CN113725961A

CN113725961A - Multi-connector battery topology framework, control method thereof and electronic equipment

Info

Publication number: CN113725961A
Application number: CN202110943872.1A
Authority: CN
Inventors: 陈佳; 刘小勇
Original assignee: Meizu Technology Co Ltd
Current assignee: Meizu Technology Co Ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2021-11-30

Abstract

The present disclosure relates to a multi-connector battery topology architecture, a control method thereof, and an electronic device, including: a charging circuit and a single cell battery; the single cell battery includes a battery connector including at least a first battery connector and a second battery connector; the charging circuit comprises a Buck voltage reduction circuit module and a charge pump circuit module, wherein the input end of the Buck voltage reduction circuit module is externally connected with an alternating current-direct current adapter, the output end of the Buck voltage reduction circuit module is electrically connected with the input end of the charge pump circuit module, and the output end of the charge pump circuit module is electrically connected with a first battery connector and a second battery connector respectively; the Buck voltage reduction circuit module converts the charging voltage into a first target voltage value, the charge pump circuit module converts the first target voltage value into a second target voltage value and then respectively outputs the second target voltage value to the first battery connector and the second battery connector of the single-cell battery, and therefore the charging efficiency of the single-cell battery is improved.

Description

Multi-connector battery topology framework, control method thereof and electronic equipment

Technical Field

The disclosure relates to the technical field of battery charging, and in particular, to a multi-connector battery topology architecture, a control method thereof, and an electronic device.

Background

The rechargeable battery is a rechargeable battery with limited charging times and can be matched with a charger for use. Through charging the battery, the battery can be reused, and the requirements of economy and environmental protection can be favorably met. The charging process of a battery is the reverse of its discharging process, specifically, the process of converting electrical energy into chemical energy stored in the battery.

In current electronic devices, a single-cell battery is mainly used for charging. However, when a single-cell battery is fully charged, the voltage is about 4.5V, and when the charging current exceeds 8A, the heat generated by the circuit board of the battery end is serious. For this reason, the battery connector is also required to be replaced with a battery connector having a smaller impedance and a larger current, which leads to an increase in hardware cost; meanwhile, the wiring and heat dissipation treatment in the battery end circuit board are also more difficult. In order to meet the heat dissipation requirement, the charging power of the battery end of a common single cell is about 36W, which results in low charging efficiency.

Disclosure of Invention

In order to solve the technical problems or at least partially solve the technical problems, the present disclosure provides a multi-connector battery topology, a control method thereof, and an electronic device, which improve the charging efficiency of a single-cell battery.

In a first aspect, an embodiment of the present disclosure provides a multi-connector battery topology, including: a charging circuit and a single cell battery;

the single cell battery includes a battery connector including at least a first battery connector and a second battery connector;

the charging circuit comprises a Buck voltage reduction circuit module and a charge pump circuit module, wherein the input end of the Buck voltage reduction circuit module is externally connected with an alternating current-direct current adapter, the output end of the Buck voltage reduction circuit module is electrically connected with the input end of the charge pump circuit module, and the output end of the charge pump circuit module is respectively electrically connected with the first battery connector and the second battery connector;

the Buck voltage reduction circuit module converts a charging voltage into a first target voltage value, and the charge pump circuit module converts the first target voltage value into a second target voltage value and then respectively outputs the second target voltage value to the first battery connector and the second battery connector of the single-cell battery.

Optionally, the single-cell battery further includes a positive plate and a negative plate, the positive plate at least includes a first positive plate and a second positive plate, the first positive plate is electrically connected to the first battery connector through a first positive tab, and the second positive plate is electrically connected to the second battery connector through a second positive tab;

the first positive plate and the second positive plate are arranged in an insulated mode.

Optionally, the charging circuit further includes a control module, an input end of the control module is electrically connected to an output end of the Buck voltage-reducing circuit module, and an output end of the control module is electrically connected to a control end of the charge pump circuit module;

and the control module outputs a control signal to the charge pump circuit module according to the charging current output by the Buck voltage reduction circuit module.

Optionally, the charge pump circuit module at least includes a first charge pump circuit submodule, a second charge pump circuit submodule, and a third charge pump circuit submodule;

the input end of the first charge pump circuit submodule, the input end of the second charge pump circuit submodule and the input end of the third charge pump circuit submodule are respectively and electrically connected with the output end of the Buck voltage reduction circuit module; the output end of the first charge pump circuit submodule, the output end of the second charge pump circuit submodule and the output end of the third charge pump circuit submodule are respectively electrically connected with the first battery connector and the second battery connector, the control end of the first charge pump circuit submodule is electrically connected with the first output end of the control module, the control end of the second charge pump circuit submodule is electrically connected with the second output end of the control module, and the control end of the third charge pump circuit submodule is electrically connected with the third output end of the control module.

Optionally, the first charge pump circuit sub-module includes: the circuit comprises a first capacitor, a second capacitor, a third capacitor, a first transistor, a second transistor, a third transistor and a fourth transistor;

the input end of the first transistor and one end of the third capacitor are both connected with the output end of the Buck voltage reduction circuit module, the other end of the third capacitor is grounded, the output end of the first transistor and the input end of the second transistor are both connected with the first end of the first capacitor, the other end of the first capacitor is connected with the input end of the fourth transistor and the output end of the third transistor, the output end of the fourth transistor is grounded, the output end of the second transistor, the input end of the third transistor and one end of the second capacitor are all connected with the first battery connector and the second battery connector, and the other end of the second capacitor is grounded;

in a capacitor series connection stage, the first transistor and the third transistor are turned on, and the second transistor and the fourth transistor are turned off;

in the capacitor parallel connection stage, the second transistor and the fourth transistor are turned on, and the first transistor and the third transistor are turned off.

