Power collection device and electronic equipment

Abstract

The application discloses a power collection device and electronic equipment, and relates to the technical field of batteries, and is applied to electronic equipment. A positive electrode of a first battery is connected with a power supply positive electrode end, and a negative electrode of the first battery is connected with a positive electrode of a second battery through a target circuit board. A negative electrode of the second battery is connected with a ground end and a power supply negative electrode end respectively. The power collection device comprises a differential operational amplifier module, a first input end of the differential operational amplifier module is connected with the positive electrode of the first battery, a second input end of the differential operational amplifier module is connected with the negative electrode of the first battery, and a voltage difference between voltages collected by the first input end and the second input end is input into a first power meter. The first power meter determines the power of the first battery based on the voltage difference. A second power meter collects the power of the second battery. Therefore, the application can accurately obtain the power of the two batteries in the case that there is impedance interference of the target circuit board between the first battery and the second battery, and provide accurate reference power for subsequent power adjustment operations.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a power acquisition device and electronic device. Background Technology

[0002] Foldable phones typically consist of two foldable casings, each housing a battery. This makes charging control relatively complex. Most manufacturers use parallel charging or power supply for the two batteries, but this method is also complex and limits charging power. Therefore, to overcome this limitation, a series charging or power supply scheme is adopted. To accurately control charging efficiency in this series charging or power supply configuration, it is necessary to accurately measure the charge levels of both batteries. Summary of the Invention

[0003] This application proposes a power acquisition device and electronic device to improve the above-mentioned defects.

[0004] In a first aspect, embodiments of this application provide a power acquisition device applied to an electronic device. The electronic device includes a power supply module, which includes a positive power supply terminal, a negative power supply terminal, and a first battery and a second battery connected in series. The positive terminal of the first battery is connected to the positive power supply terminal, and the negative terminal is connected to the positive terminal of the second battery through a target circuit board. The negative terminal of the second battery is connected to a ground terminal and the negative power supply terminal. The power acquisition device includes: a differential operational amplifier module, the first input terminal of which is connected to the positive terminal of the first battery, and the second input terminal of which is connected to the negative terminal of the first battery, for inputting the voltage difference between the voltages acquired by the first input terminal and the second input terminal into a first fuel gauge; a first fuel gauge connected to the output terminal of the differential operational amplifier module, for acquiring the voltage difference and determining the power of the first battery based on the voltage difference; and a second fuel gauge connected across the positive and negative terminals of the second battery, for acquiring the power of the second battery.

[0005] Secondly, embodiments of this application provide an electronic device, including a power supply module, the power supply module including a positive power supply terminal, a negative power supply terminal, a first battery and a second battery connected in series, and the aforementioned power acquisition device.

[0006] The power acquisition device and electronic device provided in this application include a power supply module, which includes a positive power supply terminal, a negative power supply terminal, and a first battery and a second battery connected in series. The positive terminal of the first battery is connected to the positive power supply terminal, and the negative terminal is connected to the positive terminal of the second battery through a target circuit board. The negative terminal of the second battery is connected to a ground terminal and the negative power supply terminal. The power acquisition device includes a differential operational amplifier module, a first fuel gauge, and a second fuel gauge. The voltage difference between the positive and negative terminals of the first battery is obtained through the differential operational amplifier module. Based on this voltage difference, the first fuel gauge can accurately obtain the power of the first battery. Therefore, in the embodiments of this application, the power of the two batteries can be accurately obtained even when there is impedance interference from the target circuit board between the first battery and the second battery, providing an accurate reference power for subsequent power adjustment operations.

[0007] Other features and advantages of the embodiments of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the embodiments of this application. The objects and other advantages of the embodiments of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 A schematic diagram of the stacked state of a foldable screen terminal provided in an embodiment of this application is shown;

[0010] Figure 2 A schematic diagram of the unfolded state of a foldable screen terminal according to an embodiment of this application is shown;

[0011] Figure 3 A schematic diagram of the structure of a foldable screen terminal with dual batteries according to an embodiment of this application is shown;

[0012] Figure 4 A schematic diagram showing the connection relationship between a first battery and a second battery according to an embodiment of this application is shown;

[0013] Figure 5 A schematic diagram of a power collection method for a candybar mobile phone according to an embodiment of this application is shown;

[0014] Figure 6 A block diagram of a power acquisition device according to an embodiment of this application is shown;

[0015] Figure 7 A schematic diagram of the structure of a foldable screen terminal with dual batteries according to another embodiment of this application is shown;

[0016] Figure 8 A module block diagram of a power acquisition device according to another embodiment of this application is shown;

