CN113489103A

CN113489103A - Power supply device, electric equipment, control method and electronic equipment

Info

Publication number: CN113489103A
Application number: CN202110790696.2A
Authority: CN
Inventors: 邱培
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2021-10-08

Abstract

The disclosure provides a power supply device, electric equipment, a control method of the power supply device and electronic equipment, and relates to the technical field of batteries. The power supply device is applied to electric equipment and can comprise: at least two batteries, each battery is arranged in parallel; the power management module is used for controlling charging and discharging of the battery; the power management module comprises at least two connecting passages, a power supply module and a battery, wherein the connecting passages are used for connecting the power supply management module and the battery; the current limiting switch module is arranged on at least part of the target connecting path and used for controlling the on-off of the target connecting path, and the target connecting path is a connecting path meeting preset conditions; and the balancing resistor is connected with the current-limiting switch module in parallel and used for balancing the voltage difference between the at least two batteries when the current-limiting switch module is disconnected. The method and the device can balance the voltage between the parallel batteries under the condition that the mobile phone is turned off.

Description

Power supply device, electric equipment, control method and electronic equipment

Technical Field

The present disclosure relates to the field of battery technologies, and in particular, to a power supply device, an electric device, a control method of the power supply device, and an electronic device.

Background

With the rapid development of the folding screen mobile phone, in order to improve the capacity of the battery, battery bins are reserved below the screens on the two sides of the folding screen mobile phone and are used for installing a plurality of batteries.

Due to the limitation of available space of the mobile phone, the sizes of two battery bins below the screens on both sides are usually different, resulting in different battery capacities of the two batteries. Batteries with different battery capacities usually need to be connected in parallel during charging.

However, when the mobile phone is turned off for a long time, the batteries arranged in parallel have the problem of unbalanced leakage current.

Disclosure of Invention

The present disclosure provides a power supply device, an electrical apparatus, a control method of the power supply device, and an electronic apparatus, so as to overcome, at least to a certain extent, a problem of unbalanced leakage current between batteries connected in parallel when a mobile phone is turned off for a long time.

According to a first aspect of the present disclosure, there is provided a power supply device including: at least two batteries, each of the batteries being arranged in parallel; the power management module is used for controlling the charging and discharging of the battery; at least two connection paths for connecting the power management module and the battery; the current limiting switch module is arranged on at least part of target connecting paths and used for controlling the on-off of the target connecting paths, and the target connecting paths are the connecting paths meeting preset conditions; and the balancing resistor is connected with the current-limiting switch module in parallel and used for balancing the voltage difference between the at least two batteries when the current-limiting switch module is disconnected.

According to a second aspect of the present disclosure, there is provided an electric device including the power supply apparatus described above.

According to a third aspect of the present disclosure, there is provided a control method of a power supply apparatus, the power supply apparatus including at least two batteries, a power management module and at least two connection paths, the batteries being arranged in parallel, the power management module being configured to control charging and discharging of the batteries, the connection paths being configured to connect the power management module and the batteries, the method including: arranging a current limiting switch module on at least part of a target connecting path, and controlling the target connecting path to be connected and disconnected through the current limiting switch module; the target connection path is a connection path meeting a preset condition; and a balancing resistor is arranged on the current limiting switch module in parallel, so that when the current limiting switch module is switched off, the voltage difference between the at least two batteries is balanced through the balancing resistor.

According to a fourth aspect of the present disclosure, there is provided an electronic device comprising: a processor; a memory for storing one or more programs, which when executed by the processor, cause the processor to implement the control method of the power supply apparatus described above.

In the technical solutions provided in some embodiments of the present disclosure, on one hand, by providing a current-limiting switch module, and the current-limiting switch module is disposed on at least a part of the target connection path, in a charging process, if a charging rate of a battery on the target connection path is faster, a charging current on the target connection path may be limited by the current-limiting switch module, and even the target connection path may be closed by the current-limiting switch module, so that a corresponding charging rate is slowed down, so that each battery can be charged to saturation, and a loss of a charging capacity between each battery is reduced. On the other hand, the balancing resistor is connected in parallel with the current-limiting switch module, so that the battery on the target connection path generates leakage current when the electric equipment is shut down and the current-limiting switch module is disconnected, the difference of the power consumption of the battery on the non-target connection path can be reduced, and the purposes of balancing the voltage between the two batteries and reducing the voltage difference are achieved.

