CN114123362A

CN114123362A - Electronic device and charge-discharge control method

Info

Publication number: CN114123362A
Application number: CN202010872797.XA
Authority: CN
Inventors: 段勇
Original assignee: Oppo Chongqing Intelligent Technology Co Ltd
Current assignee: Oppo Chongqing Intelligent Technology Co Ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2022-03-01

Abstract

The disclosure provides electronic equipment and a charge-discharge control method, and relates to the technical field of charging. The electronic device includes: a charging interface; at least two battery cells connected in series; the at least two voltage conversion modules are correspondingly connected with the battery units respectively; each battery unit is connected with the charging interface through a voltage conversion module correspondingly connected with the battery unit; the voltage conversion modules are respectively used for converting the first output voltage and/or the first output current provided by the charging interface into the charging voltage and/or the charging current required by the correspondingly connected battery unit. The electronic equipment and the charge-discharge control method can solve the problem that in the related technology, a voltage equalization technology is additionally used due to the fact that the capacity and the internal resistance of the batteries connected in series are not consistent.

Description

Electronic device and charge-discharge control method

Technical Field

The present disclosure relates to the field of charging technologies, and in particular, to an electronic device and a charging and discharging control method.

Background

Electronic devices (such as smart phones, mobile terminals or smart devices) are increasingly popular with consumers, but the electronic devices consume much power and need to be charged frequently, while charging the electronic devices by using a low-power common charging scheme usually takes several hours.

In a battery architecture with two cells connected in series, the currents flowing through the two cells are the same no matter the two cells are charged or discharged, but the internal resistances of the two cells have some differences, and balancing is indispensable, otherwise, the two cells cannot be completely filled during charging. The current equalization scheme generally processes cells by strictly controlling the cells, such as K value, pressure difference between cells, and the like.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure is directed to an electronic device and a charge and discharge control method, which at least partially overcome the problem in the related art that additional voltage equalization is required due to inconsistent capacity and internal resistance between series-connected batteries.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows, or in part will be obvious from the description, or may be learned by practice of the disclosure.

According to an aspect of the present disclosure, there is provided an electronic device including: a charging interface; at least two battery cells connected in series; the at least two voltage conversion modules are correspondingly connected with the battery units respectively; each battery unit is connected with the charging interface through a voltage conversion module correspondingly connected with the battery unit; the voltage conversion modules are respectively used for converting the first output voltage and/or the first output current provided by the charging interface into the charging voltage and/or the charging current required by the correspondingly connected battery unit.

According to an embodiment of the present disclosure, each voltage conversion module is further configured to determine a voltage conversion mode when the corresponding connected battery unit is charged according to the first output voltage, the current voltage of the corresponding connected battery unit, and the first voltage threshold.

According to an embodiment of the present disclosure, each voltage conversion module includes: a comparator; each comparator is used for comparing whether the difference value between the first output voltage and the current voltage of the corresponding connected battery unit is greater than a first voltage threshold value or not; when the difference value between the first output voltage and the current voltage of the correspondingly connected battery unit is larger than a first voltage threshold value, determining that the voltage conversion mode when the corresponding voltage conversion module charges the correspondingly connected battery unit is voltage reduction; and when the difference value between the first output voltage and the current voltage of the correspondingly connected battery unit is smaller than or equal to the first voltage threshold value, determining that the voltage conversion mode when the corresponding voltage conversion module charges the correspondingly connected battery unit is boosting.

According to an embodiment of the present disclosure, the electronic device further includes: at least two switch units respectively and correspondingly connected between the charging interface and each voltage conversion module; each voltage conversion module is also used for controlling the on/off of the corresponding connected switch unit according to the current voltage of the corresponding connected battery unit.

According to an embodiment of the present disclosure, the electronic device further includes: the power supply circuit to be supplied is respectively connected with each voltage conversion module; and the voltage conversion modules are also used for converting the second output voltage and/or the second output current provided by the correspondingly connected battery units into the power supply voltage and/or the power supply current required by the circuit to be powered.

According to an embodiment of the present disclosure, each voltage conversion module is further configured to determine, according to the current voltage of the corresponding connected battery unit and the second voltage threshold, a voltage conversion mode when the power supply circuit is powered.

According to an embodiment of the present disclosure, each voltage conversion module is further configured to determine whether a current voltage of the corresponding connected battery unit is greater than a second voltage threshold; when the current voltage of the corresponding connected battery unit is larger than a second voltage threshold value, determining that the voltage conversion mode when the circuit to be powered supplies power is voltage reduction; and when the current voltage of the corresponding connected battery unit is less than or equal to the second voltage threshold, determining that the voltage conversion mode when the circuit to be powered supplies power is boosting.

