Autonomous power-up over-discharge protection circuit and spacecraft

Abstract

The utility model discloses an autonomous power-up over-discharge protection circuit and a spacecraft. According to the autonomous power-up over-discharge protection circuit, a switch module is connected with an energy storage module, a first comparison module and a second comparison module, the first comparison module is further connected with a protection reference source and a first enabling module, and the second comparison module is further connected with a recovery reference source and a second enabling module. The first enabling module and the second enabling module are both connected to the autonomous power-up circuit; the switch module is used for controlling the opening and closing of the autonomous power-up over-discharge protection circuit; the first comparison module is used for enabling the first enabling module according to the voltage of the energy storage module so as to control the closing of the autonomous power-up circuit; and the second comparison module is used for enabling the second enabling module according to the voltage of the energy storage module so as to control the opening of the autonomous power-up circuit. According to the autonomous power-up over-discharge protection circuit provided by the embodiment of the utility model, the discharge of the energy storage module is controlled through the voltage of the energy storage module, and the service life of a spacecraft can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of aerospace technology, and in particular to an autonomous power-on over-discharge protection circuit and a spacecraft. Background Technology

[0002] The main function of the spacecraft's battery pack is to supplement the power supply to other electrical equipment on the spacecraft when the output power of the spacecraft's main energy solar array cannot meet the spacecraft's power requirements, or when it is in the Earth's shadow area.

[0003] However, during the operation of a spacecraft in orbit, abnormal situations may cause the battery pack to continuously discharge. The battery pack is at risk of being over-discharged and damaged under prolonged discharge, which also leads to a shorter lifespan of the spacecraft. Utility Model Content

[0004] This invention provides an autonomous power-on over-discharge protection circuit and spacecraft to improve the service life of spacecraft.

[0005] According to one aspect of this utility model, an autonomous power-on over-discharge protection circuit is provided. The spacecraft includes an autonomous power-on circuit and an energy storage module. The autonomous power-on circuit controls the discharge of the energy storage module. The autonomous power-on over-discharge protection circuit includes: a switching module, a first comparison module, a second comparison module, a first enable module, and a second enable module.

[0006] The switching module is connected to the energy storage module. The switching module is also connected to the first input terminal of the first comparison module and the first input terminal of the second comparison module. The second input terminal of the first comparison module is connected to the protection reference source. The output terminal of the first comparison module is connected to the first enable module. The second input terminal of the second comparison module is connected to the recovery reference source. The output terminal of the second comparison module is connected to the second enable module. Both the first enable module and the second enable module are connected to the autonomous power-on circuit.

[0007] The switching module is used to control the opening or closing of the autonomous power-on over-discharge protection circuit; the first comparison module is used to control the opening or closing of the first enabling module according to the voltage of the energy storage module; the second comparison module is used to control the opening or closing of the second enabling module according to the voltage of the energy storage module; the first enabling module is used to control the closing of the autonomous power-on circuit; the second enabling module is used to control the opening of the autonomous power-on circuit.

[0008] Optionally, the first comparison module includes: a first comparator, a first resistor, a second resistor, a third resistor, a first diode, and a second diode;

[0009] The inverting input of the first comparator is connected to the switching module, the non-inverting input of the first comparator is connected to the protection reference source, the power supply terminal of the first comparator is connected to the power supply voltage, the ground terminal of the first comparator is grounded, the first end of the first resistor is connected to the power supply voltage, the second end of the first resistor is connected to the non-inverting input of the first comparator, the first end of the second resistor is connected to the power supply voltage, the second end of the second resistor is connected to the first end of the third resistor, the second end of the third resistor is grounded, the anode of the first diode is connected to the second end of the second resistor, the cathode of the first diode is connected to the output terminal of the first comparator, the anode of the second diode is connected to the anode of the first diode, and the cathode of the second diode is connected to the first enable module.

[0010] Optionally, the first enabling module includes: a first switching transistor and a second switching transistor;

[0011] The input terminal of the first switching transistor is connected to the autonomous power-on circuit, the output terminal of the first switching transistor is connected to the input terminal of the second switching transistor, the output terminal of the second switching transistor is grounded, and the control terminals of the first and second switching transistors are both connected to the first comparison module.

