Dual battery management circuit, dual battery management system and notebook computer

Abstract

This application discloses a dual-battery management circuit, a dual-battery management system, and a laptop computer, relating to the field of battery management technology. The circuit includes: an interface module, a switching module, and a control module. The switching module is connected to the interface module, the control module, and a load. The interface module is connected to the control module, a first battery, and a second battery. The control module acquires first battery power information and transmits a switching command to the switching module when the first battery power information exceeds a power switching threshold. The switching module controls the first and second batteries to simultaneously supply power to the load within a preset period, and disconnects the power supply circuit between the first battery and the load after the preset period. Compared to existing technologies, this application improves the laptop's battery life and the reliability and security of power management through seamless switching between the two batteries.

Description

Technical Field

[0001] This application relates to the field of battery management technology, and more particularly to a dual-battery management circuit, a dual-battery management system, and a laptop computer. Background Technology

[0002] With the increasing prevalence of mobile work, users have placed higher demands on the battery life and uninterrupted work capabilities of laptops. Especially in scenarios such as high-performance computing and outdoor work, the capacity of a single built-in battery is insufficient for extended use. Currently, the mainstream solution in the industry is to maximize the energy density of a single battery to increase capacity, but this is limited by the physical size of laptops and safety regulations, and the potential for improvement is nearing its limit. Another approach to enhancing battery life is to equip the device with dual batteries and allow users to swap batteries without shutting down the device (hot-swapping). However, implementing this feature faces key technical challenges: the system power supply must remain continuous and stable the instant one battery is removed and another is connected, while precisely managing the charging and discharging paths to prevent harmful cross-charging between the two batteries, avoiding energy loss and safety risks.

[0003] Therefore, how to achieve seamless and safe switching between dual batteries during charging and discharging, and effectively prevent mutual charging between batteries, is an urgent problem to be solved. Summary of the Invention

[0004] The main purpose of this application is to provide a dual-battery management circuit, a dual-battery management system, and a laptop computer, aiming to solve the technical problem of how to achieve seamless and safe switching between dual batteries during charging and discharging, and effectively prevent mutual charging between batteries.

[0005] To achieve the above objectives, this application proposes a dual-battery management circuit, which includes: an interface module, a switching module, and a control module;

[0006] The switching module is connected to the interface module, the control module, and the load, respectively; the interface module is connected to the control module, the first battery, and the second battery, respectively. The control module is used to acquire the first power information of the first battery, and when the first power information exceeds the power switching threshold, transmit a switching command to the switching module; The switching module is configured to control the first battery and the second battery to simultaneously supply power to the load within a preset period according to the switching instruction, and to disconnect the power supply circuit between the first battery and the load after the preset period.

[0007] In one embodiment, the control module is further configured to acquire second battery power information; The control module is further configured to determine the power switching threshold based on the comparison result of the first power information and the second power information.

[0008] In one embodiment, the interface module includes: a first battery interface and a second battery interface; The first battery interface is connected to the switching module and the first battery respectively, and is used to conduct the circuit between the first battery and the switching module; The first battery interface is also used to transmit the received first power information to the control module; The second battery interface is connected to both the switching module and the second battery, and is used to establish a circuit between the second battery and the switching module. The second battery interface is also used to transmit the received second battery power information to the control module.

[0009] In one embodiment, the switching module includes: a first switching unit and a second switching unit; The first switching unit is connected between the interface module and the load, and is used to control the on / off state of the power supply circuit between the first battery and the load; The second switching unit is connected between the interface module and the load, and is used to control the on / off state of the power supply circuit between the second battery and the load; The control terminals of both the first and second switching units are connected to the control module to receive the switching command.

[0010] In one embodiment, the first switching unit includes: a first PMOS transistor and a second PMOS transistor; The source of the first PMOS transistor is connected to the interface module, the drain of the first PMOS transistor is connected to the load, and the gate of the first PMOS transistor is connected to the control module. The source of the second PMOS transistor is connected to the load, the drain of the second PMOS transistor is connected to the interface module, and the gate of the second PMOS transistor is connected to the control module.

