CN113013956A - Charging and discharging circuit and electronic equipment - Google Patents
Charging and discharging circuit and electronic equipment Download PDFInfo
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- CN113013956A CN113013956A CN202110391723.9A CN202110391723A CN113013956A CN 113013956 A CN113013956 A CN 113013956A CN 202110391723 A CN202110391723 A CN 202110391723A CN 113013956 A CN113013956 A CN 113013956A
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- 238000007599 discharging Methods 0.000 title claims abstract description 42
- 230000002093 peripheral effect Effects 0.000 claims abstract description 34
- 239000003990 capacitor Substances 0.000 claims description 44
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
Abstract
The application discloses charge-discharge circuit and electronic equipment belongs to the electronic circuit field. Wherein charge-discharge circuit includes: the charging interface, the power management IC, the buck-boost charge pump IC, the battery and the peripheral low-voltage module; the first end of the power management IC is connected with the charging interface, the second end of the power management IC is connected with the first end of the buck-boost charge pump IC, and the third end of the power management IC is connected with the peripheral low-voltage module; and the second end of the buck-boost charge pump IC is connected with the anode of the battery. The charging and discharging circuit can solve the problems of large occupied area and high cost.
Description
Technical Field
The application belongs to the field of electronic circuits, and particularly relates to a charging and discharging circuit and electronic equipment.
Background
At present, mobile phones using dual-cell batteries are increasingly widely used.
The charging and discharging circuit of the mobile phone adopting the double-cell can be shown in fig. 1. Specifically, the charging and discharging circuit comprises a Type-C interface, a buck-boost charging IC, a 2:1 buck charge pump, a power management IC, an external low-voltage module and a double-cell battery.
However, the charge/discharge circuit shown in fig. 1 has a large number of electronic components, which results in a large area of the charge/discharge circuit and high cost.
Disclosure of Invention
An object of the embodiment of the application is to provide a charge and discharge circuit and an electronic device, which can solve the problems of large occupied area and high cost.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a charge and discharge circuit, including: interface, power management IC, step-up and step-down charge pump IC, battery and peripheral hardware low pressure module charge, wherein:
the first end of the power management IC is connected with the charging interface, the second end of the power management IC is connected with the first end of the buck-boost charge pump IC, and the third end of the power management IC is connected with the peripheral low-voltage module;
the second end of the buck-boost charge pump IC is connected with the positive electrode of the battery;
wherein, when the battery is in a charging state, the power management IC reduces a charging voltage provided at the charging interface to a single core voltage of the battery to provide a working voltage to the low-voltage peripheral device module and the buck-boost charge pump IC, and the buck-boost charge pump IC boosts the single core voltage to the charging voltage of the battery to provide the charging voltage to the battery;
when the battery is in a discharging state, the buck-boost charge pump IC reduces a discharging voltage provided by the battery to the single-cell voltage to provide a working voltage to the power management IC, and the power management IC provides the single-cell voltage to the peripheral low-voltage module as the working voltage of the peripheral low-voltage module.
In a first aspect, an embodiment of the present application provides an electronic device, including the charge and discharge circuit according to the first aspect.
In the embodiment of the present application, a charge and discharge circuit is provided, and the charge and discharge circuit includes a charging interface, a power management IC, a buck-boost charge pump IC, a battery, and a peripheral low-voltage module, wherein: the first end of the power management IC is connected with the charging interface, the second end of the power management IC is connected with the first end of the buck-boost charge pump IC, and the third end of the power management IC is connected with the peripheral low-voltage module; the second end of the buck-boost charge pump IC is connected with the anode of the battery; under the condition that the battery is in a charging state, the power management IC converts a charging voltage provided by a charging interface into a single-cell voltage of the battery so as to provide a working voltage for a low-voltage external equipment module and the buck-boost charge pump IC, and the buck-boost charge pump IC converts the single-cell voltage into the charging voltage of the battery so as to provide the charging voltage for the battery; under the condition that the battery is in a discharging state, the voltage-boosting charge pump IC converts the discharging voltage provided by the battery into single-cell voltage so as to provide working voltage for the power management IC, and the power management IC provides the single-cell voltage for the external low-voltage module to serve as the working voltage of the external low-voltage module. Therefore, on the basis of realizing charging and discharging by using the charging and discharging circuit provided by the embodiment of the application, on one hand, the functions of the power management IC and the 2:1 step-down charge pump IC in the traditional charging and discharging circuit are realized by using the existing power management IC and the step-up and step-down charge pump IC provided by the embodiment of the application, so that one component can be reduced on the basis of the traditional charging and discharging circuit. Thus, the area and cost of the charge and discharge circuit can be reduced. On the other hand, the function of the power management IC can be maximally utilized, which reduces the waste of the function of the power management IC.
