, in response to the first direct current signal input from the first input / output terminal of the DCDC conversion circuit, the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm are controlled to convert the first direct current signal and output the converted first direct current signal from the second input / output terminal of the DCDC conversion circuit; or, in response to the second direct current signal input from the second input / output terminal, the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm are controlled to convert the second direct current signal and output the converted second direct current signal from the first input / output terminal, which comprises: controlling the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm to switch between the first mode and the second mode; wherein the first mode comprises: the state that the bridge arm switch between the first end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on, the bridge arm switch between the first end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, the bridge arm switch between the first end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on, the bridge arm switch between the first end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, the bridge arm switch between the second end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on, the bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and the bridge arm switch between the second end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on; the second mode comprises: the state that the bridge arm switch between the second end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on, the bridge arm switch between the second end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, the bridge arm switch between the second end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on, the bridge arm switch between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, the bridge arm switch between the first end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on, the bridge arm switch between the first end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and the bridge arm switch between the first end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on. In this way, the controller can realize the input of electric energy from the first input / output terminal and the output of electric energy from the second input / output terminal, and also realize the input of electric energy from the second input / output terminal and the output of electric energy from the first input / output terminal by controlling the working mode of the seven bridge arms, thereby realizing the forward input and reverse output of electric energy and expanding the application range of the charging management circuit.

[0038] Optionally, the charging method further comprises: the controller controls the first voltage control unit, the third bridge arm and the fourth bridge arm to output the second DC signal from the first output end of the DCDC conversion circuit after boosting the second DC signal in response to the second DC signal input from the second input output end; wherein the DCDC conversion circuit comprises the first voltage control unit, and the first voltage control unit is connected with the first end of the second capacitor, the bridge arm midpoint of the third bridge arm, the first output end and the controller respectively. In this way, when the battery needs to supply power to the high-voltage load and the high-voltage load is connected to the first output end, the cooperation of the first voltage control unit, the third bridge arm and the fourth bridge arm can input the power provided by the battery from the second input output end and output from the first output end after a certain processing, so as to realize the power supply to the high-voltage load; and when the high-voltage load needs a higher voltage, the second DC signal input from the second input output end can also be boosted to meet the voltage demand of the high-voltage load.

[0039] Further, in response to the second DC signal input from the second input output end, the controller controls the first voltage control unit, the third bridge arm and the fourth bridge arm to output the second DC signal from the first output end of the DCDC conversion circuit after boosting the second DC signal, comprising: in response to the second DC signal input from the second input output end, the controller controls the first voltage control unit, the third bridge arm and the fourth bridge arm to switch between the first mode and the second mode; wherein the first voltage control unit comprises: a first switch and a first inductor, the control electrode of the first switch is connected with the controller, the first electrode of the first switch is connected with the first end of the second capacitor and the bridge arm midpoint of the third bridge arm respectively, and the second electrode of the first switch is connected with the first end of the first inductor; the second end of the first inductor is connected with the first output end; the first mode comprises: the state that the first switch is turned on and the bridge arm switch located between the first end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on; the second mode comprises: the state that the first switch is turned on, the bridge arm switch located between the second end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on, and the bridge arm switch located between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on. Thus, the voltage input from the second input output end is boosted to meet the voltage demand of the high-voltage load.

[0040] Optionally, the charging method further comprises: the controller controls the second voltage control unit, the fifth bridge arm and the sixth bridge arm to output the second DC signal from the second output end of the DCDC conversion circuit after boosting the second DC signal in response to the second DC signal input from the second input output end; wherein the DCDC conversion circuit comprises the second voltage control unit, and the second voltage control unit is connected with the first end of the third capacitor, the bridge arm midpoint of the fifth bridge arm, the second output end and the controller respectively. In this way, when the battery needs to supply power to the high-voltage load and the high-voltage load is connected to the second output end, the cooperation of the second voltage control unit, the fifth bridge arm and the sixth bridge arm can input the power provided by the battery from the second input output end and output from the second output end after a certain processing, so as to realize the power supply to the high-voltage load; and when the high-voltage load needs a higher voltage, the second DC signal input from the second input output end can also be boosted to meet the voltage demand of the high-voltage load.

[0041] Further, in response to the second DC signal input from the second input output end, the second voltage control unit, the fifth bridge arm and the sixth bridge arm output the second DC signal from the second output end of the DCDC conversion circuit after boosting the second DC signal, comprising: in response to the second DC signal input from the second input output end, the second voltage control unit, the fifth bridge arm and the sixth bridge arm are switched between the first mode and the second mode; wherein the second voltage control unit comprises: a second switch and a second inductor, the control electrode of the second switch is connected with the controller, the first electrode of the second switch is connected with the first end of the third capacitor and the bridge arm midpoint of the fifth bridge arm respectively, and the second electrode of the second switch is connected with the first end of the second inductor; the second end of the second inductor is connected with the second output end; the first mode comprises: the state that the second switch is turned on, the bridge arm switch located between the second end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on, and the bridge arm switch located between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on; the second mode comprises: the state that the second switch is turned on and the bridge arm switch located between the first end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on. Thus, the voltage input from the second input output end is boosted to meet the voltage demand of the high-voltage load.

[0042] Optionally, in response to the first direct current signal input from the first input / output terminal of the DCDC conversion circuit, the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm are controlled to convert the first direct current signal and output the converted first direct current signal from the second input / output terminal of the DCDC conversion circuit; or, in response to the second direct current signal input from the second input / output terminal, the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm are controlled to convert the second direct current signal and output the converted second direct current signal from the first input / output terminal, which comprises: controlling the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm to switch between the first mode and the second mode; wherein the first mode comprises: the state that the bridge arm switch between the first end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on, the bridge arm switch between the first end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, each bridge arm switch in the third bridge arm is turned on, the bridge arm switch between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, the bridge arm switch between the second end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on, the bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and the bridge arm switch between the second end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on; the second mode comprises: the state that the bridge arm switch between the second end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on, the bridge arm switch between the second end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, the bridge arm switch between the second end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on, the bridge arm switch between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, each bridge arm switch in the fifth bridge arm is turned on, the bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and the bridge arm switch between the first end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on. In this way, the controller can realize the input of electric energy from the first input / output terminal and the output of electric energy from the second input / output terminal, and also realize the input of electric energy from the second input / output terminal and the output of electric energy from the first input / output terminal by controlling the working mode of the seven bridge arms, thereby realizing the forward input and reverse output of electric energy and expanding the application range of the charging management circuit.

[0043] Optionally, in response to the first direct current signal input from the first input / output terminal of the DCDC conversion circuit, the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm are controlled to convert the first direct current signal and output the converted first direct current signal from the second input / output terminal of the DCDC conversion circuit; or, in response to the second direct current signal input from the second input / output terminal, the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm are controlled to convert the second direct current signal and output the converted second direct current signal from the first input / output terminal, including: controlling the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm and the seventh bridge arm to be in a first mode; wherein the first mode includes: a state in which all the bridge arm switches in the first bridge arm are turned on, the bridge arm switch between the second end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, all the bridge arm switches in the third bridge arm are turned on, the bridge arm switch between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, all the bridge arm switches in the fifth bridge arm are turned on, the bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and the bridge arm switch between the second end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on. In this way, the controller can realize input of electric energy from the first input / output terminal and output of electric energy from the second input / output terminal, and also realize input of electric energy from the second input / output terminal and output of electric energy from the first input / output terminal by controlling the working modes of the seven bridge arms, thereby realizing forward input and reverse output of electric energy and expanding the application range of the charging management circuit.

