Charging management circuit, electronic equipment and charging management method

Abstract

The embodiment of the invention discloses a charging management circuit, electronic equipment and a charging management method. According to the technical scheme provided by the embodiment of the invention, the switched capacitor module and the BULK module are connected between the charging protocol chip and the battery module, the main control module is used for controlling the work of the charging protocol chip, the switched capacitor module and the BULK module, and the battery voltage of the battery module is detected through the main control module; when the battery voltage meets the constant-current charging condition, constant-current charging is carried out on the battery module through the charging protocol chip and the switched capacitor module, the electric quantity loss of a charging loop can be effectively reduced, the charging efficiency is improved, and when the battery voltage meets the constant-current charging ending condition, constant-voltage charging is carried out on the battery module through the charging protocol chip and the BULK module, so that the charging efficiency is improved. Fine adjustment charging control is carried out on the battery module, the situation that the battery module is prone to battery overvoltage during charging can be effectively reduced, and the charging effect is improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of electronic equipment, and in particular to a charging management circuit, an electronic device, and a charging management method. BACKGROUND

[0002] With the development of electronic equipment technology, people have higher and higher requirements for the charging efficiency of electronic equipment. Conventional charging management circuits have a large heat power during charging, resulting in low battery charging efficiency.

[0003] In order to improve the battery charging efficiency, a switch capacitor is usually used in combination with a programmable power supply protocol chip (PPS chip) to adjust the voltage and current of charging to charge the battery. However, the cost of the programmable power supply protocol chip is relatively high, resulting in an increase in the cost of the charging management circuit. However, using a fixed-gear charging protocol chip for charging can easily cause overvoltage of the battery, resulting in poor charging effect. SUMMARY

[0004] Embodiments of the present application provide a charging management circuit, an electronic device, and a charging management method to solve the technical problem of poor charging effect caused by using a fixed-gear charging protocol chip for charging in the related art, and can effectively reduce the overvoltage of the battery and improve the charging effect.

[0005] In a first aspect, embodiments of the present application provide a charging management circuit, comprising a master control module, a charging protocol chip, a switch capacitor module, a BULK module, and a battery module, wherein:

[0006] The control end of the switch capacitor module is connected with the master control module, the input end of the switch capacitor module is connected with the output end of the charging protocol chip, and the output end of the switch capacitor module is connected with the charging input end of the battery module;

[0007] The control end of the BULK module is connected with the master control module, the input end of the BULK module is connected with the output end of the charging protocol chip, and the output end of the BULK module is connected with the charging input end of the battery module;

[0008] The input end of the charging protocol chip is used to connect a charging power supply, and the control end of the charging protocol chip is connected with the master control module;

[0009] The master control module is connected with a charging input end of the battery module, the master control module is used for detecting a battery voltage of the battery module, in a case that the battery voltage meets a constant current charging condition, the battery module is charged with constant current through the charging protocol chip and the switched capacitor module, and in a case that the battery voltage meets a constant current charging end condition, the battery module is charged with constant voltage through the charging protocol chip and the BULK module.

[0010] In a second aspect, the embodiments of the present application provide an electronic device, comprising the charging management circuit according to any one of the first aspect.

[0011] In a third aspect, the embodiments of the present application provide a charging management method, applied to the charging management circuit according to any one of the first aspect or the electronic device according to the second aspect, and characterized in that comprising:

[0012] detecting a battery voltage of the battery module;

[0013] in a case that the battery voltage meets a constant current charging condition, charging the battery module with constant current through the charging protocol chip and the switched capacitor module;

[0014] in a case that the battery voltage meets a constant current charging end condition, charging the battery module with constant voltage through the charging protocol chip and the BULK module.

