Charging System, Method, Device and Terminal Device

Abstract

The present disclosure relates to a charging system, method, device, and terminal device, belonging to the field of charging technologies. Among them, the charging system includes: a first battery, a second battery, a charging component, and a control component. The capacity of the second battery is smaller than that of the first battery, and it includes a battery cell and a switching component connected to the battery cell. The charging component is connected to the first battery and is connected to the second battery through the switching component, and is configured to output a charging current to the first battery and the second battery. The control component is connected to the first battery and the second battery, and is configured to detect the power levels of the first battery and the second battery during the charging process and control the on / off of the switching component according to the power levels.

Description

Technical Field

[0001] The present disclosure relates to the field of charging technologies, and in particular, to a charging system, method, device, and terminal device. Background Art

[0002] A charging system is an important part of a terminal device and is used to store the energy provided by an external power supply in a battery to maintain the normal use of the terminal device. Usually, in order to improve the battery life of the terminal device, a large-capacity battery is adopted. However, the capacitance of the battery affects the volume of the battery, and the larger the capacity, the larger the volume. Therefore, using a large-capacity battery will increase the installation difficulty of the charging system inside the terminal device. Summary of the Invention

[0003] The present disclosure provides a charging system, method, device, and terminal device to solve the defect of large installation difficulty of the battery module in the related art.

[0004] In a first aspect, an embodiment of the present disclosure provides a charging system, which includes:

[0005] A first battery;

[0006] A second battery with a capacity smaller than that of the first battery, including a battery cell and a switch component connected to the battery cell;

[0007] A charging component, connected to the first battery and connected to the second battery through the switch component, for outputting a charging current to the first battery and the second battery; and

[0008] A control component, connected to the first battery and the second battery, for detecting the power of the first battery and the second battery during the charging process and controlling the on / off of the switch component according to the power.

[0009] In one embodiment, the control component includes:

[0010] A first fuel gauge, disposed inside the first battery and connected to the battery cell of the first battery, for detecting the battery cell voltage and charging current of the first battery; and

[0011] A processor, connected to the first fuel gauge, for determining the power of the first battery according to the battery cell voltage and charging current.

[0012] In one embodiment, the control component further includes:

[0013] A second fuel gauge, disposed inside the second battery and connected to the battery cell of the second battery, for detecting the battery cell voltage and charging current of the second battery;

[0014] The processor is also connected to the second coulombmeter, and is configured to determine the power of the second battery according to the cell voltage and the charging current, and control the on / off of the switching element according to the powers of the first battery and the second battery.

[0015] In one embodiment, the on-resistance of the switching element is less than or equal to 2 milliohms.

[0016] In a second aspect, an embodiment of the present disclosure provides a charging method, which is applied to the charging system described in the first aspect. The method includes:

[0017] Obtaining the powers of the first battery and the second battery during the charging process;

[0018] In response to the power of the second battery increasing to a first preset threshold, controlling the switching element to disconnect the connection between the second battery and the charging component, and keeping the charging component charging the first battery;

[0019] In response to the power of the first battery increasing to a second preset threshold, controlling the switching element to connect the second battery and the charging component, and keeping the charging component charging the first battery.

[0020] In one embodiment, the control component in the charging system includes a first coulombmeter and a second coulombmeter; the obtaining the powers of the first battery and the second battery includes:

[0021] Receiving the cell voltage and the charging current of the first battery obtained by the first coulombmeter;

[0022] Receiving the cell voltage and the charging current of the second battery obtained by the second coulombmeter;

[0023] Determining the power of the first battery according to the cell voltage and the charging current of the first cell, and determining the power of the second battery according to the cell voltage and the charging current of the second cell.

[0024] In one embodiment, the controlling the switching element to disconnect the connection between the second battery and the charging component specifically includes:

[0025] Outputting a low-level disconnection signal to the switching element, and the duration of the falling edge of the disconnection signal is greater than or equal to a first set duration; or

[0026] Outputting a high-level disconnection signal to the switching element, and the duration of the rising edge of the disconnection signal is greater than or equal to the first set duration.

[0027] In one embodiment, the responding to the power of the second battery increasing to the first preset threshold and keeping charging the first battery includes:

[0028] In response to the power of the second battery increasing to the first preset threshold, obtain the charging current of the first battery;

[0029] During the time period of the falling edge or the rising edge, keep the charging component charging the first battery with the charging current.

[0030] In one embodiment, the controlling the switch to conduct the connection between the second battery and the charging component includes:

[0031] Output a high-level connection signal to the switch, and the duration of the rising edge of the connection signal is greater than or equal to a second set duration; or

[0032] Output a low-level connection signal to the switch, and the duration of the falling edge of the connection signal is greater than or equal to the second set duration.

[0033] In one embodiment, the responding to the power of the first battery increasing to a second preset threshold and keeping charging the first battery includes:

[0034] In response to the power of the first battery increasing to the second preset threshold, obtain the charging current of the first battery;

[0035] During the time period of the rising edge or the falling edge, keep the charger charging the first battery with the charging current.

[0036] In one embodiment, the terminal device further includes a prompting component for outputting power prompting information. Before the power of the second battery increases to the second preset threshold, the method further includes:

[0037] In response to the power of the second battery being greater than or equal to the first preset threshold, determine the total battery power according to the power of the first battery and the first preset threshold;

[0038] Generate a power prompting instruction according to the total battery power to control the prompting component to output power prompting information.

[0039] In a third aspect, an embodiment of the present disclosure provides a charging device, and the device is applied to the charging system described in the first aspect; the device includes:

[0040] An obtaining module, configured to obtain the power of the first battery and the second battery during the charging process;

[0041] A first control module, configured to, in response to the power of the second battery increasing to the first preset threshold, control the switch to disconnect the connection between the second battery and the charging component, and keep the charging component charging the first battery; and

[0042] A second control module, configured to, in response to the power of the first battery increasing to a second preset threshold, control the switch to turn on the connection between the second battery and the charging component, and keep the charging component charging the first battery.

