CN117996879A

CN117996879A - Control circuit, charging circuit, electronic device, control method and medium

Info

Publication number: CN117996879A
Application number: CN202211347983.7A
Authority: CN
Inventors: 汪会; 唐科狄
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2024-05-07

Abstract

The present disclosure relates to a control circuit, a charging circuit, an electronic device, a control method, and a medium, the control circuit including: a switching unit connected in series with the first rechargeable battery in the rechargeable battery pack connected in parallel; the control unit is connected with the switch unit and is configured to control the switch unit to be opened or closed according to whether the charging path of the first rechargeable battery reaches a preset on voltage so as to open or close the charging path of the first rechargeable battery. This disclosure can adopt a chip that charges to charge to a plurality of rechargeable batteries, and can not appear charging current and surpass rechargeable battery's specification requirement, guarantees the safety of charging.

Description

Control circuit, charging circuit, electronic device, control method and medium

Technical Field

The disclosure relates to the technical field of electronic equipment, and in particular relates to a control circuit, a charging circuit, electronic equipment, a control method and a medium.

Background

When the electronic equipment is charged, the charger charges the battery through the charging chip, and the charging chip monitors parameters such as current, voltage, temperature and the like in the whole charging process so as to ensure charging safety. In order to increase the endurance of a portable electronic device, it is possible to increase the battery capacity of the electronic device, and a plurality of rechargeable batteries are usually disposed in the electronic device. In order to ensure the charging safety of an electronic device provided with a plurality of rechargeable batteries, each rechargeable battery needs to be monitored and managed in the charging process. In the related art, a plurality of rechargeable batteries are respectively charged and managed by providing a plurality of charging chips, or a plurality of rechargeable batteries are simultaneously charged and managed by adopting one charging chip. But set up a plurality of charging chips and can increase electronic equipment's manufacturing cost, only set up a charging chip and can lead to the charging current size of a plurality of rechargeable batteries uncontrolled, have great potential safety hazard.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides a control circuit, a charging circuit, an electronic device, a control method, and a medium.

A first aspect of the present disclosure proposes a control circuit comprising:

a switching unit connected in series with a first rechargeable battery in the rechargeable battery pack connected in parallel;

The control unit is connected with the switch unit and is configured to control the switch unit to be opened or closed according to whether the charging path of the first rechargeable battery reaches a preset conducting voltage or not so as to open or close the charging path of the first rechargeable battery.

In some embodiments of the present disclosure, the control unit includes:

A first voltage acquisition module configured to acquire an input voltage VIN and an output voltage VOUT of the switching unit;

And the control module is configured to determine whether a charging path of the first rechargeable battery reaches a preset conducting voltage according to the input voltage VIN and the output voltage VOUT, and control the switch unit to be opened or closed.

In some embodiments of the disclosure, the control module is configured to:

When VIN is larger than VOUT-V1, determining that a charging path where the first rechargeable battery is located reaches the preset conducting voltage, and controlling the switch unit to be opened;

When VIN is less than or equal to VOUT-V1, determining that a charging path of the first rechargeable battery does not reach the preset conducting voltage, and controlling the switch unit to be closed;

and V1 is a voltage threshold value corresponding to a preset charging current threshold value of other rechargeable batteries in the rechargeable battery pack when the first rechargeable battery is in a first preset state.

In some embodiments of the present disclosure, the control unit further includes:

The second voltage acquisition module is configured to acquire voltage values at two ends of a preset resistor connected with the control unit;

The control module is configured to determine the maximum current of the charging path where the first rechargeable battery is located according to the voltage values of the two ends of the preset resistor and the resistance value of the preset resistor.

In some embodiments of the present disclosure, the preset resistance includes a resistance grounded through a first preset pin of the control unit.

In some embodiments of the disclosure, the control module is configured to:

and controlling the conduction state of the switch unit according to the maximum current of the charging path where the first rechargeable battery is located.

a third voltage acquisition module configured to acquire a ground voltage VDET of the first rechargeable battery;

The control module is configured to determine whether the charging path is conductive according to the ground voltage VDET.

In some embodiments of the present disclosure, the control module is configured to determine that a charging path in which the first rechargeable battery is located is not turned on when the ground voltage VDET is greater than or equal to V2, and control the switch unit to close the charging path in which the first rechargeable battery is located; wherein V2 is more than or equal to 0.

In some embodiments of the disclosure, the control unit includes a second preset pin, the second preset pin being connected to the negative electrode of the first rechargeable battery;

The third voltage acquisition module is configured to acquire the voltage of the second preset pin.

In some embodiments of the disclosure, the switching unit is a transistor; the control unit comprises a third preset pin, a fourth preset pin and a fifth preset pin;

the third preset pin is connected with the grid electrode of the triode to control the opening, closing and conducting states of the triode;

the fourth preset pin is connected with the source electrode of the triode, and the fifth preset pin is connected with the drain electrode of the triode so as to obtain the input voltage VIN and the output voltage VOUT.

A second aspect of the present disclosure proposes a charging circuit including:

A charger;

the rechargeable battery pack is connected with the charger in series and comprises a plurality of rechargeable batteries connected in parallel;

The control circuit is connected with a first rechargeable battery in the rechargeable battery pack; the control circuit is the control circuit provided by the first aspect of the disclosure;

wherein the first rechargeable battery is selected among the rechargeable battery packs according to battery capacity.

A third aspect of the present disclosure proposes an electronic device comprising a charging circuit as proposed in the second aspect of the present disclosure.