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. In the drawings:

fig. 1 schematically illustrates a structural schematic diagram of a power supply apparatus according to an exemplary embodiment of the present disclosure;

fig. 2 schematically illustrates a structural schematic of a current limiting switch module according to an exemplary embodiment of the present disclosure;

fig. 3 schematically shows a circuit diagram of a power supply apparatus according to an exemplary embodiment of the present disclosure;

fig. 4 schematically shows a circuit diagram of another power supply apparatus according to an exemplary embodiment of the present disclosure;

fig. 5 schematically illustrates a circuit diagram of another power supply apparatus according to an exemplary embodiment of the present disclosure;

fig. 6 schematically shows a structural schematic diagram of an electric device provided with a power supply apparatus according to an exemplary embodiment of the present disclosure;

fig. 7 schematically illustrates an internal structure of an electric device according to an exemplary embodiment of the present disclosure;

fig. 8 schematically shows a flowchart of a control method of a power supply apparatus according to an exemplary embodiment of the present disclosure.

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. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.

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.

The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the steps. For example, some steps may be decomposed, and some steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation. In addition, all of the following terms "first" and "second" are used for distinguishing purposes only and should not be construed as limiting the present disclosure.

The exemplary embodiment of the present disclosure provides a power supply device applied to an electric device. In one embodiment, the powered Device may be a Mobile phone, a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable Device (e.g., a smart watch, a smart bracelet, a pedometer, etc.), or other electronic communication module including the above power supply Device.

Taking a mobile phone as an example, in order to increase the capacity of a battery in the mobile phone, a special-shaped battery compartment is arranged in part of the mobile phone, and two batteries with different sizes and capacities are required to be used in the special-shaped battery compartment. Or, two batteries with different sizes and capacities are respectively arranged below the screens on the two sides of the partially folded screen mobile phone.

For batteries with different capacities, the charging current of the two batteries is the same when the batteries are charged in series, which causes the problem of unbalanced voltage of the two batteries. Therefore, referring to fig. 1, the power supply apparatus 100 according to the exemplary embodiment of the present disclosure includes at least two batteries, and the batteries are connected in parallel. For batteries with different capacities, the problem of voltage imbalance among the batteries can be reduced by adopting a parallel arrangement mode. Two batteries are shown in fig. 1, including a first battery 111 and a second battery 112.

In practical applications, the battery may be a rechargeable battery, for example, a battery prepared from a lithium material and a nickel-hydrogen material or a graphene material, and the material of the battery is not particularly limited in the exemplary embodiments of the present disclosure.

In the exemplary embodiment of the present disclosure, the Power supply device 100 further includes a Power Management module 120(Power Management IC, PMIC) and at least two connection paths, the Power Management module 120 is configured to control charging and discharging of the battery, and the connection paths are configured to connect the Power Management module 120 and the battery. For example, in fig. 1, the first connection path 131 is used to connect the power management module 120 and the first battery 111, and the power management module 120 controls the first battery 111 to charge and discharge through the first connection path 131; the second connection path 132 is used to connect the power management module 120 and the second battery 112, and the power management module 120 controls the second battery 112 to charge and discharge through the second connection path 132.

In practical application, due to different capacities among the batteries and different path impedances of the connection paths, the charge loss in the charging process is different, so that when some batteries reach saturation, other batteries are not fully charged, and the voltage imbalance among the batteries is generated. The power supply apparatus 100 according to the exemplary embodiment of the present disclosure alleviates the imbalance problem between the batteries by providing the current-limiting switch module 140 and the balancing resistor 150.

Specifically, the current limit switch module 140 may be disposed on at least a portion of a target connection path, where the target connection path is a connection path that meets a preset condition, and the current limit switch module 140 is mainly used to control on/off of the target connection path. In the charging process, if the charging rate of the battery on the target connection path is faster, the charging current on the target connection path can be limited through the current-limiting switch module 140, and even the target connection path can be closed through the current-limiting switch module 140, so that the corresponding charging rate is slowed down, each battery can be charged to saturation as much as possible, and the loss of the charging capacity among the batteries is reduced.