[0043] In one embodiment, the obtaining module includes:

[0044] A first receiving unit, configured to receive the cell voltage and charging current of the first battery obtained by the first coulometer;

[0045] A second receiving unit, configured to receive the cell voltage and charging current of the second battery obtained by the second coulometer;

[0046] A determining unit, configured to determine the power of the first battery according to the cell voltage and charging current of the first cell, and determine the power of the second battery according to the cell voltage and charging current of the second cell.

[0047] In one embodiment, the first control module includes a first control unit, and the first control unit is configured to:

[0048] Output a low-level disconnection signal to the switch, and the duration of the falling edge of the disconnection signal is greater than or equal to a first set duration; or

[0049] Output a high-level disconnection signal to the switch, and the duration of the rising edge of the disconnection signal is greater than or equal to the first set duration.

[0050] In one embodiment, the first control module further includes:

[0051] A first obtaining unit, configured to, in response to the power of the second battery increasing to the first preset threshold, obtain the charging current of the first battery; and

[0052] A first charging unit, configured to, within the period of the falling edge or the rising edge, keep the charging component charging the first battery with the charging current.

[0053] In one embodiment, the second control module includes: a second control unit, and the second control unit is configured to:

[0054] Output a high-level connection signal to the switch, and the duration of the rising edge of the connection signal is greater than or equal to a second set duration; or

[0055] Output a low-level connection signal to the switch, and the duration of the falling edge of the connection signal is greater than or equal to the second set duration.

[0056] In one embodiment, the second control module further includes:

[0057] A second acquisition unit, configured to acquire a charging current of the first battery in response to the power of the first battery increasing to a second preset threshold; and

[0058] A second charging unit, configured to keep the charger charging the first battery with the charging current within a time period of the rising edge or the falling edge.

[0059] In one embodiment, the terminal device further includes a prompting component for outputting power prompting information, and the device further includes:

[0060] A determination module, configured to determine a total battery power according to the power of the second battery and the first preset threshold in response to the power of the first battery being greater than or equal to a first preset threshold before the power of the second battery increases to the second preset threshold; and

[0061] An instruction generation module, configured to generate a power prompting instruction according to the total battery power to control the prompting component to output power prompting information.

[0062] In a fourth aspect, an embodiment of the present disclosure provides a terminal device, where the terminal device includes:

[0063] A charging system as provided in the first aspect;

[0064] A memory storing executable instructions that can be executed by the processor; and

[0065] A processor configured to execute the executable instructions in the memory to implement the method according to any one of the above.

[0066] In a fifth aspect, an embodiment of the present disclosure provides a readable storage medium, on which executable instructions are stored, and when the executable instructions are executed by a processor, the steps of the charging method provided in the second aspect are implemented.

[0067] The charging system, method, device, and terminal device provided by the present disclosure at least have the following beneficial effects:

[0068] In the case of the same total battery capacity, the volume of each battery is reduced by the first battery and the second battery. Moreover, the volume of the second battery is smaller than that of the first battery, so that the second battery can be installed in a relatively narrow space within the terminal device, such as a corner space. In this way, on the premise of meeting the battery capacity requirement of the terminal device, the installation difficulty of the charging module is further reduced. And, through the control component and the switch component, the charging of the second battery with a small capacity can be paused during the charging process. Accordingly, the situation of overcharging the second battery is effectively avoided, ensuring the safety of the charging system. Description of the Drawings

[0069] The accompanying drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0070] Figure 1 is a schematic structural diagram of a charging system shown according to an exemplary embodiment;

[0071] Figure 2 is a schematic structural diagram of a first battery in a charging system shown according to an exemplary embodiment;

[0072] Figure 3 is a schematic structural diagram of a second battery in a charging system shown according to an exemplary embodiment;

[0073] Figure 4 and Figure 5 are flowcharts of charging methods shown according to different exemplary embodiments;

[0074] Figure 6 is a comparison diagram of the relationship between a switching element drive signal and a battery charging current shown according to an exemplary embodiment;

[0075] Figures 7 to 9 are flowcharts of charging methods shown according to different other exemplary embodiments;

[0076] Figures 10 to 14 is a block diagram of a charging device shown according to different exemplary embodiments;

[0077] Figure 15 is a block diagram of a terminal device shown according to an exemplary embodiment. Detailed Description of the Embodiments

[0078] Exemplary embodiments will be described in detail here, and examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0079] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. Unless otherwise defined, the technical terms or scientific terms used in this disclosure shall have the ordinary meanings as understood by those of ordinary skill in the art to which this disclosure pertains. The use of the words "a" or "an" and the like in the specification and claims of this disclosure does not denote a limitation of quantity, but rather indicates the presence of at least one. Unless otherwise indicated, the use of words such as "comprising" or "including" and the like is intended to cover the elements or items appearing before the word "comprising" or "including" and their equivalents that appear after the word "comprising" or "including", and does not exclude other elements or items. The use of words such as "connected" or "coupled" and the like is not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms of "a", "the", and "said" used in the specification and claims of this disclosure are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to any and all possible combinations of one or more of the associated listed items.

[0080] Figure 1 is a schematic diagram of a charging system shown according to an exemplary embodiment. As Figure 1 shown, the charging system provided by the embodiments of this disclosure includes: a first battery 100, a second battery 200, a charging component 300, and a control component 400.

[0081] The first battery 100 and the second battery 200 are arranged in parallel. The total capacity of the charging system is the sum of the capacities of the first battery 100 and the second battery 200. And, the capacity of the second battery 200 is less than the capacity of the first battery 100. At this time, the volume of the second battery 200 is less than the volume of the first battery 100.

