Charging circuit, battery and electronic equipment

Abstract

The invention relates to a charging circuit, a battery and electronic equipment, the charging circuit comprises an input end and a battery, and the input end outputs charging current to charge the battery; the first branch comprises a management element, one end of the management element is electrically connected with the input end, and the other end of the management element is electrically connected with the battery; the second branch circuit comprises a charging element, one end of the charging element is electrically connected with the input end, the other end of the charging element is electrically connected with the battery, the first branch circuit and the second branch circuit are connected in parallel, and charging current charges the battery through the first branch circuit and the second branch circuit. According to the charging circuit, the charging current charges the battery through the first branch circuit provided with the management element and the second branch circuit provided with the charging element, so that the total charging current can meet the requirement of the charging current, the charging element and the corresponding branch circuit do not need to be additionally arranged, the production cost of the charging circuit is reduced, and the charging efficiency is improved. A larger installation space is obtained, and the integrated design of a charging circuit is facilitated.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery charging, and in particular, to a charging circuit, a battery, and an electronic device. Background Art

[0002] With the rapid development of mobile communication technologies, electronic devices such as mobile phones and tablet computers have become indispensable devices in people's daily lives. To facilitate users' daily use and reduce the situation where electronic devices are in a low battery state, many electronic devices are configured with a fast charging function.

[0003] To improve the charging speed of electronic devices, the charge pump technology has become the mainstream fast charging solution for electronic devices. The fast charging solutions on the market mainly include 33W single-cell solutions, 60 - 67W single-cell solutions, 80W single-cell solutions, 80W dual-cell solutions, 120W single-cell solutions, 120W dual-cell solutions, etc. These solutions correspond to different charge pump settings. For example, the 60 - 67W single-cell solution uses two 2:1 charge pumps in parallel. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a charging circuit, a battery, and an electronic device.

[0005] According to a first aspect of an embodiment of the present disclosure, a charging circuit is provided. The charging circuit includes: an input terminal and a battery, where the input terminal outputs a charging current to charge the battery; a first branch, the first branch includes a management component, one end of the management component is electrically connected to the input terminal, and the other end of the management component is electrically connected to the battery; a second branch, the second branch includes a charging component, one end of the charging component is electrically connected to the input terminal, and the other end of the charging component is electrically connected to the battery, and the first branch and the second branch are in parallel, where the charging current charges the battery through the first branch and the second branch.

[0006] In some embodiments, when the charging current is greater than or equal to a first threshold current, the first branch is turned on, the second branch is turned on, and the input terminal charges the battery through the first branch and the second branch.

[0007] In some embodiments, the first threshold current is less than or equal to the maximum rated output current of the charging component.

[0008] In some embodiments, when the charging current is greater than a second threshold current and less than the first threshold current, the first branch is turned off, the second branch is turned on, and the input terminal charges the battery through the second branch.

[0009] In some embodiments, when the charging current is less than or equal to the second threshold current, the first branch is turned on, the second branch is turned off, and the input terminal charges the battery through the first branch.

[0010] In some embodiments, the charging circuit further includes: a processor, and the processor changes the output current of the charging element.

[0011] In some embodiments, the first threshold current is 8 - 10 A.

[0012] In some embodiments, the second threshold current is 1 A - 3 A.

[0013] In some embodiments, the management element is a power management integrated circuit; the charging element is a charge pump.

[0014] In some embodiments, the battery is a single - cell battery and the charging element is a 2:1 charge pump, or the battery is a dual - cell battery and the charging element is a 4:2 charge pump.

[0015] According to a second aspect of the embodiments of the present disclosure, there is provided a battery, which includes: the charging circuit according to any one of the first aspect.

[0016] According to a third aspect of the embodiments of the present disclosure, there is provided an electronic device, which includes: the charging circuit according to any one of the first aspect, or the battery according to the second aspect.

[0017] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: By charging the battery through the first branch provided with the management element and the second branch provided with the charging element for the charging current, the total charging current can meet the charging current requirement, without the need to additionally increase the charging element and the corresponding branch, thereby reducing the production cost of the charging circuit, obtaining a larger installation space, and facilitating the integrated design of the charging circuit.