In practical applications, when the electric device is in a long-term shutdown state, the current-limiting switch module 140 on the target connection path is also turned off. In this case, the battery on the target connection path is completely disconnected from the electric device, and the leakage current is small; however, for the non-target connection path without the current-limiting switch module 140, the battery thereon is not disconnected from the electric device, and the leakage current is large. Therefore, under the condition that the electric equipment is shut down for a long time, the phenomenon that the power consumption of the battery on the non-target connection circuit is far larger than that of the battery on the target connection circuit occurs, so that the voltage imbalance and the voltage difference between the two batteries occur, and even the condition that the current-limiting switch module 140 cannot be opened occurs.

Taking fig. 1 as an example, it is assumed that a connection path where the first battery 111 is located, that is, the first connection path 131, is a target connection path, and a current-limiting switch module 140 is disposed on the target connection path, when the electric device is turned off, the current-limiting switch module 140 is in an off state, the first battery 111 is completely disconnected from the power management module 120, and the first battery 111 does not perform charging and discharging operations. The connection path where the second battery 112 is located is a non-target connection path, and a current-limiting switch module is not provided thereon, so that when the electrical equipment is turned off, the second battery 112 may need to supply a small amount of power to a system of the electrical equipment.

In order to equalize the voltage difference between at least two batteries when the electric equipment is shut down, the equalizing resistor 150 connected with the current-limiting switch module 140 in parallel is arranged, so that the battery on the target connection path can generate leakage current when the current-limiting switch module 140 is in an off state, and the difference of the power consumption of the battery on the non-target connection path can be reduced, thereby achieving the purposes of equalizing the voltage between the two batteries and reducing the voltage difference.

As shown in fig. 1, the balancing resistor 150 connected in parallel with the current limiting switch module 140 is connected in series with the first battery 111, and in a case where the electric device is turned off and the current limiting switch module 140 is turned off, the balancing resistor 150 may provide a path for the first battery 111 to have a small amount of leakage current, so as to achieve a balance with the leakage current on the second battery 112, thereby reducing an imbalance between the first battery 111 and the second battery 112.

In the power supply device provided by the exemplary embodiment of the present disclosure, on one hand, by providing the current limiting switch module 140, and the current limiting switch module 140 is disposed on at least a portion of the target connection path, in the charging process, if the charging rate of the battery on the target connection path is faster, the charging current on the target connection path may be limited by the current limiting switch module, and even the target connection path may be closed by the current limiting switch module 140, so that the corresponding charging rate is slowed down, so that each battery can be charged to saturation, and the loss of the charging capacity between each battery is reduced. On the other hand, by connecting the balancing resistor 150 in parallel to the current-limiting switch module 140, when the power-consuming device is turned off and the current-limiting switch module 140 is turned off, the battery on the target connection path may generate leakage current, so as to reduce the difference between the power consumption of the battery on the non-target connection path, thereby achieving the purpose of balancing the voltage between the two batteries and reducing the voltage difference.

In practical application, in order to avoid imbalance caused by factors such as battery difference, path impedance of a connection path, battery aging and the like, when a plurality of batteries are connected in parallel, the current-limiting switch module 140 and the corresponding equalizing resistor 150 may be arranged on all the connection paths, or the current-limiting switch module 140 and the corresponding equalizing resistor 150 may be arranged on part of target connection paths, so that when the charging rates are different, the charging current is fed back and adjusted in time, and the batteries are equalized in the charging process.

In order to reduce the cost, reduce the heat loss caused by the current-limiting switch module 140, and achieve the fast charging, the exemplary embodiment of the present disclosure does not set the current-limiting switch module 140 and the corresponding balancing resistor 150 on all connection paths, but sets the current-limiting switch module 140 and the corresponding balancing resistor 150 on the target connection path, and the purpose of balancing the battery voltage can also be achieved.

In addition, in the exemplary embodiment of the present disclosure, the current-limiting switch module 140 and the corresponding balancing resistor 150 are disposed on all target connection paths, and the voltage between the batteries can be balanced to the maximum extent on the basis of reducing the cost.

