Emergency power supply circuit of controller and energy storage power supply

Abstract

The invention relates to an emergency power supply circuit of a controller and an energy storage power supply. The emergency power supply circuit comprises a voltage monitoring module, an enabling module and a time-limited reset module, the voltage monitoring module is used for outputting a first level signal to the enabling module under the condition that the power supply voltage of the controller is smaller than or equal to a preset voltage; the enabling module is used for outputting a voltage signal to the time-limited reset module according to the first level signal and the battery voltage of the battery module; the time-limited reset module is used for supplying power to the controller in a time-limited manner according to the voltage signal. By adopting the method, the emergency power supply circuit continues to supply power to the controller in a time-limited manner under the condition that the auxiliary power supply system is powered down, so that control abnormity caused by sudden power down of the controller can be avoided, and the control reliability of the controller is improved.

Description

Technical Field

[0001] The present application relates to the technical field of power supply control, and particularly to an emergency power supply circuit for a controller and an energy storage power supply. Background Art

[0002] In an energy storage power supply, the auxiliary power supply system is a key point in the design. The working stability of the auxiliary power supply system determines the stability of the energy storage power supply. The auxiliary power supply system needs to ensure normal power supply to the controller in the energy storage power supply under normal operating conditions.

[0003] However, in the case of abnormal power failure of the auxiliary power supply system, the auxiliary power supply system cannot continue to supply power to the controller, resulting in abnormal control of the controller.

[0004] Therefore, there is an urgent need to provide an emergency power supply solution for the controller after the auxiliary power supply system loses power. Summary of the Invention

[0005] Based on this, the present application provides an emergency power supply circuit for a controller and an energy storage power supply, which can continue to supply power to the controller for a limited time through the emergency power supply circuit when the auxiliary power supply system loses power, thereby avoiding abnormal control caused by sudden power failure of the controller and improving the control reliability of the controller.

[0006] In a first aspect, the present application provides an emergency power supply circuit for a controller. The emergency power supply circuit includes: a voltage monitoring module, an enabling module, and a time-limited reset module; the monitoring end of the voltage monitoring module is connected to the power supply end of the controller, the output end of the voltage monitoring module is connected to the control end of the enabling module, the output end of the enabling module is connected to the input end of the time-limited reset module, the input end of the enabling module is connected to the battery module, and the output end of the time-limited reset module is connected to the power supply end of the controller;

[0007] The voltage monitoring module is configured to output a first level signal to the enabling module when the power supply voltage of the controller is less than or equal to a preset voltage;

[0008] The enabling module is configured to output a voltage signal to the time-limited reset module according to the first level signal and the battery voltage of the battery module;

[0009] The time-limited reset module is configured to supply power to the controller for a limited time according to the voltage signal.

[0010] In some embodiments, the voltage monitoring module includes a power supply monitoring unit and a signal conversion unit; the monitoring end of the power supply monitoring unit is connected to the power supply end of the controller, the output end of the power supply monitoring unit is connected to the power failure detection end of the controller, and the output end of the power supply monitoring unit is further connected to the input end of the signal conversion unit; the output end of the signal conversion unit is connected to the control end of the enabling module;

[0011] A power monitoring unit, configured to output a second level signal to a signal conversion unit when it is detected that the power supply voltage of the controller is less than or equal to a preset voltage;

[0012] A signal conversion unit, configured to output a first level signal to an enabling module according to the second level signal.

[0013] In some embodiments, the signal conversion unit includes: a first current limiting resistor, a pull-down resistor, and a triode;

[0014] The first current limiting resistor is connected between the output end of the power monitoring unit and the base of the triode; the pull-down resistor is connected between the output end of the power monitoring unit and the ground terminal; the collector and emitter of the triode are respectively connected to the control terminal of the enabling module and the ground terminal.

[0015] In some embodiments, the enabling module includes a switching control module, a voltage stabilizing module, and a voltage conversion module;

[0016] The control terminal of the switching control module is connected to the output end of the voltage monitoring module. The first conducting end and the second conducting end of the switching control module are respectively connected to the battery module and the control terminal of the voltage conversion module. The second conducting end of the switching control module is also connected to the voltage stabilizing module. The first conducting end and the second conducting end of the voltage conversion module are respectively connected to the battery module and the input end of the time-limited reset module;

[0017] The switching control module is configured to conduct according to the first level signal, so that the voltage stabilizing module outputs a target voltage to the control terminal of the voltage conversion module;

[0018] The voltage conversion module is configured to output a voltage signal to the time-limited reset module according to the target voltage.

[0019] In some embodiments, the switching control module includes a second current limiting resistor, a third current limiting resistor, and a control switch;

[0020] The second current limiting resistor is connected between the battery module and the control terminal of the control switch; the third current limiting resistor is connected between the battery module and the first conducting end of the control switch, and the second conducting end of the control switch is connected to the control terminal of the voltage conversion module.

[0021] In some embodiments, the time-limited reset module includes: a power supply control module, a time adjustment module, and a reset auxiliary module;

[0022] The control terminal of the power supply control module is connected to the time adjustment module. The first conducting end and the second conducting end of the power supply control module are respectively connected to the output end of the enabling module and the power supply terminal of the controller. The reset auxiliary module is connected between the first conducting end of the power supply control module and the time adjustment module;

[0023] A power supply control module, which is used to conduct according to a voltage signal, charge a time adjustment module, supply power to a controller, and be in a cut-off state when the voltage of the time adjustment module reaches a specified voltage, stopping supplying power to the controller;

[0024] A time adjustment module, which is used to start releasing the electric energy in the time adjustment module through a reset auxiliary module at preset time intervals when the power supply control module is in a cut-off state.

