Power supply control system, control method and electronic device of multi-tab battery

Abstract

The present disclosure relates to a power supply control system, method and electronic device of a multi-pole ear battery, comprising: a charge-discharge circuit and a three-electricity-core battery; the three-electricity-core battery comprises a battery connector, and the battery connector at least comprises a first battery connector and a second battery connector; the charge-discharge circuit comprises a boost circuit module, a buck circuit module, a charge pump circuit module, an auxiliary buck circuit module, a battery charge-discharge control module and a system power supply module; the battery charge-discharge control module is a control module for controlling the boost circuit module, the buck circuit module, the charge pump circuit module and the auxiliary buck circuit module to work in corresponding charge-discharge stages; the boost circuit module works in a trickle charging stage, a constant-voltage charging stage and a charging cutoff stage; the charge pump circuit module works in a constant-current charging stage; the buck circuit module works in a constant-current charging stage, a constant-voltage charging stage and a charging cutoff stage; and the auxiliary buck circuit module works in a discharging stage, thereby improving the charging efficiency.

Description

Technical Field

[0001] This disclosure relates to the field of battery charging technology, and in particular to a power control system, control method and electronic equipment for multi-tab batteries. Background Technology

[0002] A rechargeable battery is a battery with a limited number of recharge cycles, used in conjunction with a charger. By charging the battery, it can be reused, which helps meet economic and environmental needs. The charging process is the reverse of the discharging process; specifically, it is the process of converting electrical energy into chemical energy stored in the battery.

[0003] Currently, electronic devices primarily use single-cell batteries for charging. However, because a single-cell battery's voltage is around 4.5V when fully charged, the circuit board at the battery end heats up significantly when the charging current exceeds 8A. To address this, the battery connector typically needs to be replaced with one that has lower impedance and higher current capacity, increasing hardware costs. Furthermore, wiring and heat dissipation within the battery end circuit board become more challenging. To meet heat dissipation requirements, the charging power of a typical single-cell battery is around 36W, resulting in relatively low charging efficiency. Summary of the Invention

[0004] To solve the above-mentioned technical problems, or at least partially solve them, this disclosure provides a power control system, control method, and electronic device for a multi-tab battery, which improves charging efficiency.

[0005] In one aspect, this disclosure provides a power control system for a multi-tab battery, including a charging and discharging circuit and a three-cell battery.

[0006] The three-cell battery includes a battery connector, which includes at least a first battery connector and a second battery connector.

[0007] The charging and discharging circuit includes a boost circuit module, a buck circuit module, a charge pump circuit module, an auxiliary buck circuit module, a battery charging and discharging control module, and a system power supply module.

[0008] The AC / DC adapter is electrically connected to the boost circuit module, the buck circuit module, and the charge pump circuit module, respectively. The battery charge / discharge control module is electrically connected to the boost circuit module, the buck circuit module, the charge pump circuit module, the three-cell battery, and the auxiliary buck circuit module, respectively. The system power supply module is electrically connected to the buck circuit module and the auxiliary buck circuit module, respectively. The first battery connector and the second battery connector of the three-cell battery are electrically connected to the boost circuit module and the charge pump circuit module, respectively. The three-cell battery is also electrically connected to the auxiliary buck circuit module.

[0009] The battery charge and discharge control module is a control module that controls the boost circuit module, the buck circuit module, the charge pump circuit module, and the auxiliary buck circuit module to work in the corresponding charge and discharge stages.

[0010] The boost circuit module operates in the trickle charging stage, the constant voltage charging stage, and the charging cutoff stage.

[0011] The charge pump circuit module operates in the constant current charging stage, and is a circuit module that ensures that the current output by the charge pump circuit module is greater than the input current and that the voltage output by the charge pump circuit module is less than the input voltage.

[0012] The step-down circuit module operates in a constant current charging stage, a constant voltage charging stage, and a charging cutoff stage. It is a circuit module that converts the charging voltage into a voltage suitable for the power supply module of the system.

[0013] The auxiliary step-down circuit module operates during the discharge phase and is a circuit module that converts the discharge voltage of the three-cell battery into a voltage suitable for the system power supply module.

[0014] Optionally, the charge pump circuit module includes N charge pump circuit sub-modules connected in parallel; N ≥ 1 and is an integer;

[0015] The N charge pump circuit submodules are respectively connected to the battery charge and discharge control module.

[0016] Optionally, the auxiliary step-down circuit module includes a step-down circuit submodule or a charge pump circuit submodule.

[0017] Optionally, both the buck circuit module and the buck circuit submodule include:

[0018] The system comprises a first controller, a first input capacitor, a first output capacitor, an output inductor, and a first charging voltage and current controller, wherein the first controller includes a first transistor and a second transistor.

[0019] The battery information of the three-cell battery is transmitted to the first charging voltage and current controller. The first transistor and the output inductor are connected in series between the AC / DC adapter and the system power supply module. The first input capacitor is connected in series between the input terminal of the first transistor and ground. The first output capacitor is connected in series between the output terminal of the output inductor and ground. The input terminal of the second transistor is connected between the first transistor and the output inductor, and the other end is grounded.

[0020] During the charging phase of the output inductor, the first transistor is turned on and the second transistor is turned off.

[0021] During the discharge phase of the output inductor, the first transistor is turned off, and the second transistor is turned on.

[0022] Optionally, the charge pump circuit submodule includes: a first capacitor, a second capacitor, a third capacitor, a third transistor, a fourth transistor, a fifth transistor, and a sixth transistor;

[0023] The input terminal of the third transistor and one end of the third capacitor are connected to the AC / DC adapter, and the other end of the third capacitor is grounded. The output terminal of the third transistor and the input terminal of the fourth transistor are both connected to the first terminal of the first capacitor. The other end of the first capacitor is connected to the input terminal of the sixth transistor and the output terminal of the fifth transistor. The output terminal of the sixth transistor is grounded. The output terminal of the fourth transistor, the input terminal of the fifth transistor, and one end of the second capacitor are respectively connected to the first battery connector and the second battery connector. The other end of the second capacitor is grounded.

[0024] During the capacitor series connection phase, the third transistor and the fifth transistor are turned on, while the fourth transistor and the sixth transistor are turned off.

[0025] During the capacitor parallel connection phase, the fourth and sixth transistors are turned on, while the third and fifth transistors are turned off.

[0026] Optionally, the charge pump circuit submodule includes: a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a seventh transistor, an eighth transistor, a ninth transistor, a tenth transistor, an eleventh transistor, a twelfth transistor, and a thirteenth transistor.

