CN111327097B - Charging circuit and electronic equipment - Google Patents
Charging circuit and electronic equipment Download PDFInfo
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- CN111327097B CN111327097B CN202010157894.0A CN202010157894A CN111327097B CN 111327097 B CN111327097 B CN 111327097B CN 202010157894 A CN202010157894 A CN 202010157894A CN 111327097 B CN111327097 B CN 111327097B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
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- 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 present disclosure relates to a charging circuit and an electronic device, the charging circuit comprising: the first protection sub-circuit is respectively connected with two poles of the first battery cell, the first protection sub-circuit comprises a first switch sub-circuit, a first protection chip and a first current detection resistor, the first switch sub-circuit, the first current detection resistor and the first battery cell are connected in series, the first protection chip is respectively connected with the first switch sub-circuit and the first current detection resistor, and the first protection chip is used for controlling the first switch sub-circuit according to the voltage and the current of the first battery cell; the power management sub-circuit is connected with the first battery core and the second battery core respectively and is used for providing electric energy for the first battery core and the second battery core and determining current output by the power management sub-circuit.
Description
Technical Field
The disclosure relates to the technical field of electronic equipment, in particular to a charging circuit and electronic equipment.
Background
With the development and progress of technology, a battery with a dual-cell structure is provided in some electronic products. For example, in a folding screen mobile phone, two battery cells are usually arranged in parallel, and in the charging process, the charging current of each battery cell is different due to different on-resistances of each battery cell.
Currently, in order to control the charging of each battery cell, a load switch is often arranged on a charging circuit of each battery cell to control the charging of the battery cell. The charging of each battery cell is controlled through the load switch, so that the cost is high.
It should be noted that the information disclosed in the above background section is only for enhancing 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
An object of the present disclosure is to provide a charging circuit and an electronic device, thereby reducing the cost of the electronic device to at least some extent.
According to a first aspect of the present disclosure, there is provided a charging circuit for an electronic device including a first cell and a second cell connected in parallel, the charging circuit comprising:
the first protection sub-circuit is respectively connected with two poles of the first battery cell, the first switch sub-circuit, the first protection chip and the first current detection resistor of the first protection sub-circuit are connected in series, the first switch sub-circuit, the first current detection resistor and the first battery cell are respectively connected with the first switch sub-circuit and the first current detection resistor, and the first protection chip is used for controlling the first switch sub-circuit according to the voltage and the current of the first battery cell;
and the power management sub-circuit is respectively connected with the first battery cell and the second battery cell, and is used for providing electric energy for the first battery cell and the second battery cell and determining the current output by the power management sub-circuit.
According to a second aspect of the present disclosure, there is provided an electronic device comprising the charging circuit described above.
According to the charging circuit provided by the embodiment of the disclosure, the first current detection resistor is integrated in the first protection circuit, the charging current of the first battery cell is detected through the first protection chip and the first current detection resistor, the on-off of the first switch sub-circuit is controlled to control the charging of the first battery cell, and the charging current of the second battery cell is determined according to the charging current of the first battery cell and the current output by the power management sub-circuit so as to control the charging of the second battery cell, so that the problem of high cost of the electronic equipment caused by adopting the load switch in the related art is solved, the cost of the electronic equipment is reduced, and further, the space on the circuit board is saved through the integrated first protection circuit, and the light and thin electronic equipment is facilitated.
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 diagram of a first charging circuit provided in an exemplary embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a second charging circuit provided in an exemplary embodiment of the present disclosure;
fig. 3 is a schematic diagram of a third charging circuit provided in an exemplary embodiment of the present disclosure.
In the figure: 110. a first cell; 120. a first protection subcircuit; 121. a first protection chip; 122. a first switch sub-circuit; 123. a first current detecting resistor; 130. a second protection subcircuit; 131. a second protection chip; 132. a second switch sub-circuit; 210. a second cell; 220. a third protection subcircuit; 221. a third protection chip; 222. a third switching sub-circuit; 223. a third current detecting resistor; 230. a fourth protection sub-circuit; 310. a power management sub-circuit; 320. a second current detecting resistor; 311. a second voltage detection module; 312. a second current detection module; 410. a flexible circuit board.
