CN110829405A - Reverse connection prevention protection circuit and communication power supply equipment - Google Patents
Reverse connection prevention protection circuit and communication power supply equipment Download PDFInfo
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- CN110829405A CN110829405A CN201810922388.9A CN201810922388A CN110829405A CN 110829405 A CN110829405 A CN 110829405A CN 201810922388 A CN201810922388 A CN 201810922388A CN 110829405 A CN110829405 A CN 110829405A
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- power supply
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- battery pack
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The embodiment of the invention discloses a reverse connection prevention protection circuit and communication power supply equipment, which are used for avoiding equipment damage caused by reverse connection of a positive electrode and a negative electrode of a storage battery pack. The reverse connection prevention protection circuit is connected between a rectifier module and a storage battery pack of a power supply system, and comprises: the control switch, the detection circuit and the control circuit; the control switch is connected to a connecting line between the negative electrode of the rectifying module and the output end of the battery switch; the detection circuit is connected between the positive pole of the power supply system and the input end of the battery switch or between the positive pole of the power supply system and the output end of the battery switch, and is used for disconnecting the control circuit when the positive pole and the negative pole of the storage battery pack are detected to be reversely connected; the control circuit is connected between the positive pole of the power supply system and the negative pole of the rectification module and used for controlling the control switch to be switched off when the control circuit is in an open circuit state.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to an anti-reverse-connection protection circuit and communication power supply equipment.
Background
The communication power supply equipment is heart of the communication system, stable and reliable, and is the key for ensuring the safe and reliable operation of the communication system. Once the power supply of the communication power supply device is interrupted, the communication system cannot operate, and great loss is caused. Therefore, at present, communication power supply equipment is usually uninterruptible power supply equipment, and the communication power supply equipment not only comprises a rectifier module, but also comprises a storage battery pack.
In the prior art, the anode and the cathode of the rectifier module are directly connected with the anode and the cathode of the storage battery pack, when the storage battery pack is installed in a power supply system, if the anode and the cathode of the storage battery pack are reversely connected with the anode and the cathode of the rectifier module, a short circuit loop is formed between the storage battery pack and the rectifier module if a switch of the storage battery pack is closed, and large current can be generated in the loop to damage equipment or even cause fire.
In summary, when the battery pack is installed in the power supply system in the prior art, if the positive electrode and the negative electrode of the battery pack are connected in reverse, a short circuit loop is formed between the battery pack and the rectifier module when the battery pack is switched on and off, and a large current is generated in the loop to damage equipment.
Disclosure of Invention
The embodiment of the invention provides a reverse connection prevention protection circuit and communication power supply equipment, which are used for avoiding equipment damage caused by reverse connection of a positive electrode and a negative electrode of a storage battery pack.
The technical scheme of the embodiment of the invention is as follows:
an anti-reverse connection protection circuit connected between a rectifier module and a storage battery pack of a power supply system, comprising: the control switch, the detection circuit and the control circuit; wherein the content of the first and second substances,
the control switch is connected to a connecting wire between the negative electrode of the rectifying module and the output end of the battery switch, and the battery switch is used for performing short-circuit protection and overload protection on the storage battery pack;
the detection circuit is connected between the positive pole of the power supply system and the input end of the battery switch or between the positive pole of the power supply system and the output end of the battery switch and is used for disconnecting the control circuit when the positive pole and the negative pole of the storage battery pack are detected to be reversely connected;
and the control circuit is connected between the positive pole of the power supply system and the negative pole of the rectification module and is used for controlling the disconnection of the control switch when the control circuit is in an open circuit state.
The communication power supply equipment comprises a rectifying module and a storage battery pack, wherein the reverse connection prevention protection circuit provided by the embodiment of the invention is connected between the rectifying module and the storage battery pack.
According to the technical scheme of the embodiment of the invention, the control switch is arranged on the connecting line between the negative electrode of the rectifying module and the output end of the battery switch, so that the control circuit can be disconnected when the reverse connection of the positive electrode and the negative electrode of the storage battery pack is detected, the control circuit controls the disconnection of the control switch arranged on the connecting line between the negative electrode of the rectifying module and the output end of the battery switch, a short circuit loop is prevented from being formed between the storage battery pack and the rectifying module, and the equipment damage caused by the reverse connection of the positive electrode and the negative electrode of the storage battery pack is avoided.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Fig. 1 is a schematic circuit structure diagram of an anti-reverse connection protection circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit structure diagram of another reverse connection protection circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit structure diagram of another reverse connection protection circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit structure diagram of another reverse connection protection circuit according to an embodiment of the present invention.
