Redundant power supply device and electronic equipment
By introducing energy storage devices and diagnostic modules into the redundant power supply circuit, the oversupply of power supply performance and single-point failure of non-sustaining output loads is solved, low-cost, high-safe power supply is achieved, and functional safety standards are met.
Patent Information
- Application Number
- CN202422186945.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-05
AI Technical Summary
In the prior art, conventional redundant power supply circuits with non-continuous output loads have problems such as excessive performance and the inability to avoid single point failure, especially in the case of high functional safety levels, which cannot meet the requirements of the ISO26262 standard.
Multi-channel redundant power supply circuits are adopted, including energy storage devices and switch switching devices, combined with energy storage energy diagnosis module and voltage diagnosis module, by detecting the storage energy and output voltage of the energy storage device, ensuring normal power supply and avoiding single-point failure.
It effectively avoids single point failure, reduces circuit costs, meets high-level functional safety requirements, and reduces the power requirements of power supply circuits.
Smart Images
Figure CN223218875U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electronic circuits, and in particular to a redundant power supply device and electronic equipment. Background Art
[0002] As safety requirements for electronic devices continue to rise, so too are functional safety levels. According to the ISO 26262 functional safety standard, when functional safety reaches high levels such as ASIL C or ASIL D, single points of failure (where a single component failure could cause the entire function to fail) must be avoided. A common approach is to implement redundancy, including in the power supply circuit.
[0003] Pulse type non-continuous output load is a type of non-continuous output load. This type of non-continuous output load driver only needs to have the ability to output for a period of time, and does not need to output continuously for a long time. However, when the load to be driven has non-continuous output load characteristics such as pulse type, such as Figure 1 As shown, the conventional redundant power supply circuit uses a redundant power supply circuit with continuous output capability, and its output power needs to meet the load startup power. The power supply power is large, and the redundant power supply circuit has a certain performance surplus, resulting in waste, and single point failure cannot be avoided, such as low power supply voltage, abnormal or disconnected power supply voltage of a certain line, etc.
[0004] Currently, no effective solution has been proposed to the problem of excessive power supply performance and unavoidable single point failure of conventional redundant circuits for non-continuous output driving loads in related technologies. Utility Model Content
[0005] Based on this, it is necessary to provide a redundant power supply device and electronic equipment to address the above technical problems.
[0006] In a first aspect, an embodiment of the present application provides a redundant power supply device, comprising:
[0007] Power supply circuit;
[0008] Multiple redundant power supply circuits connected to the power supply circuit, each redundant power supply circuit including an energy storage device and a switch device, one end of the energy storage device being connected to the power supply circuit, the other end of the energy storage device being connected to one end of the switch device, and the other end of the switch device being connected to a non-continuous output load;
[0009] An energy storage diagnostic module, connected to the input end of each redundant power supply circuit, for detecting the stored energy of the energy storage device;
[0010] The voltage diagnosis module is connected to the output end of each redundant power supply circuit and is used to detect the output voltage of each redundant power supply circuit to determine whether the power supply is normal.
[0011] In one embodiment, each redundant power supply circuit further includes a first reverse polarity diode and a second reverse polarity diode.
[0012] The anode of the first reverse polarity diode is connected to the output end of the power supply circuit, and the cathode of the first reverse polarity diode is connected to one end of the energy storage device and one end of the switch device;
[0013] The anode of the second reverse polarity diode is connected to the other end of the switch device, and the cathode of the second reverse polarity diode is connected to the discontinuous output load.
[0014] In one embodiment, the redundant power supply device further includes a current limiting resistor, one end of the current limiting resistor is connected to the output end of the power supply circuit, and the other end of the current limiting resistor is connected to the input end of each redundant power supply circuit.
[0015] In one embodiment, the redundant power supply device further includes an alarm module, which is connected to the energy storage diagnostic module and the voltage diagnostic module, and is configured to alarm when the stored energy of the energy storage device does not meet the load trigger energy requirement or when the output voltage of each redundant power supply circuit is abnormal.
[0016] In one embodiment, the switch device includes but is not limited to a relay, a MOSFET tube, and an insulated gate bipolar transistor.
[0017] In one embodiment, the energy storage energy diagnosis module is a first resistor voltage-dividing sampling circuit, and the resistor voltage-dividing sampling circuit includes a first resistor and a second resistor, and the first resistor and the second resistor are connected.
[0018] In one embodiment, the voltage diagnosis module is a second resistor voltage-dividing sampling circuit, and the resistor voltage-dividing sampling circuit includes a third resistor and a fourth resistor, and the third resistor is connected to the fourth resistor.
[0019] In one embodiment, the energy storage device is an energy storage capacitor, the positive electrode of the energy storage capacitor is connected to the power supply circuit, and the negative electrode of the energy storage capacitor is connected to the common ground.
