Switching module control circuit and energy storage power supply

Abstract

The application relates to a switch module control circuit and an energy storage power supply. The switch module control circuit comprises a power supply circuit, a locking module, a detection module and a driving module; the power supply circuit is arranged between a power supply end and a load end, and a switch module and an overcurrent protection element are arranged on the power supply circuit; the overcurrent protection element is used for being disconnected when the current output by the power supply circuit is greater than a preset current threshold; the locking module is used for outputting a locking signal when the driving signal of the switch module is a high level, wherein the high level is a signal corresponding to the driving of the switch module; the detection module is used for bypassing the locking signal when the power supply circuit is turned on; the driving module is used for controlling the switch module to be disconnected when the locking signal is received, and controlling the switch module to be turned on based on the driving signal when the locking signal is not received. The switch module control circuit can improve the reliability of the switch module on the power supply circuit of the energy storage power supply.

Description

Technical Field

[0001] This application relates to the field of power supply control technology, and in particular to a switch module control circuit and an energy storage power supply. Background Technology

[0002] Energy storage power supplies typically have a switching module on the power supply circuit used to supply power to the load. If the switching module is turned on, the power supply circuit is turned on, and the energy storage power supply can supply power to the load. If the switching module is turned off, the power supply circuit is turned off, and the energy storage power supply stops supplying power to the load.

[0003] If the current output by the power supply circuit of the energy storage power source is too large, it will affect the reliable operation of the load. Therefore, it is necessary to disconnect the switching module installed on the power supply circuit. In traditional technology, a controller often outputs a disconnect signal to the switching module, so that the switching module disconnects according to the disconnect signal.

[0004] However, in traditional technologies, the switching modules installed on the power supply circuit of the energy storage power supply have the problem of cutting off large currents, which easily reduces the reliability of the switching modules on the power supply circuit of the energy storage power supply. Summary of the Invention

[0005] Based on this, this application provides a switching module control circuit and an energy storage power supply, which can improve the reliability of the switching module on the power supply circuit of the energy storage power supply.

[0006] In a first aspect, this application provides a switch module control circuit, which includes: a power supply circuit, a locking module, a detection module, and a drive module; the power supply circuit is disposed between the power supply end and the load end, and the power supply circuit is provided with a switch module and an overcurrent protection element; the overcurrent protection element is used to disconnect when the current output by the power supply circuit is greater than a preset current threshold.

[0007] The locking module is used to output a locking signal when the drive signal of the switching module is high, where the high level is the signal corresponding to driving the switching module to turn on;

[0008] The detection module is used to lock the signal bypass when the power supply circuit is turned on;

[0009] The drive module is used to control the switch module to disconnect when a lock signal is received, and to control the switch module to turn on based on the drive signal when no lock signal is received.

[0010] In some embodiments, the detection module includes a signal detection unit and a bypass unit;

[0011] The signal detection unit is used to output a first voltage signal when the power supply circuit is turned on and to output a second voltage signal when the power supply circuit is turned off.

[0012] The bypass unit is used to bypass the lock signal when the first voltage signal is received, and to output the lock signal when the second voltage signal is received.

[0013] In some embodiments, the signal detection unit includes an optocoupler, a first diode, and a first capacitor;

[0014] The anode of the optocoupler is connected to the live wire of the power supply circuit, the cathode of the optocoupler is connected to the neutral wire of the power supply circuit, the collector of the optocoupler is connected to the target voltage, the emitter of the optocoupler is connected to the bypass unit, and the emitter of the optocoupler is also connected to the first capacitor.

[0015] The anode of the first diode is connected to the cathode of the optocoupler, and the cathode of the first diode is connected to the anode of the optocoupler.

[0016] In some embodiments, the bypass unit includes a first switching assembly and a second capacitor;

[0017] The control terminal of the first switch assembly is connected to the output terminal of the signal detection unit, the first conducting terminal of the first switch assembly is connected to the output terminal of the locking module, the first conducting terminal of the first switch assembly is also connected to the second capacitor, and the second conducting terminal of the first switch assembly is grounded.

[0018] A first switching assembly is configured to turn on when a first voltage signal is received and turn off when a second voltage signal is received.

[0019] In some embodiments, the locking module includes a second switching assembly, a second diode, and a third capacitor;

[0020] The control terminal of the second switching assembly is connected to the anode of the second diode, and the control terminal of the second switching assembly is also connected to the first terminal of the third capacitor, and the second terminal of the third capacitor is grounded.

[0021] The first conducting terminal of the second switching component is connected to the drive signal of the switching module. The first conducting terminal of the second switching component is also connected to the cathode of the second diode. The first conducting terminal of the second switching component is also connected to the detection module.

[0022] The second conducting terminal of the second switching assembly is grounded.

[0023] In some embodiments, the driving module includes a latch unit and a state driving unit;

[0024] The latch unit is used to output a drive signal when no lock signal is received, and to bypass the drive signal when a lock signal is received;

[0025] The state drive unit is used to control the switch module to turn off when no drive signal is received, and to control the switch module to turn on when a drive signal is received.

