Access network machine room important load power supply guarantee system and method

Abstract

The invention discloses an access network machine room important load power supply guarantee system and method. The system comprises a base station standby power battery pack, a secondary power-off switch, a primary power-off switch, an important service standby power guarantee controller and a special standby power battery pack. The base station standby power battery pack is connected with the bus, the secondary power-off switch and the primary power-off switch are arranged on the bus, the wireless device is connected with the rear end of the primary power-off switch, the general transmission device is connected with the rear end of the secondary power-off switch, and the important service standby power guarantee controller is connected with the rear end of the secondary power-off switch. The rear end of the important service standby power guarantee controller is connected with the special standby power battery pack, and the important service standby power guarantee controller is connected with the important load. According to the technical scheme, the important service standby power guarantee controller and other devices are utilized, charging and discharging control of the base station standby power battery pack is achieved, and it is guaranteed that the important load is not powered off.

Description

Technical Field

[0001] The invention belongs to the technical field of power supply guarantee, and relates to a power supply guarantee system and method for important loads in an access network room. Background Art

[0002] With the development of communication technology, the number of 5G base stations is increasing. Due to the high energy consumption characteristics of 5G equipment, the original switching power supply and battery configuration of communication base stations can no longer meet the power supply requirements for the joint operation of new 5G equipment and original 3G and 4G equipment.

[0003] The existing communication base station switch power cabinet power supply system is an uninterruptible power supply system, which will only be shut down for protection after the city power outage and when the backup battery is exhausted. In the event of a city power outage, the power supply time of the backup battery will be seriously shortened due to the high power consumption of 5G equipment, causing power outages in the entire station, and it is also very easy to cause battery power supply damage. In this case, if a set of batteries is specially equipped for 5G equipment, a corresponding switch power supply system needs to be added to manage the charging and discharging of the batteries. If the switch power supply system is not added and the original power cabinet is still used for management, the newly added battery will still not work due to the high power consumption characteristics of 5G. If a power cabinet is added, the cost of equipment room construction will be greatly increased, which will overwhelm the operator.

[0004] In the prior art, patent 202121823182.4 discloses a dedicated backup battery pack management system for communication base station 5G equipment, including a switching power supply cabinet, the switching power supply cabinet is connected to a first battery and a micro control unit, the micro control unit is connected to an FSU module and a second battery pack, and the FSU module is connected to a load. The system is specially equipped with a second battery pack for 5G load equipment. The second battery pack is connected to the micro control unit and can be used as a backup power supply for the FSU module and the 5G load, without the need to add a corresponding switching power supply system to manage the charging and discharging of the battery. However, the system only performs unified charging and discharging management of the battery, and does not control the charging and discharging of important loads, and cannot guarantee the power consumption of important loads. Summary of the invention

[0005] The object of the present invention is to provide a system and method for ensuring power supply for important loads in an access network room, so as to solve the problem that power supply for important loads cannot be guaranteed.

[0006] In order to achieve the above object, the basic scheme of the present invention is: a power supply guarantee system for important loads in an access network room, adopting one of the following schemes:

[0007] Solution 1: includes a base station backup battery pack, a secondary power-off switch, a primary power-off switch, an important business backup power protection controller, and a dedicated backup battery pack;

[0008] The base station backup battery pack is connected to the bus of the base station switch power supply, and the secondary power-off switch and the primary power-off switch are sequentially arranged on the bus of the base station switch power supply, and the secondary power-off switch and the primary power-off switch are located at the rear end of the connection between the base station backup battery pack and the base station switch power supply bus;

[0009] The wireless device is connected to the rear end of the primary power-off switch;

[0010] The general transmission equipment is connected to the back end of the secondary power-off switch;

[0011] The important business backup power protection controller is connected to the rear end of the secondary power-off switch, the rear end of the important business backup power protection controller is connected to a dedicated backup battery pack, and the important business backup power protection controller is connected to important loads;

[0012] Option 2:

[0013] It includes a base station backup battery pack, a secondary power-off switch, a primary power-off switch, a dedicated backup battery pack charger, a first switch, a second switch, a third switch, a control module and a dedicated backup battery pack;

[0014] The base station backup battery pack and the dedicated backup battery pack charger are both connected to the busbar of the base station switching power supply, the secondary power-off switch and the primary power-off switch are sequentially arranged on the busbar of the base station switching power supply, the secondary power-off switch is located at the rear end of the connection between the base station backup battery pack and the base station switching power supply busbar, the primary power-off switch is located at the rear end of the connection between the dedicated backup battery pack charger and the busbar, the wireless device is connected to the rear end of the primary power-off switch, and the general transmission device is connected to the rear end of the secondary power-off switch;

