Energy storage power supply startup control circuit and energy storage device

Abstract

The present application relates to a startup control circuit and energy storage device for an energy storage power supply. The startup control circuit includes: a first control module for receiving a first control signal from a first element and determining the state of the first control module based on the first control signal; a second control module for receiving a second control signal from a second element and determining the state of the second control module based on the second control signal, and controlling the state of the first control module based on the state of the second control module; a voltage conversion module for controlling the conversion efficiency of the voltage conversion module based on the state of the first control module, so that when the difference between the power of the feedback winding and the power of the secondary winding is less than a preset difference, the feedback voltage of the feedback winding is converted into a preset voltage, and the second element is powered by the feedback voltage, and the first element is powered by the secondary voltage of the secondary winding, so as to start the energy storage power supply. The use of this startup control circuit can improve the reliability of the energy storage power supply.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a startup control circuit of an energy storage power supply and an energy storage device. Background Art

[0002] Energy storage power supplies are increasingly being used in various scenarios, and their auxiliary power supply is an important component of the energy storage power supply. It provides power for components such as fans, inverter circuit relays, switch tube drivers, current transformers (CTs), display screens, control chips, and Bluetooth.

[0003] In the related art, a flyback circuit is generally used to output different supply voltages, so that the supply voltage output by the flyback circuit is used to power the above-mentioned components.

[0004] However, due to the transformer leakage inductance in the flyback circuit, the flyback circuit has a cross-regulation rate, and therefore, the reliability of the current energy storage power supply is not high. Summary of the Invention

[0005] Based on this, it is necessary to provide a more reliable starting control circuit and energy storage device for the energy storage power supply in order to solve the above technical problems.

[0006] In a first aspect, the present application provides a startup control circuit for an energy storage power supply, the energy storage power supply including a flyback circuit, a first component, and a second component. The flyback circuit includes a feedback winding and a secondary winding. The startup control circuit includes a second control module, a first control module, and a voltage conversion module connected in sequence; the second control module, the first control module, and the voltage conversion module are all connected to the feedback winding;

[0007] A first control module, configured to receive a first control signal of the first element and determine a state of the first control module according to the first control signal; the first control signal is used to control the first element to start or stop working;

[0008] a second control module, configured to receive a second control signal from the second element, determine a state of the second control module based on the second control signal, and control a state of the first control module based on the state of the second control module; the second control signal is configured to control the second element to start or stop operation, with the first element being started earlier than the second element;

[0009] The voltage conversion module is used to control the conversion efficiency of the voltage conversion module according to the state of the first control module, so as to convert the feedback voltage of the feedback winding into a preset voltage when the difference between the power of the feedback winding and the power of the secondary winding is less than a preset difference, and to power the second element through the feedback voltage and power the first element through the secondary voltage of the secondary winding to start the energy storage power supply.

[0010] In one embodiment, the voltage conversion module includes a first conversion unit and a second conversion unit, the first conversion unit and the second conversion unit are respectively connected to the feedback winding; the conversion efficiency of the second conversion unit is lower than the conversion efficiency of the first conversion unit;

[0011] The first control module is configured to be in a first state when the first control signal is at a first level for controlling the first element to stop working, and to control the first path between the feedback winding and the first conversion unit to be conductive when in the first state, so as to convert the feedback voltage into a preset voltage through the first path; and to be in a second state when the first control signal is at a second level for controlling the first element to start working, and to control the second path between the feedback winding and the second conversion unit to be conductive when in the second state, so as to convert the feedback voltage into the preset voltage through the second path.

[0012] In one embodiment, the second control module includes a first control unit and a first switch unit connected to each other; the first control unit is used to receive the second control signal, and the first switch unit is connected to the first control module;

[0013] a first control unit, configured to output an off signal to the first switch unit when the second control signal is at a third level for controlling the second element to stop working, and to output an on signal to the first switch unit when the second control signal is at a fourth level for controlling the second element to start working;

[0014] The first switch unit is configured to disconnect the control path between the first switch unit and the first control module when a disconnection signal is received, and to connect the control path when a connection signal is received, so as to control the first control module to the first state through the control path.

[0015] In one embodiment, the first control unit includes a switch subunit, an operational amplifier subunit, and a charging subunit; the operational amplifier subunit is connected to the switch subunit and the charging subunit respectively, the charging subunit is connected to the first switch unit, the switch subunit is used to receive the second control signal, and the operational amplifier subunit is also connected to the feedback winding;

[0016] a switch subunit, configured to be in an off state when the second control signal is at a third level, and to be in an on state when the second control signal is at a fourth level;

[0017] The operational amplifier subunit is used to charge the charging subunit through the feedback voltage when the switch subunit is in the on state, so as to control the first switch unit to be in the on state when the charging voltage of the charging subunit is greater than a preset charging threshold.

[0018] In one embodiment, the switch subunit includes a first transistor and a second transistor; the gate of the first transistor is used to receive the second control signal, the drain of the first transistor is connected to the base of the second transistor, and the source of the first transistor is grounded;

[0019] The emitter and the base of the second transistor are both connected to the feedback winding, the collector of the second transistor is connected to the non-inverting input terminal of the operational amplifier sub-unit, and the inverting input terminal of the operational amplifier sub-unit is grounded.

[0020] In one embodiment, the first switch unit includes a third transistor; the gate of the third transistor is connected to the first control unit, the source of the third transistor is grounded, and the drain of the third transistor is connected to the first control module.

[0021] In one embodiment, the first control module includes a relay control unit and a relay switching unit, the relay switching unit is respectively connected to the relay control unit, the input end of the voltage conversion module and the feedback winding of the flyback circuit, and the relay control unit is also connected to the feedback winding;

[0022] The relay control unit is configured to receive a first control signal, output a first switching signal to the relay switching unit when the first control signal is at a first level, and output a second switching signal to the relay switching unit when the first control signal is at a second level;

[0023] The relay switching unit is configured to control the first path to be conductive when a first switching signal is received, and to control the second path to be conductive when a second switching signal is received.

[0024] In one embodiment, the relay control unit includes a first subunit and a second subunit connected to each other; the first subunit is used to receive a first control signal, and the second subunit is connected to the relay switching unit;

[0025] The first subunit is configured to be in an off state when the first control signal is at a first level, and control the second subunit to be in an off state so that the second subunit outputs a first switching signal to the relay switching unit; and to be in an on state when the first control signal is at a second level, and control the second subunit to be in an on state so that the second subunit outputs a second switching signal to the relay switching unit.

[0026] In one embodiment, the first subunit includes a fourth transistor, and the second subunit includes a fifth transistor; the base of the fourth transistor is used to receive the first control signal, the collector of the fourth transistor is connected to the base of the fifth transistor, and the emitter of the fourth transistor is grounded; the base of the fifth transistor is also connected to the feedback winding, the emitter of the fifth transistor is connected to the feedback winding through the relay switching unit, and the collector of the fifth transistor is grounded.

[0027] In one embodiment, the relay switching unit includes a coil, a first contact, a second contact, and a third contact; the first end of the coil is connected to the feedback winding, and the second end of the coil is connected to the first control module; the first contact is connected to the feedback winding, the second contact is connected to the input end of the first conversion unit, and the third contact is connected to the input end of the second conversion unit;

[0028] The relay switching unit is configured to, upon receiving a first switching signal, control the feedback winding to stop energizing the coil and connect the first contact and the second contact to conduct the first path; and, upon receiving a second switching signal, control the feedback winding to energize the coil and connect the first contact and the third contact to switch the second path to conduction.

[0029] In one embodiment, the first control module includes a second switch unit, a third switch unit, and a fourth switch unit; the second switch unit is connected to the third switch unit and the fourth switch unit respectively, the third switch unit is connected to the feedback winding and the first conversion unit respectively, and the fourth switch unit is connected to the feedback winding and the second conversion unit respectively;

[0030] a second switch unit, configured to receive a first control signal, and be in an off state when the first control signal is at a first level, and be in an on state when the first control signal is at a second level;

[0031] a third switch unit, configured to be in an on state when the second switch unit is in an off state and control the first path to be on, and to be in an off state when the second switch unit is in an on state and control the first path to be off;

[0032] The fourth switch unit is configured to be in an off state when the second switch unit is in an off state and control the second path to be disconnected, and to be in an on state when the second switch unit is in an on state and control the second path to be connected.

[0033] In one embodiment, the second switch unit includes a sixth transistor, the third switch unit includes a seventh transistor, and the fourth switch unit includes an eighth transistor;

[0034] The gate of the sixth transistor is used to receive the first control signal, the source of the sixth transistor is grounded, and the drain of the sixth transistor is connected to the base of the seventh transistor and the base of the eighth transistor respectively;

[0035] The emitter of the seventh transistor is grounded, the collector of the seventh transistor is connected to the first conversion unit, and the base of the seventh transistor is also connected to the feedback winding;

[0036] An emitter of the eighth transistor is connected to the feedback winding, and a collector of the eighth transistor is connected to the second conversion unit.

