CN111900769A - Charging control circuit and electronic equipment - Google Patents
Charging control circuit and electronic equipment Download PDFInfo
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- CN111900769A CN111900769A CN201910372266.1A CN201910372266A CN111900769A CN 111900769 A CN111900769 A CN 111900769A CN 201910372266 A CN201910372266 A CN 201910372266A CN 111900769 A CN111900769 A CN 111900769A
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- 238000010168 coupling process Methods 0.000 abstract description 3
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- 238000007726 management method Methods 0.000 description 19
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- 238000013528 artificial neural network Methods 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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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
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the application discloses a charging control circuit and electronic equipment, wherein the electronic equipment comprises a charging interface, a control circuit, a first battery and a second battery which are mutually coupled; the charging interface is used for coupling the charger; a first battery and a second battery for receiving a charging current of the charger; a control circuit for controlling the first battery and the second battery to be connected in series when the first battery and the second battery receive a charging current; and the control circuit is also used for controlling the first battery and the second battery to be connected in parallel when the first battery and the second battery are discharged.
Description
Technical Field
The embodiment of the application relates to the technical field of terminals, in particular to a charging control circuit and electronic equipment.
Background
Terminal devices such as mobile phones and tablet computers have become essential electronic products in daily life. However, as the functions of the terminal device are more and more, the battery power of the terminal device is used for a shorter time, so that how to charge the terminal device quickly in order to not affect the user using the terminal device is a technical problem to be solved urgently. Currently, a common charging control circuit is: the output voltage of the charger is reduced by half by a high-low voltage conversion chip such as a switch capacitor (SW) and the like, and then the battery is charged. In the above manner, since the charging voltage of the battery is reduced, the charging current is increased, so that the battery can be charged quickly, but since the heat loss of the circuit in which the battery is located is proportional to the square of the current of the circuit in which the battery is located, the heat loss is large.
Disclosure of Invention
The embodiment of the application discloses a charging control circuit and electronic equipment, which are used for reducing the heat loss of a charging path and a discharging path of a battery.
A first aspect discloses an electronic device, which may include a charging interface, a control circuit, a first battery, and a second battery coupled to each other; the charging interface can be coupled with a charger; the first battery and the second battery may receive a charging current of the charger; the control circuit may control the first battery to be connected in series with the second battery when the first battery and the second battery receive the charging current; the control circuit may further control the first battery to be connected in parallel with the second battery when the first battery and the second battery are discharged. When the two batteries are charged, the two batteries are connected in series, and when the two batteries are discharged, the two batteries are connected in parallel. The total current of the charging loop can be reduced while the two batteries can be rapidly charged, so that the heat loss can be reduced, and the energy loss of the discharging loop is small.
As a possible implementation, the electronic device may further include a voltage conversion circuit, the voltage conversion circuit being coupled with the control circuit and the charging interface; the voltage conversion circuit may convert the voltage of the charging interface and supply power to the control circuit using the converted voltage. Therefore, after the charger is connected, the control circuit is powered by the charger through the voltage conversion circuit, at the moment, the first battery and the second battery are not needed to power the control circuit, and the balance of the electric quantity of the two batteries can be guaranteed.
As a possible implementation, the voltage conversion circuit may be a voltage reduction circuit. Namely: and the voltage of the charging interface is subjected to voltage reduction and conversion and then is used for supplying power for the control circuit.
As a possible implementation manner, when the charging interface is coupled to the charger and the condition of series charging is satisfied, the control circuit controls the first battery and the second battery to be connected in series, and receives the charging current, so that the heat loss can be reduced and/or the balance between the electric quantities of the first battery and the second battery can be ensured. The condition of the series charging may be that the charging currents flowing to the first battery and the second battery are respectively greater than or equal to a second threshold; the sum of the charging currents flowing to the first battery and the second battery is greater than or equal to a third threshold; the electric quantity of the first battery and the electric quantity of the second battery are respectively larger than or equal to a fourth threshold value; the voltages of the first battery and the second battery are respectively greater than or equal to a fifth threshold value; the temperature of the first battery and the second battery is within a preset range; and/or the temperatures of the charging paths of the first and second batteries are at least one of within preset ranges, respectively.
As a possible implementation manner, when the first battery and the second battery are connected in series and the condition of parallel connection is met, the control circuit may further control the first battery and the second battery to be switched from series connection to parallel connection, that is, when the two batteries meet the condition of parallel connection during series charging, the two batteries are charged in parallel connection, and the balance between the electric quantities of the first battery and the second battery may be ensured. The condition of the parallel connection may be that a difference in electric quantity between the first battery and the second battery is larger than a sixth threshold; the temperature of the first battery or the second battery is greater than a seventh threshold; the temperature of the charging path of the first battery or the second battery is greater than an eighth threshold; the electric quantity of the first battery or the second battery is larger than a ninth threshold value; the current flowing to the first battery or the second battery is less than a tenth threshold; and/or a sum of the currents flowing to the first and second cells is less than at least one of an eleventh threshold.
As a possible implementation, the electronic device may further include a first switch, a second switch, and a third switch, the first battery may include a first terminal and a second terminal, the second battery may include a third terminal and a fourth terminal, the first terminal of the first battery is coupled to the control circuit, the second terminal of the first battery is connected to the first reference signal, the third terminal of the second battery is coupled to the control circuit and the first terminal of the first battery through the first switch, the third terminal of the second battery is coupled to the charging interface, the fourth terminal of the second battery is coupled to the control circuit and the first terminal of the first battery through the second switch, and the fourth terminal of the second battery is coupled to the first reference signal through the third switch; the first battery and the second battery can be controlled to be connected in series by controlling the first switch to be turned off, the second switch to be turned on and the third switch to be turned off; the first battery and the second battery may be controlled to be connected in parallel by controlling the first switch to be on, the second switch to be off, and the third switch to be on. It can be seen that because there is no switch between the first battery and the control circuit, the switching between the series connection of the two batteries and the parallel connection, the switching between the on-off states or the plugging and unplugging of the charger will not cause the sudden power failure of the control circuit, and the first battery can be ensured to supply power to the control circuit, thereby ensuring that the control circuit does not power down.