A fourth aspect of the present disclosure proposes a control method of a circuit, the circuit including a rechargeable battery pack and a switch unit for opening and closing a charging path in which a first rechargeable battery in the rechargeable battery pack is located; the control method comprises the following steps:

And controlling the switch unit to be opened or closed according to whether the charging path of the first rechargeable battery reaches a preset conducting voltage so as to open or close the charging path of the first rechargeable battery.

In some embodiments of the disclosure, the controlling the switch unit to open or close according to whether the charging path of the first rechargeable battery reaches a preset conducting voltage, so as to open or close the charging path of the first rechargeable battery includes:

Acquiring an input voltage VIN and an output voltage VOUT of the switch unit;

And determining whether a charging path of the first rechargeable battery reaches a preset conducting voltage according to the input voltage VIN and the output voltage VOUT, and controlling the switch unit to be opened or closed.

In some embodiments of the disclosure, the determining, according to the input voltage VIN and the output voltage VOUT, whether the charging path of the first rechargeable battery reaches a preset on voltage, and controlling the switch unit to be turned on or off includes:

When VIN is larger than VOUT-V1, determining that a charging path where the first rechargeable battery is located reaches a preset conducting voltage, and controlling the switch unit to be opened;

When VIN is less than or equal to VOUT-V1, determining that a charging path where the first rechargeable battery is located does not reach a preset conducting voltage, and controlling the switch unit to be closed;

In some embodiments of the present disclosure, the control method further includes:

Acquiring voltage values of two ends of a preset resistor connected with the control unit;

And determining the maximum current of a charging path where the first rechargeable battery is positioned according to the voltage values of the two ends of the preset resistor and the resistance value of the preset resistor.

acquiring a ground voltage VDET of the first rechargeable battery;

and determining whether a charging path where the first rechargeable battery is positioned is conducted or not according to the ground voltage VDET.

In some embodiments of the present disclosure, the determining, according to the ground voltage VDET, whether the charging path in which the first rechargeable battery is located is turned on includes:

when the ground voltage VDET is more than or equal to V2, determining that a charging passage where the first rechargeable battery is located is not conducted, and closing the charging passage where the first rechargeable battery is located; wherein V2 is more than or equal to 0.

The fifth aspect of the present disclosure also proposes a non-transitory computer-readable storage medium, which when executed by a processor of an electronic device, enables the electronic device to perform the control method proposed by the fourth aspect of the present disclosure.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:

In the embodiment of the disclosure, a plurality of rechargeable batteries in the rechargeable battery pack are simultaneously charged and managed by adopting one charging chip, and a charging path where any one of the rechargeable batteries in the rechargeable battery pack is located is controlled by setting a control circuit, so that under related battery scenes, the situation that charging current exceeds the specification requirement of the corresponding rechargeable battery in the process of charging other rechargeable batteries by the rechargeable battery or in the process of charging the rechargeable battery by the other rechargeable battery is avoided, and potential safety hazards are reduced. In addition, a plurality of rechargeable batteries in the battery pack in the embodiment of the disclosure can be assembled at will, so that the production assembly process and the after-sales maintenance process are simplified.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

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

Fig. 1 is a schematic diagram of a charging circuit in the related art.

Fig. 2 is a schematic diagram of a charging circuit in the related art.

Fig. 3 is a schematic diagram of a charging circuit shown according to an embodiment.

Fig. 4 is a schematic diagram of a control unit shown according to an embodiment.

Fig. 5 is a control flow diagram of the circuit shown according to an embodiment.

Fig. 6 is a control flow diagram of the circuit shown according to an embodiment.

Fig. 7 is a control flow diagram of the circuit shown according to an embodiment.

Fig. 8 is a block diagram illustrating an electronic device, according to an embodiment.

Detailed Description

Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the examples below do not represent all embodiments consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.

In the related art, two charging schemes are generally used for charging management of an electronic device having a plurality of rechargeable batteries: one of them is to adopt a plurality of charging chips to respectively charge and manage a plurality of rechargeable batteries, as shown in the schematic diagram of the charging circuit shown in fig. 1, two charging chips 41' are disposed in the charger 40', the two charging chips 41' are respectively connected in series with the first rechargeable battery 10' and the second rechargeable battery 11', one of the charging chips 41' is to charge and manage the first rechargeable battery 10', and the other charging chip 41' is to charge and manage the second rechargeable battery 11', so that each rechargeable battery is charged independently, and the maximum charging performance of each rechargeable battery can be exerted under the condition of ensuring safety, but the production cost of the electronic device is increased due to the addition of the charging chips. Secondly, a charging chip is used to perform charging management on multiple rechargeable batteries simultaneously, as shown in the schematic diagram of the charging circuit shown in fig. 2, a charging chip 41 'is disposed in the charger 40', the charging chip 41 'is connected in series with the battery pack including the first rechargeable battery 10' and the second rechargeable battery 11', and the first rechargeable battery 10' and the second rechargeable battery 11 'are connected in parallel, that is, the charging chip 41' performs charging management on the first rechargeable battery 10 'and the second rechargeable battery 11' simultaneously. Under the condition that the battery capacities of the first rechargeable battery 10 'and the second rechargeable battery 11' are different, the voltages of the first rechargeable battery 10 'and the second rechargeable battery 11' are different, after the product is reassembled or the battery is replaced, the rechargeable battery with high voltage charges the rechargeable battery with low voltage in the using or charging process of the electronic equipment, the charging current is uncontrolled, and if the voltage difference between the two rechargeable batteries is large to a certain extent, the charging current exceeds the specification requirement of the rechargeable battery, so that potential safety hazards are generated.