Detailed Description
Embodiments of the present application will be described with reference to the accompanying drawings, and it should be understood that the embodiments described herein are merely illustrative and explanatory of the application and are not restrictive of the application.
The embodiment of the invention provides an anti-reverse connection protection circuit and communication power supply equipment, aiming at the problem that equipment is damaged due to reverse connection of the anode and the cathode of a storage battery pack when the storage battery pack is installed in a power supply system in the prior art.
It should be noted that the reverse connection prevention protection circuit provided in the embodiment of the present invention is not only applicable to the communication power supply device mentioned in the embodiment of the present invention, but also applicable to other uninterruptible power supply devices.
The reverse connection prevention protection circuit and the communication power supply device provided by the embodiment of the invention are described in detail below with reference to the accompanying drawings.
The embodiment of the invention provides an anti-reverse connection protection circuit, which is connected between a rectifier module and a storage battery pack of a power supply system, and comprises: control switch, detection circuitry and control circuit.
And the control switch is connected to a connecting wire between the negative electrode of the rectifying module and the output end of the battery switch.
The battery switch is used for performing short-circuit protection and overload protection on the storage battery pack. One end of the battery switch is connected with the storage battery pack, the end is the input end of the battery switch, and the other end of the battery switch is the output end of the battery switch.
It should be noted that, in the embodiment of the present invention, the positive electrode of the rectifier module is used as the positive electrode of the power supply system. When the positive pole and the negative pole of the storage battery pack are correctly connected, the positive pole of the storage battery pack is connected with the positive pole of the power supply system.
And the detection circuit is connected between the positive pole of the power supply system and the input end of the battery switch or between the positive pole of the power supply system and the output end of the battery switch. The detection circuit is used for switching off the control circuit when detecting that the positive electrode and the negative electrode of the storage battery pack are reversely connected.
And the control circuit is connected between the anode of the power supply system and the cathode of the rectification module, namely one end of the control circuit is connected with the anode of the power supply system, and the other end of the control circuit is connected with the cathode of the rectification module. The control circuit is used for controlling the disconnection control switch when the control circuit is in an open circuit state.
Of course, the detection circuit is also used for switching on the control circuit when the positive electrode and the negative electrode of the storage battery pack are detected to be correctly connected. The control circuit is also used for controlling the closing of the control switch when the control circuit is a passage.
When the embodiment of the invention is implemented, the following two implementation modes can be adopted according to the connection mode of the detection circuit in the reverse connection prevention protection circuit.
Implementation mode one
As shown in fig. 1, the reverse connection prevention protection circuit is connected between a battery pack 11 and a rectifier module 12 of the communication power supply device, and specifically includes: a control switch 13, a detection circuit 14 and a control circuit 15.
And a control switch 13 connected to a connection line between the output terminal of the battery switch 16 and the negative electrode of the rectifier module 12. And a detection circuit 14 connected between the positive electrode of the power supply system and the output terminal of the battery switch 16, for turning off the control circuit 15 when the reverse connection of the positive electrode and the negative electrode of the secondary battery pack 11 is detected. And the control circuit 15 is connected between the positive electrode of the power supply system and the negative electrode of the rectifying module 12 and is used for controlling the control switch 13 to be switched off when the control circuit 15 is in an open circuit state.
Specifically, the detection circuit 14 includes: the first relay K1 and the diode D1 are connected in series, the anode of the diode D1 is connected with the anode of the power supply system through the coil of the first relay K1, the cathode of the diode D1 is connected with the output end of the battery switch 16, and the contact of the first relay K1 is connected in the control circuit 15. The first relay K1 is a normally open relay.
Of course, in other embodiments of the present invention, the connection positions of the first relay K1 and the diode D1 in the detection circuit 14 may be interchanged, that is, the anode of the diode D1 is connected to the anode of the power supply system, and the cathode of the diode D1 is connected to the output terminal of the battery switch 16 through the coil of the first relay K1.
The control circuit 15 includes: the contact of the second relay K2 connected in series with the contact of the first relay K1, the coil of the contactor KM1, and the contact of the contactor KM1 serve as the control switch 13. The second relay K2 is a normally closed relay, and the contactor KM1 is a normally open contactor.