[0011] In one embodiment, the second switching unit includes a third PMOS transistor and a fourth PMOS transistor; The source of the third PMOS transistor is connected to the interface module, the drain of the third PMOS transistor is connected to the load, and the gate of the third PMOS transistor is connected to the control module. The source of the fourth PMOS transistor is connected to the load, the drain of the fourth PMOS transistor is connected to the interface module, and the gate of the fourth PMOS transistor is connected to the control module.

[0012] In one embodiment, the circuit further includes: a power supply module; The input terminal of the power supply module is connected to the switching module, and the output terminal of the power supply module is connected to the control module to provide operating voltage to the control module.

[0013] In one embodiment, the power supply module includes: a unidirectional conduction unit and a voltage regulator unit; The input terminal of the unidirectional conduction unit is connected to the switching module, the output terminal of the unidirectional conduction unit is connected to the input terminal of the voltage regulator unit, and the output terminal of the voltage regulator unit is connected to the control module.

[0014] In addition, to achieve the above objectives, this application also proposes a dual-battery management system, which includes the dual-battery management circuit as described above.

[0015] In addition, to achieve the above objectives, this application also proposes a laptop computer that includes the dual-battery management system described above.

[0016] This application proposes a dual-battery management circuit, which includes an interface module, a switching module, and a control module. The switching module is connected to the interface module, the control module, and a load, respectively. The interface module is connected to the control module, a first battery, and a second battery, respectively. The control module is used to acquire first power information of the first battery and transmit a switching command to the switching module when the first power information exceeds a power switching threshold. The switching module is used to control the first battery and the second battery to simultaneously supply power to the load within a preset period according to the switching command, and to disconnect the power supply circuit between the first battery and the load after the preset period.

[0017] This application incorporates a dual-battery management circuit within the laptop computer. The switching module within this circuit is connected to the interface module, control module, and load. The interface module is connected to the control module, the first battery, and the second battery. First, the control module acquires the first battery's charge level information and transmits a switching command to the switching module when the charge level exceeds a switching threshold. Then, the switching module controls both the first and second batteries to simultaneously power the load within a preset cycle, and disconnects the power supply from the first battery to the load after the preset cycle. Compared to existing technologies, this application improves the laptop's battery life and enhances the reliability and security of power management through seamless switching between the two batteries. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the 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.

[0020] Figure 1 This is a schematic diagram of the structure of the first embodiment of the dual-battery management circuit proposed in this application; Figure 2 This is a schematic diagram of the structure of the second embodiment of the dual-battery management circuit proposed in this application. Figure 3 This is a schematic diagram of the third embodiment of the dual-battery management circuit proposed in this application. Figure 4 This is a schematic diagram of the fourth embodiment of the dual-battery management circuit proposed in this application.

[0021] Explanation of icon numbers:

[0022] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0027] It's worth noting that with the increasing prevalence of mobile work, users have placed higher demands on the battery life and uninterrupted work capabilities of laptops. Especially in high-performance computing and outdoor work scenarios, the capacity of a single built-in battery is insufficient for extended use. Currently, the mainstream solution in the industry is to maximize the energy density of a single battery to increase capacity, but this is limited by the physical size of laptops and safety regulations, and the potential for improvement is nearing its limit. Another approach to enhancing battery life is to equip the device with dual batteries and allow users to swap batteries without shutting down (hot-swapping). However, implementing this feature faces key technical challenges: the system power supply must remain continuous and stable the instant one battery is removed and another is connected, while precisely managing the charging and discharging paths to prevent harmful cross-charging between the two batteries, avoiding energy loss and safety risks.

[0028] To address the aforementioned technical problems, this embodiment proposes a dual-battery management circuit. This circuit is integrated into a laptop computer, with a switching module 2 connected to an interface module 1, a control module 3, and a load 4. The interface module 1 is connected to the control module 3, a first battery 5, and a second battery 6. First, the control module 3 acquires the first battery level information of the first battery 5. When the first battery level exceeds a switching threshold, it transmits a switching command to the switching module 2. Then, the switching module 2, based on the switching command, controls both the first battery 5 and the second battery 6 to simultaneously supply power to the load 4 within a preset period, and disconnects the power supply circuit between the first battery 5 and the load 4 after the preset period. Compared to existing solutions, this application improves the laptop's battery life and the reliability and security of power management through seamless switching between the two batteries.

