Starting control circuit of energy storage power supply and energy storage equipment

Abstract

The invention relates to a start control circuit of an energy storage power supply and energy storage equipment. The starting control circuit comprises a first control module used for receiving a first control signal of a first element and determining the state of the first control module according to the first control signal; the second control module is used for receiving a second control signal of the second element, determining the state of the second control module according to the second control signal, and controlling the state of the first control module according to the state of the second control module; and the voltage conversion module is used for controlling 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 under the condition that the difference between the power of the feedback winding and the power of the secondary winding is smaller than a preset difference, and power is supplied to the second element through the feedback voltage, and supplying power to the first element through the secondary voltage of the secondary winding so as to start the energy storage power supply. The starting control circuit can improve the reliability of the energy storage power supply.

Description

Technical Field

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

[0002] Energy storage power supplies are more and more commonly used in various scenarios, and the auxiliary power supply of an energy storage power supply is an important part of the energy storage power supply, which supplies power to components such as a fan, a relay of an inverter circuit, a switching tube driver, a current transformer (CT), a display screen, a control chip, and Bluetooth in the energy storage power supply.

[0003] In related technologies, a flyback circuit is usually used to output different supply voltages, and the supply voltages output by the flyback circuit are used to supply power to the above-mentioned components.

[0004] However, due to the leakage inductance of the transformer in the flyback circuit, there is a cross regulation rate in the flyback circuit. 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 starting control circuit for an energy storage power supply and an energy storage device that can be more reliable in view of the above technical problems.

[0006] In a first aspect, the present application provides a starting control circuit for an energy storage power supply. The energy storage power supply includes a flyback circuit, a first component, and a second component. The flyback circuit includes a feedback winding and a secondary winding. The starting 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] The first control module is configured to receive a first control signal of the first component and determine the state of the first control module according to the first control signal; the first control signal is used to control the first component to start or stop working;

[0008] The second control module is configured to receive a second control signal of the second component, determine the state of the second control module according to the second control signal, and control the 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 component to start or stop working, and the starting time of the first component is earlier than the starting time of the second component;

[0009] The voltage conversion module is configured 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 supply power to the second component through the feedback voltage and supply power to the first component 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 less than that 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 when in the first state, control the first path between the feedback winding and the first conversion unit to conduct, so as to convert the feedback voltage into a preset voltage through the first path. And when the first control signal is at a second level for controlling the first element to start, be in a second state, and when in the second state, control the second path between the feedback winding and the second conversion unit to conduct, so as to convert the feedback voltage into a 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 configured to receive a second control signal, and the first switch unit is connected to the first control module.

[0013] The first control unit is configured to output a disconnection 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 output a conduction signal to the first switch unit when the second control signal is at a fourth level for controlling the second element to start.

[0014] The first switch unit is configured to disconnect the control path between the first switch unit and the first control module when receiving the disconnection signal, and conduct the control path when receiving the conduction signal, so as to control the first control module to be in the first state through the control path.

[0015] In one embodiment, the first control unit includes a switch sub-unit, an operational amplifier sub-unit, and a charging sub-unit. The operational amplifier sub-unit is respectively connected to the switch sub-unit and the charging sub-unit. The charging sub-unit is connected to the first switch unit. The switch sub-unit is configured to receive the second control signal, and the operational amplifier sub-unit is also connected to the feedback winding.

[0016] The switch sub-unit is configured to be in a cut-off state when the second control signal is at the third level, and in a conduction state when the second control signal is at the fourth level.

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

[0018] In one embodiment, the switch sub-unit includes a first transistor and a second transistor; the gate of the first transistor is used to receive a 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 terminal of the voltage conversion module, and the feedback winding of the flyback circuit. The relay control unit is also connected to the feedback winding;

[0022] The relay control unit is configured to receive a first control signal, and 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 conduct when receiving the first switching signal, and control the second path to conduct when receiving the second switching signal.

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

[0025] The first sub-unit is configured to be in a cut-off state when the first control signal is at the first level, and control the second sub-unit to be in a cut-off state, so that the second sub-unit outputs the first switching signal to the relay switching unit. And when the first control signal is at the second level, it is in a conducting state and controls the second sub-unit to be in a conducting state, so that the second sub-unit outputs the second switching signal to the relay switching unit.

[0026] In one embodiment, the first sub-unit includes a fourth transistor, and the second sub-unit includes a fifth transistor; the base of the fourth transistor is configured to receive a 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 a 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; a first end of the coil is connected to the feedback winding, and a second end of the coil is connected to a first control module; the first contact is connected to the feedback winding, the second contact is connected to an input end of a first conversion unit, and the third contact is connected to an input end of a second conversion unit;

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

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

[0030] The second switching unit is configured to receive a first control signal, be in a cut-off state when the first control signal is at a first level, and be in a conducting state when the first control signal is at a second level;

[0031] The third switching unit is configured to be in a conducting state when the second switching unit is in a cut-off state and control the first path to conduct, and be in a cut-off state when the second switching unit is in a conducting state and control the first path to be disconnected;

[0032] The fourth switching unit is configured to be in a cut-off state when the second switching unit is in a cut-off state and control the second path to be disconnected, and be in a conducting state when the second switching unit is in a conducting state and control the second path to conduct.

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

[0034] The gate of the sixth transistor is used to receive a first control signal. The source of the sixth transistor is grounded, and the drain of the sixth transistor is connected to the bases of the seventh transistor and 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] The emitter of the eighth transistor is connected to the feedback winding, and the collector of the eighth transistor is connected to the second conversion unit.

