CN217720753U - A battery pack current limiting device for during communication power supply discharge test - Google Patents
A battery pack current limiting device for during communication power supply discharge test Download PDFInfo
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- CN217720753U CN217720753U CN202220727138.1U CN202220727138U CN217720753U CN 217720753 U CN217720753 U CN 217720753U CN 202220727138 U CN202220727138 U CN 202220727138U CN 217720753 U CN217720753 U CN 217720753U
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Abstract
The utility model relates to the field of sludge treatment, and provides a device for limiting the inter-battery-pack current during a communication power supply discharge test, which comprises a DC/DC module, a first DC contactor, a second DC contactor and a manual bidirectional isolating switch; the first direct current contactor is mounted at the positive end of the parallel circuit of the first battery pack; the second direct current contactor is mounted at the positive end of the parallel circuit of the second battery pack; the DC/DC module, the first direct current contactor and the second direct current contactor form a parallel circuit; the DC/DC module and the communication power supply form a series circuit at the same time; the device also comprises a first circulation limiting mode, a second circulation limiting mode and a normal mode; the utility model discloses a set up the DCDC module, through the switching of control DCDC module to and the pressure differential between control DCDC output and first group battery or the second group battery, realized the current restriction, thereby the circulation between effective control first group battery and the second group battery.
Description
Technical Field
The utility model relates to a sludge treatment field especially indicates a battery pack current limiting device that is used for during communication power supply discharge test.
Background
In order to guarantee longer backup time, a communication power supply system of a large-scale communication station is generally hung with two groups of 48V batteries, and the two groups of batteries are connected with a direct-current bus in parallel in an isolation-free mode. According to the national standard, the storage batteries need to be subjected to discharge tests on time, and a communication power supply system with two groups of storage batteries hung below needs to be subjected to discharge tests group by group. The general method of the discharge test is to disconnect the target battery from the direct current bus and perform the discharge test, and after the discharge is finished, reconnect the direct current bus.
When the discharged storage battery is connected to the bus again, a large pressure difference exists between the discharged storage battery and the undischarged battery, and then an inter-group circulating current of hundreds of amperes is formed. The circulating current has the hazards of switch-on ignition, cable heating, extra loss of electric quantity and the like. The current limiting function of the communication power supply does not contribute to the circulating current between the battery packs.
SUMMERY OF THE UTILITY MODEL
The utility model provides a battery pack current limiting device for during communication power supply discharge test through
The technical scheme of the utility model is realized like this:
a device for limiting inter-battery-group current during a communication power supply discharge test,
the testing device for discharging comprises a communication power supply, an anode bus, a cathode bus, a first battery pack, a second battery pack and a load, wherein one end of the anode bus is connected with the anode of the communication power supply, the other end of the anode bus is connected with the load, one end of the cathode bus is connected with the cathode of the communication power supply, the other end of the cathode bus is connected with the load, the communication power supply, the anode bus, the load and the cathode bus form a series circuit, and the first battery pack and the second battery pack are connected with the load in parallel;
the limiting device comprises a DC/DC module, a first direct current contactor, a second direct current contactor and a manual bidirectional isolating switch;
the first direct current contactor is mounted at the positive end of the parallel circuit of the first battery pack;
the second direct current contactor is mounted at the positive end of the parallel circuit of the second battery pack;
the DC/DC module, the first direct current contactor and the second direct current contactor form a parallel circuit;
the DC/DC module and the communication power supply form a series circuit at the same time;
the manual bidirectional isolating switch is provided with a first position, a second position and a 0 position, the first position is connected with the first direct current contactor in parallel, and the second position is connected with the second direct current contactor in parallel;
the limiting device comprises a first circular current limiting mode, a second circular current limiting mode and a normal mode;
when the I position and the first direct current contactor are closed simultaneously, starting the first circulation limiting mode;
when the second position and the second direct current contactor are closed simultaneously, the second circulation limiting mode is started;
when the 0 bit is closed, the normal mode is initiated.
Further, in the normal mode, the manual bidirectional isolating switch is in a 0 position, the I position and the II position are in a normally closed state, the DC/DC module is in a starting state by default, and the output voltage of the communication power supply is lower than that of the positive bus;
meanwhile, the DC/DC module is in a bypass, the DC/DC module does not exist relative to the communication power supply, and the communication power supply carries out charging and discharging management on the battery pack according to a standard mode.
Further, the output voltage is a default voltage set in advance.