As a possible implementation manner, the electronic device may further include a fourth switch, the third terminal of the second battery is coupled to the voltage conversion circuit and the charging interface through the fourth switch, and the control circuit may further control the connection between the charging interface and the first battery and the connection between the charging interface and the second battery by controlling the operating state of the fourth switch, so that charging safety may be protected.
As a possible approach, the first reference signal may be a ground reference signal.
A second aspect discloses a charge control circuit, which is applied to an electronic device including at least two batteries, and may include a control circuit and a switch circuit coupled, the control circuit controlling an operating state of the switch circuit; when the control circuit indicates a first control signal to the switch circuit, the switch circuit can work in a first working state according to the first control signal, so that the first battery and the second battery receive charging current, and the first battery and the second battery are connected in series; when the control circuit indicates the second control signal to the switch circuit, the switch circuit can also work in a second working state according to the second control signal, so that the first battery and the second battery are connected in parallel when the first battery and the second battery are discharged. When two batteries charge, two batteries series connection can guarantee to carry out quick charge to two batteries when, can reduce the total current in the return circuit that charges to can reduce the heat loss, and when two batteries discharged, two batteries parallel connection can guarantee that the energy loss in the return circuit that discharges is little.
As a possible manner, the charging control circuit may further include a voltage conversion circuit, and the voltage conversion circuit is coupled to the switch circuit and the control circuit respectively; the voltage conversion circuit may convert a voltage of a charging interface of the electronic device, and supply power to the control circuit using the converted voltage. Therefore, after the charger is connected, the control circuit is powered by the charger through the voltage conversion circuit, at the moment, the first battery and the second battery are not needed to power the control circuit, and the balance of the electric quantity of the two batteries can be guaranteed.
As a possible approach, the voltage conversion circuit may be a voltage reduction circuit. Namely: and performing voltage reduction conversion on the voltage of the charging interface of the electronic equipment, and supplying power to the control circuit by using the voltage after voltage reduction conversion.
As a possible way, when the charging interface of the electronic device is coupled to the charger and the serial charging condition is satisfied, the switching circuit controls the first battery and the second battery to be connected in series, so as to receive the charging current, thereby reducing the heat loss and/or ensuring the balance between the electric quantities of the first battery and the second battery. The condition of the series charging may be that the charging currents flowing to the first battery and the second battery are respectively greater than or equal to a second threshold; the sum of the charging currents flowing to the first battery and the second battery is greater than or equal to a third threshold; the electric quantity of the first battery and the electric quantity of the second battery are respectively larger than or equal to a fourth threshold value; the voltages of the first battery and the second battery are respectively greater than or equal to a fifth threshold value; the temperature of the first battery and the second battery is within a preset range; and/or the temperatures of the charging paths of the first and second batteries are at least one of within preset ranges, respectively.
As a possible mode, when the first battery and the second battery are connected in series and a parallel connection condition is met, the switching circuit may control the first battery and the second battery to be switched from the series connection to the parallel connection, so as to ensure balance between electric quantities of the first battery and the second battery. The condition of the parallel connection may be that a difference between the amount of charge of the first battery and the amount of charge of the second battery is greater than a sixth threshold; the temperature of the first battery or the temperature of the second battery is greater than a seventh threshold; the temperature of the charging path of the first battery or the temperature of the charging path of the second battery is greater than an eighth threshold; the electric quantity of the first battery or the electric quantity of the second battery is larger than a ninth threshold value; the current flowing to the first battery or the current flowing to the second battery is less than a tenth threshold; and/or a sum of the current flowing to the first cell and the current flowing to the second cell is less than at least one of an eleventh threshold.
As a possible manner, the switch circuit may include a first switch, a second switch and a third switch, the first battery includes a first end and a second end, the second battery includes a third end and a fourth end, one end of the first switch is respectively coupled to the third end of the second battery and the charging interface, the other end of the first switch is respectively coupled to the control circuit and the first end of the first battery, one end of the second switch is respectively coupled to the fourth end of the second battery and one end of the third switch, the other end of the second switch is respectively coupled to the control circuit and the first end of the first battery, and the other end of the third switch is respectively coupled to the second end of the first battery and the first reference signal; the switch circuit can control the first battery and the second battery to be connected in series by controlling the first switch to be switched off, the second switch to be switched on and the third switch to be switched off; the switch circuit may control the first battery to be connected in parallel with the second battery by controlling the first switch to be on, the second switch to be off, and the third switch to be on. It can be seen that because there is no switch between the first battery and the control circuit, the switching between the series connection of the two batteries and the parallel connection, the switching between the on-off states or the plugging and unplugging of the charger will not cause the sudden power failure of the control circuit, and the first battery can be ensured to supply power to the control circuit, thereby ensuring that the control circuit does not power down.
As a possible manner, the switch circuit may further include a fourth switch, one end of the fourth switch is coupled to one end of the first switch, and the other end of the fourth switch is coupled to the voltage converting circuit and the charging interface, respectively; the switch circuit can also control the connection of the charging interface with the first battery and the second battery according to the control signal, so that the charging safety can be protected.