[0026] In some embodiments, the latching unit includes a threshold setting subunit and a latching subunit; the first end of the threshold setting subunit is connected to the output end of the detection module, and the second end of the threshold setting subunit is connected to the latching subunit.

[0027] A threshold setting subunit is used to turn on when a lock signal is received;

[0028] The latch subunit is used to output a drive signal when no lock signal is received, and to bypass the drive signal when a lock signal is received.

[0029] In some embodiments, the latching subunit includes a third switching component and a fourth switching component;

[0030] The control terminal of the third switch assembly is connected to the second terminal of the threshold setting subunit, the first conducting terminal of the third switch assembly is connected to the control terminal of the state driving unit, the first conducting terminal of the third switch assembly is also connected to the control terminal of the fourth switch assembly, and the second conducting terminal of the third switch assembly is grounded.

[0031] The first conducting terminal of the fourth switching component is connected to the drive signal of the switching module, and the second conducting terminal of the fourth switching component is connected to the second terminal of the threshold setting subunit.

[0032] In some embodiments, the state driving unit includes a transistor;

[0033] The base of the transistor is connected to the output of the latch unit, the collector of the transistor is connected to the control terminal of the switching module, and the emitter of the transistor is grounded.

[0034] Secondly, this application provides an energy storage power supply, which includes a switching module control circuit and a power supply circuit as described in any of the first aspects; the power supply circuit is used to provide a power supply voltage; and the switching module control circuit is used to deliver the power supply voltage to the load.

[0035] In the technical solution provided in this application embodiment, the overcurrent protection element is used to disconnect when the current output by the power supply circuit is greater than a preset current threshold, so as to disconnect the power supply circuit. The detection module is used to output a locking signal when the power supply circuit is disconnected. When the drive module receives the locking signal, it controls the switch module to disconnect. In this way, the switch module can cut off when the power supply circuit is disconnected, that is, the zero current cut-off of the switch module is achieved. Thus, before the switch module is disconnected, the current in the power supply circuit is reduced to zero, and then the switch module is disconnected, achieving zero current turn-off of the switch module. This avoids the situation where the switch module cuts off a large current and improves the reliability of the switch module on the power supply circuit. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of the circuit structure of the switch module control circuit provided in some embodiments;

[0038] Figure 2 A schematic diagram of the circuit structure of the switch module control circuit provided in the second embodiment;

[0039] Figure 3 A schematic diagram of the circuit structure of the switch module control circuit provided in the third embodiment;

[0040] Figure 4 A schematic diagram of the circuit structure of the switch module control circuit provided in the fourth embodiment;

[0041] Figure 5 A schematic diagram of the circuit structure of the switch module control circuit provided in the fifth embodiment;

[0042] Figure 6 A schematic diagram of the circuit structure of the switch module control circuit provided in the sixth embodiment;

[0043] Figure 7 A schematic diagram of the circuit structure of the switch module control circuit provided in the seventh embodiment;

[0044] Figure 8 A schematic diagram of the structure of an energy storage power supply provided for some embodiments. Detailed Implementation

[0045] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0047] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined. In the description of the embodiments of this application, "each" means each of the multiple options, unless otherwise explicitly defined.

[0048] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0049] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In the power supply circuit of an energy storage power source, a switching module is required to control the power-on and power-off of the load connected to the energy storage power source. The load is powered on by controlling the switching module to turn on, and powered off by controlling the switching module to turn off. Exemplarily, the switching module may include a relay, circuit breaker, contactor, switching device, push-button switch, or semiconductor switch, etc. In some embodiments, because the drive coil of a relay is completely isolated from the main circuit contacts, relays are commonly used as switching modules in the power supply circuit of energy storage power sources.

[0052] Taking a relay as an example, when the relay coil is energized, the coil generates a magnetic field that magnetizes the iron core, attracting the armature to move and forcing the contacts to stick together, thus making the relay conduct. When the relay coil is de-energized, the relay contacts open, thus making the relay disconnect. However, relays cannot interrupt large currents; otherwise, arcing or sparking at the relay contacts can easily occur, leading to increased contact resistance or contact sticking, thereby affecting the reliability of the relay. Furthermore, other types of switches besides relays also experience reduced reliability when interrupting large currents.

[0053] Based on this, the switch module control circuit provided in this application can reduce the current in the power supply circuit to zero before the switch module is disconnected if the current output by the power supply circuit is too large, thereby achieving zero current shutdown of the switch module, avoiding the situation where the switch module cuts off a large current, and improving the reliability of the switch module on the power supply circuit.

[0054] Figure 1 A circuit structure diagram of the switch module control circuit provided in some embodiments, such as... Figure 1 As shown, the control circuit of this switch module includes: a power supply circuit (i.e., Figure 1 The system includes two lines connected to the power supply end and the load end, a locking module, a detection module, and a drive module. The power supply circuit is located between the power supply end and the load end, and is equipped with a switch module and an overcurrent protection element FA1. The overcurrent protection element FA1 is used to disconnect when the current output by the power supply circuit exceeds a preset current threshold.

