CN201674257U - Distributed full-line battery pack discharge test equipment - Google Patents

Abstract

The utility model provides a distributed all-on-line storage battery pack discharge test device, which includes a DC-DC host power supply, a control unit, a battery pack online test switching switch, a second safety protection circuit, and a battery pack online test switch. Control circuit, a safety protection circuit connected in parallel, an automatic current-limiting charging and equipotential connection safety control circuit, a DC-DC converter, and a constant current discharge load intelligent control circuit and a discharge load circuit connected in series ; The utility model can be used as one or more battery packs for online discharge maintenance test one by one, and realizes the function of online battery packs for safe and energy-saving discharge of communication equipment loads and intelligent control of the auxiliary constant current discharge load to adjust the discharge load current. , easy operation and safety and energy-saving functions.

Description

Distributed full-line battery pack discharge test equipment

【Technical field】

The utility model relates to power supply maintenance equipment in a communication network, in particular to a distributed all-on-line storage battery pack discharge test equipment.

【Background technique】

The existing wireless base station power backup battery maintenance and management in the communication industry, due to the large number of wireless base stations, high maintenance labor intensity, high cost, high risk, heavy maintenance tasks, and waste of energy, most of the battery capacity discharge test The maintenance work has not been implemented in place, resulting in the ignorance of the actual capacity of the backup battery pack of the wireless communication base station, the duration of emergency power supply is not clear, and the emergency power generation dispatch management cannot be effectively carried out due to the interruption of the mains power supply, which often leads to communication interruption accidents of the wireless base station occurred, and the battery was scrapped ahead of time. These problems have been plaguing the power maintenance management workers and specific maintenance workers in the entire communication industry.

In order to realize the full-online unattended intelligent monitoring and management of the backup battery pack of the wireless communication base station power supply, the remote monitoring can automatically complete the capacity test of the online battery charge and discharge, timely control the capacity of all online battery packs on the live network and ensure the data of the power supply duration, and reduce maintenance. Reduce the labor intensity of personnel, reduce maintenance costs, improve network operation quality and overall maintenance efficiency, improve the comprehensive maintenance and management level of network security operations, adopt scientific and effective maintenance management technology, prolong the service life of battery packs, and realize online battery packs throughout the network Automatic detection of charging and discharging capacity and automatic maintenance and management of the system.

【Content of utility model】

The main technical problem to be solved by the utility model is to provide an all-on-line battery pack equipment system, which realizes the safe and energy-saving discharge of the online battery pack to the communication equipment load and the intelligent control of the auxiliary constant current discharge load to adjust the discharge load current. Intelligent, easy to operate and safe and energy-saving functions.

The utility model is realized in the following way: a distributed all-on-line battery pack discharge test equipment, characterized in that it includes: a DC-DC main engine working power supply, a control unit, a battery pack online test switching switch, a second safety protection circuit, a battery pack online test conversion control circuit, a safety protection circuit connected in parallel, an automatic current-limiting charging and equipotential connection safety control circuit, a DC-DC converter, and a constant current discharge load connected in series Intelligent control circuit and a discharge load circuit; the control unit further includes an MCU unit, and a current/voltage data acquisition and conversion control circuit connected to the MCU unit, battery pack monomer voltage detection equipment, data memory, Remote communication circuit, LCD display and keyboard input; the input of the on-line test switch of the battery pack is connected in parallel with the corresponding input of the second safety protection circuit, and then connected to the online battery pack; and one of the on-line test switches of the battery pack The output is connected to the output end of the second safety protection circuit, and the other output is respectively connected to the safety protection circuit in parallel, the automatic current-limiting charging and equipotential connection safety control circuit, one end of the DC-DC converter, and the constant current discharge load intelligence One end of the control circuit is connected; the output of the DC-DC host working power supply in the device is connected to the constant current discharge load intelligent control circuit, the battery pack online test conversion control circuit and the control unit, and the DC-DC host works One of the input terminals of the power supply is connected to the on-line test switch of the parallel battery pack and the output terminal of the second safety protection circuit, and the other terminal is connected to the DC-DC converter and the public power supply terminal of the discharge load circuit, that is Connected to both ends of the working power supply of the online communication device to provide normal working power for the host, the input of the DC-DC host working power supply has the characteristics of forward and reverse polarity power supply; the DC-DC converter is respectively connected to the current /Voltage data collection and conversion control circuit and MCU unit connection; The MCU unit is also connected with the constant current discharge load intelligent control circuit, automatic current limiting charging and equipotential connection safety control circuit, battery pack online test switch, the first 2. The safety protection circuit and the online test conversion control circuit of the battery pack are connected.

Preferably, the above technical solution further includes a power forward and reverse polarity protection circuit, the input of the power forward and reverse polarity protection circuit is connected to the output end of the online test switch of the battery pack, and the outputs are respectively connected to the The constant current discharge load intelligent control circuit is described, and the DC-DC converters connected in parallel, the safety protection circuit, the automatic current limiting charging and the equipotential connection safety control circuit are connected. Alternatively, both the DC-DC converter and the intelligent control circuit for constant current discharge load have the characteristics of forward and reverse polarity power supply.

Preferably, the above technical solution further includes an AC/DC switching power supply, the output and input of the AC/DC switching power supply are respectively connected to the DC-DC host working power supply and the commercial power supply.

Preferably, the above technical solution also includes at least one current detection circuit, which can be a current sensor, and each of the current detection circuits is coupled in the device to monitor each input terminal of the charging and discharging working power supply of the battery pack under test, for The distributed all-on-line battery pack discharge test equipment detects the charging and discharging current of the online battery pack.

Preferably, the safety protection circuit is a high-power diode, and its two ends are connected in series between the communication battery pack and the DC power distribution panel of the communication power system equipment, so as to ensure that the battery pack is always in a safe online working state without affecting Normal and safe power supply to communication system equipment.

