Charging control circuit and terminal equipment

Abstract

The utility model provides a charging control circuit and terminal equipment. The charging control circuit comprises an interface, a battery module, a charging module, a main charging control branch and a reverse charging control branch. And the interface is used for connecting external power supply equipment or power receiving equipment. The battery module comprises at least two groups of battery cells. The charging module is electrically connected with the battery module. The main charging control branch is electrically connected with the interface and the charging module; when the interface is connected with a power supply device, the power supply device is communicated with the charging module through the main charging control branch and charges the battery module through the charging module. The reverse charging control branch is electrically connected with the interface and the battery module; and when the interface is connected with the power receiving equipment, the battery module is communicated with the power receiving equipment through the reverse charging control branch and supplies power to the power receiving equipment through the reverse charging control branch. According to the charging control circuit, the reverse charging efficiency and compatibility can be improved, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging control, in particular to a charging control circuit and a terminal device. BACKGROUND

[0002] With the rapid development of modern society, people's demand for terminal devices is increasing, which has very good market prospects and good development momentum. The charging efficiency and compatibility of the charging control circuit in the terminal device are also very critical. The charging efficiency and compatibility of the charging control circuit in the related art are relatively weak, and the cost is also high. CONTENT OF THE INVENTION

[0003] The present application provides a charging control circuit and a terminal device for improving reverse charging efficiency and compatibility and reducing cost.

[0004] The present application provides a charging control circuit, comprising:

[0005] an interface, configured to connect an external power supply device or a powered device;

[0006] a battery module, comprising at least two groups of battery cells;

[0007] a charging module, electrically connected to the battery module;

[0008] a main charging control branch, electrically connected to the interface and the charging module; when the interface is connected to the power supply device, the power supply device is in communication with the charging module through the main charging control branch, and charges the battery module through the charging module; and

[0009] a reverse charging control branch, electrically connected to the interface and the battery module; when the interface is connected to the powered device, the battery module is in communication with the powered device through the reverse charging control branch, and supplies power to the powered device through the reverse charging control branch.

[0010] Preferably, the reverse charging control branch comprises a voltage conversion circuit, which is electrically connected between the battery module and the interface.

[0011] Preferably, the reverse charging control branch further comprises a reverse charging protection circuit, which is electrically connected between the voltage conversion circuit and the interface.

[0012] Preferably, the charging module comprises a main charging chip and a charge pump, both of which are electrically connected to the battery module and the main charging control branch; when the interface is connected to the power supply device, the power supply device is in communication with the main charging chip or the charge pump through the main charging control branch, and charges the battery module through one of the main charging chip or the charge pump.

[0013] Preferably, the main charging control branch comprises a switch tube; the charge pump comprises a detection port and a control port, the detection port is electrically connected with the interface, and the control port is electrically connected with the switch tube; the charge pump detects the current of the interface through the detection port, and controls the on-off of the switch tube through the control port according to the current, so as to control the on-off of the main charging control branch.

[0014] Preferably, the main charging control branch further comprises a main charging protection circuit, which is electrically connected between the switch tube and the main charging chip.

[0015] Preferably, the switch tube comprises an N-type MOS tube.

[0016] Preferably, the rated voltage of each group of the battery cells is at least 4V.

[0017] The application also provides a terminal device comprising the charging control circuit according to any one of the above embodiments.

[0018] Preferably, the terminal device comprises at least one of an electronic device and a charging device.

[0019] The charging control circuit and the terminal device according to the embodiments of the application. The charging control circuit comprises an interface, a battery module, a charging module, a main charging control branch and a reverse charging control branch. The interface is used to connect an external power supply device or a powered device. The battery module comprises at least two groups of battery cells. The charging module is electrically connected with the battery module. The main charging control branch is electrically connected with the interface and the charging module. The reverse charging control branch is electrically connected with the interface and the battery module. When the interface is connected with the power supply device, the power supply device is in communication with the charging module through the main charging control branch, and charges the battery module through the charging module. When the interface is connected with the powered device, the battery module is in communication with the powered device through the reverse charging control branch, and supplies power to the powered device through the reverse charging control branch. In the charging control circuit according to the application, the power supply device charges the battery module, or the battery module supplies power to the powered device, which are arranged in isolation, thereby improving the reverse charging efficiency and compatibility, and reducing the cost.