[0055] The locking module is used to output a locking signal when the drive signal of the switching module is high, where the high level is the signal corresponding to driving the switching module to turn on.

[0056] The detection module is used to lock the signal bypass when the power supply circuit is on.

[0057] The drive module is used to control the switch module to disconnect when a lock signal is received, and to control the switch module to turn on based on the drive signal when no lock signal is received.

[0058] The switching module control circuit can be included in any device capable of supplying power to a load. For example, the switching module control circuit can be included in an energy storage power supply.

[0059] A power supply circuit may include a live wire and a neutral wire. The live wire of the power supply circuit is located at both the power supply end and the load end, and the neutral wire of the power supply circuit is located at both the power supply end and the load end.

[0060] The power supply terminal is used to connect to a power supply device, which may be included in an energy storage power source, or it may be a device other than an energy storage power source or a power grid system. The power supply device supplies power to the power supply terminal. The power supply circuit is used to transfer electrical energy to the load terminal. The load terminal is used to connect one or more loads, and the load terminal supplies power to the connected loads. In this way, the power supply device can supply power to the load through the switching module control circuit.

[0061] One or more switching modules can be installed on the power supply circuit. For example, two switching modules can be installed on the power supply circuit, one switching module is installed on the live wire of the power supply circuit, and the other switching module is installed on the neutral wire of the power supply circuit.

[0062] The overcurrent protection element FA1 on the power supply circuit may include a fuse. The fuse can trip when the current output by the power supply circuit exceeds a preset current threshold. In some embodiments, the fuse may include a resettable fuse, which, when tripped, will resume conduction if the current output by the power supply circuit is less than the preset current threshold. In other embodiments, the fuse may include a non-resettable fuse, which cannot resume conduction after tripping.

[0063] The overcurrent protection element FA1 can be installed on the live wire or the neutral wire of the power supply circuit, and this application embodiment does not limit this.

[0064] The detection module's detection terminal can be connected to the power supply circuit, its input terminal can be connected to the output terminal of the locking module, its output terminal can be connected to the input terminal of the drive module, and its output terminal can be connected to the control terminal of the switch module. When multiple switch modules are present on the power supply circuit, the control terminals of all switch modules are connected to the output terminals of the drive module.

[0065] The drive signal of the switch module can be connected to the control terminal of the drive module. The drive module provides corresponding control signals (e.g., signals to control the switch module to turn on or off) to the control terminal based on the drive signal. For example, when the drive signal is high and not bypassed, the drive module inputs a turn-on signal to the switch module to turn it on. Conversely, when the drive signal is high and bypassed, or when the drive signal is low and the drive module cannot obtain a high-level drive signal, it inputs a turn-off signal to the switch module to turn it off.

[0066] In this embodiment, the high-level signal corresponds to the signal that drives the switch module to conduct. It can be understood that a high-level drive signal is a necessary condition for triggering the switch module to conduct; only when the drive signal is high-level can the switch module be turned on. For example, the drive module can only control the switch module to conduct based on a high-level drive signal.

[0067] The drive signal of the switching module can be connected to the input terminal of the locking module, which outputs a locking signal based on a high-level drive signal. The locking signal can be a high-voltage signal. The voltage corresponding to the locking signal can be less than or equal to the voltage corresponding to the high-level drive signal. The locking module is also used to stop outputting the locking signal based on a low-level drive signal. For example, it stops outputting a low-level signal. In other embodiments, the locking signal can be a low-voltage signal; this is not a limitation.

[0068] In some embodiments, the high-level drive signal may be provided by a power supply device connected to the power supply terminal during operation. In other embodiments, the high-level drive signal may be provided by the controller of the energy storage power supply (…). Figure 1 (Not shown in the image)

[0069] Unless otherwise specified, the driving signals in the embodiments of this application refer to high-level driving signals.

[0070] The detection module can bypass the lock signal when the power supply circuit is on. The detection module can also output a lock signal when the power supply circuit is off, so that the drive module can obtain the lock signal. Bypassing the lock signal can include grounding the lock signal, shielding the lock signal, or not transmitting the lock signal to the drive module.

[0071] The drive module is used to control the switch module to open based on the drive signal and the lock signal when a lock signal is received. For example, the drive module can bypass the drive signal when a lock signal is received and output an open signal to the switch module based on the bypassed drive signal, so that the switch module opens based on the open signal. Alternatively, the drive module can output an on signal to the switch module based on the drive signal when no lock signal is received, so that the switch module turns on based on the on signal.

[0072] The following explains the working principle of the switch module control circuit: When the current output by the power supply circuit is less than or equal to a preset current threshold, the switch module can disconnect at that current. For example, the controller can set the drive signal to a low level, which corresponds to the signal that drives the switch to disconnect. The drive module controls the switch module to disconnect based on the low-level drive signal. However, in the event of a load short circuit or abnormal power supply, the current output by the power supply circuit may exceed the preset current threshold. Disconnecting the switch module at this current will affect its performance. Therefore, when the current output by the power supply circuit exceeds the preset current threshold, the overcurrent protection element FA1 disconnects, thus disconnecting the power supply circuit. The detection module outputs a lock signal when the power supply circuit is disconnected. Upon receiving the lock signal, the drive module controls the switch module to disconnect. In this way, the switch module can disconnect even when the power supply circuit is disconnected, achieving zero-current disconnection of the switch module.

