CN113013956B - Charging and discharging circuit and electronic device - Google Patents
Charging and discharging circuit and electronic device Download PDFInfo
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- CN113013956B CN113013956B CN202110391723.9A CN202110391723A CN113013956B CN 113013956 B CN113013956 B CN 113013956B CN 202110391723 A CN202110391723 A CN 202110391723A CN 113013956 B CN113013956 B CN 113013956B
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- 238000007599 discharging Methods 0.000 title claims description 11
- 230000002093 peripheral effect Effects 0.000 claims abstract description 42
- 239000003990 capacitor Substances 0.000 claims description 46
- 238000010586 diagram Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 1
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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
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Abstract
The application discloses a charge-discharge circuit and electronic equipment, and belongs to the field of electronic circuits. Wherein the charge-discharge circuit includes: the device comprises a charging interface, a power management IC, a step-up and step-down voltage charge pump IC, a battery and a 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 boost-buck 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. The charge-discharge 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 charge-discharge circuit and electronic equipment.
Background
Currently, mobile phones using dual-cell batteries are increasingly being used.
The charge-discharge circuit of the mobile phone adopting the double battery cells 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, a peripheral 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 board area and high cost.
Disclosure of Invention
The embodiment of the application aims to provide a charge and discharge circuit and electronic equipment, which can solve the problems of large occupied area and high cost.
In order to solve the technical problems, the application is realized as follows:
In a first aspect, an embodiment of the present application provides a charge-discharge circuit, including: charging interface, power management IC, step-up and step-down voltage charge pump IC, battery and peripheral hardware 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 step-up/step-down voltage charge pump IC is connected with the positive electrode of the battery;
Wherein, when the battery is in a charged state, the power management IC reduces the charging voltage provided at the charging interface to a single cell voltage of the battery to provide an operating voltage to the low voltage peripheral module and the buck-boost charge pump IC, which boosts the single cell voltage to the charging voltage of the battery to provide the charging voltage to the battery;
in a case where the battery is in a discharge state, the step-up/step-down charge pump IC reduces a discharge voltage supplied from the battery to the single cell voltage to supply an operation voltage to the power management IC, and the power management IC supplies the single cell voltage to the peripheral low voltage module as the operation voltage of the peripheral low voltage module.
In a first aspect, an embodiment of the present application provides an electronic device, including a charge-discharge circuit as described in the first aspect.
In an embodiment of the present application, a charge-discharge circuit is provided, the charge-discharge circuit includes a charge interface, a power management IC, a boost-buck 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 boost-buck 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; under the condition that the battery is in a charging state, the power management IC converts the charging voltage provided at the charging interface into a single cell voltage of the battery so as to provide working voltage for the low-voltage external equipment module and the step-up and step-down charge pump IC, and the step-up and step-down 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; in the case that the battery is in a discharge state, the step-up/step-down charge pump IC converts a discharge voltage provided by the battery into a single-cell voltage to provide an operating voltage to the power management IC, and the power management IC provides the single-cell voltage to the peripheral low-voltage module as the operating voltage of the peripheral low-voltage module. Therefore, on the basis of realizing charge and discharge by using the charge and discharge 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 charge and discharge 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 is reduced on the basis of the traditional charge and discharge circuit. Thus, the area and cost of the charge-discharge circuit can be reduced. On the other hand, the functions of the power management IC can be maximally utilized, which reduces the functional waste of the power management IC.