According to an embodiment of the present disclosure, the electronic device further includes: and the control module is connected with each battery unit, each voltage conversion module and the charging interface and is used for respectively determining the voltage conversion mode when each voltage conversion module charges the corresponding connected battery unit according to the first output voltage, the current voltage of each battery unit and the first voltage threshold.

According to an embodiment of the present disclosure, the electronic device further includes: the power supply circuit to be supplied is respectively connected with each voltage conversion module; the control module is further used for respectively determining a voltage conversion mode when the correspondingly connected voltage conversion module supplies power to the circuit to be powered according to the current voltage of each battery unit and the second voltage threshold.

According to another aspect of the present disclosure, there is provided a charging and discharging control method applied to an electronic device, including: the first output voltage and/or the first output current provided by the charging interface of the electronic equipment are converted into the charging voltage and/or the charging current required by the battery unit correspondingly connected with each voltage conversion module through at least two voltage conversion modules in the electronic equipment respectively.

According to an embodiment of the present disclosure, the charge and discharge control method further includes: and respectively determining the voltage conversion mode of each voltage conversion module when the corresponding connected battery unit is charged according to the first output voltage, the current voltage of each battery unit and the first voltage threshold.

According to an embodiment of the present disclosure, determining a voltage conversion mode when each voltage conversion module charges a corresponding connected battery cell according to a first output voltage, a current voltage of each battery cell, and a first voltage threshold includes: comparing whether the difference value between the first output voltage and the current voltage of each battery unit is greater than a first voltage threshold value; when the difference value between the first output voltage and the current voltage of the battery unit is larger than a first voltage threshold value, determining that the voltage conversion mode when the voltage conversion module correspondingly connected with the battery unit charges the battery unit is voltage reduction; and when the difference value between the first output voltage and the current voltage of the battery unit is smaller than or equal to a first voltage threshold value, determining that the voltage conversion mode when the voltage conversion module correspondingly connected with the battery unit charges the battery unit is boosting.

According to an embodiment of the present disclosure, the charge and discharge control method further includes: respectively controlling the on or off of at least two switch units in the electronic equipment according to the current voltage of each battery unit; and each switch unit is correspondingly connected between the charging interface and each voltage conversion module.

According to an embodiment of the present disclosure, the charge and discharge control method further includes: and converting the second output voltage and/or the second output current provided by the correspondingly connected battery unit into a power supply voltage and/or a power supply current required by a circuit to be powered in the electronic equipment through each voltage conversion module.

According to an embodiment of the present disclosure, the charge and discharge control method further includes: and respectively determining the voltage conversion mode when the correspondingly connected voltage conversion module supplies power to the circuit to be powered according to the current voltage of each battery unit and the second voltage threshold.

According to an embodiment of the present disclosure, determining, according to the current voltage and the second voltage threshold of each battery unit, a voltage conversion mode when the correspondingly connected voltage conversion module supplies power to the circuit to be powered, respectively, includes: respectively determining whether the current voltage of each battery unit is greater than a second voltage threshold value; when the current voltage of the battery unit is greater than the second voltage threshold value, determining that the voltage conversion mode when the voltage conversion module correspondingly connected with the battery unit supplies power for the circuit to be powered is voltage reduction; and when the current voltage of the battery unit is less than or equal to the second voltage threshold, determining that the voltage conversion mode is boosting when the voltage conversion module correspondingly connected with the battery unit supplies power to the circuit to be powered.

According to the electronic device provided by the embodiment of the disclosure, each voltage conversion module is arranged for each battery unit, and each voltage conversion module converts the output voltage and/or the output current provided by the charging interface into the charging voltage and/or the charging current required by the battery unit correspondingly connected with the voltage conversion module, so that each battery unit can be independently charged, the capacity and the internal resistance of each battery unit are not required to be strictly consistent, and an additional equalization scheme is not required. Even in the case where each battery cell has different parameters, each battery cell can be fully charged, achieving maximum utilization of the battery capacity.

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 present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 is a schematic diagram of a charging system shown according to an example.

Fig. 2 is a schematic structural diagram of an electronic device according to an exemplary embodiment.

Fig. 3 is a schematic structural diagram of another electronic device shown in accordance with an example embodiment.

Fig. 4 is a schematic structural diagram of another electronic device provided according to an exemplary embodiment.