[0073] In the technical solution provided in this application embodiment, the overcurrent protection element FA1 is used to disconnect when the current output by the power supply circuit is greater than a preset current threshold, so as to disconnect the power supply circuit. The detection module is used to output a locking signal when the power supply circuit is disconnected. When the drive module receives the locking signal, it controls the switch module to disconnect. In this way, the switch module can cut off when the power supply circuit is disconnected, that is, the zero current cut-off of the switch module is achieved. Thus, before the switch module is disconnected, the current in the power supply circuit is reduced to zero, and then the switch module is disconnected, achieving zero current turn-off of the switch module. This avoids the situation where the switch module cuts off a large current and improves the reliability of the switch module on the power supply circuit.

[0074] In addition, in the technical solution provided in this application embodiment, since the power supply circuit can disconnect in time when the current output by the power supply circuit is greater than the preset current threshold, the impact of large current on the load is avoided and the probability of damage to the load is reduced.

[0075] Figure 2 A schematic diagram of the circuit structure of the switch module control circuit provided in the second embodiment is shown below. Figure 2 As shown, Figure 2 Compared to Figure 1 The difference is that the detection module includes a signal detection unit and a bypass unit.

[0076] The signal detection unit is used to output a first voltage signal when the power supply circuit is turned on and a second voltage signal when the power supply circuit is turned off.

[0077] The bypass unit is used to bypass the lock signal when the first voltage signal is received, and to output the lock signal when the second voltage signal is received.

[0078] The detection terminal of the signal detection unit can be connected to the power supply circuit, the output terminal of the signal detection unit can be connected to the control terminal of the bypass unit, the input terminal of the bypass unit can be connected to the output terminal of the locking module, and the output terminal of the bypass unit can be connected to the input terminal of the drive module.

[0079] For example, the first voltage signal is a high voltage signal and the second voltage signal is a low voltage signal. Also for example, the first voltage signal is a low voltage signal and the second voltage signal is a high voltage signal.

[0080] The bypass unit can connect the output terminal of the locking module to the ground terminal when it receives the first voltage signal, thereby bypassing the locking signal. When it receives the second voltage signal, the bypass unit can disconnect the output terminal of the locking module from the ground terminal and output a locking signal so that the drive module can receive the locking signal.

[0081] In the technical solution provided in this application embodiment, through the coordinated work of the signal detection unit and the bypass unit, the bypass or output of the locking signal can be automatically completed based on the on / off working state of the power supply circuit. This effectively avoids abnormal locking signals of the power supply circuit under different working states, which could lead to the erroneous disconnection of the switching module and affect the reliability of the power supply circuit operation.

[0082] Figure 3 A schematic diagram of the circuit structure of the switch module control circuit provided in the third embodiment is shown below. Figure 3 As shown, Figure 3 Compared to Figure 2 The difference is as follows: the signal detection unit includes an optocoupler U1, a first diode D1, and a first capacitor C1; the anode of the optocoupler U1 is connected to the live wire of the power supply circuit, the cathode of the optocoupler U1 is connected to the neutral wire of the power supply circuit, the collector of the optocoupler U1 is connected to the target voltage (VCC), the emitter of the optocoupler U1 is connected to the bypass unit, and the emitter of the optocoupler U1 is also connected to the first capacitor C1; the anode of the first diode D1 is connected to the cathode of the optocoupler U1, and the cathode of the first diode D1 is connected to the anode of the optocoupler U1.

[0083] In some embodiments, the signal detection unit may further include resistors R1 and R2. The anode of the optocoupler U1 can be connected to the live wire of the power supply circuit through resistor R1. The collector of the optocoupler U1 is connected to the target voltage through resistor R2.

[0084] The target voltage can be a DC voltage (VCC), and for example, the target voltage can be provided by a controller. In some embodiments, the target voltage (VCC) is also connected to another control terminal of the switching device.

[0085] The first terminal of the first capacitor C1 is connected to the emitter of the optocoupler U1, and the second terminal of the first capacitor C1 is grounded (GND).

[0086] Figure 3 Compared to Figure 2 The difference also lies in the following: the bypass unit includes a first switching assembly and a second capacitor C2; the control terminal of the first switching assembly is connected to the output terminal of the signal detection unit, the first conducting terminal of the first switching assembly is connected to the output terminal of the locking module, the first conducting terminal of the first switching assembly is also connected to the second capacitor C2, and the second conducting terminal of the first switching assembly is grounded; the first switching assembly is used to turn on when a first voltage signal is received and to turn off when a second voltage signal is received. In some embodiments, the first conducting terminal of the first switching assembly is connected to the first terminal of the second capacitor C2, and the second terminal of the second capacitor C2 is grounded.