[0029] For ease of understanding, the following is combined with Figures 1 to 4 The dual-battery management circuit provided in the embodiments of this application will be described in detail.

[0030] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the dual-battery management circuit proposed in this application.

[0031] like Figure 1 As shown, in this embodiment, the circuit includes: an interface module 1, a switching module 2, and a control module 3; The switching module 2 is connected to the interface module 1, the control module 3 and the load 4 respectively, and the interface module 1 is connected to the control module 3, the first battery 5 and the second battery 6 respectively. The control module 3 is used to acquire the first power information of the first battery 5, and transmit a switching command to the switching module 2 when the first power information exceeds the power switching threshold; The switching module 2 is used to control the first battery 5 and the second battery 6 to simultaneously supply power to the load 4 within a preset period according to the switching instruction, and to disconnect the power supply circuit between the first battery 5 and the load 4 after the preset period.

[0032] It should be noted that interface module 1 can be any module with physical connection and signal relay functions, used to establish electrical and communication links between the battery and other parts of the circuit. For example, interface module 1 can include a battery connector that conforms to specific mechanical specifications and electrical protocols.

[0033] The switching module 2 can be any electronic switch array controlled by an electrical signal, used to switch on or off or select current paths, for changing the power supply circuit. For example, the switching module 2 can be composed of multiple metal-oxide-semiconductor field-effect transistors (MOSFETs).

[0034] Control module 3 can be any module with information acquisition, logic judgment, and signal output functions, used to monitor the status and issue control commands. For example, control module 3 can be a microcontroller unit (MCU).

[0035] Load 4 can be the object that the dual-battery management circuit needs to power, i.e., the power consumption system. In the application scenario of this embodiment, load 4 can be the motherboard system of a laptop computer.

[0036] The first battery 5 and the second battery 6 can be two independent energy storage units that can be connected to the interface module 1. For example, both the first battery 5 and the second battery 6 can be rechargeable lithium-ion battery packs.

[0037] Understandably, the first energy information can be data reflecting the current energy storage state of the first battery 5. For example, the first energy information can be the remaining battery capacity percentage, voltage value, or state of charge (SOC) read through a communication protocol.

[0038] The battery switching threshold can be a preset or dynamically calculated reference value used to trigger the battery switching operation. For example, the battery switching threshold can be a fixed capacity percentage (such as 20%), or it can be determined by the control module 3 according to the system strategy.

[0039] The switching command can be a control signal issued by the control module 3 to drive the switching module 2 to change its connection state. For example, the switching command can be a specific set of high and low level digital signals.

[0040] The preset period can be a predefined time length. For example, the preset period can be a fixed duration in milliseconds, or it can be a time window determined by the control module 3 based on the real-time status.

[0041] In its implementation, the control module 3 first continuously or periodically obtains the first power level information of the first battery 5 from the interface module 1. When the control module 3 determines that the first power level information has exceeded the power switching threshold, it generates and transmits a switching command to the switching module 2. Upon receiving the switching command, the switching module 2 executes a specific power path switching operation. This operation consists of two stages: In the first stage, the switching module 2 controls the first battery 5 and the second battery 6 to jointly provide power to the load 4 within the same preset cycle, i.e., the two are connected in parallel to power the load 4; In the second stage, after the preset cycle ends, the switching module 2 disconnects the power supply circuit between the first battery 5 and the load 4, thereby completing the process of smoothly transitioning the main power source from the first battery 5 to the second battery 6, ensuring that battery switching is achieved without interrupting the power supply to the load 4.

[0042] Furthermore, in order to obtain the power switching threshold, continue as follows: Figure 1 As shown, in this embodiment, the control module 3 is also used to obtain the second power information of the second battery 6; The control module 3 is further configured to determine the power switching threshold based on the comparison result of the first power information and the second power information.

