Charging circuit, charging control method and electronic equipment
By using the existing switching devices on the battery protection board for current control, the problems of extended charging time and increased hardware costs caused by adding switching devices in the prior art are solved, and a faster and more economical charging effect is achieved.
Patent Information
- Application Number
- CN202311399612.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-25
- Publication Date
- 2025-04-25
AI Technical Summary
Among the two batteries connected in parallel, the prior art requires the addition of switching devices to control current, resulting in extended charging time and increased hardware costs.
By using the existing switching devices on the battery protection board to control the charging path current, the use of switching devices is reduced and the impedance of the charging path is reduced.
The effect of reducing charging time and reducing hardware costs is achieved, while ensuring that both batteries can be fully charged at the same time.
Smart Images
Figure CN119891419A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of power supply control technology, and more specifically, to a charging circuit, a charging control method and an electronic device. Background Art
[0002] In the prior art, two batteries connected in parallel are provided in devices such as foldable screen mobile phones. When charging the two batteries in parallel, a switch device needs to be added between the two batteries to control the current, so as to ensure that both batteries can be fully charged when charging stops, thereby ensuring the battery life of the mobile phone.
[0003] Although this design can meet the condition that both batteries are fully charged, the above-mentioned switch devices are usually composed of MOS tubes. When they are introduced into the charging path, the path impedance will be increased, which will affect the current control of the entire charging path and cause the charging time to be extended. At the same time, the additional introduction of switch devices will increase the hardware cost. Summary of the invention
[0004] The present application provides a charging circuit, a charging control method and an electronic device. The following introduces various aspects involved in the embodiments of the present application.
[0005] In a first aspect, a charging circuit is provided, comprising: a first battery and a second battery connected in parallel; a charging chip connected to the first battery to form a first charging path, and connected to the second battery to form a second charging path; the first battery comprises a first battery cell and a first protection board, a first switching device is arranged on the first protection board, and the first switching device is connected between the first charging chip and the first battery cell; a control circuit is connected to a control end of the first switching device, and the control circuit is used to: during the process of charging the first battery and the second battery, control the on and off of the first switching device to control the on and off of the first charging path.
[0006] Optionally, the control circuit is further used to control the first switching device according to the charging current and / or charging voltage of the first battery and the second battery to control the on and off of the first charging path so that the first battery and the second battery can be fully charged at the same time.
[0007] Optionally, the second battery includes a second battery cell and a second protection board, a second switching device is provided on the second protection board, and the second switching device is connected between the charging chip and the second battery cell; the control circuit is connected to the control end of the second switching device, and the control circuit is used to: during the process of charging the first battery and the second battery, control the on and off of the second switching device to control the on and off of the second charging path.
[0008] Optionally, the control circuit is also used to: during the process of charging the first battery and the second battery, control the first switch device to be turned on and the second switch device to be turned off, so as to charge the first battery alone; after the first battery is fully charged, control the first switch device to be turned off and the second switch device to be turned on, so as to charge the second battery alone; or control the first switch device to be turned off and the second switch device to be turned on, so as to charge the second battery alone; after the second battery is fully charged, control the first switch device to be turned on and the second switch device to be turned off, so as to charge the first battery alone.
[0009] Optionally, the capacity of the first battery is smaller than the capacity of the second battery.
[0010] Optionally, the first switching device is a metal oxide semiconductor field effect transistor.
[0011] Optionally, the second switching device is a metal oxide semiconductor field effect transistor.
[0012] In a second aspect, a charging control method is provided, which is applied to a charging circuit, wherein the charging circuit comprises: a first battery and a second battery connected in parallel, wherein the capacity of the first battery is smaller than the capacity of the second battery; a charging chip connected to the first battery to form a first charging path, and connected to the second battery to form a second charging path; the first battery comprises a first battery cell and a first protection board, a first switching device is provided on the first protection board, and the first switching device is connected between the first charging chip and the first battery cell; the method comprises: in the process of charging the first battery and the second battery, controlling the on and off of the first switching device to control the on and off of the first charging path.
[0013] Optionally, the method further includes: controlling the first switching device according to the charging current and / or charging voltage of the first battery and the second battery to control the on and off of the first charging path so that the first battery and the second battery can be fully charged at the same time.
[0014] Optionally, the second battery includes a second battery cell and a second protection board, a second switching device is provided on the second protection board, and the second switching device is connected between the charging chip and the second battery cell; the method also includes: during the process of charging the first battery and the second battery, controlling the on and off of the second switching device to control the on and off of the second charging path.