Optionally, the second charge pump circuit sub-module includes: a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor, a tenth transistor, and an eleventh transistor;

one end of the fourth capacitor and the input end of the fifth transistor are connected with the output end of the Buck voltage reduction circuit module, the other end of the fourth capacitor is grounded, the output end of the fifth transistor and the input end of the sixth transistor are connected with one end of the fifth capacitor, the other end of the fifth capacitor is connected with the output end of the seventh transistor and the input end of the eighth transistor, the input end of the seventh transistor and the input end of the eleventh transistor are grounded, the output end of the eleventh transistor and the input end of the tenth transistor are connected with one end of the sixth capacitor, the other end of the sixth capacitor is connected with the output end of the eighth transistor and the input end of the ninth transistor, the output end of the sixth transistor, the output end of the ninth transistor, the output end of the tenth transistor and one end of the seventh capacitor are connected with the first battery connector and the second battery connector The other end of the seventh capacitor is grounded;

in a capacitor series connection stage, the fifth transistor, the eighth transistor and the tenth transistor are turned on, and the sixth transistor, the seventh transistor, the ninth transistor and the eleventh transistor are turned off;

in the capacitor parallel connection stage, the sixth transistor, the seventh transistor, the ninth transistor, and the eleventh transistor are turned on, and the fifth transistor, the eighth transistor, and the tenth transistor are turned off.

Optionally, the third charge pump circuit sub-module includes: an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth transistor, a thirteenth transistor, a fourteenth transistor, a fifteenth transistor, a sixteenth transistor, a seventeenth transistor, an eighteenth transistor, a nineteenth transistor, a twentieth transistor, and a twenty-first transistor;

one end of the eighth capacitor and the input end of the twelfth transistor are both connected to the output end of the Buck circuit module, the other end of the eighth capacitor is grounded, the output end of the twelfth transistor and the input end of the thirteenth transistor are both connected to one end of the ninth capacitor, the other end of the ninth capacitor is connected to the input end of the fourteenth transistor and the input end of the fifteenth transistor, the output end of the fourteenth transistor is grounded, the output end of the fifteenth transistor and the input end of the sixteenth transistor are both connected to one end of the tenth capacitor, the other end of the tenth capacitor is connected to the input end of the seventeenth transistor and the input end of the eighteenth transistor, the output end of the seventeenth transistor is grounded, and the output end of the eighteenth transistor and the input end of the nineteenth transistor are connected to one end of the eleventh capacitor, the other end of the eleventh capacitor is connected with the input end of the twentieth transistor and the input end of the twenty-first transistor, the output end of the twentieth transistor is grounded, the output end of the twelfth transistor, the output end of the sixteenth transistor, the output end of the nineteenth transistor, the output end of the twenty-first transistor and one end of the eleventh capacitor are all connected with the first battery connector and the second battery connector, and the other end of the eleventh capacitor is grounded;

in a capacitor series connection stage, the twelfth transistor, the fifteenth transistor, the eighteenth transistor and the twenty-first transistor are turned on, and the thirteenth transistor, the fourteenth transistor, the sixteenth transistor, the nineteenth transistor and the twentieth transistor are turned off;

in the capacitor parallel connection stage, the thirteenth transistor, the fourteenth transistor, the sixteenth transistor, the nineteenth transistor, and the twentieth transistor are turned on, and the twelfth transistor, the fifteenth transistor, the eighteenth transistor, and the twenty-first transistor are turned off.

Optionally, the Buck voltage reduction circuit module includes: the circuit comprises a controller, a thirteenth capacitor, a fourteenth capacitor, a first inductor, a twenty-second transistor, a twenty-third transistor, a twenty-fourth transistor and a twenty-fifth transistor;

an alternating current-direct current adapter is externally connected to an input end of the twenty-second transistor, an output end of the twenty-second transistor and an input end of the twenty-third transistor are both connected to one end of the thirteenth capacitor, the other end of the thirteenth capacitor is connected to an output end of the twenty-fourth transistor and an input end of the twenty-fifth transistor, an output end of the twenty-fifth transistor is grounded, one end of the first inductor is connected to an output end of the twenty-third transistor and an input end of the twenty-fourth transistor, the other end of the first inductor is respectively connected to one end of the fourteenth capacitor and the input end of the charge pump circuit module, and the other end of the fourteenth capacitor is grounded.

In a second aspect, an embodiment of the present disclosure provides a multi-connector battery control method, including:

the control module collects the charging current output by the Buck voltage reduction circuit module in real time and determines the conduction state of the charge pump circuit module based on the charging current.