[0087] In some embodiments, the first switching assembly may include resistors R3 and R4, and an NPN transistor Q1. The emitter of the optocoupler U1 is connected to the base of the NPN transistor Q1 through resistor R3, and the base of the NPN transistor Q1 is grounded through resistor R4. The collector of the NPN transistor Q1 is connected to the output of the locking module, and the emitter of the NPN transistor Q1 is grounded. The NPN transistor can be turned on based on a high voltage signal to ground the locking signal output by the locking module, thereby bypassing the locking signal; and turned off based on a low level signal to output the locking signal.

[0088] Resistor R4 is the base pull-down resistor for NPN transistor Q1, preventing Q1 from being mistakenly turned on. The second capacitor C2 is a filter capacitor for the lock-in signal, preventing the lock-in signal from being output when it is briefly present.

[0089] Please continue reading. Figure 3 The working principle of the switch module control circuit in the embodiments of this application is explained as follows:

[0090] When the current output by the power supply circuit is less than or equal to the preset current threshold, the overcurrent protection element FA1 is turned on, and the power supply circuit is turned on. Since the current in the power supply circuit is alternating current, the anode of the first diode D1 is connected to the cathode of the optocoupler U1, and the cathode of the first diode D1 is connected to the anode of the optocoupler U1. Thus, the primary side of the optocoupler U1 is periodically turned on. When the primary side of the optocoupler U1 is turned on, the internal light-emitting diode emits light, causing the secondary side of the optocoupler U1 to be periodically turned on, that is, the collector and emitter are periodically turned on during the optocoupler period. During the periodic conduction of the collector and emitter during the optocoupler period, the target voltage charges the first capacitor C1 when the collector and emitter of the optocoupler U1 are turned on. When the collector and emitter of the optocoupler U1 are disconnected, the first capacitor C1 discharges, so the base of the NPN transistor Q1 receives a high voltage signal, and the NPN transistor Q1 turns on, bypassing the locking signal output by the locking module.

[0091] When the current output by the power supply circuit exceeds the preset current threshold, the overcurrent protection element FA1 is disconnected, the power supply circuit is disconnected, and the primary side of the optocoupler U1 is disconnected, causing the secondary side of the optocoupler U1 to be disconnected. The collector and emitter of the optocoupler U1 are disconnected, so the base of the NPN transistor Q1 receives a low voltage signal, the NPN transistor Q1 is disconnected, and the acquired lock signal is output.

[0092] Next, the locking module in the above embodiments will be described: Figure 4 A schematic diagram of the circuit structure of the switch module control circuit provided in the fourth embodiment is shown below. Figure 4 As shown, Figure 4 Compared to Figure 1 The difference is that the locking module includes a second switch assembly, a second diode D2, and a third capacitor C3;

[0093] The control terminal of the second switch assembly is connected to the anode of the second diode D2. The control terminal of the second switch assembly is also connected to the first terminal of the third capacitor C3, and the second terminal of the third capacitor C3 is grounded. The first conducting terminal of the second switch assembly is connected to the drive signal of the switch module. The first conducting terminal of the second switch assembly is also connected to the cathode of the second diode D2. The first conducting terminal of the second switch assembly is also connected to the detection module. The second conducting terminal of the second switch assembly is grounded.

[0094] In some embodiments, the second switching assembly may include resistors R5 and R6, and a PNP transistor Q2. The base of PNP transistor Q2 is connected to the anode of the second diode D2 through resistor R6. The base of PNP transistor Q2 is also connected to the first terminal of the third capacitor C3 through resistor R6. The emitter of PNP transistor Q2 is connected to the drive signal of the switching module through resistor R5. The emitter of PNP transistor Q2 is also connected to the cathode of the second diode D2 through resistor R5. The emitter of PNP transistor Q2 serves as the output terminal of the locking module and is connected to the input terminal of the detection module. The collector of PNP transistor Q2 is also grounded.

[0095] Please continue reading. Figure 4 Based on the circuit structure diagram of the locking module, the control circuit of the switching module is explained:

[0096] Since the emitter of PNP transistor Q2 is connected to the drive signal of the switching module (taking the V_REL signal as an example) through resistor R5, when the V_REL signal is high, PNP transistor Q2 operates in reverse bias. The V_REL signal flows through resistor R5, the base of PNP transistor Q2, and resistor R6 to the third capacitor C3, PNP transistor Q2 is turned on, and the V_R0 voltage (i.e., the lockout signal) is pulled down to ground. When the V_R0 voltage is pulled down to ground, the V_R0 voltage cannot be output until the voltage at the first end of the third capacitor C3 reaches the voltage that turns off PNP transistor Q2. Then PNP transistor Q2 turns off, allowing the lockout module to output the V_R0 voltage.

[0097] For example, by setting the parameters of the third capacitor C3 and resistor R6, the conduction and disconnection of the PNP transistor Q2 can be controlled to achieve the purpose of delaying the arrival of the V_R0 voltage to the drive module.

[0098] For example, when the V_REL signal is an invalid low level, the third capacitor C3 discharges through the second diode D2 to reset the circuit, and when the next valid high level of the V_REL signal arrives, it will again achieve the delay effect.

