CN110474391B - Charging circuit and electronic device - Google Patents
Charging circuit and electronic device Download PDFInfo
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- CN110474391B CN110474391B CN201910732696.XA CN201910732696A CN110474391B CN 110474391 B CN110474391 B CN 110474391B CN 201910732696 A CN201910732696 A CN 201910732696A CN 110474391 B CN110474391 B CN 110474391B
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- circuit board
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- 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
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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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
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- Chemical & Material Sciences (AREA)
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
本发明涉及一种充电电路及电子设备。其中，充电电路包括充电接口、第一电路板、第二电路板、电池保护电路板以及控制电路，第一电路板和电池保护电路板之间形成第一充电通路，第一电路板、第二电路板及电池保护电路板之间形成第二充电通路。控制电路在充电接口与外部电源连接时，控制第一充电通路以及第二充电通路导通，使得充电电压和电流同时经由第一充电通路和第二充电通路为电池充电，从而充电电路采用分流的方式充电，整体的通路阻抗进一步地降低，整体功耗得到优化，降低大电流工作状态下的风险和损耗，提高安全性和可靠性。
The invention relates to a charging circuit and electronic equipment. The charging circuit includes a charging interface, a first circuit board, a second circuit board, a battery protection circuit board and a control circuit. A first charging path is formed between the first circuit board and the battery protection circuit board. A second charging path is formed between the circuit board and the battery protection circuit board. When the charging interface is connected to the external power supply, the control circuit controls the conduction of the first charging path and the second charging path, so that the charging voltage and current simultaneously charge the battery through the first charging path and the second charging path, so that the charging circuit adopts a shunt. The overall path impedance is further reduced, the overall power consumption is optimized, the risk and loss under high current working conditions are reduced, and the safety and reliability are improved.
Description
Technical Field
The application relates to the technical field of intelligent terminals, in particular to a charging circuit and electronic equipment.
Background
With the development of electronic device technologies such as mobile phones and tablet computers, the frequency of using electronic devices by users is higher and higher. In order to improve the portability of the electronic device, a battery is usually arranged in the electronic device, and the normal operation of the device can be ensured only by charging the battery in time.
However, in an exemplary electronic device, a charging path is long, a path impedance is generally high, and a charging path of a battery is single, when a large current is required for charging, if the impedance cannot be reduced, internal loss will be greatly increased, which causes heat generation of the whole device, affects user experience, and has a potential safety risk.
Disclosure of Invention
The embodiment of the application provides a charging circuit and electronic equipment, which can reduce the path impedance, optimize the charging power consumption of the whole machine and improve the safety and reliability.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
a charging circuit applied to an electronic device, the charging circuit comprising:
the charging interface is used for being connected with an external power supply and receiving charging voltage and current provided by the external power supply;
the first circuit board is connected with the charging interface;
the second circuit board is connected with the first circuit board;
the battery protection circuit board is respectively connected with the first circuit board, the second circuit board and the battery;
the control circuit is used for controlling the conduction of a first charging path between the first circuit board and the battery protection circuit board and controlling the conduction of a second charging path between the first circuit board, the second circuit board and the battery protection circuit board when the charging interface is connected with the external power supply, so that the charging voltage and the charging current charge the battery through the first charging path and the second charging path simultaneously.
An electronic device comprises the charging circuit and the battery.
The charging circuit is connected with a battery and comprises a charging interface, a first circuit board, a second circuit board, a battery protection circuit board and a control circuit, wherein a first charging path is formed between the first circuit board and the battery protection circuit board, and a second charging path is formed between the first circuit board, the second circuit board and the battery protection circuit board. When the charging interface is connected with an external power supply, the control circuit controls the first charging path and the second charging path to be conducted, so that charging voltage and charging current are charged for the battery through the first charging path and the second charging path simultaneously, the charging circuit adopts a shunting mode to charge, the overall path impedance is further reduced, the overall power consumption is optimized, the risk and the loss under a large-current working state are reduced, and the safety and the reliability are improved.