[0015] The embodiments of the present application connect the switched capacitor module and the BULK module between the charging protocol chip and the battery module, and control the working of the charging protocol chip, the switched capacitor module and the BULK module by the master control module, detect the battery voltage of the battery module by the master control module, charge the battery module with constant current through the charging protocol chip and the switched capacitor module in a case that the battery voltage meets a constant current charging condition, which can effectively reduce the power loss of the charging loop, improve the charging efficiency, and charge the battery module with constant voltage through the charging protocol chip and the BULK module in a case that the battery voltage meets a constant current charging end condition, which can effectively reduce the overvoltage of the battery module during charging, and improve the charging effect. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a principle schematic diagram of a charging management circuit provided by the embodiments of the present application;

[0017] Figure 2 is a principle schematic diagram of an electronic device provided by the embodiments of the present application;

[0018] Figure 3 is a flow schematic diagram of a charging management method provided by the embodiments of the present application.

[0019] Reference numerals in the attached diagram: 1. Main control module; 2. Charging protocol chip; 3. Switched capacitor module; 4. BULK module; 5. Battery module. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments of this application will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this application and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not all of them.

[0021] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of the operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The above process can be terminated when its operation is completed, but it may also have additional steps not included in the drawings. The above process can correspond to a method, function, procedure, subroutine, subroutine, etc.

[0022] In existing battery charging management circuits, the charging efficiency is generally low. For example, in a 30W charging solution, the charging efficiency is only around 90%, with a heat output of 3W, resulting in low charging efficiency. Similarly, in fanless remote control charging solutions (e.g., using four batteries connected in parallel), the battery charging voltage is low, the charging current is high, the voltage difference in the switching power supply of the charging circuit is large, and the switching and conduction losses during charging are significant. This leads to substantial heat generation in the charging circuit and battery during charging, affecting battery charging efficiency and severely impacting user experience.

[0023] To improve battery charging efficiency, a common approach is to use switched capacitors in conjunction with a programmable power supply (PPS) chip that flexibly adjusts the charging voltage and current. The PPS chip provides a charging efficiency of 97% in the constant current charging range. However, this charging management scheme requires a costly PPS chip to provide PPS output capability, which increases the overall cost of the charging management circuit. Using a lower-cost fixed-level charging protocol chip, which lacks a PPS protocol and provides a fixed voltage and current to power the switched capacitor circuitry, can easily lead to battery overvoltage and poor charging performance. Therefore, this application provides a charging management circuit to address the technical problem of poor charging performance caused by using a fixed-level charging protocol chip in existing charging management schemes.

[0024] Figure 1 A schematic diagram of a charging management circuit according to an embodiment of this application is provided, with reference to... Figure 1 The charging management circuit includes a main control module 1, a charging protocol chip 2, a switched capacitor module 3, a BULK module 4, and a battery module 5.

[0025] In this solution, both the switched capacitor module 3 and the BULK module 4 are equipped with a control terminal, an input terminal, and an output terminal. The control terminal of the switched capacitor module 3 is connected to the main control module 1, the input terminal of the switched capacitor module 3 is connected to the output terminal of the charging protocol chip 2, and the output terminal of the switched capacitor module 3 is connected to the charging input terminal of the battery module 5.

[0026] The control terminal of BULK module 4 is connected to the main control module 1, the input terminal of BULK module 4 is connected to the output terminal of charging protocol chip 2, and the output terminal of BULK module 4 is connected to the charging input terminal of battery module 5. The switched capacitor module 3 and BULK module 4 can function as DC-DC converters to transform (e.g., step down) the output voltage of charging protocol chip 2, thereby controlling the charging voltage for battery module 5.

[0027] In one embodiment, the input terminal of the charging protocol chip 2 provided in this solution can be used to connect to a charging power supply (e.g., a power adapter connected via a Type-C interface, the power adapter being a charging head with charging protocols such as PD2.0 or QC2.0). The control terminal of the charging protocol chip 2 is connected to the main control module 1. The charging protocol chip 2 can determine the corresponding charging protocol based on the set communication protocol and the charging power supply, and feed it back to the main control module 1. Optionally, the charging protocol chip 2 provided in this solution can provide multiple fixed-level bus voltages (e.g., 5V, 9V, 12V, 15V, etc.). The main control module 1 can control the charging protocol chip 2 to output the corresponding level, controlling the voltage and current output by the charging protocol chip 2.