[0012] Optionally, the second comparison module includes: a second comparator, a third diode, a fourth resistor, a fifth resistor, and a fourth diode;

[0013] The non-inverting input of the second comparator is connected to the switching module, the inverting input of the second comparator is connected to the recovery reference source, the power supply terminal of the second comparator is connected to the power supply voltage, the ground terminal of the second comparator is grounded, the output terminal of the second comparator is connected to the cathode of the third diode, the first terminal of the fourth resistor is connected to the power supply voltage, the anode of the third diode is connected to the second terminal of the fourth resistor, the first terminal of the fifth resistor is connected to the second terminal of the fourth resistor, the second terminal of the fifth resistor is grounded, the anode of the fourth diode is connected to the second terminal of the fourth resistor, and the cathode of the fourth diode is connected to the second enable module.

[0014] Optionally, the second enabling module includes: a third switch and a fourth switch;

[0015] The input terminal of the third switch is connected to the autonomous power-on circuit, the output terminal of the third switch is connected to the input terminal of the fourth switch, the output terminal of the fourth switch is grounded, and the control terminals of the third and fourth switches are both connected to the second comparison module.

[0016] Optionally, the switching module includes: a first power-on protection relay and a second power-on protection relay;

[0017] Both the first power-on protection relay and the second power-on protection relay are connected to the energy storage module. The first power-on protection relay is also connected to the first comparison module, and the second power-on protection relay is also connected to the second comparison module.

[0018] According to another aspect of the present invention, a spacecraft is also provided, the spacecraft comprising: a photovoltaic module, an energy storage module, an autonomous power-on circuit, and an autonomous power-on over-discharge protection circuit as described in any of the above embodiments;

[0019] The photovoltaic module is connected to the energy storage module, and the energy storage module is also connected to the autonomous power-on circuit and the autonomous power-on over-discharge protection circuit, respectively. The autonomous power-on circuit is also connected to the autonomous power-on over-discharge protection circuit.

[0020] The photovoltaic module is used to charge the energy storage module; the energy storage module is used to store energy; the autonomous power-on circuit is used to control the discharge of the energy storage module; the autonomous power-on over-discharge protection circuit is used to prevent the energy storage module from being over-discharged.

[0021] Optionally, the autonomous power-on circuit includes: a power-on relay, a first limit switch, a second limit switch, and a discharge switch transistor;

[0022] The input terminal of the power-on relay is connected to the positive terminal of the energy storage module. The output terminal of the power-on relay is connected to the first terminal of the first limit switch. The second terminal of the first limit switch is connected to the negative terminal of the energy storage module. The first terminal of the second limit switch is connected to the first terminal of the first limit switch. The second terminal of the second limit switch is connected to the second terminal of the first limit switch. The input terminal of the discharge switch is connected to the positive terminal of the energy storage module. The output terminal of the discharge switch is connected to the load. The control terminal of the discharge switch is connected to the input terminal of the power-on relay. The on enable input terminal and the off enable input terminal of the power-on relay are both connected to the command power supply. The off enable output terminal of the power-on relay is connected to the first enable module of the autonomous power-on over-discharge protection circuit. The on enable output terminal of the power-on relay is connected to the second enable module of the autonomous power-on over-discharge protection circuit.

[0023] Optionally, the photovoltaic module includes: a solar array and a protection diode; the solar array is connected to the energy storage module through the protection diode.

[0024] In this embodiment of the invention, when the switching module is turned on, the discharge of the energy storage module is controlled by a first comparison module and a second comparison module. The first comparison module enables the first enabling module when the voltage of the energy storage module is less than the voltage of the protection reference source, so that the first enabling module controls the autonomous power-on circuit to close. The second comparison module enables the second enabling module when the voltage of the energy storage module is greater than the voltage of the recovery reference source, so that the second enabling module controls the autonomous power-on circuit to open. This achieves over-discharge protection and recovery of the energy storage module, which is beneficial to improving the service life of the spacecraft.

