Power supply control circuit, system and method

Abstract

This device minimizes the impact of interrupted functionality caused by the temporary power supply during battery switching in dual-battery devices. [Solution] An embodiment of the present invention provides a power supply control circuit, system and method, the power supply control circuit comprising: a switch circuit connected between an auxiliary power supply terminal of a battery module and a main control module; a quick start circuit connected to the control terminal of the switch circuit and generating a first switch control signal based on a quick ON signal of the main control module; a power supply detection circuit connected to the control terminal of the switch circuit and generating a second switch control signal based on an auxiliary power supply control signal of the battery module, wherein the switch circuit conducts when either the first switch control signal or the second switch control signal indicates conduction; and a power consumption control circuit connected to the power supply detection circuit and activating the power supply detection circuit based on a power consumption prevention signal of the main control module. According to the embodiment of the present invention, it is possible to avoid interruption of function due to power supply interruption during battery switching.

Description

Technical Field

[0001] The present invention relates to the technical field of battery switching, and in particular, to a power supply control circuit, system and method.

Background Art

[0002] In the prior art, a device supports being simultaneously connected to two battery packs, and the two battery packs can supply power to the device as backups for each other. In the process of power supply by the battery pack, it is necessary to provide a power supply voltage that guarantees the normal operation of the device. If the power amount of a certain battery pack is insufficient to support the normal operation of the device, it is necessary to switch to a battery pack with sufficient power amount to continue power supply to the device. There are generally two switching methods. As one method, two battery packs that back up each other are instantaneously switched to avoid power supply interruption of the device. However, in the switching process, there is a difference in the output voltage between the main / sub battery packs. Therefore, the power supply voltage during the operation of the device changes suddenly, and the sudden change voltage shocks the device and is likely to cause damage to the device. As another method, the battery pack with low power amount is switched to the battery pack with sufficient power amount by an insertion / extraction operation. However, since the power supply of the device does not support hot plugging, there is a problem of short-time power supply interruption, which causes interruption of some functions of the device and affects the normal operation of the device.

Summary of the Invention

[0003] In view of the above problems, embodiments of the present application provide a power supply control circuit, system and method to solve the technical problem of function interruption caused by temporary power supply interruption during battery switching of a dual-battery device.

[0004] According to a first aspect, an embodiment of the present application provides a switch circuit connected between an auxiliary power supply terminal of a battery module and a main control module; a quick start circuit connected to the control terminal of the switch circuit and generating a first switch control signal based on a quick ON signal of the main control module; a power supply detection circuit connected to the control terminal of the switch circuit and generating a second switch control signal based on an auxiliary power supply control signal of the battery module, wherein the power supply detection circuit conducts when either the first switch control signal or the second switch signal indicates conduction; and a power consumption control circuit connected to the power supply detection circuit and activating the power supply detection circuit based on a power consumption prevention signal of the main control module.

[0005] In some embodiments, the quick-start circuit includes a first switch transistor, a first resistor, and a second resistor, wherein the first switch transistor is connected between a ground terminal and a control terminal of the switch circuit, the first resistor is connected between a first port of the main control module and the control terminal of the first switch transistor, the second resistor is connected between the control terminal of the first switch transistor and a first terminal, and the first port outputs a quick-on signal.

[0006] In some embodiments, the power supply detection circuit includes a second switch transistor, a third resistor, and a fourth resistor, the second switch transistor being connected between the ground terminal and the control terminal of the switch circuit, the third resistor being connected between the auxiliary power supply control terminal of the battery module and the control terminal of the second switch transistor, and the fourth resistor being connected between the control terminal of the second switch transistor and the first terminal, the auxiliary power supply control terminal outputting an auxiliary power supply control signal.

[0007] In some embodiments, the power consumption control circuit includes a third switch transistor, a fifth resistor, and a sixth resistor, wherein the third switch transistor is connected between the ground terminal and the control terminal of the second switch transistor, the fifth resistor is connected between the second port of the main control module and the control terminal of the third switch transistor, the sixth resistor is connected between the control terminal of the third switch transistor and the first terminal, and the second port outputs a power consumption prevention signal.

[0008] In some embodiments, the switch circuit includes a fourth switch transistor, a seventh resistor, and an eighth resistor, the fourth switch transistor being connected between the auxiliary power supply terminal of the battery module and the main control module, the seventh resistor having one end connected to the control terminal of the fourth switch transistor and the other end receiving the first and second switch control signals, and the eighth resistor being connected between the control terminal of the fourth switch transistor and the first terminal.

[0009] In some embodiments, the power supply control circuit further includes an installation detection circuit connected to the main control module that generates a first signal when it detects that a battery module has been installed and generates a second signal when it detects that the battery module has been removed.

[0010] According to a second aspect, an embodiment of the present application provides a power supply control system comprising at least two of the power supply control circuits, each corresponding to a single battery module, and a main control module connected to the at least two power supply control circuits.

