CN112910054A - Charging circuit, charging device, electronic apparatus, and charging control method - Google Patents
Charging circuit, charging device, electronic apparatus, and charging control method Download PDFInfo
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- CN112910054A CN112910054A CN202110289264.3A CN202110289264A CN112910054A CN 112910054 A CN112910054 A CN 112910054A CN 202110289264 A CN202110289264 A CN 202110289264A CN 112910054 A CN112910054 A CN 112910054A
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- 238000007600 charging Methods 0.000 title claims abstract description 168
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004146 energy storage Methods 0.000 claims abstract description 42
- 238000005070 sampling Methods 0.000 claims description 39
- 238000010280 constant potential charging Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 description 17
- 238000001514 detection method Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000010277 constant-current charging Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 230000005669 field effect Effects 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
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- 230000032683 aging Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
- H02J7/00716—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current in response to integrated charge or discharge current
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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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 embodiment of the application provides a charging circuit, a charging device, electronic equipment and a charging control method, and belongs to the technical field of circuits. Wherein, the charging circuit includes: a tank circuit; the first switching device is connected between the energy storage circuit and the battery connection and is used for controlling the energy storage circuit to charge the battery; and the overcurrent protection circuit is connected with the first switching device in parallel and used for shunting the first switching device. Therefore, when the charging circuit charges the battery, the overcurrent protection circuit connected with the first switching device in parallel is used for shunting, so that the overcurrent capacity of the first switching device is increased, and the problem of insufficient overcurrent capacity of the charging device is solved.
Description
Technical Field
The present disclosure relates to the field of circuit technologies, and in particular, to a charging circuit, a charging device, an electronic device, and a charging control method.
Background
With the coming of 5G, sub6G and millimeter waves are added, the frequency of use of electronic devices by users is increasing, the power consumption of electronic devices is increasing, and the demand of users for charging technology is increasing due to the limitation of space on battery capacity, but the charging current and the charging speed are increasing, and meanwhile, the risk of charging overcurrent is also increasing. Therefore, a new power supply form is needed to improve the endurance and the service life of the battery.
Disclosure of Invention
The embodiment of the application provides a charging circuit, a charging device, an electronic device and a readable storage medium.
In a first aspect, an embodiment of the present application provides a charging circuit, including:
a tank circuit;
the first switching device is connected between the energy storage circuit and the battery connection and is used for controlling the energy storage circuit to charge the battery;
and the overcurrent protection circuit is connected with the first switching device in parallel and used for shunting the first switching device.
In a second aspect, an embodiment of the present application provides a charging device, including:
the charging circuit provided by the embodiment of the first aspect;
the processor is connected with the charging circuit and used for acquiring a first current of the first switching device; configuring an off-current of the battery according to the first current; the first switching device is turned off in a case where a charging current of the battery in a constant voltage charging stage is less than or equal to a cutoff current.
In a third aspect, an embodiment of the present application provides an electronic device, including:
the charging interface is used for being connected with an external charger;
a battery;
in an embodiment of the second aspect, the charging device is connected between the charging interface and the battery, and is configured to transmit electric energy of the external charger to the battery.
In a fourth aspect, an embodiment of the present application provides a charging control method, which is applied to the charging device provided in the second aspect, and the charging control method includes:
acquiring a first current flowing through a first switching device;
and under the condition that the first current of the battery in the constant voltage charging stage is less than or equal to the cut-off current of the battery, updating the cut-off current according to the first current, and turning off the first switching device.
In an embodiment of the present application, a charging circuit includes: a tank circuit; the first switching device is connected between the energy storage circuit and the battery connection and is used for controlling the energy storage circuit to charge the battery; and the overcurrent protection circuit is connected with the first switching device in parallel and used for shunting the first switching device. Therefore, when the charging circuit charges the battery, the overcurrent protection circuit connected with the first switching device in parallel is used for shunting, so that the overcurrent capacity of the first switching device is increased, and the problem of insufficient overcurrent capacity of the charging device is solved.
