Method and system for automatically adjusting primary / secondary power-off parameters of base station switching power supply

Abstract

The invention belongs to the technical field of communication base stations, and particularly discloses a method and a system for automatically adjusting primary / secondary power-off parameters of a base station switching power supply, and the method comprises the following scheme: a first scheme: remote adjustment of the primary / secondary power-off parameters is realized through a communication protocol of a communication interface of a switching power supply monitoring unit; according to the second scheme, a primary / secondary power-off parameter automatic setting module is arranged, a driving function and a parameter setting function of a primary / secondary power-off device of an original switching power supply are integrated in the primary / secondary power-off parameter automatic setting module, power-off is conducted according to primary / secondary power-off voltage values Uy and Uz, or power-off is conducted according to primary / secondary power-off duration Ty and Tz, and the primary / secondary power-off parameter automatic setting module is set. Or respectively powering off according to the primary / secondary standby capacitance Cy and Cz. By adopting the technical scheme, the primary / secondary power-off parameters are automatically set, the power supply of the base station is ensured, and the control precision of the battery is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of communication base stations, and relates to a method and system for automatically adjusting the primary / secondary power-down parameters of a base station switching power supply. Background Art

[0002] As an important information exchange node in the information age, communication base stations provide great convenience for human life and production. With the advent of the 5G era, the 5G business of major communication companies has developed rapidly, and the number of communication base stations has increased. Correspondingly, the types and numbers of base station devices have also increased significantly. The operation of communication base stations relies on electrical energy support, and the backup power unit has become an indispensable device for base stations.

[0003] Since communication base stations are generally connected to the commercial power supply, in order to ensure the continuous stability of the operation of communication base stations, the prior art is to install a backup power supply for communication base stations when establishing communication base stations. The backup power supply of the base station is a backup power source set to maintain the normal operation of the base station after the base station power supply fails. The use of the backup power supply makes the communication of the base station safer and provides time for the repair and replacement of the base station power supply.

[0004] For general loads and important loads in communication base stations, the primary power-down voltage and the secondary power-down voltage are usually set. Currently, the primary power-down voltage and the secondary power-down voltage are mostly set as fixed values. This setting method does not consider the influence of load changes and battery capacity attenuation, which is not conducive to the utilization of batteries. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and system for automatically adjusting the primary / secondary power-down parameters of a base station switching power supply, which improves the control accuracy of the battery while ensuring stable power supply for the base station, and is conducive to the utilization of the battery.

[0006] To achieve the above purpose, the basic solution of the present invention is: a method for automatically adjusting the primary / secondary power-down parameters of a base station switching power supply, including one of the following solutions:

[0007] Solution 1:

[0008] Connect the switching power supply monitoring unit to the primary power-down switch and the secondary power-down switch respectively. The primary power-down switch is connected to the general load, and the secondary power-down switch is connected to the important load;

[0009] Through the communication protocol of the communication interface of the switching power supply monitoring unit, remote adjustment of the primary / secondary power-down parameters is realized;

[0010] Solution 2:

[0011] An automatic setting module for primary / secondary power-down parameters is provided. The automatic setting module for primary / secondary power-down parameters is respectively connected to a primary power-down switch and a secondary power-down switch. The primary power-down switch is connected to general loads, and the secondary power-down switch is connected to important loads.

[0012] The automatic setting module for primary / secondary power-down parameters has a driving function and a parameter setting function for the primary / secondary power-down switches inside, and powers down according to the primary / secondary power-down voltage values Uy and Uz, or powers down according to the primary / secondary backup power durations Ty and Tz respectively, or powers down according to the primary / secondary backup power capacities Cy and Cz respectively.

[0013] The working principle and beneficial effects of this basic solution are as follows: Based on the original switch power supply monitoring unit or the automatic setting module for primary / secondary power-down parameters, this technical solution realizes the adjustment of automatically setting the primary / secondary power-down parameters, ensuring stable power supply for the base station while improving the control accuracy of the battery, which is beneficial to the more reasonable and sufficient utilization of the battery under the conditions of load change, battery capacity attenuation, and capacity expansion, and improves the battery utilization rate and lifespan.

[0014] Further, in Solution 2, the automatic setting module for primary / secondary power-down parameters is based on the initial discharge duration-voltage-capacity curve of the base station battery, and based on the difference in the discharge curves between lithium iron phosphate batteries and lead-acid batteries, automatically identifies whether the backup battery of the base station is a lead-acid battery, a lithium iron phosphate battery, or a scenario where the two types of batteries are mixed.

[0015] According to the different types of backup batteries of the base station, as well as the current magnitudes and importance differences of the general loads and important loads of the base station respectively, the initial voltage values Uy0 and Uz of the primary power-down and secondary power-down are set. To protect the battery pack from deep discharge damage, the secondary power-down voltage value Uz must remain unchanged to ensure that under the condition of long-term power outage of the base station, there is enough backup power capacity Cz and backup power duration Tz left for the important loads of the base station after the general loads are powered down for the first time.

[0016] If the base station uses a hybrid battery system (such as a mixture of lead-acid batteries and lithium iron phosphate batteries), by analyzing the combination of two different discharge curves, the specific ratio of the batteries is judged. For important loads, power-down usually should start when the battery voltage is relatively high to ensure that the remaining battery power is sufficient to continuously supply power until the load needs it.

[0017] Further, in Solution 2, the automatic setting module for primary / secondary power-down parameters performs battery capacity verification tests according to the set period, and during each power outage of the external power supply, records and compares the duration-voltage-capacity curves of the current discharge and the initial discharge of the base station battery pack to evaluate the capacity attenuation of the battery pack, and calculates the remaining capacity SOC of the battery pack at the moment of the voltage Uk before the first power-down during the current discharge.

[0018] Obtain relevant data, which is beneficial for subsequent setting of primary / secondary power-down parameters and enables more accurate setting.

[0019] Furthermore, during each external power outage event, determine whether the generator power generation / external power restoration time is a determinable value.

[0020] If the generator power generation / external power restoration time is determinable, that is, the power outage duration T is known, and the actual battery capacity C evaluated by the most recent battery capacity test is ≥ (Iy + Iz) * T, then set the primary power-down voltage Uy equal to the secondary power-down voltage Uz to ensure that the base station does not lose power, where Iy is the current value of the general load of the base station and Iz is the current value of the critical load.

[0021] If the generator power generation / external power restoration time is not determinable, automatically correct the current primary power-down voltage parameter to Uyn according to the capacity attenuation / expansion during the battery discharge process, or remotely control the disconnection of the primary power-down switch in real time to ensure that the critical load at the back end of the secondary power-down meets the requirements of the backup capacity Cz and the backup duration Tz. The parameter correction method is as follows: based on the remaining battery capacity SOC at the voltage value Uk of the battery pack during the discharge process, when SOC = Cz = Iz * Tz, the corresponding voltage value at this moment is the corrected primary power-down voltage Uyn value, where Iz is the current value of the critical load.

[0022] Perform power-down control separately according to whether the generator power generation / external power restoration time is determinable, which enables more accurate control and ensures that the base station does not lose power.

[0023] Furthermore, determine whether the base station battery pack has been expanded compared to the initial state.

[0024] If the battery has not been expanded and during long-term operation, continuously increase the primary power-down voltage value Uyn according to the capacity attenuation of the base station battery pack during long-term operation, and gradually reduce the backup capacity Cy value of the battery pack discharged to the primary power-down and the discharge duration Ty value from the full battery capacity to the primary power-down to ensure that the critical load at the back end of the secondary power-down meets the requirements of the backup capacity Cz and the backup duration Tz.

[0025] If the base station battery pack is expanded, based on the discharge duration-voltage-capacity curve of the battery capacity test after expansion, the primary power-down voltage value Uyn can be reduced, and the Cy value and Ty value can be increased, so that the general load of the base station has a longer backup duration, while ensuring that the critical load at the back end of the secondary power-down meets the requirements of the backup capacity Cz and the backup duration Tz.

[0026] Furthermore, obtain the current voltage U during the discharge process, and set the discharge capacity when the battery is initially discharged to the voltage U as C u0 , and the discharge capacity when discharged to the voltage U this time is C un, calculate the variation relationship Tyn of the discharge duration Ty during a single power-down with respect to voltage:

[0027] Tyn = (Cmax * Cun / Cuo - Cz) / I

[0028] where C max is the maximum capacity of the battery, and I is the total current;

[0029] When the current discharge duration T = Tyn = (Cmax * Cun / Cuo - Cz) / I, the voltage value corresponding to this moment is the single power-down Uyn value.

[0030] In the case where the storage battery is not expanded and operates for a long time, the initial Cy value and Cz value gradually decrease, resulting in a gradual shortening of the backup durations Ty and Tz of the base station load. Therefore, it is necessary to continuously increase the single power-down voltage value Uy according to the attenuation of the capacity of the base station storage battery group during long-term operation to ensure the backup power demand.

[0031] The present invention also provides an automatic adjustment system for the primary / secondary power-down parameters of a base station switching power supply based on the method of the present invention, including one of the following solutions:

[0032] Solution 1: It includes a switching power supply monitoring unit, a storage battery group, a primary power-down switch, and a secondary power-down switch;

[0033] The switching power supply monitoring unit is respectively connected to the primary power-down switch and the secondary power-down switch. The storage battery group is connected to the bus. The secondary power-down switch and the primary power-down switch are sequentially arranged on the bus and are located at the rear end of the storage battery group. The primary power-down switch is connected to general loads, and the secondary power-down switch is connected to important loads;

[0034] Through the communication protocol of the communication interface of the switching power supply monitoring unit, remote adjustment of the primary / secondary power-down parameters is realized;

[0035] Solution 2: It includes a primary / secondary power-down parameter automatic setting module, a switching power supply monitoring unit, a storage battery group, a primary power-down switch, and a secondary power-down switch;

[0036] The control signal output terminals of the primary / secondary power-down parameter automatic setting module are respectively connected to the primary power-down switch and the secondary power-down switch. The switching power supply monitoring unit is connected to the primary / secondary power-down parameter automatic setting module;

[0037] The storage battery group is connected to the bus. The secondary power-down switch and the primary power-down switch are sequentially arranged on the bus and are located at the rear end of the storage battery group. The primary power-down switch is connected to general loads, and the secondary power-down switch is connected to important loads.

[0038] This system utilizes the original switch power supply monitoring unit or the automatic setting module for primary / secondary power-down parameters to achieve automatic adjustment of primary / secondary power-down parameters, ensuring that the base station does not lose power and enabling more precise control.

[0039] Furthermore, it also includes an FSU unit, and the FSU unit is connected to the automatic setting module for primary / secondary power-down parameters.

[0040] The FSU unit is set up to facilitate receiving the operation information of the automatic setting module for primary / secondary power-down parameters, obtaining the data on the operation status of the equipment, which is beneficial for use. Description of the Drawings

[0041] Figure 1 It is a schematic structural diagram of the automatic adjustment system for primary / secondary power-down parameters of the base station switch power supply of the present invention. Detailed Embodiments

[0042] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the 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 should not be construed as a limitation to the present invention.

[0044] In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0045] The present invention discloses an automatic adjustment method for primary / secondary power-down parameters of a base station switch power supply, including one of the following solutions:

[0046] Solution 1:

[0047] Connect the switch power supply monitoring unit to the primary power-down switch and the secondary power-down switch respectively. The primary power-down switch is connected to general loads, and the secondary power-down switch is connected to important loads;

[0048] Through the communication protocol of the communication interface of the switching power supply monitoring unit, remote adjustment of the primary / secondary power-down parameters is realized. In most cases, the switching power supply can only set the primary / secondary power-down voltage values;

[0049] Solution 2:

[0050] Set up a primary / secondary power-down parameter automatic setting module. The primary / secondary power-down parameter automatic setting module is respectively connected to the primary power-down switch and the secondary power-down switch. The primary power-down switch is connected to general loads, and the secondary power-down switch is connected to important loads;

[0051] The primary / secondary power-down parameter automatic setting module has the driving function and parameter setting function for the primary / secondary power-down switches inside. In this way, the functions of the original primary / secondary power-down can be extended to achieve power-down according to the primary / secondary power-down voltage values Uy and Uz, or power-down according to the primary / secondary backup power durations Ty and Tz respectively, or power-down according to the primary / secondary backup power capacities Cy and Cz respectively.

[0052] General loads such as base stations like wireless networks are connected to the backend of the primary power-down device, and important loads such as transmission networks are connected to the backend of the secondary power-down device. After the external commercial power outage, the battery pack starts discharging from the full capacity. Let the voltage value of the battery pack during the discharge process be Uk, the discharge capacity of the battery at this voltage be Cuk, the current value of the general load of the base station be Iy, the primary power-down voltage value be Uy, the discharge duration from the full battery capacity to the primary power-down be Ty, the current value of the important load be Iz, the secondary power-down voltage value be Uz (to protect the battery pack from deep discharge damage, the secondary power-down voltage value Uz must remain unchanged), and the discharge duration between the primary power-down and the secondary power-down be Tz. Therefore, the backup power capacity Cy of the battery pack discharged to the primary power-down = (Iy + Iz) * Ty (Ah); the backup power capacity Cz between the primary power-down and the secondary power-down = Iz * Tz (Ah).

[0053] In a preferred solution of the present invention, in Solution 2, the primary / secondary power-down parameter automatic setting module automatically identifies the scenario where the backup battery of the base station is a lead-acid battery, a lithium iron phosphate battery, or a mixture of the two based on the initial discharge duration-voltage-capacity curve of the base station battery and the difference between the discharge curves of lithium iron phosphate batteries and lead-acid batteries;

[0054] The discharge curve of a lead-acid battery is usually relatively smooth, the voltage drops slowly, and only drops sharply until approaching the end of the discharge. The relationship between the capacity and the discharge time of a lead-acid battery is also relatively linear. The discharge curve of a lithium iron phosphate battery is different. The voltage is relatively stable during the discharge process and only drops sharply until approaching the end of the discharge. Lithium iron phosphate batteries usually have a longer service life and better high-temperature performance, and the discharge performance is more stable.

[0055] By comparing the actual discharge curve with the discharge characteristics of known lead-acid batteries and lithium iron phosphate batteries, the battery type can be automatically identified. For example, a relatively smooth discharge curve with specific voltage changes may indicate a lithium iron phosphate battery; if the voltage remains stable for a long time and then drops rapidly, it may be a lead-acid battery. If the base station uses a hybrid battery system (such as a combination of lead-acid batteries and lithium iron phosphate batteries), the module will analyze the combination of the two different discharge curves to determine the specific battery ratio.

[0056] According to the different types of backup batteries in the base station and the current magnitudes and importance differences of the general loads and critical loads in the base station respectively, the initial voltage values Uy0 and Uz for the first power-down and the second power-down are set. To protect the battery pack from deep discharge damage, the second power-down voltage value Uz must remain unchanged to ensure that in the case of a long-term power outage in the base station, the general load has sufficient backup capacity Cz and backup duration Tz for the critical load of the base station after the first power-down.

[0057] The discharge curve of a lead-acid battery is relatively flat, and the voltage remains at a relatively high level for a long time. However, when discharging to a low voltage, the battery performance drops rapidly. To avoid deep discharge damage to the battery, the power-down is usually set when the discharge voltage of the lead-acid battery approaches 11.5V - 12V. Generally, the initial voltage for the first power-down (Uy0) is set at about 12V, and the initial voltage for the second power-down (Uz) can be set between 11.5V and 11.8V.

[0058] The discharge curve of a lithium iron phosphate battery is relatively stable, and the battery has a stronger deep discharge capacity. Therefore, when it discharges to a lower voltage, it will not be damaged as quickly as a lead-acid battery. For a lithium iron phosphate battery, the initial voltage for the first power-down (Uy0) can be set at about 12.8V, and the initial voltage for the second power-down (Uz) is set in the range of 12.0V to 12.5V.

[0059] The loads in the base station are divided into general loads and critical loads, and the current magnitudes and power dependencies of the loads are different. Therefore, when setting the power-down voltage, it is necessary to make a reasonable distribution according to the requirements of different loads.

[0060] General load:

[0061] The general load refers to the daily working load of the base station, including some less critical system equipment. For these loads, when the battery voltage drops, they may be able to tolerate a short-term voltage drop. In the case of general loads, the voltage setting can be appropriately reduced to ensure that the battery power is sufficient to support the critical load. The initial voltage for the first power-down (Uy0) can usually be set at 12.0V - 12.5V (for the transition between lead-acid batteries and lithium iron phosphate batteries), and the initial voltage for the second power-down (Uz) is set in the range of 11.5V - 12.0V.

[0062] Important load:

[0063] The important load usually refers to the core equipment of the base station, such as key facilities like communication and dispatching systems. These loads have very high requirements for the continuity of power supply. For these loads, it is necessary to avoid low voltage as much as possible to affect their stable operation. For important loads, power-off usually starts when the battery voltage is relatively high to ensure that the remaining battery power is sufficient to continuously supply power until the load needs it.

[0064] The initial voltage (Uy0) of the first power-off is set to 12.5V - 13.0V (the higher voltage for lithium iron phosphate batteries or lead-acid batteries), and the initial voltage (Uz) of the second power-off can be set to 12.0V or higher to ensure that important loads are not affected during the voltage drop process.

[0065] In a preferred embodiment of the present invention, in Solution 2, the first / second power-off parameter automatic setting module performs battery capacity testing according to a set period, and during each external power failure, it records and compares in detail the duration-voltage-capacity curve of the base station battery pack's current discharge and initial discharge to evaluate the capacity attenuation of the battery pack, and calculates the remaining capacity SOC of the battery pack at the voltage Uk moment before the first power-off during the current discharge (which can be determined according to the duration-voltage-capacity curve).

[0066] Obtaining relevant data is beneficial for subsequent setting of the first / second power-off parameters and enables more accurate setting.

[0067] In a preferred embodiment of the present invention, during each external power failure event, it is determined whether the time of generator power generation / external power restoration is a determinable value (firstly, judge the type of power failure. If it is due to regular maintenance, planned power outage, load fluctuation, or single-line circuit failure, the repair time can be determined, and this is a determinable power restoration time; if it is due to natural disasters, sudden equipment failures, etc., the power restoration time is unpredictable).

[0068] If the time of generator power generation / external power restoration is determinable, that is, the power outage duration T is known, and the actual capacity C of the battery evaluated by the most recent battery capacity testing (or the battery deep discharge data after the external power failure) ≥ (Iy + Iz) * T, then set the first power-off voltage Uy equal to the second power-off voltage Uz to ensure that the base station does not lose power; where Iy is the current value of the general load of the base station, and Iz is the current value of the important load.

[0069] If the power generation time of the diesel generator / the incoming time of the external power supply is uncertain, or it is impossible to ensure that the primary power-off is not interrupted, according to the capacity attenuation / expansion situation during the discharge of the battery, the current primary power-off voltage parameter is automatically corrected to Uyn, or the primary power-off switch is remotely controlled in real time to ensure that the important loads at the rear end of the secondary power-off meet the requirements of the backup power capacity Cz and the backup power duration Tz. The parameter correction method is as follows: Based on the remaining battery capacity SOC at the moment of the voltage value Uk of the battery pack during the discharge process, when SOC = Cz = Iz * Tz, the corresponding voltage value at this moment is the corrected primary power-off voltage Uyn value, and Iz is the current value of the important load.

[0070] In a preferred embodiment of the present invention, it is determined whether the base station battery pack is expanded compared with the initial state;

[0071] If the battery is not expanded and operates for a long time, the initial Cy value and Cz value gradually decrease, resulting in a gradual reduction in the backup power duration Ty and Tz of the base station load. According to the capacity attenuation of the base station battery pack during long-term operation, the primary power-off voltage value Uyn is continuously increased, and the backup power capacity Cy value of the battery pack discharged to the primary power-off and the discharge duration Ty value from the full battery capacity to the primary power-off are gradually reduced to ensure that the important loads at the rear end of the secondary power-off meet the requirements of the backup power capacity Cz and the backup power duration Tz;

[0072] If the base station battery pack is expanded, based on the discharge duration-voltage-capacity curve of the battery capacity verification after expansion, the primary power-off voltage value Uyn can be appropriately reduced, and the Cy value and Ty value can be increased, so that the general loads of the base station have a longer backup power duration, and at the same time, it is ensured that the important loads at the rear end of the secondary power-off meet the requirements of the backup power capacity Cz and the backup power duration Tz.

[0073] Preferably, the current voltage U is obtained during the discharge process, and the discharge capacity when the battery is initially discharged to the voltage U is set as C u0 , and the discharge capacity when the current discharge reaches the voltage U is C un , and the variation relationship Tyn of the discharge duration Ty of the primary power-off with the voltage is calculated:

[0074] Tyn = (Cmax * Cun / Cuo - Cz) / I

[0075] Among them, C max is the maximum capacity of the battery, and I is the total current;

[0076] When the current discharge duration T = Tyn = (Cmax * Cun / Cuo - Cz) / I, the corresponding voltage value at this moment is the primary power-off Uyn value.

[0077] The present invention also provides a base station switching power supply primary / secondary power-off parameter automatic adjustment system based on the method described in the present invention, as Figure 1As shown, it includes one of the following solutions:

[0078] Solution 1: It includes a switching power supply monitoring unit, a battery pack, a primary power-off switch, and a secondary power-off switch;

[0079] The switching power supply monitoring unit is electrically connected to the primary power-off switch and the secondary power-off switch respectively. The battery pack is electrically connected to the bus. The secondary power-off switch and the primary power-off switch are arranged on the bus in sequence and are located at the rear end of the battery pack. The primary power-off switch is electrically connected to general loads, and the secondary power-off switch is electrically connected to important loads.

[0080] Through the communication protocol of the communication interface of the switching power supply monitoring unit, remote adjustment of the primary / secondary power-off parameters is realized.

[0081] Solution 2: It includes a primary / secondary power-off parameter automatic setting module, a switching power supply monitoring unit, a battery pack, a primary power-off switch, and a secondary power-off switch;

[0082] The control signal output terminals of the primary / secondary power-off parameter automatic setting module are electrically connected to the primary power-off switch and the secondary power-off switch respectively. The switching power supply monitoring unit is electrically connected to the primary / secondary power-off parameter automatic setting module.

[0083] The battery pack is electrically connected to the bus. The secondary power-off switch and the primary power-off switch are arranged on the bus in sequence and are located at the rear end of the battery pack. The primary power-off switch is electrically connected to general loads, and the secondary power-off switch is electrically connected to important loads.

[0084] This system utilizes the original switching power supply monitoring unit or the primary / secondary power-off parameter automatic setting module to realize automatic adjustment of the primary / secondary power-off parameters, ensuring that the base station does not lose power and the control is more precise.

[0085] In a preferred solution of the present invention, the primary / secondary power-off parameter automatic adjustment system of the base station switching power supply further includes an FSU unit (dynamic environment monitoring unit), and the FSU unit is electrically connected to the primary / secondary power-off parameter automatic setting module.

[0086] Setting the FSU unit is convenient for receiving the operation information of the primary / secondary power-off parameter automatic setting module, obtaining the device operation condition data, and is beneficial for use.

[0087] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0088] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A method for automatically adjusting the primary / secondary power-off parameters of a base station switching power supply, characterized in that, Including one of the following solutions: Solution 1: Connect the switching power supply monitoring unit to the primary power-down switch and the secondary power-down switch respectively. The primary power-down switch is connected to general loads, and the secondary power-down switch is connected to critical loads; Through the communication protocol of the communication interface of the switching power supply monitoring unit, realize the remote adjustment of the primary / secondary power-down parameters; Solution 2: Set a primary / secondary power-down parameter automatic setting module. The primary / secondary power-down parameter automatic setting module is respectively connected to the primary power-down switch and the secondary power-down switch. The primary power-down switch is connected to general loads, and the secondary power-down switch is connected to critical loads; The primary / secondary power-down parameter automatic setting module has the driving function and parameter setting function for the primary / secondary power-down switches inside, and powers down according to the primary / secondary power-down voltage values Uy and Uz, or powers down according to the primary / secondary backup power durations Ty and Tz respectively, or powers down according to the primary / secondary backup power capacities Cy and Cz respectively.

2. The automatic adjustment method for the primary / secondary power-down parameters of the base station switching power supply according to claim 1, characterized in that, In Solution 2, the primary / secondary power-down parameter automatic setting module automatically identifies the scenario where the backup battery of the base station is a lead-acid battery, a lithium iron phosphate battery, or a mixture of the two based on the initial discharge duration-voltage-capacity curve of the base station battery and the difference between the discharge curves of lithium iron phosphate batteries and lead-acid batteries; According to the different types of backup batteries of the base station, as well as the current magnitudes and importance differences of the general loads and critical loads of the base station respectively, set the initial voltage values Uy0 and Uz of the primary power-down and the secondary power-down. To protect the battery pack from deep discharge damage, the secondary power-down voltage value Uz must remain unchanged to ensure that in the case of a long-term power outage of the base station, the general loads leave enough backup power capacity Cz and backup power duration Tz for the critical loads of the base station after the primary power-down.

3. The method for automatically adjusting the primary and secondary power-down parameters of the base station switching power supply according to claim 1, characterized in that, In Solution 2, the primary / secondary power-down parameter automatic setting module performs battery capacity verification tests at a set period, and during each external power outage, records and compares the duration-voltage-capacity curves of the current discharge and the initial discharge of the base station battery pack to evaluate the capacity attenuation of the battery pack and calculate the remaining capacity SOC of the battery pack at the voltage Uk moment before the primary power-down during the current discharge.

4. The method for automatically adjusting the primary / secondary power-down parameters of the base station switching power supply according to claim 1, wherein During each external power outage event, determine whether the generator power-on / external power-on time is a determinable value; If the generator power-on / external power-on time is determinable, that is, the power outage duration T is known, and the actual capacity C of the battery evaluated by the most recent battery capacity verification test is ≥ (Iy + Iz) * T, then set the primary power-down voltage Uy equal to the secondary power-down voltage Uz to ensure that the base station does not lose power, where Iy is the current value of the general load of the base station and Iz is the current value of the critical load. If the power generation time of the diesel generator / the incoming time of the external power supply is uncertain, according to the capacity attenuation / expansion during the discharge of the battery, automatically correct the current primary power-down voltage parameter to Uyn, or remotely control the disconnection of the primary power-down switch in real time, so as to ensure that the important loads at the rear end of the secondary power-down meet the requirements of the backup capacity Cz and the backup duration Tz. The parameter correction method is as follows: Based on the remaining battery capacity SOC at the moment of the voltage value Uk of the battery pack during the discharge process, when SOC = Cz = Iz * Tz, the corresponding voltage value at this moment is the corrected primary power-down voltage Uyn value, and Iz is the current value of the important load.

5. The automatic adjustment method for the primary / secondary power-down parameters of the base station switching power supply according to claim 4, characterized in that, Determine whether the base station battery pack has been expanded compared to the initial state; If the battery has not been expanded and is in long-term operation, continuously increase the primary power-down voltage value Uyn according to the capacity attenuation of the base station battery pack during long-term operation, and gradually reduce the backup capacity Cy value of the battery pack discharged to the primary power-down and the discharge duration Ty value from the full battery capacity to the primary power-down, so as to ensure that the important loads at the rear end of the secondary power-down meet the requirements of the backup capacity Cz and the backup duration Tz; If the base station battery pack is expanded, based on the discharge duration - voltage - capacity curve of the battery core capacity test after expansion, the primary power-down voltage value Uyn can be reduced, and the Cy value and Ty value can be increased, so that the general loads of the base station have a longer backup duration, and at the same time ensure that the important loads at the rear end of the secondary power-down meet the requirements of the backup capacity Cz and the backup duration Tz.

6. The method for automatically adjusting the primary / secondary power-down parameters of the base station switching power supply according to claim 5, characterized in that During the discharge process, obtain the current voltage U. Let the discharge capacity be C when the battery is initially discharged to the voltage U. u0 , and the discharge capacity is C when it is discharged to the voltage U this time. un , calculate the variation relationship Tyn of the discharge duration Ty of the first power-down with the voltage: Tyn = (Cmax * Cun / Cuo - Cz) / I Among them, C max is the maximum capacity of the battery, and I is the total current; When the current discharge duration T = Tyn = (Cmax * Cun / Cuo - Cz) / I, the corresponding voltage value at this moment is the primary power-down Uyn value.

7. A base station switching power supply primary / secondary power-down parameter automatic adjustment system based on the method according to any one of claims 1-6, characterized in that, It includes one of the following schemes: Scheme 1: It includes a switch power supply monitoring unit, a battery pack, a primary power-down switch, and a secondary power-down switch; The switch power supply monitoring unit is respectively connected to the primary power-down switch and the secondary power-down switch. The battery pack is connected to the bus. The secondary power-down switch and the primary power-down switch are arranged on the bus in sequence and are located at the rear end of the battery pack. The primary power-down switch is connected to the general load, and the secondary power-down switch is connected to the important load; Through the communication protocol of the communication interface of the switch power supply monitoring unit, remote adjustment of the primary / secondary power-down parameters is realized; Scheme 2: It includes a primary / secondary power-down parameter automatic setting module, a switch power supply monitoring unit, a battery pack, a primary power-down switch, and a secondary power-down switch; The control signal output terminals of the primary / secondary power-down parameter automatic setting module are respectively connected to the primary power-down switch and the secondary power-down switch. The switch power supply monitoring unit is connected to the primary / secondary power-down parameter automatic setting module; The battery pack is connected to the bus. The secondary power-down switch and the primary power-down switch are arranged on the bus in sequence and are located at the rear end of the battery pack. The primary power-down switch is connected to the general load, and the secondary power-down switch is connected to the important load.

8. The automatic adjustment system for the primary and secondary power-down parameters of the base station switching power supply according to claim 7, characterized in that It also includes an FSU unit, and the FSU unit is connected to the primary / secondary power-down parameter automatic setting module.

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