Universally adaptable multi-module parallel power supply system

Abstract

The present invention discloses a universally adaptable multi-module parallel power supply system, including one or more rectifier branches connected in parallel to a DC busbar connected to an AC input distribution unit, each rectifier branch is connected in series with a rectifier and an intelligent adapter, and when there are multiple rectifier branches, the manufacturers and models of the rectifiers are not completely the same or completely different. The rectifier resource integration of different manufacturers and models is achieved, and the capacity of the power supply system is also expanded. The information collection and current equalization management of the parallel rectifier branches are achieved through the intelligent adapter on each rectifier branch, which improves the power supply stability, high efficiency and reliability of the power supply system, and realizes asset life extension. It can be an important means for communication operators to reduce costs and increase efficiency.

Description

Technical Field

[0001] The invention relates to a base station power supply system, and in particular to a universally adaptable multi-module parallel power supply system. Background Art

[0002] Since the 1990s, various public communication networks have experienced nearly 30 years of rapid development. Operators and tower companies have stored a large number of idle, old switching power supply systems to be scrapped due to the reasons that the depreciation of the original switching power supply systems has reached the scrap age, the functional structure of the original switching power supply systems does not meet the new network operation requirements, the original switching power supply systems do not meet the capacity requirements after load expansion, and the original switching power supply equipment manufacturers are unable to provide continuous after-sales maintenance and other technical support. Although these idle assets withdrawn to the warehouse have various reasons for scrapping, most of the switching rectifiers are still in a usable state, and the existing conventional technical solutions cannot achieve effective integration and reuse of these equipment.

[0003] At the same time, during the process of increasing the load capacity of base stations, the old switching power supply systems of some sites could not expand their capacity because the manufacturers could not buy corresponding rectifier modules due to suspension of production, bankruptcy or change of production and operation. This resulted in a shortage of rectifier modules or forced replacement of power supplies, causing idle assets and unnecessarily increasing investment costs.

[0004] Under the current reality that communication operators are facing increasing cost and investment pressures, how to rationally utilize idle assets such as old switching power supply modules to extend asset life is an important means for communication operators to reduce costs and increase efficiency. Summary of the invention

[0005] The present invention aims to at least solve the technical problems existing in the prior art, and in particular innovatively proposes a universally adaptable multi-module parallel power supply system.

[0006] In order to achieve the above-mentioned purpose of the present invention, the present invention provides a universally adaptable multi-module parallel power supply system, including one or more rectifier branches connected in parallel to a DC bus connected to an AC input distribution unit, each rectifier branch being connected in series with a rectifier and an intelligent adapter. When there are multiple rectifier branches, the manufacturers and models of the rectifiers are not completely the same or are completely different.

[0007] The above technical solution integrates rectifier resources from different manufacturers and models, and also expands the capacity of the power supply system. Through the intelligent adapter on each rectifier branch, it realizes information collection and current equalization management of parallel rectifier branches, improves the power supply stability, efficiency and reliability of the power supply system, and extends the life of assets. It is an important means for telecommunications operators to reduce costs and increase efficiency.

[0008] In a preferred embodiment of the present invention, all or part of the rectifier is an old rectifier; all or part of the old rectifier comes from an idle and old switching power supply system to be scrapped, and the age, model, and capacity of the old switching power supply system are the same, not completely the same, or completely different.

[0009] The above technical solution realizes the function of reusing old resources. By using the old rectifiers in the old switching power supply system that is idle and waiting to be scrapped, it realizes the integration and utilization of old resources, reduces investment costs, extends the life of assets, and achieves cost reduction and efficiency improvement.

[0010] In a preferred embodiment of the present invention, a plurality of the power supply systems can be cascaded to form a power supply system with a larger capacity.

[0011] The above technical solution: realizes cascade expansion.

[0012] In a preferred embodiment of the present invention, the intelligent adapter includes an acquisition module, a processing module and a DC / DC voltage conversion module, the input end of the DC / DC voltage conversion module is connected to the output end of the rectifier, the output end of the DC / DC voltage conversion module is connected to the DC bus, the control end of the DC / DC voltage conversion module is connected to the DC / DC control signal output end of the processing module, the acquisition module acquires the voltage and / or current on the input line and / or output line of the DC / DC voltage conversion module, the output end of the acquisition module is connected to the information acquisition end of the processing module, and the processing module obtains the voltage and / or current information output by the acquisition module and adjusts the output voltage output by the DC / DC voltage conversion module.

[0013] The above technical solution: through the acquisition module, the processing module can understand the real-time status of each rectifier branch, and adjust the output voltage of the DC / DC voltage conversion module to achieve current sharing management and improve power supply efficiency and stability.

[0014] In a preferred embodiment of the present invention, the smart adapter also includes a monitoring communication interface connected to the processing module, through which all smart adapters are connected to form a monitoring communication network, and the monitoring communication network can be connected to communicate with a host computer; through the monitoring communication network, the smart adapters coordinate with each other to adjust the voltage and / or current of the rectifier branch entering the DC bus, thereby realizing current sharing management of the rectifier branch.

[0015] The above technical solution: through the monitoring communication network, the intelligent adapters on each rectifier branch can coordinate work, which is conducive to the realization of current sharing management. In the case of the lack of some base station monitoring units CSU, it can replace the third-party general monitoring unit. At the same time, it is also convenient to connect multiple power supply systems through the monitoring communication network to form a cascade monitoring effect.

[0016] In a preferred embodiment of the present invention, the smart adapter also includes an alarm module, and the processing module determines whether the voltage and / or current output by the acquisition module is within a safe range. If not, the alarm module is activated and / or an alarm signal is reported through the monitoring communication network.

[0017] The above technical solution realizes the safety monitoring of each rectifier branch.