Drawings
FIG. 1 is a schematic diagram of a conventional charge/discharge circuit;
fig. 2 is a first schematic structural diagram of a charging and discharging circuit according to an embodiment of the present disclosure;
fig. 3 is a first schematic structural diagram of a buck-boost charge pump IC according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a buck-boost charge pump IC according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a buck-boost charge pump IC according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a charge and discharge circuit according to an embodiment of the present disclosure;
fig. 7 is a fourth schematic structural diagram of a buck-boost charge pump IC according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a charge and discharge circuit according to an embodiment of the present disclosure;
fig. 9 is a fourth schematic structural diagram of a charge and discharge circuit according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The charging and discharging circuit and the electronic device provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
The embodiment of the application provides a charging and discharging circuit 20, and the charging and discharging circuit 20 is applied to electronic equipment. As shown in fig. 2, the system includes a charging interface 201, a power management IC 202, a buck-boost charge pump IC 203, a battery 204, and a peripheral low-voltage module 205, wherein:
a first end of the power management IC 202 is connected with the charging interface 201, a second end of the power management IC 202 is connected with a first end of the buck-boost charge pump IC 203, and a third end of the power management IC 202 is connected with an external low-voltage module; a second terminal of the buck-boost charge pump IC 203 is connected to the positive terminal of the battery 204.
When the battery 204 is in a charging state, the power management IC 202 reduces the charging voltage provided at the charging interface 201 to the single-cell voltage of the battery 204 to provide a working voltage to the low-voltage peripheral module 205 and the buck-boost charge pump IC 203, and the buck-boost charge pump IC 203 raises the single-cell voltage to the charging voltage of the battery 204 to provide the charging voltage to the battery 204; in the case where the battery 204 is in the discharge state, the buck-boost charge pump IC 203 reduces the discharge voltage provided by the battery 204 to the single-core voltage to provide the operating voltage to the power management IC 202, and the power management IC 202 provides the single-core voltage to the peripheral low-voltage module 205 as the operating voltage of the peripheral low-voltage module 205.
In this embodiment, the battery 204 is composed of at least two cells.
In this embodiment, the charging interface 201 may be a Type-C interface, and may also be a charging interface of another Type, for example, a Type-B interface. In the case where a charger that is powered on is inserted into charging interface 201, a charging voltage will be provided at charging interface 201, and battery 204 is in a charged state. In the case where the charger is not inserted into the charging interface 201 or a charger that is not powered is inserted, no charging voltage is supplied to the charging interface 201, and the battery 204 is in a discharged state. The specification of the charger is usually 5V/2A and 9V/2A.
In this embodiment, the power management IC 202 integrates a buck step-down function. With battery 204 in a charged state, power management IC 202 utilizes an integrated buck voltage function to reduce the voltage provided at charging interface 201 to the single-cell voltage of battery 204. Further, the power management IC 202 provides the reduced voltage to the peripheral low voltage module 205 and the buck-boost charge pump IC 203. The peripheral low voltage module 205 operates using the single core voltage provided by the power management IC 202 as an operating voltage. In one example, the peripheral low voltage module 205 may provide an operating voltage for a sensor IC disposed in the electronic device. The voltage range of the single-cell voltage is usually 3.4v-4.4 v.
Illustratively, taking the specification of the charger as 5V/2A as an example, the power management IC 202 reduces the voltage of 5V to a voltage between 3.4V and 4.4V. Taking the specification of the charger as 9V/2A as an example, the power management IC 202 reduces the voltage of 9V to a voltage between 3.4V and 4.4V.
In this embodiment, when the battery 204 is in a charging state, the step-up/step-down charge pump IC 203 boosts the single-cell voltage provided by the power management IC 202 to the charging voltage of the battery 204 using a step-up function. On this basis, the battery 204 is charged with the charging voltage provided by the buck charge pump IC 230.
In one example, where the battery 204 is comprised of 2 cells, the voltage range of the charging voltage of the battery 204 is typically between 6.4v-8.4 v.
In the present embodiment, in the case where the battery 204 is in a discharged state, the battery 204 supplies a discharge voltage to the step-up/down charge pump IC 203. The buck-boost charge pump IC 203 reduces the discharge voltage provided by the battery 204 to a single core voltage using a buck function and provides the voltage to the power management IC 202. The power management IC 202 operates from the single core voltage provided by the buck-boost charge pump IC 203. Further, the power management IC 202 provides the single core voltage provided by the buck-boost charge pump IC 203 to the peripheral low voltage module 205. The peripheral low voltage module 205 operates using the single core voltage provided by the power management IC 202 as an operating voltage.
The discharge voltage provided by the battery 204 to the buck-boost charge pump IC 203 is the same as the charge voltage provided by the buck-boost charge pump IC 203 to the battery 204.