[0044] It should be understood that, since the principle of solving the problem of the charging method is similar to that of the charging management circuit, the implementation and technical effects of the charging method can be referred to the implementation and technical effects of the charging management circuit, and the repeated parts will not be described herein. BRIEF DESCRIPTION OF DRAWINGS

[0045] FIG. 1 is a structural schematic diagram of a charging system provided by an embodiment of the present application;

[0046] FIG. 2 is a structural schematic diagram of a charging management circuit provided by an embodiment of the present application;

[0047] FIG. 3 is a working principle schematic diagram of the structure shown in FIG. 2;

[0048] FIG. 4 is a structural schematic diagram of another charging management circuit provided by an embodiment of the present application;

[0049] FIG. 5 is a working principle schematic diagram of the structure shown in FIG. 4;

[0050] FIG. 6 is a structural schematic diagram of still another charging management circuit provided by an embodiment of the present application;

[0051] FIG. 7 is a working principle schematic diagram of the structure shown in FIG. 6;

[0052] FIG. 8 is a structural schematic diagram of still another charging management circuit provided by an embodiment of the present application;

[0053] FIG. 9 is another working principle schematic diagram of the structure shown in FIG. 2;

[0054] FIG. 10 is still another working principle schematic diagram of the structure shown in FIG. 2. DETAILED DESCRIPTION

[0055] In order to make the purposes, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings.

[0056] It should be noted that the same reference signs in the drawings of the present application represent the same or similar structures, and thus repeated descriptions thereof will be omitted. The expressions of position and direction described in the present application are described with the drawings as an example, but changes can also be made as needed, and the changes made are all included in the protection scope of the present application. The drawings of the present application are only used to show the relative position relationship and do not represent the real proportion.

[0057] In order to facilitate the understanding of the technical solutions provided by the embodiments of the present application, the application scenarios thereof will be first described below.

[0058] The technical solutions provided by the embodiments of the present application can be applied to a charging system, which can include a charging device and a power receiving device. The charging device can charge the battery in the power receiving device, so that the charging device can be normally used. When the charging system is a wireless charging system, the coil in the power receiving device and the coil of the charging device can generate electromagnetic induction after the power receiving device approaches the charging device. Energy (or electric energy, or wireless charging signal) is transmitted from the charging device to the power receiving device. At this time, the charging device can be but is not limited to a wireless charger, a wireless power bank, etc. When the charging system is a wired charging system, the charging device is connected with the power receiving device, and the charging device transmits a direct current charging signal to the power receiving device. At this time, the charging device can be but is not limited to a wired charger, a wired power bank, etc. It should be understood that if the charging device is a wired charger or a wireless charger, the charging device needs to be connected with a power supply when charging the power receiving device. If the charging device is a wired power bank or a wireless power bank, the charging device can not be connected with a power supply.

[0059] Fig. 1 shows a schematic diagram of a charging system. As shown in Fig. 1, the electronic device A includes a DCDC conversion circuit, a controller and a battery. When charging the battery in the electronic device A, the DCDC conversion circuit, the controller and the battery constitute a power receiving device. A charging device connected to the transmission end p1 of the electronic device A can provide power for the power receiving device. The controller controls the DCDC conversion circuit to charge the battery. At this time, the transmission end p1 can be regarded as a first input / output end of the DCDC conversion circuit connected to the charging device, and the transmission end p1 serves as a signal input port. The transmission end p2 can be regarded as a second input / output end of the DCDC conversion circuit connected to the battery, and the transmission end p2 serves as a signal output port. Such a charging process can be referred to as forward input. In addition, the electronic device A can also perform reverse charging on the electronic device B. At this time, the electronic device B serves as a power receiving device, and the DCDC conversion circuit, the controller and the battery constitute a charging device. The charging device can use the power of the internal battery to charge the electronic device B. At this time, the transmission end p1 can be regarded as a first input / output end of the DCDC conversion circuit connected to the electronic device B, and the transmission end p1 serves as a signal output port. The transmission end p2 can be regarded as a second input / output end of the DCDC conversion circuit connected to the battery, and the transmission end p2 serves as a signal input port. Such a charging process can be referred to as reverse output. Thus, the forward input and the reverse output of the power are realized, and the charging system has more functions.

[0060] The electronic device A can be, but is not limited to, a mobile phone, a tablet, a smart wearable device, etc. Of course, the electronic device B can also be, but is not limited to, a mobile phone, a tablet, a smart wearable device, etc. It should be understood that the transmission end p1 can also be referred to as a node p1 for transmitting a signal, the transmission end p2 can also be referred to as a node p2 for transmitting a signal, the transmission end p1 and the node p1 have the same meaning, and the two can be used interchangeably. The transmission end p2 and the node p2 have the same meaning, and the two can be used interchangeably. In Fig. 1, the dashed line indicates that the node p1 can be connected to the charging device and the electronic device B.

[0061] With the continuous improvement of the charging power of electronic devices, the structure of the DCDC conversion circuit in the high-power charging scenario is becoming more and more complex. The complex DCDC conversion circuit not only increases the number of transistors, but also increases the corresponding driving design module, resulting in large driving loss and switching loss, and also increases the occupied area of the DCDC conversion circuit, which is not conducive to the miniaturization design of the electronic device.

[0062] Based on this, the embodiment of the present application provides a charging management circuit, a DCDC conversion circuit in the charging management circuit includes seven bridge arms and four capacitors, by controlling the bridge arms, the connection relationship between the capacitors can be adjusted, so that the required output voltage is obtained, and charging management is realized. Moreover, the whole of the first bridge arm to the seventh bridge arm and the four capacitors in the DCDC conversion circuit can be regarded as a single-phase switched capacitor circuit, compared with the DCDC conversion circuit including a two-phase switched capacitor circuit in the prior art, the number of switched capacitor circuits is reduced, the design redundancy of the switch is avoided, so that not only the driving loss and the switching loss can be reduced, the charging efficiency is improved, but also the occupied area of the charging management circuit can be reduced.

[0063] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiment of the present application will be further described in detail below with reference to the drawings. It should be understood that the drawings herein are only used to show the relative position relationship or connection relationship between the components, some components are exaggerated in drawing for easy understanding, and the shape and size of the components in the drawings do not reflect the true proportion relationship.

[0064] Fig. 2 illustrates a structure diagram of a charging management circuit according to an embodiment of the present application. Referring to Fig. 2, the charging management circuit can include a DCDC conversion circuit, which includes a first bridge arm F1, a second bridge arm F2, a third bridge arm F3, a fourth bridge arm F4, a fifth bridge arm F5, a sixth bridge arm F6, a seventh bridge arm F7, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4. The first end of the first bridge arm F1 is connected to the first end of the first capacitor C1 and the first end of the fifth bridge arm F5, the second end of the first bridge arm F1 is connected to the first end of the fourth capacitor C4 and the first end of the third bridge arm F3, and the bridge arm midpoint of the first bridge arm F1 is connected to the first input / output terminal (i.e., node p1) of the DCDC conversion circuit. The first end of the second bridge arm F2 is connected to the first end of the second capacitor C2 and the bridge arm midpoint of the third bridge arm F3, the second end of the second bridge arm F2 is connected to the ground terminal GND, and the bridge arm midpoint of the second bridge arm F2 is connected to the second end of the first capacitor C1. The first end of the third bridge arm F3 is also connected to the first end of the fourth capacitor C4, the second end of the third bridge arm F3 is connected to the first end of the fourth bridge arm F4 and the second input / output terminal (i.e., node p2) of the DCDC conversion circuit, and the bridge arm midpoint of the third bridge arm F3 is also connected to the first end of the second capacitor C2. The first end of the fourth bridge arm F4 is also connected to the second input / output terminal, the second end of the fourth bridge arm F4 is connected to the ground terminal GND, and the bridge arm midpoint of the fourth bridge arm F4 is connected to the second end of the second capacitor C2. The first end of the fifth bridge arm F5 is also connected to the first end of the first capacitor C1, the second end of the fifth bridge arm F5 is connected to the first end of the sixth bridge arm F6 and the second input / output terminal, and the bridge arm midpoint of the fifth bridge arm F5 is connected to the first end of the third capacitor C3 and the first end of the seventh bridge arm F7. The first end of the sixth bridge arm F6 is also connected to the second input / output terminal, the second end of the sixth bridge arm F6 is connected to the ground terminal GND, and the bridge arm midpoint of the sixth bridge arm F6 is connected to the second end of the third capacitor C3. The first end of the seventh bridge arm F7 is also connected to the first end of the third capacitor C3, the second end of the seventh bridge arm F7 is connected to the ground terminal GND, and the bridge arm midpoint of the seventh bridge arm F7 is connected to the second end of the fourth capacitor C4.