[0020] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings incorporated into the specification and forming part of the specification, show embodiments consistent with the application, and together with the specification, serve to explain the principles of the application.

[0022] Figure 1 The figure shows the principle block diagram of one embodiment of the charging control circuit according to the application.

[0023] Figure 2 As shown Figure 1 The diagram shows a schematic of one state of the charging control circuit.

[0024] Figure 3 As shown Figure 1 The diagram shows another state of the charging control circuit.

[0025] Figure 4 As shown Figure 1 The circuit diagram of the charging control circuit shown is shown. Detailed Implementation

[0026] The charging control circuit and terminal device provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features of the various embodiments and implementation methods described below can be combined arbitrarily with each other.

[0027] Figure 1 The diagram shown is a schematic block diagram of one embodiment of the charging control circuit 1 of this application. Figure 2 As shown Figure 1 The diagram shows a schematic of one state of the charging control circuit 1. Figure 3 As shown Figure 1 The schematic diagram shows another state of the charging control circuit 1. (As shown...) Figures 1 to 3 As shown, the charging control circuit 1 includes an interface 11, a battery module 12, a charging module 13, a main charging control branch 14, and a reverse charging control branch 15. The interface 11 is used to connect an external power supply device 2 or a powered device 3. In this embodiment, the interface 11 can be a Type-C interface. The power supply device 2 or the powered device 3 can be plugged into the Type-C interface. In some other embodiments, the interface 11 can also be other types of interfaces. The battery module 12 includes at least two sets of battery cells 121. The battery module 12 includes two or more sets of battery cells 21. The rated voltage of each set of battery cells 121 is at least 4V. This configuration ensures that the rated voltage of the battery module 12 is at least 8V. The charging module 13 is electrically connected to the battery module 12. The main charging control branch 14 is electrically connected to the interface 11 and the charging module 13. The main charging control branch 14 is used to control the connection and disconnection between the interface 11 and the charging module 13, thereby controlling the connection and disconnection of the main charging branch. The reverse charging control branch 15 is electrically connected to the interface 11 and the battery module 12. The reverse charging control branch 15 is used to control the connection and disconnection between the battery module 12 and the interface 11, thereby controlling the connection and disconnection of the reverse charging branch.

[0028] exist Figure 2 In the illustrated embodiment, when interface 11 is connected to power supply device 2, power supply device 2 is connected to charging module 13 via main charging control branch 14. For example... Figure 2As shown by the red arrow, the power supply device 2 is connected to the charging module 13 through the main charging control branch 14, forming the main charging branch. The power supply device 2 charges the battery module 12 through the charging module 13. With this configuration, when the interface 11 is connected to the power supply device 2 and the main charging control branch 14 is on, the power supply device 2 can charge the charging module 13, thereby charging the battery module 12.

[0029] exist Figure 3 In the illustrated embodiment, when interface 11 is connected to the powered device 3, battery module 12 is connected to the powered device 3 via reverse charging control branch 15. For example... Figure 3 As shown by the blue arrow, the powered device 3 is connected to the battery module 12 via the reverse charging control branch 15, forming a reverse charging branch. The battery module 12 supplies power to the powered device 3 through the reverse charging control branch 15. With this configuration, when the interface 11 is connected to the powered device 3 and the reverse charging control branch 15 is active, the battery module 12 can supply power to the powered device 3 through the reverse charging control branch 15.

[0030] In the charging control circuit 1 of this application, the main charging control branch 14 and the reverse charging control branch 15 are isolated, so that the power supply device 2 charges the battery module 12, or the battery module 12 supplies power to the power receiving device 3. The isolation between the two avoids the main charging branch and the reverse charging branch from reusing the same port or the same charging module, which not only improves the reverse charging efficiency and compatibility, but also reduces the cost.

[0031] Figure 4 As shown Figure 1 The circuit diagram of the charging control circuit 1 shown is shown. Figure 4 In the illustrated embodiment, to clearly indicate forward charging or reverse charging, the main charging branch is represented by a red arrow, and the reverse charging branch is represented by a blue arrow. Figure 4 As can be seen, the main charging branch and the reverse charging branch of the charging control circuit 1 of this application are isolated. The two are switched according to the different devices connected to the outside of the interface 11. One of the main charging branch and the reverse charging branch is in the working state, and the other is in the non-working state. This setting can improve the reverse charging efficiency and compatibility and reduce costs. Please refer to the following description for details.