The electronic equipment comprises the charging circuit and the battery, and the charging circuit can reduce the path impedance and reduce the risk and loss in a high-current working state, so that the path of high current can be optimized and the temperature rise of the whole electronic equipment is optimized in the application process of the electronic equipment, and the electronic equipment has high safety and reliability.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of a charging circuit in one embodiment;
FIGS. 1 a-1 c are block diagrams of charging circuits in different embodiments;
FIG. 2 is a schematic diagram illustrating the internal structure and location of a charging circuit according to an embodiment;
FIG. 3 is a schematic diagram illustrating the internal structure and location of a charging circuit according to an embodiment;
FIGS. 4 a-4 c are schematic views illustrating the position of the first protection plate in different embodiments;
fig. 5 a-5 c are schematic views of the positions of the second protection plate in different embodiments;
FIG. 6 is a schematic diagram illustrating the internal structure and location of a charging circuit according to an embodiment;
FIG. 7 is a schematic diagram illustrating the internal structure and location of a charging circuit according to an embodiment;
FIG. 8 is a schematic diagram illustrating the internal structure and location of a charging circuit according to an embodiment;
FIG. 9 is a schematic diagram illustrating the internal structure and location of a charging circuit according to an embodiment;
fig. 10 is a schematic diagram illustrating an internal structure of the charging circuit according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first client may be referred to as a second client, and similarly, a second client may be referred to as a first client, without departing from the scope of the present application. Both the first client and the second client are clients, but they are not the same client.
It is to be understood that the terms "left," "right," "upper," "lower," and the like as used herein, are used in the sense of indicating an orientation or positional relationship based on that shown in the drawings for the purpose of describing the present application and simplifying the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Fig. 1 is a block diagram of a charging circuit according to an embodiment.
In this embodiment, the charging circuit 1 is applied to an electronic device, and includes a charging interface (not shown in the figure, the charging interface may be disposed on the first circuit board 10 or disposed at another position), a first circuit board 10, a second circuit board 20, a battery protection circuit board 30, and a control circuit 50 (not shown in the figure, the control circuit 50 may be disposed on the first circuit board 10, the second circuit board 20, or disposed at another position).
The charging interface is connected to the first circuit board 10, and is configured to be connected to an external power source when the battery 40 needs to be charged, and receive charging voltage and current provided by the external power source. When the charging interface is connected to an external charger or an external power adapter, the charging voltage and current supplied from the external power supply charge the battery 40 through the first circuit board 10. Optionally, the charging interface includes a USB charging interface, and the USB charging interface is connected to an external charger or an external power adapter through a data line. It should be noted that the function of the charging interface is not limited to the connection with an external charger or an external power adapter, and may have other functions according to the specific application environment of the charging circuit 1.
Wherein the second circuit board 20 is connected with the first circuit board 10. When the charging interface is connected to an external charger or an external power adapter, the external power can charge the battery 40 through the first circuit board 10 and the second circuit board 20. In the practical application of the charging circuit 1, the second circuit board 20 may be a motherboard of an application product, and a plurality of functional modules are provided according to a specific application environment, so as to implement multiple functions, for example, when the charging circuit is applied to a mobile phone product, the second circuit board 20 may be provided with a charging management module, a wireless communication module, a central processing unit, and the like. Wherein, when the second circuit board 20 is provided with the functional module, power is supplied through the battery 40.
The battery protection circuit board 30 is connected to the first circuit board 10, the second circuit board 20, and the battery 40. The battery protection circuit board 30 is an integrated circuit board that has a protection function and a charging and discharging function for the battery 40, and includes an integrated circuit and other auxiliary devices that are arranged according to actual needs. The battery 40 inputs an external power through the battery protection circuit board 30 or supplies power to the functional modules on the second circuit board 20. Alternatively, the battery protection circuit board 30 and the battery 40 are electrically connected by soldering, and the conductive sheet of the battery protection circuit board 30 and the conductive sheet of the battery 40 are connected by soldering.
The control circuit 50 is configured to control a first charging path a between the first circuit board 10 and the battery protection circuit board 30 to be conducted and control a second charging path b between the first circuit board 10, the second circuit board 20, and the battery protection circuit board 30 to be conducted when the charging interface is connected to an external power source, so that the battery 40 is charged by the charging voltage and the charging current through the first charging path a and the second charging path b at the same time.
