CN211556925U - Base station remote charging and discharging control device and direct current power supply system - Google Patents
Base station remote charging and discharging control device and direct current power supply system Download PDFInfo
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- CN211556925U CN211556925U CN202020244073.6U CN202020244073U CN211556925U CN 211556925 U CN211556925 U CN 211556925U CN 202020244073 U CN202020244073 U CN 202020244073U CN 211556925 U CN211556925 U CN 211556925U
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- power supply
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Abstract
The utility model provides a long-range charge-discharge control device of basic station and DC supply system, long-range charge-discharge control device of basic station includes control terminal and monitor terminal, control terminal includes the main control unit, is used for the first communication unit who is connected with uninterrupted power source communication, be used for with the second communication unit that monitor terminal communication is connected and be used for the third communication unit with remote control platform communication, and the main control unit communicates with uninterrupted power source and monitor terminal respectively according to the instruction that the third communication unit received; the monitoring terminal comprises a sampling unit, a fourth communication unit and a plurality of groups of test lines, and the sampling unit acquires preset parameters of a storage battery pack connected to the test lines according to signals from the control terminal and sends the preset parameters to the control terminal through the fourth communication unit. The utility model discloses can realize storage battery's long-range charge-discharge control, simplify storage battery's charge-discharge maintenance operation.
Description
Technical Field
The utility model relates to a storage battery maintains the field, and more specifically says, relates to a long-range charge-discharge control device of basic station and DC power supply system.
Background
The charge and discharge maintenance regulation of the storage battery pack is determined by related standard specifications such as YD T799-2010 communication valve-controlled sealed lead-acid storage battery and the like. At present, the charging and discharging maintenance of the storage battery pack is mainly realized in a manual mode, namely, a maintainer goes to the site to carry out the charging and discharging maintenance.
However, in practical engineering applications, especially for the storage battery of the dc system in the communication field, due to the unfavorable factors such as huge number of base stations and remote locations, the round-trip traffic between stations takes up a lot of working time, which makes it difficult to achieve comprehensive coverage for the maintenance of the storage battery of most base stations, and the manual maintenance is time-consuming and labor-consuming, and makes the maintenance work of the storage battery of the base stations difficult. The storage battery pack is lack of maintenance for a long time, so that premature aging is caused, and some safety faults even expansion combustion occur, so that great threat is caused to the safe operation of the base station.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to above-mentioned storage battery charge-discharge maintenance waste time and energy, the higher problem of cost, a long-range charge-discharge control device of basic station and DC supply system are provided.
The technical solution of the present invention is to provide a base station remote charging and discharging control device, for realizing remote charging and discharging control of a storage battery, and the storage battery is connected with an uninterruptible power supply via a dc bus, the device includes a control terminal and a monitoring terminal, the control terminal includes a main control unit, a first communication unit for communication connection with the uninterruptible power supply, a second communication unit for communication connection with the monitoring terminal, and a third communication unit for communication connection with a remote control platform, and the main control unit communicates with the uninterruptible power supply and the monitoring terminal respectively according to an instruction received by the third communication unit; the monitoring terminal comprises a sampling unit, a fourth communication unit and a plurality of groups of test lines, and the sampling unit acquires preset parameters of a storage battery pack connected to the test lines according to signals from the control terminal and sends the preset parameters to the control terminal through the fourth communication unit.
Preferably, the preset parameter includes a voltage of each unit cell; the sampling unit comprises a voltage sampling circuit, each group of test wires comprises two leads which are respectively connected to the anode and the cathode of one single battery in the storage battery pack, and each lead is connected to the voltage sampling circuit.
Preferably, the voltage sampling circuit includes a voltage detection chip, a signal selection chip and a plurality of sets of connection terminals, each set of connection terminals is connected with a set of test line respectively, and the plurality of sets of connection terminals are connected with the voltage detection chip via the signal selection chip respectively.
Preferably, the preset parameter comprises a discharge current of the storage battery pack; the sampling unit comprises a current sampling circuit and a Hall sensor in conductive connection with the current sampling circuit, and the Hall sensor is arranged on a lead connected with the storage battery and the direct-current bus.
Preferably, the preset parameter includes a temperature of the battery pack; the sampling unit comprises a temperature sampling circuit and at least one temperature sensor mounted on the storage battery pack, and the temperature sensor is electrically connected with the temperature sampling circuit.