[0082] In the case where the total battery capacity is the same, compared with the related art that uses a single battery, the embodiments of this disclosure reduce the volume of each battery through the first battery 100 and the second battery 200. And, the volume of the first battery 100 is greater than the volume of the second battery 200, so that the second battery 200 can be installed in a relatively narrow space within the terminal device, such as a corner space. In this way, on the premise of meeting the battery capacity requirements of the terminal device, the installation difficulty of the charging module is further reduced.

[0083] For two batteries with different capacities and connected in parallel, their power consumption speeds are similar when they are in a charged state. Therefore, the amount of power that needs to be replenished for the two batteries during charging is different. In such a case, the battery with a smaller capacity will be fully charged first. At this time, if not controlled, it will cause the battery with a smaller capacity to be in an overcharged state during the charging process of the battery with a larger capacity. Accordingly, it accelerates the aging of the battery with a smaller capacity and may even cause the battery to bulge, posing a safety hazard.

[0084] Based on the above situation, in the embodiment of the present disclosure, the charging component 300 is connected to the first battery 100. Among them, the charging component 300 is connected to the positive and negative electrodes of the battery core of the first battery 100, and is used to convert the current output by the external power supply into a current suitable for the first battery 100 to charge the first battery 100.

[0085] The second battery 200 further includes a switch 220 connected to the battery core 210. The charging component 300 is connected to the second battery 200 through the switch 220. Among them, the charging component 300 is directly connected to the negative electrode of the battery core of the second battery 200. The switch 220 is connected to the positive electrode of the second battery 200, and the charging component 300 is connected to the positive electrode of the battery core of the second battery 200 through the switch 220. When the switch 220 is turned on, the charging component 300 converts the current output by the external power supply into a current suitable for the second battery 200 to charge the second battery 200.

[0086] In addition, optionally, the charging component 300 includes at least one charge pump chip. When the charging component 300 includes multiple charge pump chips, the multiple charge pump chips are connected in parallel to reduce the current on each charge pump chip and reduce charging heat.

[0087] The control component 400 is connected to the battery cores of the first battery 100 and the second battery 200, and is used to detect the power of the first battery 100 and the second battery 200 during the charging process, and control the on / off of the switch 220 according to the detected power of the first battery 100 and the second battery 200.

[0088] In this way, when the control component 400 detects that the power of the second battery 200 is greater than the set threshold (for example, when the second battery 200 is fully charged), it can control the switch 220 to disconnect, that is, disconnect the connection between the charging component 300 and the second battery 200. Accordingly, it effectively avoids the overcharging of the second battery 200 with a smaller capacity and ensures the safety of the charging system.

[0089] Figure 2 is a schematic structural diagram of the first battery shown according to an exemplary embodiment, Figure 3 is a schematic structural diagram of the second battery shown according to an exemplary embodiment.

[0090] In one embodiment, in combination with Figure 2 and Figure 3 , the control component 400 (not shown in the figure) includes: a first coulombmeter 410, a second coulombmeter 420, and a processor 430.

[0091] Among them, the first coulombmeter 410 is disposed in the first battery 100 and directly obtains the cell voltage and charging current of the first battery 100. The second coulombmeter 420 is disposed in the second battery 200 and directly obtains the cell voltage and charging current of the second battery 200. In this way, the impedance of the connection lines between the first coulombmeter 410 and the second coulombmeter 420 and the cells is small, reducing the influence of the connection lines or other components and improving the detection accuracy of the cell voltage and charging current.

[0092] The processor 430 is connected to the first coulombmeter 410 and the second coulombmeter 420, and is configured to determine the power of the first battery 100 and the second battery 200 according to the cell voltage and charging current, and control the on / off of the switch 220 according to the power.

[0093] The following will be described in conjunction with the structures of the first battery 100 and the second battery 200.

[0094] As Figure 2 shown, the first coulombmeter 410 is disposed on the protection board of the first battery 100. The first coulombmeter 410 includes a positive connection port P+ and a negative connection port P-. In the first battery 100, the positive connection port P+ is connected to the positive electrode of the cell 110, and the negative connection port P- is connected to the negative electrode of the cell 110. In this way, the first coulombmeter 410 directly obtains the cell voltage of the first battery 100 and the charging current received by the cell 110.

[0095] The first coulombmeter 410 further includes a data output port 411. The data output port 411 is connected to the processor 430 and is configured to send the obtained cell voltage and charging current of the first battery 100 to the processor 430. Further, the processor 430 obtains the power corresponding to the current cell voltage and charging current according to a pre-constructed model based on the cell voltage and charging current of the first battery 100. Accordingly, the real-time monitoring of the power of the first battery 100 is realized through the control component 400.

[0096] Moreover, the first battery 100 further includes a positive charging port B+ connected to the positive electrode of the cell 110 and a negative charging port B- connected to the negative electrode of the cell 110. The positive charging port B+ and the negative charging port B- are also connected to the charging component 300 to receive the current output by the charging component 300.

[0097] In addition, the positive charging port B+ of the first battery is connected to the positive electrode of the battery cell through a switching device. Herein, the switching device can be a Metal Oxide Semiconductor (MOS) transistor. The processor 430 is connected to the switching device and is used to control the on / off of the switching device. Wherein, the processor 430 controls the switching device to disconnect the connection between the positive electrode of the battery cell and the positive charging port B+ under set conditions (such as receiving a fault signal triggered by a circuit fault), so as to achieve the function of circuit protection.

[0098] As Figure 3 shown, the second coulombmeter 420 is disposed on the protection board of the second battery 200. The second coulombmeter 420 includes a positive electrode connection port P+ and a negative electrode connection port P-. In the second battery 200, the positive electrode connection port P+ is connected to the positive electrode of the battery cell 210, and the negative electrode connection port P- is connected to the negative electrode of the battery cell 210. In this way, the second coulombmeter 420 directly obtains the cell voltage of the second battery 200 and the charging current received by the battery cell 210.