In the charging circuit commonly used in the electronic device at present, a charging interface is usually arranged on a first circuit board, a battery is arranged between the first circuit board and a second circuit board, and the battery needs to charge a functional module of the second circuit board, so a battery protection circuit board is usually arranged on one side of the battery close to the second circuit board, so that a charging path of the battery is limited, and a charging current needs to pass through the charging interface of the first circuit board, the second circuit board and then the battery protection circuit board to charge the battery. In the present embodiment, due to the control of the control circuit 50, the charging circuit 1 has two charging paths, which are used for shunting charging, thereby reducing the path impedance and optimizing the charging power consumption.
Specifically, the first charging path a and the second charging path aThe overcurrent capabilities of the electrical paths b may be the same or different and may all charge the battery 40 directly. Alternatively, the second charging path b is a small current path and the first charging path a is a large current path, so that the charging circuit 1 has paths with different overcurrent capabilities. For example, when the maximum fast charging current of the charging circuit 1 is ImaxThe over-current capability of the second charging path b can be designed as I by path impedance designmax/2, designing the overcurrent capacity of the first charging path a as Imax。
In an embodiment, the control circuit 50 is further configured to obtain temperature information of the electronic device, and control the first charging path a to be conducted and the second charging path b to be conducted when the temperature information is within a preset range. In another embodiment, based on the foregoing embodiment, the control circuit 50 is further configured to control only the first charging path a to be conducted when the temperature information exceeds a preset range. The temperature information includes temperature information of the first circuit board 10, the second circuit board 20, and the battery 40, and the heat generation condition of the whole electronic device can be known according to the temperature information. The temperature value in the preset range can be set according to the actual situation.
The control circuit 50 sets a predetermined range according to the actual application. When the electronic device is in a standby state, the temperatures of the first circuit board 10 and the second circuit board 20 are both low, the control circuit 50 determines that the temperature information is within a preset range by acquiring the temperature information of the electronic device, and controls the first charging path a to be conducted and the second charging path b to be conducted, so that the charging is performed in a shunting manner. When the electronic device is in a high-power application, the temperature of the second circuit board 20 serving as the main board is high, even the heat is serious, the control circuit 50 judges that the temperature information exceeds a preset range, and only controls the first charging path a to be conducted, so that the temperature of the second circuit board 20 is prevented from being further increased due to high-current charging; meanwhile, the path is short, the path impedance is low, and the heat in the charging process is concentrated on the first circuit board 10, so that the overall temperature rise can be balanced, and the optimization is achieved.
It should be noted that, according to the setting condition of the preset range and the setting condition of the functional module of the first circuit board 10, the control circuit 50 may directly use the temperature information of the second circuit board 20 as the temperature information of the electronic device.
In one embodiment, the charging circuit further includes a switch component connected to the control circuit 50.
And the control circuit 50 is used for outputting a first signal when the temperature information is within a preset range and outputting a second signal when the temperature information exceeds the preset range.
Optionally, the control circuit 50 sets a preset temperature, and the temperature value within the preset range is smaller than the preset temperature, and the temperature value exceeding the preset range is greater than or equal to the preset temperature. When detecting that temperature information is less than preset temperature, the first signal is output to the switch module, when detecting that temperature information is greater than or equal to preset temperature, the second signal is output to the switch module to make the switch module switch on corresponding charging path according to the signal, with whole consumption reduction, optimize whole temperature rise, promote user experience.
Optionally, the control circuit 50 is disposed on the second circuit board 20, and includes a driving unit and a control unit, the driving unit is connected to the switch assembly and the control unit, the control unit detects a working temperature of the circuit, determines a scene (the scene includes a standby state and a high power consumption application state) according to the working temperature, adjusts a preset temperature value, compares the working temperature with the preset temperature, and controls the driving unit to output a first signal or a second signal to the switch assembly according to a comparison result. In an embodiment, the control Unit includes an MCU (Microcontroller Unit) and an AP (Application Processor), the MCU is connected to the driving Unit and the AP, the MCU can detect the operating temperature of the circuit and feed back the detected operating temperature to the AP, so that the AP can determine the scene according to the operating temperature, and adjust the preset temperature value and feed back the preset temperature value to the MCU, the MCU compares the operating temperature with the preset temperature, and controls the driving Unit to output the first signal or the second signal to the switch assembly according to the comparison result. The IO port of the AP has more resources, and when each path has a plurality of paths, the AP can perform multi-path control.
