Control method, apparatus, and electronic device

Abstract

The application provides a control method and device and electronic equipment. For electronic equipment configured with a double-battery system with different battery capacities, a target control mode currently applicable to the two battery subsystems can be determined based on a device state of the electronic equipment and working parameters of the two battery subsystems in the device state, so that a battery protection circuit state in a first battery subsystem with smaller battery capacity is adjusted in a timely manner according to the target control mode, the charging mode of the first battery subsystem is adjusted correspondingly, and the charging and discharging control of the two batteries is combined with dynamically obtained working parameters, so that the overall charging speed of the electronic equipment is improved, one battery is prevented from being fully charged or overcharged while the other battery is fully charged, voltage balance between the two batteries in the discharging process is ensured, and efficiency loss is reduced.

Description

Technical Field

[0001] This application relates primarily to the field of power management applications, and more specifically to a control method, device, and electronic device. Background Technology

[0002] In recent years, many electronic devices equipped with dual-battery systems have appeared on the market. The two batteries in this dual-battery system can be connected in series or parallel for charging to meet the power supply needs of the electronic devices.

[0003] However, in the application of dual-battery systems in electronic devices with limited internal space, such as foldable phones, the limited internal space of these devices greatly restricts the charging methods and charging speeds of the two batteries, affecting the user experience of the electronic devices. Summary of the Invention

[0004] In view of this, this application proposes a control method, the method comprising:

[0005] The device status of the electronic device is obtained, as well as the first operating parameters of the first battery subsystem and the second operating parameters of the second battery subsystem in the electronic device; wherein the first operating parameters include a first battery capacity that is less than the second operating parameters include a second battery capacity.

[0006] Based on the device status, the first operating parameter, and the second operating parameter, a target control mode is determined for the first battery subsystem and the second battery subsystem.

[0007] According to the target control mode, the charging mode of the first battery subsystem is adjusted so as to achieve voltage balance between the first battery subsystem and the second battery subsystem based on the dynamically obtained first and second operating parameters.

[0008] The charging methods for the first battery subsystem include: an independent charging method for the first battery subsystem and a balanced charging method in which the second battery subsystem charges the first battery subsystem.

[0009] Optionally, determining the target control mode for the first battery subsystem and the second battery subsystem based on the device state, the first operating parameter, and the second operating parameter includes:

[0010] If the device status indicates that the electronic device is in a charging state, determine the first operating temperature included in the first operating parameter and the second operating temperature included in the second operating parameter;

[0011] If both the first operating temperature and the second operating temperature are detected to be within the fast charging temperature range, then a synchronous fast charging mode is initiated for the first battery subsystem and the second battery subsystem.

[0012] If the first operating temperature or the second operating temperature is detected to be within the fast charging temperature range, an asynchronous fast charging mode is initiated for the first battery subsystem and the second battery subsystem; wherein, in the asynchronous fast charging mode, the battery subsystem whose operating temperature is within the fast charging temperature range initiates the fast charging mode, and the battery subsystem whose operating temperature exceeds the fast charging temperature range initiates the non-fast charging mode.

[0013] If the device status indicates that the electronic device is in a discharging state, the voltage equalization control mode between the first battery subsystem and the second battery subsystem is activated.

[0014] Optionally, adjusting the charging mode of the first battery subsystem according to the target control mode to achieve voltage balance between the first and second battery subsystems based on dynamically obtained first and second operating parameters includes:

[0015] If the target control mode indicates that both the first battery subsystem and the second battery subsystem have entered the charging state, adjust the battery protection circuit of the first battery subsystem to enter the open circuit state, and disconnect the charging path between the first battery subsystem and the system charger.

[0016] According to the equalization control logic corresponding to the target control mode, based on the dynamically obtained first and second operating parameters, the first charger is controlled to charge the first battery of the first battery subsystem, and the system charger and the second charger are controlled to charge the second battery of the second battery subsystem, so as to maintain the voltage difference between the first battery and the second battery within a preset voltage range.

[0017] Wherein, the first charger refers to the charger of the first battery subsystem, the second charger refers to the charger of the second battery subsystem, and both the first charger and the second charger are powered by the system charger; the second battery powers the electronic device system.

[0018] Optionally, adjusting the charging mode of the first battery subsystem according to the target control mode to achieve voltage balance between the first and second battery subsystems based on dynamically obtained first and second operating parameters includes:

[0019] If the target control mode is voltage equalization control mode, adjust the battery protection circuit of the first battery subsystem to enter the voltage equalization state; in the voltage equalization state, the voltage equalization resistor of the battery protection circuit is in working state.

[0020] The dynamic voltage difference between the first battery voltage included in the first operating parameter and the second battery voltage included in the second operating parameter is obtained;

[0021] Based on the dynamic voltage difference, the second battery of the second battery subsystem and the first battery of the first battery subsystem are controlled to perform equal charging;

[0022] Once the dynamic voltage difference is determined to be less than a first voltage threshold, the battery protection circuit is adjusted to enter the system power supply state so that the first battery subsystem can be connected to the system charger and supply power to the electronic device system.

[0023] Optionally, controlling the mutual equalization charging between the second battery of the second battery subsystem and the first battery of the first battery subsystem based on the dynamic voltage difference includes:

[0024] If the electronic device is in system operation state, the voltage of the first battery is greater than the voltage of the second battery, and the corresponding dynamic voltage difference is less than the second voltage threshold, the first battery of the first battery subsystem is controlled to charge the second battery of the second battery subsystem.

[0025] If the electronic device is in system operation state, the voltage of the first battery is greater than the voltage of the second battery, and the corresponding dynamic voltage difference is greater than the third voltage threshold, the battery protection circuit is adjusted to enter the open circuit state and a charging prompt message is output.

[0026] If the electronic device is in a powered-off state, the voltage of the first battery is less than the voltage of the second battery, and the absolute value of the corresponding dynamic voltage difference is greater than the fourth voltage threshold, the second battery of the second battery subsystem is controlled to charge the first battery of the first battery subsystem.

[0027] Optionally, both the first operating parameter and the second operating parameter include the battery voltage, charging current, operating temperature, and battery internal resistance of the corresponding battery subsystem.

[0028] The step of controlling the first charger to charge the first battery of the first battery subsystem according to the balanced control logic corresponding to the target control mode, based on the dynamically obtained first and second operating parameters, and the step of the system charger and the second charger to charge the second battery of the second battery subsystem, includes:

[0029] According to the equalization control logic corresponding to the target control mode, based on the dynamic parameter difference between the obtained first operating parameter and the second operating parameter, the first charging control parameter for the first battery subsystem and the second charging control parameter for the second battery subsystem are determined.

[0030] According to the first charging control parameters, the first charger is controlled to charge the first battery of the first battery subsystem;

[0031] According to the second charging control parameters, the system charger and the second charger are controlled to charge the second battery of the second battery subsystem.

[0032] This application also proposes a control device, the device comprising:

[0033] The data acquisition module is used to acquire the device status of the electronic device, as well as the first operating parameters of the first battery subsystem and the second operating parameters of the second battery subsystem in the electronic device; wherein the first operating parameters include a first battery capacity that is less than the second operating parameters include a second battery capacity.

[0034] The target control mode determination module is used to determine the target control mode for the first battery subsystem and the second battery subsystem based on the device status, the first operating parameter and the second operating parameter;

[0035] The voltage equalization control module is used to adjust the charging mode of the first battery subsystem according to the target control mode, so as to achieve voltage equalization between the first battery subsystem and the second battery subsystem based on the dynamically obtained first operating parameters and second operating parameters.

[0036] The charging methods for the first battery subsystem include: an independent charging method for the first battery subsystem and a balanced charging method in which the second battery subsystem charges the first battery subsystem.

[0037] This application also proposes an electronic device, comprising: a first battery subsystem, a second battery subsystem, a connector for realizing a circuit connection between the first battery subsystem and the second battery subsystem, a system charger, and a controller, wherein...

[0038] The first battery subsystem is equipped with a battery protection circuit, which is used to connect or disconnect the first battery subsystem from the system charger to change the charging mode of the first battery subsystem.

[0039] The second battery subsystem is connected to the system charger, and the system charger is connected to the electronic device system; the first battery capacity of the first battery subsystem is smaller than the second battery capacity of the second battery subsystem;

[0040] The controller is connected to the first battery subsystem and the second battery system respectively, and is used to implement the control method described above.

[0041] Optionally, the first battery subsystem includes a first battery, a first battery detection circuit, and a first charger; the second battery subsystem includes a second battery, a second battery detection circuit, and a second charger.

[0042] The first battery detection circuit is connected to the first battery, the battery protection circuit, the first charger, and the controller, and is controlled by the controller to detect the first operating parameter of the first battery subsystem.

[0043] The second battery detection circuit is connected to the second battery, the system charger, the second charger and the controller, and is controlled by the controller to detect the second operating parameters of the second battery subsystem.