Drawings
Fig. 1 shows a block diagram of a charging circuit according to an embodiment of the present application;
FIG. 2 shows one of the circuit diagrams of a charging circuit according to one embodiment of the present application;
fig. 3 shows a second circuit diagram of a charging circuit according to an embodiment of the present application;
FIG. 4 shows a third flow diagram of a charging circuit according to an embodiment of the present application;
fig. 5 shows a block diagram of a charging device according to an embodiment of the present application;
FIG. 6 shows one of the flow diagrams of a charge control method according to one embodiment of the present application;
FIG. 7 illustrates a second flowchart of a charge control method according to an embodiment of the present application;
fig. 8 shows a block diagram of a hardware structure of an electronic device according to an embodiment of the present application.
Reference numerals:
the charging device comprises a charging device 10, a charging circuit 100, a energy storage circuit 110, a energy storage device 112, a third switching device 114, a fourth switching device 116, a first switching device 120, an overcurrent protection circuit 130, a second switching device 132, a first sampling circuit 140, a first sampling resistor 142, a first detection component 144, a second sampling circuit 150, a second sampling resistor 152, a second detection component 154, a fifth switching device 160 and a processor 200.
Detailed Description
In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.
The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specified. 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.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
A charging circuit, a charging device, an electronic apparatus, and a charging control method according to some embodiments of the present application are described below with reference to fig. 1 to 8.
In one embodiment of the present application, as shown in fig. 1 to 4, the charging circuit 100 includes: tank circuit 110, first switching device 120, overcurrent protection circuit 130.
Specifically, the first switching device 120 is connected between the tank circuit 110 and the battery connection, and the first switching device 120 is used to control the tank circuit 110 to charge the battery. The overcurrent protection circuit 130 is connected in parallel with the first switching device 120, and the overcurrent protection circuit 130 is configured to shunt current to the first switching device 120.
In this embodiment, the energy storage circuit 110 is charged by the power supply, and then the battery is charged by the energy storage circuit 110 and the first switching device 120, so as to convert the voltage output by the power supply into a charging voltage acceptable by the battery, and the battery is damaged by the excessively high surface voltage. Meanwhile, during the charging process of the battery, the charging current to be output by the tank circuit 110 is shunted by the over-current protection circuit 130, so that the current flowing through the first switching device 120 is reduced. And further, while the battery is charged by a large charging current, the overcurrent capability of the first switching device 120 is increased, and the problem of insufficient overcurrent capability of the charging device 10 is overcome.
Specifically, as shown in fig. 2 to 4, the first switching device 120 includes at least one of a Metal Oxide Semiconductor Field Effect Transistor (MOSFET), an Insulated Gate Bipolar Transistor (IGBT), and a diode. The gate of the metal oxide semiconductor field effect transistor is connected to the instruction output end of the processor 200, a reverse freewheeling diode is connected between the source and the drain of the metal oxide semiconductor field effect transistor, the base of the insulated gate bipolar transistor is connected to the instruction output end of the processor 200, and a reverse freewheeling diode is connected between the emitter and the collector of the insulated gate bipolar transistor.
Further, the system terminal of the electronic device is connected between the energy storage circuit 110 and the first switching device 120, and the first switching device 120 is also used for changing the power supply mode of the electronic device. Specifically, when the user uses the electronic device, if the first switching device 120 is turned off, the electronic device may be directly powered through the energy storage circuit 110; if the first switching device 120 is turned on, the electronic device may be powered by the battery, and at this time, the current output by the battery flows into the system end of the electronic device through the first switching device 120 and the over-current protection circuit 130. And through the shunting action of the overcurrent protection circuit 130, the overcurrent capacity of the battery of the electronic equipment during discharging can be increased, the potential safety hazard of the electronic equipment during use is reduced, and the safety of the electronic equipment is improved.
In one embodiment of the present application, as shown in fig. 1 and 2, the overcurrent protection circuit 130 includes: a second switching device 132. The second switching device 132 is connected in parallel with the first switching device 120.