[0025] In some embodiments, the time-limited reset module further includes a first electric energy storage element and an electric energy consumption element;

[0026] Both ends of the first electric energy storage element are respectively connected between the first conducting end of the power supply control module and the ground terminal, and both ends of the electric energy consumption element are respectively connected between the first conducting end of the power supply control module and the ground terminal;

[0027] The first electric energy storage element is used to charge when the first conducting end of the power supply control module is a voltage signal, and release electric energy through the electric energy consumption element when the power supply control module is disconnected;

[0028] Wherein, at the starting moment when the enabling module stops outputting a voltage signal, the voltage difference between both ends of the first electric energy storage element is greater than the voltage difference between the first end of the reset auxiliary module and the ground terminal of the time adjustment module; the first end of the reset auxiliary module is connected to the first conducting end of the power supply control module.

[0029] In some embodiments, the time adjustment module includes a time adjustment resistor and a second electric energy storage element;

[0030] The time adjustment resistor is connected between the control end of the power supply control module and the second electric energy storage element, and the second electric energy storage element is also connected to the reset auxiliary module.

[0031] In some embodiments, the reset auxiliary module includes a diode and a voltage stabilizing tube;

[0032] The cathode of the diode is connected to the first conducting end of the power supply control module, the anode of the diode is connected to the anode of the voltage stabilizing tube, and the cathode of the voltage stabilizing tube is connected to the second electric energy storage element;

[0033] Wherein, at the starting moment when the enabling module stops outputting a voltage signal, the voltage difference between both ends of the first electric energy storage element is greater than a preset voltage difference, and the preset voltage difference is the voltage difference obtained by subtracting the target voltage of the voltage stabilizing tube and then subtracting the voltage drop of the diode from the voltage difference between both ends of the second electric energy storage element.

[0034] In a second aspect, the present application provides an energy storage power supply, which includes the emergency power supply circuit according to any one of the first aspect, a controller, an auxiliary power supply system, and a battery module; the auxiliary power supply system is connected to the power supply terminal of the controller and is used to provide a power supply voltage to the controller;

[0035] The output terminal of the emergency power supply circuit is connected to the power supply terminal of the controller, and the input terminal of the emergency power supply circuit is connected to the battery module. The emergency power supply circuit is used to supply power to the controller for a limited time according to the battery voltage provided by the battery module when the power supply voltage is less than or equal to the preset voltage.

[0036] In the technical solution provided by the embodiments of the present application, when the auxiliary power supply system loses power (that is, the connection between the auxiliary power supply system and the control circuit fails), the power supply voltage of the controller will gradually decrease from the normal value. When the power supply voltage of the controller starts to decrease to the preset voltage and has not reached 0, the voltage monitoring module outputs a first level signal, the enabling module outputs a voltage signal according to the first level signal, and the limited-time reset module supplies power to the controller for a limited time according to the voltage signal. In this way, although the auxiliary power supply system has lost power, the controller can still execute the relevant operations after power loss through the limited-time reset module supplying power to the controller for a limited time, avoiding abnormal control caused by sudden power loss of the controller and improving the control reliability of the controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for describing the embodiments of the present application or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 Schematic diagram of the emergency power supply circuit of the controller provided in the first embodiment;

[0039] Figure 2 Schematic diagram of the emergency power supply circuit of the controller provided in the second embodiment;

[0040] Figure 3 Schematic diagram of the emergency power supply circuit of the controller provided in the third embodiment;

[0041] Figure 4 Schematic diagram of the emergency power supply circuit of the controller provided in the fourth embodiment;

[0042] Figure 5 Schematic diagram of the emergency power supply circuit of the controller provided in the fifth embodiment;

[0043] Figure 6 Schematic diagram of the energy storage power supply provided in some embodiments. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description of the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0046] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality" means more than two unless otherwise specifically defined. In the description of the embodiments of this application, "each" means each or every one of a plurality unless otherwise specifically defined.

[0047] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0048] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0049] In order to solve the problem that the auxiliary power supply system has an abnormal power failure and the auxiliary power supply system cannot continue to supply power to the controller, resulting in abnormal control of the controller, in some solutions, a scheme is proposed in which two power supply modules respectively use two different power conversion circuits to supply power to the controller, so that when one power supply module has an abnormal power failure, the other power supply module can still supply power to the controller.

[0050] However, in the above-provided solution, one of the dual power supply modules is an auxiliary power supply system, and the other newly added power supply module is generally a button battery, a lithium battery, or a supercapacitor. The added button battery, lithium battery, or supercapacitor all belong to energy storage devices that need to be additionally added, which will lead to an increase in material costs; the two power conversion circuits used to connect the two power supply modules and the controller need to work continuously, resulting in an increase in the power consumption of the circuit; and, it is also impossible to provide an effective power anomaly signal to the controller. When the auxiliary power supply system loses power, the controller cannot accurately know the moment when the auxiliary power supply system loses power, making it difficult to effectively perform relevant operations after power-off. For example, the relevant operations include completing the current operation instruction (such as the currently unfinished operation instruction), detecting the system fault type and sending the fault signal to the controller of the next node, and performing at least one of the operations such as storing key information before performing the shutdown operation.

[0051] Figure 1 Schematic diagram of the emergency power supply circuit of the controller provided for the first embodiment, as Figure 1 shown, the emergency power supply circuit includes: a voltage monitoring module, an enabling module, and a time-limited reset module; the monitoring terminal of the voltage monitoring module is connected to the power supply terminal of the controller, the output terminal of the voltage monitoring module is connected to the control terminal of the enabling module, the output terminal of the enabling module is connected to the input terminal of the time-limited reset module, the input terminal of the enabling module is connected to the battery module, and the output terminal of the time-limited reset module is connected to the power supply terminal of the controller.

[0052] The voltage monitoring module is used to output a first level signal to the enabling module when the power supply voltage of the controller is less than or equal to the preset voltage; the enabling module is used to output a voltage signal to the time-limited reset module according to the first level signal and the battery voltage of the battery module; the time-limited reset module is used to supply power to the controller within a limited time according to the voltage signal.