[0037] In one embodiment, the first control module further includes a first one-way conducting unit and a second one-way conducting unit;

[0038] The positive electrode of the first unidirectional conductive unit is connected to the base of the seventh transistor, and the negative electrode of the first unidirectional conductive unit is connected to the drain of the sixth transistor;

[0039] The anode of the second unidirectional conductive unit is connected to the base of the eighth transistor, and the cathode of the second unidirectional conductive unit is connected to the drain of the sixth transistor.

[0040] In one embodiment, the first control module further includes a fifth switch unit, and the fifth switch unit includes a ninth transistor;

[0041] An emitter of the ninth transistor is connected to the feedback winding, a collector of the ninth transistor is connected to the first conversion unit, and a base of the ninth transistor is connected to the collector of the seventh transistor.

[0042] In a second aspect, the present application also provides an energy storage device, including an energy storage power supply and a startup control circuit as described above.

[0043] The above-mentioned startup control circuit and energy storage device of the energy storage power supply include a flyback circuit, a first element, and a second element. The flyback circuit includes a feedback winding and a secondary winding. The startup control circuit includes a second control module, a first control module, and a voltage conversion module connected in sequence. The second control module, the first control module, and the voltage conversion module are all connected to the feedback winding. Since the first control module is used to receive a first control signal from the first element and determine the state of the first control module based on the first control signal, the first control signal is used to control the first element to start or stop operation, and the second control module is used to receive a second control signal from the second element and determine the state of the second control module based on the second control signal, and control the state of the first control module based on the state of the second control module, the second control signal is used to control the second element to start or stop operation, and the startup time of the first element is earlier than the startup time of the second element. Therefore, as the first and second elements start, the states of the first and second control modules will change accordingly. Furthermore, since the voltage conversion module is used to control the conversion efficiency of the voltage conversion module according to the state of the first control module, so as to convert the feedback voltage of the feedback winding into a preset voltage when the difference between the power of the feedback winding and the power of the secondary winding is less than the preset difference, in this way, when the power between the feedback winding and the secondary winding is balanced, the second element can be powered by the feedback voltage, and the first element can be powered by the secondary voltage of the secondary winding, so as to stably start the energy storage power supply, avoid the situation where the energy storage power supply fails to operate due to the start-up of the first element, and improve the reliability of the energy storage power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 Schematic diagram of a flyback circuit in related art;

[0046] Figure 2 is a schematic diagram of a startup control circuit in one embodiment;

[0047] Figure 3 is a schematic diagram of a voltage conversion module in one embodiment;

[0048] Figure 4 is a schematic diagram of a second control module in one embodiment;

[0049] Figure 5is a schematic diagram of yet another startup control circuit in one embodiment;

[0050] Figure 6 is a schematic diagram of a second component startup process in one embodiment;

[0051] Figure 7 is a schematic diagram of a first control module in one embodiment;

[0052] Figure 8 is a schematic diagram of yet another first control module in one embodiment;

[0053] Figure 9 is a schematic diagram of yet another startup control circuit in one embodiment;

[0054] Figure 10 is a schematic diagram of yet another startup control circuit in one embodiment;

[0055] Figure 11 Schematic diagram of an energy storage device in one embodiment. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0057] Figure 1 Schematic diagram of a flyback circuit in related art, such as Figure 1 As shown, the flyback circuit 100 includes a battery voltage BAT+, a feedback winding 101 (ie Figure 1 12V_P in), diode D1, resistor R1, capacitor C1, transformer T1, resistor R2, diode D2, secondary winding 102 (i.e. Figure 1 12V_S in the battery), capacitor C2, transistor Q1, resistors R3 and R4, control integrated circuit (Control IC) 103, capacitor C3, resistors R5 and R6, and transistor Q2. The input (IN) pin of control integrated circuit 103 is connected to the battery voltage BAT+, the feedback (FB) pin of control integrated circuit 103 is connected to the collector of transistor Q2, and the gate drive (GATE) pin of control integrated circuit 103 is connected to the gate of transistor Q1 through resistor R3. GND and GND1 represent different ground terminals.

[0058] The feedback winding 12V_P powers the fan, low-voltage side switch driver, display, and control chip in the energy storage power supply. The secondary winding 12V_S powers the inverter circuit's relays, high-voltage side switch driver, and CT. Specifically, the display and control chip are powered by the feedback winding 12V_P, which is converted to 5 volts (V) via a step-down module. For example, the fan draws approximately 3 watts (W); the low-voltage side switch driver draws approximately 1 W; the display and control chip draw approximately 1 W; the inverter circuit's relay draws approximately 3 W; the CT draws approximately 1 W; and the high-side switch driver draws approximately 1 W.

[0059] When the energy storage power supply is working, that is, when the energy storage power supply starts to charge or discharge, the energy storage power supply will go through the following three working processes in sequence: Working process A, the low-voltage side switch tube drive, high-voltage side switch tube drive, CT, display screen and control chip start working; Working process B, the relay of the inverter circuit is energized; Working process C: the fan starts working after the charging or discharging power of the energy storage power supply is stable.

[0060] In working process A, the total power of the feedback winding 12V_P is 2W, and the total power of the secondary winding 12V_S is 2W. At this time, the power of the feedback winding 12V_P and the power of the secondary winding 12V_S are relatively balanced, that is, the energy coupling between the feedback winding and the secondary winding is balanced, and the secondary voltage of the secondary winding 12V_S does not change, which does not affect the normal operation of the energy storage power supply.

[0061] In working process B, the total power of the feedback winding 12V_P is 2W, and the total power of the secondary winding 12V_S is 5W. At this time, the power of the secondary winding 12V_S is much greater than the power of the feedback winding 12V_P. Therefore, the secondary voltage of the secondary winding 12V_S will drop, and may even drop below the minimum pull-in voltage of the relay, causing the relay of the inverter circuit to fail to pull in, resulting in the energy storage power supply failing to charge or discharge.

[0062] As can be seen, due to the cross-regulation of the flyback circuit, if the energy coupling between the feedback winding and the secondary winding is unbalanced, the secondary voltage will drop, the energy storage power supply will fail, and the reliability of the energy storage power supply will be affected. Based on this, the present application provides a startup control circuit for an energy storage power supply, which will be described in detail below.

[0063] Figure 2 FIG. 1 is a schematic diagram of a startup control circuit in one embodiment, Figure 2As shown, in an exemplary embodiment, the energy storage power supply includes a flyback circuit 100, a first component, and a second component. The flyback circuit 100 includes a feedback winding 101 and a secondary winding 102. The secondary voltage corresponding to the secondary winding 102 supplies power to the first component. Therefore, the activation of the first component causes the secondary voltage to drop. The feedback voltage corresponding to the feedback winding 101 supplies power to the second component. Therefore, the activation of the second component causes the feedback voltage to drop. Furthermore, the startup time of the first component is earlier than the startup time of the second component. Exemplarily, the first component includes, but is not limited to, the relay in the above-mentioned inverter circuit. The second component includes, but is not limited to, the above-mentioned fan.

[0064] The startup control circuit 200 includes a second control module 202 , a first control module 201 and a voltage conversion module 203 connected in sequence. The second control module 202 , the first control module 201 and the voltage conversion module 203 are all connected to the feedback winding 101 .

[0065] Furthermore, the first control module 201 is configured to receive a first control signal of the first component and determine the state of the first control module 201 according to the first control signal, wherein the first control signal is used to control the first component to start or stop working.

[0066] Optionally, the first control signal includes a first level or a second level. When the first control signal is at the first level, the first control signal is used to control the first element to stop working. When the first control signal is at the second level, the first control signal is used to control the first element to start working. The first level and the second level can be set as required. For example, the first level can be a low level and the second level can be a high level.

[0067] Optionally, the first control module 201 may be in a first state when receiving a first level and in a second state when receiving a second level. The first state and the second state are two different states, for example, the first state is an off state and the second state is an on state.

[0068] Further optionally, the first control module 201 may include at least one switching element. After receiving the first control signal, the first control module 201 controls the state of the first control module 201 through the switching element in the first control module 201. The switching element includes, but is not limited to, a manual switch, a relay, an insulated gate bipolar transistor (IGBT), and a metal-oxide-semiconductor field-effect transistor (MOSFET). For example, the switching element in the first control module 201 may be a single-pole double-throw switch.

[0069] The second control module 202 is configured to receive a second control signal from the second component, determine a state of the second control module 202 based on the second control signal, and control the state of the first control module 201 based on the state of the second control module 202. The second control signal is used to control the second component to start or stop working.

[0070] Optionally, the second control signal includes a third level or a fourth level. When the second control signal is at the third level, the second control signal is used to control the second element to stop working. When the second control signal is at the fourth level, the second control signal is used to control the second element to start working. The third level and the fourth level can be set as required. For example, the third level can be a low level, and the fourth level can be a high level.