[0099] The second coulombmeter 420 further includes a data output port 421. The data output port 421 is connected to the processor 430 and is used to send the obtained cell voltage and charging current of the second battery 200 to the processor 430. Further, the processor 430 obtains the power corresponding to the current cell voltage and charging current according to a pre-constructed model based on the cell voltage and charging current of the second battery 200. Accordingly, the real-time monitoring of the power of the second battery 200 is realized through the control component 400.

[0100] Moreover, the second battery 200 further includes a positive charging port B+ connected to the positive electrode of the battery cell 210 through a switching device 220, and a negative charging port B- connected to the negative electrode of the battery cell 210. The positive charging port B+ and the negative charging port B- are also connected to the charging component 300. When the switching device 220 is turned on, the battery cell 210 of the second battery 200 receives the current output by the charging component 300.

[0101] Optionally, the switching device 220 is a MOS transistor, which has a drain, a gate and a source. One of the drain and the source of the switching device 220 is connected to the positive electrode of the battery cell 210, the other of the drain and the source is connected to the positive charging port B+, and the gate is connected to the processor 430. During charging, the processor 430 sends a conduction signal to the gate, so that the source and the drain are connected, and the positive electrode of the battery cell 210 can receive the current input through the positive charging port B+. The processor 430 sends a disconnection signal to the gate, so that the source and the drain are disconnected, and at this time, the positive electrode of the battery cell 210 cannot receive the current input through the positive charging port B+.

[0102] It should be noted that the on-resistance of the switch 220 is less than or equal to 2 milliohms (e.g., 1 milliohm, 1.5 milliohms, 1.8 milliohms, etc.). In this way, the heat generation of the switch 220 is reduced to ensure the safety of battery charging.

[0103] Based on the charging system provided above, an embodiment of the present disclosure provides a charging method. Figure 4 It is a flowchart of a charging method shown according to an exemplary embodiment. As Figure 4 shown, the charging method includes:

[0104] Step 401, obtain the battery levels of the first battery and the second battery during the charging process.

[0105] In step 401, the switch in the second battery is in the on state, so that the second battery receives the current output by the charging component.

[0106] In one embodiment, the control component in the charging system includes a first coulombmeter and a second coulombmeter. Figure 5 It is a partial flowchart of a charging method shown according to an exemplary embodiment. As Figure 5 described, step 401 includes:

[0107] Step 4011, receive the cell voltage and charging current of the first battery obtained by the first coulombmeter.

[0108] Referring to Figure 2 , the first coulombmeter connects the positive electrode charging port B+ of the first battery through the positive electrode connection port P+, and connects the negative electrode connection port P- to the negative electrode charging port B- of the first battery to obtain the cell voltage and charging current of the first battery.

[0109] Step 4012, receive the cell voltage and charging current of the second battery obtained by the second coulombmeter.

[0110] Referring to Figure 3 , the second coulombmeter directly connects the positive electrode of the cell of the second battery through the positive electrode connection port P+, and directly connects the negative electrode connection port P- to the negative electrode of the cell of the second battery to obtain the cell voltage and charging current of the first battery.

[0111] It should be noted that the execution order of step 4011 and step 4012 is not specifically limited. For example, step 4012 is executed first, and then step 4011; or, step 4011 and step 4012 are executed synchronously.

[0112] Step 4013, determine the battery level of the first battery according to the cell voltage and charging current of the first cell, and determine the battery level of the second battery according to the cell voltage and charging current of the second cell.

[0113] Optionally, a correspondence relationship among the charging current, the cell voltage, and the battery power is pre-established according to the performance of the first battery and the second battery. In step 4013, the battery power is obtained according to the charging current and the cell voltage according to the pre-stored correspondence relationship.

[0114] Continue to refer to Figure 4 , and step 402 is executed after step 401.

[0115] Step 402, in response to the battery power of the second battery increasing to the first preset threshold, control the switch to disconnect the connection between the second battery and the charging component, and keep the charging component charging the first battery.

[0116] As the charging process progresses, the battery power of the second battery approaches saturation first. Among them, the first preset threshold can be optionally 95% - 98% of the capacity of the second battery. In other words, when the battery power of the second battery increases to the first preset threshold, the battery power of the second battery is basically full. At this time, by controlling the switch to disconnect the connection between the second battery and the charging component, the charging of the second battery is paused, and the charging component only charges the first battery.

[0117] In this way, the charging of the second battery is paused when the battery power of the second battery is close to saturation. Accordingly, it not only satisfies the continuous charging of the first battery but also avoids overcharging the second battery. And, when the capacity of the second battery reaches the first preset threshold, the large battery is not close to saturation yet. At this time, the charging current of the first battery is large, resulting in heat generation in the circuit where the first battery and the second battery are connected. If the charging is paused after the second battery reaches saturation, it will cause excessive heat generation in the circuit of the second battery, and there are also problems such as bulging and accelerated aging caused by overcharging. Therefore, pausing the charging when the battery power of the second battery reaches the first set threshold close to saturation ensures the safe use of the second battery.

[0118] Among them, based on different types of switches, the method of controlling the switch to disconnect is different. The following will be specifically described in combination with different examples.

[0119] In one example, the switch is an N-channel MOS transistor. The source and drain are conducting when the gate receives a high-level signal, and the source and drain are disconnected when the gate receives a low-level signal.

[0120] At this time, in step 401, the switch is made to be in a conducting state by outputting a high-level signal to the gate of the switch. And, in step 402, controlling the switch to disconnect the connection between the second battery and the charging component specifically includes: outputting a low-level disconnection signal to the switch.

[0121] The duration of the falling edge of the disconnection signal is greater than or equal to a first set duration. Optionally, the first set duration is 2 milliseconds. In this way, the current passing through the switching element gradually decreases under the action of the disconnection signal. And, in order to ensure the response rate of the switching element, the duration of the falling edge is less than or equal to a third set duration. Optionally, the first set duration is 2 milliseconds and the third set duration is 4 milliseconds. At this time, the duration of the falling edge of the disconnection signal is 2 milliseconds, 2.5 milliseconds, 3 milliseconds, etc.

