Power supply system and electronic device

Abstract

The application discloses a power supply system and electronic equipment, the power supply system comprises: a power input end, the power input end is used for accessing commercial power; a power conversion module, the input end of the power conversion module is connected with the power input end, and the output end of the power conversion module is used for accessing a main device body through a DC bus; a plurality of main device backup battery units, the main device backup battery units are electrically connected with the DC bus; the working mode of the main device backup battery unit comprises a discharge mode and a hot backup discharge mode, at least one of the plurality of main device backup battery units works in the hot backup discharge mode; the main device backup battery unit working in the hot backup discharge mode is used for discharging to the DC bus when the voltage of the DC bus is less than a preset voltage threshold value, and outputs a discharge trigger signal; at least part of the remaining main device backup battery units works in the discharge mode when the discharge trigger signal is received; the application aims to realize seamless zero-interruption power supply for a load when AC power is interrupted.

Description

Technical Field

[0001] This invention relates to the field of power supply technology, and in particular to a power supply system and electronic equipment. Background Technology

[0002] For servers with high power loads, a single battery circuit cannot meet their power requirements. The existing solution is to use multiple battery circuits together to power servers with high power loads to meet their power requirements.

[0003] When the mains power fails, if multiple battery circuits are in charging mode, they need to be switched to discharging mode to supply power to the load. However, this switching process takes time. In cases where the server's power outage response time is short, a prolonged switching time may cause a brief server downtime. Such a brief downtime can severely impact the server, such as causing data loss or corruption, or disrupting production and affecting efficiency. Summary of the Invention

[0004] The main objective of this invention is to propose a power supply system and electronic device that aims to achieve seamless, zero-interruption power supply to the load when AC power is interrupted.

[0005] To achieve the above objectives, the present invention provides a power supply system comprising:

[0006] A power input terminal, which is used to connect to mains power; A power conversion module, wherein the input terminal of the power conversion module is connected to the power input terminal, and the output terminal of the power conversion module is used to connect to the main body of the main equipment through a DC bus; Multiple main equipment backup battery units, wherein the main equipment backup battery units are electrically connected to the DC bus; The operating modes of the main equipment backup battery unit include discharge mode and hot standby discharge mode, and at least one of the multiple main equipment backup battery units operates in hot standby discharge mode. The main equipment backup battery unit operating in hot standby discharge mode is used to discharge to the DC bus when the voltage of the DC bus is less than a preset voltage threshold, and outputs a discharge trigger signal. At least a portion of the remaining main equipment backup battery units operate in discharge mode upon receiving the discharge trigger signal.

[0007] In one embodiment, one of the plurality of main device backup battery units is a master unit, and the remaining main device backup battery units are slave units; the operating modes of the main device backup battery units include hot standby discharge mode, discharge mode, charging mode, and standby mode. When the backup battery unit of the main device is the host in the hot standby discharge mode, the host is used to discharge when the voltage of the DC bus is less than a preset voltage threshold and output the discharge trigger signal to control at least some of the slave devices that are operating in charging mode / standby mode to switch to the discharge mode. When the backup battery unit of the master device is a slave device operating in hot standby discharge mode, the slave device discharges to the DC bus when the voltage of the DC bus is less than a preset voltage threshold, and outputs a discharge trigger signal to the master device, so that the master device controls at least some of the remaining slave devices to operate in discharge mode when the discharge trigger signal is received.

[0008] In one embodiment, the host is used to obtain the remaining power of multiple main device backup battery units, and when the remaining power of the main device backup battery units is greater than a first preset power threshold, control the main device backup battery units to operate in hot standby discharge mode until the number of main device backup battery units in hot standby discharge mode reaches a preset number. The host is also used to control the main device backup battery unit to operate in charging mode when the remaining power of the main device backup battery unit is less than or equal to a first preset power threshold.

[0009] In one embodiment, the host is further configured to acquire the power consumption of the main device body, and adjust the number of main device backup battery units operating in hot standby discharge mode and the number of main device backup battery units receiving the discharge trigger signal according to the power consumption of the main device body.