[0011] In some embodiments, when the main control module detects that a battery module that is currently powered has been removed, it outputs a quick-on signal to the quick-start circuit corresponding to the first target battery module, notifying the first target battery module that the quick-start circuit will conduct the corresponding switch circuit and begin supplying power to the load circuit, and / or, in response to a battery switching request, notifies the battery module that is currently powered that it will stop supplying power to the load circuit, and outputs a quick-on signal to the quick-start circuit corresponding to the second target battery module, notifying the second target battery module that the quick-start circuit will conduct the corresponding switch circuit and begin supplying power to the load circuit.

[0012] In some embodiments, the main control module further outputs a power consumption prevention signal to the power consumption control circuit corresponding to the battery module that is currently powered, in response to a battery switching request, and the corresponding power supply detection circuit disconnects the corresponding switch circuit.

[0013] In some embodiments, the main control module further notifies the battery module in a powered state that it will output an auxiliary power supply control signal in response to a battery switching request, and the corresponding power supply detection circuit disconnects the corresponding switch circuit.

[0014] In some embodiments, the main control module further determines a third target battery module based on predetermined logic and notifies the third target battery module to start supplying power to the load circuit if a battery module is installed and none of the battery modules are supplying power to the load circuit.

[0015] In some embodiments, the power supply control system further includes a voltage conversion circuit connected between the switch circuit of each power supply control circuit and the main control module, which converts the voltage at the auxiliary power supply terminal of the battery module to the operating voltage of the main control module.

[0016] In some embodiments, the voltage conversion circuit is further connected to the load power supply terminal of each battery module, converting the voltage at the load power supply terminal of the battery module to the operating voltage of the main control module.

[0017] In some embodiments, the power supply control system further includes a one-way conductive unit connected between each switch circuit and the voltage conversion circuit, and between each load power supply terminal and the voltage conversion circuit.

[0018] In some embodiments, each battery module includes an auxiliary power supply terminal for supplying power to a main control module, a load power supply terminal for supplying power to a load circuit, a communication terminal connected to the main control module, an auxiliary power supply control terminal for generating an auxiliary power supply control signal, a device detection circuit that generates a first signal when it detects that the battery module has been installed and generates a second signal when it detects that the battery module has been removed, and a control unit that, when it detects that the battery module has been installed, outputs an auxiliary power supply control signal to the power supply detection circuit via the auxiliary power supply control terminal that instructs the switch circuit to conduct, and when it receives a power supply notification from the main control module via the communication terminal, starts supplying power from the load power supply terminal to the load circuit.

[0019] In some embodiments, the control unit further outputs an auxiliary power supply control signal to the power supply detection circuit via the auxiliary power supply control terminal, instructing the switch circuit to be disconnected when it receives a disconnection notification from the main control module via the communication terminal.

[0020] According to a third aspect, an embodiment of the present application provides a power supply control method for the power supply control system described above, and this method is - Step 1 detects the installation status of the battery module, including whether the main / sub battery module is installed and the amount of electricity in the installed battery module. - Based on the detection results in Step 1, determine whether or not to switch the battery module for power supply. When both the main battery module and the sub-battery module are installed and the electrical charge is sufficient, the main control module selects power supply from the main battery module based on predetermined logic, turns off power supply from the sub-battery module, and there is no need to switch power supplies. If both the main battery module and the sub-battery module are installed, and the main battery module has insufficient charge while the sub-battery module has sufficient charge, then power supply from the main battery module will be turned off, and power supply from the sub-battery module will be switched on. Step 2 involves switching to power supply by the sub-battery module when the main battery module is instantaneously switched from an installed state to an uninstalled state. Power supply by the battery module includes step 2, which includes load power supply and auxiliary power supply, -Based on the results of the determination in Step 2, select the method for switching the battery module for power supply. When the main battery module is installed, the main control module simultaneously outputs a communication signal and a quick-on signal. The main control module sends the communication signal to the main battery module to turn off load power supply, and sends the quick-on signal to the power supply control circuit corresponding to the sub-battery module to turn on auxiliary power supply. Subsequently, the main control module sends the communication signal to the sub-battery module to turn on load power supply, and sends a power consumption prevention signal to the power supply control circuit corresponding to the main battery module to turn off auxiliary power supply. If the main battery module is not installed, step 3 involves the main control module sending a quick ON signal to the power supply control circuit corresponding to the sub-battery module to turn on auxiliary power, and then the main control module sending a communication signal to the power supply control circuit corresponding to the sub-battery module to turn on load power, Includes.

[0021] In some embodiments, when both the main battery module and the sub-battery module are installed, both the main battery module and the sub-battery module output a first signal and an auxiliary power supply control signal, and the main control module selects power supply by the main battery module based on the received first signal, the auxiliary power supply control signal and predetermined logic. Specifically, the method for turning off power supply by the sub-battery module involves the main control module sending a communication signal to the sub-battery module, the sub-battery module turning off load power supply based on the communication signal, and the main control module sending a power consumption prevention signal to the sub-power supply control circuit to turn off auxiliary power supply by the sub-battery module. The power consumption prevention signal has a higher priority than the auxiliary power supply control signal.