[0020] In a second aspect, an embodiment of the present application further provides a redundant power supply device, comprising:
[0021] Power supply circuit;
[0022] a switch switching circuit connected to the power supply circuit, wherein the other end of the switch switching circuit is connected to a non-continuous output load;
[0023] Multiple redundant power supply circuits connected to the power supply circuit, each redundant power supply circuit including an energy storage device and a switch device, one end of the energy storage device being connected to the power supply circuit, the other end of the energy storage device being connected to one end of the switch device, and the other end of the switch device being connected to the non-continuous output load;
[0024] An energy storage diagnostic module, connected to the input end of each redundant power supply circuit, for detecting the stored energy of the energy storage device;
[0025] The voltage diagnosis module is connected to the output ends of the switch switching circuit and each redundant power supply circuit, and is used to detect the voltage output by the switch switching circuit and each redundant power supply circuit to determine whether the power supply is normal.
[0026] In a third aspect, an embodiment of the present application further provides an electronic device, comprising the redundant power supply device as described in the first aspect or the second aspect above.
[0027] The redundant power supply device provided by the present invention includes a power supply circuit, a multi-channel redundant power supply circuit connected to the power supply circuit, each redundant power supply circuit includes an energy storage device and a switch switching device, one end of the energy storage device is connected to the power supply circuit, the other end of the energy storage device is connected to one end of the switch switching device, and the other end of the switch switching device is connected to a non-continuous output load; an energy storage energy diagnostic module is connected to the input end of each redundant power supply circuit, and is used to detect the stored energy of the energy storage device; a voltage diagnostic module is connected to the output end of each redundant power supply circuit, and is used to detect the voltage output by each redundant power supply circuit to determine whether the power supply is normal, thereby solving the problems of excessive power supply performance and unavoidable single point failure of conventional redundant circuits for non-continuous output driving loads, reducing circuit costs, effectively avoiding single point failures, and meeting functional safety requirements.
[0028] The details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0030] Figure 1 It is a circuit block diagram of a redundant power supply circuit in the prior art;
[0031] Figure 2 is a circuit block diagram of a redundant power supply device in one embodiment;
[0032] Figure 3 is a circuit block diagram of a redundant power supply device in one embodiment;
[0033] Figure 4 is a circuit block diagram of a redundant power supply device in one embodiment;
[0034] Figure 5 is a circuit diagram of a redundant power supply device in an embodiment. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.
[0036] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.
[0037] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. In this application, when an element is referred to as "provided on" another element, it can be directly provided on the other element or there can also be a central element. When an element is considered to be "provided on" another element, it can be directly provided on the other element or there can also be a central element. When an element is considered to be "fixed on" another element, it can be directly fixed on the other element or there can also be a central element. The terms "first", "second", "third" and the like involved in this application are merely to distinguish similar objects and do not represent a specific ordering of objects. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0038] See also Figure 2The present invention provides a redundant power supply device, including a power supply circuit 10, a multi-channel redundant power supply circuit 20, an energy storage diagnostic module 30, and a voltage diagnostic module 40. The power supply circuit 10 is connected to the mains for providing electrical energy, and the multi-channel redundant power supply circuit 20 is connected to the power supply circuit 10. Each redundant power supply circuit includes an energy storage device 201 and a switch device 202. One end of the energy storage device 201 is connected to the power supply circuit 10, and the other end of the energy storage device 201 is connected to one end of the switch device 202. The other end of the switch device 202 is connected to a non-continuous output load. The energy storage diagnostic module 30 is connected to the input end of each redundant power supply circuit for detecting the stored energy of the energy storage device 201 in each redundant power supply circuit. The voltage diagnostic module 40 is connected to the output end of each redundant power supply circuit for detecting the voltage output by each redundant power supply circuit to determine whether the power supply is normal.
[0039] For non-continuous output loads such as pulse-type loads, whose drive only needs to meet transient energy output, this application uses redundant energy storage devices to replace redundant power supply circuits. In total, only one power supply circuit is required, and the load triggering energy is stored and provided by the redundant energy storage devices. Compared with redundant power supplies, the cost of energy storage devices is low; at the same time, power supply voltage diagnosis and energy storage device storage energy diagnosis are added to effectively avoid single point failures and meet functional safety requirements. During the power-on initialization process, by switching the switch switching devices 202 in each redundant power supply circuit in turn, the output voltage is diagnosed using the voltage diagnosis module 40 on the output side to determine whether the power supply of each redundant power supply circuit is normal. Among them, the switch switching device can be a relay, a MOSFET tube, an insulated gate bipolar transistor (IGBT), etc. To ensure that the energy stored in the energy storage device 201 meets the load triggering energy requirement, the energy stored in the energy storage device 201 is diagnosed through the energy storage energy diagnostic module 30. The redundant power supply device provided by the utility model solves the problems of excessive power supply performance and unavoidable single point failure of conventional redundant circuits for non-continuous output driving loads, reduces circuit costs, and by increasing redundancy and related diagnosis, the hardware failure rate will also be low, meeting high-level functional safety requirements.