[0099] In this embodiment of the application, combined with Figure 3 and Figure 4 Because the locking module can delay the output of the locking signal, it can prevent the locking signal from being transmitted to the driver module before the NPN transistor Q1 has had time to turn on, thus avoiding the driver module from malfunctioning in the switching module.

[0100] Next, the driver module in the above embodiments will be described: Figure 5 A schematic diagram of the circuit structure of the switch module control circuit provided in the fifth embodiment is shown below. Figure 5 As shown, Figure 5 Compared to Figure 1 The difference lies in the fact that the drive module includes a latch unit and a state drive unit. The latch unit is used to output a drive signal when no lock signal is received, and to bypass the drive signal when a lock signal is received. The state drive unit is used to control the switch module to open when no drive signal is received, and to control the switch module to open when a drive signal is received.

[0101] The input terminal of the latch unit is connected to the output terminal of the detection module, the output terminal of the latch module is connected to the control terminal of the state drive unit, and the output terminal of the state drive unit is connected to the control terminal of the switch module. For example, the first conducting terminal (i.e., the output terminal) of the state drive unit is connected to the control terminal of the switch module, and the second conducting terminal of the state drive unit is grounded.

[0102] The latch unit is used to continuously bypass the drive signal when a lock signal is received, until the drive signal transitions to a low level. In other words, the latch unit can latch the bypassed state of the drive signal, so that it can maintain the bypass of the drive signal until the drive signal transitions to a low level.

[0103] For example, the state driving unit can be disconnected when no driving signal is received, so that the switch module connected to the driving signal at the control terminal is disconnected. The state driving unit can be turned on when a driving signal is received, so that the driving signal at the control terminal of the switch module is pulled down to ground and the switch module is turned on.

[0104] In the technical solution provided in this application embodiment, by setting a latching unit and a state driving unit, the latching unit bypasses the driving signal when it receives a lock signal. In this way, even if the current output by the power supply circuit is greater than the preset current threshold and then becomes less than or equal to the preset current threshold again, and the overcurrent protection element FA1 is turned on again and the detection module bypasses the lock signal again, the latching unit can still maintain the bypass of the driving signal to continuously lock the switch module in the open state until the driving signal is low. Only then will the latching unit stop locking the switch module in the open state, thus avoiding the impact on the load caused by the continuous power supply and power cut-off.

[0105] The latch unit is explained below: Figure 6 A schematic diagram of the circuit structure of the switch module control circuit provided in the sixth embodiment is shown below. Figure 6 As shown, Figure 6 Compared to Figure 5 The difference is that the latch unit includes a threshold setting subunit and a latch subunit; the first end of the threshold setting subunit is connected to the output end of the detection module, and the second end of the threshold setting subunit is connected to the latch subunit; the threshold setting subunit is used to turn on when a lock signal is received; the latch subunit is used to output a drive signal when no lock signal is received, and to bypass the drive signal when a lock signal is received.

[0106] For example, the threshold setting subunit is configured to disconnect upon receiving a voltage signal less than the lock signal. For example, the threshold setting subunit may include a Zener diode ZD1. The Zener diode ZD1 is capable of being broken down by the lock signal, and disconnects upon receiving a voltage signal less than the lock signal. For example, the first terminal of the threshold setting subunit may be the cathode of the Zener diode ZD1, and the second terminal of the threshold setting subunit may be the anode of the Zener diode ZD1.

[0107] The control terminal of the latch subunit can be connected to the second terminal of the threshold setting subunit. The input terminal of the latch subunit is connected to the drive signal, and the output terminal of the latch subunit is connected to the control terminal of the state drive unit.

[0108] Figure 6 Compared to Figure 5 The difference also lies in the following: the latching subunit includes a third switch component and a fourth switch component; the control terminal of the third switch component is connected to the second terminal of the threshold setting subunit, the first conducting terminal of the third switch component is connected to the control terminal of the state driving unit, the first conducting terminal of the third switch component is also connected to the control terminal of the fourth switch component, and the second conducting terminal of the third switch component is grounded; the first conducting terminal of the fourth switch component is connected to the drive signal of the switch module, and the second conducting terminal of the fourth switch component is connected to the second terminal of the threshold setting subunit.

[0109] The third switching assembly includes resistor R7 and NPN transistor Q3. The fourth switching assembly includes resistors R8 and R9, and PNP transistor Q4.

[0110] In this configuration, the base of NPN transistor Q3 is connected to the anode of Zener diode ZD1 via resistor R7. The base of NPN transistor Q3 is also connected to the collector of PNP transistor Q4 via resistor R7. The collector of PNP transistor Q4 is connected to the anode of Zener diode ZD1. The collector of NPN transistor Q3 is connected to the drive signal via resistor R8. The collector of NPN transistor Q3 is also connected to the emitter of PNP transistor Q4 via resistor R8. The collector of NPN transistor Q3 is connected to the base of PNP transistor Q4 via resistor R9. The emitter of NPN transistor Q3 is grounded.

[0111] Figure 6 Compared to Figure 5 The difference also lies in the fact that the state driving unit includes a transistor ( Figure 6 The transistor shown is an NPN transistor Q5; the base of the transistor (NPN transistor Q5) is connected to the output terminal of the latch unit, the collector of the transistor (NPN transistor Q5) is connected to the control terminal of the switching module, and the emitter of the transistor (NPN transistor Q5) is grounded.

