Battery charging control method and device and storage medium

Abstract

The invention relates to a battery charging control method and device and a storage medium, and the method comprises the steps: monitoring the charge state of each battery in a plurality of batteries which are connected in parallel; in response to monitoring that the first battery with the charge state reaching the full charge state exists, determining battery information; and based on the battery information, charging control is carried out on the first battery and a second battery respectively until the first battery and the second battery reach a full charging condition, and the second battery is another battery different from the first battery. According to the invention, independent charging control of each battery in the parallel batteries is realized, and the full charging capacity of the batteries is increased.

Description

Technical Field

[0001] The present disclosure relates to the field of charging technology, and in particular to a battery charging control method, device and storage medium. Background Art

[0002] With the development of battery technology, a solution based on charging multiple batteries in parallel is provided, for example, two batteries in parallel.

[0003] When charging multiple batteries in parallel, impedance matching needs to be performed on the charging circuit between the power source and each battery cell to ensure that the charging capacities of different batteries are substantially the same when fully charged.

[0004] However, when charging multiple batteries in parallel, the consistency of charging capacity of different batteries is still not ideal. Summary of the invention

[0005] In order to overcome the problems existing in the related art, the present disclosure provides a battery charging control method, device and storage medium.

[0006] According to a first aspect of an embodiment of the present disclosure, a battery charging control method is provided, wherein the battery includes a plurality of batteries connected in parallel, and the battery charging control method includes:

[0007] respectively monitoring the state of charge of each battery in a plurality of batteries connected in parallel;

[0008] In response to monitoring the presence of a first battery whose state of charge reaches a fully charged state of charge, determining battery information;

[0009] Based on the battery information, charging of the first battery and the second battery is controlled respectively until the first battery and the second battery reach a full charge condition, and the second battery is a battery different from the first battery.

[0010] In one implementation, the battery information includes a battery full charge cut-off voltage, a battery full charge cut-off bias voltage, a first cell voltage of the first battery, and a second cell voltage of the second battery.

[0011] In one implementation, the charging control of the first battery and the second battery respectively based on the battery information includes:

[0012] Determine a magnitude relationship between a target cell voltage and a voltage difference, wherein the target cell voltage is a cell voltage having a maximum voltage value between the first cell voltage and the second cell voltage, and the voltage difference is a difference between a battery full charge cut-off voltage and a battery full charge cut-off bias voltage;

[0013] If the target cell voltage is the cell voltage of the first battery and the cell voltage of the first battery is greater than or equal to the voltage difference, stop charging the first battery and continue charging the second battery;

[0014] If the target cell voltage is less than the voltage difference, the first battery and the second battery are controlled to continue charging.

[0015] In one implementation, the controlling the first battery and the second battery to continue charging includes:

[0016] Increase the power supply voltage output by the power management chip and keep the battery main control chip continuously outputting the charging control signal;

[0017] Continue to monitor the charge states of the first battery and the second battery, and determine battery information, and based on the battery information, respectively control charging of the first battery and the second battery until both the first battery and the second battery reach full charge conditions.

[0018] In one embodiment, the method further comprises:

[0019] If it is monitored that the target cell voltage between the first cell voltage and the second cell voltage is greater than the battery full charge cut-off voltage, the power supply voltage output by the power management chip is reduced.

[0020] In one implementation, the continuing to charge the second battery includes:

[0021] If it is monitored that the charge state of the second battery reaches the fully charged state, and the second battery cell voltage is greater than the voltage difference and less than the battery full charge cut-off voltage, the power management chip is controlled to stop outputting the power supply voltage, and / or the battery main control chip is controlled to stop outputting the charging control signal.

[0022] According to a second aspect of an embodiment of the present disclosure, there is provided a charging control device, including:

[0023] A monitoring unit, configured to monitor the state of charge of each battery in the plurality of batteries;

[0024] A processing unit is used to determine battery information in response to monitoring the presence of a first battery whose state of charge reaches a fully charged state; based on the battery information, respectively control the charging of the first battery and the second battery until the first battery and the second battery both reach a fully charged condition, and the second battery is a battery other than the first battery.