In another embodiment of the present invention, as shown in fig. 2, the control circuit 15 includes: the contact of the second relay K2, the coil of the contactor KM1 and at least one diode (diode D2 and diode D3 shown in fig. 2) connected in series with the contact of the first relay K1, the anodes of all diodes being connected to the anode of the power supply system, the cathodes of all diodes being connected to the cathode of the rectifier module 12, the contact of the contactor KM1 acting as the control switch 13. The second relay K2 is a normally closed relay, and the contactor KM1 is a normally open contactor.
Of course, it should be noted that, in the embodiment shown in fig. 2, the control circuit 15 includes two diodes, that is, the diode D2 and the diode D3, in other embodiments of the present invention, the control circuit 15 may include only one diode, and may also include more than two diodes.
In the embodiment shown in fig. 2, the anode of the diode D2 is connected to the anode of the power supply system through the contact of the second relay K2 and the coil of the contactor KM1, and the cathode of the diode D2 is connected to the cathode of the rectifier module 12 through the contact of the first relay K1 and the diode D3; the anode of the diode D3 is connected with the anode of the power supply system through the contact of the first relay K1, the contact of the diode D2, the contact of the second relay K2 and the coil of the contactor KM1, and the cathode of the diode D3 is connected with the cathode of the rectifier module 12.
In other embodiments of the present invention, the diode in the control circuit 15 may be connected at any position in the control circuit, and is not limited to the connection position of the diode D2 and the diode D3 shown in fig. 2, only that the anode of the diode is finally connected to the anode of the power supply system, and the cathode of the diode is finally connected to the cathode of the rectifier module 12.
In the reverse connection prevention protection circuit shown in fig. 1 or fig. 2, when the positive electrode and the negative electrode of the battery pack 11 are correctly connected, if the battery switch 16 is closed, the positive electrode and the negative electrode of the battery pack 11 are correctly connected, the diode D1 in the detection circuit 14 is turned on, and the contact of the first relay K1 in the detection circuit 14 is closed.
After the contact of the first relay K1 is attracted, the control circuit 15 is switched on, at the moment, the contactor KM1 in the control circuit 15 gets power from the rectifying module 12, the control circuit 15 is a passage, current exists in a coil of the contactor KM1, the contact of the contactor KM1 is closed, namely the control switch 13 is closed, and the storage battery pack 11 is connected with the rectifying module 12.
When the positive electrode and the negative electrode of the battery pack 11 are reversely connected, if the battery switch 16 is closed, the positive electrode and the negative electrode of the battery pack 11 are reversely connected, and therefore, the diode D1 in the detection circuit 14 cannot be turned on, and the contact of the first relay K1 in the detection circuit 14 is kept in an open state.
The contact of the first relay K1 is opened, the control circuit 15 is open circuit, at this time, no current flows in the coil of the contactor KM1 in the control circuit 15, the contact of the contactor KM1 keeps an open state, that is, the control switch 13 is opened, and the battery pack 11 cannot be connected with the rectifier module 12.
After the battery pack 11 is connected to the rectifier module 12, if the rectifier module 12 cannot supply power, for example, if an ac power (not shown in fig. 1 and 2) connected to the rectifier module 12 fails, the battery pack 11 supplies power at this time.
When the battery pack 11 supplies power to the load device, in order to protect the battery and prevent the battery pack 11 from deep discharging, the embodiment of the invention may open the contact of the second relay K2 by controlling the second relay K2 to act when detecting that the voltage of the battery pack 11 is lower than the preset voltage threshold. After the contact of the second relay K2 is opened, the control circuit 15 is an open circuit, at this time, no current flows in the coil of the contactor KM1 of the contactor KM1, the contact of the contactor KM1 is opened, the storage battery pack 11 is disconnected from the rectifier module 12, and the storage battery pack 11 no longer supplies power to the load equipment. The preset voltage threshold may be set according to an empirical value.