[0037] In one embodiment, the first control module further includes a first unidirectional conduction unit and a second unidirectional conduction unit;

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

[0039] The positive pole of the second unidirectional conduction unit is connected to the base of the eighth transistor, and the negative pole of the second unidirectional conduction unit is connected to the drain of the sixth transistor.

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

[0041] 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.

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

[0043] The start-up control circuit of the above energy storage power supply and the energy storage device. The energy storage power supply includes a flyback circuit, a first component, and a second component. The flyback circuit includes a feedback winding and a secondary winding. The start-up 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 the first control signal of the first component and determine the state of the first control module according to the first control signal, the first control signal is used to control the start or stop of the first component. The second control module is used to receive the second control signal of the second component and determine the state of the second control module according to the second control signal, and control the state of the first control module according to the state of the second control module. The second control signal is used to control the start or stop of the second component. The start time of the first component is earlier than that of the second component. Therefore, with the start of the first component and the second component, the states of the first control module and the second control module will change accordingly. Further, 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 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. In this way, when the power is balanced between the feedback winding and the secondary winding, the second component can be powered by the feedback voltage, and the first component can be powered by the secondary voltage of the secondary winding to start the energy storage power supply stably, avoiding the situation that the operation of the energy storage power supply fails due to the start of the first component, and improving 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 will briefly introduce the drawings required for use in the description of the embodiments of the present application or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other related drawings can be obtained based on these drawings.

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

[0046] Figure 2 Schematic diagram of a start-up control circuit in an embodiment;

[0047] Figure 3 Schematic diagram of a voltage conversion module in an embodiment;

[0048] Figure 4 Schematic diagram of a second control module in an embodiment;

[0049] Figure 5Schematic diagram of another startup control circuit in an embodiment;

[0050] Figure 6 Schematic diagram of the startup process of the second component in an embodiment;

[0051] Figure 7 Schematic diagram of a first control module in an embodiment;

[0052] Figure 8 Schematic diagram of another first control module in an embodiment;

[0053] Figure 9 Schematic diagram of another startup control circuit in an embodiment;

[0054] Figure 10 Schematic diagram of another startup control circuit in an embodiment;

[0055] Figure 11 Schematic diagram of an energy storage device in an embodiment. Detailed implementation manners

[0056] In order to make the objectives, technical solutions and advantages of this application clearer, 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 used to limit this application.

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

[0058] Among them, the feedback winding 12V_P can supply power to the fan, the low-voltage side switching tube driver, the display screen, and the control chip in the energy storage power supply. The secondary winding 12V_S can supply power to the relay in the inverter circuit, the high-voltage side switching tube driver, and the CT. Specifically, the display screen and the control chip can be powered by the feedback winding 12V_P after being converted to 5 volts (V) voltage through a buck module. Exemplarily, the power of the fan is about 3 watts (W); the power of the low-voltage side switching tube driver is about 1W; the power of the display screen and the control chip is about 1W; the power of the relay in the inverter circuit is about 3W; the power of the CT is about 1W; the power of the high-voltage side switching tube driver is about 1W.

[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 successively go through the following three working processes: Working process A, the low-voltage side switching tube driver, the high-voltage side switching tube driver, the CT, the display screen, and the control chip start to work; Working process B, the relay in the inverter circuit closes and works; Working process C: After the charging or discharging power of the energy storage power supply is stable, the fan starts to work.

[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 is relatively balanced with the power of the secondary winding 12V_S. 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 larger than the power of the feedback winding 12V_P. Then the secondary voltage of the secondary winding 12V_S will drop, and may even drop below the minimum closing voltage of the relay, resulting in the failure of the relay in the inverter circuit to close, and causing the charging or discharging of the energy storage power supply to fail.

[0062] It can be seen that due to the cross regulation rate of the flyback circuit, if the energy coupling between the feedback winding and the secondary winding is unbalanced, resulting in the drop of the secondary voltage, the operation of the energy storage power supply fails, affecting the reliability of the energy storage power supply. Based on this, the present application provides a starting control circuit for an energy storage power supply, and the starting control circuit will be introduced in detail below.

[0063] Figure 2 It is a schematic diagram of a starting control circuit in an embodiment, as 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 powers the first component. Therefore, the startup of the first component causes the secondary voltage to drop. The feedback voltage corresponding to the feedback winding 101 powers the second component. Therefore, the startup of the second component causes the feedback voltage to drop. Moreover, the startup time of the first component is earlier than that of the second component. Exemplarily, the first component includes but is not limited to the relay in the above inverter circuit. The second component includes but is not limited to the above 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. Among them, 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. Among them, the first control signal is used to control the startup or stop of the first component.

[0066] Optionally, the first control signal includes a first level or a second level. When the first control signal is the first level, the first control signal is used to control the first component to stop working. When the first control signal is the second level, the first control signal is used to control the first component to start. The first level and the second level can be set according to requirements. Exemplarily, the first level can be a low level, and the second level can be a high level.

[0067] Optionally, the first control module 201 can be in a first state when receiving the first level and in a second state when receiving the second level. The first state and the second state are two different states. For example, the first state is a cut-off state, and the second state is a conducting state.