[0025] In one implementation, the battery information includes a battery full charge cut-off voltage, a battery full charge cut-off bias voltage, a first cell voltage of the first battery, and a second cell voltage of the second battery;

[0026] The processing unit controls charging of the first battery and the second battery based on the battery information in the following manner:

[0027] Determine a magnitude relationship between a target cell voltage and a voltage difference, wherein the target cell voltage is a cell voltage having a maximum voltage value between the first cell voltage and the second cell voltage, and the voltage difference is a difference between a battery full charge cut-off voltage and a battery full charge cut-off bias voltage;

[0028] If the target cell voltage is the cell voltage of the first battery and the cell voltage of the first battery is greater than or equal to the voltage difference, stop charging the first battery and continue charging the second battery;

[0029] If the target cell voltage is less than the voltage difference, the first battery and the second battery are controlled to continue charging.

[0030] In one implementation, the processing unit controls the first battery and the second battery to continue charging in the following manner:

[0031] Increase the power supply voltage output by the power management chip and keep the battery main control chip continuously outputting the charging control signal;

[0032] Continue to monitor the charge states of the first battery and the second battery, and determine battery information, and based on the battery information, respectively control charging of the first battery and the second battery until both the first battery and the second battery reach full charge conditions.

[0033] In one implementation, the processing unit controls the first battery and the second battery to continue charging in the following manner:

[0034] If it is monitored that the target cell voltage between the first cell voltage and the second cell voltage is greater than the battery full charge cut-off voltage, the power supply voltage output by the power management chip is reduced.

[0035] In one implementation, the processing unit continues to charge the second battery in the following manner:

[0036] If it is monitored that the charge state of the second battery reaches the fully charged state, and the second battery cell voltage is greater than the voltage difference and less than the battery full charge cut-off voltage, the power management chip is controlled to stop outputting the power supply voltage, and / or the battery main control chip is controlled to stop outputting the charging control signal.

[0037] According to a third aspect of an embodiment of the present disclosure, a terminal device is provided, including:

[0038] processor;

[0039] a memory for storing processor-executable instructions;

[0040] The processor is configured to execute the executable instructions to execute the battery charging control method in the first aspect or any one of the embodiments of the first aspect.

[0041] According to a fourth aspect of an embodiment of the present disclosure, a storage medium is provided, in which instructions are stored. When the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the battery charging control method in the first aspect or any one of the embodiments of the first aspect.

[0042] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by acquiring the charge state of each battery in parallel and monitoring the presence of a full charge state, the charging of each battery in parallel is controlled separately based on the current battery information instead of stopping charging, thereby achieving independent charging control of each battery in the parallel battery and increasing the battery full charge capacity.

[0043] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0045] Figure 1 The figure is a flow chart of a battery charging control method according to an exemplary embodiment.

[0046] Figure 2 The figure is an example diagram showing battery information according to an exemplary embodiment.

[0047] Figure 3 The figure is a flow chart showing charging the first battery and the second battery respectively according to an exemplary embodiment.

[0048] Figure 4 The present invention is a flowchart showing the method of controlling the first battery and the second battery to continue charging according to an exemplary embodiment.

[0049] Figure 5The flowchart of another method for continuously charging the first battery and the second battery is shown according to an exemplary embodiment.

[0050] Figure 6 The figure is a flow chart showing a method for charging the second battery according to an exemplary embodiment.

[0051] Figure 7 The present invention is a block diagram of a battery and whole machine coordinated charging control device according to an exemplary embodiment.

[0052] Figure 8 The figure is a flow chart showing a battery charging control method for two parallel batteries according to an exemplary embodiment.

[0053] Fig. 9 The invention is a block diagram of a device for controlling battery charging according to an exemplary embodiment.

[0054] Fig.10 The invention is a block diagram of a device for controlling battery charging according to an exemplary embodiment. DETAILED DESCRIPTION

[0055] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure.

[0056] The battery charging control method provided in the embodiments of the present disclosure is applied to the scenario of controlling the charging of the battery. For example, it is applied to the scenario of controlling the charging of the battery in terminal devices such as smart phones and tablets. The battery charging control method involved in the embodiments of the present disclosure is mainly applied to the scenario of controlling the charging of multiple batteries connected in parallel. For example, it is applied to the scenario of controlling the charging of 2 parallel batteries. Among them, 2 parallel batteries can be understood as two batteries connected in parallel.