[0025] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of an autonomous power-on over-discharge protection circuit provided in an embodiment of this utility model;

[0028] Figure 2 This is a schematic diagram of another autonomous power-on over-discharge protection circuit provided in an embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of another autonomous power-on over-discharge protection circuit provided in this embodiment of the utility model;

[0030] Figure 4 This is a schematic diagram of another autonomous power-on over-discharge protection circuit provided in this embodiment of the utility model;

[0031] Figure 5 This is a schematic diagram of another autonomous power-on over-discharge protection circuit provided in this embodiment of the utility model;

[0032] Figure 6 This is a schematic diagram of another autonomous power-on over-discharge protection circuit provided in this embodiment of the utility model;

[0033] Figure 7 This is a schematic diagram of another autonomous power-on over-discharge protection circuit provided in this embodiment of the utility model;

[0034] Figure 8This is a schematic diagram of a spacecraft provided in an embodiment of the present utility model. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0037] This utility model embodiment provides an autonomous power-on over-discharge protection circuit. This circuit controls the discharge of the energy storage module through a first comparison module and a second comparison module. The first comparison module enables a first enabling module when the voltage of the energy storage module is less than the voltage of the protection reference source, causing the first enabling module to control the autonomous power-on circuit to shut down. The second comparison module enables a second enabling module when the voltage of the energy storage module is greater than the voltage of the recovery reference source, causing the second enabling module to control the autonomous power-on circuit to turn on. This achieves over-discharge protection and recovery of the energy storage module, which is beneficial for improving the service life of the spacecraft. Figure 1 This is a schematic diagram of an autonomous power-on over-discharge protection circuit provided in an embodiment of this utility model. The spacecraft includes an autonomous power-on circuit and an energy storage module, and the autonomous power-on circuit controls the discharge of the energy storage module. (Refer to...) Figure 1 The autonomous power-on over-discharge protection circuit includes: a switch module 110, a first comparison module 120, a second comparison module 130, a first enable module 140, and a second enable module 150.

[0038] The switch module 110 is connected to the energy storage module 200. The switch module 110 is also connected to the first input terminal of the first comparison module 120 and the first input terminal of the second comparison module 130. The second input terminal of the first comparison module 120 is connected to the protection reference source 10. The output terminal of the first comparison module 120 is connected to the first enable module 140. The second input terminal of the second comparison module 130 is connected to the recovery reference source 20. The output terminal of the second comparison module 130 is connected to the second enable module 150. The first enable module 140 and the second enable module 150 are both connected to the autonomous power-on circuit 300. The switching module 110 is used to control the opening or closing of the autonomous power-on over-discharge protection circuit; the first comparison module 120 is used to control the opening or closing of the first enabling module 140 according to the voltage of the energy storage module 200; the second comparison module 130 is used to control the opening or closing of the second enabling module 150 according to the voltage of the energy storage module 200; the first enabling module 140 is used to control the closing of the autonomous power-on circuit 300; and the second enabling module 150 is used to control the opening of the autonomous power-on circuit 300.

[0039] Specifically, the switch module 110 controls the opening and closing of the autonomous power-on over-discharge protection circuit. When the switch module 110 is turned on, the autonomous power-on over-discharge protection circuit is turned on; when the switch module 110 is turned off, the autonomous power-on over-discharge protection circuit is turned off. The first comparison module 120 and the second comparison module 130 of the switch module 110 are synchronously controlled, meaning that the first comparison module 120 and the second comparison module 130 are simultaneously connected to the energy storage module 200 or simultaneously disconnected from the energy storage module 200.

[0040] When the autonomous power-on over-discharge protection circuit is activated, the first comparison module 120 and the second comparison module 130 control the activation or deactivation of the autonomous power-on circuit 300 based on the voltage of the energy storage module 200.

[0041] If the voltage of the energy storage module 200 is less than the voltage of the protection reference source, the first comparator module 120 enables the first enable module 140, turning it on. The second comparator module 130 stops enabling the second enable module 150, turning it off. At this time, the first enable module 140 controls the autonomous power supply circuit 300 to shut down, and the energy storage module 200 stops outputting power, thus preventing over-discharge. If the voltage of the energy storage module 200 is greater than the voltage of the recovery reference source, the second comparator module 130 enables the second enable module 150, turning it on. The first comparator module 120 stops enabling the first enable module 140, turning it off. At this time, the second enable module 150 controls the autonomous power supply circuit 300 to turn on, and the power output of the energy storage module 200 recovers. The voltage of the protection reference source 10 is less than the voltage of the recovery reference source 20. It should be noted that the voltage of the protection reference source 10 and the voltage of the recovery reference source 20 can be set according to the actual needs of the energy storage module 200, and this embodiment does not impose any restrictions on this.