The switch component is connected to the control circuit 50, and is used for conducting the first charging path a and the second charging path b according to the first signal, and conducting only the first charging path according to the second signal. Therefore, when the switch component receives the first signal, the charging circuit 1 has two charging paths, and shunt charging is performed, so that the path impedance is reduced, and the charging power consumption is optimized; when the switch component receives the second signal, the charging circuit 1 uses the first charging path a as a charging path, and since the path is short, the path impedance can be reduced, and the charging loss can be optimized.
The switch assembly may be disposed on the first circuit board 10 or on both the first circuit board 10 and the second circuit board 20 without being limited to the position where the switch assembly is disposed. For example, the switching assembly may be a combination of the first switching device K1 and the second switching device K2 (see fig. 1a), or a combination of the first switching device K1 and the third switching device K3 (see fig. 1b), or a combination of the first switching device K1, the second switching device K2, and the third switching device K3 (see fig. 1 c).
Optionally, the switch assembly is disposed on the first circuit board 10, and according to the first signal, the first circuit board 10 is electrically connected to the battery protection circuit board 30 to make the first charging path a conductive, and simultaneously the first circuit board 10 is electrically connected to the second circuit board 20 to make the second charging path b conductive; the electrical connection between the first circuit board 10 and the second circuit board 20 is disconnected according to the second signal to disconnect the second charging path b, and the electrical connection between the first circuit board 10 and the battery protection circuit board 30 is conducted to conduct the first charging path a.
Optionally, the switch assembly is disposed on both the first circuit board 10 and the second circuit board 20, and conducts the electrical connection between the first circuit board 10 and the battery protection circuit board 30 according to the first signal to conduct the first charging path a, and conducts the electrical connection between the second circuit board 20 and the battery protection circuit board 30 to conduct the second charging path b; the electrical connection between the second circuit board 20 and the battery protection circuit board 30 is disconnected according to the second signal to disconnect the second charging path b, and the electrical connection between the first circuit board 10 and the battery protection circuit board 30 is conducted to conduct the first charging path a.
In the above embodiment, the battery protection circuit board 30 has a plurality of optional setting positions, which can be set according to actual situations, for example, according to the occupied area of the battery 40 in the actual application environment, the length of the path, and the like.
In one embodiment, the first circuit board 10, the battery 40, and the second circuit board 20 are arranged in a first direction, and the battery 40 and the battery protection circuit board 30 are arranged in a second direction, the first direction being perpendicular to the second direction.
Alternatively, referring to fig. 2, the battery protection circuit board 30 is disposed between the first circuit board 10 and the second circuit board 20, the battery protection circuit board 30 and the battery 40 are disposed side by side, and the charging path of the battery 40 includes a first charging path a (a solid line path in fig. 2, an arrow represents a current flow direction) and a second charging path b (a dotted line path in fig. 2, an arrow represents a current flow direction). By properly adjusting the width of the battery 40 in the second direction, the battery protection circuit board 30 and the battery 40 are both located in the middle area of the inner sides of the first circuit board 10 and the second circuit board 20, and the occupation of the external space area can be reduced. Meanwhile, the length of the battery 40 in the first direction may be adjusted according to the actual arrangement distance of the first circuit board 10 and the second circuit board 20, thereby ensuring that the capacity of the battery 40 is substantially unchanged.
Alternatively, referring to fig. 3, the battery protection circuit board 30 is disposed on the same side of the first circuit board 10, the battery 40 and the second circuit board 20, and the charging path of the battery 40 includes a first charging path a (solid line path in fig. 3, arrow represents current flowing direction) and a second charging path b (dotted line in fig. 3, arrow represents current flowing direction). The battery protection circuit board 30 is disposed outside the first circuit board 10, the battery 40, and the second circuit board 20 so that the battery protection circuit board 30 does not occupy a space area of the battery 40 and the capacity of the battery 40 remains unchanged.
Alternatively, in the above embodiment, the battery protection circuit board 30 has the elongated structure, and the length direction of the battery protection circuit board 30 is parallel to the first direction, so that the length of the battery protection circuit board 30 in the first direction can be adjusted to be close to the length of the battery 40, and the width of the battery protection circuit board in the second direction can be reduced to reduce the occupied space.