[0065] In this DCDC conversion circuit, the connection relationship between the capacitors can be adjusted through the cooperation of the seven bridge arms, so that the required output voltage is obtained, and the charging management is realized. Moreover, the first bridge arm F1 to the seventh bridge arm F7 and the four capacitors constitute a single-phase switched capacitor circuit. Compared with the DCDC conversion circuit including a two-phase switched capacitor circuit in the prior art, the number of switched capacitor circuits is reduced, and the design redundancy of the switch is avoided, so that not only the driving loss and the switching loss can be reduced, the charging efficiency can be improved, but also the occupied area of the charging management circuit can be reduced.

[0066] Exemplarily, the charging management circuit can further comprise a controller (not shown in FIG. 2) connected with the first bridge arm F1, the second bridge arm F2, the third bridge arm F3, the fourth bridge arm F4, the fifth bridge arm F5, the sixth bridge arm F6 and the seventh bridge arm F7 respectively; the controller is configured to: in response to the first DC signal input from the first input / output terminal, control the first bridge arm F1, the second bridge arm F2, the third bridge arm F3, the fourth bridge arm F4, the fifth bridge arm F5, the sixth bridge arm F6 and the seventh bridge arm F7 to convert the first DC signal and output the converted first DC signal from the second input / output terminal; or in response to the second DC signal input from the second input / output terminal, control the first bridge arm F1, the second bridge arm F2, the third bridge arm F3, the fourth bridge arm F4, the fifth bridge arm F5, the sixth bridge arm F6 and the seventh bridge arm F7 to convert the second DC signal and output the converted second DC signal from the first input / output terminal. That is, the first input / output terminal and the second input / output terminal can serve as both input ports and output ports, that is, when the signal is input from the first input / output terminal, the first input / output terminal serves as an input port, and correspondingly, the second input / output terminal serves as an output port; or when the signal is input from the second input / output terminal, the first input / output terminal serves as an output port, and correspondingly, the second input / output terminal serves as an input port. In this way, the charging management circuit can not only realize forward input, but also realize reverse output, thereby enriching the functions of the charging management circuit and expanding the application range of the charging management circuit.

[0067] Continuing to refer to FIG. 2, the first bridge arm F1 can comprise: a first bridge arm switch T1 and a second bridge arm switch T2, a control electrode of the first bridge arm switch T1 is connected with the controller, a first electrode of the first bridge arm switch T1 is connected with a first end of the first capacitor C1 and a first end of the fifth bridge arm F5 respectively, a second electrode of the first bridge arm switch T1 is connected with the first input / output terminal and a second electrode of the second bridge arm switch T2 respectively; a control electrode of the second bridge arm switch T2 is connected with the controller, a first electrode of the second bridge arm switch T2 is connected with a first end of the fourth capacitor C4 and a first end of the third bridge arm F3 respectively, a second electrode of the second bridge arm switch T2 is further connected with the first input / output terminal; wherein the second electrode of the first bridge arm switch T1 can serve as a bridge arm midpoint of the first bridge arm F1, the first electrode of the first bridge arm switch T1 can serve as a first end of the first bridge arm F1, and the first electrode of the second bridge arm switch T2 can serve as a second end of the first bridge arm F1.

[0068] The second bridge arm F2 can include: a third bridge arm switch T3 and a fourth bridge arm switch T4, a control electrode of the third bridge arm switch T3 being connected with the controller, a first electrode of the third bridge arm switch T3 being connected with a second end of the first capacitor C1 and a second electrode of the fourth bridge arm switch T4 respectively, a second electrode of the third bridge arm switch T3 being connected with a first end of the second capacitor C2 and a bridge arm midpoint of the third bridge arm F3 respectively; a control electrode of the fourth bridge arm switch T4 being connected with the controller, a first electrode of the fourth bridge arm switch T4 being connected with the ground terminal GND, and a second electrode of the fourth bridge arm switch T4 being further connected with the second end of the first capacitor C1; wherein the first electrode of the third bridge arm switch T3 can be used as the bridge arm midpoint of the second bridge arm F2, the second electrode of the third bridge arm switch T3 can be used as the first end of the second bridge arm F2, and the first electrode of the fourth bridge arm switch T4 can be used as the second end of the second bridge arm F2.

[0069] The third bridge arm F3 can include: a fifth bridge arm switch T5 and a sixth bridge arm switch T6, a control electrode of the fifth bridge arm switch T5 being connected with the controller, a first electrode of the fifth bridge arm switch T5 being connected with the first end of the second capacitor C2 and a second electrode of the sixth bridge arm switch T6 respectively, a second electrode of the fifth bridge arm switch T5 being connected with the first end of the fourth capacitor C4 and the second end of the first bridge arm F1 respectively; a control electrode of the sixth bridge arm switch T6 being connected with the controller, a first electrode of the sixth bridge arm switch T6 being connected with the first end of the fourth bridge arm F4, a second input and output terminal of the DCDC conversion circuit, a second end of the fifth bridge arm F5 and a first end of the sixth bridge arm F6 respectively, and a second electrode of the sixth bridge arm switch T6 being further connected with the first end of the second capacitor C2; wherein the first electrode of the fifth bridge arm switch T5 can be used as the bridge arm midpoint of the third bridge arm F3, the second electrode of the fifth bridge arm switch T5 can be used as the first end of the third bridge arm F3, and the first electrode of the sixth bridge arm switch T6 can be used as the second end of the third bridge arm F3.

[0070] The fourth bridge arm F4 can include: a seventh bridge arm switch T7 and an eighth bridge arm switch T8, a control electrode of the seventh bridge arm switch T7 being connected with the controller, a first electrode of the seventh bridge arm switch T7 being connected with the second end of the second capacitor C2 and a second electrode of the eighth bridge arm switch T8 respectively, and a second electrode of the seventh bridge arm switch T7 being connected with the second input and output terminal; a control electrode of the eighth bridge arm switch T8 being connected with the controller, a first electrode of the eighth bridge arm switch T8 being connected with the ground terminal GND, and a second electrode of the eighth bridge arm switch T8 being further connected with the second end of the second capacitor C2; wherein the first electrode of the seventh bridge arm switch T7 can be used as the bridge arm midpoint of the fourth bridge arm F4, the second electrode of the seventh bridge arm switch T7 can be used as the first end of the fourth bridge arm F4, and the first electrode of the eighth bridge arm switch T8 can be used as the second end of the fourth bridge arm F4.

[0071] The fifth bridge arm F5 can include: a ninth bridge arm switch T9 and a tenth bridge arm switch T10, a control electrode of the ninth bridge arm switch T9 is connected with the controller, a first electrode of the ninth bridge arm switch T9 is connected with the first end of the third capacitor C3, the first end of the seventh bridge arm F7 and the second electrode of the tenth bridge arm switch T10 respectively, and a second electrode of the ninth bridge arm switch T9 is connected with the first end of the first capacitor C1 and the first end of the first bridge arm F1 respectively; a control electrode of the tenth bridge arm switch T10 is connected with the controller, a first electrode of the tenth bridge arm switch T10 is connected with the second input and output end, and a second electrode of the tenth bridge arm switch T10 is also connected with the first end of the third capacitor C3; wherein the first electrode of the ninth bridge arm switch T9 can be used as the bridge arm midpoint of the fifth bridge arm F5, the second electrode of the ninth bridge arm switch T9 can be used as the first end of the fifth bridge arm F5, and the first electrode of the tenth bridge arm switch T10 can be used as the second end of the fifth bridge arm F5.

[0072] The sixth bridge arm F6 can include: an eleventh bridge arm switch T11 and a twelfth bridge arm switch T12, a control electrode of the eleventh bridge arm switch T11 is connected with the controller, a first electrode of the eleventh bridge arm switch T11 is connected with the second end of the third capacitor C3 and the second electrode of the twelfth bridge arm switch T12 respectively, and a second electrode of the eleventh bridge arm switch T11 is connected with the second input and output end; a control electrode of the twelfth bridge arm switch T12 is connected with the controller, a first electrode of the twelfth bridge arm switch T12 is connected with the ground end GND, and a second electrode of the twelfth bridge arm switch T12 is also connected with the second end of the third capacitor C3; wherein the first electrode of the eleventh bridge arm switch T11 can be used as the bridge arm midpoint of the sixth bridge arm F6, the second electrode of the eleventh bridge arm switch T11 can be used as the first end of the sixth bridge arm F6, and the first electrode of the twelfth bridge arm switch T12 can be used as the second end of the sixth bridge arm F6.