[0044] The battery protection circuit connects the first battery, the first charger, the system charger, and the controller. It is controlled by the controller to disconnect the connection between the first battery and the system charger in the open circuit state, so that the first charger charges the first battery; and to connect the first battery and the second battery in the voltage equalization state, so that the first battery and the second battery can be charged equally.

[0045] Optionally, the battery protection circuit includes: a voltage balancing branch and a current-prevention branch connected in parallel, wherein:

[0046] The voltage balancing branch includes a balancing resistor and a switching circuit. When the switching circuit is in the closed state, the battery protection circuit is determined to enter the voltage balancing state, so that the first battery is connected to the system charger. When the switching circuit is in the open state and the current anti-current branch is in the open-circuit state, the battery protection circuit is determined to enter the open-circuit state, so that the first battery is disconnected from the system charger.

[0047] The current-prevention branch includes a unidirectional conduction component with its two ends connected to the first battery and the system charger, respectively, and the conduction direction of the unidirectional conduction component is from the first battery to the system charger.

[0048] Therefore, this application provides a control method, device, and electronic device. For electronic devices equipped with dual battery systems of different battery capacities, the target control mode applicable to the two battery subsystems can be determined based on the device status of the electronic device and the operating parameters of the two battery subsystems under that device status. In accordance with the target control mode, the battery protection circuit status of the first battery subsystem with the smaller battery capacity is adjusted in a timely manner, and the charging mode of the first battery subsystem is adjusted accordingly. Combined with the dynamically obtained operating parameters, the charging and discharging control of the two batteries is improved, the overall charging speed of the electronic device is improved, one battery is not fully charged while the other is fully charged or overcharged, and the voltage balance between the two batteries is ensured during the discharge process, reducing efficiency loss. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0050] Figure 1 A schematic diagram of the hardware structure of an optional example of an electronic device suitable for the control method proposed in this application;

[0051] Figure 2 A schematic diagram of the hardware structure of another alternative example of an electronic device suitable for the control method proposed in this application;

[0052] Figure 3 A schematic diagram of the hardware structure of another alternative example of an electronic device suitable for the control method proposed in this application;

[0053] Figure 4 A schematic diagram of the hardware structure of another alternative example of an electronic device suitable for the control method proposed in this application;

[0054] Figure 5 A flowchart illustrating an optional example of the control method proposed in this application;

[0055] Figure 6 A flowchart illustrating yet another alternative example of the control method proposed in this application;

[0056] Figure 7 A flowchart illustrating yet another alternative example of the control method proposed in this application;

[0057] Figure 8 A flowchart illustrating yet another alternative example of the control method proposed in this application;

[0058] Figure 9 This is a schematic diagram of an optional example of the control device proposed in this application;

[0059] Figure 10 This is a schematic diagram of another alternative example of the control device proposed in this application. Detailed Implementation

[0060] For dual-battery systems in electronic devices, if the two battery subsystems are charged in series, the charging current input to the two battery subsystems is the same, requiring the two battery capacities to be exactly the same. However, due to the limited internal space of electronic devices such as foldable screen phones, the folding part where the electronic device's motherboard is located also occupies some space, resulting in different spaces in the upper and lower folding parts. In order to maximize battery capacity, the battery capacities of the two battery subsystems assembled in different folding spaces are different. Therefore, dual-battery subsystems in such electronic devices cannot use the series charging method.

[0061] Therefore, dual-battery systems in electronic devices such as foldable phones require parallel charging to control the charging of two battery subsystems with different capacities. In this case, when the electronic device is connected to an external power source for charging, a single system charger simultaneously charges both battery subsystems in parallel. However, due to differences in the capacity and internal resistance of the two batteries, fast charging is not possible. To reduce the voltage difference between the two batteries, the input current needs to be minimized, thus slowing down the charging speed of the electronic device.

[0062] To improve the above problems and meet the current user charging needs of electronic devices, a system design for independent charging of two batteries, such as a battery back clip, is proposed to achieve synchronous fast charging of the two batteries. However, when the two batteries are discharging, due to the inconsistent voltage of the two batteries with different capacities, the battery with the higher voltage, battery 1, will be boosted to a certain voltage value to charge battery 2, and then battery 2 will discharge. The charging process of battery 1 to battery 2 will result in a large efficiency loss.

[0063] Furthermore, when charging foldable devices (such as foldable screen phones), the long FPC (Flexible Printed Circuit Board) connecting the two folded sections causes a significant voltage drop, resulting in different voltages applied to the two batteries. Therefore, during the segmented charging and constant-voltage charging phases of the dual-battery system, precise current control based on battery voltage is required to avoid the risk of overvoltage, which is often difficult to achieve. Using low-current charging cannot meet the fast-charging design requirements of foldable devices. Moreover, the battery subsystem in the folding area where the motherboard is located operates at a higher temperature, while the battery subsystem in the other folding area often operates at a lower temperature. To avoid damage to components due to overheating, the charging current needs to be reduced according to the battery state of the side with higher temperature, which also reduces the charging speed.

[0064] After a period of use, the two batteries of different capacities will age at different rates, resulting in different changes in their internal resistance and thus different charging rates. Subsequently, for charging safety, the electronic device system needs to charge the battery with the higher aging rate, which reduces the charging speed and limits the design of fast charging.

[0065] Therefore, for dual-battery systems in foldable screen electronic devices with limited internal space, in order to address the adverse effects of voltage differences caused by the FPC connection between the two battery subsystems on charging speed, meet users' fast charging needs for such electronic devices, and prevent one battery from being undercharged or overcharged due to inconsistent charging speeds in the charging and discharging applications of electronic devices, as well as the problem of reverse current flow caused by inconsistent battery voltages, this application proposes configuring a battery protection circuit in the first battery subsystem with a smaller battery capacity to achieve voltage balance between the two battery subsystems and prevent reverse current flow.

[0066] Based on this, under different device states such as charging / discharging state and power-off state of electronic devices, the target control mode for the two battery subsystems can be flexibly selected. According to the target control mode, the charging method of the first battery subsystem can be adjusted, such as the independent charging method of the first battery subsystem or the equalization charging method of the second battery subsystem to the first battery subsystem. Based on the dynamically obtained working parameters, voltage balance between the two battery subsystems can be achieved, solving the above-mentioned technical problems caused by voltage imbalance.

[0067] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0068] Reference Figure 1 This is a schematic diagram of the hardware structure of an optional example of an electronic device suitable for the control method proposed in this application. The electronic device can be a terminal equipped with a dual-battery system, such as a foldable screen device like a flip-screen phone, or a device with a small internal space and different spaces at both ends, such as wireless headphones. This application does not limit the product type of the electronic device, such as... Figure 1 As shown, the electronic device may include: a first battery subsystem 110, a second battery subsystem 120, a connector 130 for circuit connection between the first battery subsystem 110 and the second battery subsystem 120, a system charger 140, and a controller 150, wherein:

[0069] The first battery capacity of the first battery subsystem 110 is smaller than the second battery capacity of the second battery subsystem 120. Relative to the second battery subsystem 120, the first battery subsystem 110 is equipped with a battery protection circuit 111. The battery protection circuit 111 can be used to connect or disconnect the first battery subsystem 110 from the system charger 140 to change the charging mode of the first battery subsystem 110, such as the independent charging mode of the first battery subsystem, or the equalization charging mode in which the second battery subsystem 120 charges the first battery subsystem 110.

[0070] It is evident that regardless of whether the electronic device is charging, discharging, or powered off, it is not required that the first battery subsystem 110 be connected to the electronic device system through the system charger 140. This is to address the various technical problems mentioned above caused by the system charger 140 directly charging the two battery subsystems in parallel, resulting in different charging speeds and excessive voltage differences between the two batteries of different capacities. The implementation process can be referred to the description in the corresponding section of the following embodiments.

[0071] The second battery subsystem 120 is connected to the system charger 140. Since the system charger 140 is connected to the electronic device system, the system power supply can directly charge the second battery subsystem 120 to meet the fast charging requirements of the second battery subsystem. The second battery subsystem 120 can also supply power to the electronic device system to ensure the normal operation of the electronic device system.

[0072] In practical applications, because larger battery capacities result in larger volumes, the second battery subsystem 120, with its larger capacity, occupies more space compared to the first battery subsystem 110, which has a smaller capacity. Therefore, when assembling electronic devices in a foldable screen device, the first battery subsystem 110 can be assembled in the first folding area where the motherboard is located, and the second battery subsystem 120 can be assembled in the second folding area. The first folding area has less space compared to the second folding area.

[0073] Taking foldable screen phones as an example, the motherboard of a foldable screen phone is usually installed in the folding area on the bottom side. The first battery subsystem 110 can be installed in the folding area on the bottom side, and the second battery subsystem 120 can be installed in the folding area on the top side of the foldable screen phone. In other words, the small-capacity battery is installed in the folding part where the motherboard of the foldable screen phone is located, so as to maximize the battery capacity of the electronic device.