[0071] Optionally, the second control module 202 may be in a third state upon receiving a third level and in a fourth state upon receiving a fourth level. The third state and the fourth state are two different states. For example, the third state is an off state and the fourth state is an on state.

[0072] Further optionally, when the second control module 202 is in the third state, the state of the second control module 202 can be determined only according to the first control signal; when the second control module 202 is in the fourth state, the second control module 202 controls the state of the first control module 201 to be the first state.

[0073] In some embodiments, the second control module 202 may also include at least one switching element. After receiving the second control signal, the second control module 202 controls the state of the second control module 202 through the switching element in the second control module 202, and controls the state of the first control module 201 according to the state of the second control module 202.

[0074] In some embodiments, the first control module and / or the second control module may further include a control element, wherein the control element includes but is not limited to a central processing unit (CPU), a digital signal processor (DSP), a field programmable gate array (FPGA), or other programmable logic devices.

[0075] Furthermore, the voltage conversion module 203 is used to control the conversion efficiency of the voltage conversion module 203 according to the state of the first control module 201, so as to convert the feedback voltage of the feedback winding 101 into a preset voltage when the difference between the power of the feedback winding 101 and the power of the secondary winding 102 is less than the preset difference, and to power the second element through the feedback voltage and to power the first element through the secondary voltage of the secondary winding 102 to start the energy storage power supply.

[0076] The preset difference can be set according to actual needs. If the difference between the power of the feedback winding 101 and the power of the secondary winding 102 is less than the preset difference, it means that the power of the feedback winding 101 and the power of the secondary winding 102 are not much different, that is, the energy coupling between the feedback winding 101 and the secondary winding 102 is balanced. In this case, the energy storage power supply operates relatively stably.

[0077] For example, the voltage conversion module may control the conversion efficiency corresponding to the first control module being in the first state to be greater than the conversion efficiency corresponding to the first control module being in the second state.

[0078] In the above-mentioned startup control circuit 200, the energy storage power supply includes a flyback circuit 100, a first component and a second component. The flyback circuit 100 includes a feedback winding 101 and a secondary winding 102. The startup control circuit 200 includes a second control module 202, a first control module 201 and a voltage conversion module 203 connected in sequence. The second control module 202, the first control module 201 and the voltage conversion module 203 are all connected to the feedback winding 101. Since the first control module 201 is used to receive the first control signal of the first element and determine the state of the first control module 201 according to the first control signal, the first control signal is used to control the first element to start or stop working, and the second control module 202 is used to receive the second control signal of the second element and determine the state of the second control module 202 according to the second control signal, and control the state of the first control module 201 according to the state of the second control module 202, the second control signal is used to control the second element to start or stop working, the start time of the first element is earlier than the start time of the second element. Therefore, as the first element and the second element are started, the states of the first control module 201 and the second control module 202 will change accordingly. Furthermore, since the voltage conversion module 203 is used to control the conversion efficiency of the voltage conversion module 203 according to the state of the first control module 201, the feedback voltage of the feedback winding 101 is converted into a preset voltage when the difference between the power of the feedback winding 101 and the power of the secondary winding 102 is less than the preset difference. In this way, when the power between the feedback winding 101 and the secondary winding 102 is balanced, the second element can be powered by the feedback voltage, and the first element can be powered by the secondary voltage of the secondary winding 102, so as to stably start the energy storage power supply, avoid the situation where the energy storage power supply fails to operate due to the start-up of the first element, and improve the reliability of the energy storage power supply.

[0079] Figure 3 FIG. 1 is a schematic diagram of a voltage conversion module in one embodiment, as shown in FIG. Figure 3 As shown, in an exemplary embodiment, optionally, the voltage conversion module 203 includes a first conversion unit 2031 and a second conversion unit 2032 , and the first conversion unit 2031 and the second conversion unit 2032 are respectively connected to the feedback winding 101 .

[0080] Furthermore, the conversion efficiency of the second conversion unit 2032 is lower than that of the first conversion unit 2031. In other words, the ratio of the output power to the input power of the second conversion unit 2032 is lower than that of the first conversion unit 2031.

[0081] Optionally, the first conversion unit 2031 includes, but is not limited to, a buck converter (BUCK) circuit, a linear voltage regulator module, a traditional transformer, a low-resistance load device, etc. The second conversion unit 2032 includes, but is not limited to, a linear voltage regulator (LDO), a direct current (DC-DC) conversion module, and a high-resistance load device. The DC-DC conversion module may be an LLC, a buck converter, a boost converter, a buck-boost converter, a forward converter, or a push-pull converter. For example, if the first conversion unit 2031 is a buck circuit and the second conversion unit 2032 is an LDO, the buck circuit has a conversion efficiency of approximately 96%, while the LDO has a conversion efficiency of approximately 50%.

[0082] Furthermore, the first control module 201 is configured to be in a first state when the first control signal is at a first level for controlling the first element to stop working, and, when in the first state, control the first path between the feedback winding 101 and the first conversion unit 2031 to be connected, so as to convert the feedback voltage into a preset voltage through the first path; and to be in a second state when the first control signal is at a second level for controlling the start-up of the first element, and, when in the second state, control the second path between the feedback winding 101 and the second conversion unit 2032 to be connected, so as to convert the feedback voltage into the preset voltage through the second path.

[0083] In other words, after receiving the first level, the first control module 201 is in the first state and controls the first conversion unit 2031 to operate, thereby converting the feedback voltage into the preset voltage through the first conversion unit 2031. After receiving the second level, the first control module 201 is in the second state and controls the second conversion unit 2032 to operate, thereby converting the feedback voltage into the preset voltage through the second conversion unit 2032.

[0084] Optionally, the first control module 201 may switch the first path and the second path through a switch element in the first control module 201. For example, the switch element in the first control module 201 may include, but is not limited to, a relay or a single-pole double-throw switch.

[0085] In the above embodiment, the voltage conversion module 203 includes a first conversion unit 2031 and a second conversion unit 2032 , which are respectively connected to the feedback winding 101 ; the conversion efficiency of the second conversion unit 2032 is lower than that of the first conversion unit 2031 . Since the first control module 201 is configured to be in a first state when the first control signal is at a first level for controlling the first element to stop operating, and in the first state, control the first path between the feedback winding 101 and the first conversion unit 2031 to be conductive, thereby converting the feedback voltage into a preset voltage via the first path; and to be in a second state when the first control signal is at a second level for controlling the first element to start operating, and in the second state, control the second path between the feedback winding 101 and the second conversion unit 2032 to be conductive, thereby converting the feedback voltage into the preset voltage via the second path, when the first element starts operating, causing the secondary voltage to drop, resulting in the power of the secondary winding 102 being greater than the power of the feedback winding 101, that is, when the feedback winding 101 is lightly loaded and the secondary winding 102 is heavily loaded, the second conversion unit 2032, which has a low conversion efficiency, can increase the load on the feedback winding 101, thereby achieving power balance between the feedback winding 101 and the secondary winding 102, thereby avoiding operational failure of the energy storage power supply due to the start of the first element and improving the reliability of the energy storage power supply.

[0086] Figure 4 FIG. 1 is a schematic diagram of a second control module in an embodiment, Figure 4 As shown, in an exemplary embodiment, optionally, the second control module 202 includes a first control unit 2021 and a first switch unit 2022 connected to each other. The first control unit 2021 is used to receive the second control signal, and the first switch unit 2022 is connected to the first control module 201.

[0087] Furthermore, the first control unit 2021 is used to output a disconnect signal to the first switch unit 2022 when the second control signal is at the third level for controlling the second element to stop working, and to output a conduction signal to the first switch unit 2022 when the second control signal is at the fourth level for controlling the second element to start.

[0088] Optionally, the first control unit 2021 includes at least one switching element. Exemplarily, the switching element in the first control unit 2021 is in an off state after receiving the third electrical level, thereby outputting a disconnection signal to the first switching unit 2022; and the switching element in the first control unit 2021 is in an on state after receiving the fourth electrical level, thereby outputting a connection signal to the first switching unit 2022.

[0089] The disconnect signal is used to disconnect the control path between the first switch unit 2022 and the first control module 201. The connect signal is used to connect the control path between the first switch unit 2022 and the first control module 201. Furthermore, upon receiving the disconnect signal, the first switch unit 2022 disconnects the control path between the first switch unit 2022 and the first control module 201. In this case, the second control module 202 does not affect the state of the first control module 201; the state of the first control module 201 is solely governed by the first control signal. However, upon receiving the connect signal, the first switch unit 2022 connects the control path. In this case, the second control module 202 can control the first control module 201, controlling the first control module 201 to the first state via the control path.

[0090] Optionally, the first switch unit 2022 may also include at least one switch element connected to the first control module 201. After the first switch unit 2022 receives a disconnect signal, the switch element in the first switch unit 2022 is in a cut-off state, so that the control path is disconnected. After the first switch unit 2022 receives a turn-on signal, the switch element in the first switch unit 2022 is in a turn-on state, so that the control path is turned on.