[0018] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0020] Figure 1 It is a schematic diagram of the structural connection relationship of a charging circuit shown according to an exemplary embodiment.

[0021] Figure 2It is a schematic diagram of the structural connection relationship of another charging circuit shown according to an exemplary embodiment.

[0022] Figure 3 It is a schematic diagram of the current flow relationship of a charging circuit shown according to an exemplary embodiment.

[0023] Figure 4 It is a schematic diagram of the current flow relationship of another charging circuit shown according to an exemplary embodiment.

[0024] Figure 5 It is a schematic diagram of the charging logic flow of a charging circuit shown according to an exemplary embodiment.

[0025] Figure 6 It is a schematic diagram of the charging logic flow of a charging circuit shown according to an exemplary embodiment. Detailed implementation mode

[0026] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0027] In the related art, in some existing single-cell and some dual-cell charging schemes, two parallel charge pumps are used for fast charging, and the component cost of the charge pump is relatively high, and the two charge pumps will occupy a relatively large circuit board area, making the circuit design space of the charging circuit tight.

[0028] To solve the above technical problems, according to an embodiment of the present disclosure, a charging circuit is provided. The charging circuit includes: an input end and a battery, and the input end outputs a charging current to charge the battery; a first branch, the first branch includes a management component, one end of the management component is electrically connected to the input end, and the other end of the management component is electrically connected to the battery; a second branch, the second branch includes a charging component, one end of the charging component is electrically connected to the input end, and the other end of the charging component is electrically connected to the battery, and the first branch and the second branch are in parallel, wherein the charging current charges the battery through the first branch and the second branch.

[0029] The present disclosure charges a battery by passing a charging current through a first branch provided with a management component and a second branch provided with a charging component, so that the total charging current can meet the charging current requirement, without the need to additionally increase the charging component and the corresponding branch, thereby reducing the production cost of the charging circuit, obtaining a larger installation space, and contributing to the integrated design of the charging circuit.

[0030] It can be understood that the charging circuit involved in the present disclosure can be applied to any one of the following listed terminals.

[0031] It can be understood that the terminal involved in the present disclosure can also be referred to as a terminal device, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc., and is a device that provides voice and / or data connectivity to a user. For example, the terminal can be a handheld device with a wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: a smart phone, a pocket personal computer (PPC), a palm computer, a personal digital assistant (PDA), a laptop computer, a tablet computer, a wearable device, or a vehicle-mounted device, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device can also be a vehicle-mounted device. It should be understood that the present disclosure embodiment does not limit the specific technologies and specific device forms adopted by the terminal.

[0032] Figure 1 It is a schematic diagram of the structural connection relationship of a charging circuit shown according to an exemplary embodiment. Figure 3 It is a schematic diagram of the current flow relationship of a charging circuit shown according to an exemplary embodiment.

[0033] In some embodiments, as Figure 1 and Figure 3 shown, the charging circuit includes an input terminal 1, a battery 3, a first branch, and a second branch.

[0034] The battery 3 can be a device that converts the energy originally stored in itself into electric energy.

[0035] The input terminal 1 can be a port for accessing current when the charging circuit enters the charging state. The charging current can be input into the charging circuit from the input terminal 1, and the input terminal 1 can output the charging current to the battery 3 to charge the battery 3.

[0036] The first branch may include a management component 11, and the management component 11 may be a component for management and control. Exemplarily, the management component may be used to manage and control the battery 3. One end of the management component 11 may be electrically connected to the input terminal 1, and the other end of the management component 11 may be electrically connected to the battery 3.

[0037] The second branch may include a charging component 21. The charging component 21 may be applicable. One end of the charging component 21 may be electrically connected to the input terminal 1, and the other end of the charging component 21 may be electrically connected to the battery 3. The first branch may be connected in parallel with the second branch.

[0038] Among them, the charging current may charge the battery 3 through the first branch and the second branch.

[0039] By charging the battery 3 with the charging current passing through the first branch provided with the management component 11 and the second branch provided with the charging component 21, the charging current is shared by the first branch provided with the management component 11 while charging through the second branch provided with the charging component 21, so that the total charging current is larger, which can meet the demand of the charging current, without the need to additionally increase the charging component 21 and the corresponding branch, thereby reducing the production cost of the charging circuit, obtaining a larger installation space, and contributing to the integrated design of the charging circuit.