[0040] In one embodiment, Figure 3 As shown, each redundant power supply circuit also includes a first reverse polarity diode and a second reverse polarity diode, wherein the anode of the first reverse polarity diode is connected to the output end of the power supply circuit, and the cathode of the first reverse polarity diode is connected to one end of the energy storage device and one end of the switch switching device; the anode of the second reverse polarity diode is connected to the other end of the switch switching device, and the cathode of the second reverse polarity diode is connected to the non-continuous output load.
[0041] In the redundant power supply device of this embodiment, the reverse polarity diode mainly plays an isolation role to prevent the influence of a redundant power supply circuit on another redundant power supply circuit after a fault in the redundant power supply circuit. The diode can also be other reverse polarity protection devices with the same function.
[0042] In one embodiment, see Figure 3 The redundant power supply device further includes a current limiting resistor 50, one end of the current limiting resistor 50 is connected to the output end of the power supply circuit 10, and the other end of the current limiting resistor 50 is connected to the input end of each redundant power supply circuit.
[0043] The current limiting resistor in this embodiment is mainly used to reduce the large inrush current caused by the large energy storage device when the power is turned on, and it can also reduce the power demand for the power supply. The power of the conventional power supply circuit needs to meet the load power, and the power is large. In this application, the load power is provided by the energy storage device, and the power of the power supply circuit can be reduced to reduce costs. The position of the current limiting resistor can be moved as needed, and after adding the current limiting function, if the load end is abnormal, such as causing the output current to be output for a long time, it can also prevent the output voltage of the power supply circuit from being lowered; at this time, if the power supply circuit also supplies power to other functions, it will not be affected.
[0044] In one embodiment, see Figure 3 The redundant power supply device also includes an alarm module 60, which is connected to the energy storage diagnostic module 30 and the voltage diagnostic module 40, and is used to alarm when the stored energy of the energy storage device 201 does not meet the load trigger energy requirement or when the output voltage of each redundant power supply circuit is abnormal, thereby avoiding single point failure and meeting functional safety.
[0045] In one embodiment, the energy storage device is an energy storage capacitor, the positive electrode of the energy storage capacitor is connected to the power supply circuit, and the negative electrode of the energy storage capacitor is connected to the common ground. When the energy storage device 201 used is a capacitor, according to the equation "energy stored in a capacitor = capacitance × voltage squared / 2", during the power-on initialization process, the charging rate can be determined by detecting the input side voltage rise rate (i.e., the capacitor voltage rise rate) to determine the capacitor capacitance and the energy stored in the energy storage device 201.
[0046] Furthermore, the energy storage diagnostic module 30 is a first resistor voltage-dividing sampling circuit connected to the input terminals of each redundant power supply circuit, and is used to detect the voltage inputted by each redundant power supply circuit to obtain the stored energy of the energy storage device. The resistor voltage-dividing sampling circuit includes a first resistor and a second resistor, the first resistor and the second resistor being connected.
[0047] Furthermore, the voltage diagnosis module is a second resistor voltage divider sampling circuit, which is connected to the output end of each redundant power supply circuit and is used to detect the voltage output by each redundant power supply circuit. The resistor voltage divider sampling circuit includes a third resistor and a fourth resistor, and the third resistor is connected to the fourth resistor.
[0048] Furthermore, the switch switching device includes but is not limited to a relay, a MOSFET tube, and an insulated gate bipolar transistor; through switch switching, different channel voltages are output for independent voltage diagnosis of redundant output.
[0049] The present application also provides a redundant power supply device, such as Figure 4 As shown, it includes a power supply circuit 10; a switch switching circuit 70 connected to the power supply circuit 10, the other end of the switch switching circuit 70 being connected to a non-continuous output load; multiple redundant power supply circuits 20 connected to the power supply circuit 10, each redundant power supply circuit including an energy storage device 201 and a switch switching device 202, one end of the energy storage device 201 being connected to the power supply circuit 10, the other end of the energy storage device 201 being connected to one end of the switch switching device 202, and the other end of the switch switching device 202 being connected to the non-continuous output load; an energy storage energy diagnostic module 30 being connected to the input end of each redundant power supply circuit for detecting the stored energy of the energy storage device 201 in each redundant power supply circuit; and a voltage diagnostic module 40 being connected to the output end of the switch switching circuit 70 and each redundant power supply circuit for detecting the voltage output by the switch switching circuit 70 and each redundant power supply circuit to determine whether the power supply is normal.
