CN111817388A - Charging circuit and electronic device - Google Patents

Charging circuit and electronic device Download PDF

Info

Publication number
CN111817388A
CN111817388A CN202010676522.9A CN202010676522A CN111817388A CN 111817388 A CN111817388 A CN 111817388A CN 202010676522 A CN202010676522 A CN 202010676522A CN 111817388 A CN111817388 A CN 111817388A
Authority
CN
China
Prior art keywords
charging
battery
electronic device
branch
node
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010676522.9A
Other languages
Chinese (zh)
Inventor
邱培
张俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN202010676522.9A priority Critical patent/CN111817388A/en
Publication of CN111817388A publication Critical patent/CN111817388A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The disclosure relates to a charging circuit and an electronic device, wherein the charging circuit comprises a first battery, a second battery, a charging interface, a first charging branch and a second charging branch, the second battery is connected with the first battery in parallel, and a first electrode of the first battery and a first electrode of the second battery are connected with a first node; the charging interface is used for receiving a power supply signal; the first end of the first charging branch is connected with the charging interface, the second end of the first charging branch is connected with the first node, and the first charging branch is used for charging the first battery and the second battery in a first charging mode; the first end of the second charging branch is connected with the charging interface, the second end of the second charging branch is connected with the first node, and the second charging branch is used for charging the first battery and the second battery in a second charging mode; the charging power of the first charging mode is greater than the charging power of the second charging mode. The amount of heat generated when the electronic device is charged can be reduced.