[0074] For foldable screen electronic devices, since the first battery subsystem 110 and the second battery subsystem 120 are respectively assembled in different folding areas, the connector 130 that realizes the circuit connection between the two battery subsystems can be a printed circuit board (FPC) made of flexible material to meet the folding use requirements of foldable screen electronic devices. This application does not limit the construction of the connector 130 and the way it connects the two battery subsystems, and it can be determined as appropriate.

[0075] The controller 150 can be connected to the first battery subsystem 110 and the second battery subsystem 120 respectively. According to the control method proposed in this application, the controller can control the two battery subsystems, such as obtaining the operating parameters of the two battery subsystems in real time or periodically, and determining the appropriate target control mode for the two battery subsystems accordingly. Then, according to the target control mode, the charging mode of the first battery subsystem 110 is adjusted to meet the fast charging requirements and voltage equalization control requirements of the first battery subsystem, and to avoid excessive voltage difference between the two battery subsystems, which would affect the safety of the electronic device. The implementation process of this control method can be referred to the description of the corresponding part of the method embodiment below, which will not be described in detail here.

[0076] In this application embodiment, the controller 150 may include, but is not limited to, one or more of the following: a central processing unit (CPU), an application-specific integrated circuit (ASIC), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices. This application does not limit the type and composition of the controller 150, and can be determined as appropriate.

[0077] In some other embodiments proposed in this application, such as Figure 2 As shown, the first battery subsystem 110 also includes a first battery 112, a first battery detection circuit 113, and a first charger 114. Similarly, the second battery subsystem 120 may include at least a second battery 121, a second battery detection circuit 122, and a second charger 123.

[0078] The first battery detection circuit 113 connects to the first battery 112, the battery protection circuit 111, the first charger 114, and the controller 150. The connection methods and interface types used between different devices / circuits may vary, depending on the working principle and functional requirements of each device / circuit. This will not be detailed in this embodiment. In this embodiment, the first battery detection circuit 113 can be controlled by the controller 150 to detect the first operating parameters of the first battery subsystem 110. For example, in response to detection control commands for different types of operating parameters sent by the controller 150, it can obtain the corresponding type of first operating parameters of the detected devices and / or circuits in the first battery subsystem 110.

[0079] It should be understood that, for the detection of different types of operating parameters, the first battery detection circuit 113 can be configured with corresponding detectors, such as temperature sensors, charge sensors, voltage sensors, current sensors, and resistance sensors, to sequentially realize various operating parameters of the first battery in the first battery subsystem, such as the first operating temperature, first battery charge, first battery voltage, first battery current, and first battery internal resistance. Therefore, the aforementioned first operating parameters may include, but are not limited to, one or more combinations of parameters listed in this paragraph, and can be determined as appropriate. This application does not limit the content of the first operating parameters or their detection methods.

[0080] Similarly, the second battery detection circuit 122 can be connected to the second battery 121, the system charger 140, the second charger 123, and the controller 150. The second battery detection circuit 122 is controlled by the controller 150 to detect the second operating parameters of the second battery subsystem 120. The composition and operating principle of the second battery detection circuit 122 are similar to those of the first battery detection circuit 113 described above. Therefore, the second operating parameters may include, but are not limited to, one or more combined parameters such as the second operating temperature, second battery charge, second battery voltage, second battery current, and second battery internal resistance of the second battery 121 in the second battery subsystem 120. This application does not elaborate on the methods for obtaining different second operating parameters.

[0081] As can be seen, the first battery subsystem 110 and the second battery subsystem 120 each have their own charging circuits. The system charger 140 supplies power to the first charger 114 and the second charger 123 respectively, enabling the first charger 114 to charge the first battery 112 and the second charger 123 to charge the second battery 121, thus meeting the fast-charging requirements of both batteries. It should be noted that since the second battery 121 is also directly connected to the system charger 140, when charging the second battery 121, both the system charger 140 and the second charger 123 charge it simultaneously. This also supplies power to other components in the second battery subsystem 120, and even to other components / circuits in the folded area where the second battery subsystem 120 is located (such as the second battery detection circuit 122), ensuring the normal operation of these components / circuits (such as overvoltage protection circuits, display drivers, etc.). Similarly, as... Figure 2 As shown, the output terminal of the first charger 114 can also be connected to other devices in the first battery subsystem 110, such as the first battery detection circuit 113, to meet the power supply requirements of other devices.

[0082] Based on the above description of the composition structure of the two battery subsystems, the battery protection circuit 111 configured in the first battery subsystem 110 is connected to the first battery 112, the first charger 114, the system charger 140, and the controller 150. This battery protection circuit 111 includes at least an open-circuit state and a voltage equalization state. In practical applications, the battery protection circuit 111 is controlled by the controller 150. In the open-circuit state, it disconnects the connection between the first battery 112 and the system charger 140, allowing the first charger 114 to charge the first battery 112. Simultaneously, the system charger 140 and the second charger 123 can charge the second battery 121. Through the equalization control algorithm, synchronous fast charging of the first battery 112 and the second battery 121 can be reliably achieved, or one battery can be fast charged while the other can be charged in a non-fast charging mode. From the perspective of the electronic device as a whole, fast charging is achieved, improving the charging speed compared to conventional charging methods.

[0083] In addition, the battery protection circuit 111 is controlled by the controller 150. When the voltage is balanced, such as when the electronic device is off, during assembly or maintenance, it can realize the charging connection between the first battery 112 and the second battery 121. In this way, when the voltage difference between the first battery 112 and the second battery 121 is large, the charging connection can be used to achieve balanced charging between the first battery 112 and the second battery 121, thus achieving power balance between the two batteries.

[0084] In some other embodiments, in conjunction with the above description of the battery protection circuit 111 in the first battery subsystem 110, such as... Figure 3 As shown, the battery protection circuit 111 described above may include a voltage balancing branch and a current prevention branch connected in parallel, wherein:

[0085] The voltage balancing branch may include a balancing resistor R1 and a switching circuit S1. When the switching circuit S1 is in the closed state, it can be determined that the battery protection circuit 111 has entered the voltage balancing state. In accordance with the above description, the first battery 112 can be connected to the system charger 140 to power the electronic device system. When the switching circuit S1 is in the open state and the current protection branch is in the open-circuit state, it can be determined that the battery protection circuit 111 has entered the open-circuit state. In accordance with the corresponding description above, the connection between the first battery 112 and the system charger 140 will be disconnected, and the first charger 114 will charge the first battery 112 independently. Regarding the control process of the controller 150 on the switching state of the above-mentioned switching circuit S1, please refer to the description of the corresponding part of the method embodiment below. This embodiment will not be described in detail here.

[0086] The resistance value of the equalizing resistor R1 can be determined based on one or more operating parameters such as the internal resistance, capacity, and charging rate of the first battery 112 and the second battery 121, in order to avoid the second battery 121 providing an excessively high supply voltage when charging the first battery 112, which would cause the first battery 112 to be overcharged and affect its service life. This application does not describe in detail the resistance value and structure of the equalizing resistor R1, nor the working principle of achieving voltage equalization between the large and small batteries based on the equalizing resistor R1.

[0087] The current backflow prevention branch may include a unidirectional conducting component S0 with its two ends connected to the first battery 112 and the system charger 140 respectively. The conduction direction of the unidirectional conducting component S0 is from the first battery 112 to the system charger 140, so that the power supply current of the first battery subsystem is constrained to the power supply current output by the first battery 112 to the electronic device system connected to the system charger 140, and the system charger 140 and the second battery 121 are prohibited from directly transmitting power supply current to the first battery 112. This solves the problem of current backflow caused when the voltages of the two batteries are inconsistent during the discharge state of the electronic device.

[0088] It should be noted that this application does not limit the device type of the unidirectional conduction component S0 included in the current-prevention branch; it can be, for example... Figure 3 The unidirectional switching diode S0 shown, and the circuit structure of the battery protection circuit 111 including the two voltage balancing branches and the current prevention branch, include, but are not limited to, the following: Figure 3 The corresponding branch structures shown can be flexibly adjusted according to actual needs, and will not be listed one by one in this application.

[0089] Based on the above analysis, for example, such as Figure 4 The circuit diagram shown is another alternative example of a foldable screen electronic device. The first battery subsystem 110 of this foldable screen electronic device can be located within the folding space on the motherboard side. The first battery subsystem 110, system charger 140, and controller 150 can all be mounted on the motherboard. The layout of each part includes, but is not limited to, other layout options. Figure 4 The layout structure shown can be flexibly adjusted according to the actual situation. Furthermore, the layout of each component of the electronic device shown in the figures of the above embodiments does not necessarily represent the actual layout relationship of each component in the electronic device. The circuit layout of the electronic device described in each embodiment can be determined according to the actual situation. This application will not describe them in detail.