Further, the first circulation limiting mode is that the first battery pack is recharged after being discharged, when the first battery pack is discharged and needs to be connected to the direct current bus again, the manual bidirectional isolating switch is manually set to the I position, the manual bidirectional isolating switch is equal in potential to the first connecting line of the DC/DC module and the positive bus at the moment, and the DC/DC module controls the first direct current contactor to be disconnected after detecting that no pressure difference exists between the first connecting line and the positive bus; then, the battery fuse FU1 of the first battery pack is manually closed, the first battery pack is electrified, at the moment, the DC/DC module compares the voltage difference between the first connecting line and the positive bus, the output voltage of the communication power supply is adjusted, the current-limiting charging of the first battery pack is realized, and the second battery pack is limited from forming a circulating current on the first battery pack.
Further, in the process of charging the first battery pack, the voltage difference between the first connection line and the positive bus is smaller and smaller, when the DC/DC module detects that there is no voltage difference between the first connection line and the positive bus again, the first connection line and the positive bus control the first DC contactor to be switched on in a delayed manner, and at this time, the DC/DC module is bypassed, and the manual bidirectional isolating switch is manually restored to the 0 position.
Further, the second circulation limiting mode is that the second battery pack is recharged after being discharged, when the second battery pack is discharged and needs to be connected to the direct current bus again, the manual bidirectional isolating switch is manually placed at the position II, the manual bidirectional isolating switch is equal in potential to the first connecting line of the DC/DC module and the positive bus at the moment, and the DC/DC module controls the first direct current contactor to be disconnected after detecting that no pressure difference exists between the first connecting line and the positive bus; and then, manually closing a battery fuse FU1 of the second battery pack, electrifying the second battery pack, comparing the voltage difference between the first connecting line and the positive bus by the DC/DC module, adjusting the output voltage of the communication power supply, and realizing current-limiting charging of the second battery pack so as to limit the first battery pack from forming a circulating current on the second battery pack.
Furthermore, in the process of charging the second battery pack, the voltage difference between the first connection line and the positive bus is smaller and smaller, when the DC/DC module detects that there is no voltage difference between the first connection line and the positive bus again, the first connection line and the positive bus control the second DC contactor to be switched on in a delayed manner, and at this time, the DC/DC module is bypassed, and the manual bidirectional isolating switch is manually restored to the 0 position.
The utility model discloses a set up the DCDC module, through the switching of control DCDC module to and the pressure differential between control DCDC output and first group battery or the second group battery, realized the current restriction, thereby the circulation between effective control first group battery and the second group battery.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for a customer of ordinary skill in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a block diagram of an inter-battery-group current limiting apparatus used during a communication power supply discharge test according to an embodiment of the present invention;
fig. 2 is a diagram showing an operation state in a first circulation current limiting mode of the inter-battery-group current limiting apparatus for use during a discharge test of the communication power supply shown in fig. 1;
description of reference numerals: a communication power supply 11; a positive electrode bus bar 12; a load 13; a negative electrode bus bar 14; a first battery pack 15; a second battery pack 16; a DC/DC module 2 and a manual bidirectional isolating switch 3; i position 31; bit II, 32; 33 at position 0; a first direct current contactor 4 and a second direct current contactor 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the embodiment of the present invention, see fig. 1, a device for limiting inter-battery-pack current during a communication power supply discharge test,
the discharge test device comprises a communication power supply 11, an anode bus 12, a cathode bus 14, a first battery pack 15, a second battery pack 16 and a load 13, wherein one end of the anode bus 12 is connected with the anode of the communication power supply 11, the other end of the anode bus 12 is connected with the load 13, one end of the cathode bus 12 is connected with the cathode of the communication power supply 11, the other end of the cathode bus 12 is connected with the load 13, the communication power supply 11, the anode bus 12, the load 13 and the cathode bus 14 form a series circuit, and the first battery pack 15 and the second battery pack 16 are both connected with the load 13 in parallel;
the limiting device comprises a DC/DC module 2, a first direct current contactor 4, a second direct current contactor 5 and a manual bidirectional isolating switch 3;
the first dc contactor 4 is mounted on the positive terminal of the parallel circuit of the first battery pack 15;
the second dc contactor 5 is mounted on the positive terminal of the parallel circuit of the second battery pack 16;
the DC/DC module 2, the first direct current contactor 4 and the second direct current contactor 5 form a parallel circuit;
the DC/DC module 2 and the communication power supply 11 form a series circuit at the same time;
the manual bidirectional isolating switch 3 is provided with a first position 31, a second position 32 and a 0 position 33, the first position 31 is connected with the first direct current contactor 4 in parallel, and the second position 32 is connected with the second direct current contactor 5 in parallel;
the limiting device comprises a first circular current limiting mode, a second circular current limiting mode and a normal mode;
when the I position and the first direct current contactor are closed simultaneously, starting the first circulation limiting mode;
when the second position and the second direct current contactor are closed simultaneously, starting the second circulation limiting mode;
when the 0 bit is closed, the normal mode is initiated.