The embodiment of the utility model provides a direct current power supply system is still provided, including uninterrupted power source, storage battery, remote control platform and as above the long-range charge-discharge control device of basic station, storage battery is connected with uninterrupted power source via direct current generating line, the control terminal of the long-range charge-discharge control device of basic station is connected with the uninterrupted power source communication through first communication unit, is connected with monitor terminal communication through the second communication unit and is connected with the remote control platform communication through the third communication unit; and the monitoring terminal of the base station remote charge-discharge control device is respectively connected with each single battery in the storage battery pack through the plurality of groups of test lines.
Preferably, the power supply end of the control terminal is connected to the direct current bus, and the power supply end of the monitoring terminal is connected to the storage battery pack.
Preferably, the first communication unit is composed of an RS485 communication module, and the first communication unit is connected to the uninterruptible power supply via an RS485 communication cable.
Preferably, the second communication unit and the fourth communication unit are respectively composed of an RS485 communication module, and the second communication unit is connected with the fourth communication unit via an RS485 communication cable.
Preferably, the third communication unit is formed by a LAN network module, and the control terminal is in communication connection with the remote control platform via a local area network or an ethernet network.
Implement the utility model discloses a long-range charge-discharge control device of basic station and DC supply system have following beneficial effect: the storage battery parameters are collected through the monitoring terminal, and meanwhile, the control terminal controls the uninterruptible power supply to perform charge and discharge control according to instructions from the remote control platform, so that the remote charge and discharge control of the storage battery is realized, the charge and discharge maintenance operation of the storage battery is simplified, and the problems of time waste and labor waste in manual maintenance of a remote base station are solved. And, the utility model discloses can carry out real time monitoring to storage battery, reach base station storage battery's automatic on-line maintenance and energy effective utilization, realize energy-concerving and environment-protective effect.
Drawings
Fig. 1 is a schematic diagram of a base station remote charging and discharging control device provided in an embodiment of the present invention;
fig. 2 is a schematic diagram of a dc power supply system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the embodiment of the present invention provides a schematic diagram of a base station remote charging and discharging control device, which can be used to realize remote charging and discharging control of a storage battery of a base station and other facilities, and the storage battery is connected with an uninterruptible power supply via a dc bus. The base station remote charging and discharging control device of the embodiment comprises a control terminal 11 and a monitoring terminal 12, wherein the control terminal 11 and the monitoring terminal 12 can be respectively located in two independent boxes, and the control terminal 11 and the monitoring terminal 12 are in communication connection, so that the remote charging and discharging control of the storage battery pack is realized in a matching manner.
The control terminal 11 includes a main control unit 111, a first communication unit 112, a second communication unit 113 and a third communication unit 114, where the first communication unit 112 is used for communicating with the ups, the second communication unit 113 is used for communicating with the monitoring terminal 12, and the third communication unit 114 is used for communicating with the remote control platform. The main control unit 111 can communicate with the ups and the monitoring terminal 12 respectively according to the command (e.g. discharge control command) received by the third communication unit 114 from the remote control platform, that is, send a control signal to the ups and the monitoring terminal 12 to implement corresponding operations.
The monitoring terminal 12 includes a sampling unit 121, a fourth communication unit 122 and a plurality of groups of test lines, and the sampling unit 121 obtains preset parameters of the battery pack connected to the test lines according to signals from the control terminal and sends the preset parameters to the control terminal 11 through the fourth communication unit 122. The preset parameters may be sent to the remote control platform through the third communication unit 114 of the control terminal 11, so that the remote control platform may generate a charging and discharging command according to the preset parameters.
According to the base station remote charge and discharge control device, the parameters of the storage battery pack are collected through the monitoring terminal 12, and meanwhile, the uninterrupted power supply is controlled to carry out charge and discharge control through the control terminal 11 according to the instruction from the remote control platform, so that the remote charge and discharge control of the storage battery pack is realized, the charge and discharge maintenance operation of the storage battery pack is simplified, and the problems that manual maintenance of a remote base station wastes time and labor are solved. And, the utility model discloses can carry out real time monitoring to storage battery, reach base station storage battery's automatic on-line maintenance and energy effective utilization, realize energy-concerving and environment-protective effect.