Fig. 5 is a schematic structural diagram of another electronic device provided according to an exemplary embodiment.

Fig. 6 is a schematic structural diagram of another electronic device provided according to an exemplary embodiment.

Fig. 7 is a schematic structural diagram of another electronic device provided according to an exemplary embodiment.

Fig. 8 is a schematic structural diagram of another electronic device provided according to an exemplary embodiment.

Fig. 9 is a flowchart of a charging and discharging control method according to an exemplary embodiment.

Fig. 10 is a flowchart of another charge and discharge control method provided according to an example embodiment.

Fig. 11 is a flowchart of yet another charge and discharge control method according to an example embodiment.

Fig. 12 is a flowchart of yet another charge and discharge control method according to an example embodiment.

Fig. 13 is a flowchart of yet another charge and discharge control method provided in accordance with an exemplary embodiment.

Fig. 14 is a flowchart of yet another charge and discharge control method according to an example embodiment.

Fig. 15 is a flowchart of yet another charge and discharge control method according to an example embodiment.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.

In the present disclosure, unless expressly stated or limited otherwise, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral part; can be mechanically connected, electrically connected or can communicate with each other; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, in the description of the present disclosure, "and/or" describes an association relationship of the associated object, indicating that three relationships, for example, a and/or B, may exist, and indicating that three cases, a exists alone, B exists alone, and a and B exist simultaneously. The symbol "/" generally indicates that the former and latter associated objects are in an "or" relationship. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Hereinafter, the electronic device and the charging control method in the exemplary embodiment of the present disclosure will be described in more detail with reference to the drawings and the embodiment.

Referring to fig. 1, the charging system 100 includes: a power supply device 110 and an electronic apparatus 120.

The Power supply device 110 is, for example, a Power adapter, a Power Bank (Power Bank), or the like.

The power supply device 110 and the electronic device 120 respectively include: charging interface 111 and charging interface 121.

The power supply device 110 is connected to the electronic device 120 through a cable, a charging interface 111 and a charging interface 121, and provides power for the electronic device 120 to charge a battery in the electronic device 120.

The charging interface 121 may be, for example, a USB interface satisfying USB (Universal Serial Bus) 2.0 specification, USB3.0 specification, or USB3.1 specification, and includes: micro USB interface or USB TYPE-C interface, etc. In some embodiments, the charging interface 121 may also be a Lightning interface, or any other type of parallel or serial interface capable of being used for charging.

Accordingly, the charging interface 111 may be a male connector of a USB interface or a Lightning interface adapted to the charging interface 121 and meeting the USB 2.0 specification, the USB3.0 specification, or the USB3.1 specification.

When the electronic device 120 is charged by the power supply apparatus 110, it may request the power supply apparatus 110 for the required charging voltage and/or charging current to meet the charging requirement through communication with the power supply apparatus 110.

For example, the power supply device 110 can communicate with the electronic device 120 through the charging interface 111 and the charging interface 121, and both of them do not need to be provided with an additional communication interface or other wireless communication modules. If the charging interface 111 and the charging interface 121 are USB interfaces, the power supply apparatus 110 and the electronic device 120 may communicate based on data lines (e.g., D + and/or D-lines) in the USB interfaces. If the charging interface 111 and the charging interface 121 are USB interfaces (such as USB TYPE-C interfaces) supporting a Power Delivery (PD) communication protocol, the Power supply apparatus 110 and the electronic device 120 may communicate based on the PD communication protocol. Further, the power supply apparatus 110 and the electronic device 120 may communicate by other communication methods than the charging interface 111 and the charging interface 121. For example, the power supply device 110 and the electronic device 120 communicate wirelessly, such as Near Field Communication (NFC).

It should be noted that fig. 1 is only a schematic diagram of a charging system shown according to an example, and is intended to illustrate an application scenario of an electronic device and a charging and discharging control method provided by the embodiments of the present disclosure, and not to limit the present disclosure.

The electronic device 200 may be, for example, a terminal, and the terminal may be a mobile terminal such as a mobile phone, a game console, a tablet computer, an electronic book reader, an intelligent wearable device, an MP4(moving picture Experts Group Audio Layer IV, motion picture Experts compression standard Audio Layer 4) player, an intelligent home device, an AR (Augmented Reality) device, and a VR (Virtual Reality) device; or rechargeable devices with charging function such as mobile power supplies (such as a charger and a travel charger), electronic cigarettes, wireless mice, wireless keyboards, wireless earphones, Bluetooth sound boxes and the like; alternatively, it may be a Personal Computer (PC), such as a laptop portable Computer and a desktop Computer.