[0018] In a preferred embodiment of the present invention, it also includes a charge and discharge management system, which manages the charge and discharge of multiple batteries connected to the DC bus, and the charge and discharge management system is connected to the monitoring communication network through a communication interface; and / or a battery current collector is configured at the battery bus end, and the maximum charging voltage and maximum charging current of the battery connected to the battery DC bus end are set through the processing module of the smart adapter.

[0019] The above technical solution can manage the charge and discharge of the power supply on the DC bus without setting up a separate charge and discharge management center, simplifying the management system. The intelligent adapter can realize real-time detection of the voltage and current at the battery bus terminal (the connection between the battery and the DC bus) during charging. The battery current collector can input the processing module of the intelligent adapter through the monitoring communication network. The processing module determines whether the current charging voltage reaches the maximum charging voltage. If so, charging is stopped. It determines whether the current charging current reaches the maximum charging current. If so, charging is disconnected to protect the battery.

[0020] In a preferred embodiment of the present invention, the charge and discharge management system includes a plurality of batteries connected in parallel and an electrical signal sampling unit, wherein the input end of the electrical signal sampling unit is respectively connected to the power ports of all the batteries, and the power ports of the batteries are connected to the DC bus; it also includes a plurality of battery charge and discharge management modules corresponding to the batteries one by one, wherein the battery charge and discharge management modules include a boost unit, a discharge current limiting unit, a charge current limiting unit, a switching switch, a fourth switch, and a management unit; the switching switch includes a moving contact and three static contacts, the power port of the battery is connected to the moving contact of the switching switch, and the first static contact of the switching switch is connected to the DC bus in sequence through the discharge current limiting unit and the boost unit. The fourth switch is connected to the boost unit in parallel, the second static contact of the switching switch is connected to the DC bus through the charging current unit, and the third static contact of the switching switch is suspended; the information acquisition end of the management unit is connected to the output end of the electrical signal sampling unit, the first control end of the management unit is connected to the control end of the switching switch, the second control end of the management unit is connected to the control end of the fourth switch, the third control end of the management unit is connected to the control end of the discharge current limiting unit, and the fourth control end of the management unit is connected to the control end of the charge current limiting unit. All management units are connected to the monitoring communication network through the communication interface, and the batteries are charged and discharged collaboratively through the monitoring communication network.

[0021] The above technical solution: monitors and controls the voltage and current of each parallel battery branch, realizes independent management of the charging and discharging process of each battery group, achieves the purpose of multiple battery groups working in parallel and realizes constant voltage output during discharge.

[0022] In a preferred embodiment of the present invention, it further comprises an intelligent power distribution unit, which distributes the electric energy of the DC bus to each load.

[0023] The above technical solution: realizes intelligent power distribution management of loads.

[0024] In a preferred embodiment of the present invention, the intelligent power distribution unit includes a base station power distribution unit, and at least one custom household selection unit is arranged between the base station power distribution unit and multiple power supply branches, and the custom household selection unit is connected to the monitoring communication network for communication; the custom household selection unit uses a software module to select any power supply branch from N power supply branches of the base station to form a household, N is a positive integer, and the software module can independently control each power supply branch in the household, and the software module can also uniformly control all power supply branches in the household.

[0025] The above technical solution: The customized household selection unit abandons the existing fixed household selection method in which each household is connected to the output end of the distribution unit through a mechanical switch or a DC contactor. The customized household selection unit provided by the present invention can select any power supply branch from the N power supply branches of the base station according to user customization through a software module to form a household, and the power supply branches can be controlled independently, or the households can be controlled uniformly as controlled units. The household as a whole or the power supply branch can be independently controlled, metered, differentiated for backup and power generation, and output status locked and unlocked, thereby realizing dynamic customized household division, which can meet the differentiated needs of operators, refined management, and adapt to the needs of different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a generally applicable multi-module parallel power supply system in a specific embodiment of the present invention;

[0027] Figure 2 It is a structural schematic diagram of a battery charge and discharge management module in a specific implementation mode of the present invention;

[0028] Figure 3 It is a structural schematic diagram of a user-defined household selection unit in a specific implementation mode of the present invention;

[0029] Figure 4 It is a structural diagram of a custom household selection unit in another specific implementation manner of the present invention. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0033] The present invention discloses a universally adaptable multi-module parallel power supply system. In a preferred embodiment, Figure 1 As shown, it includes one or more rectifier branches connected in parallel to the DC busbar and connected to the AC input distribution unit. A rectifier and an intelligent adapter are connected in series on each rectifier branch. When there are multiple rectifier branches, the manufacturers and models of the rectifiers are not completely the same or are completely different.

[0034] In this embodiment, if Figure 1 As shown, the AC input distribution unit transforms the 220V mains power or 380V industrial power input to the base station into a power supply voltage range of the base station equipment. The AC input distribution unit is preferably but not limited to a transformer. The AC signal output by the AC input distribution unit is rectified into DC power through a rectifier. The smart adapter is used to convert the rectified DC power into stable and reliable DC power with a voltage close to or equal to that of the DC bus. The rated voltage of the DC bus is preferably but not limited to 48V or 57V.

[0035] In this embodiment, preferably, the smart adapter includes a DC / DC voltage conversion module, and the output voltage of the DC / DC voltage conversion module of each rectifier branch is equal to or close to the rated voltage of the DC bus (such as 48V or 57V). The DC / DC voltage conversion module can be an existing buck type DC-DC converter.

[0036] In this embodiment, "not completely identical" may mean that the manufacturers and models of the rectifiers are partially identical. Since the manufacturers and models of the rectifiers are not completely identical or completely different, the rectification capacity, DC impedance, and current carrying capacity of the rectifiers on each rectifier branch vary greatly. Through the intelligent adapter, multiple rectifier branches are stably and evenly connected to the DC bus, thereby improving power supply safety and reliability and extending the life of the power supply system.