[0015] Optionally, the method further includes: during charging of the first battery and the second battery, controlling the first switch device to be turned on and the second switch device to be turned off, so as to charge the first battery alone; after the first battery is fully charged, controlling the first switch device to be turned off and the second switch device to be turned on, so as to charge the second battery alone; or controlling the first switch device to be turned off and the second switch device to be turned on, so as to charge the second battery alone; after the second battery is fully charged, controlling the first switch device to be turned on and the second switch device to be turned off, so as to charge the first battery alone.
[0016] Optionally, the capacity of the first battery is smaller than the capacity of the second battery.
[0017] According to the technical solution provided in the embodiment of the present application, the existing switching device on the protection board of the first battery is used to control the current of the charging path of the first battery. Compared with the existing technology of adding additional switching devices to the charging path, the solution of the present application utilizes the existing switching devices on the battery protection board, thereby reducing the use of switching devices and reducing costs; at the same time, since the number of switching devices is reduced, the impedance of the charging path is reduced, which can reduce the time required to fully charge the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of a mobile phone in the related art.
[0019] Figure 2 It is a schematic diagram of another mobile phone in the related art.
[0020] Figure 3 The present invention is a schematic diagram of a charging circuit for charging parallel batteries in the related art.
[0021] Figure 4 It is a schematic diagram of another charging circuit for charging parallel batteries in the related art.
[0022] Figure 5 It is a schematic diagram of a charging circuit provided in an embodiment of the present application.
[0023] Figure 6 is a schematic diagram of a charging circuit provided in another embodiment of the present application.
[0024] Figure 7 It is a schematic flow chart of the charging control method provided in an embodiment of the present application. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.
[0026] It should be noted that, in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0027] With the continuous development and progress of technology, dual batteries are installed in some consumer electronic products to increase the overall capacity of the battery. Figure 1 The folding screen mobile phone 10 shown may have a first battery 11 and a second battery 12 , and the first battery 11 and the second battery 12 are symmetrically arranged on both sides of the bending axis 13 .
[0028] For example, in Figure 2 In the mobile phone 20 shown, since the motherboard and other components occupy part of the space inside the mobile phone 20, in order to maximize the battery capacity, two batteries can be provided in the mobile phone 20 to form a special-shaped battery pack. Figure 2 The mobile phone 20 shown in FIG. 1 includes a first battery 21 and a second battery 22 , wherein the first battery 21 is arranged on the left side of the main board, and the second battery 22 is arranged on the lower side of the main board.
[0029] The first battery and the second battery can be connected in parallel or in series. As a preferred method, the first battery and the second battery can be connected in parallel. The batteries in parallel can be charged at a low voltage. At this time, there is no need to increase the voltage sharply on the charging end side, so as to maintain a high efficiency output. At the same time, when the two batteries in parallel are discharged, the output voltage is twice the single voltage. Therefore, there is no need to set a charge pump in the discharge circuit, which can avoid the additional loss of the components in the charge pump. In addition, the internal resistance of the two batteries in parallel is much smaller than that in the series form, which can reduce the heat loss of the battery during charging.
[0030] The following is a detailed explanation of the method for charging parallel batteries in the related art and the existing problems thereof with reference to the accompanying drawings.
[0031] Figure 3 A schematic diagram of a charging circuit 30 for parallel batteries in the related art is shown. Figure 3 The charging circuit in the embodiment includes a first battery 31A and a second battery 31B connected in parallel with each other.
[0032] The charging circuit 30 also includes a charging chip 32 , a first end of which is connected to a charging interface 33 , and is connected to an external power supply device such as a power adapter through the charging interface 33 to receive an external charging current.
[0033] The output end of the charging chip 32 is connected to the first battery 31A to form a first charging channel, and is connected to the second battery 32B to form a second charging channel, so as to charge the first battery 31A and the second battery 31B through the first charging channel and the second charging channel respectively.
[0034] The input end of the charging chip 32 is connected to the charging interface 33, and the charging interface 33 is used to receive the current provided by an external power supply device such as a power adapter or a power bank to charge the battery. The embodiment of the present application does not specifically limit the type of the charging interface 33. For example, it can be a universal serial bus (USB) interface. The USB interface can be a standard USB interface, a micro USB interface, or a USB Type-C interface; or, the charging interface 33 can also be a wireless charging interface, such as a wireless charging coil based on the Qi protocol.