Referring to fig. 2, the electronic device 200 includes: the battery charging system comprises a charging interface 210, at least two battery units 220 connected in series and at least two voltage conversion modules 230.

For example, the charging interface 210 may be a USB interface that meets USB 2.0 specification, USB3.0 specification, or USB3.1 specification, and includes: micro USB interface or USB TYPE-C interface, etc. In some embodiments, the charging interface 121 may also be a lightning interface, or any other type of parallel interface or serial interface capable of being used for charging.

The electronic device 200 is connected to a power supply device 110 such as that in fig. 1 through a charging interface 210 to charge at least two battery cells 220.

It should be noted that fig. 2 only shows two

battery units

220A and 220B for exemplary purposes, but it is not intended to limit the number of battery units in the electronic device 200 provided by the embodiment of the present disclosure. For example, fig. 3 shows a schematic structural diagram of another electronic device shown according to an example embodiment. As shown in fig. 3, the electronic device 300 may further include three

battery units

220A, 220B, and 320C, and correspondingly three voltage conversion modules 230A, 230B, and 330C.

The

battery units

220A and 220B may be batteries including a single battery cell, or may be batteries including a plurality of battery cells, for example, a plurality of battery cells are connected in series, and the disclosure is not limited thereto.

The voltage conversion modules 230A and 230B are respectively connected to the

battery units

220A and 220B, for example, the voltage conversion module 230A is connected between the battery unit 220A and the charging interface 210, and the voltage conversion module 230B is connected between the battery unit 220B and the charging interface 210. Likewise, the number of voltage conversion modules 230 shown in fig. 2 is merely an example, and not a limitation of the present disclosure. For example, as shown in fig. 3, when there are three battery cells 220, there are three voltage conversion modules 230 accordingly.

Referring to fig. 2 and 3, each voltage conversion module 230 is configured to convert the output voltage and/or the output current provided by the charging interface 210 into the charging voltage and/or the charging current required by the battery unit 230 connected to the corresponding voltage conversion module.

Furthermore, each battery unit 230 may be disposed in each available space of the electronic device. Especially for the electronic device using the PCBA (Printed Circuit Board Assembly) motherboard, the available area on the motherboard is more and more narrow, and each battery unit 230 can be placed at any available position on the motherboard without occupying a larger area of the motherboard. Therefore, the cruising ability of the electronic equipment is ensured, and the reasonable utilization of the use area of the mainboard is also ensured.

With continued reference to fig. 2 and fig. 3, each voltage conversion module 230 may further determine, according to the output voltage of the charging interface 210, the current voltage of the corresponding connected battery cell 220, and the preset voltage threshold VH1, that the voltage conversion mode when the corresponding connected battery cell 220 is charged is the step-up mode or the step-down mode.

The voltage conversion module 230 may be implemented, for example, as a Buck-Boost Buck circuit. Each voltage conversion module 230 may determine, for example, through a control unit built in the Buck-Boost voltage step-up/step-down circuit, whether the voltage conversion mode is a step-up mode or a step-down mode when the corresponding connected battery cell 220 is charged. For example, when boosting, the voltage boosting is realized through a Boost circuit; when the voltage is reduced, the voltage is reduced through a Buck circuit.

Alternatively, the voltage conversion module 230 may also be implemented as a charge pump (charge pump) circuit. The step-up function or the step-down function can be realized by configuring the conversion ratio of the charge pump.

Fig. 4 is a schematic structural diagram of another electronic device according to an exemplary embodiment.

Also taking two

battery cells

220A and 220B connected in series as an example, as shown in fig. 4, a comparator circuit 431 is built in each voltage conversion module 430. Each of the comparison circuits 431 is configured to compare whether a difference between the output voltage provided by the charging interface 210 and the current voltage of the corresponding connected battery cell 220 (for example, the comparison circuit 431A compares a difference Uo-U1A between the output voltage Uo provided by the charging interface 210 and the current voltage U1A of the battery cell 220A) is greater than the voltage threshold VH 1. If the difference (e.g., Uo-U1A) is greater than the voltage threshold VH1, the voltage conversion mode when the associated voltage conversion module 430 (e.g., voltage conversion module 430A) charges the corresponding connected battery cell 220 (e.g., battery cell 220A) is determined to be step-down. Otherwise, it is determined that the voltage conversion mode when the belonging voltage conversion module 430 (e.g., the voltage conversion module 430A) is determined to charge the corresponding connected battery cell 220 (e.g., the battery cell 220A) is boosting. That is, when the current voltage of the battery unit is small, the charging voltage provided for the battery unit can be properly reduced; when the current voltage of the battery unit is larger, the charging voltage provided for the battery unit can be properly increased. The comparison circuit 431 can be implemented, for example, as a voltage comparator. By arranging the comparison circuit, the voltage difference can be conveniently and quickly compared with the voltage threshold. Thus, according to the comparison result, the voltage conversion mode of the voltage conversion module 430 at the time of charging can be quickly determined.