[0022] In some embodiments, the detection of the amount of electricity in the installed battery module involves specifically detecting whether the operating voltage output from the battery module is less than a threshold voltage. If it is less than the threshold voltage, the detection result indicates that the amount of electricity in the battery module is insufficient, and the threshold voltage is the power supply voltage that guarantees the normal operation of the load circuit.

[0023] In the embodiment of the present invention, when a battery module is installed, a power supply detection circuit conducts a switch circuit between the auxiliary power supply terminal of the battery module and the main control module based on the auxiliary power supply control signal of the battery module. When switching batteries, a quick start circuit conducts a switch circuit between the auxiliary power supply terminal of the battery module and the main control module based on a quick on signal from the main control module, thereby avoiding a functional interruption due to power cutoff from the main control module. After the battery is switched to a backup battery, a power consumption control circuit activates the power supply detection circuit and disconnects the switch circuit based on a power consumption prevention signal from the main control module, thereby avoiding the consumption of electricity from the backup battery.

[0024] These or other aspects of the present application will be made simpler and easier to understand in the following description of the embodiments.

[0025] To more clearly explain the technical means in the embodiments of the present application, the drawings necessary for the description of the embodiments will be briefly described below. Clearly, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative labor.

Brief Description of the Drawings

[0026] [Figure 1] It is a schematic configuration diagram of a power supply control circuit according to an embodiment of the present application. [Figure 2] It is a schematic configuration diagram of a power supply control system according to an embodiment of the present application. [Figure 3] It is a schematic configuration diagram of a battery module according to an embodiment of the present application. [Figure 4] It is a schematic configuration diagram of an electronic system according to an embodiment of the present application.

Modes for Carrying Out the Invention

[0027] Hereinafter, the embodiments of the present application will be described in detail. The examples of the embodiments are shown in the drawings, and the same or similar reference numerals consistently represent the same or similar components, or components having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only for explaining the present application, and should not be understood as limiting the present application.

[0028] Hereinafter, in order to enable those skilled in the art to understand the technical means of the present application well, the technical means in the embodiments of the present application will be clearly and completely described by combining the drawings in the embodiments of the present application. Clearly, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present application.

[0029] In the embodiments of this application, the relational terms such as "first" and "second" used herein are merely for distinguishing one entity or operation from another, and do not necessarily require or suggest that any such actual relationship or order exists between these entities or operations.

[0030] The terms “includes,” “equipment,” or any other variation thereof are intended to be non-exclusive; a process, method, article, or apparatus that includes a set of elements includes not only those elements but also other elements not explicitly listed or elements specific to such process, method, article, or apparatus. Unless further limited, an element limited by the phrase “includes one…” does not preclude the existence of other identical elements in a process, method, article, or apparatus that includes the aforementioned element.

[0031] In the description of the embodiments of this Application, words such as “exemplary” or “for example” are intended to indicate an example, explanation, or description. Any embodiment or design described as “exemplary” or “for example” in the embodiments of this Application shall not be construed as being preferable to or having more advantages than another embodiment or design. Words such as “exemplary” or “for example” are intended to clearly indicate relative concepts.

[0032] Furthermore, in the embodiments of this application, “multiple” means two or more, and in view of this, in the embodiments of this application, “multiple” may be understood as “at least two.” “At least one” may be understood as one or more, for example, one, two or more. For example, “including at least one” means including one, two or more, without limiting what is included, for example, “including at least one of A, B and C” may include A, B, C, A and B, A and C, B and C, or A, B and C.

[0033] In the embodiments of this application, "and / or" describes the relationship between related objects and indicates that three types of relationships are possible. For example, A and / or B indicates three cases: A exists alone, A and B exist simultaneously, and B exists alone. The letter " / " generally indicates that the preceding and following related objects have an "or" relationship unless otherwise specified.

[0034] In the embodiments of this application, "connection" may be understood as an electrical connection, and the connection between two electrical elements may be a direct or indirect connection between the two electrical elements. For example, with respect to the connection between A and B, A and B may be directly connected, or A and B may be indirectly connected through one or more other electrical elements. [Examples]

[0035] Figure 1 shows a power supply control circuit according to an embodiment of the present application, Figure 2 shows a power supply control system including the power supply control circuit shown in Figure 1, Figure 3 shows a schematic configuration diagram of a battery module, and Figure 4 shows a schematic diagram of an electronic system using the power supply control circuit, power supply control system, and battery module according to an embodiment of the present application. The power supply control circuit and system according to an embodiment of the present application will be described below with reference to Figures 1 to 4.