[0040] In some embodiments, the input terminal 1 may be a charging port, and the charging port may be used to connect to an external charger. Exemplarily, the charging port may be a Type-C Universal Serial Bus port.

[0041] In some embodiments, the management component 11 may be a power management integrated circuit. The power management integrated circuit may control and manage all aspects of the power system. Exemplarily, the power management integrated circuit may control and manage battery 3 charging, power conversion, power monitoring, and power management, etc.

[0042] The charging component 21 may be a charge pump. A charge pump is a DC-to-DC converter. The charge pump may use capacitors for high-energy charge storage to increase or decrease the voltage, thereby increasing the charging rate. The charge pump circuit has high electrical efficiency and reduces the power loss during charging.

[0043] In some embodiments, the battery 3 may be a lithium-ion battery. A lithium-ion battery is a rechargeable battery that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charge and discharge process, Li+ shuttles back and forth between the two electrodes for insertion and extraction. When charging the battery, Li+ is extracted from the positive electrode and inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite occurs during discharge. Generally, a battery using a material containing lithium element as the electrode is a representative of modern high-performance batteries.

[0044] In some embodiments, when the charging current is greater than or equal to the first threshold current, the first branch can become conductive, the second branch can become conductive, and the input terminal 1 can charge the battery 3 through the first branch provided with the management component 11 and the second branch provided with the charging component 21.

[0045] The charging current realizes high-efficiency charging through the second branch provided with the charging component 21, and shares the additional charging current through the first branch provided with the management component, so that the total current of the charging current can be increased, thus meeting the required current for fast charging.

[0046] Exemplarily, the first threshold current can be 9A. When the charging current is greater than or equal to 9A, the first branch can share 3A of current, and the second branch can share 9A of current, so that the total current of the charging current can reach 12A, thereby increasing the charging speed of the battery 3.

[0047] By charging the battery 3 through the first branch provided with the management component 11 and the second branch provided with the charging component 21, when the charging current is greater than or equal to the first threshold current, the charging circuit can charge through the second branch provided with the charging component 21 while sharing the charging current through the first branch provided with the management component, so that the total charging current is larger, meeting the requirement of the charging current, without the need to additionally increase the charging component 21 and the corresponding branch, thus reducing the production cost of the charging circuit, obtaining a larger installation space, and contributing to the integrated design of the charging circuit.

[0048] In some embodiments, the first threshold current can be less than or equal to the maximum rated output current of the charging component 21. By configuring the first threshold current to be less than or equal to the maximum rated output current of the charging component 21, when the required current of the charging current exceeds the maximum rated output current of the charging component 21, the first branch becomes conductive to share the current, which can improve the total charging efficiency of the charging circuit.

[0049] Exemplarily, the maximum rated output current of the charging component 21 can be 9A, and the first threshold current can be 9A. When the charging current is greater than or equal to 9A, the first branch can share 3A of current, and the second branch can share 9A of current, so that the total current of the charging current can reach 12A, thereby increasing the charging speed of the battery 3.

[0050] The battery 3 is charged by passing a charging current through a first branch provided with a management component 11 and a second branch provided with a charging component 21. When the charging current is greater than or equal to a first threshold current, the charging circuit can charge through the second branch provided with the charging component 21 while sharing the charging current through the first branch provided with the management component 11, so that the total charging current is larger, meeting the demand for the charging current, without the need to additionally increase the charging component 21 and the corresponding branch, thereby reducing the production cost of the charging circuit, obtaining a larger installation space, and contributing to the integrated design of the charging circuit.

[0051] In some embodiments, when the charging current is greater than a second threshold current and less than the first threshold current, the first branch is disconnected and the second branch is turned on, and the input terminal 1 charges the battery 3 through the second branch.

[0052] Since the charging efficiency of the second branch provided with the charging component 21 is higher than that of the first branch provided with the management component 11, when the charging circuit is configured to be less than the first threshold current, charging the battery 3 only through the second branch can improve the total efficiency of the charging circuit. And since the time when the charging current value is greater than the first threshold current is short during the charging process, when the charging circuit is greater than the first threshold current, turning on both the first branch and the second branch simultaneously can reduce the influence of the first branch with lower charging efficiency on the total charging efficiency, reduce the heat during charging, and shorten the charging time.