[0035] When the capacities of the two batteries are the same, due to the current splitting principle of the parallel circuit, the charging currents of the two batteries are nearly the same, and the charging processes of the two batteries are almost the same, that is, the two batteries can be fully charged at the same time.
[0036] However, in some scenarios, such as Figure 1 In the folding screen mobile phone 10 shown, due to the hardware layout inside the housing on both sides of the rotating shaft, the volumes of the first battery and the second battery are different, so that the capacity of the two batteries has a large difference. Figure 2 In the illustrated mobile phone 20, since components such as a main board need to be provided, the sizes of the spaces for accommodating the first battery and the second battery are different, resulting in a difference in the electric capacity of the first battery and the second battery.
[0037] Taking the first battery as an example, the capacity of the first battery is smaller than that of the second battery. Figure 3 If the charging circuit in the battery pack is used to charge the battery, the first battery with a smaller capacity may be fully charged while the second battery with a larger capacity may not be fully charged. On the one hand, there is a possibility that the first battery may discharge to the second battery, which may increase the number of cycles of the first battery to a certain extent. On the other hand, if the first battery is fully charged and current is continuously input to it, it may be overcharged, posing a safety risk.
[0038] Based on this, in some technologies, when the capacity of the first battery is different from the capacity of the second battery, the charging current of the first battery and the second battery can be controlled to ensure that the two batteries can be fully charged at the same time or almost at the same time.
[0039] Figure 4 FIG. 4 is a schematic diagram of a charging circuit 40 for charging two batteries connected in parallel in the related art. Figure 3 The difference between the charging circuit 30 in FIG. 4 is that in the charging circuit 40 , a switch device 41 is further provided between the charging chip 32 and the first battery 31A, and the switch device 41 is used to control the current for charging the first battery 31A.
[0040] For example, in the initial state, the switch device 41 is turned on, and the charging chip 32 charges the first battery and the second battery at the same time. Since the capacity of the first battery is smaller than that of the second battery, the charging speed of the first battery will be higher than that of the second battery. At this time, the switch device 41 can be controlled according to the voltage of the battery. For example, when the voltage difference between the first battery and the second battery is greater than a preset threshold, the switch device 41 can be controlled to be disconnected, and the first power-on channel is disconnected at this time, and the charging chip 32 supplies power to the second battery independently. When the second battery is charged to the same voltage as the first battery, the switch device 41 is controlled to be turned on, and the first battery and the second battery are charged at the same time. Repeat the above process until both batteries are fully charged. In other words, by adding a switch device to control the charging current, it can be ensured that both batteries can be fully charged when charging is stopped, thereby ensuring the battery life of electronic devices such as mobile phones that use the charging circuit.
[0041] However, this technical solution still has some problems: first, the switching device 41 is usually composed of a combination of metal-oxide-semiconductor field-effect transistors (MOSFET), and this type of device has a certain impedance, which affects the current control of the entire charging circuit. The existence of the above impedance will cause the problem of long charging time; and this type of device will also generate heat when current flows through it, thereby causing the temperature of the electronic device to rise. Secondly, compared with conventional charging circuits, the introduction of switching devices will increase hardware costs, thereby increasing the cost of electronic equipment.
[0042] In view of the above problems, embodiments of the present application provide a charging circuit, a charging control method and an electronic device.
[0043] Figure 5 is a schematic diagram of a charging circuit provided in an embodiment of the present application, Figure 5 The charging circuit 50 comprises:
[0044] A first battery 51A and a second battery 51B are connected in parallel. The first battery and the second battery may be, for example, Figure 1 The foldable phone shown in or Figure 2 The battery in the phone shown.
[0045] The charging chip 52 is connected to the first battery 51A to form a first charging path 521, and is connected to the second battery 51B to form a second charging path 522. It should be noted that the connection between the charging chip and the first battery and the second battery refers to the electrical connection between the output end of the charging chip and the first battery and the second battery. The electrical connection mentioned here can be the direct contact connection between the electrodes of the two batteries and the charging chip, or the electrodes of the two batteries can be connected to the charging chip through a conductive medium such as a wire.
[0046] The input end of the charging chip 52 is used to receive input current provided by an external power supply device such as a power adapter or a power bank; the charging chip 52 is usually also provided with a conversion circuit for filtering and / or stepping up and down the input current to obtain an output current, and provide it to the first battery and the second battery through the output end of the charging chip.