As a possible approach, the first reference signal may be a ground reference signal.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application;
fig. 2 is a schematic structural diagram of another electronic device disclosed in an embodiment of the present application;
fig. 3 is a schematic structural diagram of another electronic device disclosed in the embodiment of the present application;
fig. 4 is a schematic structural diagram of a charge control circuit according to an embodiment of the present application.
Detailed Description
The embodiment of the application discloses a charging control circuit and electronic equipment.
Fig. 1 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application. As shown in fig. 1, the electronic device may include a processor 110, an internal memory 120, a charge management module 130, a power management module 140, a battery 150, a USB interface 160, an indicator 170, and the like. Among them, the battery 150 may include two batteries, i.e., a first battery and a second battery.
It is to be understood that the illustrated structure of the embodiments of the present application does not constitute a specific limitation to electronic devices. In other embodiments of the present application, an electronic device may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components may be used. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
Processor 110 may include one or more processing units, such as: the processor 110 may include an Application Processor (AP), a modem processor, a Graphics Processor (GPU), an Image Signal Processor (ISP), a controller, a video codec, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), etc. The different processing units may be separate devices or may be integrated into one or more processors.
A memory may also be provided in processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor 110. If the processor 110 needs to reuse the instruction or data, it can be called directly from the memory. Avoiding repeated accesses reduces the latency of the processor 110, thereby increasing the efficiency of the system.
Internal memory 120 may be used to store computer-executable program code, including instructions. The internal memory 120 may include a program storage area and a data storage area. Wherein the storage program area may store an operating system, an application program required for at least one function, and the like. The storage data area may store data created during use of the electronic device, and the like. In addition, the internal memory 120 may include a high-speed random access memory, and may further include a nonvolatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (UFS), and the like. The processor 110 executes various functional applications of the electronic device and data processing by executing instructions stored in the internal memory 120 and/or instructions stored in a memory provided in the processor.
The charging management module 130 is configured to receive charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 130 may receive charging input from a wired charger via the USB interface 160. In some wireless charging embodiments, the charging management module 130 may receive a wireless charging input through a wireless charging coil of the electronic device. The charging management module 130 may also supply power to the electronic device through the power management module 140 while charging the battery 150.
The power management module 140 is used to connect the battery 150, the charging management module 130 and the processor 110. The power management module 140 receives input from the battery 150 and/or the charge management module 130 to power the processor 110. The power management module 140 may also be used to monitor parameters such as battery capacity, battery cycle count, battery state of health (leakage, impedance), etc. In some other embodiments, the power management module 140 may also be disposed in the processor 110. In other embodiments, the power management module 140 and the charging management module 130 may be disposed in the same device.
The USB interface 160 is an interface conforming to the USB standard specification, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, or the like. The USB interface 160 may be used to connect a charger to charge the electronic device.
It should be understood that the interface connection relationship between the modules according to the embodiment of the present invention is only an exemplary illustration, and does not limit the structure of the electronic device. In other embodiments of the present application, the electronic device may also adopt different interface connection manners or a combination of multiple interface connection manners in the above embodiments.
The indicator 170 may be an indicator light that may be used to indicate a state of charge, a change in charge, etc.
Fig. 2 is a schematic structural diagram of another electronic device disclosed in the embodiment of the present application. As shown in fig. 2, the electronic device may include a charging interface, a control circuit, a first battery, and a second battery, which are coupled to each other. The control circuit may be the processor 110, the charge management module 130, and/or the power management module 140 of fig. 1. The first and second batteries may be the first and second batteries of fig. 1. The battery capacities of the first and second batteries may be the same. Wherein:
the charging interface is used for coupling the charger;
a first battery and a second battery for receiving a charging current of the charger;
a control circuit for controlling the first battery and the second battery to be connected in series when the first battery and the second battery receive a charging current;
and the control circuit is also used for controlling the first battery and the second battery to be connected in parallel when the first battery and the second battery are discharged.
In the prior art, when the first battery and the second battery are charged, that is, the first battery and the second battery receive a charging current, the first battery and the second battery are connected in parallel, and the charging current is the sum of the charging currents flowing to the first battery and the second battery. In the embodiment of the present application, when the first battery and the second battery are charged, the first battery and the second battery are connected in series, and at this time, the charging currents flowing to the first battery and the second battery are the same, and the current is the current of the charging loop. In the embodiment of the application, when the first battery and the second battery are charged, the first battery and the second battery are connected in series, so that the total current of a charging loop is reduced compared with the prior art, and the heat loss can be reduced.
In the embodiment of the present application, when the first battery and the second battery are discharged, the first battery is connected in parallel with the second battery. When the battery capacities of the first battery and the second battery are the same, the capacity difference between the first battery and the second battery may be smaller than a first threshold, which may be 0, when the first battery and the second battery are discharged: the capacity difference between the first battery and the second battery is as small as possible. The battery capacities of the first battery and the second battery may be different, but the battery capacity difference between the first battery and the second battery is smaller than a certain threshold value, so as to ensure that the battery capacity difference between the first battery and the second battery is as small as possible.
In one embodiment, the electronic device may further comprise three switches, namely: first switch K1Second switch K2And a third switch K3. Wherein:
the first battery includes a first end and a second end; the second cell includes a third end and a fourth end.
In one embodiment, the first terminal may be a positive terminal of the first battery and the second terminal may be a negative terminal of the first battery. The third terminal may be a positive terminal of the second battery, and the fourth terminal may be a negative terminal of the second battery.
The first terminal of the first battery may be coupled to the control circuit. The second terminal of the first battery may be connected to a first reference signal, wherein the first reference signal may be a ground reference signal.
The third end of the second battery can pass through the first switch K1The third terminal of the second battery may be coupled to the charging interface. The fourth end of the second battery can pass through a second switch K2Coupled to the control circuit and the first terminal of the first battery, and the fourth terminal of the second battery can pass through a third switch K3Coupled to the first reference signal.