[0015] One end of the controlled path of the first switch is connected between the primary power-off switch and the secondary power-off switch, and the other end is connected to an important load;

[0016] The control ends of the dedicated backup battery charger, the first switch, the second switch, and the third switch are all connected to the control module, and the dedicated backup battery charger is connected to the charging end of the dedicated backup battery;

[0017] The dedicated backup battery pack is connected to the important load via a third switch and a second switch connected in series, and the switching directions of the third switch and the second switch are opposite;

[0018] Solution 3: includes a base station backup battery pack, a secondary power-off switch, a primary power-off switch, a dedicated backup battery pack charger, a step-down output module, a control module, a control switch and a dedicated backup battery pack;

[0019] The base station backup battery pack, the dedicated backup battery pack charger and the step-down output module are all connected to the bus of the base station switching power supply. The secondary power-off switch and the primary power-off switch are sequentially arranged on the bus of the base station switching power supply. The secondary power-off switch is located at the rear end of the connection between the base station backup battery pack and the base station switching power supply bus. The primary power-off switch is located at the rear end of the connection between the dedicated backup battery pack charger and the bus. The wireless device is connected to the rear end of the primary power-off switch, and the general transmission device is connected to the rear end of the secondary power-off switch.

[0020] The dedicated backup battery charger, control module and buck output module are connected in sequence, the front end of the controlled path of the control switch is connected between the primary power-off switch and the secondary power-off switch, and the rear end is connected to the important load, the dedicated backup battery charger is connected to the front end of the controlled path of the control switch, and the buck output module is connected to the rear end of the controlled path of the control switch;

[0021] The control module is connected to the control end of the control switch, the dedicated backup battery pack is connected to the dedicated backup battery pack charger and the buck output module respectively, and the buck output module is connected to an important load.

[0022] The working principle and beneficial effects of this basic solution are as follows: This technical solution uses a secondary power-off switch, a primary power-off switch, and an important business backup power protection controller to charge the base station backup battery pack, charge the dedicated backup battery pack, and supply power to important load equipment at the base station. When necessary, the secondary power-off switch and the primary power-off switch are controlled to open and close to control the charging and discharging of the battery pack and to supply power to ordinary equipment and important equipment. The dedicated backup battery pack can automatically continue to discharge to important loads with zero switching through the backup power protection controller, ensuring that important loads are powered without zero switching.

[0023] Furthermore, in scheme 1, when there is power from the mains outside the base station and the current carrying capacity of the rectifier module is sufficient, and the voltage at the DC bus terminal maintains an upward trend or remains unchanged, the base station switching power supply charges the base station backup battery pack normally;

[0024] The secondary power-off switch is closed to supply power to general transmission equipment, and to charge the dedicated backup battery pack through the important business backup power guarantee controller, while supplying power to important loads of the base station;

[0025] Once the power-down switch is closed, power is supplied to the wireless device.

[0026] When there is power from the mains, it can supply power to wireless devices, general transmission equipment and important loads of the base station, and charge the base station backup battery pack and special backup battery pack.

[0027] The external mains current detection unit is used to detect the incoming call information, and the opening and closing of the power-off switch is controlled by the controller, which is easy to operate.

[0028] Furthermore, the important business backup power protection controller includes a 48V DC-DC module, and the 48V DC-DC module is connected to a dedicated backup battery pack.

[0029] The 48V DC-DC module has a simple structure and is easy to use.

[0030] Furthermore, the important business backup power protection controller includes a 48V DC-DC module, a battery charge and discharge management module, a power distribution output switch and a monitoring display unit;

[0031] The 48V DC-DC module is connected to a dedicated backup battery pack, the battery charge and discharge management module controls the charge and discharge of the dedicated backup battery pack, the 48V DC-DC module is connected to important loads through a power distribution output switch, and the monitoring and display unit is respectively connected to the 48V DC-DCC module, the battery charge and discharge management module and the power distribution output switch.

[0032] The 48V buck-boost DCDC module, battery charge and discharge management module, and power distribution output switch are used to control the charge and discharge of the dedicated backup battery pack, which is convenient for operation, and the operation signals and data are displayed through the monitoring display unit.

[0033] Furthermore, the important business backup power guarantee controller configures load distribution branches of appropriate capacity and quantity according to the power of the load equipment, and configures multiple (4 to 6) output branches to meet the main and backup power supply of multiple (2 to 3) important optical devices.

[0034] The important business backup power guarantee controller has a simple structure and meets the usage requirements.

[0035] Furthermore, the important business backup power protection controller and the dedicated backup battery are configured separately and independently, or the backup power protection controller and the dedicated backup battery group are configured in an integrated manner.