[0010] In one embodiment, the main equipment backup battery unit includes: The battery circuit and the battery management system are respectively electrically connected to the DC bus and the battery management system; the battery management systems of the multiple main equipment backup battery units are interconnected.

[0011] In one embodiment, the main equipment backup battery unit further includes: A voltage conversion circuit, wherein the first terminal of the voltage conversion circuit is connected to the DC bus, the second terminal of the voltage conversion circuit is connected to the battery circuit, and the controlled terminal of the voltage conversion circuit is electrically connected to the battery management system.

[0012] In one embodiment, the main equipment backup battery unit further includes: Capacitor circuit; The voltage conversion circuit includes a unidirectional voltage conversion module and a bidirectional voltage conversion module. The unidirectional voltage conversion module is connected to the DC bus and the battery circuit, respectively, and the bidirectional voltage conversion module is connected to the DC bus and the capacitor circuit, respectively.

[0013] In one embodiment, the battery management system is further configured to acquire the power of the main device body, and control the capacitor circuit to discharge to the DC bus when the power of the main device body is greater than or equal to a first preset power threshold. The battery management system is also used to control the capacitor circuit to charge from the DC bus when the power of the main device body is less than a second preset power threshold. Wherein, the first preset power threshold is greater than the second preset power threshold.

[0014] In one embodiment, the battery management system is further configured to execute a first timing when the power of the main device body is greater than or equal to a first preset power threshold; and to stop the first timing when the power of the main device body is less than the first preset power threshold. The battery management system is also used to control the battery circuit to discharge to the DC bus when the duration of the first timing is longer than the first preset duration.

[0015] The present invention also proposes an electronic device, including a main device body and a power system as described in any of the above claims; the main device body is electrically connected to the power system.

[0016] When the mains power fails, the DC bus voltage drops instantaneously, triggering the main equipment backup battery unit in hot standby discharge mode to respond immediately and inject DC power into the DC bus without delay. This provides emergency power support to the main equipment at the first moment of power failure, effectively preventing it from entering abnormal states such as reset, shutdown, or data loss due to power interruption. At the same time, the main equipment backup battery unit in hot standby discharge mode synchronously outputs a discharge trigger signal to other parallel main equipment backup battery units. Upon receiving this signal, at least some of the remaining main equipment backup battery units quickly switch from charging / standby mode to discharge mode, working together to replenish current to the DC bus and jointly meet the continuous high-power power supply requirements of the main equipment.

[0017] Compared to existing technologies, this invention achieves seamless, zero-interruption power supply to the main equipment when the mains power is interrupted through a two-level power supply mechanism of "instantaneous response of hot standby unit + coordinated discharge of multiple modules," preventing the main equipment from unexpected shutdown, service interruption, or system restart due to power outage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a circuit structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the circuit structure of another embodiment of the present invention; Figure 3 This is a schematic diagram of the circuit structure of another embodiment of the present invention.

[0020] Explanation of icon numbers: 10. Power conversion module; 20. Main equipment body; 30. Main equipment backup battery unit; 31. Battery management system; 32. Battery circuit; 33. Voltage conversion circuit; 331. Unidirectional voltage conversion module; 332. Bidirectional voltage conversion module; 34. Capacitor circuit.

[0021] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] For servers with high power loads, a single battery circuit cannot meet their power requirements. The existing solution is to use multiple battery circuits together to power servers with high power loads to meet their power requirements.

[0026] When the mains power fails, if multiple battery circuits are in charging mode, they need to be switched to discharging mode to supply power to the load. However, this switching process takes time. In cases where the server's power outage response time is short, a prolonged switching time may cause a brief server downtime. Such a brief downtime can severely impact the server, such as causing data loss or corruption, or disrupting production and affecting efficiency.