The charging interface is coupled with the third terminal of the second battery and the first reference signal. The charging interface may be an interface of the charging input connection in fig. 1.
The embodiment of the application controls the first switch K through the control circuit1Second switch K2And a third switch K3The first battery and the second battery may be connected in series or in parallel. The operating state of the switch may include on or off. (control circuit for first switch K1Second switch K2And a third switch K3Not illustrated in the example figures).
In one embodiment, the control circuit may control the first switch K through the control circuit1Open, third switch K3Open, second switch K2And conducting to enable the first battery and the second battery to be connected in series.
In one embodiment, the control circuit may control the first switch K through the control circuit1Conducting, third switch K3On, the second switch K2And disconnecting to connect the first battery and the second battery in parallel.
When the first battery and the second battery receive the charging current from the charger through the charging interface, the first battery and the second battery can be considered to be charged, and when the first battery and the second battery do not receive the charging current from the charger through the charging interface and the first battery and the second battery have current output, the first battery and the second battery can be considered to be discharged. The charger may be a wired charger or a wireless charger.
It can be understood that the switch in this embodiment includes the first switch K1Second switch K2And a third switch K3And may be a device that performs on and off functions. The present embodiment is not particularly limited to the present form and shape of the switch. In one embodiment, the switch may be a Metal Oxide Semiconductor (MOS) transistor. At this time, the control circuit may be connected to the gate of the MOS transistor, and controls the switch to be turned on or off by controlling the gate voltage. For another example, the switch in this embodiment may also be a Bipolar Junction Transistor (BJT), in which case, the control circuit may be connected to a base of the BJT, and control the switch to be turned on or off by controlling a base voltage. The switch can also be a switch circuit, and the control circuit is connected with the switch circuit and controls the on or off of the switch circuit.
There may be no switch between the first battery and the control circuit, i.e. the first battery is coupled to the control circuit. When the charger is plugged, the first battery can be ensured to supply power to the control circuit, so that the control circuit is ensured not to be powered down.
In one embodiment, the electronic device may further include a voltage conversion circuit, which may be a voltage reduction circuit. Wherein:
the voltage conversion circuit is coupled with the control circuit and the charging interface;
and the voltage conversion circuit is used for converting the voltage of the charging interface and supplying power to the control circuit by using the converted voltage.
When the charger is connected to the electronic equipment through the charging interface, the voltage conversion circuit can reduce the voltage of the charging interface, the voltage after reduction is used for supplying power to the control circuit, the voltage value required by the voltage conversion to the control circuit can be ensured, and the control circuit can control the first battery and the second battery not to supply power to the control circuit. After the charger is connected, the charger supplies power to the control circuit through the voltage conversion circuit, the first battery and the second battery do not supply power to the control circuit, and after the charger is disconnected, the first battery and the second battery are connected in parallel to supply power to the control circuit. The voltage conversion circuit may be connected between the USB interface 160 and the processor 110 in fig. 1.
In one embodiment, the electronic device may further include a fourth switch K4Wherein:
the third end of the second battery passes through a fourth switch K4And the voltage conversion circuit and the charging interface are coupled.
In one embodiment, the fourth switch K may be controlled4And controlling the connection of the charging interface with the first battery and the second battery.
For example, when the electric quantity of the first battery and the second battery is greater than the preset electric quantity threshold value, the charging interface is abnormal, the voltage of the charging interface is abnormal, the current of the charging interface is abnormal, or the temperature is abnormal, the fourth switch K may be turned off4And the charging interface is disconnected from the first battery and the second battery, or the charging paths from the charging interface to the first battery and the second battery are disconnected, so that the charging safety is protected.
Or by controlling the fourth switch K4And the first battery and the second battery are connected through the connection interface, and the charging current is provided for the first battery and the second battery through the charging interface.
In one embodiment, the control circuit controls the first switch K when the charging interface is coupled to the charger1Second switch K2Third switch K3And a fourth switch K4Such that the first battery and the second battery are connected in series, the first battery and the second battery receiving a charging current. For example: the control circuit can control the first switch K1Open, second switch K2Conducting, third switch K3Off, the fourth switch K4And conducting to realize the series connection of the first battery and the second battery, and the first battery and the second battery receive the charging current.
In one embodiment, when the charging interface is coupled to a charger, the control circuit may detect whether a power difference between the first battery and the second battery is smaller than (or not larger than) a second threshold, and in a case that the power difference between the first battery and the second battery is detected to be smaller than (or not larger than) the second threshold, indicating that the balance between the first battery and the second battery is good, the control circuit may control the first battery to be connected in series with the second battery, and charge the first battery and the second battery in series. When it is detected that the power difference between the first battery and the second battery is greater than or equal to (or greater than) the second threshold, indicating that the balance between the first battery and the second battery is poor, the control circuit may first control the first battery and the second battery to be connected in parallel, and perform parallel connection charging on the first battery and the second battery, and control the first battery and the second battery to be switched from parallel connection charging to series connection charging until the power difference between the first battery and the second battery is less than (or not greater than) the second threshold.
In one embodiment, when the charging interface is coupled to the charger, the control circuit may further determine whether a condition for charging the first battery and the second battery in series is satisfied, and when the condition for charging the first battery and the second battery in series is satisfied, the control circuit may control the first battery to be connected in series with the second battery and charge the first battery and the second battery in series. When the condition for charging the first battery and the second battery in series is not satisfied, the control circuit may control the first battery and the second battery to be connected in parallel, and perform parallel connection charging on the first battery and the second battery, until the condition for charging the first battery and the second battery in series is satisfied, control the first battery and the second battery to be switched from parallel connection to series connection.