In order to solve the above technical problems, an embodiment of the present disclosure proposes a control circuit, which includes a switching unit and a control unit, wherein the switching unit is connected in series with a first rechargeable battery in a rechargeable battery pack connected in parallel. The control unit is connected with the switch unit and is configured to control the switch unit to be opened or closed according to whether the charging path of the first rechargeable battery reaches a preset conducting voltage so as to open or close the charging path of the first rechargeable battery. In the embodiment of the disclosure, a plurality of rechargeable batteries in the rechargeable battery pack are simultaneously charged and managed by adopting one charging chip, and a charging path where a first rechargeable battery in the rechargeable battery pack is located is controlled by setting a control circuit, so that under related battery scenes, the situation that charging current exceeds the specification requirement of a corresponding rechargeable battery in the process of charging other rechargeable batteries by the first rechargeable battery or in the process of charging the first rechargeable battery by other rechargeable batteries is avoided, and potential safety hazards are reduced. In addition, a plurality of rechargeable batteries in the battery pack can be assembled at will, and the production and assembly flow and the after-sales maintenance flow are simplified.

According to an embodiment of the present disclosure, as shown in fig. 3, the control circuit 100 of the present embodiment includes a switching unit 30 and a control unit 20, the switching unit 30 is connected in series with a first rechargeable battery 10 in a rechargeable battery pack including a plurality of rechargeable batteries connected in parallel, the present embodiment does not limit the number of rechargeable batteries in the rechargeable battery pack, and the rechargeable battery pack may include two rechargeable batteries, three rechargeable batteries, or more. As shown in fig. 3, the rechargeable battery pack includes a first rechargeable battery 10 and other rechargeable batteries 11, and the first rechargeable battery 10 and the other rechargeable batteries 11 are connected in parallel, wherein the other rechargeable batteries 11 may be one or a plurality of rechargeable batteries connected in parallel. The switching unit 30 of the present embodiment should be understood as any switching element, such as a transistor, capable of achieving circuit switching. In this embodiment, the first rechargeable battery 10 is a rechargeable battery connected to the control circuit 100, and the first rechargeable battery 10 may be any one of the rechargeable battery packs, and the first rechargeable battery 10 is not fixed, for example, after the plurality of rechargeable batteries in the rechargeable battery packs are reassembled or replaced in an after-sales scenario, the first rechargeable battery 10 may be replaced. The first rechargeable battery 10 may be selected from among rechargeable battery packs according to battery capacity, for example, a rechargeable battery having a larger or smaller battery capacity in the rechargeable battery pack may be used as the first rechargeable battery 10, and a rechargeable battery having a largest or smallest battery capacity in the rechargeable battery pack may be used as the first rechargeable battery 10.

The control unit 20 is connected to the switching unit 30, and is configured to control the switching unit 30 to be turned on or off according to whether the charging path 60 where the first rechargeable battery 10 is located reaches a preset on voltage, so as to turn on or off the charging path 60 where the first rechargeable battery 10 is located. The preset turn-on voltage is a voltage value capable of ensuring that the current does not exceed the corresponding battery specification requirement during the process of charging the first rechargeable battery 10 to the other rechargeable batteries 11 or during the process of charging the other rechargeable batteries 11 to the first rechargeable battery 10. When the switching unit 30 opens the charging path 60 where the first rechargeable battery 10 is located, the path between the switching unit 30 and the charging path 60 is turned on, and the charging chip 41 or the other rechargeable battery 11 charges the first rechargeable battery 10 through the charging path 60 or the first rechargeable battery 10 charges the other rechargeable battery 11 through the charging path 60. When the switching unit 30 closes the charging path 60 in which the first rechargeable battery 10 is located, the path between the switching unit 30 and the charging path 60 is opened, and the charging chip 41 or the other rechargeable battery 11 stops charging the first rechargeable battery 10 or the first rechargeable battery 10 stops charging the other rechargeable battery 11.

According to the embodiment, the charging channel where the first rechargeable battery is located is controlled to be opened and closed, so that under the condition of related batteries, the situation that current exceeds the specification requirements of the corresponding rechargeable battery is avoided in the process that the first rechargeable battery charges other rechargeable batteries or in the process that other rechargeable batteries charge the first rechargeable battery, and charging safety is guaranteed.

According to an embodiment of the present disclosure, as shown in fig. 3 and 4, the present embodiment includes all the features of the above embodiment, except that the control unit of the present embodiment includes a first voltage acquisition module 202 and a control module 201, the first voltage acquisition module 202 is configured to acquire an input voltage VIN of the switching unit 30 and an output voltage VOUT, the input voltage VIN being a voltage of one end of the switching unit 30 away from the first rechargeable battery 10, the output voltage VOUT being a voltage of one end of the switching unit 30 near the first rechargeable battery 10. In some embodiments, referring to fig. 3, the switching unit 30 is a triode, and the control unit 20 includes a third preset pin 23, a fourth preset pin 24, and a fifth preset pin 25; the third preset pin 23 is connected with the grid electrode of the triode to control the opening, closing and conducting states of the triode; the fourth preset pin 24 is connected to the source of the triode, and the fifth preset pin 25 is connected to the drain of the triode to obtain the input voltage VIN and the output voltage VOUT. The switching unit 30 of the present embodiment may be formed of one transistor or a plurality of transistors connected in parallel, and in one embodiment, as shown in fig. 3, the switching unit 30 of the present embodiment is formed of two transistors connected in parallel, wherein the gates of the two transistors are connected to the gate, the sources are connected to the source, and the drains are connected to the drain, so as to form the switching unit 30 capable of completely shutting off the charging path 60. In one embodiment, the transistor is an N-type transistor. The triode is used as a switch unit, so that the purpose of opening and closing a charging passage can be achieved, the current of the charging passage where the first rechargeable battery is located can be controlled by regulating and controlling the conduction degree of the triode, and potential safety hazards caused by the fact that the current of the charging passage is larger than the allowable maximum current are avoided.

