Power supply device, power-consuming device, control method and electronic device

Abstract

The present disclosure provides a power supply device, an electric device, a control method of the power supply device, and an electronic device, and relates to the field of battery technology. The power supply device, applied to the electric device, may include: at least two batteries, each of which is arranged in parallel; a power management module, used to control the charging and discharging of the battery; at least two connection paths, the connection paths are used to connect the power management module and the battery; a current limiting switch module, which is arranged on at least part of the target connection path, and is used to control the on and off of the target connection path, and the target connection path is a connection path that meets preset conditions; an equalizing resistor, which is arranged in parallel with the current limiting switch module, and is used to equalize the voltage difference between at least two batteries when the current limiting switch module is disconnected. The present disclosure can equalize the voltage between parallel batteries when the mobile phone is turned off.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a power supply device, an electric device, a control method for the power supply device, and an electronic device. Background Art

[0002] With the rapid development of foldable screen mobile phones, in order to increase the battery capacity, battery compartments are reserved under the screens on both sides of the foldable screen mobile phones for installing multiple batteries.

[0003] Due to the limited space available in the phone, the two battery compartments below the screen on both sides are usually different in size, resulting in different capacities of the two batteries. Batteries with different capacities usually need to be connected in parallel during charging.

[0004] However, batteries connected in parallel may suffer from uneven leakage current when the mobile phone is turned off for a long time. Summary of the invention

[0005] The present disclosure provides a power supply device, an electric device, a control method for the power supply device and an electronic device, thereby overcoming, at least to a certain extent, the problem of unbalanced leakage current between batteries arranged in parallel when a mobile phone is turned off for a long time.

[0006] According to a first aspect of the present disclosure, there is provided a power supply device, comprising: at least two batteries, each of which is arranged in parallel; a power management module, used to control the charging and discharging of the batteries; at least two connection paths, the connection paths are used to connect the power management module and the batteries; a current limiting switch module, arranged on at least part of the target connection path, used to control the on-off of the target connection path, the target connection path is a connection path that meets preset conditions; and a balancing resistor, arranged in parallel with the current limiting switch module, used to balance the voltage difference between the at least two batteries when the current limiting switch module is disconnected.

[0007] According to a second aspect of the present disclosure, there is provided an electrical device, comprising the above-mentioned power supply apparatus.

[0008] According to a third aspect of the present disclosure, a control method for a power supply device is provided, wherein the power supply device comprises at least two batteries, a power management module and at least two connection paths, wherein the batteries are arranged in parallel, the power management module is used to control the charging and discharging of the batteries, and the connection path is used to connect the power management module and the batteries, and the method comprises: setting a current limiting switch module on at least part of the target connection path, and controlling the on and off of the target connection path by the current limiting switch module; wherein the target connection path is a connection path that meets a preset condition; and setting an equalizing resistor in parallel with the current limiting switch module, so that when the current limiting switch module is disconnected, the voltage difference between the at least two batteries is equalized by the equalizing resistor.

[0009] According to a fourth aspect of the present disclosure, an electronic device is provided, comprising: a processor; and a memory for storing one or more programs, wherein when the one or more programs are executed by the processor, the processor implements the above-mentioned control method of the power supply device.

[0010] In the technical solutions provided by some embodiments of the present disclosure, on the one hand, by setting a current limiting switch module, and the current limiting switch module is set on at least part of the target connection path, during the charging process, if the charging rate of the battery on the target connection path is fast, the charging current on the target connection path can be limited by the current limiting switch module, and the target connection path can even be closed by the current limiting switch module, thereby slowing down the corresponding charging rate, so that each battery can be charged to saturation, and reducing the charging capacity loss between each battery. On the other hand, by connecting a balancing resistor in parallel to the current limiting switch module, when the electrical equipment is turned off and the current limiting switch module is disconnected, the battery on the target connection path can generate leakage current, thereby reducing the difference in power consumption with 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.