[0028] In one embodiment, the main control module 1 provided in this solution is also connected to the charging input terminal of the battery module 5. The main control module 1 can be used to detect the battery voltage of the battery module 5 in real time, and control the operation of the charging protocol chip 2, the switched capacitor module 3, and the BULK module 4 according to the detected battery voltage. Optionally, the main control module 1 can sample the voltage at the charging input terminal of the battery module 5, and the sampled voltage is converted from analog to digital to obtain the battery voltage.

[0029] Optionally, when the main control module 1 controls the operation of the charging protocol chip 2, the switched capacitor module 3, and the BULK module 4 based on the detected battery voltage, it may determine whether the battery voltage meets the constant current charging condition or the constant current charging termination condition.

[0030] In one embodiment, when the battery voltage of battery module 5 meets the constant current charging condition, the main control module 1 performs constant current charging on battery module 5 through charging protocol chip 2 and switched capacitor module 3 (i.e., switching capacitor module 3 is enabled, and BULK module 4 is disabled). At this time, charging protocol chip 2 provides a fixed charging voltage to switched capacitor module 3, and switched capacitor module 3 steps down the charging voltage provided by charging protocol chip 2 to provide a suitable charging voltage to battery module 5. For example, charging protocol chip 2 provides a 9V charging voltage at a 30W charging power level (e.g., 9V3A level) to switched capacitor module 3, and the 2:1 switched capacitor module 3 steps down the charging voltage provided by charging protocol chip 2 to a 4.5V charging voltage to charge battery module 5. This achieves high-efficiency charging based on switched capacitor module 3 with a low-cost non-PPS protocol chip.

[0031] In one embodiment, when the battery voltage of battery module 5 meets the constant current charging termination condition, the constant current charging stage can be terminated early, and the battery module 5 can enter the constant voltage charging stage. At this time, the main control module 1 can perform constant current charging on battery module 5 through charging protocol chip 2 and BULK module 4 (i.e., turn off switched capacitor module 3 and enable BULK module 4). During this time, charging protocol chip 2 provides a fixed charging voltage to BULK module 4. BULK module 4, based on the charging voltage requirements of the constant current charging stage for battery module 5, reduces the charging voltage provided by charging protocol chip 2 to provide a suitable charging voltage to battery module 5. It needs to be explained that existing technologies only perform constant voltage charging when the constant voltage charging conditions are met. This solution does not use a charging chip with the PPS protocol. If constant voltage charging is only performed when the constant voltage charging conditions are met, the battery will be over-voltaged. This solution reduces the possibility of overcharging the battery module 5 during the constant voltage charging stage by ending the constant current charging stage in advance and entering the constant voltage charging stage of the battery module 5. This achieves the effect of fast battery charging and battery protection based on the switched capacitor module 3 with a low-cost non-PPS protocol chip.

[0032] In one possible embodiment, the main control module 1 provided by this solution is also used to perform trickle charging on the battery module 5 when the battery voltage does not meet the constant current charging condition (at which time the battery voltage of the battery module 5 meets the trickle charging condition). This can be achieved through the charging protocol chip 2 and the BULK module 4 (i.e., turning off the switched capacitor module 3 and enabling the BULK module 4). At this time, the charging protocol chip 2 provides a fixed-level charging voltage to the BULK module 4. The BULK module 4, based on the charging voltage requirements of the trickle charging stage for the battery module 5, reduces the charging voltage provided by the charging protocol chip 2 to provide a suitable charging voltage to the battery module 5. By entering the trickle charging stage of the battery module 5 when the battery voltage meets the trickle charging condition, low-voltage trickle charging is performed on the battery module 5, protecting battery safety and improving battery life.

[0033] The charging process of battery module 5 is generally divided into three stages: low-voltage (e.g., 3V-3.5V) trickle charging, constant-current charging (e.g., 3.5V-4V), and high-voltage (e.g., 4V or above) constant-voltage charging. This solution utilizes the BULK module 4 for charging during the trickle charging and constant-voltage charging stages when the current is relatively low, while the switched-capacitor module 3 remains inactive. During the constant-current charging stage when the current is high, the switched-capacitor module is activated, and the BULK module 4 remains inactive. This reduces switching and conduction losses during the constant-current charging stage, thereby improving charging efficiency.