In practical applications, the target connection path may be a connection path satisfying a preset condition, where the preset condition may be determined according to practical situations. In an exemplary embodiment of the present disclosure, the target connection path is a connection path whose path impedance is a non-maximum path impedance. That is, of the at least two connection paths, the remaining connection paths are all the target connection paths except the connection path having the largest path impedance. For example, there are A, B, C connection paths, where the path impedance of connection path a is the largest, then connection paths B and C may be determined as target connection paths, and current-limiting switch module 140 and corresponding balancing resistor 150 are disposed on target connection paths B and C.

In practical applications, if the path impedances of the connection paths are equal in the process of determining the target connection path, the target connection path may be determined as the connection path where the non-maximum capacity battery is located. That is, the target connection path satisfying the preset condition may be a connection path in which the non-maximum-capacity battery is located when the path impedances of the respective connection paths are equal. For example, assuming that the path impedances of the A, B, C three connection paths are equal and the battery capacity on the connection path B is the maximum, the connection paths a and C may be determined as target connection paths, and the current-limiting switch module 140 and the corresponding balancing resistor 150 are disposed on the target connection paths a and C.

In the power supply apparatus according to the exemplary embodiment of the present disclosure, although the capacities of the batteries are equal, the path impedances of the connection paths in which the batteries are located are different, in this case, the target connection path may be determined as a connection path other than the maximum path impedance, and the current-limiting switch module 140 and the corresponding balancing resistor 150 may be provided in the connection path other than the maximum path impedance.

In practical applications, if the path impedance of the connection path where the large-capacity battery is located is small, the current-limiting switch module 140 may not be provided. Based on this, the exemplary embodiments of the present disclosure also define a condition for setting the current limit switch module 140, that is, setting the current limit switch module 140 when a difference between a battery capacity ratio and a path impedance ratio on any two connection paths is greater than a preset value. Wherein the battery capacity ratio is the capacity C of a large-capacity battery_{Big (a)}Capacity C of small capacity battery_SmallRatio of (A to B)

The path impedance ratio being the resistance R of the small-capacity battery_SmallResistance R with large capacity battery_{Big (a)}Ratio of (A to B)

And the number of the first and second electrodes,

in practical applications, the preset value may be determined according to practical situations, for example, the preset value may be any value between 0.2 and 0.4, for example, 0.3. The exemplary embodiments of the present disclosure do not particularly limit the preset value.

It should be noted that, as the battery aging degree increases, the difference between the battery capacity ratio and the path impedance ratio is gradually larger than the preset value. Therefore, in order to improve the stability of the power supply apparatus, the current limit switch module 140 may be provided on at least a portion of the target connection path when the difference between the battery capacity ratio and the path impedance ratio is smaller than a preset value, as space allows.

In practical application, the equalizing resistor 150 is mainly used for generating leakage current for the battery on the target connection path when the power consumption device is turned off and the current limiting switch module 140 is turned off. The leakage current is mainly balanced with the leakage current of the battery on the non-target connection path, and since the leakage current itself is small in the power-off state of the electric device, the resistance value of the equalizing resistor 150 provided in the exemplary embodiment of the present disclosure is large, so that the small leakage current is generated on the target connection path.

Specifically, the maximum expected voltage difference Δ V may be determined according to the power consumption IQ of the battery on the non-target connection path, the system power consumption of the electric device in the shutdown state, and the maximum expected voltage difference Δ V of the at least two batteries; when the number of the cells is greater than two, the maximum expected pressure difference Δ V may be the maximum value of the maximum expected pressure differences determined after comparing two cells. For example, assuming that there are three batteries, Battery1, Battery2, and Battery3, where the maximum desired pressure difference between Battery1 and Battery2 is Δ V1, the maximum desired pressure difference between Battery1 and Battery3 is Δ V2, the maximum desired pressure difference between Battery2 and Battery3 is Δ V3, and Δ V1 is the maximum of the three maximum desired pressure differences Δ V1, Δ V2, and Δ V3, Δ V1 is the above-mentioned maximum desired pressure difference Δ V.

In the exemplary embodiment of the present disclosure, the resistance value of the equalizing resistor 150 is smaller than the product of the battery power consumption IQ and the maximum expected voltage difference Δ V. Specifically, the resistance of the equalizing resistor 150 may be less than or equal to twice the product of the battery power consumption IQ and the maximum expected voltage difference Δ V. For example, when the battery power consumption IQ is 1mA and the maximum desired voltage difference Δ V is 50mV, the resistance value of the balancing resistor 150 is less than or equal to 100 Ω.