[0032] exist Figure 4In the illustrated embodiment, the charging module 13 includes a main charging chip 131 and a charge pump 132. Both the main charging chip 131 and the charge pump 132 are electrically connected to the battery module 12 and the main charging control branch 14. When the interface 11 is connected to the power supply device 2, the power supply device 2 communicates with the main charging chip 131 or the charge pump 132 through the main charging control branch 14, and charges the battery module 12 through one of the main charging chip 131 or the charge pump 132. In this embodiment, both the main charging chip 131 and the charge pump 132 can serve as the charging main body and can charge the battery module 12.

[0033] In some embodiments, when the interface 11 is connected to the power supply device 2, one of the main charging chip 131 and the charge pump 132 charges the battery module 12, which is equivalent to providing a backup charging mechanism. For example, in the case of failure or power failure of the main charging chip 131, the charge pump 132 can replace the main charging chip 131 to continue the charging task. In this way, the reliability of the charging system is improved, and the failure of the charging module 13 to charge the battery module 12 normally is reduced, thereby affecting the normal use of the battery module 12.

[0034] In some embodiments, when the interface 11 is connected to the power supply device 2, the main charging chip 131 can provide relatively stable and accurate charging control, which is suitable for a conventional charging environment. The charge pump 132 can convert the input voltage into a voltage suitable for charging the battery module 12 at a higher efficiency when fast charging is required, thereby achieving fast charging. In this way, the main charging chip 131 or the charge pump 132 can be flexibly selected for charging according to the type of power source connected to the interface 11, the user's requirements for charging speed, and other factors.

[0035] In some embodiments, when the interface 11 is connected to the power supply device 2, the battery module 12 is in a low power state and has a low requirement for charging speed. The main charging chip 131 can slowly charge the battery module 12 at a low power consumption, which helps to prolong the battery life of the battery module 12 and reduce energy loss during charging. When the battery module 12 needs to be quickly charged, the charge pump 132 can utilize its high-efficiency voltage conversion function, although the power consumption may be relatively high during fast charging, but a large amount of power can be supplied to the battery in a short time. This flexible selection of charging methods according to actual needs helps to optimize the power consumption and efficiency of the entire charging system.

[0036] In Figure 4In the illustrated embodiment, the main charging control branch 14 includes a switch tube 141. The switch tube 141 is used to control the on-off between the interface 11 and the main charging chip 131 or the charge pump 132. The switch tube 141 not only functions as a switch, but also functions as an anti-backflow device. In the present embodiment, the switch tube 141 includes an N-type MOS tube. The N-type MOS tube has a low on-resistance, a high current-carrying capacity, and good switching performance, high sensitivity, and high switching efficiency. In addition, the threshold voltage required for conduction is low, which is conducive to reducing power consumption. In other embodiments, the switch tube 141 can also be other types of switches, which are not limited in the present application.

[0037] In Figure 4 In the illustrated embodiment, the charge pump 132 includes a detection port 1321 and a control port 1322. The detection port 1321 is electrically connected to the interface 11, and the control port 1322 is electrically connected to the switch tube 141. In the present embodiment, the main charging chip 131 includes a main charging inlet 1311 and a main charging outlet 1312. The charge pump 132 includes a charge pump charging inlet 1323 and a charge pump charging outlet 1324. The main charging outlet 1312 and the charge pump charging outlet 1324 are both electrically connected to the positive electrode of the battery cell 121 of the battery module 12. The first end of the switch tube 141 can be a gate electrode and is electrically connected to the control port 1322 of the charge pump 132. The second end of the switch tube 141 can be a drain electrode and is electrically connected to the interface 11. The third end of the switch tube 141 can be a source electrode and is electrically connected to the main charging inlet 1311 and the charge pump charging inlet 1323, respectively.

[0038] In Figure 4 In the illustrated embodiment, the charge pump 132 detects the current of the interface 11 through the detection port 1321 and controls the on-off of the switch tube 141 through the control port 1322 according to the current, thereby controlling the on-off of the main charging control branch 14.