[0027] One end of the fourth capacitor and the input terminal of the seventh transistor are both connected to the AC / DC adapter. The other end of the fourth capacitor is grounded. The output terminal of the seventh transistor and the input terminal of the eighth transistor are both connected to one end of the fifth capacitor. The other end of the fifth capacitor is connected to the output terminal of the ninth transistor and the input terminal of the tenth transistor. The input terminals of the ninth transistor and the thirteenth transistor are both grounded. The output terminal of the thirteenth transistor and the input terminal of the twelfth transistor are both connected to one end of the sixth capacitor. The other end of the sixth capacitor is connected to the output terminal of the tenth transistor and the input terminal of the eleventh transistor. The output terminals of the eighth transistor, the eleventh transistor, the twelfth transistor, and one end of the seventh capacitor are all electrically connected to the first battery connector and the second battery connector. The other end of the seventh capacitor is grounded.

[0028] During the capacitor series connection phase, the seventh, tenth, and twelfth transistors are turned on, while the eighth, ninth, eleventh, and thirteenth transistors are turned off.

[0029] During the capacitor parallel connection phase, the eighth, ninth, eleventh, and thirteenth transistors are turned on, while the seventh, tenth, and twelfth transistors are turned off.

[0030] Optionally, the boost circuit module includes: a second controller, a second input capacitor, a second output capacitor, an input inductor, and a second charging voltage and current controller, wherein the second controller includes a fourteenth transistor and a fifteenth transistor;

[0031] The battery information of the three-cell battery is transmitted to the second charging voltage and current controller. The input inductor and the fourteenth transistor are connected in series between the AC / DC adapter and the first or second battery connector of the three-cell battery. The second input capacitor is connected in series between the input terminal of the input inductor and ground. The second output capacitor is connected in series between the input terminal of the fourteenth transistor and ground. The input terminal of the fifteenth transistor is connected between the fourteenth transistor and the input inductor, and the other end is grounded.

[0032] During the charging phase of the input inductor, the fifteenth transistor is turned on, and the fourteenth transistor is turned off;

[0033] During the discharge phase of the input inductor, the fifteenth transistor is turned off, and the fourteenth transistor is turned on.

[0034] Optionally, the three-cell battery further includes a positive electrode and a negative electrode. The positive electrode includes at least a first positive electrode and a second positive electrode. The first positive electrode is electrically connected to a first battery connector via a first positive electrode tab, and the second positive electrode is electrically connected to a second battery connector via a second positive electrode tab.

[0035] The first positive electrode and the second positive electrode are insulated from each other.

[0036] In a second aspect, embodiments of this disclosure provide a power control method for a multi-tab battery, applied to a power control system for a multi-tab battery as described in any one of the first aspects, the method comprising:

[0037] The battery charge and discharge control module collects the charging voltage and charging current of the three-cell battery during the charging phase, and collects the discharging voltage and discharging current of the three-cell battery during the discharging phase. Based on the charging voltage, the charging current, the discharging voltage, and the discharging current, it determines the charging and discharging phase of the three-cell battery.

[0038] During the trickle charging phase, the battery charge / discharge control module controls the boost circuit module to open and operate;

[0039] During the constant current charging phase, the battery charge and discharge control module controls the charge pump circuit module and the step-down circuit module to turn on and operate, so that the current output by the charge pump circuit module is greater than the input current, and the voltage output by the charge pump circuit module is less than the input voltage.

[0040] During the constant voltage charging phase, the battery charge / discharge control module controls the charge pump circuit module to shut down, the boost circuit module to turn on, and the buck circuit module to turn on.

[0041] During the discharge phase, the battery charge / discharge control module controls the auxiliary step-down circuit module to open, so as to convert the discharge voltage of the three-cell battery into a voltage suitable for the system power supply module.

[0042] Thirdly, embodiments of this disclosure also provide an electronic device, the electronic device including a power control system for a multi-tab battery as described in any of the first aspects, or charging using a power control method for a multi-tab battery as described in the second aspect.

[0043] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0044] The power control system, method, and electronic device for multi-tab batteries provided in this disclosure, by configuring the battery to include at least a first battery connector and a second battery connector, reduces the current flowing through the battery connectors during charging by shunting the current through the first and second battery connectors, thereby reducing power loss in the battery connectors and improving charging efficiency. Furthermore, configuring the battery as a three-cell battery (i.e., three cells connected in series within one battery) allows for better high-power charging at the battery end. In addition, during the trickle charging, constant-voltage charging, and charging cutoff stages, the three-cell battery has a smaller charging current and generates less heat; therefore, a boost circuit module is used to charge the three-cell battery, resulting in a simple and flexible charging method. During the constant-current charging stage, a charge pump circuit module is used to charge the three-cell battery, improving charging efficiency, reducing charging time, and consequently reducing battery heat generation. During the charging phase, a step-down circuit module is used to convert the charging voltage to a voltage suitable for the system power supply module, preventing the battery from discharging simultaneously during charging and effectively protecting the battery. During the discharging phase, an auxiliary step-down circuit module converts the discharge voltage of the three-cell battery to a voltage suitable for the system power supply module and supplies power to the system power supply module, thus enabling the system power supply module to be powered during the battery charging process. Attached Figure Description

[0045] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0046] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the power control system of a multi-tab battery provided in an embodiment of this disclosure;

[0048] Figure 2 This is a schematic diagram of the power control system of another multi-tab battery provided in an embodiment of this disclosure;

[0049] Figure 3 This is a schematic diagram of the power control system of another multi-tab battery provided in this embodiment of the present disclosure;

[0050] Figure 4 This is a schematic diagram of a step-down circuit provided in an embodiment of the present disclosure;

[0051] Figure 5 This is a schematic diagram of another step-down circuit provided in an embodiment of this disclosure;

[0052] Figure 6 This is a schematic diagram of another step-down circuit provided in this embodiment;

[0053] Figure 7 This is a schematic diagram of the structure of a charge pump circuit submodule provided in an embodiment of this disclosure;

[0054] Figure 8 This is a schematic diagram of another charge pump circuit submodule provided in an embodiment of this disclosure;

[0055] Figure 9 This is a schematic diagram of the structure of another charge pump circuit submodule provided in this embodiment;

[0056] Figure 10 This is a schematic diagram of the structure of another charge pump circuit submodule provided in this embodiment;

[0057] Figure 11 This is a schematic diagram of the structure of another charge pump circuit submodule provided in this embodiment;

[0058] Figure 12 This is a schematic diagram of the structure of another charge pump circuit submodule provided in this embodiment;

[0059] Figure 13 This is a schematic diagram of the structure of a boost circuit module provided in an embodiment of this disclosure;

[0060] Figure 14 This is a schematic diagram of another boost circuit module provided in an embodiment of this disclosure;

[0061] Figure 15 This is a schematic diagram of another boost circuit module provided in the embodiments of this disclosure;

[0062] Figure 16 This is a schematic flowchart of a power control method for a multi-tab battery provided in an embodiment of the present disclosure.