Preferably, the second safety protection circuit includes a high-power bidirectional power supply static switch tube, a DC contactor or an electrical switch, and a static switch tube and a DC contactor or an electrical switch for controlling and protecting the high-power bidirectional power supply static switch tube and a DC contactor or an electrical switch. The working automatic control protection circuit and the high-power bidirectional power supply static switch tube are connected in parallel with the DC contactor or the electrical switch.

Preferably, if the on-line test switch of the battery pack has the function of connecting first and then disconnecting, the second safety protection circuit only needs to include a high-power bidirectional power supply static switch tube for controlling and protecting the high-power bidirectional power supply The automatic control and protection circuit of the static switch tube can omit the DC contactor or electrical switch; because the battery pack online test switch has the function of connecting first and then disconnecting, it can switch between the online charge and discharge test state and the online non-test state of the online battery pack The process is in a safe state of online power supply, its safety protection function remains unchanged, and its reliability is better.

The utility model has the advantages of:

1. The design and application of the distributed all-on-line battery pack discharge test equipment uses the voltage at both ends of the online communication backup battery pack as the input working power of the test equipment to meet the discharge characteristics of the battery, the operation and maintenance standards of the relevant communication power supply and the maintenance of the battery pack According to the test requirements, the discharge detection is all online and maintains the safety and energy saving of the discharge.

2. The design and application of the distributed all-on-line battery pack discharge test equipment system has the function of safe and energy-saving discharge of the online battery pack to the communication equipment load, and the online intelligent load constant current discharge function. At the same time, it can realize the constant current discharge capacity test of the online battery pack under the condition of meeting the load current of various communication equipment online.

3. The distributed full-online battery pack discharge test equipment has the functions of energy-saving discharge of online communication equipment and online load discharge, which is comprehensive and widely used.

4. The distributed full-line battery pack discharge test equipment has the function of positive and negative power supply polarity switch selection conversion control, which can meet the online constant current charge and discharge test of battery packs with different positive and negative communication power sources. It has a high degree of intelligence and strong functions. Flexible and safe to use.

5. Through the seamless connection technology, it is connected in series with the tested online battery pack to ensure that the battery pack is always in a safe online state of power supply, without affecting the normal and safe power supply to the communication system equipment, and realizes that the online battery pack can be selected by the test equipment Online battery pack or cycle discharge test, set discharge parameters for online intelligent charge and discharge maintenance.

6. When the actual load of the online communication equipment meets the constant current discharge of the battery pack under test, the equipment system automatically turns off the online intelligent load discharge; when the actual load of the online communication equipment does not meet the constant current discharge of the battery pack under test, the equipment system will Automatically control the online constant current discharge of intelligent loads to achieve the purpose of online constant current discharge capacity testing of the battery pack under test.

7. After the discharge capacity test is completed, the online rectifier output working power is automatically controlled by the test equipment for online current-limited charging, and the equipotential safety connection is automatically completed and the online normal work is resumed.

8. Compared with the traditional offline test using intelligent dummy load, it effectively solves the safety hazards of offline discharge operation, power supply and online restoration of the whole process of maintenance and testing. Charging and restoring equipotential connection and other advantages.

9. Compared with the advanced online "battery pack discharge test equipment", it has the online safety and energy-saving discharge test function of the battery pack and the online constant current intelligent load discharge test function, which can meet the constant current of the battery pack with various communication equipment loads in the current network Discharge test is more practical and has the function of safe and energy-saving discharge test.

10. Single battery on-line detection and alarm protection function. In the "device" circuit design, a single wireless voltage test management system or a single wired voltage test management system is adopted. The maintenance and detection are easy to operate and improve the safety of system maintenance work.

11. The output of the all-on-line battery test equipment system has the functions of constant voltage and current limiting, constant current and voltage limiting control and protection functions, as well as output overcurrent, overvoltage protection and overvoltage shutdown protection functions, and has online discharge capacity detection of communication backup battery packs And safe power supply protection features.

12. The all-on-line battery pack test equipment system has the characteristics of maintenance operation, simple parameter setting, high degree of intelligence, and strong protection function. The all-on-line battery pack discharge test system has a friendly operation interface and can be completed according to the system prompt Communication online battery pack capacity detection, and automatically save data for maintenance analysis and management;

13. The control system of the MCU unit of the all-on-line battery pack discharge test system is equipped with an AC backup power supply, so as to check, read, and copy test data and historical event records in a timely manner;

14. The control system output of the MCU unit of the all-on-line battery pack discharge test system has a standard data interface, as well as a USB interface and an IP network interface, which is flexible and convenient to use.

【Description of drawings】

The utility model will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is a schematic structural block diagram of Embodiment 1 of the distributed all-on-line battery pack discharge test equipment of the present invention.

Fig. 2 is a schematic structural block diagram of Embodiment 2 of the distributed all-on-line battery pack discharge test equipment of the present invention.

Fig. 3 is a schematic structural block diagram of Embodiment 3 of the distributed all-on-line storage battery pack discharge testing device of the present invention.

Fig. 4 is a schematic diagram of the seamless connection operation between Embodiment 1 to Embodiment 3 and the -48V communication power supply system.

Fig. 5 is a schematic diagram of connection between Embodiments 1 to 3 and -48V communication power system equipment.

Fig. 6 is a schematic diagram of connection between Embodiment 2 or Embodiment 3 and the equipment of the +24V communication power supply system.

Fig. 7 is a block diagram of the principle structure in the online discharge state when the first embodiment is applied to the -48V communication power supply system, in which the control unit part is omitted.

Fig. 8 is a block diagram of the principle structure in the online discharge state when the first embodiment is applied to the -48V communication power supply system, in which the control unit part is omitted.

Fig. 9 is a block diagram of the principle structure in the online discharge state when the third embodiment is applied to the -48V communication power supply system, in which the control unit part is omitted.