[0036] The installation structure of the important business backup power guarantee controller and the dedicated backup battery is simple and easy to use.

[0037] The present invention also provides a method for ensuring power supply to important loads in an access network room of the system of the present invention. In scheme 1, in the initial stage after a power outage outside the base station, the backup battery pack of the base station discharges to general transmission equipment and wireless equipment, and discharges to important loads through a backup power guarantee controller;

[0038] When the mains power supply outside the base station is cut off for a long time, after the base station backup battery pack is discharged for protection (the primary power-off switch and the secondary power-off switch are turned off successively), the dedicated backup battery pack will automatically continue to discharge to the important loads through the zero switching of the backup power guarantee controller, ensuring that the important loads are powered on without interruption during zero switching;

[0039] In the second solution, when the switching power supply outputs normally, the dedicated backup battery charger starts to charge the dedicated backup battery, the first switch is turned on to supply power to the load, and the second switch is turned off to prevent the dedicated backup battery from discharging externally, and the third switch is turned off to prevent the switching power supply from directly charging the dedicated backup battery;

[0040] When the switch power supply has no output, the base station backup battery pack is used for backup power. The control module detects the input voltage drop, stops the dedicated backup battery pack charger from charging the dedicated backup battery pack, opens the first switch to continue to supply power to the load, and closes the second switch to prevent the dedicated battery from discharging externally, closes the third switch to prevent the switch power supply from directly charging the dedicated backup battery pack, and gives priority to using the base station backup battery pack for backup power;

[0041] When the backup battery pack of the base station is exhausted or powered off for the second time, the control module detects that the input voltage is abnormal or reaches the set value, stops the dedicated backup battery pack charger from charging the dedicated backup battery pack, closes the first switch to prevent the current from flowing back to other loads, and opens the second and third switches at the same time, and the dedicated backup battery pack supplies power to the load until the dedicated backup battery pack is discharged or meets the intelligent power distribution backup power shutdown strategy or the next call is received, and the cycle is carried out;

[0042] In solution three, when the switching power supply is outputting normally, the dedicated backup battery pack charger starts to charge the dedicated backup battery pack, the control switch is turned on to supply power to the load, and the output voltage of the step-down output module is consistent with the low-voltage protection value of the base station backup battery pack. After the switching power supply input is interrupted, the step-down output module can continue to output voltage to supply power to the load. At this time, the step-down output module acts as a backup to prevent the load from being powered off due to power input interruption;

[0043] When the switch power supply has no output, the base station backup battery pack is used for backup power. The control module detects the input voltage drop, stops the dedicated backup battery pack charger from charging the dedicated backup battery pack, and turns on the control switch to continue to supply power to the load. The base station backup battery pack is used for backup power first. The output voltage of the step-down output module is consistent with the low-voltage protection value of the base station backup battery pack. After the base station backup battery pack is low-voltage or interrupted, the step-down output module can continue to output voltage to supply power to the load. At this time, the step-down output module acts as a backup to prevent the load from being powered off due to power input interruption;

[0044] When the base station backup battery pack is exhausted or powered off for the second time, the control module detects that the input voltage is abnormal or reaches the set value, and continues to stop the dedicated backup battery pack charger from charging the dedicated backup battery pack. The control switch is turned off to prevent current from flowing back to power other loads. The output voltage of the step-down output module is consistent with the low-voltage protection of the base station backup battery pack, and the load is powered until the dedicated backup battery pack is discharged or the intelligent power distribution backup power shutdown strategy is met or the next call is received, and the cycle is carried out.

[0045] Combining the base station backup battery pack and the dedicated backup battery pack, when the mains power outage occurs outside the base station, it ensures that important loads can be switched without power outage.

[0046] Furthermore, when the DC bus of the base station switching power supply is powered, the 48V DC-DC module works normally and outputs power;

[0047] The 48V DC-DC module charges the dedicated backup battery pack. During the charging process, if the voltage of the DC bus of the base station switching power supply is lower than the voltage of the dedicated backup battery pack, the 48V DC-DC module will boost the voltage to charge the dedicated backup battery pack; if the voltage of the DC bus of the base station switching power supply is higher than the voltage of the dedicated backup battery pack, the 48V DC-DC module will step down the voltage to charge the dedicated backup battery pack.

[0048] The 48V DC-DC module charges the dedicated backup battery pack at a constant current, and when the battery is almost full, it switches to constant voltage charging and maintains the current voltage output to power important loads.

[0049] The 48V DC-DC module is used to control the charging and discharging of the dedicated backup battery pack, which is easy to operate.