[0073] The seventh bridge arm F7 can include: a thirteenth bridge arm switch T13 and a fourteenth bridge arm switch T14, a control electrode of the thirteenth bridge arm switch T13 is connected with the controller, a first electrode of the thirteenth bridge arm switch T13 is connected with the second end of the fourth capacitor C4 and the second electrode of the fourteenth bridge arm switch T14 respectively, and a second electrode of the thirteenth bridge arm switch T13 is connected with the first end of the third capacitor C3; a control electrode of the fourteenth bridge arm switch T14 is connected with the controller, a first electrode of the fourteenth bridge arm switch T14 is connected with the ground end GND, and a second electrode of the fourteenth bridge arm switch T14 is also connected with the second end of the fourth capacitor C4; wherein the first electrode of the thirteenth bridge arm switch T13 can be used as the bridge arm midpoint of the seventh bridge arm F7, the second electrode of the thirteenth bridge arm switch T13 can be used as the first end of the seventh bridge arm F7, and the first electrode of the fourteenth bridge arm switch T14 can be used as the second end of the seventh bridge arm F7.

[0074] It should be understood that in this paper, various bridge arm switches can be but are not limited to: field effect transistors, triodes, and other switching devices with control terminals, which can be designed according to actual needs, and are not specifically limited here. Among them, taking the bridge arm switch as a field effect transistor as an example, the control electrode as the gate, the first electrode as the source, and the second electrode as the drain; or the first electrode as the drain, and the second electrode as the source. Moreover, when the bridge arm switch is a field effect transistor, it is not limited to a P-type transistor or an N-type transistor, and can be set according to actual needs.

[0075] Based on the structure shown in FIG. 2, the specific working process of the charging management circuit can include:

[0076] In one switching cycle, the controller can control the first bridge arm F1, the second bridge arm F2, the third bridge arm F3, the fourth bridge arm F4, the fifth bridge arm F5, the sixth bridge arm F6, and the seventh bridge arm F7 to switch between the first mode and the second mode; in a plurality of consecutive switching cycles, the seven bridge arms work in the first mode, the second mode, the first mode, the second mode, and so on in turn. In summary, the seven bridge arms work alternately between the first mode and the second mode. Among them, the switching cycle can be determined according to the preset switching frequency, which is not specifically limited here. Moreover, the first mode includes: the state of the first bridge arm switch T1 being turned on, the third bridge arm switch T3 being turned on, the fifth bridge arm switch T5 being turned on, the seventh bridge arm switch T7 being turned on, the tenth bridge arm switch T10 being turned on, the twelfth bridge arm switch T12 being turned on, and the fourteenth bridge arm switch T14 being turned on; the second mode includes: the state of the second bridge arm switch T2 being turned on, the fourth bridge arm switch T4 being turned on, the sixth bridge arm switch T6 being turned on, the eighth bridge arm switch T8 being turned on, the ninth bridge arm switch T9 being turned on, the eleventh bridge arm switch T11 being turned on, and the thirteenth bridge arm switch T13 being turned on. It should be understood that the switching timing between the modes can be designed according to actual needs, which is not specifically limited here.

[0077] In combination with FIG. 3, in the first mode: the second capacitor C2 and the third capacitor C3 are connected in series and then connected in parallel with the fourth capacitor C4 to form an integral whole, the integral whole is connected in series with the first capacitor C1 and then connected in parallel with the device X0, and the resistor R0 is connected in parallel with the third capacitor C3; in the second mode: the second capacitor C2 and the third capacitor C3 are connected in series and then connected in parallel with the first capacitor C1 to form an integral whole, the integral whole is connected in series with the fourth capacitor C4 and then connected in parallel with the device X0, and the resistor R0 is connected in parallel with the second capacitor C2.

[0078] If node p1 is an input port, node p2 is an output port, and device X0 is used to represent a power supply and resistance R0 is used to represent a battery, in the first mode, Vp1=Vc1+Vc4, Vc4=Vc2+Vc3, Vc3=Vp2; in the second mode, Vc2=Vp2. Based on this, if Vc1=Vc4, Vp1=4Vp2 can be calculated, so that the voltage input from node p1 is 4 times the voltage output from node p2, so that the voltage provided by the power supply is 4 times the voltage output to the battery. Similarly, if node p1 is an output port and node p2 is an input port, Vp1=4Vp2 is still satisfied, so the voltage input from node p2 is 0.25 times the voltage output from node p1. In this way, the voltage transmitted through the first input and output end is four times the voltage transmitted through the second input and output end.

[0079] It should be understood that, in the structure introduced above, the controllers involved can be the same controller, that is, each bridge arm is controlled by one controller; or, in the structure introduced above, the controllers involved can also be different controllers, that is, each bridge arm is controlled by multiple controllers, which can be designed according to actual needs, and is not specifically limited here. The specific structure of the controller can be any device that can realize the control function known to those skilled in the art, such as but not limited to a single-chip microcomputer, an FPGA (Field Programmable Gate Array), a central processing unit, etc., which is not limited here.

[0080] Fig. 4 illustrates a structure of a charging management circuit according to an embodiment of the present application. The charging management circuit in this embodiment is similar to the charging management circuit in Fig. 2, except that a first voltage control unit F8 is further provided. Specifically, the DCDC conversion circuit further includes the first voltage control unit F8, which is connected to the first end of the second capacitor C2, the bridge arm midpoint of the third bridge arm F3, the first output end (p3 in Fig. 4) of the DCDC conversion circuit, and a controller (not shown in Fig. 4). The controller is configured to control the first voltage control unit F8, the third bridge arm F3, and the fourth bridge arm F4 to output the second DC signal from the first output end after boosting the second DC signal in response to the second DC signal input from the second input / output end. In this way, when the battery needs to supply power to a high-voltage load (not shown in Fig. 4) connected to the first output end, the first voltage control unit F8, the third bridge arm F3, and the fourth bridge arm F4 can cooperate to input the power provided by the battery from the second input / output end and output the power from the first output end after processing, so as to supply power to the high-voltage load. In addition, when the high-voltage load needs a higher voltage, the second DC signal input from the second input / output end can be boosted to meet the voltage requirement of the high-voltage load. It should be understood that when the charging management circuit and the battery are applied to an electronic device, the high-voltage load can be a high-voltage motor, an intelligent power amplifier, or other high-voltage devices in the electronic device. The specific configuration can be determined according to actual requirements, which is not limited in this regard.

[0081] The first voltage control unit F8 can include a first switch M1 and a first inductor L1. The control electrode of the first switch M1 is connected to the controller. The first electrode of the first switch M1 is connected to the first end of the second capacitor C2 and the bridge arm midpoint of the third bridge arm F3. The second electrode of the first switch M1 is connected to the first end of the first inductor L1. The second end of the first inductor L1 is connected to the first output end.

[0082] Based on the structure shown in Fig. 4, the specific working process of the charging management circuit can include the following steps.

[0083] In one switching cycle, the controller controls the first pressure control unit F8, the third bridge arm F3 and the fourth bridge arm F4 to switch between the first mode and the second mode in response to the second DC signal input from the second input-output terminal; in a plurality of continuous switching cycles, the whole of the first pressure control unit F8, the third bridge arm F3 and the fourth bridge arm F4 works in the first mode, the second mode, the first mode, the second mode, and so on in turn, that is, the whole of the first pressure control unit F8, the third bridge arm F3 and the fourth bridge arm F4 works alternately between the first mode and the second mode. The switching cycle can be determined according to the preset switching frequency, which is not limited here. In addition, the first mode includes the state that the first switch M1 is turned on and the seventh bridge arm switch T7 is turned on, and the second mode includes the state that the first switch M1 is turned on, the sixth bridge arm switch T6 is turned on and the eighth bridge arm switch T8 is turned on.