Drawings
Fig. 1 is a schematic diagram of a conventional charge-discharge circuit;
fig. 2 is a schematic diagram of a charge-discharge circuit according to an embodiment of the present application;
fig. 3 is a schematic diagram of a structure of a step-up/step-down charge pump IC according to an embodiment of the present application;
fig. 4 is a schematic diagram of a step-up/step-down charge pump IC according to a second embodiment of the present application;
fig. 5 is a schematic diagram III of a structure of a step-up/step-down charge pump IC according to an embodiment of the present application;
fig. 6 is a schematic diagram of a charge-discharge circuit according to a second embodiment of the present application;
Fig. 7 is a schematic diagram of a structure of a step-up/step-down charge pump IC according to an embodiment of the present application;
Fig. 8 is a schematic diagram III of a charge-discharge circuit according to an embodiment of the present application;
fig. 9 is a schematic diagram of a charge-discharge circuit according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms first, second and the like in the description and in the claims, 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 may be interchanged where appropriate such that embodiments of the application may be practiced otherwise than as specifically illustrated or described herein. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The charging and discharging circuit and the electronic device provided by the embodiment of the application are described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.
The embodiment of the application provides a charge-discharge circuit 20, and the charge-discharge circuit 20 is applied to electronic equipment. As shown in fig. 2, the battery charger comprises a charging interface 201, a power management IC 202, a step-up and step-down 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 the peripheral low-voltage module; a second terminal of the buck-boost charge pump IC 203 is connected to the positive terminal of the battery 204.
Wherein, in the case that the battery 204 is in a charged state, the power management IC 202 reduces the charging voltage provided at the charging interface 201 to a single cell voltage of the battery 204 to provide an operating voltage to the low voltage peripheral module 205 and the buck-boost charge pump IC 203, and the buck-boost charge pump IC 203 boosts the single cell voltage to the charging voltage of the battery 204 to provide the charging voltage to the battery 204; in a case where the battery 204 is in a discharge state, the step-up/step-down charge pump IC 203 reduces the discharge voltage supplied from the battery 204 to a single cell voltage to supply an operation voltage to the power management IC 202, and the power management IC 202 supplies the single cell voltage to the external low voltage module 205 as the operation voltage of the external 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 other types of charging interfaces, such as a Type-B interface. In the case where the charging interface 201 is plugged in with a charger that turns on the power, a charging voltage will be provided at the charging interface 201 and the battery 204 is in a charged state. In the case where the charging interface 201 is not plugged into a charger or a charger that is not powered on is plugged into, no charging voltage is provided at 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 the present embodiment, the buck step-down function is integrated in the power management IC 202. With the battery 204 in a charged state, the power management IC 202 utilizes an integrated buck step-down function to reduce the voltage provided at the charging interface 201 to the single cell voltage of the battery 204. Further, the power management IC 202 supplies the voltage obtained by the step-down to the peripheral low-voltage module 205 and the step-up/down charge pump IC 203. The peripheral low voltage module 205 operates with the single cell 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 provided in the electronic device. The voltage range of the single cell voltage is typically 3.4v-4.4v.
Illustratively, taking a charger specification of 5V/2A as an example, the power management IC 202 reduces the voltage of 5V to a voltage between 3.4V-4.4V. Taking the charger specification of 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 the present embodiment, when the battery 204 is in a charged state, the boost/buck charge pump IC 203 uses a boost function to boost the single-cell voltage provided by the power management IC 202 to the charged voltage of the battery 204. On this basis, the battery 204 is charged with a charging voltage supplied from the step-down 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 a case where the battery 204 is in a discharge state, the battery 204 supplies a discharge voltage to the step-up/down charge pump IC 203. The step-up and step-down charge pump IC 203 reduces the discharge voltage supplied from the battery 204 to a single cell voltage by a step-down function, and supplies the single cell voltage to the power management IC 202. The power management IC 202 operates according to the single cell voltage provided by the buck-boost charge pump IC 203. Further, the power management IC 202 provides the single cell voltage provided by the buck-boost charge pump IC 203 to the peripheral low voltage module 205. The peripheral low voltage module 205 operates with the single cell voltage provided by the power management IC 202 as an operating voltage.
The discharging voltage provided by the battery 204 to the buck-boost charge pump IC 203 is the same as the charging voltage provided by the buck-boost charge pump IC 203 to the battery 204.
