CN219086824U - Charging control circuit and electronic equipment - Google Patents

Abstract

The embodiment of the application provides a charge control circuit and electronic equipment, electronic equipment includes first battery and second battery, charge control circuit includes: the charging control module, the switch module and the impedance matching part; the switch module and the impedance matching part are connected in parallel between the charging control module and the first battery; the second battery is electrically connected with the output end of the charging control module; the working states of the first battery and the second battery comprise a charging state and a discharging state, the switch module is disconnected under the condition that the first battery and the second battery are both in the charging state, the impedance matching part is electrified to perform impedance matching, and the switch module is conducted under the condition that the first battery and the second battery are both in the discharging state, so that the impedance matching part is bypassed.

Description

Charging control circuit and electronic equipment

Technical Field

The application belongs to the technical field of communication, and particularly relates to a charging control circuit and electronic equipment.

Background

With the extremely pursuit of users for use experience, foldable electronic devices are greatly favored by users because of their advantages of larger display area and smaller storage volume. In order to improve the cruising ability of the electronic device, a battery is usually disposed in both the first body and the second body, and the capacities of the two batteries are often different. Therefore, in the process of charging an electronic device, it is often necessary to charge two batteries of different capacities simultaneously.

In particular applications, in order to achieve parallel high current charging of two batteries of different capacities, impedance matching is typically required on the charging path. In the prior art, two current limiting integrated circuits are generally arranged on a charging path to perform impedance matching, so that the structure cost is high. In addition, in the process of discharging the battery, the impedance of the two current limiting integrated circuits can bring additional electricity consumption, so that the electricity consumption speed is increased, the cruising ability of the electronic equipment is reduced, and the use experience of a user is affected.

Disclosure of Invention

The application aims to provide a charging control circuit and electronic equipment, so as to solve the problems that the existing charging control circuit is complex in structure and affects the cruising ability of the electronic equipment.

In order to solve the technical problems, the application is realized as follows:

in a first aspect, the present application discloses a charge control circuit applied to an electronic device, the electronic device including a first battery and a second battery, the charge control circuit including: the charging control module, the switch module and the impedance matching part;

the switch module and the impedance matching part are connected in parallel between the charging control module and the first battery;

the second battery is electrically connected with the output end of the charging control module;

the working states of the first battery and the second battery comprise a charging state and a discharging state, the switch module is disconnected under the condition that the first battery and the second battery are both in the charging state, the impedance matching part is electrified to perform impedance matching, and the switch module is conducted under the condition that the first battery and the second battery are both in the discharging state, so that the impedance matching part is bypassed.

In a second aspect, the present application also discloses an electronic device, including: a first battery, a second battery, and a charge control circuit according to any one of the above; wherein,,

the charging control circuit is electrically connected with the first battery and the second battery respectively.

In the embodiment of the application, the charging control circuit may be used for controlling charging of the first battery and the second battery of the electronic device. Since the charge control circuit comprises a charge control module, a switch module and an impedance matching part; the switch module and the impedance matching member are connected in parallel between the charge control module and the first battery. And under the condition that the first battery and the second battery are both in the charging state, the switch module is disconnected, and the impedance matching part is electrified to perform impedance matching so as to realize parallel high-current charging of the first battery and the second battery and improve charging efficiency. And under the condition that the first battery and the second battery are both in the discharging state, the switch module is conducted and electrified so that the impedance matching part is bypassed, extra electric quantity consumption caused by the impedance matching part is avoided, and the cruising ability of the electronic equipment is improved. That is, the charge control circuit according to the embodiment of the application adopts a simple structure, so that impedance matching can be realized, the charge efficiency of the first battery and the second battery is improved, electric quantity consumption caused by the impedance matching part in the discharging process can be avoided, and the cruising ability of the electronic equipment is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural diagram of a charge control circuit according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of another charge control circuit according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of still another charge control circuit according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a charge control circuit according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of another charge control circuit according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of still another charge control circuit according to an embodiment of the present application;