The conditions for charging the first battery and the second battery in series may be that the charging currents flowing to the first battery and the second battery are respectively greater than or equal to a third threshold, the sum of the charging currents flowing to the first battery and the second battery is greater than or equal to a fourth threshold, the electric quantities of the first battery and the second battery are respectively greater than or equal to a fifth threshold, the voltages of the first battery and the second battery are respectively greater than or equal to a sixth threshold, the temperatures of the first battery and the second battery are within a preset range, and/or the temperatures of the charging paths of the first battery and the second battery are respectively within a preset range.
For example, when the charging currents flowing to the first battery and the second battery are respectively smaller than the third threshold value, or the sum of the charging currents flowing to the first battery and the second battery is smaller than the fourth threshold value, the heat loss of the charging paths of the first battery and the second battery is smaller, and the first battery and the second battery may be charged in parallel connection. When the charging currents flowing to the first battery and the second battery are respectively greater than or equal to a third threshold value, or the sum of the charging currents flowing to the first battery and the second battery is greater than or equal to a fourth threshold value, the heat loss of the charging paths of the first battery and the second battery is relatively high, the control circuit may control the first battery and the second battery to be charged in series connection, or the control circuit may control the first battery and the second battery to be switched from charging in parallel connection to charging in series connection to reduce the heat loss.
For example, in consideration of the safety of the battery, when the electric quantity of the battery is less than a certain value or the voltage of the battery is less than a certain value, the battery cannot be charged with a large current. When the electric quantity of the first battery and the electric quantity of the second battery are respectively smaller than the fifth threshold value, the voltage of the first battery and the voltage of the second battery are respectively smaller than the sixth threshold value, the charging current flowing to the first battery and the second battery are relatively small, the heat loss of the charging paths of the first battery and the second battery is small, and therefore the first battery and the second battery can be charged in parallel connection. When the electric quantities of the first battery and the second battery are respectively greater than or equal to a fifth threshold, the voltages of the first battery and the second battery are respectively greater than or equal to a sixth threshold, the charging current flowing to the first battery and the second battery is relatively large, the heat loss of the charging paths of the first battery and the second battery is relatively high, the control circuit may control the first battery and the second battery to be charged in series connection, or the control circuit may control the first battery and the second battery to be charged in series connection from charging in parallel connection to charging in series connection so as to reduce the heat loss.
In addition, when the temperature of the first battery and/or the second battery is higher or lower than a preset range, and/or the temperature of the charging path of the first battery and/or the second battery is higher or lower than a preset range, that is: when the temperature of the battery is too high or too low, in order to ensure the charging safety, the charging current is relatively small, the heat loss of the charging path of the first battery and the second battery is small, and therefore the first battery and the second battery can be connected in parallel for charging. When the temperature of the first battery and/or the second battery is within a preset range and/or the temperature of the charging path of the first battery and/or the second battery is within a preset range, the first battery and the second battery can be charged with a large current, and at this time, the heat loss of the charging path of the first battery and the second battery is relatively high, the control circuit can control the first battery and the second battery to be charged in series connection, or the control circuit can control the first battery and the second battery to be charged from parallel connection charging to series connection charging to reduce the heat loss.
In one embodiment, when the charging interface is coupled to the charger, the control circuit may further determine whether a difference between the electric quantities of the first battery and the second battery is smaller than (or not larger than) a second threshold, and determine whether a condition for charging the first battery and the second battery in series is satisfied. And under the condition that the electric quantity difference between the first battery and the second battery is smaller than a second threshold value (or not larger than the second threshold value) and the condition that the first battery and the second battery are charged in series is met, the control circuit controls the first battery and the second battery to be connected in series and charges the first battery and the second battery in series. When the difference in electric quantity between the first battery and the second battery is greater than or equal to (or greater than) the second threshold and the condition for charging the first battery and the second battery in series is not satisfied, the first battery and the second battery may be kept connected in parallel, and the first battery and the second battery may be charged in parallel until the condition is satisfied, and the first battery and the second battery may be controlled to be charged from charging in parallel to charging in series. Wherein the second threshold may be greater than the first threshold.
In the process of judging whether the conditions of series charging of the first battery and the second battery are met or not and/or whether the electric quantity difference value between the first battery and the second battery is smaller than (or not larger than) a second threshold value or not, a fourth switch K is used for switching between the first switch K and the second switch K4Can be switched on or off.
At the fourth switch K4In the case of conduction, the control circuit may control the first battery and the second battery if the first battery and the second battery are connected in parallel at this timeThe batteries are charged in parallel connection, and the control circuit can judge whether the conditions for charging the first battery and the second battery in series are met while the first battery and the second battery are charged in parallel connection.
At the fourth switch K4In the case of disconnection, the charging paths of the first battery and the second battery are disconnected, and no charging current is input to the first battery and the second battery. At this time, the control circuit may first determine whether the condition for charging the first battery and the second battery in series is satisfied, and when the condition for charging the first battery and the second battery in series is satisfied, the control circuit may control the first switch K1Open, second switch K2Conducting, third switch K3Off, the fourth switch K4And conducting to realize the series connection of the first battery and the second battery, and the first battery and the second battery receive the charging current. The control circuit may maintain the fourth switch K when a condition for charging the first battery and the second battery in series is not satisfied4And disconnecting the charging path to maintain the disconnected state of the charging path. The control circuit can also control the first switch K1On, the second switch K2Open, third switch K3On, the fourth switch K4And conducting to realize the parallel connection of the first battery and the second battery, and the first battery and the second battery receive charging current.
