Charging control module, method, intelligent terminal and charging system

Abstract

The application provides a charging control module, a method, a smart terminal and a charging system. The charging control module comprises a charging unit, at least two batteries, at least two switch tubes and a control unit. The charging unit is connected with the positive poles of the at least two batteries, the negative poles of the batteries are respectively connected with the first ends of the switch tubes, the second ends of the at least two switch tubes are connected with each other and grounded, and the control unit is connected with the control ends of the switch tubes. During the charging process of the charging unit for the batteries and / or during the discharging process of the batteries, the control unit controls the voltage difference between the two batteries through the switch tubes. The above technical scheme can control the voltage difference between the at least two batteries, ensure the voltage balance during the charging and discharging, and improve the charging efficiency.

Description

Technical Field

[0001] This application relates to the field of charging technology, specifically to a charging control module, method, smart terminal, and charging system. Background Technology

[0002] As the functions of smart terminals continue to increase, the demand for their battery capacity is also growing. Currently, the common method to increase battery capacity is to connect multiple cells in parallel.

[0003] In the process of conceiving and implementing this application, the inventors discovered at least the following problems: when charging parallel batteries, due to cell capacity or impedance, a voltage difference will be generated between adjacent batteries, resulting in uneven charging between parallel cells and wasting battery capacity.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a charging control module, method, smart terminal, and charging system that can control the voltage difference between at least two batteries, ensuring voltage balance during charging and discharging, and improving charging efficiency.

[0006] This application provides a charging control module, including a charging unit, at least two batteries, at least two switching transistors, and a control unit; the charging unit is connected to the positive terminals of at least two of the batteries, the negative terminals of each battery are respectively connected to the first terminals of each of the switching transistors, the second terminals of at least two of the switching transistors are interconnected and grounded, and the control unit is connected to the control terminals of each of the switching transistors; during the charging process of the charging unit charging each of the batteries, and / or during the discharging process of each of the batteries, the control unit controls the voltage difference between the two batteries through the switching transistors.

[0007] Optionally, during the charging process of each battery, if the voltage difference between two batteries is greater than or equal to a first threshold, the control unit controls the switch connected to the battery with the larger voltage to disconnect, so as to control the voltage difference to be less than the first threshold.

[0008] Optionally, during the discharge process of each battery, if the voltage difference between two batteries is greater than or equal to the second threshold, the control unit controls the switch connecting the battery with the lower voltage to disconnect, so as to control the voltage difference to be less than the second threshold.

[0009] Optionally, it further includes at least one current limiting module, which is connected between the negative terminals of the two batteries, and the control unit is connected to the control terminal of the current limiting module.

[0010] Optionally, during the charging process of each battery, if the voltage difference between two batteries is greater than or equal to the first threshold, the control unit controls the current limiting module between the two batteries to work, connecting the negative terminals of the two batteries so that the battery with the larger voltage charges the battery with the smaller voltage.

[0011] Optionally, during the discharge process of each battery, if the voltage difference between two batteries is greater than or equal to the second threshold, the control unit controls the current limiting module between the two batteries to operate, connecting the negative terminals of the two batteries so that the battery with the larger voltage charges the battery with the smaller voltage.

[0012] Optionally, the switching transistor is a protection MOSFET or a switching MOSFET on a battery protection chip.

[0013] Optionally, the current limiting module includes a current limiting resistor and a control switch. The first end of the current limiting resistor is connected to the negative terminal of one of the two batteries, the second end of the current limiting resistor is connected to the first end of the control switch, the second end of the control switch is connected to the negative terminal of the other of the two batteries, and the control terminal of the control switch is connected to the control unit.

[0014] Optionally, the system further includes a sampling unit connected to each of the batteries and the control unit, for collecting the voltage of the batteries and sending the battery voltage to the control unit.

[0015] Optionally, the control unit is configured to calculate the voltage difference between the two batteries based on the voltage of each battery, and if the voltage difference between the two batteries is greater than or equal to a first threshold, control the switch connected to the battery with the larger voltage to disconnect, so as to control the voltage difference between the two batteries to be less than the first threshold.

[0016] Optionally, the sampling unit is used to collect the negative electrode voltage of the battery with the higher voltage and the voltage of the battery with the lower voltage when the switch connecting the battery with the higher voltage is disconnected.

[0017] Optionally, the sampling unit is used to collect the negative electrode voltage of the battery with the lower voltage and the voltage of the battery with the higher voltage when the switch connecting the battery with the lower voltage is disconnected.

[0018] Optionally, the control unit is further configured to control the switching transistor connecting the two batteries to turn on when the voltage difference between the two batteries is less than the first threshold and / or the second threshold, so that the charging unit charges the two batteries until the batteries reach a fully charged state.

[0019] Optionally, the control unit is further configured to control the switching transistor connected to the two batteries that have reached a fully charged state to disconnect, and the current limiting module to disconnect. After both batteries have reached a fully charged state, the control unit controls the switching transistor connected to the two batteries to turn on.

[0020] This application also provides a charging control method, including the following steps: Step S10, during battery charging, if the voltage difference between the two batteries is greater than or equal to a first threshold, the switch connected to the battery with the higher voltage is disconnected; and / or,

[0021] Step S40: During the battery discharge process, if the voltage difference between the two batteries is greater than or equal to the second threshold, the switch connecting the battery with the lower voltage is disconnected.

[0022] Optionally, the charging control method is applied to a charging control module, which includes a charging unit, at least two batteries, at least two switching transistors, and a control unit.

[0023] Optionally, the charging control method can be applied to any of the above-mentioned charging control modules.

[0024] Optionally, the charging unit is connected to the positive terminal of each battery, the negative terminal of each battery is connected to the first terminal of a switching transistor, and the second terminals of each switching transistor are interconnected and grounded.

[0025] Optionally, the method further includes: step S20, if the voltage difference between the two batteries is greater than or equal to a first threshold and / or a second threshold, connecting the negative terminals of the two batteries so that the battery with the larger voltage charges the battery with the smaller voltage, thereby controlling the voltage difference between the two batteries to be less than the first threshold and / or the second threshold.

[0026] Optionally, the method further includes: step S30, when the voltage difference between the two batteries is less than the first threshold and / or the second threshold, controlling the switch connecting the two batteries to be turned on, so that the charging unit charges the two batteries until the batteries reach a fully charged state.

[0027] This application also provides a smart terminal, including: the charging control module described above; and / or, a memory and a processor, wherein the memory stores a charging control program, and when the charging control program is executed by the processor, it implements the steps of the charging control method described above.

[0028] This application also provides a storage medium storing a computer program that, when executed by a processor, implements the steps of the charging control method described above.