[0011] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0013] Figure 1 A schematic diagram of the structure of a power supply device according to an exemplary embodiment of the present disclosure is schematically shown;

[0014] Figure 2 A schematic diagram of the structure of a current limiting switch module according to an exemplary embodiment of the present disclosure is schematically shown;

[0015] Figure 3 A circuit diagram of a power supply device according to an exemplary embodiment of the present disclosure is schematically shown;

[0016] Figure 4 A circuit diagram schematically shows another power supply device according to an exemplary embodiment of the present disclosure;

[0017] Figure 5 A circuit diagram schematically shows another power supply device according to an exemplary embodiment of the present disclosure;

[0018] Figure 6 A schematic diagram of the structure of an electric device provided with a power supply device according to an exemplary embodiment of the present disclosure is schematically shown;

[0019] Figure 7 The figure schematically shows an internal structure diagram of an electric device according to an exemplary embodiment of the present disclosure;

[0020] Figure 8 A flowchart schematically illustrates a method for controlling a power supply device according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as being limited to the examples set forth herein; on the contrary, these embodiments are provided so that the present disclosure will be more comprehensive and complete, and the concepts of the example embodiments are fully conveyed to those skilled in the art. The described features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known technical solutions are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0022] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0023] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the steps. For example, some steps may be decomposed, while some steps may be combined or partially combined, so the actual execution order may change according to the actual situation. In addition, all the terms "first" and "second" below are only for the purpose of distinction and should not be used as limitations of the present disclosure.

[0024] The exemplary embodiment of the present disclosure provides a power supply device, which is applied to an electric device. In one embodiment, the electric device can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile Internet device (MID), a wearable device (such as a smart watch, a smart bracelet, a pedometer, etc.) or other electronic communication modules including the above power supply device.

[0025] Taking mobile phones as an example, in order to increase the battery capacity of mobile phones, some mobile phones are equipped with special-shaped battery compartments, which require the use of two batteries of different sizes and capacities. Alternatively, some folding screen mobile phones will have two batteries of different sizes and capacities under the screens on both sides.

[0026] For batteries of different capacities, since the charging current of the two batteries is the same when they are charged in series, it will cause the voltage of the two batteries to be unbalanced. Figure 1 In the power supply device 100 provided in the exemplary embodiment of the present disclosure, at least two batteries are provided, and the batteries are arranged in parallel. For batteries with different capacities, the problem of voltage imbalance between the batteries can be reduced by adopting a parallel arrangement. Figure 1 Two batteries are shown, including a first battery 111 and a second battery 112.

[0027] In practical applications, the battery may be a rechargeable battery, for example, a battery made of lithium material and nickel-hydrogen material or graphene material, etc. The exemplary embodiments of the present disclosure do not impose any particular limitation on the material of the battery.

[0028] 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 used to control the charging and discharging of the battery, and the connection path is used to connect the power management module 120 and the battery. For example, Figure 1 The first connection path 131 is used to connect the power management module 120 and the first battery 111. Through the first connection path 131, the power management module 120 controls the charging and discharging of the first battery 111; the second connection path 132 is used to connect the power management module 120 and the second battery 112. Through the second connection path 132, the power management module 120 controls the charging and discharging of the second battery 112.

[0029] In actual application, due to the different capacities of the batteries and the different impedances of the connecting paths, the charging losses during the charging process are different, so that when some batteries are saturated, other batteries are not fully charged, resulting in voltage imbalance between the batteries. The power supply device 100 provided in the exemplary embodiment of the present disclosure alleviates the above-mentioned imbalance problem between the batteries by providing a current limiting switch module 140 and a balancing resistor 150.

[0030] Specifically, the current limiting switch module 140 can be set on at least part of the target connection path, wherein the target connection path is a connection path that meets the preset conditions, and the current limiting switch module 140 is mainly used to control the on and off of the target connection path. During the charging process, if the charging rate of the battery on the target connection path is fast, the charging current on the target connection path can be limited by the current limiting switch module 140, and the target connection path can even be closed by the current limiting switch module 140, thereby slowing down the corresponding charging rate, so as to make each battery fully charged as much as possible, and reduce the charging capacity loss between the batteries.