In the specific embodiment of the present invention, as shown in fig. 1, the normal mode is that the manual bidirectional isolating switch is at 0 position, the i position and the ii position are in a normally closed state, the DC/DC module is in a power-on state by default, and the output voltage of the communication power supply is lower than that of the positive bus;
meanwhile, the DC/DC module is in a bypass, the DC/DC module does not exist relative to the communication power supply, and the communication power supply carries out charging and discharging management on the battery pack according to a standard mode.
In an embodiment of the present invention, see fig. 1, the output voltage is a default voltage set in advance.
In a specific embodiment of the present invention, as shown in fig. 2, the first circulation limiting mode is that the first battery pack is recharged after being discharged, when the first battery pack is discharged and needs to be reconnected to the DC bus, the manual bidirectional isolation switch is manually placed at the i position, and at this time, the manual bidirectional isolation switch is at the same potential as the first connection line of the DC/DC module and the positive bus, and the DC/DC module controls the first DC contactor to be disconnected after detecting that the first connection line has no pressure difference with the positive bus; then, the battery fuse FU1 of the first battery pack is manually closed, the first battery pack is electrified, at the moment, the DC/DC module compares the voltage difference between the first connecting line and the positive bus, the output voltage of the communication power supply is adjusted, the current-limiting charging of the first battery pack is realized, and the second battery pack is limited from forming a circulating current on the first battery pack.
In the specific embodiment of the utility model, see fig. 1 the in-process that first group battery was charged, first connecting line 34 and the pressure differential of anodal generating line are littleer and littleer, work as the DC/DC module detects once more when first connecting line and anodal generating line do not have pressure differential, first connecting line 34 and the first DC contactor switch-on of anodal generating line time delay control, at this moment, the DC/DC module is by the bypass, and is manual will manual two-way isolator resumes 0 bit.
In a specific embodiment of the present invention, as shown in fig. 1, the second circulation limiting mode is that the second battery pack is recharged after being discharged, when the second battery pack is discharged and needs to be reconnected to the DC bus, the manual bidirectional isolation switch is manually placed at position ii, and then the manual bidirectional isolation switch is equipotential with the first connection line of the DC/DC module and with the positive bus, and the DC/DC module controls the first DC contactor to be disconnected after detecting that there is no pressure difference between the first connection line 34 and the positive bus; and then, manually closing a battery fuse FU1 of the second battery pack, electrifying the second battery pack, comparing the voltage difference between the first connecting circuit and the positive bus by the DC/DC module, adjusting the output voltage of the communication power supply, and realizing the current-limiting charging of the second battery pack so as to limit the first battery pack from forming a circular current to the second battery pack.
The utility model discloses an in the concrete embodiment, see figure 1 the second group battery carries out the in-process that charges, the pressure differential of first connecting line and positive bus is littleer and littleer, works as the DCDC module detects once more when first connecting line does not have pressure differential with positive bus, first connecting line and the switch-on of positive bus time delay control second direct current contactor, at this moment, the DCDC module is by the bypass, and is manual will manual two-way isolator resumes 0 position.
The current is limited by arranging the DC/DC module, controlling the switching of the DC/DC module and controlling the pressure difference between the DC/DC output and the first battery pack or the second battery pack, so that the circulation current between the first battery pack and the second battery pack is effectively controlled.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A device for limiting inter-battery pack current during a communication power supply discharge test comprises a communication power supply, a positive bus, a negative bus, a first battery pack, a second battery pack and a load, wherein one end of the positive bus is connected with the positive pole of the communication power supply, the other end of the positive bus is connected with the load, one end of the negative bus is connected with the negative pole of the communication power supply, the other end of the negative bus is connected with the load, the communication power supply, the positive bus, the load and the negative bus form a series circuit, and the first battery pack and the second battery pack are connected with the load in parallel;
the method is characterized in that: the limiting device comprises a DC/DC module, a first direct current contactor, a second direct current contactor and a manual bidirectional isolating switch;
the first direct current contactor is mounted at the positive end of the parallel circuit of the first battery pack;
the second direct current contactor is mounted at the positive end of the parallel circuit of the second battery pack;
the DC/DC module, the first direct current contactor and the second direct current contactor form a parallel circuit;
the DC/DC module and the communication power supply form a series circuit at the same time;
the manual bidirectional isolating switch is provided with a first position, a second position and a 0 position, the first position is connected with the first direct current contactor in parallel, and the second position is connected with the second direct current contactor in parallel;
the limiting device comprises a first circular current limiting mode, a second circular current limiting mode and a normal mode;
when the I position and the first direct current contactor are closed simultaneously, the first circulation limiting mode is started;
when the second position and the second direct current contactor are closed simultaneously, the second circulation limiting mode is started;
when the 0 bit is closed, the normal mode is initiated.
