CN111541286A - Polarity switching circuit and device of battery energy storage system and battery energy storage system - Google Patents
Polarity switching circuit and device of battery energy storage system and battery energy storage system Download PDFInfo
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- CN111541286A CN111541286A CN202010347733.8A CN202010347733A CN111541286A CN 111541286 A CN111541286 A CN 111541286A CN 202010347733 A CN202010347733 A CN 202010347733A CN 111541286 A CN111541286 A CN 111541286A
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- switching unit
- battery
- circuit switching
- energy storage
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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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- 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
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
Abstract
The invention discloses a polarity switching circuit and a polarity switching device of a battery energy storage system and the battery energy storage system, wherein the circuit comprises: a circuit connection module provided with a battery connection terminal, a plurality of circuit switching units, and an ac/dc converter connection terminal; the signal acquisition processing module is used for acquiring a first voltage signal between the battery connection end electrodes and a second voltage signal between the alternating current-direct current converter connection end electrodes; and the circuit control module is used for controlling the circuit switching unit switching circuit according to the positive and negative of the first voltage signal and the second voltage signal. The polarity switching circuit of the battery energy storage system provided by the invention can automatically switch the matching of the positive electrode and the negative electrode without external interference.
Description
Technical Field
The invention relates to the technical field of storage battery charging and discharging, and discloses a polarity switching circuit and device of a battery energy storage system and the battery energy storage system.
Background
With the increasing scale of new energy power generation and the continuous development of battery energy storage technology, the electric energy storage becomes an important key technology for supporting the strategy of clean energy development in China. The battery energy storage is used as an important mode of electric energy storage, has the advantages that power and energy can be flexibly configured according to different application requirements, the response speed is high, the limitation of external conditions such as geographic resources is avoided, the battery energy storage is suitable for large-scale application and batch production, and the like, so that the battery energy storage has an irreplaceable status in the aspects of matching concentrated/distributed new energy grid connection, power grid operation assistance and the like.
The energy storage battery is used as an important unit for storing and transmitting energy in the battery energy storage system, and the alternating current-direct current conversion power unit equipment is a bridge for energy conversion between an alternating current power grid and the energy storage battery in the energy storage system. If the positive and negative electrode terminals of the energy storage battery are connected with the positive and negative terminals connected with the alternating current-direct current conversion power unit equipment in an inverted manner, the battery energy storage system cannot work normally, even the equipment is damaged, so that the economic value loss is caused, and meanwhile, the potential safety hazard is increased. At the present stage, the terminal identification is recognized by naked eyes, and meanwhile, the connection correctness is judged by detecting the positive and negative polarities of the terminal through a portable electronic detection instrument, and the portable electronic detection instrument usually uses a handheld multimeter to detect the positive and negative electrodes of the energy storage battery.
Therefore, in the prior art, whether the connection of the positive electrode and the negative electrode of the wiring terminal between the storage battery and the alternating current-direct current converter is correct or not is judged and corrected mainly by means of manual operation equipment and human eye judgment, and the problems of high detection cost, low detection efficiency and high potential safety hazard exist.
Disclosure of Invention
The invention provides a polarity switching circuit of a battery energy storage system, and aims to solve the problems of high detection cost, low detection efficiency and high potential safety hazard in the prior art that whether the connection of a positive electrode and a negative electrode of a wiring terminal between a storage battery and an alternating current-direct current converter is correct or not is judged mainly by means of manual operation equipment and human eye judgment.
The invention is realized in this way, a polarity switching circuit of a battery energy storage system, comprising:
the circuit communication module is provided with a battery connecting end, a plurality of circuit switching units and an AC-DC converter connecting end, the battery connecting end and the AC-DC converter connecting end are respectively used for non-polar connection of an electrode of a battery and an electrode of an AC-DC converter, and each circuit switching unit is connected between the battery connecting end and the AC-DC converter connecting end;
the signal acquisition processing module is used for acquiring a first voltage signal between the battery connection end electrodes and a second voltage signal between the alternating current-direct current converter connection end electrodes; and
and the circuit control module is used for controlling the circuit switching unit switching circuit according to the positive and negative of the first voltage signal and the second voltage signal so as to enable the positive and negative electrodes of the battery connecting end and the alternating current-direct current converter connecting end to be connected in a matching mode through the circuit switching unit.