In this embodiment, the second switching device 132 is connected in parallel with the first switching device 120, that is, two ends of the second switching device 132 are connected to the tank circuit 110 and the battery, respectively. When the energy storage circuit 110 outputs the charging current to the battery, the charging current is shunted at the first common terminal of the first switching device 120 and the second switching device 132, and is merged at the second common terminal of the first switching device 120 and the second switching device 132 and flows into the battery, so as to complete the charging of the battery. In one aspect, the charging current is shunted through the second switching device 132 such that the current flowing through the first switching device 120 is less than the charging current required by the battery. And then when guaranteeing to charge to the battery through great charging current, increase the ability of overflowing of first switching device 120, satisfy the demand of user to dashing soon and battery continuation of journey. On the other hand, whether the charging circuit 100 performs overcurrent protection can be controlled at any time by turning on and off the second switching device 132, so that not only the structure of the overcurrent protection circuit 130 can be simplified, but also the charging mode can be flexibly set according to different charging requirements, and the charging efficiency can be improved.
In one embodiment of the present application, as shown in fig. 2, the tank circuit 110 includes: an energy storage device 112, a third switching device 114, a fourth switching device 116.
Specifically, the energy storage device 112 is connected to the first switching device 120. The third switching device 114 is connected between the power source and the energy storage device 112, and the third switching device 114 is used for controlling the power source to charge the energy storage device 112. The fourth switching device 116 is connected between the third switching device 114 and the energy storage device 112, and the fourth switching device 116 is used for controlling the energy storage device 112 to discharge to the battery.
In this embodiment, the third switching device 114 is connected to the power source at one end and to the energy storage device 112 at the other end. One end of the fourth switching device 116 is connected to the equal potential terminal, and the other end is connected to the energy storage device 112 and the third switching device 114. When the third switching device 114 is turned on and the fourth switching device 116 is turned off, the current output by the power supply is charged in the energy storage device 112 through the third switching device 114, and the energy storage device 112 stores the electric power. When the third switching device 114 is turned off and the fourth switching device 116 and the first switching device 120 are turned on, the energy storage device 112 releases the stored electrical energy to discharge the battery. Therefore, the processor 200 switches the third switching device 114 and the fourth switching device 116, charges and discharges the energy storage device 112, realizes the charging and discharging functions of the energy storage circuit 110, and further converts the voltage output by the power supply by using the energy storage circuit 110, thereby ensuring the safety and reliability of battery charging.
Specifically, the energy storage device 112 may be an energy storage inductor or an energy storage capacitor.
In one embodiment of the present application, as shown in fig. 1 and 2, the charging circuit 100 further includes: and a fifth switching device 160. The fifth switching device 160 is connected between the power source and the third switching device 114, and the fifth switching device 160 is used to control the power source to discharge the energy storage device 112.
In this embodiment, the fifth switching device 160 is connected in series between the power supply and the third switching device 114, and the power supply discharge is controlled by turning on or off the fifth switching device 160.
Further, in a case where the system terminal of the electronic device is connected between the energy storage circuit 110 and the first switching device 120, if the third switching device 114 and the fifth switching device are turned on, the voltage output by the power supply may be converted by the energy storage device 112 and directly output to the system terminal, so as to supply power to the electronic device.
Specifically, for example, as shown in fig. 2, an inductor is used as the energy storage device 112, and a charging path of the Battery is as shown by an arrow, and the power supply output terminal (VBUS) → the fifth switching device 160 → the fourth switching device 116 → the first switching device 120 and the second switching device 132 → the Battery (Battery). The discharge path of the Battery is Battery (Battery) → the first and second switching devices 120 and 132 → the system terminal (SYS). By connecting the fifth switching device 160 in parallel at the first switching device 120 of the charging circuit 100, the overcurrent capability of the battery during charging and discharging is increased.
In one embodiment of the present application, as shown in fig. 1, 3 and 4, the charging circuit 100 further includes: a first sampling circuit 140. The first sampling circuit 140 is connected between the common terminal of the first switching device 120 and the overcurrent protection circuit 130 and the battery, and the first sampling circuit 140 is used for detecting a charging current flowing into the battery.
In this embodiment, the charging current flowing into the battery is detected by connecting the first sampling circuit 140 in series between the common terminal of the first switching device 120 and the overcurrent protection circuit 130 and the battery.