[0037] In a preferred embodiment, the intelligent adapter includes a collection module, a processing module and a DC / DC voltage conversion module. The input end of the DC / DC voltage conversion module is connected to the output end of the rectifier, the output end of the DC / DC voltage conversion module is connected to the DC bus, the control end of the DC / DC voltage conversion module is connected to the DC / DC control signal output end of the processing module, the collection module collects the voltage and / or current on the input line and / or output line of the DC / DC voltage conversion module, and the output end of the collection module is connected to the information collection end of the processing module. The collection module preferably includes, but is not limited to, a DC voltage sensor and / or a DC current sensor. The processing module is preferably, but is not limited to, a 51 single-chip microcomputer or an ARM.

[0038] In this embodiment, preferably, the intelligent adapter also includes an alarm module, and the processing module determines whether the voltage and / or current output by the acquisition module is within a safe range. If it is not within the safe range, the alarm module is activated and / or an alarm signal is reported through the monitoring communication network. For example, the voltage safety range and current safety range of the input circuit of the DC / DC voltage conversion module, as well as the voltage safety range and current safety range of the output circuit of the DC / DC voltage conversion module can be stored inside the processing module, and it is determined whether the voltage and current on the input circuit and output circuit of the DC / DC voltage conversion module are within the corresponding safe range. If it is not within the safe range, an alarm is issued.

[0039] In this embodiment, preferably, the processing module obtains the voltage and / or current information output by the acquisition module and adjusts the output voltage output by the DC / DC voltage conversion module, so as to facilitate the control of the output voltage of the DC / DC voltage conversion module to the rated voltage of the DC bus, or to achieve the current equalization regulation between the parallel rectifier branches. Preferably, the DC / DC voltage conversion module includes a DC / DC voltage conversion chip and a feedback voltage regulation unit. The feedback voltage regulation unit is used to adjust the feedback voltage of the DC / DC voltage conversion chip, thereby adjusting the output voltage of the DC / DC voltage conversion chip. The DC / DC control signal output terminal of the processing module (preferably but not limited to a GPIO pin) is connected to the enable terminal of the DC / DC voltage conversion chip, the control terminal of the feedback voltage regulation unit is connected to the feedback regulation signal terminal of the processing module (preferably, the two are connected through a serial port such as I2C), and the output terminal of the feedback voltage regulation unit is connected to the negative feedback terminal (such as the FB pin) of the DC / DC voltage conversion chip. The feedback voltage regulating unit is preferably but not limited to a digital potentiometer or a D / A converter. For the specific connection circuit, reference may be made to the technical solutions disclosed in http: / / www.fx361.com / page / 2017 / 0605 / 1951704.shtm l or https: / / blog.csdn.net / xingsongyu / article / details / 104527368, which will not be described in detail here.

[0040] In a preferred embodiment, the smart adapter also includes a monitoring communication interface connected to the processing module, through which all smart adapters are connected to form a monitoring communication network, and the monitoring communication network can be connected to communicate with a host computer; through the monitoring communication network, the smart adapters coordinate with each other to adjust the voltage and / or current of the rectifier branch entering the DC bus, thereby realizing current equalization management of the rectifier branch, thereby improving the reliability and stability of the power supply system.

[0041] In this embodiment, the monitoring communication interface is preferably but not limited to an RS485 interface, and the monitoring communication network is an RS485 communication network. Information sharing between intelligent adapters is achieved through the monitoring communication network, and then current sharing control is performed. Preferably, the process of current sharing control is: setting the target current output by the DC / DC voltage conversion module to the DC bus, the target current is preferably but not limited to 50A, if the current of the rectifier branch flowing into the DC bus (i.e., the output line current of the DC / DC voltage conversion module) is greater than the target current, the processing module controls the feedback voltage adjustment unit to increase the output voltage, and the DC / DC voltage conversion chip reduces the output voltage due to the increase in feedback voltage, and continues to adjust until the current of the rectifier branch flowing into the DC bus is equal to or close to (the difference can be considered to be close to 5% within the range) the target current, on the contrary, if the current of the rectifier branch flowing into the DC bus is less than the target current, the output voltage of the DC / DC voltage conversion chip is increased.

[0042] In a preferred embodiment, Figure 1 As shown, all or part of the rectifiers are old rectifiers; all or part of the old rectifiers come from old switching power supply systems that are idle and waiting to be scrapped, and the age, model, and capacity of the old switching power supply systems are the same, not completely the same, or completely different.

[0043] In a preferred embodiment, a plurality of universally adaptable multi-module parallel power supply systems can be cascaded to form a power supply system with a larger capacity.

[0044] In this embodiment, preferably, multiple universally adaptable multi-module parallel power supply systems can be directly connected in parallel to achieve cascading, the input terminals of the universally adaptable multi-module parallel power supply systems are respectively connected to the AC input distribution unit, and the output terminals of the universally adaptable multi-module parallel power supply systems are respectively connected to the DC bus, and then the output voltage of each smart adapter is adjusted according to the rated voltage of the DC bus. If the smart adapters form a monitoring communication network, the monitoring communication networks of multiple universally adaptable multi-module parallel power supply systems can also be connected to form a larger monitoring communication network to achieve unified current sharing management.

[0045] In a preferred embodiment, it also includes a charge and discharge management system, which manages the charge and discharge of multiple batteries connected to the DC bus, and the charge and discharge management system is connected to the monitoring communication network through a communication interface; and / or a battery current collector is configured at the battery bus end, and the maximum charging voltage and maximum charging current of the battery connected to the battery DC bus end are set through the processing module of the smart adapter. Preferably, the battery current collector includes a current sensor and a voltage sensor for measuring the current and voltage at the battery bus end respectively.