Preferably, the way in which the circuit switching unit switches the circuit includes, but is not limited to, changing a connection route of the circuit switching unit and changing an on-off state of the circuit switching unit.
Preferably, the circuit switching unit switches the circuit in a manner of changing an on-off state of the circuit switching unit; the battery connecting end comprises a first connecting end and a second connecting end, the AC-DC converter connecting end comprises a third connecting end and a fourth connecting end, and the number of the circuit switching units is four, namely a first circuit switching unit, a second circuit switching unit, a third circuit switching unit and a fourth circuit switching unit;
the first circuit switching unit is connected between the first connection end and the third connection end;
the second circuit switching unit is connected between the first connection end and the fourth connection end;
the third circuit switching unit is connected between the second connection terminal and the third connection terminal;
the fourth circuit switching unit is connected between the second connection terminal and the fourth connection terminal.
Preferably, the circuit control module includes:
the first control unit is used for simultaneously controlling the first circuit switching unit and the fourth circuit switching unit to act;
and the second control unit is used for simultaneously controlling the second circuit switching unit and the third circuit switching unit to act.
Preferably, the circuit switching unit is a triac.
Preferably, the circuit switching unit switches the circuit by changing a connection route of the circuit switching unit, the battery connection end includes a fifth connection end and a sixth connection end, the ac-dc converter connection end includes a seventh connection end and an eighth connection end, and the circuit switching units are two, namely, a fifth circuit switching unit and a sixth circuit switching unit;
one end of the fifth circuit switching unit is connected with the fifth connecting end, and the other end of the fifth circuit switching unit is movably connected with one of the seventh connecting end and the eighth connecting end;
one end of the sixth circuit switching unit is connected with the sixth connecting end, and the other end of the sixth circuit switching unit is movably connected with one of the seventh connecting end and the eighth connecting end;
or
One end of the fifth circuit switching unit is connected with the seventh connecting end, and the other end of the fifth circuit switching unit is movably switched to be connected with one of the fifth connecting end and the sixth connecting end;
one end of the sixth circuit switching unit is connected to the eighth connection terminal, and the other end of the sixth circuit switching unit is movably switched to be connected to one of the fifth connection terminal and the sixth connection terminal.
One aspect of the present invention relates to a polarity switching device for a battery energy storage system, comprising:
the polarity switching circuit board of the battery energy storage system is provided with a polarity switching circuit of the battery energy storage system;
the battery connecting terminal is connected with the battery connecting terminal on the polarity switching circuit of the battery energy storage system; and
and the AC-DC converter connecting terminal is connected with the AC-DC converter connecting end on the polarity switching circuit of the battery energy storage system.
Preferably, the polarity switching device of the battery energy storage system further comprises:
the device body is provided with the battery energy storage system polarity switching circuit board, the battery connecting terminal and the AC-DC converter connecting terminal;
and the state display module is arranged on the device body and used for displaying the positive and negative electrodes of the battery connecting terminal and the AC-DC converter connecting terminal.
Another aspect of the invention relates to a battery energy storage system comprising:
a battery and an AC/DC converter; and
the polarity switching device of the battery energy storage system is respectively connected with the battery and the alternating current-direct current converter in a non-polar mode and used for controlling the switching circuit of the circuit switching unit so that the positive electrode and the negative electrode of the battery are matched with the positive electrode and the negative electrode of the alternating current-direct current converter.
According to the polarity switching circuit of the battery energy storage system, the voltage signals of the battery connecting end and the voltage signals of the two ends of the AC-DC converter connecting end are collected, the switching circuit of the circuit switching unit is controlled according to the voltage signals, the positive electrode and the negative electrode are automatically switched to be matched, external interference is not needed, and the probability of error faults of polarity connection is reduced.
Drawings
Fig. 1 is a block diagram of a polarity switching circuit of a battery energy storage system according to an embodiment of the present invention;
fig. 2 is a block diagram of a circuit control module according to an embodiment of the present invention;
fig. 3 is a block diagram of a polarity switching circuit of another battery energy storage system according to an embodiment of the present invention;
fig. 4 is a block diagram of a polarity switching circuit of another battery energy storage system according to an embodiment of the present invention;
fig. 5 is a block diagram of a polarity switching device of a battery energy storage system according to an embodiment of the present invention;
fig. 6 is a block diagram of a battery energy storage system according to an embodiment of the present invention.