[0047] The first battery 51A includes a first battery cell 511A and a first protection plate 512A. The first battery cell 511A is composed of a positive electrode material, a negative electrode material, an electrolyte, a separator and a casing, and is used for storing and releasing electric energy.
[0048] The first battery cell 511A is provided with a tab, and the first protection plate 512A is connected to the first battery cell 511A through the tab, so as to provide protection for the first battery cell 511A.
[0049] Specifically, the first protection board 512A is an integrated circuit board, on which a protection circuit is provided, which is used to prevent the first battery cell 511A from being overcharged and / or over-discharged, and has a short circuit protection function. A battery cell fuel gauge can also be provided on the first protection board 512A, and the battery cell fuel gauge can generally realize functions such as estimating battery cell capacity, detecting battery cell voltage, detecting charging current, detecting discharge current, detecting discharge current, detecting battery cell temperature, and estimating battery cell charge state.
[0050] Continue reading Figure 5, a first switch device 5121A is also provided on the first protection plate 512A, and the first switch device 5121A is connected to the pole ear of the first battery cell 511A, and is usually used to protect the battery; when the first battery 51A is working normally (for example, the voltage and / or current of the first battery cell 511A is within the normal range), the first switch device 5121A is in a conducting state; and when the first battery 51A is in an abnormal working state (for example, when the temperature of the first battery cell 511A rises under the influence of the external environment), the first switch device 5121A can be disconnected, thereby stopping the operation of the first battery cell 511A, thereby avoiding damage to the battery cell caused by continuous operation in this state. In the technical solution of the present application, the two ends of the first switch device 5121A are respectively connected to the charging chip 52 and the first battery cell 511A.
[0051] Continue reading Figure 5 The charging circuit 50 also includes a control circuit 53, which is connected to the control end of the first switch device 5121A. The control circuit 53 is used to control the on-off of the first switch device 5121A during the charging process of the first battery 51A and the second battery 51B, thereby controlling the on-off of the first charging path.
[0052] According to the technical solution provided in the embodiment of the present application, the existing switching device on the protection board of the first battery is used to control the current of the charging path of the first battery. Compared with the existing technology of adding additional switching devices to the charging path, the solution of the present application utilizes the existing switching devices on the battery protection board, thereby reducing the use of switching devices and reducing costs; at the same time, since the number of switching devices is reduced, the impedance of the charging path is reduced, which can reduce the time required to fully charge the battery.
[0053] In some embodiments, the control circuit may control the charging current of the first battery by controlling the first switching device to control the on and off of the first charging path according to the charging current and / or charging voltage of the first battery and the second battery, so that the first battery and the second battery can be fully charged at the same time.
[0054] The technical solution is described in detail below with reference to an example. Taking constant current and constant voltage charging as an example, the first battery and the second battery are first charged with a constant current until their voltage reaches a preset cut-off voltage (e.g., 4.2V), after which the constant voltage charging stage is entered. In the constant voltage stage, the battery can be charged with a constant voltage, at which time the current of the battery continues to decrease until it decreases to a preset minimum cut-off current. The minimum cut-off current is usually related to the rated capacity of the battery. For example, the minimum charging cut-off current of the battery is set to 0.02C, where C represents the rated capacity of the battery. When the capacity of the battery is 3000mAh, the minimum cut-off current of the battery, i.e., the charging cut-off current, is 0.02C, i.e., 0.06A. When the current of the battery reaches the charging cut-off current, it is considered that the battery has reached a full state.
[0055] In the application scenario of the present application, when the capacity of the first battery and the second battery are different, the charging cut-off current of the first battery and the second battery are also different; at the same time, under the same voltage, the time required for the current of the first battery and the second battery to decrease to their corresponding charging cut-off current is also different. Therefore, if the charging current of the first battery is not controlled, the first battery will reach a fully charged state before the second battery.
[0056] According to the technical solution provided by the present application, the on-off state of the first switch device can be adjusted according to the charging current of the first battery and the second battery. For example, when it is detected that the current of the first battery is less than that of the second battery, the first switch device is controlled to be disconnected, thereby stopping the charging of the first battery, and the charging chip charges the second battery alone at this time; when the charging current of the second battery is reduced to a difference between the charging current of the second battery and the current of the first battery greater than the first threshold, the first switch device is controlled to be turned on again, and the first battery and the second battery are charged at the same time. In the process of charging the first battery and the second battery, the above process is repeated until the first battery and the second battery can be fully charged.