[0057] In the battery charging control method in the related art, when the battery of the terminal device is fully charged, the charging is cut off according to the battery information such as voltage and current. In the battery charging control process, a power management chip (Power Management IC, PMIC) is used to provide power input to charge the battery. When the power management chip detects that the battery voltage and current meet the full charge cut-off condition, the power supply voltage is stopped, thereby stopping charging. However, due to the line impedance on the charging circuit and the prevention of battery overcharging, the battery voltage is low after charging is stopped, and the charging capacity is small.

[0058] Furthermore, for multiple batteries connected in parallel, there is a charging circuit between the battery cell of each battery in the multiple batteries and the battery mainboard. There is a line impedance on the charging circuit. Moreover, there are inconsistencies in the line impedances on different charging circuits. In order to ensure the charging capacity of different batteries and achieve charging voltage matching, impedance matching of the charging circuit is required. However, when charging parallel batteries, the impedance matching of the charging circuits of each battery cannot be completely consistent. In this way, when charging is stopped, there will be a situation where the voltages of each battery are inconsistent, that is, the voltage matching effect is not ideal, resulting in a certain loss of charging capacity.

[0059] In view of this, the present disclosure provides a parallel battery charging control method, which performs independent charging control on the parallel batteries, so that charging control can be performed without the need to fully match the charging loop impedance to ensure the full charging capacity of each battery.

[0060] In an exemplary embodiment of the present disclosure, charging control is performed based on the state of charge (SOC) of the battery and in combination with battery information.

[0061] The implementation process of the battery charging control method in the embodiment of the present disclosure is described below.

[0062] Figure 1 is a flow chart of a battery charging control method according to an exemplary embodiment. Figure 1 As shown, the battery charging control method includes the following steps.

[0063] In step S11 , the state of charge of each battery in the plurality of batteries connected in parallel is monitored respectively.

[0064] In an exemplary embodiment of the present disclosure, based on a power management chip, the power management chip outputs a total current during charging, which flows into each battery of the parallel battery respectively, and at the end of charging, the power management chip continuously reads the charge state of each battery through the management bus (Intel-Integrated Circuitbus, I2C) communication. For example, the charge state of each battery in the multiple batteries can be obtained through a fuel gauge.

[0065] In step S12 , in response to monitoring the presence of the first battery whose state of charge reaches the fully charged state of charge, battery information is determined.

[0066] In an exemplary embodiment of the present disclosure, the first battery can be understood as a battery whose state of charge reaches a fully charged state during the charging process. The number of the first battery can be one or more.

[0067] The battery information involved in the embodiments of the present disclosure can be understood as parameter information involved in the battery charging process, which can be real-time dynamic battery information, such as real-time charging cell voltage, current and other information. It can also be fixed battery information used in the battery charging control process, such as fixed charging parameters such as the battery full charge cut-off voltage set in the power management chip.

[0068] In step S13, based on the battery information, charging control is performed on the first battery and the second battery respectively until both the first battery and the second battery reach full charging conditions.

[0069] In the embodiment of the present disclosure, the second battery is another battery different from the first battery among the multiple batteries under charge control. The number of the second battery can be one or more.

[0070] In an exemplary embodiment of the present disclosure, charging control is performed on the first battery and the second battery respectively, so as to realize independent charging control of a single battery in the parallel battery.

[0071] The battery charging control method provided by the embodiment of the present disclosure obtains the charge state of each battery in parallel, and when it detects that the charge state is fully charged, it continues to control the charging of each battery in parallel based on the current battery information instead of stopping charging, thereby realizing independent charging control of each battery in the parallel battery and increasing the battery full charge capacity.

[0072] Embodiments of the Disclosure The following describes a charging control method according to an embodiment of the disclosure.

[0073] In an exemplary embodiment of the present disclosure, the parallel battery charging control includes performing charging control on each battery in parallel based on battery information of each battery during the charging control process, that is, implementing charging control on the first battery and the second battery.

[0074] The battery information involved in the embodiments of the present disclosure includes but is not limited to the following: the battery full charge cut-off voltage (Vbat_Full), the battery full charge cut-off bias voltage (Vbat_Delta), the cell voltages of the batteries connected in parallel (for example, the first cell voltage of the first battery and the second cell voltage of the second battery), etc.

[0075] Figure 2 is an example diagram showing an acquired battery information according to an exemplary embodiment, such as Figure 2 As shown, the battery information includes one or more of a battery full charge cut-off voltage, a battery full charge cut-off bias voltage, a first cell voltage of a first battery, and a second cell voltage of a second battery.