[0034] The switched-capacitor module 3 provided in this solution uses a capacitor as its energy storage device. During the constant-current charging stage of the battery, the charging current is relatively large, resulting in significant switching and conduction losses. Switched-capacitor charging effectively reduces these losses. The BULK module 4 uses an inductor as its energy storage device. During the trickle charging and constant-voltage charging stages, the BULK module 4 provides control and can work with the charging protocol chip 2 to achieve finer charging control, accurately controlling low-voltage trickle charging and high-voltage constant-voltage charging. The switched-capacitor module 3 can provide battery charging with a 97% efficiency, while the BULK module 4 can provide battery charging with a 90% efficiency.

[0035] In one possible embodiment, the battery voltage provided by this solution satisfies the constant current charging condition, which can be achieved by the battery voltage reaching a first set voltage. This first set voltage can be determined based on the voltage range of the deep discharge of battery module 5. The voltage range of the deep discharge of battery module 5 can be understood as the voltage range at its charging input terminal after the battery module 5 has undergone deep discharge (during the discharge process, the amount of electricity released by battery module 5 approaches or reaches a large proportion of its rated capacity). Optionally, the voltage range of the deep discharge of battery module 5 can be determined based on the discharge characteristic curve of battery module 5.

[0036] For example, the main control module 1 monitors the battery voltage of the battery module 5 in real time. When the battery voltage is lower than the first set voltage, it determines that the battery voltage does not meet the constant current charging condition (at which point the battery voltage of the battery module 5 meets the trickle charging condition), and trickle charging of the battery module 5 can be performed through the charging protocol chip 2 and the BULK module 4. When the battery voltage is greater than or equal to the first set voltage, it determines that the battery voltage meets the constant current charging condition, and constant current charging of the battery module 5 can be performed through the charging protocol chip 2 and the switched capacitor module 3. This solution accurately determines whether the battery voltage meets the constant current charging condition based on whether the battery voltage reaches the first set voltage, and accurately determines the timing of charging through the switched capacitor module 3, effectively reducing power loss in the charging circuit and improving charging efficiency.

[0037] In one possible embodiment, the battery voltage provided by this solution satisfies the constant current charging termination condition, which may be that the battery voltage reaches a second set voltage, wherein the second set voltage is determined based on the full charge voltage of the battery module 5.

[0038] For example, the main control module 1 monitors the battery voltage of the battery module 5 in real time. When the battery voltage is lower than the second set voltage, it determines that the battery voltage does not meet the constant current charging termination condition (at this time, the battery voltage of the battery module 5 meets the trickle charging condition or the constant current charging condition). Trickle charging can be performed on the battery module 5 through the charging protocol chip 2 and the BULK module 4, or constant current charging can be performed on the battery module 5 through the charging protocol chip 2 and the switched capacitor module 3. When the battery voltage is greater than or equal to the second set voltage, it determines that the battery voltage meets the constant current charging termination condition (at this time, the battery voltage does not meet the constant voltage charging condition). Constant voltage charging can be performed on the battery module 5 through the charging protocol chip 2 and the BULK module 4. This solution accurately determines whether the battery voltage meets the constant current charging termination condition based on whether the battery voltage reaches the second set voltage, and accurately determines the timing for ending the charging of the switched capacitor module 3. This effectively reduces the possibility of battery overvoltage during charging of the battery module 5 and improves the charging effect.

[0039] In one embodiment, the second set voltage provided by this solution is less than the full-charge voltage of battery module 5. For example, assuming the full-charge voltage of battery module 5 is 4.25V, continuing constant-voltage charging when the battery voltage of battery module 5 reaches 4.25V may lead to battery overvoltage. This solution can set the second set voltage to 4.15V, and when the battery voltage reaches 4.15V, determine that the battery voltage meets the constant-current charging termination condition, end the constant-current charging stage of battery module 5, and enter the constant-voltage charging stage in advance, reducing the possibility of battery overvoltage.