[0031] In actual applications, when the electrical equipment is shut down for a long time, 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 electrical equipment, and its leakage current is very small; however, for the non-target connection path without the current limiting switch module 140, the battery thereon is not disconnected from the electrical equipment, and its leakage current is relatively large. Therefore, when the electrical equipment is shut down for a long time, the power consumption of the battery on the non-target connection path will be much greater than the power consumption of the battery on the target connection path, resulting in voltage imbalance between the two batteries, a large voltage difference, and even the inability to open the current limiting switch module 140.

[0032] by Figure 1For example, assuming that the connection path where the first battery 111 is located, that is, the first connection path 131 is a target connection path, on which a current limiting switch module 140 is set, when the power-consuming device is turned off, the current limiting switch module 140 is in a disconnected state, the first battery 111 is completely disconnected from the power management module 120, and the first battery 111 will not perform charging and discharging operations. The connection path where the second battery 112 is located is a non-target connection path, on which no current limiting switch module is set, and when the power-consuming device is turned off, the second battery 112 may need to supply a small amount of power to the system of the power-consuming device.

[0033] In order to balance the voltage difference between at least two batteries when the electrical device is shut down, a balancing resistor 150 is provided in parallel with the current limiting switch module 140. When the current limiting switch module 140 is in the disconnected state, the battery on the target connection path will also generate leakage current, thereby reducing the difference in power consumption with 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.

[0034] like Figure 1 In the embodiment, the balancing resistor 150 connected in parallel with the current limiting switch module 140 is connected in series with the first battery 111. When the electrical device is turned off and the current limiting switch module 140 is disconnected, the balancing resistor 150 can provide a path for the first battery 111 so that the first battery 111 has a small amount of leakage current to achieve a balance with the leakage current on the second battery 112, thereby reducing the imbalance between the first battery 111 and the second battery 112.

[0035] The power supply device provided by the exemplary embodiment of the present disclosure, on the one hand, by providing a current limiting switch module 140, and the current limiting switch module 140 is provided on at least part of the target connection path, so that during the charging process, if the charging rate of the battery on the target connection path is fast, the charging current on the target connection path can be limited by the current limiting switch module, and even the target connection path can be closed by the current limiting switch module 140, thereby slowing down the corresponding charging rate, so that each battery can be charged to saturation, and reducing the charging capacity loss between each battery. On the other hand, by connecting the equalizing resistor 150 in parallel to the current limiting switch module 140, when the electrical equipment is turned off and the current limiting switch module 140 is disconnected, the battery on the target connection path can generate leakage current, thereby reducing the difference in power consumption with 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.

[0036] In practical applications, in order to avoid imbalance caused by battery differences, path impedance of connection paths, battery aging and other factors, when multiple batteries are connected in parallel, current limiting switch modules 140 and corresponding balancing resistors 150 can be set on all connection paths, and current limiting switch modules 140 and corresponding balancing resistors 150 can also be set on some target connection paths, so that when the charging rates are different, timely feedback and adjustment of the charging current can be made to balance the batteries during the charging process.

[0037] In order to reduce costs, reduce heat loss caused by the current limiting switch module 140, and achieve 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, which can also achieve the purpose of balancing the battery voltage.

[0038] In addition, in the exemplary embodiment of the present disclosure, the current limiting switch module 140 and the corresponding balancing resistor 150 are arranged on all target connection paths, so that the voltage between the batteries can be balanced to the greatest extent while reducing the cost.

[0039] In practical applications, the target connection path may be a connection path that satisfies a preset condition, wherein the preset condition may be determined according to actual conditions. In the 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 to say, among the at least two connection paths mentioned above, except for the connection path with the largest path impedance, the remaining connection paths are all target connection paths. For example, there are three connection paths A, B, and C, among which the path impedance of connection path A is the largest, then connection paths B and C can be determined as target connection paths, and current limiting switch modules 140 and corresponding balancing resistors 150 are set on the target connection paths B and C.