The control module 201 is configured to determine whether the charging path 60 in which the first rechargeable battery 10 is located reaches a preset on voltage according to the input voltage VIN and the output voltage VOUT, and control the switching unit 30 to be turned on or off. The control switch unit 30 controls the switch unit 30 to open the charging path 60 when the charging path 60 reaches the preset on-voltage, and controls the switch unit 30 to close the charging path 60 when the charging path 60 does not reach the preset on-voltage, so as to ensure that the current does not exceed the specification requirements of the corresponding rechargeable battery in the process of charging the other rechargeable battery 11 by the first rechargeable battery 10 or in the process of charging the first rechargeable battery 10 by the other rechargeable battery 11.

According to the embodiment, whether the charging path of the first rechargeable battery reaches the preset conducting voltage or not is determined through monitoring the input voltage VIN and the output voltage VOUT of the switch unit, so that the switch unit is controlled to be turned on and off, and safety of the first rechargeable battery when the first rechargeable battery charges other rechargeable batteries and the other rechargeable batteries charge the first rechargeable battery is guaranteed.

According to an embodiment of the present disclosure, referring to fig. 3 and 4, the present embodiment includes all the features of the above embodiments, except that the control module of the present embodiment is configured to: when VIN > VOUT-V1, it is determined that the charging path 60 where the first rechargeable battery 10 is located reaches the preset on-voltage, and the switch unit 30 is controlled to be turned on. When VIN > VOUT-V1, current in the charging path 60 flows to the first rechargeable battery 10, and the first rechargeable battery 10 is in a charging state, and the control switch unit 30 is opened to enable current to flow. The charging state of the first rechargeable battery 10 may be achieved by charging the first rechargeable battery 10 with another rechargeable battery 11, or may be achieved by charging the first rechargeable battery 10 with the charging chip 41. When VIN is less than or equal to VOUT-V1, it is determined that the charging path 60 where the first rechargeable battery 10 is located does not reach the preset conducting voltage, and the switch unit is controlled to be turned off. When VIN is less than or equal to VOUT-V1, current in the charging path 60 flows out of the first rechargeable battery 10, the first rechargeable battery 10 is in a state of being charged to other rechargeable batteries 11, and at the moment, charging current may be larger than the maximum current allowed by the other rechargeable batteries 11, so that potential safety hazards exist. V1 is a voltage threshold value corresponding to a preset charging current threshold value of the other rechargeable batteries 11 in the rechargeable battery pack when the first rechargeable battery 10 is in a first preset state, and the first preset state is a state in which the first rechargeable battery 10 charges the other rechargeable batteries 11. In order to avoid that the charging current exceeds the specification requirements of other rechargeable batteries 11 when the first rechargeable battery 10 charges other rechargeable batteries 11, a corresponding voltage threshold V1 needs to be set according to the preset charging current threshold of other rechargeable batteries 11, so as to ensure the charging safety when the first rechargeable battery 10 charges other rechargeable batteries 11. The voltage threshold V1 in this embodiment may be either a positive value or a negative value, and the magnitude of V1 should be understood as an empirical value that may be set according to the battery attribute and/or the product requirement, or a voltage value that is calculated according to the attributes of a plurality of rechargeable batteries and/or the attributes of the control circuit. In one embodiment, the magnitude of V1 is related to the voltage difference between the first rechargeable battery 10 and the other rechargeable batteries 11, the resistance of all the rechargeable batteries, the line resistance of the control circuit, and the maximum current allowed by the other rechargeable batteries 11. In one embodiment, the differential pressure between the first rechargeable battery 10 and the other rechargeable battery 11 is set to Δv, the sum of the resistances of the first rechargeable battery 10, the other rechargeable battery 11, and the control circuit 100 is set to R, and the maximum current allowable by the other rechargeable battery 11 is set to I ₀, which satisfies the following conditions: deltaV/r > I ₀, deltaV=V1.

According to the embodiment, the input voltage VIN and the output voltage VOUT of the switch unit are compared, and a certain voltage threshold V1 is set, so that when the first rechargeable battery charges other rechargeable batteries, the situation that the charging current exceeds the specification requirements of the other rechargeable batteries is avoided, and the charging safety is guaranteed.