Fig. 5 is a schematic structural diagram of another electronic device according to an exemplary embodiment.

Also taking the example of two

battery cells

220A and 220B connected in series, as shown in fig. 5, a protective plate 540 for the battery cell 220 is provided between each voltage conversion module 230 and each battery cell 220. The protection plate 540 may be, for example, an integrated circuit board that protects the battery unit 220 to prevent overcharge, overdischarge, overcurrent, short circuit, and ultrahigh temperature charging and discharging of the battery unit 220.

Fig. 6 is a schematic structural diagram of another electronic device according to an exemplary embodiment.

Still taking two

battery cells

220A and 220B connected in series as an example, as shown in fig. 6, the electronic device 600 may further include: at least two switch units 650 are correspondingly connected between the charging interface 210 and each voltage conversion module 230. For example, as shown in the figure, the switch unit 650A is connected between the charging interface 210 and the voltage conversion module 230A, and the switch unit 650B is connected between the charging interface 210 and the voltage conversion module 230B.

Each voltage conversion module 230 controls the switch 650 to be turned on or off according to the current voltage of the corresponding battery cell 220. Taking the battery cell 220A as an example, when the battery cell 220A is fully charged in advance, the voltage conversion module 230A may control the switch unit 650A to turn off to stop charging the battery cell 220A. Alternatively, if the battery unit 220A fails, the voltage conversion module 230A may also stop charging the battery unit 220A by controlling the switch unit 650A to turn off.

The switching unit 650 may be implemented as a MOS transistor, for example.

Fig. 7 is a schematic structural diagram of another electronic device according to an exemplary embodiment.

Still taking two

battery units

220A and 220B connected in series as an example, as shown in fig. 7, the electronic device 700 further includes a circuit to be powered 760 connected to each voltage conversion module 230. Each voltage conversion module 230 is configured to convert the output voltage and/or the output current provided by the corresponding connected battery unit 220 into a supply voltage and/or a supply current required by the circuit 700 to be powered.

The circuit to be powered 760 may include, for example, a CPU, a GPU, an LED backlight module, and the like in the electronic device, but the disclosure is not limited thereto.

Furthermore, each voltage conversion module 230 may also determine that the voltage conversion mode when supplying power to the circuit to be charged 250 is voltage boosting or voltage dropping according to the current voltage of each correspondingly connected battery cell 220 and the voltage threshold VH 2.

For example, each voltage conversion module 230 determines whether the current voltage of the corresponding connected battery cell 220 is greater than a voltage threshold VH2, respectively. If the current voltage of the corresponding connected battery unit 220 is greater than the voltage threshold VH2, determining that the voltage conversion mode when the voltage conversion module 230 supplies power to the circuit to be powered 250 is step-down; otherwise, it is determined that the voltage conversion mode when the voltage conversion module 230 supplies power to the circuit to be powered 250 is boosting.

Generally, the electronic device is automatically powered off when the current voltage of the battery unit 220 is lower than 3.4V. In practice, in the case of a lithium battery, the over-discharge voltage of the battery is generally 2.6V, so that the battery capacity of the battery unit between 2.6V and 3.4V is not utilized, thereby reducing the endurance of the electronic device.

When the voltage of the battery unit 220 is lower than 3.4V, the voltage of the battery unit 220 can be boosted by the correspondingly connected voltage conversion module 230, so that the electric quantity in the battery unit 220 can be reasonably utilized.

In addition, when the voltage conversion modules 230 simultaneously supply power to the circuit to be powered in a parallel manner, the voltage conversion modules 230 may also ensure that the voltages output to the circuit 250 to be powered are consistent by converting the voltages of the correspondingly connected battery units 220.

The above embodiments give an example explanation of the control of the voltage conversion mode at the time of charge/discharge and/or the control of the above switching unit using the control module inside each voltage conversion module 230. In addition, the control module may be arranged inside the electronic device to uniformly control the voltage conversion mode of each voltage conversion module 230 during charging/discharging and/or control the on/off of the switch unit.

Fig. 8 is a schematic structural diagram of another electronic device according to an exemplary embodiment.