[0029] As described above, the charging control module of this application includes: a charging unit, at least two batteries, at least two switching transistors, and a control unit. The charging unit is connected to the positive terminal of each battery, the negative terminal of each battery is connected to the first terminal of a switching transistor, the second terminals of each switching transistor are interconnected and grounded, and the control unit is connected to the control terminal of each switching transistor. During the charging process of the charging unit for each battery, and / or during the discharging process of each battery, the control unit controls the voltage difference between the two batteries through the switching transistors. The solution of this embodiment can control the voltage difference between at least two batteries, ensuring voltage balance during charging and discharging, and improving charging efficiency. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0031] Figure 1 A schematic diagram of the hardware structure of a smart terminal to implement the various embodiments of this application;

[0032] Figure 2 A communication network system architecture diagram provided for an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the charging control module according to the first embodiment;

[0034] Figure 4 This is a schematic diagram of the charging control module according to the first embodiment;

[0035] Figure 5 This is a schematic diagram of the charging control module according to the first embodiment;

[0036] Figure 6 This is a schematic diagram of the charging control module according to the second embodiment;

[0037] Figure 7 This is a schematic diagram of the charging control module according to the second embodiment;

[0038] Figure 8 This is a flowchart illustrating the charging control method according to the third embodiment;

[0039] Figure 9 This is a flowchart illustrating the charging control method according to the third embodiment;

[0040] Figure 10 This is a flowchart illustrating the charging control method according to the third embodiment;

[0041] Figure 11 This is a flowchart illustrating the charging control method according to the third embodiment;

[0042] Figure 12 This is a flowchart illustrating the charging control method according to the third embodiment;

[0043] Figure 13 This is a schematic diagram of the charging system according to the fourth embodiment.

[0044] The realization of the objectives, functional features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0045] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the 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 this application. Rather, they are merely examples of modules and methods consistent with some aspects of this application as detailed in the appended claims.

[0046] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or module that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or module. Without further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or module that includes that element. Optionally, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which needs to be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0047] It should be understood that although the terms first, second, third, etc., may be used herein to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this document, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if," as used herein, may be interpreted as "when," "when," or "in response to determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising," "including," indicate the presence of the stated feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or," "and / or," "including at least one of the following," etc., as used in this application, may be interpreted as inclusive, or mean any one or any combination thereof. For example, "including at least one of the following: A, B, C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C." Similarly, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C." Exceptions to this definition only occur when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0048] It should be understood that although the steps in the flowcharts of this application's embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0049] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0050] It should be noted that step designations such as S10 and S20 are used in this document for the purpose of more clearly and concisely describing the corresponding content, and do not constitute a substantial limitation on the order. In specific implementation, those skilled in the art may execute S20 first and then S10, etc., but these should all be within the protection scope of this application.

[0051] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0052] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0053] Smart terminals can be implemented in various forms. For example, the smart terminals described in this application may include smart terminals such as mobile phones, tablets, laptops, handheld computers, personal digital assistants (PDAs), portable media players (PMPs), navigation modules, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminals such as digital TVs and desktop computers.

[0054] The following description will use a mobile terminal as an example. Those skilled in the art will understand that, apart from elements specifically designed for mobile purposes, the construction according to the embodiments of this application can also be applied to fixed-type terminals.

[0055] Please see Figure 1 This is a schematic diagram of the hardware structure of a mobile terminal implementing various embodiments of this application. The mobile terminal 100 may include: an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an A / V (Audio / Video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111, etc. Those skilled in the art will understand that... Figure 1 The mobile terminal structure shown does not constitute a limitation on the mobile terminal. The mobile terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0056] The following is combined Figure 1 A detailed introduction to each component of the mobile terminal:

[0057] The radio frequency unit 101 can be used for receiving and transmitting signals during information transmission or calls. Specifically, it receives downlink information from the base station and processes it with the processor 110; additionally, it transmits uplink data to the base station. Typically, the radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, and a duplexer. Furthermore, the radio frequency unit 101 can also communicate wirelessly with networks and other devices. The aforementioned wireless communications may use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplexing-Long Term Evolution), TDD-LTE (Time Division Duplexing-Long Term Evolution), and 5G, etc.

[0058] WiFi is a short-range wireless transmission technology. Mobile terminals, through the WiFi module 102, can help users send and receive emails, browse web pages, and access streaming media, providing users with wireless broadband internet access. Although Figure 1 WiFi module 102 is shown, but it is understood that it is not a necessary component of a mobile terminal and can be omitted as needed without changing the nature of the invention.

[0059] The audio output unit 103 can convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into audio signals and output them as sound when the mobile terminal 100 is in call signal receiving mode, call mode, recording mode, voice recognition mode, broadcast receiving mode, etc. Furthermore, the audio output unit 103 can also provide audio output related to specific functions performed by the mobile terminal 100 (e.g., call signal receiving sound, message receiving sound, etc.). The audio output unit 103 may include a speaker, a buzzer, etc.

[0060] The A / V input unit 104 is used to receive audio or video signals. The A / V input unit 104 may include a graphics processing unit (GPU) 1041 and a microphone 1042. The GPU 1041 processes image data of still images or videos acquired by an image capture module (such as a camera) in video capture mode or image capture mode. The processed image frames can be displayed on the display unit 106. The image frames processed by the GPU 1041 can be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 can receive sound (audio data) in operating modes such as telephone call mode, recording mode, and voice recognition mode, and can process such sound into audio data. The processed audio (voice) data can be converted into a format that can be transmitted to a mobile communication base station via the radio frequency unit 101 in telephone call mode. The microphone 1042 can implement various types of noise cancellation (or suppression) algorithms to eliminate (or suppress) noise or interference generated during the reception and transmission of audio signals.

[0061] The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor. Optionally, the ambient light sensor can adjust the brightness of the display panel 1061 according to the ambient light level, and the proximity sensor can turn off the display panel 1061 and / or backlight when the mobile terminal 100 is moved to the ear. As a type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that recognize the phone's posture (such as landscape / portrait switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc. Other sensors that may be configured in the phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, and infrared sensors, will not be described in detail here.

[0062] The display unit 106 is used to display information input by the user or information provided to the user. The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0063] User input unit 107 can be used to receive input numerical or character information, and generate key signal inputs related to user settings and function control of the mobile terminal. Optionally, user input unit 107 may include touch panel 1071 and other input devices 1072. Touch panel 1071, also known as a touch screen, can collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near touch panel 1071), and drive corresponding connection modules according to a pre-set program. Touch panel 1071 may include a touch detection module and a touch controller. Optionally, touch detection module detects the user's touch position and the signal generated by the touch operation, and transmits the signal to touch controller; touch controller receives touch information from touch detection module, converts it into touch point coordinates, sends it to processor 110, and can receive and execute commands sent by processor 110. In addition, touch panel 1071 can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may also include other input devices 1072. Optionally, other input devices 1072 may include, but are not limited to, one or more of the following: physical keyboard, function keys (such as volume control buttons, power buttons, etc.), trackball, mouse, joystick, etc., without being specifically limited here.