T1, a first transistor; t2, a second transistor; t5, fifth transistor; t6, sixth transistor.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many 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 the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, 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 disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, materials, devices, steps, etc. 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 depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, or in one or more software-hardened modules, or in different networks and/or processor devices and/or microcontroller devices.
The embodiment of the disclosure first provides a charging circuit for an electronic device, as shown in fig. 1, where the electronic device includes a first battery cell 110 and a second battery cell 210 connected in parallel, the charging circuit includes a first protection sub-circuit 120 and a power management sub-circuit 310, and the first protection sub-circuit 120 is respectively connected with two poles of the first battery cell 110. As shown in fig. 2, the first protection sub-circuit 120 includes a first switch sub-circuit 122, a first protection chip 121, and a first current detection resistor 123, the first switch sub-circuit 122, the first current detection resistor 123, and the first battery cell 110 are connected in series, the first protection chip 121 is respectively connected to the first switch sub-circuit 122 and the first current detection resistor 123, and the first protection chip 121 is used for controlling the first switch sub-circuit 122 according to the voltage and the current of the first battery cell 110; the power management sub-circuit 310 is connected to the first battery cell 110 and the second battery cell 210, respectively, and is configured to provide power to the first battery cell 110 and the second battery cell 210 and determine a current output by the power management sub-circuit 310.
According to the charging circuit provided by the embodiment of the disclosure, the first current detection resistor 123 is integrated in the first protection circuit, the charging current of the first battery cell 110 is detected through the first protection chip 121 and the first current detection resistor 123, so that the on-off of the first switch sub-circuit 122 is controlled to control the charging of the first battery cell 110, and the charging current of the second battery cell 210 is determined according to the charging current of the first battery cell 110 and the current output by the power management sub-circuit 310 so as to control the charging of the second battery cell 210, so that the problem of high cost of electronic equipment caused by adopting a load switch in the related art is solved, the cost of the electronic equipment is reduced, and further, the space on a circuit board is saved through the integrated first protection circuit, and the light and thin electronic equipment is facilitated.
Further, the charging circuit according to the embodiment of the present disclosure may further include: a second protection sub-circuit 130, a third protection sub-circuit 220, and a fourth protection sub-circuit 230; the second protection subcircuit 130 is respectively connected with two poles of the first battery cell 110; the third protection sub-circuit 220 is respectively connected with two poles of the second battery cell 210; the fourth protection sub-circuit 230 is connected to two poles of the second battery cell 210, respectively.
The first protection sub-circuit 120 may be a first-stage protection circuit of the first battery cell 110, the second protection sub-circuit 130 may be a second-stage protection sub-circuit of the first battery cell 110, the third protection sub-circuit 220 is a first-stage protection sub-circuit of the second battery cell 210, and the fourth protection sub-circuit 230 is a second-stage protection sub-circuit of the second battery cell 210. Of course, the first protection sub-circuit 120 may be a second protection sub-circuit of the first battery cell 110, the second protection sub-circuit 130 may be a first protection sub-circuit of the first battery cell 110, the third protection sub-circuit 220 is a second protection sub-circuit of the second battery cell 210, and the fourth protection sub-circuit 230 is a first protection sub-circuit of the second battery cell 210, which is not limited in this embodiment of the disclosure.
The following will describe each part of the charging circuit provided in the embodiment of the present disclosure in detail:
the first protection sub-circuit 120 may be a first-stage protection sub-circuit of the first battery cell 110, that is, an overvoltage protection sub-circuit of the first battery cell 110. The first cell 110 may be a primary cell, and the second cell 210 may be a secondary cell, with the path impedance of the first cell 110 being less than that of the second cell 210. Of course, in practical applications, the first battery cell 110 may be a secondary battery cell, and the second battery cell 210 may be a primary battery cell, which is not specifically limited in the embodiments of the present disclosure.
The first protection sub-circuit 120 may include a first switch sub-circuit 122, a first protection chip 121, and a first current detection resistor 123, where the first switch sub-circuit 122, the first current detection resistor 123, and the first battery cell 110 are connected in series, and the first protection chip 121 is connected to the first switch sub-circuit 122 and the first current detection resistor 123, and the first protection chip 121 is used to control the first switch sub-circuit 122 according to the voltage and the current of the first battery cell 110.