Description

Charging circuit and electronic device
Technical Field
The present disclosure relates to the technical field of electronic devices, and in particular, to a charging circuit and an electronic device.
Background
As technology has developed and advanced, foldable electronic devices have gradually come into use. A plurality of batteries are often disposed in the foldable electronic device, and the foldable electronic device needs to charge the plurality of batteries at the same time when charging. In an electronic device, charging efficiency of the electronic device is often improved by increasing charging power of the electronic device. When the charging power of the electronic equipment is increased, the electronic equipment generates heat seriously in the charging process, so that the electronic equipment has larger potential safety hazard.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The present disclosure is directed to a charging circuit and an electronic device, and further to reduce the amount of heat generated by the electronic device at least to some extent.
According to a first aspect of the present disclosure, there is provided a charging circuit, comprising:
a first battery;
a second battery connected in parallel with the first battery, and a first electrode of the first battery and a first electrode of the second battery are connected to a first node;
the charging interface is used for receiving a power supply signal;
a first charging branch, a first end of which is connected to the charging interface, a second end of which is connected to the first node, and the first charging branch is used for charging the first battery and the second battery in a first charging mode;
a second charging branch, a first end of the second charging branch is connected to the charging interface, a second end of the second charging branch is connected to the first node, and the second charging branch is used for charging the first battery and the second battery in a second charging mode;
wherein the charging power of the first charging mode is greater than the charging power of the second charging mode.
According to a second aspect of the present disclosure, there is provided an electronic device including the charging circuit described above.
The charging circuit provided by the embodiment of the disclosure supplies power to the first battery and the second battery which are connected in parallel through the first charging branch in the first charging mode, supplies power to the first battery and the second battery which are connected in parallel through the second charging branch in the second mode, and uses different charging branches through the first charging mode and the second charging mode respectively, so that devices on the first charging branch can be reduced, the resistance value on the first charging branch in the first charging mode can be reduced, the heating value during charging is reduced, and the potential safety hazard of electronic equipment is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic block diagram of a first charging circuit provided in an exemplary embodiment of the present disclosure;
fig. 2 is a schematic block diagram of a second charging circuit provided in an exemplary embodiment of the present disclosure;
fig. 3 is a schematic block diagram of a third charging circuit provided in an exemplary embodiment of the present disclosure;
fig. 4 is a schematic block diagram of a fourth charging circuit provided in an exemplary embodiment of the present disclosure;
fig. 5 is a schematic block diagram of a fifth charging circuit provided in an exemplary embodiment of the present disclosure;
fig. 6 is a schematic diagram of a first electronic device provided in an exemplary embodiment of the present disclosure;
fig. 7 is a schematic diagram of a second electronic device provided in an exemplary embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other methods, components, materials, devices, steps, and so forth. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in the form of software, or in one or more software-hardened modules, or in different networks and/or processor devices and/or microcontroller devices.
An exemplary embodiment of the present disclosure first provides a charging circuit, as shown in fig. 1, including: the first battery 110, the second battery 120, the charging interface 310, the first charging branch 210 and the second charging branch 220, the second battery 120 and the first battery 110 are connected in parallel, and a first electrode (positive electrode) of the first battery 110 and a first electrode (positive electrode) of the second battery 120 are connected to a first node P; the charging interface 310 is used for receiving a power signal; a first end of the first charging branch 210 is connected to the charging interface 310, a second end of the first charging branch 210 is connected to the first node P, and the first charging branch 210 is configured to charge the first battery 110 and the second battery 120 in the first charging mode; a first end of the second charging branch 220 is connected to the charging interface 310, a second end of the second charging branch 220 is connected to the first node P, and the second charging branch 220 is configured to charge the first battery 110 and the second battery 120 in the second charging mode; the charging power of the first charging mode is larger than that of the second charging mode.
The charging circuit provided by the embodiment of the disclosure supplies power to the first battery 110 and the second battery 120 which are connected in parallel through the first charging branch 210 in the first charging mode, supplies power to the first battery 110 and the second battery 120 which are connected in parallel through the second charging branch 220 in the second mode, and uses different charging branches through the first charging mode and the second charging mode respectively, so that devices on the first charging branch 210 can be reduced, the resistance value on the first charging branch 210 in the first charging mode can be reduced, the heat productivity during charging is reduced, and the potential safety hazard of electronic equipment is reduced.
Further, as shown in fig. 5, the charging circuit provided in the embodiment of the present disclosure may further include a first electricity meter 130, a second electricity meter 140, and a bidirectional current limiting module 150. The first electricity meter 130 is disposed between the first battery 110 and the first node P, and the first electricity meter 130 is used to detect the voltage and current of the first battery 110. The second electricity meter 140 is provided between the second battery 120 and the first node P, and the second electricity meter 140 is used to detect the voltage and current of the second battery 120. A first terminal of the bidirectional current limiting module 150 is connected to the first node P, and a second terminal of the bidirectional current limiting module 150 is connected to the first electrode of the second battery 120.