According to an embodiment of the present disclosure, as shown in fig. 3 and 4, the present embodiment includes all the features of the above embodiment, except that the control unit 20 of the present embodiment further includes a second voltage acquisition module 203, where the second voltage acquisition module 203 is configured to acquire a voltage value across a preset resistor 50 connected to the control unit 20, and in an implementation, referring to fig. 3, the preset resistor 50 includes a resistor R1 grounded through a first preset pin 21 of the control unit 20. The preset resistor 50 may be a constant resistor, may be formed by connecting a plurality of constant resistors in series or in parallel, or may be a resistor with an adjustable resistance. The control module 201 is configured to determine the maximum current of the charging path 60 in which the first rechargeable battery 10 is located according to the voltage value across the preset resistor 50 and the resistance value of the preset resistor 50. In the case of determining the resistance of the preset resistor 50, the current of the preset resistor 50 is equal to the voltage value obtained by the second voltage obtaining module 203 divided by the resistance of the preset resistor 50, and the current of the preset resistor 50 has a mapping relationship with the maximum current of the charging path 60, so that the maximum current of the charging path 60 can be determined according to the current of the preset resistor 50. After determining the maximum current of the charging path 60, the control module 201 further controls the switching unit 30 according to the maximum current.

In the embodiment, when the switch unit is turned on, the maximum current of the charging path where the first rechargeable battery is located is determined to further control the switch unit, so that charging safety of the first rechargeable battery in a charging state is ensured.

According to an embodiment of the present disclosure, as shown in fig. 3 and 4, the present embodiment includes all the features of the above embodiments, except that the control module 201 of the present embodiment is configured to control the on state of the switching unit 30 according to the maximum current of the charging path 60 in which the first rechargeable battery 10 is located. The switching unit 30 is connected in series with the first rechargeable battery 10, and the current of the switching unit 30 reflects the current magnitude of the charging path 60 where the first rechargeable battery 10 is located. The control module 201 also obtains the current flowing through the switching unit 30. In an embodiment, the control unit 20 further comprises a current acquisition module (not shown in the figure) configured to acquire the current flowing through the switching unit 30. In another example, the current flowing through the switching unit 30 is calculated by the input voltage VIN, the output voltage VOUT of the switching unit 30, and the impedance of the switching unit 30. The control module 201 is further configured to compare the magnitude of the current flowing through the switching unit 30 with the magnitude of the maximum current, and control the on state of the switching unit 30 according to the comparison result.

The on state of the switching unit 30 includes the degree of conduction of the switching unit 30, and the degree of conduction of the switching unit 30 may be increased or decreased, and when the degree of conduction of the switching unit 30 is increased, the current flowing through the switching unit 30 is increased, that is, the current in the charging path 60 is increased, whereas when the degree of conduction of the switching unit 30 is decreased, the current flowing through the switching unit 30 is decreased, that is, the current in the charging path 60 is decreased. In one example, the current flowing through the switching unit 30 is denoted by I, and the current corresponding to the preset resistor 50 is denoted by I (R1), where I (R1) is equal to or a multiple of the maximum current of the charging path 60. Taking the case that I (R1) is equal to the maximum current of the charging path 60 as an example, the control module 201 compares the magnitude of the current flowing through the switching unit 30 with the magnitude of I (R1), and increases the conduction degree of the switching unit 30 until the current I flowing through the switching unit 30 reaches the maximum current when I is less than or equal to I (R). At I > I (R1), the degree of conduction of the switching unit 30 is reduced to limit the magnitude of the current flowing through the switching unit 30 such that i=i (R1).

In the embodiment, the conduction state of the switch unit is regulated, so that the regulation and control of the current of the charging path are realized, and the potential safety hazard that the current in the charging path exceeds the maximum current for safe charging is avoided.

According to an embodiment of the present disclosure, as shown in fig. 3 and 4, the present embodiment includes all the features of the above embodiments, except that the control unit 20 of the present embodiment further includes a third voltage acquisition module 204, the third voltage acquisition module 204 being configured to acquire the ground voltage VDET of the first rechargeable battery 10; the control module 201 is configured to determine whether the charging path 60 in which the first rechargeable battery 10 is located is on according to the ground voltage VDET. When the charging path 60 is turned on, the ground voltage VDET of the first rechargeable battery 10 should be close to or equal to 0, and when the charging path 60 is not turned on, for example, when the first rechargeable battery 10 is removed, the ground voltage VDET of the first rechargeable battery 10 may be significantly increased. Therefore, the on state of the charging path 60 where the first rechargeable battery 10 is located can be determined by detecting the ground voltage VDET of the first rechargeable battery 10. In an embodiment, the control unit 20 includes a second preset pin 22, the second preset pin 22 is connected to the negative electrode of the first rechargeable battery 10, and the third voltage acquisition module 204 is configured to acquire the voltage of the second preset pin 22. The control module 201 is configured to determine whether the charging path 60 is turned on according to the ground voltage VDET, and to control the switching unit 30 to be turned on and off according to the conduction condition of the charging path 60. In some embodiments, the control module 201 is configured to determine that the charging path 60 where the first rechargeable battery 10 is located is not conductive, that is, the current cannot flow between the charging path 60 and the first rechargeable battery 10 when the ground voltage VDET is equal to or greater than V2, and control the switch unit 30 to close the charging path 60 where the first rechargeable battery 10 is located. When VDET < V2, it is determined that the charging path 60 where the first rechargeable battery 10 is located is conductive, that is, current may flow between the charging path 60 and the first rechargeable battery 10, and the switch unit 30 is controlled to open the charging path 60 where the first rechargeable battery 10 is located. V2 is an empirical value set according to the battery property of the first rechargeable battery 10, and V2 is a value greater than or equal to 0, in one embodiment v2=0v.

The embodiment opens or closes the charging path by judging whether the charging path of the first rechargeable battery is on or not, so as to avoid the condition of invalid operation of the whole control circuit.

According to one embodiment, as shown in fig. 3, the control unit 20 is further provided with a sixth preset pin 26, and the sixth preset pin 26 is grounded to ensure the safety of the control unit 20.