In the embodiment of the present application, a charge and discharge circuit is provided, and the charge and discharge circuit includes a charging interface, a power management IC, a buck-boost charge pump IC, a battery, and a peripheral low-voltage module, wherein: the first end of the power management IC is connected with the charging interface, the second end of the power management IC is connected with the first end of the buck-boost charge pump IC, and the third end of the power management IC is connected with the peripheral low-voltage module; the second end of the buck-boost charge pump IC is connected with the anode of the battery; under the condition that the battery is in a charging state, the power management IC converts a charging voltage provided by a charging interface into a single-cell voltage of the battery so as to provide a working voltage for a low-voltage external equipment module and the buck-boost charge pump IC, and the buck-boost charge pump IC converts the single-cell voltage into the charging voltage of the battery so as to provide the charging voltage for the battery; under the condition that the battery is in a discharging state, the voltage-boosting charge pump IC converts the discharging voltage provided by the battery into single-cell voltage so as to provide working voltage for the power management IC, and the power management IC provides the single-cell voltage for the external low-voltage module to serve as the working voltage of the external low-voltage module. Therefore, on the basis of realizing charging and discharging by using the charging and discharging circuit provided by the embodiment of the application, on one hand, the functions of the power management IC and the 2:1 step-down charge pump IC in the traditional charging and discharging circuit are realized by using the existing power management IC and the step-up and step-down charge pump IC provided by the embodiment of the application, so that one component can be reduced on the basis of the traditional charging and discharging circuit. Thus, the area and cost of the charge and discharge circuit can be reduced. On the other hand, the function of the power management IC can be maximally utilized, which reduces the waste of the function of the power management IC.
In an embodiment of the present application, based on the embodiment shown in fig. 2, the battery 204 includes two battery cells. As shown in fig. 3, the buck-boost charge pump IC 203 in the charge and discharge circuit 20 according to the embodiment of the present application includes: a first switch control unit 2031-1, a first switch 2032-1, a second switch 2033-1, a third switch 2034-1, a fourth switch 2035-1, a first capacitor 2036-1, and a second capacitor 2037-1, wherein:
the first switch 2032-1, the second switch 2033-1, the third switch 2034-1 and the fourth switch 2035-1 are sequentially connected in series between the second end of the power management IC 202 and the ground terminal; four output ends of the first switch control unit 2031-1 are connected to control ends of the first switch 2032-1, the second switch 2033-1, the third switch 2034-1 and the fourth switch 2035-1, respectively; a first terminal of the first capacitor 2036-1 is connected between the first switch 2032-1 and the second switch 2033-1, and a second terminal of the first capacitor 2036-1 is connected between the third switch 2034-1 and the fourth switch 2035-1; the first terminal of the second capacitor 2037-1 is connected between the second switch 2033-1 and the third switch 2034-1, the first terminal of the second capacitor 2037-1 is connected to the positive terminal of the battery 204, and the second terminal of the second capacitor 2037-1 is connected to ground.
In fig. 3, the first switch 2032-1, the second switch 2033-1, the third switch 2034-1 and the fourth switch 2035-1 are all NMOS transistors for example.
In the present embodiment, during the time period T1 when the battery 204 is in the charging state, the first switch control unit 2031-1 controls the first switch 2032-1 and the third switch 2034-1 to be turned off, and the second switch 2033-1 and the fourth switch 2035-1 to be turned on; during the period T2, the first switch control unit 2031-1 controls the first switch 2032-1 and the third switch 2034-1 to be turned on, and the second switch 2033-1 and the fourth switch 2035-1 to be turned off. In this way, the buck-boost charge pump IC 203 may achieve a boost of the single-cell voltage to the charging voltage of the battery 204. Wherein, the T1 time period and the T2 time period form a charging cycle, and the time length of the T1 time period is the same as that of the T2 time period.
Correspondingly, in the discharged state of the battery 204, the first switch control unit 2031-1 controls the first switch 2032-1 and the third switch 2034-1 to be turned on, and the second switch 2033-1 and the fourth switch 2035-1 to be turned off, during a period T3; during the period T4, the first switch control unit 2031-1 controls the first switch 2032-1 and the third switch 2034-1 to be turned off, and the second switch 2033-1 and the fourth switch 2035-1 to be turned on. In this way, the buck-boost charge pump IC 203 may achieve a reduction in the discharge voltage provided by the battery 204 to a single core voltage. Wherein, the T3 time period and the T4 time period form a charging cycle, and the time length of the T3 time period is the same as that of the T4 time period.
In an embodiment of the present application, on the basis of any of the above embodiments, as shown in fig. 4, the buck-boost charge pump further includes a driving circuit 2039-2 of a ninth switch 2039-1 and a ninth switch 2039-1. Wherein:
the second terminal of the power management IC 202 is connected to the first switch 2032-1 via a ninth switch 2039-1, and the control terminal of the ninth switch 2039-1 is connected to the output terminal of the driving circuit 2039-2.
In fig. 4, the ninth switch 2039-1 is illustrated as an NMOS transistor, for example.
In the embodiment of the present application, the ninth switch may prevent the current passing through the first switch from flowing backward to the power management IC.