[0068] Further optionally, the first control module 201 may include at least one switching element. After receiving the first control signal, the state of the first control module 201 is controlled by the switching element in the first control module 201. Among them, 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). Exemplarily, 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 the second control signal of the second element, 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. Among them, the second control signal is used to control the second element 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 the third level, the second control signal is used to control the second element to stop working. When the second control signal is the fourth level, the second control signal is used to control the second element to start. The third level and the fourth level can be set according to requirements. Exemplarily, the third level may be a low level, and the fourth level may be a high level.

[0071] Optionally, the second control module 202 may be in a third state when receiving the third level and in a fourth state when receiving the 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 may 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 state of the second control module 202 is controlled by the switching element in the second control module 202, and the state of the first control module 201 is controlled 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. The control element includes, but is not limited to, a Central Processing Unit (CPU), a Digital Signal Processing (DSP), a Field-Programmable Gate Array (FPGA), or other programmable logic devices.

[0075] Further, the voltage conversion module 203 is configured 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 a preset difference, and supply power to the second element through the feedback voltage and supply power to 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 requirements. 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 difference between the power of the feedback winding 101 and the power of the secondary winding 102 is not large, that is, the energy coupling between the feedback winding 101 and the secondary winding 102 is balanced, and in this case, the energy storage power supply operates relatively stably.

[0077] Exemplarily, the voltage conversion module may control the conversion efficiency corresponding to the first state of the first control module to be greater than the conversion efficiency corresponding to the second state of the first control module.

[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 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, and the first control signal is used to control the startup or stop of the first component, and the second control module 202 is configured to receive a second control signal of the second component 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, and the second control signal is used to control the startup or stop of the second component, and the startup time of the first component is earlier than that of the second component, therefore, as the first component and the second component start up, the states of the first control module 201 and the second control module 202 will change accordingly. Further, since the voltage conversion module 203 is configured 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 a preset difference. In this way, when the power balance between the feedback winding 101 and the secondary winding 102 is achieved, the second component can be powered by the feedback voltage, and the first component can be powered by the secondary voltage of the secondary winding 102, so as to start the energy storage power supply stably, avoid the situation that the operation of the energy storage power supply fails due to the startup of the first component, and improve the reliability of the energy storage power supply.

[0079] Figure 3 Schematic diagram of a voltage conversion module in an embodiment, as Figure 3 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] Moreover, the conversion efficiency of the second conversion unit 2032 is less than that of the first conversion unit 2031. That is to say, the ratio of the output power to the input power of the second conversion unit 2032 is less than the ratio of the output power to the input power of the first conversion unit 2031.

[0081] Optionally, the first conversion unit 2031 includes, but is not limited to, a buck converter circuit, a linear voltage regulator module, a traditional transformer, a load device with a small resistance value, etc. The second conversion unit 2032 includes, but is not limited to, a low dropout regulator (LDO), a direct current - direct current (DC - DC) conversion module, a load device with a high resistance value. The DC - DC conversion module can be an LLC, a buck converter, a boost converter, a buck - boost converter, a forward converter, or a push - pull converter. Taking the first conversion unit 2031 as a buck circuit and the second conversion unit 2032 as an LDO as an example, the conversion efficiency of the buck circuit is about 96%, and the conversion efficiency of the LDO is about 50%.

[0082] Further, 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 conduct, so as to convert the feedback voltage into a preset voltage through the first path; and be in a second state when the first control signal is at a second level for controlling the first element to start, and when in the second state, control the second path between the feedback winding 101 and the second conversion unit 2032 to conduct, so as to convert the feedback voltage into a 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, and converts the feedback voltage into a 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, and converts the feedback voltage into a preset voltage through the second conversion unit 2032.

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

[0085] In the above embodiments, the voltage conversion module 203 includes a first conversion unit 2031 and a second conversion unit 2032. The first conversion unit 2031 and the second conversion unit 2032 are respectively connected to the feedback winding 101. The conversion efficiency of the second conversion unit 2032 is less 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 component to stop working, and in the first state, control the first path between the feedback winding 101 and the first conversion unit 2031 to conduct, so as to convert the feedback voltage into a preset voltage through the first path; and be in a second state when the first control signal is at a second level for controlling the first component to start, and in the second state, control the second path between the feedback winding 101 and the second conversion unit 2032 to conduct, so as to convert the feedback voltage into a preset voltage through the second path. Therefore, when the start of the first component causes the secondary side voltage to drop, resulting in the power of the secondary side winding 102 being much greater than that of the feedback winding 101, that is, the feedback winding 101 is lightly loaded and the secondary side winding 102 is heavily loaded, the second conversion unit 2032 with low conversion efficiency can increase the load of the feedback winding 101, balance the power between the feedback winding 101 and the secondary side winding 102, avoid the situation of the energy storage power supply failing to operate due to the start of the first component, and improve the reliability of the energy storage power supply.

[0086] Figure 4 Schematic diagram of a second control module in an embodiment, as Figure 4 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. Among them, 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.

[0087] Furthermore, the first control unit 2021 is configured to output a disconnection signal to the first switch unit 2022 when the second control signal is at a third level for controlling the second component to stop working, and output a conduction signal to the first switch unit 2022 when the second control signal is at a fourth level for controlling the second component 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 a cut-off state after receiving the third level to output a disconnection signal to the first switch unit 2022; the switching element in the first control unit 2021 is in a conduction state after receiving the fourth level to output a conduction signal to the first switch unit 2022.