[0017] Figure 9 A flowchart of a power optimization method provided in an embodiment of this application is shown;

[0018] Figure 10 A flowchart of a battery optimization strategy provided in an embodiment of this application is shown;

[0019] Figure 11 A block diagram of an electronic device provided in an embodiment of this application is shown. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. The components of the embodiments of the present application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0021] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] With the development of science and technology, electronic devices are becoming increasingly widespread and multifunctional, becoming an essential part of people's daily lives. Electronic devices typically have a screen, which can be a touchscreen, used to display content and receive user input gestures. Based on the different materials and structures of the screen, electronic devices can be divided into single-sided screen terminals, double-sided screen terminals, and foldable screen terminals. Foldable screen terminals use flexible displays, with hinges and other hardware structures enabling the screen to switch between unfolded and folded states. In related technologies, electronic devices with foldable screens can be in either a folded or unfolded state. When unfolded, the foldable screen can have multiple display areas, displaying content through these areas; in this case, the overall touchscreen size is relatively large.

[0023] like Figure 1 As shown, the electronic device 20 is a foldable screen terminal, which may include a foldable housing assembly 110, a flexible display screen 120, and electronic components (not shown in the figure). The electronic components are disposed within the foldable housing assembly 110, and the flexible display screen 120 is laid on the foldable housing assembly 110. The foldable housing assembly 110 is used to support the flexible display screen 120 and protect the electronic components. The electronic components may include, but are not limited to, a central processing unit, memory, camera, receiver, fingerprint module, etc., and the specific electronic components are not limited in this embodiment.

[0024] The foldable housing assembly 110 includes a first housing 111, a second housing 112, and a pivot mechanism 113. The first housing 111 and the second housing 112 are respectively connected to both sides of the pivot mechanism 113. The second housing 112 can be folded or unfolded relative to the first housing 111 via the pivot mechanism 113, causing the foldable housing assembly 110 to drive the flexible display screen 120 to fold or unfold. When the foldable housing assembly 110 and the flexible display screen 120 are stacked, the electronic device 100 is relatively small in size, making it easy to store and carry. When the foldable housing assembly 110 and the flexible display screen 120 are unfolded, the electronic device 100 is relatively large in size, making it easier to display information.

[0025] Please see Figure 2In this embodiment, the flexible display screen 120 includes a first display portion 121 connected to a first housing 111, a second display portion 122 connected to a second housing 112, and a bent display portion 123 connected to the first display portion 121 and the second display portion 122. The first display portion 121, the second display portion 122, and the bent display portion 123 can correspondingly form multiple display areas (e.g., two display areas, three display areas, four display areas, ..., N display areas). The first display portion 121 and the second display portion 122 are folded or unfolded relative to the first housing 111 and the second housing 112, respectively. The bent display portion 123 is bent or flattened along with the folding or unfolding of the first display portion 121 and the second display portion 122. In some embodiments, the first display unit 121, the second display unit 122, and the bent display unit 123 can be an integral structure, making the flexible display screen 120 a single piece of flexible display screen; or, in other embodiments, the bent display unit 123 is a flexible portion that can be bent, while the first display unit 121 and the second display unit 122 can be non-flexible portions, and the first display unit 121 and the second display unit 122 are folded or unfolded relative to each other through the bent display unit 123. In this embodiment, when the first housing 111 and the second housing 112 are stacked, the first display unit 121 and the second display unit 122 are opposite to each other, making the electronic device 100 present an outward-folding screen structure, so that the user can still observe the display content of the flexible display screen 120 when it is folded, improving the convenience of using the electronic device 100. In some other embodiments, when the first housing 111 and the second housing 112 are stacked, the first display 121 and the second display 122 are close to each other, so that the electronic device 100 presents an inward folding screen structure, so as to protect the flexible display screen 120 from scratches and damage.

[0026] It should be understood that the names of the first display unit 121, the second display unit 122, and the bent display unit 123 are provided for ease of description only and are not intended to limit the structure of the flexible display screen 120. In actual application scenarios, the first display unit 121, the second display unit 122, and the bent display unit 123 may not have clear boundaries, or the flexible display screen 120 may appear in other dividing structures. For example, the flexible display screen 120 includes a first display unit 121 and a second display unit 122 connected to the first display unit 121, and the first display unit 121 and the second display unit 122 can rotate relative to each other to fold or unfold.