In an embodiment of the present application, a charge-discharge circuit is provided, the charge-discharge circuit includes a charge interface, a power management IC, a boost-buck 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 boost-buck 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; under the condition that the battery is in a charging state, the power management IC converts the charging voltage provided at the charging interface into a single cell voltage of the battery so as to provide working voltage for the low-voltage external equipment module and the step-up and step-down charge pump IC, and the step-up and step-down 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; in the case that the battery is in a discharge state, the step-up/step-down charge pump IC converts a discharge voltage provided by the battery into a single-cell voltage to provide an operating voltage to the power management IC, and the power management IC provides the single-cell voltage to the peripheral low-voltage module as the operating voltage of the peripheral low-voltage module. Therefore, on the basis of realizing charge and discharge by using the charge and discharge 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 charge and discharge 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 is reduced on the basis of the traditional charge and discharge circuit. Thus, the area and cost of the charge-discharge circuit can be reduced. On the other hand, the functions of the power management IC can be maximally utilized, which reduces the functional waste of the power management IC.
In one embodiment of the application, the battery 204 includes two cells based on the embodiment shown in fig. 2. As shown in fig. 3, the step-up/step-down charge pump IC 203 in the charge/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 terminal and the ground terminal of the power management IC 202; four output ends of the first switch control unit 2031-1 are respectively connected with control ends of the first switch 2032-1, the second switch 2033-1, the third switch 2034-1 and the fourth switch 2035-1; a first end of the first capacitor 2036-1 is connected between the first switch 2032-1 and the second switch 2033-1, and a second end of the first capacitor 2036-1 is connected between the third switch 2034-1 and the fourth switch 2035-1; a first terminal of the second capacitor 2037-1 is connected between the second switch 2033-1 and the third switch 2034-1, and a first terminal of the second capacitor 2037-1 is connected to the positive electrode of the battery 204, and a second terminal of the second capacitor 2037-1 is grounded.
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.
In the embodiment of the present application, when the battery 204 is in a charged 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 of T1; during the T2 period, 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 can achieve boosting of the single cell voltage to the charge voltage of the battery 204. The time period T1 and the time period T2 form a charging period, and the time length of the time period T1 is the same as the time length of the time period T2.
Correspondingly, in the discharging state of the battery 204, during the period of T3, 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 the T4 period, 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 can achieve a reduction of the discharge voltage provided by the battery 204 to a single cell voltage. The time period T3 and the time period T4 form a charging period, and the time length of the time period T3 is the same as the time length of the time period T4.
In an embodiment of the present application, on the basis of any of the above embodiments, as shown in fig. 4, the step-up/down charge pump further includes a ninth switch 2039-1 and a driving circuit 2039-2 of the ninth switch 2039-1. Wherein:
A second terminal of the power management IC 202 is connected to the first switch 2032-1 through a ninth switch 2039-1, and a control terminal of the ninth switch 2039-1 is connected to an output terminal of the drive circuit 2039-2.
In fig. 4, the ninth switch 2039-1 is shown as an NMOS transistor.
In the embodiment of the application, the ninth switch can prevent the current passing through the first switch from flowing backwards to the power management IC.
It will be appreciated that, in the case where the battery 204 includes 4 cells on the basis of the embodiment shown in fig. 2, the step-up and step-down charge pump IC 203 may be realized 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 of implementing the step-up/step-down charge pump IC 203 by cascading the structures shown in fig. 3 and 4.
It will be appreciated that by cascading, the buck-boost charge pump IC 203 corresponding to the battery 204 comprising an even number of cells connected in series may 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 charge-discharge circuit 20 provided by the embodiment of the present application further includes a switch module 206 and a peripheral high-voltage module 207. Wherein:
the switching module 206 is connected between the positive electrode of the battery 204 and the peripheral high-voltage module 207, and the control terminal of the switching module 206 is connected to the output terminal of the bypass control unit 2038.