[0090] In such Figure 4 In the foldable screen electronic device shown, the first battery can have a capacity of 600mAh (600 mA of current can provide one hour of operation), and the second battery can have a capacity of 2900mAh, but is not limited to these two capacity specifications. The specific capacity can be determined based on the type of electronic device and its configuration requirements. This application uses this as an example for illustration. Figure 4 As shown, the controller 150, as the system core of the electronic device, is configured with various GPIOs (General-purpose input / output) for connecting other devices in the electronic device. For example, it can connect to the switching circuit S1 and the switching diode S0 in the battery protection circuit 111, as well as multiple PMIC (Power Management IC) GPIO ports of the first charger 114, and multiple AP (Application Processor) GPIO ports for connecting other devices in the electronic device. According to other control requirements, other ports can also be configured in the controller 150, which will not be listed one by one in this embodiment.

[0091] The first charger 114 can be, but is not limited to, an independent charging circuit of model SGM41516; the second charger 123 can be, but is not limited to, a booster charger of model BQ25960; the system charger 140 can be, but is not limited to, a charger of model PM8350BH. The power cord of the system charger 140 can be connected to an overvoltage protection circuit OVP. The other end of the overvoltage protection circuit OVP can be connected to a power connector (such as a USB connector). Through this power connector, an external power supply can be connected via wired or wireless means to charge the electronic device.

[0092] Furthermore, since the input terminals of both the first charger 114 and the second charger 123 can be connected to the power line of the system charger 140, current can be transmitted to the first charger 114 and the second charger 123 through the power line, enabling the two chargers to complete the charging of the battery in their respective battery subsystems. During this charging process, the controller 150 can control the output current / voltage of the first charger 114 and the second charger 123 according to the control algorithm corresponding to the target control mode, such as increasing the charger output current / voltage to accelerate the battery charging speed and meet the battery fast charging requirements. This application details the charging principle of the battery fast charging mode.

[0093] In this embodiment, when the electronic device enters the charging state, both the switching circuit S1 and the switching diode S0 in the battery protection circuit 111 are in an open circuit state, causing the first battery 112 to disconnect from the charging and discharging line of the system charger 140. Then, the controller 150 controls the first charger 114 to charge the first battery 112 independently as described above. At the same time, since the second battery 121 is in a normally connected state with the system charger 140 and the second charger 123, the system charger 140 and the second charger 123 jointly charge the second battery 121, satisfying the charging needs of the second battery in different modes. The control implementation method can be referred to the description of the corresponding part of the method embodiment below, which will not be described in detail here.

[0094] During the control process described above, the controller needs to dynamically obtain the operating parameters of each of the two battery subsystems in order to adjust the control mode for each subsystem in a timely manner to meet the corresponding control requirements. Therefore, based on the operating parameter detection requirements, detectors such as fuel gauges (i.e., power sensors), resistance sensors, and temperature sensors can be configured in each of the two battery subsystems to detect operating parameters such as battery voltage, internal resistance, and operating temperature in real time or periodically. Figure 4 This explanation focuses on using a battery subsystem equipped with a fuel gauge and a resistance sensor to determine the corresponding battery's operating parameters, such as voltage, current, and internal resistance. Other types of detectors can be connected to controllers and batteries as needed, but these will not be detailed here. Regarding... Figure 4 The control process of the dual-battery system shown can be referred to the description in the corresponding section of the following embodiment, which will not be described in detail here.

[0095] It should be understood that, Figures 1-4 The structure of the electronic device shown does not constitute a limitation on the electronic device in the embodiments of this application. In practical applications, the electronic device may include more components, such as those shown in the figure above, or combine certain components. Figure 4Taking the dual-battery system structure shown as an example, in the folded area where the motherboard is not installed, devices / circuits such as display drivers (e.g., OLED (Organic Light-Emitting Diode) drivers, audio power amplifier circuits (SmartPA (Power Amplifier), overvoltage protection circuits OVP), etc., can also be installed in this folded area. Furthermore, the electronic device may also include other components such as cameras, microphones, indicator lights, antennas, etc., which can be determined according to the functional requirements of the electronic device; these will not be listed here.

[0096] Based on the circuit structure of the electronic device described in the above embodiments, the following will describe in detail the control process of the controller for two battery subsystems with different battery capacities under different device states, such as charging and discharging state, power-off state, assembly or after-sales state, to achieve control requirements such as voltage balancing and synchronous / asynchronous fast charging between the two batteries with different capacities. However, it is not limited to the control method described in the embodiments below, and can be flexibly adjusted according to actual needs. This application will not provide detailed examples of each method.

[0097] Reference Figure 5 The diagram below illustrates an optional example of the control method proposed in this application. This method can be applied to electronic devices as described above. This application uses a foldable screen phone as an example to explain the control steps, but is not limited to this type of foldable screen electronic device. Figure 5 As shown, the control method may include:

[0098] Step S51: Obtain the device status of the electronic device, as well as the first operating parameters of the first battery subsystem and the second operating parameters of the second battery subsystem in the electronic device.

[0099] The electronic device of this application has two battery subsystems with different battery capacities. The first battery subsystem may have a smaller first battery capacity than the second battery subsystem. As analyzed above, in the foldable screen electronic device, the first battery subsystem can be installed in the folding area on the motherboard side, and the second battery subsystem can be installed in the folding area on the power distribution board side. The installation positions of the two battery subsystems and their implementation process will not be described in detail in this embodiment.

[0100] In order to monitor the working status of electronic devices and their two battery subsystems, the device status and the working parameters of each of the two battery subsystems can be detected in real time or periodically, such as the voltage, current, capacity, internal resistance, temperature and other parameters of the batteries in the corresponding battery subsystems. These parameters can be directly sensed by the corresponding type of detector configured in the battery subsystem, or calculated based on the parameters sensed by the detector. This application does not limit the methods for obtaining different types of working parameters, and can refer to but is not limited to the descriptions in the corresponding parts of the above embodiments.

[0101] The device status of an electronic device may include charging status, discharging status (i.e., the electronic device's usage status), power-off status, assembly / after-sales status, etc., which can be determined based on the status of at least one corresponding component. Of course, the controller can also determine the device status of the electronic device based on information such as the first operating parameter and / or the second operating parameter obtained. This application does not limit the method for obtaining the device status of the electronic device.

[0102] Step S52: Based on the device status, the first operating parameter, and the second operating parameter, determine the target control mode for the first battery subsystem and the second battery subsystem.

[0103] In this application embodiment, the control requirements for the two battery subsystems differ depending on the device state of the electronic device, necessitating the execution of corresponding control logic to achieve the appropriate control of the two battery subsystems. This application can pre-determine each control method for the two battery subsystems as a control mode. For example, in the charging state of the electronic device, the two battery subsystems are controlled to perform synchronous or asynchronous fast charging to meet the fast charging requirements of the electronic device; in the powered-off state or assembly / after-sales state of the electronic device, the voltage of the two battery subsystems is balanced to avoid voltage differences that could cause the high-voltage battery to impact the low-voltage battery, or cause damage to the device due to accidental power-on operation when a small-capacity battery is installed without a large-capacity battery device; in the discharging state of the electronic device, the two battery subsystems are controlled to discharge synchronously to avoid efficiency loss caused by voltage differences between the two batteries. However, this is not limited to the control methods described in the embodiments of this application.

[0104] It should be noted that for the same control method described above, if the operating parameters of the two battery subsystems of the current electronic device change, the control logic for charging and discharging may differ. For example, if the internal resistance of the two batteries changes, the charge / discharge rates used for charge / discharge balancing control may differ. If the operating temperature relationship between the two battery subsystems changes, the batteries in the two subsystems that activate fast charging mode and those that do not may be swapped, etc. This application does not provide detailed examples of all these possibilities; the specific approach depends on the circumstances.

[0105] Step S53: According to the target control mode, adjust the charging mode of the first battery subsystem to achieve voltage balance between the first battery subsystem and the second battery subsystem based on the dynamically obtained first and second operating parameters.

[0106] Based on the description of the relevant parts of the above electronic device embodiment, since the first battery subsystem and the second battery subsystem have different battery capacities and internal resistances, and a voltage drop occurs on the connector FPC between the two battery subsystems, resulting in different voltages applied to the two batteries, and the battery internal resistance changes due to different degrees of aging, the charging rate of the two batteries is inconsistent. Therefore, during the charging process of the electronic device, it is necessary to disconnect the first battery subsystem from the system charger and use the first charger of the first battery subsystem to charge it independently, so that the charging control parameters of the two batteries can be different to meet the fast charging requirements of each battery.