[0027] In addition, such as Figure 3As shown, the foldable screen terminal may include at least two batteries, namely a first battery 301 and a second battery 302. The first battery 301 is disposed within a first housing 111, and the second battery 302 is disposed within a second housing 112. The first battery 301 and the second battery 302 are connected in series to power a power-consuming component 303 of the electronic device. This power-consuming component 303 may include the electronic device's central processing unit, memory, camera, receiver, fingerprint module, and other aforementioned electronic components. Since the first battery 301 and the second battery 302 are located in different housings, and considering the rotation between the two housings, the two batteries are connected by a flexible circuit board. Specifically, as shown... Figure 4 As shown, a flexible circuit board FPC1 is provided between the first battery BT1 and the second battery BT2. In addition, the electronic device also includes a flexible circuit board FPC2. Both the flexible circuit board FPC1 and the flexible circuit board FPC2 are arranged through the shaft, so that when the first housing and the second housing rotate, the connection between the two batteries and the connection between the batteries and the electronic components can also adapt to the rotation between the two housings.

[0028] Currently, considering the adjustment of charging efficiency and charging time for electronic devices, it is necessary to accurately collect the power levels of both batteries. Then, through algorithmic processing, the charging, power levels, and battery balancing of the electronic device can be controlled. Specifically, the appropriate charging current and switching voltage levels are calculated to achieve precise control of charging and power levels. Currently, for foldable screen terminals, the charging adjustment scheme of traditional smartphones is still used. That is, the method of collecting the power levels of the two batteries is still the same as that used for traditional smartphones. Specifically, this refers to a non-foldable screen phone, where the two batteries can be connected in series via wires. Figure 5 As shown, the voltage at the positive terminal of the first battery BT1, the voltage at the negative terminal of the second battery BT2, and the voltage between the negative terminal of the first battery BT1 and the positive terminal of the second battery BT2 are collected. Specifically, as shown... Figure 5 As shown, VC2, VSS, and VC1 correspond to the three voltages mentioned above. After obtaining the voltages, the charge of the two batteries can be determined based on the voltages.

[0029] Then, the inventors discovered during their research that in the process of collecting voltage data from a dual-cell battery in a candybar phone, the impedance between the negative terminal of the first battery BT1 and the positive terminal of the second battery BT2 is very small and negligible due to the absence of a through-axis FPC. In other words, the voltage between the negative terminal of the first battery BT1 and the positive terminal of the second battery BT2 does not change with the current. Therefore, current power meter chips can accurately collect the voltage between the negative terminal of the first battery BT1 and the positive terminal of the second battery BT2. However, for foldable phones, because there is a through-axis FPC between the negative terminal of the first battery BT1 and the positive terminal of the second battery BT2, the collected voltage between these terminals changes with the current. Therefore, current power measurement methods cannot accurately collect the voltage values ​​of the first battery BT1 and the second battery BT2. Since battery voltage is strongly correlated with charging control, power calculation, and battery balancing, inaccurate voltage collection will affect charging time. Furthermore, due to the FPC impedance, some energy is consumed during charging, reducing charging efficiency.

[0030] To overcome the above-mentioned defects, this application provides a power acquisition device and an electronic device that can calculate the power of each of the two batteries connected in series, so as to accurately control the charging efficiency and charging time of the two batteries.

[0031] Specifically, such as Figure 6 As shown, this application embodiment provides a power acquisition device, which is applied to the aforementioned electronic device. The electronic device may include a power supply module comprising: a positive power supply terminal V1, a negative power supply terminal V2, and a first battery BT1 and a second battery BT2 connected in series. The positive terminal b11 of the first battery BT1 is connected to the positive power supply terminal V1, and the negative terminal b12 is connected to the positive terminal b21 of the second battery BT2 via a target circuit board. The power acquisition device includes: a differential operational amplifier module 610, a first fuel gauge 620, and a second fuel gauge 630. The positive power supply terminal V1 and the negative power supply terminal V2 serve as two voltage output terminals of the battery pack composed of the first battery BT1 and the second battery BT2 connected in series, outputting positive and negative voltages respectively. The positive power supply terminal V1 and the negative power supply terminal V2 together supply power to the electrical load, which can be various active electronic devices, and is not limited here.

[0032] The first input terminal 611 of the differential operational amplifier module 610 is connected to the positive terminal b11 of the first battery BT1, and the second input terminal 612 of the differential operational amplifier module 610 is connected to the negative terminal b12 of the first battery BT1. The differential operational amplifier module 610 is used to input the voltage difference between the voltages collected by the first input terminal 611 and the second input terminal 612 into the first fuel gauge. Specifically, the voltage difference between the voltage collected by the first input terminal 611 and the second input terminal 612 of the differential operational amplifier module 610 is the voltage difference between the positive terminal b11 and the negative terminal b12 of the first battery BT1, that is, the voltage of the first battery BT1. The differential operational amplifier module 610 can be a differential amplifier with a gain of 1.