[0043] Understandably, the second energy information can be data reflecting the current energy storage state of the second battery 6. For example, the second energy information can be the remaining capacity percentage of the second battery 6, the terminal voltage, or the state of charge (SOC) parameter read through the communication bus.

[0044] The comparison result can be conclusive data obtained after comparing and analyzing the first and second battery power information. For example, the comparison result can be the difference or ratio of the two battery power values, or a logical judgment based on the relationship between the two (such as the first battery 5 having a lower battery power than the second battery 6).

[0045] In its implementation, control module 3 acquires not only the first power level information of the first battery 5 but also, synchronously or alternately, the second power level information of the second battery 6. The method of acquiring the second power level information is similar to that of acquiring the first power level information. For example, control module 3 can read the voltage of the second battery 6 or receive its status data packets through the part of interface module 1 connected to the second battery 6. After simultaneously understanding the power levels of both batteries, control module 3 compares and performs calculations on the first and second power level information. For example, control module 3 can calculate the difference between the second and first power level information, or determine whether the first power level information is lower than the second power level information by a certain percentage. Based on the comparison result, control module 3 dynamically determines or adjusts the power switching threshold. For example, when the comparison results show that the second battery 6 has a very sufficient charge, the control module 3 can set the power switching threshold to a higher level (e.g., 30%) to initiate the switching from the first battery 5 to the second battery 6 earlier, thereby reserving more safety margin; conversely, when the second battery 6 also has a low charge level, the control module 3 can set the power switching threshold to a lower level (e.g., 10%) to make full use of the energy of the first battery 5.

[0046] The laptop computer in this embodiment is equipped with a dual-battery management circuit. The switching module 2 in the dual-battery management circuit is connected to the interface module 1, the control module 3, and the load 4. The interface module 1 is connected to the control module 3, the first battery 5, and the second battery 6. First, the control module 3 obtains the first battery level information of the first battery 5, and transmits a switching command to the switching module 2 when the first battery level information exceeds the power switching threshold. Then, the switching module 2 controls the first battery 5 and the second battery 6 to simultaneously supply power to the load 4 within a preset period, and disconnects the power supply circuit between the first battery 5 and the load 4 after the preset period. Compared to existing solutions, this embodiment improves the laptop's battery life and the reliability and security of power management through seamless switching between the two batteries.

[0047] Reference Figure 2 , Figure 2 This is a schematic diagram of the second embodiment of the dual-battery management circuit proposed in this application.

[0048] Based on the above embodiments, a second embodiment of this application is proposed. To establish a good bridge for circuit transmission between the battery and the circuit, such as... Figure 2 As shown, in this embodiment, the interface module 1 includes: a first battery 5 interface 11 and a second battery 6 interface 12; The interface 11 of the first battery 5 is connected to the switching module 2 and the first battery 5 respectively, and is used to conduct the circuit between the first battery 5 and the switching module 2. The first battery 5 interface 11 is also used to transmit the received first power information to the control module 3; The second battery 6 interface 12 is connected to the switching module 2 and the second battery 6 respectively, and is used to conduct the circuit between the second battery 6 and the switching module 2; The second battery 6 interface 12 is also used to transmit the received second power information of the second battery 6 to the control module 3.

[0049] It should be noted that the first battery 5 interface 11 can be any component with a physical connector and internal conductive path that matches the first battery 5, used to establish a detachable connection and signal path between the first battery 5 and other parts of the circuit. For example, the first battery 5 interface 11 can be a battery socket or connector with specific pin definitions.

[0050] The second battery 6 interface 12 can be any component with a physical connector and internal conductive path that matches the second battery 6, used to establish a detachable connection and signal path between the second battery 6 and other parts of the circuit. For example, the second battery 6 interface 12 can be another battery socket with the same or similar structure as the first battery 5 interface 11.