When the first battery and the second battery are charged, after the first battery and the second battery are connected in series for charging, the first battery and the second battery may be kept connected in series until the first battery and the second battery are discharged, and the series connection is not switched to the parallel connection. When the first battery and the second battery are charged to satisfy the condition of parallel connection, the series connection may be switched to the parallel connection, and then the first battery and the second battery may be charged in parallel connection.
The condition of the parallel connection may be that the difference between the electric quantities of the first battery and the second battery is greater than a seventh threshold, and at this time, the difference between the electric quantities of the first battery and the second battery is large, that is, the balance between the first battery and the second battery is poor, and the first battery and the second battery may be charged by switching from the series connection charging to the parallel connection charging, so as to reduce the difference between the electric quantities of the first battery and the second battery.
The parallel connection condition may be that the temperature of the first battery or the second battery is greater than an eighth threshold, and/or the temperature of the charging path of the first battery or the second battery is greater than a seventh threshold, in which case the first battery and the second battery may be charged by switching from series connection charging to parallel connection charging.
The condition of the parallel connection may be that the amount of charge of the first battery or the second battery is greater than a ninth threshold, and when the amount of charge of the first battery or the second battery is greater than the ninth threshold, the first battery and the second battery may be charged by switching from the series connection charging to the parallel connection charging.
The condition of the parallel connection may also be that the current flowing to the first battery or the second battery is less than a tenth threshold, or the sum of the currents flowing to the first battery and the second battery is less than an eleventh threshold, at which time the heat loss of the charging paths of the first battery and the second battery is relatively low, and therefore, the first battery and the second battery may be switched from the series connection charging to the parallel connection charging.
Fig. 3 is a schematic structural diagram of another electronic device disclosed in the embodiment of the present application. As shown in fig. 3, the electronic device may include a charging interface, a control circuit, and a voltage conversion circuit, the electronic device may further include M +1 batteries, i.e., a first battery, a second battery, …, an mth battery, and an M +1 battery, and the electronic device may further include 3M +1 switches, i.e., a first switch K1A second switch K2…, 3M switch K3MAnd 3M +1 th switch K3M+1M is an integer greater than or equal to 1, wherein:
one end of the first battery passes through a first switch K1Respectively coupled with the charging interface and the voltage conversion circuit, the voltage conversion circuit is coupled with the control circuit, and one end of the first battery passes through the 3M +1 switch K3M+1Coupled to the control circuit and one end of the M +1 th battery, and the other end of the first battery passes through the second switch K2Coupled to the first reference signal, the other end of the first battery passes through a third switch K3Coupled to one end of the second battery, one end of the ith battery passes through a 3i-3 switch K3i-3Another of the i-1 th battery is coupledOne end of the ith battery passes through a 3i-2 switch K3i-2Respectively coupled to the control circuit and one end of the M +1 th battery, and the other end of the ith battery passes through the 3i-1 th switch K3i-1Coupled to the first reference signal, the other end of the ith battery passes through a 3 i-th switch K3iCoupled to one end of the (i + 1) th battery, one end of the (M + 1) th battery passes through the 3M-th switch K3MThe other end of the M +1 th battery is coupled with the control circuit, and the other end of the M +1 th battery can be connected with a first reference signal, i is 2,3, …, M-1;
the charging interface is used for coupling the charger;
m +1 batteries for receiving a charging current of the charger;
the control circuit is used for controlling the M +1 batteries to be connected in series when the M +1 batteries are charged to receive charging current;
and the control circuit is also used for controlling the M +1 batteries to be connected in parallel when the M +1 batteries are discharged.
Wherein one end of the first, second, …, Mth and M +1 th batteries may be a positive terminal, and the other end of the first, second, …, Mth and M +1 th batteries may be a negative terminal.
The electronic device shown in fig. 3 is obtained by expanding two batteries into three or more batteries, and the working principle is the same as that of the electronic device shown in fig. 2, and the detailed description may refer to the above description, which is not repeated herein.
Fig. 4 is a schematic structural diagram of a charge control circuit according to an embodiment of the present application. Fig. 4 is a charging control circuit for performing charging control of the first battery and the second battery in fig. 1. As shown in fig. 4, the charge control circuit may include a control circuit and a switching circuit coupled, wherein:
the control circuit is used for sending a control signal to the switch circuit;
the switching circuit is used for controlling the first battery and the second battery to be connected in series when the first battery and the second battery receive charging current according to the control signal, and the charging current comes from a charger coupled with the charging interface;
and the switch circuit is also used for controlling the parallel connection of the first battery and the second battery when the first battery and the second battery are discharged according to the control signal.
The control circuit may send a control signal to the switching circuit, and the switching circuit may control the first battery and the second battery to be connected in series or in parallel according to the received control signal. The control circuit may send a first control signal to the switching circuit when the first battery and the second battery are charged, and the switching circuit may control the first battery to be connected in series with the second battery according to the first control signal. When the first battery and the second battery are discharged, the control circuit may send a second control signal to the switching circuit, and the switching circuit may control the first battery and the second battery to be connected in parallel according to the second control signal. The control circuit may be the processor 110, the charging management module 130, and/or the power management module 140 in fig. 1. The first and second batteries may be the first and second batteries of fig. 1. For other related descriptions, reference may be made to the description of fig. 2, which is not repeated herein.
In one embodiment, the switching circuit may include three switches, namely: first switch K1Second switch K2And a third switch K3. Wherein:
the first battery comprises a first end and a second end, the second battery comprises a third end and a fourth end, and a first switch K1One end of the first switch K is respectively coupled with the third end of the second battery and the charging interface1Respectively coupled to the control circuit and the first end of the first battery, and a second switch K2One end of the first switch is respectively coupled with the fourth end of the second battery and the third switch K3One end of (1), a second switch K2Respectively coupled to the control circuit and the first terminal of the first battery, and a third switch K3The other end of the first battery is respectively coupled with the second end of the first battery and the first reference signal;
the switch circuit can be controlled by controlling the first switch K1Second switch K2Conducting and third switch K3Disconnecting the first battery and the second battery to be connected in series;
the switch circuit can be switched onOver-control the first switch K1Conducting second switch K2Open and third switch K3And conducting to enable the first battery and the second battery to be connected in parallel.