The charging and discharging current and the charging and discharging voltage of the first battery 110 are detected by the first electricity meter 130, and the charging and discharging current and the charging and discharging voltage of the second battery 120 are detected by the second electricity meter 140, so that the states of the first battery 110 and the second battery 120 are independently detected, and the charging process of the first battery 110 and the second battery 120 is controlled; the distribution of the charging current of the first battery 110 and the second battery 120 can be achieved by the bidirectional current limiting module 150.
The following will describe each part of the charging circuit provided by the embodiment of the present disclosure in detail:
in the embodiment of the present disclosure, the positive electrode of the first battery 110 is connected to the positive electrode of the second battery 120 (both connected to the first node P), and the negative electrode of the first battery 110 is connected to the negative electrode of the second battery 120 (both connected to ground). The first charging branch 210 may be a fast charging branch, and the second charging branch 220 may be a pre-charging and normal charging branch. The charging power of the first charging branch 210 is greater than the charging power of the second charging branch 220, and for example, the charging current of the first charging branch 210 is greater than the charging current of the second charging branch 220. The pre-charging means that in the charging process of batteries such as lithium ion batteries, electronic equipment is usually required to be pre-charged first, so that the situation that the service life of the batteries is influenced or the batteries are damaged when the batteries directly enter a quick charging mode is avoided.
As shown in fig. 2, the first charging branch 210 may include a direct charging switch 211 and a voltage conversion module 212, a first terminal of the direct charging switch 211 is connected to the charging interface 310, a second terminal of the direct charging switch 211 is connected to the voltage conversion module 212, and the direct charging switch 211 is turned on in response to the direct charging control signal. The second end of the voltage conversion module 212 is connected to the first node P, and the voltage conversion module 212 is configured to adjust the voltage of the signal output by the direct charging switch 211.
The direct charging control signal may include a first control signal, and the direct charging switch 211 may be a MOS transistor, an electromagnetic contact switch, or a relay switch. The direct charging switch 211 may include a first end (input end), a second end (output end), and a control end, the first end of the direct charging switch 211 is connected to the charging interface 310, the second end of the direct charging switch 211 is connected to the first node P, the control end of the direct charging switch 211 receives the first mode control signal, and the direct charging switch 211 is turned on in response to the first mode control signal to transmit the power signal to the first end of the voltage conversion module 212.
For example, when the direct charging switch 211 is a MOS transistor, the first terminal of the MOS transistor may be a source, the second terminal of the MOS transistor may be a drain, and the control terminal of the MOS transistor is a gate. Or the first end of the MOS transistor may be a drain, and the second end of the MOS transistor may be a source, which is not specifically limited in this disclosure. The direct charging switch 211 may be an N-type MOS transistor or a P-type MOS transistor, and when the direct charging switch 211 is an N-type MOS transistor, the first mode control signal may be a high level signal; when the direct charging switch 211 is a P-type MOS transistor, the first mode control signal may be a low level signal.
As shown in fig. 3, the voltage conversion module 212 may include a charge pump 2121, a first terminal of the direct charge switch 211 is connected to the charging interface 310, a second terminal of the direct charge switch 211 is connected to the first terminal of the charge pump 2121, and the direct charge switch 211 is turned on in response to the direct charge control signal. A first terminal of the charge pump 2121 is connected to the first terminal of the direct charging switch 211, and a second terminal of the charge pump 2121 is connected to the first node P. Of course, in practical applications, the voltage conversion module may also include other DC-DC circuits, and the embodiments of the present disclosure are not limited thereto.
A first terminal (input terminal) of the charge pump 2121 is connected to the first terminal of the direct charge switch 211, and a second terminal (output terminal) of the charge pump 2121 is connected to the first node P. The charge pump 2121 is used to adjust the charging current and the charging voltage of the first charging branch 210, for example, the charge pump 2121 may be used to decrease the voltage of the power signal and increase the charging current of the first charging branch 210, and the charge pump 2121 may be a 2:1 charge pump 2121, that is, the charge pump 2121 can halve the voltage of the first charging branch 210 by half the current.
When the first charging branch 210 is turned on, the battery impedance ratio is configured to be consistent with the battery capacity ratio. The battery impedance ratio is a ratio of the impedance of the charging path of the first battery 110 and the impedance of the charging path of the second battery 120 to the first battery 110. The capacity ratio of the batteries is a ratio of the capacity of the first battery 110 to the capacity of the second battery 120. When the difference between the battery impedance ratio and the battery capacity ratio is within a preset range value, the battery impedance ratio and the battery capacity ratio are considered to be consistent. The amount of heat generated during charging can be reduced by matching the battery impedance ratio and the battery capacity ratio, and the loss of energy during discharging of the battery can be reduced.
The second charging branch 220 includes a power management module 222 and an overvoltage protection module 221, a first end (input end) of the overvoltage protection module 221 is connected to the charging interface 310, a second end (output end) of the overvoltage protection module 221 is connected to the first end (input end) of the power management module 222, a second end (output end) of the power management module 222 is connected to the first node P, and the power management module 222 is configured to convert a power signal into a second charging signal and transmit the second charging signal to the first node P.
The Overvoltage Protection module 221 (e.g., OVP 2211, Overvoltage Protection) is configured to provide Protection for a downstream circuit (e.g., the power management module 222), so as to prevent a circuit device from being damaged by a high voltage due to an excessively high voltage transmitted to the downstream circuit such as the power management module 222. The overvoltage protection module 221 monitors the dc voltage received by the charging interface 310, and determines whether overvoltage protection is required according to a voltage value of the dc voltage. When the dc voltage value received by the charging interface 310 is greater than the preset threshold, the second charging branch 220 is subjected to overvoltage protection.