[0084] In combination with FIG. 5, in the first mode, the first inductor L1 and the second capacitor C2 are connected in series between the first output terminal (such as node p3) and the second input-output terminal (such as node p2); in the second mode, the first inductor L1 is connected between the first output terminal and the second input-output terminal. Therefore, when the node p3 is used as an output port, the node p2 is used as an input port, and the resistor R0 is used to represent the battery, it can be obtained that Vp3=(2-D)*Vp2, and D is the time proportion of the first mode in each switching cycle, and the value of D is 0-1, wherein the specific value of D can be determined according to actual needs, which is not limited here. In this way, the voltage output from the first output terminal is 2-D times the voltage input from the second input-output terminal, and the voltage output from the first output terminal is always greater than the voltage input from the second input-output terminal, thereby realizing the voltage boosting process of the voltage input from the second input-output terminal and meeting the voltage demand of the high-voltage load.

[0085] And, in the first mode, in addition to the first switch M1 being turned on and the seventh bridge arm switch T7 being turned on, the first bridge arm switch T1, the third bridge arm switch T3, the fifth bridge arm switch T5, the tenth bridge arm switch T10, the twelfth bridge arm switch T12, and the fourteenth bridge arm switch T14 can also be set to be turned on. At this time, the connection relationship of each capacitor is shown in (a) of FIG. 5. The second capacitor C2 and the third capacitor C3 are connected in series and then connected in parallel with the fourth capacitor C4 to form an integral whole. The integral whole is connected in series with the first capacitor C1 and then connected in parallel with the device X0. The resistor R0 is connected in parallel with the third capacitor C3. Similarly, in the second mode, in addition to the first switch M1 being turned on and the sixth bridge arm switch T6 and the eighth bridge arm switch T8 being turned on, the second bridge arm switch T2, the fourth bridge arm switch T4, the ninth bridge arm switch T9, the eleventh bridge arm switch T11, and the thirteenth bridge arm switch T13 can also be set to be turned on. At this time, the connection relationship of each capacitor is shown in (a) of FIG. 5. The second capacitor C2 and the third capacitor C3 are connected in series and then connected in parallel with the first capacitor C1 to form an integral whole. The integral whole is connected in series with the fourth capacitor C4 and then connected in parallel with the device X0. The resistor R0 is connected in parallel with the second capacitor C2. Based on this, when the node p1 is used as an output port and the node p2 is used as an input port, Vp1=4Vp2 is satisfied. Therefore, the voltage input from the node p2 is 0.25 times the voltage output from the node p1.

[0086] That is, when the node p2 is used as an input port, the node p3 is used as an output port, and the node p1 is also used as an output port, the connection relationship between the devices can be shown in (a) of FIG. 5. When the node p2 is used as an input port, the node p3 is used as an output port, but the node p1 is not used as an output port, that is, the signal is input from the node p2 and output from the node p3, but not output from the node p1, the connection relationship between the devices can be shown in (b) of FIG. 5.

[0087] It should be understood that the charging management circuit structure in this embodiment is similar to the charging management circuit structure shown in FIG. 2 in the foregoing embodiment. For details, refer to the related description in the foregoing embodiment, and no further description is given here.

[0088] Fig. 6 exemplarily shows a structural schematic diagram of a charging management circuit provided in an embodiment of the present application. Referring to Fig. 6, the charging management circuit in this embodiment is basically similar to the charging management circuit shown in Fig. 2 in the foregoing embodiment in structure, except that a second voltage control unit F9 is further provided. Exemplarily, referring to Fig. 6, the DCDC conversion circuit can further include the second voltage control unit F9, which is connected with the first end of the third capacitor C3, the bridge arm midpoint of the fifth bridge arm F5, the second output end (indicated as p4 in Fig. 6) of the DCDC conversion circuit, and the controller respectively; the controller is further configured to control the second voltage control unit F9, the fifth bridge arm F5 and the sixth bridge arm F6 to output the second direct current signal from the second output end after boosting the second direct current signal in response to the second direct current signal input from the second input / output end. In this way, when the battery needs to supply power to a high-voltage load (not shown in Fig. 6) and the high-voltage load is connected with the second output end, the power provided by the battery can be input from the second input / output end and output from the second output end after certain processing through the cooperation of the second voltage control unit F9, the fifth bridge arm F5 and the sixth bridge arm F6, so as to realize the power supply to the high-voltage load; and when the high-voltage load needs a higher voltage, the second direct current signal input from the second input / output end can also be boosted to meet the voltage requirement of the high-voltage load. It should be understood that when the charging management circuit and the battery are applied in an electronic device, the high-voltage load can be a high-voltage motor, an intelligent power amplifier or other high-voltage devices in the electronic device, which can be set according to actual requirements and is not limited here.

[0089] The second voltage control unit F9 can include a second switch M2 and a second inductor L2. The control electrode of the second switch M2 is connected with the controller, the first electrode of the second switch M2 is connected with the first end of the third capacitor C3 and the bridge arm midpoint of the fifth bridge arm F5 respectively, and the second electrode of the second switch M2 is connected with the first end of the second inductor L2. The second end of the second inductor L2 is connected with the second output end.

[0090] Based on the structure shown in Fig. 6, the specific working process of the charging management circuit can include:

[0091] In one switching cycle, the controller controls the second voltage control unit F9, the fifth bridge arm F5 and the sixth bridge arm F6 to switch between the first mode and the second mode in response to the second DC signal input from the second input / output terminal; in a plurality of continuous switching cycles, the whole of the second voltage control unit F9, the fifth bridge arm F5 and the sixth bridge arm F6 works in the first mode, the second mode, the first mode, the second mode, and so on in turn, that is, the whole of the second voltage control unit F9, the fifth bridge arm F5 and the sixth bridge arm F6 works alternately between the first mode and the second mode. The switching cycle can be determined according to the preset switching frequency, which is not limited here. In addition, the first mode includes the state that the second switch M2 is turned on, the tenth bridge arm switch T10 is turned on, and the twelfth bridge arm switch T12 is turned on; the second mode includes the state that the second switch M2 is turned on and the eleventh bridge arm switch T11 is turned on.

[0092] In combination with FIG. 7, in the first mode, the second inductor L2 is connected between the second output terminal (such as node p4) and the second input / output terminal (such as node p2); in the second mode, the second inductor L2 and the third capacitor C3 are connected in series between the second output terminal and the second input / output terminal. Therefore, when the node p4 is used as an output port, the node p2 is used as an input port, and the resistor R0 is used to represent a battery, it can be obtained that Vp4=(2-D)*Vp2, and D is the time proportion of the second mode in each switching cycle, and the value of D is 0-1, wherein the specific value of D can be determined according to actual needs, which is not limited here. In this way, the voltage output from the second output terminal is 2-D times the voltage input from the second input / output terminal, and the voltage output from the second output terminal is always greater than the voltage input from the second input / output terminal, thereby realizing the voltage boosting process of the voltage input from the second input / output terminal and meeting the voltage demand of the high-voltage load.

[0093] In addition, in the first mode, in addition to the second switch M2 being turned on, the tenth bridge arm switch T10 being turned on, and the twelfth bridge arm switch T12 being turned on, the first bridge arm switch T1, the third bridge arm switch T3, the fifth bridge arm switch T5, the seventh bridge arm switch T7, and the fourteenth bridge arm switch T14 can also be turned on. At this time, the connection relationship of the capacitors is shown in (a) of FIG. 7. The second capacitor C2 and the third capacitor C3 are connected in series, and then connected in parallel with the fourth capacitor C4 to form an integral whole. The integral whole is connected in series with the first capacitor C1, and then connected in parallel with the device X0. The resistor R0 is connected in parallel with the third capacitor C3. Similarly, in the second mode, in addition to the second switch M2 being turned on and the eleventh bridge arm switch T11 being turned on, the second bridge arm switch T2, the fourth bridge arm switch T4, the sixth bridge arm switch T6, the eighth bridge arm switch T8, the ninth bridge arm switch T9, and the thirteenth bridge arm switch T13 can also be turned on. At this time, the connection relationship of the capacitors is shown in (a) of FIG. 7. The second capacitor C2 and the third capacitor C3 are connected in series, and then connected in parallel with the first capacitor C1 to form an integral whole. The integral whole is connected in series with the fourth capacitor C4, and then connected in parallel with the device X0. The resistor R0 is connected in parallel with the second capacitor C2. Based on this, when the node p1 is used as an output port and the node p2 is used as an input port, Vp1=4Vp2 is satisfied. Therefore, the voltage input from the node p2 is 0.25 times the voltage output from the node p1.