According to one embodiment, as shown in fig. 3, the present embodiment further proposes a charging circuit 200, and the charging circuit 200 of the present embodiment includes the control circuit 100 proposed in any one of the above embodiments. The charging circuit 200 of the present embodiment includes a charger 40 and a rechargeable battery pack including a plurality of rechargeable batteries connected in parallel, and the rechargeable battery pack is connected in series with the charger 40. The charger 40 is provided with a charging chip 41, and the charging chip 41 manages charging of a plurality of rechargeable batteries in a rechargeable battery pack. The control circuit 100 is connected to the first rechargeable battery 10 of the rechargeable battery pack, and the first rechargeable battery 10 may be any one of the rechargeable battery packs or may be selected from among the rechargeable battery packs according to the battery capacity.

The charging circuit of this embodiment has realized carrying out charge management to a plurality of rechargeable batteries simultaneously through a charging chip, has reduced manufacturing cost, simultaneously, through control circuit to the charging route that the first rechargeable battery that links to each other is located with it control, avoids in the group battery because the difference of the capacity of each rechargeable battery makes electronic equipment in charging or use, when other rechargeable batteries are charged to other rechargeable batteries or other rechargeable batteries charge to first rechargeable battery, the condition that charging current surpassed the specification requirement of corresponding rechargeable battery. Meanwhile, a plurality of rechargeable batteries in the battery pack can be assembled at will, so that the production and assembly processes and after-sales maintenance processes are simplified.

According to an embodiment, the present embodiment also proposes an electronic device including the charging circuit 200 proposed in the above embodiment. The electronic device of the embodiment may be a portable electronic device such as a mobile phone, a tablet computer, a notebook computer, or a wearable device. The electronic device of the embodiment of the disclosure is a mobile phone, and can be used as a non-folding screen mobile phone or a folding screen mobile phone, and when the electronic device is a folding screen mobile phone, the folding mode of the screen can be up-down folding or left-right folding. The electronic equipment of the embodiment can carry out charging management on all rechargeable batteries only by one charging chip, so that the production cost is reduced, meanwhile, the charging safety is ensured, in addition, a plurality of rechargeable batteries in the electronic equipment can be assembled at will, and the production assembly flow and the after-sales maintenance flow are simplified.

According to an embodiment, the present embodiment also proposes a control method of a circuit, the circuit of the present embodiment including a rechargeable battery pack and a switching unit for opening and closing a charging path in which a first rechargeable battery in the rechargeable battery pack is located. The control method of the embodiment comprises the following steps: and controlling the switch unit to be opened or closed according to whether the charging path of the first rechargeable battery reaches a preset on voltage or not so as to open or close the charging path of the first rechargeable battery. According to the embodiment, the charging channel where the first rechargeable battery is located is controlled to be opened and closed, so that under the condition of related batteries, the situation that current exceeds the specification requirements of the corresponding rechargeable battery is avoided in the process that the first rechargeable battery charges other rechargeable batteries or in the process that other rechargeable batteries charge the first rechargeable battery, and charging safety is guaranteed.

According to one embodiment, referring to the flowchart shown in fig. 5, the method of controlling the switch unit to open or close according to whether the charging path of the first rechargeable battery reaches the preset on-state voltage to open or close the charging path of the first rechargeable battery according to the present embodiment includes steps S11 to S12, wherein:

S11, the input voltage VIN and the output voltage VOUT of the switch unit are obtained.

In this embodiment, the input voltage VIN and the output voltage VOUT are obtained by the first voltage obtaining module, and whether the charging path of the first rechargeable battery reaches the preset conducting voltage can be determined according to the input voltage VIN and the output voltage VOUT.

S12, determining whether a charging path of the first rechargeable battery reaches a preset conducting voltage according to the input voltage VIN and the output voltage VOUT, and controlling the switch unit to be opened or closed.

In this embodiment, the input voltage VIN is a voltage of one end of the switch unit, which is far away from the first rechargeable battery, and the output voltage VOUT is a voltage of one end of the switch unit, which is near to the first rechargeable battery. After the input voltage VIN and the output voltage VOUT of the switching unit are obtained, it is determined whether the charging path of the first rechargeable battery reaches a preset on voltage, and the switching unit is controlled to be turned on or off. When the charging path reaches the preset conducting voltage, the condition that the current exceeds the corresponding battery specification requirement does not occur in the process of charging the first rechargeable battery to other rechargeable batteries or in the process of charging the first rechargeable battery to other rechargeable batteries, and the switch unit is controlled to open the charging path. When the charging path does not reach the preset conducting voltage, the risk that the charging current exceeds the specification requirement of the corresponding rechargeable battery occurs at the moment, and the switch unit is controlled to close the charging path.

In some embodiments, controlling the switching unit to be turned on or off according to the input voltage VIN and the output voltage VOUT includes: when VIN is larger than VOUT-V1, the control switch unit is turned on; when VIN is less than or equal to VOUT-V1, the control switch unit is turned off. And V1 is that the first rechargeable battery is in a first preset state, and the charging current exceeds a voltage threshold value corresponding to a preset charging current threshold value of other rechargeable batteries in the rechargeable battery pack, and the first preset state is that the first rechargeable battery charges the other rechargeable batteries. V1 may be an empirical value set according to battery properties or product requirements, and may be a voltage value calculated according to properties of a plurality of rechargeable batteries and properties of a control circuit. In one embodiment, the magnitude of V1 is related to the voltage difference between the first rechargeable battery and the other rechargeable batteries, the resistance of all the rechargeable batteries, the line resistance of the control circuit, and the maximum charging current allowed by the other rechargeable batteries.