[0089] Among them, the disconnection signal is used to disconnect the control path between the first switch unit 2022 and the first control module 201. The conduction signal is used to conduct the control path between the first switch unit 2022 and the first control module 201. Further, when the first switch unit 2022 receives the disconnection signal, the control path between the first switch unit 2022 and the first control module 201 will be disconnected. In this case, the second control module 202 will not affect the state of the first control module 201, and the state of the first control module 201 only follows the first control signal. When the first switch unit 2022 receives the conduction signal, the control path will be conducted. In this case, the second control module 202 can control the first control module 201 and control the first control module 201 to be in the first state through 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 the disconnection signal, the switch element in the first switch unit 2022 is in the cut-off state, so that the control path is disconnected. After the first switch unit 2022 receives the conduction signal, the switch element in the first switch unit 2022 is in the conduction state, so that the control path is conducted.

[0091] In the above embodiment, the second control module 202 includes a first control unit 2021 and a first switch unit 2022 connected to each other. Since 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. Since the first control unit 2021 is used to output a disconnection signal to the first switch unit 2022 when the second control signal is the third level for controlling the second element to stop working, and output a conduction signal to the first switch unit 2022 when the second control signal is the fourth level for controlling the second element to start, 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 when receiving the disconnection signal, and conduct the control path when receiving the conduction signal, so as to control the first control module 201 to be in the first state through the control path.

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

[0093] Further, when the second control signal is at the third level, the switching sub-unit 2021a will be in the cut-off state, and when the second control signal is at the fourth level, the switching sub-unit 2021a will be in the conducting state. Exemplarily, the switching sub-unit 2021a can be a triode.

[0094] Furthermore, after the switching sub-unit 2021a is in the conducting state, the operational amplifier sub-unit 2021b will charge the charging sub-unit 2021c through the feedback voltage of the feedback winding 101. Among them, the operational amplifier sub-unit 2021b can include at least one operational amplifier. The charging sub-unit 2021c can include at least one energy storage element, and the energy storage element includes but is not limited to a battery or a capacitor.

[0095] Furthermore, during the charging process of the charging sub-unit 2021c, the voltage across the charging sub-unit 2021c, that is, the charging voltage of the charging sub-unit 2021c, will increase. When the charging voltage of the charging sub-unit 2021c is greater than the preset charging threshold, the first switching unit 2022 can be controlled to be in the conducting state through the charging voltage. Among them, the preset charging threshold can be set according to actual needs, and this embodiment does not limit it.

[0096] Optionally, the first switching unit 2022 can include at least one switching element connected to the charging sub-unit 2021c. In this way, after the charging voltage of the charging sub-unit 2021c is greater than the preset charging threshold, the switching element in the first switching unit 2022 can be used to control the first switching unit 2022 to be in the conducting state.

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

[0098] Figure 5 Schematic diagram of another startup control circuit in an embodiment, as Figure 5 shown. In an exemplary embodiment, optionally, the switch sub-unit 2021a includes a first transistor Q3 and a second transistor Q4.

[0099] Wherein, 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 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 sub-unit 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 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. Therefore, the state of the second control module 202 can be accurately and efficiently controlled through 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, 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.

[0103] As Figure 5 shown. Taking the charging sub-unit 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 a cut-off state, so that the second transistor Q4 is also in a cut-off state, the output terminal of the operational amplifier U1A outputs a low level, and the third transistor Q5 will also be in a cut-off state.

[0104] When the second control signal FAN_PWM is at a high level, the first transistor Q3 is in the conducting state, causing the second transistor Q4 to also be in the conducting state. The feedback voltage of 12V_P is input to the non-inverting input terminal of the operational amplifier U1A through the second transistor Q4, causing the output voltage of the operational amplifier U1A to charge the capacitor C6.

[0105] Figure 6 It is a schematic diagram of the startup process of the second component in an embodiment. Figure 6 In FIG. (a) therein, the variation of the second control signal FAN_PWM with time is shown. Figure 6 In the horizontal axis of FIG. (a) therein 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. As Figure 6 shown in FIG. (a) therein, during the soft start process of the second component, the duty cycle of the second control signal FAN_PWM gradually increases. Figure 6 In FIG. (b) therein, the variation of the voltage of the capacitor C6 with time is shown. Figure 6 In the horizontal axis of FIG. (b) therein represents time, and the vertical axis represents the voltage of the capacitor C6. As Figure 6 shown in FIG. (b) therein, during the soft start process of the second component, the voltage of the capacitor C6 also gradually increases. When the voltage across the capacitor C6 is greater than the conduction voltage of the third transistor Q5, the third transistor Q5 is in the conducting state.

[0106] In the above embodiment, the first switch unit 2022 includes the 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, therefore, the state of the first control module 201 can be controlled according to the state of the second control module 202.

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

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

[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 a cut-off state when receiving the first level, and the switching element in the relay control unit 2011 is in a conducting state when receiving the second level.

[0110] Furthermore, the relay switching unit 2012 controls the first path to conduct when receiving the first switching signal, and controls the second path to conduct when receiving the 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 conducts the first path after receiving the first switching signal, and the switching element in the relay switching unit 2012 conducts the second path after receiving the second switching signal. Further optionally, the relay switching unit 2012 controls the first path to conduct when the relay control unit 2011 is in a cut-off state, and controls the second path to conduct when the relay control unit 2011 is in a conducting 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. Since the relay control unit 2011 can receive the first control signal, output the first switching signal to the relay switching unit 2012 when the first control signal is the first level, and output the second switching signal to the relay switching unit 2012 when the first control signal is the second level, therefore, the relay switching unit 2012 can efficiently control the first path to conduct when receiving the first switching signal, and control the second path to conduct when receiving the second switching signal.