[0107] During the discharge process of electronic devices, the different discharge rates of the two batteries will result in different remaining capacities for each battery. In order to avoid the large-capacity battery voltage being much lower than the small-capacity battery voltage, which would prevent the device system from starting up and operating normally, or the large-capacity battery voltage being much higher than the small-capacity battery voltage, which would cause efficiency loss, charging balance control between the two batteries can be achieved when the electronic device is powered off.

[0108] Based on the above analysis, the charging methods of the first battery subsystem can include: an independent charging method for the first battery subsystem, in which the first charger charges the first battery independently, while the second battery can be charged jointly by the second charger and the system charger; and a balanced charging method in which the second battery subsystem charges the first battery subsystem, in which the second battery with a high charge charges the first battery through a connected battery protection circuit to achieve a balance of charge between the two batteries.

[0109] Therefore, based on the current equipment status and the operating parameters of the two battery subsystems, after determining the target control mode applicable to the two battery subsystems, the target control logic corresponding to the target control mode can be called and executed. By changing the state of the battery protection circuit in the first battery subsystem, the charging method of the first battery subsystem is changed. In this way, according to the changed charging method, the first and second operating parameters are dynamically obtained to control the charging and discharging of the two batteries, thereby achieving voltage balance control between the two batteries. The control process is not described in detail in this embodiment.

[0110] In summary, in this embodiment, for electronic devices with dual battery systems of different battery capacities, such as foldable screen phones and other foldable screen electronic devices with small internal space, a target control mode suitable for the two battery subsystems is determined based on the device state of the electronic device and the operating parameters of the two battery subsystems under that device state. According to this target control mode, the battery protection circuit state of the first battery subsystem with the smaller battery capacity is adjusted in a timely manner, and the charging method of the first battery subsystem is adjusted accordingly. Combined with dynamically obtained operating parameters, the charging and discharging control of the two batteries is improved, increasing the overall charging speed of the electronic device, preventing one battery from being undercharged while the other is fully charged or overcharged, and ensuring voltage balance between the two batteries during discharge, thus reducing efficiency loss.

[0111] Reference Figure 6 This is a flowchart illustrating another optional example of the control method proposed in this application. This embodiment can be a description of an optional refined implementation of the control method described above, such as... Figure 6 As shown, this refined implementation method may include:

[0112] Step S61: Obtain the device status of the electronic device, as well as the first operating parameters of the first battery subsystem and the second operating parameters of the second battery subsystem in the electronic device.

[0113] The first operating parameter includes a first battery capacity that is smaller than the second operating parameter includes a second battery capacity. However, this application does not limit the battery capacity of each battery in these two battery subsystems, and it can be determined based on the system power requirements of the electronic device. The implementation method of step S61 can be referred to the description in the corresponding part of the above embodiment, and will not be repeated here.

[0114] Step S62: If the device status indicates that the electronic device is in a charging state, determine the first operating temperature included in the first operating parameter and the second operating temperature included in the second operating parameter.

[0115] Step S63: If the first operating temperature and the second operating temperature are both within the fast charging temperature range, start the synchronous fast charging mode for the first battery subsystem and the second battery subsystem.

[0116] Step S64: If the first operating temperature or the second operating temperature is detected to be within the fast charging temperature range, start the asynchronous fast charging mode for the first battery subsystem and the second battery subsystem.

[0117] As described in the corresponding sections of the above embodiments, during the charging process of the electronic device, the folded area where the motherboard is located generates a significant amount of heat. This results in the battery's operating temperature in the folded area on the motherboard side being higher than the battery's operating temperature in the other folded area. Even if the two batteries have different operating temperatures, to ensure a high charging speed, this application proposes using an asynchronous fast charging mode to charge both batteries. If the operating temperatures of both batteries are not high, a synchronous fast charging mode can be activated to fast charge both batteries, further improving the charging speed.

[0118] Therefore, during the charging of electronic devices via wired or wireless means, the operating temperatures of the two battery subsystems can be monitored and compared with preset fast charging temperature ranges to determine whether fast charging is possible. If both battery subsystems can activate fast charging mode, the synchronous fast charging mode for the two battery subsystems can be determined as the target control mode. If only one battery subsystem's operating temperature is within the fast charging temperature range, it can be fast charged, while the other battery subsystem is charged using a non-fast charging method. That is, the charging speed of the other battery subsystem is slower than that of the fast-charging battery subsystem, but from the perspective of the overall charging speed of the electronic device, it is still faster than the conventional charging speed, thus meeting the fast charging design requirements of the electronic device.

[0119] Since fast charging causes a rapid increase in the battery's operating temperature, the aforementioned fast charging temperature range represents the temperature range within which fast charging is permissible, resulting in a temperature rise that will not be excessively high and cause damage. This application does not limit the numerical value of the fast charging temperature range, and the range can differ for different battery capacities. By comparing the operating temperature of the battery subsystem with its corresponding fast charging temperature range, it can be determined whether fast charging is possible for the battery within that subsystem. Optionally, for battery subsystems of different capacities, a fixed fast charging temperature range can be used to determine whether fast charging mode can be activated.

[0120] In addition, for the asynchronous fast charging mode started by the two battery subsystems, the battery subsystem whose operating temperature is within the fast charging temperature range starts the fast charging mode, while the battery subsystem whose operating temperature exceeds the fast charging temperature range starts the non-fast charging mode, that is, the regular charging mode, which has a slower charging speed.

[0121] In some other embodiments proposed in this application, if the current device state indicates that the electronic device is in a discharging state, the voltage of the two batteries during the discharge process can be kept consistent. Different discharge rates can be used for synchronous discharge. To avoid voltage differences, a voltage equalization control mode between the first battery subsystem and the second battery subsystem can be activated so that the discharge voltage of the two batteries can be kept consistent.

[0122] Step S65: Adjust the battery protection circuit of the first battery subsystem to enter the open circuit state, disconnecting the charging path between the first battery and the system charger.

[0123] Based on the circuit structure described in the above electronic device embodiment, once it is determined that both battery subsystems have entered the charging state, such as... Figure 4 The electronic device shown can control the switch circuit S1 in the battery protection circuit configured in the first battery subsystem to enter the open state and the switch diode S0 to enter the open state, so that the battery protection circuit enters the open state, thus disconnecting the connection (i.e., the charging path) between the first battery and the system charger's system charging and discharging line.

[0124] Step S66: According to the equalization control logic corresponding to the activated charging mode, based on the dynamically obtained first and second operating parameters, control the first charger to charge the first battery, and the system charger and the second charger to charge the second battery, so as to maintain the voltage difference between the first battery and the second battery within the preset voltage range.

[0125] In practical applications, after the electronic device is first powered on after assembly, the voltage difference between the two battery subsystems may be greater than the preset voltage range. In order to ensure that the voltage of the two batteries is basically the same when the electronic device is charging but not fully charged and when charging is finished, a fast balancing logic can be adopted to ensure that the voltage of the two batteries can be balanced in a short time during the initial charging stage. This application does not limit the content of the balancing logic.

[0126] In this embodiment, by real-time monitoring of various operating parameters of the batteries in the two battery subsystems, it is determined whether the operating temperature of each battery supports fast charging. Based on this, the synchronous fast charging mode or asynchronous fast charging mode is started, and the equalization control logic corresponding to the charging mode (such as a synchronous algorithm or a control algorithm for fast charging of one battery and slow charging of another battery) is called to execute. The charging process of the two batteries is realized by using the dynamically obtained operating parameters.

[0127] In conjunction with the above description of the charging circuits for the two battery subsystems, the first charger refers to the independent charger for the first battery subsystem, enabling independent charging of the first battery; while the second charger refers to the charger for the second battery subsystem. Both the first and second chargers are powered by the system charger, enabling them to independently power the batteries in their respective battery subsystems. This facilitates the control of the two batteries using different charging rates, enabling synchronous / asynchronous fast charging of the two batteries, and ensuring that the voltage difference between the two synchronously fast-charging batteries is within a preset voltage range (such as 500mV). The implementation process will not be detailed in this application.

[0128] During the charging process, the second battery remains connected to the system charger, while the first battery is disconnected. The second battery can then power the electronic device system. As the charging time increases, the charge levels of both the first and second batteries increase. Once the voltage difference between the two batteries falls below a specific threshold, the first battery can be switched on to power the electronic device system, allowing both batteries to power the system simultaneously.

[0129] In summary, by monitoring the device status of electronic equipment and the operating parameters of the two battery subsystems, it can be determined whether the operating temperature of the two battery subsystems is within the fast charging temperature range. This allows for accurate determination of whether the battery in the battery subsystem should initiate fast charging mode. If both battery subsystems currently support fast charging, they can be controlled to charge synchronously, resolving the voltage drop caused by the FPC connection between the two battery subsystems and its impact on charging speed. Synchronizing the charging speed of the two batteries avoids the situation where one battery is fully charged while the other is not, saving charging time, and also addresses technical issues such as inconsistent battery voltage preventing one battery from quickly connecting to the system for power supply.