In practical applications, since the resistance of the balancing resistor 150 is large, the current passing through the balancing resistor 150 is small, the balancing resistor 150 is not damaged, and the balancing resistor 150 does not affect the distribution of the charging current to the current limiting switch module 140 when the current limiting switch module 140 is turned on. For example, when the resistance value of the balancing resistor 150 is equal to 100 Ω, the full-charge voltage of the large-capacity battery is 4.5V, and the voltage of the small-capacity battery is 0V, the maximum current flowing through the balancing resistor 150 is Imax (4.5V-0V)/100 Ω 45mA, and the maximum current is small and has almost no influence on the normal charging current distribution.

In practical applications, the rated power of the balancing resistor 150 may be determined according to actual conditions, for example, in the above example, the power consumption P ═ Δ Vmax ═ Imax ═ 0.2025W of the balancing resistor 150, and therefore, the rated power of the balancing resistor may be set to any value between 0.3W and 0.5W, for example, 0.5W. The exemplary embodiments of the present disclosure are not particularly limited in this regard.

In practical applications, the structure of the current-limiting switch module 140 may be set according to specific requirements, for example, referring to fig. 2, the current-limiting switch module 140 may include a switch unit 141, and the balancing resistor 150 is mainly connected in parallel with the switch unit 141 to achieve the above purpose.

In an optional implementation manner of the embodiment of the present disclosure, the switching unit 141 may be a MOS transistor, and the current limiting switching module 140 may further include a sensor for collecting a current of the MOS transistor in addition to the switching unit 141142 and a voltage control unit; the voltage control unit may include a comparator 143 and a voltage converter 144, where the comparator 143 may be configured to access the MOS transistor current collected by the sensor 142, and to compare the MOS transistor current with a reference current V_REFIn contrast, to output a feedback signal to the voltage converter 144; the output terminal of the voltage converter 144 is connected to the gate of the MOS transistor, and is used for changing the current flowing through the MOS transistor according to the feedback signal, so as to achieve the purpose of changing the charging current on the target connection path.

In order to achieve the above-mentioned purpose of equalizing the voltage between the two batteries when the power consumption device is turned off and the current limiting switch module 140 is turned off, in the exemplary embodiment of the present disclosure, as shown in fig. 2, the equalizing resistor 150 is disposed in parallel at two ends of the MOS transistor, and when the MOS transistor is turned off, a small amount of leakage current is provided for the battery on the target connection path to balance the leakage current of the battery on the non-target connection path.

Referring to fig. 3, a circuit diagram of a power supply apparatus according to an exemplary embodiment of the present disclosure is shown. The power supply apparatus shown in fig. 3 may be disposed on an electric device having a foldable screen, wherein two batteries 410 are disposed in parallel, one of the batteries 410 is disposed on a target connection path 420, and the target connection path 420 is disposed with a current-limiting switch module 140 and an equalizing resistor 150; another battery 410 is disposed on a non-target connection path 430, a flexible circuit board 440 is further disposed on the non-target connection path 430, and a path impedance of the non-target connection path 430 is greater than a path impedance of the target connection path 420.

In addition, the power management module 120 in the power supply apparatus shown in fig. 3 includes a voltage detection unit 121 and a current detection unit 122, where the voltage detection unit 121 and the current detection unit 122 are respectively used for measuring the total current and the total voltage of the two batteries 410, and here, reference may be made to fig. 3 for a specific arrangement manner of the voltage detection unit 121 and the current detection unit 122, which is not repeated here.

In addition to the above-mentioned structure of the current limiting switch module 140, as shown in fig. 4, the current limiting switch module 140 may be a load switch, and the load switch may include the current detecting resistor 510 and the above-mentioned switch unit 141. The equalizing resistor 150 may be disposed in parallel only at both ends of the switching unit 141 and connected in series with the current detecting resistor 510, so that the folding screen device 600 may be turned off. When the switching unit 141 is turned off, the current detection resistor 510 and the balancing resistor 150 act together to generate a leakage current. And because the current detection resistor 510 can also adjust the magnitude of the leakage current according to the detected current result, the purpose of intelligently adjusting the leakage current on the target connection circuit is achieved, and the difference of the power consumption among the batteries can be adjusted more flexibly, so that the adjusting effect is better.