For a detailed description of how the switching circuit controls the first battery and the second battery to be connected in series or in parallel through the three switches, reference may be made to the description corresponding to fig. 2, which is not described herein again.
In one embodiment, the charge control circuit may further include a voltage conversion circuit, and the voltage conversion circuit may be a voltage reduction circuit. Wherein:
the voltage conversion circuit is respectively coupled with the switch circuit, the control circuit and the charging interface;
and the voltage conversion circuit is used for converting the voltage of the charging interface and supplying power to the control circuit by using the converted voltage.
The voltage conversion circuit may be the USB interface 160 of fig. 1. For a detailed description of the voltage conversion circuit, reference may be made to the description corresponding to fig. 2, which is not described herein again.
In one embodiment, the switching circuit may further include a fourth switch K4Wherein:
fourth switch K4Is coupled to the first switch K1One end of (1), a fourth switch K4The other end of the voltage conversion circuit is respectively coupled with the voltage conversion circuit and the charging interface;
and the switch circuit is also used for controlling the connection of the charging interface with the first battery and the second battery according to the control signal.
Wherein, the switch K4The detailed description of (3) can refer to the corresponding description of fig. 2, and is not repeated herein.
Fig. 4 can also be extended from two batteries to three or more batteries, and the extension concept is the same as that of the charging control circuit shown in fig. 3, and is not described herein again.
The above-mentioned embodiments, objects, technical solutions and advantages of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present application should be included in the scope of the present application.
Claims (16)
1. An electronic device, comprising a charging interface, a control circuit, a first battery and a second battery coupled to each other, wherein:
the charging interface is used for being coupled with a charger;
the first battery and the second battery are used for receiving the charging current of the charger;
the control circuit is used for controlling the first battery and the second battery to be connected in series when the first battery and the second battery receive the charging current;
the control circuit is further used for controlling the first battery and the second battery to be connected in parallel when the first battery and the second battery are discharged.
2. The electronic device of claim 1, further comprising a voltage conversion circuit, wherein:
the voltage conversion circuit is coupled with the control circuit and the charging interface;
the voltage conversion circuit is used for converting the voltage of the charging interface and supplying power to the control circuit by using the converted voltage.
3. The electronic device of claim 2, wherein the voltage conversion circuit is a voltage reduction circuit.
4. The electronic device according to any of claims 1-3, wherein the control circuit is specifically configured to:
when the charging interface is coupled with the charger and meets the condition of series charging, the control circuit controls the first battery and the second battery to be connected in series and receives the charging current;
the conditions of the series charging include at least one of:
charging currents flowing to the first battery and the second battery are respectively greater than or equal to a second threshold value;
the sum of the charging currents flowing to the first battery and the second battery is greater than or equal to a third threshold;
the electric quantity of the first battery and the electric quantity of the second battery are respectively larger than or equal to a fourth threshold value;
the voltages of the first battery and the second battery are respectively greater than or equal to a fifth threshold;
the temperature of the first battery and the second battery is within a preset range; and/or
The temperatures of the charging paths of the first battery and the second battery are respectively within a preset range.
5. The electronic device according to any one of claims 1 to 4, wherein the control circuit is further configured to, when the first battery and the second battery are connected in series and a condition of parallel connection is satisfied, control the first battery and the second battery to be switched from series connection to parallel connection;
the condition of the parallel connection includes at least one of:
the difference between the electric quantity of the first battery and the electric quantity of the second battery is larger than a sixth threshold;
the temperature of the first battery or the temperature of the second battery is greater than a seventh threshold;
the temperature of the charge path of the first battery or the temperature of the charge path of the second battery is greater than an eighth threshold;
the electric quantity of the first battery or the electric quantity of the second battery is larger than a ninth threshold value;
the current flowing to the first battery or the current flowing to the second battery is less than a tenth threshold; and/or
The sum of the current flowing to the first battery and the current flowing to the second battery is less than an eleventh threshold.
6. The electronic device of any of claims 1-5, further comprising a first switch, a second switch, and a third switch, wherein:
the first battery comprises a first end and a second end, the second battery comprises a third end and a fourth end, the first end of the first battery is coupled with the control circuit, the second end of the first battery is connected with a first reference signal, the third end of the second battery is coupled with the control circuit through the first switch, the third end of the second battery is coupled with the charging interface, the fourth end of the second battery is coupled with the first end of the first battery through the second switch, and the fourth end of the second battery is coupled with the first reference signal through the third switch;
the control circuit controls the first switch to be switched off, the second switch to be switched on and the third switch to be switched off so that the first battery and the second battery are connected in series;
the control circuit controls the first switch to be connected, the second switch to be disconnected and the third switch to be connected, so that the first battery and the second battery are connected in parallel.
7. The electronic device of claim 6, further comprising a fourth switch, wherein:
the third end of the second battery is coupled with the charging interface through the fourth switch;
the control circuit is further used for controlling the connection between the charging interface and the first battery and the connection between the charging interface and the second battery by controlling the working state of the fourth switch.