[0053] The controller may be included in the energy storage power supply and can be used to handle tasks generated by the energy storage power supply. In some embodiments, the controller may include the integration of one or at least two of the following: Microcontroller Unit (MCU), general-purpose processor, Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), Central Processing Unit (CPU), Graphics Processing Unit (GPU), Neural-network Processing Units (NPU), microprocessor, programmable logic device, discrete gate or transistor logic device, discrete hardware component, quantum computing-based data processing logic unit, Artificial Intelligence (AI) processor, etc.

[0054] In some embodiments, the power supply terminal of the controller is also connected to the auxiliary power supply system. Among them, the auxiliary power supply system can be a power supply system capable of providing voltage output. In some embodiments, the auxiliary power supply system may include a main auxiliary power supply system. The input end of the main auxiliary power supply system is connected to the battery module, and the output end of the main auxiliary power supply system is connected to the power supply terminal of the controller. The main auxiliary power supply system can provide a stable voltage to the controller according to the battery voltage provided by the battery module. In some embodiments, the auxiliary power supply system may include a low-power auxiliary power supply system. The input end of the low-power auxiliary power supply system is connected to the battery module, and the output end of the low-power auxiliary power supply system is connected to the power supply terminal of the controller. The low-power auxiliary power supply system can supply power to the controller with low power consumption according to the battery voltage provided by the battery module. The voltage provided by the main auxiliary power supply system to the controller is greater than the voltage provided by the low-power auxiliary power supply system to the controller.

[0055] The battery module can be an existing power supply module in the energy storage power supply. Exemplarily, the battery module can be a storage battery in the energy storage power supply.

[0056] The voltage monitoring module may include a voltage monitoring chip.

[0057] The preset voltage can be a voltage greater than 0. Exemplarily, the preset voltage can be greater than 0 and less than the rated supply voltage (for example, the operating voltage at which the controller operates normally). For example, the preset voltage can be the average value between 0 and the rated supply voltage, or the preset voltage can be the difference between the rated supply voltage and the voltage offset value. The voltage monitoring module is further configured to output a second level signal to the enabling module or not output a level signal when the supply voltage of the controller is greater than the preset voltage.

[0058] The supply voltage of the controller being less than or equal to the preset voltage indicates that the supply voltage of the power supply module is abnormal, and the supply voltage of the controller being greater than the preset voltage indicates that the supply voltage of the power supply module is normal.

[0059] The battery voltage of the battery module can be different from the normal value (also referred to as the rated supply voltage) of the supply voltage of the controller. The voltage signal output by the enabling module can be a voltage signal with a fixed value and does not change with the change of the battery voltage of the battery module. In some embodiments, the voltage output by the enabling module can be the rated supply voltage or can be the rated supply voltage plus the voltage drop generated by the time-limited reset module.

[0060] The time-limited reset module can enter the conductive state according to the voltage signal, and the time-limited reset module in the conductive state can supply power to the controller for a limited time (i.e., supply power to the controller within a limited time period). Exemplarily, the voltage at which the time-limited reset module supplies power to the controller can be the rated supply voltage or a voltage lower than the rated supply voltage, and a voltage lower than the rated supply voltage can enable the controller to perform related operations after power-off. After the time-limited power supply ends, the time-limited reset module enters the non-conductive state to achieve reset after the time-limited power supply ends. The time-limited reset module can supply power within a limited time period and reset after the limited time period, where the limited time period can be determined according to the attributes of the time-limited reset module. The time-limited reset module enters from the first state to the second state according to the voltage signal. In the first state, the time-limited reset module is not conducting, and in the second state, the time-limited reset module is conducting. When the duration of the time-limited reset module in the second state reaches the limited time period, the time-limited reset module resets to the first state.

[0061] The time-limited power supply to the controller is achieved through the time-limited reset module, so that the controller can perform related operations after power-off within a limited time period, minimizing the impact on the power supply of the battery module as much as possible, and also being able to solve the situation where when the auxiliary power supply system is about to lose power, there is no other power supply, resulting in the controller being unable to perform related operations after power-off.

[0062] In some embodiments, the first level signal is a low level signal. In other embodiments, the first level signal can be a high level signal.

[0063] In the technical solution provided by the embodiments of the present application, when the auxiliary power supply system loses power (i.e., the connection between the auxiliary power supply system and the control circuit fails), the supply voltage of the controller will gradually decrease from the normal value. When the supply voltage of the controller starts to decrease to the preset voltage and has not reached 0, the voltage monitoring module outputs a first level signal, the enabling module outputs a voltage signal according to the first level signal, and the time-limited reset module supplies power to the controller for a limited time according to the voltage signal. In this way, although the auxiliary power supply system has lost power, the controller can still execute the relevant operations after power-off through the time-limited reset module supplying power to the controller for a limited time, avoiding abnormal control caused by sudden power-off of the controller and improving the control reliability of the controller.

[0064] Figure 2 FIG. is a schematic structural diagram of an emergency power supply circuit for a controller provided in the second embodiment, as Figure 2 shown, Figure 2 The difference between the embodiment and Figure 1 the embodiment is that the voltage monitoring module includes a power supply monitoring unit and a signal conversion unit; the monitoring end of the power supply monitoring unit is connected to the power supply end of the controller, the output end of the power supply monitoring unit is connected to the power-off detection end of the controller, and the output end of the power supply monitoring unit is also connected to the input end of the signal conversion unit; the output end of the signal conversion unit is connected to the control end of the enabling module;

[0065] The power supply monitoring unit is configured to output a second level signal to the signal conversion unit when it monitors that the supply voltage of the controller is less than or equal to the preset voltage; the signal conversion unit is configured to output a first level signal to the enabling module according to the second level signal.

[0066] Among them, the power supply monitoring unit can be a power supply monitor. The power supply monitoring unit is configured to output a second level signal to the signal conversion unit and output a second level signal to the controller when the supply voltage of the controller is less than or equal to the preset voltage. The controller can determine that the auxiliary power supply system has lost power according to the second level signal and start to execute the relevant operations after power-off. The power supply monitoring unit can also be connected to the ground terminal.

[0067] In some embodiments, the first level signal is a low level signal and the second level signal is a high level signal. In other embodiments, the first level signal is a high level signal and the second level signal is a low level signal.