Specifically, the first sampling circuit 140 includes a first sampling resistor 142 and a first detection element 144 connected in parallel to the first sampling resistor 142, and the first detection element 144 is used to collect the current flowing through the first sampling resistor 142, so as to accurately detect the charging current after the first switching device 120 and the overcurrent protection circuit 130 are merged, so as to determine the progress of battery charging by using the charging current.
The first detecting component 144 may be a component capable of converting a current signal into a current value, such as an electricity meter, an analog-to-digital converter (ADC).
In one embodiment of the present application, as shown in fig. 3 and 4, the charging circuit 100 further includes: a second sampling circuit 150.
Specifically, the second sampling circuit 150 includes: a second sampling resistor 152 and a second sensing component 154 connected in parallel to the second sampling resistor 152. The second detecting component 154 may employ an electricity meter, an analog-to-digital converter (ADC), or the like capable of converting a current signal into a current value.
In some embodiments, the second sampling circuit 150 is connected as follows:
the first method is as follows: as shown in fig. 3, the second sampling circuit 150 is connected between the common terminal of the first switching device 120 and the over-current protection circuit 130 and the first switching device 120, and the second sampling circuit 150 is configured to sample the first current flowing through the first switching device 120.
In this embodiment, due to the shunting effect of the over-current protection circuit 130, the first current flowing through the first switching device 120 is smaller than the charging current flowing into the battery, and if the charging progress of the battery is determined by only the charging current, the battery is easily overcharged or not fully charged, the service life of the battery is reduced, and even the safety risk during the charging process of the battery is increased. To this end, the second sampling circuit 150 is provided in series between the common terminal of the first switching device 120 and the overcurrent protection circuit 130 (second switching device 132) and the first switching device 120. The first current flowing through the first switch device 120 can be collected in real time through the second sampling circuit 150, the progress of the charging process is further judged by utilizing the first current, the switching of each charging stage in the charging process is avoided to be more accurate, and the charging efficiency of the battery is improved.
The second method comprises the following steps: as shown in fig. 4, the second sampling circuit 150 is connected between the common terminal of the first switching device 120 and the over-current protection circuit 130, and the second sampling circuit 150 is configured to sample a second current flowing through the over-current protection circuit 130.
In this embodiment, the second sampling circuit 150 is connected in series between the common terminal of the first switching device 120 and the overcurrent protection circuit 130 (the second switching device 132). The second current flowing through the overcurrent protection circuit 130 (the second switching device 132) can be collected in real time by the second sampling circuit 150. So that the first current flowing through the first switching device 120 is calculated using the charging current and the second current.
It can be understood that the resistance values of the first sampling resistor 142 and the second sampling resistor 152 can be reasonably set according to the sampling precision, for example, in order to take account of precision and cost, the sampling resistor is a resistor with a resistance value of 5m Ω, and in order to further improve the sampling precision, sampling resistors with higher precision such as 3m Ω can also be used, which is not specifically limited in the embodiment of the present application.
In one embodiment of the present application, as shown in fig. 5, the charging device 10 includes: any of the above embodiments provides the charging circuit 100 and the processor 200. Therefore, the charging device 10 also includes all the advantages of the charging circuit 100 in any of the above embodiments, which are not described herein again.
Specifically, the processor 200 is connected to the charging circuit 100, and the processor 200 can control the first switching device 120, the second switching device 132, the third switching device 114, the fourth switching device 116, and the fifth switching device 160 in the charging circuit 100 to be turned on or off, so as to charge or discharge the battery. The processor 200 is further configured to obtain a first current flowing through the first switching device 120; in case that the first current of the battery in the constant voltage charging stage is less than or equal to the off-current of the battery, the off-current is updated according to the first current, and the first switching device 120 is turned off.