For example, the second charging branch 220 may be over-voltage protected by a crowbar clamp or a series switch. The crowbar clamping circuit is internally provided with a fuse, and when the voltage of a power supply signal is greater than a preset threshold value, the fuse can be fused to protect the circuit. Alternatively, a series protection switch may be disposed on the second charging branch 220, and the series protection switch is turned off when the voltage of the power signal is greater than a preset threshold.
The power management module 222 (e.g., PMIC 2221) is used to manage charging and discharging of the first battery 110 and the second battery 120, and the power management module 222 may include a switch circuit and a management circuit. The switching circuit may include a normal charge switch, which may be turned on in response to the second mode control signal, so that the first battery 110 and the second battery 120 may be charged through the second charging branch 220. The management circuit is used for controlling the charging current and the charging voltage of the second charging branch 220.
The power management module 222 further includes a third terminal (discharging terminal SK), and power can be supplied to electrical devices (such as a display device, a processor, a memory, a camera module, an audio module, and the like) in the electronic device through the third terminal of the power management module 222 during the charging process and the discharging process of the battery. In the charging process, the power supply signal input by the charging interface 310 supplies power to the electrical devices in the electronic device through the third terminal of the power management module 222; or power can be supplied to the electrical equipment in the electronic device through the first battery 110 and/or the second battery 120 through the third terminal of the power management module 222; the power signal input through the charging interface 310 and the combination of the first battery 110 and/or the second battery 120 may also be used to supply power to the electrical devices in the electronic device, which is not particularly limited in the embodiment of the present disclosure.
The management circuit may include a voltage regulation circuit and a current regulation circuit, the management circuit may be connected to a processor in the electronic device, and the voltage regulation circuit and the current regulation circuit may control the charging signal or the discharging signal output by the second charging branch 220 in response to the charging/discharging management signal sent by the processor.
The first control signal may be provided by a processor of the electronic device or by the power management module 222. When the electronic device detects that the charging interface 310 is connected to the first mode adapter (fast charging adapter), the processor of the electronic device provides or the power management module 22 provides the first control signal to the direct charging switch 211, the first charging branch 210 is turned on, and the electronic device performs the first mode charging. The second control signal may be provided by a processor of the electronic device or by the power management module 222. When the electronic device detects that the charging interface 310 is connected to the second mode adapter (normal charging adapter), the processor of the electronic device provides or the power management module 22 provides the second control signal to the switch circuit, the second charging branch 220 is turned on, and the electronic device performs the second mode charging. Of course, when the charging interface 310 is connected to the first mode adapter in the pre-charging mode, the direct charging switch 211 is turned off, and the electronic device is still charged in the second mode.
The first electricity meter 130 is disposed between the first battery 110 and the first node P, and the first electricity meter 130 is configured to detect a voltage and a current of the first battery 110; the second electricity meter 140 is provided between the second battery 120 and the first node P, and the second electricity meter 140 is used to detect the voltage and current of the second battery 120.
The first battery 110 may include a first cell 111 and a first protective sheet 112, the first protective sheet 112 being mounted to the first cell 111. Electrode tabs, such as a positive electrode tab and a negative electrode tab, may be disposed on the first cell 111. The protection board may include a circuit board, on which a plurality of pins are disposed, wherein the electrode pads of the first battery cell 111 may be connected to the pins on the circuit board. The first electricity meter 130 is disposed on the first protection plate 112, and the first electricity meter 130 may be connected to an electrode tab of the first cell 111.
The first electricity meter 130 may include a current detection unit for detecting a charge and discharge current of the first battery 110 and a voltage detection unit for detecting a charge and discharge voltage of the first battery 110. The first electricity meter 130 may be connected to the power management module 222, and the battery management module acquires a detection result of the first electricity meter 130 and controls charging according to the detection result of the first electricity meter 130. Meanwhile, the first electricity meter 130 may be connected to a processor of the electronic device, and since the first charging branch 210 is controlled by the first mode control signal, the first electricity meter 130 is connected to the processor of the electronic device, and the processor outputs the first mode control signal according to a detection result of the first electricity meter 130.
The second battery 120 may include a second cell 121 and a second protective plate 122, and the second protective plate 122 is mounted to the second cell 121. Electrode pads, such as a positive electrode pad and a negative electrode pad, may be disposed on the second cell 121. The protection board may include a circuit board, and a plurality of pins are disposed on the circuit board, where the electrode plate of the second cell 121 may be connected to the pins on the circuit board. The second electricity meter 140 is disposed on the second protection plate 122, and the second electricity meter 140 may be connected to an electrode tab of the second cell 121.
The second electricity meter 140 may include a current detecting unit for detecting a charge and discharge current of the second battery 120 and a voltage detecting unit for detecting a charge and discharge voltage of the second battery 120. The second electricity meter 140 may be connected to the power management module 222, and the battery management module acquires a detection result of the second electricity meter 140 and controls charging according to the detection result of the second electricity meter 140. Meanwhile, the second electricity meter 140 may be connected to a processor of the electronic device, and since the second charging branch 220 is controlled by the second mode control signal, the second electricity meter 140 is connected to the processor of the electronic device, and the processor outputs the second mode control signal according to a detection result of the second electricity meter 140.