[0130] Furthermore, when the operating temperatures of the two batteries are inconsistent, the battery within the fast-charging temperature range can be controlled to enter fast-charging mode, while the charging current of the other battery with a higher temperature can be reduced, thus slowing down its charging speed. Compared to the current control method that determines the overall battery charging current based on the battery with the higher temperature, this application improves the overall charging speed of electronic devices and meets users' fast-charging needs by decoupling the operating temperatures and control circuits of the two batteries and adopting an asynchronous fast-charging mode for charging control.

[0131] Reference Figure 7 This is a flowchart illustrating another optional example of the control method proposed in this application. This embodiment can be a description of another optional refined implementation method of the control method described above, such as... Figure 7 As shown, this refined implementation method may include:

[0132] Step S71: Obtain the device status of the electronic device, as well as the first operating parameters of the first battery subsystem and the second operating parameters of the second battery subsystem in the electronic device;

[0133] Step S72: If the device status indicates that the electronic device is in a discharging state, start the voltage equalization control mode between the first battery subsystem and the second battery subsystem.

[0134] The implementation process of steps S71 and S72 can be referred to the description of the corresponding parts of the above embodiments, and will not be repeated here.

[0135] Step S73: Adjust the battery protection circuit of the first battery subsystem to enter the voltage equalization state.

[0136] Based on the description of the corresponding part of the above embodiment, after the electronic device system is started and not connected to an external power source for charging, the system will run in a discharging state. Based on the battery voltage difference between the two battery subsystems, it can be determined whether to connect the small-capacity battery to the electronic device system to supply power to the electronic device system. That is, it can be determined whether the switching circuit in the battery protection circuit is closed, so that the voltage equalization resistor connected to the switching circuit is in working state, thereby enabling the battery protection circuit to enter the voltage equalization state.

[0137] This application does not limit the implementation method of determining whether to activate the voltage balancing control mode based on the voltage difference between the two batteries. In practical applications of this application, if the electronic device is left unused for a long time, causing the discharge rate of the second battery to be too fast relative to the discharge rate of the first battery, resulting in an excessively high voltage in the first battery, the first battery will not be connected to the electronic device system, and the voltage balancing control mode will not need to be activated. This avoids the first battery being unable to meet the power requirements of the system, causing the electronic device system to malfunction after being powered on, thus reducing the user experience.

[0138] It should be noted that two batteries of different capacities in an electronic device need to be electrically connected so that both batteries can be powered off and charged simultaneously. This avoids the technical problem of the electronic device system failing to operate properly when only the first battery powers the system.

[0139] Furthermore, if the voltage of the first battery is greater than that of the second battery, but the voltage difference between them is within a certain range, the charges of the two batteries can be balanced first, i.e., voltage balancing control, before connecting the first battery to the system charger, i.e., connecting the first battery to the electronic device system. If the voltage difference between the two batteries is less than a specific voltage threshold, the first battery can be directly connected to the electronic device system.

[0140] Step S74: Obtain the dynamic voltage difference between the first battery voltage included in the first operating parameter and the second battery voltage included in the second operating parameter;

[0141] Step S75: Based on the dynamic voltage difference, control the second battery of the second battery subsystem to perform equalization charging between the first battery subsystem and the second battery of the first battery subsystem.

[0142] Step S76: Determine that the dynamic voltage difference is less than the first voltage threshold, adjust the battery protection circuit to enter the system power supply state, so that the first battery subsystem can be connected to the system charger and can supply power to the electronic equipment system.

[0143] Regarding the equalization charging between the first and second batteries, the higher-voltage battery can charge the lower-voltage battery to reduce the voltage difference between the two batteries. This application will not elaborate on the equalization charging control process. After the voltage equalization control of the two batteries determines that the dynamic voltage difference between the two batteries is less than a first voltage threshold, it can be considered that the voltages of the two batteries have reached an equal state. The first battery meets the conditions for accessing the system, and the battery protection circuit can be controlled to enter the system power supply state. For example, the switching circuit and switching diode of the battery protection circuit are turned on so that the output current of the first battery can be transmitted to the system charging / discharging line of the system charger, and then to the electronic equipment system to meet the system power demand.

[0144] Reference Figure 8 This is a flowchart illustrating another optional example of the control method proposed in this application. This embodiment can be described as another optional refined implementation of the control method described above. This embodiment can provide a more detailed description of the battery charging control process described above. Other control steps can be referred to the corresponding parts of the above embodiments, and will not be detailed here. Figure 8 As shown, the charging control process may include:

[0145] Step S81: Monitor the device status of the electronic device, as well as the first battery voltage of the first battery subsystem and the second battery voltage of the second battery subsystem;

[0146] Step S82: Determine that the electronic device is in a discharging state and that the voltage of the first battery is greater than that of the second battery, and obtain the dynamic voltage difference between the voltage of the first battery and the voltage of the second battery;

[0147] It should be understood that the electronic device system will only start and enter the discharge state when the voltage of the second battery meets the minimum operating voltage required for the system to operate, such as 3.6V.

[0148] Step S83: Determine that the dynamic voltage difference is greater than the second voltage threshold, adjust the battery protection circuit to enter the open circuit state, and output charging prompt information;

[0149] In this application, the dual-battery system of the electronic device consists of two relatively independent and mutually coordinated charging subsystems. When the system is powered, a master-slave architecture is adopted, that is, the second battery subsystem acts as the master power supply system and the first battery subsystem acts as the slave power supply system to ensure the reliable operation of the electronic device system. Moreover, the first battery of the first battery subsystem supports "hot-swapping", that is, the state changes such as the conduction and disconnection of the battery protection circuit can be controlled according to the device status and operating parameters to determine whether the first battery is independently powered by the first charger.

[0150] In this embodiment, when an electronic device is equipped with two battery subsystems, the first battery subsystem can be installed first, followed by the second battery subsystem, and then the electronic device system can be started. Because the two batteries have different capacities and the voltage drop caused by the FPC (Flexible Printed Circuit) will result in inconsistent voltages between the two batteries upon the first startup of the electronic device. To ensure reliable system operation, the first battery is not directly connected to the electronic device system. The method described in this embodiment can be used to determine when to connect the first battery to the system, but it is not limited to the control method described in this embodiment.

[0151] Based on the assembly method of the dual-battery system described above, this application solves the problems in current folding phone battery assembly and after-sales replacement applications where the high-voltage battery impacts the low-voltage battery due to the voltage difference between the two batteries. Furthermore, in cases where a small-capacity battery (i.e., the first battery) is assembled but a large-capacity battery (i.e., the second battery) is not, this application does not connect the first battery to the system. Thus, even if the operator accidentally powers on the folding phone, the system will not be powered and cannot be turned on. This solves the problem of directly connecting the small-capacity battery to the system, where its discharge current is insufficient to meet the current requirements of the entire folding phone system (including the display screen), resulting in the system being energized but unable to operate. Since this situation cannot be directly detected by the operator through the display screen, continuing to operate while energized can easily lead to device burn-out.

[0152] Step S84: Determine that the dynamic voltage difference is less than the third voltage threshold, and control the first battery to charge the second battery to achieve voltage balance between the first battery and the second battery.

[0153] Step S85: Determine that the absolute value of the dynamic voltage difference is less than the first voltage threshold, control the battery protection circuit to enter the voltage equalization state, and connect the first battery to the electronic device system for power supply.

[0154] Following the above description, if the voltage of the first battery is too high, the user can be prompted to charge the electronic device using the method described above. The charging control process can be referred to the corresponding section of the above embodiment. After synchronous / asynchronous fast charging of the two batteries, the voltage difference between the two batteries can usually be reduced to less than the first voltage threshold. Thus, upon completion of charging and entering the discharge state, the battery can be directly connected to the electronic device system as a secondary power supply to power the electronic device system.

[0155] When the first battery is not connected to the electronic device system and the second battery powers the electronic device, the second battery consumes more power, causing the voltage of the first battery to be greater than that of the second battery, and the dynamic voltage difference to be greater than the second voltage threshold. It is necessary to charge both batteries first according to the method described above. If the dynamic voltage difference is less than the third voltage threshold, that is, the voltage of the first battery is greater than that of the second battery within a certain range, the voltage of the two batteries can be balanced first. After the power of the two batteries is balanced, the first battery can be connected to the electronic device system.

[0156] It should be noted that this application does not impose any restrictions on the values ​​of the voltage thresholds involved in the context, and these can be determined as appropriate.

[0157] Step S86: Determine that the electronic device is in a powered-off state, the voltage of the first battery is less than the voltage of the second battery, and the absolute value of the corresponding dynamic voltage difference is greater than the fourth voltage threshold. Control the second battery to charge the first battery to achieve voltage balance between the first battery and the second battery.