In this embodiment, the first switching device 120 does not obtain accurate current data due to the shunting action of the over-current protection circuit 130 during charging. In the charging process, the constant voltage stage (CV) to cut-off charging (Terminal Charge) is to perform stage conversion by collecting the current value of the first switching device 120, so that the switching from the constant voltage stage to the cut-off charging has a deviation risk, and further the battery is overcharged or not fully charged, the service life and the cruising ability of the battery are reduced, and even the safety risk in the charging process of the battery is improved. For this reason, when the first current of the battery in the constant voltage charging stage is less than or equal to the off-current of the first switching device 120 in the battery charging process set by the system, which indicates that the charging is completed at this time, the first switching device 120 is turned off to stop the current output. Meanwhile, the current value of the first current collected at this time is set as a new current value of the cut-off current through a corresponding communication protocol (for example, I2C), so that the problem that the resistance value of the first switching device 120 is deviated due to the aging of the first switching device 120 and the like, and the problem that the battery is overcharged or not fully charged is further solved, and the smooth switching from the constant voltage stage to the cut-off charging of the charging device 10 is ensured.
Further, the processor 200 is further configured to obtain a second current flowing through the overcurrent protection circuit 130 and a charging current of the battery; and performing difference operation on the charging current and the second current to obtain a first current.
In this embodiment, the processor 200 can not only detect the first current flowing through the first switching device 120 in real time through the second sampling circuit 150 of the charging circuit 100, but also obtain the charging current of the battery and the second current flowing through the second switching device 132 through the first sampling circuit 140 and the second sampling circuit 150 of the charging circuit 100. The first current of the first switching device 120 is calculated by the following formula (1), so that the detection flexibility of the first current is improved, and the detection accuracy is improved.
I1＝IBAT-I2； (1)
Wherein, I1Denotes a first current, IBATDenotes the charging current, I2Representing a second current.
It should be noted that the charging process is as follows: trickle charge → constant current phase (CC) → constant voltage phase (CV) → off-charge.
Stage 1: trickle charging; since the battery capacity is low when charging is started, trickle charging is required first, that is, a battery with low residual capacity is precharged with a small current to perform recovery charging. For example, when the battery voltage is lower than 3V, trickle charging is used, the trickle charging current is 0.1C, which is one tenth of the constant-current charging current, and the trickle charging current is 100mA as exemplified by the constant-current charging current of 1A. Where C represents the control current for the nominal capacity of the cell.
And (2) stage: charging at constant current; when the battery voltage rises to a first threshold value which is greater than or equal to the trickle charge, the charging current is increased to perform constant-current charging. For example, the current of the constant current charging is set to be between 0.2C and 1.0C. The battery voltage is stepped up with the constant current charging process.
And (3) stage: charging at constant voltage; so that the voltage between the two poles of the battery is maintained at a constant value. When the voltage of the battery rises to a second threshold value of the constant voltage charging, the constant current charging is finished, and the constant voltage charging stage is started. The current is gradually reduced from the maximum value along with the continuous charging process according to the saturation degree of the battery cell.
And (4) stage: stopping charging; when the current in the constant voltage phase decreases to the off current, it is determined that the charging is terminated. The off current can range from 0.01C to 0.1C. Of course, the duration of the constant-voltage charging phase may be used as the criterion for the cutoff of charging, for example, the charging process is terminated after two hours of continuous charging.
In one embodiment of the present application, an electronic device includes: the charging interface is used for being connected with an external charger; a battery; in the charging device provided by the above embodiment, the charging device is connected between the charging interface and the battery, and is used for transmitting the electric energy of the external charger to the battery. Therefore, the electronic device also includes all the advantages of the charging device in the above embodiments, which are not described herein again.
It is understood that the charging interface includes a standard microsusb 5pin interface, a TypeC interface, and the like. A Universal Serial Bus (USB) switch is arranged between the processor and the charging interface, the USB switch can be understood as a D +/D channel switching integrated circuit, and the processor sends a control signal to the charging interface through the D +/D channel.
In an embodiment of the present application, fig. 6 shows one of flowcharts of a charging control method of the embodiment of the present application, including:
and step 604, under the condition that the first current of the battery in the constant voltage charging stage is less than or equal to the cut-off current of the battery, updating the cut-off current according to the first current, and turning off the first switching device.