The first protection chip 121 is connected to two poles of the first battery cell 110, so as to detect the voltage of the two poles of the first battery cell 110. The first switching sub-circuit 122 includes a first transistor T1 and a second transistor T2, the first transistor T1 and the second transistor T2 are connected in series with the first cell 110, and a control terminal of the first transistor T1 is connected to the first protection chip 121 to receive the first control signal, and a control terminal of the second transistor T2 is connected to the first protection chip 121 to receive the second control signal.
For example, one end of the first protection chip 121 is connected to the positive electrode of the first battery cell 110, and the other end of the first protection chip 121 is connected to the negative electrode of the first battery cell 110. The first end of the first transistor T1 is connected to the negative electrode of the first battery cell 110, the second end of the first transistor T1 is connected to the first end of the second transistor T2, and the control end of the first transistor T1 is connected to the first protection chip 121. The second end of the second transistor T2 is connected to the ground, and the control end of the second transistor T2 is connected to the first protection chip 121.
The first protection chip 121 may include a first current detection module and a first current limiting module, and the first current detection module is connected to the first current detection resistor 123 for detecting a current of the first current detection resistor 123. The first current detection module may determine the charging current by detecting the voltage across the first current detection resistor 123 and then determining the charging current according to the resistance value of the first current detection resistor 123. The first current detection module may also be used to detect a voltage across the first cell 110. The first current limiting module is connected to the first current detecting module and the first switch sub-circuit 122, and is configured to control the first battery cell 110 to charge with a first threshold current when the current of the first current detecting resistor 123 is greater than the first threshold.
The second protection sub-circuit 130 may include a second protection chip 131 and a second switching sub-circuit 132, two ends of the second protection chip 131 are respectively connected to two poles of the first battery cell 110, and the second switching sub-circuit 132 includes a third transistor and a fourth transistor. The third transistor and the fourth transistor are connected in series with the first cell 110, and a control terminal of the third transistor is connected to the second protection chip 131 to receive the third control signal, and a control terminal of the fourth transistor is connected to the second protection chip 131 to receive the fourth control signal.
For example, one end of the second protection chip 131 is connected to the positive electrode of the first battery cell 110, and the other end of the second protection chip 131 is connected to the negative electrode of the first battery cell 110. The first end of the third transistor is connected to the negative electrode of the first battery cell 110, the second end of the third transistor is connected to the first end of the fourth transistor, and the control end of the third transistor is connected to the second protection chip 131. The second end of the fourth transistor is connected to the ground, and the control end of the fourth transistor is connected to the second protection chip 131.
The third protection sub-circuit 220 may include a third protection chip 221 and a third switching sub-circuit 222, two ends of the third protection chip 221 are respectively connected to two poles of the second battery cell 210, and the third switching sub-circuit 222 includes a fifth transistor T5 and a sixth transistor. The fifth transistor T5 and the sixth transistor are connected in series with the second cell 210, and a control terminal of the fifth transistor T5 is connected to the third protection chip 221 to receive the fifth control signal, and a control terminal of the fourth transistor is connected to the third protection chip 221 to receive the sixth control signal.
For example, one end of the third protection chip 221 is connected to the positive electrode of the second battery cell 210, and the other end of the third protection chip 221 is connected to the negative electrode of the second battery cell 210. The first end of the fifth transistor T5 is connected to the negative electrode of the second battery cell 210, the second end of the fifth transistor T5 is connected to the first end of the sixth transistor, and the control end of the fifth transistor T5 is connected to the third protection chip 221. The second terminal of the sixth transistor is connected to the ground terminal, and the control terminal of the sixth transistor is connected to the third protection chip 221.
The fourth protection sub-circuit 230 may include a fourth protection chip and a fourth switching sub-circuit, wherein two ends of the fourth protection chip are respectively connected to two poles of the second battery cell 210, and the fourth switching sub-circuit includes a seventh transistor and an eighth transistor. The seventh transistor and the eighth transistor are connected in series with the second cell 210, and a control terminal of the seventh transistor is connected to the fourth protection chip to receive the seventh control signal, and a control terminal of the fourth transistor is connected to the fourth protection chip to receive the eighth control signal.