As shown in fig. 4, a first terminal of the bidirectional current limiting module 150 is connected to the first node P, and a second terminal of the bidirectional current limiting module 150 is connected to the first electrode of the second battery 120. The bidirectional current limiting module 150 may include a bidirectional current limiting switch (Load switch) that limits a charging current of the second battery 120 during a charging process. During discharge, the bidirectional current limiting switch may be used to limit current between the first battery 110 and the second battery 120 when a voltage difference between the first battery 110 and the second battery 120 is greater than a preset threshold. The voltage difference between the first battery 110 and the second battery 120 may be detected by the first electricity meter 130 and the second electricity meter 140, and the control terminal of the bidirectional current limit switch may be connected to the power management module 222 or a processor of the electronic device. The power management module 222 or a processor of the electronic device outputs a current limit control signal to control the bidirectional current limit switch according to the voltage difference between the first battery 110 and the second battery 120.
When the first battery 110 and the second battery 120 are fastened to the receptacle of the electronic device, the bidirectional current limiting switch may be in an off state to isolate the first battery 110 from the second battery 120. When the battery is buckled, the electronic equipment can enter an engineering mode, at the moment, the power management circuit or the processor of the electronic equipment can output a buckling control signal, and the bidirectional current limiting switch responds to the buckling control signal to be turned off.
The charging circuit provided by the embodiment of the present disclosure may be used in a foldable electronic device, and the capacities of the first battery 110 and the second battery 120 are different due to the different volumes of the batteries that can be arranged on both sides of the folding line in the foldable electronic device. In the present embodiment, the capacity of first battery 110 is larger than the capacity of second battery 120.
It should be noted that the charging interface 310 provided in the embodiment of the present disclosure may be a Micro-USB interface, a Type-c interface, a contact interface, and the like, and this is not specifically limited in the embodiment of the present disclosure.
The charging circuit provided by the embodiment of the disclosure supplies power to the first battery 110 and the second battery 120 which are connected in parallel through the first charging branch 210 in the first charging mode, supplies power to the first battery 110 and the second battery 120 which are connected in parallel through the second charging branch 220 in the second mode, and uses different charging branches through the first charging mode and the second charging mode respectively, so that devices on the first charging branch 210 can be reduced, the resistance value on the first charging branch 210 in the first charging mode can be reduced, the heat productivity during charging is reduced, and the potential safety hazard of electronic equipment is reduced.
Further, by providing the first electricity meter 130 on the first battery 110 and the second electricity meter 140 on the second battery 120, it is possible to detect the current and the voltage of the first battery 110 and the second battery 120, respectively, so as to adjust the charging mode and the charging parameter of the first battery 110 and the second battery 120. Distribution of the first and second battery 110 and 120 currents can be managed by a bidirectional current limiting module 150 disposed between the first and second battery 110 and 120.
The exemplary embodiment of the present disclosure also provides an electronic device including the charging circuit described above.
Further, as shown in fig. 6, the electronic device may further include a first case 410, a second case 420, a first circuit board 430, and a second circuit board 440, wherein the first case 410 has a first accommodating portion 411, and the first battery 110 and the first circuit board 430 are disposed in the first accommodating portion 411; the second housing 420 has a second receiving portion 421, the second housing 420 is connected to the first housing 410, the second battery 120 and the second circuit board 440 are disposed in the second receiving portion, and the charging connector 310 is disposed on a side of the first housing 410 away from the second housing 420. The first charging branch 210 includes a first connection line 213, and the first connection line 213 connects the charging interface 310 and the first battery 110. The first circuit board 430 is disposed in the first accommodating portion 411, and the direct charging switch 211 and the charge pump 2121 are disposed on the first circuit board 430. The second circuit board 440 is disposed in the second receiving portion 421, and the power management module 222 is disposed on the second circuit board 440.
By connecting charging interface 310 and first battery 110 via first connection line 213, the length of the charging path of first battery 110 in the first charging mode can be reduced, the resistance of the charging path can be reduced, and the amount of heat generated during charging can be reduced.
The first battery 110 may include a first cell 111 and a first protection plate 112, the first protection plate 112 is disposed on the first cell 111, the first electricity meter 130 is disposed on the first protection plate 112, and the first electricity meter 130 is connected to the first cell 111.
The second battery 120 may include a second cell 121 and a second protection plate 122, the second protection plate 122 is disposed on the second cell 121, the second electricity meter 140 is disposed on the second protection plate 122, and the second electricity meter 140 and the second cell 121 are connected.
Further, the first charging branch 210 may further include a second connection line 223, and the second connection line 223 connects the first connection line 213 and the second battery 120. One end of the second connection line 223 is connected to the first connection line 213, and a second end of the second connection line 223 may be connected to a protection plate of the second battery 120. The first connection line 213 may be connected to the output terminal of the charge pump 2121 and the protection board of the first battery 110.
The electronic device provided by the embodiment of the present disclosure may be a foldable electronic device, and in this case, the electronic device may further include a hinge 510, and the first housing 410 and the second housing 420 are hinged by the hinge 510. As shown in fig. 7, the first case 410 may include a first middle frame 412 and a first rear cover 413, the first middle frame 412 and the first rear cover 413 forming a first receiving portion 411, the first circuit board 430 and the first battery 110 being disposed at the first receiving portion 411. The second case 420 may include a second middle frame 422 and a second rear cover 423, the second middle frame 422 and the second rear cover 423 forming a second receiving portion 421, and the second circuit board 440 and the second battery 120 are disposed at the second receiving portion 421.