In the drawings: 1. a circuit connection module; 11. a battery connection terminal; 111. a first connection end; 112. a second connection end; 115. a fifth connection end; 116. a sixth connection end; 12. a circuit switching unit; 121. a first circuit switching unit; 122. a second circuit switching unit; 123. a third circuit switching unit; 124. a fourth circuit switching unit; 125. a fifth circuit switching unit; 126. a sixth circuit switching unit; 13. the AC-DC converter is connected with the end; 131. a third connection end; 132. a fourth connection end; 137. a seventh connection end; 138. an eighth connection end; 3. a circuit control module; 31. a first control unit; 32. a second control unit; 4. a power supply module; 10. a battery energy storage system polarity switching circuit board; 20. a battery connection terminal; 201. a first terminal; 202. a second terminal; 30. an AC-DC converter connection terminal; 40. a device body; 50. a status display module; 501. a first display lamp; 502. a second display lamp; 503. a third display lamp; 504. a fourth display lamp; 100. a battery; 200. an AC-DC converter; 300. polarity switching device of battery energy storage system.
Detailed description of the preferred embodiments
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Examples
Example 1
As shown in fig. 1, a block diagram of a polarity switching circuit of a battery energy storage system according to an embodiment of the present invention is provided, in an embodiment of the present invention, the polarity switching circuit of the battery energy storage system includes:
the circuit communication module 1 is provided with a battery connecting end 11, a plurality of circuit switching units 12 and an AC-DC converter connecting end 13, wherein the battery connecting end 11 and the AC-DC converter connecting end 13 are respectively used for connecting an electrode of a battery and an electrode of an AC-DC converter in a non-polar manner, and each circuit switching unit 12 is connected between the battery connecting end 11 and the AC-DC converter connecting end 13;
the signal acquisition and processing module 2 is used for acquiring a first voltage signal between the electrodes of the battery connecting end 11 and a second voltage signal between the electrodes of the alternating current-direct current converter connecting end 13 and respectively judging the positive and negative of the first voltage signal and the second voltage signal; and
the circuit control module 3 is used for controlling each circuit switching unit 12 to perform circuit switching according to the positive and negative of the first voltage signal and the second voltage signal, so that the positive and negative electrodes of the battery connecting end 11 and the alternating current-direct current converter connecting end 13 are connected in a matching mode through each circuit switching unit 12;
in the embodiment of the present invention, the power supply module 4 is further included, and is configured to supply power to the circuit connection module 1, the signal acquisition processing module 2, and the circuit control module 3.
In the embodiment of the present invention, the battery connection terminal 11 and the ac/dc converter connection terminal 13 are respectively used for connecting an electrode of a battery and an electrode of an ac/dc converter, where the electrode of the battery and the electrode of the ac/dc converter both have positive and negative ends, and it can be understood that the battery connection terminal 11 and the ac/dc converter connection terminal 13 in the implementation of the present invention are also respectively provided with two ends and are respectively connected to the battery and the two electrodes of the ac/dc converter, but the connection is a non-polar connection, that is, the positive and negative electrodes of the battery or the positive and negative electrodes of the ac/dc converter are not distinguished, the two electrodes of the battery are directly connected to the two ends of the battery connection terminal 11 in a non-polar manner.
In the embodiment of the present invention, each circuit switching unit 12 in the actual circuit may be a common electric switch, a relay, or other electric devices that automatically control the on/off or change the connection direction of the circuit. Specifically, in the preferred embodiment of the present invention, the circuit switching unit 12 is preferably a triac, which is developed based on a common triac, and not only can replace two thyristors with opposite polarities connected in parallel, but also only needs one trigger circuit, and is an ideal common ac switching device, and will not be described in further detail herein.
In the embodiment of the present invention, the ac/dc converter connection terminal 13 is mainly used for connecting electrodes of an ac/dc converter, and since a battery discharges to output a dc power, and the dc power needs to be converted into an ac power by the ac/dc converter before being used by an ac power grid device, the ac/dc converter is usually provided for ac/dc conversion. The ac-dc converter is a conventional component in the art, and the main principle of the specific ac-dc converter will not be described in detail herein.
In the embodiment of the present invention, the signal acquisition processing module 2 specifically acquires the voltage signal of the electrode of the battery connection end 11 and the voltage signal of the electrode of the ac-dc converter connection end 13, then performs signal processing through units such as an a/D conversion unit and an operational amplifier in the signal acquisition processing module, converts the acquired analog signal into a digital signal, compares the digital signal, and determines whether the voltage signal is positive or negative.