As can be seen from the circuit diagrams shown in fig. 3 and 4, at least one protection circuit 450 is disposed in parallel on each of the two batteries 410, and the current limiting switch 451 of the protection circuit 450 is disposed on the connection path. Therefore, in the exemplary embodiment of the present disclosure, the current limiting switch 451 of the protection circuit 450 may also be used as the current limiting switch module 140, that is, the current limiting protection is achieved directly through the current limiting switch 451 of the protection circuit 450. Therefore, the equalizing resistor 150 can be directly connected in parallel with the current limiting switch 451, so that when the electric equipment is shut down and the current limiting switch 451 is disconnected, the voltage between the two batteries is equalized. The specific arrangement can be referred to fig. 5.

In fig. 5, the number of equalizing resistors 150 is determined by the number of current limiting switches 451, that is, the number of protection circuits 450, and it is generally required to connect one equalizing resistor 150 in parallel to each current limiting switch 451 of the protection circuit 450 on the target connection path.

It should be noted that all or part of the modules of the power supply apparatus may be implemented by software, hardware, or a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

The exemplary embodiment of the present disclosure further provides an electric device, which includes the above power supply apparatus, wherein a specific setting manner and an operation principle of the power supply apparatus have been described in detail in the above embodiments, and are not described again here.

In an exemplary implementation manner of the embodiment of the present disclosure, the electric device may be a folding screen device. Referring to fig. 6, a case where the power supply device 100 is provided in a folding screen apparatus 600 having a folding screen is exemplified. The folding screen device 600 includes a first folding portion 610 and a second folding portion 620, the first folding portion 610 is provided with a power management module 120 and a first battery 111 having a first capacity, and the second folding portion 620 is provided with a second battery 112 having a second capacity, wherein the first capacity is smaller than the second capacity.

In the folding screen apparatus 600, the first battery 111 is closer to the power management module 120 than the second battery 112, and the charging chip is generally disposed in the power management module 120, so that the path impedance of the first battery 111 is smaller. The second battery 112 is not only far from the charging chip, but also may have a flexible circuit board path disposed thereon, so that the path impedance of the connection path where the second battery 112 is located is greater than the path impedance of the connection path where the first battery 111 is located, and therefore, the current-limiting switch module 140 and the balancing resistor 150 may be disposed on the connection path where the first battery 111 having the first capacity is located.

Since the capacity of the first battery 111 is smaller than the capacity of the second battery 112 and the impedance of the path of the connection path of the first battery 111 is smaller, during the charging process, if the charging current of the connection path of the first battery 111 is greater than the reference current, the charging current of the first battery 111 can be reduced by the current-limiting switch module 140, so as to ensure that the first battery 111 and the second battery 112 can reach the charging saturation state at the same time. If the first battery 111 still reaches the state of charge saturation faster than the second battery 112 after the current limiting, the current limiting switch module 140 may be turned off when the first battery 111 reaches the state of charge saturation, and only the second battery 112 may be charged, so that the second battery 112 reaches the state of charge saturation, and thus the loss of charge capacity may be minimized.

In addition, under the condition that the folding screen device 600 is turned off, the balancing resistor 150 connected in parallel with the current-limiting switch module 140 can enable the first battery 111 to continuously generate leakage current when the current-limiting switch module 140 is turned off, so that the difference between the power consumption of the first battery 111 and the power consumption of the second battery 112 can be reduced, and the purposes of balancing the voltage between the two batteries and reducing the voltage difference can be achieved.

Fig. 7 shows a schematic diagram of an internal structure of a powered device suitable for use in applying exemplary embodiments of the present disclosure. It should be noted that the electric device shown in fig. 7 is only an example, and should not bring any limitation to the function and the use range of the embodiment of the present disclosure.

The powered device of the present disclosure includes at least a processor and a memory for storing one or more programs. The electric equipment can be any terminal equipment such as a mobile phone, a tablet Personal computer, a Personal Digital Assistant (PDA), a Point of Sales (POS), a vehicle-mounted computer, and a wearable device.