[0046] In a preferred embodiment, Figure 2As shown, the charge and discharge management system includes multiple parallel batteries and electrical signal sampling units, the input end of the electrical signal sampling unit is respectively connected to the power ports of all batteries, and the power port of the battery is connected to the DC bus; it also includes multiple battery charge and discharge management modules corresponding to the batteries one by one, and the battery charge and discharge management module includes a boost unit, a discharge current limiting unit, a charge current limiting unit, a switching switch K3, a fourth switch K4, and a management unit. The boost unit is preferably but not limited to an existing BOOST boost-type DC-DC voltage converter. Preferably, the output voltage of the boost unit is the same as the rated voltage of the common input and output terminals, such as 48VDC or 57VDC. The charge current limiting unit and the discharge current limiting unit are preferably but not limited to programmable variable resistors. When the charge current limiting unit and the discharge current limiting unit are programmable variable groups, they can be digital potentiometers or programmable resistors, such as digital potentiometers with a model of X9241. At this time, the management unit adjusts the discharge current or charging current by adjusting the resistance value of the discharge current limiting unit or the charging current unit. The management unit is preferably but not limited to a 51 single-chip microcomputer.

[0047] In this embodiment, if Figure 2 As shown, the switching switch K3 includes a moving contact and three static contacts, the power port of the battery is connected to the moving contact of the switching switch K3, the first static contact of the switching switch K3 is connected to the DC bus through the discharge current limiting unit and the boost unit in sequence, the fourth switch K4 is connected in parallel with the boost unit, the second static contact of the switching switch K3 is connected to the DC bus through the charging current unit, and the third static contact of the switching switch K3 is suspended; the information acquisition end of the management unit is connected to the output end of the electrical signal sampling unit, the first control end of the management unit is connected to the control end of the switching switch K3, the second control end of the management unit is connected to the control end of the fourth switch K4, the third control end of the management unit is connected to the control end of the discharge current limiting unit, and the fourth control end of the management unit is connected to the control end of the charging current limiting unit. All management units are connected to the monitoring communication network through the communication interface, and the batteries are charged and discharged in coordination through the monitoring communication network.

[0048] In this embodiment, if Figure 2 As shown, during the charging stage, the selected charging mode is shared by monitoring the communication network. If it is a shared charging mode, each battery charge and discharge management module manages the charging of the corresponding battery according to the set charging parameters. If it is a single charging mode, the batteries are charged in sequence according to the charging priority. Each battery charge and discharge management module obtains the charging status of the battery with the previous charging priority through the charge and discharge management network. When the charging of the battery with the previous charging priority is completed, the charging of the battery corresponding to the battery charge and discharge management module is started.

[0049] In this embodiment, for each battery, when charging, the management unit connects the moving contact of the switch K3 with the second static contact. Initially, if the battery voltage is within the set safety voltage range, the management unit adjusts the resistance of the charging current limiting unit so as to charge with a preset maximum charging current, and then monitors the charging voltage of the battery in real time. When the battery charging voltage is not within the set voltage range, the management unit adjusts the resistance of the charging current limiting unit so that the charging current is less than the preset maximum charging current, which may be the rated charging current of the battery. When the battery charging voltage reaches the charging cut-off voltage or the charging current is the charging cut-off current, the moving contact of the switch K3 is connected with the suspended third static contact, and the battery charging is disconnected.

[0050] In this embodiment, if Figure 2 As shown, in the discharge stage, the selected discharge mode is shared through the monitoring communication network. If it is a common discharge mode, at the beginning, each discharge branch outputs in a constant voltage mode, and the discharge current of each branch is adjusted according to the discharge capacity of each branch battery, so that each branch battery is discharged in proportion to the discharge capacity. If it is a priority discharge mode, each battery charge and discharge management module obtains the discharge status of its previous discharge priority battery through the charge and discharge management network. When the discharge of the high discharge priority battery is terminated; or the maximum discharge capacity of the high discharge priority battery cannot meet the load power demand; or the high discharge priority battery fails and cannot support the load power supply demand, the corresponding battery is started to discharge.

[0051] In this embodiment, for each battery, when in discharge, the management unit controls the moving contact of the switching switch K3 to be connected with the first static contact, and the voltage outputted from each discharge branch to the common input and output end is the voltage outputted by the boost unit, and is outputted at a constant voltage. At the same time, the management unit dynamically sets the resistance value of the discharge current limiting unit according to the discharge capacity of the battery (the rated discharge capacity in the initial stage and the actual discharge capacity after the capacity verification), so that the discharge current of each discharge branch battery is in the same proportion as the discharge capacity of the battery. As the battery discharges, the actual power of the battery gradually decreases. When the discharge current of the battery decreases to the preset current limiting value, the management unit controls the fourth switch K4 to be closed (the initial state of the fourth switch K4 is disconnected), the boost unit is short-circuited, and the battery is discharged in the current limiting mode. At this time, the management unit continues to dynamically set the resistance value of the current limiting unit of each branch, so that the discharge current of each discharge branch battery is in the same proportion as the actual discharge capacity of the battery. As the battery further discharges, when the battery voltage decreases to the low voltage threshold, the battery discharge circuit is cut off, that is, the management unit controls the moving contact of the switching switch K3 to be connected with the suspended third static contact.

[0052] In this embodiment, the method for managing the charging and discharging of multiple parallel batteries based on a monitoring communication network includes: a charging method and a discharging method.

[0053] In this embodiment, the charging method includes a co-charging mode and a single charging mode; in the co-charging mode, each battery is charged simultaneously according to its own set charging parameters; in the single charging mode, each battery is charged in sequence according to the set charging priority.

[0054] In this embodiment, the charging parameters of the battery preferably include, but are not limited to, a charging current range, a charging cut-off voltage, a rated charging current, a charging cut-off current, a pre-charging current, a pre-charging voltage, etc. When it is detected that the voltage of the battery is lower than the pre-charging voltage, the battery is charged with the pre-charging current. When the battery voltage is greater than the pre-charging voltage, the charging current is controlled within the charging current range. When it is detected that the battery voltage reaches the charging cut-off voltage and / or the charging current is the charging cut-off current, the battery is stopped from charging. The capacity, manufacturer, and model of the parallel batteries may be different, and the charging parameters set for each battery may be different, and can be set according to the capacity, manufacturer, and model of the battery itself. In the co-charging mode and the single charging mode, each battery is charged according to the charging parameters set by each battery, thereby realizing independent charging management of the parallel batteries.