In the embodiment of the present invention, the manner of switching the circuit by the circuit switching unit includes, but is not limited to, changing the connection route of the circuit switching unit and changing the on/off state of the circuit switching unit.
Specifically, as shown in fig. 1, in the embodiment of the present invention, the circuit switching unit 12 switches the circuit in such a manner that the on-off state of the circuit switching unit is changed; the battery connection end 11 includes a first connection end 111 and a second connection end 112, the ac-dc converter connection end 13 includes a third connection end 131 and a fourth connection end 132, and the number of the circuit switching units 12 is four, namely, a first circuit switching unit 121, a second circuit switching unit 122, a third circuit switching unit 123, and a fourth circuit switching unit 124;
the first circuit switching unit 121 is connected between the first connection terminal 111 and the third connection terminal 131;
the second circuit switching unit 122 is connected between the first connection terminal 111 and the fourth connection terminal 132;
the third circuit switching unit 123 is connected between the second connection terminal 112 and the third connection terminal 131;
the fourth circuit switching unit 124 is connected between the second connection terminal 112 and the fourth connection terminal 132.
Specifically, in the embodiment shown in fig. 1, the signal acquisition processing module acquires the voltage signal U at two ends (corresponding to the first connection end 111 and the second connection end 112) of the battery connection end A, BA、UBAnd the respective voltage signal U across the ac-dc converter connections a, b (corresponding to the third connection 131 and the fourth connection 132)a、UbTo convert the voltage signal UA、UBU obtained by comparison operationAB(corresponding to the first voltage signal), converting the voltage signal Ua、UbU obtained by comparison operationab(corresponding to the second voltage signal) and converting the second voltage signal into a digital signal to be sent to the circuit control module 3, and the circuit control module 3 sends the digital signal to the circuit control module 3 according to the UAB、UabThe positive and negative controls the on-off of the corresponding circuit switching unit, so that the two ends of the battery connecting end A, B and the two ends of the alternating current-direct current converter connecting ends a and b can realize positive and negative matching connection through the circuit switching units. The method comprises the following specific steps:
if U isA-UB>0 and Ua-Ub>0, i.e. UAB>0 and Uab>0, the circuit control module controls the first circuit switching unit 121 and the fourth circuit switching unit 124 to be closed, and simultaneously the second circuit switching unit 122 and the third circuit switching unit 123 to be disconnected, so that the end a (positive electrode) of the battery connecting end is connected with the end a (positive electrode) of the alternating current-direct current converter through the first circuit switching unit 121, and the end B (negative electrode) of the battery connecting end is connected with the end B (negative electrode) of the alternating current-direct current converter through the fourth circuit switching unit 124;
if U isA-UB>0 and Ua-Ub<0, i.e. UAB>0 and Uab<0, the second circuit switching unit 122 and the third circuit switching unit are controlled123 is closed, and meanwhile, the first circuit switching unit 121 and the fourth circuit switching unit 124 are disconnected, so that the end a (positive electrode) of the battery connection end is connected with the end B (positive electrode) of the alternating current-direct current converter connection end through the second circuit switching unit 122, and the end B (negative electrode) of the battery connection end is connected with the end a (negative electrode) of the alternating current-direct current converter connection end through the fourth circuit switching unit 124;
if U isA-UB<0 and Ua-Ub>0, i.e. UAB<0 and Uab>0, the second circuit switching unit 122 and the third circuit switching unit 123 are controlled to be closed, and meanwhile the first circuit switching unit 121 and the fourth circuit switching unit 124 are switched off, so that the end a (negative electrode) of the battery connection end is connected with the end B (negative electrode) of the alternating current-direct current converter connection end through the second circuit switching unit 122, and the end B (positive electrode) of the battery connection end is connected with the end a (positive electrode) of the alternating current-direct current converter connection end through the fourth circuit switching unit 124;
if U isA-UB<0 and Ua-Ub<0, i.e. UAB<0 and Uab<And 0, controlling the first circuit switching unit 121 and the fourth circuit switching unit 124 to be closed, and simultaneously disconnecting the second circuit switching unit 122 and the third circuit switching unit 123, so that the end a (negative electrode) of the battery connection end is connected with the end a (negative electrode) of the alternating current-direct current converter through the first circuit switching unit 121, and the end B (positive electrode) of the battery connection end is connected with the end B (positive electrode) of the alternating current-direct current converter through the fourth circuit switching unit 124.