[0076] The disclosed embodiments perform charging control based on battery information such as the battery state of charge, the battery full charge cut-off voltage, the battery full charge cut-off bias voltage, and the cell voltage, so as to achieve charging control that does not completely rely on fixed parameters set by the power management chip, such as stopping charging, increasing the battery voltage after charging, and increasing the charging capacity.

[0077] Figure 3 is a flow chart of a method for controlling charging of a first battery and a second battery respectively according to an exemplary embodiment. Figure 3 As shown, the following steps are included:

[0078] In step S21, the magnitude relationship between the target cell voltage and the voltage difference is determined.

[0079] In the embodiment of the present disclosure, the target cell voltage is the cell voltage with the largest voltage value between the first cell voltage and the second cell voltage, which can be expressed as Max(Vbat1, Vbat2), wherein Vbat1 is the first cell voltage of the first battery, and Vbat2 is the second cell voltage of the second battery.

[0080] In the disclosed embodiment, the voltage difference is the difference between the battery full charge cut-off voltage and the battery full charge cut-off bias voltage, which can be expressed as Vbat_Full-Vbat_Delta, where Vbat_Full is the battery full charge cut-off voltage, and Vbat_Delta is the battery full charge cut-off bias voltage.

[0081] In step S22a, if the target cell voltage is the cell voltage of the first battery and the cell voltage of the first battery is greater than or equal to the voltage difference, charging of the first battery is stopped and charging of the second battery continues.

[0082] In the disclosed embodiment, the target cell voltage is the cell voltage of the first battery. Since the state of charge of the first battery has reached the fully charged state, and the cell voltage of the first battery is greater than the difference between the battery full charge cut-off voltage and the battery full charge cut-off bias voltage, it means that the first battery is fully charged, so the charging of the first battery is stopped. However, since the full charge state of the second battery is still uncertain, usually it has not reached full charge, the second battery continues to be charged.

[0083] In step S22b, if the target cell voltage is less than the voltage difference, the first battery and the second battery are controlled to continue charging.

[0084] In the embodiment of the present disclosure, the target cell voltage is less than the voltage difference, indicating that both the first battery and the second battery are not fully charged, and therefore the first battery and the second battery need to continue to be charged.

[0085] In the disclosed embodiment, by determining whether the maximum battery cell voltage among the battery cell voltage of the first battery and the battery cell voltage of the second battery is greater than or equal to the voltage difference, the target battery that has reached a fully charged state and the battery that has not reached a fully charged state can be accurately determined, thereby enabling precise battery charging control.

[0086] In an exemplary embodiment of the present disclosure, the cell voltage of the target battery is the cell voltage with the largest voltage value between the first cell voltage and the second cell voltage. The cell voltage state of the target battery is monitored to determine whether the cell voltage state of the target battery satisfies the cell voltage in a fully charged state, and the cell voltage in a fully charged state is the difference between the battery full charge cut-off voltage and the battery full charge cut-off bias voltage, which is equal to the monitored cell voltage of the target battery.

[0087] Figure 4 FIG. 1 is a flow chart showing a method for controlling the first battery and the second battery to continue charging according to an exemplary embodiment. Figure 4 As shown, the following steps are included:

[0088] In step S31 , the power management chip outputs a voltage power supply.

[0089] In an exemplary embodiment of the present disclosure, the power management chip outputs current, which flows into each battery in the parallel-connected batteries through each charging circuit.

[0090] In step S32, the power supply voltage output by the power management chip is increased, and the battery main control chip is kept to continuously output the charging control signal.

[0091] In the exemplary embodiment of the present disclosure, the power management chip outputs the power supply voltage, which flows into each battery through the charging circuit to continuously charge each battery. At the end of charging, the power management chip obtains the power meter information and the battery charging signal. The charging control signal is controlled by the parallel battery master chip to keep each battery connected in parallel at a low level.

[0092] In step S33, the charge states of the first battery and the second battery are continuously monitored, and battery information is determined. Based on the battery information, charging of the first battery and the second battery is controlled respectively until both the first battery and the second battery reach full charge conditions.

[0093] In an exemplary embodiment of the present disclosure, continuing to monitor the charge states of the first battery and the second battery indicates that both the first battery and the second battery are not fully charged, so it is necessary to determine battery information based on the detected charge states of the first battery and the second battery, and continue to perform charging control for the first battery and the second battery respectively.