[0027] To address the aforementioned technical problems, this invention proposes a power supply system. In one embodiment of this invention, referring to... Figure 1 The power supply system includes: A power input terminal, which is used to connect to mains power; A power conversion module 10, the input terminal of which is connected to the power input terminal, and the output terminal of which is used to connect to the main equipment body 20 through a DC bus; Multiple main equipment backup battery units 30, wherein the main equipment backup battery units 30 are electrically connected to the DC bus; The operating modes of the main equipment backup battery unit 30 include a discharge mode and a hot standby discharge mode, and at least one of the multiple main equipment backup battery units 30 operates in the hot standby discharge mode. The main equipment backup battery unit 30, which operates in hot standby discharge mode, is used to discharge to the DC bus when the voltage at the power input terminal is less than a preset voltage threshold, and outputs a discharge trigger signal. At least a portion of the remaining main equipment backup battery units 30 operate in discharge mode when the discharge trigger signal is received.

[0028] In this embodiment, the main device body 20 is a component used to provide computing, storage, communication and other functions, such as a smart computing server (AI training / inference server), a core switch of a small data center, storage devices, industrial controllers or embedded systems and other computing devices.

[0029] In this embodiment, the power conversion module 10 employs at least one rectifier circuit to convert AC power into DC power. In addition, the power conversion module 10 may also employ a filter circuit to smooth the rectified voltage, and a power factor correction (PFC) circuit to improve the power factor of the DC power. No restrictions are imposed here.

[0030] In this embodiment, the main equipment backup battery unit 30 may include at least a battery management unit and a battery circuit 32. The battery circuit 32 is electrically connected to the DC bus and the battery management system 31, respectively. The battery management systems 31 of the multiple main equipment backup battery units 30 are interconnected. The battery management unit is used to control the working mode of the battery circuit 32 and to control the battery circuit 32 to switch to the discharge mode when a discharge trigger signal is received.

[0031] It should be noted that when the main equipment backup battery unit 30 is in hot standby discharge mode, it is in discharge mode (i.e., the discharge path is in a standby state that can be instantaneously turned on, and the control circuit has completed pre-biasing), but its output voltage is required to be lower than the DC bus voltage. Under this condition, because the DC bus potential is higher than the output potential of the main equipment backup battery unit 30, the power switching devices in its discharge path are naturally in reverse bias cutoff or zero current maintenance state, and the main equipment backup battery unit 30 has no net current output, thereby avoiding energy loss and maintaining power reserves. When the mains power fails, the DC bus voltage drops sharply. Once the bus voltage is lower than the set discharge threshold voltage (preset voltage threshold) of the main equipment backup battery unit 30 in hot standby discharge mode, its internal fast detection and drive circuit responds immediately, turns on the discharge path, and causes the main equipment backup battery unit 30 to instantly switch from "zero output standby" to active discharge state, injecting current into the DC bus to provide millisecond-level emergency power support for the main equipment body 20. This mechanism ensures that the bus voltage remains stable immediately upon power failure, effectively preventing serious anomalies such as host resetting, crashing, loss of cached data, or file system corruption caused by power interruption, and truly achieving seamless and zero-interruption power switching.

[0032] In practical applications, when the mains power is interrupted, the DC bus voltage drops instantaneously, triggering the main equipment backup battery unit 30 in hot standby discharge mode to respond immediately and inject DC power into the DC bus without delay. This provides emergency power support to the main equipment 20 at the first moment of mains power failure, effectively preventing it from entering abnormal states such as reset, shutdown, or data loss due to power interruption. At the same time, the main equipment backup battery unit 30 in hot standby discharge mode synchronously outputs a discharge trigger signal to other parallel main equipment backup battery units 30. Upon receiving this signal, at least some of the remaining main equipment backup battery units 30 quickly switch from charging / standby mode to discharge mode, working together to replenish current to the DC bus and jointly meet the continuous high-power power supply requirements of the main equipment 20.

[0033] With this configuration, compared to existing technologies, the present invention achieves seamless zero-interruption power supply to the main equipment body 20 when the mains power is interrupted through a two-level power supply mechanism of "instantaneous response of hot standby unit + coordinated discharge of multiple modules", thus preventing the main equipment body 20 from unexpected shutdown, service interruption or system restart due to power interruption.