[0064] Optionally, the touch panel 1071 may cover the display panel 1061. When the touch panel 1071 detects a touch operation on or near it, it transmits the information to the processor 110 to determine the type of touch event. Subsequently, the processor 110 provides corresponding visual output on the display panel 1061 based on the type of touch event. Although in Figure 1 In this embodiment, the touch panel 1071 and the display panel 1061 are two independent components to realize the input and output functions of the mobile terminal. However, in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated to realize the input and output functions of the mobile terminal. The specific implementation is not limited here.

[0065] Interface unit 108 serves as an interface through which at least one external module can connect to mobile terminal 100. For example, the external module may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a module with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, and so on. Interface unit 108 may be used to receive input (e.g., data, power, etc.) from the external module and transmit the received input to one or more components within mobile terminal 100, or it may be used to transmit data between mobile terminal 100 and the external module.

[0066] The memory 109 can be used to store software programs and various data. The memory 109 may primarily include a program storage area and a data storage area. Optionally, the program storage area may store the operating system, applications required for at least one function (such as sound playback, image playback, etc.), etc.; the data storage area may store data created based on the use of the mobile phone (such as audio data, phonebook, etc.). Furthermore, the memory 109 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0067] The processor 110 is the control center of the mobile terminal. It connects various parts of the mobile terminal via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 109, and by calling data stored in the memory 109, it performs various functions and processes data of the mobile terminal, thereby providing overall monitoring of the mobile terminal. The processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor and a modem processor. Optionally, the application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 110.

[0068] The mobile terminal 100 may also include a power supply 111 (such as a battery) that supplies power to various components. Preferably, the power supply 111 can be logically connected to the processor 110 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system.

[0069] although Figure 1 As not shown, the mobile terminal 100 may also include a Bluetooth module, etc., which will not be described in detail here.

[0070] To facilitate understanding of the embodiments of this application, the communication network system on which the mobile terminal of this application is based is described below.

[0071] Please see Figure 2 , Figure 2 This application provides a communication network system architecture diagram. The communication network system is an LTE system based on the universal mobile communication technology. The LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and the operator's IP services 204, which are connected in sequence.

[0072] Optionally, UE201 can be the aforementioned terminal 100, which will not be described in detail here.

[0073] E-UTRAN202 includes eNodeB2021 and other eNodeB2022, etc. Optionally, eNodeB2021 can connect to other eNodeB2022 via backhaul (e.g., X2 interface), and eNodeB2021 connects to EPC203, providing access from UE201 to EPC203.

[0074] EPC203 may include MME (Mobility Management Entity) 2031, HSS (Home Subscriber Server) 2032, other MMEs 2033, SGW (Serving Gateway) 2034, PGW (Packet Data Network Gateway) 2035, and PCRF (Policy and Charging Rules Function) 2036, etc. Optionally, MME2031 is the control node that handles signaling between UE201 and EPC203, providing bearer and connection management. HSS2032 is used to provide registers to manage functions such as the Home Location Register (not shown in the figure) and stores user-specific information such as service characteristics and data rates. All user data can be sent through SGW2034. PGW2035 can provide UE 201 IP address allocation and other functions. PCRF2036 is the policy and charging control decision point for service data flow and IP bearer resources. It selects and provides available policy and charging control decisions for the policy and charging enforcement function unit (not shown in the figure).

[0075] IP services 204 may include the Internet, intranet, IMS (IP Multimedia Subsystem), or other IP services.

[0076] Although the above description uses the LTE system as an example, those skilled in the art should know that this application is not only applicable to the LTE system, but also to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, 5G and future new network systems (such as 6G), etc., without limitation.

[0077] Based on the above-described mobile terminal hardware structure and communication network system, various embodiments of this application are proposed.

[0078] First Embodiment

[0079] Reference Figure 3 , Figure 3 The above is a schematic diagram of the charging control module according to the first embodiment. The charging control module of this application embodiment includes:

[0080] The charging unit 101, at least two batteries, at least two switches, and control unit 102;

[0081] The charging unit 101 is connected to the positive terminal of each battery, the negative terminal of each battery is connected to the first terminal of a switching transistor, the second terminals of each switching transistor are connected to each other and grounded, and the control unit 102 is connected to the control terminal of each switching transistor.

[0082] The charging unit 101 is used to charge each battery; the control unit 102 is used to control the switch connected to the battery with the larger voltage to disconnect during the charging process of the charging unit 101 charging each battery, if the voltage difference between the two batteries is greater than or equal to a first threshold, so as to control the voltage difference between the two batteries to be less than the first threshold.

[0083] Optionally, due to the metal traces between each battery and the charging unit, there is an FPC (Flexible Printed Circuit Board) impedance between each battery and the charging unit. Furthermore, the varying distances between each battery and the charging unit result in different FPC impedances between them. Optionally, a larger distance between a battery and the charging unit leads to a larger FPC impedance; conversely, a smaller distance leads to a larger FPC impedance. A larger FPC impedance results in a smaller charging current flowing into the battery, leading to a lower battery voltage; conversely, a smaller FPC impedance results in a larger charging current flowing into the battery, leading to a higher battery voltage.

[0084] Optionally, the grounding wire for each battery is a metallic trace. A longer grounding wire results in a higher FPC impedance, while a shorter grounding wire results in a lower FPC impedance. A higher FPC impedance on the grounding wire leads to a lower battery voltage, and a lower FPC impedance leads to a higher battery voltage. Here, the grounding wire can be the trace between the battery's negative terminal and the grounding port. A longer grounding wire can be understood as a longer trace between the battery's negative terminal and the grounding port, and a shorter grounding wire as a shorter trace between the battery's negative terminal and the grounding port.

[0085] Optionally, after the charging unit continuously charges all batteries for a period of time, the FPC impedance between each battery and the charging unit is different, as is the FPC impedance on the grounding wire of each battery. This results in different charging currents flowing into each battery, leading to differences in the amount of electricity charged by the parallel batteries within the same unit of time. Optionally, since the capacities of different batteries are also different when connected in parallel, this also leads to differences in the amount of electricity charged by the parallel batteries within the same unit of time. When the voltage difference between two batteries is greater than or equal to a first threshold, the switch connecting the battery with the higher voltage is disconnected, causing the charging unit to stop charging the battery with the higher voltage. This reduces the voltage difference between the two batteries, ensuring that the voltage difference between the two batteries is less than the first threshold. This guarantees that at least two batteries can reach a fully charged state, reducing battery capacity waste and improving battery life.

[0086] Optionally, the battery voltage is the voltage difference between the positive and negative terminals of the battery. The voltage difference between two batteries can be the difference between the voltage of the battery with the higher voltage and the voltage of the battery with the lower voltage, or it can be the absolute value of the difference between the voltage of the battery with the lower voltage and the voltage of the battery with the higher voltage. Optionally, the voltage difference here is a positive value. The first threshold and the second threshold can be determined according to the battery performance; they can be specific values ​​or a range, and are not limited here. Optionally, the first threshold can be the same or different.