[0094] That is, when the node p2 is used as an input port, the node p4 is used as an output port, and the node p1 is also used as an output port, the connection relationship between the devices can be as shown in (a) of FIG. 7. When the node p2 is used as an input port, the node p4 is used as an output port, but the node p1 is not used as an output port, that is, the signal is input from the node p2 and output from the node p4, but will not be output from the node p1, the connection relationship between the devices can be as shown in (b) of FIG. 7.

[0095] It should be understood that the charging management circuit structure in this embodiment is similar to the charging management circuit structure shown in FIG. 2 of the foregoing embodiment. For details, refer to the related description in the foregoing embodiment, and no further description is given here.

[0096] FIG. 8 shows a structure diagram of a charging management circuit according to an embodiment of the present application. As shown in FIG. 8, the charging management circuit in this embodiment is basically similar to the charging management circuit structure shown in FIG. 2 of the foregoing embodiment. The difference is that the first voltage control unit F8 and the second voltage control unit F9 are further provided. As shown in FIG. 8, the DCDC conversion circuit can further include the first voltage control unit F8 and the second voltage control unit F9. In this way, the DCDC conversion circuit can be connected with multiple high-voltage loads (not shown in FIG. 8), thereby achieving power supply for the multiple high-voltage loads, so as to meet the needs of different application scenarios and improve the flexibility and practicability of the design.

[0097] It should be understood that the first voltage control unit F8 in this embodiment is similar to the first voltage control unit F8 in the charging management circuit shown in FIG. 4 in the foregoing embodiment in structure and working principle, and specific reference can be made to the related description of the charging management circuit shown in FIG. 4 in the foregoing embodiment. The second voltage control unit F9 in this embodiment is similar to the second voltage control unit F9 in the charging management circuit shown in FIG. 6 in the foregoing embodiment in structure and working principle, and specific reference can be made to the related description of the charging management circuit shown in FIG. 6 in the foregoing embodiment. The repeated parts will not be described herein again. In addition, the other structures of the charging management circuit in this embodiment are similar to the charging management circuit structure shown in FIG. 2 in the foregoing embodiment, and specific reference can be made to the related description in the foregoing embodiment. The repeated parts will not be described herein again.

[0098] The charging management circuit in this embodiment is the same as the charging management circuit shown in FIG. 2 in the foregoing embodiment in structure, and the difference lies in that the working process of the charging management circuit is different. Specifically, based on FIG. 2, the specific working process of the charging management circuit can include:

[0099] In one switching cycle, the controller can control the first bridge arm F1, the second bridge arm F2, the third bridge arm F3, the fourth bridge arm F4, the fifth bridge arm F5, the sixth bridge arm F6, and the seventh bridge arm F7 to switch between the first mode and the second mode. In a plurality of continuous switching cycles, the seven bridge arms work in the first mode, the second mode, the first mode, the second mode, and so on in turn. In summary, the seven bridge arms work alternately between the first mode and the second mode. The switching cycle can be determined according to the preset switching frequency, which is not limited herein. In addition, the first mode includes the state that the first bridge arm switch T1 is turned on, the third bridge arm switch T3 is turned on, the fifth bridge arm switch T5 is turned on, the sixth bridge arm switch T6 is turned on, the eighth bridge arm switch T8 is turned on, the tenth bridge arm switch T10 is turned on, the twelfth bridge arm switch T12 is turned on, and the fourteenth bridge arm switch T14 is turned on. The second mode includes the state that the second bridge arm switch T2 is turned on, the fourth bridge arm switch T4 is turned on, the sixth bridge arm switch T6 is turned on, the eighth bridge arm switch T8 is turned on, the ninth bridge arm switch T9 is turned on, the tenth bridge arm switch T10 is turned on, the twelfth bridge arm switch T12 is turned on, and the thirteenth bridge arm switch T13 is turned on. It should be understood that the switching time between the modes can be designed according to actual needs, which is not limited herein.

[0100] Referring to FIG. 9, in the first mode, the third capacitor C3, the fourth capacitor C4, the resistor R0, the second capacitor C2 are connected in parallel, and then connected in series with the first capacitor C1 to form an integral whole, and the integral whole is connected in parallel with the device X0; in the second mode, the third capacitor C3, the first capacitor C1, the resistor R0, the second capacitor C2 are connected in parallel, and then connected in series with the fourth capacitor C4 to form an integral whole, and the integral whole is connected in parallel with the device X0.

[0101] If the node p1 is an input port, the node p2 is an output port, and the device X0 is used to represent a power supply, and the resistor R0 is used to represent a battery, in the first mode, Vp1 = Vc1 + Vc2, Vc4 = Vc2 = Vc3 = Vp2; in the second mode, Vp1 = Vc3 + Vc4, Vc1 = Vc2 = Vc3 = Vp2. Based on this, it can be calculated that Vp1 = 2Vp2, so that the voltage input from the node p1 is twice the voltage output from the node p2, thereby realizing that the voltage provided by the power supply is twice the voltage output to the battery. Similarly, if the node p1 is an output port and the node p2 is an input port, Vp1 = 2Vp2 is still satisfied, so that the voltage input from the node p2 is 0.5 times the voltage output from the node p1. In this way, the voltage transmitted through the first input and output end is twice the voltage transmitted through the second input and output end.

[0102] It should be understood that the charging management circuit structure in this embodiment is similar to the charging management circuit structure shown in FIG. 2 of the foregoing embodiment, and the relevant description can be referred to in the foregoing embodiment, and the repeated parts will not be described herein.

[0103] The charging management circuit in this embodiment has the same structure as the charging management circuit shown in FIG. 2 of the foregoing embodiment, and the difference lies in that the working process of the charging management circuit is different. Exemplarily, based on FIG. 2, the specific working process of the charging management circuit can include:

[0104] In one switching cycle, the controller can control the first bridge arm F1, the second bridge arm F2, the third bridge arm F3, the fourth bridge arm F4, the fifth bridge arm F5, the sixth bridge arm F6, and the seventh bridge arm F7 to be in the first mode, that is, in this embodiment, the working mode of the DCDC conversion circuit does not switch, but always works in the first mode. The switching cycle can be determined according to the preset switching frequency, which is not limited herein. And the first mode includes the state that the first bridge arm switch T1 is turned on, the second bridge arm switch T2 is turned on, the fourth bridge arm switch T4 is turned on, the fifth bridge arm switch T5 is turned on, the sixth bridge arm switch T6 is turned on, the eighth bridge arm switch T8 is turned on, the ninth bridge arm switch T9 is turned on, the tenth bridge arm switch T10 is turned on, the twelfth bridge arm switch T12 is turned on, and the fourteenth bridge arm switch T14 is turned on.

[0105] Referring to FIG. 10, in the first mode, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the resistor R0 and the device X0 are all arranged in parallel. If the node p1 is used as an input port, the node p2 is used as an output port, and the device X0 is used to represent a power supply and the resistor R0 is used to represent a battery, Vp1 = Vc1 = Vc2 = Vc3 = Vc4 = Vp2, so Vp1 = Vp2, which means that the voltage input from the node p1 is the voltage output from the node p2, so that the voltage provided by the power supply is approximately the voltage output to the battery. Similarly, if the node p1 is used as an output port and the node p2 is used as an input port, Vp1 = Vp2 is still satisfied, so the voltage input from the node p2 is approximately the voltage output from the node p1. In this way, the voltage transmitted through the first input and output terminal is substantially the same as the voltage transmitted through the second input and output terminal.

[0106] It should be understood that the charging management circuit structure in this embodiment is similar to the charging management circuit structure shown in FIG. 2 in the foregoing embodiment, and the relevant description can be referred to in the foregoing embodiment, and the repeated parts will not be described herein.

[0107] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and the equivalent technology thereof, the present application also intends to include these modifications and variations.