[0034] In one embodiment of the present invention, one of the plurality of main device backup battery units 30 is a master device, and the remaining main device backup battery units 30 are slave devices; the operating modes of the main device backup battery units 30 include hot standby discharge mode, discharge mode, charging mode and standby mode.

[0035] It should be noted that when the main equipment backup battery unit 30 is in charging mode, it stores electrical energy from the DC bus for charging. When the main equipment backup battery unit 30 is in standby mode, it remains in standby mode. The master unit controls the slave unit to switch between charging mode, discharging mode, standby mode, or hot standby discharging mode.

[0036] When the main device backup battery unit 30, which is operating in hot standby discharge mode, is the host, the host is used to discharge when the voltage of the DC bus is less than a preset voltage threshold, and outputs the discharge trigger signal to control at least some of the slave devices operating in charging mode / standby mode to switch to the discharge mode. When the backup battery unit 30 of the master device is the slave device in hot standby discharge mode, the slave device discharges to the DC bus when the voltage of the DC bus is less than a preset voltage threshold, and outputs a discharge trigger signal to the master device, so that the master device controls at least some of the remaining slave devices to operate in discharge mode when the discharge trigger signal is received.

[0037] With this configuration, the battery cell operating in hot standby discharge mode, whether configured as a master or slave, has the function of automatically starting to discharge and outputting electrical energy to the DC bus when the DC bus voltage is detected to be lower than a preset voltage threshold, and simultaneously generating and outputting a discharge trigger signal; the discharge trigger signal is used to trigger at least some of the other battery cells in charging mode or standby mode to switch to discharge mode in response.

[0038] Although the main equipment backup battery unit 30 in hot standby discharge mode does not output active power to the DC bus, there is still a significant static energy consumption due to factors such as continuous operation of its internal control circuit, minor leakage current in the power devices, battery self-discharge, and periodic self-test operations. This causes its remaining charge to slowly decrease over time. Moreover, the discharge of the main equipment backup battery unit 30 during mains power outages also consumes its charge.

[0039] The energy storage portion of the backup battery unit 30 for the main equipment typically uses lithium-ion batteries. Because the terminal voltage of lithium-ion batteries drops significantly and their internal resistance increases markedly when they are under low charge, their maximum output discharge power decreases accordingly. If the remaining charge of the battery unit is too low, its instantaneous discharge capacity may not be able to meet the minimum sustaining power required by the main equipment body 20, leading to DC bus voltage instability. This can cause abnormalities such as main equipment body 20 resetting, crashing, or data loss, making it impossible to achieve the technical goal of uninterrupted power supply.

[0040] In one embodiment of the present invention, the host is used to obtain the remaining power of multiple main device backup battery units 30, and when the remaining power of the main device backup battery unit 30 is greater than a first preset power threshold, the host controls the main device backup battery unit 30 to work in hot standby discharge mode until the number of main device backup battery units 30 in hot standby discharge mode reaches a preset number. The host is also used to control the main device backup battery unit 30 to operate in charging mode when the remaining power of the main device backup battery unit 30 is less than or equal to a first preset power threshold.

[0041] It should be noted that the preset quantity is the maximum number of main equipment backup battery units 30 that are allowed to work in hot standby discharge mode at the same time. It is generally set to 2 or 3, but can also be set according to the power requirements of the main equipment body 20. The first preset power threshold is the remaining power of the main equipment backup battery unit 30 to determine whether it is qualified to enter or maintain hot standby discharge mode. It can be set to 20% to 30%, or can be set according to the actual situation.