[0040] In practical applications, if the path impedances of the connection paths are equal during the process of determining the target connection path, then the target connection path can be determined as the connection path where the battery of non-maximum capacity is located. In other words, the target connection path that meets the preset conditions can be the connection path where the battery of non-maximum capacity is located when the path impedances of the connection paths are equal. For example, assuming that the path impedances of the three connection paths A, B, and C are equal, and the battery capacity on the connection path B is the largest, then the connection paths A and C can be determined as the target connection paths, and the current limiting switch module 140 and the corresponding balancing resistor 150 can be set on the target connection paths A and C.

[0041] It should be noted that the power supply device provided in the exemplary embodiment of the present disclosure is also applicable to the case where the capacity of each battery is equal, but the path impedance of the connection path where the batteries are located is different. In this case, the target connection path can be determined as a connection path with a non-maximum path impedance, and a current limiting switch module 140 and a corresponding balancing resistor 150 can be set on the connection path with a non-maximum path impedance.

[0042] In practical applications, if the path impedance of the connection path where the large-capacity battery is located is small, then the current limiting switch module 140 may not be set. Based on this, the exemplary embodiment of the present disclosure further defines a condition for setting the current limiting switch module 140, that is, the current limiting switch module 140 is set when the difference between the battery capacity ratio and the path impedance ratio on any two connection paths is greater than a preset value. The battery capacity ratio is the capacity C of the large-capacity battery. 大 With the capacity of small capacity battery C 小 Ratio The path impedance ratio is the resistance R of the small capacity battery 小 The resistance R of the large capacity battery 大 Ratio

[0043] and,

[0044] In practical applications, the preset value can be determined according to actual conditions. For example, the preset value can be any value between 0.2 and 0.4, for example, 0.3. The exemplary embodiments of the present disclosure do not specifically limit the preset value.

[0045] It should be noted that as the battery ages, the difference between the battery capacity ratio and the path impedance ratio will gradually become greater than the preset value. Therefore, in order to improve the stability of the power supply device, if space permits, when the difference between the battery capacity ratio and the path impedance ratio is less than the preset value, a current limiting switch module 140 may be provided on at least part of the target connection path.

[0046] In practical applications, the balancing resistor 150 is mainly used to cause the battery on the target connection path to generate leakage current when the power-consuming device is turned off and the current-limiting switch module 140 is disconnected. The leakage current is mainly balanced with the leakage current of the battery on the non-target connection path. Since the leakage current itself is relatively small when the power-consuming device is turned off, the resistance value of the balancing resistor 150 provided in the exemplary embodiment of the present disclosure is relatively large, so as to generate a smaller leakage current on the target connection path.

[0047] Specifically, it can be determined based on the battery power consumption IQ on the non-target connection path, which is also the system power consumption of the power-consuming device in the shutdown state, and the maximum expected pressure difference ΔV of at least two batteries; wherein, when the number of batteries is greater than two, the maximum expected pressure difference ΔV can be the maximum value of the maximum expected pressure differences determined after comparing the two batteries. For example, assuming there are three batteries Battery1, Battery2, and Battery3, wherein the maximum expected pressure difference between Battery1 and Battery2 is ΔV1, the maximum expected pressure difference between Battery1 and Battery3 is ΔV2, the maximum expected pressure difference between Battery2 and Battery3 is ΔV3, and ΔV1 is the maximum value of the three maximum expected pressure differences ΔV1, ΔV2, and ΔV3, then ΔV1 is the above-mentioned maximum expected pressure difference ΔV.

[0048] In an exemplary embodiment of the present disclosure, the resistance of the balancing resistor 150 is less than the product of the battery power consumption IQ and the maximum expected voltage difference ΔV. Specifically, the resistance of the balancing resistor 150 may be less than or equal to twice the product of the battery power consumption IQ and the maximum expected voltage difference ΔV. For example, when the battery power consumption IQ = 1mA and the maximum expected voltage difference ΔV = 50mV, the resistance of the balancing resistor 150 is less than or equal to 100Ω.