[0158] When electronic devices are powered off and stored, the first battery may not be able to meet the power requirements for normal operation of the electronic device system. Therefore, if it is determined that the voltage of the first battery is lower than that of the second battery, and the absolute value of the dynamic voltage difference between the two is greater than a fourth voltage threshold (i.e., the voltages of the two batteries are unbalanced), the switch circuit S1 of the battery protection circuit can be turned off, and the second battery can supply power to the first battery, thus achieving a balance in the power of the two batteries. Similarly, this method can also be used to achieve voltage balance between the two batteries during assembly and after-sales maintenance.

[0159] As can be seen from the descriptions of the embodiments above, this application monitors the device status of the electronic device and the operating parameters of the two battery subsystems, such as battery voltage, charging current, operating temperature, and battery internal resistance, to determine the appropriate target control mode for the two battery subsystems under the current device status. Based on the dynamic parameter difference between the obtained first and second operating parameters, according to the equalization control logic corresponding to the target, the application determines the first charging control parameter for the first battery subsystem and the second charging control parameter for the second battery subsystem, such as their respective charge / discharge rates, thereby achieving relatively independent charging and discharging control of the two battery subsystems.

[0160] Subsequently, according to the first charging control parameters, the first charger can be controlled to charge the first battery of the first battery subsystem; according to the second charging control parameters, the system charger and the second charger can be controlled to charge the second battery of the second battery subsystem, thereby realizing synchronous / asynchronous fast charging of the two batteries, ensuring that the charging speed of the two batteries is consistent during synchronous fast charging, meeting the fast charging requirements of electronic devices, and avoiding technical problems such as current leakage caused by inconsistent voltages of the two batteries, thus ensuring the charging safety of electronic devices.

[0161] It should be noted that the two charging control parameters mentioned above may contain the same or different parameter types. Even if the two charging control parameters contain the same parameter types, the values ​​of the same type of charging control parameters may differ because the operating parameters of the two batteries are often different. The contents of the two charging control parameters can be determined according to the actual situation, which will not be detailed in this application.

[0162] Reference Figure 9 The diagram below shows an optional example of the control device proposed in this application. Figure 9 As shown, the device may include:

[0163] The data acquisition module 91 is used to acquire the device status of the electronic device, as well as the first operating parameters of the first battery subsystem and the second operating parameters of the second battery subsystem in the electronic device; wherein the first operating parameters include a first battery capacity that is less than the second operating parameters include a second battery capacity.

[0164] The target control mode determination module 92 is used to determine the target control mode for the first battery subsystem and the second battery subsystem based on the device status, the first operating parameter and the second operating parameter;

[0165] The voltage equalization control module 93 is used to adjust the charging mode of the first battery subsystem according to the target control mode, so as to achieve voltage equalization between the first battery subsystem and the second battery subsystem based on the dynamically obtained first operating parameters and second operating parameters.

[0166] The charging methods for the first battery subsystem include: an independent charging method for the first battery subsystem and a balanced charging method in which the second battery subsystem charges the first battery subsystem.

[0167] In some embodiments, such as Figure 10 As shown, the target control mode determination module 92 described above may include:

[0168] The operating temperature determination unit 921 is used to determine a first operating temperature included in the first operating parameter and a second operating temperature included in the second operating parameter when the device status characterizes that the electronic device is in a charging state.

[0169] The synchronous fast charging mode activation unit 922 is used to detect that both the first operating temperature and the second operating temperature are within the fast charging temperature range, and to activate the synchronous fast charging mode for the first battery subsystem and the second battery subsystem.

[0170] The asynchronous fast charging mode activation unit 923 is used to detect that the first operating temperature or the second operating temperature is within the fast charging temperature range, and activate the asynchronous fast charging mode for the first battery subsystem and the second battery subsystem.

[0171] In the asynchronous fast charging mode, battery subsystems whose operating temperature is within the fast charging temperature range start the fast charging mode, while battery subsystems whose operating temperature exceeds the fast charging temperature range start the non-fast charging mode.

[0172] The voltage equalization control mode activation unit 924 is used to activate the voltage equalization control mode between the first battery subsystem and the second battery subsystem when the device status indicates that the electronic device is in a discharging state.

[0173] In some other embodiments, such as Figure 10 As shown, the voltage equalization control module 93 described above may include:

[0174] The first adjustment unit 931 is used to adjust the battery protection circuit of the first battery subsystem to enter the open circuit state and disconnect the charging path between the first battery subsystem and the system charger when the target control mode indicates that both the first battery subsystem and the second battery subsystem have entered the charging state.

[0175] The first charging control unit 932 is used to control the first charger to charge the first battery of the first battery subsystem and the system charger and the second charger to charge the second battery of the second battery subsystem according to the equalization control logic corresponding to the target control mode, based on the dynamically obtained first operating parameters and second operating parameters, so as to maintain the voltage difference between the first battery and the second battery within a preset voltage range.

[0176] Wherein, the first charger refers to the charger of the first battery subsystem, the second charger refers to the charger of the second battery subsystem, and both the first charger and the second charger are powered by the system charger; the second battery powers the electronic device system.

[0177] The second adjustment unit 933 is used to adjust the battery protection circuit of the first battery subsystem to enter the voltage equalization state when the target control mode is the voltage equalization control mode; in the voltage equalization state, the voltage equalization resistor of the battery protection circuit is in the working state.

[0178] Dynamic voltage difference acquisition unit 934 is used to acquire the dynamic voltage difference between the first battery voltage included in the first operating parameter and the second battery voltage included in the second operating parameter;

[0179] The second charging control unit 935 is used to control the equalization charging between the second battery of the second battery subsystem and the first battery of the first battery subsystem based on the dynamic voltage difference.

[0180] The third adjustment unit 936 is used to determine that the dynamic voltage difference is less than the first voltage threshold, and adjust the battery protection circuit to enter the system power supply state so that the first battery subsystem can be connected to the system charger and can supply power to the electronic device system.

[0181] Optionally, the second charging control unit 935 may include:

[0182] A charging reminder unit is used to adjust the battery protection circuit to enter an open circuit state and output charging reminder information when the electronic device is in a discharging state, the voltage of the first battery is greater than the voltage of the second battery, and the corresponding dynamic voltage difference is greater than a second voltage threshold.

[0183] The third charging control unit is used to control the first battery of the first battery subsystem to charge the second battery of the second battery subsystem when the electronic device is in a discharging state, the voltage of the first battery is greater than the voltage of the second battery, and the corresponding dynamic voltage difference is less than a third voltage threshold.

[0184] The fourth charging control unit is used to control the second battery of the second battery subsystem to charge the first battery of the first battery subsystem when the electronic device is in a powered-off state, the voltage of the first battery is less than the voltage of the second battery, and the absolute value of the corresponding dynamic voltage difference is greater than a fourth voltage threshold.

[0185] In some other embodiments, both the first operating parameter and the second operating parameter include the battery voltage, charging current, operating temperature, and battery internal resistance of the corresponding battery subsystem, and the first charging control unit 932 may include:

[0186] The charging control parameter determination unit is used to determine, according to the equalization control logic corresponding to the target control mode, a first charging control parameter for the first battery subsystem and a second charging control parameter for the second battery subsystem based on the dynamic parameter difference between the obtained first operating parameter and the second operating parameter.

[0187] The fifth charging control unit is used to control the first charger to charge the first battery of the first battery subsystem according to the first charging control parameters.

[0188] The sixth charging control unit is used to control the system charger and the second charger to charge the second battery of the second battery subsystem according to the second charging control parameters.

[0189] It should be noted that the various modules and units in the above-mentioned device embodiments can all be stored in the memory as program modules. The processor executes the above-mentioned program modules stored in the memory to realize the corresponding functions. The functions realized by each program module and its combination, as well as the technical effects achieved, can be referred to the description of the corresponding part of the above-mentioned method embodiments. This embodiment will not repeat them here.

[0190] This application also provides a computer-readable storage medium on which a computer program can be stored, which can be invoked and loaded by a processor to implement the various steps of the control method described in the above embodiments.

[0191] Finally, it should be noted that, regarding the above embodiments, unless the context explicitly indicates an exception, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0192] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0193] The terms used in this application, such as "first" and "second," are for descriptive purposes only, used to distinguish one operation, unit, or module from another, and do not necessarily require or imply any such actual relationship or order between these units, operations, or modules. Furthermore, they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0194] The various embodiments in this specification are described in a progressive or parallel manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to mutually. For the apparatus and electronic devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to in the method section.