[0051] In the specific implementation, the first battery 5 interface 11 is plugged into the first battery 5, and simultaneously, the first battery 5 interface 11 is connected to the switching module 2 through its internal power path. Thus, when the first battery 5 is connected, current can flow from the first battery 5, through the first battery 5 interface 11, to the switching module 2, thereby establishing a circuit between the first battery 5 and the switching module 2. Simultaneously, the first battery 5 interface 11 also contains a signal path (e.g., a dedicated communication pin or line), one end of which is connected to the communication terminal of the first battery 5, and the other end is connected to the control module 3. Through this path, the first battery 5 interface 11 can transmit the first power information (such as a voltage signal or digital data packet) received from the first battery 5, reflecting its state, to the control module 3. Similarly, the second battery 6 interface 12 operates on the exact same principle: it is connected to the second battery 6, establishing a power supply circuit from the second battery 6 to the switching module 2, and transmitting the second power information of the second battery 6 to the control module 3. For example, when a user inserts a battery into the laptop's battery compartment (i.e., the first battery 5 interface 11), the battery's positive and negative contacts make contact with the power contacts within the interface to form a power supply circuit. Simultaneously, the battery's data contacts make contact with the signal contacts within the interface, enabling the control module 3 to read the battery's power information. These two interfaces operate independently, allowing the two batteries to be inserted / removed, powered, and communicated independently.

[0052] Furthermore, in order to smoothly switch between the two batteries, continue as follows Figure 2As shown, in this embodiment, the switching module 2 includes: a first switching unit 21 and a second switching unit 22; The first switch unit 21 is connected between the interface module 1 and the load 4, and is used to control the on / off of the power supply circuit between the first battery 5 and the load 4; The second switch unit 22 is connected between the interface module 1 and the load 4, and is used to control the on / off of the power supply circuit between the second battery 6 and the load 4; The control terminals of the first switch unit 21 and the second switch unit 22 are both connected to the control module 3 and are used to receive the switching command.

[0053] It should be noted that the first switching unit 21 can be any electronic switching assembly controlled by an electrical signal to connect or disconnect a specific current path, used to control the change in the connection state between the first battery 5 and the load 4. For example, the first switching unit 21 can be composed of a relay or a semiconductor switching device.

[0054] The second switching unit 22 can be any electronic switching assembly controlled by an electrical signal to connect or disconnect a specific current path, used to control the change in the connection state between the second battery 6 and the load 4. For example, the structure of the second switching unit 22 can be the same as that of the first switching unit 21.

[0055] In the specific implementation, the first switch unit 21 is connected in series in the power supply circuit from the first battery 5, through the interface module 1, to the load 4. Therefore, when the first switch unit 21 is turned on according to the instruction, the first battery 5 can supply power to the load 4; when the first switch unit 21 is turned off, the power supply circuit between the first battery 5 and the load 4 is cut off. Similarly, the second switch unit 22 is connected in series in the same way in the power supply circuit from the second battery 6 to the load 4, independently controlling the on / off state of the circuit. After the control module 3 makes a switching decision based on the power information, it generates a set of specific switching instructions (e.g., a set of specific level signals) and sends them to the switching module 2 through the line. The first switch unit 21 and the second switch unit 22 receive these switching instructions through their respective control terminals and precisely execute the on or off actions according to the instructions, thereby working together to complete the switching operation of simultaneously supplying and disconnecting the power supply circuit.

[0056] Reference Figure 3 , Figure 3 This is a schematic diagram of the third embodiment of the dual-battery management circuit proposed in this application.

[0057] Based on the above embodiments, a third embodiment of this application is proposed. In order to control the connection and disconnection between the first battery 5 and the circuit, such as... Figure 3As shown, in this embodiment, the first switching unit 21 includes: a first PMOS transistor Q1 and a second PMOS transistor Q2; The source of the first PMOS transistor Q1 is connected to the interface module 1, the drain of the first PMOS transistor Q1 is connected to the load 4, and the gate of the first PMOS transistor Q1 is connected to the control module 3. The source of the second PMOS transistor Q2 is connected to the load 4, the drain of the second PMOS transistor Q2 is connected to the interface module 1, and the gate of the second PMOS transistor Q2 is connected to the control module 3.