[0087] Optionally, the charging unit can be a power distribution box, used to convert the externally supplied voltage into the voltage required by the terminal load and the voltage required by the battery, to power the terminal load and charge the battery, and can also be used to convert the voltage supplied by the battery into the voltage required by the terminal load when the battery is powering the terminal load.

[0088] Optionally, the control unit can also, during each battery discharge process, if the voltage difference between the two batteries is greater than or equal to a second threshold, control the switch connected to the battery with the lower voltage to disconnect, so as to control the voltage difference between the two batteries to be less than the second threshold, thereby avoiding the situation where some batteries are charged and some batteries are not charged, and reducing the waste of resources.

[0089] Optionally, such as Figure 3 As shown, the charging control module may include two batteries connected in parallel: a first battery and a second battery, and two switching transistors: a first switching transistor K1 and a second switching transistor K2. The positive terminals of the first battery and the second battery are connected to each other and to the charging unit 101. The negative terminal of the first battery is connected to the first terminal of the first switching transistor K1, and the negative terminal of the second battery is connected to the first terminal of the second switching transistor K2. The second terminals of the first switching transistor K1 and the second switching transistor K2 are connected to each other and grounded. The control unit 102 is connected to the control terminals of the first switching transistor K1 and the second switching transistor K2.

[0090] Optionally, during the charging process of the charging unit 101 for the first battery and the second battery, if the first switch K1 connected to the first battery and the second switch K2 connected to the second battery are closed, and the voltage difference between the first battery and the second battery is greater than or equal to a first threshold, then: Optionally, if the voltage of the first battery is greater than the voltage of the second battery, the control unit 102 controls the first switch K1 connected to the first battery to open, causing the charging unit 101 to stop charging the first battery and only charge the second battery, thereby reducing the voltage difference between the first battery and the second battery to control the voltage difference between the first battery and the second battery to be less than the first threshold. Optionally, if the voltage of the second battery is greater than the voltage of the first battery, the control unit 102 controls the second switch K2 connected to the second battery to open, causing the charging unit 101 to stop charging the second battery and only charge the first battery, thereby reducing the voltage difference between the first battery and the second battery to control the voltage difference between the second battery and the first battery to be less than the first threshold. Optionally, the charging unit 101 starts charging the first battery and the second battery until the first switch K1 connected to the first battery is disconnected or the second switch K2 connected to the second battery is disconnected, and the first switch K1 and the second switch K2 are in a closed state, so that the charging unit 101 can charge the first battery and the second battery.

[0091] Optionally, during the discharge of the first and second batteries, the first switch K1 connected to the first battery and the second switch K2 connected to the second battery are closed if the voltage difference between the first and second batteries is greater than or equal to a second threshold. Optionally, when the voltage of the first battery is greater than the voltage of the second battery, the control unit 102 controls the second switch K2 connected to the second battery to open, causing the second battery to stop discharging and reducing the voltage difference between the first and second batteries to control the voltage difference between the first and second batteries to be less than the second threshold. Optionally, when the voltage of the second battery is greater than the voltage of the first battery, the control unit 102 controls the first switch K1 connected to the first battery to open, causing the first battery to stop discharging and reducing the voltage difference between the first and second batteries to control the voltage difference between the first and second batteries to be less than the second threshold.

[0092] Optionally, such as Figure 4As shown, the charging control module may include N batteries connected in parallel, such as a first battery, a second battery, ..., an Nth battery, where N is an integer greater than 2. The charging control module also includes two or more switching transistors, such as a first switching transistor K1, a second switching transistor K2, ..., an Nth switching transistor Kn. The positive terminals of the first battery, the second battery, ..., the Nth battery are interconnected and connected to the charging unit 101. The negative terminal of the first battery is connected to the first terminal of the first switching transistor K1, the negative terminal of the second battery is connected to the first terminal of the second switching transistor K2, ..., the negative terminal of the Nth battery is connected to the first terminal of the Nth switching transistor Kn. The second terminals of the first switching transistor K1, the second switching transistor K2, ..., the Nth switching transistor Kn are interconnected and grounded. The control unit 101 is connected to the control terminals of the first switching transistor K1, the second switching transistor K2, ..., the Nth switching transistor Kn.

[0093] Optionally, the charging unit 101 charges the first battery, the second battery, ..., the Nth battery. During the charging process, the first switch K1, the second switch K2, ..., the Nth switch Kn are in the closed state. If the voltage between two batteries is greater than or equal to a first threshold, and the voltage difference between the second battery and the third battery is greater than or equal to the first threshold, and the voltage of the second battery is greater than the voltage of the third battery, the control unit 102 controls the second switch K2 connected to the second battery to disconnect, so that the charging unit 101 stops charging the second battery, reducing the voltage difference between the second battery and the third battery, thereby controlling the voltage difference between the second battery and the third battery to be less than the first threshold. Optionally, if the voltage of the third battery is greater than the voltage of the second battery, the control unit 102 controls the third switch K3 connected to the third battery to disconnect, so that the charging unit 101 stops charging the third battery, reducing the voltage difference between the third battery and the second battery, thereby controlling the voltage difference between the third battery and the second battery to be less than the first threshold. Optionally, when the voltages of the first battery and the third battery are greater than or equal to a first threshold, and the voltage of the first battery is greater than the voltage of the third battery, the control unit 102 controls the first switch K1 connected to the first battery to disconnect, so that the charging unit 101 stops charging the first battery, thereby reducing the voltage difference between the first battery and the third battery to control the voltage difference between the first battery and the third battery to be less than the first threshold. When the voltage of the third battery is greater than the voltage of the first battery, the control unit 102 controls the third switch K3 connected to the third battery to disconnect, so that the charging unit 101 stops charging the third battery, thereby reducing the voltage difference between the third battery and the first battery to control the voltage difference between the third battery and the first battery to be less than the first threshold.

[0094] Optionally, during the charging and discharging process of the first battery, the second battery, ..., the Nth battery, the first switch K1, the second switch K2, ..., the Nth switch Kn are in the closed state. If the voltage between two batteries is greater than or equal to a second threshold, and the voltage difference between the second battery and the third battery is greater than or equal to the second threshold, the control unit 102 controls the third switch K3 connected to the third battery to open, so that the third battery stops discharging, reducing the voltage difference between the second battery and the third battery, thereby controlling the voltage difference between the second battery and the third battery to be less than the second threshold. Optionally, if the voltage of the third battery is greater than the voltage of the second battery, the control unit 102 controls the second switch K2 connected to the second battery to open, so that the second battery stops discharging, reducing the voltage difference between the third battery and the second battery, thereby controlling the voltage difference between the third battery and the second battery to be less than the second threshold. Optionally, each switching transistor can be a protection MOSFET on a battery protection chip. Therefore, the protection MOSFET not only has the functions of overcharge / over-discharge / overcurrent protection during charging / overcurrent protection during discharging / short circuit protection, but can also control the voltage difference between batteries, ensuring that at least two batteries can reach a fully charged state, reducing battery capacity waste, and saving layout area. Optionally, the switching transistor can also be other individual MOSFETs.