[0055] In this embodiment, the charging priority is preferably but not limited to being set according to the size of the rated capacity of the battery, such as the larger the rated capacity, the higher the charging priority; or it is set according to the actual remaining power of the battery, such as the smaller the remaining power, the higher the charging priority; or the charging priority can be customized according to the battery manufacturer, etc.

[0056] The above technical solution: when the co-charging mode is selected, each battery is charged at the same time according to the charging parameters set by each battery, so that the batteries are charged at the same time but managed separately. When the single charging mode is selected, the batteries are charged according to the charging priority, which can be customized by the user, such as setting the priority level according to the battery capacity or the remaining power. In this way, the battery pack can be quickly and reliably backed up, and the independent management of each battery charging can be realized. This charging method realizes the safe charging management of independently controlled batteries of different capacities, manufacturers, and models.

[0057] In this embodiment, preferably, during the charging process, when the battery charging voltage is within a set voltage range, charging is performed with a preset maximum charging current. The safe voltage range of the battery is pre-set, and charging is performed with a preset maximum charging current to achieve fast and safe charging.

[0058] In this embodiment, the discharge method includes a common discharge mode and a priority discharge mode; when in the common discharge mode, the discharge current of each branch is adjusted according to the discharge capacity of each branch battery, so that each branch battery is discharged in proportion to the discharge capacity; when in the priority discharge mode, the discharge priority of different batteries is set, and when the city power is cut off, each battery is discharged in order according to the discharge priority.

[0059] In this embodiment, in the common discharge mode, the battery discharge capacity unit is ampere, including the rated discharge capacity and the actual discharge capacity, the rated discharge capacity is the battery rated capacity × discharge capacity coefficient, and the actual discharge capacity is the actual discharge capacity (i.e., the actual battery power) × discharge capacity coefficient. Each branch battery discharges according to the proportion of discharge capacity, and the discharge current proportion of each discharge branch is the same as the discharge capacity proportion of each branch battery, so that balanced discharge of each branch can be achieved.

[0060] In this embodiment, the discharge priority is preferably but not limited to being set according to the rated capacity of the battery, that is, the larger the rated capacity of the battery, the higher the discharge priority; or it is set according to the actual power of the battery, that is, the larger the actual power of the battery, the higher the discharge priority; or the discharge priority is user-defined based on information such as the battery manufacturer.

[0061] The above technical solution: when in common discharge mode, the parallel battery is individually controlled and managed for discharge, and each branch battery is discharged in proportion to the discharge capacity, which can protect the battery from over-discharge and realize the independent management of each battery discharge; when in priority discharge mode, the discharge priority can be customized by the user, such as setting the priority level according to the battery capacity or the remaining power, so that the battery pack can be discharged quickly and reliably, and the independent management of each battery discharge can be realized. This discharge method realizes the safe and reliable discharge of batteries of different capacities (including rated capacity and actual remaining power), different manufacturers, and different models together or according to the discharge priority.

[0062] In this embodiment, preferably, the common discharge mode includes an automatic mode and a manual mode;

[0063] When in automatic mode, in the initial stage, the discharge current of the batteries in each branch is adjusted according to the rated discharge capacity of each branch battery, so that each branch battery is discharged in proportion to the rated discharge capacity, and the capacity verification of all batteries is completed periodically. After each completion of the capacity verification of all batteries, the battery is discharged in proportion to the actual discharge capacity of the battery; except that in the initial stage, each branch battery is discharged in proportion to the rated discharge capacity, after each subsequent verification of the actual capacity of all batteries, each branch is discharged in proportion to the actual discharge capacity of the battery, which makes the discharge balance effect of parallel batteries better.

[0064] In manual mode, the discharge current of each branch is adjusted according to the rated discharge capacity of the battery in each branch, so that each branch battery is discharged in proportion to the rated discharge capacity. In manual mode, during the entire discharge process, each branch battery is discharged in a fixed proportion to the rated discharge capacity.

[0065] The above technical solution: realizes that during the operation in the common discharge mode, the discharge branch batteries are discharged according to their respective actual discharge capacities, thereby achieving balanced discharge of the discharge branch batteries and protecting the discharge branch batteries.

[0066] In this embodiment, preferably, when in priority discharge mode, when the discharge of a high discharge priority battery is terminated, it can be determined by collecting the voltage and / or current of the high priority battery discharge circuit; or the maximum discharge capacity of the high discharge priority battery cannot meet the power demand of the load. At this time, the battery of the latter discharge priority can be added in parallel and discharged simultaneously. Preferably, it can be determined according to the voltage or current state of the load power supply circuit that the maximum discharge capacity of the high discharge priority battery cannot meet the power demand of the load. For example, when the voltage is too low, or the current exceeds the actual discharge capacity of the high discharge priority battery, it can be considered that the maximum discharge capacity of the high discharge priority battery cannot meet the power demand of the load; or when the high discharge priority battery fails and cannot support the load power supply demand, the low discharge priority battery discharges, and the battery failure can be obtained through battery reporting.

[0067] The above technical solution realizes that in the priority discharge mode, the battery automatically continues to discharge or skips the faulty battery according to the discharge priority.

[0068] In this embodiment, preferably, during discharge, when the discharge current is less than the current limiting value, the battery outputs in a constant voltage mode, and when the discharge current reaches the current limiting value, the battery outputs in a current limiting mode.