For example, one end of the fourth protection chip is connected to the positive electrode of the second battery cell 210, and the other end of the fourth protection chip is connected to the negative electrode of the second battery cell 210. The first end of the seventh transistor is connected to the negative electrode of the second battery cell 210, the second end of the seventh transistor is connected to the first end of the eighth transistor, and the control end of the seventh transistor is connected to the fourth protection chip. The second end of the eighth transistor is connected with the grounding end, and the control end of the eighth transistor is connected with the fourth protection chip.
Alternatively, the current detecting function and the current limiting function may be integrated in the third protection sub-circuit 220, thereby detecting the current of the second battery cell 210. On this basis, as shown in fig. 3, the third protection sub-circuit 220 may include: the third switch sub-circuit 222, the third protection chip 221 and the third current detecting resistor 223, the third switch sub-circuit 222, the third current detecting resistor 223 and the second electric core 210 are connected in series, the third protection chip 221 is respectively connected with the third switch sub-circuit 222 and the third current detecting resistor 223, and the third protection chip 221 is used for controlling the third switch sub-circuit 222 according to the voltage and the current of the second electric core 210.
The third protection chip 221 is connected to two poles of the second battery cell 210, respectively, to detect a voltage of the two poles of the second battery cell 210. The third switching sub-circuit 222 includes a fifth transistor T5 and a sixth transistor T6, the fifth transistor T5 and the sixth transistor T6 are connected in series with the second cell 210, and a control terminal of the fifth transistor T5 is connected to the third protection chip 221 to receive the fifth control signal, and a control terminal of the sixth transistor T6 and the second protection chip 131 to receive the sixth control signal.
For example, one end of the third protection chip 221 is connected to the positive electrode of the second battery cell 210, and the other end of the third protection chip 221 is connected to the negative electrode of the second battery cell 210. The first end of the fifth transistor T5 is connected to the negative electrode of the second battery cell 210, the second end of the fifth transistor T5 is connected to the first end of the sixth transistor T6, and the control end of the fifth transistor T5 is connected to the second protection chip 131. The second end of the sixth transistor T6 is connected to the ground, and the control end of the sixth transistor T6 is connected to the second protection chip 131.
The third protection chip 221 may include a third current detection module and a third current limiting module, where the third current detection module is connected to the third current detection resistor 223 and is configured to detect a current of the third current detection resistor 223, that is, a charging current of the second battery cell 210. The third current detection module may determine the charging current by detecting the voltage across the third current detection resistor 223 and then according to the resistance value of the third current detection resistor 223. The third current detection module may also be used to detect the voltage across the second cell 210. The third current limiting module is connected to the third current detecting module and the third switch sub-circuit 222, and is configured to control the second battery cell 210 to charge with the second threshold current when the current of the third current detecting resistor 223 is greater than the second threshold.
It should be noted that in this exemplary embodiment, each transistor has a control terminal, a first terminal, and a second terminal. Specifically, the control end of each transistor may be a gate, the first end may be a source, and the second end may be a drain; alternatively, the control terminal of each transistor may be a gate, the first terminal may be a drain, and the second terminal may be a source. In addition, each transistor may be an enhancement transistor or a depletion transistor, which is not particularly limited in this exemplary embodiment.
In the above specific embodiment, all the transistors are N-type transistors; those skilled in the art will readily be able to derive pixel drive circuits having all transistors that are P-type transistors from the pixel drive circuits provided in the present disclosure. The adoption of the full P-type thin film transistor has the following advantages: such as strong noise suppression; for example, the low level is on, and the low level in the charge management is easy to realize; for example, the P-type thin film transistor is simple to manufacture and relatively low in price; such as better stability of P-type thin film transistors, etc. Of course, the pixel driving circuit provided in the present disclosure may be changed to a CMOS (Complementary Metal Oxide Semiconductor ) circuit or the like, and is not limited to the charging circuit provided in the present embodiment, and will not be described here again.