The present invention provides an embodiment, wherein the preset parameters include the voltage of each single battery, so that the remote control platform can determine whether the battery pack can discharge currently according to the voltage of the single battery. Correspondingly, the sampling unit 121 includes a voltage sampling circuit, each group of test lines includes two wires respectively connected to the positive pole and the negative pole of one single battery in the battery pack, and each wire is connected to the voltage sampling circuit, that is, each group of test lines has positive and negative polarities, the positive polarity line is connected to the positive pole column of the corresponding single battery, and the negative polarity line is connected to the negative pole column of the corresponding single battery. For example, when the battery pack includes 24 unit cells, the monitoring terminal 12 includes 24 sets of test lines, and the 24 sets of test lines are respectively connected to two ends of the 24 unit cells, so that the voltage sampling circuit can respectively test the voltages of the 24 unit cells.
Specifically, the voltage sampling circuit may include a voltage detection chip, a signal selection chip, and a plurality of sets of connection terminals, each set of connection terminals is connected to one set of test lines, and the plurality of sets of connection terminals are connected to the voltage detection chip via the signal selection chip, so that the signal selection chip may sequentially connect each set of test lines to the voltage detection chip, and the voltage detection chip may sequentially obtain voltages of each cell in the battery pack. In addition, the signal selection chip can also connect the lead connected with the anode of the first single battery in the storage battery pack and the lead connected with the cathode of the last single battery in the storage battery pack to the voltage detection chip, so that the voltage detection chip can obtain the voltage of the whole storage battery pack.
In another embodiment of the present invention, the preset parameter may further include a discharging current of the storage battery, so that the remote control platform may determine whether the storage battery can be currently discharged according to the discharging current of the storage battery. And in combination with the voltage of the single battery acquired by the voltage sampling circuit, the remote control platform can also calculate and acquire the internal resistance of each single battery, so that the state monitoring of the storage battery pack is realized. Correspondingly, the sampling unit 121 includes a current sampling circuit and a hall sensor electrically connected to the current sampling circuit, the hall sensor is mounted on a conductor connecting the battery pack and the dc bus, and the current sampling circuit can obtain a discharge current of the battery pack (i.e., a working current of the battery pack) according to a signal of the hall sensor. In particular, the range of the current sampling circuit and the Hall sensor is 10% -120% of the rated current of the storage battery pack.
Furthermore, in another embodiment of the present invention, the preset parameter includes a temperature of the battery pack, so that the remote control platform can determine whether the battery pack can be discharged currently according to the temperature. Accordingly, the sampling unit 121 includes a temperature sampling circuit and at least one temperature sensor mounted to the battery pack (e.g., the temperature sensor may be disposed in a terminal block of a test wire) that is electrically connected to the temperature sampling circuit so that the temperature sampling circuit can obtain the electrode temperature of the battery pack in real time.
In order to realize the remote monitoring of the storage battery pack, the control terminal 11 can send a storage battery polling command to the monitoring terminal 12 at regular time, and monitor the voltage, the current, the temperature, the internal resistance and the like of the storage battery pack and/or the single battery. The control terminal 11 can judge according to the current data returned by the monitoring terminal 12, and when the current is in the float charging range, the patrol inspection is to carry out internal resistance monitoring, and when the current exceeds the float charging current threshold value, the internal resistance monitoring is not carried out. The monitoring terminal 12 sends the preset parameters to the control terminal 11, the control terminal 11 participates in the operation, and the preset parameters are sent to the human-computer interface of the remote control platform through the third communication unit 114 for display.
As shown in fig. 2, the embodiment of the present invention further provides a dc power supply system, which includes an uninterruptible power supply 20, a storage battery pack 30, a remote control platform 40 and the base station remote charging and discharging control device as described above, wherein the ac end of the uninterruptible power supply 20 is connected to the utility power, the dc end is connected to the dc bus via a contactor K1, the storage battery pack 30 is connected to the dc bus via a contactor K2, that is, the storage battery pack 30 is connected to the uninterruptible power supply 20 via a contactor K2, the dc bus, a contactor K1; the control terminal 11 of the base station remote charging and discharging control device is in communication connection with the uninterruptible power supply through a first communication unit, is in communication connection with the monitoring terminal through a second communication unit, and is in communication connection with the remote control platform 40 through a third communication unit; the monitoring terminal 12 of the base station remote charging and discharging control device is respectively connected with each single battery in the storage battery pack 30 through a plurality of groups of test lines. The ups 20 is also connected to an ac load and a dc load 60 is also connected to the dc bus.