In the case where the battery 204 is in a discharge state, the bypass control unit 2038 controls the switch module 206 to be turned on, and the battery 204 supplies a discharge 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 the present embodiment, the bypass control unit 2038 is integrated in the buck-boost charge pump IC 203, and the switch module 206 is controlled to be in the on state or the off state by the bypass control unit 2038. Specifically, in the case where the battery 204 is in a discharge state, the bypass control unit 2038 controls the switch module 206 to be in a conductive state. In the case where the battery 204 is in a charged state, the bypass control unit 2038 controls the switch module 206 to be in an off state.
In one example, the switch module 206 may be one NMOS transistor, or may also be two NMOS transistors disposed back-to-back.
In the present embodiment, in the case where the switching module 206 is in the on state, the battery 204 supplies a discharge voltage of a high voltage to the external high voltage module 207 through the switching module 206 to drive the external high voltage module 207 to operate. It is understood that the battery 204 is provided with the same high voltage as the discharge voltage by the high voltage module 207 through the switch module 206.
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-cell 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 bypass control unit integrated in the boost-buck charge pump IC is used for controlling the newly added switch module to be conducted, so that a passage between the battery and the peripheral high-voltage module can be provided, and the high-voltage discharging voltage provided by the battery is used for driving the peripheral high-voltage module to work. 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 driving of the peripheral high-voltage module can be realized, so that components in the electronic equipment are saved.
In one embodiment of the application, the battery 204 includes two cells based on the embodiment shown in fig. 6. 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 terminal and the ground terminal of the power management IC 202; four output ends of the second switch control unit 2031-2 are respectively connected with control ends of the fifth switch 2032-2, the sixth switch 2033-2, the seventh switch 2034-2 and the eighth switch 2035-2; a first terminal of the third capacitor 2036-2 is connected between the fifth switch 2032-2 and the sixth switch 2033-2, and a second terminal of the third capacitor 2036-2 is connected between the seventh switch 2034-2 and the eighth switch 2035-2; a first end of the 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, and 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 switching 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 switching 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 principles of increasing and decreasing the voltage by the charge pump IC 203 can refer to the principles of increasing and decreasing the voltage by the charge pump IC 203 in the embodiment shown in fig. 3, and are not described herein.
In one embodiment of the present application, the battery 204 includes three cells based on the embodiment shown in fig. 2. As shown in fig. 8, the step-up/step-down charge pump IC 203 in the charge/discharge circuit 20 according to the embodiment of the present application includes: a third switch control unit 2031-3, a fourth switch control unit 2032-3, a tenth switch 2033-3, an eleventh switch 2034-3, a twelfth switch 2035-3, a thirteenth switch 2036-3, a fourteenth switch 2037-3, a fifteenth switch 2038-3, a sixteenth switch 2039-3, a seventeenth switch 20310-3, a fifth capacitor 20311-3, a sixth capacitor 20312-3, and a 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 terminal and the ground terminal of the power management IC 202.
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 terminal and the ground terminal of the eleventh switch 2034-3 and the twelfth switch 2035-3.
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 switches 2038-3 and the sixteen switches 2039-3, and a second terminal of the seventh capacitor 20313-3 is grounded.
Four output terminals of the third switch control unit 2031-3 are connected to control terminals of the tenth switch 2033-3, the eleventh switch 2034-3, the twelfth switch 2035-3, and the thirteenth switch 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 illustrated as NMOS transistors. In addition, the third switching control unit 2031-3 and the fourth switching control unit 2032-3 may be integrated into the same unit.
In the embodiment of the present application, in the state of charge 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 on and controls the eleventh switch 2034-3 and the thirteenth switch 2036-3 to be turned off during the T4 period. 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 T5 period, the third switch control unit 2031-3 controls the tenth switch 2033-3 and the twelfth switch 2035-3 to be turned off, and controls 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 can achieve boosting of the single cell voltage to the charge voltage of the battery 204. The time period T5 and the time period T6 form a charging period, and the time length of the time period T5 is the same as the time length of the time period T6.