[0033] The first fuel gauge 620 is connected to the output terminal of the differential operational amplifier module 610 and is used to acquire the voltage difference and determine the charge of the first battery BT1 based on the voltage difference. Specifically, the first fuel gauge 620 can estimate the state of charge (SOC) of the battery based on the difference between the battery terminal voltage and the open-circuit voltage, and then calculate the charge of the first battery BT1. The second fuel gauge 630 is connected across the positive terminal b21 and the negative terminal b22 of the second battery BT2 and is used to acquire the charge of the first battery BT1. Specifically, the second fuel gauge 630 acquires the voltage output from the positive terminal b21 and the voltage from the negative terminal b22 of the second battery BT2, calculates the voltage difference between the two to obtain the output voltage of the second battery BT2, and then determines the charge of the second battery BT2 according to the aforementioned method of acquiring the charge. Both the first fuel gauge 620 and the second fuel gauge 630 can be fuel gauge chips.

[0034] It is understandable that, since the negative terminal b12 of the first battery BT1 is connected to the positive terminal b21 of the second battery BT2 through the target circuit board, the resistance between the negative terminal b12 of the first battery BT1 and the positive terminal b21 of the second battery BT2 cannot be ignored. This is because the resistance of the target circuit board is not equivalent to the resistance of the wire; compared to the resistance of the wire, the resistance of the target circuit board is larger. Therefore, when the negative terminal b12 of the first battery BT1 is connected to the positive terminal b21 of the second battery BT2 through the target circuit board, the resistance between the negative terminal b12 of the first battery BT1 and the positive terminal b21 of the second battery BT2 is negligible. The positive terminals b21 are connected via a resistor. This means that the target circuit board effectively draws a portion of the voltage from both the first battery BT1 and the second battery BT2. Furthermore, as the current in the circuit increases, the voltage of the target circuit board gradually increases. Therefore, if the method used in traditional smartphones to determine the voltage of the two batteries is directly applied, the voltage division by the target circuit board cannot accurately determine its voltage, thus making it impossible to accurately obtain the individual voltages of the two batteries and consequently, their charge levels. However, in this embodiment, the differential operational amplifier module can accurately obtain the voltage difference between the positive terminal b11 and the negative terminal b12 of the first battery BT1, thereby determining the voltage of the first battery BT1. Even with impedance interference from the target circuit board between the first battery BT1 and the second battery BT2, the charge levels of both batteries can be accurately obtained, providing an accurate reference charge level for subsequent charge adjustment operations.

[0035] It should be noted that the target circuit board in this application embodiment can be the aforementioned flexible circuit board of the folding terminal, or other circuit boards. In other words, this application embodiment is also applicable to two batteries connected in series to supply power to the electrical load, and the two batteries are not connected by wires but by a circuit board. The circuit board can be a flexible circuit board or a non-flexible circuit board. The specific application scenario is not limited in this application embodiment.

[0036] As one implementation, the target circuit board can be the aforementioned flexible circuit board. Specifically, the electronic device further includes a first screen and a second screen rotatably connected, with a first flexible circuit board and a second flexible circuit board disposed between the first screen and the second screen. The target circuit board is the first flexible circuit board, and the negative power supply terminal is connected to the ground terminal through the second flexible circuit board. Specifically, as... Figure 6 The negative terminal V2 of the power supply is connected in series with the second flexible circuit board FPC2 and connected to the ground terminal GND. The negative terminal b12 of the first battery BT1 and the positive terminal b21 of the second battery BT2 are connected through the first flexible circuit board FPC1. Figure 7As shown, the first flexible circuit board FPC1 and the second flexible circuit board FPC2 can be through-axis flexible circuit boards, that is, both the first flexible circuit board FPC1 and the second flexible circuit board FPC2 pass through the rotation axis between the first housing and the second housing. For example, the first battery BT1 is disposed in the first housing, the second battery BT2 is disposed in the second housing, and the electrical load is also disposed in the first housing. Therefore, the positive power supply terminal V1 and the negative power supply terminal V2 are both located in the first housing. This electrical load can be the aforementioned electronic component.