[0069] In this embodiment, the current limiting value is preferably but not limited to being less than the rated discharge capacity of the battery, and may be the actual discharge capacity when the battery power is any value in the range of 20%-50% of the full power. When the discharge current is less than the current limiting value, it can be considered that the battery power is sufficient. When the discharge current reaches the current limiting value, it can be considered that the battery power is low. At this time, the current limiting mode is used for output, which can protect the battery from over-discharge.

[0070] The above technical solution realizes constant voltage output of parallel battery packs, reduces voltage fluctuations on the DC bus during backup power, outputs at a constant voltage first, and when the discharge current decreases to reach the current limiting value, the battery outputs in a current limiting manner, so that the battery power is completely discharged.

[0071] In this embodiment, preferably, when the battery outputs in a current limiting mode, if the battery voltage drops to a low voltage threshold, the battery discharge circuit is cut off and the battery discharge ends. The low voltage threshold can be preset according to the product information of the battery to protect the battery from over-discharge.

[0072] In a preferred embodiment, it also includes an intelligent power distribution unit, which adapts the electric energy of the DC bus to each load.

[0073] In this embodiment, the intelligent distribution unit is preferably but not limited to a remotely controllable load power supply or power-off switch, such as a DC switching circuit and a DC switching device including the switching circuit disclosed in Chinese patent publication number CN211015184U, which will not be described in detail here.

[0074] In a preferred embodiment, Figure 3 and Figure 4 As shown, the intelligent power distribution unit includes a base station power distribution unit, and at least one custom household selection unit is arranged between the base station power distribution unit and multiple power supply branches, and the custom household selection unit is connected to the monitoring communication network for communication; the custom household selection unit uses a software module to select any power supply branch from N power supply branches of the base station to form a household, N is a positive integer, the software module can independently control each power supply branch in the household, and the software module can also uniformly control all power supply branches in the household.

[0075] In this embodiment, if Figure 3 and Figure 4 As shown, the power supply branch obtains power from the base station power distribution unit (such as a switching power supply or a battery pack or a DC generator output end), and each power supply branch can be connected to at least one load device (such as Figure 3 and Figure 4 The load equipment preferably includes but is not limited to 2G load, 3G load, 4G load, 5G load and ordinary transmission load. Preferably, each power supply branch is connected to the same operator load.

[0076] In this embodiment, the software module selects any power supply branch according to the user's definition to form a sub-household, and the sub-household may include one or more power supply branches. For example, the power supply branches connected to the loads of the same operator can be formed into a sub-household, or the power supply branches of part of the loads under the same operator can be formed into a sub-household, such as 5G equipment as a sub-household, or the power supply branches of part of the loads of different operators can be formed into a sub-household, such as 5G equipment of all operators. It should be noted that the power supply branches in a sub-household can be physically adjacent (such as Figure 3 and Figure 4 The two devices may be physically located adjacent to each other (not shown).

[0077] In this embodiment, the software module can independently control each power supply branch in the sub-household, and each power supply branch is independently controlled. The software module can also uniformly control all power supply branches in the sub-household, such as all power supply branches in the sub-household are powered on or off at the same time. The software module is preferably, but not limited to, implemented using a processor such as a single-chip microcomputer, PLC or ARM.

[0078] In this embodiment, the existing fixed household division method in which each household is connected to the output end of the distribution unit by a mechanical switch or a DC contactor is abandoned. The custom household selection unit provided by the present invention can select any power supply branch from the N power supply branches of the base station according to user customization through a software module to form a household, and the power supply branches can be controlled independently, or the households can be controlled as controlled units in a unified manner. The household as a whole or the power supply branches can be independently controlled, metered, differentiated for backup and power generation, and output status locked and unlocked, thereby realizing dynamic custom household division, which can meet the differentiated needs of operators, refined management, and adapt to the needs of different application scenarios.

[0079] In this embodiment, preferably, Figure 3 and Figure 4 As shown, the custom household selection unit divides all the power supply branches of the base station into multiple households, and the software module includes multiple household units. One household corresponds to one household unit. The household unit can independently control each power supply branch in the household, or uniformly control all power supply branches in the household. Different power supply and power generation guarantee strategies can be adopted between each household. Specifically, for example, the custom power supply duration of each household can be different, whether each household has a backup power demand after the city power outage can be different, the backup power duration of each household can be different, and the power-off mode of each household (such as whether to use the secondary power-off mode) can also be different. The above technical solution: multiple households are formed, and different power supply and backup power guarantee strategies can be adopted between each household. Each household is independently controlled by the corresponding household unit, and each power supply branch in each household can be independently controlled or the entire household can be uniformly controlled as a controlled unit. At the same time, it is convenient for household metering, and further realizes refined management.

[0080] In this embodiment, preferably, Figure 4 As shown, a first control switch corresponding to each sub-household unit is arranged inside or outside the custom sub-household selection unit, and the first control switch is connected to all power supply branches in the household. The sub-household unit outputs an on-off control signal to the control end of the first control switch to realize unified control of the power supply branches in the corresponding sub-household. The above technical solution realizes unified control of all power supply branches in the sub-household as a whole.

[0081] In this embodiment, each household corresponds to a first control switch K1. Figure 4As shown, the first end of the first control switch K1 is connected to the output end of the base station power distribution unit, the second end of the first control switch K1 is connected to the power supply branch in the corresponding sub-household, and the on-off control end of the first control switch K1 is connected to the unified control signal output end of the sub-household unit of the corresponding sub-household. The first control switch K1 is preferably but not limited to an electrically controlled contactor. The corresponding sub-household unit realizes unified power-on or power-off control of the sub-household by controlling the conduction or disconnection of the first control switch K1. The first control switch K1 can be separated from the shell of the custom sub-household selection unit or integrated in the shell of the custom sub-household selection unit.