reference numerals: 00-charging interface, 10-charging control module, 101-first charge mode control module, 102-second charge mode control module, 11-switch module, 12-impedance matching piece, 13-boost module, 14-sampling resistor, 100-first battery, 200-second battery.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The features of the terms "first", "second", and the like in the description and in the claims of this application may be used for descriptive or implicit inclusion of one or more such features. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1, there is shown a schematic configuration diagram of a charge control circuit according to an embodiment of the present application, which may be applied to an electronic device including a first battery 100 and a second battery 200. As shown in fig. 1, the charge control circuit may include at least: a charge control module 10, a switch module 11, and an impedance matching member 12; the switch module 11 and the impedance matching member 12 are connected in parallel between the charge control module 10 and the first battery 100; the second battery 200 is electrically connected with the output end of the charging control module 10; the operating states of the first battery 100 and the second battery 200 include a charged state and a discharged state, in which the switch module 11 is turned off and the impedance matching member 12 is energized to perform impedance matching in the case where the first battery 100 and the second battery 200 are both in the charged state, and in which the switch module 11 is turned on and energized to bypass the impedance matching member 12 in the case where the first battery 100 and the second battery 200 are both in the discharged state.

In this embodiment, the charging control circuit may be used to perform charging control on the first battery 100 and the second battery 200 of the electronic device. Since the charge control circuit comprises a charge control module 10, a switch module 11 and an impedance matching part 12; the switch module 11 and the impedance matching member 12 are connected in parallel between the charge control module 10 and the first battery 100. In the case where the first battery 100 and the second battery 200 are both in the charged state, the switch module 11 is turned off, and the impedance matching member 12 is energized to perform impedance matching, so as to achieve parallel high-current charging of the first battery 100 and the second battery 200, and improve charging efficiency. Under the condition that the first battery 100 and the second battery 200 are both in the discharging state, the switch module 11 is turned on to enable the impedance matching member 12 to be bypassed, so that extra power consumption caused by the impedance matching member 12 is avoided, and the cruising ability of the electronic device is improved. That is, according to the charge control circuit of the embodiment of the present application, impedance matching can be achieved, charging efficiency of the first battery 100 and the second battery 200 is improved, electric consumption caused by the impedance matching piece 12 in a discharging process can be avoided, and cruising ability of the electronic device is improved.

In a specific application, the capacities of the first battery 100 and the second battery 200 may be different, so, in order to realize parallel high-current charging of the two batteries with different capacities, impedance matching needs to be performed on one of the batteries in order to enable the impedance of the two batteries with different capacities to be consistent in the charging process, and improve the charging efficiency when both the first battery 100 and the second battery 200 are in the charging state. In this embodiment, since the impedance matching member 12 is electrically connected between the charge control module 10 and the first battery 100, the switch module 11 may be turned off when the first battery 100 and the second battery 200 are in the charging state, and the charge control module 10 may control the impedance matching member 12 to match the impedance of the first battery 100, so that the charging impedance of the first battery 100 is consistent with the charging impedance of the second battery 200, and the charging efficiency of the first battery 100 and the second battery 200 is improved.

For example, the capacity of the first battery 100 may be greater than the capacity of the second battery 200, or the capacity of the first battery 100 may be less than the capacity of the second battery 200, and the capacity of the first battery 100 and the second battery 200 may not be limited in the embodiments of the present application.

Alternatively, the impedance matching member 12 may be a matching resistor, so that when the matching resistor is connected between the charging control module 10 and the first battery 100, the impedance of the charging path where the first battery 100 is located may be directly changed, so that the impedance of the charging path where the first battery 100 is located is matched with the impedance of the charging path where the second battery 200 is located, so as to implement parallel high-current charging of the first battery 100 and the second battery 200. In practical application, the matching resistor is selected as the impedance matching member 12, and has the advantages of simple structure, high impedance matching efficiency and high stability.

In practical application, the impedance matching device 12 may be an electrical device such as a capacitor or an inductor, and the specific content of the impedance matching device 12 may not be limited in this embodiment.

In a particular application, the charge control module 10 may be a power management integrated circuit. The input end of the charging control module 10 may be connected to the charging interface 00 of the electronic device, and the output end of the charging control module 10 may be electrically connected to the switch module 11, the impedance matching member 12, and the like. In the case where the charging interface inputs the charging current, the charging control module 10 may control the charging of the first battery 100 and the second battery 200 according to actual needs.

Referring to fig. 2, which is a schematic diagram illustrating a structure of another charge control circuit according to an embodiment of the present application, as shown in fig. 2, the charge control module 10 may include: a first charge mode control module 101 and a second charge mode control module 102; wherein the first charge mode control module 101 and the second charge mode control module 102 are connected in parallel. In a specific application, the first charge mode control module 101 may control the first battery 100 and the second battery 200 to charge according to the first charge mode, and the second charge mode control module 102 may control the first battery 100 and the second battery 200 to charge according to the second charge mode. In this way, the first charging mode or the second charging mode can be selected according to actual needs to charge the first battery 100 and the second battery 200, so as to enrich the charging modes of the first battery 100 and the second battery 200, and enable the first battery 100 and the second battery 200 to adapt to different charging scenes.