[0049] In practical applications, since the resistance of the balancing resistor 150 is relatively large, the current passing through the balancing resistor 150 is relatively small, and the balancing resistor 150 will not be damaged. In addition, the balancing resistor 150 will not affect the distribution of the charging current by the current limiting switch module 140 when the current limiting switch module 140 is turned on. For example, when the resistance of the balancing resistor 150 is equal to 100Ω, 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 passing through the balancing resistor 150 is Imax=(4.5V-0V) / 100Ω=45mA, which is relatively small and has little effect on the normal distribution of the charging current.

[0050] In practical applications, the rated power of the balancing resistor 150 can be determined according to actual conditions. For example, in the above example, the power consumption P of the balancing resistor 150 is P=△Vmax*Imax=0.2025W. Therefore, the rated power of the balancing resistor can be set to any value between 0.3W-0.5W, for example, 0.5W. The exemplary embodiments of the present disclosure are not particularly limited to this.

[0051] In practical applications, the structure of the current limiting switch module 140 can be set according to specific needs, for example, Figure 2 The above-mentioned 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-mentioned purpose.

[0052] In an optional implementation of the embodiment of the present disclosure, the switch unit 141 may be a MOS tube. In addition to the switch unit 141, the current limiting switch module 140 may also include a sensor 142 for collecting the MOS tube current and a voltage control unit; wherein the voltage control unit may include a comparator 143 and a voltage converter 144, and the comparator 143 may be used to access the MOS tube current collected by the sensor 142, and compare the above MOS tube current with the reference current V REF In contrast, a feedback signal is output to the voltage converter 144; the output end of the voltage converter 144 is connected to the gate of the MOS tube, which is used to change the current flowing through the MOS tube according to the feedback signal, thereby achieving the purpose of changing the charging current on the target connection path.

[0053] In order to achieve the above-mentioned purpose of balancing the voltage between the two batteries when the power-consuming device is turned off and the current limiting switch module 140 is disconnected, in the exemplary embodiment of the present disclosure, Figure 2 As shown, the balancing resistor 150 is connected in parallel at both ends of the MOS tube. When the MOS tube is disconnected, a small amount of leakage current is provided to the battery on the target connection path to balance the leakage current of the battery on the non-target connection path.

[0054] Reference Figure 3 , shows a circuit diagram of a power supply device corresponding to an exemplary embodiment of the present disclosure. Among them, Figure 3 The power supply device shown can be arranged on an electrical device with a folding screen, wherein two batteries 410 are arranged in parallel, wherein one battery 410 is arranged on a target connection path 420, on which a current limiting switch module 140 and a balancing resistor 150 are arranged; and the other battery 410 is arranged on a non-target connection path 430, on which a flexible circuit board 440 is also arranged, and the path impedance of the non-target connection path 430 is greater than the path impedance of the target connection path 420.

[0055] in addition, Figure 3 The power management module 120 in the power supply device shown in the figure includes a voltage detection unit 121 and a current detection unit 122, wherein the voltage detection unit 121 and the current detection unit 122 are used to measure the total current and the total voltage of the two batteries 410 respectively. The specific configuration of the voltage detection unit 121 and the current detection unit 122 can be referred to in Figure 3 , which will not be elaborated here.

[0056] In addition to the above-mentioned structure of the current limiting switch module 140, Figure 4As shown, the current limiting switch module 140 can be a load switch, which can include a current sensing resistor 510 and the above-mentioned switch unit 141. The balancing resistor 150 can be arranged in parallel only at both ends of the switch unit 141, and connected in series with the current sensing resistor 510, so that the above-mentioned folding screen device 600 can be shut down. When the switch unit 141 is disconnected, the current sensing resistor 510 and the balancing resistor 150 together produce a leakage current. Since the current sensing resistor 510 can also adjust the size of the leakage current according to the detected current result, the purpose of intelligently adjusting the leakage current on the target connection path is achieved, and then the difference in power consumption between the batteries can be more flexibly adjusted, so that the adjustment effect is better.