[0091] In the above embodiment, the second control module 202 includes a first control unit 2021 and a first switch unit 2022, which are interconnected. The first control unit 2021 is configured to receive a second control signal, and the first switch unit 2022 is connected to the first control module 201. The first control unit 2021 is configured to output a disconnect signal to the first switch unit 2022 when the second control signal is at a third level, which controls the second element to stop operating, and to output a connect signal to the first switch unit 2022 when the second control signal is at a fourth level, which controls the second element to start operating. Therefore, the first switch unit 2022 can efficiently and accurately disconnect the control path between the first switch unit 2022 and the first control module 201 upon receiving the disconnect signal, and connect the control path upon receiving the connect signal, thereby controlling the first control module 201 to the first state via the control path.

[0092] Please continue to refer to Figure 4 In an exemplary embodiment, optionally, the first control unit 2021 includes a switch subunit 2021a, an operational amplifier subunit 2021b, and a charging subunit 2021c. The operational amplifier subunit 2021b is connected to the switch subunit 2021a and the charging subunit 2021c, respectively. The charging subunit 2021c is connected to the first switch unit 2022. The switch subunit 2021a is configured to receive the second control signal. The operational amplifier subunit 2021b is also connected to the feedback winding 101.

[0093] Furthermore, when the second control signal is at the third level, the switch subunit 2021a is in the off state, and when the second control signal is at the fourth level, the switch subunit 2021a is in the on state. For example, the switch subunit 2021a may be a transistor.

[0094] Furthermore, when the switch subunit 2021a is in the on state, the operational amplifier subunit 2021b charges the charging subunit 2021c via the feedback voltage of the feedback winding 101. The operational amplifier subunit 2021b may include at least one operational amplifier. The charging subunit 2021c may include at least one energy storage element, including but not limited to a battery or a capacitor.

[0095] Furthermore, during the charging process of the charging subunit 2021c, the voltage across the charging subunit 2021c, i.e., the charging voltage of the charging subunit 2021c, increases. When the charging voltage of the charging subunit 2021c is greater than a preset charging threshold, the charging voltage can be used to control the first switch unit 2022 to be in an on state. The preset charging threshold can be set according to actual needs and is not limited in this embodiment.

[0096] Optionally, the first switch unit 2022 may include at least one switching element connected to the charging subunit 2021c, so that after the charging voltage of the charging subunit 2021c is greater than a preset charging threshold, the first switch unit 2022 can be controlled to be in an on state through the switching element in the first switch unit 2022.

[0097] In the above embodiment, the first control unit 2021 includes a switch subunit 2021a, an operational amplifier subunit 2021b and a charging subunit 2021c; the operational amplifier subunit 2021b is connected to the switch subunit 2021a and the charging subunit 2021c respectively, the charging subunit 2021c is connected to the first switch unit 2022, the switch subunit 2021a is used to receive the second control signal, and the operational amplifier subunit 2021b is also connected to the feedback winding 101. Since the switch subunit 2021a is used to be in the cut-off state when the second control signal is at the third level, and to be in the on state when the second control signal is at the fourth level, and the operational amplifier subunit 2021b is used to charge the charging subunit 2021c through the feedback voltage when the switch subunit 2021a is in the on state, so as to control the first switch unit 2022 to be in the on state when the charging voltage of the charging subunit 2021c is greater than the preset charging threshold, therefore, the charging subunit 2021c can be used to control the first switch unit 2022 to be in the on state after the second element starts and stabilizes, thereby further improving the reliability of the energy storage power supply.

[0098] Figure 5 FIG. 1 is a schematic diagram of another startup control circuit in an embodiment, Figure 5 As shown, in an exemplary embodiment, optionally, the switch subunit 2021a includes a first transistor Q3 and a second transistor Q4.

[0099] The gate of the first transistor Q3 is used to receive the second control signal FAN_PWM, the drain of the first transistor Q3 is connected to the base of the second transistor Q4, and the source of the first transistor Q3 is grounded.

[0100] Please continue to refer to Figure 5 , Figure 5 Taking the operational amplifier sub-unit 2021b including the operational amplifier U1A as an example, the emitter of the second transistor Q4 and the base of the second transistor Q4 are both connected to the feedback winding 101, the collector of the second transistor Q4 is connected to the non-inverting input terminal of the operational amplifier sub-unit 2021b, and the inverting input terminal of the operational amplifier sub-unit 2021b is grounded.

[0101] In the above embodiment, the switch subunit 2021a includes a first transistor Q3 and a second transistor Q4. Since the gate of the first transistor Q3 is used to receive the second control signal, the drain of the first transistor Q3 is connected to the base of the second transistor Q4, and the source of the first transistor Q3 is grounded; the emitter and base of the second transistor Q4 are both connected to the feedback winding 101, the collector of the second transistor Q4 is connected to the non-inverting input of the operational amplifier subunit 2021b, and the inverting input of the operational amplifier subunit 2021b is grounded, the state of the second control module 202 can be accurately and efficiently controlled by the second control signal.

[0102] Please continue to refer to Figure 5 In an exemplary embodiment, optionally, the first switch unit 2022 includes a third transistor Q5 , wherein a gate of the third transistor Q5 is connected to the first control unit 2021 , a source of the third transistor Q5 is grounded, and a drain of the third transistor Q5 is connected to the first control module 201 .

[0103] like Figure 5 As shown, taking the charging subunit 2021c including the capacitor C6 as an example, when the second control signal FAN_PWM is at a low level, the first transistor Q3 is in the off state, so that the second transistor Q4 is also in the off state, the output end of the operational amplifier U1A outputs a low level, and the third transistor Q5 is also in the off state.

[0104] When the second control signal FAN_PWM is at a high level, the first transistor Q3 is in an on state, so that the second transistor Q4 is also in an on state, and the feedback voltage of 12V_P is input to the non-inverting input terminal of the operational amplifier U1A through the second transistor Q4, so that the output voltage of the operational amplifier U1A charges the capacitor C6.

[0105] Figure 6 FIG. 1 is a schematic diagram of a second component startup process in one embodiment. Figure 6 Figure (a) shows the change of the second control signal FAN_PWM over time. Figure 6 In FIG. 1 , the horizontal axis represents time, and the vertical axis represents the level of the second control signal FAN_PWM, where 1 represents a high level and 0 represents a low level. Figure 6 As shown in FIG. 1 , during the soft start process of the second element, the duty cycle of the second control signal FAN_PWM gradually increases. Figure 6 Figure (b) shows how the voltage of capacitor C6 changes with time. Figure 6 The horizontal axis of Figure (b) represents time, and the vertical axis represents the voltage of capacitor C6, as shown in Figure 6 As shown in FIG. 1( b ), during the soft start process of the second element, the voltage of the capacitor C6 gradually increases. When the voltage across the capacitor C6 is greater than the turn-on voltage of the third transistor Q5 , the third transistor Q5 is turned on.

[0106] In the above embodiment, the first switch unit 2022 includes a third transistor Q5. Since the gate of the third transistor Q5 is connected to the first control unit 2021, the source of the third transistor Q5 is grounded, and the drain of the third transistor Q5 is connected to the first control module 201, the state of the first control module 201 can be controlled according to the state of the second control module 202.

[0107] Figure 7 FIG. 1 is a schematic diagram of a first control module in an embodiment, as shown in FIG. Figure 7 As shown, in an exemplary embodiment, optionally, the first control module 201 includes a relay control unit 2011 and a relay switching unit 2012. The relay switching unit 2012 is connected to the relay control unit 2011, the input end of the voltage conversion module 203, and the feedback winding 101, respectively, and the relay control unit 2011 is also connected to the feedback winding 101.

[0108] It is understood that the first switching signal and the second switching signal are different. Optionally, the first switching signal and the second switching signal can be signals of different levels. For example, the first switching signal is a high level and the second switching signal is a low level. Of course, the first switching signal can also be a low level and the second switching signal is a high level. In some embodiments, the first switching signal and the second switching signal can also be different digital signals or other forms of electrical signals, and this embodiment is not limited to this.

[0109] Optionally, the relay control unit 2011 may include at least one switching element. The switching element in the relay control unit 2011 is in an off state when receiving a first level, and is in an on state when receiving a second level.

[0110] Furthermore, the relay switching unit 2012 controls the first path to be conductive upon receiving a first switching signal, and controls the second path to be conductive upon receiving a second switching signal. Optionally, the relay switching unit 2012 may also include at least one switching element. The switching element in the relay switching unit 2012 connects the first path upon receiving the first switching signal, and connects the second path upon receiving the second switching signal. Further, optionally, the relay switching unit 2012 controls the first path to be conductive when the relay control unit 2011 is in the off state, and controls the second path to be conductive when the relay control unit 2011 is in the on state.