[0122] Figure 6 is a relationship correspondence diagram of the switching element drive signal and the second battery current shown according to an exemplary embodiment. As Figure 6 shown on the right, as the voltage value of the disconnection signal gradually decreases, the current value passing through the switching element slowly decreases.

[0123] Disconnecting the connection between the second battery and the charging component through the switching element is equivalent to reducing the parallel branches in the charging system. At this time, by controlling the duration of the falling edge of the disconnection signal, the charging current of the second battery is slowly reduced. Furthermore, the overall charging system can gradually adapt to the change of the parallel branches in the charging system to avoid the system current fluctuation caused by the sudden change of the charging current of the second battery and ensure the safety of the device. And, in this way, the power information (such as the power value) displayed in the terminal device is also in a stable state, avoiding the jump of the power information and optimizing the user experience.

[0124] In one example, the switching element is a P-channel MOS transistor, and the source and drain are conducting when a low-level signal is received at the gate, and the source and drain are disconnected when a high-level signal is received at the gate.

[0125] At this time, in step 401, the switching element is made conductive by outputting a low-level signal to the gate of the switching element. And, in step 402, controlling the switching element to disconnect the connection between the second battery and the charging component specifically includes: outputting a high-level disconnection signal to the switching element, and the duration of the rising edge of the disconnection signal is greater than or equal to a first set duration.

[0126] Similarly, the duration of the rising edge of the disconnection signal is greater than or equal to a first set duration, so that the current passing through the switching element gradually increases. And, the duration of the rising edge is less than or equal to a third set duration to ensure the response rate of the switching element. Optionally, the first set duration is 2 milliseconds and the third set duration is 4 milliseconds. At this time, the duration of the rising edge of the disconnection signal is 2 milliseconds, 2.5 milliseconds, 3 milliseconds, etc.

[0127] In this way, by controlling the duration of the falling edge of the disconnection signal, the charging current of the second battery is slowly reduced. Furthermore, the overall charging system can gradually adapt to the change of the parallel branches to avoid the system current fluctuation caused by the sudden change of the charging current of the second battery and ensure the safety of the device.

[0128] Figure 7 is a partial flowchart of a charging method shown according to an exemplary embodiment. In one embodiment, as Figure 7 shown, maintaining charging the first battery in step 402 specifically includes:

[0129] Step 4021, in response to the power of the second battery increasing to a first preset threshold, obtain the charging current of the first battery.

[0130] Step 4022, during the time period of the falling edge (the switching element is an N-channel MOS transistor) or the rising edge (the switching element is a P-channel MOS transistor), maintain the charging component to charge the first battery with the charging current.

[0131] Through step 4021 and step 4022, maintain the charging current of the first battery stable during the process of the switching element changing from conducting to closing. In this way, maintain the stability of the charging system current, and the power information displayed by the terminal device is also in a stable state, avoiding the jump of the power information and optimizing the user experience.

[0132] Continue to refer to Figure 4 , and execute step 403 after step 402.

[0133] Step 403, in response to the power of the first battery increasing to a second preset threshold, control the switching element to conduct the connection between the second battery and the charging component, and maintain the charging component to charge the first battery.

[0134] After step 402 pauses charging the second battery, maintain the charging module to charge the first battery. As the charging progresses, the power of the first battery gradually increases. In step 403, when the power of the first battery increases to the second preset threshold, the capacity of the first battery is also close to saturation. Among them, the second preset threshold can be selected as 95% - 98% of the capacity of the first battery. At this time, by controlling the switching element to close, charge the second battery that is close to saturation again. In this way, charge the first battery and the second battery synchronously until their powers are saturated.

[0135] In this way, during the overall charging process, avoid overcharging the second battery with a small capacity, and optimize the use safety of the charging system and the device safety.

[0136] Similar to step 402, in step 403, due to the different types of the switching element, the way to control the switching element to conduct is different. The following is described in combination with specific examples.

[0137] In one example, the switching device is an N-channel MOS transistor. At this time, controlling the switching device to turn on in step 403 specifically includes: outputting a high-level connection signal to the switching device. And, the duration of the rising edge of the turn-on signal is greater than or equal to a second set duration; the duration of the rising edge of the turn-on signal is less than or equal to a fourth set duration.

[0138] In one example, the switching device is a P-channel MOS transistor. At this time, controlling the switching device to turn on in step 403 specifically includes: outputting a low-level connection signal to the switching device. And, the duration of the falling edge of the turn-on signal is greater than or equal to the second set duration; the duration of the falling edge of the turn-on signal is less than or equal to the fourth set duration.

[0139] In the above two examples, optionally, the second set duration is 2 milliseconds, and the fourth set duration is 4 milliseconds. In this way, the switching device is turned on slowly, so that the current passing through the switching device increases slowly, and the switching device is ensured to have a fast response rate.

[0140] Figure 8 is a partial flowchart of a charging method shown according to an exemplary embodiment. In one embodiment, as Figure 8 shown, keeping charging the first battery in step 403 includes:

[0141] Step 4031, in response to the power of the first battery increasing to a second preset threshold, obtaining the charging current of the first battery.

[0142] Step 4032, within the time period of the rising edge or the falling edge, keeping the charger charging the first battery with the charging current.

[0143] Through step 4031 and step 4032, the charging current of the first battery is kept stable during the process of the switching device changing from off to on. In this way, the current of the charging system is maintained stable, and the power information displayed by the terminal device is also in a stable state, avoiding the jump of the power information and optimizing the user experience.

[0144] In addition, in step 403, the power levels of the first battery and the second battery are both close to saturation, and the charging current at this time is very small. Therefore, this charging method further includes: in response to the charging currents of the first battery and the second battery reaching the cut-off current, controlling the external charger to stop charging the first battery and the second battery. In this way, the overall charging process is completed, and the overcharging of the first battery and the second battery is avoided by adjusting the magnitude of the cut-off current, ensuring the safety of the battery.