[0112] For example, resistor R7 limits the base current flowing through NPN transistor Q3 after the lockout signal breaks down Zener diode ZD1. Resistor R8 limits the base current of NPN transistor Q5 to the V_REL signal. Resistor R9 is a current-limiting resistor.

[0113] Please continue reading. Figure 6 Based on the circuit structure diagram of the drive module, the control circuit of the switch module is explained:

[0114] When the Zener diode ZD1 does not receive a lock signal, the Zener diode ZD1 will not be broken down, the NPN transistor Q3 is in the off state, the high-level drive signal (V_REL signal) is transmitted to the base of the NPN transistor Q5 through the resistor R8, the NPN transistor Q5 is turned on, the high-level drive signal (V_REL signal) connected to the control terminal of the switching module is grounded, and the switching module is turned on.

[0115] When the Zener diode ZD1 receives the lockout signal, it breaks down, and the NPN transistor Q3 turns on. This causes the high-level drive signal (V_REL signal) to pass through the PNP transistor Q4, which in turn sinks voltage to the base of the NPN transistor Q3 through resistor R7, keeping Q3 continuously conducting. In other words, after the lockout signal triggers the NPN transistor Q3 to turn on, as long as the V_REL signal is high, the switch module remains locked in its off state until the V_REL signal resets to low, at which point the thyristor lock formed by the NPN transistor Q3 and the PNP transistor Q4 will reset.

[0116] Figure 7 A schematic diagram of the circuit structure of the switch module control circuit provided in the seventh embodiment is shown below. Figure 7 As shown, Figure 7 The switching module control circuit is as described above. Figure 3 , Figure 4 as well as Figure 6 Combinations of examples. Figure 7 The system includes two switching modules, for example, both of which are relays, namely relay RLY1 and relay RLY2. One end of the coil of relay RLY1 and relay RLY2 is connected to the V_REL+ signal (the potential values ​​corresponding to the V_REL+ signal and the V_REL signal can be different or the same), and the other end is connected to VCC. When transistor Q5 is off, the V_REL+ signal is floating, and the coils of relays RLY1 and RLY2 do not form a power supply circuit; at this time, relays RLY1 and RLY2 are in the off state. When transistor Q5 is on, and the V_REL+ signal is pulled down to ground, the coils of relays RLY1 and RLY2 form a power supply circuit, and relays RLY1 and RLY2 are turned on.

[0117] The following combination Figure 7 In this embodiment, taking a relay as an example, the working principle of the switch module control circuit is explained:

[0118] When powered by the power supply and the drive signal V_REL is high, the high-level drive signal V_REL drives NPN transistor Q5 to conduct, causing the V_REL+ signal connected to one end of the coils of relays RLY1 and RLY2 to be pulled down to ground, thus turning on relays RLY1 and RLY2. In the locking module, the V_REL signal flows through resistor R4, the base of PNP transistor Q2, and resistor R5 to the third capacitor C3, turning on PNP transistor Q2. The V_R0 voltage (i.e., the locking signal) is pulled down to ground. When the V_R0 voltage is pulled down to ground, it cannot be output until the voltage at the first end of the third capacitor C3 reaches the voltage that turns off PNP transistor Q2. At this point, PNP transistor Q2 turns off, allowing the locking module to output the V_R0 voltage. In other words, the locking module can delay the output of the V_R0 voltage. This avoids the situation where, when the locking module outputs the V_R0 voltage, the NPN transistor Q1 is not yet turned on, causing the V_R0 voltage to break down the Zener diode ZD1, turning on the NPN transistor Q3, pulling the base level of the NPN transistor Q5 low, turning off the NPN transistor Q5, and leaving the V_REL+ signal floating, thus preventing the relays RLY1 and RLY2 from conducting. That is, in this embodiment, the delay module outputs the V_R0 voltage to the detection module after the NPN transistor Q1 is turned on, so that the NPN transistor Q1 can reliably ground the V_R0 voltage, effectively bypassing it.

[0119] When power is supplied from the power supply end and the power supply circuit is disconnected, the drive signal remains at a high level. However, because the power supply circuit is disconnected, the base voltage of NPN transistor Q1 is 0, and NPN transistor Q1 is off. The V_R0 voltage breaks down the Zener diode ZD1, causing NPN transistor Q3 to conduct. The base level of NPN transistor Q5 is pulled low, and NPN transistor Q5 is off, causing relays RLY1 and RLY2 to disconnect. This achieves zero-current turn-off of relays RLY1 and RLY2.

[0120] Figure 8 Schematic diagrams of the energy storage power supply provided for some embodiments, such as Figure 8 As shown, the energy storage power supply includes the switching module control circuit and the power supply circuit in any of the above embodiments; the power supply circuit is used to provide the power supply voltage; the switching module control circuit is used to deliver the power supply voltage to the load.