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

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

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

[0115] That is to say, the first sub-unit 2011a is in a cut-off state when receiving the first level and in a conducting state when receiving the second level. The second sub-unit 2011b can follow the state of the first sub-unit 2011a. Further, when the second sub-unit 2011b is cut off, it outputs a first switching signal to the relay switching unit 2012, and when the second sub-unit 2011b is conducting, it outputs a second switching signal to the relay switching unit 2012. Exemplarily, both the first sub-unit 2011a and the second sub-unit 2011b can be triodes.

[0116] In the above embodiment, the relay control unit 2011 includes a first sub-unit 2011a and a second sub-unit 2011b connected to each other. The first sub-unit 2011a receives the first control signal, and the second sub-unit 2011b is connected to the relay switching unit 2012, the first sub-unit 2011a. Since the first sub-unit 2011a can be in a cut-off state when the first control signal is at a first level and control the second sub-unit 2011b to be in a cut-off state, so that the second sub-unit 2011b outputs a first switching signal to the relay switching unit 2012, and when the first control signal is at a second level, it is in a conducting state and controls the second sub-unit 2011b to be in a conducting state, so that the second sub-unit 2011b outputs a second switching signal to the relay switching unit 2012. Therefore, through the cooperation of the first sub-unit 2011a and the second sub-unit 2011b, corresponding first switching signal or second switching signal can be output based on the first control signal, so as to switch to the second conversion unit 2032 for voltage conversion in time when the flyback circuit 100 meets the switching conditions.

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

[0118] Wherein, the base of the fourth transistor Q6 is used to receive a 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 through 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 an off state, so that the fifth transistor Q7 is also in an off state. In this case, the first sub-unit 2011a outputs a first switching signal to the second sub-unit 2011b.

[0121] If the first control signal RLY_Drv is at a high level, the fourth transistor Q6 is in a conducting state, so that the fifth transistor Q7 is also in a conducting state. In this case, the first sub-unit 2011a outputs a second switching signal to the second sub-unit 2011b.

[0122] In the above embodiment, the first sub-unit 2011a includes a fourth transistor Q6, and the second sub-unit 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 through the relay switching unit 2012, and the collector of the fifth transistor Q7 is grounded. Therefore, the relay control unit 2011 can accurately output a first switching signal to the relay switching unit 2012 when the first control signal is at a first level, and output a 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 (i.e., Figure 5 the pin 3 shown in Figure 5 ), a second contact (i.e., Figure 4Pin 5 shown in

[0124] wherein, the first end of the coil (i.e., Figure 5 Pin 1 shown in Figure 5 is connected to the feedback winding 101, and the second end of the coil (i.e.,

[0125] Pin 2 shown in

[0126] 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;

[0127] Further, the relay switching unit 2012 is configured to, when receiving the first switching signal, control the feedback winding 101 to stop powering the coil, and connect the first contact and the second contact to conduct the first path, so that the first conversion unit 2031 operates.

[0128] Figure 8 is a schematic diagram of another first control module in an embodiment, as 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. Among them, the second switch unit 2013 is respectively connected to the third switch unit 2014 and the fourth switch unit 2015. The third switch unit 2014 is respectively connected to the feedback winding 101 and the first conversion unit 2031. The fourth switch unit 2015 is respectively connected to the feedback winding 101 and the second conversion unit 2032. 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 a first control signal, be in a cut-off state when the first control signal is at a first level, and be in a conducting state when the first control signal is at a second level.

[0130] The third switch unit 2014 is configured to be in a conducting state when the second switch unit 2013 is in a cut-off state, control the first path to conduct, and be in a cut-off state when the second switch unit 2013 is in a conducting state, and control the first path to disconnect.

[0131] The fourth switch unit 2015 is configured to be in a cut-off state when the second switch unit 2013 is in a cut-off state, control the second path to disconnect, and be in a conducting state when the second switch unit 2013 is in a conducting state, and control the second path to conduct.

[0132] In this way, the states of the third switch unit 2014 and the fourth switch unit 2015 can be controlled by the state of the second switch unit 2013, so that the third switch unit 2014 is in a conducting state when the second switch unit 2013 is in a cut-off state, and controls the first path to conduct, and is in a cut-off state when the second switch unit 2013 is in a conducting state, and controls the first path to disconnect. And the fourth switch unit 2015 is in a cut-off state when the second switch unit 2013 is in a cut-off state, and controls the second path to disconnect, and is in a conducting state when the second switch unit 2013 is in a conducting state, and controls the second path to conduct. In this way, the switching between the first conversion unit 2031 and the second conversion unit 2032 can also be achieved.

[0133] Figure 9 It is a schematic diagram of another start control circuit in an embodiment. As Figure 9 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] Among them, 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 respectively connected to the base of the seventh transistor Q9 and the base of the eighth transistor Q10.

[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] 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.

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

[0138] Figure 9 Taking the first unidirectional conduction unit including diode D3 and the second unidirectional conduction unit including diode D4 as an example, as Figure 9 shown, the positive pole of the first unidirectional conduction unit, that is, the positive pole of diode D3, is connected to the base of the seventh transistor Q9, and the negative pole of the first unidirectional conduction unit, that is, the negative pole of diode D3, is connected to the drain of the sixth transistor Q8. The positive pole of the second unidirectional conduction unit, that is, the positive pole of diode D4, is connected to the base of the eighth transistor Q10, and the negative pole of the second unidirectional conduction unit, that is, the negative pole of 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 a cut-off state, so that the eighth transistor Q10 is in a cut-off state and the seventh transistor Q9 is in a conducting state to pull the enable (EN) pin of the first conversion unit 2031 to the ground. At this time, the first path is conducting and the second path is disconnected.