[0050] Furthermore, when the city power fails, the base station switch power supply stops working and has no output voltage, the base station backup battery pack starts to discharge, and the 48V DC-DC module continues to maintain the voltage output when it is fully charged. The base station backup battery pack is discharged first, and the dedicated backup battery pack is not discharged;

[0051] As the discharge time increases, the voltage of the base station backup battery pack begins to drop. When the voltage of the base station backup battery pack drops to the stop setting voltage value of the 48V DC-DC module or the secondary power-off occurs, the 48V DC-DC module stops working and the dedicated backup battery pack starts to discharge until the dedicated backup battery pack finishes discharging or meets the distribution backup power shutdown strategy or the next mains power is received, the cycle continues.

[0052] When the city power fails, the 48V DC-DC module combines with the base station backup battery pack to control the discharge operation of the dedicated backup battery pack.

[0053] Furthermore, various parameters of the equalizing floating charge management are set for the dedicated backup battery pack as needed through the backup power guarantee controller.

[0054] The operation is simple, easy to set parameters, and meets the needs of different settings. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a structural diagram of the scheme 1 of the important load power supply guarantee system of the access network room of the present invention;

[0056] Figure 2It is a structural schematic diagram of an optimal important business backup power guarantee controller of an important load power supply guarantee system of an access network room of the present invention;

[0057] Figure 3 It is a structural schematic diagram of another preferred important business backup power guarantee controller of the important load power supply guarantee system of the access network room of the present invention;

[0058] Figure 4 It is a structural schematic diagram of the scheme 2 of the important load power supply guarantee system of the access network room of the present invention;

[0059] Figure 5 It is a structural diagram of solution 3 of the important load power supply guarantee system of the access network room of the present invention. DETAILED DESCRIPTION

[0060] 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.

[0061] 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.

[0062] 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.

[0063] The present invention discloses a power supply guarantee system for important loads in an access network room, which adopts one of the following schemes:

[0064] like Figure 1 As shown, solution one includes a base station backup battery pack, a secondary power-off switch, a primary power-off switch, an important business backup power protection controller, and a dedicated backup battery pack.

[0065] The base station backup battery pack is electrically connected to the busbar of the base station switching power supply. The secondary power-off switch and the primary power-off switch are sequentially arranged on the busbar of the base station switching power supply. The secondary power-off switch and the primary power-off switch are located at the rear end of the connection between the base station backup battery pack and the busbar of the base station switching power supply.

[0066] The wireless device is electrically connected to the rear end of the primary power-off switch, and the general transmission device is electrically connected to the rear end of the secondary power-off switch.

[0067] The important business backup power protection controller is electrically connected to the back end of the secondary power-off switch, the back end of the important business backup power protection controller is electrically connected to the dedicated backup battery pack, and the important business backup power protection controller is electrically connected to important loads (such as OLT / switch / important transmission equipment).

[0068] like Figure 4 As shown, Solution 2 includes a base station backup battery pack, a secondary power-off switch, a primary power-off switch, a dedicated backup battery pack charger (dedicated battery charger), a first switch (Q1), a second switch (Q2), a third switch (Q3), a control module and a dedicated backup battery pack (dedicated battery).

[0069] The base station backup battery pack and the dedicated backup battery pack charger are both electrically connected to the bus of the base station switching power supply. The secondary power-off switch and the primary power-off switch are sequentially arranged on the bus of the base station switching power supply. The secondary power-off switch is located at the rear end of the connection between the base station backup battery pack and the base station switching power supply bus. The primary power-off switch is located at the rear end of the connection between the dedicated backup battery pack charger and the bus. The wireless device is electrically connected to the rear end of the primary power-off switch, and the general transmission device is electrically connected to the rear end of the secondary power-off switch.

[0070] One end of the controlled path of the first switch is connected between the primary power-off switch and the secondary power-off switch, and the other end is connected to the important load. The control ends of the dedicated backup battery charger, the first switch, the second switch, and the third switch are all connected to the control module, and the dedicated backup battery charger is electrically connected to the charging end of the dedicated backup battery.

[0071] The dedicated backup battery pack is electrically connected to the base station load via a third switch and a second switch connected in series, and the switching directions of the third switch and the second switch are opposite.

[0072] like Figure 5 As shown, solution three includes a base station backup battery pack, a secondary power-off switch, a primary power-off switch, a dedicated backup battery pack charger, a step-down output module (i.e., a 48V DC-DC module), a control module, a control switch (Q1), and a dedicated backup battery pack.

[0073] The base station backup battery pack, the dedicated backup battery pack charger and the step-down output module are all electrically connected to the bus of the base station switching power supply. The secondary power-off switch and the primary power-off switch are sequentially arranged on the bus of the base station switching power supply. The secondary power-off switch is located at the rear end of the connection between the base station backup battery pack and the base station switching power supply bus. The primary power-off switch is located at the rear end of the connection between the dedicated backup battery pack charger and the bus. The wireless device is connected to the rear end of the primary power-off switch, and the general transmission equipment is connected to the rear end of the secondary power-off switch.