Therefore, by adopting the circuit, the positive and negative matching connection of the battery connecting end and the alternating current-direct current converter connecting end can be realized through the on-off of each circuit switching unit under the condition that the two ends of the battery connecting end are connected with the two poles of the battery in a non-polar manner and the two ends of the alternating current-direct current converter connecting end are connected with the two poles of the alternating current-direct current converter in a non-polar manner.
In the embodiment of the present invention, as shown in fig. 2, the circuit control module 3 includes:
a first control unit 31 for controlling the first circuit switching unit 121 and the fourth circuit switching unit 124 to operate simultaneously;
and a second control unit 32 for controlling the second circuit switching unit 122 and the third circuit switching unit 123 to operate simultaneously.
Specifically, in the embodiment of the present invention, the first circuit switching unit 121, the fourth circuit switching unit 124, the second circuit switching unit 122, and the third circuit switching unit 123 are formed into two groups, and two of the two groups are controlled by the same control unit, so that the switching of the circuit switching units on the same route is performed synchronously during circuit switching, and the switching speed and efficiency are improved.
In addition, in another embodiment of the present invention, as shown in fig. 3 to 4, when the circuit switching unit switches the circuit in a manner of changing the connection route of the circuit switching unit, the battery connection terminal 11 includes a fifth connection terminal 115 and a sixth connection terminal 116, the ac/dc converter connection terminal 13 includes a seventh connection terminal 137 and an eighth connection terminal 138, and two circuit switching units 12 are provided, which are respectively the fifth circuit switching unit 125 and the sixth circuit switching unit 126.
Specifically, as shown in fig. 3, which is a block diagram of another polarity switching circuit of a battery energy storage system according to an embodiment of the present invention, one end of the fifth circuit switching unit 125 is connected to the fifth connection terminal 115, and the other end is movably connected to one of the seventh connection terminal 137 and the eighth connection terminal 138; the sixth circuit switching unit 126 has one end connected to the sixth connection terminal 116 and the other end movably connected to one of the seventh connection terminal 137 and the eighth connection terminal 138.
Specifically, in the embodiment of the present invention, the other end of the fifth circuit switching unit is movably connected to one of the seventh connection end 137 and the eighth connection end 138, where the movable means that the connection port of the fifth circuit switching unit can be electrically driven to change the circuit connection thereof, for example, by using an electric knife switch, the knife switch is driven to swing to connect with different circuit ports, so as to implement switching of different circuit routes, and there are more circuit components in the field for changing the connection routes, such as relays and the like, which are not further arranged in a row. In addition, as shown in fig. 4, a block diagram of a polarity switching circuit of a battery energy storage system according to another embodiment of the present invention is different from the embodiment shown in fig. 3 in that one end of the fifth circuit switching unit 125 is connected to the seventh connection terminal 137, and the other end is movably switched to be connected to one of the fifth connection terminal 115 and the sixth connection terminal 116; the sixth circuit switching unit 126 has one end connected to the eighth connection terminal 138 and the other end movably switched to be connected to one of the fifth connection terminal 115 and the sixth connection terminal 116.
Specifically, in the embodiment of fig. 3 and 4, the signal acquisition processing module acquires the corresponding voltage signal U across the battery connection terminal A, B and across the ac-dc converter connection terminals a and bA、UBAnd Ua、UbTo convert the voltage signal UA、UBU obtained by comparison operationABTo convert the voltage signal Ua、UbU obtained by comparison operationabAnd converted into digital signals to be sent to the circuit control module 3, and the circuit control module 3 controls the corresponding circuit switching unit to operate and switch the connected battery connection end or the ac/dc converter connection end, so that the positive and negative poles at the two ends of the battery connection end A, B and the two ends of the ac/dc converter connection ends a and b are correspondingly matched, wherein the processing and determining process of the voltage signals is the same as that in the previous embodiment, and will not be described repeatedly herein.