Fig. 10 is a block diagram of the principle structure in the online discharge state when the third embodiment is applied to the -48V communication power supply system, in which the control unit part is omitted.

【Detailed ways】

The distributed all-on-line storage battery pack discharge testing device of the utility model is applied to a full-on-line battery pack equipment system, and the full-on-line battery pack equipment system usually also includes a tested battery pack and communication equipment. The communication device is powered by the battery pack as a backup power supply.

Give the following 3 embodiments now, and explain its working principle.

Embodiment one

Please refer to Figure 1, a distributed full-line battery pack discharge test equipment includes: a DC-DC host power supply 1, a control unit 2, a safety protection circuit 3, an automatic current-limited charging and equipotential connection safety Control circuit 4, a constant current discharge load intelligent control circuit 5, a discharge load circuit 6, a second safety protection circuit 10, a DC-DC converter 12, a battery pack online test switch 13, a battery pack online test switch control circuit 14. The control unit 2 further includes an MCU unit 21, and a current/voltage data acquisition and conversion control circuit 22 connected to the MCU unit 21, a battery unit voltage detection device 23, a data memory 24, and a remote communication circuit. 25. LCD display and keyboard input 26;

The safety protection circuit 3, the automatic current-limiting charging and equipotential connection safety control circuit 4, and the DC-DC converter 12 are connected in parallel, and the two ends of the parallel connection are respectively the D+1 terminal and the D-1 terminal, and the The positive and negative poles of the safety protection circuit 3 are respectively connected to the D+1 terminal and the D-1 terminal, and the constant current discharge load intelligent control circuit 5 and the discharge load circuit 6 are connected in series;

After the input of the battery pack online test switch 13 is connected in parallel with the corresponding input of the second safety protection circuit 9, it is connected to the online battery pack; and one of the outputs of the battery pack online test switch 13 is connected to the second safety protection circuit. The output terminal of 10, and the safety protection circuit 3, the automatic current-limiting charging and equipotential connection safety control circuit 4, and one end of the parallel connection of the DC-DC converter 12 are connected;

The output of the DC-DC host working power supply 1 in the device is connected to the constant current discharge load intelligent control circuit 5, the battery pack online test conversion control circuit 14 and the control unit 2, and the DC-DC host working power supply 1 One of the two input ends of the input terminal is connected with the on-line test switch 13 of the parallel battery pack and the output end of the second safety protection circuit 10, and the other end is connected with the DC-DC converter 12 and one end of the common power supply of the discharge load circuit 6 connect;

The DC-DC converter 12 is respectively connected with the current/voltage data acquisition and conversion control circuit 22 and the MCU unit 21; the MCU unit 21 is also respectively connected with the constant current discharge load intelligent control circuit 5, automatic current limiting The charging and equipotential connection safety control circuit 4, the battery pack online test switch 13, the second safety protection circuit 10, and the battery pack online test conversion control circuit 14 are connected;

The battery pack under test is connected to the parallel DC-DC converter 12 by the output of the battery pack online test switch 13, and the input of the constant current discharge load intelligent control circuit 5 to provide the normal working power of the whole machine; Both ends of the input of the DC-DC host working power supply 1 are connected to the online working power supply to provide normal working power for the host.

The functions of the above circuit modules are described as follows:

The DC-DC main engine working power supply 1: provides working power for the constant current discharge load intelligent control circuit 5, the battery pack online test conversion control circuit 14, and the control unit 2;

The control unit 2: this circuit module uses the system program instructions of the MCU unit 21 as the control mode to control the constant current discharge load intelligent control circuit 5, the automatic current limiting charging and equipotential connection safety control circuit 4, and the second safety protection circuit 10. DC-DC converter 12, battery pack online test conversion control circuit 14;

The safety protection circuit 3 can be a high-power diode. When the battery pack under test is in the working state of the online test, its high-power diode is serially connected to the communication battery pack and the communication power supply system equipment via the battery pack online test switch 13 Between the DC power distribution panels, to ensure that the battery pack under test is always in the power supply safety online state, without affecting the normal and safe power supply to the communication system equipment, the negative pole of the high-power diode is connected to the D+1 terminal, and the positive pole is connected to the D-1 terminal ;

The automatic current-limiting charging and equipotential connection safety control circuit 4: after completing the discharge test of the battery pack under test, automatically perform online current-limiting charging, and perform equipotential safety connection to restore the battery pack under test to online normal operation;

The constant current discharge load intelligent control circuit 5: according to the setting parameters of the discharge equipment system, automatically complete the control and test of the online dummy load constant current discharge of the battery pack under test;

The discharge load circuit 6: a working circuit that allows the discharge load current to pass through the battery pack under test controlled by the constant current discharge load intelligent control circuit 5;

The second safety protection circuit 10: includes a high-power bidirectional power supply static switch tube, a DC contactor, and an automatic control protection circuit for controlling and protecting the high-power bidirectional power supply static switch tube and the DC contactor (both not shown), and the high-power bidirectional power supply static switch tube and the DC contactor are connected in parallel. The second safety protection circuit 10 ensures that the battery pack under test can provide real-time, uninterrupted and safe power supply during the charging or discharging testing process. At the same time, it is also one of the main circuits to complete the charge and discharge conversion control and complete the equipotential connection.

The DC-DC converter 12: is a high-frequency switching power supply circuit, its output voltage and current are continuously adjustable, and it has high reliability such as constant current limiting voltage, stable voltage limiting current, overvoltage, overcurrent, short circuit, etc. automatic control protection function.