Still taking two

battery cells

220A and 220B connected in series as an example, as shown in fig. 8, the electronic device 800 may further include: a control module 870.

The Control module 870 may be implemented, for example, by a separate Micro Control Unit (MCU), or may also be implemented by an Application Processor (AP) inside the electronic device 800.

Control module 870 is connected to each battery cell 220, each voltage conversion module 230, and charging interface 210. The voltage conversion mode of each voltage conversion module 230 for charging the corresponding connected battery cell 220 is determined to be either boosting or stepping down according to the magnitude of the output voltage provided by the charging interface 210, the current voltage of each battery cell 220, and the voltage threshold VH 1.

For example, control module 870 compares the difference between the output voltage provided by charging interface 210 and the current voltage of each battery cell 220 to determine whether the difference is greater than voltage threshold VH 1. When the difference between the output voltage provided by the charging interface 210 and the current voltage of a certain battery cell 220 (for example, the battery cell 220A) is greater than the voltage threshold VH1, it is determined that the voltage conversion mode when the voltage conversion module 230A connected corresponding to the battery cell 220A charges the battery cell 220A is step-down. When the difference between the output voltage provided by the charging interface 210 and the current voltage of a certain battery cell 220 (for example, the battery cell 220B) is less than or equal to the voltage threshold VH1, the voltage conversion mode when the voltage conversion module 230B connected corresponding to the battery cell 220B charges the battery cell 220B is determined to be boosting.

The control module 870 may also control the corresponding switch units 650 to be turned on or off according to the current voltage of each battery unit 220. Still taking the battery unit 220A as an example, when the battery unit 220A is fully charged in advance, the control module 870 may control the switch unit 650A to turn off to stop charging the battery unit 220A. Alternatively, if the battery unit 220A fails, the control module 870 may also stop charging the battery unit 220A by controlling the switch unit 650A to turn off.

In addition, the control module 870 may further determine whether the voltage conversion mode of each correspondingly connected voltage conversion module 230 is the voltage boosting mode or the voltage reducing mode when the to-be-powered circuit 760 is set according to the current voltage of each battery cell 220 and the voltage threshold VH 2.

For example, control module 870 determines whether the current voltage of each battery cell 220 is greater than voltage threshold VH2, respectively. If the current voltage of a certain battery cell 220 (for example, the battery cell 220A) is greater than the voltage threshold VH2, determining that the voltage conversion mode when the correspondingly connected voltage conversion module 230A supplies power to the circuit to be powered 250 is step-down; otherwise, it is determined that the voltage conversion mode when the voltage conversion module 230A supplies power to the circuit to be powered 250 is boosting.

Likewise, when the voltage of the battery unit 220 is lower than 3.4V, the battery unit 220 may be boosted by the correspondingly connected voltage conversion module 230, so that the amount of electricity in the battery unit 220 is reasonably utilized.

It is noted that the block diagrams shown in the above figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.

The following are embodiments of the method of the present disclosure, which may be applied to the above-described embodiments of the apparatus of the present disclosure. For details not disclosed in the embodiments of the disclosed method, refer to the embodiments of the disclosed apparatus.

Fig. 9 shows a flowchart of a charging and discharging control method according to an exemplary embodiment. The charge/discharge control method may be applied to each of the electronic devices, and may be executed by each of the voltage conversion modules in the electronic devices, or may be executed by an independent control module in the electronic devices, for example.

Referring to fig. 9, a charge and discharge control method 900 includes:

in step S910, a first output voltage and/or a first output current provided by a charging interface of the electronic device are converted into a charging voltage and/or a charging current required by a battery cell correspondingly connected to each voltage conversion module through at least two voltage conversion modules in the electronic device, respectively.

According to the charge and discharge control method provided by the embodiment of the disclosure, the output voltage and/or the output current provided by the charging interface is converted into the charging voltage and/or the charging current required by the battery unit correspondingly connected with the charging interface through the voltage conversion module respectively connected with each battery unit, so that each battery unit can be independently charged, the capacity and the internal resistance of each battery unit are not required to be strictly consistent, and an additional equalization scheme is not required. Even in the case where each battery cell has different parameters, each battery cell can be fully charged, achieving maximum utilization of the battery capacity.

Fig. 10 is a flowchart illustrating another charge and discharge control method according to an exemplary embodiment. Unlike the charge/discharge control method 900 shown in fig. 9, the charge/discharge control method 1000 shown in fig. 10 further includes:

in step S1020, a voltage conversion mode when each voltage conversion module charges the corresponding connected battery unit is determined according to the output voltage provided by the charging interface of the electronic device, the current voltage of each battery unit, and the first voltage threshold.