[0111] In the above embodiment, the first control module 201 includes a relay control unit 2011 and a relay switching unit 2012. The relay switching unit 2012 is respectively connected to the relay control unit 2011, the input end of the voltage conversion module 203, and the feedback winding 101 of the flyback circuit 100. The relay control unit 2011 is also connected to the feedback winding 101. Because the relay control unit 2011 is capable of receiving a first control signal and outputting a first switching signal to the relay switching unit 2012 when the first control signal is at a first level, and outputting a second switching signal to the relay switching unit 2012 when the first control signal is at a second level, the relay switching unit 2012 can efficiently control the first path to be conductive when it receives the first switching signal, and control the second path to be conductive when it receives the second switching signal.

[0112] Please continue to refer to Figure 6In an exemplary embodiment, the relay control unit 2011 optionally includes a first subunit 2011a and a second subunit 2011b connected to each other, wherein the first subunit 2011a is used to receive the first control signal, and the second subunit 2011b is connected to the relay switching unit 2012.

[0113] Furthermore, the first subunit 2011a can be in the cut-off state when the first control signal is at the first level, and control the second subunit 2011b to be in the cut-off state. Then, when the second subunit 2011b is in the cut-off state, the second subunit 2011b will output the first switching signal to the relay switching unit 2012.

[0114] When the first control signal is at the second level, the first subunit 2011a can be in the on state and control the second subunit 2011b to be in the on state. Furthermore, when the second subunit 2011b is in the on state, the second subunit 2011b outputs the second switching signal to the relay switching unit 2012.

[0115] That is, the first subunit 2011a is in an off state when receiving a first electrical level, and is in an on state when receiving a second electrical level. The second subunit 2011b can follow the state of the first subunit 2011a. Furthermore, when the second subunit 2011b is off, it outputs a first switching signal to the relay switching unit 2012, and when the second subunit 2011b is on, it outputs a second switching signal to the relay switching unit 2012. For example, both the first subunit 2011a and the second subunit 2011b can be transistors.

[0116] In the above embodiment, the relay control unit 2011 includes a first subunit 2011a and a second subunit 2011b connected to each other. The first subunit 2011a receives a first control signal, and the second subunit 2011b is connected to the relay switching unit 2012. Since the first subunit 2011a can be in an off state when the first control signal is at a first level and control the second subunit 2011b to be in an off state so that the second subunit 2011b outputs the first switching signal to the relay switching unit 2012, and can be in an on state when the first control signal is at a second level and control the second subunit 2011b to be in an on state so that the second subunit 2011b outputs the second switching signal to the relay switching unit 2012, the first subunit 2011a and the second subunit 2011b can cooperate to output the corresponding first switching signal or second switching signal based on the first control signal, so that the flyback circuit 100 can promptly switch to the second conversion unit 2032 for voltage conversion when the switching condition is met.

[0117] Please continue to refer to Figure 5 In an exemplary embodiment, optionally, the first subunit 2011a includes a fourth transistor Q6, and the second subunit 2011b includes a fifth transistor Q7.

[0118] The base of the fourth transistor Q6 is used to receive the first control signal RLY_Drv, the collector of the fourth transistor Q6 is connected to the base of the fifth transistor Q7, and the emitter of the fourth transistor Q6 is grounded.

[0119] The base of the fifth transistor Q7 is also connected to the feedback winding 101 , the emitter of the fifth transistor Q7 is connected to the feedback winding 101 via the relay switching unit 2012 , and the collector of the fifth transistor Q7 is grounded.

[0120] Please continue to refer to Figure 5 If the first control signal RLY_Drv is at a low level, the fourth transistor Q6 is in the off state, so that the fifth transistor Q7 is also in the off state. In this case, the first subunit 2011a outputs the first switching signal to the second subunit 2011b.

[0121] If the first control signal RLY_Drv is at a high level, the fourth transistor Q6 is turned on, so that the fifth transistor Q7 is also turned on. In this case, the first subunit 2011a outputs the second switching signal to the second subunit 2011b.

[0122] In the above embodiment, the first subunit 2011a includes a fourth transistor Q6, and the second subunit 2011b includes a fifth transistor Q7. Since the base of the fourth transistor Q6 is used to receive the first control signal, the collector of the fourth transistor Q6 is connected to the base of the fifth transistor Q7, and the emitter of the fourth transistor Q6 is grounded; the base of the fifth transistor Q7 is also connected to the feedback winding 101, the emitter of the fifth transistor Q7 is connected to the feedback winding 101 via the relay switching unit 2012, and the collector of the fifth transistor Q7 is grounded, the relay control unit 2011 can accurately output the first switching signal to the relay switching unit 2012 when the first control signal is at a first level, and can accurately output the second switching signal to the relay switching unit 2012 when the first control signal is at a second level.

[0123] Please continue to refer to Figure 5 In an exemplary embodiment, optionally, the relay switching unit 2012 includes a relay RLY1, and the relay RLY1 includes a coil, a first contact (ie Figure 5 Pin 3 shown in FIG), the second contact (ie Figure 5 Pin 4 shown in the figure) and the third contact (i.e. Figure 4Pin 5 shown in the figure).

[0124] Among them, the first end of the coil (that is, Figure 5 Pin 1 shown in FIG) is connected to the feedback winding 101, and the second end of the coil (i.e. Figure 5 Pin 2 shown in FIG) is connected to the first control module 201; the first contact is connected to the feedback winding 101, the second contact is connected to the input end of the first conversion unit 2031, and the third contact is connected to the input end of the second conversion unit 2032;

[0125] Furthermore, the relay switching unit 2012 is configured to control the feedback winding 101 to stop energizing the coil upon receiving the first switching signal, and connect the first contact and the second contact to conduct the first path, so that the first conversion unit 2031 operates.

[0126] The relay switching unit 2012 is further configured to, upon receiving the second switching signal, control the feedback winding 101 to energize the coil and connect the first contact and the third contact to switch to the second path being conductive, thereby enabling the second conversion unit 2032 to operate.

[0127] In the above embodiment, the relay switching unit 2012 includes a coil, a first contact, a second contact, and a third contact. The first end of the coil is connected to the feedback winding 101, and the second end of the coil is connected to the first control module 201. The first contact is connected to the feedback winding 101, the second contact is connected to the input end of the first conversion unit 2031, and the third contact is connected to the input end of the second conversion unit 2032. Since the relay switching unit 2012 can control the feedback winding 101 to stop energizing the coil and connect the first and second contacts to conduct the first path upon receiving a first switching signal, and control the feedback winding 101 to energize the coil and connect the first and third contacts to conduct the second path upon receiving a second switching signal, the relay switching unit 2012 can efficiently implement switching between the first conversion unit 2031 and the second conversion unit 2032 using the first control signal.

[0128] Figure 8 FIG. 1 is a schematic diagram of another first control module in an embodiment, Figure 8As shown, in an exemplary embodiment, optionally, the first control module 201 includes a second switch unit 2013, a third switch unit 2014, and a fourth switch unit 2015. The second switch unit 2013 is connected to the third switch unit 2014 and the fourth switch unit 2015, respectively. The third switch unit 2014 is connected to the feedback winding 101 and the first conversion unit 2031, respectively. The fourth switch unit 2015 is connected to the feedback winding 101 and the second conversion unit 2032, respectively. Optionally, the second switch unit 2013, the third switch unit 2014, and the fourth switch unit 2015 can all be implemented by at least one switching element.

[0129] The second switch unit 2013 is configured to receive the first control signal, and is in a cut-off state when the first control signal is at a first level, and is in a conduction state when the first control signal is at a second level.

[0130] The third switch unit 2014 is configured to be in the on state when the second switch unit 2013 is in the off state and control the first path to be on, and to be in the off state when the second switch unit 2013 is in the on state and control the first path to be off.

[0131] The fourth switch unit 2015 is configured to be in the off state when the second switch unit 2013 is in the off state and control the second path to be disconnected, and to be in the on state when the second switch unit 2013 is in the on state and control the second path to be connected.

[0132] In this way, the states of the third and fourth switch units 2014 and 2015 can be controlled by the state of the second switch unit 2013, such that the third switch unit 2014 is in the on state when the second switch unit 2013 is in the off state, and controls the first path to be on; and the third switch unit 2014 is in the off state when the second switch unit 2013 is in the on state, and controls the first path to be off. Furthermore, the fourth switch unit 2015 is in the off state when the second switch unit 2013 is in the off state, and controls the second path to be off; and the fourth switch unit 2015 is in the on state when the second switch unit 2013 is in the on state, and controls the second path to be on. In this manner, switching between the first conversion unit 2031 and the second conversion unit 2032 can also be achieved.

[0133] Figure 9 FIG. 1 is a schematic diagram of another startup control circuit in an embodiment, Figure 9 As shown, in an exemplary embodiment, optionally, the second switch unit 2013 includes a sixth transistor Q8, the third switch unit 2014 includes a seventh transistor Q9, and the fourth switch unit 2015 includes an eighth transistor Q10.

[0134] The gate of the sixth transistor Q8 is used to receive the first control signal RLY_Drv, the source of the sixth transistor Q8 is grounded, and the drain of the sixth transistor Q8 is connected to the base of the seventh transistor Q9 and the base of the eighth transistor Q10 respectively.