[0095] Optionally, such as Figure 5 As shown, the charging control module may include a sampling unit 104, which is connected to each battery and the control unit 102 to collect the voltage of each battery. Optionally, the positive and negative terminals of the battery are connected to obtain the voltage difference between the positive and negative terminals, i.e., the battery voltage. After the sampling unit 104 collects the voltage of each battery, it sends the voltage of each battery to the control unit 102. The control unit 102 can then calculate the voltage difference between any two batteries based on the voltage of each battery. When the voltage difference between two batteries is greater than or equal to a first threshold, the control unit 102 controls the switch connected to the battery with the higher voltage to disconnect, causing the charging unit 101 to stop charging the battery with the higher voltage, thereby controlling the voltage difference between the two batteries to be less than the first threshold.

[0096] Optionally, during battery charging, the sampling unit 104 can collect the voltage of the battery with the lower voltage and the negative terminal voltage of the battery with the higher voltage, and send them to the control unit 102. Since the voltage difference between the two batteries is large, the FPC impedance between them is small. Therefore, the FPC impedance value can be ignored, and the positive terminal voltage of the battery with the higher voltage is the same as that of the battery with the lower voltage. Since the negative terminal of the battery with the lower voltage is grounded, its negative terminal voltage is the reference voltage. Thus, the control unit 102 can calculate the positive terminal voltage of the battery with the lower voltage based on its voltage, thereby determining the positive terminal voltage of the battery with the higher voltage, and then calculate the voltage of the battery with the higher voltage based on its positive and negative terminal voltages. Optionally, the control unit 102 can also calculate the voltage between the two batteries based on the voltages of the two batteries, and when the voltage between the two batteries is less than a first threshold and / or a second threshold, control the switch connecting the two batteries to close, thereby enabling the charging unit to continue charging the two batteries until each battery reaches a fully charged state.

[0097] In this embodiment, the charging control module further includes a terminal load 105, which is connected to the charging unit 101. The charging unit 101 can also supply power to the terminal load 105, thus enabling the charging unit 101 to supply power to the terminal load 102 and charge each battery. During the charging process of the charging unit 101 for the terminal load 102 and each battery, if the voltage difference between two batteries is greater than or equal to a first threshold, the control unit 102 can control the switch connected to the battery with the higher voltage to disconnect, thereby controlling the voltage difference between the two batteries to be less than the first threshold. Optionally, the terminal load may be, for example, a CPU, GPU, or screen.

[0098] Optionally, when the switch connected to the battery with the lower voltage is disconnected, the sampling unit 104 may not be able to acquire the voltage of the battery with the lower voltage. Optionally, during battery discharge, the sampling unit 104 can acquire the negative terminal voltage of the battery with the lower voltage and the voltage of the battery with the higher voltage, and send them to the control unit 102.

[0099] Because the voltage difference between the two batteries is large, the FPC impedance between them is small. Therefore, the FPC impedance can be disregarded, resulting in the same positive voltage at the battery with the larger voltage as at the battery with the smaller voltage. Optionally, since the negative terminal of the battery with the larger voltage is grounded, its negative voltage serves as a reference voltage. Thus, the control unit 102 can calculate the positive voltage of the battery with the larger voltage based on its voltage, thereby determining the positive voltage of the battery with the smaller voltage. It can then calculate the voltage of the battery with the smaller voltage based on its positive and negative voltages. Optionally, the control unit 102 can also calculate the voltage between the two batteries based on their voltages and that of the battery with the smaller voltage. When the voltage between the two batteries is less than a second threshold, it controls the switch connecting the two batteries to close, allowing each battery to discharge and, optionally, supply power to the load.

[0100] In some embodiments, during each battery charging or discharging process, the sampling unit can collect the voltage of each battery at a first preset time interval, thereby enabling timely shutdown of the corresponding switch when the voltage between two batteries is greater than or equal to a first threshold or a second threshold. Optionally, during charging, after the switch connecting the battery with the higher voltage is disconnected, the sampling unit can collect the negative electrode voltage of the battery with the higher voltage and the voltage of the battery with the lower voltage at a second preset time interval, thereby calculating the voltage difference between the two batteries and controlling the voltage difference to be less than the first threshold. Optionally, the first preset time interval and the second preset time interval can be the same time interval or different time intervals. During discharging, after the switch connecting the battery with the lower voltage is disconnected, the sampling unit can collect the negative electrode voltage of the battery with the lower voltage and the voltage of the battery with the higher voltage at a second preset time interval to calculate the voltage difference between the two batteries and control the voltage difference to be less than the second threshold.

[0101] Optionally, such as Figure 5 As shown, the charging control module may also include a charging interface 106, which is used to realize a wired connection between the external charging device and the charging unit 101. When the external charging device is a wired charging device, there is a charging connection cable between the external charging device and the terminal device, such as a Universal Serial Bus (USB) data cable, and the charging interface can be a USB interface.

[0102] Optionally, the charging control module may further include multiple positive switching transistors. The first terminal of each positive switching transistor is connected to the positive terminal of a battery, and the second terminal of each positive switching transistor is connected to a charging unit. The control terminal of each positive switching transistor is connected to a control unit. During the charging process of each battery, if the voltage difference between two batteries is greater than or equal to a first threshold, the control unit may control the positive switching transistor connected to the battery with the higher voltage to be disconnected, thereby controlling the voltage difference between the two batteries to be less than the first threshold. It should be noted that the positive switching transistor can be a PMOS or an NMOS. When the positive switching transistor is an NMOS, because the voltage at the positive terminal of the battery is higher, a boost circuit is required to enable the NMOS to conduct.

[0103] Optionally, during charging, the control unit is also configured to control the switching transistor connecting the two batteries to conduct when the voltage difference between the two batteries is less than a first threshold, so that the charging unit can continue to charge the two batteries until each battery reaches a fully charged state. Optionally, during discharging, the control unit can also control the switching transistor connecting the two batteries to disconnect when the voltage difference between the two batteries is less than a second threshold, so that each battery can supply power to the load.

[0104] Optionally, the control unit is also used to control the switch connected to the battery that has reached full charge to disconnect, and at the same time control the current limiting module to disconnect. After both batteries have reached full charge, the control unit controls the switch connected to the two batteries to turn on, thereby achieving the first-to-full disconnect.