[0074] The dedicated backup battery pack charger, control module and step-down output module are electrically connected in sequence. The front end of the controlled path of the control switch is connected between the primary power-off switch and the secondary power-off switch, and the rear end is connected to the important load. The dedicated backup battery pack charger is connected to the front end of the controlled path of the control switch, and the step-down output module is connected to the rear end of the controlled path of the control switch.

[0075] The control module is electrically connected to the control end of the control switch, the dedicated backup battery pack is electrically connected to the dedicated backup battery pack charger and the step-down output module respectively, and the step-down output module is electrically connected to the base station load.

[0076] In a preferred solution of the present invention, in Solution 1, when there is power from the mains outside the base station and the current carrying capacity of the rectifier module is sufficient, and the voltage at the DC bus terminal maintains an upward trend or remains unchanged, the base station switch power supply charges the base station backup battery pack normally;

[0077] The secondary power-off switch is closed to supply power to general transmission equipment, and charges the dedicated backup battery pack (dedicated backup battery pack) through the important business backup power guarantee controller, while supplying power to important loads of the base station. The primary power-off switch is closed to supply power to wireless equipment.

[0078] In a preferred embodiment of the present invention, Figure 2 As shown, the important business backup power protection controller includes a 48V DC-DC module, and the 48V DC-DC module is electrically connected to a dedicated backup battery pack.

[0079] In another preferred embodiment of the present invention, Figure 3 As shown, the important business backup power protection controller includes a 48V DC-DC module, a battery charge and discharge management module, a power distribution output switch and a monitoring display unit.

[0080] The 48V DC-DC module is electrically connected to the dedicated backup battery pack, the battery charge and discharge management module controls the charging and discharging of the dedicated backup battery pack, the 48V DC-DC module is electrically connected to the important load through the power distribution output switch, and the monitoring and display unit is electrically connected to the 48V DC-DCC module, the battery charge and discharge management module and the power distribution output switch respectively.

[0081] The 48V buck-boost DCDC module, battery charge and discharge management module, and power distribution output switch are used to control the charge and discharge of the dedicated backup battery pack, which is convenient for operation, and the operation signals and data are displayed through the monitoring display unit.

[0082] In a preferred solution of the present invention, the important business backup power protection controller must be configured with a load distribution branch of appropriate capacity and quantity according to the power of the load equipment, and multiple (4 to 6) output branches must be configured to meet the main and backup power supply of multiple (2 to 3) important optical devices. The important business backup power protection controller must be designed according to the power of the load equipment protected by the back end, and configured with a load distribution branch of appropriate capacity and quantity.

[0083] In a preferred solution of the present invention, the important business backup power protection controller and the dedicated backup battery are configured separately or the backup power protection controller and the dedicated backup battery are configured in an integrated manner. The installation structure of the important business backup power protection controller and the dedicated backup battery is simple and easy to use.

[0084] When the dedicated backup battery pack adopts a lead-acid battery pack, it is necessary to design the important business backup power protection controller independently and separate the controller and the battery pack; when the dedicated backup battery pack adopts a lithium iron phosphate battery pack, the important business backup power protection controller and the battery pack can be designed as an integrated whole.

[0085] The present invention also provides a method for ensuring power supply to important loads in an access network room of the system described in the present invention. In scheme 1, in the initial stage after a power outage outside the base station, the base station backup battery pack discharges to general transmission equipment and wireless equipment, and discharges to important loads through a backup power guarantee controller.

[0086] When the mains power supply outside the base station is cut off for a long time and the base station backup battery pack is discharged for protection (the primary power-off switch and the secondary power-off switch are turned off successively), the dedicated backup battery pack will automatically continue to discharge to the important loads through zero switching of the backup power guarantee controller, ensuring that the important loads are powered on without interruption until the dedicated backup battery pack is deeply discharged for protection.