[0135] The emitter of the seventh transistor Q9 is grounded, the collector of the seventh transistor Q9 is connected to the first conversion unit 2031, and the base of the seventh transistor Q9 is also connected to the feedback winding 101. Optionally, the collector of the seventh transistor Q9 is connected to the enable pin of the first conversion unit 2031.

[0136] An emitter of the eighth transistor Q10 is connected to the feedback winding 101 , and a collector of the eighth transistor Q10 is connected to the second conversion unit 2032 .

[0137] Further optionally, the first control module 201 further includes a first unidirectional conducting unit and a second unidirectional conducting unit. Optionally, the first unidirectional conducting unit includes but is not limited to at least one diode, and the second unidirectional conducting unit includes but is not limited to at least one diode.

[0138] Figure 9 For example, the first unidirectional conductive unit includes a diode D3 and the second unidirectional conductive unit includes a diode D4. Figure 9 As shown, the anode of the first unidirectional conducting unit, that is, the anode of the diode D3, is connected to the base of the seventh transistor Q9, and the cathode of the first unidirectional conducting unit, that is, the cathode of the diode D3, is connected to the drain of the sixth transistor Q8. The anode of the second unidirectional conducting unit, that is, the anode of the diode D4, is connected to the base of the eighth transistor Q10, and the cathode of the second unidirectional conducting unit, that is, the cathode of the diode D4, is connected to the drain of the sixth transistor Q8.

[0139] Please continue to refer to Figure 9 If the first control signal RLY_Drv is at a low level, the sixth transistor Q8 is in the off state, so that the eighth transistor Q10 is in the off state and the seventh transistor Q9 is in the on state, so as to pull the enable (EN) pin of the first conversion unit 2031 to ground. At this time, the first path is turned on and the second path is turned off.

[0140] If the first control signal RLY_Drv is at a high level, the sixth transistor Q8 is in a conducting state, so that the eighth transistor Q10 is in a conducting state. At this time, the first path is disconnected and the second path is connected.

[0141] In the above embodiment, the second switch unit 2013 includes a sixth transistor Q8, the third switch unit 2014 includes a seventh transistor Q9, and the fourth switch unit 2015 includes an eighth transistor Q10. Since the gate of the sixth transistor Q8 is used to receive the first control signal, the source of the sixth transistor Q8 is grounded, and the drain of the sixth transistor Q8 is connected to the bases of the seventh transistor Q9 and the eighth transistor Q10, respectively; the emitter of the seventh transistor Q9 is grounded, the collector of the seventh transistor Q9 is connected to the first conversion unit 2031, and the base of the seventh transistor Q9 is also connected to the feedback winding 101; the emitter of the eighth transistor Q10 is connected to the feedback winding 101, and the collector of the eighth transistor Q10 is connected to the second conversion unit 2032, the first conversion unit 2031 and the second conversion unit 2032 can be efficiently switched according to the first control signal via the sixth transistor Q8, the seventh transistor Q9, and the eighth transistor Q10. Furthermore, since the first control module 201 also includes a first unidirectional conduction unit and a second unidirectional conduction unit; the positive electrode of the first unidirectional conduction unit is connected to the base of the seventh transistor Q9, and the negative electrode of the first unidirectional conduction unit is connected to the drain of the sixth transistor Q8; the positive electrode of the second unidirectional conduction unit is connected to the base of the eighth transistor Q10, and the negative electrode of the second unidirectional conduction unit is connected to the drain of the sixth transistor Q8, therefore, the working reliability of the first control module 201 can be improved by the first unidirectional conduction unit and the second unidirectional conduction unit.

[0142] Figure 10 FIG. 1 is a schematic diagram of another startup control circuit in an embodiment, Figure 10 As shown, in an exemplary embodiment, optionally, the first control module 201 further includes a fifth switch unit, and the fifth switch unit includes a ninth transistor Q11.

[0143] The emitter of the ninth transistor Q11 is connected to the feedback winding 101 , the collector of the ninth transistor Q11 is connected to the first conversion unit 2031 , and the base of the ninth transistor Q11 is connected to the collector of the seventh transistor Q9 .

[0144] Please refer to Figure 11 If the first control signal RLY_Drv is at a low level, the sixth transistor Q8 is in the off state, the eighth transistor Q10 is in the off state, the seventh transistor Q9 is in the on state, and the ninth transistor Q11 is also in the on state, the first path is turned on, and the second path is turned off.

[0145] If the first control signal RLY_Drv is high, the sixth transistor Q8 is on, the seventh transistor Q9 is off, the eighth transistor Q10 is on, and the ninth transistor Q11 is off. The first path is disconnected and the second path is on.

[0146] In the above embodiment, the first control module 201 further includes a fifth switch unit, which includes a ninth transistor Q11. Since the emitter of the ninth transistor Q11 is connected to the feedback winding 101, the collector of the ninth transistor Q11 is connected to the first conversion unit 2031, and the base of the ninth transistor Q11 is connected to the collector of the seventh transistor Q9, the conduction of the first path or the second path can be reliably controlled by the ninth transistor Q11.

[0147] In an exemplary embodiment, the first component is optionally turned on later than the second control module 202. Alternatively, taking the example of a relay in an inverter circuit, the relay's pickup time in the inverter circuit needs to be later than the on-time of the relay control unit 2011 or the first switch unit 2022. This allows the first component to be controlled and started after the second conversion unit 2032 is switched on, further improving the reliability of the energy storage power supply.

[0148] In an exemplary embodiment, please refer to Figures 5 to 11 Optionally, the startup control circuit 200 further includes at least one of the following:

[0149] (1) Resistor R7. The first end of resistor R7 is used to receive the second control signal FAN_PWM, and the second end of resistor R7 is connected to the gate of the first transistor Q3. (2) Resistor R8. The first end of resistor R8 is used to receive the second control signal FAN_PWM, and the second end of resistor R8 is grounded. (3) Resistor R9. Resistor R9 is connected to the drain of the first transistor Q3 and the feedback winding 101, respectively. (4) Resistor R10. Resistor R10 is connected to the emitter of the second transistor Q4 and the feedback winding 101, respectively. (5) Resistor R11. Resistor R11 is connected to the collector of the second transistor Q4 and the non-inverting input terminal of the operational amplifier subunit 2021b, respectively. (6) Resistor R12. Resistor R12 is connected to the output terminal of the operational amplifier subunit 2021b and the gate of the third transistor Q5, respectively. (7) Resistor R13. The first end of resistor R13 is connected to the gate of the third transistor Q5, and the second end of resistor R13 is grounded. (8) Resistor R14. The first end of resistor R14 is used to receive the first control signal RLY_Drv, and the second end of resistor R14 is connected to the base of the fourth transistor Q6. (9) Resistor R15. The first end of resistor R15 is connected to the base of the fourth transistor Q6, and the second end of resistor R15 is grounded. (10) Resistor R16. Resistor R16 is connected to the feedback winding 101 and the base of the fifth transistor Q7, respectively. (11) Resistor R17. Resistor R17 is connected to the emitter of the fifth transistor Q7 and the second end of the coil, respectively. (12) Resistor R18. Resistor R18 is connected to the collector of the fourth transistor Q6 and the base of the fifth transistor Q7, respectively. (13) Resistor R19. The first end of resistor R19 is used to receive the first control signal RLY_Drv, and the second end of resistor R19 is connected to the gate of the sixth transistor Q8. (14) Resistor R20. The first end of resistor R20 is connected to the gate of the sixth transistor Q8, and the second end of resistor R20 is grounded. (15) Resistor R21. The first end of resistor R21 is connected to the base of the seventh transistor Q9, and the second end of resistor R21 is grounded. (16) Resistor R22. Resistor R22 is connected to the base of the seventh transistor Q9 and the base of the eighth transistor Q10, respectively. (17) Resistor R23. Resistor R23 is connected to the input terminal and the enable terminal of the first conversion unit 2031, respectively. (18) Resistor R24. Resistor R24 ​​is connected to the base of the eighth transistor Q10 and the drain of the sixth transistor Q8, respectively. (19) Resistor R25. Resistor R25 is connected to the feedback winding 101 and the base of the seventh transistor Q9, respectively. (20) Resistor R26. Resistor R26 is connected to the feedback winding 101 and the positive electrode of the diode D3, respectively. (21) Resistor R27. The resistor R27 is connected to the feedback winding 101 and the base of the ninth transistor Q11, respectively. (22) Capacitor C4. The first end of the capacitor C4 is connected to the output end of the second conversion unit 2032, and the second end of the capacitor C4 is grounded. (23) Capacitor C5.A first end of the capacitor C5 is connected to the feedback winding 101 , and a second end of the capacitor C5 is grounded.

[0150] By using at least one of the resistors or capacitors, the stability and reliability of the startup control circuit 200 can be further improved.