[0063] Among them, 10 is the charging and discharging circuit; 20 is the three-cell battery; 30 is the AC / DC adapter; 21 is the battery connector; 211 is the first battery connector; 212 is the second battery connector; 110 is the boost circuit module; 120 is the buck circuit module; 130 is the charge pump circuit module; 140 is the auxiliary buck circuit module; 150 is the battery charging and discharging control module; 160 is the system power supply module; 135 is the charge pump circuit sub-module; 201 is the first controller; 202 is the first input capacitor; 203 is the first output capacitor; 204 is the output inductor; 205 is the first charging voltage and current controller; Q1 is the first transistor; Q2 is the second transistor; C1 is the first capacitor; C2, second capacitor; C3, third capacitor; Q3, third transistor; Q4, fourth transistor; Q5, fifth transistor; Q6, sixth transistor; C4, fourth capacitor; C5, fifth capacitor; C6, sixth capacitor; C7, seventh capacitor; Q7, seventh transistor; Q8, eighth transistor; Q9, ninth transistor; Q10, tenth transistor; Q11, eleventh transistor; Q12, twelfth transistor; Q13, thirteenth transistor; 301, second controller; 302, second input capacitor; 303, second output capacitor; 304, input inductor; 305, second charging voltage and current controller; Q14, fourteenth transistor; Q15, fifteenth transistor. Detailed Implementation

[0064] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0065] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0066] Figure 1 This is a schematic diagram of the power control system for a multi-tab battery provided in an embodiment of this disclosure, as shown below. Figure 1 As shown, the system includes a charging / discharging circuit 10 and a three-cell battery 20. The three-cell battery 20 includes a battery connector 21, which includes at least a first battery connector 211 and a second battery connector 212. The charging / discharging circuit 10 includes a boost circuit module 110, a buck circuit module 120, a charge pump circuit module 130, an auxiliary buck circuit module 140, a battery charging / discharging control module 150, and a system power supply module 160.

[0067] The AC / DC adapter 30 is electrically connected to the boost circuit module 110, the buck circuit module 120, and the charge pump circuit module 130, respectively. The battery charge / discharge control module 150 is electrically connected to the boost circuit module 110, the buck circuit module 120, the charge pump circuit module 130, the three-cell battery 20, and the auxiliary buck circuit module 140, respectively. The system power supply module 160 is electrically connected to the buck circuit module 120 and the auxiliary buck circuit module 140, respectively. The first battery connector 211 and the second battery connector 212 of the three-cell battery 20 are electrically connected to the boost circuit module 110 and the charge pump circuit module 130, respectively. The three-cell battery 30 is also electrically connected to the auxiliary buck circuit module 120.

[0068] The battery charge and discharge control module 150 is a control module that controls the boost circuit module 110, the buck circuit module 120, the charge pump circuit module 130, and the auxiliary buck circuit module 140 to work in the corresponding charge and discharge stages.

[0069] The boost circuit module 110 operates in the trickle charging stage, the constant voltage charging stage, and the charging cutoff stage; the charge pump circuit module 130 operates in the constant current charging stage, and is a circuit module that ensures that the current output by the charge pump circuit module 130 is greater than the input current and that the voltage output by the charge pump circuit module 130 is less than the input voltage; the buck circuit module 120 operates in the constant current charging stage, the constant voltage charging stage, and the charging cutoff stage, and is a circuit module that converts the charging voltage to a voltage suitable for the system power supply module 160; the auxiliary buck circuit module 140 operates in the discharging stage, and is a circuit module that converts the discharging voltage of the three-cell battery 20 to a voltage suitable for the system power supply module 160.

[0070] like Figure 1As shown, the three-cell battery 20 includes a first battery connector 211 and a second battery connector 212. The first battery connector 211 is electrically connected to the first positive electrode 231 in the battery cell through a first positive tab 221, and the second battery connector 212 is electrically connected to the second positive electrode 232 in the battery cell through a second positive tab 222. By setting the battery connectors of the three-cell battery 20 to include at least the first battery connector 211 and the second battery connector 212, when the charging current of the three-cell battery 20 is 10A, the current is shunted through the first battery connector 211 and the second battery connector 212, that is, the current through the first battery connector 211 and the current through the second battery connector 212 are 5A respectively, which reduces the current flowing through the battery connectors, reduces the power loss of the battery connectors, and improves the charging efficiency of the three-cell battery 20.

[0071] It should be noted that, Figure 1 The exemplary embodiment shows that the battery connector includes a first battery connector 211 and a second battery connector 212. In other possible embodiments, the battery connector may also include a first battery connector 211, a second battery connector 212, and a third battery connector 213, such as... Figure 2 As shown. When the three-cell battery 20 includes three battery connectors, the three-cell battery 20 is configured to include a positive electrode 23 and a negative electrode. The positive electrode 23 includes a first positive electrode 231, a second positive electrode 232, and a third positive electrode 233. The first battery connector 211 is electrically connected to the first positive electrode 231 through a first positive tab 221, the second battery connector 212 is electrically connected to the second positive electrode 232 through a second positive tab 222, and the third battery connector 213 is electrically connected to the third positive electrode 233 through a third positive tab 223. Furthermore, when the three-cell battery 20 includes four battery connectors, the three-cell battery 20 is configured to include a positive electrode 23 and a negative electrode. The positive electrode 23 includes a first positive electrode 231, a second positive electrode 232, a third positive electrode 233, and a fourth positive electrode. The first battery connector 211 is electrically connected to the first positive electrode 231 through a first positive tab 221. The second battery connector 212 is electrically connected to the second positive electrode 232 through a second positive tab 222. The third battery connector 213 is electrically connected to the third positive electrode 233 through a third positive tab 223. The fourth battery connector is electrically connected to the fourth positive electrode through a fourth positive tab. This embodiment does not specifically limit the number of battery connectors or the number of positive tabs.

[0072] By configuring the battery charging and discharging system with a three-cell battery 20 (i.e., three cells connected in series), the charging voltage of the three-cell battery 20 is 1.5 times that of a two-cell battery, and for the same charging power, the charging current of the three-cell battery 20 is 2 / 3 times that of the two-cell battery. For example, when the battery is fully charged at 13.5V and the charging power is 90W, the charging current of the three-cell battery 20 is 6.67A, while the charging current of the two-cell battery is 10A. Therefore, the charging current of the three-cell battery 20 is smaller than that of the two-cell battery, reducing heat generation on the battery circuit board, improving battery safety, and better enabling high-power charging of 100W, 120W, and above.