[0068] Among them, the power supply monitoring unit is also configured to output a second level signal to the power-off detection end of the controller.

[0069] In some embodiments, the power supply monitoring unit is also grounded. In some embodiments, the controller is also connected to the ground terminal.

[0070] Among them, the signal conversion unit may include a triode or a field-effect transistor. Exemplarily, the signal conversion unit may include an N-type triode.

[0071] In the technical solution provided by the embodiment of the present application, by setting the power supply monitoring unit, when the power supply voltage of the controller is greater than the preset voltage, the power supply monitoring unit does not output a level signal (or outputs a first level signal), reducing the power consumption of the power supply monitoring unit. When the power supply voltage of the controller is less than or equal to the preset voltage, the power supply monitoring unit outputs a second level signal, so that, through the second level signal, the signal conversion unit outputs a first level signal, realizing the emergency power supply of the controller and improving the effectiveness of control.

[0072] Please continue to refer to Figure 2 , the signal conversion unit includes: a first current-limiting resistor R1, a pull-down resistor R2, and a triode Q1; the first current-limiting resistor R1 is connected between the output end of the power supply monitoring unit and the base of the triode Q1; the pull-down resistor R2 is connected between the output end of the power supply monitoring unit and the ground terminal; the collector and emitter of the triode Q1 are respectively connected to the output end of the enabling module and the ground terminal.

[0073] Among them, the triode Q1 in the signal conversion unit may be an N-type triode.

[0074] In the technical solution provided by the embodiment of the present application, when the level signal output by the signal conversion unit is a low-level signal or does not output a level signal, through the pull-down resistor R2, it can be reliably ensured that the level of the end of the power supply monitoring unit connected to the signal conversion unit is a low level, achieving a filtering effect. By setting the first current-limiting resistor R1 at the base of the triode Q1, it can prevent the base current from being too large and causing the triode Q1 to burn out.

[0075] Figure 3 It is a schematic structural diagram of the emergency power supply circuit of the controller provided in the third embodiment, as Figure 3 shown, Figure 3 The difference between this embodiment and Figure 1 the embodiment is that the enabling module includes a turn-on / off control module, a voltage stabilization module, and a voltage conversion module.

[0076] The control end of the turn-on / off control module is connected to the output end of the voltage monitoring module. The first conducting end and the second conducting end of the turn-on / off control module are respectively connected to the control ends of the battery module and the voltage conversion module. The second conducting end of the turn-on / off control module is also connected to the voltage stabilization module; the first conducting end and the second conducting end of the voltage conversion module are respectively connected to the battery module and the input end of the time-limited reset module.

[0077] The on-off control module is used to conduct according to the first level signal, so that the voltage stabilization module outputs a target voltage to the control end of the voltage conversion module. The voltage conversion module is used to output a voltage signal to the time-limited reset module according to the target voltage.

[0078] In some embodiments, the first end of the voltage stabilization module is connected to the second conducting end of the controller, and the second end of the voltage stabilization module is connected to the ground end.

[0079] In some embodiments, the on-off control module is used to conduct the first conducting end and the second conducting end of the on-off control module according to the first level signal, so that the voltage stabilization module breaks down, and the voltage at the first end of the voltage stabilization module is clamped at the target voltage; the voltage conversion module is used to output a voltage signal to the time-limited reset module according to the target voltage.

[0080] In some embodiments, the controller is also connected to the ground end.

[0081] In the technical solution provided by the embodiment of the present application, the enabling module includes an on-off control module, a voltage stabilization module, and a voltage conversion module. The on-off control module conducts the battery module and the voltage stabilization module when obtaining the first level signal, so that the voltage stabilization module breaks down, and the voltage at the first end of the voltage stabilization module is clamped at the target voltage, so that the voltage conversion module outputs a fixed voltage signal to the time-limited reset module according to the fixed target voltage. Therefore, the magnitude of the voltage signal output by the enabling module to the time-limited reset module is determined according to the set attributes of the voltage stabilization module and the voltage conversion module, and has nothing to do with the magnitude of the voltage of the battery module, avoiding the influence of the voltage fluctuation of the battery module on the voltage signal output by the enabling module and improving the stability of the voltage signal output.

[0082] Please continue to refer to Figure 3 , the on-off control module includes a second current-limiting resistor R3, a third current-limiting resistor R4, and a control switch Q2. Exemplarily, the control switch can be a P-type metal-oxide-semiconductor field-effect transistor (MOS) or an NMOS. The second current-limiting resistor R3 is connected between the battery module and the control end of the control switch (for example, the gate of the PMOS); the third current-limiting resistor R4 is connected between the battery module and the first conducting end of the control switch Q2 (for example, the source of the PMOS), and the second conducting end of the control switch Q2 (for example, the drain of the PMOS) is connected to the control end of the voltage conversion module.

[0083] In the technical solution provided by the embodiment of the present application, by setting the second current-limiting resistor R3, it is possible to prevent the phenomenon that the control switch Q2 is easily damaged due to excessive current input to the control terminal of the control switch Q2; by setting the third current-limiting resistor R4, the battery module provides current to the control terminal of the voltage conversion module through the third current-limiting resistor R4 (for example, provides current to the base of the N-type triode Q3), which can prevent the phenomenon that the N-type triode Q3 is easily damaged due to excessive current provided to the base of the N-type triode Q3, and can limit the current provided to the voltage stabilizing module (such as the voltage stabilizing diode ZD).

[0084] Please continue to refer to Figure 3 , the voltage conversion module includes an N-type triode Q3 and a fourth current-limiting resistor R5. The first end of the fourth current-limiting resistor R5 is connected to the battery module, the second end of the fourth current-limiting resistor R5 is connected to the collector of the N-type triode Q3, the base of the N-type triode Q3 is connected to the first end of the voltage stabilizing module, and the emitter of the N-type triode Q3 is connected to the input end of the time-limited reset module.