[0087] In the second solution, when the switching power supply outputs normally, the dedicated backup battery charger starts to charge the dedicated backup battery, the first switch is turned on to supply power to the load, and the second switch is turned off to prevent the dedicated backup battery from discharging externally, and the third switch is turned off to prevent the switching power supply from directly charging the dedicated backup battery;

[0088] When the switch power supply has no output, the base station backup battery pack is used for backup power. The control module detects the input voltage drop, stops the dedicated backup battery pack charger from charging the dedicated backup battery pack, opens the first switch to continue to supply power to the load, and closes the second switch to prevent the dedicated battery from discharging externally, closes the third switch to prevent the switch power supply from directly charging the dedicated backup battery pack, and gives priority to using the base station backup battery pack for backup power;

[0089] When the backup battery pack of the base station is exhausted or powered off for the second time, the control module detects that the input voltage is abnormal or reaches the set value, stops the dedicated backup battery pack charger from charging the dedicated backup battery pack, closes the first switch to prevent the current from flowing back to other loads, and opens the second and third switches at the same time, and the dedicated backup battery pack supplies power to the load until the dedicated backup battery pack is discharged or meets the intelligent power distribution backup power shutdown strategy or the next call is received, and the cycle is carried out;

[0090] In solution three, when the switching power supply is outputting normally, the dedicated backup battery pack charger starts to charge the dedicated backup battery pack, the control switch is turned on to supply power to the load, and the output voltage of the step-down output module is consistent with the low-voltage protection value of the base station backup battery pack. After the switching power supply input is interrupted, the step-down output module can continue to output voltage to supply power to the load. At this time, the step-down output module acts as a backup to prevent the load from being powered off due to power input interruption;

[0091] When the switch power supply has no output, the base station backup battery pack is used for backup power. The control module detects the input voltage drop, stops the dedicated backup battery pack charger from charging the dedicated backup battery pack, and turns on the control switch to continue to supply power to the load. The base station backup battery pack is used for backup power first. The output voltage of the step-down output module is consistent with the low-voltage protection value of the base station backup battery pack. After the base station backup battery pack is low-voltage or interrupted, the step-down output module can continue to output voltage to supply power to the load. At this time, the step-down output module acts as a backup to prevent the load from being powered off due to power input interruption;

[0092] When the base station backup battery pack is exhausted or powered off for the second time, the control module detects that the input voltage is abnormal or reaches the set value, and continues to stop the dedicated backup battery pack charger from charging the dedicated backup battery pack. The control switch is turned off to prevent current from flowing back to power other loads. The output voltage of the step-down output module is consistent with the low-voltage protection of the base station backup battery pack, and the load is powered until the dedicated backup battery pack is discharged or the intelligent power distribution backup power shutdown strategy is met or the next call is received, and the cycle is carried out.

[0093] In a preferred solution of the present invention, when the DC bus of the base station switching power supply is powered, the 48V DC-DC module works normally and outputs power.

[0094] The 48V DC-DC module charges the dedicated backup battery pack. During the charging process, if the voltage of the DC bus of the base station switching power supply is lower than the voltage of the dedicated backup battery pack, the 48V DC-DC module will boost the voltage to charge the dedicated backup battery pack; if the voltage of the DC bus of the base station switching power supply is higher than the voltage of the dedicated backup battery pack, the 48V DC-DC module will step down the voltage to charge the dedicated backup battery pack.

[0095] The 48V DC-DC module charges the dedicated backup battery pack at a constant current, and when the battery is almost full, it switches to constant voltage charging and maintains the current voltage output to power important loads.

[0096] In a preferred embodiment of the present invention, when the city power fails, the base station switch power supply stops working and has no output voltage, the base station backup battery pack starts to discharge, the 48V DC-DC module continues to maintain the voltage output when it is fully charged, the base station backup battery pack is discharged first, and the dedicated backup battery pack is not discharged;

[0097] As the discharge time increases, the voltage of the base station backup battery pack begins to drop. When the voltage of the base station backup battery pack drops to the stop setting voltage value of the 48V DC-DC module or the secondary power-off occurs, the 48V DC-DC module stops working and the dedicated backup battery pack starts to discharge until the dedicated backup battery pack finishes discharging or meets the distribution backup power shutdown strategy or the next mains power is received, the cycle continues.

[0098] Preferably, the backup power guarantee controller sets various parameters of equalizing and floating charge management for the dedicated backup battery pack as needed. Equalizing charge parameters: equalizing charge voltage, equalizing charge current, equalizing charge time, equalizing charge cycle; floating charge: floating charge voltage, floating charge current, floating charge time, temperature compensation, etc.

[0099] 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.