[0073] like Figure 1As shown, the charging and discharging circuit 10 includes a boost circuit module 110, a charge pump circuit module 130, and a battery charging and discharging control module 150. The battery charging and discharging control module 150 determines the operating state of the three-cell battery 20 based on the acquired voltage and / or current signals of the three-cell battery 20, and then outputs control signals to the boost circuit module 110 and the charge pump circuit module 130 to operate based on the acquired voltage and / or current signals of the three-cell battery 20. Specifically, when the three-cell battery 20 is in the trickle charging stage, constant voltage charging stage, and charging cutoff stage, since the charging current and heat generation of the three-cell battery 20 are relatively small, the boost circuit module 110 is used to charge the three-cell battery 20. At this time, the battery charge and discharge control module 150 outputs a control signal to the boost circuit module 110, controlling the boost circuit module 110 to convert the charging voltage received from the AC / DC adapter 30 into a voltage signal suitable for charging the three-cell battery and output it to the first battery connector 211 and the second battery connector 212 of the three-cell battery 20, thereby realizing the charging of the three-cell battery 20. The method of using the boost circuit module 110 to charge the three-cell battery 20 is simple and highly flexible. When the three-cell battery 20 is in the constant current charging stage, since the charging current of the three-cell battery 20 is relatively large during the constant current charging stage, using the charge pump circuit module 130 to charge the three-cell battery 20 can improve charging efficiency, reduce charging time, and thus reduce battery heat generation. Therefore, during the constant current charging stage, the charge pump circuit module 130 is selected to charge the three-cell battery 20. At this time, the battery charge and discharge control module 150 outputs a control signal to the charge pump circuit module 130, controlling the charge pump circuit module 130 to convert the charging voltage signal received from the AC / DC adapter 30 into a voltage signal suitable for charging the three-cell battery and output it to the first battery connector 211 and the second battery connector 212 of the three-cell battery 20, thereby realizing the charging of the three-cell battery 20 by the charge pump circuit module 130 during the constant current charging stage. For example, the charge pump circuit module 130 can be a 1 / 2 step-down charge pump, a 1 / 3 step-down charge pump, or a 1 / 4 step-down charge pump. When the charge pump circuit module 130 is a 1 / 2 step-down charge pump, the input voltage of the charge pump circuit module 130 is twice the output voltage, and the input current is half the output current. When the charge pump circuit module 130 is a 1 / 3 step-down charge pump, the input voltage of the charge pump circuit module 130 is three times the output voltage, and the input current is one-third of the output current. When the charge pump circuit module 130 is a 1 / 4 step-down charge pump, the input voltage of the charge pump circuit module 130 is four times the output voltage, and the input current is one-quarter of the output current.

[0074] Specifically, when the three-cell battery 20 is in the trickle charging stage, and the battery voltage is below approximately 9V, a constant current of up to 0.1C is generally used to charge the three-cell battery 20. The battery charge / discharge control module 150 first determines the type of the AC / DC adapter 30, such as Standard Downstream Port (SDP), Dedicated Charging Port (DCP), or Charging Downstream Port (CDP). When the battery charge / discharge control module 150 determines it is an SDP (connected to a computer's USB port for charging), the AC / DC adapter 30 outputs a 5V voltage signal. The battery charge / discharge control module 150 then controls the boost circuit module 110 to activate, allowing the three-cell battery 20 to undergo small-current charging. When the battery charge / discharge control module 150 determines it is a DCP, the AC / DC adapter 30 outputs a 5V voltage signal, and the battery charge / discharge control module 150 controls the boost circuit module 110 to activate, allowing the boost circuit module 110 to undergo small-current charging.

[0075] During the constant current charging phase, when the charging voltage of the three-cell battery 20 obtained by the battery charge / discharge control module 150 is greater than the set voltage threshold and the charging current is greater than the set current threshold, the battery charge / discharge control module 150 controls the charge pump circuit module 130 to be turned on, and the battery charge / discharge control module 150 communicates with the AC / DC adapter 30 via a boost control protocol, controlling the AC / DC adapter 30 to output dynamic voltage and dynamic current to the charge pump circuit module 130. At this time, the charge pump circuit module 130 performs high-current charging.

[0076] During constant voltage charging and subsequent charging cutoff phases, when the charging current is less than the set current threshold, the battery charge / discharge control module 150 does not need to establish a boost control protocol with the AC / DC adapter 30. Instead, the battery charge / discharge control module 150 controls the AC / DC adapter 30 to output a voltage value lower than the battery voltage, such as 5V or 6V. The battery charge / discharge control module 150 then controls the boost circuit module 110 to open and the charge pump circuit module 130 to close.

[0077] In addition, the charging and discharging circuit 10 also includes a step-down circuit module 120, an auxiliary step-down circuit module 140, and a system power supply module 160. The step-down circuit module 120 and the auxiliary step-down circuit module 140 are electrically connected to the battery charging and discharging control module 150, respectively. When the three-cell battery 20 is in the constant current charging stage, the constant voltage charging stage, and the charging cutoff stage, the battery charging and discharging control module 150 outputs a control signal to the step-down circuit module 120, controlling the step-down circuit module 120 to convert the charging voltage received from the external AC / DC adapter 30 into a voltage suitable for the system power supply module 160, and supply power to the system power supply module 160. This enables the system power supply module 160 to supply power to other modules in the battery charging and discharging system during the charging stage of the three-cell battery 20, which can prevent the three-cell battery 20 from discharging at the same time during the charging process, effectively protecting the battery. When the three-cell battery 20 is in the discharge stage, the battery charge and discharge control module 150 outputs a control signal to the auxiliary step-down circuit module 140, which controls the auxiliary step-down circuit module 140 to convert the discharge voltage of the three-cell battery 20 into a voltage suitable for the system power supply module 160, and supplies power to the system power supply module 160, so that the system power supply module 160 supplies power to other modules in the battery charge and discharge system during the discharge stage of the three-cell battery 20.

[0078] The power control system for the multi-tab battery provided in this embodiment of the invention includes at least a first battery connector 211 and a second battery connector 212. When charging the battery, current is shunted between the first and second battery connectors 211 and 212, reducing the current flowing through the battery connectors, lowering power loss, and improving charging efficiency. Furthermore, the battery is configured as a three-cell battery 20, meaning three cells are connected in series, which better enables high-power charging at the battery end. In addition, during the trickle charging, constant voltage charging, and charging cutoff stages, the charging current and heat generation of the three-cell battery 20 are relatively small. Therefore, a boost circuit module 110 is used to charge the three-cell battery 20, resulting in a simple and flexible charging method. During the constant current charging stage, a charge pump circuit module 130 is used to charge the three-cell battery 20, improving charging efficiency, reducing charging time, and thus reducing battery heat generation. During the charging phase, a step-down circuit module 120 is used to convert the charging voltage to a voltage suitable for the system power supply module 160, preventing the battery from discharging simultaneously during charging and effectively protecting the battery. During the discharging phase, an auxiliary step-down circuit module 140 is used to convert the discharging voltage of the three-cell battery 20 to a voltage suitable for the system power supply module 160 and supply power to the system power supply module 160, thus enabling the system power supply module 160 to be powered during the battery discharge process.