[0053] In some embodiments, when the charging current is less than or equal to the second threshold current, the first branch is turned on and the second branch is disconnected, and the input terminal 1 charges the battery 3 through the first branch.

[0054] As the charging progresses and the voltage of the battery 3 rises, the constant voltage charging stage begins. The current decreases slowly from the maximum value as the charging process continues according to the saturation degree of the battery cells, and finally the charging terminates. Since the charge pump serving as the charging component 21 cannot support low-current charging, when the charging current is less than or equal to the second threshold current, it is necessary to turn on the first branch, disconnect the second branch, and perform constant voltage charging through the management component 11. By performing constant voltage charging, the electricity storage capacity of the battery 3 can be fully exerted.

[0055] In some embodiments, the charging circuit may include a processor 6. The processor 6 can be communicatively connected to the charging component 21. The processor 6 can change the output current of the charging component 21 and control the on / off of the charging component 21. Thus, the conduction state of the second branch and the current amount of the second branch can be controlled.

[0056] In some embodiments, the first threshold current may be 8 - 10 A. Exemplarily, the first threshold current may be 9 A, and the maximum rated output current of the charging component 21 may be 9 A.

[0057] The present disclosure is not limited thereto. When the maximum rated output current of the charging element 21 is other values, the first threshold current can be changed accordingly.

[0058] In some embodiments, the second threshold current can be 1A to 3A. Exemplarily, the second threshold current can be 2A. When the charging demand is less than or equal to 2A, constant voltage charging starts, so as to fully exert the power storage capacity of the battery 3.

[0059] Figure 2 is a schematic diagram of the structural connection relationship of another charging circuit shown according to an exemplary embodiment. Figure 4 is a schematic diagram of the current flow relationship of another charging circuit shown according to an exemplary embodiment.

[0060] In some embodiments, as Figure 1 shown, the battery 3 is a single-cell battery 3, and the charging element 21 is a 2:1 charge pump. When the battery 3 is a single-cell battery 3, the upper limit of the charging power of the charging circuit can be 40-67W. Exemplarily, the charging scheme of the charging circuit can be a 60W-67W charging scheme.

[0061] The present disclosure charges the battery 3 by making the charging current pass through the first branch provided with a power management integrated circuit and the second branch provided with a charge pump, so that the total charging current can meet the charging current requirements of the 60W-67W charging scheme, and there is no need to set two charge pumps, thereby reducing the charge pump setting cost, reducing the total production cost of the charging circuit, and obtaining a larger installation space by reducing the charge pump, which is helpful for the integrated design of the charging circuit.

[0062] In some embodiments, as Figure 2 shown, the battery 3 is a dual-cell battery 3, and the charging element 21 is a 4:2 charge pump. When the battery 3 is a dual-cell battery 3, the upper limit of the charging power of the charging circuit can be 90-120W. Exemplarily, the charging scheme of the charging circuit can be a 120W charging scheme.

[0063] The present disclosure charges the battery 3 by making the charging current pass through the first branch provided with a power management integrated circuit and the second branch provided with a charge pump, so that the total charging current can meet the charging current requirements of the 120W charging scheme, and there is no need to set two charge pumps, thereby reducing the charge pump setting cost, reducing the total production cost of the charging circuit, and obtaining a larger installation space by reducing the charge pump, which is helpful for the integrated design of the charging circuit.

[0064] In some embodiments, as Figure 1 and Figure 2As shown, the charging circuit further includes an overcurrent and overvoltage protector 4. One section of the overcurrent and overvoltage protector 4 is connected to the input terminal 1, and the other end of the overcurrent and overvoltage protector 4 is connected in series with the first branch and the second branch. The overcurrent and overvoltage protector 4 can monitor the current and voltage in the circuit by detecting the magnitudes of the voltage and current in the charging circuit. When the current or voltage value exceeds the specified threshold, the overcurrent and overvoltage protector 4 can protect the circuit components and lines by cutting off the circuit.

[0065] In some embodiments, as Figure 2 shown, the charging circuit further includes a voltage converter 5. The voltage converter 5 can perform voltage conversion on the dual-cell battery 3, so that the voltage of the dual-cell battery 3 can be converted into the voltage required by the electronic device or other electronic components after passing through the voltage converter 5.