[0042] With this configuration, the host restricts the hot standby discharge mode to only main device backup battery units 30 with remaining power above a first preset power threshold. This ensures that all main device backup battery units 30 in hot standby discharge mode have sufficient usable energy, enabling them to continuously output rated current during power outages to meet the potential high-power demands of the main device 20. Furthermore, when the remaining power of a main device backup battery unit 30 is less than or equal to the first preset power threshold, the host forces it to exit hot standby discharge mode and switch to charging mode. This forms a virtuous cycle logic of "high power enters hot standby—discharge / standby power consumption—low power exits charging—fully charged and re-enters," ensuring the instantaneous effectiveness, process stability, and long-term sustainability of hot standby discharge.

[0043] When the main equipment body 20 is in a high power consumption state (such as full load operation), if the mains power is interrupted: the number of battery cells in the hot standby discharge mode is insufficient, which will result in insufficient initial response power, which will not be able to maintain the DC bus voltage stability, causing the bus voltage to drop sharply, which may trigger the undervoltage protection or reset of the main equipment body 20. If the number of battery cells that subsequently switch to discharge mode is insufficient, the continuous power supply capability will be limited, making it difficult to support the continuous operation of the main equipment 20, and there is a risk of service interruption or data loss.

[0044] When the main device 20 is in a low power consumption state, if the mains power is interrupted: if there are too many battery cells in hot standby discharge mode or discharge mode, although power supply can be guaranteed, it will lead to multiple discharge paths being connected in parallel, introducing unnecessary static power consumption and conduction loss. Conversely, if the number is too small (but still meets the minimum power supply requirements), although it can maintain normal operation, it lacks redundancy margin. Once any of the main equipment backup battery units 30 in hot standby discharge mode fails, the system will lose its emergency response capability and its reliability will decrease.

[0045] In one embodiment of the present invention, the host is further configured to acquire the power consumption of the main device body 20, and adjust the number of main device backup battery units 30 operating in hot standby discharge mode and the number of main device backup battery units 30 receiving the discharge trigger signal according to the power consumption of the main device body 20.

[0046] In this embodiment, the host can directly monitor the power supply branch of the main device 20 through a high-precision current / voltage sensing circuit and calculate the power consumption in real time. The host adjusts the number of discharge trigger signals sent by the main device backup battery unit 30 in hot standby discharge mode according to the power consumption of the main device 20, so as to control the number of main device backup battery units 30 in discharge mode when the mains power is interrupted.

[0047] It should be noted that the power consumption of the main device 20 is positively correlated with the total discharge capacity required by the system during a mains power outage. That is, the instantaneous discharge power provided by the main device backup battery unit 30 in hot standby discharge mode, and the continuous discharge power provided by the remaining main device backup battery units 30 in discharge mode, must both match the actual power consumption of the main device 20. Based on this principle, developers can set a power consumption-quantity mapping strategy according to actual conditions and store it in the host's storage module, so that the number of main device backup battery units 30 in hot standby discharge mode and in discharge mode during a mains power outage can match the power consumption of the main device 20 in real time.

[0048] With this configuration, this embodiment establishes a dynamic mapping relationship between the power consumption of the main device 20 and the resource configuration of the main device backup battery unit 30, thereby achieving on-demand elastic supply of emergency power supply capability. Under the premise of ensuring truly zero-millisecond seamless switching when the mains power is interrupted, the power supply reliability of the system is optimized simultaneously.

[0049] In one embodiment of the present invention, reference is made to... Figure 2 In the case where the main equipment backup battery unit 30 includes a battery circuit 32 and a battery management system 31, the main equipment backup battery unit 30 further includes: A voltage conversion circuit 33 is provided, with its first terminal connected to the DC bus, its second terminal connected to the battery circuit 32, and its controlled terminal electrically connected to the battery management system 31.

[0050] In this embodiment, the voltage conversion circuit 33 can be implemented using a bidirectional DC-DC converter. The battery circuit 32 is connected to the second end of the voltage conversion circuit 33. The battery management system 31 is used to control the voltage conversion circuit 33 to operate in a discharge state when the DC bus undervoltage is detected, so as to convert the wide voltage range of the battery circuit 32 into the narrow voltage range required by the main device body 20, thus solving the problem of power supply mismatch.