The first protection chip 121 in the first protection sub-circuit 120 may be connected to a controller (such as an MCU) in the electronic device, where the first protection chip 121 sends the charging current of the first battery cell 110 to the controller, and the controller determines the charging current of the second battery cell 210 according to the total current input by the power management sub-circuit 310 and the charging current of the first battery cell 110. And further controls and adjusts the charging strategy according to the charging current of the first battery cell 110 and the charging current of the second battery cell 210.
When the first protection sub-circuit 120 and the third protection sub-circuit 220 are integrated with the current detection and current limiting functions, the first protection sub-circuit 120 and the third protection sub-circuit 220 can be connected to the controller, the first protection sub-circuit 120 sends the charging current of the first battery cell 110 to the controller, and the third protection sub-circuit 220 sends the charging current of the second battery cell 210 to the controller.
The connection manner between the first protection chip 121 and the third protection chip 221 and the controller may be wired connection or wireless connection, which is not particularly limited in the embodiment of the present disclosure.
Further, in order to detect the current output by the power management circuit, the charging circuit further includes: the second current detecting resistor 320 is connected to the output end of the power management sub-circuit 310; the power management sub-circuit 310 includes a second current detection module 312 and a second voltage detection module 311, where the second current detection module 312 is connected to the second current detection resistor 320, and is configured to detect a current output by the power management sub-circuit 310. The two ends of the second voltage detection module 311 may be connected to the output terminal of the power management sub-circuit 310 and the ground terminal, for detecting the voltage output by the power management sub-circuit 310.
The power management sub-circuit 310 is used in the electronic device to supply power to the battery of the electronic device, to supply power to other modules, and so on. And a battery temperature sensing ADC is integrated in the power management sub-circuit 310.
According to the charging circuit provided by the embodiment of the disclosure, the first current detection resistor 123 is integrated in the first protection circuit, the charging current of the first battery cell 110 is detected through the first protection chip 121 and the first current detection resistor 123, so that the on-off of the first switch sub-circuit 122 is controlled to control the charging of the first battery cell 110, and the charging current of the second battery cell 210 is determined according to the charging current of the first battery cell 110 and the current output by the power management sub-circuit 310 so as to control the charging of the second battery cell 210, so that the problem of high cost of electronic equipment caused by adopting a load switch in the related art is solved, the cost of the electronic equipment is reduced, and further, the space on a circuit board is saved through the integrated first protection circuit, and the light and thin electronic equipment is facilitated. And the maximum speed charging of the double battery cells and the current limiting function of the single battery cell are realized, the auxiliary battery cells are fully charged, and the charging capacity loss is reduced.
The exemplary embodiments of the present disclosure also provide an electronic device including the above charging circuit. Wherein the electronic device is a folding screen electronic device, and a flexible circuit board 410 is disposed between the second battery cell 210 and the power management sub-circuit 310.
Further, the electronic device may further include a controller, where the controller is connected to the first protection chip 121, and is configured to obtain a charging current of the first battery cell 110, and control charging according to the charging current of the first battery cell 110.
The first protection chip 121 in the first protection sub-circuit 120 may be connected to a controller (such as an MCU) in the electronic device, where the first protection chip 121 sends the charging current of the first battery cell 110 to the controller, and the controller determines the charging current of the second battery cell 210 according to the total current input by the power management sub-circuit 310 and the charging current of the first battery cell 110. And further controls and adjusts the charging strategy according to the charging current of the first battery cell 110 and the charging current of the second battery cell 210.
When the first protection sub-circuit 120 and the third protection sub-circuit 220 are integrated with the current detection and current limiting functions, the first protection sub-circuit 120 and the third protection sub-circuit 220 can be connected to the controller, the first protection sub-circuit 120 sends the charging current of the first battery cell 110 to the controller, and the third protection sub-circuit 220 sends the charging current of the second battery cell 210 to the controller.
The connection manner between the first protection chip 121 and the third protection chip 221 and the controller may be wired connection or wireless connection, which is not particularly limited in the embodiment of the present disclosure.
The electronic device in the embodiment of the disclosure may be an electronic device that needs to be charged, such as a mobile phone, a tablet computer, a vehicle-mounted computer, an electronic reader, a smart television, or a navigator.