In a third aspect, an embodiment of the present disclosure provides an electronic device, where the electronic device includes the topology structure described in any one of the first aspects, or performs charging by using the control method described in the second aspect.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

according to the multi-connector battery topology framework, the control method and the electronic device, the single-cell battery at least comprises the first battery connector and the second battery connector, when the battery is charged, the first battery connector and the second battery connector are used for shunting, so that the current flowing through the battery connectors is reduced, the power loss of the battery connectors is reduced, and the charging efficiency of the battery is improved. The Buck voltage reduction circuit module is used as a primary voltage reduction circuit, the smaller the heat loss on the charging circuit is reduced, the charging performance and the safety performance of the charging circuit are improved, and the charge pump circuit module is used as a secondary voltage reduction circuit, so that the current value output to the single-cell battery through the charge pump circuit module is larger, and the charging efficiency of the single-cell battery is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a multi-connector battery topology according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of another multi-connector battery topology provided by an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of yet another multi-connector battery topology provided by an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of yet another multi-connector battery topology provided by an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a first charge pump circuit sub-module provided in the embodiment of the present disclosure;

FIG. 6 is a schematic diagram of another first charge pump circuit sub-module according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a sub-module of a further first charge pump circuit provided in the embodiments of the present disclosure;

FIG. 8 is a block diagram of a second charge pump circuit sub-module according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of another second charge pump circuit sub-module according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a second charge pump circuit sub-module provided in the embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a third charge pump circuit sub-module provided in the embodiment of the disclosure;

FIG. 12 is a block diagram of another third charge pump circuit sub-module provided by embodiments of the present disclosure;

FIG. 13 is a schematic diagram of a third exemplary sub-module of a charge pump circuit provided in accordance with an embodiment of the present disclosure;

fig. 14 is a schematic structural diagram of a Buck circuit module according to an embodiment of the present disclosure.

Wherein: 10. a charging circuit; 20. a single cell battery; 30. an AC/DC adapter; 110. a Buck voltage reduction circuit module; 120. a charge pump circuit module; 21. a battery connector; 23. a positive plate; 211. a first battery connector; 212. a second battery connector; 213. a third battery connector; 221. a first positive tab; 222. a second positive tab; 223. a third positive tab; 231. a first positive plate; 232. a second positive plate; 233. a third positive plate; 130. a control module; 121. a first charge pump circuit sub-module; 122. a second charge pump circuit sub-module; 123. a third charge pump circuit sub-module; c1, a first capacitance; c2, a second capacitor; c3, a third capacitance;

c4, a fourth capacitance; c5, a fifth capacitance; c6, a sixth capacitor; c7, a seventh capacitance; c8, an eighth capacitor; c9, ninth capacitance; c10, tenth capacitance; c11, an eleventh capacitor; c12, twelfth capacitor; c13, a thirteenth capacitor; c14, fourteenth capacitance; q1, a first transistor;

q2, a second transistor; q3, a third transistor; q4, a fourth transistor; q5, a fifth transistor; q6, a sixth transistor; q7, a seventh transistor; q8, an eighth transistor; q9, ninth transistor; q10, tenth transistor; q11, an eleventh transistor; q12, a twelfth transistor; q13, thirteenth transistor; q14, fourteenth transistor; q15, a fifteenth transistor; q16, sixteenth transistor; q17, seventeenth transistor; q18, eighteenth transistor; q19, nineteenth transistor; q20, twentieth transistor; q21, twenty-first transistor; q22, a twentieth transistor; q23, a twenty-third transistor; q24, a twenty-fourth transistor; q25, a twenty-fifth transistor; 140. and a controller.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

Fig. 1 is a schematic structural diagram of a multi-connector battery topology according to an embodiment of the present disclosure, as shown in fig. 1, the multi-connector battery topology includes a charging circuit 10 and a single cell battery 20, the single cell battery 20 includes a battery connector 21, and the battery connector 21 includes at least a first battery connector 211 and a second battery connector 212; the charging circuit 10 comprises a Buck circuit module 110 and a charge pump circuit module 120, wherein the input end of the Buck circuit module 110 is externally connected with the alternating current-direct current adapter 30, the output end of the Buck circuit module 110 is electrically connected with the input end of the charge pump circuit module 120, and the output end of the charge pump circuit module 120 is respectively electrically connected with a first battery connector 211 and a second battery connector 212; the Buck voltage circuit module 110 converts the charging voltage into a first target voltage value, and the charge pump circuit module 120 converts the first target voltage value into a second target voltage value and then outputs the second target voltage value to the first battery connector 211 and the second battery connector 212 of the single cell battery 20, respectively.

As shown in fig. 1, the single cell battery 20 includes a first battery connector 211 and a second battery connector 212, the first battery connector 211 is electrically connected to a first positive tab 231 in the cell through a first positive tab 221, the second battery connector 212 is electrically connected to a second positive tab 232 in the cell through a second positive tab 222, the battery connector of the single cell battery 20 includes at least the first battery connector 211 and the second battery connector 212, when the charging current of the single cell battery 20 is 10A, the current through the first battery connector 211 and the second battery connector 212 is shunted, that is, the current through the first battery connector 211 and the current through the second battery connector 212 are respectively 5A, the current flowing through the battery connectors is reduced, the power loss of the battery connectors is reduced, and the charging efficiency of the single cell battery 20 is improved.