According to an embodiment, referring to the flowchart shown in fig. 6, the control method of the present embodiment further includes steps S21 to S22, wherein:

S21, obtaining voltage values of two ends of a preset resistor connected with a control unit;

in this embodiment, the current of the preset resistor has a mapping relationship with the maximum current allowed by the charging path in which the first rechargeable battery is located, so that the maximum current of the charging path can be determined after determining the current of the preset resistor. The preset resistor can be a resistor, a plurality of resistors connected in series or in parallel, or a resistor with an adjustable resistance value.

S22, determining the maximum current of the charging path where the first rechargeable battery is located according to the voltage values of the two ends of the preset resistor and the resistance value of the preset resistor.

In this embodiment, after the voltage values at two ends of the preset resistor are obtained, the current of the preset resistor can be obtained by calculation according to the voltage value of the preset resistor and the resistance value of the preset resistor, the current of the preset resistor has a mapping relationship with the maximum current allowed by the charging path where the first rechargeable battery is located, the maximum current of the charging path can be determined after the current of the preset resistor is determined, and the conduction state of the switch unit is controlled according to the maximum current, so that the potential safety hazard that the current of the charging path exceeds the maximum current is avoided.

According to an embodiment, referring to the flowchart shown in fig. 6, the control method of the present embodiment further includes step S23, wherein:

s23, controlling the conduction state of the switch unit according to the maximum current of the charging path where the first rechargeable battery is located.

In this embodiment, the on state of the switch unit may be adjusted, and the on state of the switch unit reflects the magnitude of the current flowing through the switch unit and also reflects the magnitude of the current in the charging path in which the first rechargeable battery is located. The current flowing through the switching unit is maximized when the switching unit is fully turned on, and reduced when the degree of conduction of the switching unit is reduced. In an embodiment, the current of the preset resistor is set to be I (R1), the current flowing through the switch unit is set to be I, and the maximum current flowing through the switch unit has a mapping relationship with the current I (R1) of the preset resistor. In one example, when the maximum current flowing through the switching unit is equal to the current I (R1) of the preset resistor, the conduction degree of the switching unit is increased until the current I flowing through the switching unit reaches the maximum current I (R1) when I is less than or equal to I (R). When I > I (R1), the conduction degree of the switch unit is reduced, and the current flowing through the switch unit is limited by adjusting the conduction degree of the switch unit until the current I flowing through the switch unit is the maximum current I (R1).

According to the embodiment, the conduction state of the switch unit is regulated and controlled according to the maximum current of the charging passage where the first rechargeable battery is located, so that the situation that the current of the charging passage where the first rechargeable battery is located is larger than the maximum current allowed by the first rechargeable battery is avoided, and charging safety is guaranteed.

According to an embodiment, referring to the flowchart shown in fig. 7, the control method of the present embodiment further includes steps S31 to S32, wherein:

S31, acquiring a ground voltage VDET of the first rechargeable battery;

In this embodiment, the third voltage acquisition module is used to acquire the ground voltage VDET of the first rechargeable battery, so as to determine whether the charging path of the first battery is turned on according to the ground voltage VDET of the first rechargeable battery.

S32, determining whether a charging path where the first rechargeable battery is located is conducted according to the ground voltage VDET.

In this embodiment, when the charging path of the first rechargeable battery is turned on and the first rechargeable battery is correctly connected to the charging path of the first rechargeable battery, the ground voltage of the first rechargeable battery is close to or equal to 0. When the charging path of the first rechargeable battery is not conductive, for example, when the first rechargeable battery is removed, the ground voltage of the first rechargeable battery may be significantly increased. Therefore, whether the charging path of the first rechargeable battery is conducted or not can be determined by detecting the ground voltage of the first rechargeable battery, and then the switch unit is controlled to be opened and closed according to the conduction condition of the charging path. In one embodiment, when the ground voltage VDET is greater than or equal to V2, it is determined that the charging path of the first rechargeable battery is not conductive, that is, current cannot flow between the charging path and the first rechargeable battery, and the control switch unit is turned off to close the charging path of the first rechargeable battery. When VDET is smaller than V2, the charging passage where the first rechargeable battery is located is determined to be conducted, namely current can flow between the charging passage and the first rechargeable battery, and the switch unit is controlled to be opened so as to open the charging passage where the first rechargeable battery is located. V2 is an empirical value set according to the battery property of the first rechargeable battery, and V2 is a value of 0 or more. The embodiment opens or closes the charging path by judging whether the charging path is on or not, so as to avoid the invalid operation of the whole control circuit.

In the embodiment, on the premise that one charging chip is adopted to simultaneously charge and manage a plurality of rechargeable batteries in the rechargeable battery pack, a control circuit is arranged to control a charging path of any one rechargeable battery in the rechargeable battery pack, so that under the condition of related batteries, the situation that current exceeds the specification requirement of the corresponding rechargeable battery in the process of charging other rechargeable batteries or in the process of charging the rechargeable battery by the other rechargeable batteries is avoided, and potential safety hazards are reduced; in addition, a plurality of rechargeable batteries in the battery pack can be assembled at will, and the production and assembly flow and the after-sales maintenance flow are simplified.