[0100] 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 power supply guarantee system for important loads in an access network room, characterized in that: Use one of the following options: Solution 1: includes a base station backup battery pack, a secondary power-off switch, a primary power-off switch, an important business backup power protection controller, and a dedicated backup battery pack; The base station backup battery pack is connected to the bus of the base station switch power supply, and the secondary power-off switch and the primary power-off switch are sequentially arranged on the bus of the base station switch power supply, and the secondary power-off switch and the primary power-off switch are located at the rear end of the connection between the base station backup battery pack and the base station switch power supply bus; The wireless device is connected to the rear end of the primary power-off switch; The general transmission equipment is connected to the back end of the secondary power-off switch; The important business backup power protection controller is connected to the rear end of the secondary power-off switch, the rear end of the important business backup power protection controller is connected to a dedicated backup battery pack, and the important business backup power protection controller is connected to important loads; Solution 2: including a base station backup battery pack, a secondary power-off switch, a primary power-off switch, a dedicated backup battery pack charger, a first switch, a second switch, a third switch, a control module and a dedicated backup battery pack; The base station backup battery pack and the dedicated backup battery pack charger are both connected to the busbar of the base station switching power supply, the secondary power-off switch and the primary power-off switch are sequentially arranged on the busbar of the base station switching power supply, the secondary power-off switch is located at the rear end of the connection between the base station backup battery pack and the base station switching power supply busbar, the primary power-off switch is located at the rear end of the connection between the dedicated backup battery pack charger and the busbar, the wireless device is connected to the rear end of the primary power-off switch, and the general transmission device is connected to the rear end of the secondary power-off switch; One end of the controlled path of the first switch is connected between the primary power-off switch and the secondary power-off switch, and the other end is connected to an important load; The control ends of the dedicated backup battery charger, the first switch, the second switch, and the third switch are all connected to the control module, and the dedicated backup battery charger is connected to the charging end of the dedicated backup battery; The dedicated backup battery pack is connected to the important load via a third switch and a second switch connected in series, and the switching directions of the third switch and the second switch are opposite; Solution 3: includes a base station backup battery pack, a secondary power-off switch, a primary power-off switch, a dedicated backup battery pack charger, a step-down output module, a control module, a control switch and a dedicated backup battery pack; The base station backup battery pack, the dedicated backup battery pack charger and the step-down output module are all connected to the bus of the base station switching power supply. The secondary power-off switch and the primary power-off switch are sequentially arranged on the bus of the base station switching power supply. The secondary power-off switch is located at the rear end of the connection between the base station backup battery pack and the base station switching power supply bus. The primary power-off switch is located at the rear end of the connection between the dedicated backup battery pack charger and the bus. The wireless device is connected to the rear end of the primary power-off switch, and the general transmission device is connected to the rear end of the secondary power-off switch. The dedicated backup battery charger, control module and buck output module are connected in sequence, the front end of the controlled path of the control switch is connected between the primary power-off switch and the secondary power-off switch, and the rear end is connected to the important load, the dedicated backup battery charger is connected to the front end of the controlled path of the control switch, and the buck output module is connected to the rear end of the controlled path of the control switch; The control module is connected to the control end of the control switch, the dedicated backup battery pack is connected to the dedicated backup battery pack charger and the buck output module respectively, and the buck output module is connected to an important load.

2. The important load power supply guarantee system of the access network room according to claim 1, characterized in that: In solution 1, when there is power from the mains outside the base station and the current carrying capacity of the rectifier module is sufficient, and the voltage at the DC bus terminal keeps an upward trend or remains unchanged, the base station switching power supply charges the base station backup battery pack normally; The secondary power-off switch is closed to supply power to general transmission equipment, and to charge the dedicated backup battery pack through the important business backup power guarantee controller, while supplying power to important loads of the base station; Once the power-down switch is closed, power is supplied to the wireless device.

3. The important load power supply guarantee system of the access network room according to claim 2, characterized in that: The important business backup power guarantee controller includes a 48V DC-DC module, and the 48V DC-DC module is connected to a dedicated backup battery pack.

4. The important load power supply guarantee system of the access network room according to claim 2, characterized in that: The important business backup power protection controller includes a 48V DC-DC module, a battery charge and discharge management module, a power distribution output switch and a monitoring display unit; The 48V DC-DC module is connected to a dedicated backup battery pack, the battery charge and discharge management module controls the charge and discharge of the dedicated backup battery pack, the 48V DC-DC module is connected to important loads through a power distribution output switch, and the monitoring and display unit is respectively connected to the 48V DC-DC module, the battery charge and discharge management module and the power distribution output switch.

5. The important load power supply guarantee system of the access network room according to claim 1, characterized in that: The backup power supply controller for important services configures load power distribution branches with appropriate capacity and quantity according to the power of the load equipment, and configures multiple output branches to meet the main and backup power supply of multiple important optical equipment.

6. The important load power supply guarantee system of the access network room according to claim 1, characterized in that: The important business backup power protection controller and the dedicated backup battery are configured separately, or the backup power protection controller and the dedicated backup battery group are configured in an integrated manner.