[0036] As shown in Figures 1 and 2, in some embodiments, the power supply control circuit 110 may include a switch circuit 111, a quick start circuit 112, a power supply detection circuit 113, and a power consumption control circuit 114. The switch circuit 111 is connected between the auxiliary power supply terminal of the battery module 200 and the main control module 120. The quick start circuit 112 is connected to the control terminal of the switch circuit 111 and generates a first switch control signal based on the quick on signal of the main control module 120. The power supply detection circuit 113 is connected to the control terminal of the switch circuit 111 and generates a second switch control signal based on the auxiliary power supply control signal of the battery module 200. The switch circuit 111 conducts when either the first switch control signal or the second switch signal instructs it to conduct. In other words, the power supply detection circuit 113 can conduct or disconnect the switch circuit 111 based on the auxiliary power supply control signal of the battery module 200, and the quick start circuit 112 can conduct or disconnect the switch circuit 111 based on the quick on signal of the main control module 120. The power consumption control circuit 114 is connected to the power supply detection circuit 113 and activates the power supply detection circuit 113 based on the power consumption prevention signal of the main control module 120. Specifically, if the power consumption prevention signal instructs the power supply detection circuit 113 to be activated, the power supply detection circuit 113 generates a second switch control signal based on the auxiliary power supply control signal of the battery module 200, and if the power consumption prevention signal instructs the power supply detection circuit 113 not to be activated, the power supply detection circuit 113 outputs a second switch control signal instructing the switch circuit 111 to be disconnected.

[0037] As shown in Figures 3 and 4, in some embodiments, the battery module 200 includes an auxiliary power supply terminal 201 (corresponding to port 4 in Figure 4) that supplies power to the main control module 120, a load power supply terminal 202 (corresponding to ports 1 and 8 in Figure 4) that supplies power to the load circuit 130, a communication terminal 203 (corresponding to ports 6 and 7 in Figure 4) that is connected to the main control module 120, an auxiliary power supply control terminal 204 (corresponding to port 2 in Figure 4) that generates an auxiliary power supply control signal, and a detection terminal that detects when the battery module is installed. The system includes: an equipment detection circuit 230 (corresponding to port 5 in Figure 4) that generates a first signal when a power is output and a second signal when it detects that the battery module has been removed; and a control unit 210 that, when it detects that the battery module has been installed, outputs an auxiliary power supply control signal to the power supply detection circuit 113 via the auxiliary power supply control terminal 204, instructing the switch circuit 111 to conduct, and when it receives a power supply notification from the main control module 120 via the communication terminal 203, starts supplying power from the load power supply terminal 202 to the load circuit 130.

[0038] As shown in Figure 4, the electronic system includes electrical equipment 100 and a battery module 200. Electrical equipment 100 includes a power supply control circuit 110, a main control module 120, and a load circuit 130. As shown in Figure 4, the main control module 120 may include a microcontroller (MCU) and an interactive module, and the interactive module may include output units such as a display, indicator lamps, and speakers.

[0039] In the embodiments of the present invention, the electrical device 100 may include at least two power supply control circuits 110, each corresponding to one battery module 200. The battery modules 200 supply power to the electrical device 100. The power supply control circuits 110 control the power supply status between the battery modules 200 and the electrical device 100. In the embodiments of the present invention, the main control module 120 can control the at least two power supply control circuits 110, each corresponding to a battery module 200, so as to enable main / backup switching, with one of the at least two battery modules 200 designated as the main battery and the other battery module 200 as the backup battery. For convenience, as shown in Figures 2 and 4, the power supply control circuits 110 include a first power supply control circuit 110a and a second power supply control circuit 110b, and the battery module 200 includes a first battery module 200a and a second battery module 200b.

[0040] Although Figure 4 shows that the power supply control circuit 110 is provided in the electrical equipment 100, in the embodiment of the present invention, the power supply control circuit 110 may be provided at least partially in the battery module 200, or the power supply control circuit 110 may be independent of the battery module 200 and the electrical equipment 100. In other words, the power supply control circuit 110 may be provided only inside the electrical equipment 100, or only inside the battery module 200, or independently of the electrical equipment 100 and the battery module 200. Selectively, the power supply control circuit 110 and the battery module 200 may be provided simultaneously inside the electrical equipment 100.

[0041] Furthermore, in some embodiments, the quick-start circuit 112 may include a first switch transistor, a first resistor, and a second resistor, the first switch transistor being connected between the ground terminal and the control terminal of the switch circuit, the first resistor being connected between the first port of the main control module and the control terminal of the first switch transistor, the second resistor being connected between the control terminal of the first switch transistor and the first terminal, and the first port outputting a quick-on signal. As an example, as shown in Figure 4, in the first power supply control circuit 110a, the first switch transistor is a MOS transistor Q5, the first resistor is a resistor R9, and the second resistor is a resistor R11. In the second power supply control circuit 110b, the first switch transistor is a MOS transistor Q6, the first resistor is a resistor R10, and the second resistor is a resistor R12. The ground terminal is denoted as GND.