[0050] The redundant power supply device in the above embodiment is also a solution that uses energy storage devices to replace redundant power supply circuits, uses multiple energy storage devices to replace multiple redundant power supplies, and also includes directly supplying power to the load through a switch switching circuit 70, but its output power needs to meet the load output power requirements.
[0051] In a specific embodiment, Figure 5As shown, the power supply circuit 10 in the redundant power supply device is a DC-CD or LDO power supply circuit, the energy storage device in each redundant power supply circuit is an energy storage capacitor, the switch switching device is a MOSFET switch tube, and the switch switching circuit 70 is also a MOSFET switch tube. When the switch tube is turned on, it directly supplies power. Each redundant power supply circuit is also connected to two reverse polarity diodes. The input end of each redundant power supply circuit is also connected to a current limiting resistor R1. Even if the energy storage device is short-circuited and overcurrent occurs, due to the existence of the current limiting resistor R1, the direct power supply power of the other power supply circuit is not greatly affected. Among them, the energy storage energy diagnosis module 30 is a resistor voltage divider sampling circuit, including a first resistor R2 and a second resistor R3, and the first resistor R2 is connected to the second resistor R3. The voltage diagnosis module 40 is also a resistor voltage divider sampling circuit, including a third resistor R4 and a fourth resistor R5, and the third resistor R4 is connected to the fourth resistor R5.
[0052] An embodiment of the present application further provides an electronic device, comprising a redundant power supply device as described in any of the above embodiments, wherein the redundant power supply device provides electrical energy to the electronic device to meet the functional safety level requirements of the electronic device.
[0053] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0054] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.
Claims
1. A redundant power supply device, characterized in that: include: Power supply circuit; Multiple redundant power supply circuits connected to the power supply circuit, each redundant power supply circuit including an energy storage device and a switch device, one end of the energy storage device being connected to the power supply circuit, the other end of the energy storage device being connected to one end of the switch device, and the other end of the switch device being connected to a non-continuous output load; An energy storage diagnostic module, connected to the input end of each redundant power supply circuit, for detecting the stored energy of the energy storage device; The voltage diagnosis module is connected to the output end of each redundant power supply circuit and is used to detect the output voltage of each redundant power supply circuit to determine whether the power supply is normal.
2. The device according to claim 1, characterized in that Each redundant power supply circuit further includes a first reverse polarity diode and a second reverse polarity diode. The anode of the first reverse polarity diode is connected to the output end of the power supply circuit, and the cathode of the first reverse polarity diode is connected to one end of the energy storage device and one end of the switch device; The anode of the second reverse polarity diode is connected to the other end of the switch device, and the cathode of the second reverse polarity diode is connected to the discontinuous output load.
3. The device according to claim 2, characterized in that The redundant power supply device further includes a current limiting resistor, one end of which is connected to the output end of the power supply circuit, and the other end of which is connected to the input end of each redundant power supply circuit.
4. The device according to claim 3, characterized in that The redundant power supply device also includes an alarm module, which is connected to the energy storage diagnostic module and the voltage diagnostic module, and is used to alarm when the stored energy of the energy storage device does not meet the load trigger energy requirement or when the output voltage of each redundant power supply circuit is abnormal.
5. The device according to claim 1, characterized in that The switching devices include but are not limited to relays, MOSFET tubes, and insulated gate bipolar transistors.
6. The device according to claim 1, characterized in that The energy storage device is an energy storage capacitor, the positive electrode of the energy storage capacitor is connected to the power supply circuit, and the negative electrode of the energy storage capacitor is connected to the common ground.
7. The device according to claim 6, characterized in that The energy storage energy diagnosis module is a first resistor voltage-dividing sampling circuit, and the resistor voltage-dividing sampling circuit includes a first resistor and a second resistor, and the first resistor and the second resistor are connected.
8. The device according to claim 1, characterized in that The voltage diagnosis module is a second resistor voltage-dividing sampling circuit, and the resistor voltage-dividing sampling circuit includes a third resistor and a fourth resistor, and the third resistor is connected to the fourth resistor.
9. A redundant power supply device, characterized in that: include: Power supply circuit; a switch switching circuit connected to the power supply circuit, wherein the other end of the switch switching circuit is connected to a non-continuous output load; Multiple redundant power supply circuits connected to the power supply circuit, each redundant power supply circuit including an energy storage device and a switch device, one end of the energy storage device being connected to the power supply circuit, the other end of the energy storage device being connected to one end of the switch device, and the other end of the switch device being connected to the non-continuous output load; An energy storage diagnostic module, connected to the input end of each redundant power supply circuit, for detecting the stored energy of the energy storage device; The voltage diagnosis module is connected to the output ends of the switch switching circuit and each redundant power supply circuit, and is used to detect the voltage output by the switch switching circuit and each redundant power supply circuit to determine whether the power supply is normal.
10. An electronic device, characterized in that: The redundant power supply device comprises the redundant power supply device according to any one of claims 1 to 9.