[0040] It needs to be explained that existing battery charging solutions based on PPS charging chips generally use whether the battery voltage reaches its full charge voltage as the condition for entering constant voltage charging. Since this solution does not use a PPS charging chip, but instead uses a fixed-level charging protocol chip 2, if the battery voltage reaches its full charge voltage as the condition for entering constant voltage charging, the fixed-level charging protocol chip 2 will not automatically determine whether the battery module 5 is over-voltage, which could easily lead to damage to the battery module 5 due to overvoltage. This solution sets the second set voltage to be lower than the full charge voltage of the battery module 5, exiting the constant current charging stage before the battery voltage reaches its full charge voltage and entering the constant voltage charging stage earlier. This effectively reduces the likelihood of battery module 5 over-voltage during charging and improves the charging efficiency.

[0041] As described above, by connecting the switched capacitor module 3 and the BULK module 4 between the charging protocol chip 2 and the battery module 5, and using the main control module 1 to control the operation of the charging protocol chip 2, the switched capacitor module 3, and the BULK module 4, the main control module 1 detects the battery voltage of the battery module 5. When the battery voltage meets the constant current charging condition, the charging protocol chip 2 and the switched capacitor module 3 perform constant current charging on the battery module 5, which can effectively reduce the power loss of the charging circuit and improve the charging efficiency. When the battery voltage meets the constant current charging termination condition, the charging protocol chip 2 and the BULK module 4 perform constant voltage charging on the battery module 5. This fine-tuning charging control of the battery module 5 can effectively reduce the possibility of battery overvoltage during charging and improve the charging effect.

[0042] Based on the above embodiments, Figure 2 A schematic diagram of an electronic device according to an embodiment of this application is provided. This electronic device can be an unmanned device, a remote control, a mobile terminal, or other device equipped with a rechargeable battery module. (Reference) Figure 2 The electronic device includes a charging management circuit as provided in any of the above embodiments. The charging management circuit can refer to any of the above embodiments and achieve the corresponding technical effects, which will not be described in detail here.

[0043] As described above, by connecting the switched capacitor module and the BULK module in the electronic device between the charging protocol chip and the battery module, and using the main control module to control the operation of the charging protocol chip, the switched capacitor module, and the BULK module, the main control module detects the battery voltage of the battery module. When the battery voltage meets the constant current charging condition, the charging protocol chip and the switched capacitor module perform constant current charging on the battery module. This effectively reduces the power loss in the charging circuit and improves the charging efficiency. When the battery voltage meets the constant current charging termination condition, the charging protocol chip and the BULK module perform constant voltage charging on the battery module. This fine-tuning charging control of the battery module can effectively reduce the possibility of battery overvoltage during charging and improve the charging effect.

[0044] Figure 3 A flowchart illustrating a charging management method provided in an embodiment of this application is given. This charging management method can be applied to a charging management circuit or electronic device as provided in any of the above embodiments, and can be executed by the main control module in the charging management circuit or electronic device. Figure 3 As shown, the charging management methods provided in this solution include:

[0045] S110: Detects the battery voltage of the battery module.

[0046] For example, the main control module can sample the voltage at the charging input terminal of the battery module in real time according to a set sampling period (e.g., 1ms). The sampled voltage is converted from analog to digital to obtain the battery voltage. For example, the sampled voltage can be converted from analog to digital by a digital-to-analog converter configured in the main control module or an external one.

[0047] In one embodiment, when determining the battery voltage of the battery module, it can be determined whether the constant current charging condition or the constant current charging termination condition is met based on the battery voltage. If the battery voltage meets the constant current charging condition, the process jumps to step S120 to perform constant current charging on the battery module. Subsequently, if the battery voltage meets the constant current charging termination condition, the battery module is subjected to constant voltage charging.

[0048] In one possible embodiment, after detecting the battery voltage of the battery module, if the battery voltage does not meet the constant current charging condition, the process can jump to step S130 to perform trickle charging on the battery module.