[0042] Furthermore, in some embodiments, the power supply detection circuit 113 may include a second switch transistor, a third resistor, and a fourth resistor, the second switch transistor being connected between the ground terminal and the control terminal of the switch circuit, the third resistor being connected between the auxiliary power supply control terminal of the battery module and the control terminal of the second switch transistor, and the fourth resistor being connected between the control terminal of the second switch transistor and the first terminal, the auxiliary power supply control terminal outputting an auxiliary power supply control signal. As an example, as shown in Figure 4, in the first power supply control circuit 110a, the second switch transistor is a MOS transistor Q3, the third resistor is a resistor R5, and the fourth resistor is a resistor R7. In the second power supply control circuit 110b, the second switch transistor is a MOS transistor Q4, the third resistor is a resistor R6, and the fourth resistor is a resistor R8.

[0043] Furthermore, in some embodiments, the power consumption control circuit 114 may include a third switch transistor, a fifth resistor, and a sixth resistor, the third switch transistor being connected between the ground terminal and the control terminal of the second switch transistor, the fifth resistor being connected between the second port of the main control module and the control terminal of the third switch transistor, and the sixth resistor being connected between the control terminal of the third switch transistor and the first terminal, the second port outputting a power consumption prevention signal. As an example, as shown in Figure 1, in the first power supply control circuit 110a, the third switch transistor is a MOS transistor Q7, the fifth resistor is a resistor R13, and the sixth resistor is a resistor R15. In the second power supply control circuit 110b, the third switch transistor is a MOS transistor Q8, the fifth resistor is a resistor R14, and the sixth resistor is a resistor R16.

[0044] Furthermore, in some implementations, the switch circuit 111 includes a fourth switch transistor, a seventh resistor, and an eighth resistor, the fourth switch transistor being connected between the auxiliary power supply terminal of the battery module and the main control module, one end of the seventh resistor being connected to the control terminal of the fourth switch transistor and the other end receiving the first and second switch control signals, and the eighth resistor being connected between the control terminal and the first terminal of the fourth switch transistor. As an example, as shown in Figure 4, in the first power supply control circuit 110a, the fourth switch transistor is a MOS transistor Q1, the seventh resistor is a resistor R3, and the eighth resistor is a resistor R1. In the second power supply control circuit 110b, the fourth switch transistor is a MOS transistor Q2, the seventh resistor is a resistor R4, and the eighth resistor is a resistor R2.

[0045] In some embodiments, the power supply control circuit 110 is connected to the main control module 120 and further includes an installation detection circuit 115 that generates a first signal when it detects that the battery module 200 has been installed and generates a second signal when it detects that the battery module 200 has been removed. As an example, as shown in Figure 1, in the first power supply control circuit 110a, the installation detection circuit 115 includes a resistor R17. In the second power supply control circuit 110b, the installation detection circuit 115 includes a resistor R18.

[0046] In some embodiments, when the main control module 120 detects that a battery module 200 that is currently powered has been removed, it outputs a quick-on signal to the quick-start circuit 112 corresponding to the first target battery module, notifying the first target battery module that the quick-start circuit 112 will conduct to the corresponding switch circuit 111 and begin supplying power to the load circuit 130.

[0047] In some embodiments, the main control module 120, in response to a battery switching request, notifies the battery module 200 that is currently powered to stop supplying power to the load circuit 130, outputs a quick-on signal to the quick-start circuit 112 corresponding to the second target battery module, and notifies the second target battery module that the quick-start circuit 112 will conduct the corresponding switch circuit 111 and start supplying power to the load circuit 130.

[0048] In some embodiments, the main control module 120 further outputs a power consumption prevention signal to the power consumption control circuit 114 corresponding to the battery module that is currently powered, in response to a battery switching request, causing the corresponding power supply detection circuit 113 to disconnect the corresponding switch circuit 111.

[0049] In some embodiments, the main control module 120 further notifies the battery module in the powered state that it will output an auxiliary power supply control signal in response to a battery switching request, and the corresponding power supply detection circuit 113 disconnects the corresponding switch circuit 111.

[0050] In some embodiments, the main control module 120 further determines a third target battery module based on predetermined logic and notifies the third target battery module to start supplying power to the load circuit 130 if a battery module is installed and none of the battery modules are supplying power to the load circuit 130.

[0051] In some embodiments, the electrical equipment 100 further includes a voltage conversion circuit 140 connected between the switch circuit 111 of each power supply control circuit 110 and the main control module 120, which converts the voltage at the auxiliary power supply terminal of the battery module 200 to the operating voltage of the main control module. Preferably, the voltage conversion circuit 140 is further connected to the load power supply terminal of each battery module 200, which converts the voltage at the load power supply terminal of the battery module 200 to the operating voltage of the main control module 120.

[0052] In some embodiments, the electrical equipment further includes a one-way conductive unit connected between each switch circuit and the voltage conversion circuit, and between each auxiliary power supply terminal and the voltage conversion circuit 140. As an example, this includes diodes D1, D2, and D3, as shown in Figure 4.

[0053] In some embodiments, the control unit 210 further outputs an auxiliary power supply control signal to the power supply detection circuit via the auxiliary power supply control terminal, instructing the switch circuit to be disconnected, when it receives a disconnection notification from the main control module via the communication terminal.