[0085] Please continue to refer to Figure 3 , the voltage stabilizing module may include a voltage stabilizing device ZD1 (the voltage stabilizing device may include a voltage stabilizing diode) and a base pull-down resistor R6 of the N-type triode Q3. The first end of the voltage stabilizing device ZD1 is connected to the base of the N-type triode Q3, the second end of the voltage stabilizing device ZD1 is connected to the ground terminal, the first end of the base pull-down resistor R6 of the N-type triode Q3 is connected to the base of the N-type triode Q3, and the second end of the base pull-down resistor R6 of the N-type triode Q3 is connected to the ground terminal.

[0086] Figure 4 The structural schematic diagram of the emergency power supply circuit of the controller provided for the fourth embodiment is as Figure 4 shown Figure 4 The difference between the embodiment and Figure 1 the embodiment is that the time-limited reset module includes: a power supply control module, a time adjustment module, and a reset auxiliary module.

[0087] The control terminal of the power supply control module is connected to the time adjustment module, the first conduction terminal and the second conduction terminal of the power supply control module are respectively connected to the output terminal of the enable module and the power supply terminal of the controller; the reset auxiliary module is connected between the first conduction terminal of the power supply control module and the time adjustment module.

[0088] In some embodiments, the first end of the time adjustment module is connected to the control terminal of the power supply control module, the second end of the time adjustment module is connected to the ground terminal, and the third end of the time adjustment module is connected to the reset auxiliary module.

[0089] In some embodiments, the first end of the reset auxiliary module is connected to the first conduction terminal of the power supply control module, and the second end of the reset auxiliary module is connected to the third end of the time adjustment module.

[0090] The power supply control module is used to conduct according to the voltage signal, charge the time adjustment module, supply power to the controller, and when the voltage at the first end of the time adjustment module reaches the specified voltage, the power supply control module is in the cut-off state and stops supplying power to the controller; the time adjustment module is used to start releasing the electric energy in the time adjustment module through the reset auxiliary module after a preset time interval when the power supply control module is in the cut-off state.

[0091] Among them, the power supply control module may include a triode. For example, the power supply control module may be a P-type triode. In some embodiments, the controller is also connected to the ground terminal.

[0092] In some other embodiments, the time-limited reset module may include a power supply control module and a time adjustment module. The control terminal of the power supply control module is connected to the first end of the time adjustment module. The first conduction terminal and the second conduction terminal of the power supply control module are respectively connected to the output terminal of the enable module and the power supply terminal of the controller; the second end of the time adjustment module is connected to the ground terminal; the power supply control module is used to conduct according to the voltage signal, charge the time adjustment module, supply power to the controller, and when the voltage at the first end of the time adjustment module reaches the specified voltage, the power supply control module is in the cut-off state and stops supplying power to the controller.

[0093] In the technical solution provided by the embodiment of the present application, through the time-limited reset module including the power supply control module, the time adjustment module and the reset auxiliary module, through the mutual cooperation of the power supply control module, the time adjustment module and the reset auxiliary module, the time-limited power supply of the time-limited reset module to the controller is realized, and the reliability of the time-limited power supply is improved; and the power supply control module, the time adjustment module and the reset auxiliary module are all passive devices and do not require additional power supply, which not only simplifies the design, but also improves the stability and environmental adaptability of the system; in addition, the time adjustment module starts to release the electric energy in the time adjustment module through the reset auxiliary module after a preset time interval, so that within the preset time interval, even if the auxiliary power supply system loses power again, the power supply control module still cannot conduct, avoiding the situation that the battery module needs to continuously supply power after the auxiliary power supply system loses power, which not only cannot enable the controller to smoothly execute the relevant operations after power failure, but also has a long-term impact on the battery module. Therefore, the embodiment of the present application can improve the reliability of the power failure control of the auxiliary power supply system.

[0094] Please continue to refer to Figure 4 , in some embodiments, the time-limited reset module further includes a first electric energy storage element (such as capacitor C1) and an electric energy consumption element (such as discharge resistor R7).

[0095] Both ends of the first electrical energy storage element are respectively connected to the first conduction end and the ground end of the power supply control module, and both ends of the electrical energy consumption element are respectively connected to the first conduction end and the ground end of the power supply control module;

[0096] The first electrical energy storage element is used to charge when the first conduction end of the power supply control module is a voltage signal, and release electrical energy through the electrical energy consumption element when the power supply control module is disconnected; the moment when the time adjustment module starts to release electrical energy is the moment when the voltage difference between both ends of the first electrical energy storage element is less than the voltage difference between the first end of the reset auxiliary module and the ground end of the time adjustment module.

[0097] Among them, at the starting moment when the enabling module stops outputting the voltage signal, the voltage difference between both ends of the first electrical energy storage element is greater than the voltage difference between the first end of the reset auxiliary module and the ground end of the time adjustment module; the first end of the reset auxiliary module is connected to the first conduction end of the power supply control module.

[0098] In the technical solution provided by the embodiment of the present application, by setting the first electrical energy storage element and the electrical energy consumption element, the first electrical energy storage element can start to release the electrical energy of the first electrical energy storage element when the output end of the enabling module stops outputting the voltage, until the voltage between both ends of the first electrical energy storage element is less than the voltage difference between the first end of the reset auxiliary module and the ground end of the time adjustment module, and the time adjustment module starts to release the electrical energy in the time adjustment module through the reset auxiliary module. Therefore, through the cooperation of the first electrical energy storage element and the electrical energy consumption element, the time when the time adjustment module starts to release the electrical energy in the time adjustment module through the reset auxiliary module can be limited, thereby avoiding the situation that the battery module needs to continuously supply power after the auxiliary power supply system loses power.

[0099] Please continue to refer to Figure 4 , in some embodiments, the time adjustment module includes a time adjustment resistor R8 and a second electrical energy storage element (such as a capacitor C2); the time adjustment resistor R8 is connected between the control end of the power supply control module and the first end of the second electrical energy storage element, the first end of the second electrical energy storage element is also connected to the second end of the reset auxiliary module, and the second end of the second electrical energy storage element is connected to the ground end.