The voltage conversion mode may be, for example, step-up or step-down.

In some embodiments, as shown in fig. 11, step S1020 includes:

in step S1022, it is compared whether the difference between the first output voltage and the current voltage of each battery cell is greater than a first voltage threshold.

In step S1024, when the difference between the first output voltage and the current voltage of the battery cell is greater than the first voltage threshold, it is determined that the voltage conversion mode when the voltage conversion module correspondingly connected to the battery cell charges the battery cell is step-down.

In step S1026, when the difference between the first output voltage and the current voltage of the battery cell is less than or equal to the first voltage threshold, the voltage conversion mode when the voltage conversion module correspondingly connected to the battery cell charges the battery cell is determined as boosting.

Fig. 12 is a flowchart illustrating a further charge and discharge control method according to an exemplary embodiment. Unlike the charge/discharge control method 1000 shown in fig. 10, the charge/discharge control method 1200 shown in fig. 12 further includes:

in step S1230, at least two switch units in the electronic device are respectively controlled to be turned on or off according to the current voltage of each battery unit.

And each switch unit is correspondingly connected between the charging interface and each voltage conversion module.

By controlling the on-off of the switch unit, the battery unit which is fully charged or the battery unit with abnormal conditions can be independently controlled to stop charging.

Fig. 13 is a flowchart illustrating a further charge and discharge control method according to an exemplary embodiment. Unlike the charge and discharge control method 1200 shown in fig. 12, the charge and discharge control method 1300 shown in fig. 13 further includes:

in step S1340, the second output voltage and/or the second output current provided by the corresponding connected battery unit is converted into a supply voltage and/or a supply current required by a circuit to be supplied in the electronic device by each voltage conversion module.

And the voltage conversion modules can also independently control the power supply of the battery units to the circuit to be powered.

Fig. 14 is a flowchart illustrating a further charge and discharge control method according to an exemplary embodiment. Unlike the charge and discharge control method 1300 shown in fig. 13, the charge and discharge control method 1400 shown in fig. 14 further includes:

in step S1450, a voltage conversion mode when the correspondingly connected voltage conversion module supplies power to the circuit to be powered is respectively determined according to the current voltage of each battery cell and the second voltage threshold.

The voltage conversion mode may include, for example, step-up or step-down.

In some embodiments, as shown in fig. 15, step S1450 may further include:

in step S1452, it is determined whether the current voltage of each battery cell is greater than a second voltage threshold, respectively.

In step S1454, when the current voltage of the battery unit is greater than the second voltage threshold, it is determined that the voltage conversion mode when the voltage conversion module correspondingly connected to the battery unit supplies power to the circuit to be powered is step-down.

In step S1456, when the current voltage of the battery unit is less than or equal to the second voltage threshold, it is determined that the voltage conversion mode when the voltage conversion module correspondingly connected to the battery unit supplies power to the circuit to be powered is boosting.

It is noted that the above-mentioned figures are merely schematic illustrations of processes involved in methods according to exemplary embodiments of the present disclosure, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.

It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, 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 disclosure being indicated by the following claims.

Claims

1. An electronic device, comprising:

a charging interface;

at least two battery cells connected in series; and

at least two voltage conversion modules which are respectively and correspondingly connected with the battery units;

each battery unit is connected with the charging interface through a voltage conversion module correspondingly connected with the battery unit; each voltage conversion module is respectively used for converting the first output voltage and/or the first output current provided by the charging interface into the charging voltage and/or the charging current required by the corresponding connected battery unit.

2. The electronic device of claim 1, wherein each of the voltage conversion modules is further configured to determine a voltage conversion mode when the corresponding connected battery unit is charged according to the first output voltage, a current voltage of the corresponding connected battery unit, and a first voltage threshold.

3. The method of claim 2, wherein each of the voltage conversion modules comprises: a comparator; each comparator is used for comparing whether the difference value between the first output voltage and the current voltage of the corresponding connected battery unit is greater than the first voltage threshold value or not; when the difference value between the first output voltage and the current voltage of the correspondingly connected battery unit is larger than the first voltage threshold value, determining that the voltage conversion mode when the corresponding voltage conversion module charges the correspondingly connected battery unit is voltage reduction; and when the difference value between the first output voltage and the current voltage of the correspondingly connected battery unit is smaller than or equal to the first voltage threshold value, determining that the voltage conversion mode when the corresponding voltage conversion module charges the correspondingly connected battery unit is boosting.