[0151] In order to more clearly introduce the startup control circuit 200 of the present application, the following description will be made in conjunction with the working process of the energy storage power supply.

[0152] Please refer to Figure 5 During operation process A, the fan is not started, the second control signal FAN_PWM is low, the first transistor Q3 is off, the base and emitter of the second transistor Q4 are at equal potential, and the second transistor Q4 is also off. The output of the operational amplifier U1A outputs a low level, and therefore the third transistor Q5 is also off. Furthermore, the relay in the inverter circuit is not started, the first control signal RLY_Drv is low, the fourth transistor Q6 is off, and the base and emitter of the fifth transistor Q7 are at equal potential, and the fifth transistor Q7 is also off. The coil of relay RLY1 has no current loop, and relay RLY1 does not operate. Relay RLY1 maintains pins 3 and 4 connected, the first path is conductive, and the feedback voltage of feedback winding 12V_P is converted to a preset voltage of 5V by the first conversion unit 2031. At this point, the power of feedback winding 12V_P is relatively balanced with the power of secondary winding 12V_S, and the secondary voltage does not change significantly, which does not affect normal operation.

[0153] During operation B, the fan is not yet started, the second control signal FAN_PWM is low, and the first, second, and third transistors Q3, Q4, and Q5 are all off. However, the relay in the inverter circuit needs to be activated, and the first control signal RLY_Drv is high. The fourth transistor Q6 is on, and resistors R16 and R18 divide the feedback voltage of the feedback winding 12V_P, causing the base potential of the fifth transistor Q7 to be lower than the emitter potential. The fifth transistor Q7 is also on, and the coil of relay RLY1 forms a current loop powered by the feedback winding 12V_P. Relay RLY1 operates, switching from pins 3 and 4 to pins 3 and 5. The second path is conductive, and the feedback voltage of the feedback winding 12V_P is converted to a preset voltage of 5V by the second conversion unit 2032. If relay RLY1 operates at 1.5W, the power of feedback winding 12V_P on the display and control chip is approximately 2.5W. The total power of feedback winding 12V_P is 5W, and the total power of secondary winding 12V_S is 2W. The power of feedback winding 12V_P is significantly greater than that of secondary winding 12V_S, so the voltage of secondary winding 12V_S will rise, but this will not affect normal operation. It should be noted that to improve reliability, the withstand voltage of the device powered by the voltage of secondary winding 12V_S must be greater than the voltage after the secondary winding 12V_S voltage rises.

[0154] Furthermore, the first control signal RLY_Drv is a signal for controlling the closing of the relay of the inverter circuit and the conduction of the fourth transistor Q6. Since a certain amount of time is required for the relay RLY1 to switch, in order to avoid the relay of the inverter circuit closing before the relay RLY1 has completed switching, thereby causing the voltage of the secondary winding 12V_S to drop, thereby causing the relay of the inverter circuit to fail to close, therefore, the closing time of the relay of the inverter circuit controlled by the first control signal RLY_Drv needs to be delayed after the conduction time of the fourth transistor Q6.

[0155] After the delay, the relay of the inverter circuit is energized. At this time, the total power of the secondary winding 12V_S increases to 5W, and the total power of the feedback winding 12V_P remains at 5W. In this way, the conversion loss of the second conversion unit 2032 can be used to make the energy coupling on both sides relatively balanced.

[0156] In operation process C, the fan needs to be started. The second control signal FAN_PWM is high, the first transistor Q3 is in the on-state, and the base of the second transistor Q4 is low, so the second transistor Q4 is also in the on-state. The feedback voltage 12V_P is input to the non-inverting input of the operational amplifier U1A through the second transistor Q4. The output voltage of the operational amplifier U1A charges the capacitor C6 through the RC circuit consisting of the resistor R12 and the capacitor C6. During the fan soft-start process, the duty cycle of the second control signal FAN_PWM gradually increases, and the voltage of the capacitor C6 also gradually increases. When the voltage of the capacitor C6 is greater than the turn-on voltage of the third transistor Q5, the third transistor Q5 is turned on, pulling the base of the fourth transistor Q6 or the gate of the sixth transistor Q8 to ground, turning the fourth transistor Q6 or the sixth transistor Q8 off. As a result, the first path is turned on, and the feedback voltage of the feedback winding 12V_P is converted to a preset voltage of 5V by the first conversion unit 2031. At this time, the power of the feedback winding 12V_P is 5W, and the power of the secondary winding 12V_S is 5W. The energy coupling on both sides remains relatively balanced, and the energy storage power supply maintains normal operation.

[0157] Furthermore, the relay of the inverter circuit is closed, the energy storage power supply operates normally, and the voltage of the secondary winding 12V_S, that is, the secondary voltage is restored to the original voltage.

[0158] Please refer to Figure 9 ,and Figure 5 The control principle is similar to that of . In operation process A, the second control signal FAN_PWM is at a low level, and the first transistor Q3, the second transistor Q4, and the third transistor Q5 are all in the off state. The first control signal RLY_Drv is at a low level, and the sixth transistor Q8 is in the off state, making the base and emitter of the sixth transistor Q8 equal in potential, and the eighth transistor Q10 is in the off state. Furthermore, at this time, the base of the seventh transistor Q9 is at a high level, and the seventh transistor Q9 is in the on state, pulling the enable pin EN of the first conversion unit 2031 to ground, turning on the first path.

[0159] In operation process B, the second control signal FAN_PWM is at a low level, and the first transistor Q3, the second transistor Q4, and the third transistor Q5 are all in the off state. The first control signal RLY_Drv is at a high level, the sixth transistor Q8 is turned on, the resistors R24 and R25 divide the feedback voltage of the feedback winding 12V_P, the base potential of the eighth transistor Q10 is lower than the emitter potential, and the eighth transistor Q10 is in the on state. The base potential of the seventh transistor Q9 is at a low level, and the seventh transistor Q9 is in the off state. The enable pin of the first conversion unit 2031 is at a high level, the second path is turned on, and the second conversion unit 2032 is in operation.

[0160] Similarly, the first control signal RLY_Drv controls the closing time of the relay in the inverter circuit and needs to be delayed before the turn-on time of the sixth transistor Q8. The working process C can refer to the above process and will not be repeated here.

[0161] Please refer to Figure 10 ,and Figure 9 The control principle is similar to that of . In operation process A, the second control signal FAN_PWM is at a low level, and the first transistor Q3, the second transistor Q4, and the third transistor Q5 are all in the off state. The first control signal RLY_Drv is at a low level, and the sixth transistor Q8 is in the off state, making the base and emitter of the eighth transistor Q10 equal in potential, and the eighth transistor Q10 is in the off state. In addition, at this time, the base of the seventh transistor Q9 is at a high level, and the seventh transistor Q9 is in the on state, which in turn increases the base potential of the ninth transistor Q11, causing the ninth transistor Q11 to also be in the on state, and the first path is conductive.

[0162] In operation process B, the second control signal FAN_PWM is at a low level, and the first transistor Q3, the second transistor Q4, and the third transistor Q5 are all in the off state. The first control signal RLY_Drv is at a high level, the sixth transistor Q8 is in the on state, the resistors R24 and R25 divide the feedback voltage of the feedback winding 12V_P, the base potential of the eighth transistor Q10 is lower than the emitter potential, and the eighth transistor Q10 is also in the on state. The base of the ninth transistor Q11 is at a low level, and the ninth transistor Q11 is in the off state. As a result, the ninth transistor Q11 is also in the off state, and the second path is conductive.

[0163] Similarly, the first control signal RLY_Drv controls the closing time of the relay in the inverter circuit and needs to be delayed before the turn-on time of the sixth transistor Q8. The working process C can refer to the above process and will not be repeated here.

[0164] Thus, during no-load operation or the initial charging / discharging phase, the display and control chip are powered by the 12V_P voltage, converted to a preset voltage by the first conversion unit 2031, to maintain low power consumption and reduce battery drain. When the inverter circuit's relay needs to be closed, it is powered by the preset voltage converted by the second conversion unit 2032. This utilizes the operating power of relay RLY1 and the conversion losses of the second conversion unit 2032 to increase the load on the feedback winding 12V_P, thereby raising the voltage of the secondary winding 12V_S. When the inverter circuit's relay is closed, sufficient energy is available on the feedback winding 12V_P to prevent the voltage of the secondary winding 12V_S from dropping below the relay's minimum closing voltage, thereby completing closing and ensuring normal operation of the energy storage power supply. When charging or discharging power increases and the fan begins to rotate, the first conversion unit 2031 is switched back to operation, maintaining low power consumption, reducing battery drain, and extending the operating time of the energy storage power supply.

[0165] It can be seen that the startup control circuit of this embodiment switches the voltage conversion module only when the relay of the inverter circuit needs to be energized, thereby increasing the load on the feedback winding 12V_P to ensure that the relay of the inverter circuit is fully energized and the energy storage power supply operates normally. The startup control circuit maintains low power consumption at other times. In addition, no additional control signal is required, and multiplexing can be achieved by referencing the control signal of the related flyback circuit.