[0195] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control method, the method comprising: The device status of the electronic device is obtained, as well as the first operating parameters of the first battery subsystem and the second operating parameters of the second battery subsystem in the electronic device; wherein the first operating parameters include a first battery capacity that is less than the second operating parameters include a second battery capacity. Based on the device status, the first operating parameter, and the second operating parameter, a target control mode is determined for the first battery subsystem and the second battery subsystem. According to the target control mode, the charging mode of the first battery subsystem is adjusted so as to achieve voltage balance between the first battery subsystem and the second battery subsystem based on the dynamically obtained first and second operating parameters. The charging methods of the first battery subsystem include: an independent charging method for the first battery subsystem and a balanced charging method in which the second battery subsystem charges the first battery subsystem. The step of adjusting the charging mode of the first battery subsystem according to the target control mode, so as to achieve voltage balance between the first battery subsystem and the second battery subsystem based on the dynamically obtained first operating parameters and second operating parameters, includes: If the target control mode indicates that both the first battery subsystem and the second battery subsystem have entered the charging state, adjust the battery protection circuit of the first battery subsystem to enter the open circuit state, and disconnect the charging path between the first battery subsystem and the system charger. According to the equalization control logic corresponding to the target control mode, based on the dynamically obtained first and second operating parameters, the first charger is controlled to charge the first battery of the first battery subsystem, and the system charger and the second charger are controlled to charge the second battery of the second battery subsystem, so as to maintain the voltage difference between the first battery and the second battery within a preset voltage range. Wherein, the first charger refers to the charger of the first battery subsystem, the second charger refers to the charger of the second battery subsystem, and both the first charger and the second charger are powered by the system charger; the second battery powers the electronic device system.

2. The method according to claim 1, wherein determining the target control mode for the first battery subsystem and the second battery subsystem based on the device state, the first operating parameter, and the second operating parameter includes: If the device status indicates that the electronic device is in a charging state, determine the first operating temperature included in the first operating parameter and the second operating temperature included in the second operating parameter; If both the first operating temperature and the second operating temperature are detected to be within the fast charging temperature range, then a synchronous fast charging mode is initiated for the first battery subsystem and the second battery subsystem. If the first operating temperature or the second operating temperature is detected to be within the fast charging temperature range, an asynchronous fast charging mode is initiated for the first battery subsystem and the second battery subsystem; wherein, in the asynchronous fast charging mode, the battery subsystem whose operating temperature is within the fast charging temperature range initiates the fast charging mode, and the battery subsystem whose operating temperature exceeds the fast charging temperature range initiates the non-fast charging mode. If the device status indicates that the electronic device is in a discharging state, the voltage equalization control mode between the first battery subsystem and the second battery subsystem is activated.

3. The method according to claim 1 or 2, wherein adjusting the charging mode of the first battery subsystem according to the target control mode to achieve voltage balance between the first battery subsystem and the second battery subsystem based on dynamically obtained first and second operating parameters includes: If the target control mode is voltage equalization control mode, adjust the battery protection circuit of the first battery subsystem to enter the voltage equalization state. Under the voltage equalization state, the voltage equalization resistor of the battery protection circuit is in operation. The dynamic voltage difference between the first battery voltage included in the first operating parameter and the second battery voltage included in the second operating parameter is obtained; Based on the dynamic voltage difference, the second battery of the second battery subsystem and the first battery of the first battery subsystem are controlled to perform equal charging; Once the dynamic voltage difference is determined to be less than a first voltage threshold, the battery protection circuit is adjusted to enter the system power supply state, so that the first battery subsystem can be connected to the system charger and supply power to the electronic device system.

4. The method according to claim 3, wherein controlling the second battery of the second battery subsystem and the first battery of the first battery subsystem to perform mutual equalization charging based on the dynamic voltage difference comprises: If the electronic device is in a discharging state, the voltage of the first battery is greater than the voltage of the second battery, and the corresponding dynamic voltage difference is greater than the second voltage threshold, the battery protection circuit is adjusted to enter the open circuit state and a charging prompt message is output. If the electronic device is in a discharging state, the voltage of the first battery is greater than the voltage of the second battery, and the corresponding dynamic voltage difference is less than the third voltage threshold, the first battery of the first battery subsystem is controlled to charge the second battery of the second battery subsystem. If the electronic device is in a powered-off state, the voltage of the first battery is less than the voltage of the second battery, and the absolute value of the corresponding dynamic voltage difference is greater than the fourth voltage threshold, the second battery of the second battery subsystem is controlled to charge the first battery of the first battery subsystem.

5. The method according to claim 1, wherein the first operating parameter and the second operating parameter both include the battery voltage, charging current, operating temperature and battery internal resistance of the corresponding battery subsystem; The step of controlling the first charger to charge the first battery of the first battery subsystem, and the system charger and the second charger to charge the second battery of the second battery subsystem, according to the equalization control logic corresponding to the target control mode and based on the dynamically obtained first and second operating parameters, includes: According to the equalization control logic corresponding to the target control mode, based on the dynamic parameter difference between the obtained first operating parameter and the second operating parameter, the first charging control parameter for the first battery subsystem and the second charging control parameter for the second battery subsystem are determined. According to the first charging control parameters, the first charger is controlled to charge the first battery of the first battery subsystem; According to the second charging control parameters, the system charger and the second charger are controlled to charge the second battery of the second battery subsystem.

6. A control device, the device comprising: The data acquisition module is used to acquire the device status of the electronic device, as well as the first operating parameters of the first battery subsystem and the second operating parameters of the second battery subsystem in the electronic device; wherein the first operating parameters include a first battery capacity that is less than the second operating parameters include a second battery capacity. The target control mode determination module is used to determine the target control mode for the first battery subsystem and the second battery subsystem based on the device status, the first operating parameter and the second operating parameter; The voltage equalization control module is used to adjust the charging mode of the first battery subsystem according to the target control mode, so as to achieve voltage equalization between the first battery subsystem and the second battery subsystem based on the dynamically obtained first operating parameters and second operating parameters. The charging methods of the first battery subsystem include: an independent charging method for the first battery subsystem and a balanced charging method in which the second battery subsystem charges the first battery subsystem. The step of adjusting the charging mode of the first battery subsystem according to the target control mode, so as to achieve voltage balance between the first battery subsystem and the second battery subsystem based on the dynamically obtained first operating parameters and second operating parameters, includes: If the target control mode indicates that both the first battery subsystem and the second battery subsystem have entered the charging state, adjust the battery protection circuit of the first battery subsystem to enter the open circuit state, and disconnect the charging path between the first battery subsystem and the system charger. According to the equalization control logic corresponding to the target control mode, based on the dynamically obtained first and second operating parameters, the first charger is controlled to charge the first battery of the first battery subsystem, and the system charger and the second charger are controlled to charge the second battery of the second battery subsystem, so as to maintain the voltage difference between the first battery and the second battery within a preset voltage range. Wherein, the first charger refers to the charger of the first battery subsystem, the second charger refers to the charger of the second battery subsystem, and both the first charger and the second charger are powered by the system charger; the second battery powers the electronic device system.

7. An electronic device, comprising: A first battery subsystem, a second battery subsystem, a connector for realizing the circuit connection between the first battery subsystem and the second battery subsystem, a system charger, and a controller, wherein... The first battery subsystem is equipped with a battery protection circuit, which is used to connect or disconnect the first battery subsystem from the system charger to change the charging mode of the first battery subsystem. The second battery subsystem is connected to the system charger, and the system charger is connected to the electronic device system; the first battery capacity of the first battery subsystem is smaller than the second battery capacity of the second battery subsystem. The controller is connected to the first battery subsystem and the second battery system respectively, and is used to implement the control method as described in any one of claims 1-5.

8. The electronic device according to claim 7, wherein the first battery subsystem comprises a first battery, a first battery detection circuit, and a first charger; and the second battery subsystem comprises a second battery, a second battery detection circuit, and a second charger; The first battery detection circuit is connected to the first battery, the battery protection circuit, the first charger, and the controller, and is controlled by the controller to detect the first operating parameter of the first battery subsystem. The second battery detection circuit is connected to the second battery, the system charger, the second charger and the controller, and is controlled by the controller to detect the second operating parameters of the second battery subsystem. The battery protection circuit is connected to the first battery, the first charger, the system charger and the controller, and is controlled by the controller to disconnect the connection between the first battery and the system charger in the open circuit state, so that the first charger can charge the first battery. When the voltage is balanced, the first battery and the second battery are connected so that they can be charged in a balanced manner.

9. The electronic device according to claim 8, wherein the battery protection circuit comprises: The voltage balancing branch and the current flood prevention branch are connected in parallel, wherein: The voltage balancing branch includes a balancing resistor and a switching circuit. When the switching circuit is in the closed state, the battery protection circuit is determined to enter the voltage balancing state, so that the first battery is connected to the system charger. When the switching circuit is in the open state and the current anti-current branch is in the open-circuit state, the battery protection circuit is determined to enter the open-circuit state, so that the first battery is disconnected from the system charger. The current-prevention branch includes a unidirectional conduction component with its two ends connected to the first battery and the system charger, respectively, and the conduction direction of the unidirectional conduction component is from the first battery to the system charger.

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