Correspondingly, in a discharging 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 controls the eleventh switch 2034-3 and the thirteenth switch 2036-3 to be turned on during the T7 period. 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 T8 period, the third switch control unit 2031-3 controls the tenth switch 2033-3 and the twelfth switch 2035-3 to be turned on, and controls 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 can achieve a reduction of the discharge voltage provided by the battery 204 to a single cell voltage. The time period T7 and the time period T8 form a charging period, and the time length of the time period T7 is the same as the time length of the time period T8.
It will be appreciated that, on the basis of the embodiment shown in fig. 8, in the case where the battery 204 includes 5 cells, this can be achieved by cascading the structure shown in fig. 8.
In addition, a ninth switch 2039-1 as shown in fig. 7 may be added between the second terminal of the power management IC 202 and the tenth switch 2033-3, and the ninth switch 2039-1 is controlled by the drive circuit 2039-2, thereby realizing prevention of current flowing backward to the power management IC 202 through the tenth switch 2033-3.
In one embodiment of the present application, as shown in fig. 9, the charge-discharge circuit 20 provided in the embodiment of the present application further includes a step-down charge pump IC 208, wherein:
a buck charge pump IC 208 is connected between the charging interface 201 and the positive pole of the battery 204.
In the present embodiment, in the case where the charging interface 201 is plugged into a high-power quick charger connected to a power supply, the voltage of the high-power quick charger input connected to the power supply is reduced to the charging voltage of the battery 204 by the step-down charge pump IC 208 and supplied to the battery 204. Further, the battery 204 is charged according to the charging voltage provided by the step-down charge pump IC 208.
In this embodiment, by providing the step-down charge pump IC, the charge-discharge circuit provided in the embodiment of the present application can realize fast battery charging.
In one embodiment of the present application, as shown in fig. 9, the charge-discharge 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 an overvoltage protection module 209.
In this embodiment, the overvoltage protection module 209 provides protection for downstream electronic components (downstream electronic components are specifically electronic components on the right side of the overvoltage protection module 209 in fig. 9) from damage due to excessive voltages.
In one embodiment of the present application, as shown in fig. 9, the charge-discharge circuit 20 provided in the embodiment of the present application further includes a panel-to-panel connector 210, wherein:
a second terminal of the buck-boost charge pump IC 203 is connected to the positive terminal of the battery 204 through a battery board-to-board connector 210.
In one embodiment, the charge-discharge circuit 20 provided by the present application includes a buck charge pump IC 208. The buck charge pump IC208 is also connected to the positive electrode of the battery 204 through a board-to-board connector 210.
In the embodiment of the present application, the connection with the battery 204 is achieved through the board-to-board connection 210, so that the stability of the connection of the battery 204 can be improved.
In one embodiment of the present application, as shown in fig. 9, the charge-discharge circuit 20 provided in the embodiment of the present application further includes an electricity meter 211, wherein:
The fuel gauge 211 is connected between the positive electrode of the battery 204 and the negative electrode of the battery 204.
In an embodiment of the present application, 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 charge-discharge circuit provided by any one of the embodiments.
In one example of the application, the electronic device may be a smart phone, a notebook computer, or the like.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.
Claims (10)
1. A charge-discharge circuit, comprising: charging interface, power management IC, step-up and step-down voltage charge pump IC, battery and peripheral hardware 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 step-up/step-down voltage charge pump IC is connected with the positive electrode of the battery;
The power management IC reduces the charging voltage provided at the charging interface to a single cell voltage of the battery under the condition that the battery is in a charging state so as to provide working voltage for the peripheral low-voltage module and the step-up and step-down voltage charge pump IC, and the step-up and step-down voltage charge pump IC increases the single cell voltage to the charging voltage of the battery so as to provide the charging voltage for the battery;
in a case where the battery is in a discharge state, the step-up/step-down charge pump IC reduces a discharge voltage supplied from the battery to the single cell voltage to supply an operation voltage to the power management IC, and the power management IC supplies the single cell voltage to the peripheral low voltage module as the operation voltage of the peripheral low voltage module.