According to the polarity switching circuit of the battery energy storage system, the automatic switching of circuit connection is realized by collecting the voltage signals at the two ends of the battery connecting end and the connecting end of the alternating current-direct current converter and automatically controlling the switching circuit of the circuit switching unit according to the positive and negative of the voltage signals, so that the positive and negative electrodes of the battery connecting end are matched with the positive and negative electrodes of the connecting end of the alternating current-direct current converter, external interference is not needed, and the probability of error faults of polarity connection is reduced.
Example 2
An embodiment of the present invention provides a polarity switching device for a battery energy storage system, as shown in fig. 5, including:
the polarity switching circuit board 10 of the battery energy storage system is provided with the polarity switching circuit of the battery energy storage system in the previous embodiment on the polarity switching circuit board 10 of the battery energy storage system;
the battery connecting terminal 20 is connected with a battery connecting terminal on the polarity switching circuit of the battery energy storage system; as shown in fig. 5, the battery connecting terminal 20 includes a first terminal 201 and a second terminal 202.
And the AC-DC converter connecting terminal 30 is connected with the AC-DC converter connecting terminal on the polarity switching circuit of the battery energy storage system through the AC-DC converter connecting terminal 30. As shown in fig. 5, the ac/dc converter connection terminal 30 includes a third terminal 301 and a fourth terminal 302.
In an embodiment of the present invention, the polarity switching device of the battery energy storage system further includes:
the device body 40, the battery energy storage system polarity switching circuit board 10, the battery connection terminal 20 and the ac/dc converter connection terminal 30 are arranged on the device body, and specifically, as shown in fig. 5, the circuit board is installed inside the device body and only shown in a simple manner;
and a state display module 50, wherein the state display module 50 is arranged on the device body 40 and is used for displaying positive and negative electrodes of the battery connecting terminal and the AC/DC converter connecting terminal.
In the embodiment of the present invention, based on the embodiment of the above embodiment, the status display module 50 includes a first display lamp 501, a second display lamp 502, a third display lamp 503, and a fourth display lamp 504 according to the embodiment of fig. 1.
Specifically, based on the embodiment shown in fig. 1, when the circuit control module controls the circuit switching unit, the state display module 50 displays the working state of the corresponding operation signal by lighting the corresponding indicator, so that the worker can determine the positive and negative polarities of the two terminals of the battery connection terminal 20 and the positive and negative polarities of the two terminals of the ac/dc converter connection terminal 30 according to the lighted indicator.
The method comprises the following specific steps:
when U is turnedA-UB>0 and Ua-Ub>0, i.e. UAB>0 and Uab>0, controlling the first display lamp 501 to be in a lighting state, and the other indicator lamps to be in a turning-off state, wherein the first terminal 201 is an anode, the second terminal 202 is a cathode, the third terminal 301 is an anode, and the fourth terminal 302 is a cathode;
when U is turnedA-UB>0 and Ua-Ub<0, i.e. UAB>0 and Uab<0, controlling the second display lamp 502 to be in a lighting state, and the other indicator lamps to be in a turning-off state, wherein the first terminal 201 is an anode, the second terminal 202 is a cathode, the third terminal 301 is a cathode, and the fourth terminal 302 is an anode;
when U is turnedA-UB<0 and Ua-Ub>0, i.e. UAB<0 and Uab>0, controlling the third display lamp 503 to be in a lighting state, and the other indicator lamps to be in a turning-off state, wherein the first terminal 201 is a negative electrode, the second terminal 202 is a positive electrode, the third terminal 301 is a positive electrode, and the fourth terminal 302 is a negative electrode;
when U is turnedA-UB<0 and Ua-Ub<0, i.e. UAB<0 and Uab<0, the fourth indicator light 504 is controlled to be on, and the remaining indicator lights are off, which means that the first terminal 201 is negative, the second terminal 202 is positive, the third terminal 301 is negative, and the fourth terminal 302 is positive.
Specifically, the positive and negative electrodes corresponding to the battery connecting terminal of the battery energy storage system polarity switching device and the current converter connecting terminal are displayed through the display mode, so that the positive and negative electrodes and the butt joint condition of the battery and the current converter can be conveniently and quickly identified by a worker.