By way of example, the first charging mode may be a fast charging mode and the second charging mode may be a normal speed charging mode. Alternatively, the first charging mode may be a normal speed charging mode and the second charging mode may be a fast charging mode. The specific content of the first charging mode and the second charging mode in the embodiments of the present application may not be limited.

As shown in fig. 2, the switching module 11 may be a field effect transistor, a first pole of which is electrically connected to the charge control module 10, and a second pole of which is electrically connected to the first battery 100, the first pole being one of a source and a drain, and the second pole being the other of the source and the drain. In the charging state, the charging control module 10 may control the first pole and the second pole of the fet to be disconnected, and at this time, the fet is in a non-conductive state, and the impedance matching component 12 is connected to the charging path of the first battery 100, and the impedance matching component 12 can match the impedance of the charging path of the first battery 100, so as to realize high-current charging of the first battery 100 and the second battery 200. Under the condition that the first battery 100 and the second battery 200 are both in the discharging state, the charging control module 10 may control the first pole and the second pole of the fet to be turned on, at this time, the fet is in the conducting state, the fet connected to the charging path of the first battery 100 is bypassed by the impedance matching component 12, so that the impedance matching component 12 is prevented from bringing additional power consumption, and the cruising ability of the electronic device is improved.

In a specific application, since the resistance of the fet in the on state is extremely low (the resistance is as low as 1-3mΩ), the amount of electricity consumed by the fet is extremely small when the fet is connected to the charging path of the first battery 100, and the influence on the cruising ability of the first battery 100 and the second battery 200 is also small.

As shown in fig. 2, the fet may be a P-type fet. Because the P-type field effect transistor can control the conduction of the field effect transistor only by adding a low level to the gate, when the first pole and the second pole of the P-type field effect transistor shown in fig. 2 need to be controlled to be conducted, the charging control module 10 only needs to output a low level signal to the gate of the P-type field effect transistor.

Referring to fig. 3, a schematic structural diagram of still another charge control circuit according to an embodiment of the present application is shown, and as shown in fig. 3, the fet is an N-type fet; the charging control circuit may further include a boost module 13, one end of the boost module 13 is electrically connected with the charging control module 10, the other end of the boost module 13 is connected with the gate of the field effect transistor, and the boost module 13 may be used for increasing the voltage output by the charging control module 10 to the gate, so as to control the on-off of the N-type field effect transistor.

In a specific application, since the N-type fet requires a high-voltage driving level to control the fet to turn on, a boost module 13 is required when the N-type fet is used as a pass switch. The boosting module 13 may pull the level signal output by the charging control module 10 high and output the level signal to the gate of the N-type field effect transistor, so as to control the first pole and the second pole of the N-type field effect transistor to be turned on.

In particular applications, a person skilled in the art may select a P-type field effect transistor or an N-type field effect transistor according to actual needs, and the specific type of the field effect transistor in the embodiments of the present application may not be limited.

Referring to fig. 4, a schematic diagram of a configuration of a charge control circuit according to an embodiment of the present application is shown, and referring to fig. 5, a schematic diagram of a configuration of another charge control circuit according to an embodiment of the present application is shown. As shown in fig. 4 and 5, the number of field effect transistors is plural, and the plural field effect transistors are connected in parallel between the charge control module 10 and the first battery 100.

In a specific application, the charge control module 10 may control the plurality of field effect transistors to be turned on when the first battery 100 and the second battery 200 are both in the charged state. At this time, the plurality of field effect transistors connected in parallel are equivalent to a plurality of small resistors connected in parallel, and the impedance of the plurality of field effect transistors connected in parallel is far smaller than that of a single field effect transistor, so that the electric quantity consumed by the field effect transistor can be further reduced, and the cruising ability of the electronic equipment is further improved.

For example, in the case where n field effect transistors are connected in parallel between the charge control module 10 and the first battery 100, the impedance of the plurality of field effect transistors after being connected in parallel corresponds to 1/n of that of a single field effect transistor.