Specifically, as shown in fig. 7, the electric device 700 may include: the mobile phone includes a processor 710, an internal memory 721, an external memory interface 722, a Universal Serial Bus (USB) interface 730, a charging management Module 740, an antenna 1, an antenna 2, a mobile communication Module 750, a wireless communication Module 760, an audio Module 770, a speaker 771, a receiver 772, a microphone 773, an earphone interface 774, a sensor Module 780, a display 790, a camera Module 791, an indicator 792, a motor 793, a button 794, a Subscriber Identity Module (SIM) card interface 795, the power supply 100, and the like. The sensor module 780 may include a depth sensor, a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, and the like.

It is to be understood that the illustrated structure of the embodiments of the present disclosure does not constitute a specific limitation to the electric device 700. In other embodiments of the present disclosure, powered device 700 may include more or fewer components than shown, or combine certain components, or split certain components, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

Processor 710 may include one or more processing units, such as: the Processor 710 may include an Application Processor (AP), a modem Processor, a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a video codec, a Digital Signal Processor (DSP), a baseband Processor, and/or a Neural Network Processor (NPU), and the like. The different processing units may be separate devices or may be integrated into one or more processors. Additionally, a memory may be provided in processor 710 for storing instructions and data.

The electric device 700 may implement an audio/video playing function through the ISP, the video codec, the GPU, the display 790, the speaker 771, the application processor, and the like. When the various functions are realized, the power supply device provided by the exemplary embodiment of the present disclosure is required to supply power.

In addition, the exemplary embodiment of the present disclosure further provides a control method of a power supply apparatus, which is applied to the power supply apparatus, the power supply apparatus includes at least two batteries, a power management module and at least two connection paths, the batteries are connected in parallel, the power management module is used for controlling charging and discharging of the batteries, and the connection paths are used for connecting the power management module and the batteries. As shown in fig. 8, the control method of the power supply apparatus may include:

step S810, arranging a current-limiting switch module on at least part of the target connecting path, and controlling the target connecting path to be connected and disconnected through the current-limiting switch module; wherein, the target connection path is a connection path meeting the preset condition.

In the actual charging process, if the charging rate of the battery on the target connection path is higher, the charging current on the target connection path can be limited through the current-limiting switch module, and even the target connection path can be closed through the current-limiting switch module, so that the corresponding charging rate is reduced, all the batteries can be charged to saturation as much as possible, and the loss of the charging capacity among the batteries is reduced.

And step S820, arranging a balance resistor in parallel on the current-limiting switch module so as to balance the voltage difference between the at least two batteries through the balance resistor when the current-limiting switch module is disconnected.

In order to equalize the voltage difference between at least two batteries when the electric equipment is shut down, the equalizing resistor connected with the current-limiting switch module in parallel is arranged, so that the batteries on the target connection path can generate leakage current when the current-limiting switch module is in an off state, and further the difference of the power consumption of the batteries on the non-target connection path can be reduced, thereby achieving the purposes of equalizing the voltage between the two batteries and reducing the voltage difference.

For the preset conditions to be satisfied by the target connection path, the setting modes of the current-limiting switch module and the equalizing resistor, and the control methods thereof, reference may be made to the foregoing embodiments, and details are not repeated here.

Accordingly, exemplary embodiments of the present disclosure also provide an electronic device including a processor and a memory connected by a system bus. Wherein, the processor is used for providing calculation and control capability and supporting the operation of the whole electronic equipment. The memory may include a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The computer program is executable by a processor to implement a control method of a power supply apparatus provided in each of the following embodiments. For example, the processor may execute step S810 shown in fig. 8, and set a current-limiting switch module on at least a part of the target connection path, and control the target connection path to be switched on and off through the current-limiting switch module; the target connection path is a connection path meeting a preset condition; and step S820, arranging a balance resistor in parallel on the current-limiting switch module so as to balance the voltage difference between the at least two batteries through the balance resistor when the current-limiting switch module is disconnected.

The computer program may be run on a terminal or a server. Program modules constituted by such computer programs may be stored on the memory of the electronic device. The computer program, when executed by a processor, implements the steps of the method described in the exemplary embodiments of the present disclosure.

An exemplary embodiment of the present disclosure is a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a control method such as a power supply apparatus:

a computer program product comprising instructions which, when run on a computer, cause the computer to perform the above-mentioned method.