[0037] In one implementation, the positive voltage terminal 621 of the first fuel gauge 620 is connected to the output terminal 613 of the differential operational amplifier module 610. The first input terminal 611 of the differential operational amplifier module 610 is connected to the positive terminal b11 of the first battery BT1, and the second input terminal 612 of the differential operational amplifier module 610 is connected to the positive terminal b12 of the first battery BT1. The ground terminal of the first fuel gauge 620 is connected to the negative terminal V2 of the power supply. It can be seen that a second flexible circuit board FPC2 is connected between the negative terminal V2 of the power supply and the ground terminal GND. Therefore, the voltage of the negative terminal V2 of the power supply is not equivalent to the voltage of the ground terminal GND. Therefore, if the differential operational amplifier 610 is not set, the output voltage of the first battery BT1 cannot be accurately obtained by using only the first fuel gauge 620 across the positive and negative terminals of the first battery BT1, and thus the charge of the first battery BT1 cannot be accurately obtained. However, if the ground terminal of the first fuel gauge 620 is connected to the negative terminal V2 of the power supply, and combined with the differential operational amplifier 610, the interference of the two flexible circuit boards can be subtracted from the voltage output from the positive terminal b11 of the first battery BT1, thereby obtaining the fuel level of the first battery BT1 more accurately. In other words, since the negative terminal b12 of the first battery BT1 and the positive terminal b21 of the second battery BT2 are connected through the first flexible circuit board FPC1, the voltage of the negative terminal b12 of the first battery BT1 is not equivalent to the voltage of the ground terminal GND. Because the negative power supply terminal V2 and the ground terminal GND are connected through the second flexible circuit board FPC2, the ground terminal of the first fuel gauge 620 is connected to the negative power supply terminal V2. In fact, for the first fuel gauge 620, the negative power supply terminal V2 is equivalent to ground. Assuming the voltage of the positive terminal b11 of the first battery BT1 is v11 and the voltage of the negative terminal b12 of the first battery BT1 is v12', then v12' should actually be the sum of the voltage of the first flexible circuit board FPC1 and the voltage of the ground terminal GND. For the first fuel gauge 620, the voltage of the first battery BT1 is obtained as follows: the voltage difference obtained by the differential operational amplifier module 610 is the difference between v11 and v12'. The voltage collected by the ground terminal of the first fuel gauge 620 is the sum of the voltage of the second flexible circuit board FPC2 and the voltage of the ground terminal GND. Then, the voltage of the ground terminal GND is regarded as 0. Assuming that the voltage of the first flexible circuit board FPC1 and the resistance of the second flexible circuit board FPC2 are the same, the voltage of the first flexible circuit board FPC1 and the voltage of the second flexible circuit board FPC2 are the same. Then, subtracting the voltage difference from the voltage collected by the ground terminal of the first fuel gauge 620 is essentially equivalent to making the voltage of v12' equivalent to the voltage of the ground terminal GND, thereby ensuring that the collected voltage of the first battery BT1 is more accurate.

[0038] As one implementation method, besides estimating the battery's state of charge (SOC) by using the difference between the battery terminal voltage and the open-circuit voltage, and thus obtaining the battery's capacity, the capacity of both batteries can also be obtained by combining the current within the circuit. Specifically, as shown... Figure 6 As shown, the power acquisition device also includes a sampling resistor R1. The negative terminal b22 of the second battery BT2 is connected to the ground terminal GND through the sampling resistor R1. The first fuel gauge 620 and the second fuel gauge 630 are both connected to the sampling resistor R1 to acquire the current flowing through the sampling resistor R1.

[0039] It should be noted that since the first battery BT1, the second battery BT2, and the sampling resistor R1 are connected in series, the current flowing through the sampling resistor R1 is equivalent to the current flowing through the first battery BT1 and the second battery BT2. Therefore, after determining the voltage and current of the first battery BT1, the first fuel gauge 620 can determine the charge level of the first battery BT1 based on these voltage and current. Specifically, the voltage and current can be integrated to obtain the battery charge level. For example, the battery charge level can be obtained using the open-circuit voltage method. The principle of this method is to estimate the remaining charge level of the battery based on its open-circuit voltage. This method measures the battery open-circuit voltage; specifically, the battery terminal voltage V = OCV - IR, and the current can be the current flowing through the sampling resistor R1 obtained earlier. The battery's internal resistance is based on pre-obtained values. Alternatively, the battery charge level can also be obtained using the coulomb method based on the battery's voltage and current. Specifically, this method involves connecting a current-sensing resistor in the battery's charging and discharging circuit, as illustrated in the diagram. Figure 8 As shown, the measurement idea is to first obtain the maximum capacity of the battery when fully charged, and then integrate the discharge current over time during the discharge process to obtain the discharge capacity. The remaining capacity can be obtained by subtracting the discharge capacity from the full charge capacity.