It is understood that, on the basis of the embodiment shown in fig. 2, in the case that the battery 204 includes 4 cells, the buck-boost charge pump IC 203 may be implemented by cascading two structures shown in fig. 3, or by cascading two structures shown in fig. 4, or by cascading one structure shown in fig. 3 and one structure shown in fig. 4. Fig. 5 illustrates an example in which the step-up/step-down charge pump IC 203 is realized by cascading one structure shown in fig. 3 and 4.
It can be understood that, in a cascade manner, the buck-boost charge pump IC 203 corresponding to the battery 204 including other cells connected in series in an even number can be implemented.
In one embodiment of the present application, the buck-boost charge pump IC 203 includes a bypass control unit 2038. On this basis, as shown in fig. 6, the charging and discharging circuit 20 provided in the embodiment of the present application further includes a switch module 206 and an external high voltage module 207. Wherein:
the switch module 206 is connected between the positive electrode of the battery 204 and the external high voltage module 207, and the control end of the switch module 206 is connected to the output end of the bypass control unit 2038.
When the battery 204 is in a discharging state, the bypass control unit 2038 controls the switch module 206 to be turned on, and the battery 204 provides a discharging voltage to the external high-voltage module 207 through the switch module 206 as an operating voltage of the external high-voltage module 207.
In this embodiment, the buck-boost charge pump IC 203 is originally integrated with the bypass control unit 2038, and the switch module 206 is controlled to be in the on state or the off state by the bypass control unit 2038. Specifically, when the battery 204 is in the discharge state, the bypass control unit 2038 controls the switch module 206 to be in the on state. In the case where the battery 204 is in the charged state, the bypass control unit 2038 controls the switch module 206 to be in the off state.
In one example, the switch module 206 may be a single NMOS transistor, or may also be two NMOS transistors arranged back-to-back.
In the present embodiment, when the switch module 206 is in the on state, the battery 204 provides a high-voltage discharge voltage to the external high-voltage module 207 through the switch module 206 to drive the external high-voltage module 207 to operate. It is understood that the discharging voltage provided by the battery 204 to the external high voltage module 207 through the switch module 206 is a high voltage equal to the discharging voltage.
In one example, the peripheral high voltage module 207 may be a power amplifier module in an audio circuit of an electronic device that requires high voltage.
It should be noted that the voltage required by the peripheral high-voltage module in the conventional audio circuit is obtained by further boosting the single-core voltage provided by the power management IC 202 through an additional module.
In the embodiment of the application, when the battery is in a discharging state, the newly-added switch module is controlled to be turned on by using the bypass control unit integrated in the buck-boost charge pump IC, so that a path between the battery and the peripheral high-voltage module can be provided, and the peripheral high-voltage module is driven to work by using the high-voltage discharging voltage provided by the battery. Therefore, on one hand, the function of the buck-boost charge pump IC can be utilized to the maximum extent, and the function waste of the buck-boost charge pump IC is reduced. On the other hand, the direct drive of the external high-voltage module can be realized, so that components in the electronic equipment are saved.
In an embodiment of the present application, based on the embodiment shown in fig. 6, the battery 204 includes two battery cells. As shown in fig. 7, the buck-boost charge pump IC 203 includes: a second switch control unit 2031-2, a fifth switch 2032-2, a sixth switch 2033-2, a seventh switch 2034-2, an eighth switch 2035-2, a third capacitor 2036-2, and a fourth capacitor 2037-2, wherein:
the fifth switch 2032-2, the sixth switch 2033-2, the seventh switch 2034-2 and the eighth switch 2035-2 are sequentially connected in series between the second end of the power management IC 202 and the ground terminal; four output ends of the second switch control unit 2031-2 are respectively connected with control ends of a fifth switch 2032-2, a sixth switch 2033-2, a seventh switch 2034-2 and an eighth switch 2035-2; a first end of the third capacitor 2036-2 is connected between the fifth switch 2032-2 and the sixth switch 2033-2, and a second end of the third capacitor 2036-2 is connected between the seventh switch 2034-2 and the eighth switch 2035-2; a first end of a fourth capacitor 2037-2 is connected between the sixth switch 2033-2 and the seventh switch 2034-2, and the positive electrode of the battery 204, respectively, a first end of the fourth capacitor 2037-2 is connected with the positive electrode of the battery 204, and a second end of the fourth capacitor 2037-2 is grounded; the switch module 206 is connected between the first end of the fourth capacitor 2037-2 and the high voltage peripheral module 207, and the control end of the switch module 206 is connected to the bypass control unit 2038.
In fig. 7, the fifth switch 2032-2, the sixth switch 2033-2, the seventh switch 2034-2, and the eighth switch 2035-2 are all NMOS transistors, and the buck-boost charge pump IC 203 further includes a driving unit 2039-2 and a ninth switch 2039-1.
In this embodiment, the principle of the buck-boost charge pump IC 203 for achieving the voltage boosting and the voltage reducing can refer to the principle of the buck-boost charge pump IC 203 for achieving the voltage boosting and the voltage reducing in the embodiment shown in fig. 3, and the description thereof is omitted here.