[0166] Figure 11 is a schematic diagram of an energy storage device in one embodiment, such as Figure 11 As shown, in one embodiment, an energy storage device 1100 is further provided, which includes an energy storage power supply 1101 and any of the above startup control circuits 200. The energy storage power supply 1101 includes a flyback circuit 100, a first component 1102, and a second component 1103.

[0167] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), quantum computing-based data processing logic devices, artificial intelligence (AI) processors, and the like.

[0168] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, 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.

[0169] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A startup control circuit for an energy storage power supply, the energy storage power supply comprising a flyback circuit, a first component, and a second component, the flyback circuit comprising a feedback winding and a secondary winding, characterized in that: The startup control circuit includes a second control module, a first control module and a voltage conversion module connected in sequence; the second control module, the first control module and the voltage conversion module are all connected to the feedback winding; The first control module is configured to receive a first control signal from the first component and determine a state of the first control module according to the first control signal; The first control signal is used to control the first element to start or stop working; the second control module is configured to receive a second control signal from the second element, determine a state of the second control module according to the second control signal, and control a state of the first control module according to the state of the second control module; The second control signal is used to control the second element to start or stop working, and the start time of the first element is earlier than the start time of the second element; The voltage conversion module is used to control the conversion efficiency of the voltage conversion module according to the state of the first control module, so as to convert the feedback voltage of the feedback winding into a preset voltage when the difference between the power of the feedback winding and the power of the secondary winding is less than a preset difference, and to power the second element through the feedback voltage, and to power the first element through the secondary voltage of the secondary winding, so as to start the energy storage power supply.

2. The startup control circuit according to claim 1, characterized in that: The voltage conversion module includes a first conversion unit and a second conversion unit, wherein the first conversion unit and the second conversion unit are respectively connected to the feedback winding; the conversion efficiency of the second conversion unit is lower than the conversion efficiency of the first conversion unit; The first control module is configured to be in a first state when the first control signal is at a first level for controlling the first element to stop working, and, in the first state, control the first path between the feedback winding and the first conversion unit to be connected, so as to convert the feedback voltage into the preset voltage through the first path; and to be in a second state when the first control signal is at a second level for controlling the first element to start working, and, in the second state, control the second path between the feedback winding and the second conversion unit to be connected, so as to convert the feedback voltage into the preset voltage through the second path.

3. The startup control circuit according to claim 2, characterized in that: The second control module includes a first control unit and a first switch unit connected to each other; the first control unit is used to receive the second control signal, and the first switch unit is connected to the first control module; the first control unit is configured to output a disconnect signal to the first switch unit when the second control signal is at a third level for controlling the second element to stop working, and to output a connect signal to the first switch unit when the second control signal is at a fourth level for controlling the second element to start working; The first switch unit is configured to disconnect the control path between the first switch unit and the first control module when receiving the disconnect signal, and to turn on the control path when receiving the turn-on signal, so as to control the first control module to the first state through the control path.

4. The startup control circuit according to claim 3, characterized in that: The first control unit includes a switch subunit, an operational amplifier subunit, and a charging subunit; the operational amplifier subunit is connected to the switch subunit and the charging subunit respectively, the charging subunit is connected to the first switch unit, the switch subunit is used to receive the second control signal, and the operational amplifier subunit is also connected to the feedback winding; The switch subunit is configured to be in an off state when the second control signal is at the third level, and to be in an on state when the second control signal is at the fourth level; The operational amplifier subunit is used to charge the charging subunit through the feedback voltage when the switch subunit is in the on state, so as to control the first switch unit to be in the on state when the charging voltage of the charging subunit is greater than a preset charging threshold.

5. The startup control circuit according to claim 4, characterized in that: The switch subunit includes a first transistor and a second transistor; the gate of the first transistor is used to receive the second control signal, the drain of the first transistor is connected to the base of the second transistor, and the source of the first transistor is grounded; The emitter of the second transistor and the base of the second transistor are both connected to the feedback winding, the collector of the second transistor is connected to the non-inverting input terminal of the operational amplifier sub-unit, and the inverting input terminal of the operational amplifier sub-unit is grounded.

6. The startup control circuit according to claim 3, characterized in that: The first switch unit includes a third transistor; the gate of the third transistor is connected to the first control unit, the source of the third transistor is grounded, and the drain of the third transistor is connected to the first control module.

7. The startup control circuit according to any one of claims 2 to 6, characterized in that: The first control module includes a relay control unit and a relay switching unit, the relay switching unit is respectively connected to the relay control unit, the input end of the voltage conversion module and the feedback winding of the flyback circuit, and the relay control unit is also connected to the feedback winding; The relay control unit is configured to receive the first control signal, output a first switching signal to the relay switching unit when the first control signal is at the first level, and output a second switching signal to the relay switching unit when the first control signal is at the second level; The relay switching unit is configured to control the first path to be conductive when the first switching signal is received, and to control the second path to be conductive when the second switching signal is received.

8. The startup control circuit according to claim 7, characterized in that: The relay control unit includes a first subunit and a second subunit connected to each other; the first subunit is used to receive the first control signal, and the second subunit is connected to the relay switching unit; The first subunit is configured to be in an off state when the first control signal is at the first level, and control the second subunit to be in an off state so that the second subunit outputs the first switching signal to the relay switching unit; and to be in an on state when the first control signal is at the second level, and control the second subunit to be in an on state so that the second subunit outputs the second switching signal to the relay switching unit.

9. The startup control circuit according to claim 8, characterized in that: The first subunit includes a fourth transistor, and the second subunit includes a fifth transistor; the base of the fourth transistor is used to receive the first control signal, the collector of the fourth transistor is connected to the base of the fifth transistor, and the emitter of the fourth transistor is grounded; the base of the fifth transistor is also connected to the feedback winding, the emitter of the fifth transistor is connected to the feedback winding through the relay switching unit, and the collector of the fifth transistor is grounded.

10. The startup control circuit according to claim 7, characterized in that: The relay switching unit includes a coil, a first contact, a second contact, and a third contact; the first end of the coil is connected to the feedback winding, and the second end of the coil is connected to the first control module; the first contact is connected to the feedback winding, the second contact is connected to the input end of the first conversion unit, and the third contact is connected to the input end of the second conversion unit; The relay switching unit is configured to, upon receiving the first switching signal, control the feedback winding to stop energizing the coil and connect the first contact and the second contact to conduct the first path; and, upon receiving the second switching signal, control the feedback winding to energize the coil and connect the first contact and the third contact to switch to conducting the second path.

11. The startup control circuit according to any one of claims 2 to 6, characterized in that: The first control module includes a second switch unit, a third switch unit, and a fourth switch unit; the second switch unit is connected to the third switch unit and the fourth switch unit respectively, the third switch unit is connected to the feedback winding and the first conversion unit respectively, and the fourth switch unit is connected to the feedback winding and the second conversion unit respectively; The second switch unit is configured to receive the first control signal, and is in an off state when the first control signal is at the first level, and is in an on state when the first control signal is at the second level; The third switch unit is configured to be in an on state when the second switch unit is in an off state, and control the first path to be on; and to be in an off state when the second switch unit is in an on state, and control the first path to be off; The fourth switch unit is configured to be in an off state when the second switch unit is in an off state and control the second path to be disconnected, and to be in an on state when the second switch unit is in an on state and control the second path to be turned on.

12. The startup control circuit according to claim 11, characterized in that: The second switch unit includes a sixth transistor, the third switch unit includes a seventh transistor, and the fourth switch unit includes an eighth transistor; The gate of the sixth transistor is used to receive the first control signal, the source of the sixth transistor is grounded, and the drain of the sixth transistor is connected to the base of the seventh transistor and the base of the eighth transistor respectively; The emitter of the seventh transistor is grounded, the collector of the seventh transistor is connected to the first conversion unit, and the base of the seventh transistor is also connected to the feedback winding; An emitter of the eighth transistor is connected to the feedback winding, and a collector of the eighth transistor is connected to the second conversion unit.

13. The startup control circuit according to claim 12, characterized in that: The first control module further includes a first one-way conducting unit and a second one-way conducting unit; The positive electrode of the first unidirectional conductive unit is connected to the base of the seventh transistor, and the negative electrode of the first unidirectional conductive unit is connected to the drain of the sixth transistor; An anode of the second unidirectional conductive unit is connected to the base of the eighth transistor, and a cathode of the second unidirectional conductive unit is connected to the drain of the sixth transistor.

14. The startup control circuit according to claim 13, wherein: The first control module further includes a fifth switch unit, and the fifth switch unit includes a ninth transistor; The emitter of the ninth transistor is connected to the feedback winding, the collector of the ninth transistor is connected to the first conversion unit, and the base of the ninth transistor is connected to the collector of the seventh transistor.

15. An energy storage device, characterized in that: The energy storage device includes an energy storage power supply and a startup control circuit according to any one of claims 1 to 14.

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