[0051] In addition, the battery management system 31 is also used to control the voltage conversion circuit 33 to operate in a charging state when no undervoltage is detected on the DC bus, so as to convert the DC voltage of the DC bus into a voltage or charging power suitable for charging the battery circuit 32.

[0052] For servers, large-scale deployment could impact the power grid because intelligent computing is characterized by frequent load fluctuations. These fluctuations put significant pressure on grid dispatching and front-end power distribution (including transformers, distribution protection devices, harmonic mitigation, and reactive power compensation equipment). Existing solutions typically configure power based on the maximum load power, which undoubtedly increases construction and operating costs. Current technologies address frequent load fluctuations through the rapid charging and discharging of lithium batteries. However, lithium batteries have limited cycle life and charge / discharge rates; frequent rapid discharge would quickly deplete their lifespan.

[0053] In one embodiment of the present invention, reference is made to... Figure 3 The main equipment backup battery unit 30 further includes: Capacitor circuit 34; The voltage conversion circuit 33 includes a unidirectional voltage conversion module 331 and a bidirectional voltage conversion module 332. The unidirectional voltage conversion module 331 is connected to the DC bus and the battery circuit 32, respectively, and the bidirectional voltage conversion module 332 is connected to the DC bus and the capacitor circuit 34, respectively.

[0054] In this embodiment, the bidirectional voltage conversion module 332 is used to convert the wide voltage range / linear voltage of the capacitor circuit 34 into the narrow voltage range required to power the main device 20 during discharge. It is also used to convert the DC voltage of the DC bus into a voltage suitable for charging the capacitor circuit 34 during charging. Furthermore, the bidirectional voltage conversion module 332 is used to control and limit the charging and discharging power of the capacitor circuit 34 to protect the battery cells. The unidirectional voltage conversion module 331 is used to convert the DC bus voltage into a voltage suitable for charging the battery circuit 32. Considering that the battery circuit 32 needs to discharge quickly in the event of a mains power outage to ensure uninterrupted operation of the main device 20, the unidirectional voltage conversion module 331 is not needed during battery circuit 32 discharge. This avoids the delay of the unidirectional voltage conversion module 331 itself causing a slower discharge response in the battery circuit 32, ensuring rapid discharge of the battery circuit 32 in the event of a mains power outage.

[0055] In one embodiment, the unidirectional voltage conversion module 331 and the bidirectional voltage conversion module 332 are also integrated with a power protection circuit. The power protection circuit is used to control the unidirectional voltage conversion module 331 / bidirectional voltage conversion module 332 to stop working when the power output of the battery circuit 32 / capacitor circuit 34 is too high or the power of the DC bus is too high, so as to avoid damage to the main equipment body 20 due to excessive power.

[0056] In this embodiment, the capacitor circuit 34 can be implemented using energy storage components such as supercapacitors or lithium-ion capacitors. Supercapacitors or lithium-ion capacitors have near-infinite cycle life and extremely high charge / discharge rates, enabling rapid charging and discharging. When the load on the main equipment 20 is high, its instantaneous power demand increases, which may cause large fluctuations in the current or voltage on the DC bus. At this time, the capacitor circuit 34 will quickly release the stored electrical energy to supplement the extra electrical energy required by the main equipment 20, thereby "smoothing" the peak current or voltage. When the load on the main equipment 20 is low, the instantaneous power demand of the main equipment 20 is small, and the current / voltage on the DC bus may be relatively low. At this time, the capacitor circuit 34 will quickly absorb the excess electrical energy on the DC bus and store it, providing energy reserves for subsequent overload of the main equipment 20. It should be noted that the capacitor circuit 34 has a lifespan of millions of cycles, and its response time can reach the millisecond level, making it very suitable for dealing with current or voltage fluctuations caused by transient load changes.