[0039] In some embodiments, when the charge pump 132 detects that the interface 11 is connected to the power supply device 2 through the detection port 1321, the charge pump 132 controls the switch tube 141 to be turned on through the control port 1322, thereby controlling the main charging control branch 14 to be turned on. As shown in FIG. 2, when the interface 11 is connected to the power supply device 2, the main charging control branch 14 is turned on, and the main charging chip 131 is connected to the interface 11 through the main charging control branch 14. Figure 4As shown by the red arrow, in some embodiments, the power supply device 2 is connected to the main charging inlet 1311 of the main charging chip 131 via the main charging control branch 14, thereby connecting with the main charging chip 131. In this case, the power supply device 2 charges the battery module 12 through the main charging outlet 1312 of the main charging chip 131. In other embodiments, the power supply device 2 is connected to the charge pump charging inlet 1323 of the charge pump 132 via the main charging control branch 14, thereby connecting with the charge pump 132. In this case, the power supply device 2 charges the battery module 12 through the charge pump charging outlet 1324 of the charge pump 132. This configuration allows for the selection of either the main charging chip 131 or the charge pump 132 to charge the battery module 12, ensuring normal charging of the battery module 12. The specific selection of the main charging chip 131 or the charge pump 132 can be made according to specific needs and is not limited in this application. When one of the main charging branches is connected, the reverse charging branch is disconnected.

[0040] In some other embodiments, when the charge pump 132 detects that the current display interface 11 of the detection port 1321 is connected to the powered device 3, it controls the switch 141 to disconnect, thereby controlling the main charging control branch 14 to disconnect. For example... Figure 4 As indicated by the blue arrow, in some embodiments, the battery module 12 supplies power to the device 3 via the reverse charging control branch 15. This allows the battery module 12 to selectively supply power to the device 3. When the reverse charging branch is connected, any branch in the main charging branch is disconnected. The aforementioned switch 141 serves to prevent backflow.

[0041] With this configuration, the charge pump 132 detects the current of the interface 11 through the detection port 1321, and controls the switching transistor 141 to open and close according to the current through the control port 1322, thereby controlling the opening and closing of the main charging control branch 14. The main charging branch or the reverse charging branch can be selected to meet the charging needs and improve the user experience.

[0042] exist Figure 4 In the illustrated embodiment, the main charging control branch 14 further includes a main charging protection circuit 142, electrically connected between the switching transistor 141 and the main charging chip 131. The main charging protection circuit 142, electrically connected between the switching transistor 141 and the main charging chip 131, can protect the main charging chip 131 from damage and prevent it from being affected by various interference signals, thus improving safety and enhancing the stability and security of the entire system.

[0043] exist Figure 4In the embodiment shown, the reverse charging control branch 15 includes a voltage conversion circuit 151 electrically connected between the battery module 12 and the interface 11. In some embodiments, the voltage conversion circuit 151 can be at least one of a boost circuit, a buck circuit, or a boost-buck circuit. In this embodiment, the voltage conversion circuit 151 can be a boost-buck circuit. When reverse charging is performed, the battery module 12 outputs an 8V voltage, which is converted by the voltage conversion circuit 151 and supplied to the powered device 3 through the interface 11. By providing the voltage conversion circuit 151, it is ensured that the battery module 12 can stably supply power to the powered device 3, and the reverse charging is not powered off, so that the reverse charging can be stably operated.

[0044] In Figure 4 In the embodiment shown, the reverse charging control branch 15 further includes a reverse charging protection circuit 152 electrically connected between the voltage conversion circuit 151 and the interface 11. The reverse charging protection circuit 152 is electrically connected between the voltage conversion circuit 151 and the interface 11, which can protect the powered device 3 from damage and avoid various interference signals, improve safety, and make the stability and safety of the entire system better.

[0045] In the related art, the active charging and reverse charging of the charge pump need to multiplex the same port. Reverse charging is boosted by the charge pump, which can cause a large number of incompatible situations, such as a break in the charging process when charging other peripherals, affecting the actual experience of the user. Multiplexing the same port also requires setting up corresponding freewheeling switches and anti-backflow switches for isolation, which can cause poor reverse charging efficiency and compatibility, increasing costs. Moreover, the battery module in the related art uses a group of cells, and the cells have a 4V voltage, which is relatively low and causes a large power supply current, which can additionally increase the width of the traces on the circuit board and the cost of the area of the circuit board.