The first middle frame 412 and the second middle frame 422 may be metal middle frames, and when the first middle frame 412 is a metal middle frame, the antenna radiator of the electronic device may be disposed on the metal middle frame. Alternatively, the first middle frame 412 and the second middle frame 422 may be non-metal middle frames, such as plastic middle frames and glass middle frames. Of course, in practical applications, the materials of the first middle frame 412 and the second middle frame 422 may also be different, for example, the first middle frame 412 is a metal middle frame, and the second middle frame 422 is a glass middle frame, which is not particularly limited in this disclosure.
The first rear cover 413 and the second rear cover 423 may be a split structure or an integrated structure, when the first middle frame 412 and the second middle frame 422 are non-metal middle frames, the first rear cover 413 and/or the second rear cover 423 may be metal rear covers, and an antenna radiator of the electronic device may be disposed on the first rear cover 413 and/or the second rear cover 423. The first and second rear covers 413 and 423 may be flexible rear covers.
The capacity of the first battery 110 is greater than the capacity of the second battery 120, and thus the volume of the first battery 110 is greater than the volume of the second battery 120. The receiving cavities of the first housing 410 and the second housing 420 have similar volumes, so that the area of the first circuit board 430 is smaller than that of the second circuit board 440, and the second circuit board 440 may be a main board of an electronic device. The first circuit board 430 may be mounted to the first middle frame 412, and the second circuit board 440 may be mounted to the second middle frame 422. The first circuit board 430 and the second circuit board 440 may each be provided with a ground point.
One or more of the functional modules such as a motor, a microphone, a speaker, a receiver, an earphone interface, a universal serial bus interface (USB interface), a camera, a sensor module, a gyroscope, and a processor may be integrated on the second circuit board 440.
Wherein, the sensor module can include degree of depth sensor, pressure sensor, gyroscope sensor, baroceptor, magnetic sensor, acceleration sensor, distance sensor, be close optical sensor, fingerprint sensor, temperature sensor, touch sensor, ambient light sensor and bone conduction sensor etc.. The Processor may include an Application Processor (AP), a modem Processor, a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a video codec, a Digital Signal Processor (DSP), a baseband Processor, and/or a Neural Network Processor (NPU), and the like. The different processing units may be separate devices or may be integrated into one or more processors. The processor may be connected to the direct charging switch 211 and the power management module 222 to provide corresponding control signals to the direct charging switch 211 and the power management module 222.
And a display screen is arranged on one side of the middle frame, which is far away from the rear cover, and the display screen can be a flexible display screen. The flexible display screen may include a first display portion 610 and a second display portion 620. The first display portion 610 is connected to the first middle frame 412, that is, the first display portion 610 covers the first battery 110. The second display portion 620 is connected to the second middle frame 422, that is, the second display area covers the second battery 120. A bendable portion 630 is disposed between the first display portion 610 and the second display portion 620, the bendable portion 630 is a flexible display portion, and the bendable portion 630 covers the rotating shaft 510. The first display portion 610 and the second display portion 620 of the display screen may display in a split screen manner or in a whole screen manner.
The display screen may be a display screen forming a display surface of the electronic device for displaying information such as images, text, and the like. The Display screen may be a Liquid Crystal Display (LCD) or an organic light-Emitting Diode (OLED) Display screen.
The display screen can be provided with a flexible cover plate. Wherein, flexible apron can cover the display screen to protect the display screen, prevent that the display screen from being scratched or by the water damage. The display screen may include a display area and a non-display area. The display area performs a display function of the display screen for displaying information such as images and texts. The non-display area does not display information. The non-display area can be used for arranging functional modules such as a camera, a receiver, a proximity sensor and the like. In some embodiments, the non-display area may include at least one area located at an upper portion and a lower portion of the display area.
The display screen may be a full-face screen. At this time, the display screen can display information in a full screen, so that the electronic device has a larger screen occupation ratio. The display screen includes only display areas and no non-display areas. At this moment, functional modules such as camera, proximity sensor among the electronic equipment can hide in the display screen below, and electronic equipment's fingerprint identification module can set up the back at electronic equipment.
The electronic device provided by the embodiment of the disclosure includes a charging circuit, the first charging branch 210 supplies power to the first battery 110 and the second battery 120 which are connected in parallel in the first charging mode, the second charging branch 220 supplies power to the first battery 110 and the second battery 120 which are connected in parallel in the second mode, and the first charging branch 210 and the second charging mode respectively use different charging branches, so that devices on the first charging branch 210 can be reduced, the resistance value on the first charging branch 210 in the first charging mode can be reduced, the heat generation amount during charging can be reduced, and the potential safety hazard of the electronic device can be reduced.
Further, by providing the first electricity meter 130 on the first battery 110 and the second electricity meter 140 on the second battery 120, it is possible to detect the current and the voltage of the first battery 110 and the second battery 120, respectively, so as to adjust the charging mode and the charging parameter of the first battery 110 and the second battery 120. Distribution of the first and second battery 110 and 120 currents can be managed by a bidirectional current limiting module 150 disposed between the first and second battery 110 and 120.
By connecting charging interface 310 and first battery 110 via first connection line 213, the length of the charging path of first battery 110 in the first charging mode can be reduced, the resistance of the charging path can be reduced, and the amount of heat generated during charging can be reduced.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the terms of the appended claims.