[0094] In the embodiment of the present disclosure, based on the power management chip, when the parallel batteries do not meet the full charge state condition, that is, the first cell voltage of the first battery and the second cell voltage of the second battery are both less than the difference between the battery full charge cut-off voltage and the battery full charge cut-off bias voltage, the power management chip continues to supply current to implement independent charging control for the first battery and the second battery.

[0095] Figure 5 FIG. 1 is a flow chart showing another method for controlling the first battery and the second battery to continue charging according to an exemplary embodiment. Figure 5 As shown, the following steps are included:

[0096] In step S41, if the target cell voltage between the monitored first cell voltage and the second cell voltage is greater than the battery full charge cut-off voltage, the power supply voltage output by the power management chip is reduced.

[0097] In an exemplary embodiment of the present disclosure, the first battery and the second battery are charged based on a power management chip, and based on monitoring that a target cell voltage between the first cell voltage and the second cell voltage is greater than a battery full charge cut-off voltage, further charging control is performed through the power management chip.

[0098] In step S42, the power supply voltage output by the power management chip is reduced.

[0099] In an exemplary embodiment of the present disclosure, based on the target cell voltage between the monitored first cell voltage and the second cell voltage being greater than the battery full charge cut-off voltage, the gear voltage is downwardly adjusted through the power management chip to reduce the power supply voltage output by the power management chip, and the charging signal of the battery is controlled based on the main control chip to keep the target battery in a high level state.

[0100] In an exemplary embodiment of the present disclosure, based on the monitoring that the first battery cell voltage and the second battery cell voltage are greater than the full charge cut-off voltage, charging control is performed on the parallel batteries to improve the situation where the batteries do not meet the full charge requirement during the charging process.

[0101] Figure 6 is a flow chart showing a method for continuing to charge a second battery according to an exemplary embodiment. Figure 6 As shown, the following steps are included:

[0102] In step S51, the power management chip outputs current to the second battery.

[0103] In the embodiment of the present disclosure, based on the first battery reaching a fully charged state, that is, the state of charge of the first battery reaches a fully charged state and the cell voltage of the first battery is equal to the difference between the battery cut-off voltage and the battery cut-off bias voltage, the power management chip outputs current to the second battery, and the power management chip outputs current to the second battery, flows into the second battery through the charging circuit, and reads the battery information of the second battery through the power management chip based on I2C communication at the charging end. Among them, the second battery output current is used to determine whether the state of charge of the second battery has reached a fully charged state.

[0104] In step S52, if it is monitored that the state of charge of the second battery reaches the fully charged state, and the second cell voltage is greater than the voltage difference and less than the battery full charge cut-off voltage.

[0105] In the embodiment of the present disclosure, the fully charged state means that the state of charge is 100%.

[0106] In step S53, the power management chip is controlled to stop outputting the power voltage, and / or the battery main control chip is controlled to stop outputting the charging control signal.

[0107] In the disclosed embodiment, the power management chip continues to output current to maintain charging. When the cell voltage of the second battery is greater than the full charge voltage difference and less than the full charge cut-off voltage, the power management chip adjusts the gear voltage upward, and the main control chip controls the battery charging control signal to keep the second battery in a high level state.

[0108] The following uses two parallel batteries as an example to illustrate the battery charging control method involved in the embodiment of the present disclosure.

[0109] Figure 7 FIG. 1 is a schematic diagram showing a battery charging control method for two parallel batteries according to an exemplary embodiment. Figure 7 As shown, PMIC is a power management chip and CPU is a main control chip.

[0110] In one embodiment, if Figure 7 As shown, when charging starts, the PMIC outputs the total current, which enters battery 1 and battery 2 through two charging loops. At the end of charging, the PMIC continuously reads the battery information of the two batteries through the charging signal (I2C) communication, including the state of charge (SOC), voltage, current, temperature and other information, and then determines whether the two batteries are fully charged. The battery charging control receiving points (CTL1 and CTL2) are respectively connected to the CPU's battery 1 charging control signal (GPIO_BAT1) and battery 2 charging control signal (GPIO_BAT2). When any of the batteries reaches the full charge condition, the CPU will pull up CTL1 or CTL2 to turn off the charging MOS tube, thereby realizing the control of stopping the full charge of a single battery.

[0111] Figure 8 It is a flowchart of a battery charging control method for a two - parallel battery according to an exemplary embodiment as shown. As Figure 8 shown.