[0057] Figure 6 FIG. 2 is a schematic diagram of a charging circuit provided by a further embodiment of the present application. Figure 6 As shown, the second battery 51B includes a second battery cell 511B and a second protection board 512B, wherein a second switch device 5121B is disposed on the second protection board 512B, and the second switch device 5121B is connected between the charging chip 52 and the second battery cell 511B.
[0058] The control circuit 53 is connected to the control end of the second switch device 5121B, and the control circuit is used to control the on-off of the second switch device during the charging process of the first battery and the second battery, so as to control the on-off of the second charging path. That is to say, in this technical solution, the current control of the second battery is realized by using the switch device already on the protection board of the second battery.
[0059] In some embodiments, the control circuit 53 is further used to sequentially control the first switch device and the second switch device so that the first battery and the second battery can be fully charged one after another.
[0060] Specifically, in the process of charging the first battery and the second battery, the control circuit is first used to control the first switch device to be turned on and the second switch device to be turned off; at this time, the charging chip charges the first battery alone. When the first battery is fully charged, the first switch device is controlled to be turned off and the second switch device is turned on to supply power to the second battery alone. The charging order of the first battery and the second battery can also be to charge the second battery first and then the first battery, which is not specifically limited in the embodiment of the present application.
[0061] In some embodiments, the first switch device and the second switch device are controllable power devices, such as metal-oxide-semiconductor field-effect transistors (MOSFETs). Alternatively, the first switch device and the second switch device may also be mechanical physical structures or devices with controllable on-off functions, reaction vessels based on chemical principles, etc. In fact, any type of device that can realize on-off control of a circuit may be used as the first switch device and the second switch device.
[0062] Combination of the above Figure 1-Figure 6 , describes in detail the device embodiment of the present application, and the following is combined with Figure 7 In describing the method embodiments of the present application, it should be understood that the description of the method embodiments corresponds to the description of the device embodiments, and for the sake of brevity, repeated descriptions are appropriately omitted.
[0063] Figure 7 is a schematic flow chart of a charging control method provided in an embodiment of the present application, the method is applied to a charging circuit, the charging circuit comprising: a first battery and a second battery connected in parallel; a charging chip connected to the first battery to form a first charging path, and connected to the second battery to form a second charging path; the first battery comprises a first battery cell and a first protection board, a first switch device is provided on the first protection board, and the first switch device is connected between the first charging chip and the first battery cell. The charging circuit can be, for example, the above Figure 5 or Figure 6 The charging circuit shown.
[0064] Figure 7 The method comprises: step S710, in the process of charging the first battery and the second battery, controlling the first switch device to be turned on and off to control the on and off of the first charging path.
[0065] Optionally, the method further includes: controlling the first switching device according to the charging current and / or charging voltage of the first battery and the second battery to control the on and off of the first charging path so that the first battery and the second battery can be fully charged at the same time.
[0066] Optionally, the second battery includes a second battery cell and a second protection board, a second switching device is provided on the second protection board, and the second switching device is connected between the charging chip and the second battery cell; the method also includes: during the process of charging the first battery and the second battery, controlling the on and off of the second switching device to control the on and off of the second charging path.
[0067] Optionally, the method further includes: during charging of the first battery and the second battery, controlling the first switch device to be turned on and the second switch device to be turned off, so as to charge the first battery alone; after the first battery is fully charged, controlling the first switch device to be turned off and the second switch device to be turned on, so as to charge the second battery alone; or controlling the first switch device to be turned off and the second switch device to be turned on, so as to charge the second battery alone; after the second battery is fully charged, controlling the first switch device to be turned on and the second switch device to be turned off, so as to charge the first battery alone.
[0068] Optionally, the capacity of the first battery is smaller than the capacity of the second battery.
[0069] The present application also provides an electronic device, including the charging circuit in any of the above embodiments. The electronic device in the embodiment of the present application may refer to a terminal, and the "terminal" may include but is not limited to a device configured to receive / send communication signals via a wired line connection (such as via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, a direct cable connection, and / or another data connection / network) and / or via a wireless interface (for example, for a cellular network, a wireless local area network (WLAN), a digital television network such as a handheld digital video broadcasting handheld (DVB-H) network, a satellite network, an amplitude modulation-frequency modulation (AM-FM) broadcast transmitter, and / or another communication terminal). The terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal" and / or a "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that can combine cellular radio telephones with data processing, fax and data communication capabilities; personal digital assistants (PDAs) that can include radio telephones, pagers, Internet / intranet access, web browsers, notepads, calendars and / or global positioning system (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. In addition, the electronic devices used in the embodiments of the present application may also include a power bank that can be charged by an adapter to store energy to provide energy to other electronic devices.