The on-line test switching switch 13 of the accumulator pack: for the on-line working accumulator pack to perform connection switching with the output terminal, it is placed in the execution switch for "on-line test" or "on-line non-test" connection work (the tested accumulator pack is connected to the "on-line test" terminal That is, the battery pack under test is in the state of full online charge and discharge test; the battery pack under test is connected to the "online non-test" end, that is, the battery pack under test is in a state of full online connection, not in the state of full online charge and discharge test). If the on-line test switching switch of the battery pack has the function of connecting first and then leaving, the second safety protection circuit only needs to include a high-power bidirectional power supply static switch tube for controlling and protecting the high-power bidirectional power supply static switch tube. The automatic control and protection circuit can be used, and the DC contactor or electrical switch can be omitted; because the battery pack online test switch has the function of connecting first and then leaving, it can automatically put the online battery pack into the switching process of the online test state and the online non-test state. In the safe state of online power supply, its safety protection function remains unchanged and its reliability is better.

The battery pack on-line test conversion control circuit 14: a key control circuit for driving and controlling the execution of the battery pack on-line test switching switch 13 to select the on-line working battery pack to switch to the "on-line test" or "on-line non-test" connection working state.

This embodiment can also include an AC/DC switching power supply 7, 1 and N (N can be configured according to actual user needs, and N≤4) current detection circuits 8 are configured according to the communication power supply design specification for the number of parallel battery packs. The output and input of the DC switching power supply 7 are respectively connected to the DC-DC host operating power supply 1 and the commercial power, so as to introduce the commercial power as the AC input power supply of the host power supply; the current detection circuit 8 can be a current sensor , the current detection circuit 8 is connected to each terminal of the distributed all-on-line battery pack discharge test equipment, and detects the charging and discharging current of the online battery pack under test for the distributed all-on-line battery pack discharge test equipment.

Please refer to Fig. 1 again, in order to connect conveniently when the distributed all-on-line battery pack discharge test equipment of this embodiment is applied, the discharge load circuit 6, the DC-DC converter 12, and the DC-DC host operating power supply will be connected The input of 1 leads to a power output line, which has a first connection terminal A; and then connects the battery pack online test switch 13 to a contact point of the second safety protection circuit 10 connected in parallel to lead a power output line, which has at least one second connection Terminal B, that is, the connection terminals B1~BN at one end of the online battery pack (N can be configured according to actual user needs, and the number of parallel battery packs is configured according to the communication power supply design specification N≤4); DC-DC converters connected in parallel 12, Safety protection circuit 3, automatic current-limiting charging and self-recovery equipotential connection safety control protection circuit 4 and second safety protection circuit 10, battery pack online test switching switch 13 output a common terminal leading to a power output line, with a third connection Terminal D. The positive and negative terminals corresponding to the DC-DC converter 12, the DC-DC mainframe working power supply 1, the constant current discharge load intelligent control circuit 5 and other input working power sources need to be connected correspondingly.

Embodiment two

As shown in Figure 2, the distributed all-on-line battery pack discharge test equipment in this embodiment 2 is basically the same as the above-mentioned embodiment 1 in terms of structure and connection terminals. The difference between the two is that in this embodiment 2, the DC- The DC converter 12, the DC-DC host power supply 1, and the constant current discharge load intelligent control circuit 5 all have the characteristics of forward and reverse polarity power supplies. It can realize the best and safe operation mode, and is suitable for the discharge maintenance test of different positive and negative communication power supply online battery packs. Regardless of whether the working power supply is positive or negative grounding, when the device performs online maintenance tests, it only needs to operate the working ground terminal of the power supply connected to the side of the battery pack, which avoids the risk of short-circuiting the operation and grounding, and has the ability to charge the online battery pack with constant current and limited voltage. And the constant voltage and current limiting charging maintenance function, the maintenance test is more flexible, safe and convenient.

Therefore, the second embodiment has two situations, the DC-DC converter 12 of the two situations, the automatic current-limiting charging and the self-restoring equipotential connection safety control protection circuit 4, and the parallel connection output positive and negative poles 2 of the safety protection circuit 3 The connections of the two common terminals (positive pole D+1 and negative pole D-1) are reversed to suit -48V and +24V communication power system equipment respectively. Wherein, in the first case, the positive pole D+1 terminal is at the top, and the negative pole D-1 terminal is at the bottom, the structure shown in it is the same as that in Figure 1, and the description in Embodiment 1 can be referred to, which will not be repeated here; the second In the first case, the positive terminal D+1 is at the bottom, and the negative terminal D-1 is at the top. In the second case, the parallel-connected negative common terminal D-1 is connected to the third terminal D, and the parallel-connected positive terminal D+1 Connect the constant current discharge load intelligent control circuit 5, so that the positive and negative polarities of the first terminal A, the second terminal B and the third terminal D are opposite to those in Figure 1, and the rest are the same.

Embodiment three

Please refer to Fig. 3, the third embodiment is a transformation of the second embodiment. Compared with the second embodiment, the difference between the two is that the distributed all-on-line storage battery pack discharge test equipment of the third embodiment also includes a Power supply forward and reverse polarity working protection circuit 9, the output of the power supply forward and reverse polarity working protection circuit 9 is connected in series with the constant current discharge load intelligent control circuit 5 and discharge load circuit 6, and then connected in parallel with DC-DC The converter 12 and other structures are the same as those in the second embodiment.

Explanation: The power input distributed in the DC-DC converter 12, the constant current discharge load intelligent control circuit 5 and the DC-DC host power supply 1 in the second embodiment all have the function of forward and reverse polarity work protection circuit, and The third embodiment is to supply the output of the forward and reverse polarity protection circuit 9 of a power supply to two functional modules of the DC-DC converter 12 and the constant current discharge load intelligent control circuit 5 . Therefore, the above two embodiments have the same function, so they can still be respectively adapted to two types of communication power supply system equipment of -48V and +24V.

Therefore present embodiment three also has two kinds of situations, the DC-DC converter 12 of these two kinds of situations, automatic current-limiting charging and self-restoring equipotential connection safety control protection circuit 4, safety protection circuit 3 are connected in parallel and output 2 positive The connection of the common terminal of the negative pole connection (positive pole D+1 terminal, negative pole D-1 terminal) is opposite, and they are also suitable for two kinds of communication power supply system equipment of -48V and +24V respectively.