4. The electronic device of claim 2, further comprising: at least two switch units respectively and correspondingly connected between the charging interface and each voltage conversion module; and each voltage conversion module is also used for controlling the on-off of the corresponding connected switch unit according to the current voltage of the corresponding connected battery unit.

5. The electronic device of any of claims 1-4, further comprising: the circuit to be powered is respectively connected with each voltage conversion module; each voltage conversion module is further used for converting a second output voltage and/or a second output current provided by the corresponding connected battery unit into a supply voltage and/or a supply current required by the circuit to be supplied.

6. The electronic device according to claim 5, wherein each of the voltage conversion modules is further configured to determine a voltage conversion mode when the circuit to be powered is powered according to a current voltage of the corresponding connected battery unit and a second voltage threshold.

7. The electronic device of claim 6, wherein each of the voltage conversion modules is further configured to determine whether a current voltage of the corresponding connected battery cell is greater than the second voltage threshold; when the current voltage of the corresponding connected battery unit is larger than the second voltage threshold, determining that the voltage conversion mode when the circuit to be powered is voltage reduction; and when the current voltage of the corresponding connected battery unit is less than or equal to the second voltage threshold, determining that the voltage conversion mode when the circuit to be powered is boosting.

8. The electronic device of claim 1, further comprising: and the control module is connected with each battery unit, each voltage conversion module and the charging interface and is used for respectively determining the voltage conversion mode when each voltage conversion module charges the corresponding connected battery unit according to the first output voltage, the current voltage of each battery unit and the first voltage threshold.

9. The electronic device of claim 8, further comprising: the circuit to be powered is respectively connected with each voltage conversion module; the control module is further configured to determine a voltage conversion mode when the correspondingly connected voltage conversion module supplies power to the circuit to be powered according to the current voltage of each battery unit and the second voltage threshold.

10. A charge and discharge control method is applied to electronic equipment and is characterized by comprising the following steps:

the method comprises the steps that first output voltage and/or first output current provided by a charging interface of the electronic equipment are converted into charging voltage and/or charging current required by battery units correspondingly connected with the voltage conversion modules through at least two voltage conversion modules in the electronic equipment respectively.

11. The method of claim 10, further comprising:

and respectively determining a voltage conversion mode when each voltage conversion module charges the corresponding connected battery unit according to the first output voltage, the current voltage of each battery unit and the first voltage threshold.

12. The method of claim 11, wherein determining the voltage conversion mode for each voltage conversion module to charge the corresponding connected battery cell according to the first output voltage, the current voltage of each battery cell, and a first voltage threshold comprises:

comparing whether the difference value between the first output voltage and the current voltage of each battery unit is larger than the first voltage threshold value;

when the difference value between the first output voltage and the current voltage of the battery unit is larger than the first voltage threshold value, determining that the voltage conversion mode when a voltage conversion module correspondingly connected with the battery unit charges the battery unit is voltage reduction;

and when the difference value between the first output voltage and the current voltage of the battery unit is smaller than or equal to the first voltage threshold value, determining that the voltage conversion mode when the voltage conversion module correspondingly connected with the battery unit charges the battery unit is boosting.

13. The method of claim 11, further comprising:

respectively controlling the on or off of at least two switch units in the electronic equipment according to the current voltage of each battery unit;

14. The method according to any one of claims 10-13, further comprising:

and converting the second output voltage and/or the second output current provided by the correspondingly connected battery unit into a power supply voltage and/or a power supply current required by a circuit to be powered in the electronic equipment through each voltage conversion module.

15. The method of claim 14, further comprising:

and respectively determining a voltage conversion mode when the correspondingly connected voltage conversion module supplies power to the circuit to be powered according to the current voltage and the second voltage threshold of each battery unit.

16. The method according to claim 15, wherein determining a voltage conversion mode when the correspondingly connected voltage conversion module supplies power to the circuit to be powered according to the current voltage of each battery cell and the second voltage threshold respectively comprises:

respectively determining whether the current voltage of each battery unit is greater than the second voltage threshold value;

when the current voltage of the battery unit is greater than the second voltage threshold, determining that the voltage conversion mode when the voltage conversion module correspondingly connected with the battery unit supplies power to the circuit to be powered is voltage reduction;

when the current voltage of the battery unit is smaller than or equal to the second voltage threshold, determining that the voltage conversion mode when the voltage conversion module correspondingly connected with the battery unit supplies power to the circuit to be powered is boosting.