[0057] from Figure 3 and Figure 4 It can be seen from the circuit diagram shown that at least one protection circuit 450 is arranged in parallel on each of the two batteries 410, and the current limiting switch 451 of the protection circuit 450 is arranged on the connection path. Therefore, in the exemplary embodiment of the present disclosure, the current limiting switch 451 of the protection circuit 450 can also be used as the current limiting switch module 140, that is, the purpose of current limiting protection is achieved directly through the current limiting switch 451 of the protection circuit 450. Therefore, the balancing resistor 150 can be directly connected in parallel to the current limiting switch 451, so that when the electrical equipment is turned off and the current limiting switch 451 is disconnected, the voltage between the two batteries is balanced. For specific settings, please refer to Figure 5 .

[0058] exist Figure 5 In the embodiment, the number of balancing resistors 150 is determined by the number of current limiting switches 451, that is, by the number of protection circuits 450. Usually, a balancing resistor 150 is connected in parallel to the current limiting switch 451 of each protection circuit 450 on the target connection path.

[0059] It should be noted that the various modules of the above power supply device can be implemented in whole or in part by software, hardware, or a combination thereof. The above modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to the above modules.

[0060] The exemplary embodiment of the present disclosure further provides an electrical device, which includes the above-mentioned power supply device, wherein the specific setting method and working principle of the power supply device have been described in detail in the above-mentioned embodiment and will not be repeated here.

[0061] In an exemplary implementation of the present disclosure, the power-consuming device may be a folding screen device. Figure 6, an example is given in which the power supply device 100 is provided in a folding screen device 600 having a folding screen. 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.

[0062] In the folding screen device 600, compared with the first battery 111 and the second battery 112, the first battery 111 is closer to the power management module 120, and the charging chip is generally arranged in the power management module 120, so the path impedance of the first battery 111 is smaller. The second battery 112 is not only far away from the charging chip, but also may be provided with a flexible circuit board path, so 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, so the current limiting switch module 140 and the balancing resistor 150 can be arranged on the connection path where the first battery 111 with the first capacity is located.

[0063] Since the capacity of the first battery 111 is smaller than that of the second battery 112, and the path impedance of the connection path where the first battery 111 is located is relatively small, therefore, during the charging process, if the charging current of the connection path where the first battery 111 is located is greater than the reference current, the charging current of the first battery 111 can be reduced by the current limiting switch module 140 to ensure that the first battery 111 and the second battery 112 can reach the saturated state of charge at the same time. If, after current limiting, the first battery 111 still reaches the saturated state of charge faster than the second battery 112, the current limiting switch module 140 can be disconnected when the first battery 111 reaches the saturated state of charge, and only the second battery 112 is charged to make the second battery 112 reach the saturated state of charge, thereby minimizing the loss of charging capacity.

[0064] In addition, when the above-mentioned folding screen device 600 is turned off, the balancing resistor 150 connected in parallel with the current limiting switch module 140 can cause the first battery 111 to continue to generate leakage current when the current limiting switch module 140 is disconnected, thereby reducing the difference in power consumption with the second battery 112, thereby achieving the purpose of balancing the voltage between the two batteries and reducing the voltage difference.

[0065] Figure 7 The figure shows a schematic diagram of the internal structure of an electric device suitable for applying the exemplary embodiment of the present disclosure. It should be noted that: Figure 7 The electrical equipment shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0066] The power-consuming device disclosed in the present invention includes at least a processor and a memory, and the memory is used to store one or more programs. The power-consuming device can be any terminal device such as a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), a vehicle-mounted computer, a wearable device, etc.

[0067] Specifically, Figure 7 As shown, the power-consuming device 700 may include: 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 screen 790, a camera module 791, an indicator 792, a motor 793, a button 794, a Subscriber Identification Module (SIM) card interface 795 and the above-mentioned power supply device 100, etc. 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, and a bone conduction sensor, etc.