When the voltage level of the dc power supply system is dc 48V, the battery pack 30 is composed of 24 individual 2V cells. The operating power of the monitor terminal 12 is taken from the battery pack 30, i.e., the power supply terminal of the monitor terminal 12 is connected to the battery pack, for example, in the range of 18V to 75V, to ensure the monitor terminal 12 operates normally when the voltage of the battery pack 30 drops to the cutoff voltage of 43V or 50% of the rated voltage. The working power supply of the control terminal 11 can get power from the dc bus, that is, the power supply end of the control terminal 11 is connected to the dc bus, so that the power line of the control terminal 11 can be used as a test line for sampling the voltage of the dc bus at the same time.
In an embodiment of the present invention, the first communication unit in the control terminal 11 can be composed of an RS485 communication module, and the first communication unit is connected to the uninterruptible power supply 20 via an RS485 communication cable, and the data protocol between the first communication unit and the uninterruptible power supply can be provided by the uninterruptible power supply manufacturer. The second communication unit and the fourth communication unit can be respectively composed of an RS485 communication module, and the second communication unit is connected with the fourth communication unit through an RS485 communication cable. Specifically, the second communication unit and the fourth communication unit may adopt MAX485 chip circuits. In addition, the second communication unit and the fourth communication unit CAN also adopt a CAN communication module, for example, a TD301D CAN integrated circuit is adopted. In this embodiment, the control terminal 11, the monitoring terminal 12, and the uninterruptible power supply 20 adopt a master-slave architecture, the control terminal 11 is a master, and the monitoring terminal 12 and the uninterruptible power supply 20 are slaves.
The third communication unit may be formed by a LAN network module, and the control terminal 11 is connected to the remote control platform through a local area network or an ethernet network.
Specifically, the direct current power supply system can realize remote charging and discharging control of the base station storage battery pack in the following ways: the remote control platform 40 sends a discharge control command, and the control terminal 11 performs a battery polling task after receiving the discharge command, that is, sends a polling command to the monitoring terminal 12, and determines whether the state of the storage battery pack meets a discharge threshold condition (for example, when the storage battery pack 30 consists of 24-section 2V single batteries, the discharge threshold condition is that the voltage of the storage battery pack is not lower than 45V, the voltage of each single battery is not lower than 1.8V, the temperature of the storage battery pack is not higher than 40 ℃, and the next discharge process cannot be executed if any one of the above conditions is not met); when the discharge threshold condition is met, the control terminal 11 sets the ups according to the data protocol of the ups 20, reduces the dc side voltage of the ups 20 to 45V, at this time, the dc bus voltage is reduced, the battery pack voltage is greater than the dc bus voltage, the ac bypass output of the ups 20 is turned off, the battery pack is directly inverted into ac to supply power to the ac load 50, meanwhile, the battery pack also provides power to the dc load 60 on site, and the total discharge current of the battery pack is the sum of the dc load 50 and the dc power inversion consumption of the ups. The control terminal 11 transmits the discharge monitoring data to the human-machine interface of the remote control platform 40 in real time.
When the preset parameter of the battery pack reaches the charging threshold condition, the control terminal 11 may increase the dc side voltage of the ups 20 to the uniform charging voltage (for example, the uniform charging voltage may be 56.5V), and close the inverter channel of the ups 20 and open the ac bypass, so that the battery pack is converted from the discharging state to the charging state, and when the battery reaches the charging cutoff threshold condition (for example, the charging cutoff threshold condition may be that the battery pack voltage reaches 58V), the control terminal 11 controls the dc side voltage of the ups 20 to the floating charging voltage level (for example, the floating charging voltage may be 55.5V). In the charging or discharging process, when the temperature of the storage battery pack exceeds a set temperature threshold, the control terminal gives an alarm and terminates the ongoing charging and discharging task.