[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 conducting.

[0141] In the above embodiments, the second switching unit 2013 includes a sixth transistor Q8, the third switching unit 2014 includes a seventh transistor Q9, and the fourth switching 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 both the seventh transistor Q9 and the eighth transistor Q10; 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. Therefore, by means of the sixth transistor Q8, the seventh transistor Q9, and the eighth transistor Q10, the first conversion unit 2031 and the second conversion unit 2032 can be efficiently switched according to the first control signal. Further, since the first control module 201 further 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, 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 means of the first unidirectional conduction unit and the second unidirectional conduction unit.

[0142] Figure 10 Schematic diagram of another starting control circuit in an embodiment, as Figure 10 shown. In an exemplary embodiment, optionally, the first control module 201 further includes a fifth switching unit, and the fifth switching unit includes a ninth transistor Q11.

[0143] Wherein, 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 cut-off state, the eighth transistor Q10 is in the cut-off state, the seventh transistor Q9 is in the conducting state, and the ninth transistor Q11 will also be in the conducting state, the first path is conducting, and the second path is disconnected.

[0145] If the first control signal RLY_Drv is at a high level, the sixth transistor Q8 is in the conducting state, the seventh transistor Q9 is in the cut-off state, the eighth transistor Q10 is in the conducting state, and the ninth transistor Q11 will also be in the cut-off state, the first path is disconnected, and the second path is conducting.

[0146] In the above embodiments, the first control module 201 further includes a fifth switch unit, and the fifth switch unit 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, therefore, the conduction of the first path or the second path can also be reliably controlled through the ninth transistor Q11.

[0147] In an exemplary embodiment, optionally, the conduction time of the first element is later than the conduction time of the second control module 202. Optionally, taking the first element as a relay in the inverter circuit as an example, the closing time of the relay in the inverter circuit needs to be later than the conduction time of the relay control unit 2011 or the first switch unit 2022. In this way, it can be ensured that the first element is controlled to start after switching to the second conversion unit 2032 for operation, 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 respectively connected to the drain of the first transistor Q3 and the feedback winding 101. (4) Resistor R10. Resistor R10 is respectively connected to the emitter of the second transistor Q4 and the feedback winding 101. (5) Resistor R11. Resistor R11 is respectively connected to the collector of the second transistor Q4 and the non-inverting input terminal of the operational amplifier sub-unit 2021b. (6) Resistor R12. Resistor R12 is respectively connected to the output terminal of the operational amplifier sub-unit 2021b and the gate of the third transistor Q5. (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 respectively connected to the feedback winding 101 and the base of the fifth transistor Q7. (11) Resistor R17. Resistor R17 is respectively connected to the emitter of the fifth transistor Q7 and the second end of the coil. (12) Resistor R18. Resistor R18 is respectively connected to the collector of the fourth transistor Q6 and the base of the fifth transistor Q7. (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 respectively connected to the base of the seventh transistor Q9 and the base of the eighth transistor Q10. (17) Resistor R23. Resistor R23 is respectively connected to the input terminal and the enable terminal of the first conversion unit 2031. (18) Resistor R24. Resistor R24 is respectively connected to the base of the eighth transistor Q10 and the drain of the sixth transistor Q8. (19) Resistor R25. Resistor R25 is respectively connected to the feedback winding 101 and the base of the seventh transistor Q9. (20) Resistor R26. Resistor R26 is respectively connected to the feedback winding 101 and the positive electrode of the diode D3. (21) Resistor R27. Resistor R27 is respectively connected to the feedback winding 101 and the base of the ninth transistor Q11. (22) Capacitor C4. The first end of capacitor C4 is connected to the output terminal of the second conversion unit 2032, and the second end of capacitor C4 is grounded. (23) Capacitor C5.The first terminal of capacitor C5 is connected to the feedback winding 101, and the second terminal of capacitor C5 is grounded.

[0150] By means of at least one of the above-mentioned 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 will be described in conjunction with the working process of the energy storage power supply.

[0152] Please refer to Figure 5 , in working process A, the fan is not started, the second control signal FAN_PWM signal is at a low level, the first transistor Q3 is in a cut-off state, the base and emitter of the second transistor Q4 are at the same potential, and the second transistor Q4 is also in a cut-off state. The output terminal of the operational amplifier U1A outputs a low level, so the third transistor Q5 is also in a cut-off state. Moreover, the relay in the inverter circuit is not started, the first control signal RLY_Drv is at a low level, the fourth transistor Q6 is in a cut-off state, making the base and emitter of the fifth transistor Q7 at the same potential, and the fifth transistor Q7 is also in a cut-off state. There is no current path in the coil of the relay RLY1, and the relay RLY1 does not work. The relay RLY1 keeps the connection between pin 3 and pin 4, the first path is conducted, and the feedback voltage of the feedback winding 12V_P is converted into a preset voltage of 5V through the first conversion unit 2031. At this time, the power of the feedback winding 12V_P is relatively balanced with the power of the secondary winding 12V_S, and the secondary voltage changes little, without affecting the normal operation.