[0040] In one implementation, the first terminal r11 of the sampling resistor R1 is connected to the negative terminal b22 of the second battery BT2, and the second terminal r12 of the sampling resistor R1 is connected to the ground terminal GND; the positive voltage terminal 621 of the first fuel gauge 620 is connected to the output terminal 613 of the differential operational amplifier module 610, the ground terminal 622 of the first fuel gauge 620 is connected to the negative terminal V2 of the power supply, the negative terminal 624 of the first fuel gauge 620 is connected to the first terminal r11 of the sampling resistor, and the positive terminal 623 of the first fuel gauge 620 is connected to the second terminal r12 of the sampling resistor R1. Thus, the voltage collected by the first fuel gauge 620 through the positive terminal 623 and the negative terminal 624 can be used to obtain the current of the sampling resistor R1 based on the resistance value of the sampling resistor R1.

[0041] Similarly, the positive voltage terminal 631 of the second fuel gauge 630 is connected to the positive terminal b21 of the second battery BT2, the ground terminal 632 of the second fuel gauge 630 is connected to the negative terminal b22 of the second battery BT2, the negative current acquisition terminal 634 of the second fuel gauge 630 is connected to the first terminal r11 of the sampling resistor R1, and the positive current acquisition terminal 633 of the second fuel gauge 630 is connected to the second terminal r12 of the sampling resistor R1. Thus, the voltage acquired by the second fuel gauge 630 through the positive current acquisition terminal 633 and the negative current acquisition terminal 634 can be used to obtain the current of the sampling resistor R1 based on the resistance value of the sampling resistor R1.

[0042] The first fuel gauge 620 obtains the sum of the voltage of the first battery BT1 and the current flowing through the sampling resistor R1. Based on the aforementioned fuel quantity statistics method, the fuel quantity of the first battery BT1 can be obtained. Similarly, the second fuel gauge 630 obtains the sum of the voltage of the second battery BT2 and the current flowing through the sampling resistor R1. Based on the aforementioned fuel quantity statistics method, the fuel quantity of the first battery BT1 can be obtained.

[0043] As one implementation method, such as Figure 8 As shown, the power acquisition device also includes a battery balancing module. The battery balancing module 710 is connected to both the first battery BT1 and the second battery BT2, and is used to balance the power of the first battery BT1 and the second battery BT2, that is, the battery balancing module 710 can keep the power of the first battery BT1 and the second battery BT2 consistent. Specifically, the first terminal 711 of the battery balancing module 710 is connected to the positive terminal b21 of the second battery BT2, the second terminal 712 of the battery balancing module 710 is connected to the negative terminal b22 of the second battery BT2, and the third terminal 713 of the battery balancing module 710 is connected to the positive terminal b11 of the first battery BT1.

[0044] As one implementation, to prevent damage to the connection lines between the first and second housings when they rotate relative to each other, in addition to the connection of the negative power supply terminal V2 to the second flexible circuit board FPC2 and the ground terminal GND, and the connection between the negative terminal b12 of the first battery BT1 and the positive terminal b21 of the second battery BT2 via the first flexible circuit board FPC1, the sampling resistor R1, the second fuel gauge 630, and the battery balancing module 710 are all housed in the same housing as the second battery BT2, i.e., all housed in the second housing. Therefore, the wire connecting the negative current acquisition terminal 624 of the first fuel gauge 620 to the first terminal r11 of the sampling resistor, the wire connecting the positive current acquisition terminal 623 of the first fuel gauge 620 to the second terminal r12 of the sampling resistor R1, and the wire connecting the third terminal 713 of the battery balancing module 710 to the first... The wires connecting the positive terminals b11 of battery BT1 all span the two housings. These wires also need to be connected via flexible circuit boards. Specifically, these three wires can be set on the first flexible circuit board FPC1 or the second flexible circuit board FPC2. In this embodiment, the distance between the three wires and the first flexible circuit board FPC1 is less than the distance between the three wires and the second flexible circuit board FPC2. Therefore, the three wires can be connected via the first flexible circuit board FPC1. Specifically, the connection between the negative terminal 624 of the current acquisition of the first fuel gauge 620 and the first terminal r11 of the sampling resistor, the connection between the positive terminal 623 of the current acquisition of the first fuel gauge 620 and the second terminal r12 of the sampling resistor R1, and the connection between the third terminal 713 of the battery balancing module 710 and the positive terminal b11 of the first battery BT1 are all achieved through the first flexible circuit board FPC1.