In particular, the charging and discharging time window of the direct current power supply system can be defined by the power department in the peak-valley electricity price period, the discharging is carried out in the peak electricity price period, the charging is carried out in the low-peak electricity price period, and if the low-peak electricity price period is not fully charged, the charging is continued in the flat-peak electricity price period until the full charging is achieved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A base station remote charging and discharging control device is used for realizing remote charging and discharging control of a storage battery pack, and the storage battery pack is connected with an uninterruptible power supply through a direct current bus, and is characterized by comprising a control terminal and a monitoring terminal, wherein the control terminal comprises a main control unit, a first communication unit used for being in communication connection with the uninterruptible power supply, a second communication unit used for being in communication connection with the monitoring terminal, and a third communication unit used for being in communication connection with a remote control platform, and the main control unit is respectively in communication with the uninterruptible power supply and the monitoring terminal according to an instruction received by the third communication unit; the monitoring terminal comprises a sampling unit, a fourth communication unit and a plurality of groups of test lines, and the sampling unit acquires preset parameters of a storage battery pack connected to the test lines according to signals from the control terminal and sends the preset parameters to the control terminal through the fourth communication unit.
2. The base station remote charge-discharge control device according to claim 1, wherein the preset parameter includes a voltage of each unit cell; the sampling unit comprises a voltage sampling circuit, each group of test wires comprises two leads which are respectively connected to the anode and the cathode of one single battery in the storage battery pack, and each lead is connected to the voltage sampling circuit.
3. The apparatus of claim 2, wherein the voltage sampling circuit comprises a voltage detection chip, a signal selection chip, and a plurality of sets of connection terminals, each set of connection terminals is connected to a set of test lines, and the plurality of sets of connection terminals are connected to the voltage detection chip via the signal selection chip.
4. The base station remote charge-discharge control device according to claim 1, wherein the preset parameter includes a discharge current of a storage battery pack; the sampling unit comprises a current sampling circuit and a Hall sensor in conductive connection with the current sampling circuit, and the Hall sensor is arranged on a lead connected with the storage battery and the direct-current bus.
5. The base station remote charge-discharge control device according to claim 1, wherein the preset parameter includes a temperature of the storage battery pack; the sampling unit comprises a temperature sampling circuit and at least one temperature sensor mounted on the storage battery pack, and the temperature sensor is electrically connected with the temperature sampling circuit.
6. A direct current power supply system is characterized by comprising an uninterruptible power supply, a storage battery pack, a remote control platform and the base station remote charge and discharge control device as claimed in any one of claims 1 to 5, wherein the storage battery pack is connected with the uninterruptible power supply through a direct current bus, and a control terminal of the base station remote charge and discharge control device is in communication connection with the uninterruptible power supply through a first communication unit, is in communication connection with a monitoring terminal through a second communication unit and is in communication connection with the remote control platform through a third communication unit; and the monitoring terminal of the base station remote charge-discharge control device is respectively connected with each single battery in the storage battery pack through the plurality of groups of test lines.
7. The DC power supply system of claim 6, wherein the power supply terminal of the control terminal is connected to the DC bus bar, and the power supply terminal of the monitoring terminal is connected to the battery pack.
8. The DC power supply system of claim 6, wherein the first communication unit is composed of an RS485 communication module, and the first communication unit is connected to the UPS via an RS485 communication cable.
9. The DC power supply system according to claim 6, wherein the second communication unit and the fourth communication unit are respectively composed of an RS485 communication module, and the second communication unit is connected to the fourth communication unit via an RS485 communication cable.
10. The DC power supply system according to claim 6, wherein the third communication unit is formed by a LAN network module, and the control terminal is communicatively connected to the remote control platform via a local area network or an Ethernet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020244073.6U CN211556925U (en) | 2020-03-02 | 2020-03-02 | Base station remote charging and discharging control device and direct current power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020244073.6U CN211556925U (en) | 2020-03-02 | 2020-03-02 | Base station remote charging and discharging control device and direct current power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211556925U true CN211556925U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020244073.6U Expired - Fee Related CN211556925U (en) | 2020-03-02 | 2020-03-02 | Base station remote charging and discharging control device and direct current power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211556925U (en) |
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2020
- 2020-03-02 CN CN202020244073.6U patent/CN211556925U/en not_active Expired - Fee Related
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Granted publication date: 20200922 |