[0082] In this embodiment, if Figure 4 As shown, preferably, a corresponding second control switch K2 is provided on the power supply branch, and the household units are respectively connected to the control ends of the second control switch K2 on the household power supply branch, so as to realize independent control of the power supply branch in the corresponding household. The second control switch K2 can be the original control switch of the power supply branch, or it can be a newly added device. The second control switch K2 is preferably, but not limited to, an electrically controllable contactor. Figure 4 As shown, when the first control switch K1 corresponding to the sub-household unit control is turned on, the power supply branch can be independently controlled to be powered on or off by controlling the second control switch K2 of each power supply branch in the sub-household. When all the second control switches K2 in the sub-household are always turned on, unified control of all power supply branches in the sub-household can be achieved through the first control switch K1 corresponding to the sub-household.

[0083] In this embodiment, preferably, Figure 3 As shown, a one-to-one corresponding second control switch K2 is provided on the power supply branch, and the sub-household unit is respectively connected to the control end of the second control switch K2 on the power supply branch in the household, so as to realize unified control or independent control of the power supply branch in the corresponding sub-household. The second control switch K2 can be the original control switch of the power supply branch, or it can be a newly added device. The sub-household unit simultaneously controls the power supply or power off of all power supply branches in the sub-household to realize unified control, and can also individually control the power supply or power off of each power supply branch in the sub-household. The above technical solution: the power supply branch corresponds to the second control switch one by one, and at the same time realizes unified control or independent control of the power supply branches in the sub-household.

[0084] In this embodiment, preferably, the software module also includes a storage unit, which stores the equipment household information and the backup power information of each household, and the storage unit is connected to the household unit. The household unit reads the power supply branch information contained in the equipment household information corresponding to itself, and connects the control ends of the second control switch and the first control switch on the power supply branch according to the above information; the household unit reads the backup power information of its corresponding household, and controls the backup power supply duration of each power supply branch in the household according to the backup power information. The above technical solution: facilitates the household unit to divide and backup the power supply branches according to the stored load equipment household information and the backup power information of each household.

[0085] In this embodiment, preferably, it also includes an input unit for inputting household information and backup power information, and the input unit is connected to the software module. The input unit is preferably, but not limited to, a keyboard or a touch screen, and the input unit is connected to the household unit. The above technical solution is convenient for household division and backup power according to the household information and backup power information input by the user.

[0086] In this embodiment, preferably, a communication unit is also included, and the software module communicates with the monitoring center through the communication unit. The above technical solution facilitates the monitoring center to remotely control the sub-household and backup power. The communication unit is preferably, but not limited to, an existing wired communication module or a wireless communication module. The communication unit can be connected to the sub-household unit respectively.

[0087] In this embodiment, preferably, it also includes a branch information collection unit for collecting power supply information of power supply branches, and the branch information collection unit collects the power on and off time, power supply voltage, power supply current of each power supply branch, and collects or counts the power consumption of each power supply branch. The branch information collection unit collects the power on and off time, power supply voltage, power supply current, and cumulative power consumption of each power supply branch in real time and stores them for query, and / or the branch information collection unit uploads the collected information to the monitoring center through the communication unit to realize remote information collection. The above technical solution: It is possible to collect power supply information for each power supply branch and realize independent power metering of the power supply branches.

[0088] In this embodiment, preferably, it also includes a household information collection unit, which collects the power on and off time, power supply voltage, power supply current of each household, and counts the electricity consumption of each household. The household information collection unit can directly collect or count the power on and off time, power supply voltage, power supply current, and power consumption of the household, or it can obtain the power on and off time, power supply voltage, power supply current, and power consumption of the household based on the information output by the branch information collection unit in the household. The household information collection unit collects the power on and off time, power supply voltage, power supply current, and cumulative power consumption of each household in real time and stores them for query, and / or the household information collection unit uploads the collected information to the monitoring center through the communication unit to realize remote information collection. The above technical solution: It is possible to collect power supply information for each household and realize the overall electricity metering of the household.

[0089] In this embodiment, preferably, a branch locking unit corresponding to each power branch is further included, and the branch locking unit locks the output state of the corresponding power branch. When the device on the power branch is authorized, the power branch is unlocked to supply power to the device. When the device on the power branch is not authorized, the power branch continues to be locked and does not supply power to the device. The above technical solution realizes the independent locking and unlocking of the output state of each power branch.

[0090] In this embodiment, preferably, the branch locking unit includes an AND operation unit, which is arranged between the control end of the second control switch of the power supply branch and the control signal output end of the sub-household unit corresponding to the sub-household where the power supply branch is located. The control signal output end of the sub-household unit corresponds to the power supply branch in the sub-household one by one. The first input end of the AND operation unit is connected to the control signal output end of the sub-household unit, and the second input end of the AND operation unit inputs the authorization status information of the device on the power supply branch. When the device is authorized and the corresponding control signal output end on the sub-household unit outputs a high level, the AND operation unit outputs a high level to control the second control switch to turn on, so as to power the device on the power supply branch. Otherwise, the device is not powered. The authorization status information can be stored in the storage unit or obtained by inputting through the input unit or remotely sending from the monitoring center.

[0091] In this embodiment, preferably, it also includes a sub-household locking unit corresponding to each sub-household one by one, and the sub-household locking unit locks the output status of the corresponding sub-household. When all the devices in the sub-household are authorized, the sub-household is unlocked to supply power to the devices in the sub-household. When not all the devices on the sub-household are authorized, the sub-household continues to be locked and the devices in the sub-household are not supplied with power. The present invention also discloses an intelligent backup power control system for customized sub-households. In a preferred embodiment, at least one of the above-mentioned customized sub-household selection units and a monitoring center are provided between the base station power distribution unit and the multiple power supply branches, and the monitoring center is connected and communicated with the customized sub-household selection unit. The above-mentioned technical solution: realizes the overall locking and unlocking of the output status of the sub-household.

[0092] In this embodiment, the custom household selection unit receives household and backup power information from the monitoring center, and divides the power supply households according to the household information. Differentiated backup power can be provided for each household and each branch according to the backup power.