[0100] In the technical solution provided by the embodiment of the present application, by setting the time adjustment resistor R8 and the second electrical energy storage element, the limiting duration of power supply can be limited through the attributes of the time adjustment resistor R8 and the second electrical energy storage element, improving the reliability of limited-time power supply.

[0101] Please continue to refer to Figure 4, in some embodiments, the reset assist module includes a diode D1 and a voltage regulator device ZD2. The cathode of the diode D1 is connected to the first conduction end of the power supply control module, the anode of the diode D1 is connected to the anode of the voltage regulator device ZD2, and the cathode of the voltage regulator device ZD2 is connected to the first end of the second energy storage element.

[0102] Wherein, at the starting moment when the enable module stops outputting the voltage signal, the voltage difference across the first energy storage element is greater than a preset voltage difference, and the preset voltage difference is the voltage difference obtained by subtracting the target voltage of the voltage regulator diode from the voltage difference across the second energy storage element and then subtracting the voltage drop of the diode.

[0103] In the technical solution provided by the embodiments of the present application, the reset assist module includes a diode D1 and a voltage regulator device ZD2. When the enable module outputs a voltage signal, the generated current does not output to the second energy storage element through the reset assist module, but flows to the second energy storage element through the power supply control module, and the current flowing through the power supply control module to the second energy storage element is very small, thereby realizing the slow charging of the second energy storage element, enabling the power supply control module to conduct during the charging process of the second energy storage element (the corresponding duration is the limited duration), and improving the effectiveness of emergency power supply to the controller; and by setting the connection mode of the voltage regulator device ZD2 and the diode D1, the voltage regulator device ZD2 can be reversely broken down, so that the electric energy of the second energy storage element can be released through the voltage regulator device ZD2, the diode D1 and the electric energy consumption element, enabling the limited-time reset module to reset.

[0104] Figure 5 FIG. is a schematic structural diagram of an emergency power supply circuit for a controller provided in the fifth embodiment, as Figure 5 shown, the emergency power supply circuit includes a voltage monitoring module, an enable module, and a limited-time reset module.

[0105] In some embodiments, the emergency power supply circuit further includes an energy storage capacitor C0. The first end of the energy storage capacitor C0 is connected to the auxiliary power supply system, the first end of the energy storage capacitor C0 is also connected to the power supply terminal of the controller, and the second end of the energy storage capacitor C0 is connected to the ground terminal. By providing the energy storage capacitor C0, the auxiliary power supply system can charge the energy storage capacitor C0 when there is no power failure. In the case of a power failure of the energy storage power supply system, the energy storage capacitor C0 can supply power to the controller so that the power supply of the controller can be maintained until the limited-time reset module of the emergency power supply circuit supplies power to the controller for a limited time.

[0106] The voltage monitoring module includes a power supply monitoring unit (such as a power supply monitoring device), a first current-limiting resistor R1, a pull-down resistor R2, and an N-type triode Q1. The power supply monitoring unit is connected to the VCC_MCU power supply (i.e., the power supply terminal of the controller), and monitors the VCC_MCU voltage value in real time. When the VCC_MCU power supply voltage value is lower than the normal value (i.e., the above-mentioned preset voltage), it outputs a POW_OF signal (high level, i.e., the above-mentioned second-level signal) representing that the VCC_MCU voltage value is abnormal. The N-type triode Q1 conducts, and the POW_EN signal is pulled down to the ground, enabling the enabling module and providing emergency power supply for the VCC_MCU power supply. Among them, the first current-limiting resistor R1 is the first current-limiting resistor of the N-type triode Q1. The pull-down resistor R2 can reliably ensure that the POW_OF signal is at a low level when the POW_OF signal is low, playing a filtering effect.

[0107] The POW_OF signal is also connected to the input / output (I / O) detection port (i.e., the power-off detection terminal of the above-mentioned controller) of the controller (such as the main control MCU). When the power supply monitoring unit detects an abnormal fault, it outputs a high level. After the controller determines that the POW_OF signal is at a high level, it performs operations related to abnormal power-off protection, that is, when the VCC_MCU power supply has an abnormal power-off, the controller can quickly detect the abnormal state. Exemplarily, by selecting a suitable voltage monitoring value for the power supply monitoring unit, the controller can work stably during the process of continuing to supply power in the power-off emergency power supply circuit.

[0108] The battery module (such as a battery pack) is a lithium battery pack of the energy storage system, which performs functions of electrical energy storage and discharge and is an important part of the energy storage system. The total output voltage of the battery module is VBAT.

[0109] The enabling module includes a second current-limiting resistor R3, a third current-limiting resistor R4, a fourth current-limiting resistor R5, a pull-down resistor R6, an N-type triode Q3, a control switch Q2, and a voltage regulator device ZD1.

[0110] The POW_EN signal is used to control the turning on and off of the control switch Q2. When the triode Q1 is not conducting, the POW_EN signal is pulled up to the high level of VBAT; when the triode Q1 is conducting, the POW_EN signal is pulled down to the low level. Then when the POW_EN signal is at the low level, the control switch Q2 conducts, and the VBAT voltage passes through the third current-limiting resistor R4, the control switch Q2, and the voltage regulator ZD1. The voltage regulator ZD1 breaks down, and the base of the N-type triode Q3 is clamped at the target voltage of the voltage regulator ZD1. The VC1 voltage is the target voltage of the voltage regulator ZD1 minus the emitter voltage drop of the N-type triode Q3 (exemplarily, the typical value is 0.7V). Exemplarily, by selecting the target voltage of the voltage regulator ZD1, the desired VCC_MCU voltage can be obtained after passing through the enabling module; that is, when the POW_EN signal is at the low level, the enabling module effectively outputs the VC1 voltage.

[0111] On the contrary, when the POW_EN signal is at the high level, the control switch Q2 is turned off, and the base of the N-type triode Q3 is pulled to the ground terminal (GND) by the pull-down resistor R6. The N-type triode Q3 is turned off, so at this time the VC1 voltage is 0V; that is, when the POW_EN signal is at the high level, the enabling module has no output voltage (or stops outputting the voltage signal, or does not output the voltage signal).