[0045] Please refer to Figure 9 This document illustrates a power optimization method provided in an embodiment of this application, applied to the aforementioned electronic device, which includes the aforementioned power supply module and power acquisition device. As one implementation, the power acquisition device is the executing entity of the method, and the method includes steps S901 to S904.

[0046] S901: The differential operational amplifier module obtains the voltage difference between the positive and negative terminals of the first battery.

[0047] The first input terminal of the differential operational amplifier module is connected to the positive terminal of the first battery, and the second input terminal of the differential operational amplifier module is connected to the negative terminal of the first battery, for inputting the voltage difference between the voltages collected by the first input terminal and the second input terminal into the first fuel meter.

[0048] S902: The first fuel gauge determines the charge of the first battery based on the voltage difference.

[0049] The first fuel gauge is connected to the output of the differential operational amplifier module to obtain the voltage difference and determine the charge of the first battery based on the voltage difference.

[0050] S903: The second fuel gauge collects the power of the second battery.

[0051] The second fuel gauge is connected across the positive and negative terminals of the second battery to collect the amount of power in the second battery.

[0052] Specifically, the calculation method for the power of the first battery and the power of the second battery can be determined based on the aforementioned implementation method, and will not be repeated here.

[0053] S904: Executes a battery optimization strategy based on the charge level of the first battery and the charge level of the second battery.

[0054] After obtaining the power levels of the first and second batteries, the power regulation module can execute a battery optimization algorithm. Specifically, this battery regulation module can be a module within the electronic device. After the power acquisition device obtains the first power level of the first battery and the second power level of the second battery, it sends the first power level, the second power level, and the current flowing through the sampling resistor to the battery regulation module. The battery regulation module then executes a battery optimization strategy based on these power levels and current. Figure 10 As shown, the battery optimization strategy includes, but is not limited to, optimizing the charging efficiency of the first battery and the second battery, as well as optimizing the balance between the first battery and the second battery. In addition, it may also include displaying the first charge level of the first battery and the second charge level of the second battery on the screen of the electronic device.

[0055] In one implementation, when the electronic device is a foldable screen phone, the electronic device includes a first screen and a second screen, and the first battery level and the second battery level can be displayed on the screen where the electronic device is currently in use. In another implementation, it can be determined whether an application is running in the foreground. The application's state includes foreground running state, background running state, and inactive state. Foreground running state means the application runs on the screen through an interface, and the user can interact with the application through the interface, such as inputting commands or observing information. Background running state means the application runs in the system's resource manager, but generally without an interface. When a user first launches an application, it runs on the first screen, i.e., in the foreground running state. When the user presses the home button, switches another application to the foreground, or locks the mobile device, the application's state changes to the background running state. Inactive state means the application is not launched, i.e., neither in the foreground nor in the background. Specifically, it can be that when the application is running in the foreground or background, its process is killed, at which point the application is in an inactive state, also known as a closed state. If an application is running in the foreground, determine the screen on which the application is running, designate that screen as the screen the electronic device is using, and display the first and second battery levels.

[0056] It should be noted that for parts of this method not described in detail in the embodiments, please refer to the foregoing embodiments, and will not be repeated here.

[0057] Please refer to Figure 11 This document illustrates a structural block diagram of an electronic device according to an embodiment of this application. The electronic device 100 can be a smartphone, tablet computer, e-reader, or other electronic device capable of running applications. The electronic device 100 in this application may include a power supply module 1110, which includes: a positive power supply terminal, a negative power supply terminal, a first battery and a second battery connected in series, and the aforementioned power acquisition device 1120. The implementation methods of the power supply module 1110 and the power acquisition device 1120 are described in the foregoing embodiments and will not be repeated here.

[0058] In addition, the electronic device also includes a first screen and a second screen that are rotatably connected. A first flexible circuit board and a second flexible circuit board are disposed between the first screen and the second screen. The target circuit board is the first flexible circuit board. The negative terminal of the power supply is connected to the ground terminal through the second flexible circuit board.

[0059] Furthermore, the electronic device also includes a first housing and a second housing, which are rotatably connected by a rotating shaft. The first flexible circuit board and the second flexible circuit board are both flexible circuit boards that pass through the rotating shaft. The first screen and the first battery are disposed in the first housing, and the second screen and the second battery are disposed in the second housing.

[0060] Additionally, the electronic device may include one or more of the following components: a processor, a memory, and one or more application programs, wherein the one or more application programs may be stored in the memory and configured to be executed by one or more processors, and the one or more programs are configured to perform the methods as described in the foregoing method embodiments.

[0061] A processor may include one or more processing cores. The processor connects to various parts within the electronic device 100 using various interfaces and lines, and performs various functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in memory, and by calling data stored in memory. Optionally, the processor may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor may integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also not be integrated into the processor and may be implemented separately using a communication chip.