It should be noted that fig. 1 exemplarily shows that the battery connector 21 includes a first battery electrical connector 211 and a second battery connector 212, and in other embodiments, the battery connector 21 may further include a first battery connector 211, a second battery connector 212, and a third battery connector 213, as shown in fig. 2. When the single cell battery 20 comprises three battery electric connectors, at this time, the single cell battery 20 is arranged to comprise the positive plate 23 and the negative plate, the positive plate and the negative plate are arranged in an insulated manner, the positive plate 23 comprises the first positive plate 231, the second positive plate 232 and the third positive plate 233, at this time, the first battery connector 211 is electrically connected with the first positive plate 231 through the first positive tab 221, the second battery connector 212 is electrically connected with the second positive plate 232 through the second positive tab 222, and the third battery connector 213 is electrically connected with the third positive plate 233 through the third positive tab 223. In addition, fig. 1 exemplarily shows that the single-cell battery includes two battery connectors and two positive plates, one positive plate is electrically connected with one battery connector through one positive tab, fig. 2 exemplarily shows that the single-cell battery includes three battery connectors and three positive plates, and one positive plate is electrically connected with one battery connector through one positive tab.

By arranging the charging circuit to comprise the Buck voltage reducing circuit module 110 and the charge pump circuit module 120, the input end of the Buck voltage reducing circuit module 110 can directly receive high-voltage output by the alternating current-direct current adapter 30, for example, 20V and 30V correspond to the same input power, the higher the voltage value input by the Buck voltage reducing circuit module 110 is, the smaller the corresponding input current is, the smaller the heat loss on the corresponding charging circuit at the moment is, the charging performance and the safety performance of the charging circuit are improved, and the problem of charging heating of the charging circuit during high-power charging can be better solved. The charge pump circuit module 120 is used as a secondary voltage reduction module, so that the current value output to the single-cell battery 20 through the charge pump circuit module 120 is large, and the charging efficiency of the single-cell battery is improved. For example, the charge pump circuit module 120 may be an 1/2-time buck charge pump, an 1/3-time buck charge pump, or an 1/4-time buck charge pump, when the charge pump circuit module 120 is the 1/2-time buck charge pump, the input voltage of the charge pump circuit module 120 is 2 times the output voltage, and the input current is half of the output current, when the charge pump circuit module 120 is the 1/3-time buck charge pump, the input voltage of the charge pump circuit module 120 is 3 times the output voltage, and the input current is 1/3 times the output current, and when the charge pump circuit module 120 is the 1/4-time buck charge pump, the input voltage of the charge pump circuit module 120 is 4 times the output voltage, and the input current is 1/4 times the output current.

The multi-connector battery topology framework provided by the embodiment of the disclosure at least comprises the first battery connector and the second battery connector by arranging the single-cell battery, and when the battery is charged, the current flowing through the battery connector is reduced by shunting the first battery connector and the second battery connector, so that the power loss of the battery connector is reduced, and the charging efficiency of the battery is improved. The Buck voltage reduction circuit module is used as a primary voltage reduction circuit, the smaller the heat loss on the charging circuit is reduced, the charging performance and the safety performance of the charging circuit are improved, and the charge pump circuit module is used as a secondary voltage reduction circuit, so that the current value output to the single-cell battery through the charge pump circuit module is larger, and the charging efficiency of the single-cell battery is improved.

Fig. 3 is a schematic structural diagram of another multi-connector battery topology according to an embodiment of the present disclosure, in this embodiment, on the basis of the foregoing embodiment, as shown in fig. 3, the charging circuit further includes a control module 130, an input end of the control module 130 is electrically connected to an output end of the Buck voltage-reducing circuit module 110, and an output end of the control module 130 is electrically connected to a control end of the charge pump circuit module 120; the control module 130 outputs a control signal to the charge pump circuit module 120 according to the charging current output by the Buck voltage-reducing circuit module 110.

For example, as shown in fig. 3, the charging circuit 10 further includes a control module 130, where the control module 130 outputs a control signal to the charge pump circuit module 120 according to the acquired charging current output by the Buck voltage-reducing circuit module 110, and controls the charge pump circuit module 120 to be turned on, so as to implement that the charging circuit charges the single-cell battery 20.

Fig. 4 is a schematic structural diagram of another multi-connector battery topology provided in the embodiment of the present disclosure, and in this embodiment, on the basis of the foregoing embodiment, as shown in fig. 4, the charge pump circuit module 120 at least includes a first charge pump circuit submodule 121, a second charge pump circuit submodule 122, and a third charge pump circuit submodule 123; the input end of the first charge pump circuit sub-module 121, the input end of the second charge pump circuit sub-module 122 and the input end of the third charge pump circuit sub-module 123 are respectively electrically connected with the output end of the Buck voltage reduction circuit module 110; the output end of the first charge pump circuit submodule 121, the output end of the second charge pump circuit submodule 122 and the output end of the third charge pump circuit submodule 123 are electrically connected with the first battery connector 211 and the second battery connector 212 respectively, the control end of the first charge pump circuit submodule 121 is electrically connected with the first output end of the control module 130, the control end of the second charge pump circuit submodule 122 is electrically connected with the second output end of the control module 130, and the control end of the third charge pump circuit submodule 122 is electrically connected with the third output end of the control module 130.

By arranging the charge pump circuit module 120 to include the first charge pump circuit submodule 121, the second charge pump circuit submodule 122 and the third charge pump circuit submodule 123 which are arranged in parallel, when the single-cell battery 20 is in a charging stage, the control module 130 controls to open the first charge pump circuit submodule 121, the second charge pump circuit submodule 122 or the third charge pump circuit submodule 123 according to the acquired charging current output by the Buck voltage reduction circuit module 110.