[0042] In this embodiment of the invention, when the switch module 110 is turned on, the discharge of the energy storage module 200 is controlled by the first comparison module 120 and the second comparison module 130. When the voltage of the energy storage module 200 is less than the voltage of the protection reference source 10, the first comparison module 120 enables the first enable module 140, so that the first enable module 140 controls the autonomous power-on circuit 300 to turn off. When the voltage of the energy storage module 200 is greater than the voltage of the recovery reference source 20, the second comparison module 130 enables the second enable module 150, so that the second enable module 150 controls the autonomous power-on circuit 300 to turn on, thereby realizing over-discharge protection and recovery of the energy storage module 200, which is beneficial to improving the service life of the spacecraft.

[0043] Figure 2 This is a schematic diagram of another autonomous power-on over-discharge protection circuit provided in an embodiment of this utility model. Optionally, based on the above embodiments, refer to... Figure 2 The first comparison module 120 includes: a first comparator U1, a first resistor R1, a second resistor R2, a third resistor R3, a first diode D1, and a second diode D2.

[0044] The inverting input of the first comparator U1 is connected to the switching module 110, the non-inverting input of the first comparator U1 is connected to the protection reference source 10, the power supply terminal of the first comparator U1 is connected to the power supply voltage VCC, the ground terminal of the first comparator U1 is grounded, the first end of the first resistor R1 is connected to the power supply voltage VCC, the second end of the first resistor R1 is connected to the non-inverting input of the first comparator U1, the first end of the second resistor R2 is connected to the power supply voltage VCC, the second end of the second resistor R2 is connected to the first end of the third resistor R3, the second end of the third resistor R3 is grounded, the anode of the first diode D1 is connected to the second end of the second resistor R2, the cathode of the first diode D1 is connected to the output terminal of the first comparator U1, the anode of the second diode D2 is connected to the anode of the first diode D1, and the cathode of the second diode D2 is connected to the first enable module 140.

[0045] Specifically, the energy storage module 200 has two operating modes: a discharge mode and a charging mode. The energy storage module 200 discharges in discharge mode and charges in charging mode.

[0046] When the energy storage module 200 is discharging, its voltage gradually decreases; when it is charging, its voltage gradually increases. The first comparator U1 compares the voltage of the energy storage module 200 with the voltage of the protection reference source 10. When the voltage of the energy storage module 200 is greater than or equal to the voltage of the protection reference source 10, the first comparator U1 outputs a low level, and the potential between the second resistor R2 and the third resistor R3 decreases, causing the first comparator module 120 to stop enabling the first enable module 140. When the voltage of the energy storage module 200 is less than the voltage of the protection reference source 10, the first comparator U1 outputs a high level, and the potential between the second resistor R2 and the third resistor R3 remains unchanged, allowing the first comparator module 120 to enable the first enable module 140. The first diode D1 and the second diode D2 isolate the first comparator U1 and the first enable module 140.

[0047] In this circuit, a first voltage divider resistor R6 and a second voltage divider resistor R7 can be provided between the inverting input of the first comparator U1 and the switching module 110. The first end of the first voltage divider resistor R6 is connected to the switching module 110, the second end of the first voltage divider resistor R6 is connected to the first end of the second voltage divider resistor R7, the second end of the second voltage divider resistor R7 is grounded, and the second end of the first voltage divider resistor R6 is also connected to the inverting input of the first comparator U1. The first voltage divider resistor R6 and the second voltage divider resistor R7 divide the voltage of the energy storage module 200 to reduce the voltage input to the first comparator U1.

[0048] Figure 3This is a schematic diagram of another self-powered over-discharge protection circuit provided in this embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 3 The first enabling module 140 includes: a first switch Q1 and a second switch Q2.