2. The inter-battery-group current limiting apparatus for use during a communication power supply discharge test as recited in claim 1, wherein: the normal mode is that the manual bidirectional isolating switch is at 0 position, the I position and the II position are in a normally closed state, the DC/DC module is in a starting state by default, and the output voltage of the communication power supply is lower than that of the positive bus;
meanwhile, the DC/DC module is in a bypass, the DC/DC module does not exist relative to the communication power supply, and the communication power supply carries out charging and discharging management on the battery pack according to a standard mode.
3. The inter-battery-group current limiting apparatus for use during a communication power supply discharge test as recited in claim 2, wherein: the output voltage is a default voltage set in advance.
4. The inter-battery-group current limiting apparatus for use during a communication power supply discharge test as recited in claim 1, wherein: the first circulation limiting mode is that the first battery pack is recharged after being discharged, when the first battery pack is discharged and needs to be connected with a direct current bus again, the manual bidirectional isolating switch is manually placed at the I position, the manual bidirectional isolating switch is equal in potential to a first connecting line of the DC/DC module and a positive bus at the moment, and the DC/DC module controls the first direct current contactor to be disconnected after detecting that the first connecting line is not in pressure difference with the positive bus; then, the battery fuse FU1 of the first battery pack is manually closed, the first battery pack is electrified, at the moment, the DC/DC module compares the voltage difference between the first connecting line and the positive bus, the output voltage of the communication power supply is adjusted, the current-limiting charging of the first battery pack is realized, and the second battery pack is limited from forming a circulating current on the first battery pack.
5. The inter-battery-group current limiting apparatus for use during a communication power supply discharge test as recited in claim 4, wherein: when the DC/DC module detects that the voltage difference between the first connecting line and the positive bus is zero again, the first connecting line and the positive bus control the first direct current contactor to be switched on in a delayed mode, and at the moment, the DC/DC module is bypassed, and the manual bidirectional isolating switch is manually restored to 0 position.
6. The inter-battery-group current limiting apparatus for use during a communication power supply discharge test as recited in claim 2, wherein: the second circulation limiting mode is that the second battery pack is recharged after being discharged, when the second battery pack is discharged and needs to be connected with the direct current bus again, the manual two-way isolating switch is manually placed at the II position, the manual two-way isolating switch is equal in potential to the first connecting line of the DC/DC module and the positive bus at the moment, and the DC/DC module controls the first direct current contactor to be disconnected after detecting that the first connecting line is not in pressure difference with the positive bus; and then, manually closing a battery fuse FU1 of the second battery pack, electrifying the second battery pack, comparing the voltage difference between the first connecting line and the positive bus by the DC/DC module, adjusting the output voltage of the communication power supply, and realizing current-limiting charging of the second battery pack so as to limit the first battery pack from forming a circulating current on the second battery pack.
7. The inter-battery-group current limiting apparatus for use during a communication power supply discharge test as recited in claim 6, wherein: and in the process of charging the second battery pack, the pressure difference between the first connecting line and the positive bus is smaller and smaller, when the DC/DC module detects that the pressure difference between the first connecting line and the positive bus is zero again, the first connecting line and the positive bus control the second direct current contactor to be switched on in a delayed mode, and at the moment, the DC/DC module is bypassed, and the manual bidirectional isolating switch is manually restored to the 0 position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220727138.1U CN217720753U (en) | 2022-09-06 | 2022-09-06 | A battery pack current limiting device for during communication power supply discharge test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220727138.1U CN217720753U (en) | 2022-09-06 | 2022-09-06 | A battery pack current limiting device for during communication power supply discharge test |
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| CN217720753U true CN217720753U (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220727138.1U Active CN217720753U (en) | 2022-09-06 | 2022-09-06 | A battery pack current limiting device for during communication power supply discharge test |
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| CN (1) | CN217720753U (en) |
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- 2022-09-06 CN CN202220727138.1U patent/CN217720753U/en active Active
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