[0153] During the working process B, the fan has not started yet, the second control signal FAN_PWM signal is at a low level, and the first transistor Q3, the second transistor Q4, and the third transistor Q5 are all in the cut-off state. However, the relay in the inverter circuit needs to be started, the first control signal RLY_Drv is at a high level, the fourth transistor Q6 is in the conducting state, the resistors R16 and R18 divide the feedback voltage of the feedback winding 12V_P, making the base potential of the fifth transistor Q7 lower than the emitter potential, and the fifth transistor Q7 is also in the conducting state. The coil of the relay RLY1 forms a current loop under the power supply of the feedback winding 12V_P, and the relay RLY1 works. The relay RLY1 switches from connecting the 3rd pin to the 4th pin to connecting the 3rd pin to the 5th pin, and the second path is conducted. The feedback voltage of the feedback winding 12V_P is converted into a preset voltage of 5V by the second conversion unit 2032. If the working power of the relay RLY1 is 1.5W, the power of the feedback winding 12V_P on the display screen and the control chip is about 2.5W, the total power of the feedback winding 12V_P is 5W, the total power of the secondary winding 12V_S is 2W, and the power of the feedback winding 12V_P is much larger than the power of the secondary winding 12V_S. The voltage of the secondary winding 12V_S will rise, which does not affect the normal operation. It should be noted that in order to improve the reliability, the withstand voltage value of the device powered by the voltage of the secondary winding 12V_S should be greater than the voltage after the voltage of the secondary winding 12V_S rises.

[0154] Moreover, the first control signal RLY_Drv is the signal for controlling the suction of the relay in the inverter circuit and the signal for controlling the conduction of the fourth transistor Q6. Since it takes a certain amount of time for the relay RLY1 to switch, in order to prevent the relay in the inverter circuit from being suctioned before the relay RLY1 has completed the switch, resulting in a voltage drop of the secondary winding 12V_S and thus the failure of the suction of the relay in the inverter circuit, therefore, the suction time of the relay in the inverter circuit controlled by the first control signal RLY_Drv needs to be delayed from the conduction time of the fourth transistor Q6.

[0155] After the delay, the relay in the inverter circuit is suctioned. 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 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] During the working process C, the fan needs to start. The second control signal FAN_PWM is at a high level. The first transistor Q3 is in the conducting state. The base of the second transistor Q4 is at a low level, and the second transistor Q4 is also in the conducting state. The feedback voltage of 12V_P is input to the non-inverting input terminal 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 composed of the resistor R12 and the capacitor C6. During the soft start of the fan, 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 conduction voltage of the third transistor Q5, the third transistor Q5 is in the conducting state, pulling the base of the fourth transistor Q6 or the gate of the sixth transistor Q8 to the ground, making the fourth transistor Q6 or the sixth transistor Q8 in the cut-off state. Further, the first path is conducted, and the feedback voltage of the feedback winding 12V_P is converted into a preset voltage of 5V through 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 operates normally.

[0157] Further, the relay of the inverter circuit completes the pulling-in, the energy storage power supply operates normally, and the voltage of the secondary winding 12V_S, that is, the secondary voltage, returns to the original voltage.

[0158] Please refer to Figure 9 , similar to the control principle of Figure 5 , during the working process A, the second control signal FAN_PWM is at a low level. The first transistor Q3, the second transistor Q4, and the third transistor Q5 are all in the cut-off state. The first control signal RLY_Drv is at a low level, and the sixth transistor Q8 is in the cut-off state, making the base and emitter of the sixth transistor Q8 equipotential, and the eighth transistor Q10 is in the cut-off state. And, at this time, the base of the seventh transistor Q9 is at a high level, and the seventh transistor Q9 is in the conducting state, pulling the enable EN pin of the first conversion unit 2031 to the ground, and the first path is conducted.

[0159] During the working process B, the second control signal FAN_PWM is at a low level. The first transistor Q3, the second transistor Q4, and the third transistor Q5 are all in the cut-off state. The first control signal RLY_Drv is at a high level, the sixth transistor Q8 is conducting, 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 conducting state. The base of the seventh transistor Q9 is at a low level, and the seventh transistor Q9 is in the cut-off state. The enable pin of the first conversion unit 2031 is at a high level, and the second path is conducted, and the second conversion unit 2032 works.

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

[0161] Please refer to Figure 10 , similar to Figure 9 the control principle of, in the working process A, the second control signal FAN_PWM signal is at a low level, and the first transistor Q3, the second transistor Q4, and the third transistor Q5 are all in the cut-off state. The first control signal RLY_Drv is at a low level, and the sixth transistor Q8 is in the cut-off state, making the base and emitter of the eighth transistor Q10 at the same potential, and the eighth transistor Q10 is in the cut-off state. Also, 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, thereby pulling up the base potential of the ninth transistor Q11, making the ninth transistor Q11 also in the on state, and the first path is turned on.

[0162] In the working process B, the second control signal FAN_PWM signal is at a low level, and the first transistor Q3, the second transistor Q4, and the third transistor Q5 are all in the cut-off state. The first control signal RLY_Drv is at a high level, and 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, while the base of the ninth transistor Q11 is at a low level, and the ninth transistor Q11 is in the cut-off state, so that the ninth transistor Q11 is also in the cut-off state, and the second path is turned on.