[0054] In some embodiments, as shown in Figure 4, before the first battery module 200a is inserted into the electrical device, the positive and negative terminals of the battery are disconnected. After the first battery module 200a is inserted into the electrical device, pin 5 recognizes that the first battery module 200a is inserted into the battery compartment of the electrical device, pin 4 outputs to the outside, port 2 outputs a high-level signal, the high-level signal from port 2 is divided by R5 and R7 and is higher than the on-voltage of the N-channel MOS transistor Q3, causing the MOS transistor Q3 to conduct, and after the MOS transistor Q3 conducts, resistor R3 is pulled down, the voltage division between resistor R1 and resistor R3 is sufficient to turn on the P-channel MOS transistor Q1, causing the MOS transistor Q1 to conduct, the voltage output from port 4 is provided to the voltage conversion circuit of the electrical device via Q1 and diode D1, the voltage conversion circuit converts to obtain the operating voltage VCC of the MCU. The operating voltage powers the MCU and is sufficient to start up the device.

[0055] If another second battery module 200b is inserted, the operating sequence is the same as that of the first battery module 200a. In this case, both packs' ports 4 supply power to the MCU. Based on predetermined logic, the MCU can select which electrical module to supply power preferentially and notify the two electrical modules via ports 6 and 7 whether to continue operating or turn them off directly. If it is selected to turn on the first battery module 200a, ports 1 / 8 of the first battery module 200a become conductive, and the first battery module 200a supplies power to the load circuit of the electrical equipment. If the corresponding second battery module 200b does not supply power, the MCU notifies the second battery module 200b to turn off the high-level output of port 2, or pulls down the high-level signal with a battery power consumption prevention control signal, disconnecting MOS transistors Q4 and Q2. In this way, although the output of port 4 of the second battery module 200b still exists, the path is disconnected, ensuring that electricity is not output from port 4 to electrical equipment and does not supply power to the MCU.

[0056] In some embodiments, as shown in Figure 4, when it is necessary to switch battery packs during operation, the first battery module 200a is notified via ports 6 and 7 to turn off the output of port 1 / 8, and a rapid ON signal is used to conduct MOS transistors Q6 and Q2, causing port 4 of the second battery module 200b to output. Subsequently, the second battery module 200b is notified via ports 6 and 7 to turn on the output of port 1 / 8, and finally, a power consumption prevention control signal is used to conduct MOS transistor Q7, thereby disconnecting MOS transistors Q3 and Q1 and preventing power consumption from port 4 of the first battery module 200a.

[0057] In some embodiments, as shown in Figure 4, when the first battery module 200a is discharged, the moment it is removed, the connection between resistors R21 and R17 is broken, the voltage division between resistors R17 and R21 changes, triggering an interruption inside the MCU. At this time, some charge still remains in the capacitor at the input terminal of the MCU, so the power supply to the MCU is still sufficient to maintain operation. The MCU responds quickly, controlling the MOS transistor Q6 to conduct with a rapid ON signal, which in turn conducts the MOS transistor Q2. The signal output from port 4 of the second battery module 200b is then supplied to the voltage conversion circuit via MOS transistor Q2 and diode D3, ensuring that the power supply to the MCU is not interrupted. [Examples]

[0058] An embodiment of the present application is a power supply control method for the above-mentioned power supply control system, Step 1 detects the installation status of the battery module, including whether the main / sub battery module is installed and the amount of electricity in the installed battery module. Based on the detection results in Step 1, a decision is made as to whether or not to switch the battery module for power supply. When both the main battery module and the sub-battery module are installed and the electrical charge is sufficient, the main control module selects power supply from the main battery module based on predetermined logic, turns off power supply from the sub-battery module, and there is no need to switch power supplies. If both the main battery module and the sub-battery module are installed, and the main battery module has insufficient charge while the sub-battery module has sufficient charge, then power supply from the main battery module will be turned off, and power supply from the sub-battery module will be switched on. Step 2 involves switching to power supply by the sub-battery module when the main battery module is instantaneously switched from an installed state to an uninstalled state. Power supply by the battery module includes step 2, which includes load power supply and auxiliary power supply, Based on the results of the determination in Step 2, select the method for switching the battery module for power supply. When the main battery module is installed, the main control module simultaneously outputs a communication signal and a quick-on signal. The main control module sends the communication signal to the main battery module to turn off load power supply, and sends the quick-on signal to the power supply control circuit corresponding to the sub-battery module to turn on auxiliary power supply. Subsequently, the main control module sends the communication signal to the sub-battery module to turn on load power supply, and sends a power consumption prevention signal to the power supply control circuit corresponding to the main battery module to turn off auxiliary power supply. The present invention provides a method comprising step 3, in which, if the main battery module is not installed, the main control module sends a quick ON signal to the power supply control circuit corresponding to the sub-battery module to turn on auxiliary power, and then the main control module sends a communication signal to the power supply control circuit corresponding to the sub-battery module to turn on load power.