[0058] It should be noted that the first PMOS transistor Q1 can be a P-channel metal-oxide-semiconductor field-effect transistor. For example, the first PMOS transistor Q1 can be an IRF9Z34N MOSFET.

[0059] The second PMOS transistor Q2 can be another P-channel metal-oxide-semiconductor field-effect transistor of the same type as the first PMOS transistor Q1.

[0060] In this implementation, the source of the first PMOS transistor Q1 is connected to the portion of interface module 1 connected to the first battery 5, and the drain of the first PMOS transistor Q1 is connected to the load 4. Simultaneously, the gate of the first PMOS transistor Q1 is connected to a specific output pin of control module 3. When control module 3 applies a suitable control voltage to the gate of the first PMOS transistor Q1, it can control the on / off state of the discharge circuit from the first battery 5 to the load 4. The connection direction of the second PMOS transistor Q2 is opposite to that of the first PMOS transistor Q1: the source of the second PMOS transistor Q2 is connected to the load 4, the drain of the second PMOS transistor Q2 is connected back to the portion of interface module 1 connected to the first battery 5, and the gate of the second PMOS transistor Q2 is also connected to another output pin of control module 3. This back-to-back connection structure allows the second PMOS transistor Q2 to control the current path from the load 4 to the first battery 5 (e.g., the charging circuit when using an external adapter). Because there is a parasitic diode with a body diode inside the MOSFET, the body diodes of the first PMOS transistor Q1 and the second PMOS transistor Q2 are naturally opposite in direction due to their connection method. Together, they form a bidirectional switch that is independently controlled by the control module 3, thereby accurately realizing the on / off control of the power supply circuit.

[0061] Furthermore, in order to control the connection between the second battery 6 and the circuit, continue as follows: Figure 3 As shown, in this embodiment, the second switching unit 22 includes: a third PMOS transistor Q3 and a fourth PMOS transistor Q4; The source of the third PMOS transistor Q3 is connected to the interface module 1, the drain of the third PMOS transistor Q3 is connected to the load 4, and the gate of the third PMOS transistor Q3 is connected to the control module 3. The source of the fourth PMOS transistor Q4 is connected to the load 4, the drain of the fourth PMOS transistor Q4 is connected to the interface module 1, and the gate of the fourth PMOS transistor Q4 is connected to the control module 3.

[0062] It should be noted that the third PMOS transistor Q3 can be a P-channel metal-oxide-semiconductor field-effect transistor. For example, the third PMOS transistor Q3 can be an IRF9Z34N MOSFET.

[0063] The fourth PMOS transistor Q4 can be another P-channel metal-oxide-semiconductor field-effect transistor, which is of the same type as the third PMOS transistor Q3.

[0064] In the specific implementation, the source of the third PMOS transistor Q3 is connected to the portion of interface module 1 connected to the second battery 6, the drain of the third PMOS transistor Q3 is connected to the load 4, and the gate of the third PMOS transistor Q3 is connected to an output pin of control module 3. This connection allows the third PMOS transistor Q3 to be specifically responsible for controlling the on / off state of the discharge circuit from the second battery 6 to the load 4. The source of the fourth PMOS transistor Q4 is connected to the load 4, the drain of the fourth PMOS transistor Q4 is connected back to the portion of interface module 1 connected to the second battery 6, and the gate of the fourth PMOS transistor Q4 is connected to another output pin of control module 3. This allows the fourth PMOS transistor Q4 to be specifically responsible for controlling the on / off state of the charging circuit from the load 4 to the second battery 6. The third PMOS transistor Q3 and the fourth PMOS transistor Q4 are also connected back-to-back, with their internal body diodes facing opposite directions, together forming a bidirectional switch independently controlled by control module 3. This provides the second battery 6 with the same precise control over the power supply circuit as the first battery 5.

[0065] Reference Figure 4 , Figure 4 This is a schematic diagram of the fourth embodiment of the dual-battery management circuit proposed in this application.