Illustratively, when the single-cell battery 20 includes two battery connectors 21, and the charging current output by the Buck voltage-reducing circuit module 110 to the charge pump circuit module 120 is 5A, the control module 130 controls to turn on the first charge pump circuit submodule 121 at this time, so that the charging current output by the first charge pump circuit submodule 121 to the single-cell battery 20 is 10A, that is, the first battery connector and the second battery connector respectively output 5A currents. When the single-cell battery 20 includes three battery connectors, and the charging current output by the Buck voltage-reducing circuit module 110 to the charge pump circuit module 120 is 5A, the control module 130 controls to turn on the second charge pump circuit submodule 122 at this time, so that the charging current output by the second charge pump circuit submodule 122 to the single-cell battery 20 is 15A, that is, the first battery connector, the second battery connector and the third battery connector respectively divide the current into 5A. When the single cell battery 20 includes four battery connectors, and the charging current output from the Buck voltage-reducing circuit module 110 to the charge pump circuit module 120 is 5A, the control module 130 controls to turn on the third charge pump circuit submodule 123 at this time, so that the charging current output from the third charge pump circuit submodule 123 to the single cell battery 20 is 20A, that is, the first battery connector, the second battery connector, the third battery connector, and the fourth battery connector respectively divide the current into 5A currents. The control module 130 controls the first charge pump circuit submodule 121 to be opened, or controls the second charge pump circuit submodule 122 to be opened, or controls the third charge pump circuit submodule 123 to be opened according to the charging current output control signal output to the charge pump circuit module 120 by the Buck voltage reduction circuit module 110, so that the current output to each battery connector by the charge pump circuit module 120 is 4-5A, the heat generation of the battery connectors is reduced, and the charging efficiency of the single-cell battery is improved.

Fig. 5 is a schematic structural diagram of a first charge pump circuit sub-module provided in the embodiment of the present disclosure, and as shown in fig. 5, the first charge pump circuit sub-module includes: a first capacitor C1, a second capacitor C2, a third capacitor C3, a first transistor Q1, a second transistor Q2, a third transistor Q3, and a fourth transistor Q4;

the input end of the first transistor Q1 and one end of the third capacitor C3 are both connected to the output end of the Buck voltage-reducing circuit module 110, the other end of the third capacitor C3 is grounded, the output end of the first transistor Q1 and the input end of the second transistor Q2 are both connected to the first end of the first capacitor C1, the other end of the first capacitor C1 is connected to the input end of the fourth transistor Q4 and the output end of the third transistor Q3, the output end of the fourth transistor Q3 is grounded, the output end of the second transistor Q2, the input end of the third transistor Q3 and one end of the second capacitor C2 are all connected to the first battery connector 211 and the second battery connector 212, and the other end of the second capacitor C2 is grounded.

In the capacitor series connection stage, the first transistor Q1 and the third transistor Q3 are turned on, and the second transistor Q2 and the fourth transistor Q4 are turned off; in the capacitor parallel stage, the second transistor Q2 and the fourth transistor Q4 are turned on, and the first transistor Q1 and the third transistor Q3 are turned off.

As shown in fig. 5, the first charge pump circuit submodule 121 implements voltage reduction by switching between the first capacitor C1 and the second capacitor C2, and since there is no inductive device in the first charge pump circuit submodule 121, there is no inductive energy loss in the first charge pump circuit submodule 121, so that the charging efficiency of the charging circuit 10 is higher, the noise is lower, and the electromagnetic interference is smaller.

As shown in fig. 5, the first charge pump circuit sub-module 121 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a first transistor Q1, a second transistor Q2, a third transistor Q3, and a fourth transistor Q4, and by controlling on and off of the first transistor Q1, the second transistor Q2, the third transistor Q3, and the fourth transistor Q4, the first capacitor C1 and the second capacitor C2 are connected in series and in parallel, so that the input voltage of the first charge pump circuit sub-module 121 is 2 times of the output voltage, and the input current is half of the output current. Specifically, as shown in fig. 6, the input voltage of the first charge pump circuit sub-module 121 is VIN, the input current is I, when the first transistor Q1 and the third transistor Q3 are turned on, the second transistor Q2 and the fourth transistor Q4 are turned off, the first capacitor C1 and the second capacitor C2 are connected in series, the voltage of the first capacitor C1 is approximately equal to VIN/2, and the voltage of the second capacitor C2 is approximately equal to VIN/2, at this time, the charging voltage output by the first charge pump circuit sub-module 121 to the first battery connector 211 and the second battery connector 212 is VIN/2. As shown in fig. 7, when the second transistor Q2 and the fourth transistor Q4 are turned on, the first transistor Q1 and the third transistor Q3 are turned off, and the first capacitor C1 and the second capacitor C2 are connected in parallel, at this time, the charging current output by the charge pump circuit sub-module 121 to the first battery connector 211 and the second battery connector 212 is 2I, so that the input voltage of the first charge pump circuit sub-module 121 is 2 times of the output voltage, and the input current is half of the output current.