[0049] The input terminal of the first switch Q1 is connected to the autonomous power-on circuit 300, the output terminal of the first switch Q1 is connected to the input terminal of the second switch Q2, the output terminal of the second switch Q2 is grounded, and the control terminals of the first switch Q1 and the second switch Q2 are both connected to the first comparison module 120.

[0050] Specifically, when the first comparison module 120 enables the first enable module 140, the first switch Q1 and the second switch Q2 are turned on. At this time, the autonomous power supply circuit 300 is turned off, and the energy storage module 200 stops outputting power, thereby preventing the energy storage module 200 from being over-discharged.

[0051] Figure 4 This is a schematic diagram of another self-powered over-discharge protection circuit provided in this embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 4 The second comparison module 130 includes: a second comparator U2, a third diode D3, a fourth resistor R4, a fifth resistor R5, and a fourth diode D4.

[0052] The non-inverting input of the second comparator U2 is connected to the switching module 110, the inverting input of the second comparator U2 is connected to the recovery reference source 20, the power supply terminal of the second comparator U2 is connected to the power supply voltage VCC, the ground terminal of the second comparator U2 is grounded, the output terminal of the second comparator U2 is connected to the cathode of the third diode D3, the first terminal of the fourth resistor R4 is connected to the power supply voltage VCC, the anode of the third diode D3 is connected to the second terminal of the fourth resistor R4, the first terminal of the fifth resistor R5 is connected to the second terminal of the fourth resistor R4, the second terminal of the fifth resistor R5 is grounded, the anode of the fourth diode D4 is connected to the second terminal of the fourth resistor R4, and the cathode of the fourth diode D4 is connected to the second enable module 150.

[0053] Specifically, the energy storage module 200 has two operating modes: a discharge mode and a charging mode. The energy storage module 200 discharges in discharge mode and charges in charging mode.

[0054] When the energy storage module 200 is discharging, its voltage gradually decreases; when it is charging, its voltage gradually increases. The second comparator U2 compares the voltage of the energy storage module 200 with the voltage of the recovery reference source 20. When the voltage of the energy storage module 200 is less than or equal to the voltage of the recovery reference source 20, the second comparator U2 outputs a low level, and the potential between the fourth resistor R4 and the fifth resistor R5 decreases, causing the second comparator module 130 to stop enabling the second enable module 150. When the voltage of the energy storage module 200 is greater than the voltage of the recovery reference source 20, the second comparator U2 outputs a high level, and the potential between the fourth resistor R4 and the fifth resistor R5 remains unchanged, allowing the second comparator module 130 to enable the second enable module 150. The third diode D3 and the fourth diode D4 isolate the second comparator U2 and the second enable module 150.

[0055] A third voltage divider resistor R8 and a fourth voltage divider resistor R9 can be provided between the non-inverting input of the second comparator U2 and the switching module 110. The first end of the third voltage divider resistor R8 is connected to the switching module 110, the second end of the third voltage divider resistor R8 is connected to the first end of the fourth voltage divider resistor R9, the second end of the fourth voltage divider resistor R9 is grounded, and the second end of the third voltage divider resistor R8 is also connected to the non-inverting input of the second comparator U2. The third voltage divider resistor R8 and the fourth voltage divider resistor R9 divide the voltage of the energy storage module 200 to reduce the voltage input to the second comparator U2.

[0056] Figure 5 This is a schematic diagram of another autonomous power-on over-discharge protection circuit provided in this embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 5 The second enabling module 150 includes a third switch Q3 and a fourth switch Q4.

[0057] The input terminal of the third switch Q3 is connected to the autonomous power-on circuit 300, the output terminal of the third switch Q3 is connected to the input terminal of the fourth switch Q4, the output terminal of the fourth switch Q4 is grounded, and the control terminals of the third switch Q3 and the fourth switch Q4 are both connected to the second comparison module 130.

[0058] Specifically, when the second comparison module 130 enables the second enable module 150, the third switch Q3 and the fourth switch Q4 are turned on, at which time the autonomous power-on circuit 300 is turned on, and the power output of the energy storage module 200 is restored.

[0059] Figure 6 This is a schematic diagram of another autonomous power-on over-discharge protection circuit provided in this embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 6The switch module 110 includes: a first power-on protection relay K1 and a second power-on protection relay K2.