Claims (16)

1. A charging circuit, comprising:
a first battery;
a second battery connected in parallel with the first battery, and a first electrode of the first battery and a first electrode of the second battery are connected to a first node;
the charging interface is used for receiving a power supply signal;
a first charging branch, a first end of which is connected to the charging interface, a second end of which is connected to the first node, and the first charging branch is used for charging the first battery and the second battery in a first charging mode;
a second charging branch, a first end of the second charging branch is connected to the charging interface, a second end of the second charging branch is connected to the first node, and the second charging branch is used for charging the first battery and the second battery in a second charging mode;
wherein the charging power of the first charging mode is greater than the charging power of the second charging mode.
2. The charging circuit of claim 1, wherein the first charging branch comprises:
the direct charging switch is connected with the charging interface at a first end, connected with the first node at a second end and turned on in response to a direct charging control signal.
3. The charging circuit of claim 2, wherein the first charging branch further comprises:
and the first end of the voltage conversion module is connected with the second end of the direct charging switch, the second end of the voltage conversion module is connected with the first node, and the voltage conversion module is used for adjusting the voltage of a signal output by the direct charging switch.
4. The charging circuit of claim 3, wherein the voltage conversion module comprises:
and the first end of the charge pump is connected with the second end of the direct charging switch, and the second end of the charge pump is connected with the first node.
5. The charging circuit of claim 1, wherein the second charging branch comprises:
the power management module is arranged between the electrical interface and the first node, and is used for converting the power signal into a second charging signal and transmitting the second charging signal to the first node.
6. The charging circuit of claim 5, wherein the second charging branch further comprises:
and the first end of the overvoltage protection module is connected with the charging interface, and the second end of the overvoltage protection module is connected with the power management module.
7. The charging circuit of claim 1, further comprising:
a first electricity meter provided between the first battery and the first node, the first electricity meter being configured to detect a voltage and a current of the first battery;
a second electricity meter provided between the second battery and the first node, the second electricity meter being configured to detect a voltage and a current of the second battery.
8. The charging circuit of claim 1, further comprising:
and the first end of the bidirectional current limiting module is connected with the first node, and the second end of the bidirectional current limiting module is connected with the first electrode of the second battery.
9. The charging circuit according to any of claims 1-8, wherein the capacity of the first battery is greater than the capacity of the second battery.
10. An electronic device, characterized in that the electronic device comprises a charging circuit according to any of claims 1-9.
11. The electronic device of claim 10, wherein the electronic device further comprises:
the first shell is provided with a first accommodating part, and the first battery is arranged in the first accommodating part;
the second shell is provided with a second containing part, the second shell is connected with the first shell, the second battery is arranged in the second containing part, the charging interface is arranged on one side, far away from the second shell, of the first shell, the first charging branch comprises a first connecting wire, and the first connecting wire is connected with the charging interface and the first battery.
12. The electronic device of claim 11, wherein the first charging branch further comprises:
a second connection line connecting the first connection line and the second battery.
13. The electronic device of claim 11, wherein the electronic device further comprises:
the first circuit board is arranged in the first accommodating portion, the direct charging switch is arranged on the first circuit board, the first end of the direct charging switch is connected with the charging interface, and the second end of the direct charging switch is connected with the first connecting wire.
14. The electronic device of claim 11, wherein the first battery comprises:
a first cell;
the first protection plate is arranged on the first battery cell, the first electricity meter is arranged on the first protection plate, and the first electricity meter is connected with the first battery cell;
the second battery includes:
a second cell;
the second protection plate is arranged on the second battery cell, the second electricity meter is arranged on the second protection plate, and the second electricity meter is connected with the second battery cell.
15. The electronic device of claim 11, wherein the electronic device further comprises:
the second circuit board is arranged in the second accommodating part, and the power management module is arranged on the second circuit board.
16. The electronic device of any of claims 11-15, wherein the electronic device further comprises:
the first shell and the second shell are hinged through the rotating shaft.
CN202010676522.9A 2020-07-14 2020-07-14 Charging circuit and electronic device Pending CN111817388A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010676522.9A CN111817388A (en) 2020-07-14 2020-07-14 Charging circuit and electronic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010676522.9A CN111817388A (en) 2020-07-14 2020-07-14 Charging circuit and electronic device