[0066] Figure 5 is a schematic diagram of the charging logic flow of a charging circuit shown according to an exemplary embodiment. Figure 6 is a schematic diagram of the charging logic flow of a charging circuit shown according to an exemplary embodiment.

[0067] In some embodiments, as Figure 5 and Figure 6 shown, when the charging circuit is connected to a power source, the charging circuit can enter the charging state.

[0068] The management component 11 can obtain the current battery information. The battery information can include the remaining power of the battery 3. The charging current is determined by communicating with the charger according to the remaining power of the battery 3. Then, according to the magnitude of the charging current, the conduction states of the first branch and the second branch are determined. The input terminal 1 can input the charging current to the battery 3 through the first branch and / or the second branch to charge the battery 3.

[0069] When the remaining power of the battery 3 is lower than the first threshold power, the charging circuit changes to the high-current constant-current charging mode. The management unit communicates with the charger to determine the charging current to be greater than or equal to the first threshold current and makes the first branch and the second branch conduct. The charging current input by the input terminal 1 can be delivered to the battery 3 through the first branch and the second branch to charge the battery 3.

[0070] Exemplarily, as Figure 6 shown, the charging current is determined to be 12A by communicating with the charger according to the remaining power of the battery 3. Among them, the first threshold current can be 9A, and the maximum rated input current of the charging component 21 is 9A. At this time, the current of the second branch can be 9A, and the current of the first branch can be 3A. The sum of the currents of the first branch and the second branch is 12A.

[0071] The battery 3 is charged by passing a charging current through a first branch provided with a management component 11 and a second branch provided with a charging component 21, so that while the charging current charges through the second branch provided with the charging component 21, the charging current is shared by the first branch provided with the management component 11, thereby making the total charging current larger, meeting the requirement of the charging current, without the need to additionally increase the charging component 21 and the corresponding branch, thus reducing the production cost of the charging circuit, obtaining a larger installation space, and contributing to the integrated design of the charging circuit.

[0072] And since during the charging process, the time when the charging current value is greater than the first threshold current is short, so when the charging circuit is greater than the first threshold current, the first branch and the second branch are simultaneously turned on, which can reduce the influence of the first branch with lower charging efficiency on the total charging efficiency, reduce the heat during the charging process, and shorten the charging time.

[0073] When the remaining power of the battery 3 is higher than the first threshold power and lower than the second threshold power, the charging circuit changes to a low-current constant-current charging mode. The management unit communicates with the charger to determine the charging current to be greater than the second threshold current and less than the first threshold current. And the first branch is disconnected and the second branch is turned on. The charging current input from the input terminal 1 can be delivered to the battery 3 through the second branch to charge the battery 3.

[0074] Exemplarily, as Figure 6 shown, the charging current is determined to be 8A according to the remaining power of the battery 3 and communicating with the charger. Among them, the first threshold current can be 9A, the second threshold current can be 2A, the maximum rated input current of the charging component 21 is 9A, and the current of the second branch is 8A.

[0075] The charging efficiency of the second branch provided with the charging component 21 is higher than that of the first branch provided with the management component 11. Exemplarily, the charging component 21 can be a charge pump, and the charging efficiency can be 97%. The management component 11 is a power management integrated circuit, and the charging efficiency can be 90%. Therefore, charging through the second branch can reduce the overall heat generation of the charging circuit during the charging process, reduce the power loss, and improve the total charging efficiency.

[0076] When the remaining power of the battery 3 is greater than the second threshold power, the charging circuit changes to a constant-voltage charging mode. The management unit communicates with the charger, the charging voltage is controlled to be a fixed value, the charging current decreases continuously during the charging process and is less than the second threshold current, and the first branch is turned on and the second branch is disconnected. The charging current input from the input terminal 1 can be delivered to the battery 3 through the first branch to charge the battery 3.

[0077] Exemplarily, as Figure 6 shown, the second threshold current is 2A.