[0059] In some embodiments, when both the main battery module and the sub-battery module are installed, both the main battery module and the sub-battery module output a first signal and an auxiliary power supply control signal, and the main control module selects the power supply to the main battery module based on the received first signal, the auxiliary power supply control signal and predetermined logic. Specifically, the method for turning off power to the sub-battery module involves the main control module sending a communication signal to the sub-battery module, the sub-battery module turning off load power based on the communication signal, and the main control module sending a power consumption prevention signal to the sub-power supply control circuit to turn off auxiliary power to the sub-battery module. The power consumption prevention signal has a higher priority than the auxiliary power supply control signal.

[0060] In some embodiments, the detection of the amount of electricity in the installed battery module involves specifically detecting whether the operating voltage output from the battery module is less than a threshold voltage. If it is less than the threshold voltage, the detection result indicates that the amount of electricity in the battery module is insufficient, and the threshold voltage is the power supply voltage that guarantees the normal operation of the load circuit.

[0061] The above are merely preferred embodiments of the present application and do not limit the form of the present application. As described above, the present application has been explained using preferred embodiments, but this is not intended to limit the present application. A person skilled in the art can make some modifications or changes using the above-described technical content to create embodiments with equivalent effects without departing from the scope of the technical means of the present application. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical substance of the present application, without departing from the content of the technical means of the present application, are all included within the scope of the technical means of the present application.

Claims

1. The power supply control circuit is applied to a power supply control system including a power supply control circuit, a battery module, and a main control module, A switch circuit connected between the auxiliary power supply terminal of the battery module and the main control module, A quick start circuit connected to the control terminal of the switch circuit and which generates a first switch control signal based on the quick ON signal of the main control module, A power supply detection circuit connected to the control terminal of the switch circuit, which generates a second switch control signal based on the auxiliary power supply control signal of the battery module, wherein the switch circuit conducts when either the first switch control signal or the second switch control signal indicates conduction; A power supply control circuit is characterized by including a power consumption control circuit connected to the power supply detection circuit and activating the power supply detection circuit based on a power consumption prevention signal from the main control module.

2. The rapid-start circuit includes a first switch transistor, a first resistor, and a second resistor, wherein the first switch transistor is connected between a ground terminal and a control terminal of the switch circuit, the first resistor is connected between a first port of the main control module and a control terminal of the first switch transistor, the second resistor is connected between a control terminal of the first switch transistor and a ground terminal, and the first port outputs the rapid-on signal and / or The power supply detection circuit includes a second switch transistor, a third resistor, and a fourth resistor, wherein the second switch transistor is connected between the ground terminal and the control terminal of the switch circuit, the third resistor is connected between the auxiliary power supply control terminal of the battery module and the control terminal of the second switch transistor, the fourth resistor is connected between the control terminal of the second switch transistor and the ground terminal, and the auxiliary power supply control terminal outputs the auxiliary power supply control signal and / or The power consumption control circuit includes a third switch transistor, a fifth resistor, and a sixth resistor, wherein the third switch transistor is connected between the ground terminal and the control terminal of the second switch transistor, the fifth resistor is connected between the second port of the main control module and the control terminal of the third switch transistor, the sixth resistor is connected between the control terminal of the third switch transistor and the ground terminal, and the second port outputs the power consumption prevention signal and / or The power supply control circuit according to claim 1, wherein the switch circuit includes a fourth switch transistor, a seventh resistor, and an eighth resistor, the fourth switch transistor being connected between the auxiliary power supply terminal of the battery module and the main control module, the seventh resistor having one end connected to the control terminal of the fourth switch transistor and the other end receiving the first switch control signal and the second switch control signal, and the eighth resistor being connected between the control terminal of the fourth switch transistor and the auxiliary power supply terminal.

3. The power supply control circuit according to claim 1, further comprising an installation detection circuit connected to the main control module, which generates a first signal when it detects that the battery module has been installed and generates a second signal when it detects that the battery module has been removed.

4. A power supply control circuit according to claim 1, each corresponding to one of the battery modules, A power supply control system characterized by including the main control module connected to at least two of the power supply control circuits.

5. The main control module is When it is detected that the battery module that is in a powered state has been removed, the quick-on signal is output to the quick-start circuit corresponding to the first target battery module, notifying the first target battery module that the quick-start circuit will conduct the corresponding switch circuit and start supplying power to the load circuit, and / or The power supply control system according to claim 4, characterized in that, in response to a battery switching request, it notifies the battery module that is in a powered state that it will stop supplying power to the load circuit, outputs the quick-on signal to the quick-start circuit corresponding to the second target battery module, the quick-start circuit conducts the corresponding switch circuit, and notifies the second target battery module that it will start supplying power to the load circuit.

6. The power supply control system according to claim 5, further comprising the main control module outputting the power consumption prevention signal to the power consumption control circuit corresponding to the battery module in a power supply state in response to the battery switching request, and the corresponding power supply detection circuit disconnecting the corresponding switch circuit.