[0057] The capacitor circuit 34 is connected in parallel with the aforementioned battery circuit 32. During load fluctuations, the main equipment body 20 is first charged and discharged through the capacitor circuit 34 to cope with frequent load fluctuations. If the bus voltage or mains power fails to recover within the limited discharge time, the battery circuit 32 is controlled to discharge. The battery circuit 32 is typically implemented using a lithium battery, which can provide continuous backup power support for the main equipment body 20 for an extended period. This embodiment utilizes the supercapacitor's million-cycle lifespan to cope with frequent load fluctuations, and also leverages the lithium battery's limited cycle life but high energy density to provide long-term emergency power supply to the main equipment body 20.

[0058] In one embodiment of the present invention, the battery management system 31 is further configured to acquire the power of the main device body 20, and control the capacitor circuit 34 to discharge to the DC bus when the power of the main device body 20 is greater than or equal to a first preset power threshold. The battery management system 31 is also used to control the capacitor circuit 34 to charge from the DC bus when the power of the main equipment body 20 is less than the second preset power threshold. Wherein, the first preset power threshold is greater than the second preset power threshold.

[0059] The first preset power threshold is the high load power threshold of the main equipment body 20, and the second preset power threshold is a threshold set according to the mains power supply capacity and the power demand of the main equipment body 20. When the load power is lower than the threshold, it indicates that the mains power has surplus power.

[0060] It should be noted that the power of the power conversion module 10 is also limited by the mains power. When the load power of the main equipment 20 exceeds the power of the power conversion module 10 or the set module power limit, the output voltage of the first power conversion module 10 will decrease. At this time, the battery management system 31 can judge the power status of the main equipment 20 based on the DC bus voltage. When the DC bus voltage is greater than the upper limit voltage threshold, the battery management system 31 determines that the power of the main equipment 20 is greater than or equal to the first preset power threshold, that is, the main equipment 20 is overloaded (sudden increase in load or surge in instantaneous power demand). When the main equipment 20 is overloaded, the battery management system 31 controls the capacitor circuit 34 to discharge to the DC bus so that the capacitor circuit 34 releases the stored electrical energy to supplement the additional electrical energy required by the main equipment 20.

[0061] When the voltage of the DC bus is less than the lower limit voltage threshold, the battery management system 31 determines that the power of the main equipment 20 is lower than the second preset power threshold, that is, the mains power is surplus. When the mains power is surplus, the battery management system 31 controls the capacitor circuit 34 to charge from the DC bus. This setting not only makes full use of the surplus mains power to charge the energy storage capacitor circuit 34 and improves energy utilization efficiency, but also mitigates the impact on the power grid.

[0062] With the above settings, the electronic device of the present invention can control the charging and discharging state of the capacitor circuit 34 in real time according to the load conditions, so that the main device body 20 can adapt to different load fluctuations and improve the overall reliability and stability of operation.

[0063] In this embodiment, the battery management system 31 is further configured to execute a first timing when the power of the main device body 20 is greater than or equal to a first preset power threshold; and to stop the first timing when the power of the main device body 20 is less than the first preset power threshold. The battery management system 31 is also used to control the battery circuit 32 to discharge to the DC bus when the duration of the first timing is longer than the first preset duration.

[0064] It should be noted that when the duration of the first timing exceeds the first preset duration, it indicates that the overload duration of the main device 20 is relatively long. In this case, the battery management system 31 controls the capacitor circuit 34 to discharge. Since the battery circuit 32 has a large capacity, the battery circuit 32 can continuously replenish the additional power required by the main device 20 for a long time.

[0065] The present invention also proposes an electronic device, including a main device body 20 and the power system described above; the main device body 20 is electrically connected to the power system.

[0066] It is worth noting that since the electronic device of the present invention is based on the power system described above, the embodiments of the electronic device of the present invention include all the technical solutions of all the embodiments of the power system described above, and the technical effects achieved are exactly the same, so they will not be repeated here.