In another embodiment, the battery protection circuit board 30 includes a first protection plate 301 and a second protection plate 302. The first protection board 301 is an integrated circuit board that has a protection function and a charging function for the battery 40, and includes an integrated circuit and other auxiliary devices that are arranged according to actual needs; the second protection board 302 is an integrated circuit board for protecting the battery 40 and performing charging and discharging functions, and includes an integrated circuit and other auxiliary devices according to actual needs. By splitting the first protection plate 301 and the second protection plate 302, interference caused by charging in different charging paths on the same battery protection circuit board can be avoided; independent control of the charging and discharging of the battery 40 may also be achieved.
The first protection plate 301 is disposed at a side of the battery 40 close to the first circuit board 10 and electrically connected to the first circuit board 10, so that a path between the first circuit board 10 and the first protection plate 301 forms a first charging path. Referring to fig. 4a to 4c, the battery 40 disposed on the side close to the first circuit board 10 includes (only a part of the structure of the charging circuit 1 is shown in the figures, which is used to indicate the position relationship between the first protection plate 301 and the battery 40 and the first circuit board 10, and the following "left", "right" and "upper" are all referred to the orientation shown in the figures): one of on the left side of the first circuit board 10, on the right side of the first circuit board 10, and on the upper side of the first circuit board 10.
The second protection plate 302 is disposed at a side of the battery 40 close to the second circuit board 20 and electrically connected to the second circuit board 20, so that a second charging path is formed by a path between the first circuit board 10, the second circuit board 20, and the second protection plate 302. Wherein, referring to fig. 5 a-5 c, the side of the battery 40 close to the second circuit board 20 includes (only a part of the structure of the charging circuit 1 is shown in the figure for indicating the position relationship between the second protection plate 302 and the battery 40 and the second circuit board 20, and the following "left", "right" and "lower" are all referred to the orientation shown in the figure): is disposed on the left side of the second circuit board 20, is disposed on the right side of the second circuit board 20, or is disposed on the lower side of the second circuit board 20.
In fig. 4a to 4b, the first circuit board 10 and the second circuit board 20 are disposed along a first direction, and the first circuit board 10 and the first protection plate 301 are disposed along a second direction, the first direction being perpendicular to the second direction. That is, the first protection plate 301 is disposed at the left side of the first circuit board 10 or at the right side of the first circuit board 10. Therefore, the occupation of the external space area by the first protection plate 301 can be reduced, and the length of the charging path of the path between the first circuit board 10 and the first protection plate 301 can be reduced; at the same time, it can be ensured that the capacity of the battery 40 is substantially unchanged.
Therein, corresponding to fig. 4c, a first protection plate 301 is arranged between the first circuit board 10 and the battery 40. That is, the first protection plate 301 is disposed on the upper side of the first circuit board 10. Therefore, the occupation of the external space area by the first protection plate 301 can be reduced, and the length of the charging path of the path between the first circuit board 10 and the first protection plate 301 can be reduced; meanwhile, it is possible to ensure that the capacity of the battery 40 is substantially constant by disposing the length direction of the battery 40 in the first direction.
Wherein, corresponding to fig. 5 a-5 b, the first circuit board 10 and the second circuit board 20 are arranged along a first direction, and the second circuit board 20 and the second protection plate 302 are arranged along a second direction, the first direction being perpendicular to the second direction. That is, the second protection plate 302 is disposed at the left side of the second circuit board 20 or at the right side of the second circuit board 20. Therefore, the occupation of the external space area by the second protection plate 302 can be reduced, and the length of the charge and discharge path of the path between the second circuit board 20 and the second protection plate 302 can be reduced; at the same time, it can be ensured that the capacity of the battery 40 is substantially unchanged.
Wherein, corresponding to fig. 5c, a second protective plate 302 is arranged between the second circuit board 20 and the battery 40. That is, the second protection plate 302 is disposed at the lower side of the second circuit board 20. Therefore, the occupation of the external space area by the second protection plate 302 can be reduced, and the length of the charge and discharge path of the path between the second circuit board 20 and the second protection plate 302 can be reduced; meanwhile, it is possible to ensure that the capacity of the battery 40 is substantially constant by disposing the length direction of the battery 40 in the first direction.