[0079] Figure 3 This is a schematic diagram of the power control system for another multi-tab battery provided in this disclosure embodiment, as shown below. Figure 3 As shown, the charge pump circuit module 130 includes N charge pump circuit sub-modules 135 connected in parallel; N≥1 and is an integer; the N charge pump circuit sub-modules 135 are respectively connected to the battery charge and discharge control module 150.

[0080] By setting the charge pump circuit module 130 to include N charge pump circuit sub-modules 135 connected in parallel, when the three-cell battery 20 is in the constant current charging stage, the battery charge and discharge control module 150 controls the number of charge pump circuit sub-modules 135 to be turned on according to the obtained charging voltage and charging current of the three-cell battery 20, thereby improving the power conversion efficiency in the entire charging scheme and reducing the heating phenomenon of the battery end circuit board.

[0081] For example, when the charging current of the three-cell battery 20 is 4-5A, one charge pump circuit submodule 135 is controlled to be turned on; when the charging current of the three-cell battery 20 is 8-10A, two charge pump circuit submodules 135 are controlled to be turned on, with each charge pump electronic module receiving 4-5A of current; when the charging current of the three-cell battery 20 is 20A, four charge pump circuit submodules 135 are controlled to be turned on, with each charge pump electronic module receiving 5A of current. When each charge pump circuit submodule receives 4-5A of current, the heat generated by the charging and discharging circuit 10 can be reduced, thus improving the charging and discharging efficiency of the charging and discharging circuit 10.

[0082] Optionally, the auxiliary step-down circuit module 140 may include a step-down circuit submodule or a charge pump circuit submodule 135.

[0083] The auxiliary step-down circuit module 140 is used to convert the discharge voltage of the three-cell battery 20 into a voltage suitable for the system power supply module 160 when the three-cell battery 20 is in the discharge stage, and to supply power to the system power supply module 160, so that the system power supply module 160 can supply power to other modules in the battery charging and discharging system during the discharge stage of the three-cell battery 20. By setting the auxiliary step-down circuit module 140 to include a step-down circuit submodule or a charge pump circuit submodule 135, the discharge voltage of the three-cell battery 20 is converted into a voltage suitable for the system power supply module 160 through the step-down circuit submodule or the charge pump circuit submodule 135.

[0084] Figure 4 This is a schematic diagram of a step-down circuit provided in an embodiment of the present disclosure. The embodiments of the present disclosure are based on the above embodiments, such as... Figure 4As shown, the buck circuit module 120 or buck circuit sub-module includes: a first controller 201, a first input capacitor 202, a first output capacitor 203, an output inductor 204, and a first charging voltage and current controller 205. The first controller 201 includes a first transistor Q1 and a second transistor Q2. The battery information of the three-cell battery 20 is transmitted to the first charging voltage and current controller 205. The first transistor Q1 and the output inductor 204 are connected in series between the AC / DC adapter 30 and the system power supply module 160. The first input capacitor 202 is connected in series between the input terminal of the first transistor Q1 and ground. The first output capacitor 203 is connected in series between the output terminal of the output inductor 204 and ground. The input terminal of the second transistor Q2 is connected between the first transistor Q1 and the output inductor 204, and the other end is grounded. During the charging phase of the output inductor 204, the first transistor Q1 is turned on and the second transistor Q2 is turned off. During the discharging phase of the output inductor 204, the first transistor Q1 is turned off and the second transistor Q2 is turned on.

[0085] like Figure 4 As shown, the buck circuit module 120 or buck circuit sub-module includes: a first controller 201, a first input capacitor 202, a first output capacitor 203, an output inductor 204, and a first charging voltage and current controller 205. The first controller 201, the first input capacitor 202, the first output capacitor 203, and the output inductor 204 constitute a Buck circuit. When the three-cell battery 20 is in the charging stage, the buck circuit module 120 provides the system power supply module 160 with a voltage suitable for the system power supply module 160.

[0086] Specifically, the working principle of the step-down circuit module 120 or the step-down circuit sub-module is as follows: during the charging phase of the output inductor 204, such as Figure 5 As shown, when the first transistor Q1 is turned on and the second transistor Q2 is turned off, the output inductor 204 is charged. The first transistor Q1, the output inductor 204, and the system power supply module 160 form the main circuit, and the main current of the circuit flows through the first transistor Q1, the output inductor 204, and the system power supply module 160. During the discharge phase of the output inductor 204, the first transistor Q1 is turned off and the second transistor Q2 is turned on, the output inductor 204 discharges, and the second transistor Q2, the output inductor 204, and the system power supply module 160 form the main circuit, and the main current of the circuit flows through the second transistor Q2, the output inductor 204, and the system power supply module 160.

[0087] Figure 7 This is a schematic diagram of the structure of a charge pump circuit submodule provided in an embodiment of this disclosure, as shown below. Figure 7As shown, the charge pump circuit submodule 135 includes: a first capacitor C1, a second capacitor C2, a third capacitor C3, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, and a sixth transistor Q6; the input terminal of the third transistor Q3 and one end of the third capacitor C3 are connected to the AC / DC adapter 30, and the other end of the third capacitor C3 is grounded; the output terminal of the third transistor Q3 and the input terminal of the fourth transistor Q4 are both connected to the first terminal of the first capacitor C1; the other end of the first capacitor C1 is connected to the input terminal of the sixth transistor Q6 and the output terminal of the fifth transistor Q5; the output terminal of the sixth transistor Q6 is grounded; the output terminal of the fourth transistor Q4, the input terminal of the fifth transistor Q5, and one end of the second capacitor C2 are electrically connected to the first battery connector 211 and the second battery connector 212, respectively; the other end of the second capacitor C2 is grounded; in the capacitor series connection stage, the third transistor Q3 and the fifth transistor Q5 are turned on, and the fourth transistor Q4 and the sixth transistor Q6 are turned off; in the capacitor parallel connection stage, the fourth transistor Q4 and the sixth transistor Q6 are turned on, and the third transistor Q3 and the fifth transistor Q5 are turned off.

[0088] like Figure 7 As shown, the charge pump circuit submodule 135 achieves voltage reduction by switching between the first capacitor C1 and the second capacitor C2. Since there are no inductors in the charge pump circuit submodule 135, there is no energy loss due to inductance, which makes the battery charging and discharging circuit 10 more efficient, quieter, and less electromagnetic interference.