[0049] For example, when the battery voltage of the battery module is determined, and the battery voltage does not meet the constant current charging condition, trickle charging is performed on the battery module through the charging protocol chip and the BULK module (i.e., the switched capacitor module is turned off and the BULK module is enabled). At this time, the charging protocol chip provides a fixed charging voltage to the BULK module. The BULK module, based on the charging voltage requirements of the battery module in the trickle charging stage, reduces the charging voltage provided by the charging protocol chip to provide a suitable charging voltage to the battery module. By entering the trickle charging stage of the battery module when the battery voltage meets the trickle charging condition, low-voltage trickle charging is performed on the battery module, protecting battery safety and improving battery life.

[0050] In one possible embodiment, the battery voltage provided by this solution satisfies the constant current charging condition, which can be achieved by the battery voltage reaching a first set voltage. The first set voltage can be determined based on the voltage range of the battery module's deep discharge. The voltage range of the battery module's deep discharge can be understood as the voltage range at its charging input terminal after deep discharge. For example, the main control module monitors the battery voltage of the battery module in real time. When the battery voltage is less than the first set voltage, it determines that the battery voltage does not meet the constant current charging condition (at which point the battery voltage meets the trickle charging condition). Conversely, when the battery voltage is greater than or equal to the first set voltage, it determines that the battery voltage meets the constant current charging condition.

[0051] This solution accurately determines whether the battery voltage meets the constant current charging condition based on whether the battery voltage reaches the first set voltage, and accurately determines the timing for charging through the switched capacitor module, effectively reducing power loss in the charging circuit and improving charging efficiency.

[0052] In one possible embodiment, the battery voltage provided by this solution satisfies the constant current charging termination condition, which can be that the battery voltage reaches a second set voltage, wherein the second set voltage is determined based on the full-charge voltage of the battery module. For example, the main control module monitors the battery voltage of the battery module in real time. When the battery voltage is less than the second set voltage, it determines that the battery voltage does not meet the constant current charging termination condition (at this time, the battery voltage of the battery module meets the trickle charging condition or the constant current charging condition). Conversely, when the battery voltage is greater than or equal to the second set voltage, it determines that the battery voltage meets the constant current charging termination condition (at this time, the battery voltage does not meet the constant voltage charging condition).

[0053] This solution accurately determines whether the battery voltage meets the constant current charging termination condition based on whether the battery voltage reaches the second set voltage, thus accurately determining when to stop charging the switching capacitor module. This effectively reduces the risk of battery overvoltage during battery module charging and improves charging efficiency.

[0054] In one embodiment, the second set voltage provided by this solution is less than the full-charge voltage of the battery module. Before the battery voltage reaches the full-charge voltage, the battery voltage can meet the constant current charging termination condition, thereby ending the constant current charging stage of the battery module and entering the constant voltage charging stage in advance, reducing the occurrence of battery overvoltage.

[0055] S120: When the battery voltage meets the constant current charging conditions, the battery module is charged at a constant current through the charging protocol chip and the switched capacitor module.

[0056] For example, when the battery voltage of the battery module meets the constant current charging conditions, the main control module can perform constant current charging on the battery module through the charging protocol chip and the switched capacitor module (i.e., enable the switched capacitor module and disable the BULK module). At this time, the charging protocol chip provides a fixed charging voltage to the switched capacitor module, and the switched capacitor module performs voltage reduction processing on the charging voltage provided by the charging protocol chip to provide a suitable charging voltage to the battery module. This achieves high-efficiency charging based on the switched capacitor module under low-cost non-PPS protocol chip conditions.

[0057] S130: When the battery voltage meets the constant current charging end condition, the battery module is charged at a constant voltage through the charging protocol chip and the BULK module.

[0058] For example, when the battery voltage of the battery module meets the constant current charging termination condition, the constant current charging stage can be terminated early, and the battery module can enter the constant voltage charging stage. At this time, the main control module can perform constant current charging on the battery module through the charging protocol chip and the BULK module (i.e., turn off the switched capacitor module and enable the BULK module). The charging protocol chip provides a fixed charging voltage to the BULK module. The BULK module, based on the charging voltage requirements of the constant current charging stage, reduces the charging voltage provided by the charging protocol chip to provide a suitable charging voltage to the battery module. This reduces the possibility of overcharging the battery module during the constant voltage charging stage, thus achieving fast battery charging and battery protection based on the switched capacitor module using a low-cost non-PPS protocol chip.