Any of the embodiments shown in fig. 4a to 4c can be combined with any of the embodiments shown in fig. 5a to 5c to form a complete charging circuit 1. For example, the combination setting is performed according to the size of the space area, the length of the passage path, and the like. For example, referring to fig. 6, the first protective plate 301 is disposed on the right side of the first circuit board 10, and at the same time, the second protective plate 302 is disposed on the right side of the second circuit board 20; for example, referring to fig. 7, the first protective plate 301 is disposed on the left side of the first circuit board 10, and at the same time, the second protective plate 302 is disposed on the right side of the second circuit board 20; for example, referring to fig. 8, a first protection plate 301 is disposed between the first circuit board 10 and the battery 40, and a second protection plate 302 is disposed between the second circuit board 20 and the battery 40; for example, referring to fig. 9, a first protection plate 301 is disposed on the right side of the first circuit board 10, and a second protection plate 302 is disposed between the second circuit board 20 and the battery 40.
It should be noted that fig. 2 to 9 only show the positional relationship between different boards, and do not show the electrical connection relationship between different boards.
It should be noted that, when the battery 40 is an anisotropic battery, the battery protection circuit board 30 may also be disposed on a notch or a groove formed in the battery 40, and is flush with the surface of the battery 40, so as to further reduce the occupied space of the battery protection circuit board 30.
In the above embodiment, referring to fig. 10 (fig. 10 illustrates that the charging circuit 1 and the charging interface of the embodiment of fig. 2 are disposed on the first circuit board 10, and 104 is a charging interface in the figure), the first circuit board 10 is provided with the first connector 101, the second circuit board 20 is provided with the second connector 201, the battery protection circuit board 30 is connected to the first connector 101 through the first wire 102, and the battery protection circuit board 30 is connected to the second connector 201 through the second wire 202. Therefore, the battery protection circuit board 30 is electrically connected to the first circuit board 10 through the connector and the wire, the battery protection circuit board 30 is electrically connected to the second circuit board 20, the current between the battery protection circuit board 30 and the first circuit board 10 and the current between the battery protection circuit board 30 and the second circuit board 20 are safely guided, and the safety and reliability of the charging circuit 1 are improved.
Optionally, the first conductor 102 is a charging conductor, and the second conductor 202 is a charging and discharging conductor. Accordingly, a charging path is provided between the first circuit board 10 and the battery protection circuit board 30, and a charging path and a discharging path are provided between the second circuit board 20 and the battery protection circuit board 30. Optionally, the first conductive line 102 and the second conductive line 202 are FPC (Flexible Printed Circuit) lines.
Further, referring to fig. 10 (fig. 10 takes the charging circuit 1 of the embodiment of fig. 2 as an example), the first circuit board 10 is provided with a third connector 103, the second circuit board 20 is provided with a fourth connector 203, the third connector 103 is connected with the fourth connector 203 through a third wire 401, and the fourth connector 203 is connected with the second connector 201 through a built-in wire of the second circuit board 20. Therefore, the first circuit board 10 and the second circuit board 20 are electrically connected, the current between the first circuit board 10 and the second circuit board 20 is safely guided, and the safety and the reliability of the charging circuit 1 are improved.
In the above embodiment, the charging interface 104, the first connector 101, the first wire 102, and the battery protection circuit board 30 form the first charging path a (solid path in fig. 10, arrow represents current flow direction), and the charging interface 104, the third connector 103, the third wire 401, the fourth connector 203, the second connector 201, the second wire 202, and the battery protection circuit board 30 form the second charging path b (dotted path in fig. 10, arrow represents current flow direction).
Optionally, the connector is a BTB connector (Board To Board).
Optionally, at least one first branch and at least one second branch may be led out from charging interface 104, charging interface 104 is connected to first connector 101 through the first branch, and charging interface 104 is connected to third connector 103 through the second branch. The first circuit board 10 can realize a plurality of paths of a charging path between the first circuit board 10 and the battery protection circuit board 30 and a plurality of paths of a charging path between the first circuit board 10, the second circuit board 20 and the battery 40 protection circuit through at least one first branch and at least one second branch, thereby realizing multiple times of shunt charging and further reducing power consumption; meanwhile, when one of the paths goes wrong, the overall charging condition of the battery 40 is not influenced, and the normal charging operation of the battery 40 is ensured.