[0089] Figure 7 An exemplary schematic diagram of a charge pump circuit submodule as a 1 / 2x step-down charge pump is provided. The 1 / 2x step-down charge pump consists of a first capacitor C1, a second capacitor C2, a third capacitor C3, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, and a sixth transistor Q6. By controlling the on / off states of the third transistor Q3, fourth transistor Q4, fifth transistor Q5, and sixth transistor Q6, the first capacitor C1 and the second capacitor C2 are connected in series and in parallel. This results in the input voltage of the charge pump circuit module 130 being twice the output voltage, and the input current being half the output current. Specifically, as shown... Figure 8 As shown, the input voltage of the 1 / 2 step-down charge pump is VIN, and the input current is I. When the third transistor Q3 and the fifth transistor Q5 are turned on, and the fourth transistor Q4 and the sixth transistor Q6 are turned off, the first capacitor C1 and the second capacitor C2 are connected in series. The voltage of the first capacitor C1 is approximately equal to VIN / 2, and the voltage of the second capacitor C2 is approximately equal to VIN / 2. At this time, the charging voltage output by the charge pump circuit module 130 to the first battery connector 211 and the second battery connector 212 is VIN / 2. Figure 9As shown, when the fourth transistor Q4 and the sixth transistor Q6 are turned on, the third transistor Q3 and the fifth transistor Q5 are turned off, and the first capacitor C1 and the second capacitor C2 are connected in parallel, the charging current output by the charge pump circuit module 130 to the first battery connector 211 and the second battery connector 212 is 2I, so that the input voltage of the charge pump circuit module 130 is twice the output voltage and the input current is half the output current.

[0090] Figure 10 This is a schematic diagram of the structure of another charge pump circuit submodule provided in this disclosure embodiment, such as... Figure 10 As shown, the charge pump circuit submodule 135 includes: a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a seventh transistor Q7, an eighth transistor Q8, a ninth transistor Q9, a tenth transistor Q10, an eleventh transistor Q11, a twelfth transistor Q12, and a thirteenth transistor Q13; one end of the fourth capacitor C4 and the input end of the seventh transistor Q7 are both connected to the AC / DC adapter 30, and the other end of the fourth capacitor C4 is grounded; the output end of the seventh transistor Q7 and the input end of the eighth transistor Q8 are both connected to one end of the fifth capacitor C5, and the other end of the fifth capacitor C5 is connected to the output of the ninth transistor Q9. The input terminals of the tenth transistor Q10, the ninth transistor Q9, and the thirteenth transistor Q13 are all grounded. The output terminal of the thirteenth transistor Q13 and the input terminal of the twelfth transistor Q12 are both connected to one end of the sixth capacitor C6. The other end of the sixth capacitor C6 is connected to the output terminal of the tenth transistor Q10 and the input terminal of the eleventh transistor Q11. The output terminals of the eighth transistor Q8, the eleventh transistor Q11, and the twelfth transistor Q12, as well as one end of the seventh capacitor C7, are all electrically connected to the first battery connector 211 and the second battery connector 212. The other end of the seventh capacitor C7 is grounded.

[0091] During the capacitor series connection phase, transistors Q7 (7th), Q10 (10th), and Q12 (12th) are turned on, while transistors Q8 (8th), Q9 (9th), Q11 (11th), and Q13 (13th) are turned off. During the capacitor parallel connection phase, transistors Q8 (8th), Q9 (9th), Q11 (11th), and Q13 (13th) are turned on, while transistors Q7 (7th), Q10 (10th), and Q12 (12th) are turned off.

[0092] Figure 10An exemplary schematic diagram of a charge pump circuit submodule as a 1 / 3 step-down charge pump is provided. This 1 / 3 step-down charge pump consists of a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a seventh transistor Q7, an eighth transistor Q8, a ninth transistor Q9, a tenth transistor Q10, an eleventh transistor Q11, a twelfth transistor Q12, and a thirteenth transistor Q13. By controlling the on / off states of the seventh transistor Q7, eighth transistor Q8, ninth transistor Q9, tenth transistor Q10, eleventh transistor Q11, twelfth transistor Q12, and thirteenth transistor Q13, the series and parallel connections of the fifth capacitor C5, sixth capacitor C6, and seventh capacitor C7 are achieved. This results in the charge pump circuit module 130 having an input voltage three times its output voltage and an input current one-third of its output current. Specifically, as shown... Figure 11 As shown, the input voltage of the 1 / 3 step-down charge pump is VIN, and the input current is I. When the seventh transistor Q7, the tenth transistor Q10, and the twelfth transistor Q12 are turned on, and the eighth transistor Q8, the ninth transistor Q9, the eleventh transistor Q11, and the thirteenth transistor Q13 are turned off, the fifth capacitor C5, the sixth capacitor C6, and the seventh capacitor C7 are connected in series. At this time, the charging voltage output by the charge pump circuit module 130 to the first battery connector 211 and the second battery connector 212 is VIN / 3. Figure 12 As shown, when the eighth transistor Q8, the ninth transistor Q9, the eleventh transistor Q11, and the thirteenth transistor Q13 are turned on, and the seventh transistor Q7, the tenth transistor Q10, and the twelfth transistor Q12 are turned off, the fifth capacitor C5, the sixth capacitor C6, and the seventh capacitor C7 are connected in parallel. At this time, the charging current output by the charge pump circuit module 130 to the first battery connector 211 and the second battery connector 212 is 3I, so that the input voltage of the charge pump circuit module 130 is 3 times the output voltage and the input current is 1 / 3 times the output current.

[0093] It should be noted that the above embodiments are exemplified by using a 1 / 2x step-down charge pump and a 1 / 3x step-down charge pump as examples. In addition, the charge pump circuit submodule 135 can also be a 1 / 4x step-down charge pump. The specific working principle is the same as that of the 1 / 2x step-down charge pump and the 1 / 3x step-down charge pump. This disclosure does not specifically limit the embodiments in this way.

[0094] Figure 13 This is a schematic diagram of a boost circuit module provided in an embodiment of the present disclosure. This embodiment is based on the above embodiments, such as... Figure 13As shown, the boost circuit module 110 includes: a second controller 301, a second input capacitor 302, a second output capacitor 303, an input inductor 304, and a second charging voltage and current controller 305. The second controller 301 includes a fourteenth transistor Q14 and a fifteenth transistor Q15. The battery information of the three-cell battery 20 is transmitted to the second charging voltage and current controller 305. The input inductor 304 and the fourteenth transistor Q14 are connected in series between the AC / DC adapter 30 and the first battery connector 211 or the second battery connector 212 of the three-cell battery 20. The second input capacitor 302 is connected in series between the input terminal of the input inductor 304 and ground. The second output capacitor 303 is connected in series between the input terminal of the fourteenth transistor Q14 and ground. The input terminal of the fifteenth transistor Q15 is connected between the fourteenth transistor Q14 and the input inductor 304, and the other end is grounded.

[0095] During the charging phase of the input inductor 304, the fifteenth transistor Q15 is turned on and the fourteenth transistor Q14 is turned off. During the discharging phase of the input inductor 304, the fifteenth transistor Q15 is turned off and the fourteenth transistor Q14 is turned on.