In an embodiment of the present application, based on the embodiment shown in fig. 2, the battery 204 includes three cells. As shown in fig. 8, the buck-boost charge pump IC 203 in the charge and discharge circuit 20 according to the embodiment of the present application includes: third switch control unit 2031-3, fourth switch control unit 2032-3, tenth switch 2033-3, eleventh switch 2034-3, twelfth switch 2035-3, thirteenth switch 2036-3, fourteenth switch 2037-3, fifteenth switch 2038-3, sixteenth switch 2039-3, seventeenth switch 20310-3, fifth capacitor 20311-3, sixth capacitor 20312-3, and seventh capacitor 20313-3, wherein:
the tenth switch 2033-3, the eleventh switch 2034-3, the twelfth switch 2035-3, and the thirteenth switch 2036-3 are sequentially connected in series between the second end of the power management IC 202 and the ground.
The fourteenth switch 2037-3, the fifteenth switch 2038-3, the sixteenth switch 2039-3 and the seventeenth switch 20310-3 are sequentially connected in series between the connection end of the eleventh switch 2034-3 and the twelfth switch 2035-3 and the ground terminal.
A first terminal of the fifth capacitor 2038-3 is connected between the tenth switch 2033-3 and the eleventh switch 2034-3, and a second terminal of the fifth capacitor 2038-3 is connected between the twelfth switch 2035-3 and the thirteenth switch 2036-3.
A first terminal of the sixth capacitor 20312-3 is connected between the fourteenth switch 2037-3 and the fifteenth switch 2038-3, and a second terminal of the sixth capacitor 20312-3 is connected between the sixteenth switch 2039-3 and the seventeenth switch 20310-3.
A first terminal of the seventh capacitor 20313-3 is connected between the fifteen switch 2038-3 and the sixteen switch 2039-3, and a second terminal of the seventh capacitor 20313-3 is connected to ground.
Four output terminals of the third switch control units 2031-3 are connected to control terminals of the tenth, eleventh, twelfth and thirteenth switches 2033-2034-3, 2035-3 and 2036-3, respectively.
Four output terminals of the fourth switch control unit 2032-3 are connected to control terminals of a fourteenth switch 2037-3, a fifteenth switch 2038-3, a sixteenth switch 2039-3, and a seventeenth switch 20310-3, respectively.
In fig. 8, the tenth switch 2033-3, the eleventh switch 2034-3, the twelfth switch 2035-3, the thirteenth switch 2036-3, the fourteenth switch 2037-3, the fifteenth switch 2038-3, the sixteenth switch 2039-3, and the seventeenth switch 20310-3 are all NMOS transistors, for example. In addition, the third and fourth switch control units 2031-3 and 2032-3 may be integrated into the same unit.
In the present embodiment, the third switch control unit 2031-3 controls the tenth switch 2033-3 and the twelfth switch 2035-3 to be turned on and the eleventh switch 2034-3 and the thirteenth switch 2036-3 to be turned off during a period of time T4 while the battery 204 is in a charged state. The fourth switch control unit 2032-3 controls the fourteenth switch 2037-3 and the sixteenth switch 2039-3 to be turned on, and controls the fifteenth switch 2038-3 and the seventeenth switch 20310-3 to be turned off. During the period T5, the third switch control unit 2031-3 controls the tenth switch 2033-3 and the twelfth switch 2035-3 to be turned off and the eleventh switch 2034-3 and the thirteenth switch 2036-3 to be turned on. The fourth switch control unit 2032-3 controls the fourteenth switch 2037-3, the fifteenth switch 2038-3, and the seventeenth switch 20310-3 to be turned on, and controls the sixteenth switch 20310-3 to be turned off. In this way, the buck-boost charge pump IC 203 may achieve a boost of the single-cell voltage to the charging voltage of the battery 204. Wherein, the T5 time period and the T6 time period form a charging cycle, and the time length of the T5 time period is the same as that of the T6 time period.
Correspondingly, in the discharged state of the battery 204, the third switch control unit 2031-3 controls the tenth switch 2033-3 and the twelfth switch 2035-3 to be turned off and the eleventh switch 2034-3 and the thirteenth switch 2036-3 to be turned on during a period of time T7. The fourth switch control unit 2032-3 controls the fourteenth switch 2037-3 and the sixteenth switch 2039-3 to be turned off, and controls the fifteenth switch 2038-3 and the seventeenth switch 20310-3 to be turned on. During the period T8, the third switch control unit 2031-3 controls the tenth switch 2033-3 and the twelfth switch 2035-3 to be turned on and the eleventh switch 2034-3 and the thirteenth switch 2036-3 to be turned off. The fourth switch control unit 2032-3 controls the fourteenth switch 2037-3, the fifteenth switch 2038-3, and the seventeenth switch 20310-3 to be turned off, and controls the sixteenth switch 20310-3 to be turned on. In this way, the buck-boost charge pump IC 203 may achieve a reduction in the discharge voltage provided by the battery 204 to a single core voltage. Wherein, the T7 time period and the T8 time period form a charging cycle, and the time length of the T7 time period is the same as that of the T8 time period.