[0078] In the constant voltage charging mode, as the charging progresses, the current decreases gradually from the maximum value according to the saturation level of the battery cell as the charging process continues until the charging terminates. Since the charge pump serving as the charging element 21 cannot support low-current charging, when the charging current is less than or equal to the second threshold current, the first branch needs to be turned on and the second branch needs to be turned off, and constant voltage charging is performed through the management element 11. By performing constant voltage charging, the electricity storage capacity of the battery 3 can be fully utilized.

[0079] In some embodiments, when the charging circuit is connected to a power source, the charging circuit can enter the charging state.

[0080] The management element 11 can obtain the current battery information, and the battery information can include the remaining power of the battery 3. The current amount of the charging current is determined by communicating with the charger based on the remaining power of the battery 3.

[0081] When it is determined that the charging current is greater than the second threshold current and less than the first threshold current, the first branch can be directly turned off and the second branch can be turned on. This can not only ensure that the maximum charging current meets the requirements, but also reduce the time for the first branch with lower charging efficiency to participate in the charging process, and reduce the impact on the total charging time.

[0082] The charging current input at the input terminal 1 can be delivered to the battery 3 through the second branch to charge the battery 3.

[0083] Exemplarily, as Figure 6 shown, when the charging circuit is connected to a power source, the charging current is determined to be 8A by communicating with the charger based on the remaining power of the battery 3. Among them, the first threshold current can be 9A, the second threshold current can be 2A, the maximum rated input current of the charging element 21 at this time is 9A, and the current of the second branch can be 8A at this time.

[0084] The charging efficiency of the second branch provided with the charging element 21 is higher than that of the first branch provided with the management element 11. Exemplarily, the charging element 21 can be a charge pump, and the charging efficiency can be 97%. The management element 11 is a power management integrated circuit, and the charging efficiency can be 90%. Therefore, charging through the second branch can reduce the overall heat generation of the charging circuit during the charging process, reduce power loss, and improve the total charging efficiency.

[0085] In some embodiments, the battery information can also include the battery temperature. During the charging process, the increase in the battery temperature caused by charging heat or an external high-temperature environment will damage the performance of the battery 3 and pose a safety hazard to the battery 3. Therefore, when the battery temperature is greater than the temperature threshold, the charging circuit can change the charging current to make the charging current decrease to be less than or equal to the third current threshold.

[0086] By reducing the amount of current of the charging current, the heat generation during charging is reduced, and the battery temperature is lowered.

[0087] When the temperature of the battery 3 returns to the normal level, the charging circuit resumes the amount of current of the charging current and normally charges the battery 3.

[0088] Based on the same concept, an embodiment of the present disclosure also provides a battery.

[0089] In some embodiments, the battery 3 may include a battery cell and a protection circuit board, and the charging circuit may be disposed on the protection circuit board.

[0090] The protection circuit board is electrically connected to the battery cell and the main board of the electronic device. It protects the battery cell, is used to detect and control the voltage of the battery cell and the working current and voltage of the charge and discharge circuit, ensures the safe use of the battery cell, and realizes electrical conduction with the main board to provide power for the main board. The protection circuit board can be fastened to the main board of the electronic device through a board-to-board connector (BTB) on the flexible circuit board to achieve electrical conduction with the main board. Functional devices are installed on the protection circuit board, and these functional devices are electrically conducted with the main board through the traces of the flexible circuit board. The functional devices may include control ICs (encryption ICs), MOS switches, resistors, capacitors, and auxiliary devices such as NTC, ID memories, and coulomb counters IIC. Among them, the control IC controls the MOS switch to conduct under normal circumstances, enabling the battery cell to communicate with the external circuit. When the voltage of the battery cell or the loop current exceeds the specified value, it can quickly control the MOS switch to turn off to protect the safety of the battery cell. Capacitors and auxiliary devices (Negative temperature coefficient, NTC), also known as negative temperature coefficients, have a reduced resistance when the ambient temperature rises, enabling the charging device to react in a timely manner and control an internal interruption to stop charging and discharging. The ID memory stores information such as the type of battery and the production date, which plays a role in the traceability of the battery and the limitation of its application.

[0091] By charging the battery 3 with the charging current passing through the first branch provided with the management element 11 and the second branch provided with the charging element 21, the total charging current can meet the charging current requirement without the need to additionally increase the charging element 21 and the corresponding branch, thereby reducing the production cost of the charging circuit, obtaining a larger installation space, contributing to the integrated design of the charging circuit, and reducing the cost of the fast charging solution for the battery 3.