[0060] The first power-on protection relay K1 and the second power-on protection relay K2 are both connected to the energy storage module 200. The first power-on protection relay K1 is also connected to the first comparison module 120, and the second power-on protection relay K1 is also connected to the second comparison module 130.

[0061] The input terminal of the first power-on protection relay K1 is connected to the energy storage module 200, and the output terminal of the first power-on protection relay K1 is connected to the first comparison module 120. Both the on-enable and off-enable input terminals of the first power-on protection relay K1 are connected to the command power supply 30, and both the on-enable and off-enable output terminals of the first power-on protection relay K1 are grounded. The input terminal of the second power-on protection relay K2 is connected to the energy storage module 200, and the output terminal of the second power-on protection relay K2 is connected to the second comparison module 130. Both the on-enable and off-enable input terminals of the second power-on protection relay K2 are connected to the command power supply 30, and both the on-enable and off-enable output terminals of the second power-on protection relay K2 are grounded.

[0062] Specifically, the first power-on protection relay K1 and the second power-on protection relay K2 are synchronously turned on or off, so that the first comparison module 120 and the second comparison module 130 are simultaneously connected to the energy storage module 200 or simultaneously disconnected from the energy storage module 200.

[0063] For example, the first power-on protection relay K1 and the second power-on protection relay K2 can be dual-channel relays, each with two input terminals and two output terminals. In application, the first enable module 140 and the second enable module 150 can also be connected to the autonomous power-on circuit 300 via the first power-on protection relay K1 and the second power-on protection relay K2, respectively. Figure 7 This is a schematic diagram of another self-powered over-discharge protection circuit provided in this embodiment of the utility model. (Refer to...) Figure 7The first input terminal of the first power-on protection relay K1 is connected to the energy storage module 200, the first output terminal of the first power-on protection relay K1 is connected to the first comparison module 120, the second input terminal of the first power-on protection relay K1 is connected to the autonomous power-on circuit 300, the second output terminal of the first power-on protection relay K1 is connected to the first enable module 140, the on enable input terminal and the off enable input terminal of the first power-on protection relay K1 are both connected to the command power supply 30, and the on enable output terminal and the off enable output terminal of the first power-on protection relay K1 are both grounded. The first input terminal of the second power-on protection relay K2 is connected to the energy storage module 200, the first output terminal of the second power-on protection relay K2 is connected to the second comparison module 130, the second input terminal of the second power-on protection relay K2 is connected to the autonomous power-on circuit 300, the second output terminal of the second power-on protection relay K2 is connected to the second enable module 150, the on enable input terminal and the off enable input terminal of the second power-on protection relay K2 are both connected to the command power supply 30, and the on enable output terminal and the off enable output terminal of the second power-on protection relay K2 are both grounded.

[0064] Specifically, the connection between the first input terminal and the first output terminal of the first power-on protection relay K1, and the connection between the second input terminal and the second output terminal of the first power-on protection relay K1 are synchronously turned on or off; the connection between the first input terminal and the first output terminal of the second power-on protection relay K2, and the connection between the second input terminal and the second output terminal of the second power-on protection relay K2 are synchronously turned on or off.

[0065] This utility model embodiment also provides a spacecraft. Figure 8 This is a schematic diagram of a spacecraft provided in an embodiment of this utility model. (Refer to...) Figure 8 The spacecraft includes: a photovoltaic module 400, an energy storage module 200, an autonomous power-on circuit 300, and an autonomous power-on over-discharge protection circuit 100 provided in any of the above embodiments.

[0066] The photovoltaic module 400 is connected to the energy storage module 200. The energy storage module 200 is also connected to the autonomous power-on circuit 300 and the autonomous power-on over-discharge protection circuit 100. The autonomous power-on circuit 300 is also connected to the autonomous power-on over-discharge protection circuit 100. The photovoltaic module 400 is used to charge the energy storage module. The energy storage module 200 is used to store energy. The autonomous power-on circuit 300 is used to control the discharge of the energy storage module 200. The autonomous power-on over-discharge protection circuit 100 is used to prevent the energy storage module 200 from over-discharging.