According to the polarity switching device of the battery energy storage system, the automatic switching of circuit connection is realized by collecting the voltage signals at the two ends of the battery connecting end and the connecting end of the alternating current-direct current converter and automatically controlling the circuit switching unit switching circuit through the positive and negative of the voltage signals, so that the positive and negative electrodes of the battery connecting terminal are matched with the positive and negative electrodes of the connecting terminal of the alternating current-direct current converter, external interference is not needed, and the probability of error faults of polarity connection is reduced; meanwhile, the corresponding conditions of the anode and the cathode are displayed, so that the anode, the cathode and the butt joint conditions of the battery and the current converter can be conveniently and quickly identified by workers.
Example 3
As shown in fig. 6, in an embodiment of the present invention, there is further provided a battery energy storage system, including:
a battery 100 and an ac-dc converter 200; and
in the battery energy storage system polarity switching device 300 in the foregoing embodiment, the battery energy storage system polarity switching device is connected to the battery 100 and the ac/dc converter 200 in a non-polar manner, and is used for switching the circuit through the control circuit switching unit, so as to match the positive and negative electrodes of the battery 100 and the ac/dc converter 200.
In the embodiment of the present invention, the battery energy storage system polarity switching device 300 has been described in detail in the foregoing embodiments, and will not be repeated here. The battery 100 may be a simple single storage battery, or a storage battery assembly composed of a plurality of storage batteries, and mainly plays a role in energy storage and power supply; the AC-DC converter, which is a common AC/DC converter in the art, is mainly a device for converting AC power and DC power, and will not be further described herein.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. 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 (9)
1. A battery energy storage system polarity switching circuit, comprising:
the circuit communication module is provided with a battery connecting end, a plurality of circuit switching units and an AC-DC converter connecting end, the battery connecting end and the AC-DC converter connecting end are respectively used for non-polar connection of an electrode of a battery and an electrode of an AC-DC converter, and each circuit switching unit is connected between the battery connecting end and the AC-DC converter connecting end;
the signal acquisition processing module is used for acquiring a first voltage signal between the battery connection end electrodes and a second voltage signal between the alternating current-direct current converter connection end electrodes; and
and the circuit control module is used for controlling the circuit switching unit switching circuit according to the positive and negative of the first voltage signal and the second voltage signal so as to enable the positive and negative electrodes of the battery connecting end and the alternating current-direct current converter connecting end to be connected in a matching mode through the circuit switching unit.
2. The polarity switching circuit of the battery energy storage system according to claim 1, wherein the circuit switching unit switches the circuit in a manner including, but not limited to, changing a connection route of the circuit switching unit and changing an on/off state of the circuit switching unit.
3. The polarity switching circuit of claim 2, wherein the circuit switching unit switches the circuit in a manner that changes an on/off state of the circuit switching unit; the battery connecting end comprises a first connecting end and a second connecting end, the AC-DC converter connecting end comprises a third connecting end and a fourth connecting end, and the number of the circuit switching units is four, namely a first circuit switching unit, a second circuit switching unit, a third circuit switching unit and a fourth circuit switching unit;
the first circuit switching unit is connected between the first connection end and the third connection end;
the second circuit switching unit is connected between the first connection end and the fourth connection end;
the third circuit switching unit is connected between the second connection terminal and the third connection terminal;
the fourth circuit switching unit is connected between the second connection terminal and the fourth connection terminal.
4. The battery energy storage system polarity switching circuit of claim 3, wherein the circuit control module comprises:
the first control unit is used for simultaneously controlling the first circuit switching unit and the fourth circuit switching unit to act;
and the second control unit is used for simultaneously controlling the second circuit switching unit and the third circuit switching unit to act.
5. The battery energy storage system polarity switching circuit of claim 1, wherein the circuit switching unit is a triac.
6. The polarity switching circuit of the battery energy storage system according to claim 2, wherein the circuit switching unit switches the circuit by changing a connection route of the circuit switching unit, the battery connection terminals include a fifth connection terminal and a sixth connection terminal, the ac-dc converter connection terminals include a seventh connection terminal and an eighth connection terminal, and the circuit switching units are provided in two, namely, a fifth circuit switching unit and a sixth circuit switching unit;
one end of the fifth circuit switching unit is connected with the fifth connecting end, and the other end of the fifth circuit switching unit is movably connected with one of the seventh connecting end and the eighth connecting end;
one end of the sixth circuit switching unit is connected with the sixth connecting end, and the other end of the sixth circuit switching unit is movably connected with one of the seventh connecting end and the eighth connecting end;
or
One end of the fifth circuit switching unit is connected with the seventh connecting end, and the other end of the fifth circuit switching unit is movably switched to be connected with one of the fifth connecting end and the sixth connecting end;
one end of the sixth circuit switching unit is connected to the eighth connection terminal, and the other end of the sixth circuit switching unit is movably switched to be connected to one of the fifth connection terminal and the sixth connection terminal.