Claims

1. A charging management circuit, characterized in that: The DCDC conversion circuit includes a first bridge arm, a second bridge arm, a third bridge arm, a fourth bridge arm, a fifth bridge arm, a sixth bridge arm, a seventh bridge arm, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor; The first end of the first bridge arm is connected to the first end of the first capacitor and the first end of the fifth bridge arm respectively, the second end of the first bridge arm is connected to the first end of the fourth capacitor and the first end of the third bridge arm respectively, and the midpoint of the first bridge arm is connected to the first input and output end of the DCDC conversion circuit; The first end of the second bridge arm is connected to the first end of the second capacitor and the midpoint of the third bridge arm respectively, the second end of the second bridge arm is connected to the ground end, and the midpoint of the second bridge arm is connected to the second end of the first capacitor; The first end of the third bridge arm is further connected to the first end of the fourth capacitor, the second end of the third bridge arm is respectively connected to the first end of the fourth bridge arm and the second input and output ends of the DCDC conversion circuit, and the midpoint of the third bridge arm is further connected to the first end of the second capacitor; The first end of the fourth bridge arm is also connected to the second input / output end, the second end of the fourth bridge arm is connected to the ground end, and the midpoint of the fourth bridge arm is connected to the second end of the second capacitor; The first end of the fifth bridge arm is further connected to the first end of the first capacitor, the second end of the fifth bridge arm is respectively connected to the first end of the sixth bridge arm and the second input and output end, and the midpoint of the fifth bridge arm is respectively connected to the first end of the third capacitor and the first end of the seventh bridge arm; The first end of the sixth bridge arm is further connected to the second input / output end, the second end of the sixth bridge arm is connected to the ground end, and the midpoint of the sixth bridge arm is connected to the second end of the third capacitor; The first end of the seventh bridge arm is also connected to the first end of the third capacitor, the second end of the seventh bridge arm is connected to the ground end, and the midpoint of the seventh bridge arm is connected to the second end of the fourth capacitor.

2. The charging management circuit according to claim 1, wherein: The charging management circuit further includes a controller, which is connected to the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm respectively; The controller is used to: in response to a first DC signal input from the first input / output end, control the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to convert the first DC signal and output it from the second input / output end; or, in response to a second DC signal input from the second input / output end, control the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to convert the second DC signal and output it from the first input / output end.

3. The charging management circuit according to claim 2, wherein: The controller is specifically configured to: control the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to switch between a first mode and a second mode; The first mode includes: a state in which a bridge arm switch between the first end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on, a bridge arm switch between the first end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, a bridge arm switch between the first end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on, a bridge arm switch between the first end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, a bridge arm switch between the second end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on, a bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and a bridge arm switch between the second end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on; The second mode includes: a bridge arm switch located between the second end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on, a bridge arm switch located between the second end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, a bridge arm switch located between the second end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on, a bridge arm switch located between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, a bridge arm switch located between the first end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on, a bridge arm switch located between the first end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and a bridge arm switch located between the first end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on.

4. The charging management circuit according to claim 3, wherein: The voltage transmitted through the first input and output terminal is four times the voltage transmitted through the second input and output terminal.

5. The charging management circuit according to any one of claims 2 to 4, characterized in that: The DCDC conversion circuit further includes: a first voltage control unit, the first voltage control unit being connected to the first end of the second capacitor, the midpoint of the third bridge arm, the first output end of the DCDC conversion circuit, and the controller respectively; The controller is further configured to: in response to the second DC signal input from the second input / output end, control the first voltage control unit, the third bridge arm, and the fourth bridge arm to boost the second DC signal and output the boosted signal from the first output end.

6. The charging management circuit according to claim 5, characterized in that: The first voltage control unit includes: a first switch and a first inductor, the control electrode of the first switch is connected to the controller, the first electrode of the first switch is respectively connected to the first end of the second capacitor and the midpoint of the third bridge arm, the second electrode of the first switch is connected to the first end of the first inductor; and the second end of the first inductor is connected to the first output end.

7. The charging management circuit according to claim 6, wherein: The controller is specifically configured to: control the first voltage control unit, the third bridge arm, and the fourth bridge arm to switch between the first mode and the second mode in response to the second DC signal input from the second input / output terminal; The first mode includes: the first switch is turned on, and the bridge arm switch between the first end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on; the second mode includes: the first switch is turned on, the bridge arm switch between the second end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on, and the bridge arm switch between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on.

8. The charging management circuit according to any one of claims 2 to 7, wherein: The DCDC conversion circuit further includes: a second voltage control unit, the second voltage control unit being connected to the first end of the third capacitor, the midpoint of the fifth bridge arm, the second output end of the DCDC conversion circuit, and the controller respectively; The controller is further configured to: in response to the second DC signal input from the second input / output end, control the second voltage control unit, the fifth bridge arm, and the sixth bridge arm to boost the second DC signal and output the boosted signal from the second output end.

9. The charging management circuit according to claim 8, wherein: The second voltage control unit includes: a second switch and a second inductor, the control electrode of the second switch is connected to the controller, the first electrode of the second switch is respectively connected to the first end of the third capacitor and the midpoint of the bridge arm of the fifth bridge arm, the second electrode of the second switch is connected to the first end of the second inductor; and the second end of the second inductor is connected to the second output end.

10. The charging management circuit according to claim 9, wherein: The controller is specifically configured to: control the second voltage control unit, the fifth bridge arm, and the sixth bridge arm to switch between the first mode and the second mode in response to the second DC signal input from the second input / output terminal; The first mode includes: the second switch is turned on, the bridge arm switch between the second end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on, and the bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on; the second mode includes: the second switch is turned on, and the bridge arm switch between the first end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on.

11. The charging management circuit according to claim 2, wherein: The controller is specifically configured to: control the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to switch between a first mode and a second mode; The first mode includes: a bridge arm switch between the first end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on, a bridge arm switch between the first end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, all bridge arm switches in the third bridge arm are turned on, a bridge arm switch between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, a bridge arm switch between the second end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on, a bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and a bridge arm switch between the second end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on; The second mode includes: the arm switch between the second end of the first bridge arm and the midpoint of the first bridge arm is turned on, the arm switch between the second end of the second bridge arm and the midpoint of the second bridge arm is turned on, the arm switch between the second end of the third bridge arm and the midpoint of the third bridge arm is turned on, the arm switch between the second end of the fourth bridge arm and the midpoint of the fourth bridge arm is turned on, all the arm switches in the fifth bridge arm are turned on, the arm switch between the second end of the sixth bridge arm and the midpoint of the sixth bridge arm is turned on, and the arm switch between the first end of the seventh bridge arm and the midpoint of the seventh bridge arm is turned on.

12. The charging management circuit according to claim 11, wherein: The voltage transmitted through the first input / output terminal is twice the voltage transmitted through the second input / output terminal.

13. The charging management circuit according to claim 2, wherein: The controller is specifically configured to: control the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to be in a first mode; The first mode includes: all bridge arm switches in the first bridge arm are turned on, the bridge arm switch located between the second end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, all bridge arm switches in the third bridge arm are turned on, the bridge arm switch located between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, all bridge arm switches in the fifth bridge arm are turned on, the bridge arm switch located between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and the bridge arm switch located between the second end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on.

14. The charging management circuit according to claim 13, wherein: The voltage transmitted through the first input / output terminal is the same as the voltage transmitted through the second input / output terminal.

15. A charging system, characterized in that: include: A charging device and at least one power receiving device, wherein the power receiving device comprises: a battery, and a charging management circuit according to any one of claims 1 to 14, wherein the battery is connected to the second input and output terminal of the DCDC conversion circuit in the charging management circuit; The charging device is used to: provide electrical energy to the charging management circuit; The charging management circuit is used to charge the battery using the electrical energy.

16. An electronic device, characterized in that: include: The charging management circuit and battery according to any one of claims 1 to 14, wherein the second input and output terminals of the DCDC conversion circuit of the charging management circuit are connected to the battery.