[0112] In one implementation, the power management chip outputs the total current, which flows into each battery through the charging circuit respectively, and reads the state of charge (SOC) of each battery. Based on the SOCs of each battery read, the state of charge of any one battery when it is in a fully - charged state (SOC = 100%) is determined as the first battery. The power management chip reads the first cell voltage (Vbat1) of the first battery and the second cell voltage (Vbat2) of the second battery, and determines whether the maximum cell voltage is less than or equal to the difference between the battery full - charge cut - off voltage (Vbat_Full) and the full - charge cut - off bias voltage (Vbat_Delta) according to the read first cell voltage (Vbat1) of the first battery and the second cell voltage (Vbat2) of the second battery (Max(Vbat1, Vbat2) < Vbat_Full - Vbat_Delta). If the battery cell voltage is less than the difference between the battery full - charge cut - off voltage and the full - charge cut - off bias voltage, the power management chip adjusts the gear voltage (Pmic_Voltage) upward, and the main control chip (CPU) keeps the first - battery charging control signal (GPIO_BAT1) and the second - battery charging control signal (GPIO_BAT2) at a low - level state. If the battery cell voltage is equal to the difference between the battery full - charge cut - off voltage and the full - charge cut - off bias voltage (Max(Vbat1, Vbat2) = Vbat_Full - Vbat_Delta), it is determined whether the battery with the maximum cell voltage is the cell voltage of the first battery (SOC(Max(Vbat1, Vbat2)) = 100%). If the battery with the maximum cell voltage is the cell voltage of the first battery, the main control chip keeps the first battery at a high - level state and ends the charging of the first battery; if the battery with the maximum cell voltage is not the cell voltage of the first battery, the power management chip continues to output current to keep charging. If the battery cell voltage is greater than the difference between the battery full - charge cut - off voltage and the full - charge cut - off bias voltage (Max(Vbat1, Vbat2) > Vbat_Full - Vbat_Delta), the power management chip adjusts the gear voltage (Pmic_Voltage) downward until the battery cell voltage is equal to the difference between the battery full - charge cut - off voltage and the full - charge cut - off bias voltage.

[0113] In one implementation, when the first battery stops charging, the second battery is charged using the same charging logic. The power management chip outputs current to the second battery and reads the state of charge of the second battery to determine whether the state of charge of the second battery is the state of charge in the fully charged state (SOC2 = 100%). If the state of charge of the second battery is the state of charge in the fully charged state, then it is determined whether the cell voltage of the second battery is greater than the difference between the battery full charge cut-off voltage and the full charge cut-off offset voltage and less than the battery full charge cut-off voltage (Vbat_Full - Vbat_Delta < Vbat2 < Vbat_Full). If the cell voltage of the second battery is greater than the difference between the battery full charge cut-off voltage and the full charge cut-off offset voltage and less than the battery full charge cut-off voltage, the main control chip keeps the second battery in a high level state, or the power management chip stops supplying current. If the cell voltage of the second battery does not satisfy being greater than the difference between the battery full charge cut-off voltage and the full charge cut-off offset voltage and less than the battery full charge cut-off voltage, the power management chip adjusts the gear voltage (Pmic_Voltage) upward, and the main control chip keeps the second battery charging control signal (GPIO_BAT2) in a low level state.

[0114] The battery charging control method provided by the embodiments of the present disclosure obtains the state of charge of each parallel-connected battery through a power management chip, and obtains battery information by receiving the cell voltage read by a battery fuel gauge. The charge state of the battery in the fully charged state is judged according to the battery information, and the battery with the charge state in the fully charged state is set as the first battery, and the maximum cell voltage based on the first battery voltage and the second battery voltage is set as the target battery cell voltage. Based on the judgment of the target battery, the charging of the first battery is completed, without completely relying on the fixed parameters set by the power management chip to stop charging, realizing independent charging control of each battery in the parallel-connected batteries, and increasing the full charge capacity of the battery.

[0115] Based on the same concept, the embodiments of the present disclosure also provide a battery charging control device.

[0116] It can be understood that in order to implement the above functions, the power supply device provided by the embodiments of the present disclosure includes the corresponding hardware structure and / or software module for executing each function. Combining the units and algorithm steps of the examples disclosed in the embodiments of the present disclosure, the embodiments of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraint conditions of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiments of the present disclosure.