[0068] It is understood that the structure illustrated in the embodiment of the present disclosure does not constitute a specific limitation on the electric device 700. In other embodiments of the present disclosure, the electric device 700 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0069] The processor 710 may include one or more processing units, for example, the processor 710 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor and / or a neural network processor (NPU). Different processing units may be independent devices or integrated into one or more processors. In addition, a memory may be provided in the processor 710 for storing instructions and data.

[0070] The power-consuming device 700 can realize audio and video playback functions through the ISP, video codec, GPU, display screen 790, speaker 771 and application processor, etc. When realizing the above functions, the power supply device provided in the exemplary embodiment of the present disclosure is required to supply power.

[0071] In addition, the exemplary embodiment of the present disclosure also provides a control method for a power supply device, which is applied to a power supply device, wherein the power supply device includes at least two batteries, a power management module, and at least two connection paths, wherein the batteries are arranged in parallel, the power management module is used to control the charging and discharging of the batteries, and the connection paths are used to connect the power management module and the batteries. Figure 8 As shown, the control method of the power supply device may include:

[0072] Step S810: Setting a current limiting switch module on at least part of the target connection path, and controlling the on-off of the target connection path by the current limiting switch module; wherein the target connection path is a connection path that meets a preset condition.

[0073] In the actual charging process, if the charging rate of the battery on the target connection path is fast, the charging current on the target connection path can be limited by the current limiting switch module, and the target connection path can even be closed by the current limiting switch module, thereby slowing down the corresponding charging rate, so as to make each battery as fully charged as possible and reduce the charging capacity loss between the batteries.

[0074] Step S820: A balancing resistor is connected in parallel to the current limiting switch module, so that when the current limiting switch module is disconnected, the voltage difference between at least two batteries is balanced through the balancing resistor.

[0075] In order to balance the voltage difference between at least two batteries when the electrical equipment is shut down, a balancing resistor is set in parallel with the current limiting switch module. When the current limiting switch module is in the disconnected state, the battery on the target connection path will also generate leakage current, thereby reducing the difference in power consumption with 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.

[0076] Among them, regarding the preset conditions that the target connection path must meet, as well as the setting method and control method of the current limiting switch module and the balancing resistor, reference can be made to the above-mentioned embodiments, which will not be repeated here.

[0077] Accordingly, the exemplary embodiment of the present disclosure also provides an electronic device, which includes a processor and a memory connected via a system bus. The processor is used to provide computing and control capabilities to support the operation of the entire electronic device. 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 can be executed by the processor to implement a control method for a power supply device provided in each of the following embodiments. For example, the processor can execute the following Figure 8 The step S810 shown is to set a current limiting switch module on at least part of the target connection path, and control the on and off of the target connection path through the current limiting switch module; wherein the target connection path is a connection path that meets a preset condition; and the step S820 is to set a balancing resistor in parallel with the current limiting switch module, so that when the current limiting switch module is disconnected, the voltage difference between at least two batteries is balanced through the balancing resistor.

[0078] The computer program can be run on a terminal or a server. The program modules constituted by the computer program can be stored in the memory of the electronic device. When the computer program is executed by the processor, the steps of the method described in the exemplary embodiment of the present disclosure are implemented.

[0079] The exemplary embodiment of the present disclosure discloses a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of a control method for a power supply device are implemented as follows:

[0080] A computer program product comprising instructions, when executed on a computer, causes the computer to execute the above method.