As shown in fig. 4, in the case where the field effect transistor is a P-type field effect transistor, the P-type field effect transistors may be directly connected in parallel between the charge control module 10 and the first battery 100, and the charge control module 10 may control the P-type field effect transistors to be turned on by outputting a low level signal to the gates of the P-type field effect transistors.

As shown in fig. 5, in the case where the fet is an N-type fet, the charge control circuit may further include a boost module 13, one end of the boost module 13 is electrically connected to the charge control module 10, and the other end of the boost module 13 is connected to the gates of the N-type fets. The boost module 13 may be configured to boost the voltage output from the charge control module 10 to the gate of the N-type field effect transistor, so as to control on/off of the N-type field effect transistor.

Optionally, the charging control circuit may further include a sampling resistor 14, where the sampling resistor 14 is connected to the output terminal of the first battery 100; the charging control module 10 may include a first collecting port electrically connected between the first battery 100 and one end of the sampling resistor 14 for collecting a first voltage, and a second collecting port electrically connected to the other end of the sampling resistor 14 for collecting a second voltage, and the charging control module 10 may be configured to obtain an operating state of the first battery 100 based on the first voltage and the second voltage.

In a specific application, first cell 100 may include a positive electrode and a negative electrode, and one end of sampling resistor 14 may be connected to the negative electrode of first cell 100. The first collection port is electrically connected between the negative electrode of the first battery 100 and one end of the sampling resistor 14 to collect the first voltage BN, and the second collection port may be connected to the other end of the sampling resistor 14 to collect the second voltage BP. In the case where first battery 100 is in the discharge state, second voltage BP will be greater than first voltage BN. In the case where first battery 100 is in the charged state, second voltage BP will be smaller than first voltage BN. Therefore, by comparing the magnitudes of the first voltage BN and the second voltage BP, it is possible to determine whether the first battery 100 is in the charged state or the discharged state.

In this embodiment, since the first battery 100 and the second battery 200 are disposed inside the electronic device, after the charger is connected, the first battery 100 and the second battery 200 can be charged at the same time, and the first battery 100 and the second battery 200 can both enter the charging state. After the charger is turned off, the charging of the first battery 100 and the second battery 200 may be interrupted, and both the first battery 100 and the second battery 200 may enter the discharge state. Therefore, when the charge control module 10 determines that the first battery 100 is in the charging state, it may be considered that both the first battery 100 and the second battery 200 are in the charging state, at this time, the charge control module 10 may control the switch module 11 to be turned off, and the impedance matching member 12 is electrified to perform impedance matching, so as to achieve parallel high-current charging for the first battery 100 and the second battery 200, and improve charging efficiency. When the charge control module 10 determines that the first battery 100 is in the discharge state, it may be considered that both the first battery 100 and the second battery 200 are in the discharge state, and at this time, the charge control module 10 may control the switch module 11 to be turned on to enable the impedance matching component 12 to be bypassed, so as to avoid additional power consumption caused by the impedance matching component 12 and improve the cruising ability of the electronic device.

Referring to fig. 6, there is shown a schematic structural diagram of still another charge control circuit according to an embodiment of the present application, and as shown in fig. 6, the switch module 11 is a single pole double throw switch, one end of which is electrically connected to the charge control module 10, and the other end of which is electrically connected to the first battery 100. In the case where the first battery 100 and the second battery 200 are both in the charging state, the charging control module 10 may control the single-pole double-throw switch to be turned off, so that the impedance matching member 12 is electrified to perform impedance matching, thereby realizing parallel high-current charging of the first battery 100 and the second battery 200 and improving charging efficiency. Under the condition that the first battery 100 and the second battery 200 are both in the discharging state, the charging control module 10 may control the single-pole double-throw switch to be turned on, so that the impedance matching part 12 is bypassed, thereby avoiding additional power consumption caused by the impedance matching part 12 and improving the cruising ability of the electronic device.

In practical application, because the single-pole double-throw switch has the advantages of simple structure and simple control logic, the structure and the control logic of the charging control circuit can be further simplified and the structure cost and the use cost of the charging control circuit can be reduced under the condition that the single-pole double-throw switch is selected as the switch module 11.