Fig. 8 is a schematic structural diagram of a second charge pump circuit sub-module provided in the embodiment of the disclosure, and as shown in fig. 8, the second charge pump circuit sub-module 122 includes: a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7, an eighth transistor Q8, a ninth transistor Q9, a tenth transistor Q10, and an eleventh transistor Q11; one end of a fourth capacitor C4 and an input end of a fifth transistor Q5 are both connected to the output end of the Buck voltage-reducing circuit module 110, the other end of the fourth capacitor C4 is grounded, the output end of the fifth transistor Q5 and the input end of a sixth transistor Q6 are both connected to one end of a fifth capacitor C5, the other end of the fifth capacitor C5 is connected to the output end of a seventh transistor Q7 and the input end of an eighth transistor Q8, the input end of a seventh transistor Q7 and the input end of an eleventh transistor Q11 are both grounded, the output end of an eleventh transistor Q11 and the input end of a tenth transistor Q10 are both connected to one end of a sixth capacitor C6, the other end of the sixth capacitor C6 is connected to the output end of the eighth transistor Q8 and the input end of a ninth transistor Q9, the output end of the sixth transistor Q6, the output end of a ninth transistor Q9, the output end of a tenth transistor Q10 and one end of a seventh capacitor C7 are both connected to the first battery connector 211 and the second battery connector 212, the other terminal of the seventh capacitor C7 is connected to ground.

In the capacitor series connection stage, the fifth transistor Q5, the eighth transistor Q8 and the tenth transistor Q10 are turned on, and the sixth transistor Q6, the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 are turned off; in the capacitor parallel stage, the sixth transistor Q6, the seventh transistor Q7, the ninth transistor Q9, and the eleventh transistor Q11 are turned on, and the fifth transistor Q5, the eighth transistor Q8, and the tenth transistor Q10 are turned off.

Fig. 8 exemplarily shows a structural diagram of a second charge pump circuit sub-module, wherein the second charge pump circuit sub-module is composed of a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7, an eighth transistor Q8, a ninth transistor Q9, a tenth transistor Q10 and an eleventh transistor Q11, and by controlling on and off of the fifth transistor Q5, the sixth transistor Q6, the seventh transistor Q7, the eighth transistor Q8, the ninth transistor Q9, the tenth transistor Q10 and the eleventh transistor Q11, series and parallel connection of the fifth capacitor C5, the sixth capacitor C6 and the seventh capacitor C7 is realized, so that an input voltage of the second charge pump circuit sub-module 122 is 3 times an output voltage, and an input current is 1/3 times an output current. Specifically, as shown in fig. 9, the input voltage of the second charge pump circuit sub-module 122 is VIN, the input current is I, when the fifth transistor Q5, the eighth transistor Q8 and the tenth transistor Q10 are turned on, and the sixth transistor Q6, the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 are turned off, the fifth capacitor C5, the sixth capacitor C6 and the seventh capacitor C7 are connected in series, and at this time, the charging voltage output by the second charge pump circuit sub-module 122 to the first battery connector 211 and the second battery connector 212 is VIN/3. As shown in fig. 10, when the sixth transistor Q6, the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 are turned on and the fifth transistor Q5, the eighth transistor Q8 and the tenth transistor Q10 are turned off, the fifth capacitor C5, the sixth capacitor C6 and the seventh capacitor C7 are connected in parallel, at this time, the charging current output by the second charge pump circuit sub-module 122 to the first battery connector 211 and the second battery connector 212 is 3I, and the second charge pump circuit sub-module 122 has an input voltage 3 times the output voltage and an input current 1/3 times the output current.

Fig. 11 is a schematic structural diagram of a third charge pump circuit sub-module provided in the embodiment of the disclosure, and as shown in fig. 11, the third charge pump circuit sub-module 123 includes: an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a twelfth transistor Q12, a thirteenth transistor Q13, a fourteenth transistor Q14, a fifteenth transistor Q15, a sixteenth transistor Q16, a seventeenth transistor Q17, an eighteenth transistor Q18, a nineteenth transistor Q19, a twentieth transistor Q20, and a twenty-first transistor Q21;

one end of an eighth capacitor C8 and an input end of a twelfth transistor Q12 are both connected to the output end of the Buck voltage-reducing circuit module 110, the other end of the eighth capacitor C8 is grounded, the output end of a twelfth transistor Q12 and the input end of a thirteenth transistor Q13 are both connected to one end of a ninth capacitor C9, the other end of a ninth capacitor C9 is connected to the input end of a fourteenth transistor Q14 and the input end of a fifteenth transistor Q15, the output end of a fourteenth transistor Q14 is grounded, the output end of a fifteenth transistor Q15 and the input end of a sixteenth transistor Q16 are both connected to one end of a tenth capacitor C10, the other end of a tenth capacitor C10 is connected to the input end of a seventeenth transistor Q17 and the input end of an eighteenth transistor Q18, the output end of a seventeenth transistor Q17 is grounded, the output end of an eighteenth transistor Q18 and the input end of a nineteenth transistor Q19 are connected to one end of an eleventh capacitor C11, and the other end of an eleventh capacitor C11 is connected to the input end of a twentieth transistor Q20 and an input end of a twenty-first transistor Q21 The output end of the twentieth transistor Q20 is grounded, the output end of the twelfth transistor Q12, the output end of the sixteenth transistor Q16, the output end of the nineteenth transistor Q19, the output end of the twenty-first transistor Q21 and one end of the eleventh capacitor C11 are all connected with the first battery connector 121 and the second battery connector 122, and the other end of the eleventh capacitor C11 is grounded.

In the capacitor series connection stage, the twelfth transistor Q12, the fifteenth transistor Q15, the eighteenth transistor Q18 and the twenty-first transistor Q21 are turned on, and the thirteenth transistor Q13, the fourteenth transistor Q14, the sixteenth transistor Q16, the nineteenth transistor Q19 and the twentieth transistor Q20 are turned off; in the capacitor parallel connection stage, the thirteenth transistor Q13, the fourteenth transistor Q14, the sixteenth transistor Q16, the nineteenth transistor Q19 and the twentieth transistor Q20 are turned on, and the twelfth transistor Q12, the fifteenth transistor Q15, the eighteenth transistor Q18 and the twenty-first transistor Q21 are turned off.