Optionally, a switch assembly is disposed on the first branch. In particular, the switching assembly comprises a first switching device K1. The first switching device K1 is disposed on the first circuit board 10 for turning on the first branch circuit according to the first signal or the second signal, and the on-state of the path between the first circuit board 10 and the battery protection circuit board 30 can be controlled by the first switching device K1. The first switching device K1 may be a switching tube, and is turned on according to the first signal or the second signal.
Optionally, a switch assembly is disposed on the second branch. In particular, the switching assembly comprises a second switching device K2. The second switching device K2 is disposed on the first circuit board 10 for turning on the second branch circuit according to the first signal and turning off the second branch circuit according to the second signal, and the on or off state of the paths among the first circuit board 10, the second circuit board 20 and the battery protection circuit board 30 can be controlled by the second switching device K2. The second switching device K2 may be a switching tube, which is turned on according to the first signal and turned off according to the second signal.
It should be noted that the first switching device and the second switching device may also be combined into the same unit, for example, a bidirectional switch, to implement different switching functions.
Optionally, the switching assembly comprises a third switching device K3. The third switching device K3 is disposed on the second circuit board 20 for turning on the electrical connection of the fourth connector 203 with the second connector 201 according to the first signal, and turning off the electrical connection of the fourth connector 203 with the second connector 201 according to the second signal, and the on or off state of the path between the first circuit board 10, the second circuit board 20 and the battery protection circuit board 30 can be controlled by the third switching device K3. The third switching device K3 may be a switching tube that is turned on or off according to the first signal or the second signal.
The charging circuit 1 provided in this embodiment includes a charging interface, a first circuit board 10, a second circuit board 20, a battery protection circuit board 30, and a control circuit 50, wherein a first charging path is formed between the first circuit board 10 and the battery protection circuit board 30, and a second charging path is formed between the first circuit board 10, the second circuit board 20, and the battery protection circuit board 30. When the charging interface is connected with the external power supply, the control circuit 50 controls the first charging path and the second charging path to be conducted, so that the charging voltage and the charging current are simultaneously charged for the battery 40 through the first charging path and the second charging path, the charging circuit adopts a shunting mode to charge, the overall path impedance is further reduced, the overall power consumption is optimized, the risk and the loss under a large-current working state are reduced, and the safety and the reliability are improved.
The present embodiment also provides an electronic device, which includes the charging circuit 1 and the battery as described in the above embodiments. The battery can supply power to other functional modules of the electronic equipment; the total occupied area of the charging circuit 1 and the battery can be adjusted according to the practical application of the electronic device. Because the charging circuit 1 can reduce the path impedance and reduce the risk and loss in a large-current working state, the electronic equipment can optimize the path of a large current according to an application scene and the working temperature in the application process, the temperature rise of the whole machine is optimized, and the safety and the reliability are high.
It should be noted that the electronic devices in the above embodiments include, but are not limited to, any products and components with a built-in battery, such as a mobile phone, a tablet computer, a notebook computer, a smart watch, and a smart sound box.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (15)
1. A charging circuit applied to an electronic device, the charging circuit comprising:
the charging interface is used for being connected with an external power supply and receiving charging voltage and current provided by the external power supply;
the first circuit board is connected with the charging interface;
the second circuit board is connected with the first circuit board; the second circuit board is a main board of the electronic equipment;
the battery protection circuit board is respectively connected with the first circuit board, the second circuit board and the battery;
the control circuit is used for controlling a first charging path between the first circuit board and the battery protection circuit board to be conducted and controlling a second charging path between the first circuit board, the second circuit board and the battery protection circuit board to be conducted when the charging interface is connected with the external power supply, so that the charging voltage and the charging current can charge the battery through the first charging path and the second charging path simultaneously;
the control circuit is further configured to acquire temperature information of the electronic device, and control the first charging path to be conducted and control the second charging path to be conducted when the temperature information is within a preset range; when the temperature information exceeds the preset range, only controlling the first charging path to be conducted; the temperature information includes temperature information of the first circuit board, temperature information of the second circuit board, and temperature information of the battery.