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

[0164] Thus, when operating under no load or just starting to charge and discharge, the display screen and the control chip are powered by a preset voltage converted by the 12V_P voltage through the first conversion unit 2031 to operate with low power consumption and reduce battery power consumption. When the relay of the inverter circuit needs to be pulled in, it is powered by a preset voltage converted by the second conversion unit 2032. In this way, the working power of the relay RLY1 and the conversion loss of the second conversion unit 2032 are used to increase the load on the feedback winding 12V_P, thereby raising the voltage of the secondary winding 12V_S. When the relay of the inverter circuit is pulled in, there is enough energy on the feedback winding 12V_P to prevent the voltage of the secondary winding 12V_S from dropping below the minimum pull-in voltage of the relay, so as to complete the pull-in and ensure the normal operation of the energy storage power supply. When the charging or discharging power increases and the fan starts to rotate and work, it is switched back to the first conversion unit 2031 to operate with low power consumption, reduce battery power consumption, and increase the operating duration of the energy storage power supply.

[0165] It can be seen that the start control circuit of this embodiment only switches the voltage conversion module when the relay of the inverter circuit needs to be pulled in, so as to increase the load on the feedback winding 12V_P to ensure that the relay of the inverter circuit is pulled in and guarantee the normal operation of the energy storage power supply. The rest of the time, it operates with low power consumption. Moreover, no additional control signal is required, and it can be multiplexed by referring to the control signal of the relevant flyback circuit.

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

[0167] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing 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 methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present 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), magnetoresistive 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 be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, artificial intelligence (AI) processors, etc., without limitation.

[0168] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope recorded in the present application.

[0169] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to 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 of the first component and determine the state of the first control module according to the first control signal; The first control signal is used to control the first component to start or stop working; The second control module is configured to receive a second control signal of the second component, determine the state of the second control module according to the second control signal, and control the 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 component to start or stop working, and the startup time of the first component is earlier than the startup time of the second component; The voltage conversion module is configured 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 supply power to the second component through the feedback voltage, and supply power to the first component through the secondary voltage of the secondary winding to start the energy storage power supply.

2. The startup control circuit according to claim 1, wherein The voltage conversion module includes a first conversion unit and a second conversion unit, and 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 less 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 a first level for controlling the first component to stop working, and in the first state, control a first path between the feedback winding and the first conversion unit to be turned on, so as to convert the feedback voltage into the preset voltage through the first path; and be in a second state when the first control signal is a second level for controlling the first component to start, and in the second state, control a second path between the feedback winding and the second conversion unit to be turned on, so as to convert the feedback voltage into the preset voltage through the second path.

3. The startup control circuit according to claim 2, wherein The second control module includes a first control unit and a first switch unit connected to each other; the first control unit is configured 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 disconnection signal to the first switch unit when the second control signal is a third level for controlling the second component to stop working, and output a conduction signal to the first switch unit when the second control signal is a fourth level for controlling the second component to start; The first switch unit is configured to disconnect the control path between the first switch unit and the first control module when receiving the disconnection signal, and to connect the control path when receiving the conduction signal, so as to control the first control module to be in the first state through the control path.

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

5. The startup control circuit according to claim 4, wherein The switch sub-unit includes a first transistor and a second transistor; the gate of the first transistor is configured 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 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, wherein 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 2-6, 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 terminal 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, and 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 conduct when receiving the first switching signal, and to control the second path to conduct when receiving the second switching signal.

8. The startup control circuit according to claim 7, wherein The relay control unit includes a first sub-unit and a second sub-unit connected to each other; the first sub-unit is configured to receive the first control signal, and the second sub-unit is connected to the relay switching unit; The first sub-unit is used to be in a cut-off state when the first control signal is at the first level, and control the second sub-unit to be in a cut-off state, so that the second sub-unit outputs the first switching signal to the relay switching unit, and be in a conducting state when the first control signal is at the second level, and control the second sub-unit to be in a conducting state, so that the second sub-unit outputs the second switching signal to the relay switching unit.

9. The startup control circuit according to claim 8, wherein The first sub-unit includes a fourth transistor, and the second sub-unit 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, wherein 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 used to, when receiving the first switching signal, control the feedback winding to stop powering the coil, and connect the first contact and the second contact to conduct the first path; and when receiving the second switching signal, control the feedback winding to power the coil, and connect the first contact and the third contact to switch to the conduction of the second path.

11. The startup control circuit according to any one of claims 2-6, 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 respectively connected to the third switch unit and the fourth switch unit, the third switch unit is respectively connected to the feedback winding and the first conversion unit, and the fourth switch unit is respectively connected to the feedback winding and the second conversion unit; The second switch unit is used to receive the first control signal, be in a cut-off state when the first control signal is at the first level, and be in a conducting state when the first control signal is at the second level; The third switch unit is used to be in a conducting state when the second switch unit is in a cut-off state, and control the first path to conduct, and be in a cut-off state when the second switch unit is in a conducting state, and control the first path to be disconnected; The fourth switch unit is used to be in a cut-off state when the second switch unit is in a cut-off state, and control the second path to be disconnected, and be in a conducting state when the second switch unit is in a conducting state, and control the second path to conduct.

12. The startup control circuit according to claim 11, wherein The second switching unit includes a sixth transistor, the third switching unit includes a seventh transistor, and the fourth switching unit includes an eighth transistor; The gate of the sixth transistor is configured 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 further connected to the feedback winding; The emitter of the eighth transistor is connected to the feedback winding, and the 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 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, and the negative electrode of the first unidirectional conduction unit is connected to the drain of the sixth transistor; The positive electrode of the second unidirectional conduction unit is connected to the base of the eighth transistor, and the negative electrode of the second unidirectional conduction 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 switching unit, and the fifth switching 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 the startup control circuit according to any one of claims 1-14.

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