[0096] When the three-cell battery 20 is in the trickle charging stage, constant voltage charging stage, and charging cutoff stage, because the charging current and heat generation of the three-cell battery 20 are relatively small, a boost circuit module 110 is used to charge the three-cell battery 20. Specifically, the working process of the boost circuit module 110 is as follows: during the charging stage of the input inductor 304, such as... Figure 14 As shown, the fifteenth transistor Q15 is turned on, the fourteenth transistor Q14 is turned off, and the input inductor 304 is charged. During the discharge phase of the input inductor 304, as... Figure 15 As shown, the fifteenth transistor Q15 is off, the fourteenth transistor Q14 is on, and the input inductor 304 discharges to provide charging voltage and charging current for the three-cell battery 20.

[0097] In the power control system of the multi-tab battery provided in the above embodiments of this disclosure, the trickle charging stage is when the voltage of the three-cell battery is below 3V, and the three-cell battery is trickle charged with a current of 0.1C. When the voltage of the three-cell battery is above 3V, constant current charging is entered, and the three-cell battery is charged with a large current. When the battery capacity of the three-cell battery reaches 80% SOC, the constant voltage charging stage is entered until the battery capacity of the three-cell battery reaches 100% SOC. Then, the constant voltage charging is cut off, and the charging cutoff stage is entered. In the charging cutoff stage, since the three-cell battery will have partial discharge, it is charged with a small current to ensure that the battery is in a fully charged state.

[0098] Figure 16 This is a schematic flowchart illustrating a power control method for a multi-tab battery according to an embodiment of this disclosure, as shown below. Figure 16As shown, the method includes:

[0099] S10 The battery charging and discharging control module collects the charging voltage and charging current of the three-cell battery during the charging stage, and collects the discharging voltage and discharging current of the three-cell battery during the discharging stage. Based on the charging voltage, charging current, discharging voltage and discharging current, it determines the charging and discharging stage of the three-cell battery.

[0100] S20. During the trickle charging stage, the battery charge / discharge control module controls the boost circuit module to open and operate.

[0101] When the three-cell battery is in the trickle charging stage, because the charging current and heat generation of the three-cell battery are relatively small, a boost circuit module is used to charge the three-cell battery. At this time, the battery charge and discharge control module outputs a control signal to the boost circuit module, which controls the boost circuit module to convert the charging voltage received from the AC / DC adapter into a voltage signal suitable for charging the three-cell battery and outputs it to the first and second battery connectors of the three-cell battery to realize the charging of the three-cell battery. The boost circuit module is used to realize trickle charging of the three-cell battery.

[0102] S30. During the constant current charging stage, the battery charge / discharge control module controls the charge pump circuit module and the step-down circuit module to turn on and operate, so that the current output by the charge pump circuit module is greater than the input current, and the voltage output by the charge pump circuit module is less than the input voltage.

[0103] When the three-cell battery is in the constant current charging stage, due to the relatively large charging current, using a charge pump circuit module can improve charging efficiency, reduce charging time, and thus reduce battery heat generation. Therefore, the charge pump circuit module is selected to charge the three-cell battery during the constant current charging stage. At this time, the battery charge / discharge control module outputs a control signal to the charge pump circuit module, controlling the charge pump circuit module to convert the charging voltage signal received from the AC / DC adapter into a voltage signal suitable for charging the three-cell battery and output it to the first and second battery connectors of the three-cell battery, thereby achieving constant current charging of the three-cell battery.

[0104] In addition, during the constant current charging stage, the battery charge and discharge control module controls the step-down circuit module to turn on, and controls the step-down circuit module to convert the charging voltage received from the external AC / DC adapter into a voltage suitable for the system power supply module, and then supply power to the system power supply module. This enables the system power supply module to supply power to other modules in the battery charge and discharge system during the charging stage of the three-cell battery, which can prevent the three-cell battery from discharging at the same time during the charging process, and effectively protect the battery.

[0105] S40. During the constant voltage charging stage, the battery charge / discharge control module controls the charge pump circuit module to shut down, the boost circuit module to turn on, and the buck circuit module to turn on.

[0106] After the three-cell battery completes the constant current charging stage, it enters the constant voltage charging stage. Since the charging current is relatively small during the constant voltage charging stage, the battery charge and discharge control module controls the buck circuit module to shut down and the boost circuit module to open. The boost circuit module converts the charging voltage received from the AC / DC adapter into a voltage signal suitable for charging the three-cell battery and outputs it to the first and second battery connectors of the three-cell battery, thereby achieving constant voltage charging of the three-cell battery.

[0107] In addition, during the constant current charging and constant voltage charging phases of the three-cell battery, the battery charge and discharge control module outputs control signals to the step-down circuit module, which then converts the charging voltage received from the external AC / DC adapter into a voltage suitable for the system power supply module and supplies power to it. This enables the system power supply module to supply power to other modules in the battery charge and discharge system during the charging phase of the three-cell battery, preventing the three-cell battery from discharging simultaneously during the charging process and effectively protecting the battery.

[0108] S50. During the discharge phase, the battery charge / discharge control module controls the auxiliary step-down circuit module to open, so as to convert the discharge voltage of the three-cell battery into a voltage suitable for the system power supply module.

[0109] When the three-cell battery is in the discharge stage, the battery charge and discharge control module outputs a control signal to the auxiliary step-down circuit module, which controls the auxiliary step-down circuit module to convert the discharge voltage of the three-cell battery into a voltage suitable for the system power supply module, and then supplies power to the system power supply module, so that the system power supply module can supply power to other modules in the battery charge and discharge system during the discharge stage of the three-cell battery.

[0110] This disclosure also provides an electronic device, which includes the system described in any of the above embodiments, or is charged using the method described in any of the above embodiments, and has the beneficial effects of the system and the method provided in the above embodiments.

[0111] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0112] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power control system for a multi-tab battery, characterized in that, Includes charging and discharging circuits and a three-cell battery; The three-cell battery includes a battery connector, which includes at least a first battery connector and a second battery connector. The charging and discharging circuit includes a boost circuit module, a buck circuit module, a charge pump circuit module, an auxiliary buck circuit module, a battery charging and discharging control module, and a system power supply module. The AC / DC adapter is electrically connected to the boost circuit module, the buck circuit module, and the charge pump circuit module, respectively. The battery charge / discharge control module is electrically connected to the boost circuit module, the buck circuit module, the charge pump circuit module, the three-cell battery, and the auxiliary buck circuit module, respectively. The system power supply module is electrically connected to the buck circuit module and the auxiliary buck circuit module, respectively. The first battery connector and the second battery connector of the three-cell battery are electrically connected to the boost circuit module and the charge pump circuit module, respectively. The three-cell battery is also electrically connected to the auxiliary buck circuit module. The battery charge and discharge control module is a control module that controls the boost circuit module, the buck circuit module, the charge pump circuit module, and the auxiliary buck circuit module to work in the corresponding charge and discharge stages. The boost circuit module operates in the trickle charging stage, the constant voltage charging stage, and the charging cutoff stage. The charge pump circuit module operates in the constant current charging stage, and is a circuit module that ensures that the current output by the charge pump circuit module is greater than the input current and that the voltage output by the charge pump circuit module is less than the input voltage. The step-down circuit module operates in a constant current charging stage, a constant voltage charging stage, and a charging cutoff stage. It is a circuit module that converts the charging voltage into a voltage suitable for the power supply module of the system. The auxiliary step-down circuit module operates during the discharge phase and is a circuit module that converts the discharge voltage of the three-cell battery into a voltage suitable for the system power supply module.