7. A method for ensuring power supply to important loads in an access network room of the system according to any one of claims 1 to 6, characterized in that: In scheme 1, in the initial stage after the mains power outage outside the base station, the base station backup battery pack discharges to general transmission equipment and wireless equipment, and discharges to important loads through the backup power protection controller; When the mains power supply outside the base station is cut off for a long time, after the base station backup battery pack is discharged for protection, the dedicated backup battery pack will automatically continue to discharge to the important loads through the zero switching of the backup power protection controller, ensuring that the important loads will not be disconnected from power supply after zero switching; In the second solution, when the switching power supply outputs normally, the dedicated backup battery charger starts to charge the dedicated backup battery, the first switch is turned on to supply power to the load, and the second switch is turned off to prevent the dedicated backup battery from discharging externally, and the third switch is turned off to prevent the switching power supply from directly charging the dedicated backup battery; When the switch power supply has no output, the base station backup battery pack is used for backup power. The control module detects the input voltage drop, stops the dedicated backup battery pack charger from charging the dedicated backup battery pack, opens the first switch to continue to supply power to the load, and closes the second switch to prevent the dedicated battery from discharging externally, closes the third switch to prevent the switch power supply from directly charging the dedicated backup battery pack, and gives priority to using the base station backup battery pack for backup power; When the backup battery pack of the base station is exhausted or powered off for the second time, the control module detects that the input voltage is abnormal or reaches the set value, stops the dedicated backup battery pack charger from charging the dedicated backup battery pack, closes the first switch to prevent the current from flowing back to other loads, and opens the second and third switches at the same time, and the dedicated backup battery pack supplies power to the load until the dedicated backup battery pack is discharged or meets the intelligent power distribution backup power shutdown strategy or the next call is received, and the cycle is carried out; In solution three, when the switching power supply is outputting normally, the dedicated backup battery pack charger starts to charge the dedicated backup battery pack, the control switch is turned on to supply power to the load, and the output voltage of the step-down output module is consistent with the low-voltage protection value of the base station backup battery pack. After the switching power supply input is interrupted, the step-down output module can continue to output voltage to supply power to the load. At this time, the step-down output module acts as a backup to prevent the load from being powered off due to power input interruption; When the switch power supply has no output, the base station backup battery pack is used for backup power. The control module detects the input voltage drop, stops the dedicated backup battery pack charger from charging the dedicated backup battery pack, and turns on the control switch to continue to supply power to the load. The base station backup battery pack is used for backup power first. The output voltage of the step-down output module is consistent with the low-voltage protection value of the base station backup battery pack. After the base station backup battery pack is low-voltage or interrupted, the step-down output module can continue to output voltage to supply power to the load. At this time, the step-down output module acts as a backup to prevent the load from being powered off due to power input interruption; When the base station backup battery pack is exhausted or powered off for the second time, the control module detects that the input voltage is abnormal or reaches the set value, and continues to stop the dedicated backup battery pack charger from charging the dedicated backup battery pack. The control switch is turned off to prevent current from flowing back to power other loads. The output voltage of the step-down output module is consistent with the low-voltage protection of the base station backup battery pack, and the load is powered until the dedicated backup battery pack is discharged or the intelligent power distribution backup power shutdown strategy is met or the next call is received, and the cycle is carried out.

8. The method for ensuring power supply to important loads in an access network room according to claim 7, characterized in that: When the DC bus of the base station switching power supply is powered, the 48V DC-DC module works normally and outputs power; The 48V DC-DC module charges the dedicated backup battery pack. During the charging process, if the voltage of the DC bus of the base station switching power supply is lower than the voltage of the dedicated backup battery pack, the 48V DC-DC module will boost the voltage to charge the dedicated backup battery pack; if the voltage of the DC bus of the base station switching power supply is higher than the voltage of the dedicated backup battery pack, the 48V DC-DC module will step down the voltage to charge the dedicated backup battery pack. The 48V DC-DC module charges the dedicated backup battery pack at a constant current, and when the battery is almost full, it switches to constant voltage charging and maintains the current voltage output to power important loads.

9. The method for ensuring power supply to important loads in an access network room according to claim 7, characterized in that: When the city power fails, the base station switch power supply stops working and has no output voltage. The base station backup battery pack starts to discharge, and the 48V DC-DC module continues to maintain the voltage output when it is fully charged. The base station backup battery pack is discharged first, and the dedicated backup battery pack is not discharged. As the discharge time increases, the voltage of the base station backup battery pack begins to drop. When the voltage of the base station backup battery pack drops to the stop setting voltage value of the 48V DC-DC module or the secondary power-off occurs, the 48V DC-DC module stops working and the dedicated backup battery pack starts to discharge until the dedicated backup battery pack finishes discharging or meets the distribution backup power shutdown strategy or the next mains power is received, the cycle continues.

10. The method for ensuring power supply to important loads in an access network room according to claim 7, characterized in that: The various parameters of floating charge management are set for the dedicated backup battery pack as needed through the backup power protection controller.

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