[0046] Compared with the related art, the active charging branch and the reverse charging branch of the charge pump 132 in the present application are isolated (such as Figures 1 to 4In this way, the reverse charging efficiency can be improved. The battery module 12 can also be directly input to the voltage conversion circuit 151, and compatibility with other devices can be solved. For example, the charging control circuit 1 of the present application can support at least one of reverse charging of 20W (20V 1A), 33W (11V 3A), 18W (9V 2A), etc. Since the active charging branch and the reverse charging branch of the charge pump 132 are isolated, the charging control circuit 1 of the present application can also reduce the corresponding freewheeling switch and the anti-inrush switch, thereby reducing the cost of the module. In addition, the battery module 12 in the present application adopts the architecture of at least two groups of battery cells 121, and the voltage of the at least two groups of battery cells 121 is at least 8V. Compared with related technologies, the voltage of the battery module 12 is increased and the corresponding power supply current is halved, so that the width of the circuit board trace is halved, the area of the circuit board is reduced, and the cost is reduced.

[0047] The present application also provides a terminal device comprising the charging control circuit 1 shown in the embodiments. Figures 1 to 4 The terminal device comprises the charging control circuit 1 shown in the embodiments. ​ The terminal device comprises the charging control circuit 1 shown in the embodiments.

[0048] In some embodiments, the terminal device comprises at least one of an electronic device and a charging device. In this embodiment, the terminal device can be an electronic device, for example, a mobile phone or a large-capacity tablet. For example, the tablet has a large battery capacity and can be used as a power bank to charge external devices such as consumer electronics with a USB interface. In addition, in other embodiments, the terminal device can also be a charging device, for example, a power bank, which is not limited in the present application.

[0049] It should be understood that the present application is not limited to the precise construction that has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present application is only limited by the appended claims.

Claims

1. A charge control circuit, characterized by comprising: include: An interface is used to connect to external power supply or power receiving equipment; A battery module, comprising at least two sets of battery cells; The charging module is electrically connected to the battery module. The main charging control branch is electrically connected to the interface and the charging module. When the interface is connected to the power supply device, the power supply device is connected to the charging module through the main charging control branch, and charges the battery module through the charging module. and The reverse charging control branch is electrically connected to the interface and the battery module. When the interface is connected to the power receiving device, the battery module is connected to the power receiving device through the reverse charging control branch and supplies power to the power receiving device through the reverse charging control branch.

2. The charge control circuit according to claim 1, characterized by The reverse charging control branch includes a voltage conversion circuit, which is electrically connected between the battery module and the interface.

3. The charge control circuit according to claim 2, characterized by The reverse charging control branch also includes a reverse charging protection circuit, which is electrically connected between the voltage conversion circuit and the interface.

4. The charge control circuit according to claim 1, characterized by The charging module includes a main charging chip and a charge pump. Both the main charging chip and the charge pump are electrically connected to the battery module and the main charging control branch. When the interface is connected to the power supply device, the power supply device is connected to the main charging chip or the charge pump through the main charging control branch, and charges the battery module through one of the main charging chip or the charge pump.

5. The charge control circuit according to claim 4, characterized by The main charging control branch includes a switching transistor; the charge pump includes a detection port and a control port, the detection port is electrically connected to the interface, and the control port is electrically connected to the switching transistor; the charge pump detects the current of the interface through the detection port, and controls the switching transistor to turn on or off according to the current through the control port, thereby controlling the on / off state of the main charging control branch.

6. The charge control circuit according to claim 5, characterized by The main charging control branch also includes a main charging protection circuit, which is electrically connected between the switching transistor and the main charging chip.

7. The charge control circuit according to claim 5, wherein The switching transistor includes an N-type MOSFET.

8. The charge control circuit according to claim 1, characterized by The rated voltage of each group of cells is at least 4V.

9. A terminal device, comprising: include: The charging control circuit as described in any one of claims 1 to 8.

10. The terminal device according to claim 9, characterized by The terminal device includes at least one of electronic devices and charging devices.

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