Please refer to FIG. 3 again. In order to facilitate the connection of the distributed all-on-line battery charge and discharge test equipment of this embodiment, the forward and reverse polarity working protection circuit 9 of the power supply and the working power supply of the DC-DC host are connected. One end of the input of 1 is connected in parallel with the forward and reverse polarity working protection circuit 9 of the power supply to lead out a power supply output line, which has a first connection terminal A, and the other end is connected in parallel with the DC-DC converter 12, the safety protection circuit 3, Automatic current-limiting charging and self-restoring equipotential connection safety control protection circuit 4, second safety protection circuit 10, battery pack on-line test switching switch 13 output a common terminal leads to a power output line, which has a third terminal D. The on-line test switching switch 13 of the storage battery pack corresponds to a contact point of the second safety protection circuit 10 connected in parallel to lead a power output line, and has at least one second connection terminal B, which is connected to the connection terminals B1-BN at one end of the on-line storage battery group (N specifically It can be configured according to actual user needs, and the number of parallel battery packs can be configured according to the communication power supply design specification N≤4).

As shown in FIG. 4 and FIG. 5 , it is a schematic diagram of the wiring of the -48V communication power supply system equipment in the first case of the first embodiment, the second embodiment and the third embodiment. Connect the input terminals of the distributed all-on-line battery pack discharge test equipment through the battery pack under test, that is, the first terminal A (negative pole) and the second terminal B (positive pole) as the working power supply of the battery pack online test equipment. The output of the third terminal D (positive pole) and the two ends of the second terminal B are connected in series between the battery pack under test and the working power supply of the online communication equipment, and the third terminal D (positive pole) is connected to the DC power supply system of the communication power supply equipment. Positive collecting bar of power distribution panel. The working ground of -48V power supply is the positive ground, then the D terminal is connected to the D+1 terminal, and the D-1 terminal is connected to the "online test" terminal output by the battery pack online test switch 13. According to the menu selection and parameter setting of the MCU unit 21 of the distributed all-on-line battery pack discharge test equipment, the output of the battery pack online test switch 13 is automatically controlled to be placed in the "on-line test" working state, and the output voltage of the DC-DC converter 12 is controlled. (The voltage at both ends of terminals B and D), to increase the working voltage of the online communication equipment, and to achieve the purpose of full online discharge test of the battery pack.

As shown in FIG. 5 , it is a schematic diagram of the seamless connection operation between the first case of Embodiment 1 and Embodiment 2 and Embodiment 3 and the -48V communication power supply system.

When in use, the distributed full-online battery pack discharge test equipment is serially connected between the communication battery pack and the DC power distribution panel of the communication power system equipment through the "device" seamless connection technology to ensure that the battery pack is always in a safe online working state , without affecting the normal and safe power supply to the communication system equipment. The input working power of the distributed all-on-line battery pack discharge test equipment is provided by the power supply of the battery pack under test. During the operation, only the positive terminal of the battery pack (the working ground wire of the power supply) is removed from the battery pack, that is, the positive terminal of the rectifier power supply is connected in series, and the operation is simple and safe.

The operation process of the online seamless connection technology is as follows: the battery pack equipment of the communication power system is fully online and seamlessly connected, and the distributed full-line battery pack discharge test equipment is connected in series to the positive pole of the online battery pack (power supply ground wire) , that is to connect in series with the positive collection line of the rectifier and the power supply of the load equipment. The access of the distributed full-line battery pack discharge test equipment should follow the principle of "first connect three, and then remove one". The battery pack discharge test equipment When the test is completed and the service is withdrawn, the principle of "connecting one first, then dismantling three" should be followed. Please refer to Figure 6, taking the -48V communication power supply battery pack under test as an example, "connect three first, then remove one" means: first connect the power output lines L1, L2, L3 of the distributed full-line battery pack discharge test equipment, Connect the terminals B, A, and D of the test equipment to the positive terminal of the battery pack (that is, the terminal for connecting the battery pack to the power source) terminal B, the negative terminal or the DC power distribution panel to output a shunt A1 and -48V Communication power supply positive terminal GD, then remove the original power connection line L5 of the positive terminal of the battery pack under test, that is, disconnect the positive terminal C1 of the battery pack from the positive terminal GD of the -48V communication power supply; "Connect one first, "Remove three after" means: the battery pack under test completes the test, and automatically performs current-limiting charging until the equipotential automatic connection exits service. The original power connection line L5 of the positive terminal C1 of the battery pack under test should be connected first, and then the power supply at the C1 terminal should be removed. Line L1, A1 end power line L2 and GD end power line L3.

As shown in FIG. 6 , it is a schematic diagram of wiring of the second situation of Embodiment 2 or Embodiment 3 and the equipment of the +24V communication power supply system. Connect the input terminals of the distributed all-on-line battery pack discharge test equipment through the online battery pack, that is, the first terminal A (positive pole) and the second terminal B (negative pole) as the working power supply of the battery pack online test equipment. The output of the third terminal D (negative pole) and the two ends of the second terminal B are connected in series between the battery pack under test and the working power supply of the online communication equipment, and the third terminal D (negative pole) is connected to the DC of the communication power supply equipment system. Negative collecting bar of power distribution panel. The working ground of the +24V power supply is the negative ground, then the D terminal is connected to the D-1 terminal, and the D+1 terminal is connected to the "online test" terminal output by the battery pack online test switch 13. According to the menu selection and parameter setting of the MCU unit 21 of the distributed all-on-line battery pack discharge test equipment, the output of the battery pack online test switch 13 is automatically controlled to be placed in the "on-line test" working state, and the output voltage of the DC-DC converter 12 is controlled. (The voltage at both ends of terminals B and D), to increase the working voltage of the online communication equipment, and to achieve the purpose of full online discharge test of the battery pack.