2. The charging circuit of claim 1, further comprising a switching component coupled to the control circuit;
the control circuit is used for outputting a first signal when the temperature information is within a preset range and outputting a second signal when the temperature information exceeds the preset range;
the switch component is used for conducting the first charging path and the second charging path according to a first signal and conducting only the first charging path according to a second signal.
3. The charging circuit according to claim 1 or 2, wherein the first circuit board, the battery, and the second circuit board are arranged in a first direction, and the battery protection circuit board are arranged in a second direction, the first direction being perpendicular to the second direction.
4. The charging circuit of claim 3, wherein the battery protection circuit board is disposed between the first circuit board and the second circuit board.
5. The charging circuit of claim 3, wherein the battery protection circuit board is disposed on a same side of the first circuit board, the battery, and the second circuit board.
6. The charging circuit according to claim 3, wherein the battery protection circuit board has an elongated structure, and a length direction of the battery protection circuit board is parallel to the first direction.
7. The charging circuit according to claim 1 or 2, wherein the battery protection circuit board comprises:
the first protection plate is arranged on one side, close to the first circuit board, of the battery and is electrically connected with the first circuit board and the battery respectively;
the second protection plate is arranged on one side, close to the second circuit board, of the battery and is electrically connected with the second circuit board and the battery respectively.
8. The charging circuit of claim 7, wherein the first circuit board, the battery, and the second circuit board are arranged in a first direction, the first circuit board and the first protective plate are arranged in a second direction, and the first direction is perpendicular to the second direction; or
The first protection plate is disposed between the first circuit board and the battery.
9. The charging circuit according to claim 7, wherein the first circuit board, the battery, and the second circuit board are arranged in a first direction, and the second circuit board and the second protection board are arranged in a second direction, the first direction being perpendicular to the second direction; or
The second protection plate is disposed between the second circuit board and the battery.
10. The charging circuit according to claim 2, wherein the first circuit board is provided with a first connector, the second circuit board is provided with a second connector, the battery protection circuit board is connected to the first connector by a first wire, and the battery protection circuit board is connected to the second connector by a second wire.
11. The charging circuit according to claim 10, wherein the first circuit board is provided with a third connector, the second circuit board is provided with a fourth connector, the third connector is connected with the fourth connector through a third wire, and the fourth connector is connected with the second connector.
12. The charging circuit of claim 11, wherein at least a first branch and at least a second branch are led out from the charging interface, the charging interface is connected with the first connector through the first branch, and the charging interface is connected with the third connector through the second branch.
13. The charging circuit of claim 12, wherein the switching assembly comprises:
and the first switching device is arranged on the first circuit board and used for conducting the first branch circuit according to a first signal or a second signal.
14. The charging circuit of claim 12, wherein the switching assembly comprises:
the second switching device is arranged on the first circuit board and used for switching on the second branch circuit according to a first signal and switching off the second branch circuit according to a second signal; or
And the third switching device is arranged on the second circuit board and used for conducting the electric connection between the fourth connector and the second connector according to a first signal and disconnecting the electric connection between the fourth connector and the second connector according to a second signal.
15. An electronic device, characterized in that the electronic device comprises a charging circuit according to any one of claims 1-14 and a battery.
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| CN201910732696.XA CN110474391B (en) | 2019-08-09 | 2019-08-09 | Charging circuit and electronic device |
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| CN201910732696.XA CN110474391B (en) | 2019-08-09 | 2019-08-09 | Charging circuit and electronic device |
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| CN110474391B true CN110474391B (en) | 2022-03-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112838626A (en) * | 2019-11-25 | 2021-05-25 | 北京小米移动软件有限公司 | Electronic device and charging method thereof, readable storage medium |
| CN111082493B (en) * | 2019-12-31 | 2024-05-24 | Oppo广东移动通信有限公司 | Terminal Equipment |
| CN111273584A (en) * | 2020-02-17 | 2020-06-12 | 维沃移动通信有限公司 | A power supply control device and electronic equipment |
| CN113394471B (en) * | 2020-03-13 | 2023-05-02 | 北京小米移动软件有限公司 | Charging method and device, electronic equipment and storage medium |
| CN114079299B (en) * | 2020-08-11 | 2025-05-13 | 北京小米移动软件有限公司 | Battery assembly, charging and discharging method and device thereof, and mobile terminal |
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