[0145] In one embodiment, the terminal device further includes a prompting component for outputting a power prompting message. Figure 9 is a flowchart of a charging method shown according to another exemplary embodiment. AsFigure 9 As shown, before the power of the second battery increases to the second preset threshold in step 403, the charging method further includes:

[0146] Step 404, in response to the power of the second battery being greater than or equal to the first preset threshold, determine the total battery power according to the power of the first battery and the first preset threshold.

[0147] During the charging process, when the switch disconnects and then reconnects, determine the total battery power of the charging system according to the power of the first battery and the first preset threshold. Optionally, determine the total battery power by summing the power of the first battery and the first preset threshold; or, determine the total battery power by performing a weighted sum of the power of the first battery and the first preset threshold.

[0148] Step 405, generate a power prompt instruction according to the total battery power to control the prompt component to output a power prompt message.

[0149] Optionally, the prompt component is a display screen, and the output prompt message is a visual prompt message (such as text, numbers or images). Or, the prompt component is a vibration motor, and the output prompt message is a vibration tactile message. Or, the prompt component is a speaker, and the output prompt message is a voice message.

[0150] In summary, the charging method provided by the embodiments of the present disclosure monitors the power of the first battery and the second battery in real time to clarify the charging progress of the first battery and the second battery.

[0151] According to the charging progress of the first battery and the second battery, when the power of the second battery with a smaller capacity increases to the first preset threshold, control the switch to disconnect the connection between the second battery and the charging component, that is, pause charging the second battery. At this time, continue to charge the first battery with a larger capacity.

[0152] When the power of the first battery increases to the second preset threshold, control the switch to conduct the connection between the second battery and the charging component again, that is, recharge the second battery again. At this time, control the charging component to charge the first battery and the second battery simultaneously again. And because the power of both is close to saturation, when charging again, the charging current is close to the cut-off current. When the charging currents of the first battery and the second battery reach the cut-off current, the charging process is completed.

[0153] Adopting the charging method provided by the embodiments of the present disclosure provides a charging solution for the first battery and the second battery with different capacities. And, during the overall charging process, overcharging of the second battery with a smaller capacity is avoided, ensuring the device safety and use safety of the overall charging system. Furthermore, it supports installing the first battery and the second battery with different volumes in the terminal device, and reduces the installation difficulty of the charging system on the premise of achieving a larger battery capacity.

[0154] Based on the charging method provided above, an embodiment of the present disclosure further provides a charging control device. Figure 10 It is a block diagram of a charging device shown according to an exemplary embodiment. As Figure 10 shown, the charging device includes: an acquisition module 1010, a first control module 1020, and a second control module 1030.

[0155] The acquisition module 1010 is configured to acquire the power levels of the first battery and the second battery during the charging process.

[0156] The first control module 1020 is configured to control the switch to disconnect the connection between the second battery and the charging component in response to the power level of the second battery increasing to a first preset threshold, and keep the charging component charging the first battery.

[0157] The second control module 1030 is configured to control the switch to conduct the connection between the second battery and the charging component in response to the power level of the first battery increasing to a second preset threshold, and keep the charging component charging the first battery.

[0158] In one embodiment, Figure 11 It is a block diagram of a charging device shown according to another exemplary embodiment. As Figure 11 shown, the acquisition module 1010 includes: a first receiving unit 1011, a second receiving unit 1012, and a determination unit 1013.

[0159] The first receiving unit 1011 is configured to receive the cell voltage and charging current of the first battery acquired by the first coulombmeter.

[0160] The second receiving unit 1012 is configured to receive the cell voltage and charging current of the second battery acquired by the second coulombmeter.

[0161] The determination unit 1013 is configured to determine the power level of the first battery according to the cell voltage and charging current of the first cell, and determine the power level of the second battery according to the cell voltage and charging current of the second cell.

[0162] In one embodiment, Figure 12 It is a block diagram of a charging device shown according to another exemplary embodiment. As Figure 12 shown, the first control module 1020 includes a first control unit 1021.

[0163] The first control unit 1021 is configured to: output a low-level disconnection signal to the switch, and the duration of the falling edge of the disconnection signal is greater than or equal to a first set duration.

[0164] Alternatively, the first control unit 1021 is configured to: output a high-level disconnection signal to the switch, and the duration of the rising edge of the disconnection signal is greater than or equal to a first set duration.

[0165] As shown Figure 12 in FIG. Figure 12 , the first control module 1020 further includes: a first acquisition unit 1022 and a first charging unit 1023.

[0166] The first acquisition unit 1022 is configured to acquire the charging current of the first battery in response to the power of the second battery increasing to a first preset threshold.

[0167] The first charging unit 1023 is configured to keep the charging component charging the first battery with the charging current during the period of the falling edge or the rising edge.

[0168] In one embodiment, Figure 13 is a block diagram of a charging device shown according to another exemplary embodiment. As shown Figure 13 in FIG. Figure 13 , the second control module 1030 includes a second control unit 1031.

[0169] The second control unit 1031 is configured to: output a high-level connection signal to the switch, and the duration of the rising edge of the connection signal is greater than or equal to a second set duration.

[0170] Alternatively, the second control unit 1031 is configured to: output a low-level connection signal to the switch, and the duration of the falling edge of the connection signal is greater than or equal to a second set duration.

[0171] The second control module 1030 further includes: a second acquisition unit 1032 and a second charging unit 1033.

[0172] The second acquisition unit 1032 is configured to acquire the charging current of the first battery in response to the power of the first battery increasing to a second preset threshold.

[0173] The second charging unit 1033 is configured to keep the charger charging the first battery with the charging current during the period of the rising edge or the falling edge.