[0066] Based on the above embodiments, a fourth embodiment of this application is proposed. To ensure that the control module 3 itself receives a continuous and stable power supply, such as... Figure 4 As shown, in this embodiment, the circuit further includes: a power supply module 7; The input terminal of the power supply module 7 is connected to the switching module 2, and the output terminal of the power supply module 7 is connected to the control module 3 to provide operating voltage to the control module 3.

[0067] It should be noted that the power supply module 7 can be any module with voltage conversion and regulation functions, used to obtain electrical energy from the main power path and convert it into a voltage suitable for the operation of a specific chip. For example, the power supply module 7 can be a power supply circuit containing a linear regulator or a switching regulator.

[0068] The operating voltage can be a DC power supply voltage that meets the electrical specifications required for the normal operation of the control module 3. For example, the operating voltage can be 3.3 volts or 5 volts.

[0069] In its implementation, the input of power supply module 7 is connected to the output of switching module 2 or a common power supply node. This means that regardless of whether switching module 2 is currently directing power from the first battery 5 or the second battery 6 to the load 4, or both simultaneously, the power on the main power supply path can be obtained by power supply module 7. The output of power supply module 7 is directly connected to the power input pin of control module 3. The function of power supply module 7 is to process the input power (e.g., step down and regulate the voltage), converting it into a stable operating voltage that meets the requirements of control module 3, and continuously supplying it to control module 3. For example, assuming the voltage of the main power supply path is 12V, while control module 3 requires 3.3V to operate, then power supply module 7 draws power from the 12V line after switching module 2, stably converts it to 3.3V, and then supplies it to control module 3.

[0070] Furthermore, in order to safely and reliably obtain and convert a stable operating voltage from the main power supply, the following steps are continued... Figure 4 As shown, in this embodiment, the power supply module 7 includes: a unidirectional conduction unit 71 and a voltage regulator unit 72; The input terminal of the unidirectional conduction unit 71 is connected to the switching module 2, the output terminal of the unidirectional conduction unit 71 is connected to the input terminal of the voltage regulator unit 72, and the output terminal of the voltage regulator unit 72 is connected to the control module 3.

[0071] It should be noted that the unidirectional conduction unit 71 can be any unit with unidirectional conductivity, used to allow current to flow only from the input terminal to the output terminal, while preventing reverse current. For example, the unidirectional conduction unit 71 can be a rectifier diode.

[0072] The voltage regulator unit 72 can be any unit capable of converting fluctuating input voltage into a stable output voltage. For example, the voltage regulator unit 72 can be a low-dropout linear regulator (LDO).

[0073] In the specific implementation, the input terminal of the unidirectional conduction unit 71 is directly connected to the common output terminal (i.e., the main power supply path) of the switching module 2. The output terminal of the unidirectional conduction unit 71 is connected to the input terminal of the voltage regulator unit 72. The output terminal of the voltage regulator unit 72 is finally connected to the power supply pin of the control module 3. During operation, the electrical energy on the main power supply path first flows into the unidirectional conduction unit 71. The unidirectional conduction unit 71 ensures that the current can only flow from the switching module 2 to the voltage regulator unit 72 and cannot flow in the reverse direction. This prevents the current from back-flowing into the switching module 2 or the battery under certain conditions (such as during battery switching or when the voltage at the load terminal 4 suddenly changes), thus providing isolation and protection. The electrical energy after passing through the unidirectional conduction unit 71 enters the voltage regulator unit 72. Regardless of how the voltage at its input terminal fluctuates within a certain range, the voltage regulator unit 72 will generate a constant operating voltage (e.g., 3.3V) at its output terminal that meets the requirements of the control module 3. For example, when the main power supply path voltage varies between 10V and 15V, after passing through the unidirectional conduction unit 71 and then through a voltage regulation unit 72, a stable 3.3V is always output to the control module 3. This two-stage processing ensures that even during slight fluctuations in the main path voltage caused by battery switching, the control module 3 can obtain a continuous, stable, and safe power supply.

[0074] To achieve the above objectives, this application also proposes a dual-battery management system, which includes the dual-battery management circuit described above.