[0121] For example, the power supply circuit can be connected to the power supply terminal of the switch module control circuit. For example, the power supply circuit can include an inverter circuit, which can be connected to the battery module. The inverter circuit is used to convert the direct current output from the battery module into alternating current, and input the alternating current to the power supply terminal.

[0122] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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, they should be considered to be within the scope of this application.

[0123] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A switch module control circuit, characterized by, The switch module control circuit includes: a power supply circuit, a locking module, a detection module, and a drive module; the power supply circuit is located between the power supply end and the load end, and the power supply circuit is equipped with a switch module and an overcurrent protection element; the overcurrent protection element is used to disconnect when the current output by the power supply circuit is greater than a preset current threshold. The detection terminal of the detection module is connected to the power supply circuit, the input terminal of the detection module is connected to the output terminal of the locking module, the output terminal of the detection module is connected to the input terminal of the drive module, and the output terminal of the drive module is connected to the control terminal of the switch module. The locking module is used to output a locking signal when the drive signal of the switch module is high, wherein the high level is the signal corresponding to driving the switch module to turn on; The detection module is used to bypass the locking signal when the power supply circuit is on, and to transmit the locking signal to the drive module when the power supply circuit is off. The drive module is configured to control the switch module to disconnect when the lock signal is received, and to control the switch module to turn on based on the drive signal when the lock signal is not received.

2. The switch module control circuit according to claim 1, characterized in that, The detection module includes a signal detection unit and a bypass unit; The signal detection unit is used to output a first voltage signal when the power supply circuit is turned on, and to output a second voltage signal when the power supply circuit is turned off. The bypass unit is configured to bypass the lock signal when the first voltage signal is received, and to output the lock signal when the second voltage signal is received.

3. The switch module control circuit of claim 2, wherein, The signal detection unit includes an optocoupler, a first diode, and a first capacitor; The anode of the optocoupler is connected to the live wire of the power supply circuit, the cathode of the optocoupler is connected to the neutral wire of the power supply circuit, the collector of the optocoupler is connected to the target voltage, the emitter of the optocoupler is connected to the bypass unit, and the emitter of the optocoupler is also connected to the first capacitor. The anode of the first diode is connected to the cathode of the optocoupler, and the cathode of the first diode is connected to the anode of the optocoupler.

4. The switch module control circuit of claim 2, wherein, The bypass unit includes a first switching assembly and a second capacitor; The control terminal of the first switch assembly is connected to the output terminal of the signal detection unit, the first conducting terminal of the first switch assembly is connected to the output terminal of the locking module, the first conducting terminal of the first switch assembly is also connected to the second capacitor, and the second conducting terminal of the first switch assembly is grounded. The first switching component is configured to turn on when receiving the first voltage signal and turn off when receiving the second voltage signal.

5. The switch module control circuit of any one of claims 1 to 4, wherein, The locking module includes a second switching assembly, a second diode, and a third capacitor; The control terminal of the second switching assembly is connected to the anode of the second diode, and the control terminal of the second switching assembly is also connected to the first terminal of the third capacitor, and the second terminal of the third capacitor is grounded; The first conducting terminal of the second switching component is connected to the driving signal of the switching module, the first conducting terminal of the second switching component is also connected to the cathode of the second diode, and the first conducting terminal of the second switching component is also connected to the detection module; The second conducting terminal of the second switching assembly is grounded.

6. The switch module control circuit of any one of claims 1 to 4, wherein, The driving module includes a latch unit and a state driving unit; The latching unit is used to output the drive signal when the lock signal is not received, and to bypass the drive signal when the lock signal is received. The state driving unit is used to control the switch module to open when no driving signal is received, and to control the switch module to open when the driving signal is received.

7. The switch module control circuit of claim 6, wherein, The latching unit includes a threshold setting subunit and a latching subunit; the first end of the threshold setting subunit is connected to the output end of the detection module, and the second end of the threshold setting subunit is connected to the latching subunit. The threshold setting subunit is used to be turned on when a lock signal is received; The latch subunit is configured to output the drive signal when no lock signal is received, and to bypass the drive signal when the lock signal is received.

8. The switch module control circuit of claim 7, wherein, The latching subunit includes a third switching assembly and a fourth switching assembly; The control terminal of the third switch component is connected to the second terminal of the threshold setting subunit, the first conducting terminal of the third switch component is connected to the control terminal of the state driving unit, the first conducting terminal of the third switch component is also connected to the control terminal of the fourth switch component, and the second conducting terminal of the third switch component is grounded. The first conducting terminal of the fourth switch component is connected to the drive signal of the switch module, and the second conducting terminal of the fourth switch component is connected to the second terminal of the threshold setting subunit.

9. The switch module control circuit of claim 6, wherein, The state driving unit includes a transistor; The base of the transistor is connected to the output terminal of the latch unit, the collector of the transistor is connected to the control terminal of the switching module, and the emitter of the transistor is grounded.

10. An energy storage power source, characterized in that, The energy storage power supply includes the switching module control circuit and power supply circuit as described in any one of claims 1 to 9; The power supply circuit is used to provide the power supply voltage; The switch module control circuit is used to deliver the power supply voltage to the load.

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