[0067] The spacecraft provided in this embodiment has the beneficial effects of the autonomous power-on over-discharge protection circuit 100 provided in any of the above embodiments, which will not be elaborated here.

[0068] Based on the above embodiments, optionally, refer to... Figure 8 The autonomous power-on circuit 300 includes: a power-on relay K3, a first limit switch S1, a second limit switch S2, and a discharge switch Q5.

[0069] The input terminal of the power-on relay K3 is connected to the positive terminal of the energy storage module 200. The output terminal of the power-on relay K3 is connected to the first terminal of the first limit switch S1. The second terminal of the first limit switch S1 is connected to the negative terminal of the energy storage module 200. The first terminal of the second limit switch S2 is connected to the first terminal of the first limit switch S1. The second terminal of the second limit switch S2 is connected to the second terminal of the first limit switch S1. The input terminal of the discharge switch tube Q5 is connected to the positive terminal of the energy storage module 200. The output terminal of the discharge switch tube Q5 is connected to the load 1000. The control terminal of the discharge switch tube Q5 is connected to the input terminal of the power-on relay K3. The on enable input terminal and the off enable input terminal of the power-on relay K3 are both connected to the command power supply 30. The off enable output terminal of the power-on relay K3 is connected to the first enable module 140 of the autonomous power-on over-discharge protection circuit 100. The on enable output terminal of the power-on relay K3 is connected to the second enable module 150 of the autonomous power-on over-discharge protection circuit 100.

[0070] The autonomous power-on circuit 300 may also include a first power-on resistor R10, a second power-on resistor R11, and a third power-on resistor R12. The first end of the first power-on resistor R10 is connected to the energy storage module 200, the second end of the first power-on resistor R10 is connected to the first end of the second power-on resistor R11, the second end of the second power-on resistor R11 is connected to the power-on relay K3, the first end of the third power-on resistor R12 is connected to the second end of the first power-on resistor R10, and the second end of the third power-on resistor R12 is connected to the control terminal of the discharge switch transistor Q5.

[0071] Based on the above embodiments, optionally, refer to... Figure 8 The photovoltaic module 400 includes a solar panel 410 and a protection diode D5; the solar panel 410 is connected to the energy storage module 200 through the protection diode D5.

[0072] The anode of the protection diode D5 is connected to the solar panel 410, and the cathode of the protection diode D5 is connected to the energy storage module 200.

[0073] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0074] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An autonomous power-on over-discharge protection circuit, characterized in that, The spacecraft includes an autonomous power supply circuit and an energy storage module, wherein the autonomous power supply circuit controls the discharge of the energy storage module; The autonomous power-on over-discharge protection circuit includes: a switching module, a first comparison module, a second comparison module, a first enable module, and a second enable module; The switching module is connected to the energy storage module. The switching module is also connected to the first input terminal of the first comparison module and the first input terminal of the second comparison module. The second input terminal of the first comparison module is connected to the protection reference source. The output terminal of the first comparison module is connected to the first enable module. The second input terminal of the second comparison module is connected to the recovery reference source. The output terminal of the second comparison module is connected to the second enable module. Both the first enable module and the second enable module are connected to the autonomous power-on circuit. The switching module is used to control the opening or closing of the autonomous power-on over-discharge protection circuit; the first comparison module is used to control the opening or closing of the first enabling module according to the voltage of the energy storage module; the second comparison module is used to control the opening or closing of the second enabling module according to the voltage of the energy storage module; the first enabling module is used to control the closing of the autonomous power-on circuit; the second enabling module is used to control the opening of the autonomous power-on circuit.

2. The autonomous power-on over-discharge protection circuit according to claim 1, characterized in that, The first comparison module includes: a first comparator, a first resistor, a second resistor, a third resistor, a first diode, and a second diode; The inverting input of the first comparator is connected to the switching module, the non-inverting input of the first comparator is connected to the protection reference source, the power supply terminal of the first comparator is connected to the power supply voltage, the ground terminal of the first comparator is grounded, the first end of the first resistor is connected to the power supply voltage, the second end of the first resistor is connected to the non-inverting input of the first comparator, the first end of the second resistor is connected to the power supply voltage, the second end of the second resistor is connected to the first end of the third resistor, the second end of the third resistor is grounded, the anode of the first diode is connected to the second end of the second resistor, the cathode of the first diode is connected to the output terminal of the first comparator, the anode of the second diode is connected to the anode of the first diode, and the cathode of the second diode is connected to the first enable module.