It is understood that, on the basis of the embodiment shown in fig. 8, in the case that the battery 204 includes 5 cells, the configuration shown in fig. 8 may be cascaded to realize the above-mentioned configuration.
In addition, a ninth switch 2039-1 as shown in fig. 7 may be added between the second end of the power management IC 202 and the tenth switch 2033-3, and the ninth switch 2039-1 is controlled by the driving circuit 2039-2, thereby achieving prevention of backward flow of current through the tenth switch 2033-3 to the power management IC 202.
In an embodiment of the present application, as shown in fig. 9, the charge and discharge circuit 20 provided in the embodiment of the present application further includes a step-down charge pump IC208, where:
the buck charge pump IC208 is connected between the charging interface 201 and the positive terminal of the battery 204.
In the present embodiment, in the case where the charging interface 201 is inserted into a high-power fast charger connected to a power supply, the voltage input from the high-power fast charger connected to the power supply is reduced to the charging voltage of the battery 204 by the step-down charge pump IC208 and is supplied to the battery 204. Further, the battery 204 is charged according to the charging voltage provided by the buck charge pump IC 208.
In this embodiment, through setting up step-down charge pump IC, the charge-discharge circuit that this application embodiment provided can realize that the battery charges soon.
In an embodiment of the present application, as shown in fig. 9, the charging and discharging circuit 20 provided in the embodiment of the present application further includes an overvoltage protection module 209, where:
a first terminal of the power management IC 202 is connected to the charging interface 201 through the overvoltage protection module 209.
In this embodiment, the overvoltage protection module 209 provides protection for downstream electronic components (specifically, downstream electronic components on the right side of the overvoltage protection module 209 in fig. 9) from excessive voltage.
In an embodiment of the present application, as shown in fig. 9, the charging and discharging circuit 20 provided in the embodiment of the present application further includes a panel-to-board connector 210, where:
the second terminal of the buck-boost charge pump IC 203 is connected to the positive terminal of the battery 204 through the panel-to-panel connector 210.
In one embodiment, the charging and discharging circuit 20 provided in the embodiment of the present application includes a buck charge pump IC208, and the buck charge pump IC208 is also connected to the positive electrode of the battery 204 through a panel-to-panel connector 210.
In the embodiment of the present application, the connection to the battery 204 is achieved by the panel-to-panel connection 210, which can improve the stability of the connection to the battery 204.
In an embodiment of the present application, as shown in fig. 9, the charging and discharging circuit 20 provided in the embodiment of the present application further includes an electricity meter 211, where:
the fuel gauge 211 is connected between the positive electrode of the battery 204 and the negative electrode of the battery 204.
In the present embodiment, the electricity meter 211 is used to detect the amount of electricity in the battery 204.
The embodiment of the application also provides electronic equipment which comprises the charging and discharging circuit provided by any one of the above embodiments.
In one example of the present application, the electronic device may be a smartphone, a laptop computer, or the like.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A charging and discharging circuit, comprising: interface, power management IC, step-up and step-down charge pump IC, battery and peripheral hardware low pressure module charge, wherein:
the first end of the power management IC is connected with the charging interface, the second end of the power management IC is connected with the first end of the buck-boost charge pump IC, and the third end of the power management IC is connected with the peripheral low-voltage module;
the second end of the buck-boost charge pump IC is connected with the positive electrode of the battery;
wherein, when the battery is in a charging state, the power management IC reduces a charging voltage provided at the charging interface to a single core voltage of the battery to provide a working voltage to the low-voltage peripheral device module and the buck-boost charge pump IC, and the buck-boost charge pump IC boosts the single core voltage to the charging voltage of the battery to provide the charging voltage to the battery;
when the battery is in a discharging state, the buck-boost charge pump IC reduces a discharging voltage provided by the battery to the single-cell voltage to provide a working voltage to the power management IC, and the power management IC provides the single-cell voltage to the peripheral low-voltage module as the working voltage of the peripheral low-voltage module.
2. The circuit of claim 1, wherein the buck-boost charge pump IC comprises a bypass control unit, the circuit further comprising a switch module and an external high voltage module, wherein:
the switch module is connected between the positive electrode of the battery and the peripheral high-voltage module, and the control end of the switch module is connected with the output end of the bypass control unit;
the bypass control unit controls the switch module to be conducted under the condition that the battery is in a discharging state, and the battery provides discharging voltage to the peripheral high-voltage module through the switch module to serve as working voltage of the peripheral high-voltage module.