[0112] Among them, the fourth current-limiting resistor R5 is the fourth current-limiting resistor, which serves to share the voltage across the N-type triode Q3 during linear voltage reduction; the second current-limiting resistor R3 is the second current-limiting resistor, which pulls up the control terminal of the control switch Q2 to VBAT when the N-type triode Q1 in the voltage monitoring module is cutoff, preventing the control switch Q2 from being accidentally turned on; the pull-down resistor R6 is the pull-down resistor for the base of the N-type triode Q3. When the control switch Q2 is cutoff, the third current-limiting resistor R4 provides current I for the emitter of the N-type triode Q3 B . Since the N-type triode Q3 operates in the amplification state, the current between the collector C and the emitter E is I C =I B * h (h is the amplification factor of the triode), and the selection of the resistance value of the fourth current-limiting resistor R5 determines the power supply current capacity of the voltage conversion module for voltage reduction.

[0113] The time-limited reset module includes a capacitor C1, a discharge resistor R7, a diode D1, a voltage regulator ZD2, a P-type triode Q4, a time adjustment resistor R8, and a capacitor C2. When the enabling module outputs an effective VC1 voltage, the VC1 voltage charges the capacitor C2 through the emitter of the P-type triode Q4 and the time adjustment resistor R8, and the P-type triode Q4 conducts. The VC1 voltage charges the capacitor C1 and supplies power to the controller; when the RC time adjustment capacitor C2 is fully charged, the P-type triode Q4 cutoff. If the auxiliary power supply system is still in the non-powered state at this time, the controller will be completely powered down, thus playing the role of time-limited power supply.

[0114] The time-adjusting resistor R8 and capacitor C2 set the conduction time of the P-type triode Q4; at the beginning of the design, the duration for the controller to complete relevant operations after an emergency abnormal power failure of the auxiliary power supply system was calculated, and the discharging resistor R7 and capacitor C2 were adjusted to meet the required duration; the diode D1 and the voltage regulator ZD2 provide a reset function for the RC time-adjusting circuit; when the voltage VC1 charges the capacitor C1 and supplies power to the controller, and after the VCC_MCU voltage returns to normal, the power monitor outputs a normal POW_OF signal (the normal POW_OF signal is at a low level, and the abnormal POW_OF signal is at a high level), the POW_EN signal changes to high, controlling the switch Q2 to cut off, the enabling module stops working, the N-type triode Q3 turns off, and the voltage VC1 across the capacitor C1 discharges through the discharging resistor R7. When the voltage drop of the voltage VC1 across the capacitor C1 is lower than the voltage across the capacitor C2 minus the target voltage of the voltage regulator ZD2 and then minus the voltage drop of the diode D1, the capacitor C2 starts to discharge and reset.

[0115] The design and selection of the discharging resistor R7, capacitor C1, and capacitor C2 are combined with the capacitance of the capacitor C1 for selection; when an abnormal power failure occurs and the power monitoring unit detects that VCC_MCU is under-voltage (i.e., when the VCC_MCU voltage value is lower than the normal value) and outputs a high-level POW_OF, after the enabling module performs a single operation and the VCC_MCU voltage returns to normal, the high-level POW_OF changes to low level, the enabling module stops working, and the discharging resistor R7 starts to discharge the capacitor C1. The resistance value of the discharging resistor R7 and the capacitance value of the capacitor C1 can be designed such that the duration required for the capacitor C1 to discharge to a voltage lower than the voltage across the capacitor C2 minus the target voltage of the voltage regulator ZD2 and then minus the voltage drop of the diode D1 is longer than the time when VCC_MCU has a second under-voltage, so that when VCC_MCU has a second under-voltage, the capacitor C2 has not been reset. Since the capacitor C2 has not been reset when VCC_MCU has a second under-voltage, although the enabling module enables again to output an effective VC1 voltage, the capacitor C2 has not been reset, the P-type triode Q4 cannot conduct again, and the VCC_MCU voltage is continuously consumed to a value below the voltage at which both the power monitoring unit and the controller stop working, and the energy storage system completely shuts down.

[0116] The emergency power supply circuit provided by the embodiment of the present application realizes an emergency power supply design by utilizing the energy in the battery module in the case of an abnormal power failure of the auxiliary power supply system.

[0117] Through the time-limited reset module, during the abnormal power failure of the auxiliary power supply system, the emergency power supply circuit only performs a single power supply. After completing a single power supply, the circuit disconnects the battery pack, and the entire circuit no longer consumes the energy of the battery pack, effectively saving the energy of the system.

[0118] The emergency power supply circuit provided by the embodiment of the present application has a low circuit power consumption because the entire hardware circuit only works for a short time during the abnormal power failure of the auxiliary power supply system.

[0119] Figure 6 A schematic structural diagram of the energy storage power supply provided for some embodiments is as Figure 6 shown. The energy storage power supply includes the emergency power supply circuit, a controller, an auxiliary power supply system, and a battery module in any of the above embodiments. The auxiliary power supply system is connected to the power supply terminal of the controller and is used to provide a power supply voltage to the controller;

[0120] The output terminal of the emergency power supply circuit is connected to the power supply terminal of the controller, and the input terminal of the emergency power supply circuit is connected to the battery module. The emergency power supply circuit is used to supply power to the controller within a limited time according to the battery voltage provided by the battery module when the power supply voltage is less than or equal to a preset voltage.

[0121] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope recorded in the present application.