[0070] The embodiment of the present application also provides a machine-readable storage medium for storing a program, and the program enables a computer to execute the method in each embodiment of the present application.
[0071] The embodiment of the present application also provides a computer program product. The computer program product includes a program. The program enables a computer to execute the method in each embodiment of the present application.
[0072] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
[0073] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0074] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
[0075] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).
[0076] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A charging circuit, characterized in that: include: A first battery and a second battery connected in parallel with each other; a charging chip, connected to the first battery to form a first charging path, and connected to the second battery to form a second charging path; The first battery includes a first battery cell and a first protection board, the first protection board is provided with a first switch device, and the first switch device is connected between the first charging chip and the first battery cell; A control circuit is connected to the control end of the first switch device, and the control circuit is used to control the first switch device to be turned on and off during the process of charging the first battery and the second battery, so as to control the on and off of the first charging path.
2. The charging circuit according to claim 1, characterized in that: The control circuit is also used for: The first switch device is controlled according to the charging current and / or charging voltage of the first battery and the second battery to control the on and off of the first charging path, so that the first battery and the second battery can be fully charged at the same time.
3. The charging circuit according to claim 1, characterized in that: The second battery includes a second battery cell and a second protection board, a second switch device is provided on the second protection board, and the second switch device is connected between the charging chip and the second battery cell; The control circuit is connected to the control end of the second switch device, and is used to control the on-off of the second switch device to control the on-off of the second charging path during the process of charging the first battery and the second battery.
4. The charging circuit according to claim 3, characterized in that: The control circuit is also used for: In the process of charging the first battery and the second battery, controlling the first switch device to be turned on and the second switch device to be turned off, so as to charge the first battery alone; After the first battery is fully charged, the first switch device is controlled to be turned off and the second switch device is turned on to charge the second battery alone, or, Controlling the first switch device to be turned off and the second switch device to be turned on to charge the second battery alone; After the second battery is fully charged, the first switch device is controlled to be turned on and the second switch device is turned off, so as to charge the first battery alone.
5. The charging circuit according to any one of claims 1 to 4, characterized in that: The electric capacity of the first battery is smaller than the electric capacity of the second battery.
6. The charging circuit according to any one of claims 1 to 4, characterized in that: The first switch device is a metal oxide semiconductor field effect transistor.
7. The charging circuit according to claim 3 or 4, characterized in that: The second switch device is a metal oxide semiconductor field effect transistor.
8. A charging control method, characterized in that: The method is applied to a charging circuit, and the charging circuit comprises: A first battery and a second battery connected in parallel with each other; a charging chip, connected to the first battery to form a first charging path, and connected to the second battery to form a second charging path; The first battery includes a first battery cell and a first protection board, the first protection board is provided with a first switch device, and the first switch device is connected between the first charging chip and the first battery cell; The method comprises: in the process of charging the first battery and the second battery, controlling the first switch device to be turned on and off, so as to control the on and off of the first charging path.
9. The method according to claim 8, characterized in that The method further includes: controlling the first switch device according to the charging current and / or charging voltage of the first battery and the second battery to control the on and off of the first charging path so that the first battery and the second battery can be fully charged at the same time.
10. The method according to claim 8, characterized in that The second battery includes a second battery cell and a second protection board, a second switch device is provided on the second protection board, and the second switch device is connected between the charging chip and the second battery cell; The method further comprises: In the process of charging the first battery and the second battery, the second switch device is controlled to be on and off so as to control the on and off of the second charging path.
11. The method according to claim 10, characterized in that The method further comprises: In the process of charging the first battery and the second battery, controlling the first switch device to be turned on and the second switch device to be turned off, so as to charge the first battery alone; After the first battery is fully charged, the first switch device is controlled to be turned off and the second switch device is turned on to charge the second battery alone, or, Controlling the first switch device to be turned off and the second switch device to be turned on to charge the second battery alone; After the second battery is fully charged, the first switch device is controlled to be turned on and the second switch device is turned off, so as to charge the first battery alone.
12. The method according to any one of claims 8 to 11, characterized in that The electric capacity of the first battery is smaller than the electric capacity of the second battery.
13. An electronic device, characterized in that: The charging circuit comprises the charging circuit as claimed in any one of claims 1 to 7.