The following description uses an electronic device as an example of a folding screen mobile phone, and the folding screen mobile phone further includes a display screen, a frame, a main board, and a rear cover. The display screen can be a flexible display device and is arranged on the frame to form a display surface of the electronic equipment, and the display screen is used as a front shell of the electronic equipment. The frame may be a flexible frame or a foldable frame. For example by a hinged first back cover and a second back cover. The back cover is adhered to the frame through double faced adhesive tape, and the display screen, the frame and the back cover form an accommodating space for accommodating other electronic elements or functional modules of the electronic equipment. Meanwhile, the display screen forms a display surface of the electronic device and is used for displaying information such as images, texts and the like. The display screen may be a liquid crystal display (Liquid Crystal Display, LCD) or an organic light-Emitting Diode (OLED) display screen or the like.
A flexible cover plate may be provided on the display screen. The flexible cover plate can cover the display screen to protect the display screen and prevent the display screen from being scratched or damaged by water.
The display screen may include a display area and a non-display area. The display area performs a display function of a display screen and is used for displaying information such as images and texts. The non-display area does not display information. The non-display area may be used to provide functional modules such as cameras, receivers, proximity sensors, etc. 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 screen. At this time, the display screen can display information in full screen, so that the electronic device has a larger screen duty ratio. The display screen includes only a display area and does not include a non-display area. At this time, functional modules such as a camera and a proximity sensor in the electronic device may be hidden under the display screen, and a fingerprint identification module of the electronic device may be disposed on the back of the electronic device.
The flexible display screen can comprise a flexible area and a rigid area, wherein the flexible area is arranged between the two rigid areas, and the flexible area can be bent. The first cell is located below the first rigid region, and the second cell is located below the second rigid region.
The frame may be a hollow frame structure. Wherein, the frame material can include metal or plastic. The main board is arranged in the accommodating space. For example, the motherboard may be mounted on the frame and stored in the storage space together with the frame. The mainboard is provided with a grounding point so as to realize the grounding of the mainboard. One or more of the functional modules of the motor, microphone, speaker, receiver, earphone interface, universal serial bus interface (USB interface), camera, proximity sensor, ambient light sensor, gyroscope, and processor may be integrated on the motherboard. Meanwhile, the display screen may be electrically connected to the main board.
The motherboard may include a first motherboard under which the first battery cell 110 is disposed and a second motherboard. The second electric core 210 is disposed under the second main board, the charging circuit of the first electric core 110 is disposed on the first main board, and the charging circuit of the second electric core 210 is disposed on the second main board. The first main board and the second main board are respectively provided with a display control circuit. The display control circuit outputs an electrical signal to the display screen to control the display screen to display information. A flexible circuit board 410 is disposed between the first motherboard and the second motherboard.
The first main board may be a main circuit board, and the processor, the storage device, the network adapter, and the like of the mobile phone are disposed on the first circuit board. The second main board is a secondary circuit board and is used for driving the display drive of the secondary screen.
The rear cover is used to form an outer contour of the electronic device. The rear cover may be integrally formed. In the forming process of the rear cover, a rear camera hole, a fingerprint identification module mounting hole and other structures can be formed on the rear cover.
According to the electronic device provided by the embodiment of the disclosure, the first current detection resistor 123 is integrated in the first protection circuit, the charging current of the first battery cell 110 is detected through the first protection chip 121 and the first current detection resistor 123, so that the on-off of the first switch sub-circuit 122 is controlled to control the charging of the first battery cell 110, and the charging current of the second battery cell 210 is determined according to the charging current of the first battery cell 110 and the current output by the power management sub-circuit 310 so as to control the charging of the second battery cell 210, so that the problem of high cost of the electronic device caused by adopting a load switch in the related art is solved, the cost of the electronic device is reduced, and further, the space on a circuit board is saved through the integrated first protection circuit, and the light and thin electronic device is facilitated. And the maximum speed charging of the double battery cells and the current limiting function of the single battery cell are realized, the auxiliary battery cells are fully charged, and the charging capacity loss is reduced.
Those skilled in the art will appreciate that the various aspects of the present disclosure may be implemented as a system, method, or program product. Accordingly, various aspects of the disclosure may be embodied in the following forms, namely: an entirely hardware embodiment, an entirely software embodiment (including firmware, micro-code, etc.) or an embodiment combining hardware and software aspects may be referred to herein as a "circuit," module "or" system.