17. A charging method, characterized in that: include: The controller controls the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm in response to a first DC signal input from a first input / output terminal of the DCDC converter circuit, to convert the first DC signal and output the converted signal from the second input / output terminal of the DCDC converter circuit; or controls the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm in response to a second DC signal input from the second input / output terminal, to convert the converted signal from the first input / output terminal. Wherein, the first end of the first bridge arm is respectively connected to the first end of the first capacitor and the first end of the fifth bridge arm, the second end of the first bridge arm is respectively connected to the first end of the fourth capacitor and the first end of the third bridge arm, and the bridge arm midpoint of the first bridge arm is connected to the first input and output end of the DCDC conversion circuit; the first end of the second bridge arm is respectively connected to the first end of the second capacitor and the bridge arm midpoint of the third bridge arm, the second end of the second bridge arm is connected to the ground end, and the bridge arm midpoint of the second bridge arm is connected to the second end of the first capacitor; the first end of the third bridge arm is also connected to the first end of the fourth capacitor, the second end of the third bridge arm is respectively connected to the first end of the fourth bridge arm and the second input and output end of the DCDC conversion circuit, and the bridge arm midpoint of the third bridge arm is also connected to the first end of the second capacitor; the first end of the fourth bridge arm The end is also connected to the second input and output end, the second end of the fourth bridge arm is connected to the ground end, and the bridge arm midpoint of the fourth bridge arm is connected to the second end of the second capacitor; the first end of the fifth bridge arm is also connected to the first end of the first capacitor, the second end of the fifth bridge arm is respectively connected to the first end of the sixth bridge arm and the second input and output end, and the bridge arm midpoint of the fifth bridge arm is respectively connected to the first end of the third capacitor and the first end of the seventh bridge arm; the first end of the sixth bridge arm is also connected to the second input and output end, the second end of the sixth bridge arm is connected to the ground end, and the bridge arm midpoint of the sixth bridge arm is connected to the second end of the third capacitor; the first end of the seventh bridge arm is also connected to the first end of the third capacitor, the second end of the seventh bridge arm is connected to the ground end, and the bridge arm midpoint of the seventh bridge arm is connected to the second end of the fourth capacitor.

18. The charging method according to claim 17, wherein: In response to a first DC signal input from a first input / output terminal of a DCDC converter circuit, controlling the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to convert the first DC signal and output the converted signal from the second input / output terminal of the DCDC converter circuit; or, in response to a second DC signal input from the second input / output terminal, controlling the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to convert the converted signal and output the converted signal from the first input / output terminal, including: controlling the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to switch between a first mode and a second mode; The first mode includes: a state in which a bridge arm switch between the first end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on, a bridge arm switch between the first end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, a bridge arm switch between the first end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on, a bridge arm switch between the first end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, a bridge arm switch between the second end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on, a bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and a bridge arm switch between the second end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on; The second mode includes: a bridge arm switch located between the second end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on, a bridge arm switch located between the second end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, a bridge arm switch located between the second end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on, a bridge arm switch located between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, a bridge arm switch located between the first end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on, a bridge arm switch located between the first end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and a bridge arm switch located between the first end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on.

19. The charging method according to claim 17 or 18, wherein: Also includes: The controller controls the first voltage control unit, the third bridge arm, and the fourth bridge arm in response to the second DC signal input from the second input / output terminal to boost the second DC signal and output the boosted DC signal from the first output terminal of the DCDC conversion circuit; The DCDC conversion circuit includes the first voltage control unit, which is respectively connected to the first end of the second capacitor, the midpoint of the third bridge arm, the first output end, and the controller.

20. The charging method according to claim 19, wherein: In response to the second DC signal input from the second input / output terminal, controlling the first voltage control unit, the third bridge arm, and the fourth bridge arm to boost the second DC signal and output the boosted DC signal from the first output terminal of the DCDC converter circuit, including: in response to the second DC signal input from the second input / output terminal, controlling the first voltage control unit, the third bridge arm, and the fourth bridge arm to switch between the first mode and the second mode; The first voltage control unit includes: a first switch and a first inductor, the control electrode of the first switch is connected to the controller, the first electrode of the first switch is respectively connected to the first end of the second capacitor and the midpoint of the third bridge arm, and the second electrode of the first switch is connected to the first end of the first inductor; the second end of the first inductor is connected to the first output end; the first mode includes: the first switch is turned on and the bridge arm switch located between the first end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on; the second mode includes: the first switch is turned on, the bridge arm switch located between the second end of the third bridge arm and the bridge arm midpoint of the third bridge arm is turned on, and the bridge arm switch located between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on.

21. The charging method according to any one of claims 17 to 20, characterized in that: Also includes: The controller controls the second voltage control unit, the fifth bridge arm, and the sixth bridge arm in response to the second DC signal input from the second input / output terminal to boost the second DC signal and output the boosted DC signal from the second output terminal of the DCDC conversion circuit; The DCDC conversion circuit includes the second voltage control unit, which is respectively connected to the first end of the third capacitor, the midpoint of the fifth bridge arm, the second output end, and the controller.

22. The charging method according to claim 21, wherein: In response to the second DC signal input from the second input / output terminal, controlling the second voltage control unit, the fifth bridge arm, and the sixth bridge arm to boost the second DC signal and output it from the second output terminal of the DCDC converter circuit, including: in response to the second DC signal input from the second input / output terminal, controlling the second voltage control unit, the fifth bridge arm, and the sixth bridge arm to switch between the first mode and the second mode; The second voltage control unit includes: a second switch and a second inductor, the control electrode of the second switch is connected to the controller, the first electrode of the second switch is respectively connected to the first end of the third capacitor and the midpoint of the fifth bridge arm, the second electrode of the second switch is connected to the first end of the second inductor; the second end of the second inductor is connected to the second output end; the first mode includes: the second switch is turned on, the bridge arm switch located between the second end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on, and the bridge arm switch located between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on; the second mode includes: the second switch is turned on, and the bridge arm switch located between the first end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on.

23. The charging method according to claim 17, wherein: In response to a first DC signal input from a first input / output terminal of a DCDC converter circuit, controlling the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to convert the first DC signal and output the converted signal from the second input / output terminal of the DCDC converter circuit; or, in response to a second DC signal input from the second input / output terminal, controlling the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to convert the converted signal and output the converted signal from the first input / output terminal, including: controlling the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to switch between a first mode and a second mode; The first mode includes: a bridge arm switch between the first end of the first bridge arm and the bridge arm midpoint of the first bridge arm is turned on, a bridge arm switch between the first end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, all bridge arm switches in the third bridge arm are turned on, a bridge arm switch between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, a bridge arm switch between the second end of the fifth bridge arm and the bridge arm midpoint of the fifth bridge arm is turned on, a bridge arm switch between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and a bridge arm switch between the second end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on; The second mode includes: the arm switch between the second end of the first bridge arm and the midpoint of the first bridge arm is turned on, the arm switch between the second end of the second bridge arm and the midpoint of the second bridge arm is turned on, the arm switch between the second end of the third bridge arm and the midpoint of the third bridge arm is turned on, the arm switch between the second end of the fourth bridge arm and the midpoint of the fourth bridge arm is turned on, all the arm switches in the fifth bridge arm are turned on, the arm switch between the second end of the sixth bridge arm and the midpoint of the sixth bridge arm is turned on, and the arm switch between the first end of the seventh bridge arm and the midpoint of the seventh bridge arm is turned on.

24. The charging method according to claim 17, wherein: In response to a first DC signal input from a first input / output terminal of a DCDC converter circuit, controlling the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to convert the first DC signal and output the converted signal from the second input / output terminal of the DCDC converter circuit; or, in response to a second DC signal input from the second input / output terminal, controlling the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to convert the converted signal and output the converted signal from the first input / output terminal, including: controlling the first bridge arm, the second bridge arm, the third bridge arm, the fourth bridge arm, the fifth bridge arm, the sixth bridge arm, and the seventh bridge arm to be in a first mode; The first mode includes: all bridge arm switches in the first bridge arm are turned on, the bridge arm switch located between the second end of the second bridge arm and the bridge arm midpoint of the second bridge arm is turned on, all bridge arm switches in the third bridge arm are turned on, the bridge arm switch located between the second end of the fourth bridge arm and the bridge arm midpoint of the fourth bridge arm is turned on, all bridge arm switches in the fifth bridge arm are turned on, the bridge arm switch located between the second end of the sixth bridge arm and the bridge arm midpoint of the sixth bridge arm is turned on, and the bridge arm switch located between the second end of the seventh bridge arm and the bridge arm midpoint of the seventh bridge arm is turned on.

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