[0092] Based on the same concept, an embodiment of the present disclosure also provides an electronic device.

[0093] Among them, the electronic device can be a laptop computer, a desktop computer, a mobile phone, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, a translator, and wearable devices such as a watch and a bracelet, etc., and can be any electronic device with a charging circuit. In the following description, a mobile phone is taken as an example for illustration, but the present disclosure is not limited thereto.

[0094] In some embodiments, the electronic device may include a charging circuit. By making the charging current pass through the first branch provided with the management element 11 and the second branch provided with the charging element 21 to charge the battery 3, the total charging current can meet the charging current requirement, without the need to additionally increase the charging element 21 and the corresponding branch, thereby reducing the production cost of the charging circuit, obtaining a larger installation space, facilitating the integrated design of the charging circuit, and reducing the cost of equipping the electronic device with a fast charging solution.

[0095] In the embodiments of the present disclosure, by making the charging current pass through the first branch provided with the management element 11 and the second branch provided with the charging element 21 to charge the battery 3, the total charging current can meet the charging current requirement, without the need to additionally increase the charging element 21 and the corresponding branch, thereby reducing the production cost of the charging circuit, obtaining a larger installation space, and facilitating the integrated design of the charging circuit.

[0096] It can be understood that "a plurality of" in the present disclosure means two or more, and other quantifiers are similar. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The singular forms of "a", "the", and "said" also aim to include the plural forms, unless the context clearly indicates otherwise.

[0097] Furthermore, it can be understood that terms such as "second", "second", etc. are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other and do not represent a specific order or importance. In fact, expressions such as "second", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the second information can also be called the second information, and similarly, the second information can also be called the second information.

[0098] It can be further understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this embodiment and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0099] It can be further understood that unless otherwise specified, "connection" includes both direct connection without other components between the two, and indirect connection with other elements between the two.

[0100] It can be further understood that although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be construed as requiring the operations to be performed in the specific order shown or in a serial order, or requiring all the operations shown to obtain the desired result. In a specific environment, multitasking and parallel processing may be advantageous.

[0101] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include well-known knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0102] It should be understood that the present disclosure is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A charging circuit, characterized in that, The charging circuit includes: An input terminal and a battery, and the input terminal outputs a charging current to charge the battery; A first branch, the first branch includes a management component, one end of the management component is electrically connected to the input terminal, and the other end of the management component is electrically connected to the battery; A second branch, the second branch includes a charging component, one end of the charging component is electrically connected to the input terminal, and the other end of the charging component is electrically connected to the battery, the first branch and the second branch are in parallel, wherein, the charging current charges the battery through the first branch and the second branch.

2. The charging circuit according to claim 1, wherein when the charging current is greater than or equal to a first threshold current, the first branch is turned on, the second branch is turned on, and the input terminal charges the battery through the first branch and the second branch.

3. The charging circuit according to claim 2, wherein the first threshold current is less than or equal to the maximum rated output current of the charging component.

4. The charging circuit according to claim 2, wherein when the charging current is greater than a second threshold current and less than the first threshold current, the first branch is turned off, the second branch is turned on, and the input terminal charges the battery through the second branch.

5. The charging circuit according to claim 4, wherein when the charging current is less than or equal to the second threshold current, the first branch is turned on, the second branch is turned off, and the input terminal charges the battery through the first branch.

6. The charging circuit according to claim 5, wherein It further includes: A processor, and the processor changes the output current of the charging component.

7. The charging circuit according to claim 4, wherein the first threshold current is 8 - 10A.

8. The charging circuit according to claim 7, wherein the second threshold current is 1A - 3A.

9. The charging circuit according to claim 1, wherein the management component is a power management integrated circuit; the charging component is a charge pump.

10. The charging circuit according to claim 1, wherein the battery is a single-cell battery, the charging component is a 2:1 charge pump, or the battery is a dual-cell battery, the charging component is a 4:2 charge pump.

11. A battery, characterized in that, It includes: The charging circuit according to any one of claims 1 to 10.

12. An electronic device, characterized in that, It includes: The charging circuit according to any one of claims 1 to 10, or the battery according to claim 11.

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