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 adaptations, 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 is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (12)
1. A charging circuit for an electronic device, the electronic device including a first cell and a second cell connected in parallel, the charging circuit comprising:
the first protection sub-circuit is connected with two poles of the first battery cell respectively, the first protection sub-circuit comprises a first switch sub-circuit, a first protection chip and a first current detection resistor, the first switch sub-circuit, the first current detection resistor and the first battery cell are connected in series, the first protection chip is connected with the first switch sub-circuit and the first current detection resistor respectively, and the first protection chip is used for controlling the first switch sub-circuit according to the voltage and the current of the first battery cell;
the second protection sub-circuit is respectively connected with two poles of the first battery cell, the second protection sub-circuit comprises a second protection chip and a second switch sub-circuit, two ends of the second protection chip are respectively connected with two poles of the first battery cell, and the second switch sub-circuit, the first current detection resistor and the first battery cell are connected in series;
the power management sub-circuit is connected with the first battery cell and the second battery cell respectively, and is used for providing electric energy for the first battery cell and the second battery cell and determining current output by the power management sub-circuit;
wherein, the first protection chip includes:
the first current detection module is connected with the first current detection resistor and is used for detecting the current of the first current detection resistor;
the first current limiting module is connected with the first current detection module and the first switch sub-circuit and used for controlling the first battery cell to charge with a first threshold current when the current of the first current detection resistor is larger than a first threshold.
2. The charging circuit of claim 1, wherein the first protection chip is respectively connected to two poles of the first battery cell to detect a voltage of the two poles of the first battery cell.
3. The charging circuit of claim 1, wherein the first switching sub-circuit comprises:
a first transistor;
and the control end of the second transistor is connected with the first protection chip so as to receive a second control signal.
4. The charging circuit of claim 1, wherein the charging circuit further comprises:
the second current detection resistor is connected with the output end of the power management sub-circuit;
the power management sub-circuit includes
And the second current detection module is connected with the second current detection resistor and is used for detecting the current output by the power management sub-circuit.
5. The charging circuit of claim 4, wherein the power management sub-circuit further comprises:
and the second voltage detection module is used for detecting the voltage output by the power management sub-circuit.
6. The charging circuit of claim 1, wherein the charging circuit further comprises:
the third protection subcircuit is respectively connected with two poles of the second battery cell;
and the fourth protection subcircuit is respectively connected with two poles of the second battery cell.
7. The charging circuit of claim 6, wherein the third protection sub-circuit comprises a third switching sub-circuit, a third protection chip and a third current detection resistor, the third switching sub-circuit and the third current detection resistor are connected in series with the second battery cell, the third protection chip is respectively connected with the third switching sub-circuit and the third current detection resistor, and the third protection chip is used for controlling the third switching sub-circuit according to the voltage and the current of the second battery cell.
8. The charging circuit of claim 7, wherein the third protection chip comprises:
the third current detection module is connected with the third current detection resistor and is used for detecting the current of the third current detection resistor;
and the third current limiting module is connected with the third current detection module and the third switch sub-circuit and is used for controlling the second battery cell to charge with a second threshold current when the current of the third current detection resistor is larger than the second threshold.
9. An electronic device, characterized in that it comprises a charging circuit according to any one of claims 1-8.
10. The electronic device of claim 9, wherein the electronic device is a folding screen electronic device, and a flexible circuit board is disposed between the second battery cell and the power management sub-circuit.
11. The electronic device of claim 10, wherein a path impedance of the second cell is greater than a path impedance of the first cell.
12. The electronic device of claim 9, wherein the electronic device further comprises:
and the controller is connected with the first protection chip and is used for acquiring the charging current of the first battery cell and controlling the charging according to the charging current of the first battery cell.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010157894.0A CN111327097B (en) | 2020-03-09 | 2020-03-09 | Charging circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010157894.0A CN111327097B (en) | 2020-03-09 | 2020-03-09 | Charging circuit and electronic equipment |
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| CN111327097B true CN111327097B (en) | 2023-08-08 |
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| Publication number | Publication date |
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| CN111327097A (en) | 2020-06-23 |
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