8. The electronic device of claim 6 or 7, wherein the first reference signal is a ground reference signal.
9. A charging control circuit is characterized in that the charging control circuit is applied to an electronic device, and the electronic device comprises a first battery and a second battery; the charge control circuit comprises a control circuit and a switch circuit coupled, wherein:
the control circuit is used for controlling the working state of the switch circuit;
the switch circuit is used for responding to a first control signal of the control circuit, and the switch circuit works in a first working state, so that when the first battery and the second battery receive charging current, the first battery and the second battery are connected in series;
the switching circuit is further configured to respond to a second control signal of the control circuit, and the switching circuit operates in a second operating state, so that when the first battery and the second battery are discharged, the first battery and the second battery are connected in parallel.
10. The charge control circuit of claim 9, further comprising a voltage conversion circuit, wherein:
the voltage conversion circuit is respectively coupled with the switch circuit and the control circuit;
the voltage conversion circuit is used for converting the voltage of the charging interface of the electronic equipment and supplying power to the control circuit by using the converted voltage.
11. The charge control circuit of claim 10, wherein the voltage conversion circuit is a voltage step-down circuit.
12. The charge control circuit according to any of claims 9-11, wherein the switching circuit is specifically configured to:
when the charging interface of the electronic equipment is coupled with a charger and meets the condition of serial charging, the switching circuit controls the first battery and the second battery to be connected in series and receives the charging current;
the conditions of the series charging include at least one of:
charging currents flowing to the first battery and the second battery are respectively greater than or equal to a second threshold value;
the sum of the charging currents flowing to the first battery and the second battery is greater than or equal to a third threshold;
the electric quantity of the first battery and the electric quantity of the second battery are respectively larger than or equal to a fourth threshold value;
the voltages of the first battery and the second battery are respectively greater than or equal to a fifth threshold;
the temperature of the first battery and the second battery is within a preset range; and/or
The temperatures of the charging paths of the first battery and the second battery are respectively within a preset range.
13. The charge control circuit according to any one of claims 9 to 12, wherein the switching circuit is further configured to, when the first battery and the second battery are connected in series and a condition of parallel connection is satisfied, control the first battery and the second battery to be switched from series connection to parallel connection;
the condition of the parallel connection includes at least one of:
the difference between the electric quantity of the first battery and the electric quantity of the second battery is larger than a sixth threshold;
the temperature of the first battery or the temperature of the second battery is greater than a seventh threshold;
the temperature of the charge path of the first battery or the temperature of the charge path of the second battery is greater than an eighth threshold;
the electric quantity of the first battery or the electric quantity of the second battery is larger than a ninth threshold value;
the current flowing to the first battery or the current flowing to the second battery is less than a tenth threshold; and/or
The sum of the current flowing to the first battery and the current flowing to the second battery is less than an eleventh threshold.
14. The charge control circuit of any of claims 9-13, wherein the switching circuit comprises a first switch, a second switch, and a third switch, wherein:
the first battery comprises a first end and a second end, the second battery comprises a third end and a fourth end, one end of the first switch is respectively coupled with the third end of the second battery and the charging interface, the other end of the first switch is respectively coupled with the control circuit and the first end of the first battery, one end of the second switch is respectively coupled with the fourth end of the second battery and one end of the third switch, the other end of the second switch is respectively coupled with the control circuit and the first end of the first battery, and the other end of the third switch is respectively coupled with the second end of the first battery and the first reference signal;
the switch circuit controls the first switch to be switched off, the second switch to be switched on and the third switch to be switched off so that the first battery and the second battery are connected in series;
the switch circuit controls the first switch to be turned on, the second switch to be turned off and the third switch to be turned on, so that the first battery and the second battery are connected in parallel.
15. The charge control circuit of claim 14, wherein the switching circuit further comprises a fourth switch, wherein:
one end of the fourth switch is coupled to one end of the first switch, and the other end of the fourth switch is coupled to the charging interfaces respectively;
the switch circuit is further used for controlling the connection of the charging interface with the first battery and the second battery according to the control signal.
16. The charge control circuit of claim 14 or 15, wherein the first reference signal is a reference ground signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910372266.1A CN111900769A (en) | 2019-05-06 | 2019-05-06 | Charging control circuit and electronic equipment |
| PCT/CN2020/087140 WO2020224467A1 (en) | 2019-05-06 | 2020-04-27 | Charging control circuit and electronic device |
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| CN201910372266.1A CN111900769A (en) | 2019-05-06 | 2019-05-06 | Charging control circuit and electronic equipment |
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| CN112234683A (en) * | 2020-11-10 | 2021-01-15 | 支付宝(杭州)信息技术有限公司 | Charging control method of electronic equipment and electronic equipment |
| CN113541250A (en) * | 2021-07-14 | 2021-10-22 | 维沃移动通信有限公司 | Battery charging control circuit and electronic equipment |
| CN114123385A (en) * | 2021-10-30 | 2022-03-01 | 荣耀终端有限公司 | Charging and discharging circuit, charging method and electronic equipment |
| CN114865755A (en) * | 2022-07-06 | 2022-08-05 | 荣耀终端有限公司 | Multi-battery power supply, charging and discharging method and electronic equipment |
| CN114865755B (en) * | 2022-07-06 | 2022-11-18 | 荣耀终端有限公司 | Multi-battery power supply, charging and discharging method and electronic equipment |
| WO2024007687A1 (en) * | 2022-07-06 | 2024-01-11 | 荣耀终端有限公司 | Multi-battery power supply, charging/discharging method, and electronic device |
| CN116707051A (en) * | 2022-10-26 | 2023-09-05 | 荣耀终端有限公司 | Dual-battery charge-discharge circuit, dual-battery charge-discharge method, electronic device and medium |
| CN116707051B (en) * | 2022-10-26 | 2024-04-12 | 荣耀终端有限公司 | Dual-battery charge-discharge circuit, dual-battery charge-discharge method, electronic device and medium |
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| WO2020224467A1 (en) | 2020-11-12 |
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