7. A polarity switching device for a battery energy storage system, comprising:
the polarity switching circuit board of the battery energy storage system is provided with a polarity switching circuit of the battery energy storage system according to any one of claims 1 to 6;
the battery connecting terminal is connected with the battery connecting terminal on the polarity switching circuit of the battery energy storage system; and
and the AC-DC converter connecting terminal is connected with the AC-DC converter connecting end on the polarity switching circuit of the battery energy storage system.
8. The battery energy storage system polarity switching device of claim 7, further comprising:
the device body is provided with the battery energy storage system polarity switching circuit board, the battery connecting terminal and the AC-DC converter connecting terminal;
and the state display module is arranged on the device body and used for displaying the positive and negative electrodes of the battery connecting terminal and the AC-DC converter connecting terminal.
9. A battery energy storage system, comprising:
a battery and an AC/DC converter; and
the polarity switching device of the battery energy storage system as claimed in any one of claims 7 to 8, wherein the polarity switching device of the battery energy storage system is connected to the battery and the ac/dc converter in a non-polar manner, and is used for controlling the circuit switching unit to switch the circuit, so as to match the positive electrode and the negative electrode of the battery and the ac/dc converter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010347733.8A CN111541286A (en) | 2020-04-28 | 2020-04-28 | Polarity switching circuit and device of battery energy storage system and battery energy storage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010347733.8A CN111541286A (en) | 2020-04-28 | 2020-04-28 | Polarity switching circuit and device of battery energy storage system and battery energy storage system |
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| CN111541286A true CN111541286A (en) | 2020-08-14 |
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| CN202010347733.8A Pending CN111541286A (en) | 2020-04-28 | 2020-04-28 | Polarity switching circuit and device of battery energy storage system and battery energy storage system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201303409Y (en) * | 2008-10-23 | 2009-09-02 | 祐鼎科技股份有限公司 | Non-polar microphone |
| CN201319574Y (en) * | 2008-12-15 | 2009-09-30 | 北京丰隆技术有限公司 | DC motor power supply |
| CN103595110A (en) * | 2012-08-15 | 2014-02-19 | 郭振华 | Polarity identification converting circuit for charger |
| CN104467044A (en) * | 2013-09-22 | 2015-03-25 | 深圳市海洋王照明工程有限公司 | Charging control circuit and charger |
| CN105591430A (en) * | 2015-12-31 | 2016-05-18 | 深圳市华思旭科技有限公司 | Intelligent wire-connection control device |
| CN205509613U (en) * | 2016-02-06 | 2016-08-24 | 镇江锐翼自动化科技有限公司 | Automatic electric vehicle charging ware of positive negative pole is switched over in discernment |
| CN207426001U (en) * | 2017-10-19 | 2018-05-29 | 福建猛狮新能源科技有限公司 | A kind of rising with dipole inversion function employs lithium-ions battery and its circuit |
-
2020
- 2020-04-28 CN CN202010347733.8A patent/CN111541286A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201303409Y (en) * | 2008-10-23 | 2009-09-02 | 祐鼎科技股份有限公司 | Non-polar microphone |
| CN201319574Y (en) * | 2008-12-15 | 2009-09-30 | 北京丰隆技术有限公司 | DC motor power supply |
| CN103595110A (en) * | 2012-08-15 | 2014-02-19 | 郭振华 | Polarity identification converting circuit for charger |
| CN104467044A (en) * | 2013-09-22 | 2015-03-25 | 深圳市海洋王照明工程有限公司 | Charging control circuit and charger |
| CN105591430A (en) * | 2015-12-31 | 2016-05-18 | 深圳市华思旭科技有限公司 | Intelligent wire-connection control device |
| CN205509613U (en) * | 2016-02-06 | 2016-08-24 | 镇江锐翼自动化科技有限公司 | Automatic electric vehicle charging ware of positive negative pole is switched over in discernment |
| CN207426001U (en) * | 2017-10-19 | 2018-05-29 | 福建猛狮新能源科技有限公司 | A kind of rising with dipole inversion function employs lithium-ions battery and its circuit |
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