[0075] It should be noted that the specific implementation of the dual-battery management system provided in this embodiment can refer to the above embodiments, and this embodiment will not elaborate on it further. Therefore, the effects achieved by the dual-battery management system in this embodiment can also refer to the above embodiments, and this embodiment will not elaborate on them further.

[0076] To achieve the above objectives, this application also proposes a laptop computer, wherein the dual battery management system includes the dual battery management system described above.

[0077] It should be noted that the specific implementation of the laptop computer provided in this embodiment can refer to the above embodiments, and this embodiment will not elaborate on them. Therefore, the effects achieved by the laptop computer in this embodiment can also refer to the above embodiments, and this embodiment will not elaborate on them either.

[0078] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A dual-battery management circuit, characterized in that, The circuit includes: an interface module, a switching module, and a control module; The switching module is connected to the interface module, the control module, and the load, respectively; the interface module is connected to the control module, the first battery, and the second battery, respectively. The control module is used to acquire the first power information of the first battery, and when the first power information exceeds the power switching threshold, transmit a switching command to the switching module; The switching module is configured to control the first battery and the second battery to simultaneously supply power to the load within a preset period according to the switching instruction, and to disconnect the power supply circuit between the first battery and the load after the preset period.

2. The circuit as described in claim 1, characterized in that, The control module is also used to acquire the second power information of the second battery; The control module is further configured to determine the power switching threshold based on the comparison result of the first power information and the second power information.

3. The circuit as described in claim 1, characterized in that, The interface module includes: a first battery interface and a second battery interface; The first battery interface is connected to the switching module and the first battery respectively, and is used to conduct the circuit between the first battery and the switching module; The first battery interface is also used to transmit the received first power information to the control module; The second battery interface is connected to both the switching module and the second battery, and is used to establish a circuit between the second battery and the switching module. The second battery interface is also used to transmit the received second battery power information to the control module.

4. The circuit as described in claim 1, characterized in that, The switching module includes: a first switching unit and a second switching unit; The first switching unit is connected between the interface module and the load, and is used to control the on / off state of the power supply circuit between the first battery and the load; The second switching unit is connected between the interface module and the load, and is used to control the on / off state of the power supply circuit between the second battery and the load; The control terminals of both the first and second switching units are connected to the control module to receive the switching command.

5. The circuit as described in claim 4, characterized in that, The first switching unit includes: a first PMOS transistor and a second PMOS transistor; The source of the first PMOS transistor is connected to the interface module, the drain of the first PMOS transistor is connected to the load, and the gate of the first PMOS transistor is connected to the control module. The source of the second PMOS transistor is connected to the load, the drain of the second PMOS transistor is connected to the interface module, and the gate of the second PMOS transistor is connected to the control module.

6. The dual-battery management circuit as described in claim 4, characterized in that, The second switching unit includes: a third PMOS transistor and a fourth PMOS transistor; The source of the third PMOS transistor is connected to the interface module, the drain of the third PMOS transistor is connected to the load, and the gate of the third PMOS transistor is connected to the control module. The source of the fourth PMOS transistor is connected to the load, the drain of the fourth PMOS transistor is connected to the interface module, and the gate of the fourth PMOS transistor is connected to the control module.

7. The circuit as described in claim 1, characterized in that, The circuit also includes: a power supply module; The input terminal of the power supply module is connected to the switching module, and the output terminal of the power supply module is connected to the control module to provide operating voltage to the control module.

8. The circuit as described in claim 6, characterized in that, The power supply module includes: a unidirectional conduction unit and a voltage regulation unit; The input terminal of the unidirectional conduction unit is connected to the switching module, the output terminal of the unidirectional conduction unit is connected to the input terminal of the voltage regulator unit, and the output terminal of the voltage regulator unit is connected to the control module.

9. A dual-battery management system, characterized in that, The dual-battery management system includes the dual-battery management system circuit according to any one of claims 1 to 8.

10. A laptop computer, characterized in that, The laptop computer includes the dual-battery management system as described in claim 9.

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