[0117] Fig. 9is a block diagram of a device for battery charging control according to an exemplary embodiment. Fig. 9 The device 100 includes a monitoring unit 101 and a processing unit 102.

[0118] The monitoring unit 101 is used to monitor the charge state of each battery in the plurality of batteries connected in parallel;

[0119] The processing unit 102 is used to determine battery information in response to monitoring the presence of a first battery whose charge state reaches a fully charged state; based on the battery information, respectively control the charging of the first battery and the second battery until both the first battery and the second battery reach a fully charged condition, and the second battery is a battery other than the first battery.

[0120] In some embodiments, the battery information includes a battery full charge cut-off voltage, a battery full charge cut-off bias voltage, a first cell voltage of the first battery, and a second cell voltage of the second battery.

[0121] In some embodiments, the processing unit 102 controls the charging of the first battery and the second battery respectively based on the battery information in the following manner: determine the size relationship between the target cell voltage and the voltage difference, the target cell voltage is the cell voltage with the largest voltage value between the first cell voltage and the second cell voltage, and the voltage difference is the difference between the battery full charge cut-off voltage and the battery full charge cut-off bias voltage; if the target cell voltage is the cell voltage of the first battery and the cell voltage of the first battery is greater than or equal to the voltage difference, stop charging the first battery and continue charging the second battery; if the target cell voltage is less than the voltage difference, control the first battery and the second battery to continue charging.

[0122] In some embodiments, the processing unit 102 controls the continued charging of the first battery and the second battery in the following manner: increasing the power supply voltage output by the power management chip, and maintaining the battery main control chip to continuously output a charging control signal; continuing to monitor the charge state of the first battery and the second battery, and determining the battery information, and based on the battery information, respectively controlling the charging of the first battery and the second battery until both the first battery and the second battery reach full charging conditions.

[0123] In some embodiments, the processing unit 102 controls the continued charging of the first battery and the second battery in the following manner: if it is monitored that the target cell voltage between the first cell voltage and the second cell voltage is greater than the battery full charge cut-off voltage, the power supply voltage output by the power management chip is reduced.

[0124] In some embodiments, the processing unit 102 continues to charge the second battery in the following manner: if it is monitored that the charge state of the second battery reaches a fully charged state, and the second battery cell voltage is greater than the voltage difference and less than the battery full charge cut-off voltage, the power management chip is controlled to stop outputting the power supply voltage, and / or the battery main control chip is controlled to stop outputting the charging control signal.

[0125] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0126] Fig.10 1 is a block diagram of an apparatus 200 for battery charging control according to an exemplary embodiment. For example, the apparatus 200 may be provided as a terminal. For example, it may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0127] Reference Fig.10 , the device 200 may include one or more of the following components: a processing component 202 , a memory 204 , a power component 206 , a multimedia component 208 , an audio component 210 , an input / output (I / O) interface 212 , a sensor component 214 , and a communication component 216 .

[0128] The processing component 202 generally controls the overall operation of the device 200, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 202 may include one or more processors 220 to execute instructions to perform all or part of the steps of the above-described method. In addition, the processing component 202 may include one or more modules to facilitate interaction between the processing component 202 and other components. For example, the processing component 202 may include a multimedia module to facilitate interaction between the multimedia component 208 and the processing component 202.

[0129] The memory 204 is configured to store various types of data to support operations on the device 200. Examples of such data include instructions for any application or method operating on the device 200, contact data, phone book data, messages, pictures, videos, etc. The memory 204 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0130] The power component 206 provides power to the various components of the device 200. The power component 206 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 200.

[0131] The multimedia component 208 includes a screen that provides an output interface between the device 200 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also monitor the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 208 includes a front camera and / or a rear camera. When the device 200 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0132] The audio component 210 is configured to output and / or input audio signals. For example, the audio component 210 includes a microphone (MIC), and when the device 200 is in an operation mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 204 or sent via the communication component 216. In some embodiments, the audio component 210 also includes a speaker for outputting audio signals.

[0133] I / O interface 212 provides an interface between processing component 202 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0134] The sensor assembly 214 includes one or more sensors for providing various aspects of status assessment for the device 200. For example, the sensor assembly 214 can monitor the open / closed state of the device 200, the relative positioning of components, such as the display and keypad of the device 200, the sensor assembly 214 can also monitor the position change of the device 200 or a component of the device 200, the presence or absence of user contact with the device 200, the orientation or acceleration / deceleration of the device 200 and the temperature change of the device 200. The sensor assembly 214 may include a proximity sensor configured to monitor the presence of nearby objects without any physical contact. The sensor assembly 214 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 214 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor.