[0081] Any reference to memory, storage, database or other medium used in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM), which is used as an external cache memory. As an illustration and not limitation, RAM is available in many 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), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0082] Any reference to memory, storage, database or other medium used in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM), which is used as an external cache memory. As an illustration and not limitation, RAM is available in many 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), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0083] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A power supply device, characterized in that: include: At least two batteries, each of which is arranged in parallel; A power management module, used to control the charging and discharging of the battery; at least two connection paths, the connection paths being used to connect the power management module and the battery; A current limiting switch module is provided on at least part of the target connection path, and is used to control the on-off of the target connection path, wherein the target connection path is a connection path that satisfies a preset condition; the connection path that satisfies the preset condition is a connection path where a battery other than the maximum capacity is located when the path impedances of the connection paths are equal; the current limiting switch module is provided when the difference between the battery capacity ratio and the path impedance ratio on any two of the connection paths is greater than a preset value; wherein the battery capacity ratio is the ratio of the capacity of a large-capacity battery to the capacity of a small-capacity battery, and the path impedance ratio is the ratio of the resistance of a small-capacity battery to the resistance of a large-capacity battery; A balancing resistor is arranged in parallel with the current limiting switch module, and is used to balance 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, characterized in that: The current limiting switch module and the corresponding balancing resistor are arranged on all the target connection paths.

3. The power supply device according to claim 1, characterized in that: The connection path that meets the preset condition is a connection path whose path impedance is not the maximum path impedance.

4. The power supply device according to claim 1, characterized in that: The preset value is 0.2-0.

4.

5. The power supply device according to any one of claims 1 to 4, characterized in that: The power consumption of the battery on the non-target connection path is IQ, and the maximum expected voltage difference between at least two of the batteries is ΔV; The resistance of the balancing resistor is less than or equal to twice the product of the battery power consumption IQ and the maximum expected voltage difference ΔV.

6. The power supply device according to claim 1, characterized in that: The current limiting switch module comprises a switch unit, and the switch unit is connected in parallel with the balancing resistor.

7. The power supply device according to claim 6, characterized in that: The switch unit is a MOS tube, and the current limiting switch module also includes a sensor for collecting the current of the MOS tube and a voltage control unit; wherein, The voltage control unit includes a comparator and a voltage converter, wherein the comparator is used to access the MOS tube current collected by the sensor, and compare the MOS tube current with a reference current to output a feedback signal to the voltage converter; The output end of the voltage converter is connected to the gate of the MOS tube, and is used to change the current flowing through the MOS tube according to the feedback signal.

8. The power supply device according to claim 7, characterized in that: The balancing resistor is connected in parallel with the MOS tube.

9. The power supply device according to claim 6, characterized in that: The current limiting switch module further includes a current sensing resistor, which is arranged in series with the switch unit and is used to detect and adjust the current flowing through the target connection path.

10. The power supply device according to claim 9, characterized in that: The balancing resistor is connected in series with the current sensing resistor.

11. An electrical device, characterized in that: The invention comprises a power supply device as claimed in any one of claims 1 to 10.

12. The electrical equipment according to claim 11, characterized in that: The electric device is a folding screen device; the first folding portion of the electric device is provided with a power management module and a battery with a first capacity; the second folding portion of the electric device is provided with a battery with a second capacity; The first capacity is smaller than the second capacity; The current limiting switch module and the balancing resistor of the power supply device are arranged on the connection path where the battery with the first capacity is located.

13. A control method for a power supply device, the power supply device comprising 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 used to control the charging and discharging of the batteries, the connection paths being used to connect the power management module and the batteries, characterized in that: The method comprises: A current limiting switch module is provided on at least part of the target connection path, and the target connection path is controlled to be on and off by the current limiting switch module; wherein the target connection path is a connection path that satisfies a preset condition; the connection path that satisfies the preset condition is a connection path where a battery other than the maximum capacity is located when the path impedances of the connection paths are equal; the current limiting switch module is provided when the difference between the battery capacity ratio and the path impedance ratio on any two of the connection paths is greater than a preset value; wherein the battery capacity ratio is the ratio of the capacity of a large-capacity battery to the capacity of a small-capacity battery, and the path impedance ratio is the ratio of the resistance of a small-capacity battery to the resistance of a large-capacity battery; A balancing resistor is connected in parallel to the current limiting switch module, so that when the current limiting switch module is disconnected, the voltage difference between the at least two batteries is balanced through the balancing resistor.

14. An electronic device, characterized in that: include: processor; A memory for storing one or more programs, which, when executed by the processor, enables the processor to implement the control method of the power supply device according to claim 13.

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