3. The circuit of claim 1, wherein the battery comprises 2 cells connected in series, and wherein the buck-boost charge pump IC comprises: first switch control unit, first switch, second switch, third switch, fourth switch, first electric capacity, second electric capacity, wherein:
the first switch, the second switch, the third switch and the fourth switch are sequentially connected in series between the second end of the power management IC and a ground terminal;
four output ends of the first switch control unit are respectively connected with control ends of the first switch, the second switch, the third switch and the fourth switch;
a first end of the first capacitor is connected between the first switch and the second switch, and a second end of the first capacitor is connected between the third switch and the fourth switch;
the first end of the second capacitor is connected between the second switch and the third switch, the first end of the second capacitor is connected with the anode of the battery, and the second end of the second capacitor is grounded.
4. The circuit of claim 2, wherein the battery comprises 2 cells connected in series, and wherein the buck-boost charge pump IC comprises: second switch control unit, fifth switch, sixth switch, seventh switch, eighth switch, third electric capacity and fourth electric capacity, wherein:
the fifth switch, the sixth switch, the seventh switch and the eighth switch are sequentially connected in series between the second end of the power management IC and a ground terminal;
four output ends of the second switch control unit are respectively connected with control ends of the fifth switch, the sixth switch, the seventh switch and the eighth switch;
a first end of the third capacitor is connected between the fifth switch and the sixth switch, and a second end of the third capacitor is connected between the seventh switch and the eighth switch;
the first end of the fourth capacitor is connected between the sixth switch and the seventh switch and the anode of the battery respectively, the first end of the fourth capacitor is connected with the anode of the battery, and the second end of the fourth capacitor is grounded;
the switch module is connected between the first end of the fourth capacitor and the high-voltage peripheral module, and the control end of the switch module is connected with the bypass control unit.
5. The circuit of claim 3, wherein the buck-boost charge pump IC further comprises a ninth switch and a driving circuit for the ninth switch, wherein:
the second end of the power management IC is connected with the first switch through the ninth switch, and the control end of the ninth switch is connected with the output end of the driving circuit.
6. The circuit of claim 1, wherein the battery comprises 3 cells connected in series, and wherein the buck-boost charge pump IC comprises: a third switch control unit, a fourth switch control unit, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, a sixteenth switch, a seventeenth switch, a fifth capacitor, a sixth capacitor, and a seventh capacitor, wherein:
the tenth switch, the eleventh switch, the twelfth switch and the thirteenth switch are sequentially connected in series between the second end of the power management IC and a ground terminal;
the fourteenth switch, the fifteenth switch, the sixteenth switch and the seventeenth switch are sequentially connected in series between a connection end of the eleventh switch and the twelfth switch and a ground end;
a first end of the fifth capacitor is connected between the tenth switch and the eleventh switch, and a second end of the fifth capacitor is connected between the twelfth switch and the thirteenth switch;
a first end of the sixth capacitor is connected between the fourteenth switch and the fifteenth switch, and a second end of the sixth capacitor is connected between the sixteenth switch and the seventeenth switch;
a first end of the seventh capacitor is connected between the fifteen switch and the sixteen switch, and a second end of the seventh capacitor is grounded;
four output ends of the third switch control unit are respectively connected with control ends of the tenth switch, the eleventh switch, the twelfth switch and the thirteenth switch;
and four output ends of the fourth switch control unit are respectively connected with control ends of the fourteenth switch, the fifteenth switch, the sixteenth switch and the seventeenth switch.
7. The circuit of claim 1, further comprising a buck charge pump IC, wherein:
the step-down charge pump IC is connected between the charging interface and the positive electrode of the battery.
8. The circuit of claim 1, further comprising an over-voltage protection module, wherein:
and the first end of the power management IC is connected with the charging interface through the overvoltage protection module.
9. The circuit of claim 1, further comprising a panel-to-panel connector, wherein:
and the second end of the buck-boost charge pump IC is connected with the anode of the battery through the battery panel-to-board connector.