[0135] The communication component 216 is configured to facilitate wired or wireless communication between the device 200 and other devices. The device 200 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 216 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 216 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0136] In an exemplary embodiment, the apparatus 200 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above method.

[0137] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 204 including instructions, and the instructions can be executed by the processor 220 of the device 200 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0138] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0139] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0140] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

[0141] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0142] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modifications, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure.

[0143] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A battery charging control method, characterized in that: The battery charging control method comprises: respectively monitoring the state of charge of each battery in a plurality of batteries connected in parallel; In response to monitoring the presence of a first battery whose state of charge reaches a fully charged state of charge, determining battery information; Based on the battery information, charging of the first battery and the second battery is controlled respectively until the first battery and the second battery reach a full charge condition, and the second battery is a battery different from the first battery.

2. The method according to claim 1, characterized in that: The battery information includes a battery full-charge cut-off voltage, a battery full-charge cut-off bias voltage, a first cell voltage of the first battery, and a second cell voltage of the second battery.

3. The method according to claim 2, characterized in that The controlling charging of the first battery and the second battery respectively based on the battery information includes: Determine a magnitude relationship between a target cell voltage and a voltage difference, wherein the target cell voltage is a cell voltage having a maximum voltage value between the first cell voltage and the second cell voltage, and the voltage difference is a difference between a battery full charge cut-off voltage and a battery full charge cut-off bias voltage; If the target cell voltage is the cell voltage of the first battery and the cell voltage of the first battery is greater than or equal to the voltage difference, stop charging the first battery and continue charging the second battery; If the target cell voltage is less than the voltage difference, the first battery and the second battery are controlled to continue charging.

4. The method according to claim 3, characterized in that The controlling the first battery and the second battery to continue charging includes: Increase the power supply voltage output by the power management chip and keep the battery main control chip continuously outputting the charging control signal; Continue to monitor the charge states of the first battery and the second battery, and determine battery information, and based on the battery information, respectively control charging of the first battery and the second battery until both the first battery and the second battery reach full charge conditions.

5. The method according to claim 3 or 4, characterized in that: The method further comprises: If it is monitored that the target cell voltage between the first cell voltage and the second cell voltage is greater than the battery full charge cut-off voltage, the power supply voltage output by the power management chip is reduced.

6. The method according to claim 3, characterized in that The continuing to charge the second battery comprises: If it is monitored that the charge state of the second battery reaches the fully charged state, and the second battery cell voltage is greater than the voltage difference and less than the battery full charge cut-off voltage, the power management chip is controlled to stop outputting the power supply voltage, and / or the battery main control chip is controlled to stop outputting the charging control signal.

7. A battery charging control device, characterized in that: include: A monitoring unit, used to monitor the state of charge of each battery in the plurality of batteries connected in parallel; A processing unit is used to determine battery information in response to monitoring the presence of a first battery whose state of charge reaches a fully charged state; based on the battery information, respectively control the charging of the first battery and the second battery until the first battery and the second battery both reach a fully charged condition, and the second battery is a battery other than the first battery.

8. The device according to claim 7, wherein the battery information comprises a battery full charge cut-off voltage, a battery full charge cut-off bias voltage, a first cell voltage of the first battery, and a second cell voltage of the second battery; The processing unit controls charging of the first battery and the second battery based on the battery information in the following manner: Determine a magnitude relationship between a target cell voltage and a voltage difference, wherein the target cell voltage is a cell voltage having a maximum voltage value between the first cell voltage and the second cell voltage, and the voltage difference is a difference between a battery full charge cut-off voltage and a battery full charge cut-off bias voltage; If the target cell voltage is the cell voltage of the first battery and the cell voltage of the first battery is greater than or equal to the voltage difference, stop charging the first battery and continue charging the second battery; If the target cell voltage is less than the voltage difference, the first battery and the second battery are controlled to continue charging.

9. A terminal device, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to execute the executable instructions to implement the steps of the battery charging control method according to any one of claims 1 to 6.

10. A storage medium, characterized in that: The storage medium stores instructions, and when the instructions in the storage medium are executed by a processor of the terminal, the terminal is enabled to execute the method according to any one of claims 1 to 6.

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