In this embodiment, due to the shunt function of the overcurrent protection circuit during charging, accurate current data cannot be obtained by measurement and sampling of the first switching device. In the charging process, the constant-voltage stage is converted into the cutoff charging mode by collecting the current value of the first switch device, so that the switching from the constant-voltage stage to the cutoff charging mode has deviation risks, the battery is overcharged or not fully charged, the service life and the cruising ability of the battery are shortened, and even the safety risk in the charging process of the battery is improved. Therefore, when the first current of the battery in the constant voltage charging stage is less than or equal to the cut-off current of the first switching device in the battery charging process set by the system, the charging is finished at the moment, and the first switching device is turned off to stop the current output. Meanwhile, the current value of the collected first current is set as the current value of a new cut-off current through a corresponding communication protocol (such as I2C), so that the problem that the resistance value of the first switching device is deviated due to the aging problem and the like of the first switching device, the problem that the battery is overcharged or not fully charged is avoided, and the smooth switching from a constant voltage stage to cut-off charging of the charging device is ensured.
In an embodiment of the present application, fig. 7 shows a second flowchart of a charging control method according to an embodiment of the present application, including:
In this embodiment, not only can the first current flowing through the first switching device be detected in real time, but also the first current of the first switching device can be calculated through the charging current of the battery and the second current flowing through the second switching device by utilizing the shunting relation, so that the detection flexibility of the first current is improved, and the detection accuracy is favorably improved.
Specifically, the first current of the first switching device is calculated by the following formula (1):
I1＝IBAT-I2； (1)
wherein, I1Denotes a first current, IBATDenotes the charging current, I2Representing a second current.
Fig. 8 is a schematic hardware structure diagram of an electronic device 800 implementing an embodiment of the present application. The electronic device 800 includes, but is not limited to: radio frequency unit 802, network module 804, audio output unit 806, input unit 808, sensors 810, display unit 812, user input unit 814, interface unit 816, memory 818, processor 820, and the like.
Those skilled in the art will appreciate that the electronic device 800 may further include a power supply (e.g., a battery) for supplying power to the various components, and the power supply may be logically connected to the processor 820 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system. The electronic device structure shown in fig. 8 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or a different arrangement of components. In the embodiment of the present application, the electronic device includes, but is not limited to, a mobile terminal, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a wearable device, a pedometer, and the like.
Wherein, the processor 820 is configured to obtain a first current flowing through the first switching device; and under the condition that the first current of the battery in the constant voltage charging stage is less than or equal to the cut-off current of the battery, updating the cut-off current according to the first current, and turning off the first switching device.
Further, the processor 820 is further configured to obtain a second current flowing through the overcurrent protection circuit and a charging current of the battery; and performing difference operation on the charging current and the second current to obtain a first current.
It should be understood that, in the embodiment of the present application, the radio frequency unit 802 may be used for transceiving information or transceiving signals during a call, and in particular, receiving downlink data of a base station or sending uplink data to the base station. The radio frequency unit 802 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
The network module 804 provides wireless broadband internet access to the user, such as assisting the user in emailing, browsing web pages, and accessing streaming media.
The audio output unit 806 may convert audio data received by the radio frequency unit 802 or the network module 804 or stored in the memory 818 into an audio signal and output as sound. Also, the audio output unit 806 may also provide audio output related to a specific function performed by the electronic device 800 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 806 includes a speaker, a buzzer, a receiver, and the like.
The input unit 808 is used to receive audio or video signals. The input Unit 808 may include a Graphics Processing Unit (GPU) 8082 and a microphone 8084, and the Graphics processor 8082 processes image data of still pictures or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 812, or stored in the memory 818 (or other storage medium), or transmitted via the radio unit 802 or the network module 804. The microphone 8084 can receive sound and can process the sound into audio data, which can be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 802 in the case of a phone call mode.
The electronic device 800 also includes at least one sensor 810, such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, a light sensor, a motion sensor, and others.