[0105] The charging control module provided in this application controls the switching transistor connected to the battery with the larger voltage to disconnect when the voltage difference between the two batteries is greater than or equal to a first threshold. This causes the charging unit to stop charging the battery with the larger voltage, thereby reducing the voltage difference between the two batteries and controlling the voltage difference between the two batteries to be less than the first threshold. This ensures that at least two batteries can reach a fully charged state, reduces battery capacity waste, and improves battery life.

[0106] Second Embodiment

[0107] refer to Figure 6 As shown, Figure 6 This is a structural schematic diagram of the charging control module shown in the first embodiment. The charging control module of this application embodiment includes: a charging unit 101, at least two batteries, at least two switches, at least one current limiting module 103, and a control unit 102.

[0108] The charging unit 101 is connected to the positive terminal of each battery, the negative terminal of each battery is connected to the first terminal of a switching transistor, the second terminals of each switching transistor are connected to each other and grounded, each current limiting module 103 is connected between the negative terminals of two batteries, and the control unit 102 is connected to the control terminal of each switching transistor.

[0109] Optionally, the charging unit 101 is used to charge each battery; the control unit 102 is used to, during the charging process of each battery by the charging unit 101, if the voltage difference between the two batteries is greater than or equal to a first threshold, control the switch connected to the battery with the larger voltage to disconnect, and the current limiting module 103 between the two batteries to work, connecting the negative terminals of the two batteries so that the battery with the larger voltage charges the battery with the smaller voltage, so as to control the voltage difference between the two batteries to be less than the first threshold.

[0110] Optionally, during the charging process of each battery, if the voltage difference between two batteries is greater than or equal to a first threshold, the charging unit controls the switch connected to the battery with the higher voltage to disconnect, causing the charging unit to stop charging the battery with the higher voltage and reducing the voltage difference between the two batteries. Optionally, simultaneously, by controlling the current limiting module to operate and connecting the negative terminals of the two batteries, the battery with the higher voltage can charge the battery with the lower voltage, further reducing the voltage difference between the two batteries. By controlling the voltage difference between the two batteries to be less than the first threshold, at least two batteries can reach a fully charged state, reducing battery capacity waste and improving battery life.

[0111] Optionally, during each battery discharge process, if the voltage difference between the two batteries is greater than or equal to a second threshold, the control unit can control the switch connected to the battery with the lower voltage to disconnect, thus stopping the discharge of the battery with the lower voltage. Optionally, the current limiting module between the two batteries can be controlled to operate simultaneously, connecting the negative terminals of the two batteries so that the battery with the higher voltage charges the battery with the lower voltage, thereby controlling the voltage difference between the two batteries to be less than the second threshold, avoiding a situation where some batteries are charged while others are not during discharge, and reducing resource waste.

[0112] Optionally, such as Figure 6As shown, the charging control module may include two batteries connected in parallel: a first battery and a second battery, two switching transistors: a first switching transistor K1 and a second switching transistor K2, and a current limiting module 103. The positive terminals of the first battery and the second battery are connected to each other and to the charging unit 101. The negative terminal of the first battery is connected to the first terminal of the first switching transistor K1, and the negative terminal of the second battery is connected to the first terminal of the second switching transistor K2. The second terminals of the first switching transistor K1 and the second terminal of the second switching transistor K2 are connected to each other and grounded. The first terminal of the current limiting module 103 is connected to the negative terminal of the first battery, and the second terminal of the current limiting module 103 is connected to the negative terminal of the second battery. The control unit 102 is connected to the control terminals of the first switching transistor K1, the second switching transistor K2, and the control terminal of the current limiting module 103.

[0113] During the charging process of the charging unit 101 for the first and second batteries, if the voltage difference between the first and second batteries is greater than or equal to a first threshold, and the voltage of the first battery is greater than the voltage of the second battery, the control unit 102 controls the first switch K1 connected to the first battery to disconnect, causing the charging unit 101 to stop charging the first battery and only charge the second battery, thereby reducing the voltage difference between the first and second batteries. Optionally, the current limiting module 103 is also controlled to operate simultaneously, connecting the negative terminal of the first battery to the negative terminal of the second battery, thereby enabling the first battery to charge the second battery. Optionally, the voltage difference between the first and second batteries is reduced to control the voltage difference between the first and second batteries to be less than the first threshold. When the voltage of the second battery is greater than the voltage of the first battery, the control unit 102 controls the second switch K2 connected to the second battery to disconnect, so that the charging unit 101 stops charging the second battery and only charges the first battery, thereby reducing the voltage difference between the first battery and the second battery. At the same time, the control unit 102 controls the current limiting module 103 to work, so that the negative terminal of the first battery and the negative terminal of the second battery are connected, thereby enabling the second battery to charge the first battery, further reducing the voltage difference between the second battery and the first battery, so as to control the voltage difference between the second battery and the first battery to be less than the first threshold.

[0114] Optionally, during the discharge process of the first and second batteries, if the voltage difference between the first and second batteries is greater than or equal to a second threshold, and the voltage of the first battery is less than the voltage of the second battery, the control unit 102 controls the first switch K1 connected to the first battery to disconnect, thereby stopping the first battery from discharging and reducing the voltage difference between the first and second batteries. Optionally, the current limiting module 103 is simultaneously controlled to operate, connecting the negative terminal of the first battery to the negative terminal of the second battery, thus enabling the second battery to charge the first battery, further reducing the voltage difference between the first and second batteries, and controlling the voltage difference between the first and second batteries to be less than the second threshold. Optionally, when the voltage of the second battery is less than the voltage of the first battery, the control unit 102 controls the second switch K2 connected to the second battery to disconnect, stopping the second battery from discharging and reducing the voltage difference between the first and second batteries. Simultaneously, the current limiting module 103 is controlled to operate, connecting the negative terminal of the first battery to the negative terminal of the second battery, thus enabling the first battery to charge the second battery, further reducing the voltage difference between the second and first batteries, and controlling the voltage difference between the second and first batteries to be less than the second threshold.

[0115] Optionally, such as Figure 7 As shown, the charging control module may include N batteries connected in parallel, optionally named as first battery, second battery, ..., Nth battery, where N is an integer greater than 2. The charging control module also includes two or more switching transistors, such as first switching transistor K1, second switching transistor K2, ..., Nth switching transistor Kn. The charging control module may also include N(N-1) / 2 current limiting modules 103, that is, one current limiting module 103 is connected between the negative terminals of every two batteries, and each current limiting module 103 is independent of each other. Optionally, Figure 7 Only the current limiting module between the first battery and the second battery, the current limiting module between the first battery and the Nth battery, and the current limiting module between the second battery and the Nth battery are shown.