[0122] The above embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed. However, it should not be understood as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An emergency power supply circuit for a controller, characterized in that, The emergency power supply circuit includes: a voltage monitoring module, an enabling module, and a time-limited reset module; the monitoring terminal of the voltage monitoring module is connected to the power supply terminal of the controller, the output terminal of the voltage monitoring module is connected to the control terminal of the enabling module, the output terminal of the enabling module is connected to the input terminal of the time-limited reset module, the input terminal of the enabling module is connected to the battery module, and the output terminal of the time-limited reset module is connected to the power supply terminal of the controller; The voltage monitoring module is configured to output a first level signal to the enabling module when the power supply voltage of the controller is less than or equal to a preset voltage; The enabling module is configured to output a voltage signal to the time-limited reset module according to the first level signal and the battery voltage of the battery module; The time-limited reset module is configured to supply power to the controller within a time limit according to the voltage signal.

2. The emergency power supply circuit according to claim 1, characterized in that, The voltage monitoring module includes a power supply monitoring unit and a signal conversion unit; the monitoring terminal of the power supply monitoring unit is connected to the power supply terminal of the controller, the output terminal of the power supply monitoring unit is connected to the power-down detection terminal of the controller, and the output terminal of the power supply monitoring unit is further connected to the input terminal of the signal conversion unit; the output terminal of the signal conversion unit is connected to the control terminal of the enabling module; The power supply monitoring unit is configured to output a second level signal to the signal conversion unit when it detects that the power supply voltage of the controller is less than or equal to the preset voltage; The signal conversion unit is configured to output the first level signal to the enabling module according to the second level signal.

3. The emergency power supply circuit according to claim 2, characterized in that, The signal conversion unit includes: a first current-limiting resistor, a pull-down resistor, and a triode; The first current-limiting resistor is connected between the output terminal of the power supply monitoring unit and the base of the triode; the pull-down resistor is connected between the output terminal of the power supply monitoring unit and the ground terminal; the collector and emitter of the triode are respectively connected to the control terminal of the enabling module and the ground terminal.

4. The emergency power supply circuit according to any one of claims 1 to 3, characterized in that The enabling module includes a on-off control module, a voltage stabilizing module, and a voltage conversion module; The control terminal of the on-off control module is connected to the output terminal of the voltage monitoring module, the first conducting terminal and the second conducting terminal of the on-off control module are respectively connected to the battery module and the control terminal of the voltage conversion module, and the second conducting terminal of the on-off control module is further connected to the voltage stabilizing module; the first conducting terminal and the second conducting terminal of the voltage conversion module are respectively connected to the battery module and the input terminal of the time-limited reset module; The on-off control module is configured to conduct according to the first level signal, so that the voltage stabilizing module outputs a target voltage to the control terminal of the voltage conversion module; The voltage conversion module is configured to output the voltage signal to the time-limited reset module according to the target voltage.

5. The emergency power supply circuit according to claim 4, wherein The on-off control module includes a second current-limiting resistor, a third current-limiting resistor, and a control switch; The second current-limiting resistor is connected between the battery module and the control end of the control switch; the third current-limiting resistor is connected between the battery module and the first conducting end of the control switch, and the second conducting end of the control switch is connected to the control end of the voltage conversion module.

6. The emergency power supply circuit according to any one of claims 1 to 3, characterized in that, The time-limited reset module includes: a power supply control module, a time adjustment module, and a reset auxiliary module; The control end of the power supply control module is connected to the time adjustment module, and the first conducting end and the second conducting end of the power supply control module are respectively connected to the output end of the enable module and the power supply end of the controller; the reset auxiliary module is connected between the first conducting end of the power supply control module and the time adjustment module; The power supply control module is configured to conduct according to the voltage signal, charge the time adjustment module, supply power to the controller, and be in a cut-off state when the voltage of the time adjustment module reaches a specified voltage, and stop supplying power to the controller; The time adjustment module is configured to start releasing the electric energy in the time adjustment module through the reset auxiliary module at a preset time interval when the power supply control module is in a cut-off state.

7. The emergency power supply circuit according to claim 6, characterized in that, The time-limited reset module further includes a first electric energy storage element and an electric energy consumption element; Two ends of the first electric energy storage element are respectively connected between the first conducting end of the power supply control module and the ground end, and two ends of the electric energy consumption element are respectively connected between the first conducting end of the power supply control module and the ground end; The first electric energy storage element is configured to charge when the first conducting end of the power supply control module is the voltage signal, and release electric energy through the electric energy consumption element when the power supply control module is disconnected; Wherein, at the starting moment when the enable module stops outputting the voltage signal, the voltage difference between two ends of the first electric energy storage element is greater than the voltage difference between the first end of the reset auxiliary module and the ground end of the time adjustment module; the first end of the reset auxiliary module is connected to the first conducting end of the power supply control module.

8. The emergency power supply circuit according to claim 7, characterized in that, The time adjustment module includes a time adjustment resistor and a second electric energy storage element; The time adjustment resistor is connected between the control end of the power supply control module and the second electric energy storage element, and the second electric energy storage element is further connected to the reset auxiliary module.

9. The emergency power supply circuit according to claim 8, wherein, The reset auxiliary module includes a diode and a voltage stabilizing tube; The cathode of the diode is connected to the first conducting end of the power supply control module, the anode of the diode is connected to the anode of the voltage stabilizing tube, and the cathode of the voltage stabilizing tube is connected to the second electric energy storage element; Wherein, at the starting moment when the enable module stops outputting the voltage signal, the voltage difference between two ends of the first electric energy storage element is greater than a preset voltage difference, and the preset voltage difference is the voltage difference obtained by subtracting the target voltage of the voltage stabilizing tube and then subtracting the voltage drop of the diode from the voltage difference between two ends of the second electric energy storage element.

10. A energy storage power supply, characterized in that, The energy storage power supply includes the emergency power supply circuit, controller, auxiliary power supply system, and battery module according to any one of claims 1 to 9; the auxiliary power supply system is connected to the power supply terminal of the controller and is used to supply a power supply voltage to the controller; The output terminal of the emergency power supply circuit is connected to the power supply terminal of the controller, and the input terminal of the emergency power supply circuit is connected to the battery module. The emergency power supply circuit is used to supply power to the controller for a limited time according to the battery voltage provided by the battery module when the power supply voltage is less than or equal to a preset voltage.

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