[0174] In one embodiment, Figure 14 is a block diagram of a charging device shown according to another exemplary embodiment. The terminal device further includes a prompt component for outputting power prompt information. As shown Figure 14 in FIG. Figure 14 , the device further includes: a determination module 1040 and an instruction generation module 1050.

[0175] The determination module 1040 is configured to determine the total battery power according to the power of the second battery and the first preset threshold in response to the power of the first battery being greater than or equal to the first preset threshold before the power of the second battery increases to the second preset threshold.

[0176] The instruction generation module 1050 is configured to generate a power prompt instruction according to the total battery power to control the prompt component to output power prompt information.

[0177] Based on the charging system, charging method, and device provided above, embodiments of the present disclosure also provide a terminal device. Optionally, the terminal device is a mobile phone, tablet computer, smart wearable device (smart bracelet, smart watch), vehicle-mounted device, medical device, etc.

[0178] The terminal device includes a memory, a processor, and the charging system provided above. Among them, the memory stores executable instructions that can be executed by the processor, and the processor is configured to execute the executable instructions in the memory to implement the steps of the charging method provided above.

[0179] Figure 15 is a block diagram of a terminal device provided according to an exemplary embodiment. As Figure 15 shown, the terminal device 1500 may include one or more of the following components: a processing component 1502, a memory 1504, a power supply component 1506, a multimedia component 1508, a document component 1150, an input / output (I / O) interface 1512, a sensor component 1514, a communication component 1516, and an image acquisition component.

[0180] The processing component 1502 generally controls the overall operation of the terminal device 1500, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 1502 may include one or more processors 1520 to execute instructions. In addition, the processing component 1502 may include one or more modules to facilitate the interaction between the processing component 1502 and other components. For example, the processing component 1502 may include a multimedia module to facilitate the interaction between the multimedia component 1508 and the processing component 1502.

[0181] The memory 1504 is configured to store various types of data to support the operation of the terminal device 1500. Examples of these data include instructions for any application or method operating on the terminal device 1500, contact data, phone book data, messages, pictures, videos, etc. The memory 1504 may 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, a magnetic disk, or an optical disc.

[0182] The power supply component 1506 provides power to various components of the terminal device 1500. The power supply component 1506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the terminal device 1500.

[0183] The multimedia component 1508 includes a display screen that provides an output interface between the terminal device 1500 and the target object. In some embodiments, the display screen may include a liquid crystal display (LCD) and a touch panel (TP). If the display screen includes a touch panel, the display screen can be implemented as a touch screen to receive input signals from the target object. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of the touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operation.

[0184] The audio component 1150 is configured to output and / or input audio signals. For example, the audio component 1150 includes a microphone (MIC) that is configured to receive external audio signals when the terminal device 1500 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 1504 or transmitted via the communication component 1516. In some embodiments, the audio component 1150 further includes a speaker for outputting audio signals.

[0185] The I / O interface 1512 provides an interface between the processing component 1502 and a peripheral interface module, which can be a keyboard, a click wheel, buttons, etc.

[0186] The sensor component 1514 includes one or more sensors for providing status assessments of various aspects of the terminal device 1500. For example, the sensor component 1514 can detect the on / off state of the terminal device 1500, the relative positioning of components, such as the display screen and the keypad of the terminal device 1500. The sensor component 1514 can also detect a change in the position of the terminal device 1500 or a component, the presence or absence of contact between the target object and the terminal device 1500, the orientation or acceleration / deceleration of the terminal device 1500, and the temperature change of the terminal device 1500. For another example, the sensor component 1514 further includes a light sensor that is disposed below the OLED display screen.

[0187] The communication component 1516 is configured to facilitate communication between the terminal device 1500 and other devices in a wired or wireless manner. The terminal device 1500 can access a communication standard-based wireless network, such as WiFi, 4G, or 5G, or a combination thereof. In an exemplary embodiment, the communication component 1516 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 1516 further 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.

[0188] In an exemplary embodiment, the terminal device 1500 can 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.

[0189] In an exemplary embodiment, the embodiments of the present disclosure further provide a readable storage medium storing executable instructions. The above executable instructions can be executed by a processor of the terminal device to implement the steps of the charging method provided above. Among them, the readable storage medium can be a ROM, Random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0190] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the disclosure herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and embodiments are only to be regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

Claims

1. A charging system, characterized in that, Comprising: A first battery; A second battery, having a capacity smaller than that of the first battery, including a battery cell and a switch member connected to the battery cell; A charging assembly, connected to the first battery and connected to the second battery through the switch member, for outputting a charging current to the first battery and the second battery; And A control assembly, connected to the first battery and the second battery, for detecting the power levels of the first battery and the second battery during charging and controlling the on / off of the switch member according to the power levels; wherein, controlling the on / off of the switch member according to the power levels includes: In response to the power level of the second battery increasing to a first preset threshold, controlling the switch member to disconnect the connection between the second battery and the charging assembly, and keeping the charging assembly charging the first battery; In response to the power level of the first battery increasing to a second preset threshold, controlling the switch member to conduct the connection between the second battery and the charging assembly, and keeping the charging assembly charging the first battery, wherein the first battery and the second battery are arranged in parallel, and the total capacity of the charging system is the sum of the capacities of the first battery and the second battery.

2. The charging system according to claim 1, wherein The control assembly includes: A first coulometer, disposed within the first battery and connected to the battery cell of the first battery, for detecting the battery cell voltage and charging current of the first battery; and A processor, connected to the first coulometer, for determining the power level of the first battery according to the battery cell voltage and charging current.

3. The charging system according to claim 2, characterized in that, The control assembly further includes: A second coulometer, disposed within the second battery and connected to the battery cell of the second battery, for detecting the battery cell voltage and charging current of the second battery; The processor is further connected to the second coulometer, for determining the power level of the second battery according to the battery cell voltage and charging current, and controlling the on / off of the switch member according to the power levels of the first battery and the second battery.