[0116] Optionally, the charging unit 101 charges the first battery, the second battery, ..., the Nth battery. During the charging process, the first switch K1, the second switch K2, ..., the Nth switch Kn are in the closed state. If the voltage between two batteries is greater than or equal to a first threshold, or if the voltage difference between the second battery and the third battery is greater than or equal to the first threshold, and the voltage of the second battery is greater than the voltage of the third battery, the control unit 102 controls the second switch K2 connected to the second battery to disconnect, so that the charging unit 101 stops charging the second battery, reducing the voltage difference between the second battery and the third battery. At the same time, the control unit 102 controls the current limiting module 103 between the second battery and the third battery to work, so as to connect the negative terminal of the second battery and the negative terminal of the third battery, so that the second battery can charge the third battery, further reducing the voltage difference between the second battery and the third battery, so as to control the voltage difference between the second battery and the third battery to be less than the first threshold. Optionally, when the voltage of the first battery and the third battery is greater than or equal to a first threshold, and the voltage of the first battery is greater than the voltage of the third battery, the control unit 102 controls the first switch K1 connected to the first battery to disconnect, so that the charging unit 101 stops charging the first battery, thereby reducing the voltage difference between the first battery and the third battery. At the same time, the control unit 102 controls the current limiting module 103 between the first battery and the third battery to work, so as to connect the negative terminal of the first battery and the negative terminal of the third battery, so that the first battery can charge the third battery, further reducing the voltage difference between the first battery and the third battery, so as to control the voltage difference between the first battery and the third battery to be less than the first threshold.

[0117] Optionally, during the discharge process, if the voltage between the two batteries is greater than or equal to the second threshold, for example, if the voltage difference between the second and third batteries is greater than or equal to the second threshold and the voltage of the second battery is less than the voltage of the third battery, the control unit 102 controls the second switch K2 connected to the second battery to disconnect, so that the second battery stops discharging, reducing the voltage difference between the second and third batteries. At the same time, the control unit 102 controls the current limiting module 103 between the second and third batteries to work, so as to connect the negative terminal of the second battery and the negative terminal of the third battery, so that the third battery can charge the second battery, further reducing the voltage difference between the second and third batteries, so as to control the voltage difference between the second and third batteries to be less than the second threshold.

[0118] In this example, the current-limiting module may include a current-limiting resistor and a control switch. The first terminal of the current-limiting resistor is connected to the negative terminal of one of the two batteries. The second terminal of the current-limiting resistor is connected to the first terminal of the control switch, and the second terminal of the control switch is connected to the negative terminal of the other battery. The control terminal of the control switch is connected to a control unit. The current-limiting resistor is used to regulate the charging voltage when the battery with the higher voltage charges the battery with the lower voltage. The control switch is used to control whether the negative terminals of the two batteries are connected, i.e., to control whether the current-limiting module operates. The control switch can be, for example, a MOSFET.

[0119] Optionally, the charging control module may further include at least two positive switching transistors. The first end of each positive switching transistor is connected to the positive terminal of a battery, and the second end of each positive switching transistor is connected to a charging unit. The control terminal of each positive switching transistor is connected to a control unit. It may also include at least two positive current limiting modules connected between every two positive switching transistors. During the charging process of each battery, if the voltage difference between two batteries is greater than or equal to a first threshold, the control unit may disconnect both the positive switching transistor and the switching transistor connected to the battery with the higher voltage, causing the charging unit to stop charging the battery with the higher voltage. Simultaneously, the control unit may also control the current limiting module between the negative terminals of the two batteries and the positive current limiting module between the positive terminals of the two batteries to operate, so that the positive terminals of the two batteries are connected, and the negative terminals are also connected, allowing the battery with the higher voltage to charge the battery with the lower voltage, and quickly controlling the voltage difference between the two batteries to be less than the first threshold. Optionally, the positive current limiting module may have the same structure as the current limiting module, for example, including a current limiting resistor and a control transistor.

[0120] The charging control module provided in this application controls the switching transistor connected to the battery with the higher voltage to disconnect when the voltage difference between the two batteries is greater than or equal to a first threshold. This causes the charging unit to stop charging the battery with the higher voltage, reducing the voltage difference between the two batteries. At the same time, it controls the current limiting module between the two batteries to work, allowing the battery with the higher voltage to charge the battery with the lower voltage, further reducing the voltage difference between the two batteries. This quickly controls the voltage difference between the two batteries to be less than the first threshold, ensuring that at least two batteries can reach a fully charged state, reducing battery capacity waste and improving battery life.

[0121] Third Embodiment

[0122] This application embodiment illustrates a charging control method, which can be applied to the charging control module in the above embodiment, and includes the following steps:

[0123] Step S10: During battery charging, if the voltage difference between the two batteries is greater than or equal to the first threshold, the switch connected to the battery with the larger voltage is disconnected.

[0124] Optionally, the charging unit is connected to the positive terminals of at least two batteries, and the negative terminal of each battery is connected to the first terminal of a switching transistor. The second terminals of each switching transistor are interconnected and grounded. The charging unit is used to charge each battery. During the charging process, if the voltage difference between two batteries is greater than or equal to a first threshold, the charging unit controls the switching transistor connected to the battery with the higher voltage to disconnect, causing the charging unit to stop charging the battery with the higher voltage, thereby reducing the voltage difference between the two batteries and controlling the voltage difference between the two batteries to be less than the first threshold.

[0125] Optionally, during the charging process of the charging unit for at least two batteries, the voltage of each battery can be detected, the voltage difference between each pair of batteries can be calculated, and if the voltage difference between the two batteries is greater than or equal to a first threshold, the switch connected to the battery with the higher voltage is disconnected, so as to control the voltage difference between the two batteries to be less than the first threshold.

[0126] Optionally, such as Figure 8 As shown, after executing step S10, step S20 can also be executed. If the voltage difference between the two batteries is greater than or equal to the first threshold, the negative terminals of the two batteries are connected, so that the battery with the larger voltage charges the battery with the smaller voltage, thereby controlling the voltage difference between the two batteries to be less than the first threshold.

[0127] Optionally, such as Figure 8 As shown, after executing step S10, step S20 can also be executed. If the voltage difference between the two batteries is greater than or equal to the second threshold, the negative terminals of the two batteries are connected so that the battery with the larger voltage charges the battery with the smaller voltage, thereby controlling the voltage difference between the two batteries to be less than the second threshold.

[0128] Optionally, the current limiting module between the negative terminals of the two batteries can be controlled to operate so as to connect the negative terminals of the two batteries.

[0129] Optionally, such as Figure 9 As shown, after executing step S10, step S30 can also be executed. When the voltage difference between the two batteries is less than the first threshold and / or the second threshold, the switch connecting the two batteries can be turned on to control the charging unit to charge the battery with the larger voltage between the two batteries until the battery reaches a fully charged state.

[0130] Optionally, such as Figure 10 As shown, step S30 can also be executed after steps S10 and S20.