The display unit 812 is used to display information input by the user or information provided to the user. The display unit 812 may include a display panel 8122, and the display panel 8122 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
The user input unit 814 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic device. Specifically, the user input unit 814 includes a touch panel 8142 and other input devices 8144. Touch panel 8142, also referred to as a touch screen, may collect touch operations by a user on or near it. The touch panel 8142 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 820, and receives and executes commands sent by the processor 820. Other input devices 8144 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
Further, the touch panel 8142 can be overlaid on the display panel 8122, and when the touch panel 8142 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 820 to determine the type of the touch event, and then the processor 820 provides a corresponding visual output on the display panel 8122 according to the type of the touch event. The touch panel 8142 and the display panel 8122 may be provided as two separate components or may be integrated into one component.
The interface unit 816 is an interface for connecting an external device to the electronic apparatus 800. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 816 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the electronic device 800 or may be used to transmit data between the electronic device 800 and external devices.
The memory 818 may be used to store application programs as well as various data. The memory 818 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the mobile terminal, and the like. Additionally, the memory 818 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 820 performs various functions of the electronic device 800 and processes data by running or executing applications and/or modules stored in the memory 818 and invoking the data stored in the memory 818 to thereby perform overall monitoring of the electronic device 800. Processor 820 may include one or more processing units; the processor 820 may integrate an application processor, which mainly handles operations of an operating system, a user interface, an application program, etc., and a modem processor, which mainly handles operations of charging.
It should be noted that in the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
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.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A charging circuit, comprising:
a tank circuit;
the first switching device is connected between the energy storage circuit and the battery connection and is used for controlling the energy storage circuit to charge the battery;
and the overcurrent protection circuit is connected with the first switching device in parallel and used for shunting the first switching device.
2. The charging circuit of claim 1, wherein the over-current protection circuit comprises:
a second switching device connected in parallel with the first switching device.
3. The charging circuit of claim 1, wherein the tank circuit comprises:
an energy storage device connected with the first switching device;
the third switching device is connected between a power supply and the energy storage device and is used for controlling the power supply to charge the energy storage device;
and the fourth switching device is connected between the third switching device and the energy storage device and is used for controlling the energy storage device to discharge to the battery.
4. The charging circuit of claim 3, further comprising:
and the fifth switching device is connected between the power supply and the third switching device and is used for controlling the power supply to discharge to the energy storage device.
5. The charging circuit according to any one of claims 1 to 4, further comprising:
the first sampling circuit is connected between the common end of the first switching device and the overcurrent protection circuit and the battery, and is used for detecting the charging current flowing into the battery.
6. The charging circuit according to any one of claims 1 to 4, further comprising:
a second sampling circuit;
the second sampling circuit is connected between the common end of the first switching device and the overcurrent protection circuit and the first switching device, and is used for collecting a first current flowing through the first switching device; or
The second sampling circuit is connected between the common end of the first switching device and the overcurrent protection circuit and is used for collecting a second current flowing through the overcurrent protection circuit.
7. A charging device, comprising:
the charging circuit of any one of claims 1 to 6;
the processor is connected with the charging circuit and used for acquiring a first current of the first switching device; configuring a cutoff current of the battery according to the first current; turning off the first switching device when a charging current of the battery is less than or equal to the off-current.
8. An electronic device, comprising:
the charging interface is used for being connected with an external charger;
a battery;
the charging device of claim 7, connected between the charging interface and the battery for transferring power of the external charger to the battery.
9. A charging control method applied to the charging apparatus according to claim 7, the charging control method comprising:
obtaining a first current flowing through the first switching device;
and under the condition that the first current of the battery in the constant-voltage charging stage is less than or equal to the cut-off current of the battery, updating the cut-off current according to the first current, and turning off the first switching device.
10. The charge control method of claim 9, wherein said obtaining a first current of the first switching device comprises:
acquiring a second current flowing through the overcurrent protection circuit and a charging current of the battery;
and performing difference operation on the charging current and the second current to obtain the first current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289264.3A CN112910054B (en) | 2021-03-18 | Charging circuit, charging device, electronic apparatus, and charging control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289264.3A CN112910054B (en) | 2021-03-18 | Charging circuit, charging device, electronic apparatus, and charging control method |
Publications (2)
| Publication Number | Publication Date |
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| CN112910054A true CN112910054A (en) | 2021-06-04 |
| CN112910054B CN112910054B (en) | 2024-06-04 |
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