7. The power supply control system according to claim 5, further comprising the main control module notifying the battery module in a power supply state that it will output an auxiliary power supply control signal in response to the battery switching request, and the corresponding power supply detection circuit disconnects the corresponding switch circuit.

8. The power supply control system according to claim 5, further characterized in that the main control module determines a third target battery module based on predetermined logic and notifies the third target battery module to start supplying power to the load circuit when the battery modules are installed and none of the battery modules are supplying power to the load circuit.

9. The power supply control system according to claim 4, further comprising a voltage conversion circuit connected between the switch circuit of each power supply control circuit and the main control module, which converts the voltage of the auxiliary power supply terminal of the battery module to the operating voltage of the main control module.

10. The power supply control system according to claim 9, characterized in that the voltage conversion circuit is further connected to the load power supply terminal of each of the battery modules, and converts the voltage of the load power supply terminal of the battery module into the operating voltage of the main control module.

11. The power supply control system according to claim 10, further comprising a one-way conductive unit connected between each of the switch circuits and the voltage conversion circuit, and connected between each of the load power supply terminals and the voltage conversion circuit.

12. Each of the aforementioned battery modules is The auxiliary power supply terminal that supplies power to the main control module, A load power supply terminal that supplies power to the aforementioned load circuit, A communication terminal connected to the main control module, The auxiliary power supply control terminal that generates the auxiliary power supply control signal, A device detection circuit that generates a first signal when it detects that the battery module has been installed, and generates a second signal when it detects that the battery module has been removed, The power supply control system according to claim 5, comprising: a control unit that, upon detecting that the battery module has been installed, outputs an auxiliary power supply control signal to the power supply detection circuit via the auxiliary power supply control terminal, instructing the switch circuit to conduct; and upon receiving a power supply notification from the main control module via the communication terminal, starts supplying power from the load power supply terminal to the load circuit.

13. The power supply control system according to claim 12, further characterized in that when the control unit receives a disconnection notification from the main control module via the communication terminal, it outputs an auxiliary power supply control signal to the power supply detection circuit via the auxiliary power supply control terminal that instructs the switch circuit to disconnect.

14. A power supply control method for a power supply control system according to any one of claims 4 to 13, Step 1 detects the installation status of the battery module, including whether the main / sub battery module is installed and the amount of electricity in the installed battery module. Based on the detection results in step 1, it is determined whether or not to switch the battery module for power supply. When both the main battery module and the sub-battery module are installed and the amount of electricity is sufficient, the main control module selects power supply from the main battery module based on predetermined logic, turns off power supply from the sub-battery module, and there is no need to switch power supplies. If both the main battery module and the sub-battery module are installed, and the main battery module has insufficient charge, but the sub-battery module has sufficient charge, then the power supply from the main battery module is turned off, and the power supply from the sub-battery module is switched on. Step 2, in which the power supply is switched to the sub-battery module when the main battery module is instantaneously switched from an installed state to an uninstalled state, The power supply by the aforementioned battery module includes step 2, which includes load power supply and auxiliary power supply, Based on the determination result in step 2, select the method for switching the battery module for power supply. When the main battery module is installed, the main control module simultaneously outputs a communication signal and a quick-on signal, the main control module transmits the communication signal to the main battery module to turn off the load power supply, transmits the quick-on signal to the power supply control circuit corresponding to the sub-battery module to turn on the auxiliary power supply, and then the main control module transmits the communication signal to the sub-battery module to turn on the load power supply, and transmits a power consumption prevention signal to the power supply control circuit corresponding to the main battery module to turn off the auxiliary power supply. A method characterized by the following steps: if the main battery module is not installed, the main control module transmits the quick ON signal to the power supply control circuit corresponding to the sub-battery module to turn on the auxiliary power supply, and then the main control module transmits the communication signal to the power supply control circuit corresponding to the sub-battery module to turn on the load power supply.

15. When both the main battery module and the sub-battery module are installed, both the main battery module and the sub-battery module output a first signal and an auxiliary power supply control signal, and the main control module selects power supply by the main battery module based on the received first signal, the auxiliary power supply control signal and the predetermined logic. The method for turning off the power supply by the sub-battery module is, specifically, that the main control module transmits the communication signal to the sub-battery module, the sub-battery module turns off the load power supply based on the communication signal, and the main control module transmits the power consumption prevention signal to the power supply control circuit corresponding to the sub-battery module to turn off the auxiliary power supply by the sub-battery module, wherein the priority of the power consumption prevention signal is higher than the priority of the auxiliary power supply control signal, as described in claim 14.

16. The power supply control method according to claim 14, characterized in that, specifically, the detection of the amount of electricity in the installed battery module involves detecting whether the operating voltage output from the battery module is smaller than a threshold voltage, and if it is smaller, the detection result is that the amount of electricity in the battery module is insufficient, and the threshold voltage is the power supply voltage that guarantees the normal operation of the load circuit.

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