In the reverse connection prevention protection circuit shown in fig. 1 or fig. 2, the contact of the contactor KM1 is in an off state initially, and whether to control the contact of the contactor KM1 to be closed is judged by detecting the connection mode of the positive electrode and the negative electrode of the battery pack 11 through the detection circuit 14. Specifically, when the detection circuit 14 detects that the positive electrode and the negative electrode of the storage battery pack are correctly connected and the rectifier module 12 is powered on, the contact of the contactor KM1 is controlled to be attracted, and the storage battery pack 11 is connected with the rectifier module 12; when the detection circuit 14 detects that the positive electrode and the negative electrode of the storage battery pack are reversely connected, the contact of the control contactor KM1 is kept disconnected, and the storage battery pack 11 cannot be connected with the rectifier module 12, so that equipment damage caused by the reverse connection of the positive electrode and the negative electrode of the storage battery pack is effectively avoided.
Second embodiment
As shown in fig. 3, the reverse connection prevention protection circuit is connected between the battery pack 21 and the rectifier module 22 of the communication power supply device, and specifically includes: a control switch 23, a detection circuit 24, and a control circuit 25.
And a control switch 23 connected to a connection line between the output terminal of the battery switch 26 and the negative electrode of the rectifier module 22. And a detection circuit 24 connected between the positive electrode of the power supply system and the input terminal of the battery switch 26 for turning off the control circuit 25 when the reverse connection of the positive electrode and the negative electrode of the secondary battery pack 21 is detected. And a control circuit 25 connected between the positive electrode of the power supply system and the negative electrode of the rectifier module 22, for controlling the off control switch 23 when the control circuit 25 is open.
Specifically, the detection circuit 24 includes a third relay K3 and a diode (a diode D4 and a diode D5 shown in fig. 3) connected in series, a cathode of the diode is connected to an anode of the power supply system via a coil of the third relay K3, an anode of the diode is connected to an input terminal of the battery switch 26, and a contact of the third relay K3 is connected in the control circuit 25. The third relay K3 is a normally closed relay.
When there are a plurality of battery packs included in the battery pack 21, a plurality of diodes may be provided in the detection circuit 24, and one diode may be provided for each battery pack.
For example, in the battery pack 21 shown in fig. 3 including two battery packs, one diode is provided individually for each battery pack in the detection circuit 24, and two diodes, that is, the diode D4 and the diode D5, are provided in total.
The control circuit 25 includes: the contact of the fourth relay K4 connected in series with the contact of the third relay K3, the coil of the contactor KM2, and the contact of the contactor KM2 serve as the control switch 23. The fourth relay K4 is a normally closed relay, and the contactor KM2 is a normally open contactor.
In another embodiment of the present invention, as shown in fig. 4, the control circuit 25 includes: the contact of the fourth relay K4, the coil of the contactor KM2 and at least one diode (diode D6 and diode D7 shown in fig. 4) connected in series with the contact of the third relay K3, the anodes of all diodes being connected to the anode of the power supply system, the cathodes of all diodes being connected to the cathode of the rectifier module 22, the contact of the contactor KM2 acting as the control switch 23. The fourth relay K4 is a normally closed relay, and the contactor KM2 is a normally open contactor.
Of course, it should be noted that in the embodiment shown in fig. 4, the control circuit 25 includes two diodes, that is, the diode D6 and the diode D7, in other embodiments of the present invention, the control circuit 25 may include only one diode, and may also include more than two diodes.
In the embodiment shown in fig. 4, the anode of the diode D6 is connected to the anode of the power supply system through the contact of the fourth relay K4 and the coil of the contactor KM2, and the cathode of the diode D6 is connected to the cathode of the rectifier module 22 through the contact of the third relay K3 and the diode D7; the anode of the diode D7 is connected with the anode of the power supply system through the contact of the third relay K3, the contact of the diode D6, the contact of the fourth relay K4 and the coil of the contactor KM2, and the cathode of the diode D7 is connected with the cathode of the rectifier module 22.
In other embodiments of the present invention, the diode in the control circuit 25 may be connected at any position in the control circuit, and is not limited to the connection position of the diode D6 and the diode D7 shown in fig. 4, only that the anode of the diode is finally connected to the anode of the power system, and the cathode of the diode is finally connected to the cathode of the rectifying module 22.
In the reverse connection prevention protection circuit shown in fig. 3 or 4, when the positive electrode and the negative electrode of the secondary battery pack 21 are correctly connected, the diode D4 and the diode D5 are not conductive, and the contact of the third relay K3 in the detection circuit 24 is kept in a closed state.