[0067] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A power supply system, characterized in that, include: A power input terminal, which is used to connect to mains power; A power conversion module, wherein the input terminal of the power conversion module is connected to the power input terminal, and the output terminal of the power conversion module is used to connect to the main body of the main equipment through a DC bus; Multiple main equipment backup battery units, wherein the main equipment backup battery units are electrically connected to the DC bus; The operating modes of the main equipment backup battery unit include discharge mode and hot standby discharge mode, and at least one of the multiple main equipment backup battery units operates in hot standby discharge mode. The main equipment backup battery unit operating in hot standby discharge mode is used to discharge to the DC bus when the voltage of the DC bus is less than a preset voltage threshold, and outputs a discharge trigger signal. At least a portion of the remaining main equipment backup battery units operate in discharge mode upon receiving the discharge trigger signal.

2. The power supply system as described in claim 1, characterized in that, One of the multiple main equipment backup battery units is the master unit, and the remaining main equipment backup battery units are slave units; the operating modes of the main equipment backup battery units include hot standby discharge mode, discharge mode, charging mode and standby mode; When the backup battery unit of the main device is the host in the hot standby discharge mode, the host is used to discharge when the voltage of the DC bus is less than a preset voltage threshold and output the discharge trigger signal to control at least some of the slave devices that are operating in charging mode / standby mode to switch to the discharge mode. When the backup battery unit of the master device is a slave device operating in hot standby discharge mode, the slave device discharges to the DC bus when the voltage of the DC bus is less than a preset voltage threshold, and outputs a discharge trigger signal to the master device, so that the master device controls at least some of the remaining slave devices to operate in discharge mode when the discharge trigger signal is received.

3. The power supply system as described in claim 2, characterized in that, The host is used to obtain the remaining power of multiple main device backup battery units, and when the remaining power of the main device backup battery unit is greater than a first preset power threshold, it controls the main device backup battery unit to work in hot standby discharge mode until the number of main device backup battery units in hot standby discharge mode reaches a preset number. The host is also used to control the main device backup battery unit to operate in charging mode when the remaining power of the main device backup battery unit is less than or equal to a first preset power threshold.

4. The power supply system as described in claim 2, characterized in that, The host is also used to acquire the power consumption of the main device body, and adjust the number of main device backup battery units operating in hot standby discharge mode and the number of main device backup battery units that receive the discharge trigger signal according to the power consumption of the main device body.

5. The power supply system according to any one of claims 1 to 4, characterized in that, The main equipment backup battery unit includes: The battery circuit and the battery management system are respectively electrically connected to the DC bus and the battery management system; the battery management systems of the multiple main equipment backup battery units are interconnected.

6. The power supply system as described in claim 5, characterized in that, The main equipment backup battery unit also includes: A voltage conversion circuit, wherein the first terminal of the voltage conversion circuit is connected to the DC bus, the second terminal of the voltage conversion circuit is connected to the battery circuit, and the controlled terminal of the voltage conversion circuit is electrically connected to the battery management system.

7. The power supply system as described in claim 6, characterized in that, The main equipment backup battery unit also includes: Capacitor circuit; The voltage conversion circuit includes a unidirectional voltage conversion module and a bidirectional voltage conversion module. The unidirectional voltage conversion module is connected to the DC bus and the battery circuit, respectively, and the bidirectional voltage conversion module is connected to the DC bus and the capacitor circuit, respectively.

8. The power supply system as described in claim 7, characterized in that, The battery management system is also used to acquire the power of the main device body, and when the power of the main device body is greater than or equal to a first preset power threshold, control the capacitor circuit to discharge to the DC bus; The battery management system is also used to control the capacitor circuit to charge from the DC bus when the power of the main device body is less than a second preset power threshold. Wherein, the first preset power threshold is greater than the second preset power threshold.

9. The power supply system as described in claim 8, characterized in that, The battery management system is further configured to execute a first timing when the power of the main device body is greater than or equal to a first preset power threshold, and to stop the first timing when the power of the main device body is less than the first preset power threshold. The battery management system is also used to control the battery circuit to discharge to the DC bus when the duration of the first timing is longer than the first preset duration.

10. An electronic device, characterized in that, It includes a main equipment body and a power supply system as described in any one of claims 1 to 9; the main equipment body is electrically connected to the power supply system.

Images