2. The system according to claim 1, characterized in that, The charge pump circuit module includes N charge pump circuit sub-modules connected in parallel; N≥1 and is an integer; The N charge pump circuit submodules are respectively connected to the battery charge and discharge control module.

3. The system according to claim 1, characterized in that, The auxiliary step-down circuit module includes a step-down circuit submodule or a charge pump circuit submodule.

4. The system according to claim 3, characterized in that, Both the step-down circuit module and the step-down circuit sub-module include: The system comprises a first controller, a first input capacitor, a first output capacitor, an output inductor, and a first charging voltage and current controller, wherein the first controller includes a first transistor and a second transistor. The battery information of the three-cell battery is transmitted to the first charging voltage and current controller. The first transistor and the output inductor are connected in series between the AC / DC adapter and the system power supply module. The first input capacitor is connected in series between the input terminal of the first transistor and ground. The first output capacitor is connected in series between the output terminal of the output inductor and ground. The input terminal of the second transistor is connected between the first transistor and the output inductor, and the other end is grounded. During the charging phase of the output inductor, the first transistor is turned on and the second transistor is turned off. During the discharge phase of the output inductor, the first transistor is turned off, and the second transistor is turned on.

5. The system according to claim 2 or 3, characterized in that, The charge pump circuit submodule includes: a first capacitor, a second capacitor, a third capacitor, a third transistor, a fourth transistor, a fifth transistor, and a sixth transistor; The input terminal of the third transistor and one end of the third capacitor are connected to the AC / DC adapter, and the other end of the third capacitor is grounded. The output terminal of the third transistor and the input terminal of the fourth transistor are both connected to the first terminal of the first capacitor. The other end of the first capacitor is connected to the input terminal of the sixth transistor and the output terminal of the fifth transistor. The output terminal of the sixth transistor is grounded. The output terminal of the fourth transistor, the input terminal of the fifth transistor, and one end of the second capacitor are respectively connected to the first battery connector and the second battery connector. The other end of the second capacitor is grounded. During the capacitor series connection phase, the third transistor and the fifth transistor are turned on, while the fourth transistor and the sixth transistor are turned off. During the capacitor parallel connection phase, the fourth and sixth transistors are turned on, while the third and fifth transistors are turned off.

6. The system according to claim 2 or 3, characterized in that, The charge pump circuit submodule includes: a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a seventh transistor, an eighth transistor, a ninth transistor, a tenth transistor, an eleventh transistor, a twelfth transistor, and a thirteenth transistor; One end of the fourth capacitor and the input terminal of the seventh transistor are both connected to the AC / DC adapter. The other end of the fourth capacitor is grounded. The output terminal of the seventh transistor and the input terminal of the eighth transistor are both connected to one end of the fifth capacitor. The other end of the fifth capacitor is connected to the output terminal of the ninth transistor and the input terminal of the tenth transistor. The input terminals of the ninth transistor and the thirteenth transistor are both grounded. The output terminal of the thirteenth transistor and the input terminal of the twelfth transistor are both connected to one end of the sixth capacitor. The other end of the sixth capacitor is connected to the output terminal of the tenth transistor and the input terminal of the eleventh transistor. The output terminals of the eighth transistor, the eleventh transistor, the twelfth transistor, and one end of the seventh capacitor are all electrically connected to the first battery connector and the second battery connector. The other end of the seventh capacitor is grounded. During the capacitor series connection phase, the seventh, tenth, and twelfth transistors are turned on, while the eighth, ninth, eleventh, and thirteenth transistors are turned off. During the capacitor parallel connection phase, the eighth, ninth, eleventh, and thirteenth transistors are turned on, while the seventh, tenth, and twelfth transistors are turned off.

7. The system according to claim 1, characterized in that, The boost circuit module includes: a second controller, a second input capacitor, a second output capacitor, an input inductor, and a second charging voltage and current controller, wherein the second controller includes a fourteenth transistor and a fifteenth transistor; The battery information of the three-cell battery is transmitted to the second charging voltage and current controller. The input inductor and the fourteenth transistor are connected in series between the AC / DC adapter and the first or second battery connector of the three-cell battery. The second input capacitor is connected in series between the input terminal of the input inductor and ground. The second output capacitor is connected in series between the input terminal of the fourteenth transistor and ground. The input terminal of the fifteenth transistor is connected between the fourteenth transistor and the input inductor, and the other end is grounded. During the charging phase of the input inductor, the fifteenth transistor is turned on, and the fourteenth transistor is turned off; During the discharge phase of the input inductor, the fifteenth transistor is turned off, and the fourteenth transistor is turned on.

8. The system according to claim 1, characterized in that, The three-cell battery also includes a positive electrode and a negative electrode. The positive electrode includes at least a first positive electrode and a second positive electrode. The first positive electrode is electrically connected to a first battery connector through a first positive electrode tab, and the second positive electrode is electrically connected to a second battery connector through a second positive electrode tab. The first positive electrode and the second positive electrode are insulated from each other.

9. A power control method for a multi-tab battery, characterized in that, The method, applied to the charging and discharging system according to any one of claims 1-8, comprises: The battery charge and discharge control module collects the charging voltage and charging current of the three-cell battery during the charging phase, and collects the discharging voltage and discharging current of the three-cell battery during the discharging phase. Based on the charging voltage, the charging current, the discharging voltage, and the discharging current, it determines the charging and discharging phase of the three-cell battery. During the trickle charging phase, the battery charge / discharge control module controls the boost circuit module to open and operate; During the constant current charging phase, the battery charge and discharge control module controls the charge pump circuit module and the step-down circuit module to turn on and operate, so that the current output by the charge pump circuit module is greater than the input current, and the voltage output by the charge pump circuit module is less than the input voltage. During the constant voltage charging phase, the battery charge / discharge control module controls the charge pump circuit module to shut down, the boost circuit module to turn on, and the buck circuit module to turn on. During the discharge phase, the battery charge / discharge control module controls the auxiliary step-down circuit module to open, so as to convert the discharge voltage of the three-cell battery into a voltage suitable for the system power supply module.

10. An electronic device, characterized in that, The electronic device includes the system according to any one of claims 1-8, or is charged using the method of claim 9.

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