Publications (1)

Publication Number Publication Date
CN111817388A true CN111817388A (en) 2020-10-23

Family

ID=72865367

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010676522.9A Pending CN111817388A (en) 2020-07-14 2020-07-14 Charging circuit and electronic device

Country Status (1)

Country Link
CN (1) CN111817388A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113872300A (en) * 2021-10-20 2021-12-31 东莞新能德科技有限公司 Battery management system, terminal equipment and battery charging and discharging method thereof

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130229153A1 (en) * 2010-09-21 2013-09-05 Proterra Inc Systems and methods for equivalent rapid charging with different energy storage configurations
CN105246547A (en) * 2013-05-28 2016-01-13 皇家飞利浦有限公司 Dual battery fast charging defibrillator
CN108604807A (en) * 2016-10-12 2018-09-28 广东欧珀移动通信有限公司 Charging equipment and charging method
US20190006722A1 (en) * 2017-06-28 2019-01-03 Samsung Electronics Co., Ltd. Method for controlling a plurality of batteries and electronic device thereof
CN110277813A (en) * 2019-06-13 2019-09-24 华为技术有限公司 Foldable electronic device
CN110336353A (en) * 2019-07-09 2019-10-15 Oppo广东移动通信有限公司 Battery, circuit system and its control method, electronic equipment
CN110676898A (en) * 2019-09-16 2020-01-10 Oppo广东移动通信有限公司 Device to be charged
US20200036198A1 (en) * 2018-07-26 2020-01-30 Samsung Electronics Co., Ltd. Electronic device and method for managing battery thereof
CN111262296A (en) * 2020-02-28 2020-06-09 Oppo广东移动通信有限公司 Double-battery charging structure and mobile terminal
CN111277040A (en) * 2020-02-04 2020-06-12 Oppo广东移动通信有限公司 Electronic equipment and power supply method

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130229153A1 (en) * 2010-09-21 2013-09-05 Proterra Inc Systems and methods for equivalent rapid charging with different energy storage configurations
CN105246547A (en) * 2013-05-28 2016-01-13 皇家飞利浦有限公司 Dual battery fast charging defibrillator
CN108604807A (en) * 2016-10-12 2018-09-28 广东欧珀移动通信有限公司 Charging equipment and charging method
US20190006722A1 (en) * 2017-06-28 2019-01-03 Samsung Electronics Co., Ltd. Method for controlling a plurality of batteries and electronic device thereof
US20200036198A1 (en) * 2018-07-26 2020-01-30 Samsung Electronics Co., Ltd. Electronic device and method for managing battery thereof
CN110277813A (en) * 2019-06-13 2019-09-24 华为技术有限公司 Foldable electronic device
CN110336353A (en) * 2019-07-09 2019-10-15 Oppo广东移动通信有限公司 Battery, circuit system and its control method, electronic equipment
CN110676898A (en) * 2019-09-16 2020-01-10 Oppo广东移动通信有限公司 Device to be charged
CN111277040A (en) * 2020-02-04 2020-06-12 Oppo广东移动通信有限公司 Electronic equipment and power supply method
CN111262296A (en) * 2020-02-28 2020-06-09 Oppo广东移动通信有限公司 Double-battery charging structure and mobile terminal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113872300A (en) * 2021-10-20 2021-12-31 东莞新能德科技有限公司 Battery management system, terminal equipment and battery charging and discharging method thereof
CN113872300B (en) * 2021-10-20 2024-03-26 东莞新能德科技有限公司 Battery management system, terminal equipment and battery charging and discharging method thereof

Similar Documents

Publication Publication Date Title
US10236701B2 (en) System, mobile device, and charging device
US9509160B2 (en) Fast charging terminal
EP2533348B1 (en) Charging system and charging method
CN102055221B (en) Battery pack
CN102110976B (en) For the protective circuit of battery pack
CN105426332B (en) Communication interface circuit, portable electronic device and electronic system
CN111817387A (en) Charging circuit, control method thereof and electronic equipment
KR20130098680A (en) Battery pack and internal voltage generation circuit
US20100301674A1 (en) Control circuit and electronic device including the same
US20120057259A1 (en) Controller with battery recharge protective function
CN101902055B (en) Power control circuit and battery module comprising same
KR20150107032A (en) Battery pack
CN111817388A (en) Charging circuit and electronic device
CN111884303B (en) Charging control circuit, charging control method and electronic device
CN214280960U (en) Charging circuit and electronic device
CN113937837A (en) Charging circuit and electronic device
CN117134440A (en) Battery protection circuit, battery protection board and electronic equipment
US20150207346A1 (en) Additional battery pack
CN203014115U (en) Mobile equipment adapter
CN109193878A (en) Charging circuit, charging method, electronic equipment and storage medium
CN105162078B (en) The charge protector and method and terminal of a kind of terminal
CN101900994A (en) Control circuit and electronic device comprising same
CN114421446A (en) Outdoor equipment power supply control method, power supply control system and outdoor equipment
CN105827010A (en) Audio equipment power supply system
CN219181211U (en) Electronic equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination