Base station direct current power generation control device with wide voltage range

Abstract

The invention discloses a base station direct current power generation control device with a wide voltage range, and the device comprises a plurality of storage battery charging and discharging modules which are respectively connected between a plurality of lithium battery packs and a direct current bus; the detection module is connected between the central controller and the direct current bus and is used for detecting the voltage of the direct current bus, the load current and the loss power consumption of the communication power supply in unit time; the battery pack acquisition module is connected between the central controller and the plurality of lithium battery packs so as to acquire the released electric quantity, the output voltage and the output current of each lithium battery pack in unit time; and the central controller is used for controlling the lithium battery packs to simultaneously supply power according to the power loss of the communication power supply in the unit time through the storage battery charging and discharging module according to the electric quantity released by the lithium battery packs in the unit time. According to the invention, the problem of direct-current mute power generation of battery packs with different voltages and different powers can be solved.

Description

Technical Field

[0001] The present application relates to the field of power equipment, and in particular to a base station direct current power generation control device with a wide voltage range. Background Art

[0002] The communication system relies on batteries for backup power. When the AC power is cut off, the performance of the battery and the power stored in the battery directly affect whether the communication equipment can achieve uninterrupted power supply. Under normal communication power supply conditions, the AC power supply is used to provide power to the communication equipment and batteries through a rectifier. There is a lot of uncertainty in AC power supply. Lightning, typhoons, short-circuit protection, etc. may all cause AC power outages. Batteries are the guarantee for the normal operation of the communication system. When the battery performance deteriorates or the AC power outage lasts too long, it is necessary to generate electricity for the DC system.

[0003] The traditional DC system uses an AC generator to generate electricity. The external AC power channel is cut off and the generator is connected. The generator powers the rectifier to achieve normal power supply for the communication system. The weight of the generator makes it very difficult to move the generator. Secondly, the generator generates very strong noise when generating electricity. The environmental pollution caused by this noise is gradually unacceptable.

[0004] At present, the DC power generation technology of lithium battery packs on the bus has defects. First, the voltage of the lithium battery pack must be higher than the bus voltage. In addition, the output of the lithium battery is not controlled, which is very inconvenient to use in many scenarios. Moreover, it does not have a charging function, and the lithium battery must be returned to a designated place for charging.

[0005] To sum up, the weight of the generator in the prior art makes it very difficult to move the generator, the generator generates very strong noise when generating electricity, the environmental pollution caused by this noise is gradually unacceptable, and the output of the lithium battery is uncontrolled, which is very inconvenient to use in many scenarios. The applicant has made corresponding explorations in order to solve these problems. Summary of the invention

[0006] The purpose of the present application is to solve the above-mentioned problem and provide a base station DC power generation control device with a wide voltage range.

[0007] To achieve the various objectives of this application, this application adopts the following technical solutions:

[0008] A base station DC power generation control device with a wide voltage range proposed for the purpose of this application includes:

[0009] Multiple lithium battery packs;

[0010] A plurality of battery charging and discharging modules, wherein the plurality of battery charging and discharging modules are respectively connected between a plurality of lithium battery packs and a DC bus, wherein the battery charging and discharging modules correspond one to one with the lithium battery packs;

[0011] A detection module, which is connected between the central controller and the DC bus and is used to detect the DC bus voltage, load current and power consumption of the communication power supply per unit time, wherein the communication power supply is a battery pack;

[0012] A battery pack acquisition module, wherein the battery pack acquisition module is connected between the central controller and the plurality of lithium battery packs, and the plurality of lithium battery packs are connected to the battery pack acquisition module through their respective communication ports to acquire the released power, output voltage and output current of each lithium battery pack per unit time;

[0013] The central controller is used to control the sum of the released power of each lithium battery pack to supply power simultaneously according to the power loss of the communication power supply per unit time through the battery charge and discharge module according to the released power of each lithium battery pack per unit time, and control the battery charge and discharge module corresponding to the lithium battery pack to increase or decrease the output voltage according to the difference between the output voltage corresponding to the lithium battery pack and the DC bus voltage.

[0014] Optionally, the multiple lithium battery packs are lithium battery packs with different voltage levels and different capacities.

[0015] Optionally, the lithium battery pack is a battery string consisting of a plurality of lithium batteries connected in series.

[0016] Optionally, the lithium battery pack is a single lithium battery.

[0017] Optionally, when the difference between the output voltage of the lithium battery pack per unit time and the DC bus voltage is a negative value, the central controller controls the battery charging and discharging module corresponding to the lithium battery pack to boost the output power supply;

[0018] When the difference between the output voltage of the lithium battery pack per unit time and the DC bus voltage is positive, the central controller controls the storage battery charging and discharging module corresponding to the lithium battery pack to step down the output power supply.

[0019] Optionally, the central controller is also used to control the battery charge and discharge module corresponding to the lithium battery pack to shut down or reduce the output current of the degraded battery pack when a lithium battery pack is in a state of performance degradation, and to distribute the reduced output power of the degraded battery pack to the remaining single battery packs for output.

[0020] Optionally, the central controller is further used to control the DC bus to charge each single battery pack after detecting through the detection module that the DC bus has resumed power supply.

[0021] Optionally, the central controller is also used to control the charge and discharge voltage and charge and discharge current of the battery charge and discharge module corresponding to the lithium battery pack according to the amount of electricity released by the lithium battery pack per unit time, so as to make the lithium battery pack operate in a safe state.

[0022] Optionally, the battery pack acquisition module is connected between the lithium battery pack and the central controller, and sends the monitored lithium battery pack data to the central controller for intelligent adjustment.

[0023] Optionally, the battery charging and discharging module is connected between the DC bus and the lithium battery pack, and is connected to the central controller and controlled by the central controller.

[0024] Compared with the prior art, the present application aims to solve the problems that the weight of the prior art generator makes it very difficult to carry the generator, the generator generates strong noise when generating electricity, the environmental pollution caused by this noise is gradually unacceptable, and the output of the lithium battery is uncontrolled, which is very inconvenient to use in many scenarios. The present application includes but is not limited to the following beneficial effects:

[0025] First, the base station DC power generation control device with a wide voltage range of the present application can support lithium battery packs of different voltage levels and different capacities, thus broadening the scope of silent power generation battery packs for communication systems;

[0026] Secondly, the base station DC power generation control device with a wide voltage range of the present application allows the battery pack to fully exert its own energy storage capacity without being affected by other battery packs.

[0027] Thirdly, the base station DC power generation control device with a wide voltage range of the present application can realize safe charging and discharging management of the battery pack, so that the battery pack is in a safe state regardless of the state;

[0028] Fourthly, the base station DC power generation control device with a wide voltage range of the present application can charge the battery pack after discharging it, and can be unmanned in the event of a long power outage. After the battery pack is fully charged, it can directly enter the next power generation scenario application.

[0029] Furthermore, the present application solves the problem of silent DC power generation of battery packs with different voltages and powers, and performs intelligent charge and discharge management on the battery packs, so that the battery packs have higher efficiency and higher safety, enriching the sources of battery packs for silent power generation of communication power supplies, and bringing more scientific and extensive applications to silent DC power generation of communication power supplies. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0031] Figure 1 It is a schematic diagram of the structure of a base station DC power generation control device with a wide voltage range in an embodiment of the present application. DETAILED DESCRIPTION

[0032] Below, the present application is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0033] This application is implemented using the following technical solutions:

[0034] A base station DC power generation control device with a wide voltage range is proposed to meet one of the purposes of this application, comprising:

[0035] Multiple lithium battery packs;

[0036] Specifically, the multiple lithium battery packs are lithium battery packs with different voltage levels and different capacities; the lithium battery pack may be a battery string of multiple lithium batteries connected in series; the lithium battery pack may also be a single lithium battery.

[0037] In some embodiments, the multiple lithium battery packs include a first lithium battery pack, a second lithium battery pack and a third lithium battery pack, wherein the first lithium battery pack is a 12V, 285AH lithium iron phosphate battery pack, the second lithium battery pack is a 60V, 100AH ​​lithium iron phosphate battery pack; the third lithium battery pack is a 120V, 100AH ​​lithium iron phosphate battery pack, and multiple battery charging and discharging modules are respectively connected between the first lithium battery pack, the second lithium battery pack and the third lithium battery pack and the DC bus, and the first lithium battery pack, the second lithium battery pack and the third lithium battery pack provide power to the load through their corresponding battery charging and discharging modules.

[0038] In some embodiments, a communication power supply DC system with a normal load current of 50A is described in detail: the DC bus voltage is -48V, and the battery pack type is a lead-acid valve-regulated battery; the voltage of the single battery in the battery pack is 2V, the battery capacity is 200AH, the number of single batteries is 24, and the load current is 50A. The above are the DC power supply parameters of the communication system.

[0039] In some embodiments, the power of the first lithium battery pack is 12V*285AH=3.5kwh, the power of the second lithium battery pack is 60V*100AH=6.0kwh, the power of the third lithium battery pack is 120V*100AH=12kwh, and the power of all lithium battery packs is 3.5kwh+6.0kwh+12kwh=21.5kwh.

[0040] A plurality of battery charging and discharging modules, wherein the plurality of battery charging and discharging modules are respectively connected between a plurality of lithium battery packs and a DC bus, wherein the battery charging and discharging modules correspond one to one with the lithium battery packs;

[0041] Specifically, multiple battery charge and discharge modules are respectively connected to the DC bus and the first lithium battery pack, the second lithium battery pack and the third lithium battery pack and the DC bus, and are connected to the central controller. The battery charge and discharge modules are controlled by the central controller. The battery charge and discharge modules correspond to the lithium battery packs one by one. The first lithium battery pack, the second lithium battery pack and the third lithium battery pack provide power to the load through their corresponding battery charge and discharge modules, wherein the first lithium battery pack corresponds to the first battery charge and discharge module, the second lithium battery pack corresponds to the second battery charge and discharge module, and the third lithium battery pack corresponds to the third battery charge and discharge module.

[0042] A detection module, which is connected between the central controller and the DC bus and is used to detect the DC bus voltage, load current and power consumption of the communication power supply per unit time, wherein the communication power supply is a battery pack;

[0043] Specifically, the detection module is connected between the central controller and the DC bus, and is used to detect the DC bus voltage, load current and the amount of power consumed by the battery pack per unit time. By detecting the DC bus voltage, load current and the amount of power consumed by the battery pack per unit time, the detection module determines the amount of power consumed by the communication power supply per unit time by multiplying the DC bus voltage and the load current. The battery charge and discharge module can control the sum of the released amounts of each lithium battery pack according to the amount of power consumed by the communication power supply per unit time, so as to supply power simultaneously according to the amount of power consumed by the communication power supply per unit time, thereby ensuring that each lithium battery pack operates safely and orderly.

[0044] In some embodiments, the central controller obtains DC bus voltage information and load information through the detection module, which includes: the DC bus voltage is 53.5V, the load current is 50A, and the power loss of the battery pack (communication power supply) per hour is obtained according to the bus voltage and load current, which is 2.6875kwh. The total power of the first lithium battery pack, the second lithium battery pack and the third lithium battery pack is 21.5kwh, which can support the communication power outage for 8 hours.

[0045] A battery pack acquisition module, wherein the battery pack acquisition module is connected between the central controller and the plurality of lithium battery packs, and the plurality of lithium battery packs are connected to the battery pack acquisition module through their respective communication ports to acquire the released power, output voltage and output current of each lithium battery pack per unit time;

[0046] Specifically, the battery pack acquisition module is connected between the lithium battery pack and the central controller, and sends the monitored lithium battery pack data to the central controller for intelligent adjustment. The lithium battery pack data includes the released power, output voltage and output current of each lithium battery pack per unit time.

[0047] In some embodiments, the amount of electricity released by each lithium battery pack per unit time includes: the amount of electricity released by the first lithium battery pack per unit time is 0.4375 kwh; the amount of electricity released by the second lithium battery pack per unit time is 0.75 kwh; the amount of electricity released by the third lithium battery pack per unit time is 1.5 kwh, and the unit time is one hour.

[0048] In some embodiments, when the difference between the output voltage of the lithium battery pack per unit time and the DC bus voltage is a negative value, the central controller controls the battery charge and discharge module corresponding to the lithium battery pack to boost the output power supply; when the difference between the output voltage of the lithium battery pack per unit time and the DC bus voltage is a positive value, the central controller controls the battery charge and discharge module corresponding to the lithium battery pack to step down the output power supply.

[0049] The central controller is used to control the sum of the released power of each lithium battery pack to supply power simultaneously according to the power loss of the communication power supply per unit time through the battery charge and discharge module according to the released power of each lithium battery pack per unit time, and control the battery charge and discharge module corresponding to the lithium battery pack to increase or decrease the output voltage according to the difference between the output voltage corresponding to the lithium battery pack and the DC bus voltage.

[0050] Specifically, when the battery pack acquisition module collects the released power of each lithium battery pack per unit time, specifically: the released power of the first lithium battery pack per unit time is 0.4375 kwh; the released power of the second lithium battery pack per unit time is 0.75 kwh; the released power of the third lithium battery pack per unit time is 1.5 kwh, the battery charge and discharge module controls the sum of the released power of each lithium battery pack to supply power simultaneously according to the power loss of the communication power supply per unit time according to the released power of each lithium battery pack per unit time, and controls the battery charge and discharge module corresponding to the lithium battery pack to boost or buck the output according to the difference between the output voltage corresponding to the lithium battery pack and the DC bus voltage. When the difference between the output voltage of the lithium battery pack per unit time and the DC bus voltage is a negative value, the central controller controls the battery charge and discharge module corresponding to the lithium battery pack to boost the output for power supply; when the difference between the output voltage of the lithium battery pack per unit time and the DC bus voltage is a positive value, the central controller controls the battery charge and discharge module corresponding to the lithium battery pack to buck the output for power supply.

[0051] In some embodiments, the central controller is also used to control the battery charging and discharging module corresponding to the lithium battery pack to shut down or reduce the output current of the degraded battery pack when a lithium battery pack is in a state of performance degradation, and distribute the reduced output power of the degraded battery pack to the remaining single battery packs for output.

[0052] In some embodiments, the central controller is further used to control the DC bus to charge each single battery pack after detecting through the detection module that the DC bus resumes power supply.

[0053] In some embodiments, the central controller is also used to control the charge and discharge voltage and charge and discharge current of the battery charge and discharge module corresponding to the lithium battery pack according to the amount of electricity released by the lithium battery pack per unit time, so as to make the lithium battery pack operate in a safe state.

[0054] In some embodiments, the battery charge and discharge module is connected between the DC bus and the lithium battery pack, and is connected to and controlled by the central controller. The central controller controls the battery charge and discharge module corresponding to the lithium battery pack to boost the output power supply, and the central controller controls the battery charge and discharge module corresponding to the lithium battery pack to step down the output power supply.

[0055] The specific implementation method of the base station DC power generation control device with a wide voltage range is as follows:

[0056] Step 1: Central controller The central controller obtains the following information through the battery pack acquisition module:

[0057] The power of the first lithium battery pack is: 12V*285AH=3.5kwh;

[0058] The power of the second lithium battery pack is: 60V*100AH=6.0kwh;

[0059] The power of the third lithium battery pack is: 120V*100AH=12kwh;

[0060] The total power of the lithium battery pack is: 3.5kwh+6.0kwh+12kwh=21.5kwh;

[0061] Step 2: Central controller The central controller obtains bus voltage information and load information through the detection module, which includes

[0062] The bus voltage is 53.5V and the load current is 50A;

[0063] The power consumption per hour for obtaining communication power is 2.675kwh;

[0064] The power of the first lithium battery pack, the second lithium battery pack and the third lithium battery pack can support the communication power outage for 8 hours;

[0065] Step 3:

[0066] The voltage of the first lithium battery pack is lower than the bus voltage, and the first storage battery charging and discharging module connected to the first lithium battery pack operates in a boost state;

[0067] The voltage of the second lithium battery pack is higher than the bus voltage, and the second storage battery charging and discharging module connected to the second lithium battery pack operates in a step-down output state;

[0068] The voltage of the third lithium battery pack is higher than the bus voltage, and the third storage battery charging and discharging module connected to the third lithium battery pack operates in a step-down output state;

[0069] Step 4: Let the first lithium battery pack, the second lithium battery pack and the third lithium battery pack be in a state of synchronously releasing electric energy, and output all the electric energy according to the electric power data in 8 hours; the first lithium battery pack corresponds, the second lithium battery pack corresponds, and the third lithium battery pack corresponds.

[0070] The central controller instructs the first battery charging and discharging module to release 0.4375 kwh of electricity per hour, which requires an output current of 33.5 A;

[0071] The central controller instructs the second battery charging and discharging module to release 0.75 kWh of electricity per hour, which requires an output current of 12.5 A;

[0072] The central controller instructs the third battery charging and discharging module to release 1.5 kWh of electricity per hour, which requires an output current of 12.5 A;

[0073] In actual work, the voltage of the battery pack will gradually decrease. When the voltage decreases, constant power output is required. The central controller will automatically control the output current of the lithium battery pack to meet the need for constant power output.

[0074] Step 5: During actual operation, when a battery pack deteriorates and cannot work according to the set program, the central controller shuts down or reduces the output current of the deteriorated battery pack and distributes the reduced output power of the deteriorated battery pack to the other two battery packs.

[0075] Step 6:

[0076] When the central controller detects that the busbar has resumed power supply, it will stop the discharge output of the battery pack.

[0077] Step 7:

[0078] After the AC power supply is restored, the battery pack is put into charging state and the charging current is gradually increased. The upper limit of the charging current is not more than 1C. If the rectifier output power is insufficient, the charging current of the battery pack is reduced to give priority to ensuring the power supply needs of the load.

[0079] It can be seen from the above embodiments that, compared with the prior art, the present application aims to solve the problems that the weight of the prior art generator makes it very difficult to carry the generator, the generator generates very strong noise when generating electricity, the environmental pollution caused by this noise is gradually unacceptable, and the output of the lithium battery is uncontrolled, which is very inconvenient to use in many scenarios. The present application includes but is not limited to the following beneficial effects:

[0080] First, the base station DC power generation control device with a wide voltage range of the present application can support lithium battery packs of different voltage levels and different capacities, thus broadening the scope of silent power generation battery packs for communication systems;

[0081] Secondly, the base station DC power generation control device with a wide voltage range of the present application allows the battery pack to fully exert its own energy storage capacity without being affected by other battery packs.

[0082] Thirdly, the base station DC power generation control device with a wide voltage range of the present application can realize safe charging and discharging management of the battery pack, so that the battery pack is in a safe state regardless of the state;

[0083] Fourthly, the base station DC power generation control device with a wide voltage range of the present application can charge the battery pack after discharging it, and can be unmanned in the event of a long power outage. After the battery pack is fully charged, it can directly enter the next power generation scenario application.

[0084] Furthermore, the present application solves the problem of silent DC power generation of battery packs with different voltages and powers, and performs intelligent charge and discharge management on the battery packs, so that the battery packs have higher efficiency and higher safety, enriching the sources of battery packs for silent power generation of communication power supplies, and bringing more scientific and extensive applications to silent DC power generation of communication power supplies.

[0085] The above-mentioned implementation modes are only preferred implementation modes of the present application and cannot be used to limit the scope of protection of the present application. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present application shall fall within the scope of protection required by the present application.

Claims

1. A base station DC power generation control device with a wide voltage range, characterized in that: include: Multiple lithium battery packs; A plurality of battery charging and discharging modules, wherein the plurality of battery charging and discharging modules are respectively connected between a plurality of lithium battery packs and a DC bus, wherein the battery charging and discharging modules correspond one to one with the lithium battery packs; A detection module, which is connected between the central controller and the DC bus and is used to detect the DC bus voltage, load current and power consumption of the communication power supply per unit time, wherein the communication power supply is a battery pack; A battery pack acquisition module, wherein the battery pack acquisition module is connected between the central controller and the plurality of lithium battery packs, and the plurality of lithium battery packs are connected to the battery pack acquisition module through their respective communication ports to acquire the released power, output voltage and output current of each lithium battery pack per unit time; The central controller is used to control the sum of the released power of each lithium battery pack to supply power simultaneously according to the power loss of the communication power supply per unit time through the battery charge and discharge module according to the released power of each lithium battery pack per unit time, and control the battery charge and discharge module corresponding to the lithium battery pack to increase or decrease the output voltage according to the difference between the output voltage corresponding to the lithium battery pack and the DC bus voltage.

2. The base station DC power generation control device with a wide voltage range according to claim 1, characterized in that: The multiple lithium battery packs are lithium battery packs with different voltage levels and different capacities.

3. The base station DC power generation control device with a wide voltage range according to claim 1, characterized in that: The lithium battery pack is a battery string in which a plurality of lithium batteries are connected in series.

4. The base station DC power generation control device with a wide voltage range according to claim 1, characterized in that: The lithium battery pack is a single lithium battery.

5. The base station DC power generation control device with a wide voltage range according to claim 1, characterized in that: When the difference between the output voltage of the lithium battery pack per unit time and the DC bus voltage is a negative value, the central controller controls the battery charging and discharging module corresponding to the lithium battery pack to boost the output power supply; When the difference between the output voltage of the lithium battery pack per unit time and the DC bus voltage is positive, the central controller controls the storage battery charging and discharging module corresponding to the lithium battery pack to step down the output power supply.

6. The base station DC power generation control device with a wide voltage range according to claim 1, characterized in that: The central controller is also used to control the battery charging and discharging module corresponding to the lithium battery pack to shut down or reduce the output current of the degraded battery pack when a lithium battery pack is in a state of performance degradation, and distribute the reduced output power of the degraded battery pack to the remaining single battery packs for output.

7. The base station DC power generation control device with a wide voltage range according to claim 1, characterized in that: The central controller is further used to control the DC bus to charge each single battery pack after detecting through the detection module that the DC bus resumes power supply.

8. The base station DC power generation control device with a wide voltage range according to any one of claim 1, characterized in that: The central controller is also used to control the charge and discharge voltage and charge and discharge current of the storage battery charge and discharge module corresponding to the lithium battery pack according to the amount of electricity released by the lithium battery pack per unit time, so as to make the lithium battery pack work in a safe state.

9. The base station DC power generation control device with a wide voltage range according to any one of claim 1, characterized in that: The battery pack acquisition module is connected between the lithium battery pack and the central controller, and sends the monitored lithium battery pack data to the central controller for intelligent adjustment.

10. The base station DC power generation control device with a wide voltage range according to any one of claim 1, characterized in that: The battery charging and discharging module is connected between the DC bus and the lithium battery pack, and is connected to the central controller and controlled by the central controller.

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