[0059] As described above, by connecting the switched capacitor module and the BULK module between the charging protocol chip and the battery module, and using the main control module to control the operation of the charging protocol chip, the switched capacitor module, and the BULK module, the main control module detects the battery voltage of the battery module. When the battery voltage meets the constant current charging condition, the charging protocol chip and the switched capacitor module perform constant current charging on the battery module. This effectively reduces the power loss in the charging circuit and improves charging efficiency. When the battery voltage meets the constant current charging termination condition, the charging protocol chip and the BULK module perform constant voltage charging on the battery module. This fine-tuning charging control of the battery module can effectively reduce the possibility of battery overvoltage during charging and improve the charging effect.

[0060] The above description is merely a preferred embodiment and the technical principles employed in this application. This application is not limited to the specific embodiments provided herein, and various obvious changes, readjustments, and substitutions that can be made by those skilled in the art will not depart from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the claims.

Claims

1. A charging management circuit, characterized in that, It includes a main control module, a charging protocol chip, a switched capacitor module, a BULK module, and a battery module, among which: The control terminal of the switched capacitor module is connected to the main control module, the input terminal of the switched capacitor module is connected to the output terminal of the charging protocol chip, and the output terminal of the switched capacitor module is connected to the charging input terminal of the battery module. The control terminal of the BULK module is connected to the main control module, the input terminal of the BULK module is connected to the output terminal of the charging protocol chip, and the output terminal of the BULK module is connected to the charging input terminal of the battery module. The input terminal of the charging protocol chip is used to connect to the charging power supply, and the control terminal of the charging protocol chip is connected to the main control module. The main control module is connected to the charging input terminal of the battery module. The main control module is used to detect the battery voltage of the battery module. When the battery voltage meets the constant current charging condition, the main control module performs constant current charging on the battery module through the charging protocol chip and the switched capacitor module. When the battery voltage meets the constant current charging termination condition, the main control module performs constant voltage charging on the battery module through the charging protocol chip and the BULK module.

2. The charging management circuit according to claim 1, characterized in that, The main control module is also used to trickle charge the battery module through the charging protocol chip and the BULK module when the battery voltage does not meet the constant current charging conditions.

3. The charging management circuit according to claim 1, characterized in that, The battery voltage satisfies the constant current charging conditions, including: The battery voltage reaches a first set voltage, wherein the first set voltage is determined based on the voltage range of the deep discharge of the battery module.

4. The charging management circuit according to claim 1, characterized in that, The battery voltage satisfies the constant current charging termination condition, including: The battery voltage reaches a second set voltage, wherein the second set voltage is determined based on the full charge voltage of the battery module.

5. The charging management circuit according to claim 4, characterized in that, The second set voltage is less than the full-charge voltage of the battery module.

6. An electronic device, characterized in that, Includes the charging management circuit as described in any one of claims 1-5.

7. A charging management method, applied to the charging management circuit as described in any one of claims 1-5 or the electronic device as described in claim 6, characterized in that, include: Detect the battery voltage of the battery module; When the battery voltage meets the constant current charging conditions, the battery module is charged at a constant current through the charging protocol chip and the switched capacitor module. When the battery voltage meets the constant current charging termination condition, the battery module is charged under constant voltage by the charging protocol chip and the BULK module.

8. The charging management method according to claim 7, characterized in that, After detecting the battery voltage of the battery module, the method further includes: If the battery voltage does not meet the constant current charging condition, the battery module is trickled charged through the charging protocol chip and the BULK module.

9. The charging management method according to claim 7, characterized in that, The battery voltage satisfies the constant current charging conditions, including: The battery voltage reaches a first set voltage, wherein the first set voltage is determined based on the voltage range of the deep discharge of the battery module.

10. The charging management method according to claim 7, characterized in that, The battery voltage satisfies the constant current charging termination condition, including: The battery voltage reaches a second set voltage, wherein the second set voltage is determined based on the full charge voltage of the battery module.

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