7 to 8, the working principle of the online discharge capacity test of the -48V communication power backup battery pack is taken as an example to illustrate the working principle of the application of the first embodiment.

Now select one of the -48V tested battery packs I to carry out the online capacity discharge test. The tested battery pack I shown in Fig. 7 is used for the online discharge capacity test. The MCU unit program control of the all-on-line battery pack discharge test equipment outputs an instruction signal through the battery pack on-line test conversion control circuit 14 to drive and control the battery pack on-line test switch 13, and select a tested battery pack 1 for online discharge capacity testing. The battery pack 1 under test is output to the online test terminal through the switching of the battery pack on-line test switching switch 13, so that the battery pack under test is in the "on-line test" working state. The B1 end connected to the positive pole of the battery pack I under test is connected to the D-1 end via the output of the on-line test switch 13 of the battery pack, and is connected in series with the forward and reverse working protection circuit 9 of the input power supply, so that the battery pack I under test The power supply provides working power to the DC-DC converter 12 , the constant current discharge load intelligent control circuit 5 and the discharge load circuit 6 through the forward and reverse polarity protection circuit of the input power supply. The positive electrode of the battery pack I under test is connected in series with the B1 port of the distributed full-line battery pack discharge test equipment, and the on-line test switching switch 13 of the battery pack is connected and connected to the forward and reverse polarity protection circuit 9 of the input power supply, so that The series branch of the battery pack I power supply under test, the constant current discharge load intelligent control circuit 5, and the discharge load circuit 6 (that is, the constant current discharge load and the intelligent control system circuit) is connected in parallel, and the positive electrodes of the two battery packs are connected in series in the distributed The B1 port of the full-on-line battery pack discharge test equipment is connected to the D-1 terminal and the safety circuit 3 connected in parallel with each other through the battery pack online test switch 13, the output of the DC-DC converter 12, the automatic current-limiting charging and One end of the equipotential connection safety control circuit 4 is connected, and the other end of the output is connected in parallel, that is, the D+1 end is connected to the D end, so that the second terminal B and the third terminal D of the distributed full-line battery pack discharge test equipment are connected in series. It is connected between the battery group I under test and the DC power distribution panel of the -48V communication power supply system, so that the battery group I under test is in the state of online capacity discharge test, and the other battery groups are kept in the normal state of online operation. At this time, the distributed full online The battery pack discharge test equipment system automatically completes the discharge test of the battery pack I under test to the online communication equipment according to the selection, function and parameter settings. In addition, the battery pack I under test is output to the "on-line test" via the battery pack online test switch 13 connected to the constant current discharge load intelligent control circuit 5, so that the battery pack under test is connected in parallel with the constant current discharge load intelligent control circuit 5 and the discharge load circuit 6 connected in series, as the online constant current discharge load circuit 6 of the battery pack under test. When the current discharge is working, the distributed all-on-line battery pack discharge test equipment system automatically controls the constant current discharge load intelligence according to the size of the battery pack I under test to the load discharge current of the online communication equipment (that is, the load current of the communication equipment). The control circuit 5 performs auxiliary adjustment to control the operating current of the discharge load 6, so as to ensure the online constant current discharge of the battery pack I under test.

Please refer to Figure 7, the online capacity discharge test process of the tested battery pack I, according to the test parameter settings, the constant current discharge test of the online capacity is carried out with the I discharge 1 current, when the load current of the online communication equipment and the floating charge current of the battery pack working online When the sum (I equipment+I floating charge current) is greater than the constant current discharge current I discharge 1 carried out by the battery pack I under test, the distributed full-line battery pack discharge test equipment system automatically controls the DC-DC converter 12 to automatically stabilize the battery pack. Current control output voltage U _O , increase the online output stable voltage U _online = U _{battery pack 1} + U ₀ , meet the working requirements of the tested battery pack I online to the communication equipment load constant current discharge test, automatically prohibit or turn off the constant current discharge load The intelligent control circuit 5 and the battery discharge load circuit 6 maintain a constant current to discharge the load of the online communication equipment. I discharge 1 = I _B1 = I _{D + 1} + I _A1 = I _{discharge D} + I _{floating charge} + I _{industrial control} + I _A ; (I _{B1 discharge} is the input operating current of the series-connected distributed full-line battery pack discharge test equipment, I _{discharge D} is the power supply current of the tested battery pack I to the communication equipment load, and I float is the float charge of other online working battery packs Working current; I _{industrial control} is the working current of the DC-DC host working power supply 1 in the distributed full-line battery pack discharge test equipment, and the DC-DC host working power supply 1 provides the working power supply of the relevant control unit 2; ID+1 is DC -The DC converter 12 outputs the working current; I _A is the sum of the operating currents that the battery pack 1 under test provides the input power supply to the DC-DC converter 12 and the constant current discharge load intelligent control circuit 5 and the battery pack discharge load circuit 6. At this time, I _{constant current load} = 0. _{I A} = I _{constant current load} + I _DC-DC = I _DC-DC ), the operating current of the online communication device I _device = I _rectifier + I _{discharge D} , at this time, it works normally The rectifier or high-frequency switching power supply output current I _rectifier is less than the communication equipment load operating current I _equipment ; under normal operating conditions, its -48V rectifier or high-frequency switching power supply output _current I The sum of the discharge current I _{discharge D} of the group I and the float charge current I _{float charge} of the battery pack working online. During the discharge process, the voltage of the battery pack I under test decreases with the prolongation of the discharge current and time, and the output voltage UO is automatically adjusted through the distributed full-line battery pack discharge test equipment to automatically stabilize the current control to increase the voltage of the battery pack I. On-line operating voltage, so that the battery pack I under test is subjected to a capacity discharge test at a constant current. When the sum of the load current of the online communication equipment and the floating charge current of the battery pack working online (I equipment + I float charge current) is less than the constant current discharge current Idischarge 1 of the battery pack I under test, the distributed all-on-line battery pack discharges The test equipment system automatically controls the DC-DC converter 12 with priority, controls the output voltage U _O with automatic steady flow, improves the online output stable voltage U _online = U _{battery pack 1} + U ₀ , and satisfies the priority of the online communication of the battery pack I under test. The device load is powered by a constant current, and at the same time 4 automatically limits the voltage and stabilizes the current value according to the actual online communication device load, automatically controls and adjusts the current of the auxiliary constant current discharge load intelligent control circuit 5 and the discharge load circuit 6, and keeps the battery pack I under test. Online constant current discharge. At this time, the battery pack I under test discharges the online communication equipment load and the control auxiliary constant current discharge load of the distributed full-line battery pack discharge test equipment system I _{discharge 1} = I _{B1 discharge} = I _{D + 1} + I _A1 = I _{Discharge D} + I _{floating charge} + I _{industrial control} + I _A = I _{discharge D} + I _{floating charge} + I _{industrial control} + I _{constant current load} + I _DC-DC ; I _A = I _{constant current load} + I _DC-DC ), online Communication equipment operating current I _equipment = I _{discharge D} . At this time, the normal working rectifier or high-frequency switching power supply output current I _rectifier is less than the communication equipment load operating current I _equipment and the discharge current I _{discharge 1} of the battery pack under test, and there is no current output. Under normal working conditions, its -48V rectifier or high-frequency switch output current I _rectifier is the communication equipment load operating current I _equipment , the battery pack I under test discharge current I _{discharge D} and the battery pack floating charge current I _float working online _Fill the sum. During the discharge process, the voltage of the battery pack I under test decreases with the prolongation of the discharge current and time, and the output voltage U _O is adjusted automatically by the distributed online battery pack charging and discharging capacity comprehensive maintenance and testing equipment. Increase the online working voltage so that the battery pack I under test is tested for discharge capacity with a constant current. Distributed full-line battery pack discharge test equipment for discharge test, with equipment online voltage limiting protection, overvoltage protection, low-voltage protection for battery pack discharge under test, low-voltage protection for single battery discharge termination, and battery discharge current limit and over-voltage protection stream protection. For specific parameter settings, the user can set according to the actual test requirements. In order to avoid user parameter setting errors, the distributed full-line battery pack discharge test equipment system also has a parameter setting upper limit protection function to ensure that the distributed full-line battery pack discharge test equipment The system is safe to use.