10. An electronic device, characterized in that the electronic device comprises a charging and discharging circuit according to any of claims 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110391723.9A CN113013956A (en) | 2021-04-12 | 2021-04-12 | Charging and discharging circuit and electronic equipment |
| PCT/CN2022/085782 WO2022218220A1 (en) | 2021-04-12 | 2022-04-08 | Charging/discharging circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110391723.9A CN113013956A (en) | 2021-04-12 | 2021-04-12 | Charging and discharging circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113013956A true CN113013956A (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110391723.9A Pending CN113013956A (en) | 2021-04-12 | 2021-04-12 | Charging and discharging circuit and electronic equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113013956A (en) |
| WO (1) | WO2022218220A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114069772A (en) * | 2021-10-27 | 2022-02-18 | 北京小米移动软件有限公司 | Power supply circuit, power supply method, power supply device and storage medium |
| WO2022218220A1 (en) * | 2021-04-12 | 2022-10-20 | 维沃移动通信有限公司 | Charging/discharging circuit and electronic device |
| CN114069772B (en) * | 2021-10-27 | 2024-04-26 | 北京小米移动软件有限公司 | Power supply circuit, power supply method, power supply device and storage medium |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682699A (en) * | 2015-03-20 | 2015-06-03 | 深圳市华星光电技术有限公司 | Boost-buck conversion circuit, power management module and liquid crystal driving device |
| CN105049021A (en) * | 2015-07-22 | 2015-11-11 | 工业和信息化部电子第五研究所 | High-reliability negative-pressure charge pump circuit and integrated circuit |
| CN207150424U (en) * | 2017-07-31 | 2018-03-27 | 珠海市魅族科技有限公司 | A kind of power management chip, electric power system and electronic equipment |
| CN207530551U (en) * | 2017-06-08 | 2018-06-22 | 维沃移动通信有限公司 | A kind of charge-discharge circuit and mobile terminal |
| CN109120149A (en) * | 2018-09-29 | 2019-01-01 | 上海晶丰明源半导体股份有限公司 | Voltage raising and reducing charge pump, voltage management chip, device and method |
| CN110311440A (en) * | 2019-07-06 | 2019-10-08 | 合肥师范学院 | A kind of power management module of wide output voltage |
| US20200241390A1 (en) * | 2019-01-25 | 2020-07-30 | Samsung Electronics Co., Ltd. | Integrated circuits including charging circuit and flash driver, methods of operating the integrated circuits, and electronic devices including the integrated circuits |
| WO2020166877A1 (en) * | 2019-02-12 | 2020-08-20 | 주식회사 실리콘마이터스 | Power management apparatus usable in battery having plurality of cells connected in series |
| KR20200099057A (en) * | 2019-02-12 | 2020-08-21 | 주식회사 실리콘마이터스 | A power management device usable for a battery having a plurality of cells connected in series |
| CN112332472A (en) * | 2020-10-13 | 2021-02-05 | 维沃移动通信有限公司 | Charging circuit, electronic device and flash lamp control method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10749218B2 (en) * | 2017-11-10 | 2020-08-18 | Qualcomm Incorporated | Circuitry for charging a multi-stack battery pack |
| CN110336353A (en) * | 2019-07-09 | 2019-10-15 | Oppo广东移动通信有限公司 | Battery, circuit system and its control method, electronic equipment |
| CN210867228U (en) * | 2019-11-04 | 2020-06-26 | 中山市悦辰电子实业有限公司 | Automatic charging and discharging detection circuit applied to high-battery-voltage sound box |
| CN113013956A (en) * | 2021-04-12 | 2021-06-22 | 维沃移动通信有限公司 | Charging and discharging circuit and electronic equipment |
-
2021
- 2021-04-12 CN CN202110391723.9A patent/CN113013956A/en active Pending
-
2022
- 2022-04-08 WO PCT/CN2022/085782 patent/WO2022218220A1/en unknown
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682699A (en) * | 2015-03-20 | 2015-06-03 | 深圳市华星光电技术有限公司 | Boost-buck conversion circuit, power management module and liquid crystal driving device |
| CN105049021A (en) * | 2015-07-22 | 2015-11-11 | 工业和信息化部电子第五研究所 | High-reliability negative-pressure charge pump circuit and integrated circuit |
| CN207530551U (en) * | 2017-06-08 | 2018-06-22 | 维沃移动通信有限公司 | A kind of charge-discharge circuit and mobile terminal |
| CN207150424U (en) * | 2017-07-31 | 2018-03-27 | 珠海市魅族科技有限公司 | A kind of power management chip, electric power system and electronic equipment |
| CN109120149A (en) * | 2018-09-29 | 2019-01-01 | 上海晶丰明源半导体股份有限公司 | Voltage raising and reducing charge pump, voltage management chip, device and method |
| US20200241390A1 (en) * | 2019-01-25 | 2020-07-30 | Samsung Electronics Co., Ltd. | Integrated circuits including charging circuit and flash driver, methods of operating the integrated circuits, and electronic devices including the integrated circuits |
| WO2020166877A1 (en) * | 2019-02-12 | 2020-08-20 | 주식회사 실리콘마이터스 | Power management apparatus usable in battery having plurality of cells connected in series |
| KR20200099057A (en) * | 2019-02-12 | 2020-08-21 | 주식회사 실리콘마이터스 | A power management device usable for a battery having a plurality of cells connected in series |
| CN110311440A (en) * | 2019-07-06 | 2019-10-08 | 合肥师范学院 | A kind of power management module of wide output voltage |
| CN112332472A (en) * | 2020-10-13 | 2021-02-05 | 维沃移动通信有限公司 | Charging circuit, electronic device and flash lamp control method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218220A1 (en) * | 2021-04-12 | 2022-10-20 | 维沃移动通信有限公司 | Charging/discharging circuit and electronic device |
| CN114069772A (en) * | 2021-10-27 | 2022-02-18 | 北京小米移动软件有限公司 | Power supply circuit, power supply method, power supply device and storage medium |
| CN114069772B (en) * | 2021-10-27 | 2024-04-26 | 北京小米移动软件有限公司 | Power supply circuit, power supply method, power supply device and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022218220A1 (en) | 2022-10-20 |
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