3. The autonomous power-on over-discharge protection circuit according to claim 1, characterized in that, The first enabling module includes: a first switching transistor and a second switching transistor; The input terminal of the first switch is connected to the autonomous power-on circuit, the output terminal of the first switch is connected to the input terminal of the second switch, the output terminal of the second switch is grounded, and the control terminals of the first and second switches are both connected to the first comparison module.

4. The autonomous power-on over-discharge protection circuit according to claim 1, characterized in that, The second comparison module includes: a second comparator, a third diode, a fourth resistor, a fifth resistor, and a fourth diode; The non-inverting input of the second comparator is connected to the switching module, the inverting input of the second comparator is connected to the recovery reference source, the power supply terminal of the second comparator is connected to the power supply voltage, the ground terminal of the second comparator is grounded, the output terminal of the second comparator is connected to the cathode of the third diode, the first terminal of the fourth resistor is connected to the power supply voltage, the anode of the third diode is connected to the second terminal of the fourth resistor, the first terminal of the fifth resistor is connected to the second terminal of the fourth resistor, the second terminal of the fifth resistor is grounded, the anode of the fourth diode is connected to the second terminal of the fourth resistor, and the cathode of the fourth diode is connected to the second enable module.

5. The autonomous power-on over-discharge protection circuit according to claim 1, characterized in that, The second enabling module includes: a third switch and a fourth switch; The input terminal of the third switch is connected to the autonomous power-on circuit, the output terminal of the third switch is connected to the input terminal of the fourth switch, the output terminal of the fourth switch is grounded, and the control terminals of both the third and fourth switches are connected to the second comparison module.

6. The autonomous power-on over-discharge protection circuit according to any one of claims 1-5, characterized in that, The switching module includes: a first power-on protection relay and a second power-on protection relay; Both the first power-on protection relay and the second power-on protection relay are connected to the energy storage module. The first power-on protection relay is also connected to the first comparison module, and the second power-on protection relay is also connected to the second comparison module.

7. A spacecraft, characterized in that, include: Photovoltaic module, energy storage module, autonomous power-on circuit, and autonomous power-on over-discharge protection circuit as described in any one of claims 1-6; The photovoltaic module is connected to the energy storage module, and the energy storage module is also connected to the autonomous power-on circuit and the autonomous power-on over-discharge protection circuit. The autonomous power-on circuit is also connected to the autonomous power-on over-discharge protection circuit. The photovoltaic module is used to charge the energy storage module; the energy storage module is used to store energy; the autonomous power-on circuit is used to control the discharge of the energy storage module; the autonomous power-on over-discharge protection circuit is used to prevent the energy storage module from being over-discharged.

8. The spacecraft according to claim 7, characterized in that, The autonomous power-on circuit includes: a power-on relay, a first limit switch, a second limit switch, and a discharge switch transistor; The input terminal of the power-on relay is connected to the positive terminal of the energy storage module. The output terminal of the power-on relay is connected to the first terminal of the first limit switch. The second terminal of the first limit switch is connected to the negative terminal of the energy storage module. The first terminal of the second limit switch is connected to the first terminal of the first limit switch. The second terminal of the second limit switch is connected to the second terminal of the first limit switch. The input terminal of the discharge switch is connected to the positive terminal of the energy storage module. The output terminal of the discharge switch is connected to the load. The control terminal of the discharge switch is connected to the input terminal of the power-on relay. The on enable input terminal and the off enable input terminal of the power-on relay are both connected to the command power supply. The off enable output terminal of the power-on relay is connected to the first enable module of the autonomous power-on over-discharge protection circuit. The on enable output terminal of the power-on relay is connected to the second enable module of the autonomous power-on over-discharge protection circuit.

9. The spacecraft according to claim 8, characterized in that, The photovoltaic module includes a solar array and a protection diode; the solar array is connected to the energy storage module through the protection diode.

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