In summary, the charge control circuit according to the embodiments of the present application may at least include the following advantages:

in the embodiment of the application, the charging control circuit may be used for controlling charging of the first battery and the second battery of the electronic device. Since the charge control circuit comprises a charge control module, a switch module and an impedance matching part; the switch module and the impedance matching member are connected in parallel between the charge control module and the first battery. And under the condition that the first battery and the second battery are both in the charging state, the switch module is disconnected, and the impedance matching part is electrified to perform impedance matching so as to realize parallel high-current charging of the first battery and the second battery and improve charging efficiency. And under the condition that the first battery and the second battery are both in the discharging state, the switch module is conducted and electrified so that the impedance matching part is bypassed, extra electric quantity consumption caused by the impedance matching part is avoided, and the cruising ability of the electronic equipment is improved. That is, the charge control circuit according to the embodiment of the application adopts a simple structure, so that impedance matching can be realized, the charge efficiency of the first battery and the second battery is improved, electric quantity consumption caused by the impedance matching part in the discharging process can be avoided, and the cruising ability of the electronic equipment is improved.

The embodiment of the application provides an electronic device, which specifically may include: a first battery, a second battery, and a charge control circuit according to any one of the above; the charging control circuit is electrically connected with the first battery and the second battery respectively.

It should be noted that in the implementation of the present application, the specific structure, the working distance and the beneficial effects of the charging control circuit are the same as those of the charging control circuit described in any of the foregoing embodiments, and the beneficial effects are also similar, and are not repeated here.

In this embodiment of the present application, the electronic device may include, but is not limited to, at least one of a mobile phone, a tablet computer, and a wearable device, and the specific type of the electronic device may not be limited in this embodiment of the present application.

In an optional embodiment of the present application, the electronic device may be a foldable electronic device, and the foldable electronic device may specifically include a first body and a second body that may be relatively folded, where the first battery may be disposed in the first body, and the second battery may be disposed in the second body.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A charge control circuit for use in an electronic device comprising a first battery and a second battery, the charge control circuit comprising: the charging control module, the switch module and the impedance matching part;

the switch module and the impedance matching part are connected in parallel between the charging control module and the first battery;

the second battery is electrically connected with the output end of the charging control module;

the working states of the first battery and the second battery comprise a charging state and a discharging state, the switch module is disconnected under the condition that the first battery and the second battery are both in the charging state, the impedance matching part is electrified to perform impedance matching, and the switch module is conducted under the condition that the first battery and the second battery are both in the discharging state, so that the impedance matching part is bypassed.

2. The charge control circuit of claim 1 wherein the switch module is a field effect transistor, a first pole of the field effect transistor is electrically connected to the charge control module, a second pole of the field effect transistor is electrically connected to the first battery, the first pole is one of a source and a drain, and the second pole is the other of the source and the drain;

and in the charging state, the charging control module controls the first pole and the second pole of the field effect transistor to be disconnected, and in the discharging state, the charging control module controls the first pole and the second pole of the field effect transistor to be conducted.

3. The charge control circuit of claim 2 wherein the fet is a P-fet.

4. The charge control circuit of claim 2, wherein the fet is an N-type fet;

the charging control circuit further comprises a boosting module, one end of the boosting module is electrically connected with the charging control module, the other end of the boosting module is connected with the grid electrode of the field effect transistor, and the boosting module is used for increasing the voltage output by the charging control module to the grid electrode.

5. The charge control circuit of claim 2, wherein the number of field effect transistors is a plurality, the plurality of field effect transistors being connected in parallel between the charge control module and the first battery.

6. The charge control circuit of claim 1, further comprising a sampling resistor connected to an output of the first battery;

the charging control module comprises a first collecting port and a second collecting port, wherein the first collecting port is electrically connected between the first battery and one end of the sampling resistor and is used for collecting first voltage, the second collecting port is electrically connected with the other end of the sampling resistor and is used for collecting second voltage, the charging control module is used for acquiring the working state of the first battery based on the first voltage and the second voltage, the switching module is disconnected under the condition that the first battery is in the charging state, the impedance matching part is electrified to perform impedance matching, and the switching module is electrified under the condition that the first battery is in the discharging state so that the impedance matching part is bypassed.

7. The charge control circuit of claim 1, wherein the charge control module comprises: the first charging mode control module and the second charging mode control module; wherein,,

the first charging mode control module and the second charging mode control module are connected in parallel.

8. The charge control circuit of claim 1 wherein the switch module is a single pole double throw switch.

9. The charge control circuit of any one of claims 1 to 8 wherein the impedance matching component is a matching resistor.

10. An electronic device, the electronic device comprising: a first battery, a second battery, and a charge control circuit according to any one of claims 1 to 9; wherein,,

the charging control circuit is electrically connected with the first battery and the second battery respectively.

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