2. The circuit of claim 1, wherein the buck-boost charge pump IC includes a bypass control unit, the circuit further including a switch module and a peripheral high voltage module, wherein:
The switch module is connected between the anode 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;
and when the battery is in a discharging state, the bypass control unit controls the switch module to be conducted, and the battery provides a discharging voltage for the peripheral high-voltage module through the switch module to serve as the working voltage of the peripheral high-voltage module.
3. The circuit of claim 1, wherein the battery comprises 2 cells connected in series, and the buck-boost charge pump IC comprises: the 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 the grounding end;
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 positive electrode 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 the buck-boost charge pump IC comprises: the second switch control unit, the fifth switch, the sixth switch, the seventh switch, the eighth switch, the third capacitor and the fourth capacitor, 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 the ground end;
the four output ends of the second switch control unit are respectively connected with the 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 respectively connected between the sixth switch and the seventh switch and the positive electrode of the battery, the first end of the fourth capacitor is connected with the positive electrode 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 peripheral high-voltage 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 drive 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 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 the ground;
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 grounding 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 switches and the sixteen switches, 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;
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 overvoltage protection module, wherein:
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:
The second end of the buck-boost charge pump IC is connected with the positive electrode of the battery through the battery plate-to-plate connector.
10. An electronic device comprising a charge-discharge circuit as claimed in any one of claims 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110391723.9A CN113013956B (en) | 2021-04-12 | 2021-04-12 | Charging and discharging circuit and electronic device |
| 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 CN113013956B (en) | 2021-04-12 | 2021-04-12 | Charging and discharging circuit and electronic device |
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| Publication Number | Publication Date |
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| CN113013956A CN113013956A (en) | 2021-06-22 |
| CN113013956B true CN113013956B (en) | 2024-06-18 |
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| CN202110391723.9A Active CN113013956B (en) | 2021-04-12 | 2021-04-12 | Charging and discharging circuit and electronic device |
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| CN (1) | CN113013956B (en) |
| WO (1) | WO2022218220A1 (en) |
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| CN113013956B (en) * | 2021-04-12 | 2024-06-18 | 维沃移动通信有限公司 | Charging and 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 |
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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104682699B (en) * | 2015-03-20 | 2018-07-06 | 深圳市华星光电技术有限公司 | A kind of buck translation circuit, power management module and LCD drive g device |
| CN105049021B (en) * | 2015-07-22 | 2018-05-04 | 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 |
| US10749218B2 (en) * | 2017-11-10 | 2020-08-18 | Qualcomm Incorporated | Circuitry for charging a multi-stack battery pack |
| 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 |
| KR20200092749A (en) * | 2019-01-25 | 2020-08-04 | 삼성전자주식회사 | Integrated circuit including charging circuit and camera flash driver and operation method thereof |
| CN110311440A (en) * | 2019-07-06 | 2019-10-08 | 合肥师范学院 | A kind of power management module of wide output voltage |
| 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 |
| CN112332472B (en) * | 2020-10-13 | 2022-05-13 | 维沃移动通信有限公司 | Charging circuit, electronic device and flash lamp control method |
| CN113013956B (en) * | 2021-04-12 | 2024-06-18 | 维沃移动通信有限公司 | Charging and discharging circuit and electronic device |
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2021
- 2021-04-12 CN CN202110391723.9A patent/CN113013956B/en active Active
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| CN113013956A (en) | 2021-06-22 |
| WO2022218220A1 (en) | 2022-10-20 |
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