Fig. 8 is a block diagram of an electronic device 1000, shown in accordance with an embodiment. For example, electronic device 1000 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, exercise device, personal digital assistant, or the like.

Referring to fig. 8, an electronic device 1000 may include one or more of the following components: a processing component 1002, a memory 1004, a power component 1006, a multimedia component 1008, an audio component 1010, an input/output (I/O) interface 1012, a sensor component 1014, and a communication component 1016.

The processing component 1002 generally controls overall operation of the electronic device 1000, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 1002 can include one or more processors 1020 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 1002 can include one or more modules that facilitate interaction between the processing component 1002 and other components. For example, the processing component 1002 can include a multimedia module to facilitate interaction between the multimedia component 1008 and the processing component 1002.

The memory 1004 is configured to store various types of data to support operations at the device 1000. Examples of such data include instructions for any application or method operating on the electronic device 1000, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 1004 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

The power component 1006 provides power to the various components of the electronic device 1000. Power component 1006 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for electronic device 1000.

The multimedia component 1008 includes a screen between the electronic device 1000 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia assembly 1008 includes a front-facing camera and/or a rear-facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 1000 is in an operational mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 1010 is configured to output and/or input audio signals. For example, the audio component 1010 includes a Microphone (MIC) configured to receive external audio signals when the electronic device 1000 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in memory 1004 or transmitted via communication component 1016. In some embodiments, the audio component 1010 further comprises a speaker for outputting audio signals.

The I/O interface 1012 provides an interface between the processing assembly 1002 and peripheral interface modules, which may be a keyboard, click wheel, buttons, and the like. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 1014 includes one or more sensors for providing status assessment of various aspects of the electronic device 1000. For example, the sensor assembly 1014 may detect an on/off state of the device 1000, a relative positioning of components such as a display and keypad of the electronic device 1000, the sensor assembly 1014 may also detect a change in position of the electronic device 1000 or a component of the electronic device 1000, the presence or absence of a user's contact with the electronic device 1000, an orientation or acceleration/deceleration of the electronic device 1000, and a change in temperature of the electronic device 1000. The sensor assembly 1014 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. The sensor assembly 1014 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1014 can also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 1016 is configured to facilitate communication between the electronic device 1000 and other devices, either wired or wireless. The electronic device 1000 may access a wireless network based on a communication standard, such as WiFi,2G, or 3G, or a combination thereof. In one embodiment, the communication component 1016 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one embodiment, the communication component 1016 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an embodiment, electronic device 1000 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.

In an embodiment, a non-transitory computer-readable storage medium is also provided, such as memory 1004, including instructions executable by processor 1020 of electronic device 1000 to perform the above-described method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

A non-transitory computer readable storage medium, which when executed by a processor of a processing apparatus of video data, enables the processing apparatus of video data to perform the processing method of video data provided by the embodiments of the present disclosure.

Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A control circuit, comprising:

2. The control circuit according to claim 1, wherein the control unit includes:

3. The control circuit of claim 2, wherein the control module is configured to:

4. The control circuit of claim 2, wherein the control unit further comprises:

5. The control circuit of claim 4, wherein the predetermined resistance comprises a resistance that is grounded through a first predetermined pin of the control unit.

6. The control circuit of claim 4, wherein the control module is configured to:

7. The control circuit of claim 2, wherein the control unit further comprises:

The control module is configured to determine whether a charging path in which the first rechargeable battery is located is on or not according to the ground voltage VDET.

8. The control circuit of claim 7, wherein the control module is configured to determine that a charging path in which the first rechargeable battery is located is not conductive when the ground voltage VDET is greater than or equal to V2, and control the switching unit to close the charging path in which the first rechargeable battery is located; wherein V2 is more than or equal to 0.

9. The control circuit of claim 7, wherein the control unit includes a second preset pin connected to a negative electrode of the first rechargeable battery;

10. The control circuit of claim 2, wherein the switching unit is a transistor; the control unit comprises a third preset pin, a fourth preset pin and a fifth preset pin;

11. A charging circuit, comprising:

A charger;

the control circuit is connected with a first rechargeable battery in the rechargeable battery pack; the control circuit is the control circuit of any one of claims 1-10;

12. An electronic device comprising the charging circuit of claim 11.

13. The control method of the circuit is characterized in that the circuit comprises a rechargeable battery pack and a switch unit, wherein the switch unit is used for opening and closing a charging passage where a first rechargeable battery in the rechargeable battery pack is located; the control method comprises the following steps:

14. The method according to claim 13, wherein the controlling the switching unit to be turned on or off according to whether the charging path of the first rechargeable battery reaches a preset turn-on voltage, to turn on or off the charging path of the first rechargeable battery, comprises:

Acquiring an input voltage VIN and an output voltage VOUT of the switch unit;

15. The method according to claim 14, wherein determining whether a charging path of the first rechargeable battery reaches a preset turn-on voltage according to the input voltage VIN and the output voltage VOUT, and controlling the switching unit to be turned on or off, comprises:

16. The control method of the circuit according to claim 13, characterized in that the control method further comprises:

17. The control method of the circuit according to claim 16, characterized in that the control method further comprises:

18. The control method of the circuit according to claim 13, characterized in that the control method further comprises:

acquiring a ground voltage VDET of the first rechargeable battery;

19. The method of claim 18, wherein determining whether the charging path in which the first rechargeable battery is located is conductive according to the ground voltage VDET comprises:

20. A non-transitory computer readable storage medium, wherein instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the control method of any one of claims 13-19.