After the online discharge is completed, the connection principle of automatic charging to equipotential recovery and online work is shown in Figure 8:

After the online discharge test of the battery pack I under test is completed, the distributed all-on-line battery pack discharge test equipment system automatically controls the DC-DC converter 12 and the constant current discharge load and the intelligent control system circuit 5 is in the off state, IA=I _{industrial control} . At the same time, the distributed all-on-line battery pack discharge test equipment automatically controls the automatic current-limiting charging and equipotential connection safety control circuit 4 to enter the charging recovery process, and uses the system output voltage of the online -48V rectifier or high-frequency switching power supply equipment to test the battery pack. I carry out current-limited charging, -48V rectifier or switching power supply output current I _rectifier = I _equipment + I _{charging D} , the battery pack I charging current I _{B1 charging} = I _{charging D} - (I _{floating charge} + I _{industrial control} ), with With the prolongation of the charging current and time, the voltage of the battery pack I under test will also increase. When it is close to the same potential as the online voltage, the distributed full-line battery pack discharge test equipment system will intelligently diagnose its charging current and voltage. When the conditions are met, the distributed all-on-line battery pack discharge test equipment automatically controls the high-power static switch tube in the second safety protection circuit 10 to conduct, so that the system output voltage of the on-line -48V rectifier or high-frequency switching power supply equipment The battery pack under test is charged through the static switch tube of the power supply, and the equipotential safety connection is completed, and then the switching of the on-line test switch 13 of the battery pack is completed to restore the "online non-test" state, and the discharge test and recovery of the battery pack I under test are completed. The whole process of working online.

The battery packs are discharged online one by one, and the charging returns to the whole process of "online non-testing" working principle: After the distributed full-online battery pack discharge test equipment selects functions and parameters in the system program menu, the MCU unit program will automatically control the battery packs online. The test conversion control circuit drives and controls the on-line test switching switch 13 of the storage battery pack to perform the conversion and automatic control of the working modes of "on-line test" and "on-line non-test", perform online capacity discharge tests of the tested battery packs one by one, and automatically restore the online working state. As mentioned above, after the online discharge test of the battery pack I under test is completed, on the basis of the whole process of charging and equipotential recovery online, at the same time, the distributed full-line battery pack discharge test equipment monitors the online charging recovery of the battery pack I under test online. When the capacity is exceeded, it will automatically carry out the online discharge test for the next battery pack under test. Repeat the above working process (the principle is the same as above), and automatically complete the online discharge test and maintenance work of all online storage battery capacity one by one.

In the discharge work process as mentioned above, the online safety power supply of the battery pack 1 under test is protected by the double power supply safety protection of the safety protection circuit 3 and the second safety protection circuit 10; frequency switching power supply equipment) failure, causing other online battery packs to discharge to the online low-voltage phenomenon, so the high-power bidirectional power static switch tube in the second safety protection circuit 10 is positively connected to the online working power supply, and performs equipotential safety connection protection, and automatically close the output of the DC-DC converter 12 at the same time, ensuring that the battery pack 1 under test can be charged or discharged in real-time and uninterrupted safe power supply during the test process.