[0062] The memory may include random access memory (RAM) or read-only memory (ROM). The memory can be used to store instructions, programs, code, code sets, or instruction sets. The memory may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as touch functionality, sound playback functionality, image playback functionality, etc.), and instructions for implementing the various method embodiments described below. The data storage area may also store data created by the terminal 100 during use (such as phonebook data, audio and video data, chat log data, etc.).

[0063] In summary, the embodiments of this application obtain the voltage difference between the positive and negative terminals of the first battery through a differential operational amplifier module. The first fuel gauge can accurately obtain the power of the first battery based on this voltage difference. Therefore, the embodiments of this application can accurately obtain the power of the two batteries even when there is impedance interference from the target circuit board between the first battery and the second battery, providing an accurate reference power for subsequent power adjustment operations.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A power acquisition device, characterized in that, This invention relates to an electronic device, which includes a power supply module, a first screen and a second screen rotatably connected, with a first flexible circuit board and a second flexible circuit board disposed between the first screen and the second screen. The power supply module includes a positive power supply terminal, a negative power supply terminal, and a first battery and a second battery connected in series. The positive terminal of the first battery is connected to the positive power supply terminal, and the negative terminal is connected to the positive terminal of the second battery through the first flexible circuit board. The negative terminal of the second battery is connected to a ground terminal, and the negative power supply terminal is connected to the ground terminal through the second flexible circuit board. The power acquisition device includes: A differential operational amplifier module, wherein the first input terminal of the differential operational amplifier module is connected to the positive terminal of the first battery, and the second input terminal of the differential operational amplifier module is connected to the negative terminal of the first battery, for inputting the voltage difference between the voltages collected by the first input terminal and the second input terminal into a first fuel meter, wherein the connection point between the second input terminal of the differential operational amplifier module and the negative terminal of the first battery is located between the negative terminal of the first battery and the first flexible circuit board. A first fuel gauge has its positive voltage terminal connected to the output terminal of the differential operational amplifier module, and its ground terminal connected to the negative terminal of the power supply. It is used to determine the voltage of the first battery based on the voltage difference between the voltage difference and the voltage collected by the ground terminal of the first fuel gauge, and to obtain the charge of the first battery based on the voltage of the first battery. The connection point between the ground terminal of the first fuel gauge and the negative terminal of the power supply is located between the negative terminal of the power supply and the second flexible circuit board. The second fuel gauge is connected across the positive and negative terminals of the second battery to collect the amount of power in the second battery.

2. The power acquisition device according to claim 1, characterized in that, It also includes a sampling resistor, through which the negative terminal of the second battery is connected to the ground terminal; both the first fuel gauge and the second fuel gauge are connected to the sampling resistor to obtain the current flowing through the sampling resistor.

3. The power acquisition device according to claim 2, characterized in that, The first end of the sampling resistor is connected to the negative terminal of the second battery, and the second end of the sampling resistor is connected to the ground terminal. The positive voltage terminal of the first fuel gauge is connected to the output terminal of the differential operational amplifier module, the ground terminal of the first fuel gauge is connected to the negative terminal of the power supply, the negative terminal of the current acquisition of the first fuel gauge is connected to the first terminal of the sampling resistor, and the positive terminal of the current acquisition of the first fuel gauge is connected to the second terminal of the sampling resistor.

4. The power acquisition device according to claim 3, characterized in that, The positive voltage terminal of the second fuel gauge is connected to the positive terminal of the second battery, the ground terminal of the second fuel gauge is connected to the negative terminal of the second battery, the negative terminal of the current acquisition of the second fuel gauge is connected to the first terminal of the sampling resistor, and the positive terminal of the current acquisition of the second fuel gauge is connected to the second terminal of the sampling resistor.

5. The power acquisition device according to claim 1, characterized in that, It also includes a battery balancing module, which is connected to the first battery and the second battery respectively, and is used to balance the power of the first battery and the second battery.

6. An electronic device, characterized in that, It includes a power supply module, which includes a positive power supply terminal, a negative power supply terminal, a first battery and a second battery connected in series, and a power acquisition device as described in any one of claims 1-5.

7. The electronic device according to claim 6, characterized in that, It also includes a first housing and a second housing, which are rotatably connected by a rotating shaft. The first flexible circuit board and the second flexible circuit board are both flexible circuit boards that pass through the rotating shaft. The first screen and the first battery are disposed in the first housing, and the second screen and the second battery are disposed in the second housing.

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