[0093] In this embodiment, preferably, when the number of custom household selection units is K, K custom household selection units are cascaded or set in parallel, and the power-off time of custom household selection units of different levels is different, and K is a positive integer greater than 1.

[0094] In this embodiment, the user-defined household selection unit can be cascaded up and down to form M layers, where M is a positive integer greater than 1. For example, in one application scenario, M and K are both 2. When a power-off is required, the first-layer user-defined household selection unit controls all the power supply branches connected to it for the first power-off, and the first-power-off device is powered off; when a second power-off is required, the second-layer user-defined household selection unit controls all the power supply branches connected to it for the second power-off, and the second-power-off device is powered off. In a preferred embodiment, the input end of the second-layer software module is connected to the power supply branch on / off signal output end of the first-layer software module, and the power-off status of the devices in other layers can be obtained.

[0095] In this embodiment, the customized household selection units can be set in parallel. In one application scenario, two customized household selection units are included. The first customized household selection unit divides and controls the primary power supply branch of the base station, and the second customized household selection unit divides and controls the secondary power supply branch of the base station. When the backup battery voltage reaches the primary power-off voltage, the first customized household selection unit cuts off power to the primary power supply branch it controls to complete the primary power-off. When the backup battery voltage reaches the secondary power-off voltage, the second customized household selection unit cuts off power to the secondary power supply branch it controls to complete the secondary power-off.

[0096] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0097] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A universally adaptable multi-module parallel power supply system, applied to a base station power supply system, characterized in that: It includes more than one rectifier branch connected in parallel to the DC busbar and connected to the AC input distribution unit, each rectifier branch is connected in series with a rectifier and an intelligent adapter, and when there are multiple rectifier branches, the manufacturers and models of the rectifiers are not completely the same or completely different; The intelligent adapter includes a collection module, a processing module and a DC / DC voltage conversion module. The input end of the DC / DC voltage conversion module is connected to the output end of the rectifier, the output end of the DC / DC voltage conversion module is connected to the DC bus, the control end of the DC / DC voltage conversion module is connected to the DC / DC control signal output end of the processing module, the collection module collects the voltage and / or current on the input line and / or output line of the DC / DC voltage conversion module, the output end of the collection module is connected to the information collection end of the processing module, and the processing module obtains the voltage and / or current information output by the collection module and adjusts the output voltage output by the DC / DC voltage conversion module; The smart adapter also includes a monitoring communication interface connected to the processing module, through which all smart adapters are connected to form a monitoring communication network, and the monitoring communication network can be connected and communicated with the host computer; By coordinating the work between the intelligent adapters of the monitoring communication network, the voltage and / or current of the rectifier branch entering the DC bus is adjusted to achieve current sharing management of the rectifier branch; All or part of the rectifier is an old rectifier; all or part of the old rectifier comes from an idle and old switching power supply system to be scrapped, and the age, model and capacity of the old switching power supply system are the same, not completely the same or completely different.

2. The universally adaptable multi-module parallel power supply system according to claim 1, characterized in that: A plurality of the universally adaptable multi-module parallel power supply systems can be cascaded to form a power supply system with a larger capacity.

3. The universally adaptable multi-module parallel power supply system according to claim 1, characterized in that: The smart adapter also includes an alarm module, and the processing module determines whether the voltage and / or current output by the acquisition module is within a safe range. If not, the alarm module is activated and / or an alarm signal is reported through a monitoring communication network.

4. The universally adaptable multi-module parallel power supply system according to claim 1, characterized in that: It also includes a charge and discharge management system, which manages the charge and discharge of multiple batteries connected to the DC bus, and the charge and discharge management system is connected to the monitoring communication network through the communication interface; And / or configure a battery current collector at the battery bus terminal, and set the maximum charging voltage and maximum charging current of the battery connected to the battery DC bus terminal through the processing module of the intelligent adapter.

5. The universally adaptable multi-module parallel power supply system according to claim 4, characterized in that: The charge and discharge management system includes a plurality of batteries connected in parallel and an electrical signal sampling unit, wherein the input end of the electrical signal sampling unit is respectively connected to the power ports of all the batteries, and the power ports of the batteries are connected to the DC bus; and also includes a plurality of battery charge and discharge management modules corresponding to the batteries one by one, wherein the battery charge and discharge management modules include a boost unit, a discharge current limiting unit, a charge current limiting unit, a switching switch, a fourth switch, and a management unit; The switching switch includes a moving contact and three static contacts, the power port of the battery is connected to the moving contact of the switching switch, the first static contact of the switching switch is connected to the DC bus through the discharge current limiting unit and the boost unit in sequence, the fourth switch is connected in parallel with the boost unit, the second static contact of the switching switch is connected to the DC bus through the charging current unit, and the third static contact of the switching switch is suspended; The information acquisition end of the management unit is connected to the output end of the electrical signal sampling unit, the first control end of the management unit is connected to the control end of the switching switch, the second control end of the management unit is connected to the control end of the fourth switch, the third control end of the management unit is connected to the control end of the discharge current limiting unit, and the fourth control end of the management unit is connected to the control end of the charge current limiting unit. All management units are connected to the monitoring communication network through the communication interface, and the batteries are charged and discharged collaboratively through the monitoring communication network.

6. The universally adaptable multi-module parallel power supply system according to claim 1, characterized in that: It also includes an intelligent power distribution unit, which adapts the electric energy of the DC bus to each load.

7. The universally adaptable multi-module parallel power supply system according to claim 6, characterized in that: The intelligent power distribution unit includes a base station power distribution unit, and at least one custom household selection unit is arranged between the base station power distribution unit and a plurality of power supply branches, and the custom household selection unit is connected to the monitoring communication network for communication; The custom household selection unit uses a software module to select any power supply branch from the N power supply branches of the base station to form a household, N is a positive integer, and the software module can independently control each power supply branch in the household, and the software module can also uniformly control all power supply branches in the household.

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