4. The charging system according to any one of claims 1 to 3, characterized in that, The on-resistance of the switch member is less than or equal to 2 mΩ.

5. A charging method, characterized in that, The method is applied to the charging system according to any one of claims 1 to 4, and the method includes: Obtaining the power levels of the first battery and the second battery during charging; In response to the power level of the second battery increasing to a first preset threshold, controlling the switch member to disconnect the connection between the second battery and the charging assembly, and keeping the charging assembly charging the first battery; In response to the power level of the first battery increasing to a second preset threshold, controlling the switch member to conduct the connection between the second battery and the charging assembly, and keeping the charging assembly charging the first battery.

6. The charging method according to claim 5, characterized in that The control assembly in the charging system includes a first coulometer and a second coulometer; the obtaining the power levels of the first battery and the second battery includes: Receiving the battery cell voltage and charging current of the first battery obtained by the first coulometer; Receiving the battery cell voltage and charging current of the second battery obtained by the second coulometer; Determining the power level of the first battery according to the battery cell voltage and charging current of the first battery, and determining the power level of the second battery according to the battery cell voltage and charging current of the second battery.

7. The method according to claim 5, characterized in that, The controlling the switch member to disconnect the connection between the second battery and the charging assembly specifically includes: Output a low - level disconnection signal to the switching device, where the duration of the falling edge of the disconnection signal is greater than or equal to a first set duration; or Output a high - level disconnection signal to the switching device, where the duration of the rising edge of the disconnection signal is greater than or equal to the first set duration.

8. The method according to claim 7, wherein The step of maintaining charging the first battery in response to the power of the second battery increasing to a first preset threshold includes: In response to the power of the second battery increasing to the first preset threshold, obtain the charging current of the first battery; During the period of the falling edge or the rising edge, maintain the charging component to charge the first battery with the charging current.

9. The method according to claim 5, wherein The step of controlling the switching device to conduct the connection between the second battery and the charging component includes: Output a high - level connection signal to the switching device, where the duration of the rising edge of the connection signal is greater than or equal to a second set duration; or Output a low - level connection signal to the switching device, where the duration of the falling edge of the connection signal is greater than or equal to the second set duration.

10. The method according to claim 9, wherein The step of maintaining charging the first battery in response to the power of the first battery increasing to a second preset threshold includes: In response to the power of the first battery increasing to the second preset threshold, obtain the charging current of the first battery; During the period of the rising edge or the falling edge, maintain the charging component to charge the first battery with the charging current.

11. The method according to claim 5, wherein The charging system further includes a prompting component for outputting power - prompting information. Before the power of the first battery increases to the second preset threshold, the method further includes: In response to the power of the second battery being greater than or equal to the first preset threshold, determine the total battery power according to the power of the first battery and the first preset threshold; Generate a power - prompting instruction according to the total battery power to control the prompting component to output power - prompting information.

12. A charging control device, characterized in that The device is applied to the charging system according to any one of claims 1 - 4; the device includes: An acquisition module for acquiring the power of the first battery and the second battery during the charging process; A first control module for, in response to the power of the second battery increasing to the first preset threshold, controlling the switching device to disconnect the connection between the second battery and the charging component and maintaining the charging component to charge the first battery; and A second control module for, in response to the power of the first battery increasing to the second preset threshold, controlling the switching device to conduct the connection between the second battery and the charging component and maintaining the charging component to charge the first battery.

13. The device according to claim 12, characterized in that, A first coulomb counter is disposed in the first battery, and a second coulomb counter is disposed in the second battery; The acquisition module includes: A first receiving unit for receiving the cell voltage and charging current of the first battery acquired by the first coulomb counter; A second receiving unit for receiving the cell voltage and charging current of the second battery acquired by the second coulomb counter; A determination unit for determining the power of the first battery according to the cell voltage and charging current of the first battery, and determining the power of the second battery according to the cell voltage and charging current of the second battery.

14. The device according to claim 12, characterized in that, The first control module includes a first control unit, and the first control unit is configured to: output a low-level disconnection signal to the switching element, where the duration of the falling edge of the disconnection signal is greater than or equal to a first set duration; or output a high-level disconnection signal to the switching element, where the duration of the rising edge of the disconnection signal is greater than or equal to the first set duration.

15. The device according to claim 14, characterized in that, The first control module further includes: a first acquisition unit, configured to acquire the charging current of the first battery in response to the power of the second battery increasing to the first preset threshold; and a first charging unit, configured to keep the charging component charging the first battery with the charging current during the period of the falling edge or the rising edge.

16. The device according to claim 12, characterized in that, The second control module includes: a second control unit, and the second control unit is configured to: output a high-level connection signal to the switching element, where the duration of the rising edge of the connection signal is greater than or equal to a second set duration; or output a low-level connection signal to the switching element, where the duration of the falling edge of the connection signal is greater than or equal to the second set duration.

17. The device according to claim 16, characterized in that, The second control module further includes: a second acquisition unit, configured to acquire the charging current of the first battery in response to the power of the first battery increasing to a second preset threshold; and a second charging unit, configured to keep the charging component charging the first battery with the charging current during the period of the rising edge or the falling edge.

18. The device according to claim 12, characterized in that, The charging system further includes a prompting component for outputting power prompting information, and the device further includes: a determination module, configured to determine the total battery power according to the power of the first battery and the first preset threshold in response to the power of the second battery being greater than or equal to the first preset threshold before the power of the first battery increases to the second preset threshold; and an instruction generation module, configured to generate a power prompting instruction according to the total battery power to control the prompting component to output power prompting information.

19. A terminal device, characterized in that, The terminal device includes: a charging system as described in any one of claims 1 to 4; a memory storing processor-executable instructions; and a processor configured to execute the executable instructions in the memory to implement the method as described in any one of claims 5 to 11.

20. A readable storage medium having executable instructions stored thereon, characterized in that, The executable instructions, when executed by the processor, implement the method as described in any one of claims 5 to 11.

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