When the contact of the third relay K3 is kept in a closed state, the control circuit 25 is switched on, at this time, the contactor KM2 in the control circuit 25 takes power from the rectifier module 22, current exists in the coil of the contactor KM2 in the control circuit 25, the contact of the contactor KM2 is closed, that is, the control switch 23 is closed, and at this time, if the battery switch 26 is closed, the battery pack 21 is connected with the rectifier module 22.
When the positive electrode and the negative electrode of the battery pack 21 are reversely connected, the diode D4 and/or the diode D5 are/is turned on, and the contact of the third relay K3 in the detection circuit 24 is opened. When the contact of the third relay K3 is opened, the control circuit 25 is opened, and at this time, no current flows in the coil of the contactor KM2 in the control circuit 25, and the contact of the contactor KM2 is kept in an open state, that is, the control switch 23 is opened, and at this time, even if the battery switch 26 is closed, the battery pack 21 cannot be connected to the rectifier module 22.
After the battery pack 21 is connected to the rectifier module 22, if the rectifier module 22 fails to supply power, for example, if an ac power (not shown in fig. 3 and 4) connected to the rectifier module 22 fails, the battery pack 21 supplies power at this time.
In order to protect the battery pack 11 and prevent the battery pack 11 from deep discharging when the battery pack 11 supplies power to the load device, the embodiment of the present invention may open the contact of the fourth relay K4 by controlling the fourth relay K4 to operate when it is detected that the voltage of the battery pack 21 is lower than the preset voltage threshold. After the contact of the fourth relay K4 is disconnected, the control circuit 25 is disconnected, at this time, no current flows in the coil of the contactor KM2, the contact of the contactor KM2 is disconnected, the storage battery pack 21 is disconnected from the rectifier module 22, and the storage battery pack 21 no longer supplies power to the load equipment. The preset voltage threshold may be set according to an empirical value.
In the reverse connection prevention protection circuit shown in fig. 3 or fig. 4, the contact of the contactor KM2 is in an open state initially, and when the rectifier module 22 is powered, the contact of the contactor KM2 is closed. Under the condition that the contact of the contactor KM2 is closed, after the storage battery pack 21 is installed in a power supply system, the detection circuit 24 detects the connection mode of the positive electrode and the negative electrode of the storage battery pack 21, and judges whether to control the contact of the contactor KM2 to be disconnected. Specifically, when the detection circuit 24 detects that the positive electrode and the negative electrode of the storage battery pack 21 are correctly connected, the contact of the control contactor KM2 keeps attracting, at this time, the battery switch 26 is closed, and the storage battery pack 21 is connected with the rectification module 22; when the detection circuit 24 detects that the positive electrode and the negative electrode of the storage battery pack 21 are reversely connected, the contact of the control contactor KM2 is disconnected, the battery switch 26 is closed, and the storage battery pack 21 cannot be connected with the rectifying module 22 due to the disconnection of the contact of the contactor KM2, so that the damage of equipment caused by the reverse connection of the positive electrode and the negative electrode of the storage battery pack is effectively avoided.
Based on the same inventive concept, the embodiment of the invention also provides communication power supply equipment, wherein the communication power supply equipment comprises a rectifying module and a storage battery pack, and the reverse connection prevention protection circuit provided by the embodiment of the invention is connected between the rectifying module and the storage battery pack.
According to the communication power supply equipment provided by the embodiment of the invention, when the reverse connection prevention protection circuit is connected between the storage battery pack and the rectification module, the control switch is arranged on the connecting line between the output end of the battery switch and the negative electrode of the rectification module, so that the control circuit can be disconnected when the reverse connection of the positive electrode and the negative electrode of the storage battery pack is detected, the control circuit controls the disconnection of the control switch arranged on the connecting line between the output end of the battery switch and the negative electrode of the rectification module, a short circuit loop is prevented from being formed between the storage battery pack and the rectification module, and the equipment damage caused by the reverse connection of the positive electrode and the negative electrode of the storage battery pack is avoided.