[0131] Optionally, such as Figure 11As shown, after executing step S10, step S40 can be executed. During each battery discharge process, if the voltage difference between the two batteries is greater than or equal to a second threshold, the switch connected to the battery with the lower voltage is disconnected to control the voltage difference between the two batteries to be less than the second threshold. Then, step S50 can be executed, as follows... Figure 12 As shown, if the voltage difference between the two batteries is less than a first threshold, the switch connecting the two batteries is closed, allowing each battery to continue discharging and optionally supplying power to the load. Optionally, step S40 can be executed after steps S10, S20, and S30.

[0132] Optionally, the entity executing the charging control method in this embodiment may be the control unit in the above embodiments.

[0133] This application also provides a smart terminal, including the charging control module described above, and / or a memory and a processor. The memory stores a charging control program, and when the charging control program is executed by the processor, it implements the steps of the charging control method in any of the above embodiments.

[0134] This application also provides a charging system, such as... Figure 13 As shown, it includes the aforementioned smart terminal 100 and an external power supply device 200. The external power supply device 200 is connected to the smart terminal 100 and is used to supply power to the smart terminal 100.

[0135] The input end of the external power supply device 200 receives mains power, and the output end is connected to the charging interface 106 of the smart terminal 100. After converting the mains power, it is supplied to the charging unit 101 through the charging interface 106.

[0136] This application also provides a storage medium storing a charging control program, which, when executed by a processor, implements the steps of the charging control method in any of the above embodiments.

[0137] In the embodiments of the smart terminal and storage medium provided in this application, all the technical features of any of the above-described charging control method embodiments may be included. The extended and explanatory content of the specification is basically the same as that of the embodiments of the above methods, and will not be repeated here.

[0138] This application also provides a computer program product, which includes computer program code. When the computer program code is run on a computer, it causes the computer to perform the methods described in the various possible implementations above.

[0139] This application also provides a chip, including a memory and a processor. The memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a device with the chip installed performs the methods described in the various possible implementations above.

[0140] It is understood that the above scenarios are merely examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of this application. The technical solutions of this application can also be applied to other scenarios. For example, as those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0141] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0142] The steps in the method of this application embodiment can be adjusted, combined, or deleted according to actual needs.

[0143] The units in the device of this application embodiment can be merged, divided, and deleted according to actual needs.

[0144] In this application, the same or similar terms, concepts, technical solutions and / or application scenario descriptions are generally described in detail only when they appear for the first time. When they appear again, they are generally not repeated for the sake of brevity. When understanding the technical solutions and other contents of this application, the same or similar terms, concepts, technical solutions and / or application scenario descriptions that are not described in detail later can be referred to their previous relevant detailed descriptions.

[0145] In this application, the descriptions of the various embodiments have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0146] The technical features of the present application can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

[0147] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, controlled terminal, or network device, etc.) to execute the methods of each embodiment of this application.

[0148] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable modules. The computer instructions can be stored in a storage medium or transmitted from one storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, storage disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., a solid-state disk (SSD)).

[0149] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A charging control module, characterized in that, It includes a charging unit, at least two batteries, at least two switching transistors, a control unit, and at least one current limiting module; The charging unit is connected to the positive terminal of the battery, the negative terminal of the battery is connected to the first terminal of the switching transistor, the second terminals of the switching transistor are interconnected and grounded, and the control unit is connected to the control terminal of the switching transistor; wherein, the switching transistor is a protection MOS transistor on the battery protection chip; During the charging process of the charging unit, if the voltage difference between the two batteries is greater than or equal to a first threshold, the control unit controls the switch connected to the battery with the higher voltage to disconnect, so that the charging unit stops charging the battery with the higher voltage, thereby controlling the voltage difference to be less than the first threshold; and / or, During the battery discharge process, if the voltage difference between the two batteries is greater than or equal to the second threshold, the control unit controls the switch connected to the battery with the lower voltage to disconnect, so that the battery with the lower voltage stops discharging, thereby controlling the voltage difference to be less than the second threshold. The current limiting module is connected between the negative terminals of the two batteries, and the control unit is connected to the control terminal of the current limiting module. The control unit is also used to control the switch connected to the battery that has reached full charge to disconnect, and at the same time control the current limiting module to disconnect. When both batteries have reached full charge, the control unit controls the switch connected to the two batteries to turn on.

2. The module according to claim 1, characterized in that, Also includes: During the battery charging process, if the voltage difference between the two batteries is greater than or equal to the first threshold, the control unit controls the current limiting module between the two batteries to operate, connecting the negative terminals of the two batteries so that the battery with the higher voltage charges the battery with the lower voltage; and / or, During the battery discharge process, if the voltage difference between the two batteries is greater than or equal to the second threshold, the control unit controls the current limiting module between the two batteries to work, connecting the negative terminals of the two batteries so that the battery with the larger voltage charges the battery with the smaller voltage.

3. The module according to claim 1, characterized in that, It also includes a sampling unit, which is connected to the battery and control unit, for collecting the voltage of the battery and sending the voltage to the control unit; The sampling unit is used to collect the voltages of the two batteries when the switch connecting the battery with the higher voltage is disconnected; and / or, The sampling unit is used to collect the voltage of the two batteries when the switch connecting the battery with the lower voltage is disconnected.

4. The module according to any one of claims 1 to 3, characterized in that, The control unit is also configured to control the switching transistor connecting the two batteries to turn on when the voltage difference between the two batteries is less than the first threshold and / or the second threshold, so that the charging unit charges the two batteries until the batteries reach a fully charged state.

5. A charging control method, characterized in that, The charging control module described in claims 1-4 includes the following steps: Step S10: During battery charging, if the voltage difference between the two batteries is greater than or equal to a first threshold, disconnect the switch connected to the battery with the higher voltage; and / or, In step S40, when the battery is discharging, if the voltage difference between the two batteries is greater than or equal to the second threshold, the switch connected to the battery with the smaller voltage is disconnected.

6. The method according to claim 5, characterized in that, The method further includes: Step S20: If the voltage difference between the two batteries is greater than or equal to the first threshold and / or the second threshold, connect the negative terminals of the two batteries so that the battery with the larger voltage charges the battery with the smaller voltage, thereby controlling the voltage difference between the two batteries to be less than the first threshold and / or the second threshold.

7. The method according to claim 5 or 6, characterized in that, The method further includes: Step S30: When the voltage difference between the two batteries is less than the first threshold and / or the second threshold, control the switch connecting the two batteries to turn on, so that the charging unit charges the two batteries until the batteries reach a fully charged state.

8. A smart terminal, characterized in that, Includes the charging control module as described in any one of claims 1 to 4; And / or, including: a memory, a processor, wherein the memory stores a charging control program, which, when executed by the processor, implements the steps of the charging control method as described in any one of claims 5 to 7.

9. A charging system, characterized in that, It includes the smart terminal as described in claim 8 and an external power supply device, wherein the external power supply device is used to supply power to the smart terminal.

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