Fig. 11 exemplarily shows a structural schematic diagram of a third charge pump circuit sub-module, wherein the third charge pump circuit sub-module 123 is composed of an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a twelfth transistor Q12, a thirteenth transistor Q13, a fourteenth transistor Q14, a fifteenth transistor Q15, a sixteenth transistor Q16, a seventeenth transistor Q17, an eighteenth transistor Q18, a nineteenth transistor Q19, a twentieth transistor Q20, and a twenty-first transistor Q21, and the ninth capacitor C9, the nineteenth transistor Q19, the twentieth transistor Q20, and the twenty-first transistor Q21 are turned on and off by controlling the twelfth transistor Q12, the thirteenth transistor Q13, the fourteenth transistor Q14, the fifteenth transistor Q15, the sixteenth transistor Q16, the seventeenth transistor Q17, the eighteenth transistor Q18, the nineteenth transistor Q19, the twentieth transistor Q20, and the twenty-first transistor Q21 to realize the nineteenth capacitor C467, the nineteenth capacitor C10, The eleventh capacitor C11 and the twelfth capacitor C12 are connected in series and in parallel, so that the third charge pump circuit sub-module 123 has an input voltage 4 times the output voltage and an input current 1/4 times the output current. Specifically, as shown in fig. 12, the input voltage of the third charge pump circuit sub-module 123 is VIN, the input current is I, when the twelfth transistor Q12, the fifteenth transistor Q15, the eighteenth transistor Q18 and the twenty-first transistor Q21 are turned on, and the thirteenth transistor Q13, the fourteenth transistor Q14, the sixteenth transistor Q16, the nineteenth transistor Q19 and the twentieth transistor Q20 are turned off, the ninth capacitor C9, the tenth capacitor C10, the eleventh capacitor C11 and the twelfth capacitor C12 are connected in series, and at this time, the charging voltage output by the third charge pump circuit sub-module 123 to the first battery connector 211 and the second battery connector 212 is VIN/4. As shown in fig. 13, when the thirteenth transistor Q13, the fourteenth transistor Q14, the sixteenth transistor Q16, the nineteenth transistor Q19 and the twentieth transistor Q20 are turned on and the twelfth transistor Q12, the fifteenth transistor Q15, the eighteenth transistor Q18 and the twenty-first transistor Q21 are turned off, the ninth capacitor C9, the tenth capacitor C10, the eleventh capacitor C11 and the twelfth capacitor C12 are connected in parallel, at this time, the charging current output by the third charge pump circuit submodule 123 to the first battery connector 211 and the second battery connector 212 is 4I, and it is achieved that the input voltage of the third charge pump circuit submodule 123 is 4 times the output voltage and the input current is 1/4 times the output current.

Fig. 14 is a schematic structural diagram of a Buck circuit module according to an embodiment of the present disclosure, and as shown in fig. 14, the Buck circuit module includes: the controller 140, a thirteenth capacitor C13, a fourteenth capacitor C14, a first inductor L1, a twenty-second transistor Q22, a twenty-third transistor Q23, a twenty-fourth transistor Q24, and a twenty-fifth transistor Q25; the input end of the twentieth transistor Q22 is externally connected with the ac/dc adapter 30, the output end of the twentieth transistor Q22 and the input end of the twenty-third transistor Q23 are both connected with one end of a thirteenth capacitor C13, the other end of the thirteenth capacitor C13 is connected with the output end of a twenty-fourth transistor Q24 and the input end of a twenty-fifth transistor Q25, the output end of the twenty-fifth transistor Q25 is grounded, one end of a first inductor L1 is connected with the output end of a twenty-third transistor Q23 and the input end of the twenty-fourth transistor Q24, the other end of the first inductor L1 is respectively connected with one end of a fourteenth capacitor C14 and the input end of the charge pump circuit module 120, and the other end of the fourteenth capacitor C14 is grounded.

The conventional Buck voltage reduction circuit module has conduction loss and switching loss, and the inductor has coil loss and magnetic core loss, so that the working efficiency of the whole Buck voltage reduction circuit is not high. The flying capacitor, namely the thirteenth capacitor C13, is added into the Buck voltage reduction circuit module provided by the embodiment of the disclosure, so that the traditional Buck voltage reduction circuit module is optimized, and the charging efficiency of the charging circuit is improved.

Specifically, the output voltage of the thirteenth capacitor C13 has three states: 0, VIN/2, VIN. When the input voltage is higher than twice the output voltage, the switching node alternates between 0 and VIN/2. When the input voltage is less than twice the output voltage, the switching node alternates between VIN and VIN/2, specifically, the switching node is SW and the switching node voltage is VSW.