In summary, according to the technical solution of the embodiment of the present invention, the control switch is disposed on the connection line between the negative electrode of the rectifier module and the output end of the battery switch, so that the control circuit can be turned off when the reverse connection between the positive electrode and the negative electrode of the battery pack is detected, and then the control circuit controls the turn-off of the control switch disposed on the connection line between the negative electrode of the rectifier module and the output end of the battery switch, thereby preventing a short circuit from being formed between the battery pack and the rectifier module, and preventing the damage to the device caused by the reverse connection between the positive electrode and the negative electrode of the battery pack.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. An anti-reverse connection protection circuit is connected between a rectifier module and a storage battery pack of a power supply system, and is characterized by comprising: the control switch, the detection circuit and the control circuit; wherein the content of the first and second substances,
the control switch is connected to a connecting line between the negative electrode of the rectifying module and the output end of the battery switch, and the battery switch is used for performing short-circuit protection and overload protection on the storage battery pack;
the detection circuit is connected between the positive pole of the power supply system and the input end of the battery switch or between the positive pole of the power supply system and the output end of the battery switch, and is used for disconnecting the control circuit when the positive pole and the negative pole of the storage battery pack are detected to be reversely connected;
the control circuit is connected between the positive pole of the power supply system and the negative pole of the rectification module and used for controlling the control switch to be switched off when the control circuit is in an open circuit state.
2. The reverse-connection prevention protection circuit according to claim 1, wherein the detection circuit is further configured to switch on the control circuit when the positive electrode and the negative electrode of the storage battery pack are detected to be correctly connected;
the control circuit is also used for controlling the control switch to be closed when the control circuit is a passage.
3. The reverse-connection prevention protection circuit according to claim 1 or 2, wherein the detection circuit comprises a first relay and a diode connected in series, an anode of the diode is connected with an anode of the power supply system through a coil of the first relay, a cathode of the diode is connected with an output end of the battery switch, and a contact of the first relay is connected in the control circuit.
4. The reverse-connection prevention protection circuit according to claim 3, wherein the control circuit comprises: and the contact of the contactor is used as the control switch.
5. The reverse-connection prevention protection circuit according to claim 3, wherein the control circuit comprises: the positive poles of all the diodes are connected with the positive pole of the power supply system, the negative poles of all the diodes are connected with the negative pole of the rectifier module, and the contact of the contactor is used as the control switch.
6. The reverse-connection prevention protection circuit according to claim 3, wherein the first relay is a normally-open relay.
7. The reverse-connection prevention protection circuit according to claim 1 or 2, wherein the detection circuit comprises a third relay and a diode connected in series, a cathode of the diode is connected with an anode of the power supply system through a coil of the third relay, an anode of the diode is connected with an input end of the battery switch, and a contact of the third relay is connected in the control circuit.
8. The reverse-connection prevention protection circuit according to claim 7, wherein the control circuit comprises: and the contact of the contactor is used as the control switch.
9. The reverse-connection prevention protection circuit according to claim 7, wherein the control circuit comprises: the contact of the fourth relay, the coil of the contactor and at least one diode are connected with the contact of the third relay in series, the anodes of all the diodes are connected with the anode of the power supply system, the cathodes of all the diodes are connected with the cathode of the rectifier module, and the contact of the contactor is used as the control switch.
10. The reverse-connection prevention protection circuit according to claim 7, wherein the third relay is a normally-closed relay.
11. Reverse-connection protection circuit according to claim 4, 5, 8 or 9, characterized in that said contactor is a normally open contactor.
12. A communication power supply device, characterized in that the communication power supply device comprises a rectifying module and a storage battery pack, wherein the rectifying module and the storage battery pack are connected with the reverse connection prevention protection circuit according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810922388.9A CN110829405B (en) | 2018-08-14 | 2018-08-14 | Reverse connection prevention protection circuit and communication power supply equipment |
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| CN201810922388.9A CN110829405B (en) | 2018-08-14 | 2018-08-14 | Reverse connection prevention protection circuit and communication power supply equipment |
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| CN110829405A true CN110829405A (en) | 2020-02-21 |
| CN110829405B CN110829405B (en) | 2021-11-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111446644A (en) * | 2020-05-13 | 2020-07-24 | 广州市锦路电气设备有限公司 | Battery switch box with protection for preventing reverse connection of battery pack and UPS positive and negative poles |
| CN112114276A (en) * | 2020-07-10 | 2020-12-22 | 青岛海信电子产业控股股份有限公司 | Control circuit, control panel, electric equipment and control method |
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| CN112114276A (en) * | 2020-07-10 | 2020-12-22 | 青岛海信电子产业控股股份有限公司 | Control circuit, control panel, electric equipment and control method |
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