Any reference to memory, storage, database, or other medium used herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and bus dynamic RAM (RDRAM).

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A power supply device, comprising:

at least two batteries, each of the batteries being arranged in parallel;

the power management module is used for controlling the charging and discharging of the battery;

at least two connection paths for connecting the power management module and the battery;

the current limiting switch module is arranged on at least part of target connecting paths and used for controlling the on-off of the target connecting paths, and the target connecting paths are the connecting paths meeting preset conditions;

and the balancing resistor is connected with the current-limiting switch module in parallel and used for balancing the voltage difference between the at least two batteries when the current-limiting switch module is disconnected.

2. The power supply device according to claim 1, wherein the current-limiting switch module and the corresponding balancing resistor are provided on all the target connection paths.

3. The power supply device according to claim 1, wherein the connection path satisfying the preset condition is a connection path whose path impedance is a non-maximum path impedance.

4. The power supply device according to claim 1, wherein the connection paths satisfying the preset condition are connection paths in which a non-maximum capacity battery is located in a case where path impedances of the connection paths are equal.

5. The power supply device according to claim 4, wherein the current-limiting switch module is set when a difference between a battery capacity ratio and a path impedance ratio on any two of the connection paths is greater than a preset value;

wherein the battery capacity ratio is a ratio of a capacity of a large-capacity battery to a capacity of a small-capacity battery, and the path impedance ratio is a ratio of a resistance of the small-capacity battery to a resistance of the large-capacity battery.

6. The power supply device according to claim 5, wherein the preset value is 0.2-0.4.

7. The power supply apparatus according to any one of claims 1 to 6, wherein the power consumption of the battery on the non-target connection path is IQ, and the maximum desired voltage difference of at least two of said batteries is Δ V;

the resistance value of the equalizing resistor is less than or equal to the product of twice the power consumption IQ of the battery and the maximum expected pressure difference delta V.

8. The power supply device according to claim 1, wherein the current-limiting switching module includes a switching unit connected in parallel with the equalizing resistance.

9. The power supply device according to claim 8, wherein the switching unit is an MOS transistor, and the current-limiting switching module further includes a sensor for collecting a current of the MOS transistor and a voltage control unit; wherein the content of the first and second substances,

the voltage control unit comprises a comparator and a voltage converter, wherein the comparator is used for accessing the MOS tube current collected by the sensor and comparing the MOS tube current with a reference current to output a feedback signal to the voltage converter;

and the output end of the voltage converter is connected to the grid electrode of the MOS tube and is used for changing the current flowing through the MOS tube according to the feedback signal.

10. The power supply device according to claim 9, wherein the equalizing resistor is connected in parallel with the MOS transistor.

11. The power supply device according to claim 8, wherein the current-limiting switch module further comprises a current-detecting resistor, which is arranged in series with the switch unit, and is configured to detect and regulate a current flowing through the target connection path.

12. The power supply device according to claim 11, wherein the equalizing resistance is connected in series with the current detecting resistance.

13. An electric consumer, characterized in that it comprises a power supply device according to any one of claims 1-12.

14. The powered device of claim 13, wherein the powered device is a folding screen device; the first folding part of the electric equipment is provided with a power management module and a battery with a first capacity; the second folding part of the electric equipment is provided with a battery with a second capacity; the first capacity is less than the second capacity;

the current-limiting switch module and the balancing resistor of the power supply device are arranged on a connection circuit where the battery with the first capacity is located.

15. A control method of a power supply device, the power supply device comprises at least two batteries, a power supply management module and at least two connecting paths, the batteries are arranged in parallel, the power supply management module is used for controlling charging and discharging of the batteries, and the connecting paths are used for connecting the power supply management module and the batteries, and the method comprises the following steps:

arranging a current limiting switch module on at least part of a target connecting path, and controlling the target connecting path to be connected and disconnected through the current limiting switch module; the target connection path is a connection path meeting a preset condition;

and a balancing resistor is arranged on the current limiting switch module in parallel, so that when the current limiting switch module is switched off, the voltage difference between the at least two batteries is balanced through the balancing resistor.

16. An electronic device, comprising:

a processor;

a memory for storing one or more programs that, when executed by the processor, cause the processor to implement the control method of the power supply apparatus according to claim 15.