Specifically, when VIN > 2VOUT, the first stage: the twentieth transistor Q22 and the twenty-fourth transistor Q24 are turned on, the twenty-third transistor Q23 and the twenty-fifth transistor Q25 are turned off, the switching node voltage VSW-VFLY-VIN/2 starts to be charged, the thirteenth capacitor C13 starts to be charged, and the first inductor L1 starts to be energized. And a second stage: the twenty-fourth transistor Q24 and the twenty-fifth transistor Q25 are turned on, the twenty-second transistor Q22 and the twenty-third transistor Q23 are turned off, the switching node is grounded, the switching node voltage VSW is 0, and the first inductor L1 stops the energization. And a third stage: the twenty-third transistor Q23 and the twenty-fifth transistor Q25 are turned on, the twenty-second transistor Q22 and the twenty-fourth transistor Q24 are turned off, the switch node voltage VSW is VIN/2, the thirteenth capacitor C13 starts discharging, and the first inductor L1 is energized. A fourth stage: the twenty-fourth transistor Q24 and the twenty-fifth transistor Q25 are turned on, the twenty-second transistor Q22 and the twenty-third transistor Q23 are turned off, the switch node voltage is grounded, the VSW voltage is 0, and the first inductor L1 stops being energized.

When VIN < 2VOUT, the duty cycle is continuously increased by the controller 140 as the input voltage continues to decrease until the twenty-second transistor Q22 and the twenty-third transistor Q23 are turned on at the same time interval. In this case, the switching node voltage VSW begins to alternate between VIN and VIN/2. The first stage is as follows: the twentieth transistor Q22 and the twenty-third transistor Q23 are turned on, the twenty-fourth transistor Q24 and the twenty-fifth transistor Q25 are turned off, the switching node voltage VSW is VIN, and the first inductor L1 is energized. And a second stage: the twenty-second transistor Q22 and the twenty-fourth transistor Q24 are turned on, the twenty-third transistor Q23 and the twenty-fifth transistor Q25 are turned off, and the switching node voltage VSW-VFLY-VIN/2, where VFLY is the voltage of the thirteenth capacitor C13, the thirteenth capacitor C13 starts to charge, and the first inductor L1 is turned on. And a third stage: the twentieth transistor Q22 and the twenty-third transistor Q23 are turned on, the twenty-fourth transistor Q24 and the twenty-fifth transistor Q25 are turned off, the switching node voltage VSW is VIN, and the first inductor L1 is energized. A fourth stage: the twentieth transistor Q22 and the twenty-fourth transistor Q24 are turned off, the twenty-third transistor Q23 and the twenty-fifth transistor Q25 are turned on, the switching node voltage VSW is VIN/2, the thirteenth capacitor C13 discharges, and the first inductor L1 is energized.

The Buck voltage reduction circuit module is a 3-level Buck circuit, so that the voltage of an inductor and a switching transistor is reduced, the switching frequency at a switching node in the 3-level Buck circuit is doubled, the current ripple of the first inductor can be reduced to one fourth of a common voltage reduction converter, a smaller and thinner inductor can be used after the current ripple of the first inductor is reduced, and the coil resistance is reduced, so that the power loss of the charging circuit is reduced.

Optionally, the present disclosure also provides a multi-connector battery control method, including: the control module collects the charging current output by the Buck voltage reduction circuit module in real time and determines the conduction state of the charge pump circuit module based on the charging current.

Specifically, the charge pump circuit module comprises a first charge pump circuit submodule, a second charge pump circuit submodule and a third charge pump circuit submodule which are arranged in parallel, and when the single-cell battery is in a charging stage, the control module controls to open the first charge pump circuit submodule, the second charge pump circuit submodule or the third charge pump circuit submodule according to the acquired charging current output by the Buck voltage reduction circuit module.

Optionally, an embodiment of the present disclosure further provides an electronic device, where the electronic device includes the topology described in any embodiment, or performs charging by using the control method described in any embodiment, and the electronic device has the beneficial effects in any embodiment.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-connector battery topology architecture, comprising: a charging circuit and a single cell battery;

2. The topological architecture of claim 1, wherein said single cell battery further comprises a positive tab and a negative tab, said positive tab comprising at least a first positive tab and a second positive tab, said first positive tab being electrically connected to said first battery connector via a first positive tab, said second positive tab being electrically connected to said second battery connector via a second positive tab;

3. The topology of claim 1, wherein the charging circuit further comprises a control module, an input terminal of the control module is electrically connected to an output terminal of the Buck voltage circuit module, and an output terminal of the control module is electrically connected to a control terminal of the charge pump circuit module;

4. The topological architecture of claim 3, wherein said charge pump circuit modules comprise at least a first charge pump circuit sub-module, a second charge pump circuit sub-module, and a third charge pump circuit sub-module;

5. The topological architecture of claim 4, wherein the first charge pump circuit sub-module comprises: the circuit comprises a first capacitor, a second capacitor, a third capacitor, a first transistor, a second transistor, a third transistor and a fourth transistor;

6. The topological architecture of claim 4, wherein the second charge pump circuit sub-module comprises: a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor, a tenth transistor, and an eleventh transistor;

7. The topological architecture of claim 4, wherein the third charge pump circuit sub-module comprises: an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth transistor, a thirteenth transistor, a fourteenth transistor, a fifteenth transistor, a sixteenth transistor, a seventeenth transistor, an eighteenth transistor, a nineteenth transistor, a twentieth transistor, and a twenty-first transistor;

8. The topology of claim 1, wherein the Buck voltage circuit module comprises: the circuit comprises a controller, a thirteenth capacitor, a fourteenth capacitor, a first inductor, a twenty-second transistor, a twenty-third transistor, a twenty-fourth transistor and a twenty-fifth transistor;

9. A method of controlling a multi-connector battery, comprising:

10. An electronic device, characterized in that the electronic device comprises the topology of any of claims 1-8 or is charged using the control method of claim 9.