Working principle of online discharge in embodiment 2:

The second embodiment includes two situations. The application of the first situation is exactly the same as that of the first embodiment. For the principle, please refer to the description in the first embodiment. For the second one, please refer to Fig. 2 and Fig. 6. In the second case, the DC-DC converter 12, automatic current-limiting charging and self-recovery equipotential connection safety control and protection circuit 4, and 2 positive and negative connection common terminals connected in parallel to the safety protection circuit 3 (positive pole D+ 1 terminal, negative pole D-1 terminal) is opposite to that of Embodiment 1, making it suitable for the backup battery pack of +24V communication power supply. Therefore, the difference between the working principle of online discharge in the second case of the third embodiment and the first embodiment is that the direction of the current is opposite.

Working principle of online discharge in Embodiment 3:

The third embodiment also includes two situations, as shown in Figs. 9 and 10, and compared with Fig. 7 and Fig. 8, the difference between the working principle of the first case and the second embodiment is:

When discharging, the operating current output by the battery pack online test switch 13 in the second embodiment flows respectively to the DC-DC converter 12 and directly reaches the first terminal A, and passes through the series constant current The working current of the discharge load intelligent control circuit 5 and the discharge load circuit 6 directly reaches the first terminal A, while the working current output by the battery pack online test switching switch 13 in the third embodiment works through the forward and reverse polarity of the power supply. After the protection circuit 9 flows respectively to the DC-DC converter 12 and the series connected constant current discharge load intelligent control circuit 5, discharges the load circuit 6 and then flows into the forward and reverse polarity working protection circuit 9 of the power supply to reach the first Terminal A, the rest remain unchanged.

The current direction of the second case is opposite to that of the first case, and the rest are the same.

To sum up, the utility model distributed all-on-line battery pack discharge test equipment realizes the full-online unattended remote monitoring and management of the backup battery pack of the wireless communication base station power supply; it completely solves the problem that has long plagued the power supply maintenance management workers and on-site operators in the communication industry. The problem of maintenance personnel can timely control the capacity of all online battery packs on the existing network, improve the emergency communication support capability and resource scheduling management level, simplify the maintenance management process, improve work efficiency, save a lot of maintenance costs, and improve network operation security and comprehensiveness. Operation and maintenance management level.

Claims (9)

1. A distributed all-on-line battery pack discharge test equipment, characterized in that: comprising: A DC-DC main engine working power supply, a control unit, a battery pack on-line test switch, a second safety protection circuit, a battery pack on-line test conversion control circuit, a safety protection circuit connected in parallel, an automatic current-limiting charging and An equipotential bonding safety control circuit, a DC-DC converter, and a constant current discharge load intelligent control circuit and a discharge load circuit connected in series; The control unit further includes an MCU unit, and a current/voltage data acquisition and conversion control circuit, battery unit voltage detection equipment, data memory, remote communication circuit, LCD display and keyboard input all connected to the MCU unit ; After the input of the on-line test switch of the battery pack is connected in parallel with the corresponding input of the second safety protection circuit, it is connected to the online battery pack; and one output of the on-line test switch of the battery pack is connected to the output end of the second safety protection circuit , the other output is connected to one end connected in parallel with the safety protection circuit, automatic current-limiting charging and equipotential connection safety control circuit, and DC-DC converter; The output of the DC-DC host power supply in the device is connected to the constant current discharge load intelligent control circuit, the battery pack online test conversion control circuit and the control unit, and the input terminals of the DC-DC host power supply are connected to each other. One end is connected to the on-line test switching switch of the parallel battery pack and the output end of the second safety protection circuit, and the other end is connected to the DC-DC converter and one end of the public power supply of the discharge load circuit; The DC-DC converter is respectively connected with the current/voltage data acquisition and conversion control circuit and the MCU unit; The MCU unit is also respectively connected with the constant current discharge load intelligent control circuit, the automatic current limiting charging and equipotential connection safety control circuit, the battery pack online test switching switch, the second safety protection circuit, and the battery pack online test conversion control circuit ; The input of the working power supply of the DC-DC host in the device is connected to both ends of the online communication working power supply to provide normal working power supply. 2. A kind of distributed all-on-line storage battery pack discharge test equipment as claimed in claim 1, is characterized in that: also comprise a power forward and reverse polarity work protection circuit, the input of this power supply forward and reverse polarity work protection circuit It is connected with the on-line test switch of the battery pack, and the output is respectively connected with the constant current discharge load intelligent control circuit and the DC-DC converter. 3. A kind of distributed all-on-line battery pack discharge testing equipment as claimed in claim 1, characterized in that: said DC-DC converter, DC-DC host power supply, and said constant current discharge load intelligent control circuit are all It has the characteristics of forward and reverse polarity power supply. 4. A kind of distributed all-on-line battery pack discharge test equipment as claimed in claim 1, characterized in that: it also includes an AC/DC switching power supply, the input and output of the AC/DC switching power supply are respectively connected to the DC- DC host working power and mains. 5. A kind of distributed all-on-line battery pack discharge test equipment as claimed in claim 1, characterized in that: it also includes at least one current detection circuit, and each current detection circuit is coupled in the device to monitor the battery under test Each input terminal of the charge and discharge working power supply of the group. 6. A distributed full-on-line battery pack discharge testing device according to claim 5, characterized in that: the current detection circuit is a sensor. 7. A distributed all-on-line battery pack discharge testing device according to claim 1, characterized in that: the safety protection circuit is a high-power diode. 8. A distributed all-on-line battery pack discharge testing device as claimed in claim 1, characterized in that: the second safety protection circuit includes a high-power bidirectional power supply static switch tube, a DC contactor and a An automatic control and protection circuit for controlling and protecting the high-power bidirectional power supply static switch tube and the DC contactor, and the high-power bidirectional power supply static switch tube and the DC contactor are connected in parallel. 9. A distributed all-on-line battery pack discharge testing device as claimed in claim 1, characterized in that: said battery pack on-line test switching switch has the function of connecting first and then leaving, and said second safety protection circuit includes a A high-power bidirectional power supply static switch tube and an automatic control and protection circuit for controlling and protecting the operation of the high-power bidirectional power supply static switch tube. the

Images